phy_procedures_lte_eNb.c 117 KB
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/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.0  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */
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/*! \file phy_procedures_lte_eNB.c
 * \brief Implementation of eNB procedures from 36.213 LTE specifications
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 * \author R. Knopp, F. Kaltenberger, N. Nikaein, X. Foukas
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 * \date 2011
 * \version 0.1
 * \company Eurecom
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 * \email: knopp@eurecom.fr,florian.kaltenberger@eurecom.fr,navid.nikaein@eurecom.fr, x.foukas@sms.ed.ac.uk
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 * \note
 * \warning
 */

#include "PHY/defs.h"
#include "PHY/extern.h"
#include "SCHED/defs.h"
#include "SCHED/extern.h"

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#include "PHY/LTE_TRANSPORT/if4_tools.h"
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#include "PHY/LTE_TRANSPORT/if5_tools.h"
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#ifdef EMOS
#include "SCHED/phy_procedures_emos.h"
#endif

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//#define DEBUG_PHY_PROC (Already defined in cmake)
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//#define DEBUG_ULSCH

#include "LAYER2/MAC/extern.h"
#include "LAYER2/MAC/defs.h"
#include "UTIL/LOG/log.h"
#include "UTIL/LOG/vcd_signal_dumper.h"

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#include "T.h"

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#include "assertions.h"
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#include "msc.h"
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#include <time.h>

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#if defined(ENABLE_ITTI)
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#   include "intertask_interface.h"
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#endif

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#if defined(FLEXRAN_AGENT_SB_IF)
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//Agent-related headers
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#include "ENB_APP/flexran_agent_extern.h"
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#include "ENB_APP/CONTROL_MODULES/MAC/flexran_agent_mac.h"
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#include "LAYER2/MAC/flexran_agent_mac_proto.h"
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#endif
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//#define DIAG_PHY

#define NS_PER_SLOT 500000

#define PUCCH 1

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void exit_fun(const char* s);

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extern int exit_openair;
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struct timespec start_fh, start_fh_prev;
int start_fh_sf, start_fh_prev_sf;
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// Fix per CC openair rf/if device update
// extern openair0_device openair0;
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unsigned char dlsch_input_buffer[2700] __attribute__ ((aligned(32)));
int eNB_sync_buffer0[640*6] __attribute__ ((aligned(32)));
int eNB_sync_buffer1[640*6] __attribute__ ((aligned(32)));
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int *eNB_sync_buffer[2] = {eNB_sync_buffer0, eNB_sync_buffer1};

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extern uint16_t hundred_times_log10_NPRB[100];
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unsigned int max_peak_val;
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int max_sync_pos;
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int harq_pid_updated[NUMBER_OF_UE_MAX][8] = {{0}};
int harq_pid_round[NUMBER_OF_UE_MAX][8] = {{0}};

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//DCI_ALLOC_t dci_alloc[8];

#ifdef EMOS
fifo_dump_emos_eNB emos_dump_eNB;
#endif

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#if defined(SMBV) 
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extern const char smbv_fname[];
extern unsigned short config_frames[4];
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extern uint8_t smbv_frame_cnt;
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#endif

#ifdef DIAG_PHY
extern int rx_sig_fifo;
#endif

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uint8_t is_SR_subframe(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc,uint8_t UE_id)
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{
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  const int subframe = proc->subframe_rx;
  const int frame = proc->frame_rx;
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  LOG_D(PHY,"[eNB %d][SR %x] Frame %d subframe %d Checking for SR TXOp(sr_ConfigIndex %d)\n",
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        eNB->Mod_id,eNB->ulsch[UE_id]->rnti,frame,subframe,
        eNB->scheduling_request_config[UE_id].sr_ConfigIndex);
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  if (eNB->scheduling_request_config[UE_id].sr_ConfigIndex <= 4) {        // 5 ms SR period
    if ((subframe%5) == eNB->scheduling_request_config[UE_id].sr_ConfigIndex)
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      return(1);
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  } else if (eNB->scheduling_request_config[UE_id].sr_ConfigIndex <= 14) { // 10 ms SR period
    if (subframe==(eNB->scheduling_request_config[UE_id].sr_ConfigIndex-5))
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      return(1);
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  } else if (eNB->scheduling_request_config[UE_id].sr_ConfigIndex <= 34) { // 20 ms SR period
    if ((10*(frame&1)+subframe) == (eNB->scheduling_request_config[UE_id].sr_ConfigIndex-15))
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      return(1);
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  } else if (eNB->scheduling_request_config[UE_id].sr_ConfigIndex <= 74) { // 40 ms SR period
    if ((10*(frame&3)+subframe) == (eNB->scheduling_request_config[UE_id].sr_ConfigIndex-35))
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      return(1);
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  } else if (eNB->scheduling_request_config[UE_id].sr_ConfigIndex <= 154) { // 80 ms SR period
    if ((10*(frame&7)+subframe) == (eNB->scheduling_request_config[UE_id].sr_ConfigIndex-75))
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      return(1);
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  }

  return(0);
}
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int32_t add_ue(int16_t rnti, PHY_VARS_eNB *eNB)
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{
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  uint8_t i;
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  LOG_D(PHY,"[eNB %d/%d] Adding UE with rnti %x\n",
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        eNB->Mod_id,
        eNB->CC_id,
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        (uint16_t)rnti);
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  for (i=0; i<NUMBER_OF_UE_MAX; i++) {
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    if ((eNB->dlsch[i]==NULL) || (eNB->ulsch[i]==NULL)) {
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      MSC_LOG_EVENT(MSC_PHY_ENB, "0 Failed add ue %"PRIx16" (ENOMEM)", rnti);
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      LOG_E(PHY,"Can't add UE, not enough memory allocated\n");
      return(-1);
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    } else {
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      if (eNB->UE_stats[i].crnti==0) {
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        MSC_LOG_EVENT(MSC_PHY_ENB, "0 Add ue %"PRIx16" ", rnti);
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        LOG_D(PHY,"UE_id %d associated with rnti %x\n",i, (uint16_t)rnti);
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        eNB->dlsch[i][0]->rnti = rnti;
        eNB->ulsch[i]->rnti = rnti;
        eNB->UE_stats[i].crnti = rnti;
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	eNB->UE_stats[i].Po_PUCCH1_below = 0;
	eNB->UE_stats[i].Po_PUCCH1_above = (int32_t)pow(10.0,.1*(eNB->frame_parms.ul_power_control_config_common.p0_NominalPUCCH+eNB->rx_total_gain_dB));
	eNB->UE_stats[i].Po_PUCCH        = (int32_t)pow(10.0,.1*(eNB->frame_parms.ul_power_control_config_common.p0_NominalPUCCH+eNB->rx_total_gain_dB));
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	LOG_D(PHY,"Initializing Po_PUCCH: p0_NominalPUCCH %d, gain %d => %d\n",
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	      eNB->frame_parms.ul_power_control_config_common.p0_NominalPUCCH,
	      eNB->rx_total_gain_dB,
	      eNB->UE_stats[i].Po_PUCCH);
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        return(i);
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      }
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    }
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  }
  return(-1);
}

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int mac_phy_remove_ue(module_id_t Mod_idP,rnti_t rntiP) {
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  uint8_t i;
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  int CC_id;
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  PHY_VARS_eNB *eNB;
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  for (CC_id=0;CC_id<MAX_NUM_CCs;CC_id++) {
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    eNB = PHY_vars_eNB_g[Mod_idP][CC_id];
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    for (i=0; i<NUMBER_OF_UE_MAX; i++) {
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      if ((eNB->dlsch[i]==NULL) || (eNB->ulsch[i]==NULL)) {
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	MSC_LOG_EVENT(MSC_PHY_ENB, "0 Failed remove ue %"PRIx16" (ENOMEM)", rnti);
	LOG_E(PHY,"Can't remove UE, not enough memory allocated\n");
	return(-1);
      } else {
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	if (eNB->UE_stats[i].crnti==rntiP) {
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	  MSC_LOG_EVENT(MSC_PHY_ENB, "0 Removed ue %"PRIx16" ", rntiP);
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	  LOG_D(PHY,"eNB %d removing UE %d with rnti %x\n",eNB->Mod_id,i,rntiP);

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	  //LOG_D(PHY,("[PHY] UE_id %d\n",i);
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	  clean_eNb_dlsch(eNB->dlsch[i][0]);
	  clean_eNb_ulsch(eNB->ulsch[i]);
	  //eNB->UE_stats[i].crnti = 0;
	  memset(&eNB->UE_stats[i],0,sizeof(LTE_eNB_UE_stats));
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	  //  mac_exit_wrapper("Removing UE");
	  
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	  return(i);
	}
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      }
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    }
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  }
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  MSC_LOG_EVENT(MSC_PHY_ENB, "0 Failed remove ue %"PRIx16" (not found)", rntiP);
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  return(-1);
}

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int8_t find_next_ue_index(PHY_VARS_eNB *eNB)
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{
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  uint8_t i;
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  for (i=0; i<NUMBER_OF_UE_MAX; i++) {
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    if (eNB->UE_stats[i].crnti==0) {
      /*if ((eNB->dlsch[i]) &&
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	(eNB->dlsch[i][0]) &&
	(eNB->dlsch[i][0]->rnti==0))*/
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      LOG_D(PHY,"Next free UE id is %d\n",i);
      return(i);
    }
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  }
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  return(-1);
}

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int get_ue_active_harq_pid(const uint8_t Mod_id,const uint8_t CC_id,const uint16_t rnti, const int frame, const uint8_t subframe,uint8_t *harq_pid,uint8_t *round,const uint8_t harq_flag)
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{
  LTE_eNB_DLSCH_t *DLSCH_ptr;
  LTE_eNB_ULSCH_t *ULSCH_ptr;
  uint8_t ulsch_subframe,ulsch_frame;
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  int i;
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  int8_t UE_id = find_ue(rnti,PHY_vars_eNB_g[Mod_id][CC_id]);
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  if (UE_id==-1) {
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    LOG_D(PHY,"Cannot find UE with rnti %x (Mod_id %d, CC_id %d)\n",rnti, Mod_id, CC_id);
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    *round=0;
    return(-1);
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  }

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  if ((harq_flag == openair_harq_DL) || (harq_flag == openair_harq_RA))  {// this is a DL request

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    DLSCH_ptr = PHY_vars_eNB_g[Mod_id][CC_id]->dlsch[(uint32_t)UE_id][0];
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    if (harq_flag == openair_harq_RA) {
      if (DLSCH_ptr->harq_processes[0] != NULL) {
	*harq_pid = 0;
	*round = DLSCH_ptr->harq_processes[0]->round;
	return 0;
      } else {
	return -1;
      }
    }

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    /* let's go synchronous for the moment - maybe we can change at some point */
    i = (frame * 10 + subframe) % 8;
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    if (DLSCH_ptr->harq_processes[i]->status == ACTIVE) {
      *harq_pid = i;
      *round = DLSCH_ptr->harq_processes[i]->round;
    } else if (DLSCH_ptr->harq_processes[i]->status == SCH_IDLE) {
      *harq_pid = i;
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      *round = 0;
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    } else {
      printf("%s:%d: bad state for harq process - PLEASE REPORT!!\n", __FILE__, __LINE__);
      abort();
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    }
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  } else { // This is a UL request
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    ULSCH_ptr = PHY_vars_eNB_g[Mod_id][CC_id]->ulsch[(uint32_t)UE_id];
    ulsch_subframe = pdcch_alloc2ul_subframe(&PHY_vars_eNB_g[Mod_id][CC_id]->frame_parms,subframe);
    ulsch_frame    = pdcch_alloc2ul_frame(&PHY_vars_eNB_g[Mod_id][CC_id]->frame_parms,frame,subframe);
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    // Note this is for TDD configuration 3,4,5 only
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    *harq_pid = subframe2harq_pid(&PHY_vars_eNB_g[Mod_id][CC_id]->frame_parms,
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                                  ulsch_frame,
                                  ulsch_subframe);
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    *round    = ULSCH_ptr->harq_processes[*harq_pid]->round;
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    LOG_T(PHY,"[eNB %d][PUSCH %d] Frame %d subframe %d Checking HARQ, round %d\n",Mod_id,*harq_pid,frame,subframe,*round);
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  }
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  return(0);
}

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int16_t get_target_pusch_rx_power(const module_id_t module_idP, const uint8_t CC_id)
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{
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  return PHY_vars_eNB_g[module_idP][CC_id]->frame_parms.ul_power_control_config_common.p0_NominalPUSCH;
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}

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int16_t get_target_pucch_rx_power(const module_id_t module_idP, const uint8_t CC_id)
{
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  return PHY_vars_eNB_g[module_idP][CC_id]->frame_parms.ul_power_control_config_common.p0_NominalPUCCH;
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}

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#ifdef EMOS
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void phy_procedures_emos_eNB_TX(unsigned char subframe, PHY_VARS_eNB *eNB)
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{
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}
#endif

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void phy_procedures_eNB_S_RX(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc,relaying_type_t r_type)
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{
  UNUSED(r_type);
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  int subframe = proc->subframe_rx;
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#ifdef DEBUG_PHY_PROC
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  LOG_D(PHY,"[eNB %d] Frame %d: Doing phy_procedures_eNB_S_RX(%d)\n", eNB->Mod_id,proc->frame_rx, subframe);
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#endif
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  if (eNB->abstraction_flag == 0) {
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    lte_eNB_I0_measurements(eNB,
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			    subframe,
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                            0,
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                            eNB->first_run_I0_measurements);
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  }
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#ifdef PHY_ABSTRACTION
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  else {
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    lte_eNB_I0_measurements_emul(eNB,
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                                 0);
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  }
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#endif

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}

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#ifdef EMOS
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void phy_procedures_emos_eNB_RX(unsigned char subframe,PHY_VARS_eNB *eNB)
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{

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  uint8_t aa;
  uint16_t last_subframe_emos;
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  uint16_t pilot_pos1 = 3 - eNB->frame_parms.Ncp, pilot_pos2 = 10 - 2*eNB->frame_parms.Ncp;
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  uint32_t bytes;
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  last_subframe_emos=0;

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#ifdef EMOS_CHANNEL
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  //if (last_slot%2==1) // this is for all UL subframes
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  if (subframe==3)
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    for (aa=0; aa<eNB->frame_parms.nb_antennas_rx; aa++) {
      memcpy(&emos_dump_eNB.channel[aa][last_subframe_emos*2*eNB->frame_parms.N_RB_UL*12],
             &eNB->pusch_vars[0]->drs_ch_estimates[0][aa][eNB->frame_parms.N_RB_UL*12*pilot_pos1],
             eNB->frame_parms.N_RB_UL*12*sizeof(int));
      memcpy(&emos_dump_eNB.channel[aa][(last_subframe_emos*2+1)*eNB->frame_parms.N_RB_UL*12],
             &eNB->pusch_vars[0]->drs_ch_estimates[0][aa][eNB->frame_parms.N_RB_UL*12*pilot_pos2],
             eNB->frame_parms.N_RB_UL*12*sizeof(int));
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    }
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#endif

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  if (subframe==4) {
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    emos_dump_eNB.timestamp = rt_get_time_ns();
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    emos_dump_eNB.frame_tx = eNB->proc[subframe].frame_rx;
    emos_dump_eNB.rx_total_gain_dB = eNB->rx_total_gain_dB;
    emos_dump_eNB.mimo_mode = eNB->transmission_mode[0];
    memcpy(&emos_dump_eNB.measurements,
           &eNB->measurements[0],
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           sizeof(PHY_MEASUREMENTS_eNB));
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    memcpy(&emos_dump_eNB.UE_stats[0],&eNB->UE_stats[0],NUMBER_OF_UE_MAX*sizeof(LTE_eNB_UE_stats));
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    bytes = rtf_put(CHANSOUNDER_FIFO_MINOR, &emos_dump_eNB, sizeof(fifo_dump_emos_eNB));
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    //bytes = rtf_put(CHANSOUNDER_FIFO_MINOR, "test", sizeof("test"));
    if (bytes!=sizeof(fifo_dump_emos_eNB)) {
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      LOG_W(PHY,"[eNB %d] Frame %d, subframe %d, Problem writing EMOS data to FIFO (bytes=%d, size=%d)\n",
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            eNB->Mod_id,eNB->proc[(subframe+1)%10].frame_rx, subframe,bytes,sizeof(fifo_dump_emos_eNB));
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    } else {
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      if (eNB->proc[(subframe+1)%10].frame_tx%100==0) {
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        LOG_I(PHY,"[eNB %d] Frame %d (%d), subframe %d, Writing %d bytes EMOS data to FIFO\n",
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              eNB->Mod_id,eNB->proc[(subframe+1)%10].frame_rx, ((fifo_dump_emos_eNB*)&emos_dump_eNB)->frame_tx, subframe, bytes);
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      }
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    }
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  }
}
#endif


#define AMP_OVER_SQRT2 ((AMP*ONE_OVER_SQRT2_Q15)>>15)
#define AMP_OVER_2 (AMP>>1)
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int QPSK[4]= {AMP_OVER_SQRT2|(AMP_OVER_SQRT2<<16),AMP_OVER_SQRT2|((65536-AMP_OVER_SQRT2)<<16),((65536-AMP_OVER_SQRT2)<<16)|AMP_OVER_SQRT2,((65536-AMP_OVER_SQRT2)<<16)|(65536-AMP_OVER_SQRT2)};
int QPSK2[4]= {AMP_OVER_2|(AMP_OVER_2<<16),AMP_OVER_2|((65536-AMP_OVER_2)<<16),((65536-AMP_OVER_2)<<16)|AMP_OVER_2,((65536-AMP_OVER_2)<<16)|(65536-AMP_OVER_2)};
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unsigned int taus(void);
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DCI_PDU DCI_pdu_tmp;
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void pmch_procedures(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc,PHY_VARS_RN *rn,relaying_type_t r_type) {
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#ifdef Rel10
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  MCH_PDU *mch_pduP;
  MCH_PDU  mch_pdu;
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  //  uint8_t sync_area=255;
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#endif
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  int subframe = proc->subframe_tx;
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  if (eNB->abstraction_flag==0) {
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    // This is DL-Cell spec pilots in Control region
    generate_pilots_slot(eNB,
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			 eNB->common_vars.txdataF[0],
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			 AMP,
			 subframe<<1,1);
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  }
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#ifdef Rel10
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  // if mcch is active, send regardless of the node type: eNB or RN
  // when mcch is active, MAC sched does not allow MCCH and MTCH multiplexing
  mch_pduP = mac_xface->get_mch_sdu(eNB->Mod_id,
				    eNB->CC_id,
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				    proc->frame_tx,
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				    subframe);
  
  switch (r_type) {
  case no_relay:
    if ((mch_pduP->Pdu_size > 0) && (mch_pduP->sync_area == 0)) // TEST: only transmit mcch for sync area 0
      LOG_I(PHY,"[eNB%"PRIu8"] Frame %d subframe %d : Got MCH pdu for MBSFN (MCS %"PRIu8", TBS %d) \n",
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	    eNB->Mod_id,proc->frame_tx,subframe,mch_pduP->mcs,
	    eNB->dlsch_MCH->harq_processes[0]->TBS>>3);
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    else {
      LOG_D(PHY,"[DeNB %"PRIu8"] Frame %d subframe %d : Do not transmit MCH pdu for MBSFN sync area %"PRIu8" (%s)\n",
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	    eNB->Mod_id,proc->frame_tx,subframe,mch_pduP->sync_area,
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	    (mch_pduP->Pdu_size == 0)? "Empty MCH PDU":"Let RN transmit for the moment");
      mch_pduP = NULL;
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    }
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    break;
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  case multicast_relay:
    if ((mch_pduP->Pdu_size > 0) && ((mch_pduP->mcch_active == 1) || mch_pduP->msi_active==1)) {
      LOG_I(PHY,"[RN %"PRIu8"] Frame %d subframe %d: Got the MCH PDU for MBSFN  sync area %"PRIu8" (MCS %"PRIu8", TBS %"PRIu16")\n",
	    rn->Mod_id,rn->frame, subframe,
	    mch_pduP->sync_area,mch_pduP->mcs,mch_pduP->Pdu_size);
    } else if (rn->mch_avtive[subframe%5] == 1) { // SF2 -> SF7, SF3 -> SF8
      mch_pduP= &mch_pdu;
      memcpy(&mch_pduP->payload, // could be a simple copy
	     rn->dlsch_rn_MCH[subframe%5]->harq_processes[0]->b,
	     rn->dlsch_rn_MCH[subframe%5]->harq_processes[0]->TBS>>3);
      mch_pduP->Pdu_size = (uint16_t) (rn->dlsch_rn_MCH[subframe%5]->harq_processes[0]->TBS>>3);
      mch_pduP->mcs = rn->dlsch_rn_MCH[subframe%5]->harq_processes[0]->mcs;
      LOG_I(PHY,"[RN %"PRIu8"] Frame %d subframe %d: Forward the MCH PDU for MBSFN received on SF %d sync area %"PRIu8" (MCS %"PRIu8", TBS %"PRIu16")\n",
	    rn->Mod_id,rn->frame, subframe,subframe%5,
	    rn->sync_area[subframe%5],mch_pduP->mcs,mch_pduP->Pdu_size);
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    } else {
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      mch_pduP=NULL;
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    }
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    rn->mch_avtive[subframe]=0;
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    break;
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  default:
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    LOG_W(PHY,"[eNB %"PRIu8"] Frame %d subframe %d: unknown relaying type %d \n",
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	  eNB->Mod_id,proc->frame_tx,subframe,r_type);
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    mch_pduP=NULL;
    break;
  }// switch
  
  if (mch_pduP) {
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    fill_eNB_dlsch_MCH(eNB,mch_pduP->mcs,1,0);
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    // Generate PMCH
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    generate_mch(eNB,proc,(uint8_t*)mch_pduP->payload);
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  } else {
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    LOG_D(PHY,"[eNB/RN] Frame %d subframe %d: MCH not generated \n",proc->frame_tx,subframe);
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  }
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#endif
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}
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void common_signal_procedures (PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc) {
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  LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
  int **txdataF = eNB->common_vars.txdataF[0];
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  uint8_t *pbch_pdu=&eNB->pbch_pdu[0];
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  int subframe = proc->subframe_tx;
  int frame = proc->frame_tx;
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  // generate Cell-Specific Reference Signals for both slots
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  if (eNB->abstraction_flag==0) {
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    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_RS_TX,1);
    generate_pilots_slot(eNB,
			 txdataF,
			 AMP,
			 subframe<<1,0);
    // check that 2nd slot is for DL
    if (subframe_select(fp,subframe) == SF_DL)
      generate_pilots_slot(eNB,
			   txdataF,
			   AMP,
			   (subframe<<1)+1,0);
    
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_RS_TX,0);
  }    
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  // First half of PSS/SSS (FDD, slot 0)
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  if (subframe == 0) {
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    if ((fp->frame_type == FDD) &&
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	(eNB->abstraction_flag==0)) {
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      generate_pss(txdataF,
		   AMP,
		   fp,
		   (fp->Ncp==NORMAL) ? 6 : 5,
		   0);
      generate_sss(txdataF,
		   AMP,
		   fp,
		   (fp->Ncp==NORMAL) ? 5 : 4,
		   0);
      
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    }
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    // generate PBCH (Physical Broadcast CHannel) info
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    if ((frame&3) == 0) {
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      pbch_pdu[2] = 0;
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      // FIXME setting pbch_pdu[2] to zero makes the switch statement easier: remove all the or-operators
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      switch (fp->N_RB_DL) {
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      case 6:
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	pbch_pdu[2] = (pbch_pdu[2]&0x1f) | (0<<5);
	break;
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      case 15:
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	pbch_pdu[2] = (pbch_pdu[2]&0x1f) | (1<<5);
	break;
	
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      case 25:
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	pbch_pdu[2] = (pbch_pdu[2]&0x1f) | (2<<5);
	break;
	
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      case 50:
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	pbch_pdu[2] = (pbch_pdu[2]&0x1f) | (3<<5);
	break;
	
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      case 75:
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	pbch_pdu[2] = (pbch_pdu[2]&0x1f) | (4<<5);
	break;
	
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      case 100:
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	pbch_pdu[2] = (pbch_pdu[2]&0x1f) | (5<<5);
	break;
	
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      default:
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	// FIXME if we get here, this should be flagged as an error, right?
	pbch_pdu[2] = (pbch_pdu[2]&0x1f) | (2<<5);
	break;
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      }
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      pbch_pdu[2] = (pbch_pdu[2]&0xef) |
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	((fp->phich_config_common.phich_duration << 4)&0x10);
      
      switch (fp->phich_config_common.phich_resource) {
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      case oneSixth:
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	pbch_pdu[2] = (pbch_pdu[2]&0xf3) | (0<<2);
	break;
	
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      case half:
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	pbch_pdu[2] = (pbch_pdu[2]&0xf3) | (1<<2);
	break;
	
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      case one:
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	pbch_pdu[2] = (pbch_pdu[2]&0xf3) | (2<<2);
	break;
	
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      case two:
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	pbch_pdu[2] = (pbch_pdu[2]&0xf3) | (3<<2);
	break;
	
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      default:
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	// unreachable
	break;
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      }
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      pbch_pdu[2] = (pbch_pdu[2]&0xfc) | ((frame>>8)&0x3);
      pbch_pdu[1] = frame&0xfc;
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      pbch_pdu[0] = 0;
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    }
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    /// First half of SSS (TDD, slot 1)
    
    if ((fp->frame_type == TDD)&&
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	(eNB->abstraction_flag==0)){
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      generate_sss(txdataF,
		   AMP,
		   fp,
		   (fp->Ncp==NORMAL) ? 6 : 5,
		   1);
    }
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    /// generate PBCH
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    if (eNB->abstraction_flag==0) {
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      generate_pbch(&eNB->pbch,
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                    txdataF,
                    AMP,
                    fp,
                    pbch_pdu,
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                    frame&3);
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    }
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#ifdef PHY_ABSTRACTION
    else {
      generate_pbch_emul(eNB,pbch_pdu);
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    }
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#endif
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  }
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  else if ((subframe == 1) &&
	   (fp->frame_type == TDD)&&
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	   (eNB->abstraction_flag==0)) {
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    generate_pss(txdataF,
		 AMP,
		 fp,
		 2,
		 2);
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  }
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  // Second half of PSS/SSS (FDD, slot 10)
  else if ((subframe == 5) && 
	   (fp->frame_type == FDD) &&
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	   (eNB->abstraction_flag==0)) {
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    generate_pss(txdataF,
		 AMP,
		 &eNB->frame_parms,
		 (fp->Ncp==NORMAL) ? 6 : 5,
		 10);
    generate_sss(txdataF,
		 AMP,
		 &eNB->frame_parms,
		 (fp->Ncp==NORMAL) ? 5 : 4,
		 10);
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  }
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  //  Second-half of SSS (TDD, slot 11)
  else if ((subframe == 5) &&
	   (fp->frame_type == TDD) &&
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	   (eNB->abstraction_flag==0)) {
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    generate_sss(txdataF,
		 AMP,
		 fp,
		 (fp->Ncp==NORMAL) ? 6 : 5,
		 11);
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  }
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  // Second half of PSS (TDD, slot 12)
  else if ((subframe == 6) &&
	   (fp->frame_type == TDD) &&
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	   (eNB->abstraction_flag==0)) {
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    generate_pss(txdataF,
		 AMP,
		 fp,
		 2,
		 12);
  }
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}
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void generate_eNB_dlsch_params(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc,DCI_ALLOC_t *dci_alloc,const int UE_id) {
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  LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
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  int frame = proc->frame_tx;
  int subframe = proc->subframe_tx;
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  // if we have SI_RNTI, configure dlsch parameters and CCE index
  if (dci_alloc->rnti == SI_RNTI) {
    LOG_D(PHY,"Generating dlsch params for SI_RNTI\n");
    generate_eNB_dlsch_params_from_dci(frame,
				       subframe,
				       &dci_alloc->dci_pdu[0],
				       dci_alloc->rnti,
				       dci_alloc->format,
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				       &eNB->dlsch_SI,
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				       fp,
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				       NULL,
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				       SI_RNTI,
				       0,
				       P_RNTI,
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				       eNB->UE_stats[0].DL_pmi_single,
				       0);
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    eNB->dlsch_SI->nCCE[subframe] = dci_alloc->firstCCE;
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    LOG_T(PHY,"[eNB %"PRIu8"] Frame %d subframe %d : CCE resource for common DCI (SI)  => %"PRIu8"\n",eNB->Mod_id,frame,subframe,
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	  eNB->dlsch_SI->nCCE[subframe]);
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#if defined(SMBV) 
    
    // configure SI DCI
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    if (smbv_is_config_frame(frame) && (smbv_frame_cnt < 4)) {
      LOG_D(PHY,"[SMBV] Frame %3d, SI in SF %d DCI %"PRIu32"\n",frame,subframe,i);
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      smbv_configure_common_dci(smbv_fname,(smbv_frame_cnt*10) + (subframe), "SI", dci_alloc, i);
    }
    
#endif
    
    
  } else if (dci_alloc->ra_flag == 1) {  // This is format 1A allocation for RA
    // configure dlsch parameters and CCE index
    LOG_D(PHY,"Generating dlsch params for RA_RNTI\n");    
    generate_eNB_dlsch_params_from_dci(frame,
				       subframe,
				       &dci_alloc->dci_pdu[0],
				       dci_alloc->rnti,
				       dci_alloc->format,
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				       &eNB->dlsch_ra,
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				       fp,
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				       NULL,
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				       SI_RNTI,
				       dci_alloc->rnti,
				       P_RNTI,
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				       eNB->UE_stats[0].DL_pmi_single,
				       0);
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    eNB->dlsch_ra->nCCE[subframe] = dci_alloc->firstCCE;
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    LOG_D(PHY,"[eNB %"PRIu8"] Frame %d subframe %d : CCE resource for common DCI (RA)  => %"PRIu8"\n",eNB->Mod_id,frame,subframe,
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	  eNB->dlsch_ra->nCCE[subframe]);
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#if defined(SMBV) 
    
    // configure RA DCI
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    if (smbv_is_config_frame(frame) && (smbv_frame_cnt < 4)) {
      LOG_D(PHY,"[SMBV] Frame %3d, RA in SF %d DCI %"PRIu32"\n",frame,subframe,i);
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      smbv_configure_common_dci(smbv_fname,(smbv_frame_cnt*10) + (subframe), "RA", dci_alloc, i);
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    }
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#endif
    
  }
  
  else if ((dci_alloc->format != format0)&&
	   (dci_alloc->format != format3)&&
	   (dci_alloc->format != format3A)&&
	   (dci_alloc->format != format4)){ // this is a normal DLSCH allocation
    
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    if (UE_id>=0) {
#if defined(SMBV) 
      // Configure this user
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      if (smbv_is_config_frame(frame) && (smbv_frame_cnt < 4)) {
	LOG_D(PHY,"[SMBV] Frame %3d, SF %d (SMBV SF %d) Configuring user %d with RNTI %"PRIu16" in TM%"PRIu8"\n",frame,subframe,(smbv_frame_cnt*10) + (subframe),UE_id+1,
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              dci_alloc->rnti,eNB->transmission_mode[(uint8_t)UE_id]);
	smbv_configure_user(smbv_fname,UE_id+1,eNB->transmission_mode[(uint8_t)UE_id],dci_alloc->rnti);
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      }
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#endif
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      LOG_D(PHY,"Generating dlsch params for RNTI %x\n",dci_alloc->rnti);      
      generate_eNB_dlsch_params_from_dci(frame,
					 subframe,
					 &dci_alloc->dci_pdu[0],
					 dci_alloc->rnti,
					 dci_alloc->format,
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					 eNB->dlsch[(uint8_t)UE_id],
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					 fp,
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					 &eNB->pdsch_config_dedicated[UE_id],
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					 SI_RNTI,
					 0,
					 P_RNTI,
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					 eNB->UE_stats[(uint8_t)UE_id].DL_pmi_single,
					 eNB->transmission_mode[(uint8_t)UE_id]<7?0:eNB->transmission_mode[(uint8_t)UE_id]);
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      LOG_D(PHY,"[eNB %"PRIu8"][PDSCH %"PRIx16"/%"PRIu8"] Frame %d subframe %d: Generated dlsch params\n",
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	    eNB->Mod_id,dci_alloc->rnti,eNB->dlsch[(uint8_t)UE_id][0]->current_harq_pid,frame,subframe);
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      T(T_ENB_PHY_DLSCH_UE_DCI, T_INT(eNB->Mod_id), T_INT(frame), T_INT(subframe), T_INT(UE_id),
        T_INT(dci_alloc->rnti), T_INT(dci_alloc->format),
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        T_INT(eNB->dlsch[(int)UE_id][0]->current_harq_pid),
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        T_INT(eNB->dlsch[(int)UE_id][0]->harq_processes[eNB->dlsch[(int)UE_id][0]->current_harq_pid]->mcs),
        T_INT(eNB->dlsch[(int)UE_id][0]->harq_processes[eNB->dlsch[(int)UE_id][0]->current_harq_pid]->TBS));
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      eNB->dlsch[(uint8_t)UE_id][0]->nCCE[subframe] = dci_alloc->firstCCE;
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      LOG_D(PHY,"[eNB %"PRIu8"] Frame %d subframe %d : CCE resource for ue DCI (PDSCH %"PRIx16")  => %"PRIu8"\n",eNB->Mod_id,frame,subframe,
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	    dci_alloc->rnti,eNB->dlsch[(uint8_t)UE_id][0]->nCCE[subframe]);
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#if defined(SMBV) 
      
      // configure UE-spec DCI
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      if (smbv_is_config_frame(frame) && (smbv_frame_cnt < 4)) {
	LOG_D(PHY,"[SMBV] Frame %3d, PDSCH in SF %d DCI %"PRIu32"\n",frame,subframe,i);
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	smbv_configure_ue_spec_dci(smbv_fname,(smbv_frame_cnt*10) + (subframe), UE_id+1,dci_alloc, i);
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      }
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806
#endif
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      LOG_D(PHY,"[eNB %"PRIu8"][DCI][PDSCH %"PRIx16"] Frame %d subframe %d UE_id %"PRId8" Generated DCI format %d, aggregation %d\n",
	    eNB->Mod_id, dci_alloc->rnti,
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	    frame, subframe,UE_id,
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	    dci_alloc->format,
	    1<<dci_alloc->L);
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    } else {
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      LOG_D(PHY,"[eNB %"PRIu8"][PDSCH] Frame %d : No UE_id with corresponding rnti %"PRIx16", dropping DLSCH\n",
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	    eNB->Mod_id,frame,dci_alloc->rnti);
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    }
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  }
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}
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void generate_eNB_ulsch_params(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc,DCI_ALLOC_t *dci_alloc,const int UE_id) {
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823
  int harq_pid;
824
  LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
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  int frame = proc->frame_tx;
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  int subframe = proc->subframe_tx;
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  LOG_D(PHY,
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	"[eNB %"PRIu8"][PUSCH %"PRIu8"] Frame %d subframe %d UL Frame %"PRIu32", UL Subframe %"PRIu8", Generated ULSCH (format0) DCI (rnti %"PRIx16", dci %"PRIx8"), aggregation %d\n",
	eNB->Mod_id,
	subframe2harq_pid(fp,
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			  pdcch_alloc2ul_frame(fp,frame,subframe),
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			  pdcch_alloc2ul_subframe(fp,subframe)),
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	frame,
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	subframe,
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	pdcch_alloc2ul_frame(fp,frame,subframe),
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	pdcch_alloc2ul_subframe(fp,subframe),
	dci_alloc->rnti,
	dci_alloc->dci_pdu[0],
	1<<dci_alloc->L);
  
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  generate_eNB_ulsch_params_from_dci(eNB,
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				     proc,
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				     &dci_alloc->dci_pdu[0],
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				     dci_alloc->rnti,
				     format0,
				     UE_id,
				     SI_RNTI,
				     0,
				     P_RNTI,
				     CBA_RNTI,
				     0);  // do_srs
  
  LOG_T(PHY,"[eNB %"PRIu8"] Frame %d subframe %d : CCE resources for UE spec DCI (PUSCH %"PRIx16") => %d\n",
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	eNB->Mod_id,frame,subframe,dci_alloc->rnti,
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	dci_alloc->firstCCE);
  
#if defined(SMBV) 
  
  // configure UE-spec DCI for UL Grant
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  if (smbv_is_config_frame(frame) && (smbv_frame_cnt < 4)) {
    LOG_D(PHY,"[SMBV] Frame %3d, SF %d UL DCI %"PRIu32"\n",frame,subframe,i);
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    smbv_configure_ue_spec_dci(smbv_fname,(smbv_frame_cnt*10) + (subframe), UE_id+1, &DCI_pdu->dci_alloc[i], i);
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  }
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#endif
  
  
  // get the hard_pid for this subframe 
  harq_pid = subframe2harq_pid(fp,
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			       pdcch_alloc2ul_frame(fp,frame,subframe),
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			       pdcch_alloc2ul_subframe(fp,subframe));
  
  if (harq_pid==255) { // should not happen, log an error and exit, this is a fatal error
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    LOG_E(PHY,"[eNB %"PRIu8"] Frame %d: Bad harq_pid for ULSCH allocation\n",eNB->Mod_id,frame);
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    mac_xface->macphy_exit("FATAL\n"); 
  }
  
  if ((dci_alloc->rnti  >= CBA_RNTI) && (dci_alloc->rnti < P_RNTI))
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    eNB->ulsch[(uint32_t)UE_id]->harq_processes[harq_pid]->subframe_cba_scheduling_flag = 1;
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  else
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    eNB->ulsch[(uint32_t)UE_id]->harq_processes[harq_pid]->subframe_scheduling_flag = 1;
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  T(T_ENB_PHY_ULSCH_UE_DCI, T_INT(eNB->Mod_id), T_INT(frame), T_INT(subframe), T_INT(UE_id),
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    T_INT(dci_alloc->rnti), T_INT(harq_pid),
    T_INT(eNB->ulsch[(uint32_t)UE_id]->harq_processes[harq_pid]->mcs),
    T_INT(eNB->ulsch[(uint32_t)UE_id]->harq_processes[harq_pid]->round),
    T_INT(eNB->ulsch[(uint32_t)UE_id]->harq_processes[harq_pid]->first_rb),
    T_INT(eNB->ulsch[(uint32_t)UE_id]->harq_processes[harq_pid]->nb_rb),
    T_INT(eNB->ulsch[(uint32_t)UE_id]->harq_processes[harq_pid]->TBS));
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}
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void pdsch_procedures(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc,LTE_eNB_DLSCH_t *dlsch, LTE_eNB_DLSCH_t *dlsch1,LTE_eNB_UE_stats *ue_stats,int ra_flag,int num_pdcch_symbols) {
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  int frame=proc->frame_tx;
  int subframe=proc->subframe_tx;
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  int harq_pid = dlsch->current_harq_pid;
  LTE_DL_eNB_HARQ_t *dlsch_harq=dlsch->harq_processes[harq_pid];
  int input_buffer_length = dlsch_harq->TBS/8;
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  LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
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  uint8_t *DLSCH_pdu=NULL;
  uint8_t DLSCH_pdu_tmp[768*8];
  uint8_t DLSCH_pdu_rar[256];
  int i;
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  LOG_D(PHY,
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	"[eNB %"PRIu8"][PDSCH %"PRIx16"/%"PRIu8"] Frame %d, subframe %d: Generating PDSCH/DLSCH with input size = %"PRIu16", G %d, nb_rb %"PRIu16", mcs %"PRIu8", pmi_alloc %"PRIx64", rv %"PRIu8" (round %"PRIu8")\n",
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	eNB->Mod_id, dlsch->rnti,harq_pid,
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	frame, subframe, input_buffer_length,
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	get_G(fp,
	      dlsch_harq->nb_rb,
	      dlsch_harq->rb_alloc,
	      get_Qm(dlsch_harq->mcs),
	      dlsch_harq->Nl,
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	      num_pdcch_symbols,
	      frame,
	      subframe,
	      dlsch_harq->mimo_mode==TM7?7:0),
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	dlsch_harq->nb_rb,
	dlsch_harq->mcs,
	pmi2hex_2Ar1(dlsch_harq->pmi_alloc),
	dlsch_harq->rvidx,
	dlsch_harq->round);
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#if defined(MESSAGE_CHART_GENERATOR_PHY)
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  MSC_LOG_TX_MESSAGE(
		     MSC_PHY_ENB,MSC_PHY_UE,
		     NULL,0,
		     "%05u:%02u PDSCH/DLSCH input size = %"PRIu16", G %d, nb_rb %"PRIu16", mcs %"PRIu8", pmi_alloc %"PRIx16", rv %"PRIu8" (round %"PRIu8")",
		     frame, subframe,
		     input_buffer_length,
		     get_G(fp,
			   dlsch_harq->nb_rb,
			   dlsch_harq->rb_alloc,
			   get_Qm(dlsch_harq->mcs),
			   dlsch_harq->Nl,
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			   num_pdcch_symbols,
			   frame,
			   subframe,
			   dlsch_harq->mimo_mode==TM7?7:0),
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		     dlsch_harq->nb_rb,
		     dlsch_harq->mcs,
		     pmi2hex_2Ar1(dlsch_harq->pmi_alloc),
		     dlsch_harq->rvidx,
		     dlsch_harq->round);
#endif

  if (ue_stats) ue_stats->dlsch_sliding_cnt++;

  if (dlsch_harq->round == 0) {

    if (ue_stats)
      ue_stats->dlsch_trials[harq_pid][0]++;
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    if (eNB->mac_enabled==1) {
      if (ra_flag == 0) {
	DLSCH_pdu = mac_xface->get_dlsch_sdu(eNB->Mod_id,
					     eNB->CC_id,
					     frame,
					     dlsch->rnti,
					     0);
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      }
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      else {
	int16_t crnti = mac_xface->fill_rar(eNB->Mod_id,
					    eNB->CC_id,
					    frame,
					    DLSCH_pdu_rar,
					    fp->N_RB_UL,
					    input_buffer_length);
	DLSCH_pdu = DLSCH_pdu_rar;

	int UE_id;

	if (crnti!=0) 
	  UE_id = add_ue(crnti,eNB);
	else 
	  UE_id = -1;
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	if (UE_id==-1) {
	  LOG_W(PHY,"[eNB] Max user count reached.\n");
	  mac_xface->cancel_ra_proc(eNB->Mod_id,
				    eNB->CC_id,
				    frame,
				    crnti);
	} else {
	  eNB->UE_stats[(uint32_t)UE_id].mode = RA_RESPONSE;
	  // Initialize indicator for first SR (to be cleared after ConnectionSetup is acknowledged)
	  eNB->first_sr[(uint32_t)UE_id] = 1;
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	  generate_eNB_ulsch_params_from_rar(DLSCH_pdu,
					     frame,
					     (subframe),
					     eNB->ulsch[(uint32_t)UE_id],
					     fp);
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	  eNB->ulsch[(uint32_t)UE_id]->Msg3_active = 1;
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	  get_Msg3_alloc(fp,
			 subframe,
			 frame,
			 &eNB->ulsch[(uint32_t)UE_id]->Msg3_frame,
			 &eNB->ulsch[(uint32_t)UE_id]->Msg3_subframe);
	  LOG_D(PHY,"[eNB][RAPROC] Frame %d subframe %d, Activated Msg3 demodulation for UE %"PRId8" in frame %"PRIu32", subframe %"PRIu8"\n",
		frame,
		subframe,
		UE_id,
		eNB->ulsch[(uint32_t)UE_id]->Msg3_frame,
		eNB->ulsch[(uint32_t)UE_id]->Msg3_subframe);
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          /* TODO: get rid of this hack. The problem is that the eNodeB may
           * sometimes wrongly generate PHICH because somewhere 'phich_active' was
           * not reset to 0, due to an unidentified reason. When adding this
           * resetting here the problem seems to disappear completely.
           */
          LOG_D(PHY, "hack: set phich_active to 0 for UE %d fsf %d %d all HARQs\n", UE_id, frame, subframe);
          for (i = 0; i < 8; i++)
            eNB->ulsch[(uint32_t)UE_id]->harq_processes[i]->phich_active = 0;

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          mac_xface->set_msg3_subframe(eNB->Mod_id, eNB->CC_id, frame, subframe, (uint16_t)crnti,
                                       eNB->ulsch[UE_id]->Msg3_frame, eNB->ulsch[UE_id]->Msg3_subframe);

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          T(T_ENB_PHY_MSG3_ALLOCATION, T_INT(eNB->Mod_id), T_INT(frame), T_INT(subframe),
            T_INT(UE_id), T_INT((uint16_t)crnti), T_INT(1 /* 1 is for initial transmission*/),
            T_INT(eNB->ulsch[UE_id]->Msg3_frame), T_INT(eNB->ulsch[UE_id]->Msg3_subframe));
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	}
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	if (ue_stats) ue_stats->total_TBS_MAC += dlsch_harq->TBS;
      }
    }
    else {
      DLSCH_pdu = DLSCH_pdu_tmp;
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      for (i=0; i<input_buffer_length; i++)
	DLSCH_pdu[i] = (unsigned char)(taus()&0xff);
    }
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#if defined(SMBV) 
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    // Configures the data source of allocation (allocation is configured by DCI)
    if (smbv_is_config_frame(frame) && (smbv_frame_cnt < 4)) {
      LOG_D(PHY,"[SMBV] Frame %3d, Configuring PDSCH payload in SF %d alloc %"PRIu8"\n",frame,(smbv_frame_cnt*10) + (subframe),smbv_alloc_cnt);
      //          smbv_configure_datalist_for_user(smbv_fname, find_ue(dlsch->rnti,eNB)+1, DLSCH_pdu, input_buffer_length);
    }
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#endif
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#ifdef DEBUG_PHY_PROC
#ifdef DEBUG_DLSCH
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    LOG_T(PHY,"eNB DLSCH SDU: \n");
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    //eNB->dlsch[(uint8_t)UE_id][0]->nCCE[subframe] = DCI_pdu->dci_alloc[i].firstCCE;
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    LOG_D(PHY,"[eNB %"PRIu8"] Frame %d subframe %d : CCE resource for ue DCI (PDSCH %"PRIx16")  => %"PRIu8"/%u\n",eNB->Mod_id,eNB->proc[sched_subframe].frame_tx,subframe,
	  DCI_pdu->dci_alloc[i].rnti,eNB->dlsch[(uint8_t)UE_id][0]->nCCE[subframe],DCI_pdu->dci_alloc[i].firstCCE);
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    for (i=0; i<dlsch_harq->TBS>>3; i++)
      LOG_T(PHY,"%"PRIx8".",DLSCH_pdu[i]);
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    LOG_T(PHY,"\n");
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#endif
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#endif
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  } else {
    ue_stats->dlsch_trials[harq_pid][dlsch_harq->round]++;
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#ifdef DEBUG_PHY_PROC
#ifdef DEBUG_DLSCH
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    LOG_D(PHY,"[eNB] This DLSCH is a retransmission\n");
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#endif
#endif
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  }
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  if (eNB->abstraction_flag==0) {
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    LOG_D(PHY,"Generating DLSCH/PDSCH %d\n",ra_flag);
    // 36-212
    start_meas(&eNB->dlsch_encoding_stats);
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    eNB->te(eNB,
	    DLSCH_pdu,
	    num_pdcch_symbols,
	    dlsch,
	    frame,subframe,
	    &eNB->dlsch_rate_matching_stats,
	    &eNB->dlsch_turbo_encoding_stats,
	    &eNB->dlsch_interleaving_stats);
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    stop_meas(&eNB->dlsch_encoding_stats);
    // 36-211
    start_meas(&eNB->dlsch_scrambling_stats);
    dlsch_scrambling(fp,
		     0,
		     dlsch,
		     get_G(fp,
			   dlsch_harq->nb_rb,
			   dlsch_harq->rb_alloc,
			   get_Qm(dlsch_harq->mcs),
			   dlsch_harq->Nl,
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			   num_pdcch_symbols,
			   frame,subframe,
			   0),
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		     0,
		     subframe<<1);
    stop_meas(&eNB->dlsch_scrambling_stats);
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    start_meas(&eNB->dlsch_modulation_stats);


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    dlsch_modulation(eNB,
		     eNB->common_vars.txdataF[0],
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		     AMP,
		     subframe,
		     num_pdcch_symbols,
		     dlsch,
		     dlsch1);
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    stop_meas(&eNB->dlsch_modulation_stats);
  }
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#ifdef PHY_ABSTRACTION
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  else {
    start_meas(&eNB->dlsch_encoding_stats);
    dlsch_encoding_emul(eNB,
			DLSCH_pdu,
			dlsch);
    stop_meas(&eNB->dlsch_encoding_stats);
  }
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#endif
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  dlsch->active = 0;
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}
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void phy_procedures_eNB_TX(PHY_VARS_eNB *eNB,
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			   eNB_rxtx_proc_t *proc,
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                           relaying_type_t r_type,
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			   PHY_VARS_RN *rn,
			   int do_meas)
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{
  UNUSED(rn);
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  int frame=proc->frame_tx;
  int subframe=proc->subframe_tx;
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  //  uint16_t input_buffer_length;
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  uint32_t i,j,aa;
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  uint8_t harq_pid;
  DCI_PDU *DCI_pdu;
  DCI_PDU DCI_pdu_tmp;
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  int8_t UE_id=0;
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  uint8_t num_pdcch_symbols=0;
  uint8_t ul_subframe;
  uint32_t ul_frame;
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  LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
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  DCI_ALLOC_t *dci_alloc=(DCI_ALLOC_t *)NULL;
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  int offset = eNB->CC_id;//proc == &eNB->proc.proc_rxtx[0] ? 0 : 1;
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#if defined(SMBV) 
  // counts number of allocations in subframe
  // there is at least one allocation for PDCCH
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  uint8_t smbv_alloc_cnt = 1;Exiting eNB thread RXn_TXnp4
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#endif
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  if ((fp->frame_type == TDD) && (subframe_select(fp,subframe)==SF_UL)) return;
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  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_ENB_TX+offset,1);
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  if (do_meas==1) start_meas(&eNB->phy_proc_tx);
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  T(T_ENB_PHY_DL_TICK, T_INT(eNB->Mod_id), T_INT(frame), T_INT(subframe));
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  for (i=0; i<NUMBER_OF_UE_MAX; i++) {
    // If we've dropped the UE, go back to PRACH mode for this UE
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    if ((frame==0)&&(subframe==0)) {
      if (eNB->UE_stats[i].crnti > 0) {
	LOG_I(PHY,"UE %d : rnti %x\n",i,eNB->UE_stats[i].crnti);
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      }
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    }
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    if (eNB->UE_stats[i].ulsch_consecutive_errors == ULSCH_max_consecutive_errors) {
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      LOG_W(PHY,"[eNB %d, CC %d] frame %d, subframe %d, UE %d: ULSCH consecutive error count reached %u, triggering UL Failure\n",
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            eNB->Mod_id,eNB->CC_id,frame,subframe, i, eNB->UE_stats[i].ulsch_consecutive_errors);
      eNB->UE_stats[i].ulsch_consecutive_errors=0;
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      mac_xface->UL_failure_indication(eNB->Mod_id,
				       eNB->CC_id,
				       frame,
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				       eNB->UE_stats[i].crnti,
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				       subframe);
				       
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    }
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  }
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  // Get scheduling info for next subframe
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  // This is called only for the CC_id = 0 and triggers scheduling for all CC_id's
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  if (eNB->mac_enabled==1) {
    if (eNB->CC_id == 0) {
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      mac_xface->eNB_dlsch_ulsch_scheduler(eNB->Mod_id,0,frame,subframe);//,1);
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    }
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  }
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  // clear the transmit data array for the current subframe
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  if (eNB->abstraction_flag==0) {
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    for (aa=0; aa<fp->nb_antenna_ports_eNB; aa++) {      
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      memset(&eNB->common_vars.txdataF[0][aa][subframe*fp->ofdm_symbol_size*(fp->symbols_per_tti)],
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             0,fp->ofdm_symbol_size*(fp->symbols_per_tti)*sizeof(int32_t));
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    }
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  }
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  if (is_pmch_subframe(frame,subframe,fp)) {
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    pmch_procedures(eNB,proc,rn,r_type);
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  }
  else {
    // this is not a pmch subframe, so generate PSS/SSS/PBCH
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    common_signal_procedures(eNB,proc);
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  }
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1216
#if defined(SMBV) 
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  // PBCH takes one allocation
1219
  if (smbv_is_config_frame(frame) && (smbv_frame_cnt < 4)) {
1220
    if (subframe==0)
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      smbv_alloc_cnt++;
  }
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1224
#endif
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  if (eNB->mac_enabled==1) {
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    // Parse DCI received from MAC
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_PDCCH_TX,1);
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    DCI_pdu = mac_xface->get_dci_sdu(eNB->Mod_id,
				     eNB->CC_id,
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				     frame,
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				     subframe);
  }
  else {
    DCI_pdu = &DCI_pdu_tmp;
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#ifdef EMOS_CHANNEL
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    fill_dci_emos(DCI_pdu,eNB);
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#else
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    fill_dci(DCI_pdu,eNB,proc);
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    // clear previous allocation information for all UEs
    for (i=0; i<NUMBER_OF_UE_MAX; i++) {
      if (eNB->dlsch[i][0]){
        for (j=0; j<8; j++)
          eNB->dlsch[i][0]->harq_processes[j]->round = 0;
      }
    }

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#endif
1249
  }
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  // clear existing ulsch dci allocations before applying info from MAC  (this is table
1252
  ul_subframe = pdcch_alloc2ul_subframe(fp,subframe);
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  ul_frame = pdcch_alloc2ul_frame(fp,frame,subframe);
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  if ((subframe_select(fp,ul_subframe)==SF_UL) ||
      (fp->frame_type == FDD)) {
    harq_pid = subframe2harq_pid(fp,ul_frame,ul_subframe);
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    // clear DCI allocation maps for new subframe
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    for (i=0; i<NUMBER_OF_UE_MAX; i++)
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      if (eNB->ulsch[i]) {
        eNB->ulsch[i]->harq_processes[harq_pid]->dci_alloc=0;
        eNB->ulsch[i]->harq_processes[harq_pid]->rar_alloc=0;
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      }
  }
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  // clear previous allocation information for all UEs
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  for (i=0; i<NUMBER_OF_UE_MAX; i++) {
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    if (eNB->dlsch[i][0])
      eNB->dlsch[i][0]->subframe_tx[subframe] = 0;
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  }
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  /* save old HARQ information needed for PHICH generation */
  for (i=0; i<NUMBER_OF_UE_MAX; i++) {
    if (eNB->ulsch[i]) {
      /* Store first_rb and n_DMRS for correct PHICH generation below.
       * For PHICH generation we need "old" values of last scheduling
       * for this HARQ process. 'generate_eNB_dlsch_params' below will
       * overwrite first_rb and n_DMRS and 'generate_phich_top', done
       * after 'generate_eNB_dlsch_params', would use the "new" values
       * instead of the "old" ones.
       *
       * This has been tested for FDD only, may be wrong for TDD.
       *
       * TODO: maybe we should restructure the code to be sure it
       *       is done correctly. The main concern is if the code
       *       changes and first_rb and n_DMRS are modified before
       *       we reach here, then the PHICH processing will be wrong,
       *       using wrong first_rb and n_DMRS values to compute
       *       ngroup_PHICH and nseq_PHICH.
       *
       * TODO: check if that works with TDD.
       */
      if ((subframe_select(fp,ul_subframe)==SF_UL) ||
          (fp->frame_type == FDD)) {
        harq_pid = subframe2harq_pid(fp,ul_frame,ul_subframe);
        eNB->ulsch[i]->harq_processes[harq_pid]->previous_first_rb =
            eNB->ulsch[i]->harq_processes[harq_pid]->first_rb;
        eNB->ulsch[i]->harq_processes[harq_pid]->previous_n_DMRS =
            eNB->ulsch[i]->harq_processes[harq_pid]->n_DMRS;
      }
    }
  }

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  num_pdcch_symbols = DCI_pdu->num_pdcch_symbols;
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  LOG_D(PHY,"num_pdcch_symbols %"PRIu8",(dci common %"PRIu8", dci uespec %"PRIu8"\n",num_pdcch_symbols,
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        DCI_pdu->Num_common_dci,DCI_pdu->Num_ue_spec_dci);

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#if defined(SMBV) 
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  // Sets up PDCCH and DCI table
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  if (smbv_is_config_frame(frame) && (smbv_frame_cnt < 4) && ((DCI_pdu->Num_common_dci+DCI_pdu->Num_ue_spec_dci)>0)) {
    LOG_D(PHY,"[SMBV] Frame %3d, SF %d PDCCH, number of DCIs %d\n",frame,subframe,DCI_pdu->Num_common_dci+DCI_pdu->Num_ue_spec_dci);
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    dump_dci(fp,&DCI_pdu->dci_alloc[0]);
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    smbv_configure_pdcch(smbv_fname,(smbv_frame_cnt*10) + (subframe),num_pdcch_symbols,DCI_pdu->Num_common_dci+DCI_pdu->Num_ue_spec_dci);
  }
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#endif

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  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_DCI_INFO,DCI_pdu->num_pdcch_symbols);

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  // loop over all DCIs for this subframe to generate DLSCH allocations
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  for (i=0; i<DCI_pdu->Num_common_dci + DCI_pdu->Num_ue_spec_dci ; i++) {
    LOG_D(PHY,"[eNB] Subframe %d: DCI %d/%d : rnti %x, CCEind %d\n",subframe,i,DCI_pdu->Num_common_dci+DCI_pdu->Num_ue_spec_dci,DCI_pdu->dci_alloc[i].rnti,DCI_pdu->dci_alloc[i].firstCCE);
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_DCI_INFO,DCI_pdu->dci_alloc[i].rnti);
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_DCI_INFO,DCI_pdu->dci_alloc[i].format);
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_DCI_INFO,DCI_pdu->dci_alloc[i].firstCCE);
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    dci_alloc = &DCI_pdu->dci_alloc[i];
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    if ((dci_alloc->rnti<= P_RNTI) && 
	(dci_alloc->ra_flag!=1)) {
      if (eNB->mac_enabled==1)
	UE_id = find_ue((int16_t)dci_alloc->rnti,eNB);
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      else
	UE_id = i;
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    }
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    else UE_id=0;
    
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    generate_eNB_dlsch_params(eNB,proc,dci_alloc,UE_id);
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  }
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  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_DCI_INFO,(frame*10)+subframe);

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1344
  // Apply physicalConfigDedicated if needed
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  // This is for UEs that have received this IE, which changes these DL and UL configuration, we apply after a delay for the eNodeB UL parameters
  phy_config_dedicated_eNB_step2(eNB);
  
  // Now loop again over the DCIs for UL configuration
1349
  for (i=0; i<DCI_pdu->Num_common_dci + DCI_pdu->Num_ue_spec_dci ; i++) {
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    dci_alloc = &DCI_pdu->dci_alloc[i];
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    if (dci_alloc->format == format0) {  // this is a ULSCH allocation
      if (eNB->mac_enabled==1)
	UE_id = find_ue((int16_t)dci_alloc->rnti,eNB);
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      else
	UE_id = i;
1357
      
1358
      if (UE_id<0) { // should not happen, log an error and exit, this is a fatal error
1359
	LOG_E(PHY,"[eNB %"PRIu8"] Frame %d: Unknown UE_id for rnti %"PRIx16"\n",eNB->Mod_id,frame,dci_alloc->rnti);
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	mac_xface->macphy_exit("FATAL\n"); 
1361
      }
1362
      generate_eNB_ulsch_params(eNB,proc,dci_alloc,UE_id);
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    }
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  }
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  // if we have DCI to generate do it now
  if ((DCI_pdu->Num_common_dci + DCI_pdu->Num_ue_spec_dci)>0) {
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  } else { // for emulation!!
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    eNB->num_ue_spec_dci[(subframe)&1]=0;
    eNB->num_common_dci[(subframe)&1]=0;
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  }
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1379
  if (eNB->abstraction_flag == 0) {
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1381
    if (DCI_pdu->Num_ue_spec_dci+DCI_pdu->Num_common_dci > 0) {
1382
      LOG_D(PHY,"[eNB %"PRIu8"] Frame %d, subframe %d: Calling generate_dci_top (pdcch) (common %"PRIu8",ue_spec %"PRIu8")\n",eNB->Mod_id,frame, subframe,
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            DCI_pdu->Num_common_dci,DCI_pdu->Num_ue_spec_dci);
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    }

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    num_pdcch_symbols = generate_dci_top(DCI_pdu->Num_ue_spec_dci,
                                         DCI_pdu->Num_common_dci,
                                         DCI_pdu->dci_alloc,
                                         0,
                                         AMP,
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                                         fp,
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                                         eNB->common_vars.txdataF[0],
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                                         subframe);
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  }
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#ifdef PHY_ABSTRACTION // FIXME this ifdef seems suspicious
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  else {
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    LOG_D(PHY,"[eNB %"PRIu8"] Frame %d, subframe %d: Calling generate_dci_to_emul\n",eNB->Mod_id,frame, subframe);
1401
    num_pdcch_symbols = generate_dci_top_emul(eNB,DCI_pdu->Num_ue_spec_dci,DCI_pdu->Num_common_dci,DCI_pdu->dci_alloc,subframe);
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  }
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#endif

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  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_PDCCH_TX,0);
1407

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1408
  // Check for SI activity
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  if ((eNB->dlsch_SI) && (eNB->dlsch_SI->active == 1)) {
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    pdsch_procedures(eNB,proc,eNB->dlsch_SI,(LTE_eNB_DLSCH_t*)NULL,(LTE_eNB_UE_stats*)NULL,0,num_pdcch_symbols);
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1414
#if defined(SMBV) 
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    // Configures the data source of allocation (allocation is configured by DCI)
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    if (smbv_is_config_frame(frame) && (smbv_frame_cnt < 4)) {
      LOG_D(PHY,"[SMBV] Frame %3d, Configuring SI payload in SF %d alloc %"PRIu8"\n",frame,(smbv_frame_cnt*10) + (subframe),smbv_alloc_cnt);
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      smbv_configure_datalist_for_alloc(smbv_fname, smbv_alloc_cnt++, (smbv_frame_cnt*10) + (subframe), DLSCH_pdu, input_buffer_length);
    }
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#endif
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  }
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  // Check for RA activity
1426
  if ((eNB->dlsch_ra) && (eNB->dlsch_ra->active == 1)) {
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1428
#if defined(SMBV) 
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    // Configures the data source of allocation (allocation is configured by DCI)
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    if (smbv_is_config_frame(frame) && (smbv_frame_cnt < 4)) {
      LOG_D(PHY,"[SMBV] Frame %3d, Configuring RA payload in SF %d alloc %"PRIu8"\n",frame,(smbv_frame_cnt*10) + (subframe),smbv_alloc_cnt);
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      smbv_configure_datalist_for_alloc(smbv_fname, smbv_alloc_cnt++, (smbv_frame_cnt*10) + (subframe), dlsch_input_buffer, input_buffer_length);
    }
    
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#endif
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    LOG_D(PHY,"[eNB %"PRIu8"][RAPROC] Frame %d, subframe %d: Calling generate_dlsch (RA),Msg3 frame %"PRIu32", Msg3 subframe %"PRIu8"\n",
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	  eNB->Mod_id,
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	  frame, subframe,
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	  eNB->ulsch[(uint32_t)UE_id]->Msg3_frame,
	  eNB->ulsch[(uint32_t)UE_id]->Msg3_subframe);
1444
    
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    pdsch_procedures(eNB,proc,eNB->dlsch_ra,(LTE_eNB_DLSCH_t*)NULL,(LTE_eNB_UE_stats*)NULL,1,num_pdcch_symbols);
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    eNB->dlsch_ra->active = 0;
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  }
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  // Now scan UE specific DLSCH
1452
  for (UE_id=0; UE_id<NUMBER_OF_UE_MAX; UE_id++)
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    {
      if ((eNB->dlsch[(uint8_t)UE_id][0])&&
	  (eNB->dlsch[(uint8_t)UE_id][0]->rnti>0)&&
	  (eNB->dlsch[(uint8_t)UE_id][0]->active == 1)) {
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	pdsch_procedures(eNB,proc,eNB->dlsch[(uint8_t)UE_id][0],eNB->dlsch[(uint8_t)UE_id][1],&eNB->UE_stats[(uint32_t)UE_id],0,num_pdcch_symbols);
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      }
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      else if ((eNB->dlsch[(uint8_t)UE_id][0])&&
	       (eNB->dlsch[(uint8_t)UE_id][0]->rnti>0)&&
	       (eNB->dlsch[(uint8_t)UE_id][0]->active == 0)) {
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	// clear subframe TX flag since UE is not scheduled for PDSCH in this subframe (so that we don't look for PUCCH later)
	eNB->dlsch[(uint8_t)UE_id][0]->subframe_tx[subframe]=0;
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      }
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    }
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  // if we have PHICH to generate
1475

1476
  if (is_phich_subframe(fp,subframe))
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    {
      generate_phich_top(eNB,
			 proc,
			 AMP,
1481
			 0);
1482
    }
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  /*
  if (frame>=10 && subframe>=9) {
    write_output("/tmp/txsigF0.m","txsF0", &eNB->common_vars.txdataF[0][0][0],120*eNB->frame_parms.ofdm_symbol_size,1,1);
    write_output("/tmp/txsigF1.m","txsF1", &eNB->common_vars.txdataF[0][0][0],120*eNB->frame_parms.ofdm_symbol_size,1,1);
    abort();
  }
  */
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1492
#ifdef EMOS
1493
  phy_procedures_emos_eNB_TX(subframe, eNB);
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#endif
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1496
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_ENB_TX+offset,0);
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  if (do_meas==1) stop_meas(&eNB->phy_proc_tx);
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}

1501
void process_Msg3(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc,uint8_t UE_id, uint8_t harq_pid)
1502
{
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  // this prepares the demodulation of the first PUSCH of a new user, containing Msg3
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  int subframe = proc->subframe_rx;
  int frame = proc->frame_rx;
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  LOG_D(PHY,"[eNB %d][RAPROC] frame %d : subframe %d : process_Msg3 UE_id %d (active %d, subframe %d, frame %d)\n",
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        eNB->Mod_id,
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        frame,subframe,
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        UE_id,eNB->ulsch[(uint32_t)UE_id]->Msg3_active,
        eNB->ulsch[(uint32_t)UE_id]->Msg3_subframe,
        eNB->ulsch[(uint32_t)UE_id]->Msg3_frame);
  eNB->ulsch[(uint32_t)UE_id]->Msg3_flag = 0;
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  if ((eNB->ulsch[(uint32_t)UE_id]->Msg3_active == 1) &&
      (eNB->ulsch[(uint32_t)UE_id]->Msg3_subframe == subframe) &&
      (eNB->ulsch[(uint32_t)UE_id]->Msg3_frame == (uint32_t)frame))   {
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    //    harq_pid = 0;
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    eNB->ulsch[(uint32_t)UE_id]->Msg3_active = 0;
    eNB->ulsch[(uint32_t)UE_id]->Msg3_flag = 1;
    eNB->ulsch[(uint32_t)UE_id]->harq_processes[harq_pid]->subframe_scheduling_flag=1;
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    LOG_D(PHY,"[eNB %d][RAPROC] frame %d, subframe %d: Setting subframe_scheduling_flag (Msg3) for UE %d\n",
1525
          eNB->Mod_id,
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          frame,subframe,UE_id);
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  }
}


// This function retrieves the harq_pid of the corresponding DLSCH process
// and updates the error statistics of the DLSCH based on the received ACK
// info from UE along with the round index.  It also performs the fine-grain
// rate-adaptation based on the error statistics derived from the ACK/NAK process

1536
void process_HARQ_feedback(uint8_t UE_id,
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                           PHY_VARS_eNB *eNB,
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			   eNB_rxtx_proc_t *proc,
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                           uint8_t pusch_flag,
                           uint8_t *pucch_payload,
                           uint8_t pucch_sel,
                           uint8_t SR_payload)
{
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1545
  LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
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1546
  uint8_t dl_harq_pid[8],dlsch_ACK[8],dl_subframe;
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  LTE_eNB_DLSCH_t *dlsch             =  eNB->dlsch[(uint32_t)UE_id][0];
  LTE_eNB_UE_stats *ue_stats         =  &eNB->UE_stats[(uint32_t)UE_id];
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  LTE_DL_eNB_HARQ_t *dlsch_harq_proc;
1550
  uint8_t subframe_m4,M,m;
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  int mp;
  int all_ACKed=1,nb_alloc=0,nb_ACK=0;
1553 1554
  int frame = proc->frame_rx;
  int subframe = proc->subframe_rx;
1555
  int harq_pid = subframe2harq_pid( fp,frame,subframe);
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1557
  if (fp->frame_type == FDD) { //FDD
1558
    subframe_m4 = (subframe<4) ? subframe+6 : subframe-4;
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1560 1561
    dl_harq_pid[0] = dlsch->harq_ids[subframe_m4];
    M=1;
1562

1563
    if (pusch_flag == 1) {
1564
      dlsch_ACK[0] = eNB->ulsch[(uint8_t)UE_id]->harq_processes[harq_pid]->o_ACK[0];
1565
      if (dlsch->subframe_tx[subframe_m4]==1)
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	LOG_D(PHY,"[eNB %d] Frame %d: Received ACK/NAK %d on PUSCH for subframe %d\n",eNB->Mod_id,
	      frame,dlsch_ACK[0],subframe_m4);
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    }
    else {
1570
      dlsch_ACK[0] = pucch_payload[0];
1571
      LOG_D(PHY,"[eNB %d] Frame %d: Received ACK/NAK %d on PUCCH for subframe %d\n",eNB->Mod_id,
1572
	    frame,dlsch_ACK[0],subframe_m4);
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      /*
1574
	if (dlsch_ACK[0]==0)
1575
	AssertFatal(0,"Exiting on NAK on PUCCH\n");
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      */
1577
    }
1578

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#if defined(MESSAGE_CHART_GENERATOR_PHY)
    MSC_LOG_RX_MESSAGE(
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		       MSC_PHY_ENB,MSC_PHY_UE,
		       NULL,0,
		       "%05u:%02u %s received %s  rnti %x harq id %u  tx SF %u",
		       frame,subframe,
		       (pusch_flag == 1)?"PUSCH":"PUCCH",
		       (dlsch_ACK[0])?"ACK":"NACK",
		       dlsch->rnti,
		       dl_harq_pid[0],
		       subframe_m4
		       );
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#endif
1593 1594
  } else { // TDD Handle M=1,2 cases only

1595
    M=ul_ACK_subframe2_M(fp,
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                         subframe);

1598 1599 1600 1601 1602 1603 1604 1605
    // Now derive ACK information for TDD
    if (pusch_flag == 1) { // Do PUSCH ACK/NAK first
      // detect missing DAI
      //FK: this code is just a guess
      //RK: not exactly, yes if scheduled from PHICH (i.e. no DCI format 0)
      //    otherwise, it depends on how many of the PDSCH in the set are scheduled, we can leave it like this,
      //    but we have to adapt the code below.  For example, if only one out of 2 are scheduled, only 1 bit o_ACK is used

1606
      dlsch_ACK[0] = eNB->ulsch[(uint8_t)UE_id]->harq_processes[harq_pid]->o_ACK[0];
1607
      dlsch_ACK[1] = (eNB->pucch_config_dedicated[UE_id].tdd_AckNackFeedbackMode == bundling)
1608
	?eNB->ulsch[(uint8_t)UE_id]->harq_processes[harq_pid]->o_ACK[0]:eNB->ulsch[(uint8_t)UE_id]->harq_processes[harq_pid]->o_ACK[1];
1609
    }
1610

1611
    else {  // PUCCH ACK/NAK
1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646
      if ((SR_payload == 1)&&(pucch_sel!=2)) {  // decode Table 7.3 if multiplexing and SR=1
        nb_ACK = 0;

        if (M == 2) {
          if ((pucch_payload[0] == 1) && (pucch_payload[1] == 1)) // b[0],b[1]
            nb_ACK = 1;
          else if ((pucch_payload[0] == 1) && (pucch_payload[1] == 0))
            nb_ACK = 2;
        } else if (M == 3) {
          if ((pucch_payload[0] == 1) && (pucch_payload[1] == 1))
            nb_ACK = 1;
          else if ((pucch_payload[0] == 1) && (pucch_payload[1] == 0))
            nb_ACK = 2;
          else if ((pucch_payload[0] == 0) && (pucch_payload[1] == 1))
            nb_ACK = 3;
        }
      } else if (pucch_sel == 2) { // bundling or M=1
        dlsch_ACK[0] = pucch_payload[0];
        dlsch_ACK[1] = pucch_payload[0];
      } else { // multiplexing with no SR, this is table 10.1
        if (M==1)
          dlsch_ACK[0] = pucch_payload[0];
        else if (M==2) {
          if (((pucch_sel == 1) && (pucch_payload[0] == 1) && (pucch_payload[1] == 1)) ||
              ((pucch_sel == 0) && (pucch_payload[0] == 0) && (pucch_payload[1] == 1)))
            dlsch_ACK[0] = 1;
          else
            dlsch_ACK[0] = 0;

          if (((pucch_sel == 1) && (pucch_payload[0] == 1) && (pucch_payload[1] == 1)) ||
              ((pucch_sel == 1) && (pucch_payload[0] == 0) && (pucch_payload[1] == 0)))
            dlsch_ACK[1] = 1;
          else
            dlsch_ACK[1] = 0;
        }
1647
      }
1648
    }
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  }

  // handle case where positive SR was transmitted with multiplexing
  if ((SR_payload == 1)&&(pucch_sel!=2)&&(pusch_flag == 0)) {
1653
    nb_alloc = 0;
1654 1655

    for (m=0; m<M; m++) {
1656
      dl_subframe = ul_ACK_subframe2_dl_subframe(fp,
1657 1658
						 subframe,
						 m);
1659 1660 1661

      if (dlsch->subframe_tx[dl_subframe]==1)
        nb_alloc++;
1662
    }
1663

1664 1665
    if (nb_alloc == nb_ACK)
      all_ACKed = 1;
1666
    else
1667
      all_ACKed = 0;
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  }


1671
  for (m=0,mp=-1; m<M; m++) {
1672

1673
    dl_subframe = ul_ACK_subframe2_dl_subframe(fp,
1674 1675
					       subframe,
					       m);
1676

1677 1678
    if (dlsch->subframe_tx[dl_subframe]==1) {
      if (pusch_flag == 1)
1679
        mp++;
1680
      else
1681
        mp = m;
1682

1683
      dl_harq_pid[m]     = dlsch->harq_ids[dl_subframe];
1684
      harq_pid_updated[UE_id][dl_harq_pid[m]] = 1;
1685

1686
      if ((pucch_sel != 2)&&(pusch_flag == 0)) { // multiplexing
1687 1688 1689 1690
        if ((SR_payload == 1)&&(all_ACKed == 1))
          dlsch_ACK[m] = 1;
        else
          dlsch_ACK[m] = 0;
1691
      }
1692

1693
      if (dl_harq_pid[m]<dlsch->Mdlharq) {
1694 1695
        dlsch_harq_proc = dlsch->harq_processes[dl_harq_pid[m]];
#ifdef DEBUG_PHY_PROC
1696
        LOG_D(PHY,"[eNB %d][PDSCH %x/%d] subframe %d, status %d, round %d (mcs %d, rv %d, TBS %d)\n",eNB->Mod_id,
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              dlsch->rnti,dl_harq_pid[m],dl_subframe,
              dlsch_harq_proc->status,dlsch_harq_proc->round,
              dlsch->harq_processes[dl_harq_pid[m]]->mcs,
              dlsch->harq_processes[dl_harq_pid[m]]->rvidx,
              dlsch->harq_processes[dl_harq_pid[m]]->TBS);

        if (dlsch_harq_proc->status==DISABLED)
          LOG_E(PHY,"dlsch_harq_proc is disabled? \n");

1706
#endif
1707 1708 1709 1710 1711 1712 1713 1714

        if ((dl_harq_pid[m]<dlsch->Mdlharq) &&
            (dlsch_harq_proc->status == ACTIVE)) {
          // dl_harq_pid of DLSCH is still active

          if ( dlsch_ACK[mp]==0) {
            // Received NAK
#ifdef DEBUG_PHY_PROC
1715
            LOG_D(PHY,"[eNB %d][PDSCH %x/%d] M = %d, m= %d, mp=%d NAK Received in round %d, requesting retransmission\n",eNB->Mod_id,
1716
                  dlsch->rnti,dl_harq_pid[m],M,m,mp,dlsch_harq_proc->round);
1717
#endif
1718

1719
            T(T_ENB_PHY_DLSCH_UE_NACK, T_INT(eNB->Mod_id), T_INT(frame), T_INT(subframe), T_INT(UE_id), T_INT(dlsch->rnti),
1720
              T_INT(dl_harq_pid[m]));
1721

1722 1723 1724 1725 1726 1727 1728 1729 1730
            if (dlsch_harq_proc->round == 0)
              ue_stats->dlsch_NAK_round0++;

            ue_stats->dlsch_NAK[dl_harq_pid[m]][dlsch_harq_proc->round]++;


            // then Increment DLSCH round index
            dlsch_harq_proc->round++;

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1732
            if (dlsch_harq_proc->round == dlsch->Mlimit) {
1733 1734
              // This was the last round for DLSCH so reset round and increment l2_error counter
#ifdef DEBUG_PHY_PROC
1735
              LOG_W(PHY,"[eNB %d][PDSCH %x/%d] DLSCH retransmissions exhausted, dropping packet\n",eNB->Mod_id,
1736
                    dlsch->rnti,dl_harq_pid[m]);
1737
#endif
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1738
#if defined(MESSAGE_CHART_GENERATOR_PHY)
1739
              MSC_LOG_EVENT(MSC_PHY_ENB, "0 HARQ DLSCH Failed RNTI %"PRIx16" round %u",
1740 1741
                            dlsch->rnti,
                            dlsch_harq_proc->round);
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1742
#endif
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1743

1744 1745 1746 1747 1748 1749 1750
              dlsch_harq_proc->round = 0;
              ue_stats->dlsch_l2_errors[dl_harq_pid[m]]++;
              dlsch_harq_proc->status = SCH_IDLE;
              dlsch->harq_ids[dl_subframe] = dlsch->Mdlharq;
            }
          } else {
#ifdef DEBUG_PHY_PROC
1751
            LOG_D(PHY,"[eNB %d][PDSCH %x/%d] ACK Received in round %d, resetting process\n",eNB->Mod_id,
1752
                  dlsch->rnti,dl_harq_pid[m],dlsch_harq_proc->round);
1753
#endif
1754

1755
            T(T_ENB_PHY_DLSCH_UE_ACK, T_INT(eNB->Mod_id), T_INT(frame), T_INT(subframe), T_INT(UE_id), T_INT(dlsch->rnti),
1756
              T_INT(dl_harq_pid[m]));
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            ue_stats->dlsch_ACK[dl_harq_pid[m]][dlsch_harq_proc->round]++;

            // Received ACK so set round to 0 and set dlsch_harq_pid IDLE
            dlsch_harq_proc->round  = 0;
            dlsch_harq_proc->status = SCH_IDLE;
            dlsch->harq_ids[dl_subframe] = dlsch->Mdlharq;

            ue_stats->total_TBS = ue_stats->total_TBS +
1766
	      eNB->dlsch[(uint8_t)UE_id][0]->harq_processes[dl_harq_pid[m]]->TBS;
1767 1768
            /*
              ue_stats->total_transmitted_bits = ue_stats->total_transmitted_bits +
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              eNB->dlsch[(uint8_t)UE_id][0]->harq_processes[dl_harq_pid[m]]->TBS;
1770 1771
            */
          }
1772
	 
1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783
          // Do fine-grain rate-adaptation for DLSCH
          if (ue_stats->dlsch_NAK_round0 > dlsch->error_threshold) {
            if (ue_stats->dlsch_mcs_offset == 1)
              ue_stats->dlsch_mcs_offset=0;
            else
              ue_stats->dlsch_mcs_offset=-1;
          }

#ifdef DEBUG_PHY_PROC
          LOG_D(PHY,"[process_HARQ_feedback] Frame %d Setting round to %d for pid %d (subframe %d)\n",frame,
                dlsch_harq_proc->round,dl_harq_pid[m],subframe);
1784
#endif
1785
	  harq_pid_round[UE_id][dl_harq_pid[m]] = dlsch_harq_proc->round;
1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804
          // Clear NAK stats and adjust mcs offset
          // after measurement window timer expires
          if (ue_stats->dlsch_sliding_cnt == dlsch->ra_window_size) {
            if ((ue_stats->dlsch_mcs_offset == 0) && (ue_stats->dlsch_NAK_round0 < 2))
              ue_stats->dlsch_mcs_offset = 1;

            if ((ue_stats->dlsch_mcs_offset == 1) && (ue_stats->dlsch_NAK_round0 > 2))
              ue_stats->dlsch_mcs_offset = 0;

            if ((ue_stats->dlsch_mcs_offset == 0) && (ue_stats->dlsch_NAK_round0 > 2))
              ue_stats->dlsch_mcs_offset = -1;

            if ((ue_stats->dlsch_mcs_offset == -1) && (ue_stats->dlsch_NAK_round0 < 2))
              ue_stats->dlsch_mcs_offset = 0;

            ue_stats->dlsch_NAK_round0 = 0;
            ue_stats->dlsch_sliding_cnt = 0;
          }
        }
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      }
1806
    }
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  }
}

1810
void get_n1_pucch_eNB(PHY_VARS_eNB *eNB,
1811
		      eNB_rxtx_proc_t *proc,
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                      uint8_t UE_id,
                      int16_t *n1_pucch0,
                      int16_t *n1_pucch1,
                      int16_t *n1_pucch2,
                      int16_t *n1_pucch3)
{
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1819
  LTE_DL_FRAME_PARMS *frame_parms=&eNB->frame_parms;
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  uint8_t nCCE0,nCCE1;
1821
  int sf;
1822 1823
  int frame = proc->frame_rx;
  int subframe = proc->subframe_rx;
1824 1825

  if (frame_parms->frame_type == FDD ) {
1826
    sf = (subframe<4) ? (subframe+6) : (subframe-4);
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1828 1829
    if (eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[sf]>0) {
      *n1_pucch0 = frame_parms->pucch_config_common.n1PUCCH_AN + eNB->dlsch[(uint32_t)UE_id][0]->nCCE[sf];
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      *n1_pucch1 = -1;
1831
    } else {
1832 1833 1834
      *n1_pucch0 = -1;
      *n1_pucch1 = -1;
    }
1835
  } else {
1836

1837 1838 1839
    switch (frame_parms->tdd_config) {
    case 1:  // DL:S:UL:UL:DL:DL:S:UL:UL:DL
      if (subframe == 2) {  // ACK subframes 5 and 6
1840
        /*  if (eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[6]>0) {
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	    nCCE1 = eNB->dlsch[(uint32_t)UE_id][0]->nCCE[6];
	    *n1_pucch1 = get_Np(frame_parms->N_RB_DL,nCCE1,1) + nCCE1 + frame_parms->pucch_config_common.n1PUCCH_AN;
	    }
	    else
	    *n1_pucch1 = -1;*/
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1847 1848
        if (eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[5]>0) {
          nCCE0 = eNB->dlsch[(uint32_t)UE_id][0]->nCCE[5];
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          *n1_pucch0 = get_Np(frame_parms->N_RB_DL,nCCE0,0) + nCCE0+ frame_parms->pucch_config_common.n1PUCCH_AN;
        } else
          *n1_pucch0 = -1;

        *n1_pucch1 = -1;
      } else if (subframe == 3) { // ACK subframe 9

1856 1857
        if (eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[9]>0) {
          nCCE0 = eNB->dlsch[(uint32_t)UE_id][0]->nCCE[9];
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          *n1_pucch0 = get_Np(frame_parms->N_RB_DL,nCCE0,0) + nCCE0 +frame_parms->pucch_config_common.n1PUCCH_AN;
        } else
          *n1_pucch0 = -1;

        *n1_pucch1 = -1;

      } else if (subframe == 7) { // ACK subframes 0 and 1
        //harq_ack[0].nCCE;
        //harq_ack[1].nCCE;
1867 1868
        if (eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[0]>0) {
          nCCE0 = eNB->dlsch[(uint32_t)UE_id][0]->nCCE[0];
1869 1870 1871 1872 1873 1874 1875
          *n1_pucch0 = get_Np(frame_parms->N_RB_DL,nCCE0,0) + nCCE0 + frame_parms->pucch_config_common.n1PUCCH_AN;
        } else
          *n1_pucch0 = -1;

        *n1_pucch1 = -1;
      } else if (subframe == 8) { // ACK subframes 4
        //harq_ack[4].nCCE;
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        if (eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[4]>0) {
          nCCE0 = eNB->dlsch[(uint32_t)UE_id][0]->nCCE[4];
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          *n1_pucch0 = get_Np(frame_parms->N_RB_DL,nCCE0,0) + nCCE0 + frame_parms->pucch_config_common.n1PUCCH_AN;
        } else
          *n1_pucch0 = -1;

        *n1_pucch1 = -1;
      } else {
        LOG_D(PHY,"[eNB %d] frame %d: phy_procedures_lte.c: get_n1pucch, illegal subframe %d for tdd_config %d\n",
1885
              eNB->Mod_id,
1886 1887 1888
              frame,
              subframe,frame_parms->tdd_config);
        return;
1889
      }
1890

1891
      break;
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1893 1894
    case 3:  // DL:S:UL:UL:UL:DL:DL:DL:DL:DL
      if (subframe == 2) {  // ACK subframes 5,6 and 1 (S in frame-2), forget about n-11 for the moment (S-subframe)
1895 1896
        if (eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[6]>0) {
          nCCE1 = eNB->dlsch[(uint32_t)UE_id][0]->nCCE[6];
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          *n1_pucch1 = get_Np(frame_parms->N_RB_DL,nCCE1,1) + nCCE1 + frame_parms->pucch_config_common.n1PUCCH_AN;
        } else
          *n1_pucch1 = -1;

1901 1902
        if (eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[5]>0) {
          nCCE0 = eNB->dlsch[(uint32_t)UE_id][0]->nCCE[5];
1903 1904 1905 1906 1907
          *n1_pucch0 = get_Np(frame_parms->N_RB_DL,nCCE0,0) + nCCE0+ frame_parms->pucch_config_common.n1PUCCH_AN;
        } else
          *n1_pucch0 = -1;
      } else if (subframe == 3) { // ACK subframes 7 and 8
        LOG_D(PHY,"get_n1_pucch_eNB : subframe 3, subframe_tx[7] %d, subframe_tx[8] %d\n",
1908
              eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[7],eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[8]);
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1910 1911
        if (eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[8]>0) {
          nCCE1 = eNB->dlsch[(uint32_t)UE_id][0]->nCCE[8];
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          *n1_pucch1 = get_Np(frame_parms->N_RB_DL,nCCE1,1) + nCCE1 + frame_parms->pucch_config_common.n1PUCCH_AN;
          LOG_D(PHY,"nCCE1 %d, n1_pucch1 %d\n",nCCE1,*n1_pucch1);
        } else
          *n1_pucch1 = -1;

1917 1918
        if (eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[7]>0) {
          nCCE0 = eNB->dlsch[(uint32_t)UE_id][0]->nCCE[7];
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          *n1_pucch0 = get_Np(frame_parms->N_RB_DL,nCCE0,0) + nCCE0 +frame_parms->pucch_config_common.n1PUCCH_AN;
          LOG_D(PHY,"nCCE0 %d, n1_pucch0 %d\n",nCCE0,*n1_pucch0);
        } else
          *n1_pucch0 = -1;
      } else if (subframe == 4) { // ACK subframes 9 and 0
1924 1925
        if (eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[0]>0) {
          nCCE1 = eNB->dlsch[(uint32_t)UE_id][0]->nCCE[0];
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          *n1_pucch1 = get_Np(frame_parms->N_RB_DL,nCCE1,1) + nCCE1 + frame_parms->pucch_config_common.n1PUCCH_AN;
        } else
          *n1_pucch1 = -1;

1930 1931
        if (eNB->dlsch[(uint32_t)UE_id][0]->subframe_tx[9]>0) {
          nCCE0 = eNB->dlsch[(uint32_t)UE_id][0]->nCCE[9];
1932 1933 1934 1935 1936
          *n1_pucch0 = get_Np(frame_parms->N_RB_DL,nCCE0,0) + nCCE0 +frame_parms->pucch_config_common.n1PUCCH_AN;
        } else
          *n1_pucch0 = -1;
      } else {
        LOG_D(PHY,"[eNB %d] Frame %d: phy_procedures_lte.c: get_n1pucch, illegal subframe %d for tdd_config %d\n",
1937
              eNB->Mod_id,frame,subframe,frame_parms->tdd_config);
1938
        return;
1939
      }
1940

1941
      break;
1942 1943
    }  // switch tdd_config

1944 1945 1946
    // Don't handle the case M>2
    *n1_pucch2 = -1;
    *n1_pucch3 = -1;
1947 1948 1949
  }
}

1950
void prach_procedures(PHY_VARS_eNB *eNB) {
1951

1952
  LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
1953 1954 1955 1956
  uint16_t preamble_energy_list[64],preamble_delay_list[64];
  uint16_t preamble_max,preamble_energy_max;
  uint16_t i;
  int8_t UE_id;
1957 1958
  int subframe = eNB->proc.subframe_prach;
  int frame = eNB->proc.frame_prach;
1959
  uint8_t CC_id = eNB->CC_id;
1960

1961
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_PRACH_RX,1);
1962 1963
  memset(&preamble_energy_list[0],0,64*sizeof(uint16_t));
  memset(&preamble_delay_list[0],0,64*sizeof(uint16_t));
1964

1965
  if (eNB->abstraction_flag == 0) {
1966
    LOG_D(PHY,"[eNB %d][RAPROC] Frame %d, Subframe %d : PRACH RX Signal Power : %d dBm\n",eNB->Mod_id, 
1967
          frame,subframe,dB_fixed(signal_energy(&eNB->common_vars.rxdata[0][0][subframe*fp->samples_per_tti],512)) - eNB->rx_total_gain_dB);
1968

1969

1970
    rx_prach(eNB,
1971 1972 1973 1974 1975 1976 1977
             preamble_energy_list,
             preamble_delay_list,
             frame,
             0);
  } else {
    for (UE_id=0; UE_id<NB_UE_INST; UE_id++) {

1978
      LOG_D(PHY,"[RAPROC] UE_id %d (%p), generate_prach %d, UE RSI %d, eNB RSI %d preamble index %d\n",
1979
            UE_id,PHY_vars_UE_g[UE_id][CC_id],PHY_vars_UE_g[UE_id][CC_id]->generate_prach,
1980
            PHY_vars_UE_g[UE_id][CC_id]->frame_parms.prach_config_common.rootSequenceIndex,
1981
            fp->prach_config_common.rootSequenceIndex,
1982 1983
            PHY_vars_UE_g[UE_id][CC_id]->prach_PreambleIndex);

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1984
      if ((PHY_vars_UE_g[UE_id][CC_id]->generate_prach==1) &&
1985
          (PHY_vars_UE_g[UE_id][CC_id]->frame_parms.prach_config_common.rootSequenceIndex ==
1986
           fp->prach_config_common.rootSequenceIndex) ) {
1987 1988 1989
        preamble_energy_list[PHY_vars_UE_g[UE_id][CC_id]->prach_PreambleIndex] = 800;
        preamble_delay_list[PHY_vars_UE_g[UE_id][CC_id]->prach_PreambleIndex] = 5;

1990
      }
1991
    }
1992
  }
1993

1994 1995 1996
  preamble_energy_max = preamble_energy_list[0];
  preamble_max = 0;

1997
  for (i=1; i<64; i++) {
1998 1999 2000 2001
    if (preamble_energy_max < preamble_energy_list[i]) {
      preamble_energy_max = preamble_energy_list[i];
      preamble_max = i;
    }
2002 2003 2004
  }

#ifdef DEBUG_PHY_PROC
2005
  LOG_D(PHY,"[RAPROC] Most likely preamble %d, energy %d dB delay %d\n",
2006 2007 2008
        preamble_max,
        preamble_energy_list[preamble_max],
        preamble_delay_list[preamble_max]);
2009 2010
#endif

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2011
  if (preamble_energy_list[preamble_max] > 580) {
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2012

2013
    UE_id = find_next_ue_index(eNB);
2014
 
2015
    if (UE_id>=0) {
2016
      eNB->UE_stats[(uint32_t)UE_id].UE_timing_offset = preamble_delay_list[preamble_max]&0x1FFF; //limit to 13 (=11+2) bits
2017

2018
      eNB->UE_stats[(uint32_t)UE_id].sector = 0;
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2019
      LOG_D(PHY,"[eNB %d/%d][RAPROC] Frame %d, subframe %d Initiating RA procedure (UE_id %d) with preamble %d, energy %d.%d dB, delay %d\n",
2020 2021
            eNB->Mod_id,
            eNB->CC_id,
2022 2023
            frame,
            subframe,
2024
	    UE_id,
2025 2026 2027 2028
            preamble_max,
            preamble_energy_max/10,
            preamble_energy_max%10,
            preamble_delay_list[preamble_max]);
2029

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2030 2031 2032
      T(T_ENB_PHY_INITIATE_RA_PROCEDURE, T_INT(eNB->Mod_id), T_INT(frame), T_INT(subframe), T_INT(UE_id),
        T_INT(preamble_max), T_INT(preamble_energy_max), T_INT(preamble_delay_list[preamble_max]));

2033
      if (eNB->mac_enabled==1) {
2034 2035
        uint8_t update_TA  = 4;
	uint8_t update_TA2 = 1;
2036
        switch (fp->N_RB_DL) {
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        case 6:
          update_TA = 16;
          break;

        case 25:
          update_TA = 4;
          break;

        case 50:
          update_TA = 2;
          break;

2049 2050 2051
	case 75:
	  update_TA  = 3;
	  update_TA2 = 2;
2052
        case 100:
2053
          update_TA  = 1;
2054 2055 2056
          break;
        }

2057 2058 2059 2060
	mac_xface->initiate_ra_proc(eNB->Mod_id,
				    eNB->CC_id,
				    frame,
				    preamble_max,
2061
				    preamble_delay_list[preamble_max]*update_TA/update_TA2,
2062
				    0,subframe,0);
2063 2064
      }      

2065
    } else {
2066
      MSC_LOG_EVENT(MSC_PHY_ENB, "0 RA Failed add user, too many");
2067
      LOG_I(PHY,"[eNB %d][RAPROC] frame %d, subframe %d: Unable to add user, max user count reached\n",
2068
            eNB->Mod_id,frame, subframe);
2069
    }
2070
  }
2071
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_PRACH_RX,0);
2072 2073
}

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2074 2075
void pucch_procedures(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc,int UE_id,int harq_pid)
{
2076
  LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
2077
  uint8_t SR_payload = 0,*pucch_payload=NULL,pucch_payload0[2]= {0,0},pucch_payload1[2]= {0,0};
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  int16_t n1_pucch0 = -1, n1_pucch1 = -1, n1_pucch2 = -1, n1_pucch3 = -1;
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  uint8_t do_SR = 0;
  uint8_t pucch_sel = 0;
2081
  int32_t metric0=0,metric1=0,metric0_SR=0;
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  ANFBmode_t bundling_flag;
  PUCCH_FMT_t format;
2084 2085
  const int subframe = proc->subframe_rx;
  const int frame = proc->frame_rx;
2086

2087 2088
  if ((eNB->dlsch[UE_id][0]) &&
      (eNB->dlsch[UE_id][0]->rnti>0) &&
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2089
      (eNB->ulsch[UE_id]->harq_processes[harq_pid]->subframe_scheduling_flag==0)) {
2090

2091
    // check SR availability
2092 2093
    do_SR = is_SR_subframe(eNB,proc,UE_id);
    //      do_SR = 0;
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2094

2095 2096
    // Now ACK/NAK
    // First check subframe_tx flag for earlier subframes
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2098
    get_n1_pucch_eNB(eNB,
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                     proc,
                     UE_id,
                     &n1_pucch0,
                     &n1_pucch1,
                     &n1_pucch2,
                     &n1_pucch3);

2106
    LOG_D(PHY,"[eNB %d][PDSCH %x] Frame %d, subframe %d Checking for PUCCH (%d,%d,%d,%d) SR %d\n",
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          eNB->Mod_id,eNB->dlsch[UE_id][0]->rnti,
          frame,subframe,
          n1_pucch0,n1_pucch1,n1_pucch2,n1_pucch3,do_SR);

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    if ((n1_pucch0==-1) && (n1_pucch1==-1) && (do_SR==0)) {  // no TX PDSCH that have to be checked and no SR for this UE_id
    } else {
      // otherwise we have some PUCCH detection to do
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      // Null out PUCCH PRBs for noise measurement
      switch(fp->N_RB_UL) {
      case 6:
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        eNB->rb_mask_ul[0] |= (0x1 | (1<<5)); //position 5
        break;
2120
      case 15:
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        eNB->rb_mask_ul[0] |= (0x1 | (1<<14)); // position 14
        break;
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      case 25:
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        eNB->rb_mask_ul[0] |= (0x1 | (1<<24)); // position 24
        break;
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      case 50:
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        eNB->rb_mask_ul[0] |= 0x1;
        eNB->rb_mask_ul[1] |= (1<<17); // position 49 (49-32)
        break;
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      case 75:
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        eNB->rb_mask_ul[0] |= 0x1;
        eNB->rb_mask_ul[2] |= (1<<10); // position 74 (74-64)
        break;
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      case 100:
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        eNB->rb_mask_ul[0] |= 0x1;
        eNB->rb_mask_ul[3] |= (1<<3); // position 99 (99-96)
        break;
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      default:
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        LOG_E(PHY,"Unknown number for N_RB_UL %d\n",fp->N_RB_UL);
        break;
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      }
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      if (do_SR == 1) {
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        eNB->UE_stats[UE_id].sr_total++;


        if (eNB->abstraction_flag == 0) {
          metric0_SR = rx_pucch(eNB,
                                pucch_format1,
                                UE_id,
                                eNB->scheduling_request_config[UE_id].sr_PUCCH_ResourceIndex,
                                0, // n2_pucch
                                0, // shortened format, should be use_srs flag, later
                                &SR_payload,
                                frame,
                                subframe,
                                PUCCH1_THRES);
          LOG_D(PHY,"[eNB %d][SR %x] Frame %d subframe %d Checking SR is %d (SR n1pucch is %d)\n",
                eNB->Mod_id,
                eNB->ulsch[UE_id]->rnti,
                frame,
                subframe,
                SR_payload,
                eNB->scheduling_request_config[UE_id].sr_PUCCH_ResourceIndex);
        }
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#ifdef PHY_ABSTRACTION
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        else {
          metric0_SR = rx_pucch_emul(eNB,
                                     proc,
                                     UE_id,
                                     pucch_format1,
                                     0,
                                     &SR_payload);
          LOG_D(PHY,"[eNB %d][SR %x] Frame %d subframe %d Checking SR (UE SR %d/%d)\n",eNB->Mod_id,
                eNB->ulsch[UE_id]->rnti,frame,subframe,SR_payload,eNB->scheduling_request_config[UE_id].sr_PUCCH_ResourceIndex);
        }
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#endif
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      }// do_SR==1
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      if ((n1_pucch0==-1) && (n1_pucch1==-1)) { // just check for SR
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      } else if (fp->frame_type==FDD) { // FDD
        // if SR was detected, use the n1_pucch from SR, else use n1_pucch0
        //          n1_pucch0 = (SR_payload==1) ? eNB->scheduling_request_config[UE_id].sr_PUCCH_ResourceIndex:n1_pucch0;

        LOG_D(PHY,"Demodulating PUCCH for ACK/NAK: n1_pucch0 %d (%d), SR_payload %d\n",n1_pucch0,eNB->scheduling_request_config[UE_id].sr_PUCCH_ResourceIndex,SR_payload);

        if (eNB->abstraction_flag == 0) {
          metric0 = rx_pucch(eNB,
                             pucch_format1a,
                             UE_id,
                             (uint16_t)n1_pucch0,
                             0, //n2_pucch
                             0, // shortened format
                             pucch_payload0,
                             frame,
                             subframe,
                             PUCCH1a_THRES);
        }
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#ifdef PHY_ABSTRACTION
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        else {
          metric0 = rx_pucch_emul(eNB,
                                  proc,
                                  UE_id,
                                  pucch_format1a,
                                  0,
                                  pucch_payload0);
        }
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#endif
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        /* cancel SR detection if reception on n1_pucch0 is better than on SR PUCCH resource index */
        if (do_SR && metric0 > metric0_SR) SR_payload = 0;

        if (do_SR && metric0 <= metric0_SR) {
          /* when transmitting ACK/NACK on SR PUCCH resource index, SR payload is always 1 */
          SR_payload = 1;

          if (eNB->abstraction_flag == 0) {
            metric0=rx_pucch(eNB,
                             pucch_format1a,
                             UE_id,
                             eNB->scheduling_request_config[UE_id].sr_PUCCH_ResourceIndex,
                             0, //n2_pucch
                             0, // shortened format
                             pucch_payload0,
                             frame,
                             subframe,
                             PUCCH1a_THRES);
          }
#ifdef PHY_ABSTRACTION
          else {
            metric0 = rx_pucch_emul(eNB,
                                    proc,
                                    UE_id,
                                    pucch_format1a,
                                    0,
                                    pucch_payload0);
          }
#endif
        }

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#ifdef DEBUG_PHY_PROC
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        LOG_D(PHY,"[eNB %d][PDSCH %x] Frame %d subframe %d pucch1a (FDD) payload %d (metric %d)\n",
            eNB->Mod_id,
            eNB->dlsch[UE_id][0]->rnti,
            frame,subframe,
            pucch_payload0[0],metric0);
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#endif
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        process_HARQ_feedback(UE_id,eNB,proc,
                            0,// pusch_flag
                            pucch_payload0,
                            2,
                            SR_payload);
      } // FDD
      else {  //TDD
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        bundling_flag = eNB->pucch_config_dedicated[UE_id].tdd_AckNackFeedbackMode;
2258

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        // fix later for 2 TB case and format1b
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        if ((fp->frame_type==FDD) ||
          (bundling_flag==bundling)    ||
          ((fp->frame_type==TDD)&&(fp->tdd_config==1)&&((subframe!=2)||(subframe!=7)))) {
          format = pucch_format1a;
        } else {
          format = pucch_format1b;
        }
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        // if SR was detected, use the n1_pucch from SR
        if (SR_payload==1) {
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#ifdef DEBUG_PHY_PROC
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          LOG_D(PHY,"[eNB %d][PDSCH %x] Frame %d subframe %d Checking ACK/NAK (%d,%d,%d,%d) format %d with SR\n",eNB->Mod_id,
                eNB->dlsch[UE_id][0]->rnti,
                frame,subframe,
                n1_pucch0,n1_pucch1,n1_pucch2,n1_pucch3,format);
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#endif
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          if (eNB->abstraction_flag == 0)
            metric0 = rx_pucch(eNB,
                               format,
                               UE_id,
                               eNB->scheduling_request_config[UE_id].sr_PUCCH_ResourceIndex,
                               0, //n2_pucch
                               0, // shortened format
                               pucch_payload0,
                               frame,
                               subframe,
                               PUCCH1a_THRES);
          else {
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#ifdef PHY_ABSTRACTION
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            metric0 = rx_pucch_emul(eNB,proc,
                                    UE_id,
                                    format,
                                    0,
                                    pucch_payload0);
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#endif
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          }
        } else { //using n1_pucch0/n1_pucch1 resources
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#ifdef DEBUG_PHY_PROC
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          LOG_D(PHY,"[eNB %d][PDSCH %x] Frame %d subframe %d Checking ACK/NAK (%d,%d,%d,%d) format %d\n",eNB->Mod_id,
                eNB->dlsch[UE_id][0]->rnti,
                frame,subframe,
                n1_pucch0,n1_pucch1,n1_pucch2,n1_pucch3,format);
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#endif
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          metric0=0;
          metric1=0;

          // Check n1_pucch0 metric
          if (n1_pucch0 != -1) {
            if (eNB->abstraction_flag == 0)
              metric0 = rx_pucch(eNB,
                                 format,
                                 UE_id,
                                 (uint16_t)n1_pucch0,
                                 0, // n2_pucch
                                 0, // shortened format
                                 pucch_payload0,
                                 frame,
                                 subframe,
                                 PUCCH1a_THRES);
            else {
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#ifdef PHY_ABSTRACTION
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              metric0 = rx_pucch_emul(eNB,
                                      proc,
                                      UE_id,
                                      format,
                                      0,
                                      pucch_payload0);
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#endif
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            }
          }
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          // Check n1_pucch1 metric
          if (n1_pucch1 != -1) {
            if (eNB->abstraction_flag == 0)
              metric1 = rx_pucch(eNB,
                                 format,
                                 UE_id,
                                 (uint16_t)n1_pucch1,
                                 0, //n2_pucch
                                 0, // shortened format
                                 pucch_payload1,
                                 frame,
                                 subframe,
                                 PUCCH1a_THRES);
            else {
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#ifdef PHY_ABSTRACTION
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              metric1 = rx_pucch_emul(eNB,
                                      proc,
                                      UE_id,
                                      format,
                                      1,
                                      pucch_payload1);
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#endif
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            }
          }
        }
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        if (SR_payload == 1) {
          pucch_payload = pucch_payload0;

          if (bundling_flag == bundling)
            pucch_sel = 2;
        } else if (bundling_flag == multiplexing) { // multiplexing + no SR
          pucch_payload = (metric1>metric0) ? pucch_payload1 : pucch_payload0;
          pucch_sel     = (metric1>metric0) ? 1 : 0;
        } else { // bundling + no SR
          if (n1_pucch1 != -1)
            pucch_payload = pucch_payload1;
          else if (n1_pucch0 != -1)
            pucch_payload = pucch_payload0;

          pucch_sel = 2;  // indicate that this is a bundled ACK/NAK
        }
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#ifdef DEBUG_PHY_PROC
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        LOG_D(PHY,"[eNB %d][PDSCH %x] Frame %d subframe %d ACK/NAK metric 0 %d, metric 1 %d, sel %d, (%d,%d)\n",eNB->Mod_id,
              eNB->dlsch[UE_id][0]->rnti,
              frame,subframe,
              metric0,metric1,pucch_sel,pucch_payload[0],pucch_payload[1]);
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#endif
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        process_HARQ_feedback(UE_id,eNB,proc,
                              0,// pusch_flag
                              pucch_payload,
                              pucch_sel,
                              SR_payload);
      } // TDD
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    }
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    if (SR_payload == 1) {
      LOG_D(PHY,"[eNB %d][SR %x] Frame %d subframe %d Got SR for PUSCH, transmitting to MAC\n",eNB->Mod_id,
            eNB->ulsch[UE_id]->rnti,frame,subframe);
      eNB->UE_stats[UE_id].sr_received++;

      if (eNB->first_sr[UE_id] == 1) { // this is the first request for uplink after Connection Setup, so clear HARQ process 0 use for Msg4
        eNB->first_sr[UE_id] = 0;
        eNB->dlsch[UE_id][0]->harq_processes[0]->round=0;
        eNB->dlsch[UE_id][0]->harq_processes[0]->status=SCH_IDLE;
        LOG_D(PHY,"[eNB %d][SR %x] Frame %d subframe %d First SR\n",
              eNB->Mod_id,
              eNB->ulsch[UE_id]->rnti,frame,subframe);
      }

      if (eNB->mac_enabled==1) {
        mac_xface->SR_indication(eNB->Mod_id,
                                 eNB->CC_id,
                                 frame,
                                 eNB->dlsch[UE_id][0]->rnti,subframe);
      }
    }
  }
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}
2413

2414

2415
void cba_procedures(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc,int UE_id,int harq_pid) {
2416

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  uint8_t access_mode;
  int num_active_cba_groups;
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  const int subframe = proc->subframe_rx;
  const int frame = proc->frame_rx;
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  uint16_t rnti=0;
  int ret=0;
2423
  LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
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  if (eNB->ulsch[UE_id]==NULL) return;

2427
  num_active_cba_groups = eNB->ulsch[UE_id]->num_active_cba_groups;
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  if ((num_active_cba_groups > 0) &&
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      (eNB->ulsch[UE_id]->cba_rnti[UE_id%num_active_cba_groups]>0) &&
      (eNB->ulsch[UE_id]->harq_processes[harq_pid]->subframe_cba_scheduling_flag==1)) {
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    rnti=0;
    
#ifdef DEBUG_PHY_PROC
    LOG_D(PHY,"[eNB %d][PUSCH %d] frame %d subframe %d Checking PUSCH/ULSCH CBA Reception for UE %d with cba rnti %x mode %s\n",
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	  eNB->Mod_id,harq_pid,
2437
	  frame,subframe,
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	  UE_id, (uint16_t)eNB->ulsch[UE_id]->cba_rnti[UE_id%num_active_cba_groups],mode_string[eNB->UE_stats[UE_id].mode]);
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#endif
2440
    
2441
    if (eNB->abstraction_flag==0) {
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      rx_ulsch(eNB,proc,
2443
	       eNB->UE_stats[UE_id].sector,  // this is the effective sector id
2444
	       UE_id,
2445
	       eNB->ulsch,
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	       0);
    }
    
#ifdef PHY_ABSTRACTION
    else {
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      rx_ulsch_emul(eNB,proc,
2452
		    eNB->UE_stats[UE_id].sector,  // this is the effective sector id
2453
		    UE_id);
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    }
    
2456
#endif
2457
    
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    if (eNB->abstraction_flag == 0) {
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      ret = ulsch_decoding(eNB,proc,
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			   UE_id,
			   0, // control_only_flag
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			   eNB->ulsch[UE_id]->harq_processes[harq_pid]->V_UL_DAI,
			   eNB->ulsch[UE_id]->harq_processes[harq_pid]->nb_rb>20 ? 1 : 0);
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    }
    
#ifdef PHY_ABSTRACTION
    else {
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      ret = ulsch_decoding_emul(eNB,
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				proc,
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				UE_id,
				&rnti);
    }
    
#endif
    
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    if (eNB->ulsch[UE_id]->harq_processes[harq_pid]->cqi_crc_status == 1) {
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#ifdef DEBUG_PHY_PROC
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      print_CQI(eNB->ulsch[UE_id]->harq_processes[harq_pid]->o,eNB->ulsch[UE_id]->harq_processes[harq_pid]->uci_format,0,fp->N_RB_DL);
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#endif
      access_mode = UNKNOWN_ACCESS;
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      extract_CQI(eNB->ulsch[UE_id]->harq_processes[harq_pid]->o,
		  eNB->ulsch[UE_id]->harq_processes[harq_pid]->uci_format,
		  &eNB->UE_stats[UE_id],
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		  fp->N_RB_DL,
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		  &rnti, &access_mode);
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      eNB->UE_stats[UE_id].rank = eNB->ulsch[UE_id]->harq_processes[harq_pid]->o_RI[0];
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    }
    
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    eNB->ulsch[UE_id]->harq_processes[harq_pid]->subframe_cba_scheduling_flag=0;
    eNB->ulsch[UE_id]->harq_processes[harq_pid]->status= SCH_IDLE;
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    if ((num_active_cba_groups > 0) &&
	(UE_id + num_active_cba_groups < NUMBER_OF_UE_MAX) &&
	(eNB->ulsch[UE_id+num_active_cba_groups]->cba_rnti[UE_id%num_active_cba_groups] > 0 ) &&
	(eNB->ulsch[UE_id+num_active_cba_groups]->num_active_cba_groups> 0)) {
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#ifdef DEBUG_PHY_PROC
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      LOG_D(PHY,"[eNB %d][PUSCH %d] frame %d subframe %d UE %d harq_pid %d resetting the subframe_scheduling_flag for Ue %d cba groups %d members\n",
	    eNB->Mod_id,harq_pid,frame,subframe,UE_id,harq_pid,
	    UE_id+num_active_cba_groups, UE_id%eNB->ulsch[UE_id]->num_active_cba_groups);
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#endif
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      eNB->ulsch[UE_id+num_active_cba_groups]->harq_processes[harq_pid]->subframe_cba_scheduling_flag=1;
      eNB->ulsch[UE_id+num_active_cba_groups]->harq_processes[harq_pid]->status= CBA_ACTIVE;
      eNB->ulsch[UE_id+num_active_cba_groups]->harq_processes[harq_pid]->TBS=eNB->ulsch[UE_id]->harq_processes[harq_pid]->TBS;
    }
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    if (ret == (1+MAX_TURBO_ITERATIONS)) {
      eNB->UE_stats[UE_id].ulsch_round_errors[harq_pid][eNB->ulsch[UE_id]->harq_processes[harq_pid]->round]++;
      eNB->ulsch[UE_id]->harq_processes[harq_pid]->phich_active = 1;
      eNB->ulsch[UE_id]->harq_processes[harq_pid]->phich_ACK = 0;
      eNB->ulsch[UE_id]->harq_processes[harq_pid]->round++;
    } // ulsch in error
    else {
      LOG_D(PHY,"[eNB %d][PUSCH %d] Frame %d subframe %d ULSCH received, setting round to 0, PHICH ACK\n",
	    eNB->Mod_id,harq_pid,
	    frame,subframe);

      eNB->ulsch[UE_id]->harq_processes[harq_pid]->phich_active = 1;
      eNB->ulsch[UE_id]->harq_processes[harq_pid]->phich_ACK = 1;
      eNB->ulsch[UE_id]->harq_processes[harq_pid]->round = 0;
      eNB->UE_stats[UE_id].ulsch_consecutive_errors = 0;
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#ifdef DEBUG_PHY_PROC
#ifdef DEBUG_ULSCH
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      LOG_D(PHY,"[eNB] Frame %d, Subframe %d : ULSCH SDU (RX harq_pid %d) %d bytes:",
	    frame,subframe,
	    harq_pid,eNB->ulsch[UE_id]->harq_processes[harq_pid]->TBS>>3);

      for (j=0; j<eNB->ulsch[UE_id]->harq_processes[harq_pid]->TBS>>3; j++)
	LOG_T(PHY,"%x.",eNB->ulsch[UE_id]->harq_processes[harq_pid]->b[j]);

      LOG_T(PHY,"\n");
#endif
#endif

      if (access_mode > UNKNOWN_ACCESS) {
	LOG_D(PHY,"[eNB %d] Frame %d, Subframe %d : received ULSCH SDU from CBA transmission, UE (%d,%x), CBA (group %d, rnti %x)\n",
	      eNB->Mod_id, frame,subframe,
	      UE_id, eNB->ulsch[UE_id]->rnti,
	      UE_id % eNB->ulsch[UE_id]->num_active_cba_groups, eNB->ulsch[UE_id]->cba_rnti[UE_id%num_active_cba_groups]);

	// detect if there is a CBA collision
2542 2543
	if ((eNB->cba_last_reception[UE_id%num_active_cba_groups] == 0 ) && 
	    (eNB->mac_enabled==1)) {
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	  mac_xface->rx_sdu(eNB->Mod_id,
			    eNB->CC_id,
			    frame,subframe,
			    eNB->ulsch[UE_id]->rnti,
			    eNB->ulsch[UE_id]->harq_processes[harq_pid]->b,
			    eNB->ulsch[UE_id]->harq_processes[harq_pid]->TBS>>3,
			    harq_pid,
			    NULL);

	  eNB->cba_last_reception[UE_id%num_active_cba_groups]+=1;//(subframe);
	} else {
	  if (eNB->cba_last_reception[UE_id%num_active_cba_groups] == 1 )
	    LOG_N(PHY,"[eNB%d] Frame %d subframe %d : first CBA collision detected \n ",
		  eNB->Mod_id,frame,subframe);

	  LOG_N(PHY,"[eNB%d] Frame %d subframe %d : CBA collision set SR for UE %d in group %d \n ",
		eNB->Mod_id,frame,subframe,
		eNB->cba_last_reception[UE_id%num_active_cba_groups],UE_id%num_active_cba_groups );

	  eNB->cba_last_reception[UE_id%num_active_cba_groups]+=1;

	  mac_xface->SR_indication(eNB->Mod_id,
				   eNB->CC_id,
				   frame,
				   eNB->dlsch[UE_id][0]->rnti,subframe);
	}
      } // UNKNOWN_ACCESS
    } // ULSCH CBA not in error
2572
  }
2573

2574
}
2575

2576 2577 2578 2579
typedef struct {
  PHY_VARS_eNB *eNB;
  int slot;
} fep_task;
2580

2581
void fep0(PHY_VARS_eNB *eNB,int slot) {
2582

2583 2584 2585
  eNB_proc_t *proc       = &eNB->proc;
  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
  int l;
2586

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2587
  //  printf("fep0: slot %d\n",slot);
2588

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  remove_7_5_kHz(eNB,(slot&1)+(proc->subframe_rx<<1));
  for (l=0; l<fp->symbols_per_tti/2; l++) {
    slot_fep_ul(fp,
		&eNB->common_vars,
		l,
		(slot&1)+(proc->subframe_rx<<1),
		0,
		0
		);
  }
}
2600

2601

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2603 2604 2605 2606
extern int oai_exit;

static void *fep_thread(void *param) {

2607
  pthread_setname_np( pthread_self(), "UEfep");
2608 2609 2610
  PHY_VARS_eNB *eNB = (PHY_VARS_eNB *)param;
  eNB_proc_t *proc  = &eNB->proc;
  while (!oai_exit) {
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    if (wait_on_condition(&proc->mutex_fep,&proc->cond_fep,&proc->instance_cnt_fep,"fep thread")<0) break;  
    fep0(eNB,0);
    if (release_thread(&proc->mutex_fep,&proc->instance_cnt_fep,"fep thread")<0) break;
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2615 2616 2617 2618

    if (pthread_cond_signal(&proc->cond_fep) != 0) {
      printf("[eNB] ERROR pthread_cond_signal for fep thread exit\n");
      exit_fun( "ERROR pthread_cond_signal" );
2619
      return NULL;
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2620
    }
2621
  }
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  return(NULL);
}

2628
void init_fep_thread(PHY_VARS_eNB *eNB,pthread_attr_t *attr_fep) {
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2629

2630
  eNB_proc_t *proc = &eNB->proc;
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  proc->instance_cnt_fep         = -1;
    
  pthread_mutex_init( &proc->mutex_fep, NULL);
  pthread_cond_init( &proc->cond_fep, NULL);

  pthread_create(&proc->pthread_fep, attr_fep, fep_thread, (void*)eNB);
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2640 2641
}

2642 2643 2644
extern void *td_thread(void*);

void init_td_thread(PHY_VARS_eNB *eNB,pthread_attr_t *attr_td) {
2645 2646 2647

  eNB_proc_t *proc = &eNB->proc;

2648 2649
  proc->tdp.eNB = eNB;
  proc->instance_cnt_td         = -1;
2650
    
2651 2652
  pthread_mutex_init( &proc->mutex_td, NULL);
  pthread_cond_init( &proc->cond_td, NULL);
2653

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  pthread_create(&proc->pthread_td, attr_td, td_thread, (void*)&proc->tdp);

}

extern void *te_thread(void*);

void init_te_thread(PHY_VARS_eNB *eNB,pthread_attr_t *attr_te) {

  eNB_proc_t *proc = &eNB->proc;

  proc->tep.eNB = eNB;
  proc->instance_cnt_te         = -1;
    
  pthread_mutex_init( &proc->mutex_te, NULL);
  pthread_cond_init( &proc->cond_te, NULL);

  printf("Creating te_thread\n");
  pthread_create(&proc->pthread_te, attr_te, te_thread, (void*)&proc->tep);
2672 2673 2674

}

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2675

2676
void eNB_fep_full_2thread(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc_rxtx) {
2677 2678

  eNB_proc_t *proc = &eNB->proc;
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2679

2680
  struct timespec wait;
2681

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  wait.tv_sec=0;
  wait.tv_nsec=5000000L;

  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_SLOT_FEP,1);
  start_meas(&eNB->ofdm_demod_stats);

  if (pthread_mutex_timedlock(&proc->mutex_fep,&wait) != 0) {
2689
    printf("[eNB] ERROR pthread_mutex_lock for fep thread (IC %d)\n", proc->instance_cnt_fep);
2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702
    exit_fun( "error locking mutex_fep" );
    return;
  }

  if (proc->instance_cnt_fep==0) {
    printf("[eNB] FEP thread busy\n");
    exit_fun("FEP thread busy");
    pthread_mutex_unlock( &proc->mutex_fep );
    return;
  }
  
  ++proc->instance_cnt_fep;

2703

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  if (pthread_cond_signal(&proc->cond_fep) != 0) {
    printf("[eNB] ERROR pthread_cond_signal for fep thread\n");
    exit_fun( "ERROR pthread_cond_signal" );
    return;
  }
  
  pthread_mutex_unlock( &proc->mutex_fep );

  // call second slot in this symbol
  fep0(eNB,1);

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2715
  wait_on_busy_condition(&proc->mutex_fep,&proc->cond_fep,&proc->instance_cnt_fep,"fep thread");  
2716

2717
  stop_meas(&eNB->ofdm_demod_stats);
2718 2719
}

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2720 2721


2722
void eNB_fep_full(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc_rxtx) {
2723

2724
  int l;
2725
  LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
2726

2727
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_SLOT_FEP,1);
2728
  start_meas(&eNB->ofdm_demod_stats);
2729 2730
  remove_7_5_kHz(eNB,proc_rxtx->subframe_rx<<1);
  remove_7_5_kHz(eNB,1+(proc_rxtx->subframe_rx<<1));
2731 2732 2733 2734
  for (l=0; l<fp->symbols_per_tti/2; l++) {
    slot_fep_ul(fp,
		&eNB->common_vars,
		l,
2735
		(proc_rxtx->subframe_rx)<<1,
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2736
		0,
2737 2738 2739 2740 2741
		0
		);
    slot_fep_ul(fp,
		&eNB->common_vars,
		l,
2742
		1+((proc_rxtx->subframe_rx)<<1),
2743 2744 2745 2746
		0,
		0
		);
  }
2747
  stop_meas(&eNB->ofdm_demod_stats);
2748 2749 2750 2751 2752
  
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_SLOT_FEP,0);
  
  if (eNB->node_function == NGFI_RRU_IF4p5) {
    /// **** send_IF4 of rxdataF to RCC (no prach now) **** ///
2753
    LOG_D(PHY,"send_IF4p5 (PULFFT): frame %d, subframe %d\n",proc_rxtx->frame_rx,proc_rxtx->subframe_rx);
2754
    send_IF4p5(eNB, proc_rxtx->frame_rx, proc_rxtx->subframe_rx, IF4p5_PULFFT, 0);
2755 2756 2757 2758
    start_fh_prev = start_fh;
    start_fh_prev_sf = start_fh_sf;
    clock_gettime( CLOCK_MONOTONIC, &start_fh);
    start_fh_sf = proc_rxtx->subframe_rx;
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2759
  }    
2760 2761
}

2762
void eNB_fep_rru_if5(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc_rxtx) {
2763

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2764
  eNB_proc_t *proc=&eNB->proc;
2765 2766 2767 2768 2769
  uint8_t seqno=0;

  /// **** send_IF5 of rxdata to BBU **** ///       
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_SEND_IF5, 1 );  
  send_IF5(eNB, proc->timestamp_rx, proc->subframe_rx, &seqno, IF5_RRH_GW_UL);
2770 2771 2772 2773
  start_fh_prev = start_fh;
  start_fh_prev_sf = start_fh_sf;
  clock_gettime( CLOCK_MONOTONIC, &start_fh);
  start_fh_sf = proc->subframe_rx;
2774 2775 2776 2777
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_SEND_IF5, 0 );          

}

2778
void do_prach(PHY_VARS_eNB *eNB,int frame,int subframe) {
2779

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2780
  eNB_proc_t *proc = &eNB->proc;
2781 2782 2783
  LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;

  // check if we have to detect PRACH first
2784
  if (is_prach_subframe(fp,frame,subframe)>0) { 
2785 2786 2787
    /* accept some delay in processing - up to 5ms */
    int i;
    for (i = 0; i < 10 && proc->instance_cnt_prach == 0; i++) {
2788
      LOG_W(PHY,"[eNB] Frame %d Subframe %d, eNB PRACH thread busy (IC %d)!!\n", frame,subframe,proc->instance_cnt_prach);
2789 2790 2791 2792 2793 2794 2795 2796 2797
      usleep(500);
    }
    if (proc->instance_cnt_prach == 0) {
      exit_fun( "PRACH thread busy" );
      return;
    }
    
    // wake up thread for PRACH RX
    if (pthread_mutex_lock(&proc->mutex_prach) != 0) {
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2798
      LOG_E( PHY, "[eNB] ERROR pthread_mutex_lock for eNB PRACH thread %d (IC %d)\n", proc->thread_index, proc->instance_cnt_prach);
2799 2800 2801 2802 2803 2804
      exit_fun( "error locking mutex_prach" );
      return;
    }
    
    ++proc->instance_cnt_prach;
    // set timing for prach thread
2805 2806
    proc->frame_prach = frame;
    proc->subframe_prach = subframe;
2807 2808 2809 2810 2811 2812 2813 2814 2815
    
    // the thread can now be woken up
    if (pthread_cond_signal(&proc->cond_prach) != 0) {
      LOG_E( PHY, "[eNB] ERROR pthread_cond_signal for eNB PRACH thread %d\n", proc->thread_index);
      exit_fun( "ERROR pthread_cond_signal" );
      return;
    }
    
    pthread_mutex_unlock( &proc->mutex_prach );
2816
  }
2817

2818
}
2819

2820
void phy_procedures_eNB_common_RX(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc){
2821 2822


2823
  //  eNB_proc_t *proc       = &eNB->proc;
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2824 2825 2826
  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
  const int subframe     = proc->subframe_rx;
  const int frame        = proc->frame_rx;
2827
  int offset             = (eNB->single_thread_flag==1) ? 0 : (subframe&1);
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2828

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2829 2830
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_RX0_ENB+offset, proc->frame_rx );
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_RX0_ENB+offset, proc->subframe_rx );
2831

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  if ((fp->frame_type == TDD) && (subframe_select(fp,subframe)!=SF_UL)) {

    if (eNB->node_function == NGFI_RRU_IF4p5) {
      /// **** in TDD during DL send_IF4 of ULTICK to RCC **** ///
      send_IF4p5(eNB, proc->frame_rx, proc->subframe_rx, IF4p5_PULTICK, 0);
    }    
    return;
  }
2840

2841 2842

  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_ENB_RX_COMMON+offset, 1 ); 
2843
  start_meas(&eNB->phy_proc_rx);
2844
  LOG_D(PHY,"[eNB %d] Frame %d: Doing phy_procedures_eNB_common_RX(%d)\n",eNB->Mod_id,frame,subframe);
2845

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2846

2847
  if (eNB->fep) eNB->fep(eNB,proc);
2848

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2849
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_ENB_RX_COMMON+offset, 0 );
2850 2851
}

2852

2853
void phy_procedures_eNB_uespec_RX(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc,const relaying_type_t r_type)
2854
{
2855
  //RX processing for ue-specific resources (i
2856
  UNUSED(r_type);
2857
  uint32_t ret=0,i,j,k;
2858 2859 2860 2861 2862
  uint32_t harq_pid, harq_idx, round;
  uint8_t nPRS;
  int sync_pos;
  uint16_t rnti=0;
  uint8_t access_mode;
2863
  LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
2864

2865
  const int subframe = proc->subframe_rx;
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2866
  const int frame    = proc->frame_rx;
2867
  int offset         = eNB->CC_id;//(proc == &eNB->proc.proc_rxtx[0]) ? 0 : 1;
2868

2869

2870
  if ((fp->frame_type == TDD) && (subframe_select(fp,subframe)!=SF_UL)) return;
2871

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2872
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_ENB_RX_UESPEC+offset, 1 );
2873

2874
#ifdef DEBUG_PHY_PROC
2875
  LOG_D(PHY,"[eNB %d] Frame %d: Doing phy_procedures_eNB_uespec_RX(%d)\n",eNB->Mod_id,frame, subframe);
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2876
#endif
2877

2878
  T(T_ENB_PHY_UL_TICK, T_INT(eNB->Mod_id), T_INT(frame), T_INT(subframe));
2879

2880
  T(T_ENB_PHY_INPUT_SIGNAL, T_INT(eNB->Mod_id), T_INT(frame), T_INT(subframe), T_INT(0),
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2881
    T_BUFFER(&eNB->common_vars.rxdata[0][0][subframe*eNB->frame_parms.samples_per_tti],
2882
             eNB->frame_parms.samples_per_tti * 4));
2883

2884 2885 2886 2887
  eNB->rb_mask_ul[0]=0;
  eNB->rb_mask_ul[1]=0;
  eNB->rb_mask_ul[2]=0;
  eNB->rb_mask_ul[3]=0;
2888

2889 2890


2891
  // Check for active processes in current subframe
2892
  harq_pid = subframe2harq_pid(fp,
2893
                               frame,subframe);
2894

2895 2896
  // reset the cba flag used for collision detection
  for (i=0; i < NUM_MAX_CBA_GROUP; i++) {
2897
    eNB->cba_last_reception[i]=0;
2898
  }
2899

2900
  // Do PUCCH processing first
2901

2902
  for (i=0; i<NUMBER_OF_UE_MAX; i++) {
2903
    pucch_procedures(eNB,proc,i,harq_pid);
2904
  }
2905

2906
  for (i=0; i<NUMBER_OF_UE_MAX; i++) {
2907

2908
    // check for Msg3
2909
    if (eNB->mac_enabled==1) {
2910
      if (eNB->UE_stats[i].mode == RA_RESPONSE) {
2911
	process_Msg3(eNB,proc,i,harq_pid);
2912 2913
      }
    }
2914 2915


2916 2917 2918
    eNB->pusch_stats_rb[i][(frame*10)+subframe] = -63;
    eNB->pusch_stats_round[i][(frame*10)+subframe] = 0;
    eNB->pusch_stats_mcs[i][(frame*10)+subframe] = -63;
2919

2920 2921 2922
    if ((eNB->ulsch[i]) &&
        (eNB->ulsch[i]->rnti>0) &&
        (eNB->ulsch[i]->harq_processes[harq_pid]->subframe_scheduling_flag==1)) {
2923
      // UE is has ULSCH scheduling
2924
      round = eNB->ulsch[i]->harq_processes[harq_pid]->round;
2925
 
2926
      for (int rb=0;
2927
           rb<=eNB->ulsch[i]->harq_processes[harq_pid]->nb_rb;
2928
	   rb++) {
2929
	int rb2 = rb+eNB->ulsch[i]->harq_processes[harq_pid]->first_rb;
2930
	eNB->rb_mask_ul[rb2>>5] |= (1<<(rb2&31));
2931
      }
2932 2933


2934
      if (eNB->ulsch[i]->Msg3_flag == 1) {
2935
        LOG_D(PHY,"[eNB %d] frame %d, subframe %d: Scheduling ULSCH Reception for Msg3 in Sector %d\n",
2936
              eNB->Mod_id,
2937 2938
              frame,
              subframe,
2939
              eNB->UE_stats[i].sector);
2940 2941
	VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_ULSCH_MSG3,1);
      } else {
2942

2943
        LOG_D(PHY,"[eNB %d] frame %d, subframe %d: Scheduling ULSCH Reception for UE %d Mode %s\n",
2944
              eNB->Mod_id,
2945 2946 2947
              frame,
              subframe,
              i,
2948
              mode_string[eNB->UE_stats[i].mode]);
2949
      }
2950

2951

2952
      nPRS = fp->pusch_config_common.ul_ReferenceSignalsPUSCH.nPRS[subframe<<1];
2953

2954
      eNB->ulsch[i]->cyclicShift = (eNB->ulsch[i]->harq_processes[harq_pid]->n_DMRS2 + fp->pusch_config_common.ul_ReferenceSignalsPUSCH.cyclicShift +
2955
				    nPRS)%12;
2956

2957
      if (fp->frame_type == FDD ) {
2958
        int sf = (subframe<4) ? (subframe+6) : (subframe-4);
2959

2960 2961
        if (eNB->dlsch[i][0]->subframe_tx[sf]>0) { // we have downlink transmission
          eNB->ulsch[i]->harq_processes[harq_pid]->O_ACK = 1;
2962
        } else {
2963
          eNB->ulsch[i]->harq_processes[harq_pid]->O_ACK = 0;
2964
        }
2965
      }
2966

2967 2968
      LOG_D(PHY,
            "[eNB %d][PUSCH %d] Frame %d Subframe %d Demodulating PUSCH: dci_alloc %d, rar_alloc %d, round %d, first_rb %d, nb_rb %d, mcs %d, TBS %d, rv %d, cyclic_shift %d (n_DMRS2 %d, cyclicShift_common %d, nprs %d), O_ACK %d \n",
2969
            eNB->Mod_id,harq_pid,frame,subframe,
2970 2971 2972 2973 2974 2975 2976 2977 2978 2979
            eNB->ulsch[i]->harq_processes[harq_pid]->dci_alloc,
            eNB->ulsch[i]->harq_processes[harq_pid]->rar_alloc,
            eNB->ulsch[i]->harq_processes[harq_pid]->round,
            eNB->ulsch[i]->harq_processes[harq_pid]->first_rb,
            eNB->ulsch[i]->harq_processes[harq_pid]->nb_rb,
            eNB->ulsch[i]->harq_processes[harq_pid]->mcs,
            eNB->ulsch[i]->harq_processes[harq_pid]->TBS,
            eNB->ulsch[i]->harq_processes[harq_pid]->rvidx,
            eNB->ulsch[i]->cyclicShift,
            eNB->ulsch[i]->harq_processes[harq_pid]->n_DMRS2,
2980
            fp->pusch_config_common.ul_ReferenceSignalsPUSCH.cyclicShift,
2981
            nPRS,
2982 2983 2984 2985
            eNB->ulsch[i]->harq_processes[harq_pid]->O_ACK);
      eNB->pusch_stats_rb[i][(frame*10)+subframe] = eNB->ulsch[i]->harq_processes[harq_pid]->nb_rb;
      eNB->pusch_stats_round[i][(frame*10)+subframe] = eNB->ulsch[i]->harq_processes[harq_pid]->round;
      eNB->pusch_stats_mcs[i][(frame*10)+subframe] = eNB->ulsch[i]->harq_processes[harq_pid]->mcs;
2986
      start_meas(&eNB->ulsch_demodulation_stats);
2987

2988
      if (eNB->abstraction_flag==0) {
2989
        rx_ulsch(eNB,proc,
2990
                 eNB->UE_stats[i].sector,  // this is the effective sector id
2991
                 i,
2992
                 eNB->ulsch,
2993 2994
                 0);
      }
2995

2996 2997
#ifdef PHY_ABSTRACTION
      else {
2998
        rx_ulsch_emul(eNB,proc,
2999
                      eNB->UE_stats[i].sector,  // this is the effective sector id
3000 3001
                      i);
      }
3002 3003

#endif
3004
      stop_meas(&eNB->ulsch_demodulation_stats);
3005

3006

3007
      start_meas(&eNB->ulsch_decoding_stats);
3008

3009
      if (eNB->abstraction_flag == 0) {
3010
        ret = ulsch_decoding(eNB,proc,
3011 3012
                             i,
                             0, // control_only_flag
3013 3014
                             eNB->ulsch[i]->harq_processes[harq_pid]->V_UL_DAI,
			     eNB->ulsch[i]->harq_processes[harq_pid]->nb_rb>20 ? 1 : 0);
3015
      }
3016

3017
#ifdef PHY_ABSTRACTION
3018
      else {
3019 3020
        ret = ulsch_decoding_emul(eNB,
				  proc,
3021 3022 3023
                                  i,
                                  &rnti);
      }
3024

3025
#endif
3026
      stop_meas(&eNB->ulsch_decoding_stats);
3027

3028
      LOG_D(PHY,"[eNB %d][PUSCH %d] frame %d subframe %d RNTI %x RX power (%d,%d) RSSI (%d,%d) N0 (%d,%d) dB ACK (%d,%d), decoding iter %d\n",
3029
            eNB->Mod_id,harq_pid,
3030
            frame,subframe,
3031 3032 3033 3034 3035 3036 3037 3038 3039
            eNB->ulsch[i]->rnti,
            dB_fixed(eNB->pusch_vars[i]->ulsch_power[0]),
            dB_fixed(eNB->pusch_vars[i]->ulsch_power[1]),
            eNB->UE_stats[i].UL_rssi[0],
            eNB->UE_stats[i].UL_rssi[1],
            eNB->measurements->n0_power_dB[0],
            eNB->measurements->n0_power_dB[1],
            eNB->ulsch[i]->harq_processes[harq_pid]->o_ACK[0],
            eNB->ulsch[i]->harq_processes[harq_pid]->o_ACK[1],
3040
            ret);
3041

3042
      //compute the expected ULSCH RX power (for the stats)
3043
      eNB->ulsch[(uint32_t)i]->harq_processes[harq_pid]->delta_TF =
3044
        get_hundred_times_delta_IF_eNB(eNB,i,harq_pid, 0); // 0 means bw_factor is not considered
3045

3046
      eNB->UE_stats[i].ulsch_decoding_attempts[harq_pid][eNB->ulsch[i]->harq_processes[harq_pid]->round]++;
3047 3048
#ifdef DEBUG_PHY_PROC
      LOG_D(PHY,"[eNB %d][PUSCH %d] frame %d subframe %d UE %d harq_pid %d Clearing subframe_scheduling_flag\n",
3049
            eNB->Mod_id,harq_pid,frame,subframe,i,harq_pid);
3050
#endif
3051
      eNB->ulsch[i]->harq_processes[harq_pid]->subframe_scheduling_flag=0;
3052

3053
      if (eNB->ulsch[i]->harq_processes[harq_pid]->cqi_crc_status == 1) {
3054
#ifdef DEBUG_PHY_PROC
3055
        //if (((frame%10) == 0) || (frame < 50))
3056
        print_CQI(eNB->ulsch[i]->harq_processes[harq_pid]->o,eNB->ulsch[i]->harq_processes[harq_pid]->uci_format,0,fp->N_RB_DL);
3057
#endif
3058 3059 3060
        extract_CQI(eNB->ulsch[i]->harq_processes[harq_pid]->o,
                    eNB->ulsch[i]->harq_processes[harq_pid]->uci_format,
                    &eNB->UE_stats[i],
3061
                    fp->N_RB_DL,
3062
                    &rnti, &access_mode);
3063
        eNB->UE_stats[i].rank = eNB->ulsch[i]->harq_processes[harq_pid]->o_RI[0];
3064

3065
      }
3066

3067
      if (eNB->ulsch[i]->Msg3_flag == 1)
3068
	VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_ULSCH_MSG3,0);
3069

3070
      if (ret == (1+MAX_TURBO_ITERATIONS)) {
3071
        T(T_ENB_PHY_ULSCH_UE_NACK, T_INT(eNB->Mod_id), T_INT(frame), T_INT(subframe), T_INT(i), T_INT(eNB->ulsch[i]->rnti),
3072
          T_INT(harq_pid));
3073

3074 3075 3076 3077
        eNB->UE_stats[i].ulsch_round_errors[harq_pid][eNB->ulsch[i]->harq_processes[harq_pid]->round]++;
        eNB->ulsch[i]->harq_processes[harq_pid]->phich_active = 1;
        eNB->ulsch[i]->harq_processes[harq_pid]->phich_ACK = 0;
        eNB->ulsch[i]->harq_processes[harq_pid]->round++;
3078

3079
        LOG_D(PHY,"[eNB][PUSCH %d] Increasing to round %d\n",harq_pid,eNB->ulsch[i]->harq_processes[harq_pid]->round);
3080

3081
        if (eNB->ulsch[i]->Msg3_flag == 1) {
3082

3083
          LOG_D(PHY,"[eNB %d/%d][RAPROC] frame %d, subframe %d, UE %d: Error receiving ULSCH (Msg3), round %d/%d\n",
3084 3085
                eNB->Mod_id,
                eNB->CC_id,
3086
                frame,subframe, i,
3087
                eNB->ulsch[i]->harq_processes[harq_pid]->round-1,
3088
                fp->maxHARQ_Msg3Tx-1);
3089 3090
	  /*dump_ulsch(eNB,proc,i);
	    exit(-1);*/
3091

3092
	  LOG_D(PHY,"[eNB %d][PUSCH %d] frame %d subframe %d RNTI %x RX power (%d,%d) RSSI (%d,%d) N0 (%d,%d) dB ACK (%d,%d), decoding iter %d\n",
3093
		eNB->Mod_id,harq_pid,
3094
		frame,subframe,
3095 3096 3097 3098 3099 3100 3101 3102 3103
		eNB->ulsch[i]->rnti,
		dB_fixed(eNB->pusch_vars[i]->ulsch_power[0]),
		dB_fixed(eNB->pusch_vars[i]->ulsch_power[1]),
		eNB->UE_stats[i].UL_rssi[0],
		eNB->UE_stats[i].UL_rssi[1],
		eNB->measurements->n0_power_dB[0],
		eNB->measurements->n0_power_dB[1],
		eNB->ulsch[i]->harq_processes[harq_pid]->o_ACK[0],
		eNB->ulsch[i]->harq_processes[harq_pid]->o_ACK[1],
3104
		ret);
3105

3106
          if (eNB->ulsch[i]->harq_processes[harq_pid]->round ==
3107
              fp->maxHARQ_Msg3Tx) {
3108
            LOG_D(PHY,"[eNB %d][RAPROC] maxHARQ_Msg3Tx reached, abandoning RA procedure for UE %d\n",
3109
                  eNB->Mod_id, i);
3110
            eNB->UE_stats[i].mode = PRACH;
3111 3112 3113
	    if (eNB->mac_enabled==1) {
	      mac_xface->cancel_ra_proc(eNB->Mod_id,
					eNB->CC_id,
3114
					frame,
3115
					eNB->UE_stats[i].crnti);
3116
	    }
3117
            mac_phy_remove_ue(eNB->Mod_id,eNB->UE_stats[i].crnti);
3118

3119 3120
            eNB->ulsch[(uint32_t)i]->Msg3_active = 0;
            //eNB->ulsch[i]->harq_processes[harq_pid]->phich_active = 0;
3121 3122

          } else {
3123
            // activate retransmission for Msg3 (signalled to UE PHY by PHICH (not MAC/DCI)
3124
            eNB->ulsch[(uint32_t)i]->Msg3_active = 1;
3125

3126
            get_Msg3_alloc_ret(fp,
3127
                               subframe,
3128
                               frame,
3129 3130
                               &eNB->ulsch[i]->Msg3_frame,
                               &eNB->ulsch[i]->Msg3_subframe);
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3131

3132 3133 3134
            mac_xface->set_msg3_subframe(eNB->Mod_id, eNB->CC_id, frame, subframe, eNB->ulsch[i]->rnti,
                                         eNB->ulsch[i]->Msg3_frame, eNB->ulsch[i]->Msg3_subframe);

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3135 3136 3137
            T(T_ENB_PHY_MSG3_ALLOCATION, T_INT(eNB->Mod_id), T_INT(frame), T_INT(subframe),
              T_INT(i), T_INT(eNB->ulsch[i]->rnti), T_INT(0 /* 0 is for retransmission*/),
              T_INT(eNB->ulsch[i]->Msg3_frame), T_INT(eNB->ulsch[i]->Msg3_subframe));
3138
          }
3139 3140
          LOG_D(PHY,"[eNB] Frame %d, Subframe %d: Msg3 in error, i = %d \n", frame,subframe,i);
        } // This is Msg3 error
3141

3142 3143
        else { //normal ULSCH
          LOG_D(PHY,"[eNB %d][PUSCH %d] frame %d subframe %d UE %d Error receiving ULSCH, round %d/%d (ACK %d,%d)\n",
3144
                eNB->Mod_id,harq_pid,
3145
                frame,subframe, i,
3146 3147 3148 3149
                eNB->ulsch[i]->harq_processes[harq_pid]->round-1,
                eNB->ulsch[i]->Mlimit,
                eNB->ulsch[i]->harq_processes[harq_pid]->o_ACK[0],
                eNB->ulsch[i]->harq_processes[harq_pid]->o_ACK[1]);
3150 3151 3152

#if defined(MESSAGE_CHART_GENERATOR_PHY)
          MSC_LOG_RX_DISCARDED_MESSAGE(
3153 3154 3155 3156 3157 3158 3159
				       MSC_PHY_ENB,MSC_PHY_UE,
				       NULL,0,
				       "%05u:%02u ULSCH received rnti %x harq id %u round %d",
				       frame,subframe,
				       eNB->ulsch[i]->rnti,harq_pid,
				       eNB->ulsch[i]->harq_processes[harq_pid]->round-1
				       );
3160
#endif
3161

3162
          if (eNB->ulsch[i]->harq_processes[harq_pid]->round== eNB->ulsch[i]->Mlimit) {
3163
            LOG_D(PHY,"[eNB %d][PUSCH %d] frame %d subframe %d UE %d ULSCH Mlimit %d reached\n",
3164
                  eNB->Mod_id,harq_pid,
3165
                  frame,subframe, i,
3166
                  eNB->ulsch[i]->Mlimit);
3167

3168 3169 3170 3171
            eNB->ulsch[i]->harq_processes[harq_pid]->round=0;
            eNB->ulsch[i]->harq_processes[harq_pid]->phich_active=0;
            eNB->UE_stats[i].ulsch_errors[harq_pid]++;
            eNB->UE_stats[i].ulsch_consecutive_errors++;
3172

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3173 3174 3175 3176
	   /*if (eNB->ulsch[i]->harq_processes[harq_pid]->nb_rb > 20) {
		dump_ulsch(eNB,proc,i);
	 	exit(-1);
           }*/
3177
	    // indicate error to MAC
3178 3179 3180 3181 3182 3183 3184 3185 3186
	    if (eNB->mac_enabled == 1)
	      mac_xface->rx_sdu(eNB->Mod_id,
				eNB->CC_id,
				frame,subframe,
				eNB->ulsch[i]->rnti,
				NULL,
				0,
				harq_pid,
				&eNB->ulsch[i]->Msg3_flag);
3187 3188 3189 3190
          }
        }
      }  // ulsch in error
      else {
3191 3192 3193



3194
        T(T_ENB_PHY_ULSCH_UE_ACK, T_INT(eNB->Mod_id), T_INT(frame), T_INT(subframe), T_INT(i), T_INT(eNB->ulsch[i]->rnti),
3195 3196
          T_INT(harq_pid));

3197
        if (eNB->ulsch[i]->Msg3_flag == 1) {
3198
	  LOG_D(PHY,"[eNB %d][PUSCH %d] Frame %d subframe %d ULSCH received, setting round to 0, PHICH ACK\n",
3199
		eNB->Mod_id,harq_pid,
3200 3201
		frame,subframe);
	  LOG_D(PHY,"[eNB %d][PUSCH %d] frame %d subframe %d RNTI %x RX power (%d,%d) RSSI (%d,%d) N0 (%d,%d) dB ACK (%d,%d), decoding iter %d\n",
3202
		eNB->Mod_id,harq_pid,
3203
		frame,subframe,
3204 3205 3206 3207 3208 3209 3210 3211 3212
		eNB->ulsch[i]->rnti,
		dB_fixed(eNB->pusch_vars[i]->ulsch_power[0]),
		dB_fixed(eNB->pusch_vars[i]->ulsch_power[1]),
		eNB->UE_stats[i].UL_rssi[0],
		eNB->UE_stats[i].UL_rssi[1],
		eNB->measurements->n0_power_dB[0],
		eNB->measurements->n0_power_dB[1],
		eNB->ulsch[i]->harq_processes[harq_pid]->o_ACK[0],
		eNB->ulsch[i]->harq_processes[harq_pid]->o_ACK[1],
3213 3214 3215 3216
		ret);
	}
#if defined(MESSAGE_CHART_GENERATOR_PHY)
        MSC_LOG_RX_MESSAGE(
3217 3218 3219 3220 3221 3222
			   MSC_PHY_ENB,MSC_PHY_UE,
			   NULL,0,
			   "%05u:%02u ULSCH received rnti %x harq id %u",
			   frame,subframe,
			   eNB->ulsch[i]->rnti,harq_pid
			   );
3223
#endif
3224
        for (j=0; j<fp->nb_antennas_rx; j++)
3225
          //this is the RSSI per RB
3226
          eNB->UE_stats[i].UL_rssi[j] =
3227
	    
3228 3229
            dB_fixed(eNB->pusch_vars[i]->ulsch_power[j]*
                     (eNB->ulsch[i]->harq_processes[harq_pid]->nb_rb*12)/
3230
                     fp->ofdm_symbol_size) -
3231 3232
            eNB->rx_total_gain_dB -
            hundred_times_log10_NPRB[eNB->ulsch[i]->harq_processes[harq_pid]->nb_rb-1]/100 -
3233
            get_hundred_times_delta_IF_eNB(eNB,i,harq_pid, 0)/100;
3234
	    
3235 3236 3237 3238
        eNB->ulsch[i]->harq_processes[harq_pid]->phich_active = 1;
        eNB->ulsch[i]->harq_processes[harq_pid]->phich_ACK = 1;
        eNB->ulsch[i]->harq_processes[harq_pid]->round = 0;
        eNB->UE_stats[i].ulsch_consecutive_errors = 0;
3239

3240
        if (eNB->ulsch[i]->Msg3_flag == 1) {
3241
	  if (eNB->mac_enabled==1) {
3242

3243
	    LOG_I(PHY,"[eNB %d][RAPROC] Frame %d Terminating ra_proc for harq %d, UE %d\n",
3244
		  eNB->Mod_id,
3245
		  frame,harq_pid,i);
3246 3247 3248 3249 3250 3251 3252 3253 3254
	    if (eNB->mac_enabled)
	      mac_xface->rx_sdu(eNB->Mod_id,
				eNB->CC_id,
				frame,subframe,
				eNB->ulsch[i]->rnti,
				eNB->ulsch[i]->harq_processes[harq_pid]->b,
				eNB->ulsch[i]->harq_processes[harq_pid]->TBS>>3,
				harq_pid,
				&eNB->ulsch[i]->Msg3_flag);
3255 3256
	    
	    // one-shot msg3 detection by MAC: empty PDU (e.g. CRNTI)
3257 3258
	    if (eNB->ulsch[i]->Msg3_flag == 0 ) {
	      eNB->UE_stats[i].mode = PRACH;
3259 3260
	      mac_xface->cancel_ra_proc(eNB->Mod_id,
					eNB->CC_id,
3261
					frame,
3262 3263 3264
					eNB->UE_stats[i].crnti);
	      mac_phy_remove_ue(eNB->Mod_id,eNB->UE_stats[i].crnti);
	      eNB->ulsch[(uint32_t)i]->Msg3_active = 0;
3265 3266 3267
	    } // Msg3_flag == 0
	    
	  } // mac_enabled==1
3268

3269 3270
          eNB->UE_stats[i].mode = PUSCH;
          eNB->ulsch[i]->Msg3_flag = 0;
3271

3272
	  LOG_D(PHY,"[eNB %d][RAPROC] Frame %d : RX Subframe %d Setting UE %d mode to PUSCH\n",eNB->Mod_id,frame,subframe,i);
3273

3274
          for (k=0; k<8; k++) { //harq_processes
3275 3276 3277 3278
            for (j=0; j<eNB->dlsch[i][0]->Mlimit; j++) {
              eNB->UE_stats[i].dlsch_NAK[k][j]=0;
              eNB->UE_stats[i].dlsch_ACK[k][j]=0;
              eNB->UE_stats[i].dlsch_trials[k][j]=0;
3279
            }
3280

3281 3282 3283
            eNB->UE_stats[i].dlsch_l2_errors[k]=0;
            eNB->UE_stats[i].ulsch_errors[k]=0;
            eNB->UE_stats[i].ulsch_consecutive_errors=0;
3284

3285 3286 3287 3288 3289
            for (j=0; j<eNB->ulsch[i]->Mlimit; j++) {
              eNB->UE_stats[i].ulsch_decoding_attempts[k][j]=0;
              eNB->UE_stats[i].ulsch_decoding_attempts_last[k][j]=0;
              eNB->UE_stats[i].ulsch_round_errors[k][j]=0;
              eNB->UE_stats[i].ulsch_round_fer[k][j]=0;
3290
            }
3291 3292
          }

3293 3294 3295
          eNB->UE_stats[i].dlsch_sliding_cnt=0;
          eNB->UE_stats[i].dlsch_NAK_round0=0;
          eNB->UE_stats[i].dlsch_mcs_offset=0;
3296 3297 3298
        } // Msg3_flag==1
	else {  // Msg3_flag == 0

3299
#ifdef DEBUG_PHY_PROC
3300 3301
#ifdef DEBUG_ULSCH
          LOG_D(PHY,"[eNB] Frame %d, Subframe %d : ULSCH SDU (RX harq_pid %d) %d bytes:",frame,subframe,
3302
                harq_pid,eNB->ulsch[i]->harq_processes[harq_pid]->TBS>>3);
3303

3304 3305
          for (j=0; j<eNB->ulsch[i]->harq_processes[harq_pid]->TBS>>3; j++)
            LOG_T(PHY,"%x.",eNB->ulsch[i]->harq_processes[harq_pid]->b[j]);
3306 3307 3308

          LOG_T(PHY,"\n");
#endif
3309
#endif
3310

3311
	  if (eNB->mac_enabled==1) {
3312

3313 3314
	    mac_xface->rx_sdu(eNB->Mod_id,
			      eNB->CC_id,
3315
			      frame,subframe,
3316 3317 3318
			      eNB->ulsch[i]->rnti,
			      eNB->ulsch[i]->harq_processes[harq_pid]->b,
			      eNB->ulsch[i]->harq_processes[harq_pid]->TBS>>3,
3319 3320
			      harq_pid,
			      NULL);
3321

3322
#ifdef LOCALIZATION
3323 3324
	    start_meas(&eNB->localization_stats);
	    aggregate_eNB_UE_localization_stats(eNB,
3325 3326 3327
						i,
						frame,
						subframe,
3328 3329
						get_hundred_times_delta_IF_eNB(eNB,i,harq_pid, 1)/100);
	    stop_meas(&eNB->localization_stats);
3330
#endif
3331 3332 3333
	    
	  } // mac_enabled==1
        } // Msg3_flag == 0
3334

3335
        // estimate timing advance for MAC
3336
        if (eNB->abstraction_flag == 0) {
3337
          sync_pos = lte_est_timing_advance_pusch(eNB,i);
3338
          eNB->UE_stats[i].timing_advance_update = sync_pos - fp->nb_prefix_samples/4; //to check
3339
        }
3340

3341 3342
#ifdef DEBUG_PHY_PROC
        LOG_D(PHY,"[eNB %d] frame %d, subframe %d: user %d: timing advance = %d\n",
3343
              eNB->Mod_id,
3344 3345
              frame, subframe,
              i,
3346
              eNB->UE_stats[i].timing_advance_update);
3347
#endif
3348 3349


3350 3351 3352
      }  // ulsch not in error

      // process HARQ feedback
3353
#ifdef DEBUG_PHY_PROC
3354
      LOG_D(PHY,"[eNB %d][PDSCH %x] Frame %d subframe %d, Processing HARQ feedback for UE %d (after PUSCH)\n",eNB->Mod_id,
3355
            eNB->dlsch[i][0]->rnti,
3356 3357
            frame,subframe,
            i);
3358
#endif
3359
      process_HARQ_feedback(i,
3360
                            eNB,proc,
3361 3362 3363 3364 3365 3366 3367
                            1, // pusch_flag
                            0,
                            0,
                            0);

#ifdef DEBUG_PHY_PROC
      LOG_D(PHY,"[eNB %d] Frame %d subframe %d, sect %d: received ULSCH harq_pid %d for UE %d, ret = %d, CQI CRC Status %d, ACK %d,%d, ulsch_errors %d/%d\n",
3368
            eNB->Mod_id,frame,subframe,
3369
            eNB->UE_stats[i].sector,
3370 3371 3372
            harq_pid,
            i,
            ret,
3373 3374 3375 3376 3377
            eNB->ulsch[i]->harq_processes[harq_pid]->cqi_crc_status,
            eNB->ulsch[i]->harq_processes[harq_pid]->o_ACK[0],
            eNB->ulsch[i]->harq_processes[harq_pid]->o_ACK[1],
            eNB->UE_stats[i].ulsch_errors[harq_pid],
            eNB->UE_stats[i].ulsch_decoding_attempts[harq_pid][0]);
3378 3379 3380 3381
#endif
      
      // dump stats to VCD
      if (i==0) {
3382 3383 3384
	VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_UE0_MCS0+harq_pid,eNB->pusch_stats_mcs[0][(frame*10)+subframe]);
	VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_UE0_RB0+harq_pid,eNB->pusch_stats_rb[0][(frame*10)+subframe]);
	VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_UE0_ROUND0+harq_pid,eNB->pusch_stats_round[0][(frame*10)+subframe]);
3385
	VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_UE0_RSSI0+harq_pid,dB_fixed(eNB->pusch_vars[0]->ulsch_power[0]));
3386 3387
	VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_UE0_RES0+harq_pid,ret);
	VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_UE0_SFN0+harq_pid,(frame*10)+subframe);
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Lionel Gauthier committed
3388
      }
3389
    } // ulsch[0] && ulsch[0]->rnti>0 && ulsch[0]->subframe_scheduling_flag == 1
3390 3391


3392
    // update ULSCH statistics for tracing
3393
    if ((frame % 100 == 0) && (subframe == 4)) {
3394
      for (harq_idx=0; harq_idx<8; harq_idx++) {
3395 3396 3397 3398 3399 3400 3401 3402
        for (round=0; round<eNB->ulsch[i]->Mlimit; round++) {
          if ((eNB->UE_stats[i].ulsch_decoding_attempts[harq_idx][round] -
               eNB->UE_stats[i].ulsch_decoding_attempts_last[harq_idx][round]) != 0) {
            eNB->UE_stats[i].ulsch_round_fer[harq_idx][round] =
              (100*(eNB->UE_stats[i].ulsch_round_errors[harq_idx][round] -
                    eNB->UE_stats[i].ulsch_round_errors_last[harq_idx][round]))/
              (eNB->UE_stats[i].ulsch_decoding_attempts[harq_idx][round] -
               eNB->UE_stats[i].ulsch_decoding_attempts_last[harq_idx][round]);
3403
          } else {
3404
            eNB->UE_stats[i].ulsch_round_fer[harq_idx][round] = 0;
3405 3406
          }

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          eNB->UE_stats[i].ulsch_decoding_attempts_last[harq_idx][round] =
            eNB->UE_stats[i].ulsch_decoding_attempts[harq_idx][round];
          eNB->UE_stats[i].ulsch_round_errors_last[harq_idx][round] =
            eNB->UE_stats[i].ulsch_round_errors[harq_idx][round];
3411
        }
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      }
    }
3414

Florian Kaltenberger's avatar
Florian Kaltenberger committed
3415
    if ((frame % 100 == 0) && (subframe==4)) {
3416
      eNB->UE_stats[i].dlsch_bitrate = (eNB->UE_stats[i].total_TBS -
3417
					eNB->UE_stats[i].total_TBS_last);
3418

3419
      eNB->UE_stats[i].total_TBS_last = eNB->UE_stats[i].total_TBS;
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    }
3421

3422
    // CBA (non-LTE)
3423
    cba_procedures(eNB,proc,i,harq_pid);
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  } // loop i=0 ... NUMBER_OF_UE_MAX-1

3426
  if (eNB->abstraction_flag == 0) {
3427
    lte_eNB_I0_measurements(eNB,
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			    subframe,
			    0,
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			    eNB->first_run_I0_measurements);
    eNB->first_run_I0_measurements = 0;
3432
  }
3433

3434
#ifdef PHY_ABSTRACTION
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  else {
    lte_eNB_I0_measurements_emul(eNB,
				 0);
  }
3439

3440
#endif
3441
  //}
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#ifdef EMOS
3444
  phy_procedures_emos_eNB_RX(subframe,eNB);
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#endif

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#if defined(FLEXRAN_AGENT_SB_IF)
#ifndef DISABLE_SF_TRIGGER
  //Send subframe trigger to the controller
  if (mac_agent_registered[eNB->Mod_id]) {
    agent_mac_xface[eNB->Mod_id]->flexran_agent_send_sf_trigger(eNB->Mod_id);
  }
#endif
#endif

Raymond Knopp's avatar
Raymond Knopp committed
3456
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_ENB_RX_UESPEC+offset, 0 );
3457

3458
  stop_meas(&eNB->phy_proc_rx);
3459

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}

#undef DEBUG_PHY_PROC

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#ifdef Rel10
int phy_procedures_RN_eNB_TX(unsigned char last_slot, unsigned char next_slot, relaying_type_t r_type)
{

3468
  int do_proc=0;// do nothing
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  switch(r_type) {
3471
  case no_relay:
3472
    do_proc= no_relay; // perform the normal eNB operation
3473
    break;
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3475
  case multicast_relay:
3476
    if (((next_slot >>1) < 6) || ((next_slot >>1) > 8))
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      do_proc = 0; // do nothing
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    else // SF#6, SF#7 and SF#8
      do_proc = multicast_relay; // do PHY procedures eNB TX

3481
    break;
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  default: // should'not be here
    LOG_W(PHY,"Not supported relay type %d, do nothing\n", r_type);
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    do_proc=0;
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    break;
  }
3488

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  return do_proc;
}
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#endif