eNB_scheduler_dlsch.c 75.3 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
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 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
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 * 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 eNB_scheduler_dlsch.c
 * \brief procedures related to eNB for the DLSCH transport channel
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 * \author  Navid Nikaein and Raymond Knopp
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 * \date 2010 - 2014
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 * \email: navid.nikaein@eurecom.fr
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 * \version 1.0
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 * @ingroup _mac

 */

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

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

#include "LAYER2/MAC/defs.h"
#include "LAYER2/MAC/proto.h"
#include "LAYER2/MAC/extern.h"
#include "UTIL/LOG/log.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
#include "UTIL/OPT/opt.h"
#include "OCG.h"
#include "OCG_extern.h"

#include "RRC/LITE/extern.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"

//#include "LAYER2/MAC/pre_processor.c"
#include "pdcp.h"

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#include "SIMULATION/TOOLS/defs.h"	// for taus
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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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#include "ENB_APP/flexran_agent_defs.h"
#include "flexran_agent_ran_api.h"
#include "header.pb-c.h"
#include "flexran.pb-c.h"
#include <dlfcn.h>

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#include "T.h"

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#define ENABLE_MAC_PAYLOAD_DEBUG
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//#define DEBUG_eNB_SCHEDULER 1
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extern RAN_CONTEXT_t RC;
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extern uint8_t nfapi_mode;
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// number of active slices for  past and current time
int n_active_slices = 1;
int n_active_slices_current = 1;

// RB share for each slice for past and current time
float avg_slice_percentage=0.25;
float slice_percentage[MAX_NUM_SLICES] = {1.0, 0.0, 0.0, 0.0};
float slice_percentage_current[MAX_NUM_SLICES] = {1.0, 0.0, 0.0, 0.0};
float total_slice_percentage = 0;
float total_slice_percentage_current = 0;

// MAX MCS for each slice for past and current time
int slice_maxmcs[MAX_NUM_SLICES] = { 28, 28, 28, 28 };
int slice_maxmcs_current[MAX_NUM_SLICES] = { 28, 28, 28, 28 };

int update_dl_scheduler[MAX_NUM_SLICES] = { 1, 1, 1, 1 };
int update_dl_scheduler_current[MAX_NUM_SLICES] = { 1, 1, 1, 1 };

// name of available scheduler
char *dl_scheduler_type[MAX_NUM_SLICES] =
  { "schedule_ue_spec",
    "schedule_ue_spec",
    "schedule_ue_spec",
    "schedule_ue_spec"
  };

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// The lists of criteria that enforce the sorting policies of the slices
uint32_t sorting_policy[MAX_NUM_SLICES] = {0x01234, 0x01234, 0x01234, 0x01234};
uint32_t sorting_policy_current[MAX_NUM_SLICES] = {0x01234, 0x01234, 0x01234, 0x01234};

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// pointer to the slice specific scheduler
slice_scheduler_dl slice_sched_dl[MAX_NUM_SLICES] = {0};

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//------------------------------------------------------------------------------
void
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add_ue_dlsch_info(module_id_t module_idP,
		  int CC_id,
		  int UE_id, sub_frame_t subframeP, UE_DLSCH_STATUS status)
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//------------------------------------------------------------------------------
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{
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  //LOG_D(MAC, "%s(module_idP:%d, CC_id:%d, UE_id:%d, subframeP:%d, status:%d) serving_num:%d rnti:%x\n", __FUNCTION__, module_idP, CC_id, UE_id, subframeP, status, eNB_dlsch_info[module_idP][CC_id][UE_id].serving_num, UE_RNTI(module_idP,UE_id));
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  eNB_dlsch_info[module_idP][CC_id][UE_id].rnti =
    UE_RNTI(module_idP, UE_id);
  //  eNB_dlsch_info[module_idP][CC_id][ue_mod_idP].weight           = weight;
  eNB_dlsch_info[module_idP][CC_id][UE_id].subframe = subframeP;
  eNB_dlsch_info[module_idP][CC_id][UE_id].status = status;
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  eNB_dlsch_info[module_idP][CC_id][UE_id].serving_num++;
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}

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//------------------------------------------------------------------------------
int
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schedule_next_dlue(module_id_t module_idP, int CC_id,
		   sub_frame_t subframeP)
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//------------------------------------------------------------------------------
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{
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  int next_ue;
  UE_list_t *UE_list = &RC.mac[module_idP]->UE_list;
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  for (next_ue = UE_list->head; next_ue >= 0;
       next_ue = UE_list->next[next_ue]) {
    if (eNB_dlsch_info[module_idP][CC_id][next_ue].status ==
	S_DL_WAITING) {
      return next_ue;
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    }
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  }
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  for (next_ue = UE_list->head; next_ue >= 0;
       next_ue = UE_list->next[next_ue]) {
    if (eNB_dlsch_info[module_idP][CC_id][next_ue].status == S_DL_BUFFERED) {
      eNB_dlsch_info[module_idP][CC_id][next_ue].status = S_DL_WAITING;
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    }
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  }
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  return (-1);		//next_ue;
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}

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//------------------------------------------------------------------------------
unsigned char
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generate_dlsch_header(unsigned char *mac_header,
		      unsigned char num_sdus,
		      unsigned short *sdu_lengths,
		      unsigned char *sdu_lcids,
		      unsigned char drx_cmd,
		      unsigned short timing_advance_cmd,
		      unsigned char *ue_cont_res_id,
		      unsigned char short_padding,
		      unsigned short post_padding)
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//------------------------------------------------------------------------------
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{
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  SCH_SUBHEADER_FIXED *mac_header_ptr = (SCH_SUBHEADER_FIXED *) mac_header;
  uint8_t first_element = 0, last_size = 0, i;
  uint8_t mac_header_control_elements[16], *ce_ptr;
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  ce_ptr = &mac_header_control_elements[0];
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  // compute header components
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  if ((short_padding == 1) || (short_padding == 2)) {
    mac_header_ptr->R = 0;
    mac_header_ptr->E = 0;
    mac_header_ptr->LCID = SHORT_PADDING;
    first_element = 1;
    last_size = 1;
  }

  if (short_padding == 2) {
    mac_header_ptr->E = 1;
    mac_header_ptr++;
    mac_header_ptr->R = 0;
    mac_header_ptr->E = 0;
    mac_header_ptr->LCID = SHORT_PADDING;
    last_size = 1;
  }
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  if (drx_cmd != 255) {
    if (first_element > 0) {
      mac_header_ptr->E = 1;
      mac_header_ptr++;
    } else {
      first_element = 1;
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    }
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    mac_header_ptr->R = 0;
    mac_header_ptr->E = 0;
    mac_header_ptr->LCID = DRX_CMD;
    last_size = 1;
  }
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  if (timing_advance_cmd != 31) {
    if (first_element > 0) {
      mac_header_ptr->E = 1;
      mac_header_ptr++;
    } else {
      first_element = 1;
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    }
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    mac_header_ptr->R = 0;
    mac_header_ptr->E = 0;
    mac_header_ptr->LCID = TIMING_ADV_CMD;
    last_size = 1;
    //    msg("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
    ((TIMING_ADVANCE_CMD *) ce_ptr)->R = 0;
    AssertFatal(timing_advance_cmd < 64,
		"timing_advance_cmd %d > 63\n", timing_advance_cmd);
    ((TIMING_ADVANCE_CMD *) ce_ptr)->TA = timing_advance_cmd;	//(timing_advance_cmd+31)&0x3f;
    LOG_D(MAC, "timing advance =%d (%d)\n", timing_advance_cmd,
	  ((TIMING_ADVANCE_CMD *) ce_ptr)->TA);
    ce_ptr += sizeof(TIMING_ADVANCE_CMD);
    //msg("offset %d\n",ce_ptr-mac_header_control_elements);
  }
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  if (ue_cont_res_id) {
    if (first_element > 0) {
      mac_header_ptr->E = 1;
      /*
	printf("[eNB][MAC] last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
	((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
	((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
	((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
      */
      mac_header_ptr++;
    } else {
      first_element = 1;
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    }
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    mac_header_ptr->R = 0;
    mac_header_ptr->E = 0;
    mac_header_ptr->LCID = UE_CONT_RES;
    last_size = 1;
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    LOG_T(MAC,
	  "[eNB ][RAPROC] Generate contention resolution msg: %x.%x.%x.%x.%x.%x\n",
	  ue_cont_res_id[0], ue_cont_res_id[1], ue_cont_res_id[2],
	  ue_cont_res_id[3], ue_cont_res_id[4], ue_cont_res_id[5]);
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    memcpy(ce_ptr, ue_cont_res_id, 6);
    ce_ptr += 6;
    // msg("(cont_res) : offset %d\n",ce_ptr-mac_header_control_elements);
  }
  //msg("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);

  for (i = 0; i < num_sdus; i++) {
    LOG_T(MAC, "[eNB] Generate DLSCH header num sdu %d len sdu %d\n",
	  num_sdus, sdu_lengths[i]);

    if (first_element > 0) {
      mac_header_ptr->E = 1;
      /*msg("last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
	((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
	((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
	((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
      */
      mac_header_ptr += last_size;
      //msg("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
    } else {
      first_element = 1;
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    }
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    if (sdu_lengths[i] < 128) {
      ((SCH_SUBHEADER_SHORT *) mac_header_ptr)->R = 0;
      ((SCH_SUBHEADER_SHORT *) mac_header_ptr)->E = 0;
      ((SCH_SUBHEADER_SHORT *) mac_header_ptr)->F = 0;
      ((SCH_SUBHEADER_SHORT *) mac_header_ptr)->LCID = sdu_lcids[i];
      ((SCH_SUBHEADER_SHORT *) mac_header_ptr)->L = (unsigned char) sdu_lengths[i];
      last_size = 2;
    } else {
      ((SCH_SUBHEADER_LONG *) mac_header_ptr)->R = 0;
      ((SCH_SUBHEADER_LONG *) mac_header_ptr)->E = 0;
      ((SCH_SUBHEADER_LONG *) mac_header_ptr)->F = 1;
      ((SCH_SUBHEADER_LONG *) mac_header_ptr)->LCID = sdu_lcids[i];
      ((SCH_SUBHEADER_LONG *) mac_header_ptr)->L_MSB = ((unsigned short) sdu_lengths[i] >> 8) & 0x7f;
      ((SCH_SUBHEADER_LONG *) mac_header_ptr)->L_LSB = (unsigned short) sdu_lengths[i] & 0xff;
      ((SCH_SUBHEADER_LONG *) mac_header_ptr)->padding = 0x00;
      last_size = 3;
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#ifdef DEBUG_HEADER_PARSING
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      LOG_D(MAC,
	    "[eNB] generate long sdu, size %x (MSB %x, LSB %x)\n",
	    sdu_lengths[i],
	    ((SCH_SUBHEADER_LONG *) mac_header_ptr)->L_MSB,
	    ((SCH_SUBHEADER_LONG *) mac_header_ptr)->L_LSB);
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#endif
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    }
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  }
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  /*
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    printf("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
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    printf("last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
    ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
    ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
    ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
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    if (((SCH_SUBHEADER_FIXED*)mac_header_ptr)->LCID < UE_CONT_RES) {
    if (((SCH_SUBHEADER_SHORT*)mac_header_ptr)->F == 0)
    printf("F = 0, sdu len (L field) %d\n",(((SCH_SUBHEADER_SHORT*)mac_header_ptr)->L));
    else
    printf("F = 1, sdu len (L field) %d\n",(((SCH_SUBHEADER_LONG*)mac_header_ptr)->L));
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    }
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  */
  if (post_padding > 0) {	// we have lots of padding at the end of the packet
    mac_header_ptr->E = 1;
    mac_header_ptr += last_size;
    // add a padding element
    mac_header_ptr->R = 0;
    mac_header_ptr->E = 0;
    mac_header_ptr->LCID = SHORT_PADDING;
    mac_header_ptr++;
  } else {			// no end of packet padding
    // last SDU subhead is of fixed type (sdu length implicitly to be computed at UE)
    mac_header_ptr++;
  }
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  //msg("After subheaders %d\n",(uint8_t*)mac_header_ptr - mac_header);

  if ((ce_ptr - mac_header_control_elements) > 0) {
    // printf("Copying %d bytes for control elements\n",ce_ptr-mac_header_control_elements);
    memcpy((void *) mac_header_ptr, mac_header_control_elements,
	   ce_ptr - mac_header_control_elements);
    mac_header_ptr +=
      (unsigned char) (ce_ptr - mac_header_control_elements);
  }
  //msg("After CEs %d\n",(uint8_t*)mac_header_ptr - mac_header);

  return ((unsigned char *) mac_header_ptr - mac_header);
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}

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//------------------------------------------------------------------------------
void
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set_ul_DAI(int module_idP, int UE_idP, int CC_idP, int frameP,
	   int subframeP)
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//------------------------------------------------------------------------------
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{

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  eNB_MAC_INST *eNB = RC.mac[module_idP];
  UE_list_t *UE_list = &eNB->UE_list;
  unsigned char DAI;
  COMMON_channels_t *cc = &eNB->common_channels[CC_idP];
  if (cc->tdd_Config != NULL) {	//TDD
    DAI = (UE_list->UE_template[CC_idP][UE_idP].DAI - 1) & 3;
    LOG_D(MAC,
	  "[eNB %d] CC_id %d Frame %d, subframe %d: DAI %d for UE %d\n",
	  module_idP, CC_idP, frameP, subframeP, DAI, UE_idP);
    // Save DAI for Format 0 DCI

    switch (cc->tdd_Config->subframeAssignment) {
    case 0:
      //      if ((subframeP==0)||(subframeP==1)||(subframeP==5)||(subframeP==6))
      break;
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    case 1:
      switch (subframeP) {
      case 1:
	UE_list->UE_template[CC_idP][UE_idP].DAI_ul[7] = DAI;
	break;
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      case 4:
	UE_list->UE_template[CC_idP][UE_idP].DAI_ul[8] = DAI;
	break;
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      case 6:
	UE_list->UE_template[CC_idP][UE_idP].DAI_ul[2] = DAI;
	break;
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      case 9:
	UE_list->UE_template[CC_idP][UE_idP].DAI_ul[3] = DAI;
	break;
      }
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    case 2:
      //      if ((subframeP==3)||(subframeP==8))
      //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
      break;
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    case 3:
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      //if ((subframeP==6)||(subframeP==8)||(subframeP==0)) {
      //  LOG_D(MAC,"schedule_ue_spec: setting UL DAI to %d for subframeP %d => %d\n",DAI,subframeP, ((subframeP+8)%10)>>1);
      //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul[((subframeP+8)%10)>>1] = DAI;
      //}
      switch (subframeP) {
      case 5:
      case 6:
      case 1:
	UE_list->UE_template[CC_idP][UE_idP].DAI_ul[2] = DAI;
	break;
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      case 7:
      case 8:
	UE_list->UE_template[CC_idP][UE_idP].DAI_ul[3] = DAI;
	break;
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      case 9:
      case 0:
	UE_list->UE_template[CC_idP][UE_idP].DAI_ul[4] = DAI;
	break;
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      default:
	break;
      }

      break;

    case 4:
      //      if ((subframeP==8)||(subframeP==9))
      //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
      break;

    case 5:
      //      if (subframeP==8)
      //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
      break;

    case 6:
      //      if ((subframeP==1)||(subframeP==4)||(subframeP==6)||(subframeP==9))
      //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
      break;

    default:
      break;
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    }
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  }
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}

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//------------------------------------------------------------------------------
void
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schedule_dlsch(module_id_t module_idP,
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	        frame_t frameP, sub_frame_t subframeP, int *mbsfn_flag)
//------------------------------------------------------------------------------{
{

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  int i = 0;
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  total_slice_percentage=0;
  avg_slice_percentage=1.0/n_active_slices;

  // reset the slice percentage for inactive slices
  for (i = n_active_slices; i< MAX_NUM_SLICES; i++) {
    slice_percentage[i]=0;
  }
  for (i = 0; i < n_active_slices; i++) {
    if (slice_percentage[i] < 0 ){
      LOG_W(MAC, "[eNB %d] frame %d subframe %d:invalid slice %d percentage %f. resetting to zero",
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	    module_idP, frameP, subframeP, i, slice_percentage[i]);
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      slice_percentage[i]=0;
    }
    total_slice_percentage+=slice_percentage[i];
  }

  for (i = 0; i < n_active_slices; i++) {

    // Load any updated functions
    if (update_dl_scheduler[i] > 0 ) {
      slice_sched_dl[i] = dlsym(NULL, dl_scheduler_type[i]);
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      update_dl_scheduler[i] = 0 ;
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      update_dl_scheduler_current[i] = 0;
      LOG_N(MAC,"update dl scheduler slice %d\n", i);
    }

    if (total_slice_percentage <= 1.0){ // the new total RB share is within the range

      // check if the number of slices has changed, and log
      if (n_active_slices_current != n_active_slices ){
	if ((n_active_slices > 0) && (n_active_slices <= MAX_NUM_SLICES)) {
	  LOG_N(MAC,"[eNB %d]frame %d subframe %d: number of active DL slices has changed: %d-->%d\n",
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		module_idP, frameP, subframeP, n_active_slices_current, n_active_slices);
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	  n_active_slices_current = n_active_slices;

	} else {
	  LOG_W(MAC,"invalid number of DL slices %d, revert to the previous value %d\n",n_active_slices, n_active_slices_current);
	  n_active_slices = n_active_slices_current;
	}
      }

      // check if the slice rb share has changed, and log the console
      if (slice_percentage_current[i] != slice_percentage[i]){ // new slice percentage
	LOG_N(MAC,"[eNB %d][SLICE %d][DL] frame %d subframe %d: total percentage %f-->%f, slice RB percentage has changed: %f-->%f\n",
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	      module_idP, i, frameP, subframeP, total_slice_percentage_current, total_slice_percentage, slice_percentage_current[i], slice_percentage[i]);
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	total_slice_percentage_current= total_slice_percentage;
	slice_percentage_current[i] = slice_percentage[i];

      }

      // check if the slice max MCS, and log the console
      if (slice_maxmcs_current[i] != slice_maxmcs[i]){
	if ((slice_maxmcs[i] >= 0) && (slice_maxmcs[i] < 29)){
	  LOG_N(MAC,"[eNB %d][SLICE %d][DL] frame %d subframe %d: slice MAX MCS has changed: %d-->%d\n",
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		module_idP, i, frameP, subframeP, slice_maxmcs_current[i], slice_maxmcs[i]);
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	  slice_maxmcs_current[i] = slice_maxmcs[i];
	} else {
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	  LOG_W(MAC,"[eNB %d][SLICE %d][DL] invalid slice max mcs %d, revert the previous value %d\n",module_idP, i, slice_maxmcs[i],slice_maxmcs_current[i]);
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	  slice_maxmcs[i]= slice_maxmcs_current[i];
	}
      }

      // check if a new scheduler, and log the console
      if (update_dl_scheduler_current[i] != update_dl_scheduler[i]){
	LOG_N(MAC,"[eNB %d][SLICE %d][DL] frame %d subframe %d: DL scheduler for this slice is updated: %s \n",
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	      module_idP, i, frameP, subframeP, dl_scheduler_type[i]);
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	update_dl_scheduler_current[i] = update_dl_scheduler[i];
      }

    } else {
      // here we can correct the values, e.g. reduce proportionally

      if (n_active_slices == n_active_slices_current){
	LOG_W(MAC,"[eNB %d][SLICE %d][DL] invalid total RB share (%f->%f), reduce proportionally the RB share by 0.1\n",
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	      module_idP, i, total_slice_percentage_current, total_slice_percentage);
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	if (slice_percentage[i] >= avg_slice_percentage){
	  slice_percentage[i]-=0.1;
	  total_slice_percentage-=0.1;
	}
      } else {
	LOG_W(MAC,"[eNB %d][SLICE %d][DL] invalid total RB share (%f->%f), revert the number of slice to its previous value (%d->%d)\n",
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	      module_idP, i, total_slice_percentage_current, total_slice_percentage,
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	      n_active_slices, n_active_slices_current );
	n_active_slices = n_active_slices_current;
	slice_percentage[i] = slice_percentage_current[i];
      }
    }

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    // Check for new sorting policy
    if (sorting_policy_current[i] != sorting_policy[i]) {
      LOG_N(MAC,"[eNB %d][SLICE %d][DL] frame %d subframe %d: UE sorting policy has changed (%x-->%x)\n",
            module_idP, i, frameP, subframeP, sorting_policy_current[i], sorting_policy[i]);
      sorting_policy_current[i] = sorting_policy[i];
    }

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    // Run each enabled slice-specific schedulers one by one
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    slice_sched_dl[i](module_idP, i, frameP, subframeP, mbsfn_flag/*, dl_info*/);
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  }

}
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// changes to pre-processor for eMTC

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//------------------------------------------------------------------------------
void
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schedule_ue_spec(module_id_t module_idP,slice_id_t slice_idP,
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		 frame_t frameP, sub_frame_t subframeP, int *mbsfn_flag)
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//------------------------------------------------------------------------------
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{
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Raymond Knopp committed
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  uint8_t CC_id;
  int UE_id;
  unsigned char aggregation;
  mac_rlc_status_resp_t rlc_status;
  unsigned char header_len_dcch = 0, header_len_dcch_tmp = 0;
  unsigned char header_len_dtch = 0, header_len_dtch_tmp =
    0, header_len_dtch_last = 0;
  unsigned char ta_len = 0;
  unsigned char sdu_lcids[NB_RB_MAX], lcid, offset, num_sdus = 0;
  uint16_t nb_rb, nb_rb_temp, nb_available_rb;
  uint16_t TBS, j, sdu_lengths[NB_RB_MAX], rnti, padding =
    0, post_padding = 0;
  unsigned char dlsch_buffer[MAX_DLSCH_PAYLOAD_BYTES];
  unsigned char round = 0;
  unsigned char harq_pid = 0;
  eNB_UE_STATS *eNB_UE_stats = NULL;
  uint16_t sdu_length_total = 0;

  eNB_MAC_INST *eNB = RC.mac[module_idP];
  COMMON_channels_t *cc = eNB->common_channels;
  UE_list_t *UE_list = &eNB->UE_list;
  int continue_flag = 0;
  int32_t normalized_rx_power, target_rx_power;
  int32_t tpc = 1;
  static int32_t tpc_accumulated = 0;
  UE_sched_ctrl *ue_sched_ctl;
  int mcs;
  int i;
  int min_rb_unit[MAX_NUM_CCs];
  int N_RB_DL[MAX_NUM_CCs];
  int total_nb_available_rb[MAX_NUM_CCs];
  int N_RBG[MAX_NUM_CCs];
  nfapi_dl_config_request_body_t *dl_req;
  nfapi_dl_config_request_pdu_t *dl_config_pdu;
  int tdd_sfa;
  int ta_update;
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#if 0
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  if (UE_list->head == -1) {
    return;
  }
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#endif
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  start_meas(&eNB->schedule_dlsch);
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
    (VCD_SIGNAL_DUMPER_FUNCTIONS_SCHEDULE_DLSCH, VCD_FUNCTION_IN);
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  // for TDD: check that we have to act here, otherwise return
  if (cc[0].tdd_Config) {
    tdd_sfa = cc[0].tdd_Config->subframeAssignment;
    switch (subframeP) {
    case 0:
      // always continue
      break;
    case 1:
      return;
      break;
    case 2:
      return;
      break;
    case 3:
      if ((tdd_sfa != 2) && (tdd_sfa != 5))
	return;
      break;
    case 4:
      if ((tdd_sfa != 1) && (tdd_sfa != 2) && (tdd_sfa != 4)
	  && (tdd_sfa != 5))
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	return;
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      break;
    case 5:
      break;
    case 6:
    case 7:
      if ((tdd_sfa != 1) && (tdd_sfa != 2) && (tdd_sfa != 4)
	  && (tdd_sfa != 5))
	return;
      break;
    case 8:
      if ((tdd_sfa != 2) && (tdd_sfa != 3) && (tdd_sfa != 4)
	  && (tdd_sfa != 5))
	return;
      break;
    case 9:
      if ((tdd_sfa != 1) && (tdd_sfa != 3) && (tdd_sfa != 4)
	  && (tdd_sfa != 6))
	return;
      break;
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    }
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  }
  //weight = get_ue_weight(module_idP,UE_id);
  aggregation = 2;
  for (CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
    N_RB_DL[CC_id] = to_prb(cc[CC_id].mib->message.dl_Bandwidth);
    min_rb_unit[CC_id] = get_min_rb_unit(module_idP, CC_id);
    // get number of PRBs less those used by common channels
    total_nb_available_rb[CC_id] = N_RB_DL[CC_id];
    for (i = 0; i < N_RB_DL[CC_id]; i++)
      if (cc[CC_id].vrb_map[i] != 0)
	total_nb_available_rb[CC_id]--;

    N_RBG[CC_id] = to_rbg(cc[CC_id].mib->message.dl_Bandwidth);

    // store the global enb stats:
    eNB->eNB_stats[CC_id].num_dlactive_UEs = UE_list->num_UEs;
    eNB->eNB_stats[CC_id].available_prbs = total_nb_available_rb[CC_id];
    eNB->eNB_stats[CC_id].total_available_prbs += total_nb_available_rb[CC_id];
    eNB->eNB_stats[CC_id].dlsch_bytes_tx = 0;
    eNB->eNB_stats[CC_id].dlsch_pdus_tx = 0;
  }
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  /// CALLING Pre_Processor for downlink scheduling (Returns estimation of RBs required by each UE and the allocation on sub-band)
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  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
      (VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_PREPROCESSOR, VCD_FUNCTION_IN);
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  start_meas(&eNB->schedule_dlsch_preprocessor);
  dlsch_scheduler_pre_processor(module_idP,
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                                slice_idP,
                                frameP,
                                subframeP,
                                N_RBG,
                                mbsfn_flag);
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  stop_meas(&eNB->schedule_dlsch_preprocessor);
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
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      (VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_PREPROCESSOR, VCD_FUNCTION_OUT);
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  for (CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
    LOG_D(MAC, "doing schedule_ue_spec for CC_id %d\n", CC_id);
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    dl_req = &eNB->DL_req[CC_id].dl_config_request_body;
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    if (mbsfn_flag[CC_id] > 0)
      continue;
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    for (UE_id = UE_list->head; UE_id >= 0;
	 UE_id = UE_list->next[UE_id]) {
      continue_flag = 0;	// reset the flag to allow allocation for the remaining UEs
      rnti = UE_RNTI(module_idP, UE_id);
      eNB_UE_stats = &UE_list->eNB_UE_stats[CC_id][UE_id];
      ue_sched_ctl = &UE_list->UE_sched_ctrl[UE_id];
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      if (rnti == NOT_A_RNTI) {
	LOG_D(MAC, "Cannot find rnti for UE_id %d (num_UEs %d)\n",
	      UE_id, UE_list->num_UEs);
	continue_flag = 1;
      }
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      if (eNB_UE_stats == NULL) {
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          LOG_D(MAC, "[eNB] Cannot find eNB_UE_stats\n");
          continue_flag = 1;
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      }
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      if (!ue_slice_membership(UE_id, slice_idP))
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                  continue;
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      if (continue_flag != 1) {
	switch (get_tmode(module_idP, CC_id, UE_id)) {
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	case 1:
	case 2:
	case 7:
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	  aggregation =
	    get_aggregation(get_bw_index(module_idP, CC_id),
			    ue_sched_ctl->dl_cqi[CC_id],
			    format1);
	  break;
	case 3:
	  aggregation =
	    get_aggregation(get_bw_index(module_idP, CC_id),
			    ue_sched_ctl->dl_cqi[CC_id],
			    format2A);
	  break;
	default:
	  LOG_W(MAC, "Unsupported transmission mode %d\n",
		get_tmode(module_idP, CC_id, UE_id));
	  aggregation = 2;
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	}
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      }
      /* if (continue_flag != 1 */
      if ((ue_sched_ctl->pre_nb_available_rbs[CC_id] == 0) ||	// no RBs allocated 
	  CCE_allocation_infeasible(module_idP, CC_id, 1, subframeP,
				    aggregation, rnti)) {
	LOG_D(MAC,
	      "[eNB %d] Frame %d : no RB allocated for UE %d on CC_id %d: continue \n",
	      module_idP, frameP, UE_id, CC_id);
	continue_flag = 1;	//to next user (there might be rbs availiable for other UEs in TM5
      }
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      if (cc[CC_id].tdd_Config != NULL) {	//TDD
	set_ue_dai(subframeP,
		   UE_id,
		   CC_id,
		   cc[CC_id].tdd_Config->subframeAssignment,
		   UE_list);
	// update UL DAI after DLSCH scheduling
	set_ul_DAI(module_idP, UE_id, CC_id, frameP, subframeP);
      }
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      if (continue_flag == 1) {
	add_ue_dlsch_info(module_idP,
			  CC_id, UE_id, subframeP, S_DL_NONE);
	continue;
      }
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#warning RK->CR This old API call has to be revisited for FAPI, or logic must be changed
#if 0
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      /* add "fake" DCI to have CCE_allocation_infeasible work properly for next allocations */
      /* if we don't add it, next allocations may succeed but overall allocations may fail */
      /* will be removed at the end of this function */
      add_ue_spec_dci(&eNB->common_channels[CC_id].DCI_pdu, &(char[]) {
	  0}, rnti, 1, aggregation, 1, format1, 0);
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#endif
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      nb_available_rb = ue_sched_ctl->pre_nb_available_rbs[CC_id];
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      if (cc->tdd_Config) harq_pid = ((frameP * 10) + subframeP) % 10;
      else            	  harq_pid = ((frameP * 10) + subframeP) & 7;
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      round = ue_sched_ctl->round[CC_id][harq_pid];
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      UE_list->eNB_UE_stats[CC_id][UE_id].crnti      = rnti;
      UE_list->eNB_UE_stats[CC_id][UE_id].rrc_status = mac_eNB_get_rrc_status(module_idP, rnti);
      UE_list->eNB_UE_stats[CC_id][UE_id].harq_pid   = harq_pid;
      UE_list->eNB_UE_stats[CC_id][UE_id].harq_round = round;
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      if (UE_list->eNB_UE_stats[CC_id][UE_id].rrc_status < RRC_CONNECTED) continue;
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      sdu_length_total = 0;
      num_sdus = 0;

      /*
	DevCheck(((eNB_UE_stats->dl_cqi < MIN_CQI_VALUE) || (eNB_UE_stats->dl_cqi > MAX_CQI_VALUE)),
	eNB_UE_stats->dl_cqi, MIN_CQI_VALUE, MAX_CQI_VALUE);
      */
      if (nfapi_mode) {
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		  eNB_UE_stats->dlsch_mcs1 = 10;//cqi_to_mcs[ue_sched_ctl->dl_cqi[CC_id]];
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      }
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      else { // this operation is also done in the preprocessor
		  eNB_UE_stats->dlsch_mcs1 = cmin(eNB_UE_stats->dlsch_mcs1, slice_maxmcs[slice_idP]);  //cmin(eNB_UE_stats->dlsch_mcs1, openair_daq_vars.target_ue_dl_mcs);
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      }
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      // store stats
      //UE_list->eNB_UE_stats[CC_id][UE_id].dl_cqi= eNB_UE_stats->dl_cqi;
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      // initializing the rb allocation indicator for each UE
      for (j = 0; j < N_RBG[CC_id]; j++) {
	UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j] = 0;
      }

      LOG_D(MAC,
	    "[eNB %d] Frame %d: Scheduling UE %d on CC_id %d (rnti %x, harq_pid %d, round %d, rb %d, cqi %d, mcs %d, rrc %d)\n",
	    module_idP, frameP, UE_id, CC_id, rnti, harq_pid, round,
	    nb_available_rb, ue_sched_ctl->dl_cqi[CC_id],
	    eNB_UE_stats->dlsch_mcs1,
	    UE_list->eNB_UE_stats[CC_id][UE_id].rrc_status);



      /* process retransmission  */

      if (round != 8) {
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	// get freq_allocation
	nb_rb = UE_list->UE_template[CC_id][UE_id].nb_rb[harq_pid];
	TBS = get_TBS_DL(UE_list->UE_template[CC_id][UE_id].oldmcs1[harq_pid],
			 nb_rb);

	if (nb_rb <= nb_available_rb) {
	  if (cc[CC_id].tdd_Config != NULL) {
	    UE_list->UE_template[CC_id][UE_id].DAI++;
	    update_ul_dci(module_idP, CC_id, rnti,
			  UE_list->UE_template[CC_id][UE_id].
			  DAI);
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	    LOG_D(MAC,
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		  "DAI update: CC_id %d subframeP %d: UE %d, DAI %d\n",
		  CC_id, subframeP, UE_id,
		  UE_list->UE_template[CC_id][UE_id].DAI);
	  }

	  if (nb_rb == ue_sched_ctl->pre_nb_available_rbs[CC_id]) {
	    for (j = 0; j < N_RBG[CC_id]; j++) {	// for indicating the rballoc for each sub-band
	      UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j] = ue_sched_ctl->rballoc_sub_UE[CC_id][j];
	    }
	  } else {
	    nb_rb_temp = nb_rb;
	    j = 0;

	    while ((nb_rb_temp > 0) && (j < N_RBG[CC_id])) {
	      if (ue_sched_ctl->rballoc_sub_UE[CC_id][j] == 1) {
		if (UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j])
		  printf("WARN: rballoc_subband not free for retrans?\n");
		UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j] = ue_sched_ctl->rballoc_sub_UE[CC_id][j];

		if ((j == N_RBG[CC_id] - 1) &&
		    ((N_RB_DL[CC_id] == 25) ||
		     (N_RB_DL[CC_id] == 50))) {
		  nb_rb_temp = nb_rb_temp - min_rb_unit[CC_id] + 1;
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		} else {
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		  nb_rb_temp = nb_rb_temp - min_rb_unit[CC_id];
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		}
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	      }
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	      j = j + 1;
	    }
	  }
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	  nb_available_rb -= nb_rb;
	  /*
	    eNB->mu_mimo_mode[UE_id].pre_nb_available_rbs = nb_rb;
	    eNB->mu_mimo_mode[UE_id].dl_pow_off = ue_sched_ctl->dl_pow_off[CC_id];
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	    for(j=0; j<N_RBG[CC_id]; j++) {
	    eNB->mu_mimo_mode[UE_id].rballoc_sub[j] = UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j];
	    }
	  */

	  switch (get_tmode(module_idP, CC_id, UE_id)) {
	  case 1:
	  case 2:
	  case 7:
	  default:
	    LOG_D(MAC,"retransmission DL_REQ: rnti:%x\n",rnti);

	    dl_config_pdu = &dl_req->dl_config_pdu_list[dl_req->number_pdu];
	    memset((void *) dl_config_pdu, 0,
		   sizeof(nfapi_dl_config_request_pdu_t));
	    dl_config_pdu->pdu_type = NFAPI_DL_CONFIG_DCI_DL_PDU_TYPE;
	    dl_config_pdu->pdu_size = (uint8_t) (2 + sizeof(nfapi_dl_config_dci_dl_pdu));
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.tl.tag = NFAPI_DL_CONFIG_REQUEST_DCI_DL_PDU_REL8_TAG;
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.dci_format = NFAPI_DL_DCI_FORMAT_1;
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.aggregation_level = get_aggregation(get_bw_index(module_idP, CC_id),
											  ue_sched_ctl->dl_cqi[CC_id],
											  format1);
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti      = rnti;
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti_type = 1;	// CRNTI : see Table 4-10 from SCF082 - nFAPI specifications
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.transmission_power = 6000;	// equal to RS power

	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.harq_process = harq_pid;
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.tpc = 1;	// dont adjust power when retransmitting
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.new_data_indicator_1 = UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.mcs_1 = UE_list->UE_template[CC_id][UE_id].oldmcs1[harq_pid];
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.redundancy_version_1 = round & 3;
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	    if (cc[CC_id].tdd_Config != NULL) {	//TDD
	      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.downlink_assignment_index = (UE_list->UE_template[CC_id][UE_id].DAI - 1) & 3;
	      LOG_D(MAC,
		    "[eNB %d] Retransmission CC_id %d : harq_pid %d, round %d, dai %d, mcs %d\n",
		    module_idP, CC_id, harq_pid, round,
		    (UE_list->UE_template[CC_id][UE_id].DAI - 1),
		    UE_list->UE_template[CC_id][UE_id].oldmcs1[harq_pid]);
	    } else {
	      LOG_D(MAC,
		    "[eNB %d] Retransmission CC_id %d : harq_pid %d, round %d, mcs %d\n",
		    module_idP, CC_id, harq_pid, round,
		    UE_list->UE_template[CC_id][UE_id].oldmcs1[harq_pid]);
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	    }
	    if (!CCE_allocation_infeasible(module_idP, CC_id, 1, subframeP,
					   dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.aggregation_level, rnti)) {
	      dl_req->number_dci++;
	      dl_req->number_pdu++;
	      dl_req->tl.tag = NFAPI_DL_CONFIG_REQUEST_BODY_TAG;
			  
	      eNB->DL_req[CC_id].sfn_sf = frameP<<4 | subframeP;
	      eNB->DL_req[CC_id].header.message_id = NFAPI_DL_CONFIG_REQUEST;

	      fill_nfapi_dlsch_config(eNB, dl_req, TBS, -1
				      /* retransmission, no pdu_index */
				      , rnti, 0,	// type 0 allocation from 7.1.6 in 36.213
				      0,	// virtual_resource_block_assignment_flag, unused here
				      0,	// resource_block_coding, to be filled in later
				      getQm(UE_list->UE_template[CC_id][UE_id].oldmcs1[harq_pid]), round & 3,	// redundancy version
				      1,	// transport blocks
				      0,	// transport block to codeword swap flag
				      cc[CC_id].p_eNB == 1 ? 0 : 1,	// transmission_scheme
				      1,	// number of layers
				      1,	// number of subbands
				      //                      uint8_t codebook_index,
				      4,	// UE category capacity
				      UE_list->UE_template[CC_id][UE_id].physicalConfigDedicated->pdsch_ConfigDedicated->p_a, 0,	// delta_power_offset for TM5
				      0,	// ngap
				      0,	// nprb
				      cc[CC_id].p_eNB == 1 ? 1 : 2,	// transmission mode
				      0,	//number of PRBs treated as one subband, not used here
				      0	// number of beamforming vectors, not used here
				      );

	      LOG_D(MAC,
		    "Filled NFAPI configuration for DCI/DLSCH %d, retransmission round %d\n",
		    eNB->pdu_index[CC_id], round);

	      program_dlsch_acknak(module_idP, CC_id, UE_id,
				   frameP, subframeP,
				   dl_config_pdu->
				   dci_dl_pdu.dci_dl_pdu_rel8.
				   cce_idx);
	      // No TX request for retransmission (check if null request for FAPI)
	    } else {
	      LOG_W(MAC,
		    "Frame %d, Subframe %d: Dropping DLSCH allocation for UE %d\%x, infeasible CCE allocation\n",
		    frameP, subframeP, UE_id, rnti);
	    }
	  }


	  add_ue_dlsch_info(module_idP,
			    CC_id, UE_id, subframeP,
			    S_DL_SCHEDULED);
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	  //eNB_UE_stats->dlsch_trials[round]++;
	  UE_list->eNB_UE_stats[CC_id][UE_id].num_retransmission += 1;
	  UE_list->eNB_UE_stats[CC_id][UE_id].rbs_used_retx = nb_rb;
	  UE_list->eNB_UE_stats[CC_id][UE_id].total_rbs_used_retx += nb_rb;
	  UE_list->eNB_UE_stats[CC_id][UE_id].dlsch_mcs1 = eNB_UE_stats->dlsch_mcs1;
	  UE_list->eNB_UE_stats[CC_id][UE_id].dlsch_mcs2 = eNB_UE_stats->dlsch_mcs1;
	} else {
	  LOG_D(MAC,
		"[eNB %d] Frame %d CC_id %d : don't schedule UE %d, its retransmission takes more resources than we have\n",
		module_idP, frameP, CC_id, UE_id);
	}
      } else {		/* This is a potentially new SDU opportunity */

	rlc_status.bytes_in_buffer = 0;
	// Now check RLC information to compute number of required RBs
	// get maximum TBS size for RLC request
	TBS =
	  get_TBS_DL(eNB_UE_stats->dlsch_mcs1, nb_available_rb);
	// check first for RLC data on DCCH
	// add the length for  all the control elements (timing adv, drx, etc) : header + payload

	if (ue_sched_ctl->ta_timer == 0) {
	  ta_update = ue_sched_ctl->ta_update;
	  /* if we send TA then set timer to not send it for a while */
	  if (ta_update != 31) ue_sched_ctl->ta_timer = 20;
	  /* reset ta_update */
	  ue_sched_ctl->ta_update = 31;
	} else {
	  ta_update = 31;
	}

	ta_len = (ta_update != 31) ? 2 : 0;

	header_len_dcch = 2;	// 2 bytes DCCH SDU subheader
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	if (TBS - ta_len - header_len_dcch > 0) {
	  rlc_status = mac_rlc_status_ind(module_idP, rnti, module_idP, frameP, subframeP, ENB_FLAG_YES, MBMS_FLAG_NO, DCCH, (TBS - ta_len - header_len_dcch));	// transport block set size

	  sdu_lengths[0] = 0;

	  if (rlc_status.bytes_in_buffer > 0) {	// There is DCCH to transmit
	    LOG_D(MAC,
		  "[eNB %d] SFN/SF %d.%d, DL-DCCH->DLSCH CC_id %d, Requesting %d bytes from RLC (RRC message)\n",
		  module_idP, frameP, subframeP, CC_id,
		  TBS - header_len_dcch);
	    sdu_lengths[0] = mac_rlc_data_req(module_idP, rnti, module_idP, frameP, ENB_FLAG_YES, MBMS_FLAG_NO, DCCH, TBS,	//not used
					      (char *)
					      &dlsch_buffer
					      [0]);

	    T(T_ENB_MAC_UE_DL_SDU, T_INT(module_idP),
	      T_INT(CC_id), T_INT(rnti), T_INT(frameP),
	      T_INT(subframeP), T_INT(harq_pid), T_INT(DCCH),
	      T_INT(sdu_lengths[0]));

	    LOG_D(MAC,
		  "[eNB %d][DCCH] CC_id %d Got %d bytes from RLC\n",
		  module_idP, CC_id, sdu_lengths[0]);
	    sdu_length_total = sdu_lengths[0];
	    sdu_lcids[0] = DCCH;
	    UE_list->eNB_UE_stats[CC_id][UE_id].num_pdu_tx[DCCH] += 1;
	    UE_list->eNB_UE_stats[CC_id][UE_id].num_bytes_tx[DCCH] += sdu_lengths[0];
	    num_sdus = 1;
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	    LOG_T(MAC,
		  "[eNB %d][DCCH] CC_id %d Got %d bytes :",
		  module_idP, CC_id, sdu_lengths[0]);
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	    for (j = 0; j < sdu_lengths[0]; j++) {
	      LOG_T(MAC, "%x ", dlsch_buffer[j]);
	    }
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	    LOG_T(MAC, "\n");
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#endif
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	  } else {
	    header_len_dcch = 0;
	    sdu_length_total = 0;
	  }
	}
	// check for DCCH1 and update header information (assume 2 byte sub-header)
	if (TBS - ta_len - header_len_dcch - sdu_length_total > 0) {
	  rlc_status = mac_rlc_status_ind(module_idP, rnti, module_idP, frameP, subframeP, ENB_FLAG_YES, MBMS_FLAG_NO, DCCH + 1, (TBS - ta_len - header_len_dcch - sdu_length_total));	// transport block set size less allocations for timing advance and
	  // DCCH SDU
	  sdu_lengths[num_sdus] = 0;

	  if (rlc_status.bytes_in_buffer > 0) {
	    LOG_D(MAC,
		  "[eNB %d], Frame %d, DCCH1->DLSCH, CC_id %d, Requesting %d bytes from RLC (RRC message)\n",
		  module_idP, frameP, CC_id,
		  TBS - header_len_dcch - sdu_length_total);
	    sdu_lengths[num_sdus] += mac_rlc_data_req(module_idP, rnti, module_idP, frameP, ENB_FLAG_YES, MBMS_FLAG_NO, DCCH + 1, TBS,	//not used
						      (char *)
						      &dlsch_buffer
						      [sdu_length_total]);

	    T(T_ENB_MAC_UE_DL_SDU, T_INT(module_idP),
	      T_INT(CC_id), T_INT(rnti), T_INT(frameP),
	      T_INT(subframeP), T_INT(harq_pid),
	      T_INT(DCCH + 1), T_INT(sdu_lengths[num_sdus]));

	    sdu_lcids[num_sdus] = DCCH1;
	    sdu_length_total += sdu_lengths[num_sdus];
	    header_len_dcch += 2;
	    UE_list->eNB_UE_stats[CC_id][UE_id].
	      num_pdu_tx[DCCH1] += 1;
	    UE_list->eNB_UE_stats[CC_id][UE_id].num_bytes_tx[DCCH1] += sdu_lengths[num_sdus];
	    num_sdus++;
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#ifdef DEBUG_eNB_SCHEDULER
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	    LOG_T(MAC,
		  "[eNB %d][DCCH1] CC_id %d Got %d bytes :",
		  module_idP, CC_id, sdu_lengths[num_sdus]);
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	    for (j = 0; j < sdu_lengths[num_sdus]; j++) {
	      LOG_T(MAC, "%x ", dlsch_buffer[j]);
	    }
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	    LOG_T(MAC, "\n");
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#endif
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	  }
	}
	// assume the max dtch header size, and adjust it later
	header_len_dtch = 0;
	header_len_dtch_last = 0;	// the header length of the last mac sdu
	// lcid has to be sorted before the actual allocation (similar struct as ue_list).
	for (lcid = NB_RB_MAX - 1; lcid >= DTCH; lcid--) {
	  // TBD: check if the lcid is active

	  header_len_dtch += 3;
	  header_len_dtch_last = 3;
	  LOG_D(MAC,
		"[eNB %d], Frame %d, DTCH%d->DLSCH, Checking RLC status (tbs %d, len %d)\n",
		module_idP, frameP, lcid, TBS,
		TBS - ta_len - header_len_dcch -
		sdu_length_total - header_len_dtch);

	  if (TBS - ta_len - header_len_dcch - sdu_length_total - header_len_dtch > 0) {	// NN: > 2 ? 
	    rlc_status = mac_rlc_status_ind(module_idP,
					    rnti,
					    module_idP,
					    frameP,
					    subframeP,
					    ENB_FLAG_YES,
					    MBMS_FLAG_NO,
					    lcid,
					    TBS - ta_len -
					    header_len_dcch -
					    sdu_length_total -
					    header_len_dtch);


	    if (rlc_status.bytes_in_buffer > 0) {

	      LOG_D(MAC,
		    "[eNB %d][USER-PLANE DEFAULT DRB] Frame %d : DTCH->DLSCH, Requesting %d bytes from RLC (lcid %d total hdr len %d)\n",
		    module_idP, frameP,
		    TBS - header_len_dcch -
		    sdu_length_total - header_len_dtch, lcid,
		    header_len_dtch);
	      sdu_lengths[num_sdus] = mac_rlc_data_req(module_idP, rnti, module_idP, frameP, ENB_FLAG_YES, MBMS_FLAG_NO, lcid, TBS,	//not used
						       (char
							*)
						       &dlsch_buffer
						       [sdu_length_total]);
	      T(T_ENB_MAC_UE_DL_SDU, T_INT(module_idP),
		T_INT(CC_id), T_INT(rnti), T_INT(frameP),
		T_INT(subframeP), T_INT(harq_pid),
		T_INT(lcid), T_INT(sdu_lengths[num_sdus]));

	      LOG_D(MAC,
		    "[eNB %d][USER-PLANE DEFAULT DRB] Got %d bytes for DTCH %d \n",
		    module_idP, sdu_lengths[num_sdus], lcid);
	      sdu_lcids[num_sdus] = lcid;
	      sdu_length_total += sdu_lengths[num_sdus];
	      UE_list->
		eNB_UE_stats[CC_id][UE_id].num_pdu_tx[lcid]
		+= 1;
	      UE_list->
		eNB_UE_stats[CC_id][UE_id].num_bytes_tx
		[lcid] += sdu_lengths[num_sdus];
	      if (sdu_lengths[num_sdus] < 128) {
		header_len_dtch--;
		header_len_dtch_last--;
	      }
	      num_sdus++;
	      UE_list->UE_sched_ctrl[UE_id].uplane_inactivity_timer = 0;
	    }	// no data for this LCID
	    else {
	      header_len_dtch -= 3;
	    }
	  }		// no TBS left
	  else {
	    header_len_dtch -= 3;
	    break;
	  }
	}
	if (header_len_dtch == 0)
	  header_len_dtch_last = 0;
	// there is at least one SDU 
	// if (num_sdus > 0 ){
	if ((sdu_length_total + header_len_dcch +
	     header_len_dtch) > 0) {

	  // Now compute number of required RBs for total sdu length
	  // Assume RAH format 2
	  // adjust  header lengths
	  header_len_dcch_tmp = header_len_dcch;
	  header_len_dtch_tmp = header_len_dtch;
	  if (header_len_dtch == 0) {
	    header_len_dcch = (header_len_dcch > 0) ? 1 : 0;	//header_len_dcch;  // remove length field
	  } else {
	    header_len_dtch_last -= 1;	// now use it to find how many bytes has to be removed for the last MAC SDU 
	    header_len_dtch = (header_len_dtch > 0) ? header_len_dtch - header_len_dtch_last : header_len_dtch;	// remove length field for the last SDU
	  }

	  mcs = eNB_UE_stats->dlsch_mcs1;

	  if (mcs == 0) {
	    nb_rb = 4;	// don't let the TBS get too small
	  } else {
	    nb_rb = min_rb_unit[CC_id];
	  }

	  TBS = get_TBS_DL(mcs, nb_rb);

	  while (TBS <
		 (sdu_length_total + header_len_dcch +
		  header_len_dtch + ta_len)) {
	    nb_rb += min_rb_unit[CC_id];	//

	    if (nb_rb > nb_available_rb) {	// if we've gone beyond the maximum number of RBs
	      // (can happen if N_RB_DL is odd)
	      TBS =
		get_TBS_DL(eNB_UE_stats->dlsch_mcs1,
			   nb_available_rb);
	      nb_rb = nb_available_rb;
	      break;
	    }

	    TBS = get_TBS_DL(eNB_UE_stats->dlsch_mcs1, nb_rb);
	  }

	  if (nb_rb == ue_sched_ctl->pre_nb_available_rbs[CC_id]) {
	    for (j = 0; j < N_RBG[CC_id]; j++) {	// for indicating the rballoc for each sub-band
	      UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j] =	ue_sched_ctl->rballoc_sub_UE[CC_id][j];
	    }
	  } else {
	    nb_rb_temp = nb_rb;
	    j = 0;

	    while ((nb_rb_temp > 0) && (j < N_RBG[CC_id])) {
	      if (ue_sched_ctl->rballoc_sub_UE[CC_id][j] == 1) {
		UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j] = ue_sched_ctl->rballoc_sub_UE[CC_id][j];

		if ((j == N_RBG[CC_id] - 1) &&
		    ((N_RB_DL[CC_id] == 25) ||
		     (N_RB_DL[CC_id] == 50))) {
		  nb_rb_temp = nb_rb_temp - min_rb_unit[CC_id] + 1;
		} else {
		  nb_rb_temp = nb_rb_temp - min_rb_unit[CC_id];
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		}
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	      }

	      j = j + 1;
	    }
	  }

	  // decrease mcs until TBS falls below required length
	  while ((TBS > (sdu_length_total + header_len_dcch + header_len_dtch + ta_len)) && (mcs > 0)) {
	    mcs--;
	    TBS = get_TBS_DL(mcs, nb_rb);
	  }

	  // if we have decreased too much or we don't have enough RBs, increase MCS
	  while ((TBS < (sdu_length_total + header_len_dcch + header_len_dtch + ta_len))
		 && (((ue_sched_ctl->dl_pow_off[CC_id] > 0)
		      && (mcs < 28))
		     || ((ue_sched_ctl->dl_pow_off[CC_id] == 0)
			 && (mcs <= 15)))) {
	    mcs++;
	    TBS = get_TBS_DL(mcs, nb_rb);
	  }

	  LOG_D(MAC,
		"dlsch_mcs before and after the rate matching = (%d, %d)\n",
		eNB_UE_stats->dlsch_mcs1, mcs);
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	  LOG_D(MAC,
		"[eNB %d] CC_id %d Generated DLSCH header (mcs %d, TBS %d, nb_rb %d)\n",
		module_idP, CC_id, mcs, TBS, nb_rb);
	  // msg("[MAC][eNB ] Reminder of DLSCH with random data %d %d %d %d \n",
	  //  TBS, sdu_length_total, offset, TBS-sdu_length_total-offset);
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#endif
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	  if ((TBS - header_len_dcch - header_len_dtch - sdu_length_total - ta_len) <= 2) {
	    padding = (TBS - header_len_dcch - header_len_dtch - sdu_length_total - ta_len);
	    post_padding = 0;
	  } else {
	    padding = 0;

	    // adjust the header len
	    if (header_len_dtch == 0) {
	      header_len_dcch = header_len_dcch_tmp;
	    } else {	//if (( header_len_dcch==0)&&((header_len_dtch==1)||(header_len_dtch==2)))
	      header_len_dtch = header_len_dtch_tmp;
	    }

	    post_padding = TBS - sdu_length_total - header_len_dcch - header_len_dtch - ta_len;	// 1 is for the postpadding header
	  }


	  offset = generate_dlsch_header((unsigned char *) UE_list->DLSCH_pdu[CC_id][0][UE_id].payload[0], num_sdus,	//num_sdus
					 sdu_lengths,	//
					 sdu_lcids, 255,	// no drx
					 ta_update,	// timing advance
					 NULL,	// contention res id
					 padding, post_padding);

	  //#ifdef DEBUG_eNB_SCHEDULER
	  if (ta_update != 31) {
	    LOG_D(MAC,
		  "[eNB %d][DLSCH] Frame %d Generate header for UE_id %d on CC_id %d: sdu_length_total %d, num_sdus %d, sdu_lengths[0] %d, sdu_lcids[0] %d => payload offset %d,timing advance value : %d, padding %d,post_padding %d,(mcs %d, TBS %d, nb_rb %d),header_dcch %d, header_dtch %d\n",
		  module_idP, frameP, UE_id, CC_id,
		  sdu_length_total, num_sdus, sdu_lengths[0],
		  sdu_lcids[0], offset, ta_update, padding,
		  post_padding, mcs, TBS, nb_rb,
		  header_len_dcch, header_len_dtch);
	  }
	  //#endif
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#ifdef DEBUG_eNB_SCHEDULER
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	  LOG_T(MAC, "[eNB %d] First 16 bytes of DLSCH : \n");
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	  for (i = 0; i < 16; i++) {
	    LOG_T(MAC, "%x.", dlsch_buffer[i]);
	  }
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	  LOG_T(MAC, "\n");
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#endif
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	  // cycle through SDUs and place in dlsch_buffer
	  memcpy(&UE_list->DLSCH_pdu[CC_id][0][UE_id].payload[0][offset],
		 dlsch_buffer, sdu_length_total);
	  // memcpy(RC.mac[0].DLSCH_pdu[0][0].payload[0][offset],dcch_buffer,sdu_lengths[0]);

	  // fill remainder of DLSCH with random data
	  for (j = 0; j < (TBS - sdu_length_total - offset); j++) {
	    UE_list->DLSCH_pdu[CC_id][0][UE_id].payload[0][offset + sdu_length_total + j] = (char) (taus() & 0xff);
	  }


	  if (opt_enabled == 1) {
	    trace_pdu(1, (uint8_t *)
		      UE_list->DLSCH_pdu[CC_id][0][UE_id].
		      payload[0], TBS, module_idP, 3,
		      UE_RNTI(module_idP, UE_id), eNB->frame,
		      eNB->subframe, 0, 0);
	    LOG_D(OPT,
		  "[eNB %d][DLSCH] CC_id %d Frame %d  rnti %x  with size %d\n",
		  module_idP, CC_id, frameP,
		  UE_RNTI(module_idP, UE_id), TBS);
	  }

	  T(T_ENB_MAC_UE_DL_PDU_WITH_DATA, T_INT(module_idP),
	    T_INT(CC_id), T_INT(rnti), T_INT(frameP),
	    T_INT(subframeP), T_INT(harq_pid),
	    T_BUFFER(UE_list->DLSCH_pdu[CC_id][0][UE_id].
		     payload[0], TBS));

	  UE_list->UE_template[CC_id][UE_id].nb_rb[harq_pid] = nb_rb;

	  add_ue_dlsch_info(module_idP,
			    CC_id, UE_id, subframeP,
			    S_DL_SCHEDULED);
	  // store stats
	  eNB->eNB_stats[CC_id].dlsch_bytes_tx += sdu_length_total;
	  eNB->eNB_stats[CC_id].dlsch_pdus_tx += 1;

	  UE_list->eNB_UE_stats[CC_id][UE_id].rbs_used = nb_rb;
	  UE_list->eNB_UE_stats[CC_id][UE_id].total_rbs_used += nb_rb;
	  UE_list->eNB_UE_stats[CC_id][UE_id].dlsch_mcs1 = eNB_UE_stats->dlsch_mcs1;
	  UE_list->eNB_UE_stats[CC_id][UE_id].dlsch_mcs2 = mcs;
	  UE_list->eNB_UE_stats[CC_id][UE_id].TBS = TBS;

	  UE_list->eNB_UE_stats[CC_id][UE_id].overhead_bytes = TBS - sdu_length_total;
	  UE_list->eNB_UE_stats[CC_id][UE_id].total_sdu_bytes += sdu_length_total;
	  UE_list->eNB_UE_stats[CC_id][UE_id].total_pdu_bytes += TBS;
	  UE_list->eNB_UE_stats[CC_id][UE_id].total_num_pdus += 1;

	  if (cc[CC_id].tdd_Config != NULL) {	// TDD
	    UE_list->UE_template[CC_id][UE_id].DAI++;
	    update_ul_dci(module_idP, CC_id, rnti,
			  UE_list->UE_template[CC_id][UE_id].
			  DAI);
	  }
	  // do PUCCH power control
	  // this is the normalized RX power
	  eNB_UE_stats = &UE_list->eNB_UE_stats[CC_id][UE_id];

	  /* TODO: fix how we deal with power, unit is not dBm, it's special from nfapi */
	  normalized_rx_power = ue_sched_ctl->pucch1_snr[CC_id];
	  target_rx_power = 208;

	  // this assumes accumulated tpc
	  // make sure that we are only sending a tpc update once a frame, otherwise the control loop will freak out
	  int32_t framex10psubframe = UE_list->UE_template[CC_id][UE_id].pucch_tpc_tx_frame * 10 + UE_list->UE_template[CC_id][UE_id].pucch_tpc_tx_subframe;
	  if (((framex10psubframe + 10) <= (frameP * 10 + subframeP)) ||	//normal case
	      ((framex10psubframe > (frameP * 10 + subframeP)) && (((10240 - framex10psubframe + frameP * 10 + subframeP) >= 10))))	//frame wrap-around
	    if (ue_sched_ctl->pucch1_cqi_update[CC_id] == 1) {
	      ue_sched_ctl->pucch1_cqi_update[CC_id] = 0;

	      UE_list->UE_template[CC_id][UE_id].pucch_tpc_tx_frame = frameP;
	      UE_list->UE_template[CC_id][UE_id].pucch_tpc_tx_subframe = subframeP;

	      if (normalized_rx_power > (target_rx_power + 4)) {
		tpc = 0;	//-1
		tpc_accumulated--;
	      } else if (normalized_rx_power < (target_rx_power - 4)) {
		tpc = 2;	//+1
		tpc_accumulated++;
	      } else {
		tpc = 1;	//0
	      }

	      LOG_D(MAC,
		    "[eNB %d] DLSCH scheduler: frame %d, subframe %d, harq_pid %d, tpc %d, accumulated %d, normalized/target rx power %d/%d\n",
		    module_idP, frameP, subframeP, harq_pid,
		    tpc, tpc_accumulated,
		    normalized_rx_power, target_rx_power);

	    }	// Po_PUCCH has been updated 
	    else {
	      tpc = 1;	//0
	    }	// time to do TPC update 
	  else {
	    tpc = 1;	//0
	  }

	  dl_config_pdu = &dl_req->dl_config_pdu_list[dl_req->number_pdu];
	  memset((void *) dl_config_pdu, 0,
		 sizeof(nfapi_dl_config_request_pdu_t));
	  dl_config_pdu->pdu_type = NFAPI_DL_CONFIG_DCI_DL_PDU_TYPE;
	  dl_config_pdu->pdu_size = (uint8_t) (2 + sizeof(nfapi_dl_config_dci_dl_pdu));
	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.dci_format = NFAPI_DL_DCI_FORMAT_1;
	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.aggregation_level = get_aggregation(get_bw_index(module_idP, CC_id),
											ue_sched_ctl->dl_cqi[CC_id],
											format1);
	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.tl.tag = NFAPI_DL_CONFIG_REQUEST_DCI_DL_PDU_REL8_TAG;
	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti = rnti;
	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti_type = 1;	// CRNTI : see Table 4-10 from SCF082 - nFAPI specifications
	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.transmission_power = 6000;	// equal to RS power

	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.harq_process = harq_pid;
	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.tpc = tpc;	// dont adjust power when retransmitting
	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.new_data_indicator_1 = 1 - UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.mcs_1 = mcs;
	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.redundancy_version_1 = 0;
	  //deactivate second codeword
	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.mcs_2 = 0;
	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.redundancy_version_2 = 1;
	  if (cc[CC_id].tdd_Config != NULL) {	//TDD
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.downlink_assignment_index = (UE_list->UE_template[CC_id][UE_id].DAI - 1) & 3;
	    LOG_D(MAC,
		  "[eNB %d] Initial transmission CC_id %d : harq_pid %d, dai %d, mcs %d\n",
		  module_idP, CC_id, harq_pid,
		  (UE_list->UE_template[CC_id][UE_id].DAI - 1),
		  mcs);
	  } else {
	    LOG_D(MAC,
		  "[eNB %d] Initial transmission CC_id %d : harq_pid %d, mcs %d\n",
		  module_idP, CC_id, harq_pid, mcs);
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	  }
	  LOG_D(MAC, "Checking feasibility pdu %d (new sdu)\n",
		dl_req->number_pdu);
	  if (!CCE_allocation_infeasible(module_idP, CC_id, 1, subframeP,
					 dl_config_pdu->dci_dl_pdu.
					 dci_dl_pdu_rel8.aggregation_level, rnti)) {
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	    ue_sched_ctl->round[CC_id][harq_pid] = 0;
	    dl_req->number_dci++;
	    dl_req->number_pdu++;
	    dl_req->tl.tag = NFAPI_DL_CONFIG_REQUEST_BODY_TAG;
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	    eNB->DL_req[CC_id].sfn_sf = frameP<<4 | subframeP;
	    eNB->DL_req[CC_id].header.message_id = NFAPI_DL_CONFIG_REQUEST;
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	    // Toggle NDI for next time
	    LOG_D(MAC,
		  "CC_id %d Frame %d, subframeP %d: Toggling Format1 NDI for UE %d (rnti %x/%d) oldNDI %d\n",
		  CC_id, frameP, subframeP, UE_id, rnti,
		  harq_pid,
		  UE_list->
		  UE_template[CC_id][UE_id].oldNDI[harq_pid]);

	    UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid] = 1 - UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
	    UE_list->UE_template[CC_id][UE_id].oldmcs1[harq_pid] = mcs;
	    UE_list->UE_template[CC_id][UE_id].oldmcs2[harq_pid] = 0;
	    AssertFatal(UE_list->UE_template[CC_id][UE_id].physicalConfigDedicated !=
			NULL,
			"physicalConfigDedicated is NULL\n");
	    AssertFatal(UE_list->UE_template[CC_id][UE_id].physicalConfigDedicated->pdsch_ConfigDedicated != NULL,
			"physicalConfigDedicated->pdsch_ConfigDedicated is NULL\n");

	    fill_nfapi_dlsch_config(eNB, dl_req, TBS, eNB->pdu_index[CC_id], rnti, 0,	// type 0 allocation from 7.1.6 in 36.213
				    0,	// virtual_resource_block_assignment_flag, unused here
				    0,	// resource_block_coding, to be filled in later
				    getQm(mcs), 0,	// redundancy version
				    1,	// transport blocks
				    0,	// transport block to codeword swap flag
				    cc[CC_id].p_eNB == 1 ? 0 : 1,	// transmission_scheme
				    1,	// number of layers
				    1,	// number of subbands
				    //                       uint8_t codebook_index,
				    4,	// UE category capacity
				    UE_list->UE_template[CC_id][UE_id].physicalConfigDedicated->pdsch_ConfigDedicated->p_a, 0,	// delta_power_offset for TM5
				    0,	// ngap
				    0,	// nprb
				    cc[CC_id].p_eNB == 1 ? 1 : 2,	// transmission mode
				    0,	//number of PRBs treated as one subband, not used here
				    0	// number of beamforming vectors, not used here
				    );
	    eNB->TX_req[CC_id].sfn_sf = fill_nfapi_tx_req(&eNB->
							  TX_req
							  [CC_id].tx_request_body,
							  (frameP * 10) + subframeP,
							  TBS, eNB->pdu_index[CC_id],
							  eNB->
							  UE_list.DLSCH_pdu[CC_id][0][(unsigned char)
										      UE_id].payload
							  [0]);
	    
	    LOG_D(MAC,
		  "Filled NFAPI configuration for DCI/DLSCH/TXREQ %d, new SDU\n",
		  eNB->pdu_index[CC_id]);

	    eNB->pdu_index[CC_id]++;
	    program_dlsch_acknak(module_idP, CC_id, UE_id,
				 frameP, subframeP,
				 dl_config_pdu->
				 dci_dl_pdu.dci_dl_pdu_rel8.
				 cce_idx);

	  } else {
	    LOG_W(MAC,
		  "Frame %d, Subframe %d: Dropping DLSCH allocation for UE %d/%x, infeasible CCE allocations\n",
		  frameP, subframeP, UE_id, rnti);
	  }
	} else {	// There is no data from RLC or MAC header, so don't schedule
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	}
      }
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      if (cc[CC_id].tdd_Config != NULL) {	// TDD
	set_ul_DAI(module_idP, UE_id, CC_id, frameP, subframeP);
      }
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    }			// UE_id loop
  }				// CC_id loop
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  fill_DLSCH_dci(module_idP, frameP, subframeP, mbsfn_flag);

  stop_meas(&eNB->schedule_dlsch);
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_SCHEDULE_DLSCH, VCD_FUNCTION_OUT);
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}

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//------------------------------------------------------------------------------
void
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fill_DLSCH_dci(module_id_t module_idP,
	       frame_t frameP, sub_frame_t subframeP, int *mbsfn_flagP)
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//------------------------------------------------------------------------------
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{
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  // loop over all allocated UEs and compute frequency allocations for PDSCH
  int UE_id = -1;
  uint8_t /* first_rb, */ nb_rb = 3;
  rnti_t rnti;
  //unsigned char *vrb_map;
  uint8_t rballoc_sub[25];
  //uint8_t number_of_subbands=13;

  //unsigned char round;
  unsigned char harq_pid;
  int i;
  int CC_id;
  eNB_MAC_INST *eNB = RC.mac[module_idP];
  UE_list_t *UE_list = &eNB->UE_list;
  int N_RBG;
  int N_RB_DL;
  COMMON_channels_t *cc;

  start_meas(&eNB->fill_DLSCH_dci);
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
    (VCD_SIGNAL_DUMPER_FUNCTIONS_FILL_DLSCH_DCI, VCD_FUNCTION_IN);

  for (CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
    LOG_D(MAC, "Doing fill DCI for CC_id %d\n", CC_id);

    if (mbsfn_flagP[CC_id] > 0)
      continue;

    cc = &eNB->common_channels[CC_id];
    N_RBG = to_rbg(cc->mib->message.dl_Bandwidth);
    N_RB_DL = to_prb(cc->mib->message.dl_Bandwidth);

    // UE specific DCIs
    for (UE_id = UE_list->head; UE_id >= 0;
	 UE_id = UE_list->next[UE_id]) {
      LOG_T(MAC, "CC_id %d, UE_id: %d => status %d\n", CC_id, UE_id,
	    eNB_dlsch_info[module_idP][CC_id][UE_id].status);

      if (eNB_dlsch_info[module_idP][CC_id][UE_id].status == S_DL_SCHEDULED) {

	// clear scheduling flag
	eNB_dlsch_info[module_idP][CC_id][UE_id].status = S_DL_WAITING;
	rnti = UE_RNTI(module_idP, UE_id);
	if (cc->tdd_Config) harq_pid = ((frameP * 10) + subframeP) % 10;
	else          	    harq_pid = ((frameP * 10) + subframeP) & 7;
	nb_rb = UE_list->UE_template[CC_id][UE_id].nb_rb[harq_pid];

	/// Synchronizing rballoc with rballoc_sub
	for (i = 0; i < N_RBG; i++) {
	  rballoc_sub[i] = UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][i];
	}
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	nfapi_dl_config_request_t *DL_req = &RC.mac[module_idP]->DL_req[0];
	nfapi_dl_config_request_pdu_t *dl_config_pdu;

	for (i = 0;
	     i < DL_req[CC_id].dl_config_request_body.number_pdu;
	     i++) {
	  dl_config_pdu = &DL_req[CC_id].dl_config_request_body.dl_config_pdu_list[i];
	  if ((dl_config_pdu->pdu_type == NFAPI_DL_CONFIG_DCI_DL_PDU_TYPE)
	      && (dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti == rnti)
	      && (dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.dci_format != 1)) {
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.resource_block_coding = allocate_prbs_sub(nb_rb, N_RB_DL, N_RBG,rballoc_sub);
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.resource_allocation_type = 0;
	  } else
	    if ((dl_config_pdu->pdu_type == NFAPI_DL_CONFIG_DLSCH_PDU_TYPE)
		&& (dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.rnti == rnti)
		&& (dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_allocation_type == 0)) {
	      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_block_coding =allocate_prbs_sub(nb_rb, N_RB_DL, N_RBG,rballoc_sub);
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	    }
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	}
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      }
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    }
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  }

  stop_meas(&eNB->fill_DLSCH_dci);
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_FILL_DLSCH_DCI, VCD_FUNCTION_OUT);
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}

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//------------------------------------------------------------------------------
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unsigned char *get_dlsch_sdu(module_id_t module_idP,
			     int CC_id, frame_t frameP, rnti_t rntiP,
			     uint8_t TBindex)
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//------------------------------------------------------------------------------
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{
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  int UE_id;
  eNB_MAC_INST *eNB = RC.mac[module_idP];
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  if (rntiP == SI_RNTI) {
    LOG_D(MAC, "[eNB %d] CC_id %d Frame %d Get DLSCH sdu for BCCH \n",
	  module_idP, CC_id, frameP);
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    return ((unsigned char *) &eNB->common_channels[CC_id].BCCH_pdu.payload[0]);
  }
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  if (rntiP==P_RNTI) {
    LOG_D(MAC,"[eNB %d] CC_id %d Frame %d Get PCH sdu for PCCH \n", module_idP, CC_id, frameP);
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    return((unsigned char *)&eNB->common_channels[CC_id].PCCH_pdu.payload[0]);
  }
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  UE_id = find_UE_id(module_idP,rntiP);
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  if (UE_id != -1) {
    LOG_D(MAC,
	  "[eNB %d] Frame %d:  CC_id %d Get DLSCH sdu for rnti %x => UE_id %d\n",
	  module_idP, frameP, CC_id, rntiP, UE_id);
    return ((unsigned char *) &eNB->UE_list.DLSCH_pdu[CC_id][TBindex][UE_id].payload[0]);
  } else {
    LOG_E(MAC,
	  "[eNB %d] Frame %d: CC_id %d UE with RNTI %x does not exist\n",
	  module_idP, frameP, CC_id, rntiP);
    return NULL;
  }
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}
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//------------------------------------------------------------------------------
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void
update_ul_dci(module_id_t module_idP,
	      uint8_t CC_idP, rnti_t rntiP, uint8_t daiP)
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//------------------------------------------------------------------------------
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{
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  nfapi_hi_dci0_request_t *HI_DCI0_req =
    &RC.mac[module_idP]->HI_DCI0_req[CC_idP];
  nfapi_hi_dci0_request_pdu_t *hi_dci0_pdu =
    &HI_DCI0_req->hi_dci0_request_body.hi_dci0_pdu_list[0];
  COMMON_channels_t *cc = &RC.mac[module_idP]->common_channels[CC_idP];
  int i;
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  if (cc->tdd_Config != NULL) {	// TDD 
    for (i = 0;
	 i <HI_DCI0_req->hi_dci0_request_body.number_of_dci + HI_DCI0_req->hi_dci0_request_body.number_of_dci; 
	 i++) {
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      if ((hi_dci0_pdu[i].pdu_type == NFAPI_HI_DCI0_DCI_PDU_TYPE) &&
	  (hi_dci0_pdu[i].dci_pdu.dci_pdu_rel8.rnti == rntiP))
	hi_dci0_pdu[i].dci_pdu.dci_pdu_rel8.dl_assignment_index = (daiP - 1) & 3;
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    }
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  }
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}


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//------------------------------------------------------------------------------
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void
set_ue_dai(sub_frame_t subframeP,
	   int UE_id, uint8_t CC_id, uint8_t tdd_config,
	   UE_list_t * UE_list)
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//------------------------------------------------------------------------------
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{
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  switch (tdd_config) {
  case 0:
    if ((subframeP == 0) || (subframeP == 1) || (subframeP == 3)
	|| (subframeP == 5) || (subframeP == 6) || (subframeP == 8)) {
      UE_list->UE_template[CC_id][UE_id].DAI = 0;
    }
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    break;
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  case 1:
    if ((subframeP == 0) || (subframeP == 4) || (subframeP == 5)
	|| (subframeP == 9)) {
      UE_list->UE_template[CC_id][UE_id].DAI = 0;
    }
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    break;
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  case 2:
    if ((subframeP == 4) || (subframeP == 5)) {
      UE_list->UE_template[CC_id][UE_id].DAI = 0;
    }
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    break;
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  case 3:
    if ((subframeP == 5) || (subframeP == 7) || (subframeP == 9)) {
      UE_list->UE_template[CC_id][UE_id].DAI = 0;
    }
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    break;
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  case 4:
    if ((subframeP == 0) || (subframeP == 6)) {
      UE_list->UE_template[CC_id][UE_id].DAI = 0;
    }
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    break;
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  case 5:
    if (subframeP == 9) {
      UE_list->UE_template[CC_id][UE_id].DAI = 0;
    }
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    break;
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  case 6:
    if ((subframeP == 0) || (subframeP == 1) || (subframeP == 5)
	|| (subframeP == 6) || (subframeP == 9)) {
      UE_list->UE_template[CC_id][UE_id].DAI = 0;
    }
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    break;
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  default:
    UE_list->UE_template[CC_id][UE_id].DAI = 0;
    LOG_N(MAC, "unknow TDD config %d\n", tdd_config);
    break;
  }
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}
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void schedule_PCH(module_id_t module_idP,frame_t frameP,sub_frame_t subframeP)
{
  /* DCI:format 1A/1C P-RNTI:0xFFFE */
  /* PDU:eNB_rrc_inst[Mod_idP].common_channels[CC_id].PCCH_pdu.payload */
  uint16_t                       pcch_sdu_length;
  int                            mcs = -1;
  int                            CC_id;
  eNB_MAC_INST                   *eNB      = RC.mac[module_idP];
  COMMON_channels_t              *cc;
  uint8_t                        *vrb_map;
  int                            n_rb_dl;
  int                            first_rb = -1;
  nfapi_dl_config_request_pdu_t  *dl_config_pdu;
  nfapi_tx_request_pdu_t         *TX_req;
  nfapi_dl_config_request_body_t *dl_req;
#ifdef FORMAT1C
  int                            gap_index = 0;      /* indicate which gap(1st or 2nd) is used (0:1st) */
  const int                      GAP_MAP [9][2] = {
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    {-1, 0},        /* N_RB_DL [6-10] -1: |N_RB/2| 0: N/A*/
    {4, 0},         /* N_RB_DL [11] */
    {8, 0},         /* N_RB_DL [12-19] */
    {12, 0},        /* N_RB_DL [20-26] */
    {18, 0},        /* N_RB_DL [27-44] */
    {27, 0},        /* N_RB_DL [45-49] */
    {27, 9},        /* N_RB_DL [50-63] */
    {32, 16},       /* N_RB_DL [64-79] */
    {48, 16}        /* N_RB_DL [80-110] */
  };
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  uint8_t                        n_rb_step = 0;
  uint8_t                        n_gap = 0;
  uint8_t                        n_vrb_dl = 0;
  uint8_t                        Lcrbs = 0;
  uint16_t                       rb_bit    = 168;    /* RB bit number value is unsure */
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#endif
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  start_meas(&eNB->schedule_pch);

  for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
    cc              = &eNB->common_channels[CC_id];
    vrb_map         = (void*)&cc->vrb_map;
    n_rb_dl         = to_prb(cc->mib->message.dl_Bandwidth);
    dl_req          = &eNB->DL_req[CC_id].dl_config_request_body;
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    for (uint16_t i = 0; i < NUMBER_OF_UE_MAX; i++) {
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      if (UE_PF_PO[CC_id][i].enable_flag != TRUE) {
        continue;
      }
      if (frameP % UE_PF_PO[CC_id][i].T == UE_PF_PO[CC_id][i].PF_min && subframeP == UE_PF_PO[CC_id][i].PO) {
1819
	pcch_sdu_length = mac_rrc_data_req(module_idP,
1820 1821 1822 1823 1824
                                           CC_id,
                                           frameP,
                                           PCCH,1,
                                           &cc->PCCH_pdu.payload[0],
                                           i); // used for ue index
1825 1826 1827 1828 1829
	if (pcch_sdu_length == 0) {
	  LOG_D(MAC,"[eNB %d] Frame %d subframe %d: PCCH not active(size = 0 byte)\n", module_idP,frameP, subframeP);
	  continue;
	}
	LOG_D(MAC,"[eNB %d] Frame %d subframe %d: PCCH->PCH CC_id %d UE_id %d, Received %d bytes \n", module_idP, frameP, subframeP, CC_id,i, pcch_sdu_length);
1830
#ifdef FORMAT1C
1831 1832 1833 1834
	//NO SIB
	if ((subframeP == 1 || subframeP == 2 || subframeP == 4 || subframeP == 6 || subframeP == 9) ||
	    (subframeP == 5 && ((frameP % 2) != 0 && (frameP % 8) != 1))) {
	  switch (n_rb_dl) {
1835
#if 0
1836 1837 1838 1839 1840 1841 1842 1843 1844 1845
	  case 6:
	    n_gap = n_rb_dl/2;  /* expect: 3 */
	    n_vrb_dl = 2*((n_gap < (n_rb_dl - n_gap)) ? n_gap : (n_rb_dl - n_gap));;  /* expect: 6 */
	    first_rb = 0;
	    break;
	  case 15:
	    n_gap = GAP_MAP[2][0];  /* expect: 8 */
	    n_vrb_dl = 2*((n_gap < (n_rb_dl - n_gap)) ? n_gap : (n_rb_dl - n_gap));  /* expect: 14 */
	    first_rb = 6;
	    break;
1846
#endif
1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872
	  case 25:
	    n_gap = GAP_MAP[3][0];  /* expect: 12 */
	    n_vrb_dl = 2*((n_gap < (n_rb_dl - n_gap)) ? n_gap : (n_rb_dl - n_gap));  /* expect: 24 */
	    first_rb = 10;
	    break;
	  case 50:
	    n_gap = GAP_MAP[6][gap_index];  /* expect: 27 or 9 */
	    if (gap_index > 0) {
	      n_vrb_dl = (n_rb_dl / (2*n_gap)) * (2*n_gap);  /* 36 */
	    } else {
	      n_vrb_dl = 2*((n_gap < (n_rb_dl - n_gap)) ? n_gap : (n_rb_dl - n_gap));  /* expect: 46 */
	    }
	    first_rb = 24;
	    break;
	  case 100:
	    n_gap = GAP_MAP[8][gap_index];  /* expect: 48 or 16 */
	    if (gap_index > 0) {
	      n_vrb_dl = (n_rb_dl / (2*n_gap)) * (2*n_gap);  /* expect: 96 */
	    } else {
	      n_vrb_dl = 2*((n_gap < (n_rb_dl - n_gap)) ? n_gap : (n_rb_dl - n_gap));  /* expect: 96 */
	    }
	    first_rb = 48;
	    break;
	  }
	} else if (subframeP == 5 && ((frameP % 2) == 0 || (frameP % 8) == 1)) {  // SIB + paging
	  switch (n_rb_dl) {
1873
#if 0
1874 1875 1876 1877 1878 1879 1880 1881 1882 1883
	  case 6:
	    n_gap = n_rb_dl/2;  /* expect: 3 */
	    n_vrb_dl = 2*((n_gap < (n_rb_dl - n_gap)) ? n_gap : (n_rb_dl - n_gap));;  /* expect: 6 */
	    first_rb = 0;
	    break;
	  case 15:
	    n_gap = GAP_MAP[2][0];  /* expect: 8 */
	    n_vrb_dl = 2*((n_gap < (n_rb_dl - n_gap)) ? n_gap : (n_rb_dl - n_gap));  /* expect: 14 */
	    first_rb = 10;
	    break;
1884
#endif
1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948
	  case 25:
	    n_gap = GAP_MAP[3][0];  /* expect: 12 */
	    n_vrb_dl = 2*((n_gap < (n_rb_dl - n_gap)) ? n_gap : (n_rb_dl - n_gap));  /* expect: 24 */
	    first_rb = 14;
	    break;
	  case 50:
	    n_gap = GAP_MAP[6][gap_index];  /* expect: 27 or 9 */
	    if (gap_index > 0) {
	      n_vrb_dl = (n_rb_dl / (2*n_gap)) * (2*n_gap);  /* 36 */
	    } else {
	      n_vrb_dl = 2*((n_gap < (n_rb_dl - n_gap)) ? n_gap : (n_rb_dl - n_gap));  /* expect: 46 */
	    }
	    first_rb = 28;
	    break;
	  case 100:
	    n_gap = GAP_MAP[8][gap_index];  /* expect: 48 or 16 */
	    if (gap_index > 0) {
	      n_vrb_dl = (n_rb_dl / (2*n_gap)) * (2*n_gap);  /* expect: 96 */
	    } else {
	      n_vrb_dl = 2*((n_gap < (n_rb_dl - n_gap)) ? n_gap : (n_rb_dl - n_gap));  /* expect: 96 */
	    }
	    first_rb = 52;
	    break;
	  }
	}
	/* Get MCS for length of PCH */
	if (pcch_sdu_length <= TBStable1C[0]) {
	  mcs=0;
	} else if (pcch_sdu_length <= TBStable1C[1]) {
	  mcs=1;
	} else if (pcch_sdu_length <= TBStable1C[2]) {
	  mcs=2;
	} else if (pcch_sdu_length <= TBStable1C[3]) {
	  mcs=3;
	} else if (pcch_sdu_length <= TBStable1C[4]) {
	  mcs=4;
	} else if (pcch_sdu_length <= TBStable1C[5]) {
	  mcs=5;
	} else if (pcch_sdu_length <= TBStable1C[6]) {
	  mcs=6;
	} else if (pcch_sdu_length <= TBStable1C[7]) {
	  mcs=7;
	} else if (pcch_sdu_length <= TBStable1C[8]) {
	  mcs=8;
	} else if (pcch_sdu_length <= TBStable1C[9]) {
	  mcs=9;
	} else {
	  /* unexpected: pcch sdb size is over max value*/
	  LOG_E(MAC,"[eNB %d] Frame %d : PCCH->PCH CC_id %d, Received %d bytes is over max length(256) \n",
		module_idP, frameP,CC_id, pcch_sdu_length);
	  return;
	}
	rb_num = TBStable1C[mcs] / rb_bit + ( (TBStable1C[mcs] % rb_bit == 0)? 0: 1) + 1;
	/* calculate N_RB_STEP and Lcrbs */
	if (n_rb_dl < 50) {
	  n_rb_step = 2;
	  Lcrbs = rb_num / 2 + ((rb_num % 2 == 0) ? 0:2);
	} else {
	  n_rb_step = 4;
	  Lcrbs = rb_num / 4 + ((rb_num % 4 == 0) ? 0:4);
	}
	for(i = 0;i < Lcrbs ;i++){
	  vrb_map[first_rb+i] = 1;
	}
1949
#else
1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976
	//NO SIB
	if ((subframeP == 1 || subframeP == 2 || subframeP == 4 || subframeP == 6 || subframeP == 9) ||
	    (subframeP == 5 && ((frameP % 2) != 0 && (frameP % 8) != 1))) {
	  switch (n_rb_dl) {
	  case 25:
	    first_rb = 10;
	    break;
	  case 50:
	    first_rb = 24;
	    break;
	  case 100:
	    first_rb = 48;
	    break;
	  }
	} else if (subframeP == 5 && ((frameP % 2) == 0 || (frameP % 8) == 1)) {  // SIB + paging
	  switch (n_rb_dl) {
	  case 25:
	    first_rb = 14;
	    break;
	  case 50:
	    first_rb = 28;
	    break;
	  case 100:
	    first_rb = 52;
	    break;
	  }
	}
1977

1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
	vrb_map[first_rb] = 1;
	vrb_map[first_rb+1] = 1;
	vrb_map[first_rb+2] = 1;
	vrb_map[first_rb+3] = 1;
	/* Get MCS for length of PCH */
	if (pcch_sdu_length <= get_TBS_DL(0,3)) {
	  mcs=0;
	} else if (pcch_sdu_length <= get_TBS_DL(1,3)) {
	  mcs=1;
	} else if (pcch_sdu_length <= get_TBS_DL(2,3)) {
	  mcs=2;
	} else if (pcch_sdu_length <= get_TBS_DL(3,3)) {
	  mcs=3;
	} else if (pcch_sdu_length <= get_TBS_DL(4,3)) {
	  mcs=4;
	} else if (pcch_sdu_length <= get_TBS_DL(5,3)) {
	  mcs=5;
	} else if (pcch_sdu_length <= get_TBS_DL(6,3)) {
	  mcs=6;
	} else if (pcch_sdu_length <= get_TBS_DL(7,3)) {
	  mcs=7;
	} else if (pcch_sdu_length <= get_TBS_DL(8,3)) {
	  mcs=8;
	} else if (pcch_sdu_length <= get_TBS_DL(9,3)) {
	  mcs=9;
	}
2004
#endif
2005 2006 2007 2008
	dl_config_pdu                                                         = &dl_req->dl_config_pdu_list[dl_req->number_pdu];
	memset((void*)dl_config_pdu,0,sizeof(nfapi_dl_config_request_pdu_t));
	dl_config_pdu->pdu_type                                               = NFAPI_DL_CONFIG_DCI_DL_PDU_TYPE;
	dl_config_pdu->pdu_size                                               = (uint8_t)(2+sizeof(nfapi_dl_config_dci_dl_pdu));
2009
#ifdef FORMAT1C
2010 2011 2012
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.dci_format                  = NFAPI_DL_DCI_FORMAT_1C;
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.resource_block_coding       = getRIV(n_vrb_dl/n_rb_step, first_rb/n_rb_step, Lcrbs/n_rb_step);
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.ngap                        = n_gap;
2013
#else
2014 2015 2016 2017 2018 2019 2020
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.dci_format                  = NFAPI_DL_DCI_FORMAT_1A;
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.harq_process                = 0;
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.tpc                         = 1; // no TPC
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.new_data_indicator_1        = 1;
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.redundancy_version_1        = 1;
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.resource_block_coding       = getRIV(n_rb_dl,first_rb,4);
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.virtual_resource_block_assignment_flag = 0;
2021
#endif
2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.aggregation_level           = 4;
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti                        = 0xFFFE; // P-RNTI
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti_type                   = 2;    // P-RNTI : see Table 4-10 from SCF082 - nFAPI specifications
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.transmission_power          = 6000; // equal to RS power
	dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.mcs_1                       = mcs;

	// Rel10 fields
	dl_config_pdu->dlsch_pdu.dlsch_pdu_rel10.pdsch_start                           = 3;
	// Rel13 fields
	dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.ue_type                               = 0; // regular UE
	dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.pdsch_payload_type                    = 2; // not BR
	dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.initial_transmission_sf_io            = 0xFFFF;

	if (!CCE_allocation_infeasible(module_idP, CC_id, 0, subframeP, dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.aggregation_level, P_RNTI)) {
	  LOG_D(MAC,"Frame %d: Subframe %d : Adding common DCI for P_RNTI\n", frameP,subframeP);
	  dl_req->number_dci++;
	  dl_req->number_pdu++;
	  dl_config_pdu                                                                  = &dl_req->dl_config_pdu_list[dl_req->number_pdu];
	  memset((void*)dl_config_pdu,0,sizeof(nfapi_dl_config_request_pdu_t));
	  dl_config_pdu->pdu_type                                                        = NFAPI_DL_CONFIG_DLSCH_PDU_TYPE;
	  dl_config_pdu->pdu_size                                                        = (uint8_t)(2+sizeof(nfapi_dl_config_dlsch_pdu));
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.pdu_index                              = eNB->pdu_index[CC_id];
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.rnti                                   = 0xFFFE;
2045
#ifdef FORMAT1C
2046 2047
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_allocation_type               = 3;   // format 1C
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_block_coding                  = getRIV(n_vrb_dl/n_rb_step, first_rb/n_rb_step, Lcrbs/n_rb_step);
2048
#else
2049 2050 2051
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_allocation_type               = 2;   // format 1A/1B/1D
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_block_coding                  = getRIV(n_rb_dl,first_rb,4);
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.virtual_resource_block_assignment_flag = 0;   // localized
2052
#endif
2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.modulation                             = 2; //QPSK
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.redundancy_version                     = 1;
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.transport_blocks                       = 1;// first block
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.transport_block_to_codeword_swap_flag  = 0;
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.transmission_scheme                    = (cc->p_eNB==1 ) ? 0 : 1;
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.number_of_layers                       = 1;
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.number_of_subbands                     = 1;
	  // dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.codebook_index                         = ;
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.ue_category_capacity                   = 1;
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.pa                                     = 4; // 0 dB
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.delta_power_offset_index               = 0;
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.ngap                                   = 0;
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.nprb                                   = get_subbandsize(cc->mib->message.dl_Bandwidth); // ignored
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.transmission_mode                      = (cc->p_eNB==1 ) ? 1 : 2;
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.num_bf_prb_per_subband                 = 1;
	  dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.num_bf_vector                          = 1;
	  // dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.bf_vector                    = ;
	  dl_req->number_pdu++;

	  eNB->TX_req[CC_id].sfn_sf                                                     = (frameP<<4)+subframeP;
	  TX_req                                                                         = &eNB->TX_req[CC_id].tx_request_body.tx_pdu_list[eNB->TX_req[CC_id].tx_request_body.number_of_pdus];
	  TX_req->pdu_length                                                             = pcch_sdu_length;
	  TX_req->pdu_index                                                              = eNB->pdu_index[CC_id]++;
	  TX_req->num_segments                                                           = 1;
	  TX_req->segments[0].segment_length                                             = pcch_sdu_length;
	  TX_req->segments[0].segment_data                                               = cc[CC_id].PCCH_pdu.payload;
	  eNB->TX_req[CC_id].tx_request_body.number_of_pdus++;
	} else {
	  LOG_E(MAC,"[eNB %d] CCid %d Frame %d, subframe %d : Cannot add DCI 1A/1C for Paging\n",module_idP, CC_id, frameP, subframeP);
	  continue;
	}
2084

2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109
	if (opt_enabled == 1) {
	  trace_pdu(1,
		    &eNB->common_channels[CC_id].PCCH_pdu.payload[0],
		    pcch_sdu_length,
		    0xffff,
		    PCCH,
		    P_RNTI,
		    eNB->frame,
		    eNB->subframe,
		    0,
		    0);
	  LOG_D(OPT,"[eNB %d][PCH] Frame %d trace pdu for CC_id %d rnti %x with size %d\n",
		module_idP, frameP, CC_id, 0xffff, pcch_sdu_length);
	}
	eNB->eNB_stats[CC_id].total_num_pcch_pdu+=1;
	eNB->eNB_stats[CC_id].pcch_buffer=pcch_sdu_length;
	eNB->eNB_stats[CC_id].total_pcch_buffer+=pcch_sdu_length;
	eNB->eNB_stats[CC_id].pcch_mcs=mcs;
	//paging first_rb log
	LOG_D(MAC,"[eNB %d] Frame %d subframe %d PCH: paging_ue_index %d pcch_sdu_length %d mcs %d first_rb %d\n",
	      module_idP, frameP, subframeP, UE_PF_PO[CC_id][i].ue_index_value, pcch_sdu_length, mcs, first_rb);

	pthread_mutex_lock(&ue_pf_po_mutex);
	memset(&UE_PF_PO[CC_id][i], 0, sizeof(UE_PF_PO_t));
	pthread_mutex_unlock(&ue_pf_po_mutex);
2110 2111 2112 2113 2114 2115 2116
      }
    }
  }
  /* this might be misleading when pcch is inactive */
  stop_meas(&eNB->schedule_pch);
  return;
}