eNB_scheduler_dlsch.c 76.8 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 "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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//------------------------------------------------------------------------------
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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    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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    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;

    ce_ptr = &mac_header_control_elements[0];

    // compute header components

    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;
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    }
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    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;
	}

	mac_header_ptr->R = 0;
	mac_header_ptr->E = 0;
	mac_header_ptr->LCID = DRX_CMD;
	last_size = 1;
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    }
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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;
	}

	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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    }
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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;
	}

	mac_header_ptr->R = 0;
	mac_header_ptr->E = 0;
	mac_header_ptr->LCID = UE_CONT_RES;
	last_size = 1;

	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]);

	memcpy(ce_ptr, ue_cont_res_id, 6);
	ce_ptr += 6;
	// msg("(cont_res) : offset %d\n",ce_ptr-mac_header_control_elements);
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    }
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    //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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	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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    /*

       printf("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);

       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);


       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));
       }
     */
    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);
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    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);
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    }
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    //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;

	case 1:
	    switch (subframeP) {
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	    case 0:
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	    case 1:
		UE_list->UE_template[CC_idP][UE_idP].DAI_ul[7] = DAI;
		break;

	    case 4:
		UE_list->UE_template[CC_idP][UE_idP].DAI_ul[8] = DAI;
		break;

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	    case 5:
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	    case 6:
		UE_list->UE_template[CC_idP][UE_idP].DAI_ul[2] = DAI;
		break;

	    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;

	case 3:

	    //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;

	    case 7:
	    case 8:
		UE_list->UE_template[CC_idP][UE_idP].DAI_ul[3] = DAI;
		break;

	    case 9:
	    case 0:
		UE_list->UE_template[CC_idP][UE_idP].DAI_ul[4] = DAI;
		break;

	    default:
		break;
	    }
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	    break;
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	case 4:
	    //      if ((subframeP==8)||(subframeP==9))
	    //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
	    break;
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	case 5:
	    //      if (subframeP==8)
	    //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
	    break;
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	case 6:
	    //      if ((subframeP==1)||(subframeP==4)||(subframeP==6)||(subframeP==9))
	    //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
	    break;
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	default:
	    break;
	}
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    }
}

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#ifdef UE_EXPANSION
extern volatile int16_t phy_tx_txdataF_end;
extern int  oai_exit;
#endif
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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,
		 frame_t frameP, sub_frame_t subframeP, int *mbsfn_flag)
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//------------------------------------------------------------------------------
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{
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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);


    // 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))
		return;
	    break;
	case 5:
	    break;
	case 6:
	case 7:
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	    if ((tdd_sfa != 3)&& (tdd_sfa != 4) && (tdd_sfa != 5))
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		return;
	    break;
	case 8:
	    if ((tdd_sfa != 2) && (tdd_sfa != 3) && (tdd_sfa != 4)
		&& (tdd_sfa != 5))
		return;
	    break;
	case 9:
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	    if (tdd_sfa == 0)
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		return;
	    break;
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	  }
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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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    }
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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);
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  dlsch_scheduler_pre_processor(module_idP,
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                                frameP,
                                subframeP,
                                N_RBG,
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                                mbsfn_flag);
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  stop_meas(&eNB->schedule_dlsch_preprocessor);
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  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_PREPROCESSOR,VCD_FUNCTION_OUT);
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#ifdef UE_EXPANSION
  struct timespec time_req, time_rem;
  time_req.tv_sec = 0;
  time_req.tv_nsec = 10000;
#endif
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  for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
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    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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#ifdef UE_EXPANSION
    for (i = 0; i < dlsch_ue_select[CC_id].ue_num; i++) {
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      if(dlsch_ue_select[CC_id].list[i].ue_priority == SCH_DL_MSG2){
        continue;
      }
      if(dlsch_ue_select[CC_id].list[i].ue_priority == SCH_DL_MSG4){
        continue;
      }
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      UE_id = dlsch_ue_select[CC_id].list[i].UE_id;
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      rnti = UE_RNTI(module_idP,UE_id);
      if (rnti==NOT_A_RNTI) {
        LOG_E(MAC,"Cannot find rnti for UE_id %d (num_UEs %d)\n",UE_id,UE_list->num_UEs);
        continue;
      }

      eNB_UE_stats = &UE_list->eNB_UE_stats[CC_id][UE_id];
      ue_sched_ctl = &UE_list->UE_sched_ctrl[UE_id];

      switch(get_tmode(module_idP,CC_id,UE_id)){
      case 1:
      case 2:
      case 7:
        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;
        break;
      }
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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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#else
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    for (UE_id=UE_list->head; UE_id>=0; UE_id=UE_list->next[UE_id]) {
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      continue_flag=0; // reset the flag to allow allocation for the remaining UEs
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      rnti = UE_RNTI(module_idP,UE_id);
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      eNB_UE_stats = &UE_list->eNB_UE_stats[CC_id][UE_id];
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      ue_sched_ctl = &UE_list->UE_sched_ctrl[UE_id];
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      if (rnti==NOT_A_RNTI) {
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        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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      }
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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 (continue_flag != 1){
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        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), 
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					ue_sched_ctl->dl_cqi[CC_id],
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					format1);
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		    break;
		case 3:
		    aggregation =
			get_aggregation(get_bw_index(module_idP, CC_id),
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					ue_sched_ctl->dl_cqi[CC_id],
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					format2A);
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		    break;
		default:
		    LOG_W(MAC, "Unsupported transmission mode %d\n",
			  get_tmode(module_idP, CC_id, UE_id));
		    aggregation = 2;
		}
	    }
	    /* 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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#endif
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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)
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	    harq_pid = frame_subframe2_dl_harq_pid(cc->tdd_Config,frameP ,subframeP);
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	    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;
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	    /*
	       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);
	     */
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            if (nfapi_mode) {
              eNB_UE_stats->dlsch_mcs1 = 10;//cqi_to_mcs[ue_sched_ctl->dl_cqi[CC_id]];
            }
            else {
              eNB_UE_stats->dlsch_mcs1 = cqi_to_mcs[ue_sched_ctl->dl_cqi[CC_id]];
            }
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	    eNB_UE_stats->dlsch_mcs1 = eNB_UE_stats->dlsch_mcs1;	//cmin(eNB_UE_stats->dlsch_mcs1, openair_daq_vars.target_ue_dl_mcs);
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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;
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	    }
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	    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) {

		// 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].
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				      DAI,subframeP);
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			LOG_D(MAC,
			      "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;
				} else {
				    nb_rb_temp =
					nb_rb_temp - min_rb_unit[CC_id];
				}
			    }

			    j = j + 1;
			}
		    }

		    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];

		       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:
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                      LOG_D(MAC,"retransmission DL_REQ: rnti:%x\n",rnti);
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			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));
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                        dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.tl.tag = NFAPI_DL_CONFIG_REQUEST_DCI_DL_PDU_REL8_TAG;
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			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;

			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]);

			}
			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++;
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                            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;
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			    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);

		    //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

		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,
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			      "[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,
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			      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]);
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            pthread_mutex_lock(&rrc_release_freelist);
            if(rrc_release_info.num_UEs > 0){
              uint16_t release_total = 0;
              for(uint16_t release_num = 0;release_num < NUMBER_OF_UE_MAX;release_num++){
                if(rrc_release_info.RRC_release_ctrl[release_num].flag == 1){
                 release_total++;
                  if( (rrc_release_info.RRC_release_ctrl[release_num].rnti == rnti) &&
                      (rrc_release_info.RRC_release_ctrl[release_num].rrc_eNB_mui == rlc_status.rrc_mui)){
                      rrc_release_info.RRC_release_ctrl[release_num].flag = 3;
                  }
                }
                if(rrc_release_info.RRC_release_ctrl[release_num].flag == 2){
                    release_total++;
                    if( (rrc_release_info.RRC_release_ctrl[release_num].rnti == rnti) &&
                        (rrc_release_info.RRC_release_ctrl[release_num].rrc_eNB_mui == rlc_status.rrc_mui)){
                        rrc_release_info.RRC_release_ctrl[release_num].flag = 4;
                    }
                }
                if(release_total >= rrc_release_info.num_UEs)
                  break;
              }
            }
            pthread_mutex_unlock(&rrc_release_freelist);
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            RA_t *ra = &eNB->common_channels[CC_id].ra[0];
            for (uint8_t ra_ii = 0; ra_ii < NB_RA_PROC_MAX; ra_ii++) {
              if((ra[ra_ii].rnti == rnti) && (ra[ra_ii].state == MSGCRNTI) &&
                 (ra[ra_ii].crnti_rrc_mui == rlc_status.rrc_mui)){
                ra[ra_ii].crnti_harq_pid = harq_pid;
                ra[ra_ii].state = MSGCRNTI_ACK;
                break;
              }
            }
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			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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#ifdef DEBUG_eNB_SCHEDULER
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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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1088
#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).
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#if defined(UE_EXPANSION) || defined(UE_EXPANSION_SIM2)
		lcid = DTCH;
		{
#else
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		for (lcid = NB_RB_MAX - 1; lcid >= DTCH; lcid--) {
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#endif
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		    // 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++;
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                            UE_list->UE_sched_ctrl[UE_id].uplane_inactivity_timer = 0;
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			}	// 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];
				}
			    }

			    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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#ifdef DEBUG_eNB_SCHEDULER
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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
		    }

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#ifdef UE_EXPANSION
		    while((!oai_exit)&&(phy_tx_txdataF_end == 0)){
		      nanosleep(&time_req,&time_rem);
		        continue;
		    }
#endif
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		    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);
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          // memcpy(RC.mac[0].DLSCH_pdu[0][0].payload[0][offset],dcch_buffer,sdu_lengths[0]);
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          // fill remainder of DLSCH with random data
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          for (j=0; j<(TBS-sdu_length_total-offset); j++) {
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            UE_list->DLSCH_pdu[CC_id][0][UE_id].payload[0][offset+sdu_length_total+j] = (char)(taus()&0xff);
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          }
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          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),
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                      eNB->frame, eNB->subframe,0,0);
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            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);
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          }

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          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));

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

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          if (cc[CC_id].tdd_Config != NULL) { // TDD
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            UE_list->UE_template[CC_id][UE_id].DAI++;
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            update_ul_dci(module_idP,CC_id,rnti,UE_list->UE_template[CC_id][UE_id].DAI,subframeP);
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          }

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	  // do PUCCH power control
          // this is the normalized RX power
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	  eNB_UE_stats =  &UE_list->eNB_UE_stats[CC_id][UE_id];
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          /* TODO: fix how we deal with power, unit is not dBm, it's special from nfapi */
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	  normalized_rx_power = ue_sched_ctl->pucch1_snr[CC_id];
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	  target_rx_power = 208;
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          // this assumes accumulated tpc
	  // make sure that we are only sending a tpc update once a frame, otherwise the control loop will freak out
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	  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
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	    if (ue_sched_ctl->pucch1_cqi_update[CC_id] == 1) { 
	      ue_sched_ctl->pucch1_cqi_update[CC_id] = 0;
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	      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;
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	      if (normalized_rx_power>(target_rx_power+4)) {
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		tpc = 0; //-1
		tpc_accumulated--;
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	      } else if (normalized_rx_power<(target_rx_power-4)) {
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		tpc = 2; //+1
		tpc_accumulated++;
	      } else {
		tpc = 1; //0
	      }
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	      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",
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		    module_idP,frameP, subframeP,harq_pid,tpc,
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		    tpc_accumulated,normalized_rx_power,target_rx_power);
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	    } // Po_PUCCH has been updated 
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	    else {
	      tpc = 1; //0
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	    } // time to do TPC update 
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	  else {
	    tpc = 1; //0
	  }

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	  dl_config_pdu                                                         = &dl_req->dl_config_pdu_list[dl_req->number_pdu]; 
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	  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; 
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	  dl_config_pdu->pdu_size                                               = (uint8_t)(2+sizeof(nfapi_dl_config_dci_dl_pdu));
1440
	  dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.dci_format                  = NFAPI_DL_DCI_FORMAT_1;
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	  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);
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	  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;
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	    LOG_D(MAC,"[eNB %d] Initial transmission CC_id %d : harq_pid %d, dai %d, mcs %d\n",
		  module_idP,CC_id,harq_pid,
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		  (UE_list->UE_template[CC_id][UE_id].DAI-1),
		  mcs);
	  } else {
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	    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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	  }
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	  LOG_D(MAC,"Checking feasibility pdu %d (new sdu)\n",dl_req->number_pdu);
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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)) {
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	    ue_sched_ctl->round[CC_id][harq_pid] = 0;
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	    dl_req->number_dci++;
	    dl_req->number_pdu++;
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	    dl_req->tl.tag = NFAPI_DL_CONFIG_REQUEST_BODY_TAG;
1473
	    
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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,
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							  eNB->pdu_index[CC_id],
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							  eNB->UE_list.DLSCH_pdu[CC_id][0][(unsigned char)UE_id].payload[0]);
1516
	    
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	    LOG_D(MAC,"Filled NFAPI configuration for DCI/DLSCH/TXREQ %d, new SDU\n",eNB->pdu_index[CC_id]);
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	    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);
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#ifdef UE_EXPANSION
        last_dlsch_ue_id[CC_id] = UE_id;
#endif
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	  }
	  else {
	    LOG_W(MAC,"Frame %d, Subframe %d: Dropping DLSCH allocation for UE %d/%x, infeasible CCE allocations\n",
		  frameP,subframeP,UE_id,rnti);
	  }
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        } else {  // There is no data from RLC or MAC header, so don't schedule
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        }
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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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      }
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    } // UE_id loop
  }  // CC_id loop
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1542
  fill_DLSCH_dci(module_idP,frameP,subframeP,mbsfn_flag);
1543
  stop_meas(&eNB->schedule_dlsch);
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  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
fill_DLSCH_dci(
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	       module_id_t module_idP,
	       frame_t frameP,
	       sub_frame_t subframeP,
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	       int* mbsfn_flagP)
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//------------------------------------------------------------------------------
1557
{
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  // loop over all allocated UEs and compute frequency allocations for PDSCH
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  int   UE_id = -1;
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  uint8_t            /* first_rb, */ nb_rb=3;
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  rnti_t        rnti;
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  //unsigned char *vrb_map;
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  uint8_t            rballoc_sub[25];
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  //uint8_t number_of_subbands=13;

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  //unsigned char round;
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  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;
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#ifdef UE_EXPANSION
  int               j;
#endif
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  start_meas(&eNB->fill_DLSCH_dci);
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  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_FILL_DLSCH_DCI,VCD_FUNCTION_IN);
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  for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
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    LOG_D(MAC,"Doing fill DCI for CC_id %d\n",CC_id);
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    if (mbsfn_flagP[CC_id]>0)
      continue;
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    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);
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    // UE specific DCIs
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#ifdef UE_EXPANSION
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    for (j = 0; j < dlsch_ue_select[CC_id].ue_num; j++) {
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        if(dlsch_ue_select[CC_id].list[j].ue_priority == SCH_DL_MSG2){
          continue;
        }
        if(dlsch_ue_select[CC_id].list[j].ue_priority == SCH_DL_MSG4){
          continue;
        }
        UE_id = dlsch_ue_select[CC_id].list[j].UE_id;
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#else
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    for (UE_id=UE_list->head; UE_id>=0; UE_id=UE_list->next[UE_id]) {
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#endif
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      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);
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      if (eNB_dlsch_info[module_idP][CC_id][UE_id].status == S_DL_SCHEDULED) {
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        // clear scheduling flag
        eNB_dlsch_info[module_idP][CC_id][UE_id].status = S_DL_WAITING;
        rnti = UE_RNTI(module_idP,UE_id);
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	if (cc->tdd_Config) harq_pid = frame_subframe2_dl_harq_pid(cc->tdd_Config,frameP ,subframeP);
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	else harq_pid = ((frameP*10)+subframeP)&7;
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        nb_rb = UE_list->UE_template[CC_id][UE_id].nb_rb[harq_pid];


1617
	
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        /// Synchronizing rballoc with rballoc_sub
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        for(i=0; i<N_RBG; i++) {
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          rballoc_sub[i] = UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][i];
1621
        }
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1623
	nfapi_dl_config_request_t      *DL_req         = &RC.mac[module_idP]->DL_req[0];
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	nfapi_dl_config_request_pdu_t* dl_config_pdu;
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	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];
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	  if ((dl_config_pdu->pdu_type == NFAPI_DL_CONFIG_DCI_DL_PDU_TYPE)&&
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	      (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)) {
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	    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;
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	  }
	  else if ((dl_config_pdu->pdu_type == NFAPI_DL_CONFIG_DLSCH_PDU_TYPE)&&
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		       (dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.rnti == rnti) &&
               (dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_allocation_type==0)) {
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	    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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//------------------------------------------------------------------------------
1654
{
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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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1673
  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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1691
//------------------------------------------------------------------------------
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void
update_ul_dci(module_id_t module_idP,
1694
	      uint8_t CC_idP, rnti_t rntiP, uint8_t daiP, sub_frame_t subframe)
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//------------------------------------------------------------------------------
1696
{
1697

1698
    nfapi_hi_dci0_request_t *HI_DCI0_req =
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	&RC.mac[module_idP]->HI_DCI0_req[CC_idP][subframe];
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    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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1706 1707 1708 1709 1710
    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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1717
	}
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    }
}


1722
//------------------------------------------------------------------------------
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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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//------------------------------------------------------------------------------
1728
{
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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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1736
	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;
	}
1743

1744
	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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1751
	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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1758
	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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1765
	break;
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    case 5:
	if (subframeP == 9) {
	    UE_list->UE_template[CC_id][UE_id].DAI = 0;
	}
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1772
	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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1780
	break;
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1782 1783 1784 1785 1786
    default:
	UE_list->UE_template[CC_id][UE_id].DAI = 0;
	LOG_N(MAC, "unknow TDD config %d\n", tdd_config);
	break;
    }
1787
}
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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] = {
                                                    {-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] */
                                                  };
  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 */
  #endif

  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;
1831
    for (uint16_t i = 0; i < NUMBER_OF_UE_MAX; i++) {
1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 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 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 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 1949 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 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 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 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 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 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135
      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) {
      pcch_sdu_length = mac_rrc_data_req(module_idP,
                                           CC_id,
                                           frameP,
                                           PCCH,1,
                                           &cc->PCCH_pdu.payload[0],
                                           1,
                                           module_idP,
                                           i); // used for ue index
      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);
#ifdef FORMAT1C
      //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) {
#if 0
        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;
#endif
        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) {
#if 0
        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;
#endif
        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;
      }
#else
      //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;
        }
      }

      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;
      }
#endif
      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));
#ifdef FORMAT1C
      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;
#else
      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;
#endif
      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;
#ifdef FORMAT1C
        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);
#else
        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
#endif
        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;
      }

      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);
    }
    }
  }
  /* this might be misleading when pcch is inactive */
  stop_meas(&eNB->schedule_pch);
  return;
}