eNB_scheduler_bch.c 32.7 KB
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/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.0  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */
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/*! \file eNB_scheduler_bch.c
 * \brief procedures related to eNB for the BCH 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"

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

#define ENABLE_MAC_PAYLOAD_DEBUG
#define DEBUG_eNB_SCHEDULER 1


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// NEED TO ADD schedule_SI_BR for SIB1_BR and SIB23_BR
// CCE_allocation_infeasible to be done for EPDCCH/MPDCCH

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#ifdef Rel14

#define size_Sj25 2
int Sj25[size_Sj25]={0,3};
#define size_Sj50 6
int Sj50[size_Sj50]={0,1,2,5,6,7};
#define size_Sj75 10
int Sj75[size_Sj75]={0,1,2,3,4,7,8,9,10,11};
#define size_Sj100 14
int Sj100[size_Sj100]={0,1,2,3,4,5,6,9,10,11,12,13,14,15};

int SIB1_BR_TBS_table[6] = {208,256,328,504,712,936};

//------------------------------------------------------------------------------
void
schedule_SIB1_BR(
		 module_id_t   module_idP,
		 frame_t       frameP,
		 sub_frame_t   subframeP)

//------------------------------------------------------------------------------
{

  int8_t                         bcch_sdu_length;
  int                            CC_id;
  eNB_MAC_INST                   *eNB = RC.mac[module_idP];
  COMMON_channels_t              *cc;
  uint8_t                        *vrb_map;
  int                            first_rb = -1;
  int                            N_RB_DL;
  nfapi_dl_config_request_pdu_t  *dl_config_pdu;
  nfapi_tx_request_pdu_t         *TX_req;
  nfapi_dl_config_request_body_t *dl_req;
  int                            m,i,N_S_NB;
  int                            *Sj;
  int                            n_NB = 0;
  int                            TBS;
  int                            k,rvidx;

  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;

    int foffset  = cc->physCellId&1;
    int sfoffset = (cc->tdd_Config==NULL) ? 0 : 1;

    // Time-domain scheduling
    if (cc->mib->message.schedulingInfoSIB1_BR_r13==0) continue;
    else 
      switch ((cc->mib->message.schedulingInfoSIB1_BR_r13-1)%3) {
	case 0: // repetition 4
	  k = (frameP>>1)&3;
	  if ((subframeP!=(4+sfoffset)) || ((frameP&1)!=foffset)) continue;
	  break;
	case 1: // repetition 8
	  k = frameP&3;
	  AssertFatal(N_RB_DL<=15,"SIB1-BR repetition 8 not allowed for N_RB_DL= %d\n",N_RB_DL);
	  if      ((foffset==0) && (subframeP!=(4+sfoffset))) continue;
	  else if ((foffset==1) && (subframeP!=((9+sfoffset)%10))) continue;
	  break;
	case 2: // repetition 16
	  k = ((10*frameP) + subframeP)&3;
	  AssertFatal(N_RB_DL<=15,"SIB1-BR repetition 16 not allowed for N_RB_DL= %d\n",N_RB_DL);
	  if      ((sfoffset == 1) && ((subframeP!=0)||(subframeP!=5))) continue;
	  else if ((sfoffset == 0) && (foffset==0) && ((subframeP!=4) || (subframeP!=9))) continue;
	  else if ((sfoffset == 0) && (foffset==1) && ((subframeP!=0) || (subframeP!=9))) continue;
	  break;
      }
    // if we get here we have to schedule SIB1_BR in this frame/subframe

    // keep counter of SIB1_BR repetitions in 8 frame period to choose narrowband on which to transmit
    if ((frameP&7) == 0) cc->SIB1_BR_cnt=0;
    else                 cc->SIB1_BR_cnt++;

    // Frequency-domain scheduling
    switch (N_RB_DL) {
    case 6:
    case 15:
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      m=1;
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      n_NB=0;
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      N_S_NB=0;
      Sj=NULL;
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      break;
    case 25:
      m=2;
      N_S_NB = 2;
      Sj = Sj25;
      break;
    case 50:
      m=2;
      N_S_NB = 6;
      Sj = Sj50; 
      break;
    case 75:
      m=4;
      N_S_NB = 10;
      Sj = Sj75;
      break;
    case 100:
      m=4;
      N_S_NB = 14;
      Sj = Sj100;
      break;
    }

    rvidx = (((3*k)>>1) + (k&1))&3;
    
    i = cc->SIB1_BR_cnt & (m-1);
    
    n_NB =  Sj[((cc->physCellId % N_S_NB) + (i*N_S_NB/m))%N_S_NB];

    
    bcch_sdu_length = mac_rrc_data_req(module_idP,
                                       CC_id,
				       frameP,
                                       BCCH_SIB1_BR,1,
                                       &cc->BCCH_BR_pdu[0].payload[0],
                                       1,
                                       module_idP,
                                       0); // not used in this case

    AssertFatal(cc->mib->message.schedulingInfoSIB1_BR_r13<19,"schedulingInfoSIB1_BR_r13 %d > 18\n",
		(int)cc->mib->message.schedulingInfoSIB1_BR_r13);

    TBS = SIB1_BR_TBS_table[(cc->mib->message.schedulingInfoSIB1_BR_r13-1)/3]>>3;

    AssertFatal(bcch_sdu_length <= TBS, "length returned by RRC is not compatible with the TBS %d from MIB\n",TBS);

    if (bcch_sdu_length > 0) {
      LOG_D(MAC,"[eNB %d] Frame %d : BCCH_BR->DLSCH CC_id %d, Received %d bytes \n",module_idP,frameP,CC_id,bcch_sdu_length);

      // allocate all 6 PRBs in narrowband for SIB1_BR
      first_rb = n_NB*6;
      vrb_map[first_rb] = 1;
      vrb_map[first_rb+1] = 1;
      vrb_map[first_rb+2] = 1;
      vrb_map[first_rb+3] = 1;
      vrb_map[first_rb+4] = 1;
      vrb_map[first_rb+5] = 1;

      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.length                                 = TBS;
      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.pdu_index                              = eNB->pdu_index[CC_id];
      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.rnti                                   = 0xFFFF;
      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_allocation_type               = 2;   // format 1A/1B/1D
      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.virtual_resource_block_assignment_flag = 0;   // localized
      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_block_coding                  = getRIV(N_RB_DL,first_rb,6);
      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.modulation                             = 2; //QPSK
      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.redundancy_version                     = rvidx;
      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;
      // Rel13 fields
      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.ue_type                               = 1; // CEModeA UE
      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.pdsch_payload_type                    = 0; // SIB1-BR
      dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.initial_transmission_sf_io            = 0xFFFF; // absolute SF

      //	dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.bf_vector                    = ; 
      dl_req->number_pdu++;

      // Program TX Request
      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                                                    = bcch_sdu_length;
      TX_req->pdu_index                                                     = eNB->pdu_index[CC_id]++;
      TX_req->num_segments                                                  = 1;
      TX_req->segments[0].segment_length                                    = bcch_sdu_length;
      TX_req->segments[0].segment_data                                      = cc->BCCH_BR_pdu[0].payload;
      eNB->TX_req[CC_id].tx_request_body.number_of_pdus++;
      
    
      
      if (opt_enabled == 1) {
        trace_pdu(1,
                  &cc->BCCH_BR_pdu[0].payload[0],
                  bcch_sdu_length,
                  0xffff,
                  4,
                  0xffff,
                  eNB->frame,
                  eNB->subframe,
                  0,
                  0);
	LOG_D(OPT,"[eNB %d][BCH] Frame %d trace pdu for CC_id %d rnti %x with size %d\n",
	      module_idP, frameP, CC_id, 0xffff, bcch_sdu_length);
      }
      if (cc->tdd_Config!=NULL) { //TDD
        LOG_D(MAC,"[eNB] Frame %d : Scheduling BCCH-BR 0->DLSCH (TDD) for CC_id %d SIB1-BR %d bytes\n",
              frameP,
              CC_id,
              bcch_sdu_length);
      } else {
        LOG_D(MAC,"[eNB] Frame %d : Scheduling BCCH-BR 0->DLSCH (FDD) for CC_id %d SIB1-BR %d bytes\n",
              frameP,
              CC_id,
              bcch_sdu_length);
      }
    } else {

      //LOG_D(MAC,"[eNB %d] Frame %d : BCCH not active \n",Mod_id,frame);
    }
  }

  return;
}

int si_WindowLength_BR_r13tab[SystemInformationBlockType1_v1310_IEs__bandwidthReducedAccessRelatedInfo_r13__si_WindowLength_BR_r13_spare] = 
  {20,40,60,80,120,160,200};
int si_TBS_r13tab[SchedulingInfo_BR_r13__si_TBS_r13_b936+1] = {152,208,256,328,408,504,600,712,808,936};

//------------------------------------------------------------------------------
void
schedule_SI_BR(
	       module_id_t   module_idP,
	       frame_t       frameP,
	       sub_frame_t   subframeP)
  
//------------------------------------------------------------------------------
{

  int8_t                                  bcch_sdu_length;
  int                                     CC_id;
  eNB_MAC_INST                            *eNB = RC.mac[module_idP];
  COMMON_channels_t                       *cc;
  uint8_t                                 *vrb_map;
  int                                     first_rb = -1;
  int                                     N_RB_DL;
  nfapi_dl_config_request_pdu_t           *dl_config_pdu;
  nfapi_tx_request_pdu_t                  *TX_req;
  nfapi_dl_config_request_body_t          *dl_req;
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  int                                     i;
  int                                     rvidx;
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  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;

    // Time-domain scheduling
    if (cc->mib->message.schedulingInfoSIB1_BR_r13==0) continue;
    else  {


      AssertFatal(cc->sib1_v13ext->bandwidthReducedAccessRelatedInfo_r13!=NULL,
		  "sib_v13ext->bandwidthReducedAccessRelatedInfo_r13 is null\n");

      SchedulingInfoList_BR_r13_t *schedulingInfoList_BR_r13 = cc->sib1_v13ext->bandwidthReducedAccessRelatedInfo_r13->schedulingInfoList_BR_r13;
      AssertFatal(schedulingInfoList_BR_r13!=NULL,
		  "sib_v13ext->schedulingInfoList_BR_r13 is null\n");

      SchedulingInfoList_t *schedulingInfoList = cc->schedulingInfoList;
      AssertFatal(schedulingInfoList_BR_r13->list.count==schedulingInfoList->list.count,
		  "schedulingInfolist_BR.r13->list.count %d != schedulingInfoList.list.count %d\n",
		  schedulingInfoList_BR_r13->list.count,schedulingInfoList->list.count); 

      AssertFatal(cc->sib1_v13ext->bandwidthReducedAccessRelatedInfo_r13->si_WindowLength_BR_r13<=SystemInformationBlockType1_v1310_IEs__bandwidthReducedAccessRelatedInfo_r13__si_WindowLength_BR_r13_ms200,
		  "si_WindowLength_BR_r13 %d > %d\n",
		  (int)cc->sib1_v13ext->bandwidthReducedAccessRelatedInfo_r13->si_WindowLength_BR_r13,
		  SystemInformationBlockType1_v1310_IEs__bandwidthReducedAccessRelatedInfo_r13__si_WindowLength_BR_r13_ms200);
		  
      long si_WindowLength_BR_r13   = si_WindowLength_BR_r13tab[cc->sib1_v13ext->bandwidthReducedAccessRelatedInfo_r13->si_WindowLength_BR_r13];

      long si_RepetitionPattern_r13 = cc->sib1_v13ext->bandwidthReducedAccessRelatedInfo_r13->si_RepetitionPattern_r13;
      AssertFatal(si_RepetitionPattern_r13<=SystemInformationBlockType1_v1310_IEs__bandwidthReducedAccessRelatedInfo_r13__si_RepetitionPattern_r13_every8thRF,
		  "si_RepetitionPattern_r13 %d > %d\n",
		  (int)si_RepetitionPattern_r13,
		  SystemInformationBlockType1_v1310_IEs__bandwidthReducedAccessRelatedInfo_r13__si_RepetitionPattern_r13_every8thRF);
      // cycle through SIB list

      for (i=0;i<schedulingInfoList_BR_r13->list.count;i++) {
	long si_Periodicity           = schedulingInfoList->list.array[i]->si_Periodicity;
	long si_Narrowband_r13        = schedulingInfoList_BR_r13->list.array[i]->si_Narrowband_r13;
	long si_TBS_r13               = si_TBS_r13tab[schedulingInfoList_BR_r13->list.array[i]->si_TBS_r13];

	// check if the SI is to be scheduled now
	int period_in_sf              = 80<<si_Periodicity; // 2^i * 80 subframes, note: si_Periodicity is 2^i * 80ms
	int sf_mod_period             = ((frameP*10)+subframeP)%period_in_sf;

	rvidx = (((3*sf_mod_period)>>1) + (sf_mod_period&1))&3;

        if ((sf_mod_period < si_WindowLength_BR_r13) &&
	    ((frameP&(((1<<si_RepetitionPattern_r13)-1)))==0)) { // this SIB is to be scheduled

	  bcch_sdu_length = mac_rrc_data_req(module_idP,
					     CC_id,
					     frameP,
					     BCCH_SI_BR+i,1,
					     &cc->BCCH_BR_pdu[i+1].payload[0],
					     1,
					     module_idP,
					     0); // not used in this case
	  
	  
	  if (bcch_sdu_length > 0) {
	    AssertFatal(bcch_sdu_length <= (si_TBS_r13>>3),
			"RRC provided bcch with length %d > %d\n",
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			bcch_sdu_length,(int)(si_TBS_r13>>3));
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	    LOG_D(MAC,"[eNB %d] Frame %d : BCCH_BR %d->DLSCH CC_id %d, Received %d bytes \n",module_idP,frameP,i,CC_id,bcch_sdu_length);
	    
	    // allocate all 6 PRBs in narrowband for SIB1_BR
	    first_rb = si_Narrowband_r13*6;
	    vrb_map[first_rb]   = 1;
	    vrb_map[first_rb+1] = 1;
	    vrb_map[first_rb+2] = 1;
	    vrb_map[first_rb+3] = 1;
	    vrb_map[first_rb+4] = 1;
	    vrb_map[first_rb+5] = 1;
	    
	    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.length                                 = si_TBS_r13>>3;
	    dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.pdu_index                              = eNB->pdu_index[CC_id];
	    dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.rnti                                   = 0xFFFF;
	    dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_allocation_type               = 2;   // format 1A/1B/1D
	    dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.virtual_resource_block_assignment_flag = 0;   // localized
	    dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_block_coding                  = getRIV(N_RB_DL,first_rb,6);
	    dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.modulation                             = 2; //QPSK
	    dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.redundancy_version                     = rvidx;
	    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;
	    // Rel13 fields
	    dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.ue_type                               = 1; // CEModeA UE
	    dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.pdsch_payload_type                    = 1; // SI-BR
	    dl_config_pdu->dlsch_pdu.dlsch_pdu_rel13.initial_transmission_sf_io            = 0xFFFF; // absolute SF
	    
	    //	dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.bf_vector                    = ; 
	    dl_req->number_pdu++;
	    
	    // Program TX Request
	    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                                                    = bcch_sdu_length;
	    TX_req->pdu_index                                                     = eNB->pdu_index[CC_id]++;
	    TX_req->num_segments                                                  = 1;
	    TX_req->segments[0].segment_length                                    = bcch_sdu_length;
	    TX_req->segments[0].segment_data                                      = cc->BCCH_BR_pdu[i+1].payload;
	    eNB->TX_req[CC_id].tx_request_body.number_of_pdus++;
	    
	    if (opt_enabled == 1) {
	      trace_pdu(1,
			&cc->BCCH_BR_pdu[i+1].payload[0],
			bcch_sdu_length,
			0xffff,
			4,
			0xffff,
			eNB->frame,
			eNB->subframe,
			0,
			0);
	      LOG_D(OPT,"[eNB %d][BCH] Frame %d trace pdu for CC_id %d rnti %x with size %d\n",
		    module_idP, frameP, CC_id, 0xffff, bcch_sdu_length);
	    }
	    if (cc->tdd_Config!=NULL) { //TDD
	      LOG_D(MAC,"[eNB] Frame %d : Scheduling BCCH-BR %d->DLSCH (TDD) for CC_id %d SI-BR %d bytes\n",
		    frameP,i,
		    CC_id,
		    bcch_sdu_length);
	    } else {
	      LOG_D(MAC,"[eNB] Frame %d : Scheduling BCCH-BR %d->DLSCH (FDD) for CC_id %d SI-BR %d bytes\n",
		    frameP,i,
		    CC_id,
		    bcch_sdu_length);
	    }
	  }
	} // scheduling in current frame/subframe
      } //for SI List
    } // eMTC is activated
  } // CC_id
  return;
}
#endif

void schedule_mib(module_id_t   module_idP,
		  frame_t       frameP,
		  sub_frame_t   subframeP) {

  eNB_MAC_INST                   *eNB = RC.mac[module_idP];
  COMMON_channels_t              *cc;
  nfapi_dl_config_request_pdu_t  *dl_config_pdu;
  nfapi_tx_request_pdu_t         *TX_req;
  int mib_sdu_length;
  int CC_id;
  nfapi_dl_config_request_body_t *dl_req;

  AssertFatal(subframeP==0,"Subframe must be 0\n");
  AssertFatal((frameP&3)==0,"Frame must be a multiple of 4\n");

  for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {

    dl_req          = &eNB->DL_req[CC_id].dl_config_request_body;
    cc              = &eNB->common_channels[CC_id];

    mib_sdu_length = mac_rrc_data_req(module_idP,
				      CC_id,
				      frameP,
				      MIBCH,1,
				      &cc->MIB_pdu.payload[0],
				      1,
				      module_idP,
				      0); // not used in this case

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    LOG_D(MAC,"Frame %d, subframe %d: BCH PDU length %d\n",
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	  frameP,subframeP,mib_sdu_length);

    if (mib_sdu_length > 0) {

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      LOG_D(MAC,"Frame %d, subframe %d: Adding BCH PDU in position %d (length %d)\n",
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	    frameP,subframeP,dl_req->number_pdu,mib_sdu_length);

      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_BCH_PDU_TYPE,
      dl_config_pdu->pdu_size                                               = 2+sizeof(nfapi_dl_config_bch_pdu);
      dl_config_pdu->bch_pdu.bch_pdu_rel8.length                            = mib_sdu_length;
      dl_config_pdu->bch_pdu.bch_pdu_rel8.pdu_index                         = eNB->pdu_index[CC_id];
      dl_config_pdu->bch_pdu.bch_pdu_rel8.transmission_power                = 6000;
      dl_req->number_pdu++;

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      LOG_D(MAC,"eNB->DL_req[0].number_pdu %d (%p)\n",
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	    dl_req->number_pdu,&dl_req->number_pdu);
      // DL request

      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                                                    = 3;
      TX_req->pdu_index                                                     = eNB->pdu_index[CC_id]++;
      TX_req->num_segments                                                  = 1;
      TX_req->segments[0].segment_length                                    = 0;
      TX_req->segments[0].segment_data                                      = cc[CC_id].MIB_pdu.payload;
      eNB->TX_req[CC_id].tx_request_body.number_of_pdus++;
    }
  }
}


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//------------------------------------------------------------------------------
void
schedule_SI(
  module_id_t   module_idP,
  frame_t       frameP,
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  sub_frame_t   subframeP)
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//------------------------------------------------------------------------------
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{
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  int8_t                         bcch_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                            first_rb = -1;
  int                            N_RB_DL;
  nfapi_dl_config_request_pdu_t  *dl_config_pdu;
  nfapi_tx_request_pdu_t         *TX_req;
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  nfapi_dl_config_request_body_t *dl_req;
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  start_meas(&eNB->schedule_si);

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  // Only schedule System Information in subframe 5
  if (subframeP != 5) return;

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  for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
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    cc              = &eNB->common_channels[CC_id];
    vrb_map         = (void*)&cc->vrb_map;
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    N_RB_DL         = to_prb(cc->mib->message.dl_Bandwidth); 
    dl_req          = &eNB->DL_req[CC_id].dl_config_request_body;

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    bcch_sdu_length = mac_rrc_data_req(module_idP,
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                                       CC_id,
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                                       frameP,
                                       BCCH,1,
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                                       &cc->BCCH_pdu.payload[0],
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                                       1,
                                       module_idP,
                                       0); // not used in this case

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    if (bcch_sdu_length > 0) {
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      LOG_D(MAC,"[eNB %d] Frame %d : BCCH->DLSCH CC_id %d, Received %d bytes \n",module_idP,frameP,CC_id,bcch_sdu_length);
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      // Allocate 4 PRBs in a random location
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      /*
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      while (1) {
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	first_rb = (unsigned char)(taus()%(PHY_vars_eNB_g[module_idP][CC_id]->frame_parms.N_RB_DL-4));
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	if ((vrb_map[first_rb] != 1) && 
	    (vrb_map[first_rb+1] != 1) && 
	    (vrb_map[first_rb+2] != 1) && 
	    (vrb_map[first_rb+3] != 1))
	  break;
      }
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      */
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      switch (N_RB_DL) {
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      case 6:
	first_rb = 0;
	break;
      case 15:
	first_rb = 6;
	break;
      case 25:
	first_rb = 11;
	break;
      case 50:
	first_rb = 23;
	break;
      case 100:
	first_rb = 48;
	break;
      }

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      vrb_map[first_rb] = 1;
      vrb_map[first_rb+1] = 1;
      vrb_map[first_rb+2] = 1;
      vrb_map[first_rb+3] = 1;
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      // Get MCS for length of SI, 3 PRBs
      if (bcch_sdu_length <= 7) {
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        mcs=0;
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      } else if (bcch_sdu_length <= 11) {
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        mcs=1;
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      } else if (bcch_sdu_length <= 18) {
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        mcs=2;
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      } else if (bcch_sdu_length <= 22) {
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        mcs=3;
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      } else if (bcch_sdu_length <= 26) {
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        mcs=4;
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      } else if (bcch_sdu_length <= 28) {
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        mcs=5;
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      } else if (bcch_sdu_length <= 32) {
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        mcs=6;
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      } else if (bcch_sdu_length <= 41) {
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        mcs=7;
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      } else if (bcch_sdu_length <= 49) {
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        mcs=8;
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      }
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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; 
      dl_config_pdu->pdu_size                                               = (uint8_t)(2+sizeof(nfapi_dl_config_dci_dl_pdu));
      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.dci_format                  = NFAPI_DL_DCI_FORMAT_1A;
      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.aggregation_level           = 4;
      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti                        = 0xFFFF;
      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti_type                   = 2;    // S-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.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.mcs_1                       = mcs;
      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.redundancy_version_1        = 0;

      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.resource_block_coding       = getRIV(N_RB_DL,first_rb,4);      
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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,SI_RNTI)) {
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	LOG_D(MAC,"Frame %d: Subframe %d : Adding common DCI for S_RNTI\n",
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	      frameP,subframeP);
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	dl_req->number_dci++;
	dl_req->number_pdu++;
	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_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                                   = 0xFFFF;
	dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.resource_allocation_type               = 2;   // format 1A/1B/1D
	dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.virtual_resource_block_assignment_flag = 0;   // localized
	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.modulation                             = 2; //QPSK
	dl_config_pdu->dlsch_pdu.dlsch_pdu_rel8.redundancy_version                     = 0;
	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                    = ; 
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	dl_req->number_pdu++;
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	// Program TX Request
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	TX_req                                                                = &eNB->TX_req[CC_id].tx_request_body.tx_pdu_list[eNB->TX_req[CC_id].tx_request_body.number_of_pdus]; 
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	TX_req->pdu_length                                                    = bcch_sdu_length;
	TX_req->pdu_index                                                     = eNB->pdu_index[CC_id]++;
	TX_req->num_segments                                                  = 1;
	TX_req->segments[0].segment_length                                    = bcch_sdu_length;
	TX_req->segments[0].segment_data                                      = cc->BCCH_pdu.payload;
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	eNB->TX_req[CC_id].tx_request_body.number_of_pdus++;
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      }
      else {
	LOG_E(MAC,"[eNB %d] CCid %d Frame %d, subframe %d : Cannot add DCI 1A for SI\n",module_idP, CC_id,frameP,subframeP);
      }

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      if (opt_enabled == 1) {
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        trace_pdu(1,
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                  &cc->BCCH_pdu.payload[0],
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                  bcch_sdu_length,
                  0xffff,
                  4,
                  0xffff,
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                  eNB->frame,
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                  eNB->subframe,
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                  0,
                  0);
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	LOG_D(OPT,"[eNB %d][BCH] Frame %d trace pdu for CC_id %d rnti %x with size %d\n",
	    module_idP, frameP, CC_id, 0xffff, bcch_sdu_length);
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      }
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      if (cc->tdd_Config!=NULL) { //TDD
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        LOG_D(MAC,"[eNB] Frame %d : Scheduling BCCH->DLSCH (TDD) for CC_id %d SI %d bytes (mcs %d, rb 3)\n",
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              frameP,
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              CC_id,
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              bcch_sdu_length,
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              mcs);
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      } else {
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        LOG_D(MAC,"[eNB] Frame %d : Scheduling BCCH->DLSCH (FDD) for CC_id %d SI %d bytes (mcs %d, rb 3)\n",
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              frameP,
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              CC_id,
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              bcch_sdu_length,
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              mcs);
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      }
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      eNB->eNB_stats[CC_id].total_num_bcch_pdu+=1;
      eNB->eNB_stats[CC_id].bcch_buffer=bcch_sdu_length;
      eNB->eNB_stats[CC_id].total_bcch_buffer+=bcch_sdu_length;
      eNB->eNB_stats[CC_id].bcch_mcs=mcs;
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    } else {
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      //LOG_D(MAC,"[eNB %d] Frame %d : BCCH not active \n",Mod_id,frame);
    }
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  }
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  // this might be misleading when bcch is inactive
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  stop_meas(&eNB->schedule_si);
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  return;
}
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