pre_processor.c 29.4 KB
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/*******************************************************************************
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    OpenAirInterface
    Copyright(c) 1999 - 2014 Eurecom
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    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
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    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
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    You should have received a copy of the GNU General Public License
    along with OpenAirInterface.The full GNU General Public License is
    included in this distribution in the file called "COPYING". If not,
    see <http://www.gnu.org/licenses/>.
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  Contact Information
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  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
  OpenAirInterface Dev  : openair4g-devel@eurecom.fr

  Address      : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.
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*******************************************************************************/
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/*! \file pre_processor.c
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 * \brief eNB scheduler preprocessing fuction prior to scheduling 
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 * \author Navid Nikaein and Ankit Bhamri
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 * \date 2013 - 2014
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 * \email navid.nikaein@eurecom.fr
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 * \version 1.0
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 * @ingroup _mac

 */

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

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

#include "LAYER2/MAC/defs.h"
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#include "LAYER2/MAC/proto.h"
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#include "LAYER2/MAC/extern.h"
#include "UTIL/LOG/log.h"
#include "UTIL/OPT/opt.h"
#include "OCG.h"
#include "OCG_extern.h"
#include "ARCH/CBMIMO1/DEVICE_DRIVER/extern.h"
#include "ARCH/CBMIMO1/DEVICE_DRIVER/defs.h"
#include "ARCH/CBMIMO1/DEVICE_DRIVER/from_grlib_softregs.h"

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


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#define DEBUG_eNB_SCHEDULER 1
#define DEBUG_HEADER_PARSING 1
//#define DEBUG_PACKET_TRACE 1

//#define ICIC 0

/*
  #ifndef USER_MODE
  #define msg debug_msg
  #endif
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 */
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extern inline unsigned int taus(void);



// This function stores the downlink buffer for all the logical channels 
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void store_dlsch_buffer (module_id_t Mod_id,
                         frame_t     frameP,
                         sub_frame_t subframeP){
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  module_id_t           next_ue;
  rnti_t                rnti;
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  uint16_t                   i=0;
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  mac_rlc_status_resp_t rlc_status;
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  unsigned char         UE_id,granted_UEs;
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  granted_UEs = find_dlgranted_UEs(Mod_id);

  for (UE_id=0;UE_id<granted_UEs;UE_id++){
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      eNB_mac_inst[Mod_id].UE_template[UE_id].dl_buffer_total = 0;
      eNB_mac_inst[Mod_id].UE_template[UE_id].dl_pdus_total = 0;
      for(i=0;i< MAX_NUM_LCID; i++) {
          eNB_mac_inst[Mod_id].UE_template[UE_id].dl_buffer_info[i]=0;
          eNB_mac_inst[Mod_id].UE_template[UE_id].dl_pdus_in_buffer[i]=0;
          eNB_mac_inst[Mod_id].UE_template[UE_id].dl_buffer_head_sdu_creation_time[i]=0;
          eNB_mac_inst[Mod_id].UE_template[UE_id].dl_buffer_head_sdu_remaining_size_to_send[i]=0;
      }
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  }

  for (UE_id=0;UE_id<granted_UEs;UE_id++) {
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      next_ue = UE_id;
      rnti = find_UE_RNTI(Mod_id,next_ue);
      if (rnti == 0)
        continue;

      for(i=0;i< MAX_NUM_LCID; i++){ // loop over all the logical channels

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          rlc_status = mac_rlc_status_ind(Mod_id,next_ue, frameP,ENB_FLAG_YES,MBMS_FLAG_NO,i,0 );
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          eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_info[i] = rlc_status.bytes_in_buffer; //storing the dlsch buffer for each logical channel
          eNB_mac_inst[Mod_id].UE_template[next_ue].dl_pdus_in_buffer[i] = rlc_status.pdus_in_buffer;
          eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_head_sdu_creation_time[i] = rlc_status.head_sdu_creation_time ;
          eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_head_sdu_remaining_size_to_send[i] = rlc_status.head_sdu_remaining_size_to_send;
          eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_head_sdu_is_segmented[i] = rlc_status.head_sdu_is_segmented;
          eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_total = eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_total + eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_info[i];//storing the total dlsch buffer
          eNB_mac_inst[Mod_id].UE_template[next_ue].dl_pdus_total += eNB_mac_inst[Mod_id].UE_template[next_ue].dl_pdus_in_buffer[i];
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#ifdef DEBUG_eNB_SCHEDULER
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          /* note for dl_buffer_head_sdu_remaining_size_to_send[i] :
           * 0 if head SDU has not been segmented (yet), else remaining size not already segmented and sent
           */
          if (eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_info[i]>0)
            LOG_D(MAC,"[eNB %d] Frame %d Subframe %d : RLC status for UE %d in LCID%d: total of %d pdus and %d size, head sdu queuing time %d, remaining size %d, is segmeneted %d \n",
                Mod_id, frameP, subframeP, next_ue,
                i, eNB_mac_inst[Mod_id].UE_template[next_ue].dl_pdus_in_buffer[i],eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_info[i],
                eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_head_sdu_creation_time[i],
                eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_head_sdu_remaining_size_to_send[i],
                eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_head_sdu_is_segmented[i]
            );
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#endif

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      }
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#ifdef DEBUG_eNB_SCHEDULER
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      if ( eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_total>0)
        LOG_D(MAC,"[eNB %d] Frame %d Subframe %d : RLC status for UE %d : total DL buffer size %d and total number of pdu %d \n",
            Mod_id, frameP, subframeP, next_ue,
            eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_total,
            eNB_mac_inst[Mod_id].UE_template[next_ue].dl_pdus_total
        );
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#endif   
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  }
}


// This function returns the estimated number of RBs required by each UE for downlink scheduling
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void assign_rbs_required (module_id_t      Mod_id,
    frame_t     frameP,
    sub_frame_t subframe,
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    uint16_t *nb_rbs_required){
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  module_id_t            next_ue;
  rnti_t            rnti;
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  uint16_t               TBS = 0;
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  LTE_eNB_UE_stats *eNB_UE_stats = NULL;
  module_id_t            ue_inst;
  unsigned char granted_UEs;
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  granted_UEs = find_dlgranted_UEs(Mod_id);

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  for (ue_inst=0;ue_inst<granted_UEs;ue_inst++){
      nb_rbs_required[ue_inst] = 0; //initialization
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  }



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  for (ue_inst=0;ue_inst<granted_UEs;ue_inst++) {

      next_ue = ue_inst;
      rnti = find_UE_RNTI(Mod_id,next_ue);
      if (rnti == 0)
        continue;

      eNB_UE_stats = mac_xface->get_eNB_UE_stats(Mod_id,rnti);
      //if(eNB_UE_stats == NULL)
      //continue;


      switch(eNB_UE_stats->DL_cqi[0])
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      {
      case 0:
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        eNB_UE_stats->dlsch_mcs1 = 0;
        break;
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      case 1:
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        eNB_UE_stats->dlsch_mcs1 = 0;
        break;
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      case 2:
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        eNB_UE_stats->dlsch_mcs1 = 0;
        break;
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      case 3:
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        eNB_UE_stats->dlsch_mcs1 = 2;
        break;
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      case 4:
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        eNB_UE_stats->dlsch_mcs1 = 4;
        break;
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      case 5:
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        eNB_UE_stats->dlsch_mcs1 = 6;
        break;
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      case 6:
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        eNB_UE_stats->dlsch_mcs1 = 8;
        break;
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      case 7:
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        eNB_UE_stats->dlsch_mcs1 = 11;
        break;
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      case 8:
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        eNB_UE_stats->dlsch_mcs1 = 13;
        break;
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      case 9:
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        eNB_UE_stats->dlsch_mcs1 = 16;
        break;
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      case 10:
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        eNB_UE_stats->dlsch_mcs1 = 18;
        break;
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      case 11:
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        eNB_UE_stats->dlsch_mcs1 = 20;
        break;
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      case 12:
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        eNB_UE_stats->dlsch_mcs1 = 22;
        break;
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      case 13:
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        eNB_UE_stats->dlsch_mcs1 = 22;//25
        break;
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      case 14:
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        eNB_UE_stats->dlsch_mcs1 = 22;//27
        break;
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      case 15:
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        eNB_UE_stats->dlsch_mcs1 = 22;//28
        break;
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      default:
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        printf("Invalid CQI");
        exit(-1);
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      }
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      if ((mac_get_rrc_status(Mod_id,1,next_ue) < RRC_RECONFIGURED)){
          nb_rbs_required[next_ue] = mac_xface->lte_frame_parms->N_RB_DL;
          continue;
      }


      if (eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_total> 0) {

          if (eNB_UE_stats->dlsch_mcs1==0) nb_rbs_required[next_ue] = 4;  // don't let the TBS get too small
          else nb_rbs_required[next_ue] = 2;

          TBS = mac_xface->get_TBS_DL(eNB_UE_stats->dlsch_mcs1,nb_rbs_required[next_ue]);

          while (TBS < eNB_mac_inst[Mod_id].UE_template[next_ue].dl_buffer_total)  {
              nb_rbs_required[next_ue] += 2;
              if (nb_rbs_required[next_ue]>mac_xface->lte_frame_parms->N_RB_DL) {
                  TBS = mac_xface->get_TBS_DL(eNB_UE_stats->dlsch_mcs1,mac_xface->lte_frame_parms->N_RB_DL);
                  nb_rbs_required[next_ue] = mac_xface->lte_frame_parms->N_RB_DL;// calculating required number of RBs for each UE
                  break;
              }
              TBS = mac_xface->get_TBS_DL(eNB_UE_stats->dlsch_mcs1,nb_rbs_required[next_ue]);
          }

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      }
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  }
}



// This fuction sorts the UE in order their dlsch buffer and CQI
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void sort_UEs (module_id_t      Mod_id,
    sub_frame_t subframe,
    module_id_t        *UE_id_sorted){

  module_id_t            next_ue1,next_ue2;
  unsigned char     round1=0,round2=0,harq_pid1=0,harq_pid2=0;
  module_id_t            ue_inst;
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  uint16_t               granted_UEs,i=0,ii=0,j=0;
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  rnti_t            rnti1,rnti2;
  LTE_eNB_UE_stats *eNB_UE_stats1 = NULL;
  LTE_eNB_UE_stats *eNB_UE_stats2 = NULL;


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  granted_UEs = find_dlgranted_UEs(Mod_id);
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  for (ue_inst=0;ue_inst<granted_UEs;ue_inst++) {
      UE_id_sorted[i] = ue_inst;
      i++;
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  }
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  for(i=0; i < granted_UEs;i++){
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      next_ue1 = UE_id_sorted[i];

      rnti1 = find_UE_RNTI(Mod_id,next_ue1);
      if(rnti1 == 0)
        continue;


      eNB_UE_stats1 = mac_xface->get_eNB_UE_stats(Mod_id,rnti1);

      mac_xface->get_ue_active_harq_pid(Mod_id,rnti1,subframe,&harq_pid1,&round1,0);


      for(ii=i+1;ii<granted_UEs;ii++){

          next_ue2 = UE_id_sorted[ii];

          rnti2 = find_UE_RNTI(Mod_id,next_ue2);
          if(rnti2 == 0)
            continue;

          eNB_UE_stats2 = mac_xface->get_eNB_UE_stats(Mod_id,rnti2);

          mac_xface->get_ue_active_harq_pid(Mod_id,rnti2,subframe,&harq_pid2,&round2,0);

          if(round2 > round1){
              UE_id_sorted[i] = next_ue2;
              UE_id_sorted[ii] = next_ue1;
          }
          else if (round2 == round1){
              for(j=0;j<MAX_NUM_LCID;j++){

                  if(eNB_mac_inst[Mod_id].UE_template[next_ue1].dl_buffer_info[j] < eNB_mac_inst[Mod_id].UE_template[next_ue2].dl_buffer_info[j]){
                      UE_id_sorted[i] = next_ue2;
                      UE_id_sorted[ii] = next_ue1;
                      break;
                  }
                  else if((j == MAX_NUM_LCID-1))
                    {
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												/* The goal is to sort by priority.
												* We use the priority of DTCH logical
												* channel.
												*/
												/*if(eNB_mac_inst[Mod_id].UE_sched_ctrl[next_ue1].priority[3]<eNB_mac_inst[Mod_id].UE_sched_ctrl[next_ue2].priority[3])
												{
													UE_id_sorted[i] = next_ue2;
                          UE_id_sorted[ii] = next_ue1;
												} //if the priority is the same then sort by CQI
												else if(eNB_mac_inst[Mod_id].UE_sched_ctrl[next_ue1].priority[3]==eNB_mac_inst[Mod_id].UE_sched_ctrl[next_ue2].priority[3]){*/                     

												if(eNB_UE_stats1->DL_cqi[0] < eNB_UE_stats2->DL_cqi[0]){
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                          UE_id_sorted[i] = next_ue2;
                          UE_id_sorted[ii] = next_ue1;
                      }
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										//}
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                    }
              }
          }
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      }
  }
}

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// This function assigns pre-available RBS to each UE in specified sub-bands before scheduling is done
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void dlsch_scheduler_pre_processor (module_id_t        Mod_id,
    frame_t       frameP,
    sub_frame_t   subframeP,
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    uint8_t           *dl_pow_off,
    uint16_t          *pre_nb_available_rbs,
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    int           N_RBGS,
    unsigned char rballoc_sub_UE[NUMBER_OF_UE_MAX][N_RBGS_MAX]){
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  unsigned char next_ue,next_ue1,next_ue2,rballoc_sub[mac_xface->lte_frame_parms->N_RBGS],harq_pid=0,harq_pid1=0,harq_pid2=0,round=0,round1=0,round2=0,total_ue_count=0;
  unsigned char MIMO_mode_indicator[mac_xface->lte_frame_parms->N_RBGS];
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  module_id_t             UE_id, i;
  module_id_t             UE_id_sorted[NUMBER_OF_UE_MAX];
  module_id_t             granted_UEs;
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  uint16_t                ii,j;
  uint16_t                nb_rbs_required[NUMBER_OF_UE_MAX];
  uint16_t                nb_rbs_required_remaining[NUMBER_OF_UE_MAX];
  uint16_t                nb_rbs_required_remaining_1[NUMBER_OF_UE_MAX];
  uint16_t                i1,i2,i3,r1=0;
  uint16_t                average_rbs_per_user=0;
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  rnti_t             rnti,rnti1,rnti2;
  LTE_eNB_UE_stats  *eNB_UE_stats1 = NULL;
  LTE_eNB_UE_stats  *eNB_UE_stats2 = NULL;
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  uint16_t                min_rb_unit;
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  switch (mac_xface->lte_frame_parms->N_RB_DL) {
  case 6:
    min_rb_unit=1;
    break;
  case 25:
    min_rb_unit=2;
    break;
  case 50:
    min_rb_unit=3;
    break;
  case 100:
    min_rb_unit=4;
    break;
  default:
    min_rb_unit=2;
    break;
  }
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  granted_UEs = find_dlgranted_UEs(Mod_id);


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  for(i=0;i<NUMBER_OF_UE_MAX;i++){
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      nb_rbs_required[i] = 0;
      UE_id_sorted[i] = i;
      dl_pow_off[i]  =2;
      pre_nb_available_rbs[i] = 0;
      nb_rbs_required_remaining[i] = 0;
      for(j=0;j<N_RBGS;j++)
        {
          MIMO_mode_indicator[j] = 2;
          rballoc_sub[j] = 0;
          rballoc_sub_UE[i][j] = 0;
        }
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  }
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  //printf("SUCCESS %d",mac_xface->lte_frame_parms->N_RBGS);
  //exit(-1);
  // Store the DLSCH buffer for each logical channel
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  store_dlsch_buffer (Mod_id,frameP,subframeP);
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  // Calculate the number of RBs required by each UE on the basis of logical channel's buffer
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  assign_rbs_required (Mod_id,frameP,subframeP,nb_rbs_required);
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  // Sorts the user on the basis of dlsch logical channel buffer and CQI
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  sort_UEs (Mod_id,subframeP,UE_id_sorted);
  //printf ("Frame:%d,SUCCESS %d[%d] %d[%d]\n",frameP,UE_id_sorted[0],nb_rbs_required[UE_id_sorted[0]],UE_id_sorted[1],nb_rbs_required[UE_id_sorted[1]]);

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  for (i=0;i<granted_UEs;i++){
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      rnti = find_UE_RNTI(Mod_id,i);
      if(rnti == 0)
        continue;
      mac_xface->get_ue_active_harq_pid(Mod_id,rnti,subframeP,&harq_pid,&round,0);
      if(round>0)
        nb_rbs_required[i] = eNB_mac_inst[Mod_id].UE_template[i].nb_rb[harq_pid];
      //nb_rbs_required_remaining[i] = nb_rbs_required[i];
      if(nb_rbs_required[i] > 0)
        total_ue_count = total_ue_count + 1;
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  }
  // hypotetical assignement
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	/*
	* If schedule is enabled and if the priority of the UEs is modified
	* The average rbs per logical channel per user will depend on the level of  
	* priority. Concerning the hypothetical assignement, we should assign more 
	* rbs to prioritized users. Maybe, we can do a mapping between the
	* average rbs per user and the level of priority or multiply the average rbs 
	* per user by a coefficient which represents the degree of priority.
	*/
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  if((total_ue_count > 0) && ( min_rb_unit * total_ue_count <= mac_xface->lte_frame_parms->N_RB_DL ) )
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    average_rbs_per_user = (uint16_t) ceil(mac_xface->lte_frame_parms->N_RB_DL/total_ue_count);
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  else 
    average_rbs_per_user = min_rb_unit;

  for(i=0;i<granted_UEs;i++){
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      // control channel
      if (mac_get_rrc_status(Mod_id,1,i) < RRC_RECONFIGURED)
        nb_rbs_required_remaining_1[i] = nb_rbs_required[i];
      else
        nb_rbs_required_remaining_1[i] = cmin(average_rbs_per_user,nb_rbs_required[i]);
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  }
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  //Allocation to UEs is done in 2 rounds,
  // 1st round: average number of RBs allocated to each UE
  // 2nd round: remaining RBs are allocated to high priority UEs
  for(r1=0;r1<2;r1++){ 

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      for(i=0; i<granted_UEs;i++)
        {
          if(r1 == 0)
            nb_rbs_required_remaining[i] = nb_rbs_required_remaining_1[i];
          else  // rb required based only on the buffer - rb allloctaed in the 1st round + extra reaming rb form the 1st round
            nb_rbs_required_remaining[i] = nb_rbs_required[i]-nb_rbs_required_remaining_1[i]+nb_rbs_required_remaining[i];
        }
      // retransmission in control channels
      for (i = 0 ;i<granted_UEs; i++){

          next_ue = UE_id_sorted[i];
          rnti = find_UE_RNTI(Mod_id,next_ue);
          if(rnti == 0)
            continue;
          mac_xface->get_ue_active_harq_pid(Mod_id,rnti,subframeP,&harq_pid,&round,0);

          if ((mac_get_rrc_status(Mod_id,1,next_ue) < RRC_RECONFIGURED) && (round >0)) {



              for(j=0;j<N_RBGS;j++){

                  if((rballoc_sub[j] == 0) && (rballoc_sub_UE[next_ue][j] == 0) && (nb_rbs_required_remaining[next_ue]>0)){

                      rballoc_sub[j] = 1;
                      rballoc_sub_UE[next_ue][j] = 1;

                      MIMO_mode_indicator[j] = 1;

                      if(mac_xface->get_transmission_mode(Mod_id,rnti)==5)
                        dl_pow_off[next_ue] = 1;
                      // if the total rb is odd
                      if ((j == N_RBGS-1) &&
                          ((mac_xface->lte_frame_parms->N_RB_DL == 25)||
                              (mac_xface->lte_frame_parms->N_RB_DL == 50))) {
                          nb_rbs_required_remaining[next_ue] = nb_rbs_required_remaining[next_ue] - min_rb_unit+1;
                          pre_nb_available_rbs[next_ue] = pre_nb_available_rbs[next_ue] + min_rb_unit - 1;
                      }
                      else {
                          nb_rbs_required_remaining[next_ue] = nb_rbs_required_remaining[next_ue] - min_rb_unit;
                          pre_nb_available_rbs[next_ue] = pre_nb_available_rbs[next_ue] + min_rb_unit;
                      }
                  }
              }
          }
512 513 514 515
      }



516 517 518 519 520 521 522 523 524 525
      // retransmission in data channels
      for (i = 0 ;i<granted_UEs; i++){

          next_ue = UE_id_sorted[i];
          rnti = find_UE_RNTI(Mod_id,next_ue);
          if(rnti == 0)
            continue;
          mac_xface->get_ue_active_harq_pid(Mod_id,rnti,subframeP,&harq_pid,&round,0);

          if ((mac_get_rrc_status(Mod_id,1,next_ue) >= RRC_RECONFIGURED) && (round > 0)) {
526 527 528



529
              for(j=0;j<N_RBGS;j++){
530

531
                  if((rballoc_sub[j] == 0) && (rballoc_sub_UE[next_ue][j] == 0) && (nb_rbs_required_remaining[next_ue]>0)){
532

533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553
                      rballoc_sub[j] = 1;
                      rballoc_sub_UE[next_ue][j] = 1;

                      MIMO_mode_indicator[j] = 1;

                      if(mac_xface->get_transmission_mode(Mod_id,rnti)==5)
                        dl_pow_off[next_ue] = 1;

                      if((j == N_RBGS-1) &&
                          ((mac_xface->lte_frame_parms->N_RB_DL == 25)||
                              (mac_xface->lte_frame_parms->N_RB_DL == 50))){
                          nb_rbs_required_remaining[next_ue] = nb_rbs_required_remaining[next_ue] - min_rb_unit + 1;
                          pre_nb_available_rbs[next_ue] = pre_nb_available_rbs[next_ue] + min_rb_unit - 1;
                      }
                      else {
                          nb_rbs_required_remaining[next_ue] = nb_rbs_required_remaining[next_ue] - min_rb_unit;
                          pre_nb_available_rbs[next_ue] = pre_nb_available_rbs[next_ue] + min_rb_unit;
                      }
                  }
              }
          }
554 555 556
      }


557 558
      // control channel in the 1st transmission
      for (i = 0 ;i<granted_UEs; i++){
559

560 561 562 563 564 565 566
          next_ue = UE_id_sorted[i];
          rnti = find_UE_RNTI(Mod_id,next_ue);
          if(rnti == 0)
            continue;
          mac_xface->get_ue_active_harq_pid(Mod_id,rnti,subframeP,&harq_pid,&round,0);

          if ((mac_get_rrc_status(Mod_id,1,next_ue) < RRC_RECONFIGURED) && (round == 0)) {
567 568 569 570




571
              for(j=0;j<N_RBGS;j++){
572

573
                  if((rballoc_sub[j] == 0) && (rballoc_sub_UE[next_ue][j] == 0) && (nb_rbs_required_remaining[next_ue]>0)){
574

575 576
                      rballoc_sub[j] = 1;
                      rballoc_sub_UE[next_ue][j] = 1;
577

578
                      MIMO_mode_indicator[j] = 1;
579

580 581
                      if(mac_xface->get_transmission_mode(Mod_id,rnti)==5)
                        dl_pow_off[next_ue] = 1;
582

583 584 585 586 587 588 589 590 591 592 593 594 595
                      if((j == N_RBGS-1) &&
                          ((mac_xface->lte_frame_parms->N_RB_DL == 25)||
                              (mac_xface->lte_frame_parms->N_RB_DL == 50))){
                          nb_rbs_required_remaining[next_ue] = nb_rbs_required_remaining[next_ue] - min_rb_unit + 1;
                          pre_nb_available_rbs[next_ue] = pre_nb_available_rbs[next_ue] + min_rb_unit - 1;
                      }
                      else {
                          nb_rbs_required_remaining[next_ue] = nb_rbs_required_remaining[next_ue] - min_rb_unit;
                          pre_nb_available_rbs[next_ue] = pre_nb_available_rbs[next_ue] + min_rb_unit;
                      }
                  }
              }
          }
596 597 598 599
      }



600 601
      // data chanel TM5
      for (i = 0 ;i<granted_UEs; i++){
602 603


604 605 606 607
          next_ue1 = UE_id_sorted[i];
          rnti1 = find_UE_RNTI(Mod_id,next_ue1);
          if(rnti1 == 0)
            continue;
608

609
          eNB_UE_stats1 = mac_xface->get_eNB_UE_stats(Mod_id,rnti1);
610

611
          mac_xface->get_ue_active_harq_pid(Mod_id,rnti1,subframeP,&harq_pid1,&round1,0);
612

613
          if ((mac_get_rrc_status(Mod_id,1,next_ue1) >= RRC_RECONFIGURED) && (round1==0) && (mac_xface->get_transmission_mode(Mod_id,rnti1)==5) && (dl_pow_off[next_ue1] != 1)) {
614 615


616
              for(j=0;j<N_RBGS;j+=2){
617

618
                  if((((j == (N_RBGS-1))&& (rballoc_sub[j] == 0) && (rballoc_sub_UE[next_ue1][j] == 0)) || ((j < (N_RBGS-1)) && (rballoc_sub[j+1] == 0) && (rballoc_sub_UE[next_ue1][j+1] == 0))) && (nb_rbs_required_remaining[next_ue1]>0)){
619

620
                      for (ii = i+1;ii < granted_UEs;ii++) {
621

622 623 624 625
                          next_ue2 = UE_id_sorted[ii];
                          rnti2 = find_UE_RNTI(Mod_id,next_ue2);
                          if(rnti2 == 0)
                            continue;
626

627 628
                          eNB_UE_stats2 = mac_xface->get_eNB_UE_stats(Mod_id,rnti2);
                          mac_xface->get_ue_active_harq_pid(Mod_id,rnti2,subframeP,&harq_pid2,&round2,0);
629

630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649
                          if ((mac_get_rrc_status(Mod_id,1,next_ue2) >= RRC_RECONFIGURED) && (round2==0) && (mac_xface->get_transmission_mode(Mod_id,rnti2)==5) && (dl_pow_off[next_ue2] != 1)) {

                              if((((j == (N_RBGS-1)) && (rballoc_sub_UE[next_ue2][j] == 0)) || ((j < (N_RBGS-1)) && (rballoc_sub_UE[next_ue2][j+1] == 0))) && (nb_rbs_required_remaining[next_ue2]>0)){

                                  if((((eNB_UE_stats2->DL_pmi_single^eNB_UE_stats1->DL_pmi_single)<<(14-j))&0xc000)== 0x4000){ //MU-MIMO only for 25 RBs configuration

                                      rballoc_sub[j] = 1;
                                      rballoc_sub_UE[next_ue1][j] = 1;
                                      rballoc_sub_UE[next_ue2][j] = 1;
                                      MIMO_mode_indicator[j] = 0;

                                      if (j< N_RBGS-1) {
                                          rballoc_sub[j+1] = 1;
                                          rballoc_sub_UE[next_ue1][j+1] = 1;
                                          rballoc_sub_UE[next_ue2][j+1] = 1;
                                          MIMO_mode_indicator[j+1] = 0;
                                      }

                                      dl_pow_off[next_ue1] = 0;
                                      dl_pow_off[next_ue2] = 0;
650

651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675



                                      if ((j == N_RBGS-1) &&
                                          ((mac_xface->lte_frame_parms->N_RB_DL == 25) ||
                                              (mac_xface->lte_frame_parms->N_RB_DL == 50))){
                                          nb_rbs_required_remaining[next_ue1] = nb_rbs_required_remaining[next_ue1] - min_rb_unit+1;
                                          pre_nb_available_rbs[next_ue1] = pre_nb_available_rbs[next_ue1] + min_rb_unit-1;
                                          nb_rbs_required_remaining[next_ue2] = nb_rbs_required_remaining[next_ue2] - min_rb_unit+1;
                                          pre_nb_available_rbs[next_ue2] = pre_nb_available_rbs[next_ue2] + min_rb_unit-1;
                                      }
                                      else {
                                          nb_rbs_required_remaining[next_ue1] = nb_rbs_required_remaining[next_ue1] - 4;
                                          pre_nb_available_rbs[next_ue1] = pre_nb_available_rbs[next_ue1] + 4;
                                          nb_rbs_required_remaining[next_ue2] = nb_rbs_required_remaining[next_ue2] - 4;
                                          pre_nb_available_rbs[next_ue2] = pre_nb_available_rbs[next_ue2] + 4;
                                      }
                                      break;
                                  }
                              }
                          }
                      }
                  }
              }
          }
676
      }
677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744
      // data channel for all TM
      for (i = 0;i<granted_UEs; i++){

          next_ue = UE_id_sorted[i];
          rnti = find_UE_RNTI(Mod_id,next_ue);
          if (rnti == 0)
            continue;

          mac_xface->get_ue_active_harq_pid(Mod_id,rnti,subframeP,&harq_pid,&round,0);

          if ((mac_get_rrc_status(Mod_id,1,next_ue) >= RRC_RECONFIGURED) && (round==0)) {


              for(j=0;j<N_RBGS;j++){

                  if((rballoc_sub[j] == 0) && (rballoc_sub_UE[next_ue][j] == 0) && (nb_rbs_required_remaining[next_ue]>0)){


                      switch (mac_xface->get_transmission_mode(Mod_id,rnti)) {
                      case 1:
                      case 2:
                      case 4:
                      case 6:
                        rballoc_sub[j] = 1;
                        rballoc_sub_UE[next_ue][j] = 1;

                        MIMO_mode_indicator[j] = 1;

                        if((j == N_RBGS-1) &&
                            ((mac_xface->lte_frame_parms->N_RB_DL == 25)||
                                (mac_xface->lte_frame_parms->N_RB_DL == 50))){
                            nb_rbs_required_remaining[next_ue] = nb_rbs_required_remaining[next_ue] - min_rb_unit+1;
                            pre_nb_available_rbs[next_ue] = pre_nb_available_rbs[next_ue] +min_rb_unit-1;
                        }
                        else {
                            nb_rbs_required_remaining[next_ue] = nb_rbs_required_remaining[next_ue] - min_rb_unit;
                            pre_nb_available_rbs[next_ue] = pre_nb_available_rbs[next_ue] + min_rb_unit;
                        }

                        break;
                      case 5:
                        if (dl_pow_off[next_ue] != 0){

                            dl_pow_off[next_ue] = 1;

                            rballoc_sub[j] = 1;
                            rballoc_sub_UE[next_ue][j] = 1;

                            MIMO_mode_indicator[j] = 1;

                            if((j == N_RBGS-1) &&
                                ((mac_xface->lte_frame_parms->N_RB_DL == 25)||
                                    (mac_xface->lte_frame_parms->N_RB_DL == 50))){
                                nb_rbs_required_remaining[next_ue] = nb_rbs_required_remaining[next_ue] - min_rb_unit+1;
                                pre_nb_available_rbs[next_ue] = pre_nb_available_rbs[next_ue] + min_rb_unit-1;
                            }
                            else {
                                nb_rbs_required_remaining[next_ue] = nb_rbs_required_remaining[next_ue] - min_rb_unit;
                                pre_nb_available_rbs[next_ue] = pre_nb_available_rbs[next_ue] + min_rb_unit;
                            }
                        }
                        break;
                      default:
                        break;
                      }
                  }
              }
          }
745 746
      }
  }
747

748 749 750
  i1=0;
  i2=0;
  i3=0;
751
  for (j=0;j<N_RBGS;j++){
752 753 754 755 756 757
      if(MIMO_mode_indicator[j] == 2)
        i1 = i1+1;
      else if(MIMO_mode_indicator[j] == 1)
        i2 = i2+1;
      else if(MIMO_mode_indicator[j] == 0)
        i3 = i3+1;
758 759 760
  }


761
  if((i1 < N_RBGS) && (i2>0) && (i3==0))
762
    PHY_vars_eNB_g[Mod_id]->check_for_SUMIMO_transmissions = PHY_vars_eNB_g[Mod_id]->check_for_SUMIMO_transmissions + 1;
763

764
  if(i3 == N_RBGS && i1==0 && i2==0)
765 766
    PHY_vars_eNB_g[Mod_id]->FULL_MUMIMO_transmissions = PHY_vars_eNB_g[Mod_id]->FULL_MUMIMO_transmissions + 1;

767
  if((i1 < N_RBGS) && (i3 > 0))
768 769 770
    PHY_vars_eNB_g[Mod_id]->check_for_MUMIMO_transmissions = PHY_vars_eNB_g[Mod_id]->check_for_MUMIMO_transmissions + 1;

  PHY_vars_eNB_g[Mod_id]->check_for_total_transmissions = PHY_vars_eNB_g[Mod_id]->check_for_total_transmissions + 1;
771 772 773 774




775
  for(UE_id=0;UE_id<granted_UEs;UE_id++){
776
      //PHY_vars_eNB_g[Mod_id]->mu_mimo_mode[UE_id].dl_pow_off = dl_pow_off[UE_id];
777 778 779
      LOG_D(MAC,"******************Scheduling Information for UE%d ************************\n",UE_id);
      LOG_D(MAC,"dl power offset UE%d = %d \n",UE_id,dl_pow_off[UE_id]);
      LOG_D(MAC,"***********RB Alloc for every subband for UE%d ***********\n",UE_id);
780 781
      for(j=0;j<N_RBGS;j++){
          //PHY_vars_eNB_g[Mod_id]->mu_mimo_mode[UE_id].rballoc_sub[i] = rballoc_sub_UE[UE_id][i];
782
          LOG_D(MAC,"RB Alloc for UE%d and Subband%d = %d\n",UE_id,j,rballoc_sub_UE[UE_id][j]);
783 784
      }
      //PHY_vars_eNB_g[Mod_id]->mu_mimo_mode[UE_id].pre_nb_available_rbs = pre_nb_available_rbs[UE_id];
785
      LOG_D(MAC,"Total RBs allocated for UE%d = %d\n",UE_id,pre_nb_available_rbs[UE_id]);
786 787 788
  }
}