eNB_scheduler_dlsch.c 107 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
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    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

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  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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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"

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

#define ENABLE_MAC_PAYLOAD_DEBUG
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//#define DEBUG_eNB_SCHEDULER 1
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extern inline unsigned int taus(void);

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//------------------------------------------------------------------------------
void
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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  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
schedule_next_dlue(
  module_id_t module_idP,
  int CC_id,
  sub_frame_t subframeP
)
//------------------------------------------------------------------------------
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{
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  int next_ue;
  UE_list_t *UE_list=&eNB_mac_inst[module_idP].UE_list;
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  for (next_ue=UE_list->head; next_ue>=0; next_ue=UE_list->next[next_ue] ) {
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    if  (eNB_dlsch_info[module_idP][CC_id][next_ue].status == S_DL_WAITING) {
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      return next_ue;
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    }
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  }
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  for (next_ue=UE_list->head; next_ue>=0; next_ue=UE_list->next[next_ue] ) {
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    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
generate_dlsch_header(
                      unsigned char* mac_header,
                      unsigned char num_sdus,
                      unsigned short *sdu_lengths,
                      unsigned char *sdu_lcids,
                      unsigned char drx_cmd,
                      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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  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)) {
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    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) {
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    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) {
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    if (first_element>0) {
      mac_header_ptr->E = 1;
      mac_header_ptr++;
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    } else {
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      first_element=1;
    }
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    mac_header_ptr->R = 0;
    mac_header_ptr->E    = 0;
    mac_header_ptr->LCID = DRX_CMD;
    last_size=1;
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  }

  if (timing_advance_cmd != 0) {
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    if (first_element>0) {
      mac_header_ptr->E = 1;
      mac_header_ptr++;
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    } else {
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      first_element=1;
    }
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    mac_header_ptr->R = 0;
    mac_header_ptr->E    = 0;
    mac_header_ptr->LCID = TIMING_ADV_CMD;
    last_size=1;
    //    msg("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
    ((TIMING_ADVANCE_CMD *)ce_ptr)->R=0;
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    ((TIMING_ADVANCE_CMD *)ce_ptr)->TA=(timing_advance_cmd+31)&0x3f;
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    LOG_D(MAC,"timing advance =%d (%d)\n",timing_advance_cmd,((TIMING_ADVANCE_CMD *)ce_ptr)->TA);
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    ce_ptr+=sizeof(TIMING_ADVANCE_CMD);
    //msg("offset %d\n",ce_ptr-mac_header_control_elements);
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  }

  if (ue_cont_res_id) {
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    if (first_element>0) {
      mac_header_ptr->E = 1;
      /*
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      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);
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      */
      mac_header_ptr++;
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    } else {
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      first_element=1;
    }
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    mac_header_ptr->R = 0;
    mac_header_ptr->E    = 0;
    mac_header_ptr->LCID = UE_CONT_RES;
    last_size=1;
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    LOG_T(MAC,"[eNB ][RAPROC] Generate contention resolution msg: %x.%x.%x.%x.%x.%x\n",
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          ue_cont_res_id[0],
          ue_cont_res_id[1],
          ue_cont_res_id[2],
          ue_cont_res_id[3],
          ue_cont_res_id[4],
          ue_cont_res_id[5]);

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

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

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  for (i=0; i<num_sdus; i++) {
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    LOG_T(MAC,"[eNB] Generate DLSCH header num sdu %d len sdu %d\n",num_sdus, sdu_lengths[i]);
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    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,
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      ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
      ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
      ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
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      */
      mac_header_ptr+=last_size;
      //msg("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
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    } else {
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      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;
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    } else {
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      ((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",
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            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));
    }
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  */
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  if (post_padding>0) {// we have lots of padding at the end of the packet
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    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++;
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  } else { // no end of packet padding
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    // last SDU subhead is of fixed type (sdu length implicitly to be computed at UE)
    mac_header_ptr++;
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  }

  //msg("After subheaders %d\n",(uint8_t*)mac_header_ptr - mac_header);

  if ((ce_ptr-mac_header_control_elements) > 0) {
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    // 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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//------------------------------------------------------------------------------
void
set_ul_DAI(
  int module_idP,
  int UE_idP,
  int CC_idP,
  int frameP,
  int subframeP,
  LTE_DL_FRAME_PARMS*  frame_parms[MAX_NUM_CCs]
)
//------------------------------------------------------------------------------
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{

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  eNB_MAC_INST         *eNB      = &eNB_mac_inst[module_idP];
  UE_list_t            *UE_list  = &eNB->UE_list;
  unsigned char         DAI;
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  if (frame_parms[CC_idP]->frame_type == TDD) {
    DAI = (UE_list->UE_template[CC_idP][UE_idP].DAI-1)&3;
    LOG_D(MAC,"[eNB %d] Frame %d, subframe %d: DAI %d for UE %d\n",module_idP,frameP,subframeP,DAI,UE_idP);
    // Save DAI for Format 0 DCI
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    switch (frame_parms[CC_idP]->tdd_config) {
    case 0:
      //      if ((subframeP==0)||(subframeP==1)||(subframeP==5)||(subframeP==6))
      break;
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    case 1:
      switch (subframeP) {
      case 1:
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        UE_list->UE_template[CC_idP][UE_idP].DAI_ul[7] = DAI;
        break;

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

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

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

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

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

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

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//------------------------------------------------------------------------------
void
schedule_ue_spec(
                module_id_t   module_idP,
                frame_t       frameP,
                sub_frame_t   subframeP,
                unsigned int  *nb_rb_used0,
                unsigned int  *nCCE_used,
                int*           mbsfn_flag
)
//------------------------------------------------------------------------------
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{
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  uint8_t               CC_id;
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  int                   UE_id;
  uint16_t              nCCE[MAX_NUM_CCs];
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  int                   N_RBG[MAX_NUM_CCs];
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  unsigned char         aggregation;
  mac_rlc_status_resp_t rlc_status;
  unsigned char         header_len_dcch=0, header_len_dcch_tmp=0,header_len_dtch=0,header_len_dtch_tmp=0, ta_len=0;
  unsigned char         sdu_lcids[11],offset,num_sdus=0;
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  uint16_t              nb_rb,nb_rb_temp,total_nb_available_rb[MAX_NUM_CCs],nb_available_rb;
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  uint16_t              TBS,j,sdu_lengths[11],rnti,padding=0,post_padding=0;
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  unsigned char         dlsch_buffer[MAX_DLSCH_PAYLOAD_BYTES];
  unsigned char         round            = 0;
  unsigned char         harq_pid         = 0;
  void                 *DLSCH_dci        = NULL;
  LTE_eNB_UE_stats     *eNB_UE_stats     = NULL;
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  uint16_t              sdu_length_total = 0;
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  unsigned char         DAI;
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  int                   i                = 0;
  uint8_t               dl_pow_off[MAX_NUM_CCs][NUMBER_OF_UE_MAX];
  unsigned char         rballoc_sub_UE[MAX_NUM_CCs][NUMBER_OF_UE_MAX][N_RBG_MAX];
  uint16_t              pre_nb_available_rbs[MAX_NUM_CCs][NUMBER_OF_UE_MAX];
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  int                   mcs;
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  uint16_t              min_rb_unit[MAX_NUM_CCs];
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  short                 ta_update        = 0;
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  eNB_MAC_INST         *eNB      = &eNB_mac_inst[module_idP];
  UE_list_t            *UE_list  = &eNB->UE_list;
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  LTE_DL_FRAME_PARMS   *frame_parms[MAX_NUM_CCs];
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  int                   continue_flag=0;

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  if (UE_list->head==-1) {
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    return;
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  }
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  start_meas(&eNB->schedule_dlsch);
  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_SCHEDULE_DLSCH,VCD_FUNCTION_IN);
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  //weight = get_ue_weight(module_idP,UE_id);
  aggregation = 1; // set to the maximum aggregation level

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  for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
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    min_rb_unit[CC_id]=get_min_rb_unit(module_idP,CC_id);
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    frame_parms[CC_id] = mac_xface->get_lte_frame_parms(module_idP,CC_id);
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    total_nb_available_rb[CC_id] = frame_parms[CC_id]->N_RB_DL - nb_rb_used0[CC_id];
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    nCCE[CC_id] = mac_xface->get_nCCE_max(module_idP,CC_id) - nCCE_used[CC_id];
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    N_RBG[CC_id] = frame_parms[CC_id]->N_RBG;

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    // store the global enb stats:
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    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].available_ncces = nCCE[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,
                                dl_pow_off,
                                pre_nb_available_rbs,
                                N_RBG,
                                rballoc_sub_UE,
                                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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  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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    if (mbsfn_flag[CC_id]>0)
      continue;
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    for (UE_id=UE_list->head; UE_id>=0; UE_id=UE_list->next[UE_id]) {
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      rnti = UE_RNTI(module_idP,UE_id);
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      eNB_UE_stats = mac_xface->get_eNB_UE_stats(module_idP,CC_id,rnti);
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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);
        // mac_xface->macphy_exit("Cannot find rnti for UE_id");
        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");
        //  mac_xface->macphy_exit("[MAC][eNB] Cannot find eNB_UE_stats\n");
        continue_flag=1;
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      }
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      if ((pre_nb_available_rbs[CC_id][UE_id] == 0) || (nCCE[CC_id] < (1<<aggregation))) {
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        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, nb_rb_used0[CC_id], pre_nb_available_rbs[CC_id][UE_id], nCCE[CC_id], aggregation);
        //if(mac_xface->get_transmission_mode(module_idP,rnti)==5)
        continue_flag=1; //to next user (there might be rbs availiable for other UEs in TM5
        // else
        //  break;
532
      }
533

534
      if (frame_parms[CC_id]->frame_type == TDD)  {
535 536 537 538 539 540 541
        set_ue_dai (subframeP,
                    frame_parms[CC_id]->tdd_config,
                    UE_id,
                    CC_id,
                    UE_list);
        // update UL DAI after DLSCH scheduling
        set_ul_DAI(module_idP,UE_id,CC_id,frameP,subframeP,frame_parms);
542 543 544

      }

545 546 547 548 549 550 551
      if (continue_flag == 1 ) {
        add_ue_dlsch_info(module_idP,
                          CC_id,
                          UE_id,
                          subframeP,
                          S_DL_NONE);
        continue;
552
      }
553

554 555
      nb_available_rb = pre_nb_available_rbs[CC_id][UE_id];
      UE_list->eNB_UE_stats[CC_id][UE_id].crnti= rnti;
556
      UE_list->eNB_UE_stats[CC_id][UE_id].rrc_status=mac_eNB_get_rrc_status(module_idP,rnti);
557
      mac_xface->get_ue_active_harq_pid(module_idP,CC_id,rnti,frameP,subframeP,&harq_pid,&round,0);
558 559
      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;
560

561 562
      sdu_length_total=0;
      num_sdus=0;
563 564 565 566 567

      /*
      DevCheck(((eNB_UE_stats->DL_cqi[0] < MIN_CQI_VALUE) || (eNB_UE_stats->DL_cqi[0] > MAX_CQI_VALUE)),
      eNB_UE_stats->DL_cqi[0], MIN_CQI_VALUE, MAX_CQI_VALUE);
      */
568
      eNB_UE_stats->dlsch_mcs1 = cqi_to_mcs[eNB_UE_stats->DL_cqi[0]];
569
      eNB_UE_stats->dlsch_mcs1 = cmin(eNB_UE_stats->dlsch_mcs1, openair_daq_vars.target_ue_dl_mcs);
570

571

572
#ifdef EXMIMO
573

574
      if (mac_xface->get_transmission_mode(module_idP,CC_id, rnti)==5) {
575
        eNB_UE_stats->dlsch_mcs1 = cmin(eNB_UE_stats->dlsch_mcs1,16);
576
      }
577

578
#endif
579

580
      // store stats
581
      UE_list->eNB_UE_stats[CC_id][UE_id].dl_cqi= eNB_UE_stats->DL_cqi[0];
582

583
      // initializing the rb allocation indicator for each UE
584 585
      for(j=0; j<frame_parms[CC_id]->N_RBG; j++) {
        UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j] = 0;
586 587
      }

588
      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, ncc %d, rrc %d)\n",
589 590 591 592 593 594
            module_idP, frameP, UE_id,CC_id,rnti,harq_pid, round,nb_available_rb,
            eNB_UE_stats->DL_cqi[0], eNB_UE_stats->dlsch_mcs1,
            nCCE[CC_id],
            UE_list->eNB_UE_stats[CC_id][UE_id].rrc_status);


595 596
      // Note this code is for a specific DCI format
      DLSCH_dci = (void *)UE_list->UE_template[CC_id][UE_id].DLSCH_DCI[harq_pid];
597 598


599 600
      /* process retransmission  */

601
      if (round > 0) {
602 603 604 605 606 607 608 609 610 611 612 613 614 615

        if (frame_parms[CC_id]->frame_type == TDD) {
          UE_list->UE_template[CC_id][UE_id].DAI++;
          update_ul_dci(module_idP,CC_id,rnti,UE_list->UE_template[CC_id][UE_id].DAI);
          LOG_D(MAC,"DAI update: subframeP %d: UE %d, DAI %d\n",
                subframeP,UE_id,UE_list->UE_template[CC_id][UE_id].DAI);
        }

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

        if (nb_rb <= nb_available_rb) {

          if(nb_rb == pre_nb_available_rbs[CC_id][UE_id]) {
616
            for(j=0; j<frame_parms[CC_id]->N_RBG; j++) { // for indicating the rballoc for each sub-band
617
              UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j] = rballoc_sub_UE[CC_id][UE_id][j];
618
            }
619 620 621 622 623 624 625 626 627 628
          } else {
            nb_rb_temp = nb_rb;
            j = 0;

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

                if((j == frame_parms[CC_id]->N_RBG-1) &&
                    ((frame_parms[CC_id]->N_RB_DL == 25)||
629
                     (frame_parms[CC_id]->N_RB_DL == 50))) {
630
                  nb_rb_temp = nb_rb_temp - min_rb_unit[CC_id]+1;
631
                } else {
632
                  nb_rb_temp = nb_rb_temp - min_rb_unit[CC_id];
633
                }
634 635 636 637 638 639 640 641 642 643 644 645 646 647 648
              }

              j = j+1;
            }
          }

          nb_available_rb -= nb_rb;
          aggregation = process_ue_cqi(module_idP,UE_id);
          nCCE[CC_id]-=(1<<aggregation); // adjust the remaining nCCE
          nCCE_used[CC_id] += (1<<aggregation);


          PHY_vars_eNB_g[module_idP][CC_id]->mu_mimo_mode[UE_id].pre_nb_available_rbs = nb_rb;
          PHY_vars_eNB_g[module_idP][CC_id]->mu_mimo_mode[UE_id].dl_pow_off = dl_pow_off[CC_id][UE_id];

649
          for(j=0; j<frame_parms[CC_id]->N_RBG; j++) {
650
            PHY_vars_eNB_g[module_idP][CC_id]->mu_mimo_mode[UE_id].rballoc_sub[j] = UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j];
651
          }
652 653 654 655 656 657 658 659 660 661 662 663

          switch (mac_xface->get_transmission_mode(module_idP,CC_id,rnti)) {
          case 1:
          case 2:
          default:
            switch (frame_parms[CC_id]->N_RB_DL) {
            case 6:
              if (frame_parms[CC_id]->frame_type == TDD) {
                //        ((DCI1_1_5MHz_TDD_t*)DLSCH_dci)->ndi      = 0;
                ((DCI1_1_5MHz_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_1_5MHz_TDD_t*)DLSCH_dci)->rv       = round&3;
                ((DCI1_1_5MHz_TDD_t*)DLSCH_dci)->dai      = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
664 665
                LOG_D(MAC,"[eNB %d] Retransmission : harq_pid %d, round %d, dai %d, mcs %d\n",module_idP,harq_pid,round,(UE_list->UE_template[CC_id][UE_id].DAI-1),
                      ((DCI1_1_5MHz_TDD_t*)DLSCH_dci)->mcs);
666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681
              } else {
                //        ((DCI1_1_5MHz_FDD_t*)DLSCH_dci)->ndi      = 0;
                ((DCI1_1_5MHz_FDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_1_5MHz_FDD_t*)DLSCH_dci)->rv       = round&3;
                LOG_D(MAC,"[eNB %d] Retransmission : harq_pid %d, round %d, mcs %d\n",module_idP,harq_pid,round,((DCI1_1_5MHz_FDD_t*)DLSCH_dci)->mcs);

              }

              break;

            case 25:
              if (frame_parms[CC_id]->frame_type == TDD) {
                //        ((DCI1_5MHz_TDD_t*)DLSCH_dci)->ndi      = 0;
                ((DCI1_5MHz_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_5MHz_TDD_t*)DLSCH_dci)->rv       = round&3;
                ((DCI1_5MHz_TDD_t*)DLSCH_dci)->dai      = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
682 683
                LOG_D(MAC,"[eNB %d] Retransmission : harq_pid %d, round %d, dai %d, mcs %d\n",module_idP,harq_pid,round,(UE_list->UE_template[CC_id][UE_id].DAI-1),
                      ((DCI1_5MHz_TDD_t*)DLSCH_dci)->mcs);
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699
              } else {
                //        ((DCI1_5MHz_FDD_t*)DLSCH_dci)->ndi      = 0;
                ((DCI1_5MHz_FDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_5MHz_FDD_t*)DLSCH_dci)->rv       = round&3;
                LOG_D(MAC,"[eNB %d] Retransmission : harq_pid %d, round %d, mcs %d\n",module_idP,harq_pid,round,((DCI1_5MHz_FDD_t*)DLSCH_dci)->mcs);

              }

              break;

            case 50:
              if (frame_parms[CC_id]->frame_type == TDD) {
                //        ((DCI1_10MHz_TDD_t*)DLSCH_dci)->ndi      = 0;
                ((DCI1_10MHz_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_10MHz_TDD_t*)DLSCH_dci)->rv       = round&3;
                ((DCI1_10MHz_TDD_t*)DLSCH_dci)->dai      = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
700 701
                LOG_D(MAC,"[eNB %d] Retransmission : harq_pid %d, round %d, dai %d, mcs %d\n",module_idP,harq_pid,round,(UE_list->UE_template[CC_id][UE_id].DAI-1),
                      ((DCI1_10MHz_TDD_t*)DLSCH_dci)->mcs);
702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717
              } else {
                //        ((DCI1_10MHz_FDD_t*)DLSCH_dci)->ndi      = 0;
                ((DCI1_10MHz_FDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_10MHz_FDD_t*)DLSCH_dci)->rv       = round&3;
                LOG_D(MAC,"[eNB %d] Retransmission : harq_pid %d, round %d, mcs %d\n",module_idP,harq_pid,round,((DCI1_10MHz_FDD_t*)DLSCH_dci)->mcs);

              }

              break;

            case 100:
              if (frame_parms[CC_id]->frame_type == TDD) {
                //        ((DCI1_20MHz_TDD_t*)DLSCH_dci)->ndi      = 0;
                ((DCI1_20MHz_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_20MHz_TDD_t*)DLSCH_dci)->rv       = round&3;
                ((DCI1_20MHz_TDD_t*)DLSCH_dci)->dai      = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
718 719
                LOG_D(MAC,"[eNB %d] Retransmission : harq_pid %d, round %d, dai %d, mcs %d\n",module_idP,harq_pid,round,(UE_list->UE_template[CC_id][UE_id].DAI-1),
                      ((DCI1_20MHz_TDD_t*)DLSCH_dci)->mcs);
720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754
              } else {
                //        ((DCI1_20MHz_FDD_t*)DLSCH_dci)->ndi      = 0;
                ((DCI1_20MHz_FDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_20MHz_FDD_t*)DLSCH_dci)->rv       = round&3;
                LOG_D(MAC,"[eNB %d] Retransmission : harq_pid %d, round %d, mcs %d\n",module_idP,harq_pid,round,((DCI1_20MHz_FDD_t*)DLSCH_dci)->mcs);

              }

              break;
            }

            break;

          case 4:
            //    if (nb_rb>10) {
            ((DCI2_5MHz_2A_TDD_t*)DLSCH_dci)->ndi1 = 0;
            ((DCI2_5MHz_2A_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
            ((DCI2_5MHz_2A_TDD_t*)DLSCH_dci)->dai = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
            // }
            //else {
            //  ((DCI2_5MHz_2A_L10PRB_TDD_t*)DLSCH_dci)->ndi1 = 0;
            // ((DCI2_5MHz_2A_L10PRB_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
            // ((DCI2_5MHz_2A_L10PRB_TDD_t*)DLSCH_dci)->rv1 = round&3;
            // ((DCI2_5MHz_2A_L10PRB_TDD_t*)DLSCH_dci)->dai = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
            // }
            break;

          case 5:
            // if(nb_rb>10){
            //((DCI1E_5MHz_2A_M10PRB_TDD_t*)DLSCH_dci)->mcs = eNB_UE_stats->DL_cqi[0]<<1;
            ((DCI1E_5MHz_2A_M10PRB_TDD_t*)DLSCH_dci)->ndi = 0;
            ((DCI1E_5MHz_2A_M10PRB_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
            ((DCI1E_5MHz_2A_M10PRB_TDD_t*)DLSCH_dci)->rv = round&3;
            ((DCI1E_5MHz_2A_M10PRB_TDD_t*)DLSCH_dci)->dai = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;

755
            if(dl_pow_off[CC_id][UE_id] == 2) {
756
              dl_pow_off[CC_id][UE_id] = 1;
757
            }
758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798

            ((DCI1E_5MHz_2A_M10PRB_TDD_t*)DLSCH_dci)->dl_power_off = dl_pow_off[CC_id][UE_id];
            // }
            break;

          case 6:
            ((DCI1E_5MHz_2A_M10PRB_TDD_t*)DLSCH_dci)->ndi = 0;
            ((DCI1E_5MHz_2A_M10PRB_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
            ((DCI1E_5MHz_2A_M10PRB_TDD_t*)DLSCH_dci)->rv = round&3;
            ((DCI1E_5MHz_2A_M10PRB_TDD_t*)DLSCH_dci)->dai = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
            ((DCI1E_5MHz_2A_M10PRB_TDD_t*)DLSCH_dci)->dl_power_off = 1;//dl_pow_off[UE_id];
            break;
          }

          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].ncce_used_retx=nCCE[CC_id];
          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 : don't schedule UE %d, its retransmission takes more resources than we have\n", module_idP, frameP, 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 = mac_xface->get_TBS(eNB_UE_stats->DL_cqi[0]<<1,nb_available_rb);
        TBS = mac_xface->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

        //#ifndef EXMIMO_IOT
799
        // to be checked by RK, NN, FK
800
        uint8_t update_TA=4;
801 802

        switch (frame_parms[CC_id]->N_RB_DL) {
803 804 805
        case 6:
          update_TA = 1;
          break;
806

807 808 809
        case 25:
          update_TA = 4;
          break;
810

811 812 813
        case 50:
          update_TA = 8;
          break;
814

815 816 817
        case 100:
          update_TA = 16;
          break;
818 819 820 821 822 823 824 825 826 827 828 829
        }

        ta_len = ((eNB_UE_stats->timing_advance_update/update_TA)!=0) ? 2 : 0;
        /*#else
        ta_len = 0;
        #endif*/

        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,
830
                         rnti,
831 832 833 834 835 836 837 838 839 840 841 842
                         frameP,
                         ENB_FLAG_YES,
                         MBMS_FLAG_NO,
                         DCCH,
                         (TBS-ta_len-header_len_dcch)); // transport block set size

          sdu_lengths[0]=0;

          if (rlc_status.bytes_in_buffer > 0) {  // There is DCCH to transmit
            LOG_D(MAC,"[eNB %d] Frame %d, DL-DCCH->DLSCH, Requesting %d bytes from RLC (RRC message)\n",module_idP,frameP,TBS-header_len_dcch);
            sdu_lengths[0] += mac_rlc_data_req(
                                module_idP,
843
                                rnti,
844 845 846 847 848 849 850 851 852 853 854 855
                                frameP,
                                ENB_FLAG_YES,
                                MBMS_FLAG_NO,
                                DCCH,
                                (char *)&dlsch_buffer[sdu_lengths[0]]);

            LOG_D(MAC,"[eNB %d][DCCH] Got %d bytes from RLC\n",module_idP,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;
856
#ifdef DEBUG_eNB_SCHEDULER
857 858
            LOG_T(MAC,"[eNB %d][DCCH] Got %d bytes :",module_idP,sdu_lengths[0]);

859
            for (j=0; j<sdu_lengths[0]; j++) {
860
              LOG_T(MAC,"%x ",dlsch_buffer[j]);
861
            }
862 863 864 865 866 867 868 869 870 871 872 873 874

            LOG_T(MAC,"\n");
#endif
          } 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,
875
                         rnti,
876 877 878 879 880 881 882 883 884 885 886 887
                         frameP,
                         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

          if (rlc_status.bytes_in_buffer > 0) {
            LOG_D(MAC,"[eNB %d], Frame %d, DCCH1->DLSCH, Requesting %d bytes from RLC (RRC message)\n",
                  module_idP,frameP,TBS-header_len_dcch-sdu_length_total);
            sdu_lengths[num_sdus] += mac_rlc_data_req(
                                       module_idP,
888
                                       rnti,
889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916
                                       frameP,
                                       ENB_FLAG_YES,
                                       MBMS_FLAG_NO,
                                       DCCH+1,
                                       (char *)&dlsch_buffer[sdu_lengths[0]]);

            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++;
            LOG_D(MAC,"[eNB %d] Got %d bytes for DCCH from RLC\n",module_idP,sdu_lengths[0]);
          }
        }

        // check for DTCH and update header information
        // here we should loop over all possible DTCH

        header_len_dtch = 3; // 3 bytes DTCH SDU subheader

        LOG_D(MAC,"[eNB %d], Frame %d, DTCH->DLSCH, Checking RLC status (rab %d, tbs %d, len %d)\n",
              module_idP,frameP,DTCH,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 ) {
          rlc_status = mac_rlc_status_ind(
                         module_idP,
917
                         rnti,
918 919 920 921 922 923 924 925 926 927 928 929
                         frameP,
                         ENB_FLAG_YES,
                         MBMS_FLAG_NO,
                         DTCH,
                         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 (hdr len dtch %d)\n",
                  module_idP,frameP,TBS-header_len_dcch-sdu_length_total-header_len_dtch,header_len_dtch);
            sdu_lengths[num_sdus] = mac_rlc_data_req(
                                      module_idP,
930
                                      rnti,
931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970
                                      frameP,
                                      ENB_FLAG_YES,
                                      MBMS_FLAG_NO,
                                      DTCH,
                                      (char*)&dlsch_buffer[sdu_length_total]);

            LOG_D(MAC,"[eNB %d][USER-PLANE DEFAULT DRB] Got %d bytes for DTCH %d \n",module_idP,sdu_lengths[num_sdus],DTCH);
            sdu_lcids[num_sdus] = DTCH;
            sdu_length_total += sdu_lengths[num_sdus];
            UE_list->eNB_UE_stats[CC_id][UE_id].num_pdu_tx[DTCH]+=1;
            UE_list->eNB_UE_stats[CC_id][UE_id].num_bytes_tx[DTCH]+=sdu_lengths[num_sdus];

            if (sdu_lengths[num_sdus] < 128) {
              header_len_dtch=2;
            }

            num_sdus++;
          } else {
            header_len_dtch = 0;
          }
        }

        // there is a payload
        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 : header_len_dcch;  // remove length field
          } else {
            header_len_dtch = (header_len_dtch > 0) ? 1 :header_len_dtch;     // remove length field for the last SDU
          }


          mcs = eNB_UE_stats->dlsch_mcs1;

971 972 973 974 975
          if (mcs==0) {
            nb_rb = 4;  // don't let the TBS get too small
          } else {
            nb_rb=min_rb_unit[CC_id];
          }
976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005

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

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

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

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

                if ((j == frame_parms[CC_id]->N_RBG-1) &&
                    ((frame_parms[CC_id]->N_RB_DL == 25)||
1006
                     (frame_parms[CC_id]->N_RB_DL == 50))) {
1007
                  nb_rb_temp = nb_rb_temp - min_rb_unit[CC_id]+1;
1008
                } else {
1009
                  nb_rb_temp = nb_rb_temp - min_rb_unit[CC_id];
1010
                }
1011 1012 1013 1014 1015 1016 1017 1018 1019
              }

              j = j+1;
            }
          }

          PHY_vars_eNB_g[module_idP][CC_id]->mu_mimo_mode[UE_id].pre_nb_available_rbs = nb_rb;
          PHY_vars_eNB_g[module_idP][CC_id]->mu_mimo_mode[UE_id].dl_pow_off = dl_pow_off[CC_id][UE_id];

1020
          for(j=0; j<frame_parms[CC_id]->N_RBG; j++) {
1021 1022
            PHY_vars_eNB_g[module_idP][CC_id]->mu_mimo_mode[UE_id].rballoc_sub[j] = UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j];

1023
          }
1024 1025 1026 1027 1028 1029 1030 1031

          // 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 = mac_xface->get_TBS_DL(mcs,nb_rb);
          }

          // if we have decreased too much or we don't have enough RBs, increase MCS
1032 1033
          while ((TBS < (sdu_length_total + header_len_dcch + header_len_dtch + ta_len)) && ((( dl_pow_off[CC_id][UE_id]>0) && (mcs<28))
                 || ( (dl_pow_off[CC_id][UE_id]==0) && (mcs<=15)))) {
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044
            mcs++;
            TBS = mac_xface->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);

#ifdef DEBUG_eNB_SCHEDULER
          LOG_D(MAC,"[eNB %d] Generated DLSCH header (mcs %d, TBS %d, nb_rb %d)\n",
                module_idP,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);
1045
#endif
1046 1047 1048 1049 1050 1051 1052 1053

          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
1054
            if (header_len_dtch==0) {
1055
              header_len_dcch = header_len_dcch_tmp;
1056
            } else { //if (( header_len_dcch==0)&&((header_len_dtch==1)||(header_len_dtch==2)))
1057
              header_len_dtch = header_len_dtch_tmp;
1058
            }
1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079

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

          //#ifndef EXMIMO_IOT
          ta_update = eNB_UE_stats->timing_advance_update/update_TA;
          /*#else
          ta_update = 0;
          #endif*/

          offset = generate_dlsch_header((unsigned char*)UE_list->DLSCH_pdu[CC_id][0][UE_id].payload[0],
                                         // offset = generate_dlsch_header((unsigned char*)eNB_mac_inst[0].DLSCH_pdu[0][0].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
1080 1081
          if (ta_update) {
            LOG_I(MAC,
1082 1083 1084
                "[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);
1085
          }
1086 1087

          //#endif
1088
#ifdef DEBUG_eNB_SCHEDULER
1089 1090
          LOG_T(MAC,"[eNB %d] First 16 bytes of DLSCH : \n");

1091
          for (i=0; i<16; i++) {
1092
            LOG_T(MAC,"%x.",dlsch_buffer[i]);
1093
          }
1094 1095

          LOG_T(MAC,"\n");
1096
#endif
1097 1098 1099 1100 1101
          // cycle through SDUs and place in dlsch_buffer
          memcpy(&UE_list->DLSCH_pdu[CC_id][0][UE_id].payload[0][offset],dlsch_buffer,sdu_length_total);
          // memcpy(&eNB_mac_inst[0].DLSCH_pdu[0][0].payload[0][offset],dcch_buffer,sdu_lengths[0]);

          // fill remainder of DLSCH with random data
1102
          for (j=0; j<(TBS-sdu_length_total-offset); j++) {
1103
            UE_list->DLSCH_pdu[CC_id][0][UE_id].payload[0][offset+sdu_length_total+j] = (char)(taus()&0xff);
1104
          }
1105 1106

          //eNB_mac_inst[0].DLSCH_pdu[0][0].payload[0][offset+sdu_lengths[0]+j] = (char)(taus()&0xff);
1107
#if defined(USER_MODE) && defined(OAI_EMU)
1108 1109

          /* Tracing of PDU is done on UE side */
1110
          if (oai_emulation.info.opt_enabled)
1111 1112 1113 1114 1115
            trace_pdu(1, (uint8_t *)UE_list->DLSCH_pdu[CC_id][0][UE_id].payload[0],
                      TBS, module_idP, 3, UE_RNTI(module_idP,UE_id),
                      eNB->subframe,0,0);
            LOG_D(OPT,"[eNB %d][DLSCH] Frame %d  rnti %x  with size %d\n",
                  module_idP, frameP, UE_RNTI(module_idP,UE_id), TBS);
1116
#endif
1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390

          aggregation = process_ue_cqi(module_idP,UE_id);
          nCCE[CC_id]-=(1<<aggregation); // adjust the remaining nCCE
          nCCE_used[CC_id]+=(1<<aggregation); // adjust the remaining nCCE
          UE_list->UE_template[CC_id][UE_id].nb_rb[harq_pid] = nb_rb;

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

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

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

          if (frame_parms[CC_id]->frame_type == TDD) {
            UE_list->UE_template[CC_id][UE_id].DAI++;
            //  printf("DAI update: subframeP %d: UE %d, DAI %d\n",subframeP,UE_id,UE_list->UE_template[CC_id][UE_id].DAI);
#warning only for 5MHz channel
            update_ul_dci(module_idP,CC_id,rnti,UE_list->UE_template[CC_id][UE_id].DAI);
          }

          switch (mac_xface->get_transmission_mode(module_idP,CC_id,rnti)) {
          case 1:
          case 2:
          default:
            if (frame_parms[CC_id]->frame_type == TDD) {
              switch (frame_parms[CC_id]->N_RB_DL) {
              case 6:
                ((DCI1_1_5MHz_TDD_t*)DLSCH_dci)->mcs = mcs;
                ((DCI1_1_5MHz_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_1_5MHz_TDD_t*)DLSCH_dci)->ndi = 1-UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
                ((DCI1_1_5MHz_TDD_t*)DLSCH_dci)->rv = 0;
                ((DCI1_1_5MHz_TDD_t*)DLSCH_dci)->dai      = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
                break;

              case 25:
                ((DCI1_5MHz_TDD_t*)DLSCH_dci)->mcs = mcs;
                ((DCI1_5MHz_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_5MHz_TDD_t*)DLSCH_dci)->ndi = 1-UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
                ((DCI1_5MHz_TDD_t*)DLSCH_dci)->rv = 0;
                ((DCI1_5MHz_TDD_t*)DLSCH_dci)->dai      = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
                LOG_D(MAC,"Format1 DCI: harq_pid %d, ndi %d\n",harq_pid,((DCI1_5MHz_TDD_t*)DLSCH_dci)->ndi);
                break;

              case 50:
                ((DCI1_10MHz_TDD_t*)DLSCH_dci)->mcs = mcs;
                ((DCI1_10MHz_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_10MHz_TDD_t*)DLSCH_dci)->ndi = 1-UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
                ((DCI1_10MHz_TDD_t*)DLSCH_dci)->rv = 0;
                ((DCI1_10MHz_TDD_t*)DLSCH_dci)->dai      = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
                break;

              case 100:
                ((DCI1_20MHz_TDD_t*)DLSCH_dci)->mcs = mcs;
                ((DCI1_20MHz_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_20MHz_TDD_t*)DLSCH_dci)->ndi = 1-UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
                ((DCI1_20MHz_TDD_t*)DLSCH_dci)->rv = 0;
                ((DCI1_20MHz_TDD_t*)DLSCH_dci)->dai      = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
                break;

              default:
                ((DCI1_5MHz_TDD_t*)DLSCH_dci)->mcs = mcs;
                ((DCI1_5MHz_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_5MHz_TDD_t*)DLSCH_dci)->ndi = 1-UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
                ((DCI1_5MHz_TDD_t*)DLSCH_dci)->rv = 0;
                ((DCI1_5MHz_TDD_t*)DLSCH_dci)->dai      = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
                break;
              }
            } else {
              switch (frame_parms[CC_id]->N_RB_DL) {
              case 6:
                ((DCI1_1_5MHz_FDD_t*)DLSCH_dci)->mcs = mcs;
                ((DCI1_1_5MHz_FDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_1_5MHz_FDD_t*)DLSCH_dci)->ndi = 1-UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
                ((DCI1_1_5MHz_FDD_t*)DLSCH_dci)->rv = 0;
                break;

              case 25:
                ((DCI1_5MHz_FDD_t*)DLSCH_dci)->mcs = mcs;
                ((DCI1_5MHz_FDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_5MHz_FDD_t*)DLSCH_dci)->ndi = 1-UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
                ((DCI1_5MHz_FDD_t*)DLSCH_dci)->rv = 0;
                break;

              case 50:
                ((DCI1_10MHz_FDD_t*)DLSCH_dci)->mcs = mcs;
                ((DCI1_10MHz_FDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_10MHz_FDD_t*)DLSCH_dci)->ndi = 1-UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
                ((DCI1_10MHz_FDD_t*)DLSCH_dci)->rv = 0;
                break;

              case 100:
                ((DCI1_20MHz_FDD_t*)DLSCH_dci)->mcs = mcs;
                ((DCI1_20MHz_FDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_20MHz_FDD_t*)DLSCH_dci)->ndi = 1-UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
                ((DCI1_20MHz_FDD_t*)DLSCH_dci)->rv = 0;
                break;

              default:
                ((DCI1_5MHz_FDD_t*)DLSCH_dci)->mcs = mcs;
                ((DCI1_5MHz_FDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI1_5MHz_FDD_t*)DLSCH_dci)->ndi = 1-UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
                ((DCI1_5MHz_FDD_t*)DLSCH_dci)->rv = 0;
                break;
              }
            }

            break;

          case 3:
            if (frame_parms[CC_id]->frame_type == TDD) {
              switch (frame_parms[CC_id]->N_RB_DL) {
              case 6:
                ((DCI2A_1_5MHz_2A_TDD_t*)DLSCH_dci)->mcs1 = mcs;
                ((DCI2A_1_5MHz_2A_TDD_t*)DLSCH_dci)->harq_pid = harq_pid;
                ((DCI2A_1_5MHz_2A_TDD_t*)DLSCH_dci)->ndi1 = 1-UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
                ((DCI2A_1_5MHz_2A_TDD_t*)DLSCH_dci)->rv1 = 0;

                // deactivate TB2
                ((DCI2A_1_5MHz_2A_TDD_t*)DLSCH_dci)->mcs2 = 0;
                ((DCI2A_1_5MHz_2A_TDD_t*)DLSCH_dci)->rv2 = 1;

                ((DCI2A_1_5MHz_2A_TDD_t*)DLSCH_dci)->dai      = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
                break;

              case 25:
                ((DCI2A_5MHz_2A_TDD_t*)DLSCH_dci)->mcs1 = mcs;
                ((DCI2A_5MHz_2A_TDD_t*)DLSCH_dci)->