ue_procedures.c 73 KB
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/*******************************************************************************

  Eurecom OpenAirInterface
  Copyright(c) 1999 - 2010 Eurecom

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope 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.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information
  Openair Admin: openair_admin@eurecom.fr
  Openair Tech : openair_tech@eurecom.fr
  Forums       : http://forums.eurecom.fsr/openairinterface
  Address      : Eurecom, 2229, route des crêtes, 06560 Valbonne Sophia Antipolis, France

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 *******************************************************************************/
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/*! \file ue_procedures.c
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 * \brief procedures related to UE
 * \author Raymond Knopp, Navid Nikaein
 * \date 2011
 * \version 0.5
 * \email: navid.nikaein@eurecom.fr
 * @ingroup _mac
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 */
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#ifdef EXMIMO
#include <pthread.h>
#endif

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#include "extern.h"
#include "defs.h"
#ifdef PHY_EMUL
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# include "SIMULATION/PHY_EMULATION/impl_defs.h"
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#else
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# include "SCHED/defs.h"
# include "PHY/impl_defs_top.h"
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#endif
#include "PHY_INTERFACE/defs.h"
#include "PHY_INTERFACE/extern.h"
#include "COMMON/mac_rrc_primitives.h"
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#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
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#include "RRC/LITE/extern.h"
#include "UTIL/LOG/log.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
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#include "UTIL/OPT/opt.h"
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#include "OCG.h"
#include "OCG_extern.h"
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#ifdef PHY_EMUL
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# include "SIMULATION/simulation_defs.h"
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#endif
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#include "pdcp.h"
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#if defined(ENABLE_ITTI)
# include "intertask_interface.h"
#endif

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#include "assertions.h"

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#define DEBUG_HEADER_PARSING 1
#define ENABLE_MAC_PAYLOAD_DEBUG

/*
#ifndef USER_MODE
#define msg debug_msg
#endif
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 */
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mapping BSR_names[] = {
    {"NONE", 0},
    {"SHORT BSR", 1},
    {"TRUNCATED BSR", 2},
    {"LONG BSR", 3},
    {"PADDING BSR", 4},
    {NULL, -1}
};

extern inline unsigned int taus(void);


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void ue_init_mac(module_id_t module_idP){
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  int i;
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  // default values as deined in 36.331 sec 9.2.2
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  LOG_I(MAC,"[UE%d] Applying default macMainConfig\n",module_idP);

  //UE_mac_inst[module_idP].scheduling_info.macConfig=NULL;
  UE_mac_inst[module_idP].scheduling_info.retxBSR_Timer= MAC_MainConfig__ul_SCH_Config__retxBSR_Timer_sf2560;
  UE_mac_inst[module_idP].scheduling_info.periodicBSR_Timer=MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_infinity;
  UE_mac_inst[module_idP].scheduling_info.periodicPHR_Timer = MAC_MainConfig__phr_Config__setup__periodicPHR_Timer_sf20;
  UE_mac_inst[module_idP].scheduling_info.prohibitPHR_Timer = MAC_MainConfig__phr_Config__setup__prohibitPHR_Timer_sf20;
  UE_mac_inst[module_idP].scheduling_info.PathlossChange_db = MAC_MainConfig__phr_Config__setup__dl_PathlossChange_dB1;
  UE_mac_inst[module_idP].PHR_state = MAC_MainConfig__phr_Config_PR_setup;
  UE_mac_inst[module_idP].scheduling_info.SR_COUNTER=0;
  UE_mac_inst[module_idP].scheduling_info.sr_ProhibitTimer=0;
  UE_mac_inst[module_idP].scheduling_info.sr_ProhibitTimer_Running=0;
  UE_mac_inst[module_idP].scheduling_info.maxHARQ_Tx=MAC_MainConfig__ul_SCH_Config__maxHARQ_Tx_n5;
  UE_mac_inst[module_idP].scheduling_info.ttiBundling=0;
  UE_mac_inst[module_idP].scheduling_info.drx_config=NULL;
  UE_mac_inst[module_idP].scheduling_info.phr_config=NULL;
  UE_mac_inst[module_idP].scheduling_info.periodicBSR_SF  =  get_sf_periodicBSRTimer(UE_mac_inst[module_idP].scheduling_info.periodicBSR_Timer);
  UE_mac_inst[module_idP].scheduling_info.retxBSR_SF     =  get_sf_retxBSRTimer(UE_mac_inst[module_idP].scheduling_info.retxBSR_Timer);
  UE_mac_inst[module_idP].scheduling_info.periodicPHR_SF =  get_sf_perioidicPHR_Timer(UE_mac_inst[module_idP].scheduling_info.periodicPHR_Timer);
  UE_mac_inst[module_idP].scheduling_info.prohibitPHR_SF =  get_sf_prohibitPHR_Timer(UE_mac_inst[module_idP].scheduling_info.prohibitPHR_Timer);
  UE_mac_inst[module_idP].scheduling_info.PathlossChange_db =  get_db_dl_PathlossChange(UE_mac_inst[module_idP].scheduling_info.PathlossChange);

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  for (i=0; i < MAX_NUM_LCID; i++){
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      LOG_D(MAC,"[UE%d] Applying default logical channel config for LCGID %d\n",module_idP,i);
      UE_mac_inst[module_idP].scheduling_info.Bj[i]=-1;
      UE_mac_inst[module_idP].scheduling_info.bucket_size[i]=-1;
      if (i < DTCH) // initilize all control channels lcgid to 0
        UE_mac_inst[module_idP].scheduling_info.LCGID[i]=0;
      else // initialize all the data channels lcgid to 1
        UE_mac_inst[module_idP].scheduling_info.LCGID[i]=1;
      UE_mac_inst[module_idP].scheduling_info.LCID_status[i]=0;
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  }
}

unsigned char *parse_header(unsigned char *mac_header,
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    unsigned char *num_ce,
    unsigned char *num_sdu,
    unsigned char *rx_ces,
    unsigned char *rx_lcids,
    unsigned short *rx_lengths,
    unsigned short tb_length) {
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  unsigned char not_done=1,num_ces=0,num_sdus=0,lcid, num_sdu_cnt;
  unsigned char *mac_header_ptr = mac_header;
  unsigned short length,ce_len=0;

  while (not_done==1) {

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      if (((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E == 0) {
          //      printf("E=0\n");
          not_done = 0;
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      }
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      lcid = ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID;
      if (lcid < UE_CONT_RES) {
          //printf("[MAC][UE] header %x.%x.%x\n",mac_header_ptr[0],mac_header_ptr[1],mac_header_ptr[2]);
          if (not_done==0) {// last MAC SDU, length is implicit
              mac_header_ptr++;
              length = tb_length-(mac_header_ptr-mac_header)-ce_len;
              for (num_sdu_cnt=0; num_sdu_cnt < num_sdus ; num_sdu_cnt++)
                length -= rx_lengths[num_sdu_cnt];
          }
          else {
              if (((SCH_SUBHEADER_LONG *)mac_header_ptr)->F == 1) {
                  length = ((((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_MSB & 0x7f ) << 8 ) | (((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_LSB & 0xff);
                  mac_header_ptr += 3;
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#ifdef DEBUG_HEADER_PARSING
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                  LOG_D(MAC,"[UE] parse long sdu, size %x \n",length);
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#endif
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              }  else {	//if (((SCH_SUBHEADER_SHORT *)mac_header_ptr)->F == 0) {
                  length = ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->L;
                  mac_header_ptr += 2;
              }
          }
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#ifdef DEBUG_HEADER_PARSING
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          LOG_D(MAC,"[UE] sdu %d lcid %d length %d (offset now %d)\n",
              num_sdus,lcid,length,mac_header_ptr-mac_header);
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#endif
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          rx_lcids[num_sdus] = lcid;
          rx_lengths[num_sdus] = length;
          num_sdus++;
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      }
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      else {  // This is a control element subheader
          if (lcid == SHORT_PADDING) {
              mac_header_ptr++;
          }
          else {
              rx_ces[num_ces] = lcid;
              num_ces++;
              mac_header_ptr ++;
              if (lcid==TIMING_ADV_CMD)
                ce_len++;
              else if (lcid==UE_CONT_RES)
                ce_len+=6;
          }
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#ifdef DEBUG_HEADER_PARSING
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          LOG_D(MAC,"[UE] ce %d lcid %d (offset now %d)\n",num_ces,lcid,mac_header_ptr-mac_header);
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#endif
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      }
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  }
  *num_ce = num_ces;
  *num_sdu = num_sdus;

  return(mac_header_ptr);
}

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uint32_t ue_get_SR(module_id_t module_idP,frame_t frameP,uint8_t eNB_id,uint16_t rnti, sub_frame_t subframe) {
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  // no UL-SCH resources available for this tti && UE has a valid PUCCH resources for SR configuration for this tti
  //  int MGL=6;// measurement gap length in ms
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  int MGRP       = 0; // measurement gap repetition period in ms
  int gapOffset  = -1;
  int T          = 0;
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  DevCheck(module_idP < NB_UE_INST, module_idP, NB_UE_INST, 0);
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  // determin the measurement gap
  LOG_D(MAC,"[UE %d][SR %x] Frame %d subframe %d PHY asks for SR (SR_COUNTER/dsr_TransMax %d/%d), SR_pending %d\n",
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      module_idP,rnti,frameP,subframe,
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      UE_mac_inst[module_idP].scheduling_info.SR_COUNTER,
      (1<<(2+UE_mac_inst[module_idP].physicalConfigDedicated->schedulingRequestConfig->choice.setup.dsr_TransMax)),
      UE_mac_inst[module_idP].scheduling_info.SR_pending);

  if (UE_mac_inst[module_idP].measGapConfig !=NULL){
      if (UE_mac_inst[module_idP].measGapConfig->choice.setup.gapOffset.present == MeasGapConfig__setup__gapOffset_PR_gp0){
          MGRP= 40;
          gapOffset= UE_mac_inst[module_idP].measGapConfig->choice.setup.gapOffset.choice.gp0;
      }else if (UE_mac_inst[module_idP].measGapConfig->choice.setup.gapOffset.present == MeasGapConfig__setup__gapOffset_PR_gp1){
          MGRP= 80;
          gapOffset= UE_mac_inst[module_idP].measGapConfig->choice.setup.gapOffset.choice.gp1;
      }else{
          LOG_W(MAC, "Measurement GAP offset is unknown\n");
      }
      T=MGRP/10;
      //check the measurement gap and sr prohibit timer
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      if ((subframe ==  gapOffset %10) && ((frameP %T) == (floor(gapOffset/10)))
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          && (UE_mac_inst[module_idP].scheduling_info.sr_ProhibitTimer_Running =0)){
          UE_mac_inst[module_idP].scheduling_info.SR_pending=1;
          return(0);
      }
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  }
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  if ((UE_mac_inst[module_idP].scheduling_info.SR_pending==1) &&
      (UE_mac_inst[module_idP].scheduling_info.SR_COUNTER <
          (1<<(2+UE_mac_inst[module_idP].physicalConfigDedicated->schedulingRequestConfig->choice.setup.dsr_TransMax)))
  ){
      UE_mac_inst[module_idP].scheduling_info.SR_COUNTER++;
      // start the sr-prohibittimer : rel 9 and above
      if (UE_mac_inst[module_idP].scheduling_info.sr_ProhibitTimer > 0) { // timer configured
          UE_mac_inst[module_idP].scheduling_info.sr_ProhibitTimer--;
          UE_mac_inst[module_idP].scheduling_info.sr_ProhibitTimer_Running=1;
      } else
        UE_mac_inst[module_idP].scheduling_info.sr_ProhibitTimer_Running=0;
      LOG_D(MAC,"[UE %d][SR %x] Frame %d subframe %d send SR_indication (SR_COUNTER/dsr_TransMax %d/%d), SR_pending %d\n",
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          module_idP,rnti,frameP,subframe,
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          UE_mac_inst[module_idP].scheduling_info.SR_COUNTER,
          (1<<(2+UE_mac_inst[module_idP].physicalConfigDedicated->schedulingRequestConfig->choice.setup.dsr_TransMax)),
          UE_mac_inst[module_idP].scheduling_info.SR_pending);

      //UE_mac_inst[module_idP].ul_active =1;

      return(1); //instruct phy to signal SR
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  }
  else{
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      // notify RRC to relase PUCCH/SRS
      // clear any configured dl/ul
      // initiate RA
      UE_mac_inst[module_idP].scheduling_info.SR_pending=0;
      UE_mac_inst[module_idP].scheduling_info.SR_COUNTER=0;
      return(0);
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  }
}

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void ue_send_sdu(module_id_t module_idP,frame_t frameP,uint8_t *sdu,uint16_t sdu_len,uint8_t eNB_index) {
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  unsigned char rx_ces[MAX_NUM_CE],num_ce,num_sdu,i,*payload_ptr;
  unsigned char rx_lcids[NB_RB_MAX];
  unsigned short rx_lengths[NB_RB_MAX];
  unsigned char *tx_sdu;

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  start_meas(&UE_mac_inst[module_idP].rx_dlsch_sdu);
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  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SEND_SDU, VCD_FUNCTION_IN);

  LOG_T(MAC,"sdu: %x.%x.%x\n",sdu[0],sdu[1],sdu[2]);

#if defined(USER_MODE) && defined(OAI_EMU)
  if (oai_emulation.info.opt_enabled) {
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      trace_pdu(1, sdu, sdu_len, module_idP, 3, UE_mac_inst[module_idP].crnti,
          UE_mac_inst[module_idP].subframe, 0, 0);
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  }
#endif

  payload_ptr = parse_header(sdu,&num_ce,&num_sdu,rx_ces,rx_lcids,rx_lengths,sdu_len);

#ifdef DEBUG_HEADER_PARSING
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  LOG_D(MAC,"[UE %d] ue_send_sdu : Frame %d eNB_index %d : num_ce %d num_sdu %d\n",module_idP,
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      frameP,eNB_index,num_ce,num_sdu);
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#endif

#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
  LOG_T(MAC,"[eNB %d] First 32 bytes of DLSCH : \n");
  for (i=0;i<32;i++)
    LOG_T(MAC,"%x.",sdu[i]);
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  LOG_T(MAC,"\n");
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#endif

  for (i=0;i<num_ce;i++) {
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      //    printf("ce %d : %d\n",i,rx_ces[i]);
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      switch (rx_ces[i]) {
      case UE_CONT_RES:

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        LOG_I(MAC,"[UE %d][RAPROC] Frame %d : received contention resolution msg: %x.%x.%x.%x.%x.%x, Terminating RA procedure\n",
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            module_idP,frameP,payload_ptr[0],payload_ptr[1],payload_ptr[2],payload_ptr[3],payload_ptr[4],payload_ptr[5]);
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        if (UE_mac_inst[module_idP].RA_active == 1) {
            LOG_I(MAC,"[UE %d][RAPROC] Frame %d : Clearing RA_active flag\n");
            UE_mac_inst[module_idP].RA_active=0;
            // check if RA procedure has finished completely (no contention)
            tx_sdu = &UE_mac_inst[module_idP].CCCH_pdu.payload[3];
            //Note: 3 assumes sizeof(SCH_SUBHEADER_SHORT) + PADDING CE, which is when UL-Grant has TBS >= 9 (64 bits)
            // (other possibility is 1 for TBS=7 (SCH_SUBHEADER_FIXED), or 2 for TBS=8 (SCH_SUBHEADER_FIXED+PADDING or SCH_SUBHEADER_SHORT)
            for (i=0;i<6;i++)
              if (tx_sdu[i] != payload_ptr[i]) {
                  LOG_E(MAC,"[UE %d][RAPROC] Contention detected, RA failed\n",module_idP);
                  mac_xface->ra_failed(module_idP,eNB_index);
                  UE_mac_inst[module_idP].RA_contention_resolution_timer_active = 0;
                  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SEND_SDU, VCD_FUNCTION_OUT);
                  return;
              }
            LOG_I(MAC,"[UE %d][RAPROC] Frame %d : Clearing contention resolution timer\n");
            UE_mac_inst[module_idP].RA_contention_resolution_timer_active = 0;
            mac_xface->ra_succeeded(module_idP,eNB_index);
        }
        payload_ptr+=6;
        break;
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      case TIMING_ADV_CMD:
#ifdef DEBUG_HEADER_PARSING
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        LOG_D(MAC,"[UE] CE %d : UE Timing Advance : %d\n",i,payload_ptr[0]);
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#endif
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        //mac_xface->process_timing_advance(module_idP,payload_ptr[0]);
        payload_ptr++;
        break;
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      case DRX_CMD:
#ifdef DEBUG_HEADER_PARSING
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        LOG_D(MAC,"[UE] CE %d : UE DRX :",i);
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#endif
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        payload_ptr++;
        break;
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      }
  }
  for (i=0;i<num_sdu;i++) {
#ifdef DEBUG_HEADER_PARSING
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      LOG_D(MAC,"[UE] SDU %d : LCID %d, length %d\n",i,rx_lcids[i],rx_lengths[i]);
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#endif
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      if (rx_lcids[i] == CCCH) {

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          LOG_D(MAC,"[UE %d] Frame %d : DLSCH -> DL-CCCH, RRC message (eNB %d, %d bytes)\n",module_idP,frameP, eNB_index, rx_lengths[i]);
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#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
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          int j;
          for (j=0;j<rx_lengths[i];j++)
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            LOG_T(MAC,"%x.",(uint8_t)payload_ptr[j]);
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          LOG_T(MAC,"\n");
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#endif
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          mac_rrc_data_ind(module_idP,
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              frameP,
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              CCCH,
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              (uint8_t *)payload_ptr,rx_lengths[i],0,eNB_index,0);
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      }
      else if (rx_lcids[i] == DCCH) {
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          LOG_D(MAC,"[UE %d] Frame %d : DLSCH -> DL-DCCH%d, RRC message (eNB %d, %d bytes)\n", module_idP, frameP, rx_lcids[i],eNB_index,rx_lengths[i]);
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          mac_rlc_data_ind(eNB_index,
              module_idP,
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              frameP,
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              ENB_FLAG_NO,
              MBMS_FLAG_NO,
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              DCCH,
              (char *)payload_ptr,
              rx_lengths[i],
              1,
              NULL);
      }
      else if (rx_lcids[i] == DCCH1) {
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          LOG_D(MAC,"[UE %d] Frame %d : DLSCH -> DL-DCCH%d, RRC message (eNB %d, %d bytes)\n", module_idP, frameP, rx_lcids[i], eNB_index,rx_lengths[i]);
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          mac_rlc_data_ind(eNB_index,
              module_idP,
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              frameP,
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              ENB_FLAG_NO,
              MBMS_FLAG_NO,
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              DCCH1,
              (char *)payload_ptr,
              rx_lengths[i],
              1,
              NULL);
      }
      else if (rx_lcids[i] == DTCH) {
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          LOG_D(MAC,"[UE %d] Frame %d : DLSCH -> DL-DTCH%d (eNB %d, %d bytes)\n", module_idP, frameP,rx_lcids[i], eNB_index,rx_lengths[i]);
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#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
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          int j;
          for (j=0;j<rx_lengths[i];j++)
            LOG_T(MAC,"%x.",(unsigned char)payload_ptr[j]);
          LOG_T(MAC,"\n");
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#endif

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          mac_rlc_data_ind(eNB_index,
              module_idP,
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              frameP,
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              ENB_FLAG_NO,
              MBMS_FLAG_NO,
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              DTCH,
              (char *)payload_ptr,
              rx_lengths[i],
              1,
              NULL);
      }
      payload_ptr+= rx_lengths[i];
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  }
  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SEND_SDU, VCD_FUNCTION_OUT);
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  stop_meas(&UE_mac_inst[module_idP].rx_dlsch_sdu);
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}

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void ue_decode_si(module_id_t module_idP,frame_t frameP, uint8_t eNB_index, void *pdu,uint16_t len) {
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  start_meas(&UE_mac_inst[module_idP].rx_si);
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  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_DECODE_SI, VCD_FUNCTION_IN);

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  LOG_D(MAC,"[UE %d] Frame %d Sending SI to RRC (LCID Id %d,len %d)\n",module_idP,frameP,BCCH,len);
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  mac_rrc_data_ind(module_idP,
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      frameP,
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      BCCH,
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      (uint8_t *)pdu,
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      len,
      0,
      eNB_index,
      0);
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  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_DECODE_SI, VCD_FUNCTION_OUT);
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  stop_meas(&UE_mac_inst[module_idP].rx_si);
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}

#ifdef Rel10
unsigned char *parse_mch_header(unsigned char *mac_header,
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    unsigned char *num_sdu,
    unsigned char *rx_lcids,
    unsigned short *rx_lengths,
    unsigned short tb_length) {
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  unsigned char not_done=1, num_sdus=0, lcid, i;
  unsigned char *mac_header_ptr = mac_header;
  unsigned short length;

  while (not_done == 1) {
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      if (((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E == 0) {
          not_done = 0;
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      }
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      lcid = ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID;
      if (lcid < SHORT_PADDING) {// subheader for MSI, MCCH or MTCH
          if (not_done == 0) { // last MAC SDU, length is implicit
              mac_header_ptr++;
              length = tb_length- (mac_header_ptr - mac_header);
              for (i=0; i<num_sdus; i++)
                length -= rx_lengths[i];
          }
          else { // not the last MAC SDU
              if ( ((SCH_SUBHEADER_LONG *)mac_header_ptr)->F == 1) {// subheader has length of 3octets
                  //	  length = ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L;
                  length = ((((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_MSB & 0x7f ) << 8 ) | (((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_LSB & 0xff);
                  mac_header_ptr += 3;
              }
              else {// subheader has length of 2octets
                  length = ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->L;
                  mac_header_ptr += 2;
              }
          }
          rx_lcids[num_sdus] = lcid;
          rx_lengths[num_sdus] = length;
          num_sdus++;
      }
      else {// subheader for padding
          //     if (lcid == SHORT_PADDING)
          mac_header_ptr++;
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      }
  }
  *num_sdu = num_sdus;
  return(mac_header_ptr);
}

// this function is for sending mch_sdu from phy to mac
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void ue_send_mch_sdu(module_id_t module_idP, frame_t frameP, uint8_t *sdu, uint16_t sdu_len, uint8_t eNB_index, uint8_t sync_area) {
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  unsigned char num_sdu, i, *payload_ptr;
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  unsigned char rx_lcids[NB_RB_MAX];
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  unsigned short rx_lengths[NB_RB_MAX];

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  start_meas(&UE_mac_inst[module_idP].rx_mch_sdu);
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  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SEND_MCH_SDU, VCD_FUNCTION_IN);
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  LOG_D(MAC,"[UE %d] Frame %d : process the mch PDU for sync area %d \n",module_idP,frameP, sync_area);
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  LOG_D(MAC,"[UE %d] sdu: %x.%x\n", module_idP,sdu[0], sdu[1]);
  LOG_D(MAC,"[UE %d] parse_mch_header, demultiplex\n",module_idP);
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  payload_ptr = parse_mch_header(sdu, &num_sdu, rx_lcids, rx_lengths, sdu_len);
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  LOG_D(MAC,"[UE %d] parse_mch_header, found %d sdus\n",module_idP,num_sdu);
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  for (i=0; i<num_sdu; i++) {
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      if (rx_lcids[i] == MCH_SCHDL_INFO) {
          if (UE_mac_inst[module_idP].mcch_status==1) {
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              LOG_I(MAC,"[UE %d] Frame %d : MCH->MSI for sync area %d (eNB %d, %d bytes)\n",module_idP,frameP, sync_area, eNB_index, rx_lengths[i]);
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              // ??store necessary scheduling info to ue_mac_inst in order to
              // calculate exact position of interested service (for the complex case has >1 mtch)
              // set msi_status to 1
              UE_mac_inst[module_idP].msi_status = 1;
          }
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      }
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      else if (rx_lcids[i] == MCCH_LCHANID) {
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          LOG_I(MAC,"[UE %d] Frame %d : SDU %d MCH->MCCH for sync area %d (eNB %d, %d bytes)\n",module_idP,frameP, i, sync_area, eNB_index, rx_lengths[i]);
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          mac_rrc_data_ind(module_idP,
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              frameP,
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              MCCH,
              payload_ptr, rx_lengths[i], 0, eNB_index, sync_area);
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      }
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      else if (rx_lcids[i] == MTCH) {
          if (UE_mac_inst[module_idP].msi_status==1) {
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              LOG_I(MAC,"[UE %d] Frame %d : MCH->MTCH for sync area %d (eNB %d, %d bytes)\n",module_idP,frameP, sync_area, eNB_index, rx_lengths[i]);
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              mac_rlc_data_ind(
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                  0,
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                  module_idP,
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                  frameP,
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                  ENB_FLAG_NO,
                  MBMS_FLAG_YES,
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                  MTCH, /*+ (maxDRB + 3),*/
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                  (char *)payload_ptr,
                  rx_lengths[i],
                  1,
                  NULL);

          }
      } else {
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          LOG_W(MAC,"[UE %d] Frame %d : unknown sdu %d rx_lcids[%d]=%d mcch status %d eNB %d \n",
              module_idP,
              frameP,
              rx_lengths[i],
              i,
              rx_lcids[i],
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              UE_mac_inst[module_idP].mcch_status, eNB_index);
      }

      payload_ptr += rx_lengths[i];
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  }

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  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SEND_MCH_SDU, VCD_FUNCTION_OUT);
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  stop_meas(&UE_mac_inst[module_idP].rx_mch_sdu);
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}

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int8_t ue_get_mbsfn_sf_alloction (module_id_t module_idP, uint8_t mbsfn_sync_area, unsigned char eNB_index){
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  // currently there is one-to-one mapping between sf allocation pattern and sync area
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  if (mbsfn_sync_area > MAX_MBSFN_AREA){
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      LOG_W(MAC,"[UE %d] MBSFN synchronization area %d out of range for eNB %d\n ", module_idP, mbsfn_sync_area, eNB_index);
      return -1;
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  }
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  else if (UE_mac_inst[module_idP].mbsfn_SubframeConfig[mbsfn_sync_area] != NULL)
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    return mbsfn_sync_area;
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  else {
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      LOG_W(MAC,"[UE %d] MBSFN Subframe Config pattern %d not found \n ", module_idP, mbsfn_sync_area);
      return -1;
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  }
}
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int ue_query_mch(module_id_t module_idP, uint32_t frameP, uint32_t subframe, uint8_t eNB_index,uint8_t *sync_area, uint8_t *mcch_active) {
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  int i=0, j=0, ii=0, msi_pos=0, mcch_mcs = - 1;
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  int mcch_flag=0, mtch_flag=0, msi_flag=0;
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  int mbsfn_period = 0;// 1<<(UE_mac_inst[module_idP].mbsfn_SubframeConfig[0]->radioframeAllocationPeriod);
  int mcch_period = 0;// 32<<(UE_mac_inst[module_idP].mbsfn_AreaInfo[0]->mcch_Config_r9.mcch_RepetitionPeriod_r9);
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  int mch_scheduling_period = -1;
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  start_meas(&UE_mac_inst[module_idP].ue_query_mch);

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  if (UE_mac_inst[module_idP].pmch_Config[0])
    mch_scheduling_period = 8<<(UE_mac_inst[module_idP].pmch_Config[0]->mch_SchedulingPeriod_r9);
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  for (i=0;
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      i< UE_mac_inst[module_idP].num_active_mbsfn_area;
      i++ ){
      // assume, that there is always a mapping
      if ((j=ue_get_mbsfn_sf_alloction(module_idP,i,eNB_index)) == -1)
        return -1; // continue;
      ii=0;
      msi_pos=0;
      mbsfn_period = 1<<(UE_mac_inst[module_idP].mbsfn_SubframeConfig[0]->radioframeAllocationPeriod);
      mcch_period = 32<<(UE_mac_inst[module_idP].mbsfn_AreaInfo[0]->mcch_Config_r9.mcch_RepetitionPeriod_r9);

      LOG_D(MAC,"[UE %d] Frame %d subframe %d: Checking MBSFN Sync Area %d/%d with SF allocation %d/%d for MCCH and MTCH (mbsfn period %d, mcch period %d,mac sched period (%d,%d))\n",
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          module_idP,frameP, subframe,i,UE_mac_inst[module_idP].num_active_mbsfn_area,
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          j,UE_mac_inst[module_idP].num_sf_allocation_pattern,mbsfn_period,mcch_period,
          mch_scheduling_period,UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->radioframeAllocationOffset);

      // get the real MCS value
      switch (UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.signallingMCS_r9) {
      case 0:
        mcch_mcs = 2;
        break;
      case 1:
        mcch_mcs = 7;
        break;
      case 2:
        mcch_mcs = 13;
        break;
      case 3:
        mcch_mcs = 19;
        break;
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      }
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      if (frameP % mbsfn_period == UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->radioframeAllocationOffset){ // MBSFN frameP
          if (UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.present == MBSFN_SubframeConfig__subframeAllocation_PR_oneFrame){// one-frameP format
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              if (UE_mac_inst[module_idP].pmch_Config[0]) {
                  //  Find the first subframe in this MCH to transmit MSI
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                  if (frameP % mch_scheduling_period == UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->radioframeAllocationOffset ) {
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                      while (ii == 0) {
                          ii = UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & (0x80>>msi_pos);
                          msi_pos++;
                      }
                  }
              }

              // Check if the subframe is for MSI, MCCH or MTCHs and Set the correspoding flag to 1
              switch (subframe) {
              case 1:
                if (mac_xface->lte_frame_parms->frame_type == FDD) {
                    if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF1) == MBSFN_FDD_SF1) {
                        if (msi_pos == 1)
                          msi_flag = 1;
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                        if ( (frameP % mcch_period == UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
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                            ((UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF1) == MBSFN_FDD_SF1) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 2:
                if (mac_xface->lte_frame_parms->frame_type == FDD){
                    if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF2) == MBSFN_FDD_SF2) {
                        if (msi_pos == 2)
                          msi_flag = 1;
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                        if ( (frameP % mcch_period == UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
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                            ((UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF2) == MBSFN_FDD_SF2) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 3:
                if (mac_xface->lte_frame_parms->frame_type == TDD){// TDD
                    if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF3) == MBSFN_TDD_SF3) {
                        if (msi_pos == 1)
                          msi_flag = 1;
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                        if ( (frameP % mcch_period == UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
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                            ((UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF3) == MBSFN_TDD_SF3) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                else {// FDD
                    if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF3) == MBSFN_FDD_SF3) {
                        if (msi_pos == 3)
                          msi_flag = 1;
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                        if ((frameP % mcch_period == UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
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                            ((UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF3) == MBSFN_FDD_SF3) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 4:
                if (mac_xface->lte_frame_parms->frame_type == TDD){
                    if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF4) == MBSFN_TDD_SF4) {
                        if (msi_pos == 2)
                          msi_flag = 1;
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                        if ((frameP % mcch_period == UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
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                            ((UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF4) == MBSFN_TDD_SF4) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 6:
                if (mac_xface->lte_frame_parms->frame_type == FDD){
                    if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF6) == MBSFN_FDD_SF6) {
                        if (msi_pos == 4)
                          msi_flag = 1;
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                        if ((frameP % mcch_period == UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
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                            ((UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF6) == MBSFN_FDD_SF6) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 7:
                if (mac_xface->lte_frame_parms->frame_type == TDD){ // TDD
                    if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF7) == MBSFN_TDD_SF7) {
                        if (msi_pos == 3)
                          msi_flag = 1;
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                        if ((frameP % mcch_period == UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
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                            ((UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF7) == MBSFN_TDD_SF7) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                else {// FDD
                    if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF7) == MBSFN_FDD_SF7) {
                        if (msi_pos == 5)
                          msi_flag = 1;
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                        if ((frameP % mcch_period == UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
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                            ((UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF7) == MBSFN_FDD_SF7) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 8:
                if (mac_xface->lte_frame_parms->frame_type == TDD){ //TDD
                    if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF8) == MBSFN_TDD_SF8) {
                        if (msi_pos == 4)
                          msi_flag = 1;
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                        if ( (frameP % mcch_period == UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
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                            ((UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF8) == MBSFN_TDD_SF8) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                else{ // FDD
                    if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF8) == MBSFN_FDD_SF8) {
                        if (msi_pos == 6)
                          msi_flag = 1;
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                        if ((frameP % mcch_period == UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
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                            ((UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF8) == MBSFN_FDD_SF8) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;

              case 9:
                if (mac_xface->lte_frame_parms->frame_type == TDD){
                    if ((UE_mac_inst[module_idP].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF9) == MBSFN_TDD_SF9) {
                        if (msi_pos == 5)
                          msi_flag = 1;
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                        if ((frameP % mcch_period == UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
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                            ((UE_mac_inst[module_idP].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF9) == MBSFN_TDD_SF9) )
                          mcch_flag = 1;
                        mtch_flag = 1;
                    }
                }
                break;
              }// end switch
              // sf allocation is non-overlapping
              if ((msi_flag==1) || (mcch_flag==1) || (mtch_flag==1)){
                  LOG_D(MAC,"[UE %d] Frame %d Subframe %d: sync area %d SF alloc %d: msi flag %d, mcch flag %d, mtch flag %d\n",
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                      module_idP, frameP, subframe,i,j,msi_flag,mcch_flag,mtch_flag);
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                  *sync_area=i;
                  break;
              }
          }
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          else {// four-frameP format
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          }
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      }
  } // end of for
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  stop_meas(&UE_mac_inst[module_idP].ue_query_mch);
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  if ( (mcch_flag==1))// || (msi_flag==1))
    *mcch_active=1;

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  if ( (mcch_flag==1) || ((msi_flag==1) && (UE_mac_inst[module_idP].mcch_status==1)) ){
      return mcch_mcs;
  } else if ((mtch_flag==1) && (UE_mac_inst[module_idP].msi_status==1))
    return UE_mac_inst[module_idP].pmch_Config[0]->dataMCS_r9;
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  else
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    return -1;
}

#endif

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unsigned char generate_ulsch_header(uint8_t *mac_header,
    uint8_t num_sdus,
    uint8_t short_padding,
    uint16_t *sdu_lengths,
    uint8_t *sdu_lcids,
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    POWER_HEADROOM_CMD *power_headroom,
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    uint16_t *crnti,
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    BSR_SHORT *truncated_bsr,
    BSR_SHORT *short_bsr,
    BSR_LONG *long_bsr,
    unsigned short post_padding) {
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  SCH_SUBHEADER_FIXED *mac_header_ptr = (SCH_SUBHEADER_FIXED *)mac_header;
  unsigned char first_element=0,last_size=0,i;
  unsigned char mac_header_control_elements[16],*ce_ptr;

  LOG_D(MAC,"[UE] Generate ULSCH : num_sdus %d\n",num_sdus);
#ifdef DEBUG_HEADER_PARSING
  for (i=0;i<num_sdus;i++)
    LOG_T(MAC,"[UE] sdu %d : lcid %d length %d",i,sdu_lcids[i],sdu_lengths[i]);
  LOG_T(MAC,"\n");
#endif
  ce_ptr = &mac_header_control_elements[0];

  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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  }
  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 (power_headroom) {
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      if (first_element>0) {
          mac_header_ptr->E = 1;
          mac_header_ptr++;
      }
      else {
          first_element=1;
      }
      mac_header_ptr->R = 0;
      mac_header_ptr->E    = 0;
      mac_header_ptr->LCID = POWER_HEADROOM;
      last_size=1;
      *((POWER_HEADROOM_CMD *)ce_ptr)=(*power_headroom);
      ce_ptr+=sizeof(POWER_HEADROOM_CMD);
      LOG_D(MAC, "phr header size %d\n",sizeof(POWER_HEADROOM_CMD));
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  }

  if (crnti) {
#ifdef DEBUG_HEADER_PARSING
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      LOG_D(MAC,"[UE] CRNTI : %x (first_element %d)\n",*crnti,first_element);
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#endif
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      if (first_element>0) {
          mac_header_ptr->E = 1;
          mac_header_ptr++;
      }
      else {
          first_element=1;
      }
      mac_header_ptr->R    = 0;
      mac_header_ptr->E    = 0;
      mac_header_ptr->LCID = CRNTI;
      last_size=1;
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      *((uint16_t *)ce_ptr)=(*crnti);
      ce_ptr+=sizeof(uint16_t);
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      //    printf("offset %d\n",ce_ptr-mac_header_control_elements);
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  }

  if (truncated_bsr) {
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      if (first_element>0) {
          mac_header_ptr->E = 1;
          /*
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      printf("last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
	     ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
	     ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
	     ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
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           */
          mac_header_ptr++;
      }
      else {
          first_element=1;
      }
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#ifdef DEBUG_HEADER_PARSING
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      LOG_D(MAC,"[UE] Scheduler Truncated BSR Header\n");
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#endif
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      mac_header_ptr->R = 0;
      mac_header_ptr->E    = 0;
      mac_header_ptr->LCID = TRUNCATED_BSR;
      last_size=1;
      *((BSR_TRUNCATED *)ce_ptr)=(*truncated_bsr);
      ce_ptr+=sizeof(BSR_TRUNCATED);

      //    printf("(cont_res) : offset %d\n",ce_ptr-mac_header_control_elements);
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  }
  else if (short_bsr) {
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      if (first_element>0) {
          mac_header_ptr->E = 1;
          /*
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      printf("last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
	     ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
	     ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
	     ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
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           */
          mac_header_ptr++;
      }
      else {
          first_element=1;
      }
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#ifdef DEBUG_HEADER_PARSING
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      LOG_D(MAC,"[UE] Scheduler SHORT BSR Header\n");
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#endif
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      mac_header_ptr->R = 0;
      mac_header_ptr->E    = 0;
      mac_header_ptr->LCID = SHORT_BSR;
      last_size=1;
      *((BSR_SHORT *)ce_ptr)=(*short_bsr);
      ce_ptr+=sizeof(BSR_SHORT);

      //    printf("(cont_res) : offset %d\n",ce_ptr-mac_header_control_elements);
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  }
  else if (long_bsr) {
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      if (first_element>0) {
          mac_header_ptr->E = 1;
          /*
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      printf("last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
	     ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
	     ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
	     ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
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           */
          mac_header_ptr++;
      }
      else {
          first_element=1;
      }
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#ifdef DEBUG_HEADER_PARSING
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      LOG_D(MAC,"[UE] Scheduler Long BSR Header\n");
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#endif
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      mac_header_ptr->R = 0;
      mac_header_ptr->E    = 0;
      mac_header_ptr->LCID = LONG_BSR;
      last_size=1;

      *(ce_ptr)     = (long_bsr->Buffer_size0 << 2) | ((long_bsr->Buffer_size1 & 0x30) >> 4);
      *(ce_ptr + 1) = ((long_bsr->Buffer_size1 & 0x0F) << 4) | ((long_bsr->Buffer_size2 & 0x3C) >> 2);
      *(ce_ptr + 2) = ((long_bsr->Buffer_size2 & 0x03) << 2) | (long_bsr->Buffer_size3 & 0x3F);
      /* Padding */
      *(ce_ptr + 3) = 0;
      ce_ptr += BSR_LONG_SIZE;

      //    printf("(cont_res) : offset %d\n",ce_ptr-mac_header_control_elements);
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  }
  //  printf("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);

  for (i=0;i<num_sdus;i++) {
#ifdef DEBUG_HEADER_PARSING
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      LOG_T(MAC,"[UE] sdu subheader %d (lcid %d, %d bytes)\n",i,sdu_lcids[i],sdu_lengths[i]);
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#endif
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      if ((first_element>0)) {
          mac_header_ptr->E = 1;
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#ifdef DEBUG_HEADER_PARSING
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          LOG_D(MAC,"[UE] 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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#endif
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          mac_header_ptr+=last_size;
          //      printf("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
      }
      else {
          first_element=1;
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      }
      if (sdu_lengths[i] < 128) {
          ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->R    = 0; // 3
          ((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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#ifdef DEBUG_HEADER_PARSING
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          LOG_D(MAC,"[UE] short sdu\n");
          LOG_T(MAC,"[UE] last subheader : %x (R%d,E%d,LCID%d,F%d,L%d)\n",
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              ((uint16_t*)mac_header_ptr)[0],
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              ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->R,
              ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->E,
              ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->LCID,
              ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->F,
              ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->L);
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#endif
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      }
      else {
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->R    = 0;
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->E    = 0;
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->F    = 1;
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->LCID = sdu_lcids[i];
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_MSB    = ((unsigned short) sdu_lengths[i]>>8)&0x7f;
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_LSB    = (unsigned short) sdu_lengths[i]&0xff;
          ((SCH_SUBHEADER_LONG *)mac_header_ptr)->padding  = 0x00;
          last_size=3;
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#ifdef DEBUG_HEADER_PARSING
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          LOG_D(MAC,"[UE] long sdu\n");
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#endif
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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++;
      //mac_header_ptr=last_size; // FIXME: should be ++
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  }
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  if ((ce_ptr-mac_header_control_elements) > 0) {
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      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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  }
#ifdef DEBUG_HEADER_PARSING
  LOG_T(MAC," [UE %d] header : ", crnti);
  for (i=0;i<((unsigned char*)mac_header_ptr - mac_header);i++)
    LOG_T(MAC,"%2x.",mac_header[i]);
  LOG_T(MAC,"\n");
#endif
  return((unsigned char*)mac_header_ptr - mac_header);

}

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void ue_get_sdu(module_id_t module_idP,frame_t frameP,sub_frame_t subframe, uint8_t eNB_index,uint8_t *ulsch_buffer,uint16_t buflen, uint8_t *access_mode) {
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  mac_rlc_status_resp_t rlc_status;
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  uint8_t dcch_header_len=0,dcch1_header_len=0,dtch_header_len=0;
  uint8_t dcch_header_len_tmp=0, dtch_header_len_tmp=0;
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  uint8_t bsr_header_len=0, bsr_ce_len=0, bsr_len=0;
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  uint8_t phr_header_len=0, phr_ce_len=0,phr_len=0;
  uint16_t sdu_lengths[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
  uint8_t sdu_lcids[8]    = { 0, 0, 0, 0, 0, 0, 0, 0 };
  uint8_t payload_offset=0,num_sdus=0;
  uint8_t ulsch_buff[MAX_ULSCH_PAYLOAD_BYTES];
  uint16_t sdu_length_total=0;
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  BSR_SHORT bsr_short;
  BSR_LONG bsr_long;
  BSR_SHORT *bsr_s=&bsr_short;
  BSR_LONG  *bsr_l=&bsr_long;
  POWER_HEADROOM_CMD phr;
  POWER_HEADROOM_CMD *phr_p=&phr;
  unsigned short short_padding=0, post_padding=0;
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  int lcgid;
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  int j; // used for padding
  // Compute header length

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  start_meas(&UE_mac_inst[module_idP].tx_ulsch_sdu);
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  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_GET_SDU, VCD_FUNCTION_IN);

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#ifdef CBA
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  if (*access_mode==CBA_ACCESS){
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      LOG_D(MAC,"[UE %d] frameP %d subframe %d try CBA transmission\n",
          module_idP, frameP, subframe);
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      //if (UE_mac_inst[module_idP].scheduling_info.LCID_status[DTCH] == LCID_EMPTY)
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      if (use_cba_access(module_idP,frameP,subframe,eNB_index)==0){
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          *access_mode=POSTPONED_ACCESS;
          vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_GET_SDU, VCD_FUNCTION_OUT);
          return;
      }
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      LOG_D(MAC,"[UE %d] frameP %d subframe %d CBA transmission oppurtunity, tbs %d\n",
          module_idP, frameP, subframe,buflen);
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  }
#endif
  dcch_header_len=2;//sizeof(SCH_SUBHEADER_SHORT);
  dcch1_header_len=2;//sizeof(SCH_SUBHEADER_SHORT);
  // hypo length,in case of long header skip the padding byte
  dtch_header_len=(buflen > 128 ) ? 3 : 2 ; //sizeof(SCH_SUBHEADER_LONG)-1 : sizeof(SCH_SUBHEADER_SHORT);
  bsr_header_len = 1;//sizeof(SCH_SUBHEADER_FIXED);
  phr_header_len = 1;//sizeof(SCH_SUBHEADER_FIXED);
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  phr_ce_len = (UE_mac_inst[module_idP].PHR_reporting_active == 1) ? 1 /* sizeof(POWER_HEADROOM_CMD)*/: 0;
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  if (phr_ce_len > 0){
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      phr_len = phr_ce_len + phr_header_len;
      LOG_D(MAC,"[UE %d] header size info: PHR len %d (ce%d,hdr%d) buff_len %d\n",
          module_idP, phr_len, phr_ce_len, phr_header_len, buflen);
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  }else
    phr_len=0;
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  bsr_ce_len = get_bsr_len (module_idP, buflen-phr_len);
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  if (bsr_ce_len > 0 ){
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      bsr_len = bsr_ce_len + bsr_header_len;
      LOG_D(MAC,"[UE %d] header size info: dcch %d, dcch1 %d, dtch %d, bsr (ce%d,hdr%d) buff_len %d\n",
          module_idP, dcch_header_len,dcch1_header_len,dtch_header_len, bsr_ce_len, bsr_header_len, buflen);
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  } else
    bsr_len = 0;
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  // check for UL bandwidth requests and add SR control element
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  // Check for DCCH first
  sdu_lengths[0]=0;
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  if (UE_mac_inst[module_idP].scheduling_info.LCID_status[DCCH] == LCID_NOT_EMPTY) {

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      rlc_status = mac_rlc_status_ind(0, module_idP,frameP,ENB_FLAG_NO,MBMS_FLAG_NO,
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          DCCH,
          (buflen-dcch_header_len-bsr_len-phr_len));
      LOG_D(MAC, "[UE %d] Frame %d : UL-DCCH -> ULSCH, RRC message has %d bytes to "
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          "send (Transport Block size %d, mac header len %d)\n",
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          module_idP,frameP, rlc_status.bytes_in_buffer,buflen,dcch_header_len);
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      sdu_lengths[0] += mac_rlc_data_req(0, module_idP,frameP,ENB_FLAG_NO, MBMS_FLAG_NO,
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          DCCH,
          (char *)&ulsch_buff[sdu_lengths[0]]);

      sdu_length_total += sdu_lengths[0];
      sdu_lcids[0] = DCCH;
      LOG_D(MAC,"[UE %d] TX Got %d bytes for DCCH\n",module_idP,sdu_lengths[0]);
      num_sdus = 1;
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      update_bsr(module_idP, frameP, DCCH, UE_mac_inst[module_idP].scheduling_info.LCGID[DCCH]);
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      //header_len +=2;
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  }
  else {
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      dcch_header_len=0;
      num_sdus = 0;
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  }

  // DCCH1
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  if (UE_mac_inst[module_idP].scheduling_info.LCID_status[DCCH1] == LCID_NOT_EMPTY) {
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      rlc_status = mac_rlc_status_ind(0, module_idP,frameP,ENB_FLAG_NO,MBMS_FLAG_NO,
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          DCCH1,
          (buflen-bsr_len-phr_len-dcch_header_len-dcch1_header_len-sdu_length_total));
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      LOG_D(MAC,"[UE %d] Frame %d : UL-DCCH1 -> ULSCH, RRC message has %d bytes to"
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          " send (Transport Block size %d, mac header len %d)\n",
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          module_idP,frameP, rlc_status.bytes_in_buffer,buflen,dcch1_header_len);
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      sdu_lengths[num_sdus] = mac_rlc_data_req(0, module_idP,frameP,ENB_FLAG_NO,MBMS_FLAG_NO,
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          DCCH1,
          (char *)&ulsch_buff[sdu_lengths[0]]);
      sdu_length_total += sdu_lengths[num_sdus];
      sdu_lcids[num_sdus] = DCCH1;
      LOG_D(MAC,"[UE %d] TX Got %d bytes for DCCH1\n",module_idP,sdu_lengths[num_sdus]);
      num_sdus++;
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      //update_bsr(module_idP, frameP, DCCH1);
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      //dcch_header_len +=2; // include dcch1
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  }
  else {
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      dcch1_header_len =0;
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  }

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  if ((UE_mac_inst[module_idP].scheduling_info.LCID_status[DTCH] == LCID_NOT_EMPTY) &&
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      ((bsr_len+phr_len+dcch_header_len+dcch1_header_len+dtch_header_len+sdu_length_total) <= buflen)){

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      // optimize the dtch header lenght
      //if ((UE_mac_inst[module_idP].scheduling_info.BSR_bytes[DTCH] > 128) &&
      /*   if (((UE_mac_inst[module_idP].scheduling_info.BSR_bytes[DTCH] >= 128) &&
	((UE_mac_inst[module_idP].scheduling_info.BSR_bytes[DTCH]+bsr_len+phr_len+dcch_header_len+dcch1_header_len+dtch_header_len) > buflen)&&
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	 buflen >=128 ))
      dtch_header_len = 3;//sizeof(SCH_SUBHEADER_LONG);
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    else
1158
      dtch_header_len = 2;//sizeof(SCH_SUBHEADER_SHORT);
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       */
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      rlc_status = mac_rlc_status_ind(0, module_idP,frameP,ENB_FLAG_NO,MBMS_FLAG_NO,
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          DTCH,
          buflen-bsr_len-phr_len-dcch_header_len-dcch1_header_len-dtch_header_len-sdu_length_total);

      LOG_D(MAC,"[UE %d] Frame %d : UL-DTCH -> ULSCH, %d bytes to send (Transport Block size %d, mac header len %d, BSR byte[DTCH] %d)\n",
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          module_idP,frameP, rlc_status.bytes_in_buffer,buflen,dtch_header_len,
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          UE_mac_inst[module_idP].scheduling_info.BSR_bytes[DTCH]);

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      sdu_lengths[num_sdus] = mac_rlc_data_req(0, module_idP,frameP, ENB_FLAG_NO, MBMS_FLAG_NO,
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          DTCH,
          (char *)&ulsch_buff[sdu_length_total]);

      //adjust dtch header
      dtch_header_len = (sdu_lengths[num_sdus] >= 128) ? 3 : 2;
      LOG_D(MAC,"[UE %d] TX Got %d bytes for DTCH\n",module_idP,sdu_lengths[num_sdus]);
      sdu_lcids[num_sdus] = DTCH;
      sdu_length_total += sdu_lengths[num_sdus];
      num_sdus++;
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      UE_mac_inst[module_idP].ul_active = update_bsr(module_idP, frameP, DTCH, UE_mac_inst[module_idP].scheduling_info.LCGID[DTCH]);
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  }
  else { // no rlc pdu : generate the dummy header
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      dtch_header_len = 0;
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  }
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  lcgid= get_bsr_lcgid(module_idP);
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  if (lcgid < 0 ) {
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      bsr_s = NULL;
      bsr_l = NULL ;
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  } else if ((lcgid ==MAX_NUM_LCGID) && (bsr_ce_len == sizeof(BSR_LONG))) {
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      bsr_s = NULL;
      bsr_l->Buffer_size0 = UE_mac_inst[module_idP].scheduling_info.BSR[LCGID0];
      bsr_l->Buffer_size1 = UE_mac_inst[module_idP].scheduling_info.BSR[LCGID1];
      bsr_l->Buffer_size2 = UE_mac_inst[module_idP].scheduling_info.BSR[LCGID2];
      bsr_l->Buffer_size3 = UE_mac_inst[module_idP].scheduling_info.BSR[LCGID3];
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      LOG_D(MAC, "[UE %d] Frame %d report long BSR (level LCGID0 %d,level LCGID1 %d,level LCGID2 %d,level LCGID3 %d)\n", module_idP,frameP,
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          UE_mac_inst[module_idP].scheduling_info.BSR[LCGID0],
          UE_mac_inst[module_idP].scheduling_info.BSR[LCGID1],
          UE_mac_inst[module_idP].scheduling_info.BSR[LCGID2],
          UE_mac_inst[module_idP].scheduling_info.BSR[LCGID3]);
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  } else if (bsr_ce_len == sizeof(BSR_SHORT)) {
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      bsr_l = NULL;
      bsr_s->LCGID = lcgid;
      bsr_s->Buffer_size = UE_mac_inst[module_idP].scheduling_info.BSR[lcgid];
      LOG_D(MAC,"[UE %d] Frame %d report SHORT BSR with level %d for LCGID %d\n",
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          module_idP, frameP, UE_mac_inst[module_idP].scheduling_info.BSR[lcgid],lcgid);
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  } else {
      bsr_s = NULL;
      bsr_l = NULL;
  }

1211
  // build PHR and update the timers
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  if (phr_ce_len == sizeof(POWER_HEADROOM_CMD)){
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      phr_p->PH = get_phr_mapping(module_idP,eNB_index);
      phr_p->R  = 0;
      LOG_D(MAC,"[UE %d] Frame %d report PHR with mapping (%d->%d) for LCID %d\n",
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          module_idP,frameP, mac_xface->get_PHR(module_idP,eNB_index), phr_p->PH,POWER_HEADROOM);
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      update_phr(module_idP);
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  }else
    phr_p=NULL;

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  LOG_T(MAC,"[UE %d] Frame %d: bsr s %p bsr_l %p, phr_p %p\n",  module_idP,frameP,bsr_s, bsr_l, phr_p);
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1223
  // adjust the header length
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  dcch_header_len_tmp = dcch_header_len;
  dtch_header_len_tmp = dtch_header_len;
  if (dtch_header_len==0)
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    dcch_header_len = (dcch_header_len>0)? 1: dcch_header_len;
  else
    dtch_header_len= (dtch_header_len >0)? 1: dtch_header_len;   // for short and long, cut the length+F fields
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  if ((buflen-bsr_len-phr_len-dcch_header_len-dcch1_header_len-dtch_header_len-sdu_length_total) <= 2) {
      short_padding = buflen-bsr_len-phr_len-dcch_header_len-dcch1_header_len-dtch_header_len-sdu_length_total;
      post_padding = 0;
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  }
  else {
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      if ((buflen-bsr_len-phr_len-dcch_header_len-dcch1_header_len-dtch_header_len-sdu_length_total) == buflen) {
            *access_mode=CANCELED_ACCESS;
      }
      short_padding = 0;
      if (dtch_header_len==0)
        dcch_header_len = dcch_header_len_tmp;
      else
        dtch_header_len= dtch_header_len_tmp;

      post_padding = buflen-bsr_len-phr_len-dcch_header_len-dcch1_header_len-dtch_header_len-sdu_length_total -1 ;
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  }
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1248 1249
  // Generate header
  // if (num_sdus>0) {
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  payload_offset = generate_ulsch_header(ulsch_buffer,  // mac header
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      num_sdus,      // num sdus
      short_padding,            // short pading
      sdu_lengths,  // sdu length
      sdu_lcids,    // sdu lcid
      phr_p,  // power headroom
      NULL,  // crnti
      NULL,  // truncated bsr
      bsr_s, // short bsr
      bsr_l,
      post_padding); // long_bsr
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  LOG_I(MAC,"[UE %d] Generate header :bufflen %d  sdu_length_total %d, num_sdus %d, sdu_lengths[0] %d, sdu_lcids[0] %d => payload offset %d,  dcch_header_len %d, dtch_header_len %d, padding %d,post_padding %d, bsr len %d, phr len %d, reminder %d \n",
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      module_idP,buflen, sdu_length_total,num_sdus,sdu_lengths[0],sdu_lcids[0],payload_offset, dcch_header_len,  dtch_header_len,
      short_padding,post_padding, bsr_len, phr_len,buflen-sdu_length_total-payload_offset);
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  // cycle through SDUs and place in ulsch_buffer
  memcpy(&ulsch_buffer[payload_offset],ulsch_buff,sdu_length_total);
  // fill remainder of DLSCH with random data
  for (j=0;j<(buflen-sdu_length_total-payload_offset);j++)
    ulsch_buffer[payload_offset+sdu_length_total+j] = (char)(taus()&0xff);

#if defined(USER_MODE) && defined(OAI_EMU)
  if (oai_emulation.info.opt_enabled)
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    trace_pdu(0, ulsch_buffer, buflen, module_idP, 3, UE_mac_inst[module_idP].crnti, subframe, 0, 0);
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  LOG_D(OPT,"[UE %d][ULSCH] Frame %d trace pdu for rnti %x  with size %d\n",
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      module_idP, frameP, UE_mac_inst[module_idP].crnti, buflen);
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#endif
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  LOG_D(MAC,"[UE %d][SR] Gave SDU to PHY, clearing any scheduling request\n",
      module_idP,payload_offset, sdu_length_total);
  UE_mac_inst[module_idP].scheduling_info.SR_pending=0;
  UE_mac_inst[module_idP].scheduling_info.SR_COUNTER=0;
  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_GET_SDU, VCD_FUNCTION_OUT);
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    stop_meas(&UE_mac_inst[module_idP].tx_ulsch_sdu);
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}

// called at each subframe
// Performs :
// 1. Trigger PDCP every 5ms
// 2. Call RRC for link status return to PHY
// 3. Perform SR/BSR procedures for scheduling feedback
// 4. Perform PHR procedures

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UE_L2_STATE_t ue_scheduler(module_id_t module_idP,frame_t frameP, sub_frame_t subframeP, lte_subframe_t directionP,uint8_t eNB_indexP) {
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  int lcid; // lcid index
  int TTI= 1;
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  int bucketsizeduration = -1;
  int bucketsizeduration_max = -1;
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  // mac_rlc_status_resp_t rlc_status[MAX_NUM_LCGID]; // 4
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  // int8_t lcg_id;
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  struct RACH_ConfigCommon *rach_ConfigCommon = (struct RACH_ConfigCommon *)NULL;
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#ifdef EXMIMO
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  int ret;
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#endif
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#if defined(ENABLE_ITTI)
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  MessageDef   *msg_p;
  const char   *msg_name;
  instance_t    instance;
  int           result;
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#endif
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  start_meas(&UE_mac_inst[module_idP].ue_scheduler);
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  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SCHEDULER, VCD_FUNCTION_IN);

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#if defined(ENABLE_ITTI)
  do {
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      // Checks if a message has been sent to MAC sub-task
      itti_poll_msg (TASK_MAC_UE, &msg_p);
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      if (msg_p != NULL) {
          msg_name = ITTI_MSG_NAME (msg_p);
          instance = ITTI_MSG_INSTANCE (msg_p);
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          switch (ITTI_MSG_ID(msg_p)) {
          case RRC_MAC_CCCH_DATA_REQ:
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            LOG_I(MAC, "Received %s from %s: instance %d, frameP %d, eNB_index %d\n",
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                msg_name, ITTI_MSG_ORIGIN_NAME(msg_p), instance,
                RRC_MAC_CCCH_DATA_REQ (msg_p).frame, RRC_MAC_CCCH_DATA_REQ (msg_p).enb_index);

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            // TODO process CCCH data req.
            break;
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          default:
            LOG_E(MAC, "Received unexpected message %s\n", msg_name);
            break;
          }
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          result = itti_free (ITTI_MSG_ORIGIN_ID(msg_p), msg_p);
          AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
      }
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  } while(msg_p != NULL);
#endif

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  //Mac_rlc_xface->frameP=frameP;
  //Rrc_xface->Frame_index=Mac_rlc_xface->frameP;
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  //if (subframe%5 == 0)
#ifdef EXMIMO
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  pdcp_run(frameP, 0, module_idP, eNB_indexP);
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#endif
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  UE_mac_inst[module_idP].frame = frameP;
  UE_mac_inst[module_idP].subframe = subframeP;
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#ifdef CELLULAR
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  rrc_rx_tx(module_idP, frameP, 0, eNB_indexP);
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#else
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  switch (rrc_rx_tx(module_idP,
      frameP,
      0,
      eNB_indexP)) {
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  case RRC_OK:
    break;
  case RRC_ConnSetup_failed:
    LOG_E(MAC,"RRCConnectionSetup failed, returning to IDLE state\n");
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    vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SCHEDULER, VCD_FUNCTION_OUT);
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    stop_meas(&UE_mac_inst[module_idP].ue_scheduler);
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    return(CONNECTION_LOST);
    break;
  case RRC_PHY_RESYNCH:
    LOG_E(MAC,"RRC Loss of synch, returning PHY_RESYNCH\n");
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    vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SCHEDULER, VCD_FUNCTION_OUT);
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    stop_meas(&UE_mac_inst[module_idP].ue_scheduler);
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    return(PHY_RESYNCH);
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  case RRC_Handover_failed:
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    LOG_N(MAC,"Handover failure for UE %d eNB_index %d\n",module_idP,eNB_indexP);
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    //Invalid...need to add another MAC UE state for re-connection procedure
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    mac_xface->phy_config_afterHO_ue(module_idP,eNB_indexP,(MobilityControlInfo_t *)NULL,1);
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    //return(3);
    break;
  case RRC_HO_STARTED:
    LOG_I(MAC,"RRC handover, Instruct PHY to start the contention-free PRACH and synchronization\n");
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    vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SCHEDULER, VCD_FUNCTION_OUT);
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    stop_meas(&UE_mac_inst[module_idP].ue_scheduler);
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    return(PHY_HO_PRACH);
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  default:
    break;
  }
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#endif
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  // Check Contention resolution timer (put in a function later)
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  if (UE_mac_inst[module_idP].RA_contention_resolution_timer_active == 1) {
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      if (UE_mac_inst[module_idP].radioResourceConfigCommon)
        rach_ConfigCommon = &UE_mac_inst[module_idP].radioResourceConfigCommon->rach_ConfigCommon;
      else {
          LOG_E(MAC,"FATAL: radioResourceConfigCommon is NULL!!!\n");
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	  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SCHEDULER, VCD_FUNCTION_OUT);
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	  stop_meas(&UE_mac_inst[module_idP].ue_scheduler);
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	  mac_xface->macphy_exit("");
	  //return(RRC_OK);
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      }
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      LOG_I(MAC,"Frame %d: Contention resolution timer %d/%d\n",frameP,UE_mac_inst[module_idP].RA_contention_resolution_cnt,
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          ((1+rach_ConfigCommon->ra_SupervisionInfo.mac_ContentionResolutionTimer)<<3));

      UE_mac_inst[module_idP].RA_contention_resolution_cnt++;
      if (UE_mac_inst[module_idP].RA_contention_resolution_cnt ==
          ((1+rach_ConfigCommon->ra_SupervisionInfo.mac_ContentionResolutionTimer)<<3)) {
          UE_mac_inst[module_idP].RA_active = 0;
          // Signal PHY to quit RA procedure
          LOG_E(MAC,"Contention resolution timer expired, RA failed\n");
          mac_xface->ra_failed(module_idP,eNB_indexP);
      }
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  }


  // call SR procedure to generate pending SR and BSR for next PUCCH/PUSCH TxOp.  This should implement the procedures
  // outlined in Sections 5.4.4 an 5.4.5 of 36.321
  // Put this in another function

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  // Get RLC status info and update Bj for all lcids that are active
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  for (lcid=DCCH; lcid <= DTCH; lcid++ ) {
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      if ((lcid == 0) ||(UE_mac_inst[module_idP].logicalChannelConfig[lcid])) {
          // meausre the Bj
          if ((directionP == SF_UL)&& (UE_mac_inst[module_idP].scheduling_info.Bj[lcid] >= 0)){
              if (UE_mac_inst[module_idP].logicalChannelConfig[lcid]->ul_SpecificParameters) {
                  bucketsizeduration = UE_mac_inst[module_idP].logicalChannelConfig[lcid]->ul_SpecificParameters->prioritisedBitRate * TTI;
                  bucketsizeduration_max = get_ms_bucketsizeduration(UE_mac_inst[module_idP].logicalChannelConfig[lcid]->ul_SpecificParameters->bucketSizeDuration);
              }
              else {
                  LOG_E(MAC,"[UE %d] lcid %d, NULL ul_SpecificParameters\n",module_idP,lcid);
                  mac_xface->macphy_exit("");
              }
              if ( UE_mac_inst[module_idP].scheduling_info.Bj[lcid] > bucketsizeduration_max )
                UE_mac_inst[module_idP].scheduling_info.Bj[lcid] = bucketsizeduration_max;
              else
                UE_mac_inst[module_idP].scheduling_info.Bj[lcid] = bucketsizeduration;
          }
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          if (update_bsr(module_idP,frameP, lcid, UE_mac_inst[module_idP].scheduling_info.LCGID[lcid])) {
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              UE_mac_inst[module_idP].scheduling_info.SR_pending= 1;
              LOG_D(MAC,"[UE %d][SR] Frame %d subframe %d SR for PUSCH is pending for LCGID %d with BSR level %d (%d bytes in RLC)\n",
                  module_idP, frameP,subframeP,UE_mac_inst[module_idP].scheduling_info.LCGID[lcid],
                  UE_mac_inst[module_idP].scheduling_info.BSR[UE_mac_inst[module_idP].scheduling_info.LCGID[lcid]],
                  UE_mac_inst[module_idP].scheduling_info.BSR_bytes[UE_mac_inst[module_idP].scheduling_info.LCGID[lcid]]);
          }
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      }
  }
  // UE has no valid phy config dedicated ||  no valid/released  SR
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  if ((UE_mac_inst[module_idP].physicalConfigDedicated == NULL)) {
      // cancel all pending SRs
      UE_mac_inst[module_idP].scheduling_info.SR_pending=0;
      UE_mac_inst[module_idP].ul_active=0;
      LOG_T(MAC,"[UE %d] Release all SRs \n", module_idP);
      vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SCHEDULER, VCD_FUNCTION_OUT);
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      stop_meas(&UE_mac_inst[module_idP].ue_scheduler);
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      return(CONNECTION_OK);
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  }

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  if ((UE_mac_inst[module_idP].physicalConfigDedicated->schedulingRequestConfig == NULL) ||
      (UE_mac_inst[module_idP].physicalConfigDedicated->schedulingRequestConfig->present == SchedulingRequestConfig_PR_release)){
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      // initiate RA with CRNTI included in msg3 (no contention) as descibed in 36.321 sec 5.1.5
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      // cancel all pending SRs
      UE_mac_inst[module_idP].scheduling_info.SR_pending=0;
      UE_mac_inst[module_idP].ul_active=0;
      LOG_T(MAC,"[UE %d] Release all SRs \n", module_idP);
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  }

  // Put this in a function
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  // Call PHR procedure as described in Section 5.4.6 in 36.321
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  if (UE_mac_inst[module_idP].PHR_state == MAC_MainConfig__phr_Config_PR_setup){ // normal operation
      if (UE_mac_inst[module_idP].PHR_reconfigured == 1) { // upon (re)configuration of the power headroom reporting functionality by upper layers
          UE_mac_inst[module_idP].PHR_reporting_active = 1;
          UE_mac_inst[module_idP].PHR_reconfigured = 0;
      } else {
          //LOG_D(MAC,"PHR normal operation %d active %d \n", UE_mac_inst[module_idP].scheduling_info.periodicPHR_SF, UE_mac_inst[module_idP].PHR_reporting_active);
          if ((UE_mac_inst[module_idP].scheduling_info.prohibitPHR_SF <= 0) &&
              ((mac_xface->get_PL(module_idP,eNB_indexP) <  UE_mac_inst[module_idP].scheduling_info.PathlossChange_db) ||
                  (UE_mac_inst[module_idP].power_backoff_db[eNB_indexP] > UE_mac_inst[module_idP].scheduling_info.PathlossChange_db)))
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            // trigger PHR and reset the timer later when the PHR report is sent
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            UE_mac_inst[module_idP].PHR_reporting_active = 1;
          else if (UE_mac_inst[module_idP].PHR_reporting_active ==0 )
            UE_mac_inst[module_idP].scheduling_info.prohibitPHR_SF--;
          if (UE_mac_inst[module_idP].scheduling_info.periodicPHR_SF <= 0 )
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            // trigger PHR and reset the timer later when the PHR report is sent
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            UE_mac_inst[module_idP].PHR_reporting_active = 1;
          else if (UE_mac_inst[module_idP].PHR_reporting_active == 0 )
            UE_mac_inst[module_idP].scheduling_info.periodicPHR_SF--;
      }
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  } else {    // release / nothing
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      UE_mac_inst[module_idP].PHR_reporting_active = 0; // release PHR
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  }
  //If the UE has UL resources allocated for new transmission for this TTI here:
  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SCHEDULER, VCD_FUNCTION_OUT);
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  stop_meas(&UE_mac_inst[module_idP].ue_scheduler);
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  return(CONNECTION_OK);
}

// to be improved
#ifdef CBA
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double uniform_rngen(int min, int max) {
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  double random = (double)taus()/((double)0xffffffff);
  return (max - min) * random + min;
}

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int use_cba_access(module_id_t module_idP,frame_t frameP,uint8_t subframe, uint8_t eNB_index){
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  if (( ((UE_mac_inst[module_idP].scheduling_info.BSR[LCGID1]>0)&&(UE_mac_inst[module_idP].scheduling_info.BSR[LCGID1]<64))   ||
      ((UE_mac_inst[module_idP].scheduling_info.BSR[LCGID2]>0)&&(UE_mac_inst[module_idP].scheduling_info.BSR[LCGID2]<64))   ||
      ((UE_mac_inst[module_idP].scheduling_info.BSR[LCGID3]>0)&&(UE_mac_inst[module_idP].scheduling_info.BSR[LCGID3]<64)) )
      //  && (UE_mac_inst[module_idP].ul_active == 0) // check if the ul is acrtive
      && (UE_mac_inst[module_idP].cba_last_access[0] <= 0) ) { // backoff
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      //  LOG_D(MAC,"[UE %d] Frame %d Subframe %d: the current CBA backoff is %d \n", module_idP, frameP, subframe,
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      //  UE_mac_inst[module_idP].cba_last_access[0] );

      UE_mac_inst[module_idP].cba_last_access[0]= round(uniform_rngen(1,10));
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      LOG_D(MAC,"[UE %d] Frame %d Subframe %d: start a new CBA backoff  %d UL active state %d \n", module_idP, frameP, subframe,
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          UE_mac_inst[module_idP].cba_last_access[0], UE_mac_inst[module_idP].ul_active);

      return 1;
  } else if (( ((UE_mac_inst[module_idP].scheduling_info.BSR[LCGID1]> 0 ))   ||
      ((UE_mac_inst[module_idP].scheduling_info.BSR[LCGID2]> 0 ))   ||
      ((UE_mac_inst[module_idP].scheduling_info.BSR[LCGID3]> 0 )) )
      // && (UE_mac_inst[module_idP].ul_active == 0) // check if the ul is acrtive
      && (UE_mac_inst[module_idP].cba_last_access[0]> 0) ){

      UE_mac_inst[module_idP].cba_last_access[0]-=1;
      LOG_D(MAC,"[UE %d] Frame %d Subframe %d: CBA backoff is decreased by one to %d UL active state %d \n",
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          module_idP, frameP, subframe,
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          UE_mac_inst[module_idP].cba_last_access[0], UE_mac_inst[module_idP].ul_active);

  } /*else if (( ((UE_mac_inst[module_idP].scheduling_info.BSR[LCGID1] == 0 ))   &&
	       ((UE_mac_inst[module_idP].scheduling_info.BSR[LCGID2] == 0 ))   &&
	       ((UE_mac_inst[module_idP].scheduling_info.BSR[LCGID3] ==  0 )) )
	     && (UE_mac_inst[module_idP].cba_last_access[0]> 0) ){
    UE_mac_inst[module_idP].cba_last_access[0]-=1;
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    }*/
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  return 0;
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}
#endif

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int get_bsr_lcgid (module_id_t module_idP){
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  int lcgid, lcgid_tmp=-1;
  int num_active_lcgid = 0;
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  for (lcgid = 0 ; lcgid < MAX_NUM_LCGID; lcgid++){
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      if (UE_mac_inst[module_idP].scheduling_info.BSR[lcgid] > 0 ){
          lcgid_tmp = lcgid;
          num_active_lcgid+=1;
      }
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  }
  if (num_active_lcgid == 0)
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      return -1;
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  else if (num_active_lcgid == 1)
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      return lcgid_tmp;
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  else
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      return MAX_NUM_LCGID;
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}

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uint8_t get_bsr_len (module_id_t module_idP, uint16_t buflen) {
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  int lcgid=0;
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  uint8_t bsr_len=0,  num_lcgid=0;
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  int pdu = 0;

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  for (lcgid=0; lcgid < MAX_NUM_LCGID; lcgid++ ) {
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      if (UE_mac_inst[module_idP].scheduling_info.BSR_bytes[lcgid] > 0 )
        pdu += (UE_mac_inst[module_idP].scheduling_info.BSR_bytes[lcgid] +  bsr_len + 2); //2 = sizeof(SCH_SUBHEADER_SHORT)
      if (UE_mac_inst[module_idP].scheduling_info.BSR_bytes[lcgid] > 128 ) // long header size: adjust the header size
          pdu += 1;
      // current phy buff can not transport all sdu for this lcgid -> transmit a bsr for this lcgid

      if ( (pdu > buflen) &&  (UE_mac_inst[module_idP].scheduling_info.BSR_bytes[lcgid] > 0 ) ){
          num_lcgid +=1;
          bsr_len = (num_lcgid >= 2 ) ? sizeof(BSR_LONG) :  sizeof(BSR_SHORT) ;
      }
      LOG_D(MAC,"BSR Bytes %d for lcgid %d bsr len %d num lcgid %d\n", UE_mac_inst[module_idP].scheduling_info.BSR_bytes[lcgid], lcgid, bsr_len, num_lcgid);
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  }
  if ( bsr_len > 0 )
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    LOG_D(MAC,"[UE %d] Prepare a %s (Transport Block Size %d, MAC pdu Size %d) \n",
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        module_idP, map_int_to_str(BSR_names, bsr_len), buflen, pdu);
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  return bsr_len;
}


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boolean_t  update_bsr(module_id_t module_idP, frame_t frameP, uint8_t lcid, uint8_t lcg_id){
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  mac_rlc_status_resp_t rlc_status;
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  boolean_t sr_pending = FALSE;
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  if ((lcg_id < 0) || (lcg_id > MAX_NUM_LCGID) )
    return sr_pending;
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  // fixme: need a better way to reset
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  if ((lcid == DCCH) || (lcid == DTCH)){
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      UE_mac_inst[module_idP].scheduling_info.BSR[lcg_id]=0;
      UE_mac_inst[module_idP].scheduling_info.BSR_bytes[lcg_id]=0;
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  }
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  //  for (lcid =0 ; lcid < MAX_NUM_LCID; lcid++) {
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  if (UE_mac_inst[module_idP].scheduling_info.LCGID[lcid] == lcg_id) {
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      rlc_status = mac_rlc_status_ind(0, module_idP,frameP,ENB_FLAG_NO,MBMS_FLAG_NO,
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          lcid,
          0);
      if (rlc_status.bytes_in_buffer > 0 ) {
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          sr_pending = TRUE;
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          UE_mac_inst[module_idP].scheduling_info.LCID_status[lcid] = LCID_NOT_EMPTY;
          UE_mac_inst[module_idP].scheduling_info.BSR[lcg_id] += locate (BSR_TABLE,BSR_TABLE_SIZE, rlc_status.bytes_in_buffer);
          UE_mac_inst[module_idP].scheduling_info.BSR_bytes[lcg_id] += rlc_status.bytes_in_buffer;
          // UE_mac_inst[module_idP].scheduling_info.BSR_short_lcid = lcid; // only applicable to short bsr
          LOG_D(MAC,"[UE %d] BSR level %d (LCGID %d, rlc buffer %d byte)\n",
              module_idP, UE_mac_inst[module_idP].scheduling_info.BSR[lcg_id],lcg_id,  UE_mac_inst[module_idP].scheduling_info.BSR_bytes[lcg_id]);
      }
      else
        UE_mac_inst[module_idP].scheduling_info.LCID_status[lcid]=LCID_EMPTY;
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  }
  //}
  return sr_pending;
}

1620
uint8_t locate (const uint32_t *table, int size, int value){
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  uint8_t ju, jm, jl;
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  int ascend;

  if (value == 0) return 0; //elseif (value > 150000) return 63;

  jl = 0;      // lower bound
  ju = size  ;// upper bound
  ascend = (table[ju] >= table[jl]) ? 1 : 0; // determine the order of the the table:  1 if ascending order of table, 0 otherwise

  while (ju-jl > 1) { //If we are not yet done,
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      jm = (ju+jl) >> 1; //compute a midpoint,
      if ((value >= table[jm]) == ascend)
        jl=jm; // replace the lower limit
      else
        ju=jm; //replace the upper limit
      LOG_T(MAC,"[UE] searching BSR index %d for (BSR TABLE %d < value %d)\n", jm, table[jm], value);
1638 1639 1640 1641 1642 1643
  }
  if (value == table[jl]) return jl;
  else                    return jl+1; //equally  ju

}

1644
int get_sf_periodicBSRTimer(uint8_t sf_offset){
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  switch (sf_offset) {
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf5:
    return 5;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf10:
    return 10;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf16:
    return 16;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf20:
    return 20;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf32:
    return 32;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf40:
    return 40;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf64:
    return 64;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf80:
    return 80;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf128:
    return 128;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf160:
    return 160;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf320:
    return 320;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf640:
    return 640;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf1280:
    return 1280;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_sf2560:
    return 2560;
    break;
  case MAC_MainConfig__ul_SCH_Config__periodicBSR_Timer_infinity:
  default:
    return -1;
    break;
  }
}

1696
int get_sf_retxBSRTimer(uint8_t sf_offset){
1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721

  switch (sf_offset) {
  case MAC_MainConfig__ul_SCH_Config__retxBSR_Timer_sf320:
    return 320;
    break;
  case MAC_MainConfig__ul_SCH_Config__retxBSR_Timer_sf640:
    return 640;
    break;
  case MAC_MainConfig__ul_SCH_Config__retxBSR_Timer_sf1280:
    return 1280;
    break;
  case MAC_MainConfig__ul_SCH_Config__retxBSR_Timer_sf2560:
    return 2560;
    break;
  case MAC_MainConfig__ul_SCH_Config__retxBSR_Timer_sf5120:
    return 5120;
    break;
  case MAC_MainConfig__ul_SCH_Config__retxBSR_Timer_sf10240:
    return 10240;
    break;
  default:
    return -1;
    break;
  }
}
1722
int get_ms_bucketsizeduration(uint8_t bucketsizeduration){
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  switch (bucketsizeduration) {
  case LogicalChannelConfig__ul_SpecificParameters__bucketSizeDuration_ms50:
    return 50;
    break;
  case LogicalChannelConfig__ul_SpecificParameters__bucketSizeDuration_ms100:
    return 100;
    break;
  case LogicalChannelConfig__ul_SpecificParameters__bucketSizeDuration_ms150:
    return 150;
    break;
  case LogicalChannelConfig__ul_SpecificParameters__bucketSizeDuration_ms300:
    return 300;
    break;
  case LogicalChannelConfig__ul_SpecificParameters__bucketSizeDuration_ms500:
    return 500;
    break;
  case LogicalChannelConfig__ul_SpecificParameters__bucketSizeDuration_ms1000:
    return 1000;
    break;
  default:
    return 0;
    break;
  }
}

1749 1750 1751 1752 1753 1754
void update_phr(module_id_t module_idP){

  UE_mac_inst[module_idP].PHR_reporting_active =0;
  UE_mac_inst[module_idP].scheduling_info.periodicPHR_SF =  get_sf_perioidicPHR_Timer(UE_mac_inst[module_idP].scheduling_info.periodicPHR_Timer);
  UE_mac_inst[module_idP].scheduling_info.prohibitPHR_SF =  get_sf_prohibitPHR_Timer(UE_mac_inst[module_idP].scheduling_info.prohibitPHR_Timer);
  // LOG_D(MAC,"phr %d %d\n ",UE_mac_inst[module_idP].scheduling_info.periodicPHR_SF, UE_mac_inst[module_idP].scheduling_info.prohibitPHR_SF);
1755
}
1756
uint8_t get_phr_mapping (module_id_t module_idP, uint8_t eNB_index){
1757

1758 1759 1760
  //power headroom reporting range is from -23 ...+40 dB, as described in 36313
  //note: mac_xface->get_Po_NOMINAL_PUSCH(module_idP) is float
  if (mac_xface->get_PHR(module_idP,eNB_index) < -23)
1761
    return 0;
1762
  else if (mac_xface->get_PHR(module_idP,eNB_index) >= 40)
1763
    return 63;
1764
  else  // -23 to 40
1765
    return  (uint8_t) mac_xface->get_PHR(module_idP,eNB_index) + PHR_MAPPING_OFFSET;
1766

1767
}
1768
int get_sf_perioidicPHR_Timer(uint8_t perioidicPHR_Timer){
1769 1770 1771 1772
  return (perioidicPHR_Timer+1)*10;
}


1773
int get_sf_prohibitPHR_Timer(uint8_t prohibitPHR_Timer){
1774 1775 1776
  return (prohibitPHR_Timer)*10;
}

1777
int get_db_dl_PathlossChange(uint8_t dl_PathlossChange){
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  switch (dl_PathlossChange){
  case MAC_MainConfig__phr_Config__setup__dl_PathlossChange_dB1:
    return 1;
    break;
  case MAC_MainConfig__phr_Config__setup__dl_PathlossChange_dB3:
    return 3;
    break;
  case MAC_MainConfig__phr_Config__setup__dl_PathlossChange_dB6:
    return 6;
    break;
  case MAC_MainConfig__phr_Config__setup__dl_PathlossChange_infinity:
  default:
    return -1;
    break;
  }
}