PUSCH Repetition confoiguration and combining

Functionalities Added:
	- Modify RAR message to use number of repetitions configuration added in last commit
	- Configure msg3 with number of repetitions
	- DCI configuration for repetitions
	- Repeat MAC UL config each SF for the number of repetitions
	- PHY combining of repeated SF
Signed-off-by: Mohamed Gamal <mohammed.abdelkhalek.ext@orange.com>

openair1/PHY/LTE_TRANSPORT/dci_tools.c

@@ -2022,6 +2022,11 @@ void fill_ulsch(PHY_VARS_eNB *eNB,int UE_id,nfapi_ul_config_ulsch_pdu *ulsch_pdu
   ulsch->ue_type = 0;
 #endif
 
+  if(ulsch_pdu->ulsch_pdu_rel13.repetition_number >1)	// Fill the Harq process parameters in the first Rep only
+  {
+	  return;
+  }
+
   //AssertFatal(ulsch->harq_processes[harq_pid]->nb_rb>0,"nb_rb = 0\n");
   if(ulsch->harq_processes[harq_pid]->nb_rb == 0){
     LOG_E(PHY, "fill_ulsch UE_id %d nb_rb = 0\n", UE_id);
@@ -2031,6 +2036,9 @@ void fill_ulsch(PHY_VARS_eNB *eNB,int UE_id,nfapi_ul_config_ulsch_pdu *ulsch_pdu
   ulsch->harq_processes[harq_pid]->subframe                              = subframe;
   ulsch->harq_processes[harq_pid]->handled                               = 0;
 
+  ulsch->harq_processes[harq_pid]->repetition_number			 = ulsch_pdu->ulsch_pdu_rel13.repetition_number ;
+  ulsch->harq_processes[harq_pid]->total_number_of_repetitions		 = ulsch_pdu->ulsch_pdu_rel13.total_number_of_repetitions ;
+
   ulsch->harq_processes[harq_pid]->first_rb                              = ulsch_pdu->ulsch_pdu_rel8.resource_block_start;
   ulsch->harq_processes[harq_pid]->nb_rb                                 = ulsch_pdu->ulsch_pdu_rel8.number_of_resource_blocks;
 

openair1/PHY/LTE_TRANSPORT/transport_eNB.h

@@ -319,6 +319,12 @@ typedef struct {
   //  int calibration_flag;
   /// delta_TF for power control
   int32_t delta_TF;
+#if (LTE_RRC_VERSION >= MAKE_VERSION(14, 0, 0))
+  // PUSCH Repetition Number for the current SF
+  uint32_t repetition_number ;
+  // PUSCH Total number of repetitions
+  uint32_t total_number_of_repetitions;
+#endif
 } LTE_UL_eNB_HARQ_t;
 
 typedef struct {

openair1/PHY/LTE_TRANSPORT/ulsch_decoding.c

@@ -555,12 +555,18 @@ int ulsch_decoding_data(PHY_VARS_eNB *eNB,int UE_id,int harq_pid,int llr8_flag)
   int G = ulsch_harq->G;
   unsigned int E;
   decoder_if_t *tc;
+  static int32_t pusch_rep_buffer[3*(6144+64)];
+  int max_Ncb;
 
   if (llr8_flag == 0)
     tc = *decoder16;
   else
     tc = *decoder8;
 
+  if(ulsch_harq->repetition_number == 1){
+	  memset(pusch_rep_buffer,0,(sizeof(int32_t)*3*(6144+64))) ;  // reset the buffer every new repetitions
+  }
+
   for (r=0; r<ulsch_harq->C; r++) {
     //    printf("before subblock deinterleaving c[%d] = %p\n",r,ulsch_harq->c[r]);
     // Get Turbo interleaver parameters
@@ -594,7 +600,7 @@ int ulsch_decoding_data(PHY_VARS_eNB *eNB,int UE_id,int harq_pid,int llr8_flag)
                                    0,   //Uplink
                                    1,
                                    ulsch_harq->rvidx,
-                                   (ulsch_harq->round==0)?1:0,  // clear
+                                   (ulsch_harq->rvidx==0)?1:0,  // clear
                                    ulsch_harq->Qm,
                                    1,
                                    r,
@@ -604,6 +610,27 @@ int ulsch_decoding_data(PHY_VARS_eNB *eNB,int UE_id,int harq_pid,int llr8_flag)
     }
 
     stop_meas(&eNB->ulsch_rate_unmatching_stats);
+
+    max_Ncb = 3*ulsch_harq->RTC[r]*32 ;
+
+    if(ulsch_harq->total_number_of_repetitions > 1)
+    {
+    	if (ulsch_harq->rvidx==1)
+    	{ 					// Store the result of HARQ combining in the last emtc repetitions of sequence 0,2,3,1
+    		for (int nn=0;nn<max_Ncb;nn++)
+    		{
+    			pusch_rep_buffer[nn] += ulsch_harq->w[r][nn] ;
+    		}
+        }
+    	if (ulsch_harq->repetition_number == ulsch_harq->total_number_of_repetitions)
+    	{
+    		for (int nn=0;nn<max_Ncb;nn++)
+    		{
+    			ulsch_harq->w[r][nn] =  pusch_rep_buffer[nn] ;
+      		}
+      	}
+      }
+
     r_offset += E;
     start_meas(&eNB->ulsch_deinterleaving_stats);
     sub_block_deinterleaving_turbo(4+Kr,

openair1/SCHED/phy_procedures_lte_eNb.c

@@ -1158,6 +1158,7 @@ void pusch_procedures(PHY_VARS_eNB *eNB,L1_rxtx_proc_t *proc) {
   const int subframe = proc->subframe_rx;
   const int frame    = proc->frame_rx;
   uint32_t harq_pid0 = subframe2harq_pid(&eNB->frame_parms,frame,subframe);
+  int   rvidx_tab[4] = {0,2,3,1};
 
   for (i = 0; i < NUMBER_OF_UE_MAX; i++) {
     ulsch = eNB->ulsch[i];
@@ -1174,8 +1175,8 @@ void pusch_procedures(PHY_VARS_eNB *eNB,L1_rxtx_proc_t *proc) {
     if ((ulsch) &&
         (ulsch->rnti>0) &&
         (ulsch_harq->status == ACTIVE) &&
-        (ulsch_harq->frame == frame) &&
-        (ulsch_harq->subframe == subframe) &&
+        ((ulsch_harq->frame == frame)	    || (ulsch_harq->repetition_number >1) ) &&
+        ((ulsch_harq->subframe == subframe) || (ulsch_harq->repetition_number >1) ) &&
         (ulsch_harq->handled == 0)) {
       // UE has ULSCH scheduling
       for (int rb=0;
@@ -1232,6 +1233,10 @@ void pusch_procedures(PHY_VARS_eNB *eNB,L1_rxtx_proc_t *proc) {
             ulsch_harq->cqi_crc_status,
             ulsch_harq->O_ACK,
             eNB->ulsch_decoding_stats.p_time, eNB->ulsch_decoding_stats.max);
+      if (ulsch_harq->repetition_number < ulsch_harq->total_number_of_repetitions){
+    	  ulsch_harq->rvidx = rvidx_tab[(ulsch_harq->repetition_number%4)] ;  			// Set the correct rvidx for the next emtc repetitions
+    	  ulsch_harq->repetition_number +=1  ; 							// Increment repetition_number for the next ULSCH allocation
+      }
       //compute the expected ULSCH RX power (for the stats)
       ulsch_harq->delta_TF = get_hundred_times_delta_IF_eNB(eNB,i,harq_pid, 0); // 0 means bw_factor is not considered
 
@@ -1287,7 +1292,7 @@ void pusch_procedures(PHY_VARS_eNB *eNB,L1_rxtx_proc_t *proc) {
          */
         ulsch_harq->handled = 1;
       }                         // ulsch in error
-      else {
+      else if(ulsch_harq->repetition_number == ulsch_harq->total_number_of_repetitions){
         fill_crc_indication(eNB,i,frame,subframe,0); // indicate ACK to MAC
         fill_rx_indication(eNB,i,frame,subframe);  // indicate SDU to MAC
         ulsch_harq->status = SCH_IDLE;

openair2/LAYER2/MAC/eNB_scheduler_RA.c

@@ -68,6 +68,7 @@
 
 extern RAN_CONTEXT_t RC;
 
+extern const uint8_t pusch_repetition_Table8_2_36213[3][4];
 
 extern int oai_nfapi_hi_dci0_req(nfapi_hi_dci0_request_t *hi_dci0_req);
 
@@ -98,6 +99,7 @@ void
 add_msg3(module_id_t module_idP, int CC_id, RA_t *ra, frame_t frameP,
          sub_frame_t subframeP) {
   eNB_MAC_INST *mac = RC.mac[module_idP];
+  eNB_RRC_INST *rrc = RC.rrc[module_idP];
   COMMON_channels_t *cc = &mac->common_channels[CC_id];
   uint8_t j;
   nfapi_ul_config_request_t *ul_req;
@@ -108,6 +110,7 @@ add_msg3(module_id_t module_idP, int CC_id, RA_t *ra, frame_t frameP,
   nfapi_hi_dci0_request_pdu_t    *hi_dci0_pdu;
   uint8_t sf_ahead_dl;
   uint8_t rvseq[4] = {0, 2, 3, 1};
+  uint8_t pusch_maxNumRepetitionCEmodeA_r13;
   ul_req = &mac->UL_req_tmp[CC_id][ra->Msg3_subframe];
   ul_req_body = &ul_req->ul_config_request_body;
   AssertFatal(ra->state != IDLE, "RA is not active for RA %X\n",
@@ -140,7 +143,13 @@ add_msg3(module_id_t module_idP, int CC_id, RA_t *ra, frame_t frameP,
     ul_config_pdu->ulsch_pdu.ulsch_pdu_rel8.size = get_TBS_UL (ra->msg3_mcs, ra->msg3_nb_rb);
     // Re13 fields
     ul_config_pdu->ulsch_pdu.ulsch_pdu_rel13.ue_type = ra->rach_resource_type > 2 ? 2 : 1;
-    ul_config_pdu->ulsch_pdu.ulsch_pdu_rel13.total_number_of_repetitions = 1;
+    if (ra->rach_resource_type > 0) {
+	pusch_maxNumRepetitionCEmodeA_r13= *(rrc->configuration.pusch_maxNumRepetitionCEmodeA_r13[CC_id]);
+	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel13.total_number_of_repetitions= pusch_repetition_Table8_2_36213[pusch_maxNumRepetitionCEmodeA_r13][ra->pusch_repetition_levels];
+    }
+    else{
+    	ul_config_pdu->ulsch_pdu.ulsch_pdu_rel13.total_number_of_repetitions=1;
+    }
     ul_config_pdu->ulsch_pdu.ulsch_pdu_rel13.repetition_number = 1;
     ul_config_pdu->ulsch_pdu.ulsch_pdu_rel13.initial_transmission_sf_io = (ra->Msg3_frame * 10) + ra->Msg3_subframe;
     ul_req_body->number_of_pdus++;
@@ -238,6 +247,7 @@ void generate_Msg2(module_id_t module_idP,
 //------------------------------------------------------------------------------
 {
   eNB_MAC_INST *mac = RC.mac[module_idP];
+  eNB_RRC_INST *rrc = RC.rrc[module_idP];
   COMMON_channels_t *cc = mac->common_channels;
   uint8_t *vrb_map = NULL;
   int first_rb = 0;
@@ -250,6 +260,7 @@ void generate_Msg2(module_id_t module_idP,
   dl_config_pdu = &dl_req_body->dl_config_pdu_list[dl_req_body->number_pdu];
   N_RB_DL = to_prb(cc[CC_idP].mib->message.dl_Bandwidth);
 #if (LTE_RRC_VERSION >= MAKE_VERSION(14, 0, 0))
+  uint8_t PUSCH_Rep_Level;
   int             rmax = 0;
   int             rep = 0;
   int             reps = 0;
@@ -261,6 +272,13 @@ void generate_Msg2(module_id_t module_idP,
   uint16_t        absSF = (10 * frameP) + subframeP;
   uint16_t        absSF_Msg2 = (10 * ra->Msg2_frame) + ra->Msg2_subframe;
 
+  if (ra->rach_resource_type > 0) {
+	PUSCH_Rep_Level= *(rrc->configuration.pusch_repetitionLevelCEmodeA_r13[CC_idP]);
+  }
+  else {
+  	PUSCH_Rep_Level= 0;
+  }
+
   if (absSF > absSF_Msg2) {
     return; // we're not ready yet
   }
@@ -402,6 +420,8 @@ void generate_Msg2(module_id_t module_idP,
         ra->msg2_mpdcch_repetition_cnt++;
       }
 
+      ra->pusch_repetition_levels = PUSCH_Rep_Level;
+	  
       if((ra->Msg2_frame == frameP) && (ra->Msg2_subframe == subframeP)) {
         /* Program PDSCH */
         LOG_D(MAC, "[eNB %d][RAPROC] Frame %d, Subframe %d : In generate_Msg2, Programming PDSCH\n",
@@ -1270,6 +1290,7 @@ check_Msg4_retransmission(module_id_t module_idP, int CC_idP,
     UE_id = find_UE_id(module_idP, ra->rnti);
     DevAssert(UE_id != -1);
     mac->UE_list.UE_template[UE_PCCID(module_idP, UE_id)][UE_id].configured = TRUE;
+    mac->UE_list.UE_template[UE_PCCID(module_idP, UE_id)][UE_id].pusch_repetition_levels=ra->pusch_repetition_levels;
     cancel_ra_proc(module_idP, CC_idP, frameP, ra->rnti);
   }
 }

openair2/LAYER2/MAC/eNB_scheduler_ulsch.c

@@ -84,6 +84,14 @@ uint8_t rb_table[34] = {
   81, 90, 96, 100     // 30-33
 };
 
+// This table hold the possible number of MTC repetition for CE ModeA
+const uint8_t pusch_repetition_Table8_2_36213[3][4]=
+{
+		1 , 2 , 4 , 8 ,
+		1 , 4 , 8 , 16,
+		1 , 4 , 16, 32
+};
+
 extern mui_t rrc_eNB_mui;
 
 //-----------------------------------------------------------------------------
@@ -301,6 +309,11 @@ rx_sdu(const module_id_t enb_mod_idP,
       if (ra->msg3_round >= mac->common_channels[CC_idP].radioResourceConfigCommon->rach_ConfigCommon.maxHARQ_Msg3Tx - 1) {
         cancel_ra_proc(enb_mod_idP, CC_idP, frameP, current_rnti);
       } else {
+    	  if (ra->rach_resource_type > 0) {
+    		  cancel_ra_proc(enb_mod_idP, CC_idP, frameP, current_rnti);				// TODO: Currently we don't support retransmission of Msg3 ( If in error Cancel RA procedure and reattach)
+    	      }
+    	  else
+    	  {
     		  // first_rb = UE_template_ptr->first_rb_ul[harq_pid]; // UE_id = -1 !!!!
     		          ra->msg3_round++;
     		          /* Prepare handling of retransmission */
@@ -312,6 +325,7 @@ rx_sdu(const module_id_t enb_mod_idP,
     		          // prepare handling of retransmission
     		          add_msg3(enb_mod_idP, CC_idP, ra, frameP, subframeP);
     	  }
+      }
 
       /* TODO: program NACK for PHICH? */
       return;
@@ -1958,23 +1972,25 @@ void schedule_ulsch_rnti_emtc(module_id_t   module_idP,
   int               tpc = 0;
   int               cqi_req = 0;
   eNB_MAC_INST      *eNB = RC.mac[module_idP];
+  eNB_RRC_INST      *rrc = RC.rrc[module_idP];
   COMMON_channels_t *cc  = eNB->common_channels;
   UE_list_t         *UE_list = &(eNB->UE_list);
   UE_TEMPLATE       *UE_template = NULL;
   UE_sched_ctrl_t     *UE_sched_ctrl = NULL;
+  uint8_t	    Total_Num_Rep_ULSCH,pusch_maxNumRepetitionCEmodeA_r13;
+  uint8_t	    UL_Scheduling_DCI_SF,UL_Scheduling_DCI_Frame_Even_Odd_Flag;							//TODO: To be removed after scheduler relaxation Task
 
   if (sched_subframeP < subframeP) {
     sched_frame++;
   }
 
   nfapi_hi_dci0_request_body_t   *hi_dci0_req = &(eNB->HI_DCI0_req[CC_id][subframeP].hi_dci0_request_body);
+  nfapi_hi_dci0_request_body_t   *hi_dci0_req_Rep;
   nfapi_hi_dci0_request_pdu_t    *hi_dci0_pdu = NULL;
   nfapi_ul_config_request_body_t *ul_req_tmp = &(eNB->UL_req_tmp[CC_id][sched_subframeP].ul_config_request_body);
-
-  /* If frameP odd don't schedule */
-  if ((frameP & 1) == 1) {
-    return;
-  }
+  nfapi_ul_config_request_body_t *ul_req_body_Rep;
+  nfapi_ul_config_request_pdu_t  *ul_config_pdu;
+  nfapi_ul_config_request_pdu_t  *ul_config_pdu_Rep;
 
   /* Loop over all active UEs */
   for (UE_id = UE_list->head_ul; UE_id >= 0; UE_id = UE_list->next_ul[UE_id]) {
@@ -2032,8 +2048,18 @@ void schedule_ulsch_rnti_emtc(module_id_t   module_idP,
       RC.eNB[module_idP][CC_id]->pusch_stats_BO[UE_id][(frameP*10)+subframeP] = UE_template->estimated_ul_buffer;
       VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_UE0_BO, UE_template->estimated_ul_buffer);
 
+      pusch_maxNumRepetitionCEmodeA_r13= *(rrc->configuration.pusch_maxNumRepetitionCEmodeA_r13[CC_id]);
+      Total_Num_Rep_ULSCH = pusch_repetition_Table8_2_36213[pusch_maxNumRepetitionCEmodeA_r13][UE_template->pusch_repetition_levels];
+      UL_Scheduling_DCI_SF = (40-4 - Total_Num_Rep_ULSCH)%10;										//TODO: [eMTC Scheduler] To be removed after scheduler relaxation task
+      UL_Scheduling_DCI_Frame_Even_Odd_Flag= ! (((40-4 - Total_Num_Rep_ULSCH)/10 )%2);							//TODO: [eMTC Scheduler] To be removed after scheduler relaxation task
+
+      /* If frameP odd don't schedule */
+      if ((frameP&1) == UL_Scheduling_DCI_Frame_Even_Odd_Flag)										//TODO: [eMTC Scheduler] To be removed after scheduler relaxation task
+      {
+
+
       //if ((UE_is_to_be_scheduled(module_idP, CC_id, UE_id) > 0) && (subframeP == 5)) {
-      if ((UE_template->ul_SR > 0 || round_UL > 0 || status < RRC_CONNECTED) && (subframeP == 5)) {
+      if ((UE_template->ul_SR > 0 || round_UL > 0 || status < RRC_CONNECTED) && (subframeP == UL_Scheduling_DCI_SF)) {
         /*
          * if there is information on bsr of DCCH, DTCH,
          * or if there is UL_SR,
@@ -2184,7 +2210,7 @@ void schedule_ulsch_rnti_emtc(module_id_t   module_idP,
           hi_dci0_pdu->mpdcch_dci_pdu.mpdcch_dci_pdu_rel13.resource_block_start = UE_template->first_rb_ul[harq_pid];
           hi_dci0_pdu->mpdcch_dci_pdu.mpdcch_dci_pdu_rel13.number_of_resource_blocks = 6;
           hi_dci0_pdu->mpdcch_dci_pdu.mpdcch_dci_pdu_rel13.mcs = 4;       // adjust according to size of RAR, 208 bits with N1A_PRB = 3
-          hi_dci0_pdu->mpdcch_dci_pdu.mpdcch_dci_pdu_rel13.pusch_repetition_levels = 0;
+          hi_dci0_pdu->mpdcch_dci_pdu.mpdcch_dci_pdu_rel13.pusch_repetition_levels = UE_template->pusch_repetition_levels;
           AssertFatal(epdcch_setconfig_r11->ext2->mpdcch_config_r13->choice.setup.mpdcch_pdsch_HoppingConfig_r13 == LTE_EPDCCH_SetConfig_r11__ext2__mpdcch_config_r13__setup__mpdcch_pdsch_HoppingConfig_r13_off,
                       "epdcch_setconfig_r11->ext2->mpdcch_config_r13->mpdcch_pdsch_HoppingConfig_r13 is not off\n");
           hi_dci0_pdu->mpdcch_dci_pdu.mpdcch_dci_pdu_rel13.frequency_hopping_flag = 1 - epdcch_setconfig_r11->ext2->mpdcch_config_r13->choice.setup.mpdcch_pdsch_HoppingConfig_r13;
@@ -2234,7 +2260,7 @@ void schedule_ulsch_rnti_emtc(module_id_t   module_idP,
                                               );
           fill_nfapi_ulsch_config_request_emtc(&ul_req_tmp->ul_config_pdu_list[ul_req_tmp->number_of_pdus],
                                                UE_template->rach_resource_type > 2 ? 2 : 1,
-                                               1, // total_number_of_repetitions
+                                               Total_Num_Rep_ULSCH, // total_number_of_repetitions
                                                1, // repetition_number
                                                (frameP * 10) + subframeP);
           ul_req_tmp->number_of_pdus++;
@@ -2364,5 +2390,26 @@ void schedule_ulsch_rnti_emtc(module_id_t   module_idP,
       } // UE_is_to_be_scheduled
     } // ULCCs
    } // loop over UE_id
+  } // Schedule new ULSCH
+
+  // This section is to repeat ULSCH PDU for a number of MTC repetitions
+  for(int i=0;i<ul_req_tmp->number_of_pdus;i++)
+  {
+	  ul_config_pdu = &ul_req_tmp->ul_config_pdu_list[i];
+	  if (ul_config_pdu->pdu_type!=NFAPI_UL_CONFIG_ULSCH_PDU_TYPE) // Repeat ULSCH PDUs only
+		  continue ;
+
+	  if(ul_config_pdu->ulsch_pdu.ulsch_pdu_rel13.repetition_number < ul_config_pdu->ulsch_pdu.ulsch_pdu_rel13.total_number_of_repetitions)
+	  {
+		  hi_dci0_req_Rep = &eNB->HI_DCI0_req[CC_id][(sched_subframeP+1)%10].hi_dci0_request_body;
+		  ul_req_body_Rep = &eNB->UL_req_tmp[CC_id][(sched_subframeP+1)%10].ul_config_request_body;
+		  ul_config_pdu_Rep = &ul_req_body_Rep->ul_config_pdu_list[ul_req_body_Rep->number_of_pdus];
+//		  memset ((void *) ul_config_pdu_Rep, 0, sizeof (nfapi_ul_config_request_pdu_t));
+		  memcpy ((void *) ul_config_pdu_Rep, ul_config_pdu, sizeof (nfapi_ul_config_request_pdu_t));
+		  ul_config_pdu_Rep->ulsch_pdu.ulsch_pdu_rel8.handle = eNB->ul_handle++;
+		  ul_config_pdu_Rep->ulsch_pdu.ulsch_pdu_rel13.repetition_number = ul_config_pdu->ulsch_pdu.ulsch_pdu_rel13.repetition_number +1;
+		  ul_req_body_Rep->number_of_pdus++;
+	  } //repetition_number < total_number_of_repetitions
+  }   // For loop on PDUs
 }
 #endif

openair2/LAYER2/MAC/mac.h

@@ -921,6 +921,8 @@ typedef struct {
     uint8_t rach_resource_type;
     uint16_t mpdcch_repetition_cnt;
     frame_t Msg2_frame;
+    /// Repetition column in pusch_repetition Table 8.2.b in TS36.213
+    uint8_t pusch_repetition_levels;
 #endif
     sub_frame_t Msg2_subframe;
 
@@ -1133,6 +1135,8 @@ typedef struct {
   uint8_t msg2_narrowband;
   uint8_t msg34_narrowband;
   int     msg4_rrc_sdu_length;
+  /// Repetition column in pusch_repetition Table 8.2.b in TS36.213
+  uint8_t pusch_repetition_levels;
 #endif
   int32_t  crnti_rrc_mui;
   int8_t   crnti_harq_pid;

openair2/LAYER2/MAC/rar_tools.c

@@ -127,7 +127,6 @@ unsigned short fill_rar_br(eNB_MAC_INST *eNB,
   uint8_t *rar = (uint8_t *)(dlsch_buffer + 1);
 
   uint32_t rballoc = 0;
-  uint32_t reps = 0;
   uint32_t ULdelay = 0;
   uint32_t cqireq = 0;
   uint32_t mpdcch_nb_index = 0;
@@ -159,7 +158,6 @@ unsigned short fill_rar_br(eNB_MAC_INST *eNB,
     N_NB_index = get_numnarrowbandbits(cc->mib->message.dl_Bandwidth);
 
     /* UL Grant */
-    reps = 0;
     ra->msg3_mcs = 7;
     TPC = 3; // no power increase
     ULdelay = 0;
@@ -170,7 +168,7 @@ unsigned short fill_rar_br(eNB_MAC_INST *eNB,
     uint32_t buffer = 0;
     buffer |= ra->msg34_narrowband << (16 + (4 - N_NB_index));
     buffer |= ((rballoc & 0x0F) << (12 + (4 - N_NB_index)));
-    buffer |= ((reps & 0x03) << (10 + (4 - N_NB_index)));
+    buffer |= ((ra->pusch_repetition_levels & 0x03) << (10 + (4 - N_NB_index)));
     buffer |= ((ra->msg3_mcs & 0x07) << (7 + (4 - N_NB_index)));
     buffer |= ((TPC & 0x07) << (4 + (4 - N_NB_index)));
     buffer |= ((cqireq & 0x01) << (3 + (4 - N_NB_index)));