[OAI-UE] fixes for issue#35 issue#36 issue#37

           1-issue#35: miss dci detection
           2-issue#36: ack/nack on pusch are badly encoded
           3-issue#37: ack/nack are sent on pucch instead of pusch

openair1/PHY/CODING/lte_segmentation.c

@@ -60,7 +60,7 @@ int lte_segmentation(unsigned char *input_buffer,
   }
 
   if ((*C)>MAX_NUM_DLSCH_SEGMENTS) {
-    msg("lte_segmentation.c: too many segments %d\n",*C);
+      LOG_E(PHY,"lte_segmentation.c: too many segments %d, B %d, L %d, Bprime %d\n",*C,B,L,Bprime);
     return(-1);
   }
 

openair1/PHY/LTE_TRANSPORT/dci.c

@@ -3248,7 +3248,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
                           SI_RNTI,
                           ra_rnti,
 			  P_RNTI,
-			  3,
+			  0,
                           format1A,
                           format1A,
                           format1A,
@@ -3277,7 +3277,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
                           SI_RNTI,
                           ra_rnti,
 			  P_RNTI,
-			  2,
+			  1,
                           format1A,
                           format1A,
                           format1A,
@@ -3310,7 +3310,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
                           SI_RNTI,
                           ra_rnti,
 			  P_RNTI,
-                          1,
+                          2,
                           format1A,
                           format1A,
                           format1A,
@@ -3339,7 +3339,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
                           SI_RNTI,
                           ra_rnti,
 			  P_RNTI,
-                          0,
+                          3,
                           format1A,
                           format1A,
                           format1A,

openair1/PHY/LTE_TRANSPORT/dci_tools.c

@@ -4456,6 +4456,7 @@ int generate_ue_dlsch_params_from_dci(int frame,
       dlsch0_harq->status = ACTIVE;
       dlsch0_harq->DCINdi = ndi;
 
+      dlsch[0]->harq_ack[subframe].send_harq_status = 1;
       if (dlsch0_harq->first_tx==1) {
         LOG_D(PHY,"[PDSCH %x/%d] Format 1 DCI First TX: Clearing flag\n");
         dlsch0_harq->first_tx = 0;
@@ -5556,7 +5557,7 @@ int generate_ue_dlsch_params_from_dci(int frame,
 #ifdef DEBUG_DCI
 
   if (dlsch[0] && (dlsch[0]->rnti != 0xffff)) {
-    printf("dci_format:%d \n",dci_format);
+    printf("dci_format:%d Abssubframe: %d.%d \n",dci_format,frame,subframe);
     printf("PDSCH dlsch0 UE: rnti     %x\n",dlsch[0]->rnti);
     printf("PDSCH dlsch0 UE: NBRB     %d\n",dlsch0_harq->nb_rb);
     printf("PDSCH dlsch0 UE: rballoc  %x\n",dlsch0_harq->rb_alloc_even[0]);
@@ -6231,13 +6232,22 @@ int generate_ue_ulsch_params_from_dci(void *dci_pdu,
 
   uint8_t harq_pid;
   uint8_t transmission_mode = ue->transmission_mode[eNB_id];
-  ANFBmode_t AckNackFBMode = ue->pucch_config_dedicated[eNB_id].tdd_AckNackFeedbackMode;
+  ANFBmode_t AckNackFBMode;
   LTE_UE_ULSCH_t *ulsch = ue->ulsch[eNB_id];
   //  LTE_UE_DLSCH_t **dlsch = ue->dlsch[0];
   PHY_MEASUREMENTS *meas = &ue->measurements;
   LTE_DL_FRAME_PARMS *frame_parms = &ue->frame_parms;
   //  uint32_t current_dlsch_cqi = ue->current_dlsch_cqi[eNB_id];
 
+  if(frame_parms->frame_type == TDD)
+  {
+      AckNackFBMode = ue->pucch_config_dedicated[eNB_id].tdd_AckNackFeedbackMode;
+  }
+  else
+  {
+      AckNackFBMode = 1; // 1: multiplexing for FDD
+  }
+
   uint32_t cqi_req;
   uint32_t dai=0;
   uint32_t cshift;

openair1/PHY/LTE_TRANSPORT/phich.c

@@ -1050,7 +1050,6 @@ void generate_phich(LTE_DL_FRAME_PARMS *frame_parms,
 
 // This routine demodulates the PHICH and updates PUSCH/ULSCH parameters
 
-
 void rx_phich(PHY_VARS_UE *ue,
 	      UE_rxtx_proc_t *proc,
               uint8_t subframe,
@@ -1085,8 +1084,10 @@ void rx_phich(PHY_VARS_UE *ue,
   if (!ulsch)
     return;
 
+  LOG_D(PHY,"[UE  %d][PUSCH %d] Frame %d subframe %d PHICH RX Status: %d \n",ue->Mod_id,harq_pid,proc->frame_rx,subframe, ulsch->harq_processes[harq_pid]->status);
+
   if (ulsch->harq_processes[harq_pid]->status == ACTIVE) {
-    LOG_D(PHY,"[UE  %d][PUSCH %d] Frame %d subframe %d PHICH RX ACTIVE\n",ue->Mod_id,harq_pid,proc->frame_rx,subframe);
+     LOG_D(PHY,"[UE  %d][PUSCH %d] Frame %d subframe %d PHICH RX ACTIVE\n",ue->Mod_id,harq_pid,proc->frame_rx,subframe);
     Ngroup_PHICH = (frame_parms->phich_config_common.phich_resource*frame_parms->N_RB_DL)/48;
 
     if (((frame_parms->phich_config_common.phich_resource*frame_parms->N_RB_DL)%48) > 0)

openair1/PHY/LTE_TRANSPORT/ulsch_coding.c

@@ -501,7 +501,7 @@ uint32_t ulsch_encoding(uint8_t *a,
     ulsch->harq_processes[harq_pid]->G = G;
 
 /*
-    LOG_I(PHY,"ULSCH Encoding G %d, Q_RI %d (O_RI%d, Msc_initial %d, Nsymb_initial%d, beta_offset_ri_times8 %d), Q_CQI %d \n",G,Q_RI,ulsch->O_RI,ulsch->harq_processes[harq_pid]->Msc_initial,ulsch->harq_processes[harq_pid]->Nsymb_initial,ulsch->beta_offset_ri_times8,Q_CQI);
+    LOG_I(PHY,"ULSCH Encoding G %d, Q_RI %d (O_RI%d, Msc_initial %d, Nsymb_initial%d, beta_offset_ri_times8 %d), Q_CQI %d, Q_ACK %d \n",G,Q_RI,ulsch->O_RI,ulsch->harq_processes[harq_pid]->Msc_initial,ulsch->harq_processes[harq_pid]->Nsymb_initial,ulsch->beta_offset_ri_times8,Q_CQI,Q_ACK);
 
     LOG_I(PHY,"ULSCH Encoding (Nid_cell %d, rnti %x): harq_pid %d round %d, RV %d, mcs %d, O_RI %d, O_ACK %d, G %d\n",
           frame_parms->Nid_cell,ulsch->rnti,

openair1/SCHED/phy_procedures_lte_ue.c

@@ -61,6 +61,9 @@ fifo_dump_emos_UE emos_dump_UE;
 # include "intertask_interface.h"
 #endif
 
+#include "PHY/defs.h"
+
+#include "PHY/CODING/extern.h"
 
 #define DLSCH_RB_ALLOC 0x1fbf  // skip DC RB (total 23/25 RBs)
 #define DLSCH_RB_ALLOC_12 0x0aaa  // skip DC RB (total 23/25 RBs)
@@ -1026,6 +1029,15 @@ void ulsch_common_procedures(PHY_VARS_UE *ue, UE_rxtx_proc_t *proc) {
     }
 #endif
 #endif
+    /*
+    only for debug
+    LOG_I(PHY,"ul-signal [subframe: %d, ulsch_start %d, TA: %d, rxOffset: %d, timing_advance: %d, hw_timing_advance: %d]\n",subframe_tx, ulsch_start, ue->N_TA_offset, ue->rx_offset, ue->timing_advance, ue->hw_timing_advance);
+    if( (crash == 1) && (subframe_tx == 0) )
+    {
+      LOG_E(PHY,"***** DUMP TX Signal [ulsch_start %d] *****\n",ulsch_start);
+      write_output("txBuff.m","txSignal",&ue->common_vars.txdata[aa][ulsch_start],frame_parms->samples_per_tti,1,1);
+    }
+    */
     
   } //nb_antennas_tx
   
@@ -1242,6 +1254,27 @@ void ue_ulsch_uespec_procedures(PHY_VARS_UE *ue,UE_rxtx_proc_t *proc,uint8_t eNB
     
     
     
+
+    if (ack_status > 0) {
+
+      // check if we received a PDSCH at subframe_tx - 4
+      // ==> send ACK/NACK on PUSCH
+      if( (ue->dlsch[eNB_id][0]->harq_ack[proc->subframe_rx].send_harq_status) == 1)
+      {
+          ue->ulsch[eNB_id]->harq_processes[harq_pid]->O_ACK = 1;
+      }
+      else
+      {
+          ue->ulsch[eNB_id]->harq_processes[harq_pid]->O_ACK = 0;
+      }
+      LOG_D(PHY,"[UE  %d][PDSCH %x] Frame %d subframe %d Generating ACK (%d,%d) for %d bits on PUSCH\n",
+        Mod_id,
+        ue->ulsch[eNB_id]->rnti,
+        frame_tx,subframe_tx,
+        ue->ulsch[eNB_id]->o_ACK[0],ue->ulsch[eNB_id]->o_ACK[1],
+        ue->ulsch[eNB_id]->harq_processes[harq_pid]->O_ACK);
+    }
+
 #ifdef DEBUG_PHY_PROC
     LOG_D(PHY,
 	  "[UE  %d][PUSCH %d] Frame %d subframe %d Generating PUSCH : first_rb %d, nb_rb %d, round %d, mcs %d, rv %d, cyclic_shift %d (cyclic_shift_common %d,n_DMRS2 %d,n_PRS %d), ACK (%d,%d), O_ACK %d\n",
@@ -1260,15 +1293,6 @@ void ue_ulsch_uespec_procedures(PHY_VARS_UE *ue,UE_rxtx_proc_t *proc,uint8_t eNB
 	  ue->ulsch[eNB_id]->harq_processes[harq_pid]->O_ACK);
 #endif
     
-    if (ack_status > 0) {
-      LOG_D(PHY,"[UE  %d][PDSCH %x] Frame %d subframe %d Generating ACK (%d,%d) for %d bits on PUSCH\n",
-	    Mod_id,
-	    ue->ulsch[eNB_id]->rnti,
-	    frame_tx,subframe_tx,
-	    ue->ulsch[eNB_id]->o_ACK[0],ue->ulsch[eNB_id]->o_ACK[1],
-	    ue->ulsch[eNB_id]->harq_processes[harq_pid]->O_ACK);
-    }
-    
     
     
     
@@ -1535,6 +1559,17 @@ void ue_pucch_procedures(PHY_VARS_UE *ue,UE_rxtx_proc_t *proc,uint8_t eNB_id,uin
     ACK/NACK and SR using the shortened PUCCH format. This shortened PUCCH format shall be used in a cell
     specific SRS subframe even if the UE does not transmit SRS in that subframe
   */
+
+  int harq_pid = subframe2harq_pid(&ue->frame_parms,
+                                   frame_tx,
+                                   subframe_tx);
+
+  if(ue->ulsch[eNB_id]->harq_processes[harq_pid]->subframe_scheduling_flag)
+  {
+      LOG_D(PHY,"PUSCH is programmed on this subframe [pid %d] AbsSuframe %d.%d ==> Skip PUCCH transmission \n",harq_pid,frame_tx,subframe_tx);
+      return;
+  }
+
   uint8_t isShortenPucch = (pSoundingrs_ul_config_dedicated->srsCellSubframe && frame_parms->soundingrs_ul_config_common.ackNackSRS_SimultaneousTransmission);
 
   bundling_flag = ue->pucch_config_dedicated[eNB_id].tdd_AckNackFeedbackMode;