Skip decoding for false retransmission

If UE receives retransmission for already decoded PDSCH, it skips decoding and sets ACK directly.
And adding PDSCH decoding stats and printing then every 64 frames for CI purpose

openair1/PHY/INIT/nr_init_ue.c

@@ -969,6 +969,9 @@ void init_nr_ue_transport(PHY_VARS_NR_UE *ue,
 
   //ue->frame_parms.pucch_config_common.deltaPUCCH_Shift = 1;
   ue->dlsch_MCH[0]  = new_nr_ue_dlsch(1,NR_MAX_DLSCH_HARQ_PROCESSES,NSOFT,MAX_LDPC_ITERATIONS_MBSFN,ue->frame_parms.N_RB_DL,0);
+
+  for(int i=0; i<5; i++)
+    ue->dl_stats[i] = 0;
 }
 
 void phy_init_nr_top(PHY_VARS_NR_UE *ue) {

openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_decoding.c

@@ -253,6 +253,8 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
   }
   t_nrLDPC_procBuf** p_nrLDPC_procBuf = harq_process->p_nrLDPC_procBuf;
 
+  // HARQ stats
+  phy_vars_ue->dl_stats[harq_process->round]++;
     
   int16_t z [68*384];
   int8_t l [68*384];
@@ -671,6 +673,7 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
     if (harq_process->round >= dlsch->Mlimit) {
       harq_process->status = SCH_IDLE;
       harq_process->round  = 0;
+      phy_vars_ue->dl_stats[4]++;
     }
 
     if(is_crnti)

openair1/PHY/defs_nr_UE.h

@@ -1121,6 +1121,8 @@ typedef struct {
   SLIST_HEAD(ral_thresholds_gen_poll_s, ral_threshold_phy_t) ral_thresholds_gen_polled[RAL_LINK_PARAM_GEN_MAX];
   SLIST_HEAD(ral_thresholds_lte_poll_s, ral_threshold_phy_t) ral_thresholds_lte_polled[RAL_LINK_PARAM_LTE_MAX];
 #endif
+  
+  int dl_stats[4];
 
 } PHY_VARS_NR_UE;
 

openair1/SCHED_NR_UE/fapi_nr_ue_l1.c

@@ -93,7 +93,6 @@ int8_t nr_ue_scheduled_response(nr_scheduled_response_t *scheduled_response){
 
           if (dlsch0_harq){
 
-	    dlsch0_harq->status   = ACTIVE;
             dlsch0_harq->BWPStart = dlsch_config_pdu->BWPStart;
             dlsch0_harq->BWPSize = dlsch_config_pdu->BWPSize;
             dlsch0_harq->nb_rb = dlsch_config_pdu->number_rbs;

openair1/SCHED_NR_UE/harq_nr.c

@@ -491,6 +491,8 @@ harq_result_t downlink_harq_process(NR_DL_UE_HARQ_t *dl_harq, int harq_pid, int
 
     dl_harq->round++;
 
+    if (dl_harq->harq_ack.ack) dl_harq->status = SCH_IDLE;
+
     result_harq = RETRANSMISSION_HARQ;
 
     NR_TST_PHY_PRINTF("[HARQ-DL-PDSCH harqId : %d] reception of a retransmission \n", harq_pid);

openair1/SCHED_NR_UE/phy_procedures_nr_ue.c

@@ -936,6 +936,9 @@ void nr_ue_dlsch_procedures(PHY_VARS_NR_UE *ue,
   uint16_t bw_scaling, start_symbol;
   float tc_factor;
 
+  if ((frame_rx%64 == 0) && (nr_tti_rx==0)) 
+    LOG_I(PHY,"Harq round stats for Downlink: %d/%d/%d/%d DLSCH errors: %d\n",ue->dl_stats[0],ue->dl_stats[1],ue->dl_stats[2],ue->dl_stats[3],ue->dl_stats[3]);
+
   is_cw0_active = dlsch0->harq_processes[harq_pid]->status;
   nb_symb_sch = dlsch0->harq_processes[harq_pid]->nb_symbols;
   start_symbol = dlsch0->harq_processes[harq_pid]->start_symbol;