initialization of ta variables

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -1470,6 +1470,8 @@ int add_new_nr_ue(module_id_t mod_idP, rnti_t rntiP){
     memset((void *) &UE_list->UE_sched_ctrl[UE_id],
            0,
            sizeof(NR_UE_sched_ctrl_t));
+    UE_list->UE_sched_ctrl[UE_id].ta_timer = 100;
+    UE_list->UE_sched_ctrl[UE_id].ta_update = 31;
     UE_list->UE_sched_ctrl[UE_id].ul_rssi = 0;
     UE_list->UE_sched_ctrl[UE_id].sched_pucch = (NR_sched_pucch **)malloc(num_slots_ul*sizeof(NR_sched_pucch *));
     for (int s=0; s<num_slots_ul;s++)

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c

@@ -304,7 +304,8 @@ void nr_rx_sdu(const module_id_t gnb_mod_idP,
     // if not missed detection (10dB threshold for now)
     if (UE_scheduling_control->ul_rssi < (100+rssi)) {
       UE_scheduling_control->tpc0 = nr_get_tpc(target_snrx10,ul_cqi,30);
-      UE_scheduling_control->ta_update = timing_advance;
+      if (timing_advance != 0xffff)
+        UE_scheduling_control->ta_update = timing_advance;
       UE_scheduling_control->ul_rssi = rssi;
       LOG_D(MAC, "[UE %d] PUSCH TPC %d and TA %d\n",UE_id,UE_scheduling_control->tpc0,UE_scheduling_control->ta_update);
     }