Fix: TPC control with average SNR value.

(cherry picked from commit 243c90f647a1f97dc3a1486502dc6263b5705e39)

openair2/LAYER2/MAC/eNB_scheduler_primitives.c

@@ -2448,6 +2448,7 @@ add_new_ue(module_id_t mod_idP,
     UE_list->assoc_dl_slice_idx[UE_id] = 0;
     UE_list->assoc_ul_slice_idx[UE_id] = 0;
     UE_list->UE_sched_ctrl[UE_id].ta_update = 31;
+    UE_scheduling_control->pusch_snr[CC_idP] = 0;
 
     for (j = 0; j < 8; j++) {
         UE_list->UE_template[cc_idP][UE_id].oldNDI[j][TB1] = (j == 0) ? 1 : 0;    // 1 because first transmission is with format1A (Msg4) for harq_pid 0

openair2/LAYER2/MAC/eNB_scheduler_ulsch.c

@@ -172,7 +172,14 @@ rx_sdu(const module_id_t enb_mod_idP,
        * maybe it's even not correct at all?
        */
       UE_scheduling_control->ta_update = (UE_scheduling_control->ta_update * 3 + timing_advance) / 4;
-      UE_scheduling_control->pusch_snr[CC_idP] = ul_cqi;
+      
+      if(UE_scheduling_control->pusch_snr[CC_idP] == 0) {
+        UE_scheduling_control->pusch_snr[CC_idP] = ul_cqi;
+      }
+      else {
+        UE_scheduling_control->pusch_snr[CC_idP] = (UE_scheduling_control->pusch_snr[CC_idP] * 3 + ul_cqi) / 4;
+      }
+      
       UE_scheduling_control->ul_consecutive_errors = 0;
 
       first_rb = UE_template_ptr->first_rb_ul[harq_pid];