fix updating TA value more frequenct

openair1/SCHED_NR_UE/fapi_nr_ue_l1.c

@@ -377,11 +377,13 @@ void configure_ta_command(PHY_VARS_NR_UE *ue, fapi_nr_ta_command_pdu *ta_command
 
   int ta_slot_temp = ta_command_pdu->ta_slot + ul_tx_timing_adjustment + NTN_UE_slot_Rx_to_Tx;
   ue->ta_slot =  ta_slot_temp % slots_per_frame;
+  /*
   if (ta_slot_temp > slots_per_frame)
     ue->ta_frame = (ta_command_pdu->ta_frame + ta_slot_temp/slots_per_frame) % 1024;
   else
     ue->ta_frame = ta_command_pdu->ta_frame;
-
+  */
+  ue->ta_frame = (ta_command_pdu->ta_frame + ta_slot_temp/slots_per_frame) % 1024;
   ue->ta_command = ta_command_pdu->ta_command;
   LOG_D(PHY,"TA command received in Frame.Slot %d.%d -- Starting UL time alignment procedures. TA update will be applied at frame %d slot %d\n",
         ta_command_pdu->ta_frame, ta_command_pdu->ta_slot, ue->ta_frame, ue->ta_slot);

openair1/SCHED_NR_UE/phy_procedures_nr_ue.c

@@ -233,16 +233,10 @@ int get_tx_amp_prach(int power_dBm, int power_max_dBm, int N_RB_UL){
 // - Application of timing adjustment according to TS 38.213 p4.2
 // todo:
 // - handle RAR TA application as per ch 4.2 TS 38.213
-static uint64_t idx = 0;
-static int lastFrame;
 void ue_ta_procedures(PHY_VARS_NR_UE *ue, int slot_tx, int frame_tx)
 {
-  //if ( (frame_tx == ue->ta_frame && slot_tx == ue->ta_slot && idx == 0) ||
-       //(frame_tx == ue->ta_frame && slot_tx == ue->ta_slot && (frame_tx - lastFrame) == 100) ) {
 
   if (frame_tx == ue->ta_frame && slot_tx == ue->ta_slot){       
-    lastFrame = frame_tx;
-    idx = 1;
 
     uint16_t ofdm_symbol_size = ue->frame_parms.ofdm_symbol_size;
 

openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c

@@ -3685,7 +3685,12 @@ void nr_ue_process_mac_pdu(nr_downlink_indication_t *dl_info,
         const int ta = ((NR_MAC_CE_TA *)pduP)[1].TA_COMMAND;
         const int tag = ((NR_MAC_CE_TA *)pduP)[1].TAGID;
 
+        
         NR_UL_TIME_ALIGNMENT_t *ul_time_alignment = &mac->ul_time_alignment;
+        static int firstTime = 0;
+        if ((frameP == (ul_time_alignment->frame + 100)%1024) || firstTime == 0 )
+        { 
+          firstTime = 1;
           ul_time_alignment->ta_total += ta - 31;
           ul_time_alignment->tag_id = tag;
           ul_time_alignment->ta_command = ta;
@@ -3693,6 +3698,7 @@ void nr_ue_process_mac_pdu(nr_downlink_indication_t *dl_info,
           ul_time_alignment->slot = slot;
           LOG_D(NR_MAC, "ul_time_alignment->frame: %d, ul_time_alignment->slot: %d\n", ul_time_alignment->frame, ul_time_alignment->slot);
           ul_time_alignment->ta_apply = true;
+        
         /*
         #ifdef DEBUG_HEADER_PARSING
         LOG_D(MAC, "[UE] CE %d : UE Timing Advance : %d\n", i, pduP[1]);
@@ -3703,7 +3709,7 @@ void nr_ue_process_mac_pdu(nr_downlink_indication_t *dl_info,
             LOG_D(NR_MAC, "[%d.%d] Received TA_COMMAND %u TAGID %u CC_id %d TA total %d\n", frameP, slot, ta, tag, CC_id, ul_time_alignment->ta_total);
           else
             LOG_I(NR_MAC, "[%d.%d] Received TA_COMMAND %u TAGID %u CC_id %d TA total %d\n", frameP, slot, ta, tag, CC_id, ul_time_alignment->ta_total);
-
+        } 
         break;
       case DL_SCH_LCID_CON_RES_ID:
         //  Clause 5.1.5 and 6.1.3.3 of 3GPP TS 38.321 version 16.2.1 Release 16