nr-ip-ul nos1: Small modification to be able to block the random traffic (which is generated when there is no Uplink IP traffic at the UE) at the MAC layer of the gNB

openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c

@@ -2995,6 +2995,8 @@ nr_ue_get_sdu(module_id_t module_idP, int CC_id, frame_t frameP,
   // Generate header
   // if (num_sdus>0) {
 
+  // cycle through SDUs and place in ulsch_buffer
+  if (sdu_length_total) {
   payload_offset = nr_generate_ulsch_header(ulsch_buffer,  // mac header
                                          num_sdus,  // num sdus
                                          short_padding, // short pading
@@ -3012,8 +3014,7 @@ nr_ue_get_sdu(module_id_t module_idP, int CC_id, frame_t frameP,
         short_padding, post_padding, bsr_len, phr_len,
         buflen - sdu_length_total - payload_offset);
 
-  // cycle through SDUs and place in ulsch_buffer
-  if (sdu_length_total) {
+
     memcpy(&ulsch_buffer[payload_offset], ulsch_buff,
            sdu_length_total);
   }