Added more checks when applying dci decisions in the dataplane, to reduce RLC request misses

openair2/LAYER2/MAC/eNB_agent_scheduler_dataplane.c

@@ -181,6 +181,17 @@ void apply_ue_spec_scheduling_decisions(mid_t mod_id,
 	      mod_id, frame, lcid, CC_id, rlc_size);
 	if (rlc_size > 0) {
 	  
+	  rlc_status = mac_rlc_status_ind(mod_id,
+	   				  rnti,
+	   				  mod_id,
+	   				  frame,
+	   				  ENB_FLAG_YES,
+	   				  MBMS_FLAG_NO,
+	   				  lcid,
+	   				  0);
+
+	  if (rlc_status.bytes_in_buffer > 0) {
+
 	    rlc_status = mac_rlc_status_ind(mod_id,
 					    rnti,
 					    mod_id,
@@ -194,6 +205,8 @@ void apply_ue_spec_scheduling_decisions(mid_t mod_id,
 	  
 	    LOG_D(MAC, "[TEST] RLC can give %d bytes for LCID %d during second call\n", rlc_status.bytes_in_buffer, lcid);
 	  
+	    if (rlc_status.bytes_in_buffer > 0) {
+	      
 	      sdu_lengths[i] += mac_rlc_data_req(mod_id,
 						 rnti,
 						 mod_id,
@@ -218,6 +231,8 @@ void apply_ue_spec_scheduling_decisions(mid_t mod_id,
 	      
 	      num_sdus++;
 	    }
+	  }
+	}
       } // SDU creation end
       
       
@@ -249,7 +264,7 @@ void apply_ue_spec_scheduling_decisions(mid_t mod_id,
 	ta_update = (ta_len > 0) ? ue_sched_ctl->ta_update : 0;
 
 	// If there is nothing to schedule, just leave
-	if ((sdu_length_total + ta_len) < 0) { 
+	if ((sdu_length_total + ta_len) <= 0) { 
 	  return;
 	}