Dont send DCIs repeatedly for a given sfn/slot

Although the timing isnt perfect, if the VNF adjusts
in the middle of scheduling a DCI the gNB would try to
send two DCIs for a certain sfn/slot; this commit will
stop that from happening. The timing issue still persits.

executables/nr-ue.c

@@ -351,7 +351,6 @@ static void *NRUE_phy_stub_standalone_pnf_task(void *arg)
       };
       send_nsa_standalone_msg(&UL_INFO, crc_ind->header.message_id);
       free(crc_ind->crc_list);
-
     }
   }
   return NULL;

nfapi/open-nFAPI/nfapi/public_inc/nfapi_nr_interface_scf.h

@@ -1761,10 +1761,4 @@ typedef struct
 
 } nfapi_nr_rach_indication_t;
 
-typedef union {
-  nfapi_nr_rach_indication_t rach_ind;
-  nfapi_nr_rx_data_indication_t rx_ind;
-  nfapi_nr_crc_indication_t crc_ind;
-} nr_queue_candidate;
-
 #endif

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c

@@ -1030,7 +1030,14 @@ void nr_schedule_ulsch(module_id_t module_id,
           harq_id,
           cur_harq->round,
           cur_harq->ndi);
-
+    gNB_MAC_INST *gNB = RC.nrmac[0];
+    if (sched_pusch->frame == gNB->handled_frame && sched_pusch->slot == gNB->handled_slot) {
+      LOG_D(NR_MAC, "Dropping becasue frame %d == gNB frame %d, slot %d == gNb slot %d\n",
+            frame, gNB->handled_frame, slot, gNB->handled_slot);
+      return;
+    }
+    gNB->handled_frame = sched_pusch->frame;
+    gNB->handled_slot = sched_pusch->slot;
     /* PUSCH in a later slot, but corresponding DCI now! */
     nfapi_nr_ul_tti_request_t *future_ul_tti_req = &RC.nrmac[module_id]->UL_tti_req_ahead[0][sched_pusch->slot];
     AssertFatal(future_ul_tti_req->SFN == sched_pusch->frame

openair2/LAYER2/NR_MAC_gNB/main.c

@@ -81,6 +81,8 @@ void mac_top_init_gNB(void)
         
       RC.nrmac[i]->ul_handle = 0;
 
+      RC.nrmac[i]->handled_frame = 1025;
+
       if (get_softmodem_params()->phy_test) {
         RC.nrmac[i]->pre_processor_dl = nr_preprocessor_phytest;
         RC.nrmac[i]->pre_processor_ul = nr_ul_preprocessor_phytest;

openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h

@@ -603,6 +603,9 @@ typedef struct gNB_MAC_INST_s {
   NR_CellGroupConfig_t *secondaryCellGroupCommon;
   NR_Type0_PDCCH_CSS_config_t type0_PDCCH_CSS_config;
 
+  frame_t handled_frame;
+  sub_frame_t handled_slot;
+
 } gNB_MAC_INST;
 
 #endif /*__LAYER2_NR_MAC_GNB_H__ */