reworking gNB PUCCH scheduling

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c

@@ -215,8 +215,7 @@ void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
   // Schedule CSI-RS transmission
   nr_csirs_scheduling(module_idP, frame, slot, nr_slots_per_frame[*scc->ssbSubcarrierSpacing]);
 
-  // Schedule CSI measurement reporting: check in slot 0 for the whole frame
-  if (slot == 0)
+  // Schedule CSI measurement reporting
   nr_csi_meas_reporting(module_idP, frame, slot);
 
   // Schedule SRS: check in slot 0 for the whole frame
@@ -237,10 +236,9 @@ void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
   nr_schedule_ue_spec(module_idP, frame, slot); 
   stop_meas(&gNB->schedule_dlsch);
 
-  nr_schedule_pucch(RC.nrmac[module_idP], frame, slot);
+  nr_sr_reporting(RC.nrmac[module_idP], frame, slot, module_idP);
 
-  // This schedule SR after PUCCH for multiplexing
-  nr_sr_reporting(RC.nrmac[module_idP], frame, slot);
+  nr_schedule_pucch(RC.nrmac[module_idP], frame, slot);
 
   stop_meas(&RC.nrmac[module_idP]->eNB_scheduler);
   

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -1087,7 +1087,7 @@ void nr_configure_pucch(nfapi_nr_pucch_pdu_t* pucch_pdu,
   pucch_pdu->cyclic_prefix = (current_BWP->cyclicprefix==NULL) ? 0 : *current_BWP->cyclicprefix;
 
   NR_PUCCH_Config_t *pucch_Config = current_BWP->pucch_Config;
-  if (r_pucch<0 || pucch_Config){
+  if (r_pucch<0 || pucch_Config) {
       LOG_D(NR_MAC,"pucch_acknak: Filling dedicated configuration for PUCCH\n");
 
       AssertFatal(pucch_Config->resourceSetToAddModList!=NULL,
@@ -2375,6 +2375,17 @@ void configure_UE_BWP(gNB_MAC_INST *nr_mac,
   else
     UL_BWP->pucch_ConfigCommon = scc->uplinkConfigCommon->initialUplinkBWP->pucch_ConfigCommon->choice.setup;
 
+  UL_BWP->max_fb_time = 0;
+  if(DL_BWP->dci_format != NR_DL_DCI_FORMAT_1_0 &&
+     UL_BWP->pucch_Config) {
+    for (int i=0; i<UL_BWP->pucch_Config->dl_DataToUL_ACK->list.count; i++) {
+      if(*UL_BWP->pucch_Config->dl_DataToUL_ACK->list.array[i] > UL_BWP->max_fb_time)
+        UL_BWP->max_fb_time = *UL_BWP->pucch_Config->dl_DataToUL_ACK->list.array[i];
+    }
+  }
+  else
+     UL_BWP->max_fb_time = 8; // default value
+
 
   if(UE) {
     // setting PDCCH related structures for sched_ctrl
@@ -2410,6 +2421,8 @@ void configure_UE_BWP(gNB_MAC_INST *nr_mac,
     if (UL_BWP->csi_MeasConfig)
       compute_csi_bitlen (UL_BWP->csi_MeasConfig, UE->csi_report_template);
 
+    set_sched_pucch_list(sched_ctrl, UL_BWP, scc);
+
   }
 
   if(ra) {
@@ -2456,6 +2469,7 @@ void configure_UE_BWP(gNB_MAC_INST *nr_mac,
                                           NR_RNTI_C,
                                           target_ss,
                                           false);
+
 }
 
 void reset_srs_stats(NR_UE_info_t *UE) {
@@ -2553,6 +2567,34 @@ NR_UE_info_t *add_new_nr_ue(gNB_MAC_INST *nr_mac, rnti_t rntiP, NR_CellGroupConf
   return (UE);
 }
 
+void set_sched_pucch_list(NR_UE_sched_ctrl_t *sched_ctrl,
+                          NR_UE_UL_BWP_t *ul_bwp,
+                          NR_ServingCellConfigCommon_t *scc) {
+
+  const NR_TDD_UL_DL_Pattern_t *tdd = scc->tdd_UL_DL_ConfigurationCommon ? &scc->tdd_UL_DL_ConfigurationCommon->pattern1 : NULL;
+  const int n_slots_frame = nr_slots_per_frame[ul_bwp->scs];
+  const int nr_slots_period = tdd ? n_slots_frame / get_nb_periods_per_frame(tdd->dl_UL_TransmissionPeriodicity) : n_slots_frame;
+  const int n_ul_slots_period = tdd ? tdd->nrofUplinkSlots + (tdd->nrofUplinkSymbols > 0 ? 1 : 0) : n_slots_frame;
+
+  const int list_size = n_ul_slots_period << (ul_bwp->max_fb_time/nr_slots_period);
+  if(!sched_ctrl->sched_pucch) {
+    sched_ctrl->sched_pucch = malloc(list_size * sizeof(*sched_ctrl->sched_pucch));
+    sched_ctrl->sched_pucch_size = list_size;
+    for(int i=0; i<list_size; i++) {
+      NR_sched_pucch_t *curr_pucch = &sched_ctrl->sched_pucch[i];
+      memset(curr_pucch, 0, sizeof(*curr_pucch));
+    }
+  }
+  else if (list_size > sched_ctrl->sched_pucch_size) {
+    sched_ctrl->sched_pucch = realloc(sched_ctrl->sched_pucch, list_size * sizeof(*sched_ctrl->sched_pucch));
+    for(int i=sched_ctrl->sched_pucch_size; i<list_size; i++){
+      NR_sched_pucch_t *curr_pucch = &sched_ctrl->sched_pucch[i];
+      memset(curr_pucch, 0, sizeof(*curr_pucch));
+    }
+    sched_ctrl->sched_pucch_size = list_size;
+  }
+}
+
 void create_dl_harq_list(NR_UE_sched_ctrl_t *sched_ctrl,
                          const NR_PDSCH_ServingCellConfig_t *pdsch) {
   const int nrofHARQ = pdsch && pdsch->nrofHARQ_ProcessesForPDSCH ?
@@ -2672,23 +2714,17 @@ uint8_t nr_get_tpc(int target, uint8_t cqi, int incr) {
 
 void get_pdsch_to_harq_feedback(NR_PUCCH_Config_t *pucch_Config,
                                 nr_dci_format_t dci_format,
-                                int *max_fb_time,
                                 uint8_t *pdsch_to_harq_feedback) {
 
   if (dci_format == NR_DL_DCI_FORMAT_1_0) {
-    for (int i=0; i<8; i++) {
+    for (int i=0; i<8; i++)
       pdsch_to_harq_feedback[i] = i+1;
-      if(pdsch_to_harq_feedback[i]>*max_fb_time)
-        *max_fb_time = pdsch_to_harq_feedback[i];
-    }
   }
   else {
     AssertFatal(pucch_Config!=NULL,"pucch_Config shouldn't be null here\n");
     if(pucch_Config->dl_DataToUL_ACK != NULL) {
       for (int i=0; i<8; i++) {
         pdsch_to_harq_feedback[i] = *pucch_Config->dl_DataToUL_ACK->list.array[i];
-        if(pdsch_to_harq_feedback[i]>*max_fb_time)
-          *max_fb_time = pdsch_to_harq_feedback[i];
       }
     }
     else

openair2/LAYER2/NR_MAC_gNB/mac_proto.h

@@ -218,7 +218,6 @@ int nr_acknack_scheduling(int Mod_idP,
 
 void get_pdsch_to_harq_feedback(NR_PUCCH_Config_t *pucch_Config,
                                 nr_dci_format_t dci_format,
-                                int *max_fb_time,
                                 uint8_t *pdsch_to_harq_feedback);
   
 void nr_configure_css_dci_initial(nfapi_nr_dl_tti_pdcch_pdu_rel15_t* pdcch_pdu,
@@ -466,6 +465,10 @@ uint8_t get_mcs_from_cqi(int mcs_table, int cqi_table, int cqi_idx);
 
 uint8_t get_dl_nrOfLayers(const NR_UE_sched_ctrl_t *sched_ctrl, const nr_dci_format_t dci_format);
 
+void set_sched_pucch_list(NR_UE_sched_ctrl_t *sched_ctrl,
+                          NR_UE_UL_BWP_t *ul_bwp,
+                          NR_ServingCellConfigCommon_t *scc);
+
 const int get_dl_tda(const gNB_MAC_INST *nrmac, const NR_ServingCellConfigCommon_t *scc, int slot);
 const int get_ul_tda(const gNB_MAC_INST *nrmac, const NR_ServingCellConfigCommon_t *scc, int slot);
 
@@ -490,7 +493,7 @@ int get_mcs_from_bler(const NR_bler_options_t *bler_options,
 
 void UL_tti_req_ahead_initialization(gNB_MAC_INST * gNB, NR_ServingCellConfigCommon_t *scc, int n, int CCid);
 
-void nr_sr_reporting(gNB_MAC_INST *nrmac, frame_t frameP, sub_frame_t slotP);
+void nr_sr_reporting(gNB_MAC_INST *nrmac, frame_t frameP, sub_frame_t slotP, int mod_id);
 
 size_t dump_mac_stats(gNB_MAC_INST *gNB, char *output, size_t strlen, bool reset_rsrp);
 

openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h

@@ -123,6 +123,7 @@ typedef struct NR_UE_UL_BWP {
   uint8_t transform_precoding;
   uint8_t mcs_table;
   nr_dci_format_t dci_format;
+  int max_fb_time;
 } NR_UE_UL_BWP_t;
 
 typedef enum {
@@ -354,6 +355,7 @@ typedef struct UE_info {
 } NR_UE_mac_ce_ctrl_t;
 
 typedef struct NR_sched_pucch {
+  bool active;
   int frame;
   int ul_slot;
   bool sr_flag;
@@ -560,9 +562,11 @@ typedef struct {
   /// corresponding to the sched_pusch/sched_pdsch structures below
   int cce_index;
   uint8_t aggregation_level;
+
   /// PUCCH scheduling information. Array of two: HARQ+SR in the first field,
   /// CSI in second.  This order is important for nr_acknack_scheduling()!
-  NR_sched_pucch_t sched_pucch[2];
+  NR_sched_pucch_t *sched_pucch;
+  int sched_pucch_size;
 
   /// Sched PUSCH: scheduling decisions, copied into HARQ and cleared every TTI
   NR_sched_pusch_t sched_pusch;