fixed cce indexing to allow multiple pdcch on single coreset

openair1/PHY/NR_TRANSPORT/nr_dci.c

@@ -153,37 +153,23 @@ void nr_pdcch_scrambling(uint32_t *in,
   }
 }
 
-
-
-uint8_t nr_generate_dci_top(PHY_VARS_gNB *gNB,
-			    nfapi_nr_dl_tti_pdcch_pdu *pdcch_pdu,
-			    nfapi_nr_dl_tti_pdcch_pdu *ul_dci_pdu,
-                            uint32_t **gold_pdcch_dmrs,
-                            int32_t *txdataF,
-                            int16_t amp,
-                            NR_DL_FRAME_PARMS frame_parms) {
+uint8_t nr_generate_dci(PHY_VARS_gNB *gNB,
+                        nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu_rel15,
+                        uint32_t **gold_pdcch_dmrs,
+                        int32_t *txdataF,
+                        int16_t amp,
+                        NR_DL_FRAME_PARMS frame_parms) {
 
   int16_t mod_dmrs[NR_MAX_CSET_DURATION][NR_MAX_PDCCH_DMRS_LENGTH>>1] __attribute__((aligned(16))); // 3 for the max coreset duration
   uint16_t cset_start_sc;
   uint8_t cset_start_symb, cset_nsymb;
   int k,l,k_prime,dci_idx, dmrs_idx;
-  /*First iteration: single DCI*/
-
-  nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu_rel15=NULL;
-
 
   // find coreset descriptor
     
   int rb_offset;
   int n_rb;
 
-  AssertFatal(pdcch_pdu!=NULL || ul_dci_pdu!=NULL,"At least one pointer has to be !NULL\n");
-  AssertFatal(pdcch_pdu==NULL || ul_dci_pdu==NULL,"Can't handle both DL and UL DCI in same slot\n");
-
-
-  if (pdcch_pdu) pdcch_pdu_rel15 = &pdcch_pdu->pdcch_pdu_rel15;
-  else if (ul_dci_pdu) pdcch_pdu_rel15 = &ul_dci_pdu->pdcch_pdu_rel15;
-
   nr_fill_cce_list(gNB,0,pdcch_pdu_rel15);
 
   get_coreset_rballoc(pdcch_pdu_rel15->FreqDomainResource,&n_rb,&rb_offset);
@@ -333,3 +319,23 @@ uint8_t nr_generate_dci_top(PHY_VARS_gNB *gNB,
   return 0;
 }
 
+uint8_t nr_generate_dci_top(PHY_VARS_gNB *gNB,
+			    nfapi_nr_dl_tti_pdcch_pdu *pdcch_pdu,
+			    nfapi_nr_dl_tti_pdcch_pdu *ul_dci_pdu,
+                            uint32_t **gold_pdcch_dmrs,
+                            int32_t *txdataF,
+                            int16_t amp,
+                            NR_DL_FRAME_PARMS frame_parms) {
+
+  AssertFatal(pdcch_pdu!=NULL || ul_dci_pdu!=NULL,"At least one pointer has to be !NULL\n");
+
+  if (pdcch_pdu && ul_dci_pdu)
+    return (nr_generate_dci(gNB,&pdcch_pdu->pdcch_pdu_rel15,gold_pdcch_dmrs,txdataF,amp,frame_parms) ||
+            nr_generate_dci(gNB,&ul_dci_pdu->pdcch_pdu_rel15,gold_pdcch_dmrs,txdataF,amp,frame_parms));
+  else if (pdcch_pdu)
+    return nr_generate_dci(gNB,&pdcch_pdu->pdcch_pdu_rel15,gold_pdcch_dmrs,txdataF,amp,frame_parms);
+  else if (ul_dci_pdu)
+    return nr_generate_dci(gNB,&ul_dci_pdu->pdcch_pdu_rel15,gold_pdcch_dmrs,txdataF,amp,frame_parms);
+
+}
+

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c

@@ -465,6 +465,8 @@ void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
 
   memset(RC.nrmac[module_idP]->cce_list[bwp_id][0],0,MAX_NUM_CCE*sizeof(int)); // coreset0
   memset(RC.nrmac[module_idP]->cce_list[bwp_id][1],0,MAX_NUM_CCE*sizeof(int)); // coresetid 1
+  for (int i=0; i<MAX_NUM_CORESET; i++)
+    RC.nrmac[module_idP]->UE_list.num_pdcch_cand[UE_id][i] = 0;
   for (CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
     //mbsfn_status[CC_id] = 0;
 
@@ -508,6 +510,7 @@ void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
 
   // This schedule RA procedure if not in phy_test mode
   // Otherwise already consider 5G already connected
+  RC.nrmac[module_idP]->current_slot=slot;
   if (get_softmodem_params()->phy_test == 0) {
     nr_schedule_RA(module_idP, frame, slot);
     nr_schedule_reception_msg3(module_idP, 0, frame, slot);

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c

@@ -418,7 +418,7 @@ int configure_fapi_dl_pdu(int Mod_idP,
 
   int ret = nr_configure_pdcch(nr_mac,
                                pdcch_pdu_rel15,
-                               UE_list->rnti[UE_id],
+                               UE_id,
 		               1, // ue-specific
 		               ss,
 		               scc,

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -133,7 +133,7 @@ int allocate_nr_CCEs(gNB_MAC_INST *nr_mac,
 		     int aggregation,
 		     int search_space, // 0 common, 1 ue-specific
 		     int UE_id,
-		     int m) {
+		     int nr_of_candidates) {
   // uncomment these when we allocate for common search space
   //  NR_COMMON_channels_t                *cc      = nr_mac->common_channels;
   //  NR_ServingCellConfigCommon_t        *scc     = cc->ServingCellConfigCommon;
@@ -169,16 +169,19 @@ int allocate_nr_CCEs(gNB_MAC_INST *nr_mac,
   uint16_t N_reg = n_rb * coreset->duration;
   uint16_t Y=0, N_cce, M_s_max, n_CI=0;
   uint16_t n_RNTI = search_space == 1 ? UE_list->rnti[UE_id]:0;
-  uint32_t A[3]={39827,39829,39839};
 
   N_cce = N_reg / NR_NB_REG_PER_CCE;
 
-  M_s_max = (aggregation==4)?4:(aggregation==8)?2:1;
+  M_s_max = nr_of_candidates;
 
   if (search_space == 1) {
-    Y = (A[0]*n_RNTI)%65537; // Candidate 0, antenna port 0
+    Y = UE_list->Y[UE_id][coreset_id][nr_mac->current_slot];
   }
-  int first_cce = aggregation * (( Y + (m*N_cce)/(aggregation*M_s_max) + n_CI ) % CEILIDIV(N_cce,aggregation));
+
+  int m = nr_mac->UE_list.num_pdcch_cand[UE_id][coreset_id];
+  AssertFatal(m<nr_of_candidates, "PDCCH candidate index %d for RNTI %d in CORESET %d exceeds the maximum number of PDCCH candidates (%d) for the search space %d\n",m,n_RNTI,coreset_id,nr_of_candidates,search_space);
+
+  int first_cce = aggregation * (( Y + CEILIDIV((m*N_cce),(aggregation*M_s_max)) + n_CI ) % CEILIDIV(N_cce,aggregation));
 
   for (int i=0;i<aggregation;i++)
     if (cce_list[first_cce+i] != 0) return(-1);
@@ -409,7 +412,7 @@ void nr_configure_css_dci_initial(nfapi_nr_dl_tti_pdcch_pdu_rel15_t* pdcch_pdu,
 
 int nr_configure_pdcch(gNB_MAC_INST *nr_mac,
                        nfapi_nr_dl_tti_pdcch_pdu_rel15_t* pdcch_pdu,
-                       uint16_t rnti,
+                       int UE_id,
                        int ss_type,
                        NR_SearchSpace_t *ss,
                        NR_ServingCellConfigCommon_t *scc,
@@ -418,6 +421,7 @@ int nr_configure_pdcch(gNB_MAC_INST *nr_mac,
   int CCEIndex = -1;
   int cid = 0;
   NR_ControlResourceSet_t *coreset = NULL;
+  uint16_t rnti = nr_mac->UE_list.rnti[UE_id];
 
   if (bwp) { // This is not the InitialBWP
     NR_ControlResourceSet_t *temp_coreset;
@@ -517,8 +521,8 @@ int nr_configure_pdcch(gNB_MAC_INST *nr_mac,
                                 cid,
                                 aggregation_level,
                                 ss->searchSpaceType->present-1, // search_space, 0 common, 1 ue-specific
-                                0, // UE-id
-                                0); // m
+                                UE_id,
+                                nr_of_candidates); 
 
     if (CCEIndex<0)
      return (CCEIndex);
@@ -531,6 +535,7 @@ int nr_configure_pdcch(gNB_MAC_INST *nr_mac,
 
     pdcch_pdu->dci_pdu.powerControlOffsetSS[pdcch_pdu->numDlDci]=1;
     pdcch_pdu->numDlDci++;
+    nr_mac->UE_list.num_pdcch_cand[UE_id][coresetid]++;
     return (0);
   }
   else { // this is for InitialBWP
@@ -1437,6 +1442,22 @@ int find_nr_UE_id(module_id_t mod_idP, rnti_t rntiP)
   return -1;
 }
 
+void set_Y(NR_UE_list_t *UE_list, int UE_id) {
+  int A[3] = {39827,39829,39839};
+  int D = 65537;
+  int s = 0;
+
+  UE_list->Y[UE_id][0][s] = (A[0]*UE_list->rnti[UE_id]) % D;
+  UE_list->Y[UE_id][1][s] = (A[1]*UE_list->rnti[UE_id]) % D;
+  UE_list->Y[UE_id][2][s] = (A[2]*UE_list->rnti[UE_id]) % D;
+
+  for (s=1; s<160; s++) {
+    UE_list->Y[UE_id][0][s] = (A[0]*UE_list->Y[UE_id][0][s-1]) % D;
+    UE_list->Y[UE_id][1][s] = (A[1]*UE_list->Y[UE_id][1][s-1]) % D;
+    UE_list->Y[UE_id][2][s] = (A[2]*UE_list->Y[UE_id][2][s-1]) % D;
+  }
+}
+
 int add_new_nr_ue(module_id_t mod_idP, rnti_t rntiP){
 
   int UE_id;
@@ -1462,6 +1483,7 @@ int add_new_nr_ue(module_id_t mod_idP, rnti_t rntiP){
     UE_list->num_UEs++;
     UE_list->active[UE_id] = TRUE;
     UE_list->rnti[UE_id] = rntiP;
+    set_Y(UE_list,UE_id);
     memset((void *) &UE_list->UE_sched_ctrl[UE_id],
            0,
            sizeof(NR_UE_sched_ctrl_t));

openair2/LAYER2/NR_MAC_gNB/mac_proto.h

@@ -213,7 +213,7 @@ void find_search_space(int ss_type,
 
 int nr_configure_pdcch(gNB_MAC_INST *nr_mac,
                        nfapi_nr_dl_tti_pdcch_pdu_rel15_t* pdcch_pdu,
-                       uint16_t rnti,
+                       int UE_id,
                        int ss_type,
                        NR_SearchSpace_t *ss,
                        NR_ServingCellConfigCommon_t *scc,
@@ -271,7 +271,7 @@ int allocate_nr_CCEs(gNB_MAC_INST *nr_mac,
                      int aggregation,
                      int search_space, // 0 common, 1 ue-specific
                      int UE_id,
-                     int m
+                     int nr_of_candidates
                      );
 
 int get_dlscs(nfapi_nr_config_request_t *cfg);

openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h

@@ -335,6 +335,10 @@ typedef struct {
   rnti_t tc_rnti[MAX_MOBILES_PER_GNB];
   NR_preamble_ue preambles[MAX_MOBILES_PER_GNB];
   NR_CellGroupConfig_t *secondaryCellGroup[MAX_MOBILES_PER_GNB];
+  /// CCE indexing
+  int Y[MAX_MOBILES_PER_GNB][3][160];
+  int m[MAX_MOBILES_PER_GNB];
+  int num_pdcch_cand[MAX_MOBILES_PER_GNB][MAX_NUM_CORESET];
 } NR_UE_list_t;
 
 /*! \brief top level eNB MAC structure */
@@ -401,6 +405,8 @@ typedef struct gNB_MAC_INST_s {
   time_stats_t schedule_pch;
   /// CCE lists
   int cce_list[MAX_NUM_BWP][MAX_NUM_CORESET][MAX_NUM_CCE];
+  /// current slot
+  int current_slot;
 } gNB_MAC_INST;
 
 #endif /*__LAYER2_NR_MAC_GNB_H__ */