fixed cce indexing to allow multiple pdcch on single coreset

openair1/PHY/NR_TRANSPORT/nr_dci.c

@@ -64,37 +64,23 @@ 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);
@@ -244,3 +230,23 @@ 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

@@ -440,6 +440,8 @@ 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_info.num_pdcch_cand[UE_id][i] = 0;
   for (int CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
     //mbsfn_status[CC_id] = 0;
 
@@ -469,6 +471,7 @@ 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_RA.c

@@ -674,13 +674,13 @@ void nr_generate_Msg2(module_id_t module_idP,
     uint8_t nr_of_candidates, aggregation_level;
     find_aggregation_candidates(&aggregation_level, &nr_of_candidates, ss);
     NR_ControlResourceSet_t *coreset = get_coreset(bwp, ss, 0 /* common */);
-    int CCEIndex = allocate_nr_CCEs(
-        nr_mac,
-        bwp,
-        coreset,
-        aggregation_level,
-        0, /* n_RNTI 0: common search space */
-        0); // m
+    int CCEIndex = allocate_nr_CCEs(nr_mac,
+                                    bwp,
+                                    coreset,
+                                    aggregation_level,
+                                    0, // Y
+                                    0, // m
+                                    nr_of_candidates);
 
     if (CCEIndex < 0) {
       LOG_E(MAC, "%s(): cannot find free CCE for RA RNTI %04x!\n", __func__, ra->rnti);

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c

@@ -488,16 +488,21 @@ void nr_simple_dlsch_preprocessor(module_id_t module_id,
                               sched_ctrl->search_space);
   sched_ctrl->coreset = get_coreset(
       sched_ctrl->active_bwp, sched_ctrl->search_space, 1 /* dedicated */);
+  int cid = sched_ctrl->coreset->controlResourceSetId;
+  const uint16_t Y = UE_info->Y[UE_id][cid][slot];
+  const int m = UE_info->num_pdcch_cand[UE_id][cid];
   sched_ctrl->cce_index = allocate_nr_CCEs(RC.nrmac[module_id],
-                                  sched_ctrl->active_bwp,
-                                  sched_ctrl->coreset,
-                                  sched_ctrl->aggregation_level,
-                                  UE_info->rnti[UE_id],
-                                  0); // m
+                                           sched_ctrl->active_bwp,
+                                           sched_ctrl->coreset,
+                                           sched_ctrl->aggregation_level,
+                                           Y,
+                                           m,
+                                           nr_of_candidates);
   if (sched_ctrl->cce_index < 0) {
     LOG_E(MAC, "%s(): could not find CCE for UE %d\n", __func__, UE_id);
     return;
   }
+  UE_info->num_pdcch_cand[UE_id][cid]++;
 
   /* Find PUCCH occasion */
   nr_update_pucch_scheduling(

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c

@@ -417,18 +417,23 @@ int configure_fapi_dl_pdu_phytest(int Mod_idP,
   uint8_t nr_of_candidates, aggregation_level;
   find_aggregation_candidates(&aggregation_level, &nr_of_candidates, ss);
   NR_ControlResourceSet_t *coreset = get_coreset(bwp, ss, 1 /* dedicated */);
-  int CCEIndex = allocate_nr_CCEs(
-      nr_mac,
-      bwp,
-      coreset,
-      aggregation_level,
-      UE_info->rnti[UE_id],
-      0); // m
+  const int cid = coreset->controlResourceSetId;
+  const uint16_t Y = UE_info->Y[UE_id][cid][nr_mac->current_slot];
+  const int m = UE_info->num_pdcch_cand[UE_id][cid];
+  int CCEIndex = allocate_nr_CCEs(nr_mac,
+                                  bwp,
+                                  coreset,
+                                  aggregation_level,
+                                  Y,
+                                  m,
+                                  nr_of_candidates);
   if (CCEIndex < 0) {
     LOG_E(MAC, "%s(): CCE list not empty, couldn't schedule PDSCH\n", __func__);
     free(dci_pdu_rel15);
     return 0;
   }
+  UE_info->num_pdcch_cand[UE_id][cid]++;
+
   nr_configure_pdcch(nr_mac,
                      pdcch_pdu_rel15,
                      UE_info->rnti[UE_id],
@@ -1126,19 +1131,23 @@ void schedule_fapi_ul_pdu(int Mod_idP,
     uint8_t nr_of_candidates, aggregation_level;
     find_aggregation_candidates(&aggregation_level, &nr_of_candidates, ss);
     NR_ControlResourceSet_t *coreset = get_coreset(bwp, ss, 1 /* dedicated */);
-    int CCEIndex = allocate_nr_CCEs(
-        nr_mac,
-        bwp,
-        coreset,
-        aggregation_level,
-        UE_info->rnti[UE_id],
-        0); // m
+    const int cid = coreset->controlResourceSetId;
+    const uint16_t Y = UE_info->Y[UE_id][cid][nr_mac->current_slot];
+    const int m = UE_info->num_pdcch_cand[UE_id][cid];
+    int CCEIndex = allocate_nr_CCEs(nr_mac,
+                                    bwp,
+                                    coreset,
+                                    aggregation_level,
+                                    Y,
+                                    m,
+                                    nr_of_candidates);
     if (CCEIndex < 0) {
       LOG_E(MAC, "%s(): CCE list not empty, couldn't schedule PUSCH\n", __func__);
       pusch_sched->active = false;
       return;
     }
     else {
+      UE_info->num_pdcch_cand[UE_id][cid]++;
       nr_configure_pdcch(nr_mac,
                          pdcch_pdu_rel15,
                          UE_info->rnti[UE_id],

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -172,8 +172,9 @@ int allocate_nr_CCEs(gNB_MAC_INST *nr_mac,
                      NR_BWP_Downlink_t *bwp,
                      NR_ControlResourceSet_t *coreset,
                      int aggregation,
-                     uint16_t n_RNTI,
-                     int m) {
+                     uint16_t Y,
+                     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;
@@ -189,15 +190,19 @@ int allocate_nr_CCEs(gNB_MAC_INST *nr_mac,
   n_rb*=6;
 
   uint16_t N_reg = n_rb * coreset->duration;
-  uint16_t n_CI=0;
-  const uint32_t A[3]={39827,39829,39839};
-  /* if n_RNTI is zero, this results in zero, too! */
-  uint16_t Y = (A[0]*n_RNTI)%65537; // Candidate 0, antenna port 0
+  uint16_t n_CI = 0;
 
-  uint16_t N_cce = N_reg / NR_NB_REG_PER_CCE;
+  const uint16_t N_cce = N_reg / NR_NB_REG_PER_CCE;
+  const uint16_t M_s_max = nr_of_candidates;
 
-  uint16_t M_s_max = (aggregation==4)?4:(aggregation==8)?2:1;
-  int first_cce = aggregation * (( Y + (m*N_cce)/(aggregation*M_s_max) + n_CI ) % CEILIDIV(N_cce,aggregation));
+  AssertFatal(m < nr_of_candidates,
+              "PDCCH candidate index %d in CORESET %d exceeds the maximum "
+              "number of PDCCH candidates (%d)\n",
+              m,
+              coreset_id,
+              nr_of_candidates);
+
+  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);
@@ -1619,6 +1624,22 @@ 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){
 
   NR_UE_info_t *UE_info = &RC.nrmac[mod_idP]->UE_info;
@@ -1642,6 +1663,7 @@ int add_new_nr_ue(module_id_t mod_idP, rnti_t rntiP){
     UE_info->active[UE_id] = true;
     UE_info->rnti[UE_id] = rntiP;
     add_nr_ue_list(&UE_info->list, UE_id);
+    set_Y(UE_info, UE_id);
     memset((void *) &UE_info->UE_sched_ctrl[UE_id],
            0,
            sizeof(NR_UE_sched_ctrl_t));

openair2/LAYER2/NR_MAC_gNB/mac_proto.h

@@ -314,8 +314,9 @@ int allocate_nr_CCEs(gNB_MAC_INST *nr_mac,
                      NR_BWP_Downlink_t *bwp,
                      NR_ControlResourceSet_t *coreset,
                      int aggregation,
-                     uint16_t n_RNTI,
-                     int m);
+                     uint16_t Y,
+                     int m,
+                     int nr_of_candidates);
 
 int get_dlscs(nfapi_nr_config_request_t *cfg);
 

openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h

@@ -380,6 +380,10 @@ typedef struct {
   bool active[MAX_MOBILES_PER_GNB];
   rnti_t rnti[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_info_t;
 
 /*! \brief top level eNB MAC structure */
@@ -442,6 +446,8 @@ 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__ */