compute Y every time

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c

@@ -613,7 +613,7 @@ bool allocate_dl_retransmission(module_id_t module_id,
 
   /* Find a free CCE */
   const int cid = sched_ctrl->coreset->controlResourceSetId;
-  const uint16_t Y = RC.nrmac[module_id]->UE_info.Y[UE_id][cid%3][slot];
+  const uint16_t Y = get_Y(cid%3, slot, UE_info->rnti[UE_id]);
   uint8_t nr_of_candidates;
   for (int i=0; i<5; i++) {
     // for now taking the lowest value among the available aggregation levels
@@ -775,7 +775,7 @@ void pf_dl(module_id_t module_id,
 
     /* Find a free CCE */
     const int cid = sched_ctrl->coreset->controlResourceSetId;
-    const uint16_t Y = RC.nrmac[module_id]->UE_info.Y[UE_id][cid%3][slot];
+    const uint16_t Y = get_Y(cid%3, slot, UE_info->rnti[UE_id]);
     uint8_t nr_of_candidates;
     for (int i=0; i<5; i++) {
       // for now taking the lowest value among the available aggregation levels

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c

@@ -345,7 +345,7 @@ void nr_preprocessor_phytest(module_id_t module_id,
   AssertFatal(nr_of_candidates>0,"nr_of_candidates is 0\n");
 
   const int cid = sched_ctrl->coreset->controlResourceSetId;
-  const uint16_t Y = UE_info->Y[UE_id][cid%3][slot];
+  const uint16_t Y = get_Y(cid%3, slot, UE_info->rnti[UE_id]);
 
   int CCEIndex = find_pdcch_candidate(RC.nrmac[module_id],
                                       CC_id,
@@ -511,7 +511,7 @@ bool nr_ul_preprocessor_phytest(module_id_t module_id, frame_t frame, sub_frame_
   AssertFatal(nr_of_candidates>0,"nr_of_candidates is 0\n");
 
   const int cid = sched_ctrl->coreset->controlResourceSetId;
-  const uint16_t Y = UE_info->Y[UE_id][cid%3][slot];
+  const uint16_t Y = get_Y(cid%3, slot, UE_info->rnti[UE_id]);
 
   int CCEIndex = find_pdcch_candidate(nr_mac,
                                       CC_id,

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -1936,19 +1936,18 @@ int find_nr_UE_id(module_id_t mod_idP, rnti_t rntiP)
   return -1;
 }
 
-void set_Y(int Y[3][160], rnti_t rnti) {
+uint16_t get_Y(int cid, int slot, rnti_t rnti) {
+
   const int A[3] = {39827, 39829, 39839};
   const int D = 65537;
+  int Y;
 
-  Y[0][0] = (A[0] * rnti) % D;
-  Y[1][0] = (A[1] * rnti) % D;
-  Y[2][0] = (A[2] * rnti) % D;
+  Y = (A[cid] * rnti) % D;
 
-  for (int s = 1; s < 160; s++) {
-    Y[0][s] = (A[0] * Y[0][s - 1]) % D;
-    Y[1][s] = (A[1] * Y[1][s - 1]) % D;
-    Y[2][s] = (A[2] * Y[2][s - 1]) % D;
-  }
+  for (int s = 0; s < slot; s++)
+    Y = (A[cid] * Y) % D;
+
+  return Y;
 }
 
 int find_nr_RA_id(module_id_t mod_idP, int CC_idP, rnti_t rntiP) {
@@ -2032,7 +2031,6 @@ int add_new_nr_ue(module_id_t mod_idP, rnti_t rntiP, NR_CellGroupConfig_t *CellG
     UE_info->CellGroup[UE_id] = CellGroup;
     add_nr_list(&UE_info->list, UE_id);
     memset(&UE_info->mac_stats[UE_id], 0, sizeof(NR_mac_stats_t));
-    set_Y(UE_info->Y[UE_id], rntiP);
     if (CellGroup && CellGroup->spCellConfig && CellGroup->spCellConfig && CellGroup->spCellConfig->spCellConfigDedicated)
       compute_csi_bitlen (CellGroup->spCellConfig->spCellConfigDedicated->csi_MeasConfig->choice.setup, UE_info, UE_id, mod_idP);
     NR_UE_sched_ctrl_t *sched_ctrl = &UE_info->UE_sched_ctrl[UE_id];

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c

@@ -1012,7 +1012,7 @@ bool allocate_ul_retransmission(module_id_t module_id,
 
   /* Find a free CCE */
   const int cid = sched_ctrl->coreset->controlResourceSetId;
-  const uint16_t Y = RC.nrmac[module_id]->UE_info.Y[UE_id][cid%3][slot];
+  const uint16_t Y = get_Y(cid%3, slot, UE_info->rnti[UE_id]);
   uint8_t nr_of_candidates;
   for (int i=0; i<5; i++) {
     // for now taking the lowest value among the available aggregation levels
@@ -1158,7 +1158,7 @@ void pf_ul(module_id_t module_id,
       /* if no data, pre-allocate 5RB */
       /* Find a free CCE */
       const int cid = sched_ctrl->coreset->controlResourceSetId;
-      const uint16_t Y = RC.nrmac[module_id]->UE_info.Y[UE_id][cid%3][slot];
+      const uint16_t Y = get_Y(cid%3, slot, UE_info->rnti[UE_id]);
       uint8_t nr_of_candidates;
       for (int i=0; i<5; i++) {
         // for now taking the lowest value among the available aggregation levels
@@ -1268,7 +1268,7 @@ void pf_ul(module_id_t module_id,
     NR_UE_sched_ctrl_t *sched_ctrl = &UE_info->UE_sched_ctrl[UE_id];
 
     const int cid = sched_ctrl->coreset->controlResourceSetId;
-    const uint16_t Y = RC.nrmac[module_id]->UE_info.Y[UE_id][cid%3][slot];
+    const uint16_t Y = get_Y(cid%3, slot, UE_info->rnti[UE_id]);
     uint8_t nr_of_candidates;
     for (int i=0; i<5; i++) {
       // for now taking the lowest value among the available aggregation levels

openair2/LAYER2/NR_MAC_gNB/mac_proto.h

@@ -318,6 +318,8 @@ void nr_set_pusch_semi_static(const NR_ServingCellConfigCommon_t *scc,
                               uint8_t num_dmrs_cdm_grps_no_data,
                               NR_pusch_semi_static_t *ps);
 
+uint16_t get_Y(int cid, int slot, rnti_t rnti);
+
 uint8_t nr_get_tpc(int target, uint8_t cqi, int incr);
 
 int get_spf(nfapi_nr_config_request_scf_t *cfg);

openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h

@@ -669,7 +669,6 @@ typedef struct {
   rnti_t rnti[MAX_MOBILES_PER_GNB];
   NR_CellGroupConfig_t *CellGroup[MAX_MOBILES_PER_GNB];
   /// CCE indexing
-  int Y[MAX_MOBILES_PER_GNB][3][160];
   int m[MAX_MOBILES_PER_GNB];
   // UE selected beam index
   uint8_t UE_beam_index[MAX_MOBILES_PER_GNB];