improve function that map ro to ssb in the UE: make dynamic smaller memory...

improve function that map ro to ssb in the UE: make dynamic smaller memory allocation than array[max][max][.... Saves about 100MB of memory and avoid real time glitch of milli seconds of memset(110MB)

openair2/LAYER2/NR_MAC_COMMON/nr_mac.h

@@ -430,7 +430,7 @@ typedef struct prach_occasion_info {
 // PRACH occasion slot details
 // A PRACH occasion slot is a series of PRACH occasions in time (symbols) and frequency
 typedef struct prach_occasion_slot {
-  prach_occasion_info_t prach_occasion[MAX_TDM][MAX_FDM]; // Starting symbol of each PRACH occasions in a slot
+  prach_occasion_info_t *prach_occasion; // Starting symbol of each PRACH occasions in a slot
   uint8_t nb_of_prach_occasion_in_time;
   uint8_t nb_of_prach_occasion_in_freq;
 } prach_occasion_slot_t;

openair2/LAYER2/NR_MAC_UE/mac_defs.h

@@ -422,15 +422,14 @@ typedef struct prach_association_pattern {
 
 // SSB details
 typedef struct ssb_info {
-  bool transmitted; // True if the SSB index is transmitted according to the SSB positions map configuration
   prach_occasion_info_t *mapped_ro[MAX_NB_RO_PER_SSB_IN_ASSOCIATION_PATTERN]; // List of mapped RACH Occasions to this SSB index
   uint32_t nb_mapped_ro; // Total number of mapped ROs to this SSB index
 } ssb_info_t;
 
 // List of all the possible SSBs and their details
 typedef struct ssb_list_info {
-  ssb_info_t tx_ssb[MAX_NB_SSB];
-  uint8_t   nb_tx_ssb;
+  ssb_info_t *tx_ssb;
+  int nb_tx_ssb;
 } ssb_list_info_t;
 
 typedef struct nr_lcordered_info_s {

openair2/LAYER2/NR_MAC_UE/main_ue_nr.c

@@ -69,10 +69,8 @@ void nr_ue_init_mac(NR_UE_MAC_INST_t *mac)
 
   memset(&mac->ssb_measurements, 0, sizeof(mac->ssb_measurements));
   memset(&mac->ul_time_alignment, 0, sizeof(mac->ul_time_alignment));
-  for (int i = 0; i < MAX_NUM_BWP_UE; i++) {
-    memset(&mac->ssb_list[i], 0, sizeof(mac->ssb_list[i]));
-    memset(&mac->prach_assoc_pattern[i], 0, sizeof(mac->prach_assoc_pattern[i]));
-  }
+  memset(mac->ssb_list, 0, sizeof(mac->ssb_list));
+  memset(mac->prach_assoc_pattern, 0, sizeof(mac->prach_assoc_pattern));
   for (int k = 0; k < NR_MAX_HARQ_PROCESSES; k++) {
     mac->ul_harq_info[k].last_ndi = -1; // initialize to invalid value
     mac->dl_harq_info[k].last_ndi = -1; // initialize to invalid value
@@ -186,6 +184,14 @@ void reset_mac_inst(NR_UE_MAC_INST_t *nr_mac)
 
   // release, if any, Temporary C-RNTI
   nr_mac->ra.t_crnti = 0;
+  // free RACH structs
+  for (int i = 0; i < MAX_NUM_BWP_UE; i++) {
+    free(nr_mac->ssb_list[i].tx_ssb);
+    for (int j = 0; j < MAX_NB_PRACH_CONF_PERIOD_IN_ASSOCIATION_PATTERN_PERIOD; j++)
+      for (int k = 0; k < MAX_NB_FRAME_IN_PRACH_CONF_PERIOD; k++)
+        for (int l = 0; l < MAX_NB_SLOT_IN_FRAME; l++)
+          free(nr_mac->prach_assoc_pattern[i].prach_conf_period_list[j].prach_occasion_slot_map[k][l].prach_occasion);
+  }
 
   // reset BFI_COUNTER
   // TODO beam failure procedure not implemented

openair2/LAYER2/NR_MAC_UE/nr_ue_dci_configuration.c

@@ -436,15 +436,10 @@ bool monitior_dci_for_other_SI(NR_UE_MAC_INST_t *mac,
       for (int i = 0; i < duration; i++) {
         if (((frame * slots_per_frame + slot - offset - i) % period) == 0) {
           int N = mac->ssb_list[bwp_id].nb_tx_ssb;
-          int K = 0; // k_th transmitted SSB
-          for (int i = 0; i < mac->mib_ssb; i++) {
-            if(mac->ssb_list[bwp_id].tx_ssb[i].transmitted)
-              K++;
-          }
           // numbering current frame and slot in terms of monitoring occasions in window
           int current_monitor_occasion = ((abs_slot - mac->si_window_start) % period) +
                                          (duration * (abs_slot - mac->si_window_start) / period);
-          if (current_monitor_occasion % N == K)
+          if (current_monitor_occasion < N)
             return true;
           else
            return false;