Rebased to latest develop and removed nr_rx_acknack function

openair2/LAYER2/NR_MAC_gNB/config.c

@@ -392,6 +392,8 @@ int rrc_mac_config_req_gNB(module_id_t Mod_idP,
   
   if (secondaryCellGroup) {
 
+    RC.nrmac[Mod_idP]->secondaryCellGroupCommon = secondaryCellGroup;
+
     NR_UE_info_t *UE_info = &RC.nrmac[Mod_idP]->UE_info;
     if (add_ue == 1 && get_softmodem_params()->phy_test) {
       const int UE_id = add_new_nr_ue(Mod_idP, rnti, secondaryCellGroup);

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c

@@ -89,8 +89,7 @@ void dump_mac_stats(gNB_MAC_INST *gNB)
   }
 }
 
-
-void clear_nr_nfapi_information(gNB_MAC_INST *gNB,
+void clear_nr_nfapi_information(gNB_MAC_INST * gNB,
                                 int CC_idP,
                                 frame_t frameP,
                                 sub_frame_t slotP){
@@ -103,6 +102,7 @@ void clear_nr_nfapi_information(gNB_MAC_INST *gNB,
       &gNB->UL_tti_req_ahead[CC_idP][(slotP + num_slots - 1) % num_slots];
   nfapi_nr_ul_dci_request_t    *UL_dci_req = &gNB->UL_dci_req[0];
   nfapi_nr_tx_data_request_t   *TX_req = &gNB->TX_req[0];
+
   gNB->pdu_index[CC_idP] = 0;
 
   if (NFAPI_MODE == NFAPI_MONOLITHIC || NFAPI_MODE == NFAPI_MODE_PNF) { // monolithic or PNF
@@ -131,6 +131,7 @@ void clear_nr_nfapi_information(gNB_MAC_INST *gNB,
     gNB->UL_tti_req[CC_idP] = &gNB->UL_tti_req_ahead[CC_idP][slotP];
 
     TX_req[CC_idP].Number_of_PDUs                  = 0;
+
   }
 }
 /*
@@ -294,11 +295,11 @@ void schedule_nr_SRS(module_id_t module_idP, frame_t frameP, sub_frame_t subfram
 }
 */
 
+
 bool is_xlsch_in_slot(uint64_t bitmap, sub_frame_t slot) {
   return (bitmap >> slot) & 0x01;
 }
 
-
 void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
                                frame_t frame,
                                sub_frame_t slot){
@@ -358,6 +359,7 @@ void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
 
   start_meas(&RC.nrmac[module_idP]->eNB_scheduler);
   VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_gNB_DLSCH_ULSCH_SCHEDULER,VCD_FUNCTION_IN);
+
   pdcp_run(&ctxt);
   /* send tick to RLC and RRC every ms */
   if ((slot & ((1 << *scc->ssbSubcarrierSpacing) - 1)) == 0) {
@@ -394,6 +396,7 @@ void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
 
   if ((slot == 0) && (frame & 127) == 0) dump_mac_stats(RC.nrmac[module_idP]);
 
+
   // This schedules MIB
   schedule_nr_mib(module_idP, frame, slot, nr_slots_per_frame[*scc->ssbSubcarrierSpacing]);
 
@@ -442,5 +445,6 @@ void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
   nr_schedule_pucch(module_idP, frame, slot);
 
   stop_meas(&RC.nrmac[module_idP]->eNB_scheduler);
+  
   VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_gNB_DLSCH_ULSCH_SCHEDULER,VCD_FUNCTION_OUT);
 }

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -1638,7 +1638,7 @@ int add_new_nr_ue(module_id_t mod_idP, rnti_t rntiP, NR_CellGroupConfig_t *secon
     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);
-    compute_csi_bitlen(secondaryCellGroup, UE_info, UE_id);
+    compute_csi_bitlen (secondaryCellGroup->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];
     memset(sched_ctrl, 0, sizeof(*sched_ctrl));
     sched_ctrl->ta_frame = 0;

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_uci.c

@@ -514,7 +514,7 @@ void nr_csi_meas_reporting(int Mod_idP,
       curr_pucch->ul_slot = sched_slot;
       curr_pucch->resource_indicator = res_index;
       curr_pucch->csi_bits +=
-          nr_get_csi_bitlen(&UE_info->csi_report_template[UE_id][csi_report_id]);
+          nr_get_csi_bitlen(Mod_idP,UE_id,csi_report_id);
 
       // going through the list of PUCCH resources to find the one indexed by resource_id
       uint16_t *vrb_map_UL = &RC.nrmac[Mod_idP]->common_channels[0].vrb_map_UL[sched_slot * MAX_BWP_SIZE];
@@ -947,99 +947,6 @@ void extract_pucch_csi_report (NR_CSI_MeasConfig_t *csi_MeasConfig,
 
 }
 
-void nr_rx_acknack(nfapi_nr_uci_pusch_pdu_t *uci_pusch,
-                   const nfapi_nr_uci_pucch_pdu_format_0_1_t *uci_01,
-                   const nfapi_nr_uci_pucch_pdu_format_2_3_4_t *uci_234,
-                   slot_t slot, NR_UE_sched_ctrl_t *sched_ctrl, NR_mac_stats_t *stats) {
-
-  // TODO
-  int max_harq_rounds = 4; // TODO define macro
-
-  if (uci_01 != NULL) {
-    // handle harq
-    int harq_idx_s = 0;
-
-    // iterate over received harq bits
-    for (int harq_bit = 0; harq_bit < uci_01->harq->num_harq; harq_bit++) {
-      // search for the right harq process
-      for (int harq_idx = harq_idx_s; harq_idx < NR_MAX_NB_HARQ_PROCESSES; harq_idx++) {
-        // if the gNB received ack with a good confidence
-        if ((slot-1) == sched_ctrl->harq_processes[harq_idx].feedback_slot) {
-          if ((uci_01->harq->harq_list[harq_bit].harq_value == 1) &&
-              (uci_01->harq->harq_confidence_level == 0)) {
-            // toggle NDI and reset round
-            sched_ctrl->harq_processes[harq_idx].ndi ^= 1;
-            sched_ctrl->harq_processes[harq_idx].round = 0;
-          }
-          else
-            sched_ctrl->harq_processes[harq_idx].round++;
-          sched_ctrl->harq_processes[harq_idx].is_waiting = 0;
-          harq_idx_s = harq_idx + 1;
-          // if the max harq rounds was reached
-          if (sched_ctrl->harq_processes[harq_idx].round == max_harq_rounds) {
-            sched_ctrl->harq_processes[harq_idx].ndi ^= 1;
-            sched_ctrl->harq_processes[harq_idx].round = 0;
-            stats->dlsch_errors++;
-          }
-          break;
-        }
-        // if feedback slot processing is aborted
-        else if (((slot-1) > sched_ctrl->harq_processes[harq_idx].feedback_slot) &&
-                 (sched_ctrl->harq_processes[harq_idx].is_waiting)) {
-          sched_ctrl->harq_processes[harq_idx].round++;
-          if (sched_ctrl->harq_processes[harq_idx].round == max_harq_rounds) {
-            sched_ctrl->harq_processes[harq_idx].ndi ^= 1;
-            sched_ctrl->harq_processes[harq_idx].round = 0;
-          }
-          sched_ctrl->harq_processes[harq_idx].is_waiting = 0;
-        }
-      }
-    }
-  }
-
-  if (uci_234 != NULL) {
-    int harq_idx_s = 0;
-    int acknack;
-
-    // iterate over received harq bits
-    for (int harq_bit = 0; harq_bit < uci_234->harq.harq_bit_len; harq_bit++) {
-      acknack = ((uci_234->harq.harq_payload[harq_bit>>3])>>harq_bit)&0x01;
-      for (int harq_idx = harq_idx_s; harq_idx < NR_MAX_NB_HARQ_PROCESSES-1; harq_idx++) {
-        // if the gNB received ack with a good confidence or if the max harq rounds was reached
-        if ((slot-1) == sched_ctrl->harq_processes[harq_idx].feedback_slot) {
-          // TODO add some confidence level for when there is no CRC
-          if ((uci_234->harq.harq_crc != 1) && acknack) {
-            // toggle NDI and reset round
-            sched_ctrl->harq_processes[harq_idx].ndi ^= 1;
-            sched_ctrl->harq_processes[harq_idx].round = 0;
-          }
-          else
-            sched_ctrl->harq_processes[harq_idx].round++;
-          sched_ctrl->harq_processes[harq_idx].is_waiting = 0;
-          harq_idx_s = harq_idx + 1;
-          // if the max harq rounds was reached
-          if (sched_ctrl->harq_processes[harq_idx].round == max_harq_rounds) {
-            sched_ctrl->harq_processes[harq_idx].ndi ^= 1;
-            sched_ctrl->harq_processes[harq_idx].round = 0;
-            stats->dlsch_errors++;
-          }
-          break;
-        }
-        // if feedback slot processing is aborted
-        else if (((slot-1) > sched_ctrl->harq_processes[harq_idx].feedback_slot) &&
-                 (sched_ctrl->harq_processes[harq_idx].is_waiting)) {
-          sched_ctrl->harq_processes[harq_idx].round++;
-          if (sched_ctrl->harq_processes[harq_idx].round == max_harq_rounds) {
-            sched_ctrl->harq_processes[harq_idx].ndi ^= 1;
-            sched_ctrl->harq_processes[harq_idx].round = 0;
-          }
-          sched_ctrl->harq_processes[harq_idx].is_waiting = 0;
-        }
-      }
-    }
-  }
-}
-
 void handle_nr_uci_pucch_0_1(module_id_t mod_id,
                              frame_t frame,
                              sub_frame_t slot,
@@ -1058,8 +965,37 @@ void handle_nr_uci_pucch_0_1(module_id_t mod_id,
                                 uci_01->ul_cqi,
                                 30);
 
+  NR_ServingCellConfigCommon_t *scc = RC.nrmac[mod_id]->common_channels->ServingCellConfigCommon;
+  const int num_slots = nr_slots_per_frame[*scc->ssbSubcarrierSpacing];
   if (((uci_01->pduBitmap >> 1) & 0x01)) {
-    nr_rx_acknack(NULL,uci_01,NULL,slot,sched_ctrl,&UE_info->mac_stats[0]);
+    // iterate over received harq bits
+    for (int harq_bit = 0; harq_bit < uci_01->harq->num_harq; harq_bit++) {
+      const uint8_t harq_value = uci_01->harq->harq_list[harq_bit].harq_value;
+      const uint8_t harq_confidence = uci_01->harq->harq_confidence_level;
+      const int feedback_slot = (slot - 1 + num_slots) % num_slots;
+      /* In case of realtime problems: we can only identify a HARQ process by
+       * timing. If the HARQ process's feedback_slot is not the one we
+       * expected, we assume that processing has been aborted and we need to
+       * skip this HARQ process, which is what happens in the loop below. If
+       * you don't experience real-time problems, you might simply revert the
+       * commit that introduced these changes. */
+      int8_t pid = sched_ctrl->feedback_dl_harq.head;
+      DevAssert(pid >= 0);
+      while (sched_ctrl->harq_processes[pid].feedback_slot != feedback_slot) {
+        LOG_W(MAC,
+              "expected feedback slot %d, but found %d instead\n",
+              sched_ctrl->harq_processes[pid].feedback_slot,
+              feedback_slot);
+        remove_front_nr_list(&sched_ctrl->feedback_dl_harq);
+        handle_dl_harq(mod_id, UE_id, pid, 0);
+        pid = sched_ctrl->feedback_dl_harq.head;
+        DevAssert(pid >= 0);
+      }
+      remove_front_nr_list(&sched_ctrl->feedback_dl_harq);
+      NR_UE_harq_t *harq = &sched_ctrl->harq_processes[pid];
+      DevAssert(harq->is_waiting);
+      handle_dl_harq(mod_id, UE_id, pid, harq_value == 1 && harq_confidence == 0);
+    }
   }
 }
 
@@ -1082,95 +1018,251 @@ void handle_nr_uci_pucch_2_3_4(module_id_t mod_id,
                                 uci_234->ul_cqi,
                                 30);
 
+  NR_ServingCellConfigCommon_t *scc = RC.nrmac[mod_id]->common_channels->ServingCellConfigCommon;
+  const int num_slots = nr_slots_per_frame[*scc->ssbSubcarrierSpacing];
   if ((uci_234->pduBitmap >> 1) & 0x01) {
-    nr_rx_acknack(NULL,NULL,uci_234,slot,sched_ctrl,&UE_info->mac_stats[0]);
-     //API to parse the csi report and store it into sched_ctrl
+    // iterate over received harq bits
+    for (int harq_bit = 0; harq_bit < uci_234->harq.harq_bit_len; harq_bit++) {
+      const int acknack = ((uci_234->harq.harq_payload[harq_bit >> 3]) >> harq_bit) & 0x01;
+      const int feedback_slot = (slot - 1 + num_slots) % num_slots;
+      /* In case of realtime problems: we can only identify a HARQ process by
+       * timing. If the HARQ process's feedback_slot is not the one we
+       * expected, we assume that processing has been aborted and we need to
+       * skip this HARQ process, which is what happens in the loop below. If
+       * you don't experience real-time problems, you might simply revert the
+       * commit that introduced these changes. */
+      int8_t pid = sched_ctrl->feedback_dl_harq.head;
+      DevAssert(pid >= 0);
+      while (sched_ctrl->harq_processes[pid].feedback_slot != feedback_slot) {
+        LOG_W(MAC,
+              "expected feedback slot %d, but found %d instead\n",
+              sched_ctrl->harq_processes[pid].feedback_slot,
+              feedback_slot);
+        remove_front_nr_list(&sched_ctrl->feedback_dl_harq);
+        handle_dl_harq(mod_id, UE_id, pid, 0);
+        pid = sched_ctrl->feedback_dl_harq.head;
+        DevAssert(pid >= 0);
+      }
+      remove_front_nr_list(&sched_ctrl->feedback_dl_harq);
+      NR_UE_harq_t *harq = &sched_ctrl->harq_processes[pid];
+      DevAssert(harq->is_waiting);
+      handle_dl_harq(mod_id, UE_id, pid, uci_234->harq.harq_crc != 1 && acknack);
+    }
+    //API to parse the csi report and store it into sched_ctrl
     extract_pucch_csi_report (csi_MeasConfig, uci_234, frame, slot, UE_id, mod_id);
     //TCI handling function
     tci_handling(mod_id, UE_id,frame, slot);
   }
 
   if (uci_234 -> pduBitmap & 0x08) {
-          ///Handle CSI Report 2
+    //@TODO:Handle CSI Report 2
   }
 }
 
 
 // function to update pucch scheduling parameters in UE list when a USS DL is scheduled
-void nr_acknack_scheduling(int Mod_idP,
+bool nr_acknack_scheduling(int mod_id,
                            int UE_id,
-                           frame_t frameP,
-                           sub_frame_t slotP,
-                           int slots_per_tdd,
-                           int *pucch_id,
-                           int *pucch_occ) {
-
-  NR_ServingCellConfigCommon_t *scc = RC.nrmac[Mod_idP]->common_channels->ServingCellConfigCommon;
-  NR_UE_info_t *UE_info = &RC.nrmac[Mod_idP]->UE_info;
-  NR_sched_pucch *curr_pucch;
-  int max_acknacks,pucch_res,first_ul_slot_tdd,k,i,l;
-  uint8_t pdsch_to_harq_feedback[8];
-  int found = 0;
-  int nr_ulmix_slots = scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofUplinkSlots;
-  if (scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofUplinkSymbols!=0)
-    nr_ulmix_slots++;
-
-  bool csi_pres=false;
-  for (k=0; k<nr_ulmix_slots; k++) {
-    if(UE_info->UE_sched_ctrl[UE_id].sched_pucch[k][0].csi_bits>0)
-      csi_pres=true;
+                           frame_t frame,
+                           sub_frame_t slot)
+{
+  const NR_ServingCellConfigCommon_t *scc = RC.nrmac[mod_id]->common_channels->ServingCellConfigCommon;
+  const int n_slots_frame = nr_slots_per_frame[*scc->ssbSubcarrierSpacing];
+  const NR_TDD_UL_DL_Pattern_t *tdd = &scc->tdd_UL_DL_ConfigurationCommon->pattern1;
+  const int nr_ulmix_slots = tdd->nrofUplinkSlots + (tdd->nrofUplinkSymbols != 0);
+  const int nr_mix_slots = tdd->nrofDownlinkSymbols != 0 || tdd->nrofUplinkSymbols != 0;
+  const int nr_slots_period = tdd->nrofDownlinkSlots + tdd->nrofUplinkSlots + nr_mix_slots;
+  const int first_ul_slot_tdd = tdd->nrofDownlinkSlots + nr_slots_period * (slot / nr_slots_period);
+  const int CC_id = 0;
+
+  AssertFatal(slot < first_ul_slot_tdd + (tdd->nrofUplinkSymbols != 0),
+              "cannot handle multiple TDD periods (yet): slot %d first_ul_slot_tdd %d nrofUplinkSlots %ld\n",
+              slot,
+              first_ul_slot_tdd,
+              tdd->nrofUplinkSlots);
+
+  /* for the moment, we consider:
+   * * only pucch_sched[0] holds HARQ (and SR)
+   * * we do not multiplex with CSI, which is always in pucch_sched[2]
+   * * SR uses format 0 and is allocated in the first UL (mixed) slot (and not
+   *   later)
+   * * that the PUCCH resource set 0 (for up to 2 bits) points to the first N
+   *   PUCCH resources, where N is the number of resources in the PUCCH
+   *   resource set. This is used in pucch_index_used, which counts the used
+   *   resources by index, and not by their ID! */
+  NR_UE_sched_ctrl_t *sched_ctrl = &RC.nrmac[mod_id]->UE_info.UE_sched_ctrl[UE_id];
+  NR_sched_pucch_t *pucch = &sched_ctrl->sched_pucch[0];
+  AssertFatal(pucch->csi_bits == 0,
+              "%s(): csi_bits %d in sched_pucch[0]\n",
+              __func__,
+              pucch->csi_bits);
+
+  const int max_acknacks = 2;
+  AssertFatal(pucch->dai_c + pucch->sr_flag <= max_acknacks,
+              "illegal number of bits in PUCCH of UE %d\n",
+              UE_id);
+  /* if the currently allocated PUCCH of this UE is full, allocate it */
+  if (pucch->sr_flag + pucch->dai_c == max_acknacks) {
+    /* advance the UL slot information in PUCCH by one so we won't schedule in
+     * the same slot again */
+    const int f = pucch->frame;
+    const int s = pucch->ul_slot;
+    nr_fill_nfapi_pucch(mod_id, frame, slot, pucch, UE_id);
+    memset(pucch, 0, sizeof(*pucch));
+    pucch->frame = s == n_slots_frame - 1 ? (f + 1) % 1024 : f;
+    pucch->ul_slot = (s + 1) % n_slots_frame;
+    // we assume that only two indices over the array sched_pucch exist
+    const NR_sched_pucch_t *csi_pucch = &sched_ctrl->sched_pucch[2];
+    // skip the CSI PUCCH if it is present and if in the next frame/slot
+    if (csi_pucch->csi_bits > 0
+        && csi_pucch->frame == pucch->frame
+        && csi_pucch->ul_slot == pucch->ul_slot) {
+      AssertFatal(!csi_pucch->simultaneous_harqcsi,
+                  "%s(): %d.%d cannot handle simultaneous_harqcsi, but found for UE %d\n",
+                  __func__,
+                  pucch->frame,
+                  pucch->ul_slot,
+                  UE_id);
+      nr_fill_nfapi_pucch(mod_id, frame, slot, csi_pucch, UE_id);
+      pucch->frame = s >= n_slots_frame - 2 ?  (f + 1) % 1024 : f;
+      pucch->ul_slot = (s + 2) % n_slots_frame;
+    }
   }
 
-  // As a preference always schedule ack nacks in PUCCH0 (max 2 per slots)
-  // Unless there is CSI meas reporting scheduled in the period to avoid conflicts in the same slot
-  if (csi_pres)
-    max_acknacks=10;
-  else
-    max_acknacks=2;
+  /* if the UE's next PUCCH occasion is after the possible UL slots (within the
+   * same frame) or wrapped around to the next frame, then we assume there is
+   * no possible PUCCH allocation anymore */
+  if ((pucch->frame == frame
+       && (pucch->ul_slot >= first_ul_slot_tdd + nr_ulmix_slots))
+      || (pucch->frame == frame + 1))
+    return false;
 
   // this is hardcoded for now as ue specific
   NR_SearchSpace__searchSpaceType_PR ss_type = NR_SearchSpace__searchSpaceType_PR_ue_Specific;
-  get_pdsch_to_harq_feedback(Mod_idP,UE_id,ss_type,pdsch_to_harq_feedback);
-
-  // for each possible ul or mixed slot
-  for (k=0; k<nr_ulmix_slots; k++) {
-    for (l=0; l<1; l++) { // scheduling 2 PUCCH in a single slot does not work with the phone, currently
-      curr_pucch = &UE_info->UE_sched_ctrl[UE_id].sched_pucch[k][l];
-      //if it is possible to schedule acknack in current pucch (no exclusive csi pucch)
-      if ((curr_pucch->csi_bits == 0) || (curr_pucch->simultaneous_harqcsi==true)) {
-        // if there is free room in current pucch structure
-        if (curr_pucch->dai_c<max_acknacks) {
-          pucch_res = get_pucch_resource(UE_info,UE_id,k,l);
-          if (pucch_res>-1){
-            curr_pucch->resource_indicator = pucch_res;
-            curr_pucch->frame = frameP;
-            // first pucch occasion in first UL or MIXED slot
-            first_ul_slot_tdd = scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofDownlinkSlots;
-            i = 0;
-            while (i<8 && found == 0)  {  // look if timing indicator is among allowed values
-              if (pdsch_to_harq_feedback[i]==(first_ul_slot_tdd+k)-(slotP % slots_per_tdd))
-                found = 1;
-              if (found == 0) i++;
-            }
-            if (found == 1) {
-              // computing slot in which pucch is scheduled
-              curr_pucch->dai_c++;
-              curr_pucch->ul_slot = first_ul_slot_tdd + k + (slotP - (slotP % slots_per_tdd));
-              curr_pucch->timing_indicator = i; // index in the list of timing indicators
-              *pucch_id = k;
-              *pucch_occ = l;
-              return;
-            }
-          }
-        }
-      }
+  uint8_t pdsch_to_harq_feedback[8];
+  get_pdsch_to_harq_feedback(mod_id, UE_id, ss_type, pdsch_to_harq_feedback);
+
+  /* there is a scheduled SR or HARQ. Check whether we can use it for this
+   * ACKNACK */
+  if (pucch->sr_flag + pucch->dai_c > 0) {
+    /* this UE already has a PUCCH occasion */
+    DevAssert(pucch->frame == frame);
+
+    // Find the right timing_indicator value.
+    int i = 0;
+    while (i < 8) {
+      if (pdsch_to_harq_feedback[i] == pucch->ul_slot - slot)
+        break;
+      ++i;
+    }
+    if (i >= 8) {
+      // we cannot reach this timing anymore, allocate and try again
+      const int f = pucch->frame;
+      const int s = pucch->ul_slot;
+      const int n_slots_frame = nr_slots_per_frame[*scc->ssbSubcarrierSpacing];
+      nr_fill_nfapi_pucch(mod_id, frame, slot, pucch, UE_id);
+      memset(pucch, 0, sizeof(*pucch));
+      pucch->frame = s == n_slots_frame - 1 ? (f + 1) % 1024 : f;
+      pucch->ul_slot = (s + 1) % n_slots_frame;
+      return nr_acknack_scheduling(mod_id, UE_id, frame, slot);
+    }
+
+    pucch->timing_indicator = i;
+    pucch->dai_c++;
+    // retain old resource indicator, and we are good
+    return true;
+  }
+
+  /* we need to find a new PUCCH occasion */
+
+  NR_PUCCH_Config_t *pucch_Config = sched_ctrl->active_ubwp->bwp_Dedicated->pucch_Config->choice.setup;
+  DevAssert(pucch_Config->resourceToAddModList->list.count > 0);
+  DevAssert(pucch_Config->resourceSetToAddModList->list.count > 0);
+  const int n_res = pucch_Config->resourceSetToAddModList->list.array[0]->resourceList.list.count;
+  int *pucch_index_used = RC.nrmac[mod_id]->pucch_index_used[sched_ctrl->active_ubwp->bwp_Id];
+
+  /* if time information is outdated (e.g., last PUCCH occasion in last frame),
+   * set to first possible UL occasion in this frame. Note that if such UE is
+   * scheduled a lot and used all AckNacks, pucch->frame might have been
+   * wrapped around to next frame */
+  if (frame != pucch->frame || pucch->ul_slot < first_ul_slot_tdd) {
+    DevAssert(pucch->sr_flag + pucch->dai_c == 0);
+    AssertFatal(frame + 1 != pucch->frame,
+                "frame wrap around not handled in %s() yet\n",
+                __func__);
+    pucch->frame = frame;
+    pucch->ul_slot = first_ul_slot_tdd;
+  }
+
+  // increase to first slot in which PUCCH resources are available
+  while (pucch_index_used[pucch->ul_slot] >= n_res) {
+    pucch->ul_slot++;
+    /* if there is no free resource anymore, abort search */
+    if ((pucch->frame == frame
+         && pucch->ul_slot >= first_ul_slot_tdd + nr_ulmix_slots)
+        || (pucch->frame == frame + 1)) {
+      LOG_E(MAC,
+            "%4d.%2d no free PUCCH resources anymore while searching for UE %d\n",
+            frame,
+            slot,
+            UE_id);
+      return false;
     }
   }
-  AssertFatal(1==0,"No Uplink slot available in accordance to allowed timing indicator\n");
+
+  // advance ul_slot if it is not reachable by UE
+  pucch->ul_slot = max(pucch->ul_slot, slot + pdsch_to_harq_feedback[0]);
+
+  // Find the right timing_indicator value.
+  int i = 0;
+  while (i < 8) {
+    if (pdsch_to_harq_feedback[i] == pucch->ul_slot - slot)
+      break;
+    ++i;
+  }
+  if (i >= 8) {
+    LOG_W(MAC,
+          "%4d.%2d could not find pdsch_to_harq_feedback for UE %d: earliest "
+          "ack slot %d\n",
+          frame,
+          slot,
+          UE_id,
+          pucch->ul_slot);
+    return false;
+  }
+  pucch->timing_indicator = i; // index in the list of timing indicators
+
+  pucch->dai_c++;
+  const int pucch_res = pucch_index_used[pucch->ul_slot];
+  pucch->resource_indicator = pucch_res;
+  pucch_index_used[pucch->ul_slot] += 1;
+  AssertFatal(pucch_index_used[pucch->ul_slot] <= n_res,
+              "UE %d in %4d.%2d: pucch_index_used is %d (%d available)\n",
+              UE_id,
+              pucch->frame,
+              pucch->ul_slot,
+              pucch_index_used[pucch->ul_slot],
+              n_res);
+
+  /* verify that at that slot and symbol, resources are free. We only do this
+   * for initialCyclicShift 0 (we assume it always has that one), so other
+   * initialCyclicShifts can overlap with ICS 0!*/
+  const NR_PUCCH_Resource_t *resource =
+      pucch_Config->resourceToAddModList->list.array[pucch_res];
+  DevAssert(resource->format.present == NR_PUCCH_Resource__format_PR_format0);
+  if (resource->format.choice.format0->initialCyclicShift == 0) {
+    uint16_t *vrb_map_UL = &RC.nrmac[mod_id]->common_channels[CC_id].vrb_map_UL[pucch->ul_slot * MAX_BWP_SIZE];
+    const uint16_t symb = 1 << resource->format.choice.format0->startingSymbolIndex;
+    AssertFatal((vrb_map_UL[resource->startingPRB] & symb) == 0,
+                "symbol %x is not free for PUCCH alloc in vrb_map_UL at RB %ld and slot %d\n",
+                symb, resource->startingPRB, pucch->ul_slot);
+    vrb_map_UL[resource->startingPRB] |= symb;
+  }
+  return true;
 }
 
 
-void csi_period_offset(NR_CSI_ReportConfig_t *csirep,
+void csi_period_offset(const NR_CSI_ReportConfig_t *csirep,
                        int *period, int *offset) {
 
     NR_CSI_ReportPeriodicityAndOffset_PR p_and_o = csirep->reportConfigType.choice.periodic->reportSlotConfig.present;
@@ -1221,24 +1313,6 @@ void csi_period_offset(NR_CSI_ReportConfig_t *csirep,
     }
 }
 
-
-int get_pucch_resource(NR_UE_info_t *UE_info,int UE_id,int k,int l) {
-
-  // to be updated later, for now simple implementation
-  // use the second allocation just in case there is csi in the first
-  // in that case use second resource (for a different symbol) see 9.2 in 38.213
-  if (l==1) {
-    if (UE_info->UE_sched_ctrl[UE_id].sched_pucch[k][0].csi_bits==0)
-      return -1;
-    else
-      return 1;
-  }
-  else
-    return 0;
-
-}
-
-
 uint16_t compute_pucch_prb_size(uint8_t format,
                                 uint8_t nr_prbs,
                                 uint16_t O_tot,
@@ -1314,8 +1388,3 @@ uint16_t compute_pucch_prb_size(uint8_t format,
     AssertFatal(1==0,"Not yet implemented");
   }
 }
-
-
-
-
-

openair2/RRC/NR/rrc_gNB_reconfig.c

@@ -1053,7 +1053,8 @@ void fill_default_secondaryCellGroup(NR_ServingCellConfigCommon_t *servingcellco
  secondaryCellGroup->spCellConfig->spCellConfigDedicated->pdsch_ServingCellConfig->choice.setup = pdsch_servingcellconfig;
  pdsch_servingcellconfig->codeBlockGroupTransmission = NULL;
  pdsch_servingcellconfig->xOverhead = NULL;
- pdsch_servingcellconfig->nrofHARQ_ProcessesForPDSCH = NULL;
+ pdsch_servingcellconfig->nrofHARQ_ProcessesForPDSCH = calloc(1, sizeof(*pdsch_servingcellconfig->nrofHARQ_ProcessesForPDSCH));
+ *pdsch_servingcellconfig->nrofHARQ_ProcessesForPDSCH = NR_PDSCH_ServingCellConfig__nrofHARQ_ProcessesForPDSCH_n16;
  pdsch_servingcellconfig->pucch_Cell= NULL;
  pdsch_servingcellconfig->ext1=calloc(1,sizeof(*pdsch_servingcellconfig->ext1));
  pdsch_servingcellconfig->ext1->maxMIMO_Layers = calloc(1,sizeof(*pdsch_servingcellconfig->ext1->maxMIMO_Layers));
@@ -1287,4 +1288,3 @@ void rrc_config_dl_ptrs_params(NR_BWP_Downlink_t *bwp, int *ptrsNrb, int *ptrsMc
   *bwp->bwp_Dedicated->pdsch_Config->choice.setup->dmrs_DownlinkForPDSCH_MappingTypeA->choice.setup->phaseTrackingRS->choice.setup->resourceElementOffset = *reOffset;
 }
 #endif
-