diff --git a/openair1/SIMULATION/NR_PHY/dlsim.c b/openair1/SIMULATION/NR_PHY/dlsim.c
index 032983644d..76373a2113 100644
--- a/openair1/SIMULATION/NR_PHY/dlsim.c
+++ b/openair1/SIMULATION/NR_PHY/dlsim.c
@@ -861,6 +861,7 @@ int main(int argc, char **argv)
 
   nr_l2_init_ue(NULL);
   UE_mac = get_mac_inst(0);
+  ue_init_config_request(UE_mac, mu);
 
   UE->if_inst = nr_ue_if_module_init(0);
   UE->if_inst->scheduled_response = nr_ue_scheduled_response;
@@ -888,8 +889,8 @@ int main(int argc, char **argv)
 
   //Configure UE
   NR_BCCH_BCH_Message_t *mib = get_new_MIB_NR(scc);
-  nr_rrc_mac_config_req_mib(0, 0, 0, mib->message.choice.mib, false);
-  nr_rrc_mac_config_req_scg(0, 0, 0, secondaryCellGroup);
+  nr_rrc_mac_config_req_mib(0, 0, mib->message.choice.mib, false);
+  nr_rrc_mac_config_req_scg(0, 0, secondaryCellGroup);
 
   nr_dcireq_t dcireq;
   nr_scheduled_response_t scheduled_response;
diff --git a/openair2/LAYER2/NR_MAC_UE/config_ue.c b/openair2/LAYER2/NR_MAC_UE/config_ue.c
index ebcad5d0de..8bca8819c2 100644
--- a/openair2/LAYER2/NR_MAC_UE/config_ue.c
+++ b/openair2/LAYER2/NR_MAC_UE/config_ue.c
@@ -693,23 +693,17 @@ void configure_current_BWP(NR_UE_MAC_INST_t *mac,
 
 }
 
-void init_config_request(NR_UE_MAC_INST_t *mac)
+void ue_init_config_request(NR_UE_MAC_INST_t *mac, int scs)
 {
-  if(mac->dl_config_request == NULL && mac->ul_config_request == NULL) {
-    int scs = mac->mib->subCarrierSpacingCommon;
-    if(mac->frequency_range == FR2)
-      scs += 2;
-    int slots_per_frame = nr_slots_per_frame[scs];
-    LOG_I(NR_MAC, "Initializing dl and ul config_request. num_slots = %d\n", slots_per_frame);
-    mac->dl_config_request = calloc(slots_per_frame, sizeof(*mac->dl_config_request));
-    mac->ul_config_request = calloc(slots_per_frame, sizeof(*mac->ul_config_request));
-    for (int i = 0; i < slots_per_frame; i++)
-      pthread_mutex_init(&(mac->ul_config_request[i].mutex_ul_config), NULL);
-  }
+  int slots_per_frame = nr_slots_per_frame[scs];
+  LOG_I(NR_MAC, "Initializing dl and ul config_request. num_slots = %d\n", slots_per_frame);
+  mac->dl_config_request = calloc(slots_per_frame, sizeof(*mac->dl_config_request));
+  mac->ul_config_request = calloc(slots_per_frame, sizeof(*mac->ul_config_request));
+  for (int i = 0; i < slots_per_frame; i++)
+    pthread_mutex_init(&(mac->ul_config_request[i].mutex_ul_config), NULL);
 }
 
 void nr_rrc_mac_config_req_mib(module_id_t module_id,
-                               uint8_t gNB_index,
                                int cc_idP,
                                NR_MIB_t *mib,
                                bool sched_sib1)
@@ -718,7 +712,6 @@ void nr_rrc_mac_config_req_mib(module_id_t module_id,
   AssertFatal(mib, "MIB should not be NULL\n");
   // initialize dl and ul config_request upon first reception of MIB
   mac->mib = mib;    //  update by every reception
-  init_config_request(mac);
   mac->phy_config.Mod_id = module_id;
   mac->phy_config.CC_id = cc_idP;
   mac->get_sib1 = sched_sib1;
@@ -726,7 +719,6 @@ void nr_rrc_mac_config_req_mib(module_id_t module_id,
 
 void nr_rrc_mac_config_req_sib1(module_id_t module_id,
                                 int cc_idP,
-                                uint8_t gNB_index,
                                 NR_ServingCellConfigCommonSIB_t *scc)
 {
   NR_UE_MAC_INST_t *mac = get_mac_inst(module_id);
@@ -745,7 +737,6 @@ void nr_rrc_mac_config_req_sib1(module_id_t module_id,
 
 void nr_rrc_mac_config_req_mcg(module_id_t module_id,
                                int cc_idP,
-                               uint8_t gNB_index,
                                NR_CellGroupConfig_t *cell_group_config)
 {
   LOG_I(MAC,"Applying CellGroupConfig from gNodeB\n");
@@ -777,7 +768,7 @@ void nr_rrc_mac_config_req_mcg(module_id_t module_id,
     mac->scc = cell_group_config->spCellConfig->reconfigurationWithSync->spCellConfigCommon;
     mac->nr_band = *mac->scc->downlinkConfigCommon->frequencyInfoDL->frequencyBandList.list.array[0];
     if (mac->scc_SIB) {
-      free(mac->scc_SIB);
+      ASN_STRUCT_FREE(asn_DEF_NR_ServingCellConfigCommonSIB, mac->scc_SIB);
       mac->scc_SIB = NULL;
     }
     mac->state = UE_NOT_SYNC;
@@ -806,7 +797,6 @@ void nr_rrc_mac_config_req_mcg(module_id_t module_id,
 
 void nr_rrc_mac_config_req_scg(module_id_t module_id,
                                int cc_idP,
-                               uint8_t gNB_index,
                                NR_CellGroupConfig_t *scell_group_config)
 {
 
diff --git a/openair2/LAYER2/NR_MAC_UE/mac_proto.h b/openair2/LAYER2/NR_MAC_UE/mac_proto.h
index 3be9eb934d..3c4d552827 100644
--- a/openair2/LAYER2/NR_MAC_UE/mac_proto.h
+++ b/openair2/LAYER2/NR_MAC_UE/mac_proto.h
@@ -93,23 +93,19 @@ int nr_rrc_mac_config_req_ue_logicalChannelBearer(module_id_t module_id,
 
 void nr_rrc_mac_config_req_scg(module_id_t module_id,
                                int cc_idP,
-                               uint8_t gNB_index,
                                NR_CellGroupConfig_t *scell_group_config);
 
 void nr_rrc_mac_config_req_mcg(module_id_t module_id,
                                int cc_idP,
-                               uint8_t gNB_index,
                                NR_CellGroupConfig_t *scell_group_config);
 
 void nr_rrc_mac_config_req_mib(module_id_t module_id,
-                               uint8_t gNB_index,
                                int cc_idP,
                                NR_MIB_t *mibP,
                                bool sched_sib1);
 
 void nr_rrc_mac_config_req_sib1(module_id_t module_id,
                                 int cc_idP,
-                                uint8_t gNB_index,
                                 NR_ServingCellConfigCommonSIB_t *scc);
 
 /**\brief initialization NR UE MAC instance(s), total number of MAC instance based on NB_NR_UE_MAC_INST*/
@@ -425,6 +421,8 @@ void fill_dci_search_candidates(NR_SearchSpace_t *ss,fapi_nr_dl_config_dci_dl_pd
 
 void build_ssb_to_ro_map(NR_UE_MAC_INST_t *mac);
 
+void ue_init_config_request(NR_UE_MAC_INST_t *mac, int scs);
+
 void configure_ss_coreset(NR_UE_MAC_INST_t *mac,
                           NR_ServingCellConfig_t *scd,
                           NR_BWP_Id_t dl_bwp_id);
diff --git a/openair2/LAYER2/NR_MAC_UE/main_ue_nr.c b/openair2/LAYER2/NR_MAC_UE/main_ue_nr.c
index 78d1b4b0f1..8899be18e6 100644
--- a/openair2/LAYER2/NR_MAC_UE/main_ue_nr.c
+++ b/openair2/LAYER2/NR_MAC_UE/main_ue_nr.c
@@ -56,9 +56,17 @@ NR_UE_MAC_INST_t * nr_l2_init_ue(NR_UE_RRC_INST_t* rrc_inst) {
     for (int j = 0; j < NB_NR_UE_MAC_INST; j++)
       nr_ue_init_mac(j);
 
+    int scs = get_softmodem_params()->sa ?
+              get_softmodem_params()->numerology :
+              rrc_inst ?
+              *rrc_inst->scell_group_config->spCellConfig->reconfigurationWithSync->spCellConfigCommon->ssbSubcarrierSpacing :
+              - 1;
+    if (scs > -1)
+      ue_init_config_request(nr_ue_mac_inst, scs);
+
     if (rrc_inst && rrc_inst->scell_group_config) {
 
-      nr_rrc_mac_config_req_scg(0, 0, 0, rrc_inst->scell_group_config);
+      nr_rrc_mac_config_req_scg(0, 0, rrc_inst->scell_group_config);
       AssertFatal(rlc_module_init(0) == 0, "%s: Could not initialize RLC layer\n", __FUNCTION__);
       if (IS_SOFTMODEM_NOS1){
         // get default noS1 configuration
diff --git a/openair2/LAYER2/NR_MAC_UE/nr_ue_dci_configuration.c b/openair2/LAYER2/NR_MAC_UE/nr_ue_dci_configuration.c
index 5aa4438af0..6adaecef41 100644
--- a/openair2/LAYER2/NR_MAC_UE/nr_ue_dci_configuration.c
+++ b/openair2/LAYER2/NR_MAC_UE/nr_ue_dci_configuration.c
@@ -220,9 +220,8 @@ void config_dci_pdu(NR_UE_MAC_INST_t *mac, fapi_nr_dl_config_dci_dl_pdu_rel15_t
 
         rel15->rnti = SI_RNTI; // SI-RNTI - 3GPP TS 38.321 Table 7.1-1: RNTI values
 
-        if(mac->frequency_range == FR1)
-          rel15->SubcarrierSpacing = mac->mib->subCarrierSpacingCommon;
-        else
+        rel15->SubcarrierSpacing = mac->mib->subCarrierSpacingCommon;
+        if(mac->frequency_range == FR2)
           rel15->SubcarrierSpacing = mac->mib->subCarrierSpacingCommon + 2;
         break;
       case NR_RNTI_SFI:
diff --git a/openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c b/openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
index 8b1582a984..9d32171eb0 100644
--- a/openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
+++ b/openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
@@ -676,9 +676,9 @@ int8_t nr_ue_process_dci(module_id_t module_id, int cc_id, uint8_t gNB_index, fr
       NR_Type0_PDCCH_CSS_config_t type0_PDCCH_CSS_config = mac->type0_PDCCH_CSS_config;
       mux_pattern = type0_PDCCH_CSS_config.type0_pdcch_ss_mux_pattern;
       dl_config->dl_config_list[dl_config->number_pdus].pdu_type = FAPI_NR_DL_CONFIG_TYPE_SI_DLSCH;
-      if(mac->frequency_range == FR1)
-        dlsch_config_pdu_1_0->SubcarrierSpacing = mac->mib->subCarrierSpacingCommon;
-      else
+      // in MIB SCS is signaled as 15or60 and 30or120
+      dlsch_config_pdu_1_0->SubcarrierSpacing = mac->mib->subCarrierSpacingCommon;
+      if(mac->frequency_range == FR2)
         dlsch_config_pdu_1_0->SubcarrierSpacing = mac->mib->subCarrierSpacingCommon + 2;
       if (pdsch_config) pdsch_config->dmrs_DownlinkForPDSCH_MappingTypeA->choice.setup->dmrs_AdditionalPosition = NULL; // For PDSCH with mapping type A, the UE shall assume dmrs-AdditionalPosition='pos2'
     } else {
diff --git a/openair2/LAYER2/NR_MAC_UE/nr_ue_scheduler.c b/openair2/LAYER2/NR_MAC_UE/nr_ue_scheduler.c
index 32914b37f9..6545fc945a 100644
--- a/openair2/LAYER2/NR_MAC_UE/nr_ue_scheduler.c
+++ b/openair2/LAYER2/NR_MAC_UE/nr_ue_scheduler.c
@@ -118,12 +118,8 @@ fapi_nr_ul_config_request_t *get_ul_config_request(NR_UE_MAC_INST_t *mac, int sl
   int mu = mac->current_UL_BWP.scs;
   const int n = nr_slots_per_frame[mu];
   AssertFatal(fb_time < n, "Cannot schedule to a slot more than 1 frame away, ul_config_request is not big enough\n");
-  if (mac->ul_config_request)
-    return &mac->ul_config_request[slot];
-  else {
-    LOG_E(NR_MAC, "mac->ul_config_request not set\n");
-    return NULL;
-  }
+  AssertFatal(mac->ul_config_request != NULL, "mac->ul_config_request not initialized, logic bug\n");
+  return &mac->ul_config_request[slot];
 }
 
 /*
@@ -132,12 +128,8 @@ fapi_nr_ul_config_request_t *get_ul_config_request(NR_UE_MAC_INST_t *mac, int sl
  */
 fapi_nr_dl_config_request_t *get_dl_config_request(NR_UE_MAC_INST_t *mac, int slot)
 {
-  if (mac->dl_config_request)
-    return &mac->dl_config_request[slot];
-  else {
-    LOG_E(NR_MAC, "mac->dl_config_request not set\n");
-    return NULL;
-  }
+  AssertFatal(mac->dl_config_request != NULL, "mac->dl_config_request not initialized, logic bug\n");
+  return &mac->dl_config_request[slot];
 }
 
 void ul_layers_config(NR_UE_MAC_INST_t *mac, nfapi_nr_ue_pusch_pdu_t *pusch_config_pdu, dci_pdu_rel15_t *dci, nr_dci_format_t dci_format)
diff --git a/openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.c b/openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.c
index 187976753d..b9876b6773 100644
--- a/openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.c
+++ b/openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.c
@@ -1144,7 +1144,6 @@ int nr_ue_dl_indication(nr_downlink_indication_t *dl_info)
   uint32_t ret_mask = 0x0;
   module_id_t module_id = dl_info->module_id;
   NR_UE_MAC_INST_t *mac = get_mac_inst(module_id);
-  fapi_nr_dl_config_request_t *dl_config = get_dl_config_request(mac, dl_info->slot);
 
   if ((!dl_info->dci_ind && !dl_info->rx_ind)) {
     // UL indication to schedule DCI reception
@@ -1179,6 +1178,7 @@ int nr_ue_dl_indication(nr_downlink_indication_t *dl_info)
         if (ret >= 0) {
           AssertFatal( nr_ue_if_module_inst[module_id] != NULL, "IF module is NULL!\n" );
           AssertFatal( nr_ue_if_module_inst[module_id]->scheduled_response != NULL, "scheduled_response is NULL!\n" );
+          fapi_nr_dl_config_request_t *dl_config = get_dl_config_request(mac, dl_info->slot);
           fill_scheduled_response(&scheduled_response, dl_config, NULL, NULL, dl_info->module_id, dl_info->cc_id, dl_info->frame, dl_info->slot, dl_info->phy_data);
           nr_ue_if_module_inst[module_id]->scheduled_response(&scheduled_response);
         }
diff --git a/openair2/RRC/NR_UE/rrc_UE.c b/openair2/RRC/NR_UE/rrc_UE.c
index 468440a98c..0bffcfdc26 100644
--- a/openair2/RRC/NR_UE/rrc_UE.c
+++ b/openair2/RRC/NR_UE/rrc_UE.c
@@ -286,8 +286,7 @@ int8_t nr_rrc_ue_process_rrcReconfiguration(const module_id_t module_id, NR_RRCR
             nr_rrc_ue_process_scg_config(module_id,cellGroupConfig);
           }
           if (get_softmodem_params()->nsa) {
-            nr_rrc_mac_config_req_scg(0, 0, 0, cellGroupConfig);
-            LOG_D(NR_RRC, "Filled scc now \n");
+            nr_rrc_mac_config_req_scg(0, 0, cellGroupConfig);
           }
         }
         else
@@ -601,8 +600,8 @@ int8_t nr_rrc_ue_decode_NR_BCCH_BCH_Message(const module_id_t module_id, const u
 
     NR_SIB1_t *sib1 = NR_UE_rrc_inst[module_id].sib1[gNB_index];
     // if no sib1 because not acquired yet or expired, get a new one
-    bool get_sib1 = sib1 ? false : true;
-    nr_rrc_mac_config_req_mib(module_id, gNB_index, 0, NR_UE_rrc_inst[module_id].mib, get_sib1);
+    bool get_sib1 = sib1 == NULL;
+    nr_rrc_mac_config_req_mib(module_id, 0, NR_UE_rrc_inst[module_id].mib, get_sib1);
     ret = 0;
   }
   ASN_STRUCT_FREE(asn_DEF_NR_BCCH_BCH_Message, bcch_message);
@@ -1212,7 +1211,7 @@ int8_t nr_rrc_ue_decode_NR_BCCH_DL_SCH_Message(module_id_t module_id,
             }
             // take ServingCellConfigCommon and configure L1/L2
             NR_UE_rrc_inst[module_id].servingCellConfigCommonSIB = sib1->servingCellConfigCommon;
-            nr_rrc_mac_config_req_sib1(module_id, 0, gNB_index, sib1->servingCellConfigCommon);
+            nr_rrc_mac_config_req_sib1(module_id, 0, sib1->servingCellConfigCommon);
             nr_rrc_ue_generate_ra_msg(module_id, gNB_index);
           } else {
             LOG_E(NR_RRC, "SIB1 not decoded\n");
@@ -1341,23 +1340,23 @@ void nr_rrc_ue_process_masterCellGroup(const protocol_ctxt_t *const ctxt_pP,
                      sizeof(struct NR_MAC_CellGroupConfig));
   }
 
-  if( cellGroupConfig->sCellToReleaseList != NULL){
+  if(cellGroupConfig->sCellToReleaseList != NULL) {
     //TODO (perform SCell release as specified in 5.3.5.5.8)
   }
 
-  if( cellGroupConfig->spCellConfig != NULL){
+  if(cellGroupConfig->spCellConfig != NULL) {
     if (NR_UE_rrc_inst[ctxt_pP->module_id].cell_group_config &&
-	      NR_UE_rrc_inst[ctxt_pP->module_id].cell_group_config->spCellConfig) {
+        NR_UE_rrc_inst[ctxt_pP->module_id].cell_group_config->spCellConfig) {
       memcpy(NR_UE_rrc_inst[ctxt_pP->module_id].cell_group_config->spCellConfig,cellGroupConfig->spCellConfig,
              sizeof(struct NR_SpCellConfig));
     } else {
       if (NR_UE_rrc_inst[ctxt_pP->module_id].cell_group_config)
-	      NR_UE_rrc_inst[ctxt_pP->module_id].cell_group_config->spCellConfig = cellGroupConfig->spCellConfig;
+          NR_UE_rrc_inst[ctxt_pP->module_id].cell_group_config->spCellConfig = cellGroupConfig->spCellConfig;
       else
-	      NR_UE_rrc_inst[ctxt_pP->module_id].cell_group_config = cellGroupConfig;
+        NR_UE_rrc_inst[ctxt_pP->module_id].cell_group_config = cellGroupConfig;
     }
     LOG_D(RRC,"Sending CellGroupConfig to MAC\n");
-    nr_rrc_mac_config_req_mcg(ctxt_pP->module_id, 0, 0, cellGroupConfig);
+    nr_rrc_mac_config_req_mcg(ctxt_pP->module_id, 0, cellGroupConfig);
     //TODO (configure the SpCell as specified in 5.3.5.5.7)
   }