diff --git a/executables/nr-ue.c b/executables/nr-ue.c
index 36a798cfff..e889bd27ab 100644
--- a/executables/nr-ue.c
+++ b/executables/nr-ue.c
@@ -981,18 +981,18 @@ void *UE_thread(void *arg)
 
 void init_NR_UE(int nb_inst, char *uecap_file, char *reconfig_file, char *rbconfig_file)
 {
-  NR_UE_MAC_INST_t *mac_inst;
-  NR_UE_RRC_INST_t* rrc_inst;
-  
-  for (int inst = 0; inst < nb_inst; inst++) {
-    AssertFatal((rrc_inst = nr_l3_init_ue(uecap_file)) != NULL, "can not initialize RRC module\n");
-    AssertFatal((mac_inst = nr_l2_init_ue()) != NULL, "can not initialize L2 module\n");
-    AssertFatal((mac_inst->if_module = nr_ue_if_module_init(inst)) != NULL, "can not initialize IF module\n");
+  NR_UE_RRC_INST_t *rrc_inst = nr_rrc_init_ue(uecap_file, nb_inst);
+  NR_UE_MAC_INST_t *mac_inst = nr_l2_init_ue(nb_inst);
+  AssertFatal(mac_inst, "Couldn't allocate MAC module\n");
+
+  for (int i = 0; i < nb_inst; i++) {
+    NR_UE_MAC_INST_t *mac = get_mac_inst(i);
+    AssertFatal((mac->if_module = nr_ue_if_module_init(i)) != NULL, "can not initialize IF module\n");
     if (!get_softmodem_params()->sa) {
-      init_nsa_message(rrc_inst, reconfig_file, rbconfig_file);
+      init_nsa_message(&rrc_inst[i], reconfig_file, rbconfig_file);
       // TODO why do we need noS1 configuration?
       // temporarily moved here to understand why not using the one provided by gNB
-      nr_rlc_activate_srb0(mac_inst->crnti, NULL, send_srb0_rrc);
+      nr_rlc_activate_srb0(mac->crnti, NULL, send_srb0_rrc);
       if (IS_SOFTMODEM_NOS1) {
         // get default noS1 configuration
         NR_RadioBearerConfig_t *rbconfig = NULL;
@@ -1001,8 +1001,8 @@ void init_NR_UE(int nb_inst, char *uecap_file, char *reconfig_file, char *rbconf
 
         // set up PDCP, RLC, MAC
         nr_pdcp_layer_init(false);
-        nr_pdcp_add_drbs(ENB_FLAG_NO, inst, rbconfig->drb_ToAddModList, 0, NULL, NULL);
-        nr_rlc_add_drb(mac_inst->crnti, rbconfig->drb_ToAddModList->list.array[0]->drb_Identity, rlc_rbconfig);
+        nr_pdcp_add_drbs(ENB_FLAG_NO, i, rbconfig->drb_ToAddModList, 0, NULL, NULL);
+        nr_rlc_add_drb(mac->crnti, rbconfig->drb_ToAddModList->list.array[0]->drb_Identity, rlc_rbconfig);
         struct NR_CellGroupConfig__rlc_BearerToAddModList rlc_toadd_list;
         rlc_toadd_list.list.count = 1;
         rlc_toadd_list.list.array = calloc(1, sizeof(NR_RLC_BearerConfig_t));
diff --git a/executables/nr-uesoftmodem.c b/executables/nr-uesoftmodem.c
index 62f5e4b772..6fe411c253 100644
--- a/executables/nr-uesoftmodem.c
+++ b/executables/nr-uesoftmodem.c
@@ -454,7 +454,8 @@ configmodule_interface_t *uniqCfg = NULL;
 // A global var to reduce the changes size
 ldpc_interface_t ldpc_interface = {0}, ldpc_interface_offload = {0};
 
-int main( int argc, char **argv ) {
+int main(int argc, char **argv)
+{
   int set_exe_prio = 1;
   if (checkIfFedoraDistribution())
     if (checkIfGenericKernelOnFedora())
@@ -509,7 +510,7 @@ int main( int argc, char **argv ) {
     memset(PHY_vars_UE_g[0][CC_id], 0, sizeof(*PHY_vars_UE_g[0][CC_id]));
   }
 
-  init_NR_UE(1, uecap_file, reconfig_file, rbconfig_file);
+  init_NR_UE(NB_UE_INST, uecap_file, reconfig_file, rbconfig_file);
 
   int mode_offset = get_softmodem_params()->nsa ? NUMBER_OF_UE_MAX : 1;
   uint16_t node_number = get_softmodem_params()->node_number;
diff --git a/openair1/SIMULATION/NR_PHY/dlsim.c b/openair1/SIMULATION/NR_PHY/dlsim.c
index 30e84a8837..4572b5f75c 100644
--- a/openair1/SIMULATION/NR_PHY/dlsim.c
+++ b/openair1/SIMULATION/NR_PHY/dlsim.c
@@ -849,7 +849,7 @@ int main(int argc, char **argv)
     nr_gold_pdsch(UE, i, UE->scramblingID_dlsch[i]);
   }
 
-  nr_l2_init_ue();
+  nr_l2_init_ue(1);
   UE_mac = get_mac_inst(0);
   ue_init_config_request(UE_mac, mu);
 
diff --git a/openair1/SIMULATION/NR_PHY/ulsim.c b/openair1/SIMULATION/NR_PHY/ulsim.c
index 684a8385d1..9b227f3b7a 100644
--- a/openair1/SIMULATION/NR_PHY/ulsim.c
+++ b/openair1/SIMULATION/NR_PHY/ulsim.c
@@ -690,8 +690,7 @@ int main(int argc, char *argv[])
   }
 
   //Configure UE
-  nr_l2_init_ue();
-
+  nr_l2_init_ue(1);
   NR_UE_MAC_INST_t* UE_mac = get_mac_inst(0);
 
   ue_init_config_request(UE_mac, mu);
diff --git a/openair2/LAYER2/NR_MAC_UE/mac_defs.h b/openair2/LAYER2/NR_MAC_UE/mac_defs.h
index 43125659a9..378411abca 100644
--- a/openair2/LAYER2/NR_MAC_UE/mac_defs.h
+++ b/openair2/LAYER2/NR_MAC_UE/mac_defs.h
@@ -68,7 +68,6 @@
 // NR UE defs
 // ==========
 
-#define NB_NR_UE_MAC_INST 1
 #define MAX_NUM_BWP_UE 5
 #define NUM_SLOT_FRAME 10
 
@@ -452,6 +451,7 @@ typedef struct {
 
 /*!\brief Top level UE MAC structure */
 typedef struct {
+  module_id_t ue_id;
   NR_UE_L2_STATE_t state;
   int servCellIndex;
   long physCellId;
diff --git a/openair2/LAYER2/NR_MAC_UE/mac_proto.h b/openair2/LAYER2/NR_MAC_UE/mac_proto.h
index 9d955580b2..4145b49f49 100644
--- a/openair2/LAYER2/NR_MAC_UE/mac_proto.h
+++ b/openair2/LAYER2/NR_MAC_UE/mac_proto.h
@@ -197,10 +197,10 @@ void nr_rrc_mac_config_req_sib1(module_id_t module_id,
 
 void nr_rrc_mac_config_req_reset(module_id_t module_id, NR_UE_MAC_reset_cause_t cause);
 
-/**\brief initialization NR UE MAC instance(s), total number of MAC instance based on NB_NR_UE_MAC_INST*/
-NR_UE_MAC_INST_t * nr_l2_init_ue();
+/**\brief initialization NR UE MAC instance(s)*/
+NR_UE_MAC_INST_t * nr_l2_init_ue(int nb_inst);
 
-/**\brief fetch MAC instance by module_id, within 0 - (NB_NR_UE_MAC_INST-1)
+/**\brief fetch MAC instance by module_id
    \param module_id index of MAC instance(s)*/
 NR_UE_MAC_INST_t *get_mac_inst(module_id_t module_id);
 
diff --git a/openair2/LAYER2/NR_MAC_UE/main_ue_nr.c b/openair2/LAYER2/NR_MAC_UE/main_ue_nr.c
index 83b5d7867b..31b395a439 100644
--- a/openair2/LAYER2/NR_MAC_UE/main_ue_nr.c
+++ b/openair2/LAYER2/NR_MAC_UE/main_ue_nr.c
@@ -112,26 +112,32 @@ void nr_ue_mac_default_configs(NR_UE_MAC_INST_t *mac)
   }
 }
 
-NR_UE_MAC_INST_t *nr_l2_init_ue()
+NR_UE_MAC_INST_t *nr_l2_init_ue(int nb_inst)
 {
   //init mac here
-  nr_ue_mac_inst = (NR_UE_MAC_INST_t *)calloc(NB_NR_UE_MAC_INST, sizeof(NR_UE_MAC_INST_t));
+  nr_ue_mac_inst = (NR_UE_MAC_INST_t *)calloc(nb_inst, sizeof(NR_UE_MAC_INST_t));
+  AssertFatal(nr_ue_mac_inst, "Couldn't allocate %d instances of MAC module\n", nb_inst);
 
-  for (int j = 0; j < NB_NR_UE_MAC_INST; j++) {
+  for (int j = 0; j < nb_inst; j++) {
     nr_ue_init_mac(j);
     NR_UE_MAC_INST_t *mac = get_mac_inst(j);
+    mac->ue_id = j;
     nr_ue_mac_default_configs(mac);
     if (get_softmodem_params()->sa)
       ue_init_config_request(mac, get_softmodem_params()->numerology);
   }
+
   int rc = rlc_module_init(0);
-  AssertFatal(rc == 0, "%s: Could not initialize RLC layer\n", __FUNCTION__);
+  AssertFatal(rc == 0, "Could not initialize RLC layer\n");
 
   return (nr_ue_mac_inst);
 }
 
-NR_UE_MAC_INST_t *get_mac_inst(module_id_t module_id) {
-  return &nr_ue_mac_inst[(int)module_id];
+NR_UE_MAC_INST_t *get_mac_inst(module_id_t module_id)
+{
+  NR_UE_MAC_INST_t *mac = &nr_ue_mac_inst[(int)module_id];
+  AssertFatal(mac, "Couldn't get MAC inst %d\n", module_id);
+  return mac;
 }
 
 void reset_mac_inst(NR_UE_MAC_INST_t *nr_mac)
diff --git a/openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c b/openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
index be2c785b7b..640caf5dad 100644
--- a/openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
+++ b/openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
@@ -2409,7 +2409,6 @@ bool trigger_periodic_scheduling_request(NR_UE_MAC_INST_t *mac, PUCCH_sched_t *p
 int8_t nr_ue_get_SR(module_id_t module_idP, frame_t frameP, slot_t slot)
 {
   // no UL-SCH resources available for this tti && UE has a valid PUCCH resources for SR configuration for this tti
-  DevCheck(module_idP < NB_NR_UE_MAC_INST, module_idP, NB_NR_UE_MAC_INST, 0);
   NR_UE_MAC_INST_t *mac = get_mac_inst(module_idP);
   NR_UE_SCHEDULING_INFO *si = &mac->scheduling_info;
   int max_sr_transmissions = (1 << (2 + si->sr_TransMax));
diff --git a/openair2/LAYER2/nr_rlc/nr_rlc_oai_api.c b/openair2/LAYER2/nr_rlc/nr_rlc_oai_api.c
index 7c7ee584a2..f678b2a0ca 100644
--- a/openair2/LAYER2/nr_rlc/nr_rlc_oai_api.c
+++ b/openair2/LAYER2/nr_rlc/nr_rlc_oai_api.c
@@ -308,9 +308,8 @@ rlc_op_status_t rlc_data_req(const protocol_ctxt_t *const ctxt_pP,
   nr_rlc_ue_t *ue;
   nr_rlc_entity_t *rb;
 
-  LOG_D(RLC, "%s rnti %d srb_flag %d rb_id %ld mui %d confirm %d sdu_size %d MBMS_flag %d\n",
-        __FUNCTION__, rnti, srb_flagP, rb_idP, muiP, confirmP, sdu_sizeP,
-        MBMS_flagP);
+  LOG_D(RLC, "rnti %d srb_flag %d rb_id %ld mui %d confirm %d sdu_size %d MBMS_flag %d\n",
+        rnti, srb_flagP, rb_idP, muiP, confirmP, sdu_sizeP, MBMS_flagP);
 
   if (ctxt_pP->enb_flag)
     T(T_ENB_RLC_DL, T_INT(ctxt_pP->module_id), T_INT(ctxt_pP->rntiMaybeUEid), T_INT(rb_idP), T_INT(sdu_sizeP));
diff --git a/openair2/RRC/NR_UE/main_ue.c b/openair2/RRC/NR_UE/main_ue.c
index b558744e9e..0e51fe2779 100644
--- a/openair2/RRC/NR_UE/main_ue.c
+++ b/openair2/RRC/NR_UE/main_ue.c
@@ -35,11 +35,6 @@
 #include "common/utils/LOG/log.h"
 #include "executables/softmodem-common.h"
 
-NR_UE_RRC_INST_t* nr_l3_init_ue(char* uecap)
-{
-  return openair_rrc_top_init_ue_nr(uecap);
-}
-
 void init_nsa_message(NR_UE_RRC_INST_t *rrc, char* reconfig_file, char* rbconfig_file)
 {
   if (get_softmodem_params()->phy_test == 1 || get_softmodem_params()->do_ra == 1) {
diff --git a/openair2/RRC/NR_UE/rrc_UE.c b/openair2/RRC/NR_UE/rrc_UE.c
index 1b33e60fdf..da338ebd4c 100644
--- a/openair2/RRC/NR_UE/rrc_UE.c
+++ b/openair2/RRC/NR_UE/rrc_UE.c
@@ -299,40 +299,37 @@ void process_nsa_message(NR_UE_RRC_INST_t *rrc, nsa_message_t nsa_message_type,
   }
 }
 
-NR_UE_RRC_INST_t* openair_rrc_top_init_ue_nr(char* uecap_file)
+NR_UE_RRC_INST_t* nr_rrc_init_ue(char* uecap_file, int nb_inst)
 {
-  if(NB_NR_UE_INST > 0) {
-    NR_UE_rrc_inst = (NR_UE_RRC_INST_t *)calloc(NB_NR_UE_INST , sizeof(NR_UE_RRC_INST_t));
-    for(int nr_ue = 0; nr_ue < NB_NR_UE_INST; nr_ue++) {
-      NR_UE_RRC_INST_t *rrc = &NR_UE_rrc_inst[nr_ue];
-      rrc->ue_id = nr_ue;
-      // fill UE-NR-Capability @ UE-CapabilityRAT-Container here.
-      rrc->selected_plmn_identity = 1;
+  NR_UE_rrc_inst = (NR_UE_RRC_INST_t *)calloc(nb_inst, sizeof(NR_UE_RRC_INST_t));
+  AssertFatal(NR_UE_rrc_inst, "Couldn't allocate %d instances of RRC module\n", nb_inst);
 
-      rrc->dl_bwp_id = 0;
-      rrc->ul_bwp_id = 0;
-      rrc->as_security_activated = false;
+  for(int nr_ue = 0; nr_ue < nb_inst; nr_ue++) {
+    NR_UE_RRC_INST_t *rrc = &NR_UE_rrc_inst[nr_ue];
+    rrc->ue_id = nr_ue;
+    // fill UE-NR-Capability @ UE-CapabilityRAT-Container here.
+    rrc->selected_plmn_identity = 1;
 
-      for (int i = 0; i < NB_CNX_UE; i++) {
-        rrcPerNB_t *ptr = &rrc->perNB[i];
-        ptr->SInfo = (NR_UE_RRC_SI_INFO){0};
-        for (int j = 0; j < NR_NUM_SRB; j++)
-          ptr->Srb[j] = RB_NOT_PRESENT;
-        for (int j = 0; j < MAX_DRBS_PER_UE; j++)
-          ptr->status_DRBs[j] = RB_NOT_PRESENT;
-        // SRB0 activated by default
-        ptr->Srb[0] = RB_ESTABLISHED;
-      }
-    }
+    rrc->dl_bwp_id = 0;
+    rrc->ul_bwp_id = 0;
+    rrc->as_security_activated = false;
 
-    NR_UE_rrc_inst->uecap_file = uecap_file;
+    rrc->uecap_file = uecap_file;
 
-    if (get_softmodem_params()->sl_mode) {
-      configure_NR_SL_Preconfig(get_softmodem_params()->sync_ref);
+    for (int i = 0; i < NB_CNX_UE; i++) {
+      rrcPerNB_t *ptr = &rrc->perNB[i];
+      ptr->SInfo = (NR_UE_RRC_SI_INFO){0};
+      for (int j = 0; j < NR_NUM_SRB; j++)
+        ptr->Srb[j] = RB_NOT_PRESENT;
+      for (int j = 0; j < MAX_DRBS_PER_UE; j++)
+        ptr->status_DRBs[j] = RB_NOT_PRESENT;
+      // SRB0 activated by default
+      ptr->Srb[0] = RB_ESTABLISHED;
     }
   }
-  else{
-    NR_UE_rrc_inst = NULL;
+
+  if (get_softmodem_params()->sl_mode) {
+    configure_NR_SL_Preconfig(get_softmodem_params()->sync_ref);
   }
 
   return NR_UE_rrc_inst;
diff --git a/openair2/RRC/NR_UE/rrc_defs.h b/openair2/RRC/NR_UE/rrc_defs.h
index dacf5dd70d..9f9cb9a289 100644
--- a/openair2/RRC/NR_UE/rrc_defs.h
+++ b/openair2/RRC/NR_UE/rrc_defs.h
@@ -59,7 +59,6 @@
 #include "as_message.h"
 #include "common/utils/nr/nr_common.h"
 
-#define NB_NR_UE_INST 1
 #define NB_CNX_UE 2//MAX_MANAGED_RG_PER_MOBILE
 #define MAX_MEAS_OBJ 7
 #define MAX_MEAS_CONFIG 7
diff --git a/openair2/RRC/NR_UE/rrc_proto.h b/openair2/RRC/NR_UE/rrc_proto.h
index 08db8f6506..ba7c23cdb7 100644
--- a/openair2/RRC/NR_UE/rrc_proto.h
+++ b/openair2/RRC/NR_UE/rrc_proto.h
@@ -52,18 +52,8 @@ extern queue_t nr_dl_tti_req_queue;
 extern queue_t nr_tx_req_queue;
 extern queue_t nr_ul_dci_req_queue;
 extern queue_t nr_ul_tti_req_queue;
-//
-//  main_rrc.c
-//
-/**\brief Layer 3 initialization*/
-NR_UE_RRC_INST_t *nr_l3_init_ue(char *);
 
-//
-//  UE_rrc.c
-//
-
-/**\brief Initial the top level RRC structure instance*/
-NR_UE_RRC_INST_t *openair_rrc_top_init_ue_nr(char *);
+NR_UE_RRC_INST_t *nr_rrc_init_ue(char* uecap_file, int nb_inst);
 void init_nsa_message (NR_UE_RRC_INST_t *rrc, char* reconfig_file, char* rbconfig_file);
 
 void process_nsa_message(NR_UE_RRC_INST_t *rrc, nsa_message_t nsa_message_type, void *message, int msg_len);