From 9dce92eafe1f75b7a08bcf31b79620e640f7c57e Mon Sep 17 00:00:00 2001 From: Xue Song Date: Fri, 11 Dec 2020 14:59:34 +0900 Subject: [PATCH] implement rrcReestablishmentRequest --- common/utils/msc/msc.h | 1 + openair2/RRC/NR/MESSAGES/asn1_msg.c | 38 ++++ openair2/RRC/NR/MESSAGES/asn1_msg.h | 4 +- openair2/RRC/NR/nr_rrc_defs.h | 3 +- openair2/RRC/NR/rrc_gNB.c | 239 +++++++++++++++++++++++++- openair2/RRC/NR_UE/rrc_UE.c | 32 ++++ openair2/SIMULATION/NR_RRC/itti_sim.c | 2 +- 7 files changed, 307 insertions(+), 12 deletions(-) diff --git a/common/utils/msc/msc.h b/common/utils/msc/msc.h index 77ff6fd62f..aab872cfe1 100644 --- a/common/utils/msc/msc.h +++ b/common/utils/msc/msc.h @@ -48,6 +48,7 @@ typedef enum { MSC_MAC_ENB, MSC_RLC_ENB, MSC_PDCP_ENB, + MSC_PDCP_GNB, MSC_RRC_ENB, MSC_RRC_GNB, MSC_IP_ENB, diff --git a/openair2/RRC/NR/MESSAGES/asn1_msg.c b/openair2/RRC/NR/MESSAGES/asn1_msg.c index 88dce1e8cc..6744e154d0 100644 --- a/openair2/RRC/NR/MESSAGES/asn1_msg.c +++ b/openair2/RRC/NR/MESSAGES/asn1_msg.c @@ -69,6 +69,7 @@ #include "NR_RRCReconfigurationComplete.h" #include "NR_RRCReconfigurationComplete-IEs.h" #include "NR_DLInformationTransfer.h" +#include "NR_RRCReestablishmentRequest.h" #if defined(NR_Rel16) #include "NR_SCS-SpecificCarrier.h" #include "NR_TDD-UL-DL-ConfigCommon.h" @@ -1260,3 +1261,40 @@ uint8_t do_NR_ULInformationTransfer(uint8_t **buffer, uint32_t pdu_length, uint8 return encoded; } + +uint8_t do_RRCReestablishmentRequest(uint8_t Mod_id, uint8_t *buffer) { + asn_enc_rval_t enc_rval; + NR_UL_CCCH_Message_t ul_ccch_msg; + NR_RRCReestablishmentRequest_t *rrcReestablishmentRequest; + uint8_t buf[2]; + + memset((void *)&ul_ccch_msg,0,sizeof(NR_UL_CCCH_Message_t)); + ul_ccch_msg.message.present = NR_UL_CCCH_MessageType_PR_c1; + ul_ccch_msg.message.choice.c1 = CALLOC(1, sizeof(struct NR_UL_CCCH_MessageType__c1)); + ul_ccch_msg.message.choice.c1->present = NR_UL_CCCH_MessageType__c1_PR_rrcReestablishmentRequest; + ul_ccch_msg.message.choice.c1->choice.rrcReestablishmentRequest = CALLOC(1, sizeof(NR_RRCReestablishmentRequest_t)); + + rrcReestablishmentRequest = ul_ccch_msg.message.choice.c1->choice.rrcReestablishmentRequest; + // test + rrcReestablishmentRequest->rrcReestablishmentRequest.reestablishmentCause = NR_ReestablishmentCause_reconfigurationFailure; + rrcReestablishmentRequest->rrcReestablishmentRequest.ue_Identity.c_RNTI = 0x1234; + rrcReestablishmentRequest->rrcReestablishmentRequest.ue_Identity.physCellId = 0; + rrcReestablishmentRequest->rrcReestablishmentRequest.ue_Identity.shortMAC_I.buf = buf; + rrcReestablishmentRequest->rrcReestablishmentRequest.ue_Identity.shortMAC_I.buf[0] = 0x08; + rrcReestablishmentRequest->rrcReestablishmentRequest.ue_Identity.shortMAC_I.buf[1] = 0x32; + rrcReestablishmentRequest->rrcReestablishmentRequest.ue_Identity.shortMAC_I.size = 2; + + + if ( LOG_DEBUGFLAG(DEBUG_ASN1) ) { + xer_fprint(stdout, &asn_DEF_NR_UL_CCCH_Message, (void *)&ul_ccch_msg); + } + + enc_rval = uper_encode_to_buffer(&asn_DEF_NR_UL_CCCH_Message, + NULL, + (void *)&ul_ccch_msg, + buffer, + 100); + AssertFatal (enc_rval.encoded > 0, "ASN1 message encoding failed (%s, %lu)!\n", enc_rval.failed_type->name, enc_rval.encoded); + LOG_D(NR_RRC,"[UE] RRCSetupRequest Encoded %zd bits (%zd bytes)\n", enc_rval.encoded, (enc_rval.encoded+7)/8); + return((enc_rval.encoded+7)/8); +} diff --git a/openair2/RRC/NR/MESSAGES/asn1_msg.h b/openair2/RRC/NR/MESSAGES/asn1_msg.h index 25d8d9671f..3affb1858c 100644 --- a/openair2/RRC/NR/MESSAGES/asn1_msg.h +++ b/openair2/RRC/NR/MESSAGES/asn1_msg.h @@ -145,4 +145,6 @@ do_NR_DLInformationTransfer( uint8_t do_NR_ULInformationTransfer(uint8_t **buffer, uint32_t pdu_length, - uint8_t *pdu_buffer); \ No newline at end of file + uint8_t *pdu_buffer); + +uint8_t do_RRCReestablishmentRequest(uint8_t Mod_id, uint8_t *buffer); diff --git a/openair2/RRC/NR/nr_rrc_defs.h b/openair2/RRC/NR/nr_rrc_defs.h index 497d2496ba..7c9763eed4 100644 --- a/openair2/RRC/NR/nr_rrc_defs.h +++ b/openair2/RRC/NR/nr_rrc_defs.h @@ -326,7 +326,7 @@ typedef struct gNB_RRC_UE_s { NR_EstablishmentCause_t establishment_cause; /* Information from UE RRC ConnectionReestablishmentRequest */ - NR_ReestablishmentCause_t reestablishment_cause; + NR_ReestablishmentCause_t reestablishment_cause; /* UE id for initial connection to S1AP */ uint16_t ue_initial_id; @@ -439,6 +439,7 @@ typedef struct { NR_SRB_INFO SI; NR_SRB_INFO Srb0; int initial_csi_index[MAX_NR_RRC_UE_CONTEXTS]; + int physCellId; } rrc_gNB_carrier_data_t; //--------------------------------------------------- diff --git a/openair2/RRC/NR/rrc_gNB.c b/openair2/RRC/NR/rrc_gNB.c index 99a825b722..270b3284da 100644 --- a/openair2/RRC/NR/rrc_gNB.c +++ b/openair2/RRC/NR/rrc_gNB.c @@ -54,6 +54,7 @@ #include "NR_UL-CCCH-Message.h" #include "NR_RRCSetupRequest-IEs.h" #include "NR_RRCSetupComplete-IEs.h" +#include "NR_RRCReestablishmentRequest-IEs.h" #include "rlc.h" #include "rrc_eNB_UE_context.h" @@ -566,6 +567,8 @@ rrc_gNB_generate_defaultRRCReconfiguration( ASN_SEQUENCE_ADD(&DRB_configList->list, DRB_config); ASN_SEQUENCE_ADD(&DRB_configList2->list, DRB_config); + dedicatedNAS_MessageList = CALLOC(1, sizeof(struct NR_RRCReconfiguration_v1530_IEs__dedicatedNAS_MessageList)); + if (ue_context_pP->ue_context.nas_pdu_flag == 1) { dedicatedNAS_Message = CALLOC(1, sizeof(NR_DedicatedNAS_Message_t)); memset(dedicatedNAS_Message, 0, sizeof(OCTET_STRING_t)); @@ -1161,12 +1164,15 @@ int nr_rrc_gNB_decode_ccch(protocol_ctxt_t *const ctxt_pP, int buffer_length, const int CC_id) { - asn_dec_rval_t dec_rval; - NR_UL_CCCH_Message_t *ul_ccch_msg = NULL; - struct rrc_gNB_ue_context_s *ue_context_p = NULL; - gNB_RRC_INST *gnb_rrc_inst = RC.nrrrc[ctxt_pP->module_id]; - NR_RRCSetupRequest_IEs_t *rrcSetupRequest = NULL; - uint64_t random_value = 0; + module_id_t Idx; + asn_dec_rval_t dec_rval; + NR_UL_CCCH_Message_t *ul_ccch_msg = NULL; + struct rrc_gNB_ue_context_s *ue_context_p = NULL; + gNB_RRC_INST *gnb_rrc_inst = RC.nrrrc[ctxt_pP->module_id]; + NR_RRCSetupRequest_IEs_t *rrcSetupRequest = NULL; + NR_RRCReestablishmentRequest_IEs_t rrcReestablishmentRequest; + uint64_t random_value = 0; + int i; dec_rval = uper_decode( NULL, &asn_DEF_NR_UL_CCCH_Message, @@ -1316,9 +1322,224 @@ int nr_rrc_gNB_decode_ccch(protocol_ctxt_t *const ctxt_pP, break; case NR_UL_CCCH_MessageType__c1_PR_rrcReestablishmentRequest: - LOG_I(NR_RRC, "receive rrcReestablishmentRequest message \n"); - /* TODO */ - break; + LOG_I(NR_RRC, "receive rrcReestablishmentRequest message \n"); + LOG_DUMPMSG(NR_RRC, DEBUG_RRC,(char *)(buffer), buffer_length, + "[MSG] RRC Reestablishment Request\n"); + LOG_D(NR_RRC, + PROTOCOL_NR_RRC_CTXT_UE_FMT"MAC_gNB--- MAC_DATA_IND (rrcReestablishmentRequest on SRB0) --> RRC_gNB\n", + PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP)); + + rrcReestablishmentRequest = ul_ccch_msg->message.choice.c1->choice.rrcReestablishmentRequest->rrcReestablishmentRequest; + LOG_I(NR_RRC, + PROTOCOL_NR_RRC_CTXT_UE_FMT" NR_RRCReestablishmentRequest cause %s\n", + PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP), + ((rrcReestablishmentRequest.reestablishmentCause == NR_ReestablishmentCause_otherFailure) ? "Other Failure" : + (rrcReestablishmentRequest.reestablishmentCause == NR_ReestablishmentCause_handoverFailure) ? "Handover Failure" : + "reconfigurationFailure")); + { + uint16_t c_rnti = 0; + if (rrcReestablishmentRequest.ue_Identity.physCellId != RC.nrrrc[ctxt_pP->module_id]->carrier.physCellId) { + /* UE was moving from previous cell so quickly that RRCReestablishment for previous cell was recieved in this cell */ + LOG_E(NR_RRC, + PROTOCOL_NR_RRC_CTXT_UE_FMT" NR_RRCReestablishmentRequest ue_Identity.physCellId(%ld) is not equal to current physCellId(%d), fallback to RRC establishment\n", + PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP), + rrcReestablishmentRequest.ue_Identity.physCellId, + RC.nrrrc[ctxt_pP->module_id]->carrier.physCellId); + rrc_gNB_generate_RRCSetup(ctxt_pP, + rrc_gNB_get_ue_context(gnb_rrc_inst, ctxt_pP->rnti), + CC_id); + break; + } + + LOG_D(NR_RRC, "physCellId is %ld\n", rrcReestablishmentRequest.ue_Identity.physCellId); + + for (i = 0; i < rrcReestablishmentRequest.ue_Identity.shortMAC_I.size; i++) { + LOG_D(NR_RRC, "rrcReestablishmentRequest.ue_Identity.shortMAC_I.buf[%d] = %x\n", + i, rrcReestablishmentRequest.ue_Identity.shortMAC_I.buf[i]); + } + + if (rrcReestablishmentRequest.ue_Identity.c_RNTI < 0 || + rrcReestablishmentRequest.ue_Identity.c_RNTI > 65535) { + /* c_RNTI range error should not happen */ + LOG_E(NR_RRC, + PROTOCOL_NR_RRC_CTXT_UE_FMT" NR_RRCReestablishmentRequest c_RNTI range error, fallback to RRC establishment\n", + PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP)); + rrc_gNB_generate_RRCSetup(ctxt_pP, + rrc_gNB_get_ue_context(gnb_rrc_inst, ctxt_pP->rnti), + CC_id); + break; + } + + LOG_D(NR_RRC, "c_rnti is %x\n", c_rnti); + ue_context_p = rrc_gNB_get_ue_context(RC.nrrrc[ctxt_pP->module_id], c_rnti); + + if (ue_context_p == NULL) { + LOG_E(NR_RRC, + PROTOCOL_NR_RRC_CTXT_UE_FMT" NR_RRCReestablishmentRequest without UE context, fallback to RRC establishment\n", + PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP)); + rrc_gNB_generate_RRCSetup(ctxt_pP, + rrc_gNB_get_ue_context(gnb_rrc_inst, ctxt_pP->rnti), + CC_id); + break; + } + + int UE_id = find_nr_UE_id(ctxt_pP->module_id, c_rnti); + + if(UE_id == -1) { + LOG_E(NR_RRC, + PROTOCOL_NR_RRC_CTXT_UE_FMT" NR_RRCReestablishmentRequest without UE_id(MAC) rnti %x, fallback to RRC establishment\n", + PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP),c_rnti); + rrc_gNB_generate_RRCSetup(ctxt_pP, + rrc_gNB_get_ue_context(gnb_rrc_inst, ctxt_pP->rnti), + CC_id); + break; + } + + //previous rnti + rnti_t previous_rnti = 0; + + for (i = 0; i < MAX_MOBILES_PER_ENB; i++) { + if (reestablish_rnti_map[i][1] == c_rnti) { + previous_rnti = reestablish_rnti_map[i][0]; + break; + } + } + + if(previous_rnti != 0) { + UE_id = find_nr_UE_id(ctxt_pP->module_id, previous_rnti); + + if(UE_id == -1) { + LOG_E(NR_RRC, + PROTOCOL_NR_RRC_CTXT_UE_FMT" RRCReestablishmentRequest without UE_id(MAC) previous rnti %x, fallback to RRC establishment\n", + PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP),previous_rnti); + rrc_gNB_generate_RRCSetup(ctxt_pP, + rrc_gNB_get_ue_context(gnb_rrc_inst, ctxt_pP->rnti), + CC_id); + break; + } + } + + //c-plane not end + if((ue_context_p->ue_context.Status != NR_RRC_RECONFIGURED) && (ue_context_p->ue_context.reestablishment_cause == NR_ReestablishmentCause_spare1)) { + LOG_E(NR_RRC, + PROTOCOL_NR_RRC_CTXT_UE_FMT" NR_RRCReestablishmentRequest (UE %x c-plane is not end), fallback to RRC establishment\n", + PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP),c_rnti); + rrc_gNB_generate_RRCSetup(ctxt_pP, + rrc_gNB_get_ue_context(gnb_rrc_inst, ctxt_pP->rnti), + CC_id); + break; + } + + if(ue_context_p->ue_context.ue_reestablishment_timer > 0) { + LOG_E(NR_RRC, + PROTOCOL_NR_RRC_CTXT_UE_FMT" RRRCReconfigurationComplete(Previous) don't receive, delete the Previous UE,\nprevious Status %d, new Status NR_RRC_RECONFIGURED\n", + PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP), + ue_context_p->ue_context.Status + ); + ue_context_p->ue_context.Status = NR_RRC_RECONFIGURED; + protocol_ctxt_t ctxt_old_p; + PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt_old_p, + ctxt_pP->instance, + GNB_FLAG_YES, + c_rnti, + ctxt_pP->frame, + ctxt_pP->subframe); + rrc_gNB_process_RRCReconfigurationComplete(&ctxt_old_p, + ue_context_p, + ue_context_p->ue_context.reestablishment_xid); + + for (uint8_t pdusessionid = 0; pdusessionid < ue_context_p->ue_context.nb_of_pdusessions; pdusessionid++) { + if (ue_context_p->ue_context.pdusession[pdusessionid].status == PDU_SESSION_STATUS_DONE) { + ue_context_p->ue_context.pdusession[pdusessionid].status = PDU_SESSION_STATUS_ESTABLISHED; + } else { + ue_context_p->ue_context.pdusession[pdusessionid].status = PDU_SESSION_STATUS_FAILED; + } + } + } + + LOG_D(NR_RRC, + PROTOCOL_NR_RRC_CTXT_UE_FMT" UE context: %p\n", + PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP), + ue_context_p); + /* reset timers */ + ue_context_p->ue_context.ul_failure_timer = 0; + ue_context_p->ue_context.ue_release_timer = 0; + ue_context_p->ue_context.ue_reestablishment_timer = 0; + // ue_context_p->ue_context.ue_release_timer_s1 = 0; + ue_context_p->ue_context.ue_release_timer_rrc = 0; + ue_context_p->ue_context.reestablishment_xid = -1; + + // insert C-RNTI to map + for (i = 0; i < MAX_MOBILES_PER_ENB; i++) { + if (reestablish_rnti_map[i][0] == 0) { + reestablish_rnti_map[i][0] = ctxt_pP->rnti; + reestablish_rnti_map[i][1] = c_rnti; + LOG_D(NR_RRC, "reestablish_rnti_map[%d] [0] %x, [1] %x\n", + i, reestablish_rnti_map[i][0], reestablish_rnti_map[i][1]); + break; + } + } + + ue_context_p->ue_context.reestablishment_cause = rrcReestablishmentRequest.reestablishmentCause; + LOG_D(NR_RRC, PROTOCOL_NR_RRC_CTXT_UE_FMT" Accept reestablishment request from UE physCellId %ld cause %ld\n", + PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP), + rrcReestablishmentRequest.ue_Identity.physCellId, + ue_context_p->ue_context.reestablishment_cause); + + ue_context_p->ue_context.primaryCC_id = CC_id; + //LG COMMENT Idx = (ue_mod_idP * NB_RB_MAX) + DCCH; + Idx = DCCH; + // SRB1 + ue_context_p->ue_context.Srb1.Active = 1; + ue_context_p->ue_context.Srb1.Srb_info.Srb_id = Idx; + memcpy(&ue_context_p->ue_context.Srb1.Srb_info.Lchan_desc[0], + &DCCH_LCHAN_DESC, + LCHAN_DESC_SIZE); + memcpy(&ue_context_p->ue_context.Srb1.Srb_info.Lchan_desc[1], + &DCCH_LCHAN_DESC, + LCHAN_DESC_SIZE); + // SRB2: set it to go through SRB1 with id 1 (DCCH) + ue_context_p->ue_context.Srb2.Active = 1; + ue_context_p->ue_context.Srb2.Srb_info.Srb_id = Idx; + memcpy(&ue_context_p->ue_context.Srb2.Srb_info.Lchan_desc[0], + &DCCH_LCHAN_DESC, + LCHAN_DESC_SIZE); + memcpy(&ue_context_p->ue_context.Srb2.Srb_info.Lchan_desc[1], + &DCCH_LCHAN_DESC, + LCHAN_DESC_SIZE); + // rrc_gNB_generate_RRCConnectionReestablishment(ctxt_pP, ue_context_p, CC_id); + LOG_I(NR_RRC, PROTOCOL_NR_RRC_CTXT_UE_FMT"CALLING RLC CONFIG SRB1 (rbid %d)\n", + PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP), + Idx); + MSC_LOG_TX_MESSAGE(MSC_RRC_GNB, + MSC_PDCP_GNB, + NULL, + 0, + MSC_AS_TIME_FMT" CONFIG_REQ UE %x SRB", + MSC_AS_TIME_ARGS(ctxt_pP), + ue_context_p->ue_context.rnti); + nr_rrc_pdcp_config_asn1_req(ctxt_pP, + ue_context_p->ue_context.SRB_configList, + NULL, + NULL, + 0xff, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL); + + // if (!NODE_IS_CU(RC.nrrrc[ctxt_pP->module_id]->node_type)) { + nr_rrc_rlc_config_asn1_req(ctxt_pP, + ue_context_p->ue_context.SRB_configList, + NULL, + NULL, + NULL, + NULL); + // } + } + break; case NR_UL_CCCH_MessageType__c1_PR_rrcSystemInfoRequest: LOG_I(NR_RRC, "receive rrcSystemInfoRequest message \n"); diff --git a/openair2/RRC/NR_UE/rrc_UE.c b/openair2/RRC/NR_UE/rrc_UE.c index 3bcb708464..fe5cc7e1f0 100755 --- a/openair2/RRC/NR_UE/rrc_UE.c +++ b/openair2/RRC/NR_UE/rrc_UE.c @@ -2740,3 +2740,35 @@ nr_rrc_ue_process_ueCapabilityEnquiry( } } } + +//----------------------------------------------------------------------------- +void rrc_ue_generate_RRCReestablishmentRequest( const protocol_ctxt_t *const ctxt_pP, const uint8_t gNB_index ) +{ + if(NR_UE_rrc_inst[ctxt_pP->module_id].Srb0[gNB_index].Tx_buffer.payload_size ==0) { + NR_UE_rrc_inst[ctxt_pP->module_id].Srb0[gNB_index].Tx_buffer.payload_size = + do_RRCReestablishmentRequest( + ctxt_pP->module_id, + (uint8_t *)NR_UE_rrc_inst[ctxt_pP->module_id].Srb0[gNB_index].Tx_buffer.Payload); + LOG_I(NR_RRC,"[UE %d] : Frame %d, Logical Channel UL-CCCH (SRB0), Generating RRCReestablishmentRequest (bytes %d, gNB %d)\n", + ctxt_pP->module_id, ctxt_pP->frame, NR_UE_rrc_inst[ctxt_pP->module_id].Srb0[gNB_index].Tx_buffer.payload_size, gNB_index); + + for (int i=0; imodule_id].Srb0[gNB_index].Tx_buffer.payload_size; i++) { + LOG_T(NR_RRC,"%x.",NR_UE_rrc_inst[ctxt_pP->module_id].Srb0[gNB_index].Tx_buffer.Payload[i]); + } + + LOG_T(NR_RRC,"\n"); + +#ifdef ITTI_SIM + MessageDef *message_p; + uint8_t *message_buffer; + message_buffer = itti_malloc (TASK_RRC_NRUE,TASK_RRC_GNB_SIM, + NR_UE_rrc_inst[ctxt_pP->module_id].Srb0[gNB_index].Tx_buffer.payload_size); + memcpy (message_buffer, (uint8_t*)NR_UE_rrc_inst[ctxt_pP->module_id].Srb0[gNB_index].Tx_buffer.Payload, + NR_UE_rrc_inst[ctxt_pP->module_id].Srb0[gNB_index].Tx_buffer.payload_size); + message_p = itti_alloc_new_message (TASK_RRC_NRUE, UE_RRC_CCCH_DATA_IND); + GNB_RRC_CCCH_DATA_IND (message_p).sdu = message_buffer; + GNB_RRC_CCCH_DATA_IND (message_p).size = NR_UE_rrc_inst[ctxt_pP->module_id].Srb0[gNB_index].Tx_buffer.payload_size; + itti_send_msg_to_task (TASK_RRC_GNB_SIM, ctxt_pP->instance, message_p); +#endif + } +} diff --git a/openair2/SIMULATION/NR_RRC/itti_sim.c b/openair2/SIMULATION/NR_RRC/itti_sim.c index 97be340e8e..8ce99337cf 100644 --- a/openair2/SIMULATION/NR_RRC/itti_sim.c +++ b/openair2/SIMULATION/NR_RRC/itti_sim.c @@ -84,7 +84,7 @@ int config_sync_var=-1; openair0_config_t openair0_cfg[MAX_CARDS]; -volatile int start_gNB = 0; +//volatile int start_gNB = 0; volatile int oai_exit = 0; //static int wait_for_sync = 0;