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nr: improve x2/rrc for ENDC

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This commit introduces several enhancements in X2AP and RRC to deal
with ENDC. The main goal is to deal with UE's on/off and with various
errors.

The following work is included:

    - DC prep and DC overall X2 timers
    - X2 messages for UE release and DC timers' timeout

Open problems:

    - what to do when the UE sends an scg Failure? This commit removes
      the UE. And this removal may not be correctly done
    - UE removal in the gNB's PHY layer (a next commit is coming,
      but it is hackish and will need a rework)
This commit is contained in:
Cedric Roux
2020-09-22 11:57:31 +02:00
parent 5372a3478a
commit 4236ff2b3e
103 changed files with 1235 additions and 160 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair2/X2AP/x2ap_eNB_generate_messages.c
+226 -5
View File
@@ -1668,8 +1668,6 @@ int x2ap_gNB_generate_ENDC_x2_SgNB_addition_request_ACK( x2ap_eNB_instance_t *in
uint32_t len;
int ret = 0;
int MeNB_UE_X2AP_id = x2ap_sgnb_addition_req_ACK->MeNB_ue_x2_id;
int SgNB_UE_X2AP_id = ue_id;
int e_rabs_admitted_tobeadded = x2ap_sgnb_addition_req_ACK->nb_e_rabs_admitted_tobeadded;
long int pDCPatSgNB = X2AP_EN_DC_ResourceConfiguration__pDCPatSgNB_present;
long int mCGresources = X2AP_EN_DC_ResourceConfiguration__mCGresources_not_present;
@@ -1694,7 +1692,7 @@ int x2ap_gNB_generate_ENDC_x2_SgNB_addition_request_ACK( x2ap_eNB_instance_t *in
ie->id = X2AP_ProtocolIE_ID_id_MeNB_UE_X2AP_ID;
ie->criticality= X2AP_Criticality_reject;
ie->value.present = X2AP_SgNBAdditionRequestAcknowledge_IEs__value_PR_UE_X2AP_ID;
ie->value.choice.UE_X2AP_ID = MeNB_UE_X2AP_id; //x2ap_id_get_id_source(&instance_p->id_manager, ue_id);
ie->value.choice.UE_X2AP_ID = x2ap_id_get_id_source(&instance_p->id_manager, ue_id);
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
// SgNB_UE_X2AP_id
@@ -1702,7 +1700,7 @@ int x2ap_gNB_generate_ENDC_x2_SgNB_addition_request_ACK( x2ap_eNB_instance_t *in
ie->id = X2AP_ProtocolIE_ID_id_SgNB_UE_X2AP_ID;
ie->criticality= X2AP_Criticality_reject;
ie->value.present = X2AP_SgNBAdditionRequestAcknowledge_IEs__value_PR_SgNB_UE_X2AP_ID;
ie->value.choice.UE_X2AP_ID = SgNB_UE_X2AP_id; //x2ap_id_get_id_source(&instance_p->id_manager, ue_id);
ie->value.choice.UE_X2AP_ID = x2ap_id_get_id_target(&instance_p->id_manager, ue_id);
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
ie = (X2AP_SgNBAdditionRequestAcknowledge_IEs_t *)calloc(1, sizeof(X2AP_SgNBAdditionRequestAcknowledge_IEs_t));
@@ -1792,7 +1790,7 @@ int x2ap_eNB_generate_ENDC_x2_SgNB_reconfiguration_complete(
ie->id = X2AP_ProtocolIE_ID_id_MeNB_UE_X2AP_ID;
ie->criticality= X2AP_Criticality_reject;
ie->value.present = X2AP_SgNBReconfigurationComplete_IEs__value_PR_UE_X2AP_ID;
ie->value.choice.UE_X2AP_ID = ue_id; //x2ap_id_get_id_source(&instance_p->id_manager, ue_id);
ie->value.choice.UE_X2AP_ID = x2ap_id_get_id_source(&instance_p->id_manager, ue_id);
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
ie = (X2AP_SgNBReconfigurationComplete_IEs_t *)calloc(1, sizeof(X2AP_SgNBReconfigurationComplete_IEs_t));
@@ -1821,3 +1819,226 @@ int x2ap_eNB_generate_ENDC_x2_SgNB_reconfiguration_complete(
return ret;
}
int x2ap_eNB_generate_ENDC_x2_SgNB_release_request(
x2ap_eNB_instance_t *instance_p, x2ap_eNB_data_t *x2ap_eNB_data_p,
int x2_id_source, int x2_id_target, x2ap_cause_t cause)
{
X2AP_X2AP_PDU_t pdu;
X2AP_SgNBReleaseRequest_t *out;
X2AP_SgNBReleaseRequest_IEs_t *ie;
uint8_t *buffer;
uint32_t len;
int ret = 0;
DevAssert(instance_p != NULL);
DevAssert(x2ap_eNB_data_p != NULL);
memset(&pdu, 0, sizeof(pdu));
pdu.present = X2AP_X2AP_PDU_PR_initiatingMessage;
pdu.choice.initiatingMessage.procedureCode = X2AP_ProcedureCode_id_meNBinitiatedSgNBRelease;
pdu.choice.initiatingMessage.criticality = X2AP_Criticality_ignore;
pdu.choice.initiatingMessage.value.present = X2AP_InitiatingMessage__value_PR_SgNBReleaseRequest;
out = &pdu.choice.initiatingMessage.value.choice.SgNBReleaseRequest;
ie = (X2AP_SgNBReleaseRequest_IEs_t *)calloc(1, sizeof(X2AP_SgNBReleaseRequest_IEs_t));
ie->id = X2AP_ProtocolIE_ID_id_MeNB_UE_X2AP_ID;
ie->criticality= X2AP_Criticality_reject;
ie->value.present = X2AP_SgNBReleaseRequest_IEs__value_PR_UE_X2AP_ID;
ie->value.choice.UE_X2AP_ID = x2_id_source;
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
if (x2_id_target != -1) {
ie = (X2AP_SgNBReleaseRequest_IEs_t *)calloc(1, sizeof(X2AP_SgNBReleaseRequest_IEs_t));
ie->id = X2AP_ProtocolIE_ID_id_SgNB_UE_X2AP_ID;
ie->criticality= X2AP_Criticality_reject;
ie->value.present = X2AP_SgNBReleaseRequest_IEs__value_PR_SgNB_UE_X2AP_ID;
ie->value.choice.SgNB_UE_X2AP_ID = x2_id_target;
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
}
ie = (X2AP_SgNBReleaseRequest_IEs_t *)calloc(1, sizeof(X2AP_SgNBReleaseRequest_IEs_t));
ie->id = X2AP_ProtocolIE_ID_id_Cause;
ie->criticality= X2AP_Criticality_ignore;
ie->value.present = X2AP_SgNBReleaseRequest_IEs__value_PR_Cause;
switch (cause) {
case X2AP_CAUSE_T_DC_PREP_TIMEOUT:
ie->value.choice.Cause.present = X2AP_Cause_PR_radioNetwork;
ie->value.choice.Cause.choice.radioNetwork = X2AP_CauseRadioNetwork_tDCprep_expiry;
break;
case X2AP_CAUSE_RADIO_CONNECTION_WITH_UE_LOST:
ie->value.choice.Cause.present = X2AP_Cause_PR_radioNetwork;
ie->value.choice.Cause.choice.radioNetwork = X2AP_CauseRadioNetwork_radio_connection_with_UE_lost;
break;
default:
X2AP_ERROR("%s: unhandled cause %d\n", __FUNCTION__, cause);
exit(1);
}
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
if (x2ap_eNB_encode_pdu(&pdu, &buffer, &len) < 0) {
X2AP_ERROR("Failed to encode ENDC X2 SgNB_release_request message\n");
return -1;
}
x2ap_eNB_itti_send_sctp_data_req(instance_p->instance, x2ap_eNB_data_p->assoc_id, buffer, len, 0);
return ret;
}
int x2ap_gNB_generate_ENDC_x2_SgNB_release_request_acknowledge(
x2ap_eNB_instance_t *instance_p, x2ap_eNB_data_t *x2ap_eNB_data_p,
int menb_ue_x2ap_id, int sgnb_ue_x2ap_id)
{
X2AP_X2AP_PDU_t pdu;
X2AP_SgNBReleaseRequestAcknowledge_t *out;
X2AP_SgNBReleaseRequestAcknowledge_IEs_t *ie;
uint8_t *buffer;
uint32_t len;
int ret = 0;
DevAssert(instance_p != NULL);
DevAssert(x2ap_eNB_data_p != NULL);
x2ap_eNB_data_p->state = X2AP_ENB_STATE_WAITING;
memset(&pdu, 0, sizeof(pdu));
pdu.present = X2AP_X2AP_PDU_PR_successfulOutcome;
pdu.choice.successfulOutcome.procedureCode = X2AP_ProcedureCode_id_meNBinitiatedSgNBRelease;
pdu.choice.successfulOutcome.criticality = X2AP_Criticality_ignore;
pdu.choice.successfulOutcome.value.present = X2AP_SuccessfulOutcome__value_PR_SgNBReleaseRequestAcknowledge;
out = &pdu.choice.successfulOutcome.value.choice.SgNBReleaseRequestAcknowledge;
ie = (X2AP_SgNBReleaseRequestAcknowledge_IEs_t *)calloc(1, sizeof(X2AP_SgNBReleaseRequestAcknowledge_IEs_t));
ie->id = X2AP_ProtocolIE_ID_id_MeNB_UE_X2AP_ID;
ie->criticality= X2AP_Criticality_ignore;
ie->value.present = X2AP_SgNBReleaseRequestAcknowledge_IEs__value_PR_UE_X2AP_ID;
ie->value.choice.UE_X2AP_ID = menb_ue_x2ap_id;
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
ie = (X2AP_SgNBReleaseRequestAcknowledge_IEs_t *)calloc(1, sizeof(X2AP_SgNBReleaseRequestAcknowledge_IEs_t));
ie->id = X2AP_ProtocolIE_ID_id_SgNB_UE_X2AP_ID;
ie->criticality= X2AP_Criticality_ignore;
ie->value.present = X2AP_SgNBReleaseRequestAcknowledge_IEs__value_PR_SgNB_UE_X2AP_ID;
ie->value.choice.SgNB_UE_X2AP_ID = sgnb_ue_x2ap_id;
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
if (x2ap_eNB_encode_pdu(&pdu, &buffer, &len) < 0) {
X2AP_ERROR("Failed to encode ENDC X2 SgNB Release Request Acknowledge\n");
return -1;
}
x2ap_eNB_itti_send_sctp_data_req(instance_p->instance, x2ap_eNB_data_p->assoc_id, buffer, len, 0);
return ret;
}
int x2ap_eNB_generate_ENDC_x2_SgNB_release_required(
x2ap_eNB_instance_t *instance_p, x2ap_eNB_data_t *x2ap_eNB_data_p,
int x2_id_source, int x2_id_target, x2ap_cause_t cause)
{
X2AP_X2AP_PDU_t pdu;
X2AP_SgNBReleaseRequired_t *out;
X2AP_SgNBReleaseRequired_IEs_t *ie;
uint8_t *buffer;
uint32_t len;
int ret = 0;
DevAssert(instance_p != NULL);
DevAssert(x2ap_eNB_data_p != NULL);
/* Prepare the X2AP message to encode */
memset(&pdu, 0, sizeof(pdu));
pdu.present = X2AP_X2AP_PDU_PR_initiatingMessage;
pdu.choice.initiatingMessage.procedureCode = X2AP_ProcedureCode_id_sgNBinitiatedSgNBRelease;
pdu.choice.initiatingMessage.criticality = X2AP_Criticality_reject;
pdu.choice.initiatingMessage.value.present = X2AP_InitiatingMessage__value_PR_SgNBReleaseRequired;
out = &pdu.choice.initiatingMessage.value.choice.SgNBReleaseRequired;
ie = (X2AP_SgNBReleaseRequired_IEs_t *)calloc(1, sizeof(X2AP_SgNBReleaseRequired_IEs_t));
ie->id = X2AP_ProtocolIE_ID_id_MeNB_UE_X2AP_ID;
ie->criticality= X2AP_Criticality_reject;
ie->value.present = X2AP_SgNBReleaseRequired_IEs__value_PR_UE_X2AP_ID;
ie->value.choice.UE_X2AP_ID = x2_id_source;
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
ie = (X2AP_SgNBReleaseRequired_IEs_t *)calloc(1, sizeof(X2AP_SgNBReleaseRequired_IEs_t));
ie->id = X2AP_ProtocolIE_ID_id_SgNB_UE_X2AP_ID;
ie->criticality= X2AP_Criticality_reject;
ie->value.present = X2AP_SgNBReleaseRequired_IEs__value_PR_SgNB_UE_X2AP_ID;
ie->value.choice.SgNB_UE_X2AP_ID = x2_id_target;
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
ie = (X2AP_SgNBReleaseRequired_IEs_t *)calloc(1, sizeof(X2AP_SgNBReleaseRequired_IEs_t));
ie->id = X2AP_ProtocolIE_ID_id_Cause;
ie->criticality= X2AP_Criticality_ignore;
ie->value.present = X2AP_SgNBReleaseRequired_IEs__value_PR_Cause;
switch (cause) {
case X2AP_CAUSE_T_DC_OVERALL_TIMEOUT:
ie->value.choice.Cause.present = X2AP_Cause_PR_radioNetwork;
ie->value.choice.Cause.choice.radioNetwork = X2AP_CauseRadioNetwork_tDCoverall_expiry;
break;
default:
X2AP_ERROR("%s: unhandled cause %d\n", __FUNCTION__, cause);
exit(1);
}
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
if (x2ap_eNB_encode_pdu(&pdu, &buffer, &len) < 0) {
X2AP_ERROR("Failed to encode ENDC X2 SgNB_release_request message\n");
return -1;
}
x2ap_eNB_itti_send_sctp_data_req(instance_p->instance, x2ap_eNB_data_p->assoc_id, buffer, len, 0);
return ret;
}
int x2ap_gNB_generate_ENDC_x2_SgNB_release_confirm(
x2ap_eNB_instance_t *instance_p, x2ap_eNB_data_t *x2ap_eNB_data_p,
int menb_ue_x2ap_id, int sgnb_ue_x2ap_id)
{
X2AP_X2AP_PDU_t pdu;
X2AP_SgNBReleaseConfirm_t *out;
X2AP_SgNBReleaseConfirm_IEs_t *ie;
uint8_t *buffer;
uint32_t len;
int ret = 0;
DevAssert(instance_p != NULL);
DevAssert(x2ap_eNB_data_p != NULL);
memset(&pdu, 0, sizeof(pdu));
pdu.present = X2AP_X2AP_PDU_PR_successfulOutcome;
pdu.choice.successfulOutcome.procedureCode = X2AP_ProcedureCode_id_sgNBinitiatedSgNBRelease;
pdu.choice.successfulOutcome.criticality = X2AP_Criticality_reject;
pdu.choice.successfulOutcome.value.present = X2AP_SuccessfulOutcome__value_PR_SgNBReleaseConfirm;
out = &pdu.choice.successfulOutcome.value.choice.SgNBReleaseConfirm;
ie = (X2AP_SgNBReleaseConfirm_IEs_t *)calloc(1, sizeof(X2AP_SgNBReleaseConfirm_IEs_t));
ie->id = X2AP_ProtocolIE_ID_id_MeNB_UE_X2AP_ID;
ie->criticality= X2AP_Criticality_ignore;
ie->value.present = X2AP_SgNBReleaseConfirm_IEs__value_PR_UE_X2AP_ID;
ie->value.choice.UE_X2AP_ID = menb_ue_x2ap_id;
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
ie = (X2AP_SgNBReleaseConfirm_IEs_t *)calloc(1, sizeof(X2AP_SgNBReleaseConfirm_IEs_t));
ie->id = X2AP_ProtocolIE_ID_id_SgNB_UE_X2AP_ID;
ie->criticality= X2AP_Criticality_ignore;
ie->value.present = X2AP_SgNBReleaseConfirm_IEs__value_PR_SgNB_UE_X2AP_ID;
ie->value.choice.SgNB_UE_X2AP_ID = sgnb_ue_x2ap_id;
ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
if (x2ap_eNB_encode_pdu(&pdu, &buffer, &len) < 0) {
X2AP_ERROR("Failed to encode ENDC X2 SgNB Release Request Acknowledge\n");
return -1;
}
x2ap_eNB_itti_send_sctp_data_req(instance_p->instance, x2ap_eNB_data_p->assoc_id, buffer, len, 0);
return ret;
}