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Add NGAP Handover Required message NGAP encoder and RRC callback on source NG-RAN

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This commit introduces the NG Mobility Management Procedure known as
Handover Preparation. The outbound message is sent by the source NG-RAN
and is known as Handover Required.

* introduce NGAP library for Mobility Management
* introduce NGAP IEs encoder functions for Handover Required and relevant common IEs
* handle RRC trigger in NGAP and Send NGAP Handover Required to the AMF

Co-authored-by: batuhan duyuler <batuhan.duyuler@firecell.io>
This commit is contained in:
Guido Casati
2025-09-18 11:34:30 +02:00
co-authored by batuhan duyuler
parent cfb654e77f
commit 20e534d483
13 changed files with 506 additions and 2 deletions
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openair3/NGAP/ngap_gNB_decoder.c
+10
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@@ -70,6 +70,12 @@ static int ngap_gNB_decode_initiating_message(NGAP_NGAP_PDU_t *pdu) {
NGAP_INFO("PDUSESSIONSetup initiating message\n");
break;
case NGAP_ProcedureCode_id_HandoverPreparation:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_NGAP_NGAP_PDU, pdu);
free(res.buffer);
NGAP_INFO("Handover Preparation initiating message\n");
break;
case NGAP_ProcedureCode_id_PDUSessionResourceModify:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_NGAP_NGAP_PDU, pdu);
free(res.buffer);
@@ -119,6 +125,10 @@ static int ngap_gNB_decode_successful_outcome(NGAP_NGAP_PDU_t *pdu) {
free(res.buffer);
break;
case NGAP_ProcedureCode_id_HandoverPreparation:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_NGAP_NGAP_PDU, pdu);
free(res.buffer);
break;
default:
NGAP_ERROR("Unknown procedure ID (%d) for successfull outcome message\n",