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NGAP Path Switch Request: add encode and ITTI support

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- Add a case in TASK_NGAP to support ITTI message from RRC to NGAP
- Add Path Switch Request message type definitions
- Implement encoder for Path Switch Request (3GPP TS 38.413v16.2.0 §9.2.3.8)
    - RAN UE NGAP ID (M)
    - Source AMF UE NGAP ID (M)
    - User Location Information (M)
    - UE Security Capabilities (M)
    - PDU Session Resource to be Switched in Downlink List (M)
- Add required ASN.1 header includes for Path Switch Request IEs

Co-authored-by: Rakesh BB <rakesh.bb@fsid-iisc.in>
Signed-off-by: Venkatareddy Akumalla <venkatareddy.akumalla@openairinterface.org>
This commit is contained in:
Venkatareddy Akumalla
2026-06-16 05:41:01 +00:00
parent f3589d97c2
commit db7dbda8e2
8 changed files with 177 additions and 0 deletions
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1
openair2/COMMON/ngap_messages_def.h
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@@ -53,6 +53,7 @@ MESSAGE_DEF(NGAP_HANDOVER_CANCEL, MESSAGE_PRIORITY_MED, ngap_handover_cancel_t,
MESSAGE_DEF(NGAP_UL_RAN_STATUS_TRANSFER, MESSAGE_PRIORITY_MED, ngap_ran_status_transfer_t, ngap_ul_ran_status_transfer)
MESSAGE_DEF(NGAP_DL_RAN_STATUS_TRANSFER, MESSAGE_PRIORITY_MED, ngap_ran_status_transfer_t, ngap_dl_ran_status_transfer)
MESSAGE_DEF(NGAP_RECONNECT_TIMER, MESSAGE_PRIORITY_MED, IttiMsgText, ngap_gNB_amf_data)
MESSAGE_DEF(NGAP_PATH_SWITCH_REQ, MESSAGE_PRIORITY_MED, ngap_path_switch_req_t, ngap_path_switch_req)
/* NGAP -> RRC messages */
MESSAGE_DEF(NGAP_DOWNLINK_NAS , MESSAGE_PRIORITY_MED, ngap_downlink_nas_t , ngap_downlink_nas )

17
openair2/COMMON/ngap_messages_types.h
View File

@@ -47,6 +47,7 @@
#define NGAP_HANDOVER_NOTIFY(mSGpTR) (mSGpTR)->ittiMsg.ngap_handover_notify
#define NGAP_HANDOVER_CANCEL(mSGpTR) (mSGpTR)->ittiMsg.ngap_handover_cancel
#define NGAP_HANDOVER_CANCEL_ACK(mSGpTR) (mSGpTR)->ittiMsg.ngap_handover_cancel_ack
#define NGAP_PATH_SWITCH_REQ(mSGpTR) (mSGpTR)->ittiMsg.ngap_path_switch_req
#define NGAP_UE_CONTEXT_RELEASE_REQ(mSGpTR) (mSGpTR)->ittiMsg.ngap_ue_release_req
#define NGAP_PDUSESSION_RELEASE_COMMAND(mSGpTR) (mSGpTR)->ittiMsg.ngap_pdusession_release_command
@@ -669,6 +670,22 @@ typedef struct {
uint64_t amf_ue_ngap_id;
} ngap_handover_cancel_ack_t;
/* Path Switch Request 9.2.3.8 3GPP TS 38.413 */
typedef struct ngap_path_switch_req_s {
// RAN UE NGAP ID
uint32_t gNB_ue_ngap_id;
// Source AMF UE NGAP ID
uint64_t amf_ue_ngap_id;
// User Location Information
user_location_information_t user_info;
// UE Security Capabilities
ngap_security_capabilities_t security_capabilities;
// Number of pdusession to be switched in the downlink list
uint16_t nb_of_pdusessions;
// List of PDU Session Resource to be Switched in Downlink
pdusession_setup_t pdusessions_tobeswitched[NR_MAX_NB_PDU_SESSIONS];
} ngap_path_switch_req_t;
typedef struct ngap_ue_cap_info_ind_s {
uint32_t gNB_ue_ngap_id;
byte_array_t ue_radio_cap;