GTPCv2 (GTPC-EP or Service) Call Flow
This section describes the GTPCv2 (GTPC-EP or Service) call flow.

Step |
Description |
---|---|
1 |
The MME sends the GTPC-EP message request to the UDP Proxy. |
2 |
The UDP Proxy processes handleProtoUDPMessage and send ProtocolIPCSender to the GTPC-EP. |
3 |
The GTPC-EP processes ProcessUDPRequest and sends GtpServiceUsrIPCSender to the SGW-SVC. |
4 |
The SGW-SVC processes and sends doGtpSyncIPCExchg to the GTPC-EP. |
5 |
The GTPC-EP sends sendMsgtoUdpProxy to the UDP Proxy. |
6 |
The UDP Proxy processes handleProtocolIPCMessage and sendUDP messages to the PGW. |
7 |
The GTPC-EP processes the following requests:
|
8 |
The GTPC-EP sends the request timed out message to the UDP Proxy. |
9 |
The UDP Proxy processes handleProtocolIPCMessage and sendUDP messages to the PGW. |
10 |
The SGW-SVC receives the Timeout failure response when the retransmit_count is equal to the N3, and no response is received. |
11 |
The SGW-SVC sends SendFailureResponse to the GTPC-EP, with the cause as Peer not Responding. |
12 |
The GTPC-EP sends sendMsgtoUdpProxy to the UDP Proxy. |
13 |
The UDP Proxy processes handleProtocolIPCMessage and sendUDP messages to the MME. |