Call flow S1AP/SCTP - Heartbeat
- By default, an SCTP endpoint monitors the reachability of the idle destination transport address(es) of its peer by sending a HEARTBEAT chunk periodically to the destination transport address(es). The peersrespond with HEARTBEAT ACK.
- The last field (HB information) should be a sender-specific information field of some kind, for example a timestamp when the heartbeat was sent and a destination IP address. This is then returned in the
HEARTBEAT ACK chunk
S1AP/SCTP - Shutdown
SCTP supports also graceful close of an active association upon request from the SCTP user. The following
sequence of events occurs:
1. The client sends a SHUTDOWN signal to the server, which tells the server that the client is ready to close
the connection.
2. The server responds by sending a SHUTDOWN-ACK acknowledgement.
3. The client then sends a SHUTDOWN-COMPLETE signal back to the server.
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