SESSION INITIATION PROTOCOL MESSAGE PAYLOAD COMPRESSION

摘要

A method of transporting Session Initiation Protocol messages across an IP Multimedia network between a user terminal (1) and a Session Initiation Protocol Application Server (2). The method comprising compressing message payloads within the application layer (4a, 5a) at the sending side and decompressing them at the application layer (4b, 5b) on the receiving side, compressed message payloads being passed between the application layer and a Session Initiation Protocol User Agent (3a) via an appropriate Application Programming Interface (7a).