METHOD FOR EXTENDING THE USE OF SIP (SESSION INITIATION PROTOCOL)

摘要

The present invention relates to a method for extending the use of SIP (Session Initiation Protocol), especially in a communication system wherein H.323 or SIP compliant end-points communicate with the media traffic directly between other H.323 or SIP compliant end-points, and wherein the signalling is sent to either a gatekeeper or an SIP server, and in which system the start of a conversation message in the associated SIP protocol is here called INVITE, and for the purpose of support an extension of the SIP protocol to provide better support for charging for thereby more easily to detect when a conversation is closed, it is according to the present invention suggested that extra INVITE messages are sent to said SIP server.