METHOD FOR INFORMING MAINTENANCE STATE OF MEDIA SESSION

摘要

A method for informing a maintenance state of a media session is provided to make a proxy server determine whether the media session is normally operated by allowing the proxy server to receive an SIP message packet including a session maintenance region. A method for informing a maintenance state of a media session formed for the communication between a plurality of terminals includes the step of transmitting an SIP(Session Initiation Protocol) message packet including a session maintenance region to an SIP server by the plurality of terminals. The session maintenance region includes a CR(Carriage-Return)(321) and an LF(Line-Feed)(323) sequence.