SESSION ESTABLISHMENT METHOD AND SYSTEM BASED ON DIALOG CORRELATION IDENTIFIER

摘要

A session establishment method based on a dialog correlation identifier is provided by the present invention, in which dialog correlation information for identifying the initiated dialog is set. The method also includes: the dialog correlation information is inserted into the call request initiated by the call request initiator; after receiving the call request, the Application Server (AS) which performs the Back to Back User Agent (B2BUA) behavior generates the call request which will be sent to the receiver of the call request, wherein the call request which will be sent to the receiver of the call request carries the dialog correlation information; after receiving the call request sent by the B2BUA, the receiver of the call request establishes the dialog and stores the dialog correlation information. A session establishment system based on a dialog correlation identifier is provided by the present invention simultaneously. The present invention implements the quickness of the dialog confirmation, is compatible with the prior session establishment flow simultaneously, and ensures the generality of the technical solution.