CONFERENCE RECONSTRUCTION IN SIP NETWORKS

摘要

During a Session Initiation Protocol dialog setup, the user agent sends an INVITE message with an SDP offer to the conference controller, and the conference controller provides to a media gateway a unique session identifier, a unique conference identifier, and optionally at least one of feature information and/or policy information. If the conference controller restarts, the media gateway may provide the conference controller the unique session identifier, the unique conference identifier, and the optional feature and/or policy information. The conference controller may then generate an out-of-dialog SIP REFER message that includes the unique session identifier and the unique conference identifier and provide the message to the user agent. The user agent, upon receiving the REFER message, may identify a dialog needing replacing, and may provide the conference controller a new INVITE message that allows the conference controller to reconstruct the SIP dialog and optional feature and/or policy information if needed.

主权项

1. A method of managing a Session Initiation Protocol (SIP) dialog between a network element and a conference controller, the method comprising:
determining that a signaling-disrupting event has occurred during a SIP conference call; and reestablishing the SIP dialog between the network element and the conference controller.