Patent ID: 8520687
Filing Date: 2013-08-27
Classification: H04L

Abstract:
1. A method for identifying end-to-end media paths though internet protocol realms using substitute session description protocol parameters comprising: receiving a message including a list of previously traversed through internet protocol realms for each media line associated with a multimedia session, wherein the multimedia session includes multiple media lines comprising at least two media lines traversing different media paths through the internet protocol realms; determining the next internet protocol realm for a media path for each media line associated with the multimedia session based at least in part on session initiation protocol signaling information; and for each media line associated with the multimedia session, if said next internet protocol realm for the corresponding media line is already associated with the same media line on said list of previously traversed through internet protocol realms, bypassing at least one border gateway associated with the previously traversed through internet protocol realms for the corresponding media line; wherein said session description protocol parameters are in an offer message and the method further comprises: receiving a session description protocol answer with session description protocol parameters for each media line; recalling said session description protocol parameters in said offer message for the corresponding media line; and manipulating said session description protocol parameters in said session description protocol answer in order to establish an end-to-end media path that bypasses one or more border gateways; wherein the session description protocol answer includes an unspecified address as connection information, the method further comprising: determining whether traversed internet protocol realm information in said session description protocol answer matches the internet protocol realm in connection with an ingoing or outgoing border gateway.