Patent ID: 9392437
Filing Date: 2016-07-12
CPC Classification: H04L,H04W

Claim Text:
1. A method of identifying alternative end-to-end media paths through internet protocol realms using substitute session description protocol parameters, the method comprising: receiving a session description protocol offer including a list of internet protocol realms, wherein the list of primary internet protocol realms includes one or more previously traversed through internet protocol realms and one or more secondary internet protocol realms; determining an outgoing internet protocol realm for a media path based at least in part on session initiation protocol signaling information; if the outgoing internet protocol realm matches one of the secondary internet protocol realms on the list of internet protocol realms in the session description protocol offer, bypassing at least one border gateway associated with at least one of the internet protocol realms on the list, and sending a session description protocol answer that includes an unspecified address as connection information and protocol realm information for the matching secondary internet protocol realm wherein the connection information for the protocol realm is the same as a remote connection information for the outgoing internet protocol realm; and receiving the session description protocol answer and determining whether internet protocol realm information in the session description protocol answer matches the internet protocol realm in connection with a controlled border gateway.