Patent ID: 9037727
Filing Date: 2015-05-19
Classification: H04L

Abstract:
1. A method of associating a session originating from a first user terminal to a second user terminal with a second session originating from the first user terminal to a third user terminal, wherein the first user terminal initiates the session with the second user terminal, the method comprising: selecting via the second user terminal a third user terminal from among multiple user terminals associated with the second user terminal; consulting via the second user terminal multiple associated user terminals, associated with the third user terminal, for obtaining Session Description Protocol (SDP) details of the associated user terminals; inserting via the second user terminal Globally Routable User Agent Uniform Resource Identification (GRUU) field of the third user terminal in the Refer-To header in the request to point to the third user terminal; sending a request from the second user terminal to the first user terminal for associating the session with the second session between the first user terminal and the third user terminal; checking via the first user terminal the media capability of the first user terminal on receipt of the request from the second user terminal; accepting at the first user terminal the request from the second user terminal on finding a match between the request and media capability of the first user terminal; initiating at the first user terminal an associated session with the third user terminal using an INVITE message; and accepting at the third user terminal the associated session.