Patent ID: 8799484
Filing Date: 2014-08-05
Classification: H04L,H04M

Abstract:
1. A method of facilitating transfer of an existing session from a first user device to a second user device, the method comprising: the existing session being established between the first user device and a remote party and the existing session including a first leg between the first user device and a server and a second leg between the server and the remote party, the server storing a first association between a user address and the first user device and a second association between the user address and the second user device, the user address comprising a Session Initiation Protocol (SIP) Uniform Resource Identifier (URI), the first user device having a first Globally Routable User Agent URI (GRUU) based on the SIP URI, and the second user device having a second GRUU based on the SIP URI; receiving, at the server, a session invitation message from the second user device containing a reference to the existing session with an instruction to replace the first user device; verifying from the stored first and second associations that the GRUU of the second user device is based on a same SIP URI as that included in the user address associated with the first user device, said verifying performed by the server without further communication with the remote party; accepting the session invitation message from the second user device to establish a new leg between the second user device and the server; joining the new leg with the second leg of the existing session to enable an exchange of media between the second user device and the remote party; and terminating the first leg of the existing session.