Patent ID: 9031057
Filing Date: 2015-05-12
Classification: H04L

Abstract:
1. A multimedia session call control method, comprising: performing, by a multi-User Equipment (UE) party, a multimedia session with a peer under control of an Application Server (AS); establishing, by a master UE of the multi-UE party, a session with a third party under control of the AS; binding, by the AS, a call leg between a slave UE of the multi-UE party and the AS to the session established with the third party such that the multi-UE party and the third party update a media information of the peer reciprocally through the bound call leg, negotiate the media information between the master UE and the third party, and establish a connection of media streams at a media layer; and sending, by the peer, a Refer message to the third party before the master UE of the multi-UE party establishes the session with the third party under the control of the AS, wherein the Refer message carries an address of the multi-UE party and an identifier (ID) of the call leg between the AS and the peer wherein the process of establishing the session with the third party under control of the AS by the master UE of the multi-UE party comprises; sending, by the third party, an Invite message to the AS, wherein the Invite message carries the address of the multi-UE party and the ID of the call leg; modifying, by the AS, the ID of the call leg in the Invite message to the ID of the call leg between the AS and the multi-UE party; sending the modified Invite message to the master UE; accepting, by the master UE, the invitation; returning an OK message to the AS; and returning, by the AS, the OK message to the third party.