Patent ID: 9071610
Filing Date: 2015-06-30
Classification: H04L,H04W

Abstract:
1. A method for adding a media stream for a multimedia session, comprising: controlling, by an application server, a first user equipment to establish a multimedia session with a second user equipment; receiving, by the application server, a media stream adding request directed at the multimedia session sent by the first user equipment, wherein the media stream adding request comprises an identity of a third user equipment and a media type of a media stream requested to be added, wherein the media stream adding request is realized through a Subscribe message of the SIP, wherein the Subscribe message comprises the media stream type and the identity of a third user equipment, and wherein the first user equipment and the third user equipment both register using an identical public user identity; sending, by the application server, to the third user equipment a session Invite, wherein the session Invite includes, as an address of a calling party, the address of an identity of the second user equipment; controlling, by the application server, the third user equipment and the second user equipment to perform a media information negotiation directed at the media type; and wherein a gr parameter of a Globally Routable User Agent (UA) URIs (GRUU) of the first user equipment and a gr parameter of a GRUU of the third user equipment are set to different values to differentiate the first user equipment and the third user equipment.