Patent ID: 8135845
Filing Date: 2012-03-13
Classification: H04L

Abstract:
1. A method of managing Session Initiation Protocol (SIP)-based sessions in a first device, the first device comprising: activating a first communication service of an Internet Protocol Multimedia Subsystem (IMS) application at a first user's first request for the first communication service; assigning a session mapping identifier to a first session for the first communication service; sending, to a second device of a second user, a first session negotiation request including the assigned session mapping identifier, wherein the first session negotiation request is a first SIP message, wherein the assigned session mapping identifier is inserted into a newly defined field of a header of the first SIP message; receiving the first user's second request for a second communication service of the IMS application, the second communication service being different from the first communication service, the second request identifying the second user or device; in response to the second request, activating the second communication service; assigning the same session mapping identifier to a second session for the second communication service; sending to the second device a second session negotiation request including the same session mapping identifier, wherein the second session negotiation request is a second SIP message, wherein the same session mapping identifier is inserted into a newly defined field of a header of the second SIP message; and establishing the second session with the second device using the same session mapping identifier.