Patent ID: 8451849
Filing Date: 2013-05-28
Classification: H04L

Abstract:
1. A method, comprising: receiving, in a server, a request for session initiation, wherein the session is a session of a real-time media communication service; detecting, in the server, that a terminating subscriber does not belong to a same subsystem as an originating subscriber; maintaining, in the server, transit server information that associates a group of subscribers with a transit server, wherein the association is based on identification information of subscriber and said transit server has access to a subscriber database of a subsystem of the associated terminating subscriber; determining, in the server, in response to detecting that the terminating subscriber does not belong to the same subsystem as the originating subscriber, with identification information on the terminating subscriber included in the request for session initiation, the transit server associated with the terminating subscriber; querying subscriber information related to the requested session with a first control message from the server to the transit server, wherein the first control message comprises parameters of the requested session; and initiating, in the server, the requested session according to the queried subscriber information.