Patent ID: 8379655
Filing Date: 2013-02-19
Classification: H04L

Abstract:
1. A data network comprising: at least one policy manager arranged to reserve communication resource for call sessions, a plurality of proxy-call session control functions serving user equipments, each proxy-call session control function of the plurality of proxy-call session control functions being arranged to request resource reservation from an associated policy manager when initializing a call session for a user equipment served by the proxy-call session control function; a serving-call session control function arranged to: wherein at least one of a first proxy-call session control function of the set of proxy-call session control functions and a first policy manager supporting at least a proxy-call session control function of the set of proxy-call session control functions is arranged to restrict a combined resource reservation for a first and second user equipment of the set of terminating user equipments to a resource requirement of only one of the first and second user equipment in response to a detection that call session initialization messages for the first and second user equipment have matching session identity indications and forking indications indicative of a forked call session setup, and wherein the serving-call session control function is arranged to determine a serving policy manager for each proxy-call session control functions of the set of proxy-call session control functions, and to include the forking indication only for proxy-call session control functions of the set of proxy-call session control functions that have a common serving policy manager.