Patent ID: 8260957
Filing Date: 2012-09-04
Classification: H04L

Abstract:
1. A method of operating a node of an IP Multimedia Subsystem (IMS), said IMS comprising nodes for performing predefined IMS functions, Application Servers (AS) for providing services to devices that access said IMS, and a Home Subscription Server (HSS) for holding user profiles for said devices, said method implemented by said node comprising the steps of: receiving, in said node, a user profile related to a registration in the IMS of an access point on behalf of a group of user terminals service by said access point, where the user profile contains initial filter criteria (IFC) operative to trigger the provision of services for said access point; determining, in said node, whether said user profile for said access point contains functioning instructions operative to change the predefined IMS functions of one or more IMS nodes and, if so, retrieving said functioning instructions from said user profile; storing, in said node, said functioning instructions together with a registered Public User Identity for said access point; and, in response to receiving a request containing said Public User Identity for an IMS service, executing, in said node, said functioning instructions instead of said predefined IMS functions, wherein the user profile further contains a wildcard Public User Identity associated with the user terminals serviced by said access point, and wherein said functioning instructions comprise a formatting rule instruction that defines for a field of a message from a source node to a destination node in the IMS a location of a substitute content for that field.