Patent ID: 8583804
Filing Date: 2013-11-12
Classification: G06Q,H04L

Abstract:
1. A Session Initiation Protocol Application Server for use within an IP Multimedia Subsystem, the Application Server comprising: a receiver configured to receive a Session Initiation Protocol message from a Serving Call Session Control Function, the Serving Call Session Control Function serving an IP Multimedia Subsystem user and the message containing within a message header an explicit identification of said user and one or more role values specifying the role of the served user in respect of the message; a processor configured to determine an action to be applied to said message and to apply the action to the message in dependence upon the specified role(s); and a transmitter configured to return the message to said Serving Call Session Control Function, wherein an action that can be applied by said processor is a privacy setting, and said processor is configured to determine from a role value contained within the message whether or not the served user is responsible for a call diversion and, if so, to apply privacy to only a history header of the message.