Patent ID: 8948163
Filing Date: 2015-02-03
Classification: H04W

Abstract:
1. A method of managing circuit-switched calls in a mobile communications system supporting packet-switched data exchange and comprising at least one support node adapted to manage packet-switched sessions, comprising: providing a call management function responsive to user command within subscription data of a user; upon request by the user, having the call management function command inclusion in the user's subscription data of terminating customized application for mobile network enhanced logic (CAMEL) subscription information (T-CSI) category data, said T-CSI category data comprising information allowing the mobile switching center to identify the call management function as the CAMEL service control function responsible for management of circuit-switched calls; upon reception by the mobile communications system of a circuit-switched call for a user of the mobile communications system, and before informing the user about the circuit-switched call, having a mobile switching center interrogate the call management function for receiving instructions about how to proceed with the routing of the circuit-switched call, said call management function being configured as a CAMEL service control function adapted to interact with said mobile switching center; responsive to the interrogation by the mobile switching center, ascertaining whether the user is engaged in a packet-switched session; and in the affirmative case, having the call management function instruct the at least one support node to at least temporarily release the packet-switched session prior to informing the user about the circuit-switched call and prior to having the call management function authorize the mobile switching center to proceed with the routing of the circuit-switched call.