Packet-switched core network architecture for voice services on second- and third-generation wireless access networks

摘要

Communications systems and methods with an evolved packet-switched core network architecture to enable voice services on second- and third-generation wireless access networks. The systems and methods permit unmodified 2G and 3G mobile devices to conduct voice calls using conventional circuit-switched user-plane and control-plane protocols at the air interface while the voice calls are switched at the back-end using a packet-switched core network. The system may include a translation module at a controller component that is configured to provide both user-plane and control-plane translation functions between an unmodified 2G/3G mobile device that utilizes circuit-switched protocols for a voice call and the packet-switched core network that utilizes packet-switched protocols to switch the voice call.

主权项

1. A method in a communications system of charging for a voice call on a mobile device, the method comprising:
detecting, at a Session Initiation Protocol (SIP) voice control network, packets related to signaling for a voice call on a mobile device that is associated with a subscriber of a mobile service provider,
wherein the detected packets indicate information that forms a basis for the mobile service provider to charge the subscriber for the voice call,wherein, during the voice call, the mobile device uses circuit-switched protocols to send and receive voice data and signaling for the call over an air interface to the communication system; using the detected packets to extract information that forms a basis for the mobile service provider to charge the subscriber for the voice call; and, generating a charging data record for the voice call from the extracted information.