Connecting a circuit-switched wireless access network to an IP multimedia subsystem

摘要

A network device performs a delayed registration in connection with phone call setup, if the network device does not know a phone number of a user in question at the time of updating the location updating. In addition, the network device performs user authentication and creates and maintains an encrypted and secure network connection between the network device and an IP multimedia subsystem by using data security mechanisms of a terminal of the IP multimedia subsystem and the authentication and data security parameters of the terminal received from the IP multimedia subsystem.

主权项

1. A method comprising:
connecting a terminal in an IP multimedia subsystem by sending a registration request to the IP multimedia subsystem, said request identifying the terminal by an SIP end point associated with a multi-radio protocol gateway instead of a telephone number; setting a private user identity for the terminal; setting a home network registrar domain name for the terminal; establishing a secure connection between the terminal and the IP multimedia subsystem; setting, with an SIP gateway function stored on the multi-radio protocol gateway, a private user identity for the terminal; setting, with an SIP gateway function stored on the multi-radio protocol gateway, a home network registrar domain name for the terminal, wherein the home network registrar domain name comprises either the domain name of the multi-radio protocol gateway or a numeric IP address for the multi-radio protocol gateway; authenticating the terminal in the IP multimedia subsystem; sending a location updating request corresponding to the new registration request to the home network registrar; performing a domain name service update in connection with the registering of the terminal in the IP multimedia subsystem.