| 主权项 |
1. A method for routing an IP Multimedia Services (IMS) service request message, the method comprising:
receiving, at a proxy server of a visited network, an initial message from a roaming user agent, the initial message being a geo-local service request message that is meaningful within the visited network; generating, at the proxy server, a modified message based on the initial message, the modified message being a session initiation protocol (SIP) message; forwarding the modified message from the proxy server to a home network of the roaming user agent; receiving, at the proxy server, a subsequent message from the home network of the roaming user agent, the subsequent message being a SIP message and including information for resolving a destination address corresponding to the geo-local service request message; and routing an IMS message related to the initial message to an IMS entity of the visited network based on the subsequent message, the modified message including:
information apart from information included in the initial message; and information to enable the home network of the user agent to route the subsequent message to the visited network. |
