Patent ID: 7899441
Filing Date: 2011-03-01
Classification: H04L,H04W

Abstract:
1. A method for resolving and accessing a selected service in a cellular Wireless Local Area Network (WLAN) interworking network, the method comprising the steps of: a. configuring a service resolving unit in the cellular network for initial access processing; receiving, by a service authentication authorization unit in the cellular network, a service authentication and authorization request from the service resolving unit; wherein the authentication and authorization request contains subscription information extracted by the service resolving unit from a first service establishing request sent by a user terminal in the WLAN; b. performing, by the service authentication authorization unit, service authentication and authorization to the user terminal according to the subscription information; c. determining, by the service authentication authorization unit, whether the authentication and authorization is successful, if the authentication and authorization is successful, returning, by the service authentication authorization unit, via the service resolving unit, an address of a destination device authorized to process the selected service to the user terminal, the address is used to establish a service connection between the user terminal and the destination device; if the authentication and authorization fails, returning, by the service authentication authorization unit, failure information to the user terminal via the service resolving unit; while returning the address of the destination device authorized to process the selected service to the user terminal, the service authentication authorization unit sending a service authorization notification that carries information of the user terminal to the destination device; the process of establishing a service connection between the user terminal and the destination device in step c comprises: the user terminal sending a second service establishing request to the destination device; after receiving the second service establishing request, the destination device performing authentication and authorization to the user terminal according to the information in the service authorization notification, if the authentication is successful, the destination device establishing the service connection with the user terminal; wherein the determining whether the authentication and authorization is successful in step c comprises: judging determining, by the service authentication authorization unit, whether a route between the current authorized destination device and a WLAN access gateway device serving the WLAN user terminal that initiates the request is opened to the user terminal, if the route is opened, the service authentication and authorization is successful; otherwise, sending, by the service authentication authorization unit, an open route notification to the WLAN access gateway device to instruct the WLAN access gateway device to open the route to the authorized destination device; then judging whether the route is successfully opened, if yes, the service authentication and authorization is successful; otherwise, the service authentication and authorization fails.