Patent ID: 7554942

Claim:
A method of restricting geographical use of a service for a mobile terminal (MT) in a packet data network, the method comprising the steps of: receiving, at a packet data service node (PDSN) from an access node (AN), a registration request message for requesting packet data service, wherein the registration request includes a cell information; translating, at the PDSN, the cell information into a zone ID; storing, at the PDSN, the zone ID, wherein the zone ID is stored in a first table; sending, from the PDSN to an Authentication, Authorization, Accounting (AAA) server, an access request message for authenticating the MT; receiving, at the PDSN from the AAA server, an access accept message for authorizing the MT to receive packet data service, wherein the access accept message includes an allowance information; comparing, at the PDSN, the allowance information with the zone ID: if the allowance information is different from the zone ID in the first table: setting up, at the PDSN, a filter for the MT; and rejecting, at the PDSN, the packet data for the requested packet data service.