Patent ID: 7298725

Claim:
A method for enhancing routing of an authentication, authorization, or accounting-related (AAA) message related to a roaming mobile terminal from a home service network to a local access network being accessed or otherwise serviced by the roaming mobile terminal, comprising: storing in the home service network a list of one or more intermediary service networks for use in routing the AAA message from the home service network towards a local access network associated with the mobile terminal; the home service network including the list with the AAA message; and using the one or more intermediary service networks on the list to convey the AAA message towards the local access network, wherein the AAA message is a first AAA message, and wherein when the home service network receives a second AAA message from the local access network routed through one or more selected intermediary service networks to the home service network, each selected intermediary service network or each of a subset of the selected intermediary service networks having added to the AAA message an associated intermediary service network identifier, the home service network receives the second AAA message and generates the list using the associated intermediary service network identifier included by each selected one or more intermediary networks.