Patent ID: 8280374

Claim:
A method suitable for Policy Decision Point discovery in a roaming or handover scenario in an IP network, the method comprising the steps of: receiving and storing at an authentication function a local IP address of a user equipment, discovering an address of a Home Agent, sending, from the authentication function, the address of the Home Agent to the user equipment, sending from the authentication function the local IP address of the user equipment to the Home Agent so that the Home Agent can assign a home IP address to the user equipment and associate an anchor Policy Decision Point to the user equipment and so that the Home Agent can send the local IP address of the user equipment to the anchor Policy Decision Point where said anchor Policy Decision Point has access to both Policy Rules and a subscriber database comprising policy information related to the user equipment; receiving at the authentication function an address of a serving Policy Decision Point associated to the user equipment, storing, at the authentication function, the address of the serving policy decision point together with the local address of the user equipment, sending from the authentication function the address of the serving policy Decision Point to the Home Agent so that the Home Agent can forward the address of the serving policy decision point to the anchor Policy Decision Point and so that the anchor Policy Decision Point can contact the serving policy decision point by using said address of the serving Policy Decision Point.