Patent ID: 8761007
Filing Date: 2014-06-24
Classification: H04L,H04W

Abstract:
1. A method for preventing a user equipment from forming a routing loop in a network, the user equipment having used a host-based mobility protocol to connect to a plurality of packet data network gateways in the network, the method comprising: maintaining a list of one or more home addresses associated with the user equipment, each home address having been previously associated with the user equipment by a corresponding packet data network gateway, wherein the list of the one or more home address is maintained by an authentication, authorization and accounting (AAA) server within the network; receiving, by the packet data network gateway from the AAA server, the list of the one or more home addresses associated with the user equipment; in response to a request to update a care-of address in a binding cache entry of a packet data network gateway in the network, comparing an address to be used to update the care-of address with the one or more home addresses in the list, wherein the comparing is performed by the packet data network gateway; and if the address to be used to update the care-of address matches a home address in the list, then rejecting the request to update to prevent formation of a routing loop in the network between (i) the packet data network gateway and (ii) another packet data network gateway of the plurality of packet data network gateways.