Patent ID: 8036664
Filing Date: 2011-10-11
Classification: H04W

Abstract:
1. A method of determining that a user equipment (UE) has roved out of a wireless first communication system comprising a user deployed access point that operates using licensed wireless frequencies covering a short-range distance and a network controller communicatively coupling the access point to a core network of a second communication system comprising a licensed radio access network, the method comprising: sending, from the access point to the UE, a system information broadcast that indicates an interval for the UE to send a periodic message directed towards the core network while the UE is in an idle mode, wherein the UE is in the idle mode when the UE is not engaged in a voice or data communication, wherein the access point is for intercepting messages sent by the UE that are directed towards the core network; at said access point, determining that the UE which had previously selected said access point for licensed coverage is no longer camped on said access point by determining that the access point has failed to intercept a pre-determined number of location update messages from the UE; and sending a deregister message from said access point to the network controller over a connection between the access point and the network controller, said deregister message for causing the network controller to deregister said UE from the wireless first communication system by removing a context and other resources associated with the UE, wherein said deregister message is generated at said access point.