Patent ID: 7444131
Filing Date: 2008-10-28
Classification: H04L,H04W

Abstract:
1. A method of forcing the path of call terminations for a roaming surveillance target mobile through a predetermined Target Intercept Access Point (TIAP) for surveillance in a wireless telecommunications network, the method comprising: provisioning the target mobile's Home Location Register (HLR) with a TIAP identifier; determining that a Location Request Query (LRQ) sent by a Location Requesting MSC (LRMSC) to the target mobile's HLR does not come from the TIAP; determining that the target mobile is not registered at the TIAP; allocating a Temporary Roaming Routing Number (TRRN) at the TIAP and noting it as being used for surveillance of the target; establishing a call leg between the LRMSC and the TIAP; establishing a surveillance configuration for surveilling the call termination; sending a LRQ from the TIAP to the target mobile's HLR; determining that the LRQ sent from the TIAP is for a surveillance target mobile; determining that the LRQ sent from the TIAP is coming from an MSC that is a non-serving TIAP for the target; and establishing a call leg between the TIAP and the MSC serving the target mobile.