System and method for the early detection of cellular telephone

Details System and method for the early detection of cellular telephone System and method for the early detection of cellular telephone

1997-12-22

2000-12-12

Tsang, Fan

Telecommunications

Radiotelephone system

Security or fraud prevention

455433, H04Q 734

Patent

active

061610062

ABSTRACT:
A method and system for early piracy detection in a cellular telecommunications network is disclosed. When in idle mode, a network subscriber Mobile Station (MS) transmits a Current Location Identifier message (CLID) on a pseudo-random basis. The CLID, which contains MS identifying information, is picked up by the network and relayed to the Mobile Switching Center (MSC) covering the area in which the MS is currently located. When it receives the CLID, the MSC generates an MS-CLID message containing the CLID and the identifier of the nodes through which it has passed, including that of the MSC itself. The MS-CLID message is then sent to the system Home Location Register (HLR), which compares the MS identification and location information to that stored in its database. The system generates a piracy alarm when the comparison determines that another caller using the same identity is currently active or that a call being initiated is originating from a location distant to the last reported location of the legitimate MS, allowing the system operator to take action prior to the loss of inordinate amounts of air time.

REFERENCES:
patent: 5734977 (1998-03-01), Sanmugam
Patel, Sarvar, Location, Identity and Wireless Fraud Detection, IEEE 1997, pp. 515-521.

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