Methods and systems for providing mobile subscriber...

Details Methods and systems for providing mobile subscriber... Methods and systems for providing mobile subscriber...

2005-05-31

2005-05-31

Cumming, William D. (Department: 2683)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C342S457000, C600S504000

Reexamination Certificate

active

06901262

ABSTRACT:
Methods and systems for providing mobile subscriber surveillance identify certain call signaling messages as candidate messages for mobile subscriber surveillance. From the candidate messages, messages associated with mobile subscribers under surveillance are identified. Mobile subscriber location information is obtained for the messages associated with the mobile subscribers under surveillance. The location information is forwarded to a surveillance center, such as a state or federal law enforcement or security agency. The original call signaling messages are forwarded to their intended destinations so that surveillance is performed transparently to the mobile subscriber under surveillance.

REFERENCES:
patent: 5228449 (1993-07-01), Christ et al.
patent: 6236365 (2001-05-01), LeBlanc et al.
patent: 2004/0203849 (2004-10-01), Allison et al.
ETSI, “Digital Cellular Telecommunications System (Phase2+); Location Services (LCS); (Functional Description)—Stage 2,” Global System for Mobile Communications, p. 1-109, (2001).
ETSI, “Digital Cellular Telecommunications System (Phase2+); Location Services (LCS); Mobile Station (MS)—Serving Mobile Location Centre (SMLC) Radio Resource LCS Protocol (RRLP),” Global System for Mobile Communications, p. 1-52, (2000).

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