06782264 is referenced by 211 patents and cites 16 patents.

In an overlay Wireless Location System, an Abis interface is monitored to obtain information used to locate GSM phones. Signaling links of the Abis interface are passively monitored to obtain certain information, such as control and traffic channel assignment, called number, and mobile identification, which is not available from the GSM air interface of the reverse channel. This approach also applies to IDEN and can be broadened to include CDMA systems where the GSM architecture has been used and the system includes a separated BTS to BSC interface.

Title
Monitoring of call information in a wireless location system
Application Number
9/909221
Publication Number
6782264 (B2)
Application Date
July 18, 2001
Publication Date
August 24, 2004
Inventor
Robert J Anderson
Norristown
PA, US
Agent
Woodcock Washburn
US
Assignee
TruePosition
PA, US
IPC
H04Q 7/20
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