System and method for identifying the location of a wireless terminal

• US 5,740,538 A
• Filed: 01/05/1996
• Issued: 04/14/1998
• Est. Priority Date: 01/05/1996
• Status: Expired due to Term

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Joyce, Michael Julian, Ourmazd, Abbas, Ong, Ping-Wen, Warwick, Colin Alan
• Primary Examiner(s): Bost, Dwayne
• Assistant Examiner(s): TROST IV, WILLIAM GEORGE
• Application Number:
  US08/583,355
• Time in Patent Office: 830 Days
• Field of Search: 379/58, 379/59, 379/61, 379/63, 379/127, 379/142, 455/456, 455/457, 455/435, 455/422, 455/415
• US Class Current: 455/456.2
• CPC Class Codes: H04W 4/20 Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 8/245 from a network towards a terminal
• CPC Class Codes: H04W 92/10 between terminal device and access point, i.e. wireless air interface

Abstract

A system and method that identify the location of a wireless terminal. An illustrative embodiment of the present invention comprises a wireless communication system with a plurality of base stations. The system associates a location identification signal with each base station, such as an area code and an exchange of a telephone number in the geographic area of the base station. When a call is connected through a base station, the system modifies the caller-ID signal for the wireless terminal with the location identification signal of the base station. Thus, the system identifies the location of a wireless terminal.

Claims

1. A wireless communication system comprising:

a wireless switching center coupled to a public switched telephone network;

a plurality of base stations communicatively coupled to said wireless switching center; and

a location circuit that determines if a called number corresponds to a location service and if said called number corresponds to the location service, said location circuit modifies the caller-identification signal for a call from a wireless terminal with a signal that identifies the location of one of said base stations such that the modified caller-identification signal identifies the proximate location of the wireless terminal.

2. The system of claim 1, wherein said location circuit is disposed in said base station.

3. The system of claim 1, wherein said location circuit is disposed in said wireless switching center.

4. The system of claim 1, wherein said location circuit comprises a circuit that replaces at least a portion of the caller-identification signal with a three digit area code and a three digit exchange number corresponding to the location of the base station.

5. The system of claim 1, wherein said location circuit comprises a circuit that appends a location signal to said caller-identification signal.

6. A method for identifying the location of a wireless terminal, the method comprising:

receiving a dialed telephone number from a wireless terminal at a base station;

determining if a called number corresponds to a location service and if said called number corresponds to the location service, said location circuit modifying the caller-identification signal for a call from a wireless terminal with a signal that identifies the geographic location of the base station such that the modified caller-identification signal identifies the proximate location of the wireless terminal;

continuing the call with the modified caller-identification signal.

7. The method of claim 6, wherein said step of modifying the caller-identification signal comprises the step of appending a location signal to the caller identification signal.

8. The method of claim 6, wherein said step of modifying the caller-identification signal comprises the step of replacing the caller identification signal with a location identification signal.

9. The method of claim 6, wherein said step of modifying the caller-identification signal comprises the step of replacing at least a portion of the caller-identification signal with a three digit area code and a three digit exchange corresponding to the location of the base station.