Method and apparatus for identifying and tracking target subscribers in a universal mobile telephone system

• US 20070010240A1
• Filed: 07/06/2005
• Published: 01/11/2007
• Est. Priority Date: 07/06/2005
• Status: Active Grant

• Current Assignee: RPX Corporation
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Steiger, Siegfried, Gabler, Karl-Heinz
• Granted Patent: US 7,471,944 B2
• Time in Patent Office: Days
• US Class Current: 455/423
• CPC Class Codes: H04L 63/30 for supporting lawful interception, monitoring or retaining of communications or communication related information circuit switched telephony call monitoring H04M3/2281
• CPC Class Codes: H04W 12/108 Source integrity
• CPC Class Codes: H04W 60/04 using triggered events
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A method is provided for tracking a mobile device in a wireless communications system. The method comprises establishing communications between the mobile device and a masquerading base station with the mobile device operating in a first mode, such as UMTS. The mobile device is urged to operate in a second mode such as GMS, and the mobile device is then tracked in the second mode of operation.

Claims

1. A method for tracking a mobile device in a wireless communications system, comprising:

establishing communications between the mobile device and a masquerading base station operating in a first mode of operation;

urging the mobile device to operate in a second mode of operation; and

tracking the mobile device in the second mode of operation.

2. A method, as set forth in claim 1, wherein establishing communications between the mobile device and a masquerading base station operating in a first mode of operation further comprises establishing communications between the mobile device and the masquerading base station operating in a Universal Mobile Telephone System mode of operation, and urging the mobile device to operate in the second mode of operation further comprises urging the mobile device to operate in the Global System for Mobile communications mode of operation.

3. A method, as set forth in claim 2, wherein tracking the mobile device in the second mode of operation further comprises tracking the mobile device in the Global System for Mobile communications mode of operation.

4. A method, as set forth in claim 1, further comprising the mobile device communicating with a first base station in the first mode of operation, and compromising the quality of the communications between the first base station and the mobile device.

5. A method, as set forth in claim 1, further comprising the mobile device communicating with a first base station in the first mode of operation, and urging the mobile device to re-select the masquerading base station.

6. A method, as set forth in claim 5, wherein urging the mobile device to re-select the masquerading base station further comprises compromising the quality of the communications between the first base station and the mobile device.

7. A method, as set forth in claim 6, wherein compromising the quality of the communications between the first base station and the mobile device further comprises transmitting signals that interfere with communications between the first base station and the mobile device.

8. A method, as set forth in claim 1, wherein urging the mobile device to operate in the second mode of operation further comprises broadcasting system information from the masquerading base station indicating that a base station using the second mode of operation is preferred when re-selecting.

9. A method, as set forth in claim 1, further comprises requesting a permanent user identity from the mobile device.

10. A method, as set forth in claim 9, further comprising transferring the mobile device into an transient state to avoid an integrity protection mechanisms.

11. A method, as set forth in claim 1, further comprising compromising the quality of the communications between the masquerading base station and the mobile device to force the mobile device to operate in the second mode of operation.

12. A method, as set forth in claim 1, further comprising manipulating system parameters controlling a cell re-selection process in the mobile device to force the mobile device to operate in the second mode of operation.

13. A method, as set forth in claim 1, further comprising using forced inter-system re-direction after paging to force the mobile device to operate in the second mode of operation.

14. A method, as set forth in claim 1, wherein tracking the mobile device in the second mode of operation further comprises using a Global System for Mobile communications tracking system.