Method and apparatus for location based intercept in a communications system

• US 6,141,548 A
• Filed: 02/02/1998
• Issued: 10/31/2000
• Est. Priority Date: 02/02/1998
• Status: Expired due to Term

• Current Assignee: General Dynamics C4 Systems Incorporated (General Dynamics Corporation)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Blanchard, Scott David, Vanden Heuvel, Dean Paul, Patel, Pramodkumar
• Primary Examiner(s): MAUNG, NAY AUNG
• Application Number:
  US09/016,942
• Time in Patent Office: 1,002 Days
• Field of Search: 455/427, 455/428, 455/429, 455/456, 455/457, 455/432, 455/433, 455/436, 455/458, 455/445, 455/12.1, 342/372, 342/387, 342/457, 342/458
• US Class Current: 455/428
• 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: H04L 63/304 intercepting circuit switched data communications lawful interception of wireless network communications H04W12/02
• CPC Class Codes: H04M 3/2281 Call monitoring, e.g. for law enforcement purposes; Call tracing; Detection or prevention of malicious calls
• CPC Class Codes: H04W 12/80 Arrangements enabling lawful interception [LI]
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/029 Location-based management or tracking services

Abstract

A method and apparatus for providing location-based intercept in a system includes an intercept monitoring unit (210) for dynamically modifying an intercept target list (245) in a communications switch (240). The intercept monitoring unit (210) determines, as a function of user location, whether the user'"'"'s call should be intercepted. If so, either an updated entry is made to the intercept target list (245), or an entire updated copy of the intercept target list (237) is downloaded to the communications switch (240).

Claims

1. A method of handling a call request in a communications system, said method comprising the steps of:

receiving said call request for a call, said call having a party associated therewith;

determining a location area of the party;

looking up said party'"'"'s location area in a list of locations to be monitored; and

if the party'"'"'s location is in a list of locations to be monitored;

updating a target intercept list in a communications switch; and

modifying said target intercept list to include said party'"'"'s user ID to monitor the party'"'"'s call.

2. The method of claim 1 further comprising the step of delaying the routing of said call.

3. The method of claim 2 wherein the routing of said call is delayed for a fixed period of time.

4. The method of claim 2 wherein the routing of said call is delayed until said step of updating said target intercept list is complete.

5. The method of claim 1 wherein said party is a calling party.

6. The method of claim 1 wherein said party is a called party.

7. The method of claim 1 wherein said step of determining a location area comprises querying information included in said call request.

8. The method of claim 1 wherein said step of updating said target intercept list comprises the steps of:

maintaining a copy of said target intercept list;

modifying said copy of said target intercept list; and

sending said copy of said target intercept list to said communications switch.

9. The method of claim 1 wherein said step of updating said target intercept list comprises the steps of:

generating a target intercept list record for said party; and

sending said target intercept list record to said communications switch.

10. An apparatus for location-based intercept of communications, said apparatus comprising:

means for communicating with a communications network;

means for determining a location area of a caller;

means for looking up the caller'"'"'s location area in a list of locations to be monitored;

means for generating intercept information;

if the caller'"'"'s location area is in the list of locations to be monitored;

means for sending said intercept information to a communication switch;

means for updating a target intercept list to monitor the caller'"'"'s call, said means for updating coupled to said means for generating intercept information and operating in response to said means for generating intercept information; and

modifying the target intercept list to include the caller'"'"'s user ID.

11. The apparatus of claim 10 wherein said means for communicating with a communications network comprises a network interface input for accepting call requests from said communications network.

12. The apparatus of claim 11 wherein said means for communicating with a communications network further comprises a network interface output for notifying said communications network when to complete a call request.

13. The apparatus of claim 10 wherein said means for determining the location area of a caller comprises a controller capable of querying a call request received by said apparatus.

14. The apparatus of claim 10 wherein said means for generating intercept information comprises:

a database interface for accessing a location target list database; and

a controller for querying said location target list database, and for generating said intercept information.

15. The apparatus of claim 10 wherein said means for generating intercept information comprises:

data storage means for maintaining a copy of an intercept list; and

a controller for modifying entries in said copy of said intercept list, to produce said intercept information.