Lawful interception of non-local subscribers

• US 8,223,927 B2
• Filed: 02/14/2008
• Issued: 07/17/2012
• Est. Priority Date: 02/14/2008
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Di Serio, Luca, De Santis, Raffaele, Cicco, Roberto, Maione, Biagio, Di Donato, Rita
• Primary Examiner(s): Tieu, Binh
• Application Number:
  US12/867,815
• Publication Number:
  US 20100316195A1
• Time in Patent Office: 1,615 Days
• Field of Search: 379/1.01, 379/7, 379/32.01, 379/32.05, 379/35, 455/414.1, 455/417, 455/432.1, 455/432.3, 455/455
• US Class Current: 379/32.01
• CPC Class Codes: H04L 63/306 intercepting packet switched data communications, e.g. Web, Internet or IMS communications
• CPC Class Codes: H04M 2207/20 hybrid systems
• CPC Class Codes: H04M 3/2281 Call monitoring, e.g. for law enforcement purposes; Call tracing; Detection or prevention of malicious calls

Abstract

The present application relates to monitoring non-local originating calls in a telecommunication system having a local network part and a non-local network part. A monitoring centre is attached to an Intercept Access Point in the local network part. A monitoring request comprising an external target identification is received from the monitoring centre to the Intercept Access point. A call is set-up of from an originating subscriber in the non-local network part, towards the local network part. An Initial Address Message comprising the originating subscriber'"'"'s identity is received to the Intercept Access point from the non-local network part. A match is found between the Initial Address Message and the received target identification. Monitoring information related to the matched target is transferred from the Intercept Access Point to the monitoring centre.

Claims

1. Method to monitor non-local originating calls in a telecommunication system comprising a local network part and a non-local network part, wherein a monitoring centre is attached to an Intercept Access Point in the local network part, the method comprising the following steps:

receiving from the monitoring centre to the Intercept Access point, a monitoring request comprising an external target identification;

setting-up a call from a subscriber in the non-local network part, towards the local network part;

receiving to the Intercept Access Point a subscriber identity from the non-local network part;

finding of a match between the subscriber identity and the received target identification;

transferring monitoring information related to the matched target, from the Intercept Access Point to the monitoring centre.

2. The method to monitor non-local originating calls in a telecommunication system according to claim 1 wherein the local network part is a call terminating part and the non-local part is a call originating part.

3. The method to monitor non-local originating calls in a telecommunication system according to claim 1 wherein the local network part is a first telecommunication network and the non-local network part is a second telecommunication network.

4. The method to monitor non-local originating calls in a telecommunication system according to claim 1 wherein the local network part is a first node in a telecommunication network and the non-local network part is a second node in the telecommunication network.

5. The method to monitor non-local originating calls in a telecommunication system according to claim 1, wherein the target identification specifies an external calling party number.

6. The method to monitor non-local originating calls in a telecommunication system according to claim 1, wherein the target identification specifies an incomplete calling party number corresponding to an area identification.

7. An arrangement to monitor non-local originating calls in a telecommunication system that comprises a local network part and a non-local network part, wherein a monitoring centre is attached to an Intercept Access Point in the local network part, comprising:

means to receive from the monitoring centre to the Intercept Access point, a monitoring request comprising an external target identification;

means to set-up a call from a subscriber in the non-local network part, towards the local network part;

means to receive from the non-local network part to the Intercept Access Point, a subscriber identity;

means to detect a match between the subscriber identity and the received target identification;

means to transfer monitoring information related to the matched target, from the Intercept Access Point to the monitoring centre.

8. The arrangement to monitor non-local originating calls in a telecommunication system according to claim 7 wherein the local network part is a call terminating part and the non-local part is a call originating part.

9. The arrangement to monitor non-local originating calls in a telecommunication system according to claim 8 wherein the local network part is a first telecommunication network and the non-local network part is a second telecommunication network.

10. The arrangement to monitor non-local originating calls in a telecommunication system according to claim 8 wherein the local network part is a first node in a telecommunication network and the non-local network part is a second node in the telecommunication network.

11. The arrangement to monitor non-local originating calls in a telecommunication system according to claim 7, wherein the target identification specifies an external calling party number.

12. The arrangement to monitor non-local originating calls in a telecommunication system according to claim 7, wherein the target identification specifies an incomplete calling party number corresponding to an area identification.

13. A node in a local network part for monitoring of non-local originating calls in a telecommunication system that comprises the local network part and a non-local network part, comprising:

means in the node to receive a monitoring request comprising an external target identification;

means in the node to receive from the non-local network part a subscriber identity;

means in the node to detect a match between the subscriber identity and the received target identification;

means in the node to return in response to the request, monitoring information related to the matched target.

14. A node in a local network part for monitoring of non-local originating calls in a telecommunication system that comprises the local network part and a non-local network part, comprising:

an ID-receiver in the node aimed to receive a monitoring request comprising an external target identification;

an IAM-receiver in the node aimed to receive a subscriber identity from the non-local network part;

A comparison device in the node aimed to detect a match between the subscriber identity and the received target identification;

A sending device in the node aimed to return in response to the request, monitoring information related to the matched target.

15. A computer-readable medium having stored thereon a plurality of instructions, the plurality of instructions including instructions which, when executed by a processor, cause the processor to perform the steps of a method to monitor non-local originating calls in a telecommunication system that comprises a local network part and a non-local network part, wherein a monitoring centre is attached to an Intercept Access Point in the local network part, the steps comprising:

receiving from the monitoring centre to the Intercept Access point, a monitoring request comprising an external target identification;

setting up a call from an originating subscriber in the non-local network part, to the local network part;

receiving from the non-local network part to the Intercept Access point, a subscriber identity;

detecting a match between the subscriber identity and the received target identification;

transferring monitoring information related to the matched target, from the Intercept Access Point to the monitoring centre.