Method, network unit and system for providing subscriber information of a group call to an interception unit

• US 20090088139A1
• Filed: 04/18/2006
• Published: 04/02/2009
• Est. Priority Date: 04/18/2005
• Status: Abandoned Application

• Current Assignee: Nokia Siemens Networks GmbH & Company KG (Nokia Corporation)
• Original Assignee: Nokia Siemens Networks GmbH & Company KG (Nokia Corporation)
• Inventors: Gruenbauer, Johannes, Deubler, Martin, Maras, Demet
• Application Number:
  US11/918,829
• Publication Number:
  US 20090088139A1
• Time in Patent Office: Days
• US Class Current: 455/414.300
• 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 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/4061 Push-to services, e.g. push-to-talk or push-to-video
• CPC Class Codes: H04M 2203/2044 Group features, e.g. closed user group
• 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: H04M 3/42034 Calling party identification service
• CPC Class Codes: H04Q 2213/1324 Conference call
• CPC Class Codes: H04Q 2213/13288 Closed user groups, CUG
• CPC Class Codes: H04Q 2213/13372 Intercepting operator
• CPC Class Codes: H04W 12/80 Arrangements enabling lawful interception [LI]
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems

Abstract

To provide at least one piece of subscriber information regarding at least one group call to an interception unit from a network unit by way of a communication network, the network unit receives at least one piece of subscriber information regarding at least one group call from a further network unit following a request for this at least one piece of subscriber information. The network unit forwards the at least one piece of subscriber information regarding the at least one group call in at least one IRI ticket to the interception unit.

Claims

1. A method for providing at least one piece of subscriber information regarding at least one group call to an interception unit (LEA) from a network unit by way of a communication network, comprising:

receiving at the network unit at least one piece of subscriber information regarding at least one group call from a further network unit following a request for this at least one piece of subscriber information; and

forwarding by the network unit the at least one piece of subscriber information regarding the at least one group call in at least one IRI ticket to the interception unit.

2. The method as claimed in claim 1,

wherein the request contains a group identity of the group call for which at least one piece of subscriber information is to be interrogated.

3. The method as claimed in claim 1, wherein

at least one of the SIP protocol and the H.323 protocol is used for signaling purposes for the request.

4. The method as claimed in claim 1, further comprising

sending by the network unit the request by way of at least one of a PoC unit and a presence server to the further network unit.

5. The method as claimed in claim 1, wherein

the network unit is at least one of a Call State Control Function, a switching unit and a Serving GPRS Support Node.

6. The method as claimed in claim 1, wherein

the network unit has an IRI interface to the interception unit.

7. The method as claimed in claim 1, wherein

the further network unit is at least one of a Group and List Management Server, a conference management unit, a group list management unit for an “

instant message”

service and a presence server.

8. The method as claimed in claim 1, further comprising

using at least one of a subscriber identification number, a SIP URI and a TEL URI as subscriber information.

9. The method as claimed in claim 1, wherein

the subscriber information is a subscriber list for the group call.

10. The method as claimed in claim 9, wherein

the subscriber list contains at least one of a subscriber identity, a SIP URI and a TEL URI.

11. The method as claimed in claim 1, wherein

the communication network includes at least one of a cellular mobile radio network, a packet-switched communication network, a fixed network and an IP network.

12. A network unit for providing at least one piece of subscriber information regarding at least one group call to an interception unit, comprising:

a receive unit and a send unit for carrying out a communication, and

a processing unit for receiving from a further network unit at least one piece of subscriber information regarding the at least one group call following a request for this at least one piece of subscriber information and for forwarding the received at least one piece of subscriber information regarding the at least one group call in at least one IRI ticket to the interception unit.

13. A system for providing at least one piece of subscriber information regarding at least one group call to an interception unit from a network unit by way of a communication network, comprising:

a network unit for receiving from a further network unit at least one piece of subscriber information regarding the at least one group call following a request for this at least one piece of subscriber information and for forwarding the received at least one piece of subscriber information regarding the at least one group call in at least one IRI ticket to the interception unit,

a further network unit for providing and sending the requested subscriber information regarding the at least one group call, and

an interception unit for evaluating the at least one piece of subscriber information in the IRI ticket.