Method for detecting calls and corresponding units

• US 20100220718A1
• Filed: 04/30/2010
• Published: 09/02/2010
• Est. Priority Date: 05/07/2002
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Hoffmann, Klaus
• Application Number:
  US12/770,848
• Publication Number:
  US 20100220718A1
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 63/304 intercepting circuit switched data communications lawful interception of wireless network communications H04W12/02
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1079 of unsolicited session attempts, e.g. SPIT
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• 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: H04Q 3/0025 Provisions for signalling

Abstract

A method for detecting calls is disclosed. A call request initiated by a calling terminal device is received by an access unit of a called terminal device of a data packet transmission network. An invite message is sent from the access unit to the called terminal device. A 200-OK message from the called terminal device is received by the access device. In the event of a detection request, a detection message is received by the access unit in order to initiate a detection of the calling terminal device. Additionally, a telephone terminal device includes a controller, which responds with a 200-OK to an invite message, the terminal device sends a detection message to the access unit in order to initiate a detection of a calling terminal device. An access unit which automatically stores an identifier of a calling terminal device is also disclosed.

Claims

1. A method for detecting calls, comprising:

receiving a call request, which is initiated by a calling terminal device, by an access unit of a called terminal device of a data packet transmission network;

sending an invite message, in accordance with the session initiation protocol, from the access unit to the called terminal device, the sending in response to receiving the call request;

receiving a first 200-OK message, in accordance to the session initiation protocol, by the access device, the first 200-OK message sent from the called terminal device in response to the invite message; and

in the event of a detection request, receiving a detection message by the access unit in order to initiate a detection of the calling terminal device, the detection message sent by the called terminal.

2. The method according to claim 1, further comprising:

performing the detection of the calling terminal is done in the access unit.

3. The method according to claim 1, further comprising:

sending a second 200-OK message, in accordance to the session initiation protocol, from the access device in the direction of the calling terminal device.

4. The method according to claim 1, wherein

an identifier of the calling terminal device is stored in a memory, the memory resides in the access unit or the access unit initiates the storing of memory outside the access unit.

5. The method according to claim 4, wherein

the identifier is a subscriber number of the calling terminal device is stored in the memory based on the detection message.

6. The method according to claim 1, wherein

the calling terminal device is a terminal device of a circuit-switched data transmission network.

7. The method according to claim 1, wherein

the access unit checks the access authorization of the calling terminal device for the data packet transmission network.

8. The method according to claim 4, wherein

at least one data selected from the group consisting of identifier of the called terminal device, date, and time-of-day is stored in addition to the identifier of the calling terminal device.

9. A telephone terminal device for a data packet transmission network, comprising:

a controller, which responds to a session-initiation-protocol invite message initiated via a call from a calling terminal device, the response being a session-initiation-protocol 200-OK message, which is sent to an access unit, wherein

in the event of a detection request, the terminal device sends a detection message to the access unit in order to initiate a detection of the calling terminal device.

10. An access unit for a data packet transmission network, comprising:

a control unit, which automatically stores an identifier of a terminal device calling a called terminal device.

11. The access unit according to claim 10, wherein the identifier is automatically stored after the reception of a detection message.