DIRECT LINK TEARDOWN PROCEDURE IN TUNNELED DIRECT LINK SETUP (TDLS) WIRELESS NETWORK AND STATION SUPPORTING THE SAME

• US 20090022125A1
• Filed: 07/10/2008
• Published: 01/22/2009
• Est. Priority Date: 07/11/2007
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seok, Yong Ho
• Application Number:
  US12/171,182
• Publication Number:
  US 20090022125A1
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04W 76/34 Selective release of ongoing connections

Abstract

Provided are a direct link teardown procedure in a TDLS (Tunneled Direct Link Setup) wireless network and a station supporting the direct link teardown procedure. In the direct link teardown procedure, an initiating station of the teardown procedure transmits a TDLS teardown request message to the peer station of the direct link. The initiating station receives a TDLS teardown response message in response to the TDLS teardown request message from the peer station. Then, the initiating station disables its direct Rx path and destroys the security parameters relevant to the direct link upon receipt of the TDLS teardown response message.

Claims

1. A procedure for tearing down a direct link in a Tunneled Direct Link Setup (TDLS) wireless network, the procedure comprising:

transmitting a TDLS teardown request message to the peer station of the direct link;

receiving a TDLS teardown response message in response to the TDLS teardown request message from the peer station; and

disabling its direct Rx path and destroying the security parameters relevant to the direct link upon receipt of the TDLS teardown response message.

2. The procedure according to claim 1,

wherein the procedure further comprises disabling its own Tx path after transmitting the TDLS teardown request message.

3. The procedure according to claim 1,

wherein the TDLS teardown request message is transmitted through an access point, and

wherein the TDLS teardown response message is received through the access point.

4. The procedure according to claim 1,

wherein the TDLS teardown request message comprises a link identifier element which identifies the direct link, a reason code element which indicates the reason that the TDLS teardown request frame was generated, and a dialog token element containing a unique value for identifying the exchange of the TDLS teardown request message and the TDLS teardown response message.

5. The procedure according to claim 1,

wherein the TDLS teardown response message comprises a link identifier element which identifies the direct link and a dialog token element which is copied from the TDLS teardown request message.

6. A procedure for tearing down a direct link in a Tunneled Direct Link Setup (TDLS) wireless network, the procedure comprising:

receiving a TDLS teardown request message from the peer station of the direct link;

disabling its direct Rx and Tx paths and destroying security parameters relevant to the direct link upon the receipt of the TDLS teardown request message; and

transmitting a TDLS teardown response message in response to the TDLS teardown request message to the peer station.

7. The procedure according to claim 6,

wherein the peer station disables its own direct Rx path and destroys the security parameters relevant to the direct link upon receipt of the TDLS teardown response message.

8. The procedure according to claim 6,

wherein the TDLS teardown request message is received through an access point, and

wherein the TDLS teardown response message is transmitted through the access point.

9. The procedure according to claim 6,

wherein the TDLS teardown request message comprises a link identifier element which identifies the direct link, a reason code element which indicates the reason that the TDLS teardown request frame was generated, and a dialog token element containing a unique value for identifying the exchange of the TDLS teardown request message and the TDLS teardown response message.

10. The procedure according to claim 6,

wherein the TDLS teardown response message comprises a link identifier element which identifies the direct link and a dialog token element which is copied from the TDLS teardown request message.

11. A procedure for tearing down a direct link in a Tunneled Direct Link Setup (TDLS) wireless network, the procedure comprising:

establishing a direct link with a peer station;

transmitting a TDLS teardown request message to the peer station; and

releasing the direct link in case of receiving a response message in response to the TDLS teardown request message from the peer station.

12. The procedure according to claim 11,

wherein the TDLS teardown request message is transmitted to the peer station through an access point.

13. The procedure according to claim 11,

wherein the TDLS teardown request message is encapsulated in data frames.

14. The procedure according to claim 11,

wherein the peer station releases the direct link in case of receiving the TDLS teardown request message.

15. A station for supporting a Tunneled Direct Link Setup (TDLS) in a wireless local access network, the station comprising:

a processor configured to generate and process frames; and

a transceiver operably connected to the processor and configured to transmit and receive the frames for the processor,

wherein the processor is configured to generate a TDLS teardown request message encapsulated in data frames and forward the generated TDLS teardown request message to the transceiver;

wherein the transceiver is configured to transmit the TDLS teardown request message to the peer station, to receive a TDLS teardown response message from the peer station in response to the TDLS teardown request message, and to forward the received TDLS teardown response message to the processor; and

wherein the processor is configured to disable its direct Rx path and to destroy the security parameters relevant to the direct link upon receipt of the TDLS teardown response message.