SIGNALLING METHOD FOR DIRECT COMMUNICATION BETWEEN TERMINALS

• US 20120188981A1
• Filed: 12/23/2011
• Published: 07/26/2012
• Est. Priority Date: 12/24/2010
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Chang, Sung Cheol, Yun, Mi-Young, Kim, Won-Ik, Kim, Sung Kyung, Kim, Eunkyung, Lee, Hyun, Yoon, Chul Sik, Lim, Kwang Jae, Kim, Seokki
• Application Number:
  US13/336,920
• Publication Number:
  US 20120188981A1
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
• CPC Class Codes: H04W 92/18 between terminal devices

Abstract

A signaling method of a first terminal for direct communication between terminals includes transmitting a link establishment request message for establishing a direct communication link including flow information to a second terminal, receiving a link establishment response message for establishing a direct communication link including flow information from the second terminal, and establishing a direct communication link between the first terminal and the second terminal.

Claims

1. A signaling method of a first terminal for direct communication between terminals, the method comprising:

transmitting a link establishment request message for establishing a direct communication link including flow information to a second terminal;

receiving a link establishment response message for establishing a direct communication link including flow information from the second terminal; and

establishing a direct communication link between the first terminal and the second terminal.

2. The method of claim 1, further comprising,

when a token is intended to be transferred to the second terminal, transmitting a token handover message instructing about transferring a token to the second terminal.

3. The method of claim 1, further comprising:

receiving a token request message requesting a transfer of the token from the second terminal; and

transmitting a token handover message instructing about transferring the token to the second terminal.

4. A signaling method of a first terminal for direct communication between terminals, the method comprising:

transmitting a first command message for establishing a direct communication link including flow information to a plurality of second terminals; and

establishing a direct communication link between the first terminal and the plurality of second terminals.

5. The method of claim 4, further comprising,

when flow management between the first terminal and the plurality of second terminals is required, transmitting one of a service addition command message instructing about configuring a flow, a service change command message instructing about changing a flow, and a service release command message instructing about releasing a flow to the plurality of second terminals.

6. The method of claim 4, further comprising,

when the link between the first terminal and the plurality of second terminals is required to be released, transmitting a link release command message instructing about releasing the direct communication link to the plurality of second terminals.

7. The method of claim 4, further comprising:

when a channel measurement between the first terminal and the plurality of second terminals is required, dedicatedly transmitting a measurement command message instructing about a channel measurement to the plurality of second terminals; and

receiving measurement report messages reporting a channel measurement result from the plurality of second terminals.

8. The method of claim 4, further comprising:

receiving a change request message requesting changing of a resource from at least one of the plurality of second terminals; and

multicasting a change command message instructing about changing a resource to the plurality of second terminals.

9. The method of claim 4, further comprising:

multicasting a token advertisement message announcing that a token is to be transferred to the plurality of second terminals;

receiving a token request message requesting to receive the token from at least one of the plurality of second terminals; and

multicasting a token handover message including information regarding a terminal to which the token is to be transferred to the plurality of second terminals.

10. A signaling method of a first terminal for direct communication between terminals, the method comprising:

transmitting a first link establishment request message for establishing a direct communication link to a second terminal through an RTS (request to send) data region;

receiving a first link establishment response message for establishing a direct communication link from the second terminal through a CTS (clear to send) data region; and

establishing a direct communication link in a first direction with respect to the second terminal from the first terminal.

11. The method of claim 10, wherein the first link establishment response message includes direct communication resource information, and the direct communication resource information indicates whether or not a resource is a common direct communication resource commonly allocated to a cell or a cell-specific direct communication resource allocated to a cell individually.

12. The method of claim 10, further comprising:

when the direct communication link is intended to be released, transmitting a link release command message for releasing the direct communication link to the second terminal; and

releasing a direct communication link with respect to the first direction.

13. The method of claim 10, further comprising,

when a flow of the direct communication link is intended to be managed, transmitting one of a flow addition command message instructing about configuring a flow, a flow change command message instructing about changing a flow, and a flow release command message instructing about releasing a flow to the second terminal.

14. The method of claim 10, further comprising:

transmitting a measurement command message instructing about measuring a first channel transferring a packet for direct communication between terminals to the second terminal; and

receiving a measurement report message including a measurement value through a second channel transferring a control message for the first channel from the second terminal or receiving a code through a corresponding supplementary channel in order to report a radio state of the first channel from the second terminal.

15. The method of claim 14, wherein the measurement report message further comprises at least one of information regarding the first channel and direct communication resource information.

16. The method of claim 10, further comprising:

receiving a token request command message requesting a transfer of a token through the second channel transferring a control message for a first channel transferring a packet for direct communication between terminals from the second terminal;

when it is determined that the token is transferred to the second terminal, transmitting a token handover message instructing about transferring the token to the second terminal; and

receiving data in a second direction with respect to the first terminal from the second terminal.

17. The method of claim 10, further comprising:

receiving a second link establishment request message from the second terminal through an RTS data region;

transmitting a second link establishment response message to the second terminal through a CTS data region; and

establishing a direct communication link in the second direction with respect to the first terminal from the second terminal.

18. The method of claim 17, further comprising:

transferring a first link release command message for releasing a direct communication link to the second terminal;

receiving a second link release command message from the second terminal; and

releasing the links in the first direction and the second direction.

19. A signaling method of a first terminal for direct communication between terminals, the method comprising:

multicasting a link establishment command message for establishing a direct communication link to a plurality of second terminals through an RTS (request to send) data region;

receiving CTS (clear to send) from the plurality of second terminals; and

establishing a direct communication link between the first terminal and the plurality of second terminals.

20. The method of claim 19, further comprising:

receiving a token request message requesting a token from one of the plurality of terminals;

when a token request is accepted, transmitting a token response message as a response to the token request to the one terminal; and

transmitting a token handover message informing about the transfer of the token to the plurality of second terminals.

21. The method of claim 20, wherein the token request message and the token response message are transmitted through a resource in which the first terminal does not transmit a packet.