METHOD OF DEVICE-TO-DEVICE DISCOVERY AND APPARATUS THEREOF

• US 20140130137A1
• Filed: 11/05/2013
• Published: 05/08/2014
• Est. Priority Date: 11/05/2012
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: BAEK, Seung Kwon, AHN, Jae Young
• Granted Patent: US 9,532,224 B2
• Time in Patent Office: Days
• US Class Current: 726/4
• CPC Class Codes: H04W 12/08 Access security
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals

Abstract

Disclosed are a method of device-to-device discovery and an apparatus for the same. A method of device-to-device discovery performed in a discovery terminal may include receiving a discovery identifier of the discovery terminal from a device-to-device server; performing an authorization procedure on performing the restricted discovery of an application located in the discovery terminal with the device-to-device server; and obtaining terminal information of a discoverable terminal as a counterpart terminal with which performs the restricted discovery from the device-to-device server, when the authorization is completed. Thus, the device-to-device discovery may be performed efficiently.

Claims

1. A method of restricted discovery performed in a discovery terminal, the method comprising:

receiving a discovery identifier of the discovery terminal from a device-to-device server;

performing an authorization procedure on performing the restricted discovery of an application located in the discovery terminal with the device-to-device server; and

obtaining terminal information of a discoverable terminal as a counterpart terminal with which performs the restricted discovery from the device-to-device server, when the authorization is completed.

2. The method of claim 1, wherein the discovery identifier indicates that the discovery terminal supports the restricted discovery.

3. The method of claim 1, wherein the performing an authorization procedure includes transmitting an authorization request message requesting an authorization on performing the restricted discovery of the application located in the discovery terminal to the device-to-device server;

and receiving an authorization response message in response to the authorization request message from the device-to-device server.

4. The method of claim 3, wherein the authorization request message includes an identifier of the discovery terminal and an identifier of the application.

5. The method of claim 1, the obtaining terminal information includes transmitting a discoverable terminal information request message to the device-to-device server;

receiving the discoverable terminal information response message in response to the discoverable terminal information request message from the device-to-device server; and

updating a list of discoverable terminals based on the terminal information included in the received discoverable terminal information response message.

6. The method of claim 5, wherein the discoverable terminal information request message includes an identifier of a target terminal, an operation flag, and the application identifier.

7. The method of claim 6, wherein the operation flag indicates a request for approving of the restricted discovery or a request for cancelling approval of the restricted discovery.

8. The method of claim 5, wherein the discoverable terminal information response message includes an identifier of the discoverable terminal, and a response information on whether to approve the restricted discovery.

9. The method of claim 8, wherein the identifier of the discoverable terminal is added in the list of discoverable terminals, when the response information indicates that the restricted discovery is approved of.

10. A method of activating a restricted discovery performed in a discovery terminal, the method comprising:

transmitting a restricted discovery activation request message to a device-to-device server to activate the restricted discovery of the discoverable terminal;

receiving information on radio resources used for the restricted discovery through a base station interworking with the device-to-device server, when the restricted discovery of the discoverable terminal is activated;

receiving a restricted discovery activation response message in response to the restricted discovery activation request message from the device-to-device server; and

performing the restricted discovery with the discoverable terminal through radio resources indicated by the information on radio resources.

11. The method of claim 10, the restricted discovery activation request message includes a discovery type, a discovery state, an identifier of application in the discovery terminal, and an identifier of the discoverable terminal.

12. The method of claim 10, wherein the restricted discovery activation response message includes a discovery identifier of the discovery terminal and a discovery identifier of the discoverable terminal.

13. The method of claim 10, wherein the discovery terminal is transitioned to a restricted discovery activated state, when the restricted discovery activation response message is received.

14. The method of claim 10, the device-to-device server allocates radio resources used for the restricted discovery to the discoverable terminal, when the restricted discovery activation response message is received.

15. The method of claim 14, wherein the device-to-device server configures a discovery identifier of the discovery terminal and a discovery identifier of the discoverable terminal, when the allocation of radio resources is completed.

16. The method of claim 10, wherein a message between the discovery terminal and the device-to-device server is exchanged through a mobile management entity (MME).

17. A method of deactivating a restricted discovery service performed in a discovery terminal, the method comprising:

transmitting a restricted discovery deactivation request message to a device-to-device server to deactivate the restricted discovery of a discoverable terminal;

receiving information of releasing radio resources allocated for the restricted discovery from a base station interworking the device-to-device server, when the restricted discovery of the discoverable terminal is deactivated;

receiving a restricted discovery deactivation response message in response to the restricted discovery deactivation request message from the device-to-device server; and

transitioning to an idle state.

18. The method of claim 17, wherein the device-to-device server releases the radio resources allocated to the discoverable terminal for the restricted discovery, when the restricted deactivation request message is received.

19. The method of claim 18, wherein the device-to-device server releases a discovery identifier configured for the discoverable terminal, when the release of radio resources allocated to the discoverable terminal is completed.

20. The method of claim 17, wherein the device-to-device server releases a discovery identifier configured for the discovery terminal, when the release of radio resources allocated to the discovery terminal is completed.