Method and apparatus for device-to-device communication

Patent metadata

Field	Value
Publication number	US-2016309401-A1
Application number	US-201414781283-A
Country	US
Kind code	A1
Filing date	Mar 31, 2014
Priority date	Mar 29, 2013
Publication date	Oct 20, 2016
Grant date	—

Abstract

Provided is a method and apparatus for device-to-device (D2D) communication, and, particularly, a method and apparatus for device-to-device (D2D) communication for discovering an adjacent UE through a network in a wireless cellular communication system. Provided are a method for performing device-to-device communication by a UE, and an apparatus therefor, the method including: transmitting a discovery request for discovering an adjacent UE to a server; scanning a discovery channel during a scanning time according to the discovery request; and performing the device-to-device communication with a discovered adjacent UE when the adjacent UE is discovered as a result of the scanning, wherein the discovery request is used for the server to to transmit an announcement request to the adjacent UE corresponding to the discovery request, and the announcement indication information includes information which allows the adjacent UE to broadcast a discovery signal through the discovery channel during the scanning time.

First claim

1 . A method for performing device-to-device communication by a UE, the method comprising:
transmitting a discovery request for discovering an adjacent UE to a server; scanning a discovery channel during a scanning time according to the discovery request; and performing the device-to-device communication with a discovered adjacent UE when the adjacent UE is discovered as a result of the scanning, wherein the discovery request is used for the server to transmit an announcement request to the adjacent UE corresponding to the discovery request, and the announcement indication information includes information which allows the adjacent UE to broadcast a discovery signal through the discovery channel during the scanning time.

2 . The method of claim 1 , wherein the discovery request includes at least one among an identifier of an application which has requested a discovery for the adjacent UE, location information of the UE, and the scanning time.

3 . The method of claim 1 , wherein the location information of the UE comprises at least one among E-UTRAN Cell Global Identifier (ECGI), Tracking Area Identity (cm), and GPS information on a cell in which the UE stays.

4 . The method of claim 1 , further comprising, before the transmitting of the discovery request:
transmitting a Group Create request for creating a device-to-device communication group to the server; and receiving a Group Create response from the server.

5 . The method of claim 4 , wherein the Group Create request comprises at least one of an identifier of an application which has requested the device-to-device communication group to be created, and a server identifier of another UE to be included in the device-to-device communication group, and
the Group Create response comprises at least one of an identifier of a created device-to-device communication group, and an encryption key for the device-to-device communication group.

6 . The method of claim 4 , further comprising:
transmitting a group modification request for modifying the device-to-device communication group to the server; and receiving a group modification response from the server.

7 . The method of claim 6 , wherein the group modification request comprises at least one of an identifier of the device-to-device communication group and a server identifier of another UE to be added to or deleted from the device-to-device communication group, and
the group modification response comprises at least one of an identifier of the device-to-device communication group and an encryption key for the device-to-device communication group.

8 . A method for performing device-to-device communication by a UE, the method comprising:
receiving, from a base station, announcement indication information for allowing the UE to broadcast a discovery signal for the device-to-device communication; determining whether the announcement indication information is for the UE based on information included in the announcement indication information; and broadcasting the discovery signal through a discovery channel during a scanning time according to the announcement indication information when the announcement indication information is for the UE.

9 . The method of claim 8 , wherein the announcement indication information comprises at least one of an application identifier of a UE which has requested a discovery for the adjacent UE, and information on the scanning time.

10 . The method of claim 9 , wherein the determining of whether the announcement indication information is for the UE comprises
determining whether an application corresponding to the application identifier exists in the UE.

11 . The method of claim 8 , wherein the announcement indication information is received through a system information block (SIB).

12 . The method of claim 8 , further comprising
receiving a group identifier of a device-to-device communication group and an encryption key for the device-to-device communication group from the base station.

13 . The method of claim 8 , wherein the announcement indication information comprises a group identifier of a device-to-device communication group, and
the determining of whether the announcement indication information is for the UE comprises determining whether the group identifier corresponds to a group identifier of the UE.

14 . A method for managing device-to-device communication by a base station, the method comprising:
receiving, from a server, an announcement request for allowing at least one UE, which performs the device-to-device communication, to broadcast a discovery signal for the device-to-device communication; and transmitting announcement indication information to at least one UE which exists in a cell according to the announcement request, wherein the announcement request is used: for a UE, which is to perform the device-to-device communication, to scan the discovery signal during a scanning time set based on the announcement indication information; and for the at least one UE to broadcast the discovery signal during the scanning time.

15 . The method of claim 14 , wherein the announcement request comprises at least one of an application identifier of a UE which has requested a discovery for the adjacent UE, and the scanning time during which the adjacent UE is to be discovered.

16 . The method of claim 14 , wherein the announcement indication information comprises at least one of an identifier of an application which has requested a discovery for the adjacent UE, and a discovery channel through which the adjacent UE is to be discovered.

17 . The method of claim 16 , wherein the announcement indication information is transmitted through a system information block (SIB).

18 . The method of claim 16 , wherein the announcement indication information comprises a group identifier of a device-to-device communication group when the announcement request comprises the group identifier.

19 . A UE for performing device-to-device communication, the UE comprising:
a communication unit for performing data communication with a server or with an adjacent UE; and a control unit for transmitting a discovery request for discovering the adjacent UE to the server, scanning a discovery channel during a scanning time according to the discovery request, and controlling the communication unit to perform the device-to-device communication with a discovered adjacent UE when the adjacent UE is discovered as a result of the scanning, wherein the discovery request is used for the server to transmit an announcement request to the adjacent UE corresponding to the discovery request, and the announcement indication information includes information which allows the adjacent UE to broadcast a discovery signal through the discovery channel during the scanning time.

20 . The UE of claim 19 , wherein the control unit controls the communication unit to transmit, to the server, a Group Create request for creating the device-to-device communication group, or a group modification request for modifying the device-to-device communication group after creation of the device-to-device communication group.

21 . A UE for performing device-to-device communication, the UE comprising:
a communication unit for performing data communication with a base station or with another UE which performs device-to-device communication; and a control unit for determining whether an application identifier included in announcement indication information is identical to an application identi

Assignees

• Samsung Electronics Co Ltd

Inventors

• Baek Youngkyo
• Jeong Kyeongin
• Cho Songyean

Classifications

• H04W48/14

  using user query {or user detection} · CPC title

• H04W88/02 Primary

  Terminal devices · CPC title

• H04W48/16 Primary

  Discovering, processing access restriction or access information · CPC title

• H04W8/005

  Discovery of network devices, e.g. terminals · CPC title