INFORMATION EXCHANGE METHOD AND APPARATUS FOR D2D COMMUNICATION

• US 20140162714A1
• Filed: 12/05/2013
• Published: 06/12/2014
• Est. Priority Date: 12/06/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Kyungkyu, KIM, Daegyun, PARK, Seunghoon, LIM, Chiwoo
• Granted Patent: US 9,426,781 B2
• Time in Patent Office: Days
• US Class Current: 455/509
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 76/11 Allocation or use of connection identifiers
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method and apparatus for exchanging information between devices for use in the pairing process for Device To Device (D2D) communication is provided. A signal transmission/reception method of a device in a mobile communication system includes determining a resource for the device to transmit a pairing signal, transmitting a discovery signal including information on the determined resource, pairing with a neighbor device that received the discovery signal through the resource indicated by the resource information, and communicating data signals with the paired neighbor device. The information exchange method and apparatus for D2D communication is capable of preventing a plurality of devices from attempting pairing on the same frequency simultaneously, thereby improving pairing efficiency and reducing power consumption of the device.

Claims

1. A signal transmission/reception method of a device in a mobile communication system, the method comprising:

determining a resource to transmit a pairing signal for the device;

transmitting a discovery signal including information on the determined resource;

pairing with a neighbor device that received the discovery signal through the resource indicated by the resource information; and

communicating data signals with the paired neighbor device.

2. The method of claim 1, wherein the determining of the resource to transmit the pairing signal comprises:

receiving at least one of information on resource for transmission/reception discovery signal and information on resource for transmission/reception pairing signal from a base station; and

determining one of the resource for transmission/reception as the resource for transmitting the pairing signal.

3. The method of claim 2, wherein the receiving of at least one of information on resource for transmission/reception discovery signal and information on resource for transmission/reception pairing signal comprises:

receiving the information including indices indicating positions of the resource corresponding to the discovery signal transmission/reception resource and the pairing signal transmission/reception resource.

4. The method of claim 2, wherein the at least one of information on resource for transmission/reception discovery signal and information on resource for transmission/reception pairing signal is received through a System Information Block (SIB) signal.

5. The method of claim 1, wherein the determining of the resource to transmit the pairing signal for the device:

receiving at least one discovery signal transmitted by the neighbor device, the discovery signal including the resource information for use in pairing; and

determining the resource for using in transmitting the pairing signal based on the at least one discovery signal received from the neighbor device and the information on the resource for use in pairing of the neighbor device.

6. The method of claim 1, wherein the communicating of the data signals comprises:

transmitting to a base station a Device To Device (D2D) request signal including at least one of device information, paired neighbor device information, pairing connection information, pairing resource information, and device buffer size;

receiving a D2D communication identifier allocated based on at least one of information included in the D2D request signal from the base station; and

communicating the data signals with the neighbor device based on the D2D communication identifier.

7. The method of claim 6, wherein the communicating of the data signals comprising:

receiving data communication resource allocation information corresponding to the D2D communication identifier from the base station;

determining resource for use in data communication based on the data communication resource allocation information and the D2D communication identifier; and

communicating the data signals with the neighbor device through the resource determined for use in data communication.

8. The method of claim 1, wherein the pairing with the neighbor device comprises:

transmitting a first pairing request message to the neighbor device through the determined resource;

receiving a first pairing response message from the neighbor device in response to the first pairing request message; and

performing, if the first pairing response message is received, the pairing with the neighbor device.

9. A device operating in a mobile communication system, the device comprising:

a transceiver configured to transmit and receive signals to and from a base station and a neighbor device; and

a controller configured to control the transceiver, to determine a resource to transmit a pairing signal for the device, to control the device to transmit a discovery signal including information on the determined resource, to perform pairing with a neighbor device that received the discovery signal through the resource indicated by the resource information, and to control the device to communicate data signals with the paired neighbor device.

10. The device of claim 9, wherein the controller is further configured to control the device to receive at least one of information on resource for transmission/reception discovery signal and information on resource for transmission/reception pairing signal from a base station, and to determine one of the resource for transmission/reception as the resource for transmitting the pairing signal.

11. The device of claim 10, wherein the controller is further configured to control the device to receive the information including indices indicating positions of the resource corresponding to the discovery signal transmission/reception resource and the pairing signal transmission/reception resource.

12. The device of claim 10, wherein the at least one of information on resource for transmission/reception discovery signal and information on resource for transmission/reception pairing signal is received through a System Information Block (SIB) signal.

13. The device of claim 9, wherein the controller is further configured to control the device to receive at least one discovery signal transmitted by the neighbor device, the discovery signal including the resource information for use in pairing, and to determine the resource for using in transmitting the pairing signal based on the at least one discovery signal received from the neighbor device and the information on the resource for use in pairing of the neighbor device.

14. The device of claim 9, wherein the controller further configured to control the device to transmit to a base station a Device To Device (D2D) request signal including at least one of device information, paired neighbor device information, pairing connection information, pairing resource information, and device buffer size, to receive a D2D communication identifier allocated based on at least one of information included in the D2D request signal from the base station, and to communicate the data signals with the neighbor device based on the D2D communication identifier.

15. The device of claim 14, wherein the controller is further configured to control the device to receive data communication resource allocation information corresponding to the D2D communication identifier from the base station, to determine resource for use in data communication based on the data communication resource allocation information and the D2D communication identifier, and to communicate the data signals with the neighbor device through the resource determined for use in data communication.

16. The device of claim 9, wherein the controller is further configured to control the device to transmit a first pairing request message to the neighbor device through the determined resource, to receive a first pairing response message from the neighbor device in response to the first pairing request message, and to perform, if the first pairing response message is received, the pairing with the neighbor device.

17. A signal transmission/reception method of a base station in a mobile communication system, the method comprising:

transmitting at least one of a discovery signal transmission/reception resources information and pairing signal transmission/reception resources information to a device; and

receiving a Device To Device (D2D) request signal including at least one of device information, paired neighbor device information, pairing connection information, pairing resource information, and device buffer size,

wherein the device determines one of the pairing signal transmission/reception resources as the resource for use in transmitting the pairing signal.

18. The method of claim 17, further comprising:

transmitting a D2D communication identifier allocated based on at least one of information included in the D2D request signal to the device; and

transmitting information on data transmission/reception resource allocated based on at least one of the information included in the D2D request single to the device.

19. A base station of a mobile communication system, the base station comprising:

a transceiver configured to transmit and receive signals to and from a device; and

a controller configured to control the transceiver to transmit at least one of a discovery signal transmission/reception resources information and pairing signal transmission/reception resources information to a device and to receive a Device To Device (D2D) request signal including at least one of device information, paired neighbor device information, pairing connection information, pairing resource information, and device buffer size,

wherein the device determines one of the pairing signal transmission/reception resources as the resource for use in transmitting the pairing signal.

20. The base station of claim 19, wherein the controller is further configured to control the device to transmit a D2D communication identifier allocated based on at least one of informations included in the D2D request signal to the device and to transmit information on data transmission/reception resource allocated based on at least one of the information included in the D2D request single to the device.