Information exchange method and apparatus for D2D communication

• US 9,426,781 B2
• Filed: 12/05/2013
• Issued: 08/23/2016
• Est. Priority Date: 12/06/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Kim, Kyungkyu, Kim, Daegyun, Park, Seunghoon, Lim, Chiwoo
• Primary Examiner(s): TALUKDER, MD K
• Application Number:
  US14/097,736
• Publication Number:
  US 20140162714A1
• Time in Patent Office: 992 Days
• Field of Search: 455/509, 455/41.1, 455/41.2, 455/41.3
• US Class Current: 1/1
• 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:

transmitting, by the device, a device to device (D2D) request signal to a base station, wherein the D2D request signal includes at least one of device information, paired neighbor device information, pairing connection information, pairing resource information, and device buffer size;

receiving, by the device, information associated with a discovery signal and information associated with a pairing signal from the base station, wherein the information associated with the discovery signal and the information associated with the pairing signal includes an identification of a resource region to use when transmitting or receiving the discovery signal and the pairing signal based on the D2D request;

determining, by the device, a resource to receive the pairing signal for the device;

transmitting, by the device, the discovery signal including information related to the determined resource to receive the pairing signal for the device within a first period;

receiving, by the device, from a neighbor device that received the discovery signal, the pairing signal within a second period using a resource determined based on the information related to the determined resource to receive the pairing signal for the device; and

communicating a data signal with the paired neighbor device during a third period,

wherein the resource for transmitting the pairing signal for the device is selected based on at least one signal received by the neighbor device during the first period.

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

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

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

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

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

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

determining the resource to receive the pairing signal for the device based on the information on the resource for use in pairing for the neighbor device.

6. The method of claim 1, further comprising:

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 signal with the neighbor device based on the D2D communication identifier.

7. The method of claim 6, wherein the communicating of the data signal comprises:

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

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

communicating the data signal 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:

at least one processor configured to;

transmit a device to device (D2D) request signal to a base station, wherein the D2D request includes at least one of device information, paired neighbor device information, pairing connection information, pairing resource information, and device buffer size,

receive information associated with a discovery signal and information associated with a pairing signal from the base station, wherein the information associated with the discovery signal and the information associated with the pairing signal includes an identification of a resource region to use when transmitting or receiving the discovery signal and the pairing signal based on the D2D request,

determine a resource to receive the pairing signal for the device,

transmit the discovery signal including information related to the determined resource to receive the pairing signal within a first period,

receive, from a neighbor device that received the discovery signal, the pairing signal within a second period using a resource determined based on the information related to the determined resource to receive the pairing signal for the device, and

control the device to communicate a data signal with the paired neighbor device during a third period,

wherein the resource for transmitting the pairing signal for the device is selected based on at least one signal received by the neighbor device during the first period.

10. The device of claim 9, wherein the at least one processor is further configured to:

control the device to receive at least one of information on a resource for transmission/reception of the discovery signal and information on a resource for transmission/reception of the pairing signal from the base station, and

determine one of the resource for transmission/reception as the resource for receiving the pairing signal.

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

13. The device of claim 9, wherein the at least one processor is further configured to:

control the device to receive at least one discovery signal transmitted by the neighbor device, the discovery signal including information on a resource for use in pairing for the neighbor device, and

determine the resource to receive the pairing signal based on the information on the resource for use in pairing for the neighbor device.

14. The device of claim 9, wherein the at least one processor is further configured to:

receive a D2D communication identifier allocated based on information included in the D2D request signal from the base station, and

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

15. The device of claim 14, wherein the at least one processor is further configured to:

control the device to receive data communication resource allocation information corresponding to the D2D communication identifier from the base station,

determine resource for use in data communication based on the data communication resource allocation information and the D2D communication identifier, and

communicate the data signal with the neighbor device through the resource determined for use in data communication.

16. The device of claim 9, wherein the at least one processor is further configured to:

control the device to transmit a first pairing request message to the neighbor device through the determined resource,

receive a first pairing response message from the neighbor device in response to the first pairing request message, and

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:

receiving, by the base station, a device to device (D2D) request signal from a device, wherein the D2D request includes at least one of device information, paired neighbor device information, pairing connection information, pairing resource information, and device buffer size; and

transmitting, from the base station to the device, information associated with a discovery signal and information associated with a pairing signal, wherein the information associated with the discovery signal and the information associated with the pairing signal includes an identification of a resource region to use when transmitting or receiving the discovery signal and the pairing signal based on the D2D request,

wherein the device is configured to;

determine a resource to receive a pairing signal for the device based on the information associated with the pairing signal,

transmit the discovery signal including information related to the determined resource to receive the pairing signal for the device within a first period using the information associated with the discovery signal, and

receive the pairing signal for the device from a neighbor device that received the discovery signal, the pairing signal for the device received within a second period using a resource determined based on the information related to the determined resource to receive the pairing signal for the device, and

wherein the resource for transmitting the pairing signal for e device is selected based on at least one signal received by the neighbor device during the first period.

18. The method of claim 17, further comprising:

transmitting, by the base station to the device, a D2D communication identifier allocated based on the identified resource region.

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

at least one processor configured to;

receive, from the device, a device to device (D2D) request signal, wherein the D2D request includes at least one of device information, paired neighbor device information, pairing connection information, pairing resource information, and device buffer size; and

transmit to the device information associated with a discovery signal and information associated with a pairing signal, wherein the information associated with the discovery signal and the information associated with the pairing signal includes an identification of a resource region to use when transmitting or receiving the discovery signal and the pairing signal based on the D2D request,

wherein the device is configured to;

determine a resource to receive a pairing signal for the device based on the information associated with the pairing signal,

transmit the discovery signal including information related to the determined resource to receive the pairing signal for the device within a first period using the information associated with the discovery signal, and

receive the pairing signal for the device from a neighbor device that received the discovery signal, the pairing signal for the device received within a second period using a resource determined based on the information related to the determined resource to receive the pairing signal for the device, and

wherein the resource for transmitting the pairing signal for e device is selected based on at least one signal received by the neighbor device during the first period.

20. The base station of claim 19, wherein the at least one processor is further configured to

transmit a D2D communication identifier allocated based on the identified resource region.