METHOD AND DEVICE FOR SYNCHRONIZING FRAME NUMBERS BETWEEN DEVICE-TO-DEVICE COMMUNICATION SUPPORTED USER DEVICES

• US 20160192309A1
• Filed: 08/18/2014
• Published: 06/30/2016
• Est. Priority Date: 08/08/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Wooseong, JEONG, Kyeongin
• Granted Patent: US 10,674,464 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 56/0025 synchronizing potentially movable access points
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

A method of synchronizing device-to-device terminals according to an embodiment of the present specification may comprise the steps of: matching timing synchronization with at least one terminal counterpart; and setting a frame number for device-to-device communication after the timing synchronization matching step.

Claims

1. A synchronization method of a Device-to-Device (D2D) terminal comprising:

synchronizing with at least one correspondent terminal; and

setting a frame number for D2D communication after synchronization.

2. The method of claim 1, wherein setting a frame number comprises:

setting the frame number to a preset frame number.

3. The method of claim 1, wherein:

synchronizing with at least one correspondent terminal comprises;

receiving a synchronization signal from the at least one correspondent terminal; and

setting a frame number comprises;

extracting a frame number of at least one correspondent terminal from the synchronization signal; and

setting the frame number for D2D communication according to the extracted frame number.

4. The method of claim 3, wherein the synchronization signal is received via D2D Synch channel (D2DSS) and has a specific time period.

5. The method of claim 3, wherein extracting a frame number comprises:

selecting one of the synchronization signals, received from a number of correspondent terminals, based on the order of priority; and

extracting a frame number from the selected synchronization signal.

6. The method of claim 5, wherein the order of priority in the synchronization signals is determined based on at least one of the following:

An index of a sequence used for a synchronization signal, a previously stored code book and a sequence index list.

7. The method of claim 1, wherein setting a frame number comprises:

receiving a signal via a frame number channel;

extracting one frame number of at least one correspondent terminal from the signal received via the frame number channel; and

setting a frame number for D2D communication according to the extracted frame number.

8. A synchronization apparatus of a Device-to-Device (D2D) terminal comprising:

a transceiver for transmitting/receiving signals to/from at least one correspondent terminal; and

a controller for synchronizing with the at least one correspondent terminal and setting frame numbers for D2D communication, after synchronization.

9. The apparatus of claim 8, wherein the controller sets the frame number for D2D communication to a preset frame number.

10. The apparatus of claim 8, wherein:

the transceiver receives a synchronization signal from the at least one correspondent terminal; and

the controller extracts a frame number of at least one correspondent terminal from the at least one synchronization signal and sets the frame number for D2D communication according to the extracted frame number.

11. The apparatus of claim 10, wherein the synchronization signal is received via D2D Synch channel (D2DSS) and has a specific time period.

12. The apparatus of claim 10, wherein the controller:

selects one of the synchronization signals, received from a number of correspondent terminals, based on the order of priority; and

extracts a frame number from the selected synchronization signal.

13. The apparatus of claim 12, wherein the order of priority in the synchronization signals is determined based on at least one of the following:

An index of a sequence used for a synchronization signal, a previously stored code book and a sequence index list.

14. The apparatus of claim 8, wherein:

the transceiver receives a signal via a frame number channel; and

the controller extracts one frame number of at least one correspondent terminal from the signal received via the frame number channel, and sets a frame number for D2D communication according to the extracted frame number.