Method and apparatus for device-to-device communication in wireless communication system

Patent metadata

Field	Value
Publication number	US-2016249198-A1
Application number	US-201415026192-A
Country	US
Kind code	A1
Filing date	Oct 31, 2014
Priority date	Oct 31, 2013
Publication date	Aug 25, 2016
Grant date	—

Abstract

This specification provides a method for performing a discovery procedure in a wireless communication system supporting device to device (D2D) communication. The method is performed by first user equipment and includes monitoring a discovery resource region, selecting a discovery resource for sending a discovery message in the discovery resource region, and transmitting the discovery message to second user equipment through the selected discovery resource. The discovery resource region includes a first discovery resource region and a second discovery resource region.

First claim

1 . A method for performing a discovery procedure in a wireless communication system supporting device to device (D2D) communication, the method performed by first user equipment, comprising:
monitoring a discovery resource region; selecting a discovery resource for sending a discovery message in the discovery resource region; and transmitting the discovery message to second user equipment through the selected discovery resource, wherein the discovery resource region comprises a first discovery resource region and a second discovery resource region, the first discovery resource region comprises a discovery message transmission region of types of user equipment participating in a discovery procedure, and the second discovery resource region comprises a discovery message transmission region of types of user equipment newly participating in the discovery procedure.

2 . The method of claim 1 , wherein the discovery resource region is repeatedly allocated every discovery period.

3 . The method of claim 1 , wherein the discovery resource region further comprises a guard time in which the user equipment changes an operation from transmission to reception or from reception to transmission.

4 . The method of claim 1 , wherein a one-to-one, many-to-one, or many-to-many mapping relationship has been established between resources of the first discovery resource region and resources of the second discovery resource region.

5 . The method of claim 1 , wherein the discovery resource region comprises a discovery message transmission region and a discovery message reception region.

6 . The method of claim 1 , wherein the discovery message transmission region is changed every discovery period according to a hopping pattern.

7 . The method of claim 1 , wherein selecting the discovery resource comprises:
monitoring the second discovery resource region; detecting a resource in which a collision has occurred in the second discovery resource region based on a result of the monitoring; checking a resource of the first discovery resource region mapped to the detected resource; and performing control so that a resource for sending the discovery message is selected from remaining resources of the first discovery resource region other than the checked resource.

8 . The method of claim 1 , wherein the first discovery resource region has a greater size than the second discovery resource region.

9 . The method of claim 1 , wherein the discovery resource region comprises 64 subframes.

10 . The method of claim 1 , wherein:
the first discovery resource region is placed in a front part of the discovery resource region, and the second discovery resource region is placed in a rear part of the discovery resource region.

11 . The method of claim 1 , wherein:
the first discovery resource region comprises 63 subframes, and the second discovery resource region comprises one subframe.

12 . First user equipment for performing a discovery procedure in a wireless communication system supporting device to device (D2D) communication, the first user equipment comprises:
a communication unit configured to transmit and receive radio signals to and from an outside; and a processor functionally coupled to the communication unit, wherein the processor monitors a discovery resource region, selects a discovery resource for transmitting a discovery message in the discovery resource region, and controls the first user equipment so that the discovery message is transmitted to the second user equipment through the selected discovery resource, the discovery resource region comprises a first discovery resource region and a second discovery resource region, the first discovery resource region comprises a discovery message transmission region of types of user equipment participating in a discovery procedure, and the second discovery resource region comprises a discovery message transmission region of types of user equipment newly participating in the discovery procedure.

13 . The first user equipment of claim 12 , wherein the processor monitors the second discovery resource region, detects a resource in which a collision has occurred in the second discovery resource region based on a result of the monitoring, checks a resource of the first discovery resource region mapped to the detected resource, and performs control so that a resource for transmitting the discovery message is selected from remaining resources of the first discovery resource region other than the checked resource.

14 . The first user equipment of claim 12 , wherein the discovery resource region further comprises a guard time in which the user equipment changes an operation from transmission to reception or from reception to transmission.

15 . The first user equipment of claim 12 , wherein the discovery message transmission region is changed every discovery period according to a hopping pattern.

16 . The first user equipment of claim 12 , wherein a one-to-one, many-to-one, or many-to-many mapping relationship has been established between resources of the first discovery resource region and resources of the second discovery resource region.

17 . The first user equipment of claim 12 , wherein the discovery resource region is repeatedly allocated every discovery period.

18 . The first user equipment of claim 12 , wherein the discovery resource region comprises 64 subframes.

Assignees

• Lg Electronics Inc
• Univ Seoul Nat R & Db Found

Inventors

• Kim Hakseong
• Park Seungil
• Choi Sunghyun
• Kim Byounghoon
• Seo Hanbyul

Classifications

• H04W8/005 Primary

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

• H04W72/04

  Wireless resource allocation · CPC title

• H04W48/16

  Discovering, processing access restriction or access information · CPC title