SCHEDULING METHOD FOR INTER-TERMINAL DIRECT COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM, AND DEVICE FOR SAME

• US 20150319745A1
• Filed: 12/03/2013
• Published: 11/05/2015
• Est. Priority Date: 12/14/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: SEO, Hanbyul, KIM, Hakseong
• Granted Patent: US 9,888,459 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

Disclosed in the present application is a method for a terminal to perform inter-terminal direct communication in a wireless communication system. Specifically, the method comprises: a step for receiving, in a random access phase, random access signals from at least one counterpart terminal; and a step, in a resource allocation phase, for using information for scheduling included in the random access signals to allocate resources for the at least one counterpart terminal, and then transmitting the information of the allocated resources to the at least one counterpart terminal, wherein one time unit for inter-terminal direct communication comprises the random access phase, the resource allocation phase, and a phase for the implementation of inter-terminal direct communication.

Claims

1. A method for performing device-to-device (D2D) communication by a user equipment (UE) in a wireless communication system, the method comprising:

receiving random access signals from one or more peer UEs in a random access period; and

allocating resources for the peer UEs using scheduling information comprised in the random access signals and transmitting information about the allocated resources to the peer UEs in a resource allocation period,

wherein one time unit for the D2D communication comprises the random access period, the resource allocation period, and a period for performing the D2D communication.

2. The method according to claim 1, further comprising transmitting a reference signal for performing the D2D communication,

wherein the UE transmits the reference signal prior to the peer UEs.

3. The method according to claim 1, wherein the random access signals are generated based on at least one of UE identifiers (IDs) of the peer UEs, the amounts of traffic to be transmitted by the peer UEs through the D2D communication, and UE identifiers of target UEs of the D2D communication.

4. The method according to claim 1, wherein the random access period is divided into a plurality of random access sub-periods, and

wherein each of the peer UEs transmits the random access signal in a corresponding random access sub-period.

5. The method according to claim 1, wherein one time unit for the D2D communication comprises a period in which the D2D communication is interrupted.

6. The method according to claim 1, wherein the transmitting of the information about the allocated resources to the peer UEs comprises repeatedly transmitting the random access signals received from the peer UEs.

7. A user equipment (UE) for performing device-to-device (D2D) communication in a wireless communication system, the UE comprising:

a radio frequency (RF) module for transmitting and receiving signals to and from a base station (BS) or one or more peer UEs; and

a processor for processing the signals,

wherein the processor controls the RF module to receive random access signals from the peer UEs in a random access period, and to allocate resources for the peer UEs using scheduling information comprised in the random access signals and transmit information about the allocated resources to the peer UEs in a resource allocation period.

8. The UE according to claim 7, wherein the RF module transmits a reference signal for performing the D2D communication, and

wherein the UE transmits the reference signal prior to the peer UEs.

9. The UE according to claim 7, wherein the random access signals are generated based on at least one of UE identifiers (IDs) of the peer UEs, the amounts of traffic to be transmitted by the peer UEs through the D2D communication, and UE identifiers of target UEs of the D2D communication.

10. The UE according to claim 7, wherein the random access period is divided into a plurality of random access sub-periods, and

wherein each of the peer UEs transmits the random access signal in a corresponding random access sub-period.

11. The UE according to claim 7, wherein one time unit for the D2D communication comprises a period in which the D2D communication is interrupted.

12. The UE according to claim 7, wherein the processor repeatedly transmits the random access signals received from the peer UEs to transmit the information about the allocated resources to the peer UEs.