DEVICE TO DEVICE COMMUNICATION METHOD USING PARTIAL DEVICE CONTROL

• US 20170019942A1
• Filed: 09/28/2016
• Published: 01/19/2017
• Est. Priority Date: 04/26/2012
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: KO, Young Jo, AHN, Jae Young, SEO, Bang Won, NOH, Tae Gyun
• Granted Patent: US 10,070,472 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/24 Testing correct operation
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/383 power control in peer-to-peer links
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/14 Direct-mode setup

Abstract

A device to device (D2D) communication method based on a partial device control is disclosed. According to the present invention, the D2D communication method and, particularly, to a partial device control method for D2D communication a relates to, and provides a D2D resource allocation and release method, a D2D HARQ process operating method, a link adaptation method comprising D2D link power control and adaptive modulation and coding (AMC), a D2D control information signaling method, a CSI reporting method for D2D communication, and contents of a CSI report. The present invention can enhance the advantages of and compensate for the disadvantages of both methods through the combination of a base station control a base station control type D2D communication method and a device control type D2D communication method.

Claims

1. A device-to-device (D2D) communication method as an operation method of a first user equipment (UE) for measuring and reporting channel state information (CSI) on D2D communication in which the first UE and a second UE participate, the D2D communication method comprising:

at a request of a base station, measuring and reporting first CSI on a whole or a part of an entire cellular band to the base station;

receiving D2D resource allocation information based on the first CSI from the base station; and

measuring and reporting second CSI on D2D resources based on the D2D resource allocation information to the second UE.

2. The D2D communication method of claim 1, wherein the first CSI is measured on the basis of a sounding reference signal (SRS) transmitted by the second UE, and reported to the base station periodically or at the request of the base station.

3. The D2D communication method of claim 1, wherein the second CSI is measured on the basis of a demodulation reference signal (DM-RS) or a sounding reference signal (SRS) transmitted by the second UE.

4. The D2D communication method of claim 1, wherein, when the D2D resources based on the D2D resource allocation information are divided into non-consecutive first and second regions, the second CSI includes a precoding matrix indicator (PMI) to be applied to the first region and the second region in common.

5. The D2D communication method of claim 1, wherein, when the D2D resources based on the D2D resource allocation information are divided into non-consecutive first and second regions, the second CSI includes a precoding matrix indicator (PMI) of the first region and a PMI of the second region.