# US 2020/0287686 A1 · Signal transmitting method for device-to-device (d2d) communication in wireless communication system and device therefor

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- Number: US 2020/0287686 A1
- Document ID: US20200287686A1
- Status: Published application
- Kind: A1
- Application number: 16/883,993
- Filed: 2020-05-26
- Published: 2020-09-10
- Earliest claimed: 2014-02-10
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Youngtae KIM; Hanbyul SEO; Kijun KIM; Inkwon SEO; Hyukjin CHAE; Suckchel YANG; Myoungseob KIM
- Web page: https://patentgrep.com/patent/US20200287686A1

## CPC

- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/20: Control channels or signalling for resource management
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W 88/02: Terminal devices
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

The present invention relates to a method and a device for transmitting a device-to-device (D2D) signal of a first terminal in a wireless communication system. Particularly, the method comprises the steps of: receiving at least one parameter for D2D communication which includes a scheduling assignment identity (ID); and transmitting a D2D signal generated by using the scheduling assignment ID to a second terminal through an uplink subframe, wherein the scheduling assignment ID is associated with the second terminal for the D2D communication.

## Claims

### Claim 1

A method of transmitting a device-to-device (D2D) data signal by a user equipment (UE) in a wireless communication system, the method comprising:
receiving a destination identity (ID) for D2D communication;
transmitting the D2D data signal; and
transmitting a DeModulation Reference Signal (DM-RS) related to the D2D data signal,
wherein a scrambling sequence for the D2D data signal, a value of a cyclic shift of the DM-RS, and a value of an orthogonal cover code (OCC) of the DM-RS are determined based on respective N bits among M bits constituting the destination ID, and
wherein the N bits are less than the M bits.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the D2D data signal is transmitted on an uplink subframe.

### Claim 3 (depends on 1)

The method according to claim 1, further comprising:
receiving subframe information with the destination ID for transmission of the D2D data signal,
wherein the D2D data signal is transmitted based on the subframe information.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the OCC is selected from [w(0) w(1)]=[1 1] or [w(0) w(1)]=[1 −1] based on the respective N bits.

### Claim 5

A user equipment (UE) for transmitting a device-to-device (D2D) data signal in a wireless communication system, the first UE comprising:
a transmitter and a receiver; and
a processor, coupled to the transmitter and receiver, that:
receives a destination identity (ID) for D2D communication,
controls the transmitter to transmit the D2D data signal, and
controls the transmitter to transmit, a DeModulation Reference Signal (DM-RS) related to the D2D data signal,
wherein a scrambling sequence for the D2D data signal, a value of a cyclic shift of the DM-RS, and a value of an orthogonal cover code (OCC) of the DM-RS are determined based on respective N bits among M bits constituting the destination ID, and,
wherein the N bits are less than the M bits.

### Claim 6 (depends on 1)

The UE according to claim 1, wherein the D2D data signal is transmitted on an uplink subframe.

### Claim 7 (depends on 5)

The UE according to claim 5, wherein the processor is further configured to:
receive subframe information with the destination ID for transmission of the D2D data signal,
wherein the D2D data signal is transmitted based on the subframe information.

### Claim 8 (depends on 5)

The UE according to claim 5, wherein the OCC is selected from [w(0) w(1)]=[1 1] or [w(0) w(1)]=[1 −1] based on the respective N bits.