# US 11,115,958 B2 · Method whereby terminal transmits and receives sidelink signals in wireless communication system

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- Number: US 11,115,958 B2
- Document ID: US11115958B2
- Status: Granted
- Kind: B2
- Application number: 16/324,526
- Filed: 2017-08-09
- Published: 2019-06-13
- Granted: 2021-09-07
- Earliest claimed: 2016-08-09
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Hyukjin Chae; Hanbyul Seo
- Web page: https://patentgrep.com/patent/US11115958B2

## CPC

- H04W 72/02: Selection of wireless resources by user or terminal
- H04L 1/18: Automatic repetition systems, e.g. Van Duuren systems
- H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L 1/1835: {Buffer management}
- H04L 1/1896: {ARQ related signaling}
- H04L 5/003: {Arrangements for allocating sub-channels of the transmission path}
- H04L 5/0037: {Inter-user or inter-terminal allocation}
- H04W 72/51: based on terminal or device properties
- H04L 2001/0097: {Relays}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

One embodiment of the present invention relates to a method whereby a first terminal transmits and receives sidelink signals in a wireless communication system, the sidelink signal transmission and reception method comprising the steps of: selecting a resource for executing a second transmission, the selection of which is restricted by the position of a resource selected for a first transmission; and executing the second transmission in the resource selected for the second transmission.

## Claims

### Claim 1

A method of performing a sidelink communication by a user equipment (UE) in a wireless communication system, the method comprising:
selecting a first resource for performing a first signal transmission based on channel sensing on a sidelink resource pool;
selecting a second resource for performing a second signal transmission within the sidelink resource pool based on a time domain position of the first resource selected for the first signal transmission; and
performing the first signal transmission and the second signal transmission based on the first resource and the second resource,
wherein the first signal transmission is related to a new transmission, and the second signal transmission is related to a re-transmission, and
wherein in the selection of the second resource, the UE randomly selects the second resource within the sidelink resource pool while excluding the first resource in time domain such that the second resource is located within a specific number of subframes from a subframe at which the first resource is located, but the second resource is not located at a same time domain position as the first time resource.

### Claim 2 (depends on 1)

The method of claim 1, wherein a first signal of the first signal transmission and the second signal transmission are related to hybrid automatic repeat request (HARQ) transmissions.

### Claim 3

A user equipment (UE) configured to perform sidelink communication, the UE comprising:
a transceiver including a transmitter and a receiver; and
a processor configured to:
select a first resource for performing a first signal transmission based on channel sensing on a sidelink resource pool;
select a second resource for performing a second signal transmission within the sidelink resource pool based on a time domain position of the first resource selected for the first signal transmission; and
perform, through the transceiver, the first signal transmission and the second signal transmission based on the first resource and the second resource,
wherein the first signal transmission is related to a new transmission, and the second signal transmission is related to a re-transmission, and
wherein in the selection of the second resource, the processor randomly selects the second resource within the sidelink resource pool while excluding the first resource in time domain such that the second resource is located within a specific number of subframes from a subframe at which the first resource is located, but the second resource is not located at a same time domain position as the first time resource.

### Claim 4 (depends on 1)

The method of claim 1, wherein the second resource is selected in a range of a subframe #n−k to a subframe #n+k, excluding subframe #n, where subframe #n denotes the time domain position of the first resource, and k denotes the specific number of subframes.

### Claim 5 (depends on 4)

The method of claim 4, wherein the second resource is selected from the range based on channel sensing.

### Claim 6 (depends on 4)

The method of claim 4, wherein k is fixed to a predefined constant.

### Claim 7 (depends on 1)

The method of claim 1, wherein the first resource is selected randomly in the sidelink resource pool based on channel sensing.

### Claim 8 (depends on 1)

The method of claim 1, wherein the first signal transmission includes at least one of sidelink data transmission or sidelink scheduling assignment (SA) transmission.

### Claim 9 (depends on 1)

The method of claim 1, wherein the second signal transmission includes at least one of sidelink data transmission or sidelink scheduling assignment (SA) transmission.

### Claim 10 (depends on 1)

A non-transitory processor-readable medium recorded thereon program code for performing the method of claim 1.

### Claim 11

A device for processing a signal for a sidelink communication, the device comprising:
a memory configured to store instructions; and
a processor configured to perform operations by executing the instructions, the operations comprising:
selecting a first resource for performing a first signal transmission based on channel sensing on a sidelink resource pool;
selecting a second resource for performing a second signal transmission within the sidelink resource pool based on a time domain position of the first resource selected for the first signal transmission; and
performing the first signal transmission and the second signal transmission based on the first resource and the second resource,
wherein the first signal transmission is related to a new transmission, and the second signal transmission is related to a re-transmission, and
wherein in the selection of the second resource, the processor randomly selects the second resource within the sidelink resource pool while excluding the first resource in time domain such that the second resource is located within a specific number of subframes from a subframe at which the first resource is located, but the second resource is not located at a same time domain position as the first time resource.