# US 11,115,789 B2 · Resource allocation method for V2X communication in wireless communication system and apparatus therefor

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- Number: US 11,115,789 B2
- Document ID: US11115789B2
- Status: Granted
- Kind: B2
- Application number: 16/346,656
- Filed: 2017-11-06
- Published: 2020-02-20
- Granted: 2021-09-07
- Earliest claimed: 2016-11-04
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Youngtae Kim; Hanbyul Seo; Myoungseob Kim; Seungmin Lee
- Web page: https://patentgrep.com/patent/US11115789B2

## CPC

- H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04L 1/1887: {Scheduling and prioritising arrangements}
- H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH}
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)}
- H04L 5/10: with dynamo-electric generation of carriers; with mechanical filters or demodulators
- H04W 28/26: Resource reservation
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- 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

The present invention relates to a resource allocation method of a vehicle-to-everything (V2X) transmission terminal in a wireless communication system and an apparatus therefor. More specifically, the method comprises the steps of: transmitting, to a V2X receiving terminal, a first V2X signal for a V2X service; receiving, from the V2X receiving terminal, an acknowledgment/negative-acknowledgment (ACK/NACK) for a V2X signal; and, if the NACK is received from the V2X receiving terminal, allocating, for a second V2X signal, a second time-frequency resource reserved in association with a first time-frequency resource for the first V2X signal.

## Claims

### Claim 1

A method for a first user equipment (UE) operating in a wireless communication system, the method comprising:
receiving, by the first UE, from a network, sidelink resource information on a set of transmission resources for a sidelink data;
receiving, by the first UE, from the network, uplink resource information to report Hybrid automatic repeat request (HARQ)-acknowledgment (ACK) information;
repeatedly transmitting, by the first UE, to a second UE, the sidelink data using the set of transmission resources; and
transmitting, by the first UE, to the network, the HARQ-ACK information generated based on a plurality of feedback received from the second UE,
wherein the plurality of the feedback corresponds to the sidelink data repeatedly transmitted, and
wherein the HARQ-ACK information is transmitted at a transmission time that is after a last time resources in the set of transmission resources.

### Claim 2 (depends on 1)

The method of claim 1,
wherein the set of transmission resources includes an initial transmission resource and a retransmission resource for the sidelink data, and
wherein based on at least one of the plurality of feedback indicating ACK for the sidelink data, the remaining retransmission resource for the sidelink data is not used.

### Claim 3 (depends on 1)

The method of claim 1, wherein the plurality of feedback are information regarding reception of the sidelink data.

### Claim 4

A first user equipment (UE) operating in a wireless communication system, the first UE comprising:
a transceiver; and
a processor operationally coupled to the transceiver, wherein the processor is configured to:
receive, from a network, a first control channel including sidelink resource information on a set of transmission resources for a sidelink data,
receive, from the network, a second control channel including uplink resource information to report Hybrid automatic repeat request (HARQ)-acknowledgement (ACK) information,
repeatedly transmit, to a second UE, the sidelink data using the set of transmission resources, and
transmit, to the network, the HARQ-ACK information generated based on a plurality of feedback received from the second UE,
wherein the plurality of feedback corresponds to the sidelink data repeatedly transmitted, and
wherein the HARQ-ACK information is transmitted at a transmission time that is after a last time resource in the set of transmission resources.

### Claim 5 (depends on 4)

The first UE of claim 4,
wherein the set of transmission resources includes an initial transmission resource and a retransmission resource for the sidelink data, and
wherein based on at least one of the plurality of feedback indicating ACK for the sidelink data, the remaining retransmission resource for the sidelink data is not used.

### Claim 6 (depends on 4)

The first UE of claim 4, wherein the plurality of feedback are information regarding reception of the sidelink data.