# US 12,010,656 B2 · User equipment and communication method

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- Number: US 12,010,656 B2
- Document ID: US12010656B2
- Status: Granted
- Kind: B2
- Application number: 17/428,153
- Filed: 2019-02-15
- Published: 2022-01-27
- Granted: 2024-06-11
- Earliest claimed: 2019-02-15
- Assignees: Ntt Docomo, Inc.
- Applicants: Ntt Docomo, Inc.
- Inventors: Shohei Yoshioka; Satoshi Nagata; Huan Wang; Xiaolin Hou
- Web page: https://patentgrep.com/patent/US12010656B2

## CPC

- H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC]
- H04W 72/02: Selection of wireless resources by user or terminal
- H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W 92/18: between terminal devices
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Provided is a user equipment including a transmitting unit that transmits a packet for terminal-to-terminal direct communication and a control unit that selects a transmission resource for transmitting the packet from candidate resources in a resource selection window having a predetermined range.

## Claims

### Claim 1

A terminal comprising:
a receiving unit that receives an SCI format from another terminal of terminal-to-terminal direct communication;
a control unit that selects, as a candidate transmission resource, a resource other than a resource that is determined by the SCI format received from the another terminal, from a resource selection range, the candidate transmission resource being used for data transmission by the terminal-to-terminal direct communication; and
a transmitting unit that transmits an SCI format via a first resource of the selected transmission resource,
wherein the resource selection range is a range from a slot obtained by adding a first value to a reference slot via which a parameter is received from an upper layer, to a slot obtained by adding a second value to the reference slot, and
wherein in response to transmission of the resource being stopped, reselecting a resource replacing the stopped resource.

### Claim 2

A communication system comprising: a terminal; and a base station, wherein
the terminal includes:
a receiving unit that receives an SCI format from another terminal of terminal-to-terminal direct communication;
a control unit that selects, as a candidate transmission resource, a resource other than a resource that is determined by the SCI format received from the another terminal, from a resource selection range, the candidate transmission resource being used for data transmission by the terminal-to-terminal direct communication; and
a transmitting unit that transmits an SCI format via a first resource of the selected transmission resource,
wherein the resource selection range is a range from a slot obtained by adding a first value to a reference slot via which a parameter is received from an upper layer, to a slot obtained by adding a second value to the reference slot, and
wherein in response to transmission of the resource being stopped, reselecting a resource replacing the stopped resource, and
the base station includes
a transmitting unit that transmits the parameter via the upper layer.

### Claim 3

A communication method of a terminal, comprising:
receiving an SCI format from another terminal of terminal-to-terminal direct communication;
selecting, as a candidate transmission resource, a resource other than a resource that is determined by the SCI format received from the another terminal, from a resource selection range, the candidate transmission resource being used for data transmission by the terminal-to-terminal direct communication; and
transmitting an SCI format via a first resource of the selected transmission resource,
wherein the resource selection range is a range from a slot obtained by adding a first value to a reference slot via which a parameter is received from an upper layer, to a slot obtained by adding a second value to the reference slot, and
wherein in response to transmission of the resource being stopped, reselecting a resource replacing the stopped resource.