# US 2022/0046743 A1 · Mobile communication system, user terminal, and base station

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- Number: US 2022/0046743 A1
- Document ID: US20220046743A1
- Status: Published application
- Kind: A1
- Application number: 17/506,534
- Filed: 2021-10-20
- Published: 2022-02-10
- Earliest claimed: 2013-02-19
- Assignees: KYOCERA Corporation
- Applicants: KYOCERA Corporation
- Inventors: Noriyoshi FUKUTA; Kugo MORITA; Masato FUJISHIRO
- Web page: https://patentgrep.com/patent/US20220046743A1

## CPC

- H04W 76/27: Transitions between radio resource control [RRC] states
- H04W 8/005: {Discovery of network devices, e.g. terminals}
- H04W 48/10: using broadcasted information
- H04W 48/12: using downlink control channel
- H04W 52/04: Transmission power control [TPC]
- H04W 52/38: TPC being performed in particular situations
- H04W 52/383: {power control in peer-to-peer links}
- H04W 72/04: Wireless resource allocation
- H04W 72/51: based on terminal or device properties
- H04W 76/10: Connection setup
- H04W 76/14: Direct-mode setup
- H04W 92/18: between terminal devices
- H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range}
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals
- H04W 88/10: adapted for operation in multiple networks, e.g. multi-mode access points
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A user equipment, method, and chipset receive from a base station resource information indicating usable radio resources for data transmitted in the direct communication, detect a power when receiving a radio signal directly transmitted from another user terminal, and determine, based on the result of the process, a radio resource used to transmit the data from among the usable radio resources indicated by the resource information.

## Claims

### Claim 1

A user equipment having a function of direct communication, comprising:
a receiver configured to receive from a base station resource information indicating usable radio resources for data transmitted in the direct communication; and
a controller configured to detect a power when receiving a radio signal directly transmitted from another user terminal, wherein
the controller is configured to determine, based on the result of the process, a radio resource used to transmit the data from among the usable radio resources indicated by the resource information.

### Claim 2

A method applied to a user equipment having a function of direct communication, the method comprising:
receiving from a base station resource information indicating usable radio resources for data transmitted in the direct communication;
detecting a power when receiving a radio signal directly transmitted from another user terminal; and
determining, based on the result of the process, a radio resource used to transmit the data from among the usable radio resources indicated by the resource information.

### Claim 3

A chipset included in a user equipment having a function of direct communication, the chipset comprising:
a processor and a memory coupled to the processor, the processor configured to perform processes of:
receiving from a base station resource information indicating usable radio resources for data transmitted in the direct communication;
detecting a power when receiving a radio signal directly transmitted from another user terminal; and
determining, based on the result of the process, a radio resource used to transmit the data from among the usable radio resources indicated by the resource information.