# US 10,772,014 B2 · Base station and user terminal

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- Number: US 10,772,014 B2
- Document ID: US10772014B2
- Status: Granted
- Kind: B2
- Application number: 16/189,555
- Filed: 2018-11-13
- Published: 2019-04-04
- Granted: 2020-09-08
- Earliest claimed: 2016-05-13
- Assignees: KYOCERA Corporation
- Applicants: Kyocera Corporation
- Inventors: Hiroyuki Adachi
- Web page: https://patentgrep.com/patent/US10772014B2

## CPC

- H04W 36/0058: {Transmission of hand-off measurement information, e.g. measurement reports}
- H04W 36/0072: {of resource information of target access point}
- H04W 36/0077: {of access information of target access point}
- H04W 36/38: by fixed network equipment
- H04W 56/00: Synchronisation arrangements
- H04W 72/02: Selection of wireless resources by user or terminal
- H04W 72/04: Wireless resource allocation
- H04W 4/46: for vehicle-to-vehicle communication [V2V]
- H04W 36/08: Reselecting an access point
- 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

A base station according to one embodiment comprises: a controller configured to manage a first cell; and a transmitter configured to transmit to a radio terminal a message for a handover from the first cell to a second cell. The message includes information of a resource pool used for a proximity-based service in the second cell, and synchronization setting information for transmitting or receiving a synchronization signal in the proximity-based service in the second cell.

## Claims

### Claim 1

A base station, comprising:
a controller configured to manage a first cell; and
a transmitter configured to transmit to a radio terminal a message for a handover from the first cell to a second cell, wherein
the message includes information of a resource pool used for a proximity-based service in the second cell, and synchronization setting information for the radio terminal transmitting a synchronization signal in the proximity-based service in the second cell, and
the synchronization setting information includes at least one of information related to transmission timing of the synchronization signal and a parameter used for transmitting the synchronization signal.

### Claim 2 (depends on 1)

The base station according to claim 1, wherein
the controller controls a process of receiving information indicating, from the radio terminal.

### Claim 3 (depends on 1)

The base station according to claim 1, wherein the controller controls:
a process of transmitting a first message of a request for the handover to another base station configured to manage the second cell, and
a process of receiving from the other base station a second message for notifying the base station of approval of the request,
wherein the second message includes the information of the resource pool and the synchronization setting information.

### Claim 4 (depends on 1)

The base station according to claim 1, wherein
the controller controls a process of receiving information indicating a type of the proximity-based service being executed by the radio terminal, from the radio terminal.

### Claim 5

An apparatus for controlling a radio terminal, the apparatus comprising:
a processor and a memory coupled to the processor, the processor is configured to receive from a first cell, a message for a handover from the first cell to a second cell, wherein
the message includes information of a resource pool used for a proximity-based service in the second cell, and synchronization setting information for the radio terminal transmitting a synchronization signal in the proximity-based service in the second cell, and
the synchronization setting information includes at least one of information related to transmission timing of the synchronization signal and a parameter used for transmitting the synchronization signal.

### Claim 6

A radio terminal, comprising:
a receiver configured to receive from a first cell, a message for a handover from the first cell to a second cell, wherein
the message includes information of a resource pool used for a proximity-based service in the second cell, and synchronization setting information for the radio terminal transmitting a synchronization signal in the proximity-based service in the second cell, and
the synchronization setting information includes at least one of information related to transmission timing of the synchronization signal and a parameter used for transmitting the synchronization signal.

### Claim 7

A communication method comprising:
transmitting to a radio terminal, by a first base station managing a first cell, a message for a handover from the first cell to a second cell, wherein
the message includes information of a resource pool used for a proximity-based service in the second cell, and synchronization setting information for the radio terminal transmitting a synchronization signal in the proximity-based service in the second cell, and
the synchronization setting information includes at least one of information related to transmission timing of the synchronization signal and a parameter used for transmitting the synchronization signal.