# US 10,485,044 B2 · Communication control method, user terminal, and communication apparatus

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- Number: US 10,485,044 B2
- Document ID: US10485044B2
- Status: Granted
- Kind: B2
- Application number: 15/644,046
- Filed: 2017-07-07
- Published: 2017-10-26
- Granted: 2019-11-19
- Earliest claimed: 2013-10-11
- Assignees: KYOCERA Corporation
- Applicants: Kyocera Corporation
- Inventors: Masato Fujishiro; Chiharu Yamazaki; Kugo Morita; Yushi Nagasaka; Fangwei Tong; Henry Chang
- Web page: https://patentgrep.com/patent/US10485044B2

## CPC

- H04W 76/15: Setup of multiple wireless link connections
- H04L 5/0062: {Avoidance of ingress interference, e.g. ham radio channels}
- H04L 47/40: using split connections
- H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
- H04W 8/005: {Discovery of network devices, e.g. terminals}
- H04W 52/383: {power control in peer-to-peer links}
- H04W 68/12: Inter-network notification
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 72/51: based on terminal or device properties
- H04W 72/53: based on regulatory allocation policies
- H04W 74/006: {in the downlink, i.e. towards the terminal}
- H04W 76/14: Direct-mode setup
- H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00)
- H04W 76/27: Transitions between radio resource control [RRC] states
- 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)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A communication control method comprises: receiving, by a user terminal, from a base station, first information indicating a Device to Device (D2D) frequency available in a D2D discovery procedure for discovering a proximal terminal; and using, by the user terminal, not only the frequency indicated by the first information, but also a frequency not indicated by the first information. The frequency not indicated by the first information is different from the frequency indicated by the first information and is indicated by second information received from another cell different from a cell in which the user terminal exists.

## Claims

### Claim 1

A communication control method, comprising:
receiving, by a user terminal, from a base station in a serving cell of a first Public Land Mobile Network (PLMN), first information including information of available radio resources for directly receiving, by the user terminal, a discovery signal in a frequency of the serving cell;
receiving, by the user terminal, second information transmitted by a System Information Block (SIB) from another base station in another cell having another frequency different from the frequency of the serving cell, wherein the second information indicates available radio resources for directly receiving, by the user terminal, a discovery signal from another user terminal in the other frequency of the other cell of a second PLMN different from the first PLMN;
transmitting, by the user terminal, the second information received from the other base station, to the base station in the serving cell; and
directly receiving, by the user terminal, the discovery signal from the other user terminal existing in the other cell, by using the available radio resources in the second information.

### Claim 2

A user terminal, comprising:
a receiver configured to:
receive, from a base station in a serving cell of a first Public Land Mobile Network (PLMN), first information including information of available radio resources for directly receiving, by the user terminal, a discovery signal in a frequency of the serving cell,
receive, from another base station in another cell having another frequency different from the frequency of the serving cell, second information transmitted by a System Information Block (SIB), wherein the second information indicates available radio resources for directly receiving, by the user terminal, a discovery signal from another user terminal in the other frequency of the other cell of a second PLMN different from the first PLMN, and
directly receive the discovery signal from the other user terminal existing in the other cell, by using the available radio resources in the second information; and
a transmitter configured to transmit the second information received from the other base station, to the base station in the serving cell.

### Claim 3

A processor, communicatively coupled to a memory including a program, wherein the processor is configured to control a user terminal, and to execute the program stored in the memory to perform processes of:
receiving, from a base station in a serving cell of a first Public Land Mobile Network (PLMN), first information including information of available radio resources for directly receiving, by the user terminal, a discovery signal in a frequency of the serving cell;
receiving, from another base station in another cell having another frequency different from the frequency of the serving cell, second information transmitted by a System Information Block (SIB), wherein the second information indicates available radio resources for directly receiving, by the user terminal, a discovery signal from another user terminal in the other frequency of the other cell of a second PLMN different from the first PLMN;
transmitting the second information received from the other base station, to the base station in the serving cell; and
directly receiving the discovery signal from the other user terminal existing in the other cell, on a basis of the second information.