# US 12,763,818 B2 · Communication control method and communication control apparatus

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- Number: US 12,763,818 B2
- Document ID: US12763818B2
- Status: Granted
- Kind: B2
- Application number: 18/577,500
- Filed: 2021-07-14
- Published: 2024-10-03
- Granted: 2026-10-13
- Earliest claimed: 2021-07-14
- Assignees: NTT, Inc.
- Applicants: NTT, Inc.
- Inventors: Shuki Wai; Daisei Uchida; Tatsuhiko Iwakuni; Takuto Arai; Naoki Kita
- Web page: https://patentgrep.com/patent/US12763818B2

## CPC

- H04B 7/0408: using two or more beams, i.e. beam diversity
- H04B 7/088: {using beam selection}
- H04B: TRANSMISSION

## Abstract

A communication control method includes: a transmission step of simultaneously transmitting beam specifying signals including identical beam identifiers from a plurality of antennas to a wireless station for each of the beam identifiers by transmission beams associated with the beam identifiers; a reception step of receiving, by each of the plurality of antennas, a report signal including a selected beam identifier indicating a beam identifier selected on the basis of reception qualities of the beam specifying signals for the respective beam identifiers in the wireless station; and a selection step of selecting an antenna to be used for communication with the wireless station on the basis of reception qualities of the report signal respectively received by the plurality of antennas, and selecting a transmission beam associated with the selected beam identifier as a transmission beam to be used for communication with the wireless station.

## Claims

### Claim 1

A communication control method comprising:
simultaneously transmitting identical beam specifying signals respectively including an identical beam identifier from a plurality of antennas to a wireless station by transmission beams associated with the identical beam identifier;
receiving, by at least one of the plurality of antennas, a report signal indicating a selected beam including the identical beam identifier, the selected beam being selected on a basis of reception qualities of the identical beam specifying signals in the wireless station; and
selecting a transmission beam associated with the identical beam identifier as a transmission beam to be used for communication with the wireless station.

### Claim 2 (depends on 1)

The communication control method according to claim 1, wherein
the identical beam specifying signals are transmitted from the plurality of antennas by using unmodulated waves.

### Claim 3 (depends on 1)

The communication control method according to claim 1, wherein
the identical beam specifying signals are sounding reference signals.

### Claim 4 (depends on 1)

The communication control method according to claim 1,
wherein, in the reception of the report signal, the report signal is received by the plurality of antennas.

### Claim 5

A communication control method for a wireless communication system including a first wireless station and a second wireless station,
the communication control method comprising:
simultaneously transmitting, by the first wireless station, identical beam specifying signals respectively including an identical beam identifier from a plurality of antennas to the second wireless station by transmission beams associated with the identical beam identifier;
receiving, by the second wireless station, the identical beam specifying signals transmitted from the first wireless station;
selecting, by the second wireless station, a selected beam including the identical beam identifier, the selected beam being selected on a basis of reception qualities of the identical beam specifying signals;
transmitting, by the second wireless station, a report signal indicating the selected beam to the first wireless station;
receiving, by the first wireless station, the report signal by at least one of the plurality of antennas; and
selecting, by the first wireless station, a transmission beam associated with the identical beam identifier as a transmission beam to be used for communication with the second wireless station.

### Claim 6

A communication control device comprising:
a transceiver that simultaneously transmits identical beam specifying signals respectively including an identical beam identifier from a plurality of antennas to a wireless station by transmission beams associated with the identical beam identifier;
a receiver that receives, by each at least one of the plurality of antennas, a report signal indicating a selected beam including the identical beam identifier, the selected beam being selected on a basis of reception qualities of the identical beam specifying signals in the wireless station; and
a selector that selects a transmission beam associated with the identical beam identifier as a transmission beam to be used for communication with the wireless station.