Radio communication system, control method and control device for radio communication system, and radio communication system control program

Patent metadata

Field	Value
Publication number	US-12317144-B2
Application number	US-202018010038-A
Country	US
Kind code	B2
Filing date	Jun 15, 2020
Priority date	Jun 15, 2020
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

A specific signal in a radio communication system includes at least one of a synchronization signal and a reference signal. A first radio communication system performing radio communication in a first cell generates the specific signal based on a first seed and uses a first resource mapping pattern as a resource mapping pattern of the specific signal. A second radio communication system performing radio communication in a second cell that is adjacent to the first cell generates the specific signal based on a second seed and uses a second resource mapping pattern as a resource mapping pattern of the specific signal. When the first resource mapping pattern is identical to the second resource mapping pattern, the first seed and the second seed are set to be different from each other through sequence seed control.

First claim

The invention claimed is:

1. A radio communication system that performs radio communication in a first cell, the radio communication system comprising:
a base station configured to generate, based on a first seed, a specific signal including at least one of a synchronization signal and a reference signal and to use a first resource mapping pattern as a resource mapping pattern of the specific signal to perform the radio communication; and
a control device, including one or more processors, configured to set the first seed and the first resource mapping pattern, wherein
in a second cell that is adjacent to the first cell, a second radio communication system is configured to generate the specific signal based on a second seed and to use a second resource mapping pattern as a resource mapping pattern of the specific signal to perform radio communication, and
the control device is configured to set the first seed to be different from the second seed when the first resource mapping pattern is identical to the second resource mapping pattern.

2. The radio communication system according to claim 1 , wherein
the control device is configured to:
receive a notification of at least one seed candidate that is different from the second seed from the second radio communication system; and
select the first seed from the at least one seed candidate.

3. The radio communication system according to claim 1 , wherein
the control device is configured to:
receive a notification of the second seed from the second radio communication system; and
select the first seed that is different from the second seed from among predetermined seed candidates.

4. The radio communication system according to claim 1 , wherein
the control device is configured to:
recognize the second seed based on the specific signal included in a signal transmitted from a base station of the second radio communication system; and
select the first seed that is different from the second seed from among predetermined seed candidates.

5. The radio communication system according to claim 1 , wherein
the control device is configured to periodically switch the first seed between predetermined seed candidates.

6. A control method for a radio communication system, wherein
in a first cell, a first radio communication system is configured to generate, based on a first seed, a specific signal including at least one of a synchronization signal and a reference signal and to use a first resource mapping pattern as a resource mapping pattern of the specific signal to perform radio communication, and
in a second cell that is adjacent to the first cell, a second radio communication system is configured to generate the specific signal based on a second seed and to use a second resource mapping pattern as a resource mapping pattern of the specific signal to perform radio communication,
the control method comprising a process of setting the first seed and the second seed to be different from each other when the first resource mapping pattern is identical to the second resource mapping pattern.

7. A control device for a radio communication system, wherein
in a first cell, the radio communication system is configured to generate, based on a first seed, a specific signal including at least one of a synchronization signal and a reference signal and to use a first resource mapping pattern as a resource mapping pattern of the specific signal to perform radio communication, and
in a second cell that is adjacent to the first cell, a second radio communication system is configured to generate the specific signal based on a second seed and to use a second resource mapping pattern as a resource mapping pattern of the specific signal to perform radio communication,
the control device comprising one or more processors configured to set the first seed to be different from the second seed when the first resource mapping pattern is identical to the second resource mapping pattern.

Assignees

• Nippon Telegraph & Telephone

Inventors

• Murayama Daisuke
• Kawamura Kenichi

Classifications

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/005

  of common pilots, i.e. pilots destined for multiple users or terminals · CPC title

• H04W72/04

  Wireless resource allocation · CPC title

• H04W36/0072 Primary

  of resource information of target access point · CPC title