Mobile communications system, base station, mobile station, and wireless communication method

Patent metadata

Field	Value
Publication number	US-9673873-B2
Application number	US-201213567579-A
Country	US
Kind code	B2
Filing date	Aug 6, 2012
Priority date	Feb 12, 2010
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

In a mobile communications system, a base station includes a generation unit and a transmission unit. The generation unit generates broadcast information indicating, among a plurality of available frequency bands for wireless communication, a frequency band to be used to transmit same data at a same timing with another base station. The transmission unit broadcasts the broadcast information. A mobile station includes a reception unit and a control unit. The reception unit receives the broadcast information broadcast by the base station. The control unit controls, based on the broadcast information, reception of same data transmitted at the same timing from the base station and the other base station.

First claim

What is claimed is:

1. A mobile communications system comprising:
a mobile station; and
a base station configured to communicate with the mobile station,
the base station including:
a generator configured to generate frequency band information including an identification number assigned to a first frequency band among a plurality of identification numbers assigned to a plurality of frequency bands respectively, wherein the first frequency band is to be used to broadcast same broadcast/multicast data at a same timing with another base station, and wherein a second frequency band among the plurality of frequency bands is to be used to transmit dedicated data, and
a transmitter configured to broadcast the frequency band information; and

the mobile station including:
a receiver configured to receive the frequency band information from the base station, and
a controller configured to control, based on the identification number, assigned to the first frequency band, included in the frequency band information, reception of the same broadcast/multicast data with the first frequency band.

2. The mobile communications system according to claim 1 , wherein when the first frequency band indicated by the frequency band information is different from the second frequency band used by the mobile station to connect to the base station, the controller makes a change or addition of a frequency band to be used.

3. The mobile communications system according to claim 1 , wherein the transmitter transmits, using a first physical broadcast channel, other frequency band information to be used by the mobile station to set up a connection to the base station, and broadcasts the frequency band information using a second physical broadcast channel which is different from the first physical broadcast channel.

4. The mobile communications system according to claim 3 , wherein
the first physical broadcast channel is a channel received by both a first-type mobile station and a second-type mobile station, and the second physical broadcast channel is a channel received by the second-type mobile station, wherein the first-type mobile station performing communication based on a communication specification or a communication system, and the second-type mobile station performing communication based on another communication specification or another communication system.

5. The mobile communications system according to claim 1 , wherein in order to broadcast the frequency band information, the transmitter uses a control channel for broadcasting control information to be used by the mobile station to receive the same broadcast/multicast data at the same timing with said another base station.

6. The mobile communications system according to claim 1 , wherein:
among the plurality of frequency bands, at least a lowest frequency band is used to broadcast the same broadcast/multicast data at the same timing with said another base station.

7. A base station for performing wireless communication with a mobile station capable of receiving data transmitted by a plurality of base stations, the base station comprising:
a generator configured to generate frequency band information including an identification number assigned to a first frequency band among a plurality of identification numbers assigned to a plurality of frequency bands respectively, wherein the first frequency band is to be used to broadcast same broadcast/multicast data at a same timing with another base station, and wherein a second frequency band among the plurality of frequency bands is to be used to transmit dedicated data; and
a transmitter configured to broadcast the frequency band information.

8. A mobile station for performing wireless communication with a first base station and a second base station, the mobile station comprising:
a receiver configured to receive frequency band information, which is broadcasted by the first base station, the frequency band information including an identification number assigned to a first frequency band among a plurality of identification numbers assigned to the plurality of frequency bands respectively, wherein the first frequency band is to be used to broadcast same broadcast/multicast data at a same timing with the second base station, and wherein a second frequency band among the plurality of frequency bands is to be used to transmit dedicated data; and
a controller configured to control, based on the identification number, assigned to the first frequency band, included in the frequency band information, reception of the same broadcast/multicast data with the first frequency band.

9. A wireless communication method used in a mobile communications system which includes a first base station, a second base station, and a mobile station capable of performing wireless communication, the wireless communication method comprising:
generating, by the first base station, frequency band information including an identification number assigned to a first frequency band among a plurality of identification numbers assigned to a plurality of frequency bands respectively, wherein the first frequency band is to be used to broadcast same broadcast/multicast data at a same timing with the second base station, and wherein a second frequency band among the plurality of frequency bands is to be used to transmit dedicated data;
broadcasting, by the first base station, the frequency band information;
receiving, by the mobile station, the frequency band information from the first base station; and
receiving, by the mobile station, the same broadcast/multicast data with the first frequency band indicated by the frequency band information.

Assignees

• Ode Takayoshi
• Fujitsu Ltd

Inventors

• Ode Takayoshi

Classifications

• H04B7/022 Primary

  Site diversity; Macro-diversity (using two or more spaced independent antennas H04B7/04) · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04W72/30

  Resource management for broadcast services · CPC title

• H04W72/005

  Electricity · mapped topic