RADIO COMMUNICATION SYSTEM

• US 20110051685A1
• Filed: 08/20/2010
• Published: 03/03/2011
• Est. Priority Date: 08/28/2009
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Saitou, Naoyuki
• Granted Patent: US 8,320,253 B2
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04W 36/02 Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
• CPC Class Codes: H04W 92/20 between access points

Abstract

A radio communication system includes: a first base station for communicating with a mobile station in a first area; and a second base station for communicating with the mobile station in a second area; the first base station including: a first receiving unit for receiving connection control information from the second station; a first setup unit for generating scheduling information; and a first transmitting unit for transmitting the generated scheduling information to the second base station and for transmitting the data decided to send to the mobile station on the basis of the scheduling information; the second base station including: a second transmitting unit for transmitting the connection control information and for transmitting the data decided to send to the mobile station on the basis of the scheduling information; and a second receiving unit for receiving the scheduling information from the first base station.

Claims

1. A radio communication system for communicating with a mobile station comprising:

a first base station which communicates with the mobile station in a first area; and

a second base station which communicates with the mobile station in a second area, a part of the second area being same with the first area;

the first base station comprising;

a first receiving unit configured to receive connection control information from the second base station, the connection control information including information indicating data to be sent from the second base station to the mobile station;

a first setup unit configured to receive scheduling information for deciding whether the data sent to the mobile station is sent from the first base station or not, based on the received connection control information and a communication resource that can be used to send data from the first base station to the mobile station; and

a first transmitting unit configured to transmit the generated scheduling information to the second base station and for transmitting the data decided to send to the mobile station on the basis of the scheduling information;

the second base station comprising;

a second transmitting unit configured to transmit the connection control information to the first base station and for transmitting the data decided to send to the mobile station on the basis of the scheduling information; and

a second receiving unit configured to receive the scheduling information from the first base station.

2. The radio communication system of claim 1, wherein the second receiving unit sends the scheduling information to the mobile station.

3. The radio communication system of claim 1, the first base station further comprising:

a determination unit configured to compare a first communication quality information with a second communication quality information, the first communication quality information indicating quality of communication between the first base station and the mobile station, the second communication quality information indicating quality of communication between the second base station and the mobile station; and

a requesting unit configured to request to transmit the data from the second base station to the mobile station on based on the result of the comparison by the determination unit.

4. The radio communication system of claim 1, the first base station further comprising:

a determination unit configured to determine contents of the data in accordance with comparison a first communication quality information with a second communication quality information, the first communication quality information indicating quality of communication between the first base station and the mobile station, the second communication quality information indicating quality of communication between the second base station and the mobile station; and

a requesting unit configured to request to transmit the data from the second base station to the mobile station based on the result of the comparison by the determination unit.

5. A radio communication method for a first base station and a second base station to communicate with a mobile station, the first base station for communicating with the mobile station in a first area, the second base station for communicating with the mobile station in a second area, a part of the second area being same with the first area, the radio communication method comprising:

transmitting the connection control information to the first base station, the connection control information including information indicating data to be sent from the second base station to the mobile station;

receiving connection control information from the second base station;

generating scheduling information for deciding whether the data sent to the mobile station is sent from the first base station or not, on the basis of the received connection control information and a communication resource that can be used to send data from the first base station to the mobile station;

transmitting the generated scheduling information to the second base station and transmitting the data decided to send to the mobile station on the basis of the scheduling information;

receiving the scheduling information from the first base station; and

transmitting the data decided to send from the second base station to the mobile station based on the scheduling information.