BASE STATION DEVICE, MOBILE STATION DEVICE, AND COMMUNICATION CONTROL METHOD

• US 20130003597A1
• Filed: 03/29/2011
• Published: 01/03/2013
• Est. Priority Date: 03/30/2010
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Fukumasa, Hidenobu, Fukumoto, Shusaku, Takehana, Shuichi, Sugahara, Shiro
• Granted Patent: US 8,811,221 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0035 evaluation of received explicit signalling
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04L 2001/0097 Relays
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

A base station device communicates with a mobile station device, either directly or via a relay station device. The base station device includes: a reference signal transmission instruction unit configured to instruct the mobile station device to transmit a reference signal; and a reference signal measurement instruction unit configured to instruct the relay station device to measure the reference signal that is transmitted by the mobile station device.

Claims

1. A base station device communicating with a mobile station device, either directly or via a relay station device, the base station device comprising:

a reference signal transmission instruction unit configured to instruct the mobile station device to transmit a reference signal; and

a reference signal measurement instruction unit configured to instruct the relay station device to measure the reference signal that is transmitted by the mobile station device.

2. The base station device according to claim 1, comprising a quality information receiving unit configured to receive information that indicates a receiving quality at the relay station device and that indicates the measurement result with respect to the instruction from the reference signal measurement instruction unit.

3. The base station device according to claim 2, comprising:

an up access link quality measurement unit configured to measure the reference signal transmitted by the mobile station device;

a difference calculation unit configured to calculate a difference between information that indicates the receiving quality at the relay station device received by the quality information receiving unit and information that indicates the receiving quality of a reference signal measured by the up access link quality measurement unit.

4. The base station device according to claim 3, comprising a difference transmission unit configured to notify the mobile station device of the difference that is calculated by the difference calculation unit.

5. The base station device according to claim 2, comprising:

a correction value calculation unit, based on the difference that is calculated by the difference calculation unit, configured to calculate a correction value of information that indicates the receiving quality at the mobile station device.

6. The base station device according to claim 5, wherein the information that indicates the receiving quality at the mobile station device is channel quality information.

7. The base station device according to claim 2, wherein the difference is a difference of a signal-to-interference-plus-noise power ratio.

8. The base station device according to claim 2, wherein the difference is a difference of a received power.

9. A mobile station device communicating with a base station device, either directly or via a relay station device, the mobile station device comprising:

a down direct link quality measurement unit configured to measure a reference signal that is transmitted by the base station;

a reference signal transmission unit configured to transmit a reference signal;

a difference receiving unit configured to receive difference information from the base station device; and

a receiving quality calculation unit configured to calculate information that indicates the receiving quality at its own device, using the measurement result at the down direct link quality measurement unit and the difference information received by the difference receiving unit.

10. The mobile station device according to claim 9, wherein the difference information is information indicating a difference between information that indicates a receiving quality at the relay station device calculated using the reference signal transmitted by the reference signal transmission unit and information that indicates the receiving quality at the base station device calculated using the reference signal transmitted by the reference signal transmission unit.

11. The mobile station device according to claim 9, wherein the difference information is information indicating a difference between a signal-to-interference-plus-noise power ratio at the relay station device calculated using the reference signal transmitted by the reference signal transmission unit and a signal-to-interference-plus-noise power ratio at the base station device calculated using the reference signal that is transmitted by the reference signal transmission unit.

12. The mobile station device according to claim 9, wherein the difference information is information indicating a difference between a received power at the relay station device calculated using the reference signal that is transmitted by the reference signal transmission unit and a received power at the base station device calculated using the reference signal transmitted by the reference signal transmission unit.

13. A communication control method in a communication system comprising a base station device, a relay station device, and a mobile station device communicating with the base station device, either directly or via the relay station device, the communication control method comprising:

instructing, by a reference signal transmission instruction unit, the mobile station device to transmit a reference signal;

instructing, by a reference signal measurement instruction unit, the relay station device to measure the reference signal transmitted by the mobile station device;

measuring, by an up access link quality measurement unit, the reference signal transmitted to the base station device from the mobile station device;

calculating, by a difference calculation unit, a difference between information that indicates a receiving quality at the relay station device, which is information of the measurement result with respect to the instruction by the reference signal measurement instruction unit and information indicating a receiving quality of the reference signal measured by the up access link quality measurement unit;

measuring, by a down direct link quality measurement unit, the reference signal transmitted to the mobile station device from the base station device; and

calculating, by a receiving quality calculation unit, information indicating the receiving quality at its own device, using the measurement result by the down direct link quality measurement unit and difference calculated by the difference calculation unit.

14. A communication control method in a communication system comprising a base station device, a relay station device, and a mobile station device communicating with the base station device, either directly or via the relay station device, the communication control method comprising:

instructing, by a reference signal transmission instruction unit, the mobile station device to transmit a reference signal;

instructing, by a reference signal measurement instruction unit, the relay station device to measure the reference signal transmitted by the mobile station device;

measuring, by an up access link quality measurement unit, the reference signal transmitted to the base station device from the mobile station device;

calculating, by a difference calculation unit, a difference between information indicating a receiving quality at the relay station device, which is information of the measurement result with respect to the instruction from the reference signal transmission instruction unit and information indicating a receiving quality of the reference signal measured at the up access link quality measurement unit;

calculating, by a correction value calculation unit, based on the difference calculated by the difference calculation unit, a correction value of information indicating the receiving quality at the mobile station device;

measuring, by a down direct link quality measurement unit, the reference signal transmitted to the mobile station device from the base station device; and

calculating, by a receiving quality calculation unit, information indicating the receiving quality at the mobile station device, using the measurement result by the down direct link quality measurement unit and the difference calculated by the correction value calculation unit.