Relay station, base station and communication system

• US 20080045141A1
• Filed: 05/15/2007
• Published: 02/21/2008
• Est. Priority Date: 08/17/2006
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Suga, Junichi
• Granted Patent: US 9,270,361 B2
• Time in Patent Office: Days
• US Class Current: 455/7
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

The present invention utilizes a relay station operable to receive, from a base station, a first signal to control transmitting operation of a mobile station and operable to receive a second signal transmitted from said mobile station in accordance with the first signal. The relay station comprises a control unit to generate a control signal affecting said first signal and control transmission of said control signal to said base station, and a reception processing part to receive a radio signal transmitted from said mobile station which transmits said radio signal in accordance with said first signal which is affected by said control signal.

Claims

1. A relay station operable to receive, from a base station, a first signal to control a transmitting operation of a mobile station and operable to receive a second signal transmitted from said mobile station in accordance with said first signal, said relay station comprising:

a control unit to generate a control signal affecting said first signal and control transmission of said control signal to said base station, and

a reception processing part to receive a radio signal transmitted from said mobile station which transmits said radio signal in accordance with said first signal which is affected by said control signal.

2. The relay station according to claim 1, wherein the first signal includes information of radio frame format.

3. The relay station according to claim 1, wherein said transmitting operation includes transmission of a result of measurement of receiving quality.

4. A base station operable to transmit a first signal to control transmitting operation of a mobile station and operable to receive, via a relay station, a radio signal transmitted from said mobile station which transmits said radio signal in accordance with the first signal, the base station comprising:

a reception processing part to receive a control signal from said relay station, and

a control unit to generate said first signal on the basis of said control signal and controls transmission of said first signal.

5. A relay station operable to receive, from a base station, a first signal to control receiving operation of a mobile station and transmitting a radio signal to said mobile station, said relay station comprising:

a control unit to generate a control signal affecting said first signal and controls transmission of the control signal to said base station, and

a transmission processing part for transmitting a radio signal to said mobile station on the basis of said first signal which is affected by said control signal.

6. A base station operable to transmit a first signal to control receiving operation of a mobile station and operable to transmit, via a relay station, a radio signal to said mobile station which executes receiving operation in accordance with said first signal, said base station comprising:

a reception processing part to receive a control signal from said relay station, and

a control unit to generate said first signal which is affected by said control signal and control transmission of said first signal affected by said control signal.

7. A relay station operable to receive, from a base station, a first signal to control receiving operation of a mobile station and operable to transmit data received from said base station to said mobile station on the basis of said first signal, said relay station comprising:

a control unit to generate a control signal when an error is detected in said data received from said base station and control to transmit said control signal to said base station,

a reception processing part to receive retransmission data in relation with re-transmission of said data from said base station, and

a transmission processing part to transmit, to said mobile station, said received retransmission data on the basis of said first signal reflecting said control signal.

8. A relay station operable to receive, from a base station, a first signal to control receiving operation of a mobile station and operable to transmit data received from said base station to said mobile station, said relay station comprising:

a storage unit to store said data received from said base station,

a control unit to generate a control signal when an error is not detected in said data received but a signal indicating detection of error in said data is received from said mobile station, which receives said data from said relay station, and transmit said control signal to said base station, and

a transmission processing part to generate a re-transmission data by using said data stored in said storage unit and transmit said re-transmission data to said mobile station on the basis of said first signal based on said control signal.

9. A base station operable to transmit a first signal to control receiving operation of a mobile station and operable to transmit data to said mobile station via a relay station, said base station comprising:

a reception processing part to receive, from said relay station, a control signal which is generated and transmitted from said relay station when an error is detected in said received data in said relay station, and

a transmission processing part to transmit re-transmission data in relation to re-transmission of said data via said relay station to said mobile station.

10. A base station operable to transmit a first signal to control receiving operation of a mobile station and operable to transmit data to said mobile station via a relay station, said base station comprising:

a reception processing part to receive, from said relay station, a control signal which is generated and transmitted from said relay station when an error is not detected in said received data in said relay station but an error is detected in said data received in said mobile station, and

a transmission processing part to generate said first signal on the basis of said control signal and transmit said first signal to control receiving operation of said mobile station but not transmitting data in relation to re-transmission of said data to said relay station.

11. A method of relaying signals in a relay station comprising:

receiving, from a base station, a first signal to control a transmitting operation of a mobile station;

receiving a second signal transmitted from said mobile station in accordance with said first signal;

generating a control signal affecting first signal;

controlling transmission of said control signal to said base station, and

receiving a radio signal transmitted from said mobile station which transmits said radio signal in accordance with said first signal which is affected by said control signal.

12. The method according to claim 11, wherein the first signal includes information of radio frame format.

13. The method according to claim 11, wherein said transmitting operation includes transmission of a result of measurement of receiving quality.

14. A method of base station operation comprising:

transmitting a first signal to control transmitting operation of a mobile station;

receiving, via a relay station, a radio signal transmitted from said mobile station which transmits said radio signal in accordance with the first signal;

receiving a control signal from said relay station; and

generating said first signal based on said control signal and controlling transmission of said first signal.

15. A method of relaying signals in a relay station comprising:

receiving, from a base station, a first signal to control receiving operation of a mobile station;

transmitting a radio signal to said mobile station;

generating a control signal affecting said first signal;

controlling transmission of the control signal to said base station, and

transmitting a radio signal to said mobile station based on said first signal which is affected by said control signal.

16. A method of base station operation comprising:

transmitting a first signal to control receiving operation of a mobile station;

transmitting, via a relay station, a radio signal to said mobile station which executes a receiving operation in accordance with said first signal;

receiving a control signal from said relay station; and

generating said first signal based on said control signal and controlling transmission of said first signal based on said control signal.

17. A method of relaying signals in a relay station comprising:

receiving, from a base station, a first signal to control receiving operation of a mobile station;

transmitting data received from said base station to said mobile station based on said first signal, said relay station;

generating a control signal when an error is detected in said data received from said base station and controlling to transmit said control signal to said base station;

receive retransmission data related to re-transmission of said data from said base station; and

transmitting, to said mobile station, said received retransmission data on the basis of said first signal which is affected by said control signal.

18. A method of relaying signals in a relay station comprising:

receiving, from a base station, a first signal to control a receiving operation of a mobile station;

transmitting data received from said base station to said mobile station;

storing said data received from said base station;

generating a control signal when an error is not detected in said data received but a signal indicating detection of error in said data is received from said mobile station, which receives said data from said relay station, and transmitting said control signal to said base station; and

generating a re-transmission data by using said data stored in said storage unit and transmitting said re-transmission data to said mobile station on the basis of said first signal which is affected by said control signal.

19. A method of base station operation comprising:

transmitting a first signal to control a receiving operation of a mobile station;

transmitting data to said mobile station via a relay station

receiving, from said relay station, a control signal which is generated and transmitted from said relay station when an error is detected in said received data in said relay station; and

transmitting re-transmission data in relation to re-transmission of said data via said relay station to said mobile station.

20. A method of base station operation comprising:

transmitting a first signal to control receiving operation of a mobile station;

transmitting data to said mobile station via a relay station

receiving, from said relay station, a control signal which is generated and transmitted from said relay station when an error is not detected in said received data in said relay station but an error is detected in said data received in said mobile station; and

generating said first signal on the basis of said control signal and transmitting said first signal to control receiving operation of said mobile station but not transmitting data in relation to re-transmission of said data to said relay station.