Base station, relay station, and method

• US 8,913,949 B2
• Filed: 04/06/2012
• Issued: 12/16/2014
• Est. Priority Date: 10/07/2009
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Ando, Kazuaki, Shimomura, Tsuyoshi, Seki, Hiroyuki
• Primary Examiner(s): Pan, Yuwen
• Assistant Examiner(s): SHERIF, FATUMA G
• Application Number:
  US13/441,484
• Publication Number:
  US 20120244796A1
• Time in Patent Office: 984 Days
• Field of Search: 455/7, 455/509, 455/561
• US Class Current: 455/7
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

A base station is connected to a relay station that relays wireless signals from a mobile station. The base station includes a resource block assigning unit configured to generate first resource block assignment information of a first wireless section based on a first propagation quality of the first wireless section between the base station and the relay station; a ratio determining unit configured to calculate a ratio of a number of first resource blocks assigned to the first wireless section and a number of second resource blocks to be assigned to a second wireless section for transmitting the number of first resource blocks in the second wireless section between the relay station and the mobile station; and a transmitting unit configured to transmit the first resource block assignment information and the ratio to the relay station.

Claims

1. A base station connected to a relay station that relays wireless signals from a mobile station, the base station comprising:

a resource block assigning unit configured to generate first resource block assignment information of a first wireless section between the bases station and the relay station based on a first propagation quality of the first wireless section;

a ratio determining unit configured to calculate a ratio between a number of first resource blocks assigned to the first wireless section and a number of second resource blocks to be assigned to a second wireless section between the relay station and the mobile station; and

a transmitting unit configured to transmit the first resource block assignment information and the ratio to the relay station.

2. The base station according to claim 1, wherein

the number of first resource blocks is calculated based on the first propagation quality, and

the number of second resource blocks is calculated based on a second propagation quality of the second wireless section.

3. The base station according to claim 1, wherein

the number of first resource blocks is calculated based on the first resource block assignment information, and

the number of second resource blocks is calculated based on a second propagation quality of the second wireless section.

4. The base station according to claim 1, wherein

the first resource block assignment information is created by selecting resource blocks starting from a resource block having a highest first propagation quality, or by selecting resource blocks having the first propagation quality that is higher than a predetermined value.

5. A resource assigning method performed at a base station connected to a relay station that relays wireless signals from a mobile station, the resource assigning method comprising:

generating first resource block assignment information of a first wireless section between the base station and the relay station based on a first propagation quality of the first wireless section;

calculating a ratio between a number of first resource blocks assigned to the first wireless section and a number of second resource blocks to be assigned to a second wireless section between the relay station and the mobile station; and

transmitting the first resource block assignment information and the ratio to the relay station.

6. A relay station for relaying wireless signals from a mobile station to a base station, the relay station comprising:

a receiving unit configured to receive data; and

a resource block assigning unit configured to generate resource block assignment information, wherein

the receiving unit receives, from the base station,

first resource block assignment information of a first wireless section between the base station and the relay station based on a first propagation quality of the first wireless section, and

a ratio between a number of first resource blocks assigned to the first wireless section and a number of second resource blocks to be assigned to a second wireless section between the relay station and the mobile station, wherein

the resource block assigning unit generates second resource block assignment information of the second wireless section based on the first resource block assignment information and the ratio.

7. An operation method performed by a relay station for relaying wireless signals from a mobile station to a base station, the operation method comprising:

receiving, from the base station,

first resource block assignment information of a first wireless section between the base station and the relay station based on a first propagation quality of the first wireless section, and

a ratio between a number of first resource blocks assigned to the first wireless section and a number of second resource blocks to be assigned to a second wireless section between the relay station and the mobile station; and

generating second resource block assignment information of the second wireless section based on the first resource block assignment information and the ratio.

8. A relay station for relaying communication from a mobile station to a base station, the relay station comprising:

a receiving unit configured to receive first resource block assignment information of a first wireless section between the base station and the relay station;

a ratio determining unit configured to calculate a ratio between a number of first resource blocks assigned to the first wireless section and a number of second resource blocks to be assigned to a second wireless section between the relay station and the mobile station; and

a resource block assigning unit configured to generate second resource block assignment information of the second wireless section based on the first resource block assignment information and the ratio.

9. The relay station according to claim 8, wherein

the number of first resource blocks is calculated based on a first propagation quality of the first wireless section, and

the number of second resource blocks is calculated based on a second propagation quality of the second wireless section.

10. The relay station according to claim 8, wherein

the number of first resource blocks is calculated based on the first resource block assignment information, and

the number of second resource blocks is calculated based on a second propagation quality of the second wireless section.

11. The relay station according to claim 8, wherein

the first resource block assignment information is created by selecting resource blocks starting from a resource block having a highest first propagation quality of the first wireless section, or by selecting resource blocks having the first propagation quality that is higher than a predetermined value.

12. An operation method performed by a relay station for relaying wireless signals from a mobile station to a base station, the operation method comprising:

receiving first resource block assignment information of a first wireless section between the base station and the relay station;

calculating a ratio between a number of first resource blocks assigned to the first wireless section and a number of second resource blocks to be assigned to a second wireless section between the relay station and the mobile station; and

generating second resource block assignment information of the second wireless section based on the first resource block assignment information and the ratio.