METHOD AND DEVICE FOR ALLOCATING BACKHAUL LINK RESOURCE

• US 20130163485A1
• Filed: 02/21/2013
• Published: 06/27/2013
• Est. Priority Date: 08/23/2010
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Wan, Lei, Ma, Sha, Yu, Yinghui, Bai, Wei
• Granted Patent: US 9,345,022 B2
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/27 between access points
• CPC Class Codes: H04W 92/20 between access points

Abstract

Embodiments of the present invention provide a method and a device for allocating a backhaul link resource. The method includes: selecting, by a first base station, at least one subframe in an uplink (UL) frequency band in a frequency division duplex (FDD) wireless communication system; and allocating the selected at least one subframe as a backhaul link resource between the first base station and a second base station. With the method, the device and the system for allocating a backhaul link resource according to the embodiments of the present invention, a subframe is selected in an unexhausted frequency band in existing bandwidth resources and allocated to a wireless backhaul link. Therefore, the existing bandwidth resources are released, resources are allocated to wireless backhaul links, and costs of the communication system are saved.

Claims

1. A method for allocating a backhaul link resource, comprising:

selecting, by a first base station, at least one subframe in an uplink UL frequency band in a frequency division duplex FDD wireless communication system; and

allocating the selected at least one subframe as a backhaul link resource between the first base station and a second base station.

2. The method according to claim 1, wherein:

before the selecting, by a first base station, at least one subframe in an UL frequency band in an FDD wireless communication system, the method comprises;

obtaining resource requirement information about an uplink access link resource and a backhaul link resource to be allocated;

searching, among a set collection of UL frequency band resource configuration schemes, for an UL frequency band resource configuration scheme that fulfills a resource requirement in the resource requirement information and a set requirement of hybrid automatic repeat request of the first base station; and

configuring the UL frequency band as inclusive of an uplink and a downlink subframe according to the UL frequency band resource configuration scheme.

3. The method according to claim 1, wherein the allocating the selected at least one subframe as a backhaul link resource between the first base station and a second base station comprises one of:

allocating the selected at least one subframe to an uplink or downlink backhaul link resource;

or

allocating at least one of selected at least two subframes to uplink backhaul link resources, and allocating remaining subframes in the at least two subframes to downlink backhaul link resources.

4. The method according to claim 1, wherein:

an uplink subframe and a downlink subframe are configured in the UL frequency band in the FDD wireless communication system, and the uplink subframe and the downlink subframe in the UL frequency band in the FDD wireless communication system fulfill a TDD configuration.

5. The method according to claim 1, wherein:

before allocating the selected at least one subframe as a backhaul link resource between the first base station and a second base station, the method comprises;

selecting, by the first base station, at least one subframe in a downlink DL band in the FDD wireless communication system.

6. The method according to claim 5, wherein the allocating the selected at least one subframe as a backhaul link resource between the first base station and a second base station comprises:

using at least one subframe selected in the UL frequency band in the frequency division duplex FDD system as an uplink backhaul link resource; and

using at least one subframe selected in the DL frequency band in the frequency division duplex FDD system as a downlink backhaul link resource.

7. The method according to claim 6, wherein:

the subframe of the uplink backhaul link resource and the subframe of the downlink backhaul link resource in the FDD wireless communication system fulfill a TDD configuration on a time domain.

8. The method according to claim 5, wherein:

before allocating the selected at least one subframe as a backhaul link resource between the first base station and a second base station, the method comprises;

allocating at least one subframe in the UL frequency band in the FDD system as a downlink access link resource of the second base station and allocating at least one subframe in the UL frequency band as an uplink access link resource of the second base station according to the resource configuration scheme, wherein

the subframe allocated as the downlink access link resource and the uplink access link resource in the UL frequency band of the FDD system fulfill a time division duplex TDD configuration.

9. The method according to claim 8, wherein:

if the uplink backhaul link resource and the downlink access link resource comprise a same subframe, the method comprises;

multiplexing the same subframe through time-domain, frequency-domain or time-frequency domain resource blocks.

10. The method according to claim 9, wherein:

the downlink subframe allocated to the downlink backhaul link resource in the DL frequency band is a part or all of a downlink subframe that correspond to an uplink subframe on a time domain, wherein the uplink subframe is allocated to the uplink access link resource of the second base station in the UL frequency band.

11. The method according to claim 5, wherein:

before the first base station selects at least one subframe in a downlink DL frequency band in an FDD wireless communication system and the first base station selects at least one subframe in an uplink UL frequency band in an FDD wireless communication system, the method comprises;

obtaining resource requirement information about an uplink and a downlink access link resource and a backhaul link resource to be allocated;

searching, among a set collection of frequency band resource configuration schemes, for an frequency band resource configuration scheme that fulfills a resource requirement in the resource requirement information and a set requirement of hybrid automatic repeat request of the first base station; and

configuring the uplink and the downlink subframe of the UL frequency band according to the frequency band resource configuration scheme.

12. A device for allocating a backhaul link resource, comprising:

a first selecting module, located in a first base station, and configured to select at least one subframe in an uplink UL frequency band in a frequency division duplex FDD wireless communication system; and

a first allocating module, configured to allocate the selected at least one subframe as a backhaul link resource between the first base station and a second base station.

13. The device according to claim 12, comprising:

a first obtaining module, configured to obtain resource requirement information about an uplink access link resource and a backhaul link resource to be allocated;

a first searching module, configured to search, among a set collection of UL frequency band resource configuration schemes, for an UL frequency band resource configuration scheme that fulfills a resource requirement in the resource requirement information and a set requirement of hybrid automatic repeat request of the first base station; and

a first configuring module, configured to configure the UL frequency band as inclusive of an uplink and a downlink subframe according to the UL frequency band resource configuration scheme.

14. The device according to claim 12, wherein the first allocating module is configured to allocate one of:

the selected at least one subframe as an uplink or downlink backhaul link resource;

or

at least one of selected at least two subframes as uplink backhaul link resources, and allocate remaining subframes in the at least two subframes as downlink backhaul link resources.

15. The device according to claim 12, wherein:

an uplink subframe and a downlink subframe are configured in the UL frequency band in the FDD wireless communication system, and the uplink subframe and the downlink subframe in the UL frequency band in the FDD wireless communication system fulfill a TDD configuration.

16. The device according to claim 12, further comprising:

a second selecting module, located in the first base station, and configured to select at least one subframe in a downlink DL frequency band in the FDD wireless communication system.

17. The device according to claim 16, wherein the allocating module is configured to:

allocate at least one subframe selected in the UL frequency band in the frequency division duplex FDD system as an uplink backhaul link resource; and

allocate at least one subframe selected in the DL frequency band in the frequency division duplex FDD system as a downlink backhaul link resource.

18. The device according to claim 17, wherein:

the subframe of the uplink backhaul link resource and the subframe of the downlink backhaul link resource in the FDD wireless communication system fulfill a TDD configuration on a time domain.

19. The device according to claim 16, further comprising:

a second allocating module, configured to allocate at least one subframe in the UL frequency band in the FDD system as a downlink access link resource of the second base station and allocate at least one subframe in the UL frequency band as an uplink access link resource of the second base station according to the resource configuration scheme, wherein

the subframe allocated as the downlink access link resource and the uplink access link resource in the UL frequency band of the FDD system fulfill a time division duplex TDD configuration.

20. The device according to claim 19, wherein:

if the uplink backhaul link resource and the downlink access link resource comprise a same subframe, the device further comprises;

a multiplexing module, configured to multiplex the same subframe through time-domain, frequency-domain or time-frequency domain resource blocks.