Method and device for allocating backhaul link resource

• US 9,345,022 B2
• Filed: 02/21/2013
• Issued: 05/17/2016
• 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
• Primary Examiner(s): Russell, Wanda Z
• Application Number:
  US13/773,296
• Publication Number:
  US 20130163485A1
• Time in Patent Office: 1,181 Days
• Field of Search: 370/330
• US Class Current: 1/1
• 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:

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

searching, among a set collection of an uplink (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;

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

selecting, by a first base station, at least two subframes in the UL frequency band in a frequency division duplex (FDD) wireless communication system; and

allocating at least one subframe in the at least two subframes as a downlink backhaul link subframe between the first base station and a second base station, and at least one subframe in the at least two subframes as uplink backhaul link subframe between the first base station and a second base station;

wherein the at least one uplink backhaul link subframe in the UL frequency band in the FDD wireless communication system and the at least one downlink backhaul link subframe in the UL frequency band in the FDD wireless communication system comply with an existing time division duplexing (TDD) time relationship in a long term evolution (LTE) system.

2. The method according to claim 1, wherein in the TDD time relationship,

ACK or NACK of the at least one uplink backhaul link subframe is transmitted in one of the at least one downlink backhaul link subframe;

and

ACK or NACK of the at least one downlink backhaul link subframe is transmitted in one of the at least one uplink backhaul link subframe.

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

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;

configuring the uplink and the downlink subframe of an uplink (UL) frequency band according to the frequency band resource configuration scheme;

selecting, by a first base station, at least three subframes in the UL frequency band in a frequency division duplex (FDD) wireless communication system;

selecting, by the first base station, at least two subframes in a downlink (DL) band in the FDD wireless communication system;

allocating at least one of the at least three subframes in the UL frequency band in the FDD wireless communication system as an uplink backhaul link resource, allocating at least one of the at least three subframes in the UL frequency band in the FDD wireless communication system as a downlink access link resource of the second base station and allocating at least one of selected at least three subframes in the UL frequency band as an uplink access link subframe of the second base station according to a resource configuration scheme; and

allocating at least one subframe selected in the DL frequency band in the FDD wireless communication system as a downlink backhaul link resource,

wherein the at least one downlink access link subframe in the UL frequency band in the FDD wireless communication system and the at least one uplink access link subframe in the UL frequency band in the FDD wireless communication system comply with an existing time division duplexing (TDD) time relationship in a long term evolution (LTE) system.

4. The method according to claim 3, 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.

5. The method according to claim 3, 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.

6. The method according to claim 5, 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.

7. 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 two subframes in an uplink (UL) frequency band in a frequency division duplex (FDD) wireless communication system;

a first allocating module, configured to at least one subframe in the at least two subframes as a downlink backhaul link subframe between the first base station and a second base station, and at least one subframe in the at least two subframes as uplink backhaul link subframe between the first base station and a second base station;

wherein;

the at least one uplink backhaul link subframe in the UL frequency band in the FDD wireless communication system and the at least one downlink backhaul link subframe in the UL frequency band in the FDD wireless communication system comply with an existing time division duplexing (TDD) time relationship in a long term evolution (LTE) system;

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.

8. The device according to claim 7, wherein in the TDD time relationship,

ACK or NACK of the at least one uplink backhaul link subframe is transmitted in one of the at least one downlink backhaul link subframe;

and

ACK or NACK of the at least one downlink backhaul link subframe is transmitted in one of the at least one uplink backhaul link subframe.

9. 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 three subframes in an uplink (UL) frequency band in a frequency division duplex (FDD) wireless communication system;

a second selecting module, located in the first base station, and configured to select at least two subframes in a downlink (DL) frequency band in the FDD wireless communication system;

a first allocating module, located in the first base station, configured to allocate at least one of the at least three subframes selected in the UL frequency band in the FDD wireless communication system as an uplink backhaul link resource; and

allocate at least one subframe selected in the DL frequency band in the FDD wireless communication system as a downlink backhaul link resource;

a second allocating module, located in the first base station, configured to allocate at least one of the selected at least three subframes in the UL frequency band in the FDD wireless communication system as a downlink access link resource of the second base station and allocate at least one of the selected at least three subframes in the UL frequency band as an uplink access link resource of the second base station according to a resource configuration scheme,

wherein the at least one downlink access link subframe in the UL frequency band in the FDD wireless communication system and the at least one uplink access link subframe in the UL frequency band in the FDD wireless communication system comply with an existing time division duplexing (TDD) time relationship in a long term evolution (LTE) system;

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

a searching module, configured to search, among a set collection of frequency band resource configuration schemes, for a 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 configuring module, configured to configure the uplink and the downlink subframe of the UL frequency band according to the frequency band resource configuration scheme.

10. The device according to claim 9, 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.

11. The device according to claim 9, 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.

12. The device according to claim 11, 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 subframes is allocated to the uplink access link resource of the second base station in the UL frequency band.