CN101867944B

CN101867944B - Method and system for scheduling resources, evolved node B (eNB) and relay node (RN)

Info

Publication number: CN101867944B
Application number: CN200910082030A
Authority: CN
Inventors: 张文健; 潘学明; 沈祖康; 肖国军; 王立波
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2009-04-17
Filing date: 2009-04-17
Publication date: 2012-10-03
Anticipated expiration: 2029-04-17
Also published as: CN101867944A

Abstract

The invention discloses a method and a system for scheduling resources. The method comprises the following steps that: an evolved node B (eNB) configures an uplink subframe, which is used for performing uplink transmission of a backhaul link, for a relay node (RN) and notifies to the RN; and the RN receives a notification message and does not perform uplink scheduling on user equipment (UE) in the uplink subframe. The invention also discloses the eNB and the RN. Due to the application of the method, the system and the device, resource conflict can be avoided.

Description

Resource scheduling method and system, base station and relay node

Technical Field

The present invention relates to mobile communication technologies, and in particular, to a resource scheduling method and system, a base station, and a relay node.

Background

The introduction of Relay nodes (RN, Relay Node) has enabled three radio links to appear in Relay-based mobile communication systems, namely: an eNB-macro UE direct link (direct link), an eNB-RN backhaul link (backhaul link), and an RN-relay UE access link (access link), which are hereinafter referred to as the direct link, the backhaul link, and the access link, respectively. The transceiver of the RN adopts a Time Division Duplex (TDD) operation mode, i.e., receiving and transmitting cannot be performed simultaneously.

The backhaul link and the access link may use the same frequency spectrum, but since the transmitter of the RN interferes with its receiver (unless sufficient isolation is provided for incoming and outgoing signals), the downlink backhaul link and the downlink access link are generally not suitable for simultaneous presence on the same frequency resource, and vice versa. In order to avoid the above interference, the following processing methods are generally adopted in the prior art: if the RN receives data from a base station (eNB), the RN does not transmit the data to the UE, namely, a 'gap' is created by using a Multicast/Broadcast over a Single frequency Network (MBSFN) subframe in the downlink access transmission time. Fig. 1 is a schematic diagram of a conventional relay link downlink transmission using MBFSN subframes. As shown in fig. 1, in the "gap", the RN will only receive data from the eNB, and will not transmit data to the UE; "Ctrl" is used for RN to send control signaling to UE, i.e. to schedule UE.

Although the method shown in fig. 1 solves the interference problem, it also brings new problems, such as:

fig. 2 is a schematic diagram of a conventional resource scheduling method. As shown in fig. 2, in subframe # n, the UE receives a Physical Downlink Control Channel (PDCCH) from the RN, where the PDCCH carries uplink scheduling information of the RN for the UE in subframe # n + k, and accordingly, the UE sends a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH) to the RN in subframe # n + k; after the RN sends the PUCCH to the UE, the RN receives the R-PDSCH and the R-PDCCH which are sent to the RN by the eNB, wherein the R-PDSCH and the R-PDCCH carry uplink scheduling information of the RN by the eNB in a subframe # n + k, and correspondingly, the RN sends the R-PUCCH and the R-PUSCH in the subframe # n + k; this results in resource conflict when the RN performs both transmission and reception operations for the eNB and UE in the same subframe.

Disclosure of Invention

In view of the above, the present invention mainly aims to provide two resource scheduling manners, which can avoid resource conflict.

Another object of the present invention is to provide a resource scheduling system, which can avoid resource conflicts.

It is still another object of the present invention to provide a base station, which can avoid resource collision.

It is still another object of the present invention to provide a relay node, which can avoid resource collision.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a resource scheduling method comprises the following steps:

and the base station eNB configures an uplink subframe for the relay node RN for carrying out backhaul uplink transmission and informs the RN so that the RN does not carry out uplink scheduling on the user equipment UE in the uplink subframe.

A resource scheduling system, comprising:

a base station eNB, configured to configure, for a relay node RN, an uplink subframe for backhaul link uplink transmission, and notify the RN;

and the RN is used for receiving the notification message from the eNB and not carrying out uplink scheduling on the User Equipment (UE) in the uplink subframe.

A base station, eNB, comprising:

a configuration unit, configured to configure, for a relay node RN, an uplink subframe for backhaul link uplink transmission, so that the RN does not perform uplink scheduling on a user equipment UE in the uplink subframe;

and the notifying unit is used for notifying the RN of the configured uplink subframe.

A relay node, RN, comprising:

a receiving unit, configured to receive a notification message from a base station eNB, where the notification message carries an uplink subframe configured by the eNB for the RN and used for backhaul link uplink transmission;

and the control unit is used for not carrying out uplink scheduling on the user terminal UE in the uplink subframe.

Therefore, by adopting the technical scheme of the invention, the eNB informs the RN of the uplink subframe which is configured to the RN and used for carrying out backhaul link uplink transmission in advance, so that the RN can not carry out uplink scheduling on the UE in the configured uplink subframe in the subsequent process, thereby avoiding resource conflict.

Drawings

Fig. 1 is a schematic diagram of a conventional relay link downlink transmission using MBFSN subframes.

Fig. 2 is a schematic diagram of a conventional resource scheduling method.

FIG. 3 is a flow chart of an embodiment of the method of the present invention.

Fig. 4 is a diagram illustrating a frame structure of an RN based on TDD configuration 2 in an embodiment of the present invention.

Fig. 5 is a diagram illustrating a frame structure of an RN based on TDD configuration 6 in an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of the system according to the embodiment of the present invention.

Fig. 7 is a schematic structural diagram of an eNB according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of an RN according to an embodiment of the present invention.

Detailed Description

Aiming at the problems in the prior art, the invention provides a brand-new resource scheduling scheme which comprises the following steps: before the RN initially accesses the network and does not start actual communication, the eNB informs the RN of an uplink subframe which is configured to the RN and used for backhaul uplink transmission, so that the RN can not perform uplink scheduling on the UE in the configured uplink subframe in the subsequent process, and resource conflict is avoided.

Although the interference problem can be solved by using the method shown in fig. 1, how the RN knows which subframe is used as the MBSFN subframe is not clear in the prior art. In the scheme of the invention, the eNB can be specified to configure the RN with the downlink subframe for carrying out backhaul link downlink transmission and inform the RN, and then the RN configures the downlink subframe into the MBSFN subframe according to the existing mode.

In practical application, the eNB may respectively notify the RN of the uplink subframe for backhaul uplink transmission and the downlink subframe for backhaul downlink transmission by using different messages, or may simultaneously notify the RN of the uplink subframe for backhaul uplink transmission and the downlink subframe for backhaul downlink transmission by using the same message, and a specific implementation manner is not limited.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings by way of examples.

FIG. 3 is a flow chart of an embodiment of the method of the present invention. In this embodiment, it is assumed that different messages are respectively notified to the RN for the uplink and downlink subframes configured to the RN. As shown in fig. 3, the method comprises the following steps:

step 301: and the eNB configures an uplink subframe for backhaul uplink transmission and a downlink subframe for backhaul downlink transmission for the RN, and informs the RN of the uplink subframe and the downlink subframe.

In this step, how the eNB configures, for the RN, an uplink subframe for backhaul uplink transmission and a downlink subframe for backhaul downlink transmission is prior art, and details are not repeated, and the following description focuses on a notification method:

in the prior art, there is a mature MBSFN subframe notification method, which is not applied between eNB and RN, and the notification method is a bitmap (bitmap) method, specifically including two methods:

A. single radio frame bitmap oneFrame BIT STRING (SIZE (6))

B. Four consecutive radio frames bitmap four BIT STRING (SIZE (24))

For a system using Frequency Division Duplex (FDD) mode, a subframe in each radio frame (including 10 subframes) that can be an MBSFN subframe includes: subframe 1, subframe 2, subframe 3, subframe 6, subframe 7, and subframe 8, which are denoted as #1, #2, #3, #6, #7, and #8, respectively, in the present embodiment, correspond to 6 bits of the bitmap, respectively.

For a system in TDD mode, the subframes that can be MBSFN subframes in each radio frame include: #3, #4, #7, #8, and #9, corresponding to the first 5bits of the bitmap, respectively, and the last 1 bit being unused; it should be noted that for TDD mode, the uplink subframe cannot be configured as an MBSFN subframe.

In this embodiment, by means of the existing notification manner, the eNB notifies the RN of the uplink subframe configured for backhaul uplink transmission and the downlink subframe configured for backhaul downlink transmission.

For the FDD mode, the uplink subframe for backhaul uplink transmission and the downlink subframe for backhaul downlink transmission may be different subframes or the same subframe, but in the TDD mode, the uplink subframe and the downlink subframe may be different subframes. For example, #2 has been configured as an uplink subframe for backhaul uplink transmission, then in FDD mode, #2 may also be further configured as a downlink subframe for backhaul downlink transmission, but in TDD mode, #2 may no longer be configured as a downlink subframe for backhaul downlink transmission.

In this embodiment, preferably, in the same manner as in the prior art, in the FDD mode, only #1, #2, #3, #6, #7 and #8 are allowed to be configured as downlink subframes for backhaul downlink transmission, that is, as MBSFN subframes, and in the TDD mode, only #3, #4, #7, #8 and #9 are allowed to be configured as MBSFN subframes. In addition, for an uplink subframe for backhaul uplink transmission, there is generally no limitation of which subframe only is allowed to be used, but preferably, #2, #3, #4, #7, and #8 may be used.

It should be noted that, in the solution of the present invention, for the configured uplink or downlink subframes, the positions of the uplink or downlink subframes in different radio frames may be configured to be the same position, for example, #3 in each radio frame is fixedly used as an uplink subframe for backhaul link uplink transmission; alternatively, a certain number, for example, M radio frames, may be configured to different positions as a period.

The following describes the above two cases in detail with TDD mode as an example:

1) in the first case:

the method for notifying the RN of the uplink subframe configured to the RN for backhaul uplink transmission by the eNB is as follows: the eNB sends a notification message comprising N bits to the RN, wherein N is a positive integer, the value of the notification message is the same as the number of subframes which can be used as uplink subframes of backhaul link uplink transmission in each wireless frame, and

preset

1 or 0 is used for representing the uplink subframes which are configured to the RN and used for backhaul link uplink transmission. The method for informing the RN of the downlink subframe configured to the RN for backhaul link downlink transmission by the eNB is as follows: the eNB sends a notification message comprising N bits to the RN, wherein N is a positive integer, the value of the notification message is the same as the number of the predetermined subframes which can be used as downlink subframes of backhaul link downlink transmission in each radio frame, and the predetermined 1 or 0 is used for representing the downlink subframes which are configured to the RN and used for the backhaul link downlink transmission.

As known in the art, the TDD mode may be specifically divided into 7 sub-modes, i.e., TDD configuration 0 to TDD configuration 6, according to the difference between the uplink and downlink configurations.

Fig. 4 is a diagram illustrating a frame structure of an RN based on TDD configuration 2 in an embodiment of the present invention. As shown in fig. 4, wherein "D" represents a downlink subframe, "U" represents an uplink subframe, and "S" represents a special subframe; "M" denotes an MBSFN subframe (i.e., a downlink subframe for backhaul downlink transmission), and "T" denotes an uplink subframe for backhaul uplink transmission. As can be seen, #3 in each radio frame is configured for a downlink subframe for backhaul downlink transmission, and #7 is configured for an uplink subframe for backhaul uplink transmission.

Assuming that the subframes that can be uplink subframes of backhaul uplink transmission are #2, #3, #4, #7 and #8, the value of N is 5, and assuming that 1 is used to represent the uplink subframe configured to the RN for backhaul uplink transmission, the notification message sent by the eNB to the RN in conjunction with fig. 4 can be represented as (because of the bitmap notification method and used to configure the uplink subframe, the notification message can be simply referred to as uplink bitmap):

and uplink bitmap: { #2, #3, #4, #7, #8}

{0，0，0，1，0}。

Similarly, if the subframes that can be used as downlink subframes for backhaul downlink transmission are assumed to be #3, #4, #7, #8 and #9, and it is assumed that 1 is used to indicate the downlink subframe configured to the RN for backhaul downlink transmission, then the notification message (abbreviated as downlink bitmap) sent to the RN in conjunction with fig. 4, eMB can be expressed as:

and downlink bitmap: { #3, #4, #7, #8, #9}

{1，0，0，0，0}。

2) In the second case:

for the configured downlink subframe for backhaul downlink transmission, the notification method is similar to that in 1), except that a bitmap is used to continuously indicate M radio frames.

Fig. 5 is a diagram illustrating a frame structure of an RN based on TDD configuration 6 in an embodiment of the present invention. As shown in fig. 5, if #9 is configured as a downlink subframe for backhaul downlink transmission, the downlink bitmap may be represented as:

{#3，#4，#7，#8，#9，#3，#4，#7，#8，#9，#3，#4，#7，#8，#9

#3，#4，#7，#8，#9，#3，#4，#7，#8，#9，#3，#4，#7，#8，#9}

{0，0，0，0，1，0，0，0，0，1，0，0，0，0，1，

0，0，0，0，1，0，0，0，0，1，0，0，0，0，1，}。

however, for the configured uplink subframe for backhaul uplink transmission, the eNB needs to generate a configuration table in advance, where the configuration table includes M options, which are numbered as option 1 to option M, respectively, and each option corresponds to its own configuration information, including: and each radio frame is configured with an uplink subframe for backhaul uplink transmission of the RN.

The eNB sends more than one notification message to the RN, each notification message corresponds to one option, each notification message comprises NxM bits, N is a positive integer, the value of N is the same as the number of subframes of an uplink subframe which can be used for backhaul uplink transmission in each wireless frame, and a preset 1 or 0 is used for representing the uplink subframe which is configured to the RN and used for backhaul uplink transmission in each wireless frame.

Assuming that the configuration table is (M takes a value of 6):

10ms

option

1

#2

#3

#4

#7

#8

N

Option

2

#3

#4

#7

#8

N

#

2

Option 3

#4

#7

#8

N

#

2

#3

Option 4

#7

#8

N

#

2

#3

#4

Option 5

#8

N

#

2

#3

#4

#7

Option 6

N

#

2

#3

#4

#7

#8

Table one configuration table when M takes the value 6

Wherein, each "10 ms" represents a radio frame; n denotes an uplink subframe not configured for backhaul uplink transmission within the 10 ms.

As can be seen, there are 6 configuration manners provided in the table one, where option 1 indicates that #2, #3, #4, #7 and #8 in the first to fifth radio frames are respectively configured as uplink subframes for backhaul uplink transmission, and option 2 indicates that #3, #4, #7, #8 and #2 in the first, second, third, fourth and sixth radio frames are respectively configured as uplink subframes for backhaul uplink transmission; the others are not described in detail.

Assuming that the eNB configures an uplink subframe for backhaul uplink transmission for the RN according to the first configuration manner, as shown in fig. 5, the notification message sent by the eNB to the RN may be represented as:

and uplink bitmap:

{#2，#3，#4，#7，#8，#2，#3，#4，#7，#8，#2，#3，#4，#7，#8

#2，#3，#4，#7，#8，#2，#3，#4，#7，#8，#2，#3，#4，#7，#8}

{1，0，0，0，0，0，1，0，0，0，0，0，1，0，0，

0，0，1，0，0，0，0，0，1，0，0，0，0，0，0}。

in practical applications, the eNB may select only one configuration mode, or may select multiple configuration modes simultaneously.

In addition, in order to save signaling overhead, other notification methods can also be adopted. Such as: assuming that the eNB only selects one configuration, option 1, then there are:

the table is saved in RN, eNB only needs to utilize 5bits to inform bitmap {1, 0, 0, 0, 0} corresponding to the first radio frame in RN option 1; and the RN acquires each uplink subframe which is configured in other radio frames in the option 1 and used for backhaul uplink transmission through a lookup table I.

Or, the eNB notifies the RN of only the number of option 1, and the RN obtains each configured uplink subframe for backhaul uplink transmission by looking up the first table.

Alternatively, other notification means are used, such as: pre-storing the HARQ timing relation in the RN; the eNB sends more than one notification message to the RN, the number of the notification messages is less than the number of uplink HARQ processes, and each notification message carries an uplink HARQ process number; and the RN inquires the HARQ timing relation corresponding to the HARQ process number carried in each notification message and acquires the configured uplink subframe for carrying out backhaul link uplink transmission according to the HARQ timing relation.

Step 302: the RN receives the notification message from the eNB, does not perform uplink scheduling on the UE in an uplink subframe for backhaul uplink transmission, configures a downlink subframe for backhaul downlink transmission as an MBSFN subframe, receives only data from the eNB in the MBSFN subframe, and does not transmit the data to the UE.

In this step, after receiving the bitmap from the eNB, the RN configures the corresponding downlink subframe as an MBSFN subframe, and reserves the corresponding uplink subframe for the uplink backhaul link. Within the reserved uplink subframe, the RN will not perform any uplink scheduling on the UE to avoid resource collision.

In the subsequent process, the eNB may further adjust the number of uplink subframes configured to the RN for backhaul uplink transmission and the number of downlink subframes configured to the RN for backhaul downlink transmission according to the data amount on the link between the eNB and the RN. The adjustment may be triggered by the eNB or the RN:

A. triggered by the eNB:

the eNB counts a Buffer Status Report (BSR) reported by the RN within a preset time, and adjusts the number of uplink subframes which are configured to the RN and used for carrying out backhaul link uplink transmission according to the BSR, namely if the Buffer status shows that the data volume to be sent to the eNB by the RN is large, the number of the uplink subframes configured to the RN is increased, otherwise, the number of the uplink subframes is reduced; meanwhile, the eNB counts the buffer state transmitted to the RN by the eNB within the preset time, and adjusts the number of downlink subframes which are configured to the RN and used for carrying out backhaul link downlink transmission according to the buffer state;

B. triggered by the RN:

the RN sends an adjustment request to the eNB according to the BSR condition reported to the eNB by the RN within preset time, the eNB requests to increase or decrease the required subframe number, and the eNB adjusts the uplink subframe number which is configured to the RN and used for carrying out backhaul link uplink transmission according to the adjustment request; meanwhile, the eNB counts the buffer state transmitted to the RN by the eNB within the preset time, and adjusts the number of downlink subframes which are configured to the RN and used for carrying out backhaul link downlink transmission according to the buffer state.

Based on the above method, fig. 6 is a schematic diagram of a composition structure of an embodiment of the system of the present invention. As shown in fig. 6, includes:

the eNB61 is configured to configure an uplink subframe for the RN62 to perform backhaul uplink transmission, and notify the RN62 of the uplink subframe;

and the RN62 is used for receiving the notification message from the eNB61 and not performing uplink scheduling on the UE in the uplink subframe.

The eNB61 may be further configured to configure a downlink subframe for backhaul downlink transmission for the RN62, and notify the RN 62;

the RN62 is further configured to receive a notification message from the eNB61, and configure the downlink subframe for backhaul downlink transmission as an MBSFN subframe.

Fig. 7 is a schematic structural diagram of an eNB according to an embodiment of the present invention. As shown in fig. 7, includes:

a configuring unit 71, configured to configure, for the RN, an uplink subframe for backhaul uplink transmission;

a notifying unit 72, configured to notify the RN of the configured uplink subframe.

The configuring unit 71 may be further configured to configure, for the RN, a downlink subframe for backhaul downlink transmission;

the notifying unit 72 is further configured to notify the RN of the configured downlink subframe.

In addition, the eNB shown in fig. 7 may further include:

an adjusting unit 73, configured to adjust, according to the data amount on the link between the eNB and the RN, an uplink subframe number configured to the RN for backhaul uplink transmission and a downlink subframe number configured to the RN for backhaul downlink transmission.

The adjusting unit 73 may specifically include:

a first adjusting subunit 731, configured to count BSRs reported by the RNs within a predetermined time, and adjust, according to the BSRs, the number of uplink subframes configured to the RNs for backhaul uplink transmission; or, receiving an adjustment request from the RN, and adjusting the number of uplink subframes configured to the RN for backhaul uplink transmission according to the adjustment request;

a second adjusting subunit 732, configured to count a buffer state transmitted by the eNB to the RN within a predetermined time, and adjust, according to the buffer state, a number of downlink subframes configured to the RN for performing backhaul link downlink transmission.

Fig. 8 is a schematic structural diagram of an RN according to an embodiment of the present invention. As shown in fig. 8, includes:

a receiving unit 81, configured to receive a notification message from an eNB, where the notification message carries an uplink subframe configured by the eNB for the RN and used for backhaul uplink transmission;

a control unit 82, configured to not perform uplink scheduling on the UE in the uplink subframe.

The receiving unit 81 may further be configured to receive a notification message from the eNB carrying a downlink subframe configured by the eNB for the RN and used for backhaul downlink transmission;

the control unit 82 is further configured to configure the downlink subframe for backhaul downlink transmission as an MBSFN subframe.

In addition, the RN shown in fig. 8 may further include:

a requesting unit 83, configured to send an adjustment request to the eNB according to a BSR condition reported by the RN to the eNB within a predetermined time, so that the eNB adjusts, according to the adjustment request, an uplink subframe number configured to the RN for backhaul uplink transmission.

For the specific work flow of the system and apparatus embodiments shown in fig. 6 to 8, please refer to the corresponding description in the method embodiment shown in fig. 3, which is not repeated herein.

In short, by adopting the technical scheme of the invention, the eNB informs the RN of the uplink subframe configured to the RN and used for backhaul uplink transmission in advance, so that the RN can not perform uplink scheduling on the UE in the configured uplink subframe in the subsequent process so as to avoid resource conflict. Moreover, the scheme of the invention solves the problem of how the eNB informs the RN of the configured MBSFN subframe in the mobile communication system introducing the RN.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for scheduling resources, comprising:

a base station eNB configures an uplink subframe for a relay node RN to perform backhaul link uplink transmission, and notifies the RN so that the RN does not perform uplink scheduling on user equipment UE in the uplink subframe;

the method further comprises the following steps:

and the eNB configures a downlink subframe for the RN for carrying out backhaul link downlink transmission and informs the RN.

2. The method of claim 1,

the eNB respectively notifies the RN of the uplink subframe for backhaul uplink transmission and the downlink subframe for backhaul downlink transmission;

or the eNB simultaneously notifies the RN of the uplink subframe for backhaul uplink transmission and the downlink subframe for backhaul downlink transmission.

3. The method of claim 1,

if the eNB and the RN work in a Frequency Division Duplex (FDD) mode, the uplink subframe for carrying out backhaul link uplink transmission and the downlink subframe for carrying out backhaul link downlink transmission are different subframes or the same subframe;

and if the eNB and the RN work in a Time Division Duplex (TDD) mode, the uplink subframe for carrying out backhaul link uplink transmission and the downlink subframe for carrying out backhaul link downlink transmission are different subframes.

4. The method of claim 1,

if the eNB configures an uplink subframe for backhaul uplink transmission in each radio frame at the same subframe position of each radio frame, the eNB configures an uplink subframe for the RN for backhaul uplink transmission, and notifying the RN includes:

the eNB sends a notification message comprising N bits to the RN, wherein N is a positive integer, the value of the notification message is the same as the number of subframes of an uplink subframe which can be used for backhaul link uplink transmission in each wireless frame, and a preset 1 or 0 is used for representing the uplink subframe which is configured for the RN and is used for backhaul link uplink transmission;

if the eNB configures a downlink subframe for backhaul downlink transmission in each radio frame at the same subframe position of each radio frame, the eNB configures a downlink subframe for the RN for backhaul downlink transmission, and notifying the RN of the downlink subframe includes:

the eNB sends a notification message comprising N bits to the RN, wherein N is a positive integer, the value of the notification message is the same as the number of subframes of a downlink subframe which can be used for backhaul downlink transmission in each predetermined wireless frame, and the predetermined 1 or 0 is used for representing the downlink subframe which is configured for the RN and is used for backhaul downlink transmission.

5. The method of claim 4,

if the eNB and the RN operate in the FDD mode, the subframe, which may be a downlink subframe for backhaul downlink transmission in each radio frame, includes: subframe 1, subframe 2, subframe 3, subframe 6, subframe 7, and subframe 8;

if the eNB and the RN operate in a TDD mode, the subframe, which may be a downlink subframe for backhaul downlink transmission, in each radio frame includes: subframe 3, subframe 4, subframe 7, subframe 8, and subframe 9.

6. The method of claim 1,

if the eNB configures uplink subframes for backhaul link uplink transmission in the M radio frames at different subframe positions in each radio frame by using M radio frames as a cycle and M is a positive integer, the eNB configures uplink subframes for backhaul link uplink transmission for the RN, and notifies the RN of the uplink subframes, including:

the eNB generates a configuration table, wherein the configuration table comprises M options which are respectively numbered as option 1 to option M, and each option corresponds to own configuration information and comprises the following steps: configuring an uplink subframe for backhaul link uplink transmission to the RN in each radio frame of the M radio frames;

the eNB sends more than one notification message to the RN, the number of the notification messages is less than M, each notification message corresponds to one option, each notification message comprises NxM bits, N is a positive integer, the value of N is the same as the number of subframes of an uplink subframe which can be used for backhaul link uplink transmission in each wireless frame, and a preset 1 or 0 is used for representing the uplink subframe which is configured for the RN and used for backhaul link uplink transmission in each wireless frame;

or,

the eNB sends more than one notification message to the RN, the number of the notification messages is less than M, each notification message corresponds to one option, each notification message comprises N bits, N is a positive integer, the value of N is the same as the number of subframes which can serve as uplink subframes of backhaul link uplink transmission in a first wireless frame in the option corresponding to the notification message, and preset 1 or 0 is used for representing the uplink subframes which are configured to the RN and used for backhaul link uplink transmission in the first wireless frame; the RN acquires uplink subframes which are configured in other wireless frames belonging to the same option with the first wireless frame and are used for backhaul link uplink transmission by inquiring the configuration table pre-stored by the RN;

or,

the eNB sends more than one notification message to the RN, the number of the notification messages is less than the number of the HARQ processes of the uplink automatic repeat request, and each notification message carries an uplink HARQ process number; the RN pre-stores HARQ timing relation, inquires the HARQ timing relation corresponding to the HARQ process number carried in each notification message, and acquires the configured uplink subframe for carrying out backhaul link uplink transmission according to the HARQ timing relation;

or,

the eNB sends more than one notification message to the RN, and each notification message carries an option number of the configuration table; and the RN acquires the configured uplink subframe for carrying out backhaul link uplink transmission according to the option number by inquiring the configuration table saved in advance by the RN.

7. The method of claim 1, further comprising:

and the eNB adjusts the uplink subframe number which is configured for the RN and used for carrying out backhaul uplink transmission and the downlink subframe number which is configured for the RN and used for carrying out backhaul downlink transmission according to the data volume on the link between the eNB and the RN.

8. The method of claim 7, wherein the adjusting comprises:

the eNB counts a Buffer Status Report (BSR) reported by the RN within a preset time, and adjusts the number of uplink subframes which are configured to the RN and used for backhaul link uplink transmission according to the BSR; meanwhile, the eNB counts a buffer state transmitted to the RN by the eNB within a preset time, and adjusts the number of downlink subframes which are configured to the RN and used for carrying out backhaul link downlink transmission according to the buffer state;

or the eNB adjusts the number of uplink subframes configured to the RN for backhaul link uplink transmission according to the adjustment request received from the RN; meanwhile, the eNB counts buffer states transmitted to the RN by the eNB within preset time, and adjusts the number of downlink subframes which are configured to the RN and used for carrying out backhaul link downlink transmission according to the buffer states.

9. A method for scheduling resources, comprising:

a relay node RN receives a notification message carrying an uplink subframe which is configured for the RN by an eNB and used for carrying out backhaul link uplink transmission from the eNB, and does not carry out uplink scheduling on user equipment UE in the uplink subframe;

the method further comprises the following steps:

the RN receives a notification message which is from the eNB and carries a downlink subframe which is configured by the eNB for the RN and used for carrying out backhaul link downlink transmission, and configures the downlink subframe for carrying out the backhaul link downlink transmission as a multicast single frequency network (MBSFN) subframe.

10. The method of claim 9, further comprising:

the RN sends an adjustment request to the eNB according to the Buffer Status Report (BSR) condition reported to the eNB by the RN within preset time so that the eNB adjusts the number of uplink subframes which are configured to the RN and used for backhaul uplink transmission according to the adjustment request; and receiving the adjusted uplink subframe configured to the RN and returned by the eNB for backhaul uplink transmission and the adjusted downlink subframe configured to the RN for backhaul downlink transmission.

11. A resource scheduling system, comprising:

the RN is used for receiving the notification message from the eNB and not performing uplink scheduling on the User Equipment (UE) in the uplink subframe;

the eNB is further configured to configure a downlink subframe for the RN for backhaul downlink transmission, and notify the RN of the downlink subframe;

the RN is further used for receiving the notification message from the eNB and configuring the downlink subframe for backhaul downlink transmission as a multicast single frequency network (MBSFN) subframe.

12. A base station (eNB), comprising:

a notification unit, configured to notify the RN of the configured uplink subframe;

the configuration unit is further configured to configure, for the RN, a downlink subframe for backhaul link downlink transmission;

the notifying unit is further configured to notify the RN of the configured downlink subframe.

13. The eNB of claim 12, further comprising:

and the adjusting unit is configured to adjust the number of uplink subframes configured to the RN for backhaul uplink transmission and the number of downlink subframes configured to the RN for backhaul downlink transmission according to the data amount on the link between the eNB and the RN.

14. The eNB of claim 13, wherein the adjusting unit comprises:

a first adjusting subunit, configured to count a buffer status report BSR reported by the RN within a predetermined time, and adjust, according to the BSR, an uplink subframe number, configured to the RN, for backhaul uplink transmission; or, receiving an adjustment request from the RN, and adjusting the number of uplink subframes configured to the RN for backhaul uplink transmission according to the adjustment request;

and the second adjusting subunit is configured to count a buffer state of the buffer transmitted by the eNB to the RN within a predetermined time, and adjust, according to the buffer state, a number of downlink subframes configured to the RN for performing backhaul link downlink transmission.

15. A Relay Node (RN), comprising:

a control unit, configured to not perform uplink scheduling on the user equipment UE in the uplink subframe;

the receiving unit is further configured to receive a notification message from the eNB carrying a downlink subframe configured by the eNB for the RN and used for backhaul downlink transmission;

the control unit is further configured to configure the downlink subframe for backhaul downlink transmission as a multicast single frequency network MBSFN subframe.

16. The RN of claim 15, wherein the RN further comprises:

a request unit, configured to send an adjustment request to the eNB according to a buffer status report BSR reported by the RN to the eNB within a predetermined time, so that the eNB adjusts, according to the adjustment request, an uplink subframe number configured to the RN for backhaul link uplink transmission.