CN102833860B - Host base station as well as method and device for coordinating interference of relay node and host base station access link - Google Patents

Abstract

The present invention discloses an interference coordination method and device between a relay node and a host base station access link, and the host base station. The method includes: 1) receiving the information of the relay node providing services for the relay user, and the corresponding information of the relay user; Candidate service node information, candidate service node information corresponding to direct transmission users, and schedulable frequency sets of relay nodes; 2) According to relay node information that provides services for relay users, candidate service node information corresponding to relay users and The information of the candidate service node corresponding to the direct transmission user establishes an interference graph, and divides the link bandwidth according to the schedulable frequency set; 3) schedules the link resources used by the direct transmission user according to the interference graph and the bandwidth division result. The invention establishes an interference graph according to the service information sent by the relay user and the direct transmission user, and allocates different frequency resources for the link used for the interaction between each direct transmission user and the host base station according to different interferences.

Description

Method and device for interference coordination between access links between relay node and donor base station, and donor base station

technical field

The present invention relates to the relay technology in the communication field, and in particular, relates to a method and device for coordinating interference between access links between a relay node and a host base station, and a host base station using the device.

Background technique

In the process of evolution from LTE (Long Term Evolution) to LTE-Advanced (evolved version of LTE), 3GPP proposes to introduce relay node RN (Relay Node) in the mobile communication network to improve the capacity of the system and/or expand the capacity of the system. coverage. Since the LTE system access adopts OFDMA (Orthogonal Frequency Division Multiple Access) technology, and the resources in the cell are allocated to users by the host base station eNB, there is only inter-cell interference, but the introduction of relay In the LTE-Advanced system of the node RN, interference occurs between the relay node RN and the donor base station eNB.

Specifically, the biggest difference between the LTE-Advanced system after introducing the relay node and the LTE system is that the resources in the cell are no longer orthogonal, and the frequencies used by the relay user and the direct transmission user overlap.

If the above-mentioned emerging interference cannot be handled well, the effect of introducing relay nodes will be greatly reduced.

In the prior art, when studying the interference coordination between the base station and the relay node on the access link, some divide the entire cell into an interference area, a transition area, and an interfered area, and then according to the relay user (i.e. The user served by the node RN, referred to as RN-UE) and the direct transmission user (that is, the user receiving the service of the host base station eNB, referred to as Macro UE) are located to allocate corresponding resources; some divide the entire cell into a cooperation area and a In the multiplexing area, the base station and the relay node adopt a cooperative strategy or serve users independently according to the location of the user.

The existing technology only roughly divides the entire cell into several areas, and different areas adopt different strategies, which cannot avoid or handle interference finely.

Contents of the invention

The purpose of the present invention is to propose a method, device and application for interference coordination between a relay node and a host base station access link in view of the defect that the interference coordination effect between the relay node and the host base station access link is poor in the prior art. The host base station of the device overcomes the above-mentioned defects in the prior art.

To achieve the above object, according to one aspect of the present invention, a method for coordinating interference between access links between a relay node and a donor base station is provided.

The interference coordination method between the relay and the donor base station access link according to the embodiment of the present invention includes:

1) The donor base station receives the relay node information that provides services for the relay user, the candidate service node information corresponding to the relay user, the candidate service node information corresponding to the direct transmission user, and the schedulable frequency set of the relay node;

2) The donor base station establishes an interference graph based on the relay node information that provides services for the relay user, the candidate service node information corresponding to the relay user, and the candidate service node information corresponding to the direct transmission user, and compares the link bandwidth according to the schedulable frequency set to divide;

3) The donor base station schedules the link resources used by the direct transmission users according to the interference graph and the bandwidth division result.

In the above technical solution, the relay node information that provides services for relay users and the information about candidate service nodes corresponding to relay users may be provided by the relay nodes that provide services for relay users.

In the above technical solution, the step of establishing the interference graph by the donor base station according to the relay node information serving the relay user, the candidate service node information corresponding to the relay user, and the candidate service node information corresponding to the direct transmission user may include:

21) The donor base station determines the interference generated by the relay user to the direct transmission user according to the information of the relay node providing the service for the relay user, the information of the candidate service node corresponding to the relay user, and the information of the candidate service node corresponding to the direct transmission user;

22) The host base station determines the interference type of the relay user to the direct transmission user according to the interference generated by the relay user to the direct transmission user;

23) The donor base station establishes an interference classification table for indicating that the direct transmission user is interfered by the relay user according to various interference categories generated by the relay user under each relay node;

The steps for the donor base station to divide the link bandwidth according to the schedulable frequency set may specifically include:

24) According to the received schedulable frequency set, the donor base station divides the link bandwidth into a bandwidth orthogonal to one relay node schedulable frequency set, a bandwidth orthogonal to two or more relay node schedulable frequency sets, and a bandwidth orthogonal to all relay node schedulable frequency sets. The relay node can schedule the bandwidth reused by all frequency sets.

In the above technical solution, the interference categories in step 22) may include:

Interference w ₁ : the candidate serving node information of one of the two users that caused the interference includes the serving node of the other user, and the candidate serving node information of the other user is empty;

Interference w ₂ : the candidate serving node information of one of the two users that caused the interference includes the serving node of the other user, and the candidate serving node information of the other user is not empty, or, the respective The candidate service node information respectively includes the service node of the other party;

Interference w _N : the respective candidate serving node information of the two users generating the interference does not include the other party's serving node.

In the above technical solution, step 22) specifically may include:

If the sum of the interference w ₂ generated by all relay users in the same relay node accounts for more than the threshold preset by the donor base station, the donor base station determines that the relay user of the relay node The interference to the direct transmission user is w ₂ ;

If the proportion of the sum of the interference w ₂ generated by all relay users in the same relay node in the interference received by direct transmission users is not greater than the threshold, and the interference generated by all relay users in the same relay node The proportion of the sum of w ₁ in the interference suffered by the direct transmission user is greater than the threshold, then the donor base station determines that the interference of the relay user of the relay node to the direct transmission user is w ₁ ;

If the proportion of the sum of the interference w ₂ generated by all relay users in the same relay node in the interference received by direct transmission users is not greater than the threshold, and the interference generated by all relay users in the relay node The proportion of the sum of w ₁ in the interference received by the direct transmission users is not greater than the threshold, then the donor base station determines that the interference of the relay users of the relay node to the direct transmission users is w _N .

In the above technical solution, the donor base station corresponds to the first relay node and the second relay node, the first relay node and the second relay node correspond to the first relay user and the second relay user respectively, and the first relay node The schedulable frequency set of the node is U1, and the schedulable frequency set of the second relay node is U2. The result of dividing the link bandwidth according to the schedulable frequency set is:

Link bandwidth A: Orthogonal to U1 and U2 respectively;

Link bandwidth B: orthogonal to U1 and multiplexed with U2;

Link bandwidth C: orthogonal to U2 and multiplexed with U1;

Link bandwidth D: multiplexed with U1 and U2 respectively.

In the above technical solution, step 3) specifically may include:

If the interference of the first relay user to the direct transmission user is w ₂ , and the interference of the second relay user to the direct transmission user is w ₂ , or if the interference of the first relay user to the direct transmission user is w ₁ , And the interference of the second relay user to the direct transmission user is w ₁ , and the donor base station allocates the direct transmission user to use the link bandwidth A to interact with the donor base station;

If the interference of the first relay user to the direct transmission user is w ₂ , and the interference of the second relay user to the direct transmission user is w ₁ or w _N , the donor base station allocates the direct transmission user to use the link bandwidth B and the donor base station interact;

If the interference of the second relay user to the direct transmission user is w ₂ , and the interference of the first relay user to the direct transmission user is w ₁ or w _N , the donor base station allocates the direct transmission user to use the link bandwidth C and the donor base station interact;

If the interference of the first relay user to the direct transmission user is w _N , and the interference of the second relay user to the direct transmission user is w _N , or if the interference of the first relay user to the direct transmission user is w _N , And the interference of the second relay user to the direct transmission user is w ₁ , or, if the interference of the first relay user to the direct transmission user is w ₁ , and the interference of the second relay user to the direct transmission user is w _N , The host base station allocates the direct transmission user to use the link bandwidth D to interact with the host base station.

In the above technical solution, if the direct transmission users using link bandwidth A, link bandwidth B, link bandwidth C, and link bandwidth D are in an unbalanced load state, the donor base station will perform frequency scheduling according to the proportional fair PF scheduling algorithm. Resource borrowing.

In the above technical solution, the threshold may be 20%.

To achieve the above object, according to another aspect of the present invention, an apparatus for coordinating interference between access links between a relay and a donor base station is provided.

The device for coordinating interference between a relay and a donor base station access link according to an embodiment of the present invention includes:

An information receiving module, configured to receive information on relay nodes providing services for relay users, information on candidate service nodes corresponding to relay users, information on candidate service nodes corresponding to direct transmission users, and a set of schedulable frequencies of relay nodes;

Establish a classification module, which is used to establish an interference graph based on the relay node information that provides services for the relay user, the candidate service node information corresponding to the relay user, and the candidate service node information corresponding to the direct transmission user, and set up the chain according to the schedulable frequency The road bandwidth is divided;

The resource scheduling module is used to schedule the link resources used by the direct transmission users according to the interference graph and the bandwidth division result.

In the above technical solution, in the information receiving module and the classification module, the relay node information that provides services for relay users and the information of candidate service nodes corresponding to relay users can be provided by the relay nodes that provide services for relay users .

In the above technical solution, establishing a classification module may include:

The interference determination submodule is used to determine the interference generated by the relay user to the direct transmission user according to the information of the relay node providing services for the relay user, the information of the candidate service node corresponding to the relay user, and the information of the candidate service node corresponding to the direct transmission user interference;

The category determination submodule is used to determine the interference category of the relay user to the direct transmission user according to the interference generated by the relay user to the direct transmission user;

The classification table establishment submodule is used to establish an interference classification table for indicating that direct transmission users are interfered by relay users according to various interference categories generated by relay users under each relay node;

The bandwidth division sub-module is used to divide the link bandwidth into a bandwidth orthogonal to one relay node schedulable frequency set and a bandwidth orthogonal to more than two relay node schedulable frequency sets according to the received schedulable frequency set And the bandwidth multiplexed with all relay node schedulable frequency sets.

In the above technical solution, the interference category in the category determination submodule may include:

Interference w ₁ : the candidate serving node information of one of the two users that caused the interference includes the serving node of the other user, and the candidate serving node information of the other user is empty;

Interference w ₂ : the candidate serving node information of one of the two users that caused the interference includes the serving node of the other user, and the candidate serving node information of the other user is not empty, or, the respective The candidate service node information respectively includes the service node of the other party;

Interference w _N : the respective candidate serving node information of the two users generating the interference does not include the other party's serving node.

In the above technical solution, the category determination submodule may include:

a threshold setting unit, configured to set a threshold for determining the type of interference between a relay user of a relay node and a direct transmission user;

The category determination unit is used to determine the interference category of the relay users of the relay node to the direct transmission users: if the sum of the interference _w2 generated by all relay users in the same relay node accounts for the interference received by the direct transmission users The proportion of is greater than the threshold, then it is determined that the relay user of the relay node interferes with the direct transmission user as w ₂ ;

If the proportion of the sum of the interference w ₂ generated by all relay users in the same relay node in the interference received by direct transmission users is not greater than the threshold, and the interference generated by all relay users in the same relay node The proportion of the sum of w ₁ in the interference suffered by the direct transmission user is greater than the threshold, then it is determined that the interference of the relay user of the relay node to the direct transmission user is w ₁ ;

If the proportion of the sum of the interference w ₂ generated by all relay users in the same relay node in the interference received by direct transmission users is not greater than the threshold, and the interference generated by all relay users in the relay node The proportion of the sum of w ₁ in the interference received by the direct transmission users is not greater than the threshold, then it is determined that the interference of the relay users of the relay node to the direct transmission users is w _N .

In the above technical solution, the donor base station corresponds to the first relay node and the second relay node, the first relay node and the second relay node correspond to the first relay user and the second relay user respectively, and the first relay node The schedulable frequency set of the node is U1, and the schedulable frequency set of the second relay node is U2. The result of dividing the link bandwidth by the establishment classification module according to the schedulable frequency set is:

Link bandwidth A: Orthogonal to U1 and U2 respectively;

Link bandwidth B: orthogonal to U1 and multiplexed with U2;

Link bandwidth C: orthogonal to U2 and multiplexed with U1;

Link bandwidth D: multiplexed with U1 and U2 respectively.

In the above technical solution, the resource scheduling module may include:

The interference receiving submodule is used to receive the interference category of the relay user to the direct transmission user determined by the category determination unit;

The link allocation sub-module is used to allocate link bandwidth to direct transmission users according to the interference category received by the interference receiving sub-module:

If the interference of the first relay user to the direct transmission user is w ₂ , and the interference of the second relay user to the direct transmission user is w ₂ , or if the interference of the first relay user to the direct transmission user is w ₁ , And the interference of the second relay user to the direct transmission user is w ₁ , then the direct transmission user is assigned to use the link bandwidth A to interact with the host base station;

If the interference of the first relay user to the direct transmission user is w ₂ , and the interference of the second relay user to the direct transmission user is w ₁ or w _N , assign the direct transmission user to use the link bandwidth B to interact with the donor base station;

If the interference of the second relay user to the direct transmission user is w ₂ , and the interference of the first relay user to the direct transmission user is w ₁ or w _N , assign the direct transmission user to use the link bandwidth C to interact with the donor base station;

If the interference of the first relay user to the direct transmission user is w _N , and the interference of the second relay user to the direct transmission user is w _N , or if the interference of the first relay user to the direct transmission user is w _N , And the interference of the second relay user to the direct transmission user is w ₁ , or, if the interference of the first relay user to the direct transmission user is w ₁ , and the interference of the second relay user to the direct transmission user is w _N , Then the direct transmission users are assigned to use the link bandwidth D to interact with the host base station.

In the above technical solution, the device also includes:

The PF scheduling module is used to borrow frequency resources according to the proportional fair PF scheduling algorithm if the direct transmission users in link bandwidth A, link bandwidth B, link bandwidth C and link bandwidth D are in an unbalanced load state .

In the above technical solution, the threshold may be 20%.

To achieve the above purpose, according to another aspect of the present invention, a donor base station is provided.

The donor base station according to the embodiment of the present invention includes any one of the devices for coordinating interference between the relay node and the access link of the donor base station.

The interference coordination method and device between the relay node and the host base station access link of the present invention, and the host base station establish an interference graph according to the candidate service node information of the relay user and the direct transmission user, and according to the schedulable frequency set sent by the relay node The bandwidth of the link used for the interaction between the direct transmission user and the donor base station is divided, and different frequency resources are allocated to the link used for the interaction between each direct transmission user and the donor base station according to different interferences.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

FIG. 1 is a flow chart of a method for coordinating interference between an access link between a relay node and a donor base station according to Embodiment 1 of the present invention;

2 is a flowchart of a method for coordinating interference between a relay node and a donor base station access link according to Embodiment 2 of the present invention;

3 is a flowchart of a method for coordinating interference between a relay node and a donor base station access link according to Embodiment 3 of the present invention;

FIG. 4 is a user distribution diagram of the interference coordination method between the relay node and the donor base station access link according to Embodiment 3 of the present invention;

FIG. 5 is an interference diagram obtained according to the embodiment of FIG. 4;

6 is a schematic diagram of an interference coordination device between a relay node and a donor base station access link according to Embodiment 1 of the present invention;

7 is a schematic diagram of an interference coordination device between a relay node and a donor base station access link according to Embodiment 2 of the present invention;

FIG. 8 is a schematic diagram of an apparatus for coordinating interference between a relay node and a donor base station access link according to Embodiment 3 of the present invention.

Detailed ways

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

The interference coordination method and device between the relay node and the host base station access link of the present invention mainly propose a solution to the following technical problems: In the LTE-Advanced system after the relay node is introduced, in order to improve the system throughput, direct transmission between users and The frequency resources used by the two relay node users overlap, so there will be greater interference between the two.

In order to overcome the above defects in the prior art, the present invention makes full use of the relationship between the donor base station eNB and the relay node RN to which the donor base station eNB belongs: on the one hand, in the access link, the relay node RN and The host base station eNB is at the same level, both have their own independent service users, the user served by the relay node RN is the relay user RN-UE, and the user served by the host base station eNB is the direct transmission user Macro UE; The relay node RN needs to transmit data back to the host base station through the backhaul link between the relay node and the host base station. At this time, the host base station is equivalent to the central node between the relay node and the host base station, so the host base station can be centralized as the central node The above-mentioned drawbacks of the prior art are overcome by means of resource management.

method embodiment

According to an embodiment of the present invention, a method for coordinating interference between an access link between a relay node and a donor base station is provided. FIG. 1 is a diagram of an interference coordination method between a relay node and a donor base station access link according to Embodiment 1 of the present invention Flow chart, as shown in Figure 1, the present embodiment includes:

Step S102: The donor base station receives the relay node information that provides services for the relay user, the candidate service node information corresponding to the relay user, the candidate service node information corresponding to the direct transmission user, and the schedulable frequency set of the relay node;

Step S104: The donor base station establishes an interference graph based on the relay node information serving the relay user, the candidate serving node information corresponding to the relay user, and the candidate serving node information corresponding to the direct transmission user, and links the links according to the schedulable frequency set The bandwidth is divided;

Step S106: The donor base station schedules the link resource used by the direct transmission user according to the interference graph and the bandwidth division result.

It should be noted that the relay node information providing services for the relay users and the candidate service node information corresponding to the relay users are provided by the relay nodes providing services for the relay users.

It should be noted that the above schedulable frequency set is a set of frequency resources that can be used by the relay during interaction with the relay user.

In the interference coordination method between the relay node and the host base station access link in this embodiment, an interference graph is established according to the candidate serving node information of the relay user and the direct transmission user, and the direct transmission user is detected according to the schedulable frequency set sent by the relay node. The bandwidth of the link used for interaction with the donor base station is divided, and different frequency resources are allocated for the link used for the interaction between each direct transmission user and the donor base station according to different interferences.

According to an embodiment of the present invention, a method for coordinating interference between an access link between a relay node and a donor base station is provided. FIG. Flow chart, as shown in Figure 2, this embodiment includes:

Step S202: The relay node RN receives the candidate serving node information fed back by the relay user RN-UE, and the donor base station eNB receives the candidate serving node information fed back by the direct transmission user Macro UE;

Step S204: the donor base station eNB receives the schedulable frequency set fed back by the relay node RN;

Step S206: the relay node RN forwards the relay node information and candidate serving node information fed back by the relay user RN-UE to the donor base station eNB;

Step S208: The donor base station eNB receives various interferences generated by the relay user RN-UE in the same relay node RN, and determines the interference type of the relay user RN-UE of the relay node RN to the direct transmission user Macro UE;

Step S210: The donor base station eNB establishes an interference classification table for the direct transmission user Macro UE according to various interference categories generated by the relay user RN-UE under each relay node RN;

Step S212: The donor base station eNB divides the link bandwidth into multiple parts according to the received schedulable frequency set;

Step S214: Scheduling the link resource used by the direct transmission user according to the interference category of the relay user RN-UE to the direct transmission user Macro UE and the interference classification table of the direct transmission user Macro UE.

It should be noted that the service information in Embodiment 1 includes the serving node and candidate serving node information in this embodiment; in the above steps of this embodiment, the serving node includes the donor base station eNB and the two The relay nodes RN1 and RN2 are adjacent to each other with the host base station eNB. The relay users corresponding to RN1 and RN2 are RN1-UE and RN2-UE respectively, and the schedulable frequency sets fed back by RN1 are U1, RN2 The schedulable frequency set for feedback is U2.

In the interference coordination method between the relay node and the access link of the donor base station in this embodiment, the relay node RN is limited to two, that is, RN1 and RN2. After the interference category of the transmission user Macro UE is determined, the interference classification table of the direct transmission user Macro UE is established, and the link resources used by the direct transmission user are scheduled according to the interference category of the relay user RN-UE to the direct transmission user Macro UE, reducing The interference caused by the link interaction between the relay user and the relay node and the link interaction between the donor base station and the direct transmission user is eliminated.

According to an embodiment of the present invention, a method for coordinating interference between an access link between a relay node and a donor base station is provided. FIG. Flow chart, as shown in Figure 3, this embodiment includes:

Step S302: The serving node receives the candidate serving node information fed back by the relay user RN-UE and the direct transmission user Macro UE, and the donor base station eNB receives the schedulable frequency set fed back by the relay node RN;

Step S304: the relay node RN forwards the serving node and candidate serving node information fed back by the relay user RN-UE to the donor base station eNB;

Step S306: The donor base station eNB establishes an interference graph according to the serving node and candidate serving node information in steps S302 and S304;

4 is a user distribution diagram of the interference coordination method between the relay node and the donor base station access link according to Embodiment 3 of the present invention, wherein MS1 is the direct transmission user of the donor base station eNB, and MS2 and MS4 are the relay nodes RN1 Relay users, MS3 and MS5 are relay users of relay node RN2, and the schedulable frequencies of relay nodes RN1 and RN2 are U1 and U2 respectively. The technical problem to be solved in the present invention is to ensure that the host base station eNB and direct transmission The link interaction of user MS1 is not interfered by U1 and U2 as far as possible, and the link bandwidth is reasonably allocated according to the geographic location of each direct transmission user of eNB to ensure the interaction quality between each direct transmission user and eNB.

Table 1 is the service node and candidate service node information table of each user in Figure 4, wherein, An: represents the service node of user n; Bn: represents the candidate service node information of user n:

Table 1

user service node Candidate service node information MS1 A1=eNB B1={RN1} MS2 A2＝RN1 B2={} MS3 A3＝RN2 B3＝{RN1} MS4 A4＝RN1 B4＝{eNB} MS5 A5＝RN2 B5={eNB, RN1}

Let's take Figure 4 and Table 1 as examples to describe the interference categories in Figure 4 in detail:

Intra-cell interference w _A : generated by MS2 and MS4. MS2 and MS4 are located in the same serving node RN1, so there is intra-cell interference. At this time, the interference between MS2 and MS4 is infinite and must be avoided;

Inter-cell interference w ₁ : generated by MS2 and MS3, MS3’s candidate serving node information {RN1} includes MS2’s serving node RN1, and MS2’s candidate serving node information is empty;

Inter-cell interference w ₂ : 1) It is generated by MS3 and MS4, the candidate serving node information {RN1} of MS3 includes the serving node RN1 of MS4, and the candidate serving node information of MS4 is not empty;

2) Generated by MS1 and MS4, the respective candidate service node information of MS1 and MS4 includes the other party's service node.

Inter-cell interference w _N : Since the respective candidate serving node information of MS1 and MS4 does not include the serving node of the other party, there is no inter-cell interference.

According to the above interference description, according to the embodiment shown in FIG. 4 and Table 1, it can be obtained that the interference diagram is shown in FIG. 5 .

According to Figure 4 and Table 1, it can be seen that the interference between MS1 and MS2 is w ₁ , draw a straight line between MS1 and MS2 in Figure 5, and mark it as w ₁ , which means the interference between MS1 and MS2 is w ₁ ; Draw a straight line between MS3 and mark it as w _N , which means the interference between MS1 and MS3 is w _N ; draw a straight line between MS1 and MS4 and mark it as w ₂ , which means the interference between MS1 and MS4 is w ₂ ; .. ....So on and so forth.

The eNB establishes an interference graph between the Macro UE and the RN-UE in each sector, and then maps the interference to the RN according to the interference from the Macro UE to multiple RN-UEs under one RN.

The specific method is as follows: according to the proportion of various interferences generated by RN-UEs in the same RN in the interference received by Macro UEs, determine whether the interference generated by the RN to Macro UEs is w ₁ , w ₂ or w _N . Set the threshold X%, if the interference w ₂ generated by the relay user RN-UE in the same relay node RN accounts for more than the threshold, the relay node RN's relay The interference of the user RN-UE to the direct transmission user Macro UE is w ₂ ; if the interference w ₂ generated by the relay user RN-UE in the same relay node RN accounts for no more than This threshold, and the proportion of the interference w ₁ generated by the relay user RN-UE in the same relay node RN in the interference received by the direct transmission user Macro UE is greater than this threshold, the relay user RN of the relay node RN - The interference from the UE to the direct transmission user Macro UE is w ₁ ; if the interference w ₂ generated by the relay user RN-UE in the same relay node RN accounts for no more than this threshold, and the proportion of the interference w ₁ generated by the relay user RN-UE in the same relay node RN in the interference received by the direct transmission user Macro UE is not greater than the threshold, then the relay node RN's relay The interference of the user RN-UE to the direct transmission user Macro UE is w _N .

An example is as follows: There are two RNs under a certain eNB, RN1 and RN2. For example, there are 8 UEs under RN1, and there are 3, 3, and 2 RN-UEs that interfere with w ₂ , w ₁ , and w _N respectively. The proportion of RN-UEs with w ₂ is 3/8 exceeding the threshold of 20%, and it is determined that RN1-UE interferes with the Macro UE of the eNB as w ₂ ; there are 6 UEs under RN2, causing interference w ₂ , w There are ₁ , 3, and 2 RN-UEs with 1 and w _N respectively. The proportion of RN-UEs with interference w ₂ is 1/6 and does not exceed the threshold of 20%. The proportion of RN-UEs with interference w ₁ The proportion is 3/6 exceeding the threshold of 20%, and it is determined that the RN2-UE interferes with the Macro UE of the eNB as w ₁ , so the category of the Macro UE being interfered by RN1-UE and RN2-UE is w ₂ w ₁ .

Finally, according to the different interference combinations of RN1-UE and RN2-UE that the Macro UE receives, the 3×3 interference classification table of the Macro UE is obtained, as shown in Table 2.

Table 2

The ordinate of Table 2 is the interference w ₂ , w ₁ , w _N generated by RN1-UE to Macro UE from top to bottom, and the abscissa of Table 2 is the interference to Macro UE generated by RN2-UE from left to right. Interference w ₂ , w ₁ , w _N , each cell in Table 2 is the interference combination corresponding to the ordinate and the abscissa of the interference classification table received by the Macro UE.

Step S308: The donor base station receives the schedulable frequency sets U1 and U2 of RN1 and RN2 according to step S302, and divides the link bandwidth into multiple parts: U ₁ ∩U ₂ , where Table 3 is the correspondence table between the link bandwidth and the interference classification in Table 2;

That is, Link A: Link A is orthogonal to U1 and U2 resources respectively, and can be used for high interference, as shown in the horizontal striped area in Table 3;

That is, Link B: Link B is orthogonal to U1 resources and multiplexed with U2 resources. This part is mainly used for light interference, as shown in the slanted area at the upper right position in Table 3;

That is, Link C: Link C is orthogonal to U2 resources and multiplexed with U1 resources. This part is mainly used for light interference, as shown in the slanted area at the lower left in Table 3;

U ₁ ∩ _{U 2} is link D: Link D is multiplexed with U1 and U2 resources. This part is mainly used in the case of almost no interference, as shown in the grid area at the lower right in Table 3.

table 3

Step S310: The donor base station allocates the link used for the interaction between the Macro UE and the eNB according to various types of interference generated by the relay user RN-UE under each relay node RN;

According to the corresponding relationship in Table 3, 9 kinds of Macro UEs affected by different types of interference are divided into four groups, corresponding to four different frequency sets, and PF (proportional fair) scheduling is performed, and if there are two parts in each scheduling set, are scheduled in sequential order. details as follows:

The meaning of the above corresponding relationship is as follows:

In the first line, if the Macro UE is subject to RN1-UE, RN2-UE interference combination category falls into the horizontal striped area in Table 3, that is, if the interference of RN1-UE to Macro UE is w ₂ , and RN2-UE to Macro UE The interference of RN1-UE to Macro UE is w ₂ , or, if the interference of RN1-UE to Macro UE is w ₁ , and the interference of RN2-UE to Macro UE is w ₁ , assign Macro UE to use link A to interact with eNB;

In the second row, if the Macro UE is subject to RN1-UE, RN2-UE interference combination category falls into the slanted area in the upper right position in Table 3, that is, if the interference of RN1-UE to Macro UE is w ₂ , and RN2-UE to Macro UE If the interference of the UE is w ₁ or w _N , the Macro UE is assigned to use link B to interact with the eNB;

In the third line, if the category of Macro UE being interfered by RN1-UE and RN2-UE falls into the oblique area in the lower left position in Table 3, that is, if the interference of RN2-UE to Macro UE is w ₂ , and RN1-UE interferes with Macro UE If the interference of the UE is w ₁ or w _N , the Macro UE is assigned to use link C to interact with the eNB;

In the fourth row, if the Macro UE is subject to RN1-UE, RN2-UE interference combination category falls into the grid area at the lower right position in Table 3, that is, if the interference of RN1-UE to Macro UE is w _N , and RN2-UE The interference to Macro UE is w _N , or, if the interference of RN1-UE to Macro UE is w _N , and the interference of RN2-UE to Macro UE is w ₁ , or, if the interference of RN1-UE to Macro UE is w ₁ , and the interference of RN2-UE to Macro UE is w _N , then allocate Macro UE to use link D to interact with eNB.

In the above corresponding relationship, if PF scheduling is performed, it is first scheduled according to the corresponding relationship of the upper layer, and then scheduled according to the corresponding relationship of the lower layer.

Step S312: If the Macro UEs in the four links are in an unbalanced load state, the donor base station performs frequency resource borrowing according to the PF scheduling algorithm.

In link A, link B, link C, and link D of the system bandwidth, if the Macro UE in the above four links is in an unbalanced load state, the frequency resource is borrowed according to the proportional fair PF scheduling algorithm, The surrounding frequency sets can be borrowed, and the borrowing order is first left (upper) and then right (lower) (refer to Table 3).

Let’s first illustrate the frequency resource borrowing in this step with an example:

Taking the LTE system as an example, assuming that the system bandwidth is 10MHz and there are 50 RBs in total, each corresponding frequency resource and U ₁ ∩ _{U 2} are 12, 14, 12, and 12 RBs respectively. Among the Macro UEs, the Macro UEs with the interference combination category of RN1-UE and RN2-UE are w ₂ w ₂ w ₁ w ₁ (allocation using link A) The total bandwidth required is 10 RBs, and the total bandwidth required by the Macro UE (assigned to use link B) with RN1-UE and RN2-UE interference category w ₂ w _N w ₂ w ₁ is 16 RB, subject to RN1-UE, RN2-UE interference combined category is w _N w ₂ w ₁ w ₂ Macro UE (allocated using link C) requires a total bandwidth of 12 RBs, subject to RN1-UE, RN2-UE The total bandwidth required by the Macro UE (assigned to use link D) whose interference combination category is w _N w _N w _N w ₁ w ₁ w _N is 12 RBs. Therefore, the Macro UEs in the first two types of links are in an unbalanced load state and need to call frequency. After the Macro UE interfered by w ₂ w ₂ w ₁ w ₁ uses up its 10 RBs, the remaining 2 RBs are borrowed by the Macro UE interfered by w ₂ w _N w ₂ w ₁ .

The interference coordination method between the relay node and the donor base station access link in this embodiment further exemplifies and refines method embodiments 1 and 2, and realizes the flexible allocation of each Macro UE according to the location of each Macro UE. This provides conditions for the efficient and full use of frequency resources, and realizes the rapid matching of Macro UEs that are interfered to different degrees with different frequency resources.

Device embodiment

According to an embodiment of the present invention, an apparatus for coordinating interference between an access link between a relay node and a donor base station is provided. FIG. Schematic diagram, as shown in Figure 6, this embodiment includes:

The information receiving module 100 is configured to receive relay node information providing services for relay users, candidate service node information corresponding to relay users, candidate service node information corresponding to direct transmission users, and a schedulable frequency set of relay nodes;

Establishing a classification module 200, configured to establish an interference graph according to the relay node information providing services for the relay user, the candidate service node information corresponding to the relay user, and the candidate service node information corresponding to the direct transmission user, and set the pair according to the schedulable frequency Link bandwidth is divided;

The resource scheduling module 300 is configured to schedule link resources used by direct transmission users according to the interference graph and bandwidth division results.

It should be noted that, in the information receiving module 100 and the establishing classification module 200, the relay node information that provides services for relay users and the candidate service node information corresponding to relay users are provided by the relay nodes that provide services for relay users .

It should be noted that the above schedulable frequency set is a set of frequency resources that can be used by the relay during interaction with the relay user.

It should be noted that, the above-mentioned receiving module 100, establishing classification module 200 and resource scheduling module 300 are all set in the donor base station eNB.

The device for coordinating interference between the access link between the relay node and the donor base station in this embodiment establishes an interference graph according to the service information sent by the relay user and the direct transmission user, and compares the direct transmission user and the direct transmission user according to the schedulable frequency set sent by the relay node. The link bandwidth used for the interaction between the donor base stations is divided, and different frequency resources are allocated for the links used for the interaction between each direct transmission user and the donor base station according to different interferences.

According to an embodiment of the present invention, an apparatus for coordinating interference between an access link between a relay node and a donor base station is provided. FIG. Schematic diagram, as shown in Figure 7, this embodiment includes:

The information receiving module 100 is configured to receive relay node information providing services for relay users, candidate service node information corresponding to relay users, candidate service node information corresponding to direct transmission users, and a schedulable frequency set of relay nodes;

Establishing a classification module 200, configured to establish an interference graph according to the relay node information providing services for the relay user, the candidate service node information corresponding to the relay user, and the candidate service node information corresponding to the direct transmission user, and set the pair according to the schedulable frequency Link bandwidth is divided;

The resource scheduling module 300 is configured to schedule link resources used by direct transmission users according to the interference graph and bandwidth division results.

Build classification module 200 includes:

The interference determination sub-module 210 is configured to determine the interference caused by the relay user to the direct transmission user according to the relay node information serving the relay user, the candidate service node information corresponding to the relay user, and the candidate service node information corresponding to the direct transmission user interference;

The category determination sub-module 220 is configured to determine the interference category of the relay user to the direct transmission user according to the interference generated by the relay user to the direct transmission user;

The classification table establishment sub-module 230 is used to establish an interference classification table for indicating that direct transmission users are interfered by relay users according to various types of interference generated by relay users under each relay node;

The bandwidth division sub-module 240 is used to divide the link bandwidth into a bandwidth orthogonal to one relay node schedulable frequency set and a bandwidth orthogonal to more than two relay node schedulable frequency sets according to the received schedulable frequency set. Bandwidth and bandwidth multiplexed with all relay node schedulable frequency sets.

It should be noted that, the above-mentioned information receiving module 100, establishing classification module 200 and resource scheduling module 300 are all set in the donor base station eNB.

The device for coordinating interference between the access link between the relay node and the donor base station in this embodiment establishes the direct transmission user Macro UE after determining the type of interference between the relay user RN-UE of the relay node RN and the direct transmission user Macro UE. The interference classification table of the UE schedules the link resources used by the direct transmission user according to the interference category of the relay user RN-UE to the direct transmission user Macro UE, which reduces the link interaction between the relay user and the relay node and the host base station Interference caused by link interactions with direct users.

According to an embodiment of the present invention, an apparatus for coordinating interference between an access link between a relay node and a donor base station is provided. FIG. 8 is a diagram of an apparatus for coordinating interference between an access link between a relay node and a donor base station according to Embodiment 3 of the present invention. Schematic diagram, as shown in Figure 8, this embodiment includes:

The information receiving module 100 is configured to receive relay node information providing services for relay users, candidate service node information corresponding to relay users, candidate service node information corresponding to direct transmission users, and a schedulable frequency set of relay nodes;

Establishing a classification module 200, configured to establish an interference graph according to the relay node information providing services for the relay user, the candidate service node information corresponding to the relay user, and the candidate service node information corresponding to the direct transmission user, and set the pair according to the schedulable frequency Link bandwidth is divided;

The resource scheduling module 300 is configured to schedule link resources used by direct transmission users according to the interference graph and bandwidth division results.

Build classification module 200 includes:

The interference determination sub-module 210 is configured to determine the interference caused by the relay user to the direct transmission user according to the relay node information serving the relay user, the candidate service node information corresponding to the relay user, and the candidate service node information corresponding to the direct transmission user interference;

The category determination sub-module 220 is configured to determine the interference category of the relay user to the direct transmission user according to the interference generated by the relay user to the direct transmission user;

The classification table establishment sub-module 230 is used to establish an interference classification table for indicating that direct transmission users are interfered by relay users according to various types of interference generated by relay users under each relay node;

The bandwidth division sub-module 240 is used to divide the link bandwidth into a bandwidth orthogonal to one relay node schedulable frequency set and a bandwidth orthogonal to more than two relay node schedulable frequency sets according to the received schedulable frequency set. Bandwidth and bandwidth multiplexed with all relay node schedulable frequency sets.

The interference category in the category determination submodule 220 includes:

Interference w ₁ : the candidate serving node information of one of the two users that caused the interference includes the serving node of the other user, and the candidate serving node information of the other user is empty;

Interference w ₂ : the candidate serving node information of one of the two users that caused the interference includes the serving node of the other user, and the candidate serving node information of the other user is not empty, or, the respective The candidate service node information respectively includes the service node of the other party;

Interference w _N : the respective candidate serving node information of the two users generating the interference does not include the other party's serving node.

Category determination submodule 220 includes:

A threshold setting unit 221, configured to set a threshold for determining the type of interference between a relay user of a relay node and a direct transmission user;

The category determination unit 222 is configured to determine the interference category of the relay users of the relay node to the direct transmission users: if the sum of the interference _w2 generated by all the relay users in the same relay node exceeds the interference received by the direct transmission users If the proportion is greater than the above threshold, it is determined that the interference of the relay user of the relay node to the direct transmission user is w ₂ ;

If the sum of the interference w ₂ generated by all relay users in the same relay node accounts for the proportion of the interference received by direct transmission users is not greater than the above threshold, and the interference w generated by all relay users in the same relay node The proportion of the sum of ₁ in the interference received by the direct transmission user is greater than the above threshold, then it is determined that the interference of the relay user of the relay node to the direct transmission user is w ₁ ;

If the sum of the interference w ₂ generated by all relay users in the same relay node accounts for the proportion of the interference received by direct transmission users is not greater than the above threshold, and the interference w generated by all relay users in the relay node The proportion of the sum of ₁ in the interference received by the direct transmission users is not greater than the above threshold, then it is determined that the interference of the relay users of the relay node to the direct transmission users is w _N .

The interference classification table established by the classification table establishment sub-module 230 is a 3×3 mapping table:

The vertical coordinates of the mapping table are the interference w ₂ , w ₁ , and w _N generated by the first relay user to the direct transmission user from top to bottom;

The abscissa of the mapping table from left to right is the interference w ₂ , w ₁ , w _N generated by the second relay user to the direct transmission user;

Each cell in the mapping table is the interference combination corresponding to the ordinate and corresponding to the abscissa of the mapping table received by the direct transmission user.

Wherein, the donor base station corresponds to the first relay node and the second relay node, the first relay node and the second relay node correspond to the first relay user and the second relay user respectively, and the first relay node can schedule frequency The set is U1, the set of schedulable frequencies of the second relay node is U2, and the result of dividing the link bandwidth by the establishment classification module 200 according to the set of schedulable frequencies is:

Link bandwidth A: Orthogonal to U1 and U2 respectively;

Link bandwidth B: orthogonal to U1 and multiplexed with U2;

Link bandwidth C: orthogonal to U2 and multiplexed with U1;

Link bandwidth D: multiplexed with U1 and U2 respectively.

The resource scheduling module 300 includes:

The interference receiving submodule 310 is configured to receive the interference category of the relay user to the direct transmission user determined by the category determining unit 222;

The link allocation sub-module 320 is configured to allocate link bandwidth to direct transmission users according to the interference category received by the interference receiving sub-module 310:

If the interference of the first relay user to the direct transmission user is w ₂ , and the interference of the second relay user to the direct transmission user is w ₂ , or if the interference of the first relay user to the direct transmission user is w ₁ , And the interference of the second relay user to the direct transmission user is w ₁ , then allocate the direct transmission user to use the link bandwidth A to interact with the donor base station;

If the interference of the first relay user to the direct transmission user is w ₂ , and the interference of the second relay user to the direct transmission user is w ₁ or w _N , assign the direct transmission user to use the link bandwidth B to interact with the donor base station;

If the interference of the second relay user to the direct transmission user is w ₂ , and the interference of the first relay user to the direct transmission user is w ₁ or w _N , assign the direct transmission user to use the link bandwidth C to interact with the donor base station;

If the interference of the first relay user to the direct transmission user is w _N , and the interference of the second relay user to the direct transmission user is w _N , or if the interference of the first relay user to the direct transmission user is w _N , And the interference of the second relay user to the direct transmission user is w ₁ , or, if the interference of the first relay user to the direct transmission user is w ₁ , and the interference of the second relay user to the direct transmission user is w _N , Then the direct transmission users are assigned to use the link bandwidth D to interact with the host base station.

The device for coordinating interference between the relay node and the access link of the donor base station in this embodiment further includes:

The PF scheduling module 400 is used to perform frequency resources according to the proportional fair PF scheduling algorithm if the direct transmission users using link bandwidth A, link bandwidth B, link bandwidth C, and link bandwidth D are in a state of unbalanced load. borrow.

The threshold set by the threshold setting unit 221 is 20%.

It should be noted that the above-mentioned information receiving module 100, establishment and classification module 200, resource scheduling module 300 and PF scheduling module 400 are all set in the donor base station eNB.

The interference coordination device between the relay node and the donor base station access link in this embodiment further exemplifies and refines the device embodiments 1 and 2, and realizes the flexible allocation of each Macro UE according to the location of each Macro UE. This provides conditions for the efficient and full use of frequency resources, and realizes the rapid matching of Macro UEs that are interfered to different degrees with different frequency resources.

According to an embodiment of the present invention, a donor base station is provided, and this embodiment includes the device for coordinating interference between an access link between a relay node and a donor base station according to any one of FIGS. 6-8 .

In the host base station of this embodiment, the interference coordination device between the relay node and the access link of the host base station is set in the base station, which realizes the flexible allocation of various frequency resources according to the location of each Macro UE, which is efficient and sufficient The use of frequency resources provides the conditions to realize the rapid matching of Macro UEs with different degrees of interference and different frequency resources.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still The technical solutions recorded in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (17)

1. A method for coordinating interference between a relay node and a donor base station access link, comprising: 1) The donor base station receives the relay node information that provides services for the relay user, the candidate service node information corresponding to the relay user, the candidate service node information corresponding to the direct transmission user, and the schedulable frequency set of the relay node; 2) The donor base station establishes an interference graph based on the relay node information that provides services for the relay user, the candidate service node information corresponding to the relay user, and the candidate service node information corresponding to the direct transmission user, and sets the link according to the schedulable frequency set The road bandwidth is divided; 3) The donor base station schedules the link resource used by the direct transmission user according to the interference graph and the bandwidth division result; The step of establishing the interference graph by the donor base station according to the relay node information providing services for the relay user, the candidate service node information corresponding to the relay user, and the candidate service node information corresponding to the direct transmission user includes: 21) The donor base station determines the interference generated by the relay user to the direct transmission user according to the information of the relay node providing the service for the relay user, the information of the candidate service node corresponding to the relay user, and the information of the candidate service node corresponding to the direct transmission user; 22) The host base station determines the interference type of the relay user to the direct transmission user according to the interference generated by the relay user to the direct transmission user; 23) The donor base station establishes an interference classification table for indicating that the direct transmission user is interfered by the relay user according to various interference categories generated by the relay user under each relay node; The step of dividing the link bandwidth by the donor base station according to the schedulable frequency set specifically includes: 24) According to the received schedulable frequency set, the donor base station divides the link bandwidth into a bandwidth orthogonal to one relay node schedulable frequency set, a bandwidth orthogonal to more than two relay node schedulable frequency sets, and The bandwidth multiplexed with all relay node schedulable frequency sets. 2. The method according to claim 1, wherein the relay node information providing services for relay users and the candidate service node information corresponding to relay users are provided by the relay nodes providing services for relay users . 3. The method according to claim 1, wherein the interference category in the step 22) comprises: Interference w ₁ : the candidate serving node information of one of the two users that caused the interference includes the serving node of the other user, and the candidate serving node information of the other user is empty; Interference w ₂ : the candidate serving node information of one of the two users that caused the interference includes the serving node of the other user, and the candidate serving node information of the other user is not empty, or, the respective The candidate service node information respectively includes the service node of the other party; Interference w _N : the respective candidate serving node information of the two users generating the interference does not include the other party's serving node. 4. method according to claim 3, is characterized in that, described step 22) specifically comprises: If the sum of the interference w ₂ generated by all relay users in the same relay node accounts for more than the threshold preset by the donor base station, the donor base station determines that the relay user of the relay node The interference to the direct transmission user is w ₂ ; If the proportion of the sum of the interference w ₂ generated by all relay users in the same relay node in the interference received by direct transmission users is not greater than the threshold, and the interference generated by all relay users in the same relay node The proportion of the sum of w ₁ in the interference suffered by the direct transmission user is greater than the threshold, then the donor base station determines that the interference of the relay user of the relay node to the direct transmission user is w ₁ ; If the proportion of the sum of the interference w ₂ generated by all relay users in the same relay node in the interference received by direct transmission users is not greater than the threshold, and the interference generated by all relay users in the relay node The proportion of the sum of w ₁ in the interference received by the direct transmission users is not greater than the threshold, then the donor base station determines that the interference of the relay users of the relay node to the direct transmission users is w _N . 5. The method according to claim 4, wherein the master base station corresponds to the first relay node and the second relay node, and the first relay node and the second relay node respectively correspond to the first relay user For the second relay user, the schedulable frequency set of the first relay node is U1, and the schedulable frequency set of the second relay node is U2. The result of dividing the link bandwidth according to the schedulable frequency set is: Link bandwidth A: orthogonal to the U1 and U2 respectively; Link bandwidth B: orthogonal to the U1 and multiplexed with U2; Link bandwidth C: orthogonal to the U2 and multiplexed with U1; Link bandwidth D: multiplexed with U1 and U2 respectively. 6. method according to claim 5, is characterized in that, described step 3) specifically comprises: If the interference of the first relay user to the direct transmission user is w ₂ , and the interference of the second relay user to the direct transmission user is w ₂ , or if the interference of the first relay user to the direct transmission user is w ₁ , And the interference of the second relay user to the direct transmission user is w ₁ , and the donor base station allocates the direct transmission user to use the link bandwidth A to interact with the donor base station; If the interference of the first relay user to the direct transmission user is w ₂ , and the interference of the second relay user to the direct transmission user is w ₁ or w _N , the donor base station allocates the link bandwidth B and host base station interaction; If the interference of the second relay user to the direct transmission user is w ₂ , and the interference of the first relay user to the direct transmission user is w ₁ or w _N , the donor base station allocates the link bandwidth C and host base station interaction; If the interference of the first relay user to the direct transmission user is w _N , and the interference of the second relay user to the direct transmission user is w _N , or if the interference of the first relay user to the direct transmission user is w _N , And the interference of the second relay user to the direct transmission user is w ₁ , or, if the interference of the first relay user to the direct transmission user is w ₁ , and the interference of the second relay user to the direct transmission user is w _N , The host base station allocates the direct transmission user to use the link bandwidth D to interact with the host base station. 7. The method according to claim 6, wherein if the direct transmission users using link bandwidth A, link bandwidth B, link bandwidth C, and link bandwidth D are in an unbalanced load state, the host base station The frequency resource is borrowed according to the proportional fair PF scheduling algorithm. 8. The method according to any one of claims 4-7, wherein the threshold is 20%. 9. An interference coordination device between a relay node and a donor base station access link, characterized in that it comprises: An information receiving module, configured to receive information on relay nodes providing services for relay users, information on candidate service nodes corresponding to relay users, information on candidate service nodes corresponding to direct transmission users, and a set of schedulable frequencies of relay nodes; Establishing a classification module for establishing an interference graph according to the relay node information serving the relay user, the candidate service node information corresponding to the relay user, and the candidate service node information corresponding to the direct transmission user, and according to the schedulable frequency set Divide link bandwidth; A resource scheduling module, configured to schedule link resources used by the direct transmission users according to the interference graph and bandwidth division results; Described establishment classification module comprises: The interference determination submodule is used to determine the interference generated by the relay user to the direct transmission user according to the information of the relay node providing services for the relay user, the information of the candidate service node corresponding to the relay user, and the information of the candidate service node corresponding to the direct transmission user interference; The category determination submodule is used to determine the interference category of the relay user to the direct transmission user according to the interference generated by the relay user to the direct transmission user; The classification table establishment submodule is used to establish an interference classification table for indicating that direct transmission users are interfered by relay users according to various interference categories generated by relay users under each relay node; The bandwidth division sub-module is used to divide the link bandwidth into a bandwidth orthogonal to one relay node schedulable frequency set and a bandwidth orthogonal to more than two relay node schedulable frequency sets according to the received schedulable frequency set. and the bandwidth multiplexed with all relay node schedulable frequency sets. 10. The device according to claim 9, wherein, in the information receiving module and the classifying module, the relay node information providing services for relay users and the candidate service node information corresponding to relay users Provided by relay nodes that serve relay users. 11. The device according to claim 9, wherein the interference category in the category determination submodule comprises: Interference w ₁ : the candidate serving node information of one of the two users that caused the interference includes the serving node of the other user, and the candidate serving node information of the other user is empty; Interference w ₂ : the candidate serving node information of one of the two users that caused the interference includes the serving node of the other user, and the candidate serving node information of the other user is not empty, or, the respective The candidate service node information respectively includes the service node of the other party; Interference w _N : the respective candidate serving node information of the two users generating the interference does not include the other party's serving node. 12. The device according to claim 11, wherein the category determining submodule comprises: a threshold setting unit, configured to set a threshold for determining the type of interference between a relay user of a relay node and a direct transmission user; The category determination unit is used to determine the interference category of the relay users of the relay node to the direct transmission users: if the sum of the interference _w2 generated by all relay users in the same relay node accounts for the interference received by the direct transmission users The proportion of is greater than the threshold, then it is determined that the relay user of the relay node interferes with the direct transmission user as w ₂ ; If the proportion of the sum of the interference w ₂ generated by all relay users in the same relay node in the interference received by direct transmission users is not greater than the threshold, and the interference generated by all relay users in the same relay node The proportion of the sum of w ₁ in the interference suffered by the direct transmission user is greater than the threshold, then it is determined that the interference of the relay user of the relay node to the direct transmission user is w ₁ ; If the proportion of the sum of the interference w ₂ generated by all relay users in the same relay node in the interference received by direct transmission users is not greater than the threshold, and the interference generated by all relay users in the relay node The proportion of the sum of w ₁ in the interference received by the direct transmission users is not greater than the threshold, then it is determined that the interference of the relay users of the relay node to the direct transmission users is w _N . 13. The device according to claim 12, wherein the master base station corresponds to the first relay node and the second relay node, and the first relay node and the second relay node respectively correspond to the first relay user , the second relay user, the first relay node schedulable frequency set is U1, the second relay node schedulable frequency set is U2, and the establishment classification module divides the link bandwidth according to the schedulable frequency set The result is: Link bandwidth A: orthogonal to the U1 and U2 respectively; Link bandwidth B: orthogonal to the U1 and multiplexed with U2; Link bandwidth C: orthogonal to the U2 and multiplexed with U1; Link bandwidth D: multiplexed with U1 and U2 respectively. 14. The device according to claim 13, wherein the resource scheduling module comprises: An interference receiving submodule, configured to receive the interference category of the relay user to the direct transmission user determined by the category determination unit; The link allocation sub-module is used to allocate link bandwidth to direct transmission users according to the interference category received by the interference receiving sub-module: If the interference of the first relay user to the direct transmission user is w ₂ , and the interference of the second relay user to the direct transmission user is w ₂ , or if the interference of the first relay user to the direct transmission user is w ₁ , And the interference of the second relay user to the direct transmission user is w ₁ , then allocate the direct transmission user to use the link bandwidth A to interact with the donor base station; If the interference of the first relay user to the direct transmission user is w ₂ , and the interference of the second relay user to the direct transmission user is w ₁ or w _N , then allocate the direct transmission user to use the link bandwidth B and the donor base station interact; If the interference of the second relay user to the direct transmission user is w ₂ , and the interference of the first relay user to the direct transmission user is w ₁ or w _N , then allocate the direct transmission user to use the link bandwidth C and the donor base station interact; If the interference of the first relay user to the direct transmission user is w _N , and the interference of the second relay user to the direct transmission user is w _N , or if the interference of the first relay user to the direct transmission user is w _N , And the interference of the second relay user to the direct transmission user is w ₁ , or, if the interference of the first relay user to the direct transmission user is w ₁ , and the interference of the second relay user to the direct transmission user is w _N , Then allocate the direct transmission user to use the link bandwidth D to interact with the donor base station. 15. The device of claim 14, further comprising: The PF scheduling module is used to borrow frequency resources according to the proportional fair PF scheduling algorithm if the direct transmission users in link bandwidth A, link bandwidth B, link bandwidth C and link bandwidth D are in an unbalanced load state . 16. The device according to any one of claims 12-15, wherein the threshold is 20%. 17. A donor base station, comprising the apparatus for coordinating interference between access links between the relay node and the donor base station according to any one of claims 9-16.