WO2012088835A1

WO2012088835A1 - Control method for downlink interference among adjacent cells and system thereof

Info

Publication number: WO2012088835A1
Application number: PCT/CN2011/075244
Authority: WO
Inventors: 刘锟; 鲁照华; 罗薇; 李卫敏; 肖华华
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-12-30
Filing date: 2011-06-03
Publication date: 2012-07-05
Also published as: CN102547736A; CN102547736B

Abstract

A control method for downlink interference among adjacent cells and a system thereof are disclosed in the present invention, wherein the control method includes the following steps: the base stations (BSs) in the system are divided into a plurality of clusters, and every cluster includes more than two adjacent BSs; when scheduling the far-point major-lobe outer-loop users under a plurality of BSs which belong to different clusters and are adjacent to each other, every BS of the plurality of BSs schedules the far-point major-lobe outer-loop users under the BS to use resources different from resources used by the far-point major-lobe outer-loop users under other BSs of the plurality of BSs; when scheduling the near-point side-lobe outer-loop users under a plurality of BSs which belong to a same cluster and are adjacent to each other, every BS of the adjacent BSs schedules the near-point side-lobe outer-loop users under the BS to use resources different from resources used by the near-point side-lobe outer-loop users under other BSs of the adjacent BSs. With the present invention, the allocations of resources and power can be adjusted in real time based on the load variations of the sectors, and the frequency spectrum utilization of the whole system is improved.

Description

Method and system for controlling downlink interference between adjacent cells

Technical field

The present invention relates to the field of communications, and in particular, to a control method and system for downlink interference between adjacent cells.

Background technique

In a broadband wireless communication system, such as an Orthogonal Frequency Division Multiplexing (OFDM) system, downlinks used by base stations for downlink data transmission with different terminals in the same cell are orthogonal to each other. Therefore, intra-cell interference can be avoided. However, the downlink between different cells may not be orthogonal, so each terminal may be subject to downlink interference from base stations of other neighboring cells, i.e., inter-cell interference.

If inter-cell interference is severe, the system capacity will be reduced, especially the transmission capacity of the cell edge users is limited, which in turn affects the coverage capability of the system and the performance of the terminal. In order to overcome inter-cell interference, a Fractional Frequency Reuse (FFR) technology may be used to allocate different sub-band resources to terminals located in different cells to reduce inter-cell interference strength.

FIG. 1 is a schematic diagram of a frequency resource allocation manner of three adjacent sectors (sector 1, sector 2, sector 3) and a transmission power limitation of each frequency partition (Frequency Partition, FP for short).

The main principles of the traditional FFR are as follows: First, the available frequency resources are divided into N (N is a positive integer) FPs, and if N=4, the available frequency resources are divided into [FP FP ₂ FP ₃ FP ₄ ]. Wherein, FPj, FP ₂ FP and frequency reuse factor ₃ are 3 (can be expressed as Reuse3), represents FP ^ FP _2, ₃ FP and frequency resources may be allocated to a neighboring sector of three sectors Zone, and the other two sectors cannot use the frequency resource or need to use the frequency resource to limit the transmission power of the subcarrier using the frequency resource; the FP ₄ frequency reuse factor is 1 (ie Reuse 1 ), indicating The frequency resource can be used by all three adjacent sectors. Taking sector 1 as an example, when the subcarriers in FP1 use a higher transmit power P1-1, the subcarriers of sector 2 and sector 3 use a lower transmit power P2- in FP1. 1 and P3-1, which can reduce the subcarrier of sector 1 to be received in FP1 The interference strength; Similarly, Sector 2 and Sector 3 select FP2 and FP3 as frequency partitions for higher transmit power, respectively. Then, the base station corresponding to each of the three adjacent sectors is divided into an inner ring user and an outer ring user by the terminal selected as the serving base station. The outer ring user usually refers to a terminal with poor channel quality, long distance from the serving base station, and easy to be interfered by the neighboring cell. The inner ring user refers to a terminal with good channel quality, relatively close to the serving base station, and not easily interfered by the neighboring cell. Finally, the base station allocates the subcarriers with higher transmit power in the frequency partition to the outer loop users, and allocates the remaining resources to the inner loop users.

Traditional FFR can reduce the inter-frame interference strength by pre-subcarrier power adjustment and appropriate user scheduling algorithms. However, this method is a static interference coordination algorithm. When the load in the cell changes or the proportion of the internal and external loop users changes, the traditional FFR cannot be quickly adjusted according to the actual environment, thus reducing the performance of the system and affecting the entire system. Spectrum utilization.

Summary of the invention

The object of the present invention is to provide a control method and system for downlink interference between adjacent cells, so as to overcome the defect that the existing scheduling method cannot be dynamically adjusted.

To solve the above problem, the present invention provides a method for controlling downlink interference between adjacent cells, including:

Dividing a base station in the system into multiple clusters, each cluster includes more than two neighboring base stations; when scheduling a remote point main lobe outer ring user under a plurality of base stations belonging to different clusters and adjacent to each other, Each of the plurality of base stations schedules a user of a far-point main-lobe outer ring under the base station

When scheduling a near-point side-lobe outer ring user in a neighboring base station in the same cluster, each of the same-sequence neighboring base stations schedules a near-point side-lobe outer ring user under the base station to be in the same cluster The resources of the near-point side-lobe outer ring users under the other base stations in the neighboring base station are different resources.

When scheduling a user of a far-point main-lobe outer ring under a plurality of base stations belonging to different clusters and adjacent to each other, each of the plurality of base stations schedules a user of the far-point main-lobe outer ring under the base station And include: The available time-frequency two-dimensional resources are divided into N sub-resource blocks in the frequency domain, where each sub-resource block corresponds to one of the plurality of base stations; wherein, N is greater than or equal to the number of the plurality of base stations;

Each of the plurality of base stations belonging to different clusters and adjacent to each other schedules a far-point main-lobe outer ring user under the own base station to a sub-resource block corresponding to the base station.

When scheduling a near-point side-lobe outer ring user in a neighboring base station in the same cluster, each of the same-sequence neighboring base stations schedules a near-point side-lobe outer ring user under the base station to be in the same cluster The steps of the resources of the near-point side-lobe outer ring users of the neighboring base station in the neighboring base station include: preferentially scheduling the near-point side-lobe outer ring user under the base station to the far-point main-lobe outer ring user under the base station On the remaining resources of the sub-resource block, the near-point side-lobe outer ring users that are not scheduled on the remaining resources are scheduled on time-frequency resources that do not overlap with the N sub-resource blocks.

The above methods also include:

When scheduling the inner ring users under each base station in each cluster, each base station preferentially schedules the inner ring users under the base station to the far-point main-lobe outer ring users and the near-side side-lobe outer ring users under the base station. On the remaining resources of the resource block.

The above methods also include:

When scheduling the near-edge side-lobe outer ring users under each base station in each cluster, each base station schedules the near-point side-lobe outer ring users under the base station on time-frequency resources that do not overlap with the N sub-resource blocks. .

The above methods also include:

When scheduling the inner ring users under each base station in each cluster, each base station schedules the inner ring users under the local base station to be close to the N sub-resource blocks and the near-point side-lobe outer ring under the base station. The time-frequency resources on which the user's time-frequency resources do not overlap.

The power of the sub-resource blocks scheduled by the users of the far-point main-lobe outer ring of the base station in the system and the rates of the users of the near-side flap outer ring users and the inner ring users under the base station

When scheduling the near-edge side-lobe outer ring users under each base station in each cluster, each base station schedules the near-point side-lobe outer ring users under the base station on time-frequency resources that do not overlap with the N sub-resource blocks. Step The steps include:

After the base station in the cluster selects the scheduling resource to be allocated on the time-frequency resource that does not overlap the N sub-resource blocks, the base station in the next base station of the base station selects the scheduling resource to be allocated. The location information in the time-frequency resource that does not overlap with the N sub-resource blocks is sent to the upper-layer network single t;

After receiving the location information of the scheduling resource to be allocated sent by the base stations in the cluster, the upper layer network unit determines whether the location information of the scheduling resource to be allocated sent by different base stations overlaps in the frequency domain, if any And adjusting the scheduling resources to be allocated corresponding to the overlapped location information, so that the adjusted location information of the scheduling resources to be allocated by the base stations in the same cluster in the time-frequency resources that do not overlap with the N sub-resource blocks is If the frequency domain does not overlap, the location information of the scheduling resource to be allocated of each base station is separately sent to the corresponding base station; if not, the received location information is directly returned to the corresponding base station;

After the location information in the time-frequency resources that do not overlap the N sub-resource blocks, the near-side side-lobe outer ring user of the base station is scheduled according to the received location information.

When scheduling the near-edge side-lobe outer ring users under each base station in each cluster, each base station schedules the near-point side-lobe outer ring users under the base station on time-frequency resources that do not overlap with the N sub-resource blocks. The steps include:

The upper layer network unit allocates completely non-overlapping resources to the near-point side-lobe outer ring users under the base stations in the same cluster on the time-frequency resources that do not overlap with the N sub-resource blocks, and then allocates the resources in the The location information in the time-frequency resources in which the N sub-resource blocks do not overlap are respectively sent to each corresponding base station;

After receiving the location information sent by the upper layer network unit, each base station schedules a near-point side-lobe outer ring user under the base station according to the received location information.

Each base station in each cluster is a near-point side-lobe outer ring user under the base station and the N sub-resource blocks After the scheduling resource to be allocated is selected on the non-overlapping time-frequency resource, the location information of the scheduling resource to be allocated in the time-frequency resource that does not overlap with the N sub-resource blocks is sent to other base stations in the same cluster; as well as

After receiving the location information sent by other base stations in the same cluster, each base station performs time-frequency resources that do not overlap with the N sub-resource blocks when scheduling the near-point side-lobe outer ring users under the local base station. The other resources except the resources corresponding to the received location information are selected for scheduling.

The step of adjusting the scheduling resource to be allocated corresponding to the overlapped location information includes: the upper layer network unit reallocating resources to the near-point side-lobe outer ring user of the base station where the location information overlaps according to the scheduling priority of the base station; wherein, the scheduling priority of the base station is The level is determined by the number of near-edge side-lobe outer ring users in the base station or the current load of the base station.

The step of allocating completely non-overlapping resources to the near-point side-lobe outer ring users in each of the base stations in the same cluster on the time-frequency resource that does not overlap with the N sub-resource blocks includes: the upper-layer network unit according to the scheduling priority The near-side side-lobe outer ring users of the base stations in the same cluster allocate resources; wherein, the scheduling priority of each base station is determined by the number of near-edge side-ring outer ring users in the base station or the current load of the base station.

The above methods also include:

Each base station in the system determines the type of the terminal according to the received signal strength indication information (RSSI) and the signal to interference and noise ratio (SINR) reported by the terminal within the service range of the base station to the base station:

As reported by the terminal SINR value> set threshold SINR SINR _th, the inner terminal of a user;

If the SINR value reported by the terminal is ≤ SINR _th and the RSSI value reported by the terminal > the threshold RSSI _{th of the} set RSSI, the terminal is a near-point side-lobe outer ring user;

If the SINR value reported by the terminal is ≤ SINR _th and the RSSI value reported by the terminal is ≤ RSSI _th , the terminal is a far-point main-lobe outer ring user.

Correspondingly, the present invention further provides a control system for downlink interference between adjacent cells, including: a first subsystem and a base station;

The first subsystem is configured to: divide the base station in the control system into multiple clusters, and each cluster includes more than two neighboring base stations; The base station is configured to: when the base station of the far-point main-lobe outer ring under the base station is scheduled as a base station among the plurality of base stations that belong to different clusters and are adjacent to each other, the far-point main lobe under the base station is The ring user is scheduled to be different from the resources of the far-point main-lobe outer ring user under the other base stations of the plurality of base stations; and, as the base station in the same-cluster neighboring base station, next to the near-point to the base station When the flap outer ring user performs scheduling, the near-point side-lobe outer ring users under the base station are scheduled to be different resources from the resources of the near-point side-lobe outer ring users under the other base stations in the same cluster neighboring base station.

The base station is configured to schedule a remote point main-lobe outer ring user under the base station by: dividing the available time-frequency two-dimensional resource into N sub-resource blocks in a frequency domain, where each sub-resource block corresponds to the One of a plurality of base stations belonging to different clusters and adjacent to each other; wherein N is greater than or equal to the number of the plurality of base stations; and, scheduling the far-point main-lobe outer ring user under the base station to the base station Corresponding to a sub-resource block.

The base station is configured to schedule a near-point side-lobe outer ring user under the base station by: as a base station in the same-cluster neighboring base station, preferentially scheduling the near-point side-lobe outer ring user under the base station The near-point side-lobe outer ring user of the far-point main-lobe outer ring under the base station is scheduled to be on the remaining resources of the sub-resource block; and the near-side side-lobe outer ring user not scheduled on the remaining resource is not overlapped with the N sub-resource blocks On the time-frequency resources.

The base station is further configured to: when scheduling the inner ring users under the local base station, preferentially scheduling the inner ring users under the base station to the far-point main-lobe outer ring users and the near-side side-lobe outer ring users under the base station On the remaining resources of the resource block.

The base station is further configured to: when scheduling a near-point side-lobe outer ring user under the local base station, scheduling a near-point side-lobe outer ring user under the local base station on a time-frequency resource that does not overlap with the N sub-resource blocks .

The base station is further configured to: when scheduling the inner ring users in the local base station, scheduling the inner ring users under the local base station to be in a near-point side outer ring that does not overlap with the N sub-resource blocks and The time-frequency resources on which the user's time-frequency resources do not overlap.

The above control system further includes an upper network unit;

The base station is configured to schedule a near-point side-lobe outer ring user under the local base station to a time-frequency resource that does not overlap with the N sub-resource blocks by: a near-point side-lobe outer ring under the base station use After selecting the scheduling resource to be allocated on the time-frequency resource that does not overlap with the N sub-resource blocks, the location of the scheduling resource to be allocated in the time-frequency resource that does not overlap with the N sub-resource blocks Sending information to the upper layer network unit; and receiving, after receiving the location information of the scheduling resource to be allocated returned by the upper layer network unit in the time-frequency resource that does not overlap with the N sub-resource blocks, according to the received The location information is scheduled by the near-point side-lobe outer ring user under the base station;

The upper layer network unit is configured to: after receiving the location information of the scheduling resource to be allocated sent by the base stations in the same cluster, determine whether the location information of the scheduling resource to be allocated sent by different base stations in the same cluster is in the frequency domain. If there is, the scheduling resource to be allocated corresponding to the overlapped location information is adjusted, so that the scheduled resource to be allocated by each base station in the same cluster is not in the time-frequency resource that does not overlap with the N sub-resource blocks. The location information in the frequency domain does not overlap, and then the location information of the scheduling resources to be allocated of each base station is separately sent to the corresponding base station; if not, the received location information is directly returned to the corresponding base station.

The above control system further includes an upper network unit;

The upper layer network unit is configured to: allocate, on the time-frequency resource that does not overlap with the N sub-resource blocks, resources that are not overlapped by the near-point side-lobe outer ring users under the base stations in the same cluster, and then allocate the resources The location information in the time-frequency resource that does not overlap with the N sub-resource blocks is respectively sent to each corresponding base station;

The base station is configured to schedule a near-point side-lobe outer ring user under the local base station on a time-frequency resource that does not overlap with the N sub-resource blocks by: receiving the allocated resource sent by the upper-layer network unit After the location information in the time-frequency resource that does not overlap with the N sub-resource blocks, the near-point side-lobe outer ring user under the local base station is scheduled according to the received location information.

The base station is further configured to: after selecting a scheduling resource to be allocated on a time-frequency resource that does not overlap with the N sub-resource blocks, the near-point side-lobe outer ring user in the base station, the scheduling resource to be allocated is The location information in the time-frequency resource that does not overlap with the N sub-resource blocks is sent to other base stations in the same cluster;

The base station is configured to schedule a near-point side-lobe outer ring user under the local base station on a time-frequency resource that does not overlap with the N sub-resource blocks by: receiving a location sent by another base station in the same cluster After the information is scheduled, when the user of the near-point side-lobe outer ring under the base station is scheduled, the resource corresponding to the received location information is selected in the time-frequency resource that does not overlap with the N sub-resource blocks. Other resources are scheduled.

The invention can adjust the allocation of resources and power in real time according to the change of the sector load, and improve the spectrum utilization rate of the whole system. BRIEF abstract

1 is a schematic diagram of a frequency resource division manner of adjacent sectors of FFR in the prior art and a transmission power limitation condition of each frequency partition;

2 is a flowchart of a method for controlling downlink interference between adjacent cells in an embodiment of the present invention; FIG. 3 is a schematic diagram of a method for dividing a terminal according to an embodiment of the present invention;

4 is a schematic diagram of a resource division manner in an embodiment of the present invention;

5 is a schematic diagram of a network topology structure of clusters according to Embodiment 1 to Embodiment 7 of the present invention; FIG. 6 is a schematic diagram of partitioning resources in Application Example 8 of the present invention;

7 is a schematic diagram of intra-cluster base stations for allocating F4 resources for near-side side-lobe outer ring users according to the dynamic inter-cell interference coordination method proposed in Application Example 8 of the present invention;

8 is a schematic diagram of an intra-cluster base station for allocating F4 resources for a near-side side-lobe outer ring user and an inner-ring user in the dynamic inter-cell interference coordination method according to the eighth application example of the present invention;

9 is a schematic diagram of dividing resources in the application example 10 of the present invention;

FIG. 10 is a schematic diagram of the intra-cluster base station assigning F4 resources to the near-side side-lobe outer ring users and the inner-ring users in the dynamic inter-cell interference coordination algorithm proposed in the tenth application example of the present invention. Preferred embodiment of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

Generally, the mobile communication system includes at least an upper layer network unit, a base station, and a terminal. The base station that communicates with the terminal is called a serving base station; the upper layer network unit is a functional module of any network entity or network entity capable of data interaction with the base station. The upper network unit can be a BSC (Base Station Controller). In this embodiment, the method for controlling downlink interference between adjacent cells, as shown in FIG. 2, specifically includes the following steps: Step 10: The base station in the foregoing system is divided into multiple clusters, where each cluster includes at least two a neighboring base station; Step 20: When scheduling a remote point main-lobe outer ring user under a plurality of base stations belonging to different clusters and adjacent to each other, each of the plurality of base stations will be far from the base station Main flap outer ring user

Step 30: When scheduling a near-edge side-lobe outer ring user in a neighboring base station in the same cluster, each base station under the neighboring base station schedules a near-point side-lobe outer ring user under the base station to The resources of the near-point side-lobe outer ring users under the other base stations in the neighboring base station are different resources.

It should be noted that the execution steps of the above steps 20 and 30 are in no particular order.

In this context, the base station may perform type division according to the downlink channel quality information (CQI) reported by the terminal in the service range, and the CQI information is obtained by the terminal by measuring the downlink signal sent by the serving base station. The CQI information includes at least: RSSI (Received Signal Strength Indication) and SINR (Signal to Interference plus Noise Ratio) between the terminal and the base station. The base station compares the SINR value fed back by the terminal with a preset threshold value SINR _th . When it is determined that the SINR value of the terminal is greater than SINR _th , the base station determines that the terminal is an inner ring user; if the SINR value fed back by the terminal is smaller than Or equal to SINR _th , further comparing the RSSI value fed back by the terminal with a preset threshold value RSSI _th , and if it is determined that the RSSI value fed back by the terminal is greater than RSSI _th , determining that the terminal is a near-point sidelobe outer ring The user determines that the terminal is a far-point main-lobe outer-ring user if the RSSI value fed back by the terminal is less than or equal to RSSI _th .

In another embodiment, step 20 can be implemented in the following manner:

Step 201: The available time-frequency two-dimensional resource is divided into N sub-resource blocks in the frequency domain, where each sub-resource block corresponds to one of the plurality of base stations; where N is greater than or equal to the number of the plurality of base stations. Positive integer. As shown in FIG. 4, when N=3, the time-frequency two-dimensional resource block (Zonel) can be divided into sub-resource blocks F1, F2, and F3;

Step 202: For each of the plurality of base stations that belong to different clusters and are adjacent to each other, The user of the far-point main-lobe outer ring under the base station is scheduled to a sub-resource block corresponding to the base station. Since the sub-resource blocks of the far-point main-lobe outer ring users in different neighboring base stations are different, the co-channel interference between the far-point main-lobe outer ring users under the adjacent base stations can be avoided. . However, since the resources allocated to the near-edge side-lobe outer ring users of the base stations in the same cluster are not completely the same, the co-channel interference between the near-edge side-lobe outer ring users of the neighboring base stations in the same cluster can be avoided to some extent. .

In order to further improve resource utilization, if there is remaining resources on the sub-resource block corresponding to a certain base station after the completion of the step 202, the base station may preferentially schedule the near-point side-lobe outer ring user under the base station to the sub-resource block. If there are remaining resources on the resource block, the base station may preferentially schedule the inner ring users under the base station to the sub-resource blocks.

If there is no remaining resource on the sub-resource block corresponding to a certain base station after the completion of the step 202, the near-point side-lobe outer ring user under the local base station may be scheduled to be other than the time-frequency resource of the N sub-resource blocks. On other time-frequency resources, the second resource block (Zone2) as shown in FIG. The time T1 is the time of the split point in the time domain of the zone 1 and the zone 2, and the value of the T1 may be configured by one of the following: a standard default configuration; configured by the upper network element and sent to the base station; or configured by the base station;

In order to further improve the anti-interference performance of the outer ring users, the base station uses the transmit power of the sub-resource block and the second resource block allocated by the far-end main-lobe outer ring user of the base station to perform downlink data on other sub-resource blocks. The transmit power used during transmission. The value of the transmit power may be configured by one of the following: Standard default configuration; configured by the upper layer network unit and sent to each base station; configured by the base station itself.

Assume that the resource partitioning method shown in Figure 4 is used. The base station 1, the base station 2, and the base station 3 are three adjacent base stations in the same cluster. The sub-resource block allocated by the base station 1 to the far-point main-lobe outer-loop user of the base station is F1, and the sub-resource block allocated by the base station 2 to the far-point main-lobe outer-loop user of the base station is F2, and the base station 3 is the far point of the base station. The sub-resource block allocated by the main-ring outer ring user is F3, then the base station 1 uses higher transmit powers HiPwlBl and HiPw2Bl on F1 and F4, respectively, and uses lower transmit powers LoPwlBl and LoPw2Bl on F2 and F3, respectively; Base station 2 uses higher transmit powers HiPwlB2 and HiPw2B2 on F2 and F4, respectively, and lower transmit powers LoPwlB2 and LoPw2B2 on F3 and F1 respectively; base station 3 uses higher transmissions on F3 and F4, respectively. The powers HiPwlB3 and HiPw2B3 use lower transmit powers LoPwlB3 and LoPw2B3 on F1 and F2, respectively. For the inner ring user, because it is not susceptible to neighboring cell interference, it can be explained by the serving base station that in addition to the above N, the resource allocated by the serving base station to the inner ring user under the base station is different from the near side lobe of the base station. The resources allocated by the ring users do not overlap each other in the frequency domain.

In step 30, in order to realize the scheduling of the near-point side-lobe outer ring users under the local base station, the resources of the near-point side-lobe outer ring users under the other base stations adjacent to the base station in the same cluster may be different resources. Specifically, use one of the following methods:

Method 1 :

a, the base station is a near-point side-outer ring of the base station, and after selecting the scheduling resource to be allocated in the other time-frequency resources in which the N sub-resource blocks do not overlap, the scheduling resource to be allocated is in the other time-frequency resource. The location information is reported to the upper layer network unit; wherein, each base station in the system can use the same reporting period;

b. The upper layer network unit determines location information sent by other base stations in the same cluster according to the location information of the scheduled resource to be allocated sent by each base station to the other time-frequency resources. The information overlaps completely with the information in the frequency domain. If yes, the scheduling resources corresponding to the overlapping location information are re-adjusted, and the adjusted scheduling resources to be allocated do not completely overlap in the frequency domain, and may even not overlap at all, and then And transmitting the adjusted location information of the scheduling resource to be allocated in the other time-frequency resources to the corresponding base station; if not, directly returning the location information to the corresponding base station;

The location information in the location, and then according to the information, allocate resources to the near-point side-lobe outer ring user of the base station.

Method 2:

a. The upper layer network unit is unified as the near-point side-lobe outer ring user of each base station in the same cluster, and the scheduling resources are allocated in other time-frequency resources that do not overlap with the N sub-resource blocks, and then the scheduling resources are in the other time-frequency resources. The location information in the middle is sent to the corresponding base stations;

The location and number of resources allocated to each base station in the same cluster in the other time-frequency resources may be related to the number of near-edge side-ring outer loop users in each base station, that is, the more near-edge side-ring outer loop users in the base station , the more resources allocated to it in the frequency domain. b. The base station receives the location information sent by the upper layer network unit, and then allocates resources according to the information to the near-point side-lobe outer ring user of the base station.

Method 3:

a, the base station is a near-point side-lobe outer ring user of the base station, allocates resources in other time-frequency resources that do not overlap with the N sub-resource blocks, and then sends the location information of the allocated resources in the other time-frequency resources to Other base stations in the same cluster;

After receiving the location information sent by the base station, the other base stations in the same cluster select the other time-frequency resources that do not overlap with the N sub-resource blocks when allocating resources to the near-point side-lobe outer ring users of the base station. Other resources than the resources corresponding to the received location information are allocated.

In this embodiment, a control system for downlink interference between adjacent cells includes: a first subsystem and a base station;

The first subsystem is configured to: divide the base station in the control system into multiple clusters, and each cluster includes more than two neighboring base stations;

The base station is configured to: when a base station in a plurality of base stations that belong to different clusters and are adjacent to each other, when the user of the far-point main-lobe outer ring under the base station is scheduled, the far-point master under the base station The out-of-valve user is scheduled to be different from the resources of the far-point main-lobe outer ring users of the other base stations in the plurality of base stations; and, as the base stations in the neighboring base stations in the same cluster, under the base station When the near-edge side-outer ring user performs scheduling, the near-point side-lobe outer ring users under the base station are scheduled to be different resources from the resources of the near-point side-lobe outer ring users under other base stations in the neighboring base stations.

Preferably,

The base station divides the available time-frequency two-dimensional resources into N sub-resource blocks in the frequency domain, and each sub-resource block corresponds to the sub-group belonging to different clusters when scheduling the user of the far-point main-lobe outer ring under the base station And one of the plurality of base stations adjacent to each other; wherein N is greater than or equal to the number of the plurality of base stations; and the base station of the plurality of base stations belonging to different clusters and adjacent to each other, and the base station The lower far-point main-lobe outer-loop user is scheduled to a sub-resource block corresponding to the base station.

Preferably,

When the base station is used as a base station in a neighboring base station in the same cluster to schedule a near-point side-lobe outer ring user under the base station, the base station is preferentially scheduled to be outside the far-point main lobe of the base station. Ring On the remaining resources of the sub-resource block where the user is located, the near-point side-lobe outer ring users that are not scheduled on the remaining resources are scheduled on other time-frequency resources that do not overlap with the N sub-resource blocks.

Preferably,

The base station is further configured to: schedule a near-point side-lobe outer ring user under the local base station to other time-frequency resources that do not overlap with the N sub-resource blocks when scheduling a near-point side-lobe outer ring user under the base station; on.

Preferably,

The base station is further configured to: when the inner ring user under the local base station is scheduled, schedule the inner ring user under the local base station to be in a near-point side outer ring that does not overlap with the N sub-resource blocks and The other time-frequency resources where the time-frequency resources of the user do not overlap.

Preferably, the above system may further include an upper layer network unit;

The base station is configured to schedule a near-point side-lobe outer ring user under the local base station to other time-frequency resources that do not overlap with the N sub-resource blocks by: a near-point side-lobe outer ring under the base station After the user selects the scheduling resource to be allocated on the other time-frequency resources that do not overlap with the N sub-resource blocks, the location information of the scheduling resource to be allocated in the other time-frequency resource is sent to the upper-layer network unit. And after receiving the location information of the scheduling resource to be allocated returned by the upper layer network unit in the other time-frequency resource, scheduling the near-point side-lobe outer ring user of the base station according to the received location information;

The upper layer network unit is configured to: determine, according to the location information of the scheduling resource to be allocated sent by each base station in the same cluster in the other time-frequency resource, for each location information, determine whether there is any in the same cluster The location information of the to-be-allocated scheduling resource sent by the other base station overlaps with the location information in the frequency domain, and if yes, the scheduling resource to be allocated corresponding to the overlapping location information is adjusted, so that the adjusted scheduling resources to be allocated by each base station are adjusted. The location information in the other time-frequency resources that do not overlap with the N sub-resource blocks does not overlap in the frequency domain, and then the adjusted scheduling resources to be allocated are The location information in the other time-frequency resources is respectively sent to the corresponding base station; if not, the location information is directly returned to the corresponding base station.

Preferably, the above system may further include an upper layer network unit;

The upper layer network unit is configured to: allocate, on the other time-frequency resources that do not overlap with the N sub-resource blocks, the resources of the near-point side-lobe outer ring under each base station in the same cluster, and then allocate the resources The location information of the resource in the other time-frequency resources is respectively sent to each corresponding base station; the base station is configured to schedule the near-point side-lobe outer ring user under the base station to be in the N sub-resource block by: On the other time-frequency resources that do not overlap: after receiving the location information of the allocated resources sent by the upper-layer network unit in the other time-frequency resources, scheduling the near-point side-lobe outer ring users under the base station according to the location information .

Preferably, the above system may also have the following features:

The base station may be further configured to: after the near-point side-lobe outer ring user of the base station selects the scheduling resource to be allocated on other time-frequency resources that do not overlap with the N sub-resource blocks, the scheduling to be allocated The location information of the resources in the other time-frequency resources is sent to other base stations in the same cluster;

The base station is configured to schedule a near-point side-lobe outer ring user under the local base station to other time-frequency resources that do not overlap with the N sub-resource blocks by: receiving other base stations in the same cluster After the location information is used, when scheduling the near-point side-lobe outer ring user under the local base station, selecting the resource corresponding to the received location information in the other time-frequency resources that do not overlap with the N sub-resource blocks Other resources are scheduled.

The above method will be further explained below with several application examples.

Application example one

The mobile communication system includes a plurality of clusters, each of which includes K base stations, and the base stations in the clusters can exchange information with the upper network unit. In this example, 4 is set to K=3. As shown in FIG. 5, one cluster includes three base stations, base station 1 (BS1) corresponds to sector 1, base station 2 (BS2) corresponds to sector 2, and base station 3 (BS3) corresponds to Sector 3. Both BS1, BS2 and BS3 can interact with the upper network element.

The following describes the implementation steps of the inter-cell interference control method, including:

(1) Divide the available resources from the time domain into two resources according to the resource partitioning method shown in FIG. The first resource block includes sub-resource blocks F1, F2, and F3; the second resource block includes resource F4.

Wherein, T1 is a division point of the first resource block and the second resource block in the time domain, and the value of T1 may be the time occupied by one or more time domain symbols, and the value may be configured by the upper network element BSC and sent To base station 1, base station 2 and base station 3.

It should be noted that the value of T1 is not limited to the method given in this example, and may be configured by a standard default configuration or by a base station.

(2) Allocating transmit power for three base stations (base station 1, base station 2, and base station 3) within the cluster. For base station 1, F1 and F4 respectively use higher transmit powers HiPwlBl and HiPw2Bl, and F2 and F3 respectively use lower transmit powers LoPwlBl and LoPw2Bl;

For base station 2, F2 and F4 use higher transmit powers HiPwlB2 and HiPw2B2, respectively.

F3 and F1 respectively use lower transmit powers LoPwlB2 and LoPw2B2;

For base station 3, F3 and F4 respectively use higher transmit powers HiPwlB3 and HiPw2B3, and F1 and F2 respectively use lower transmit powers LoPwlB3 and LoPw2B3;

In this application example, the transmission power values of the base station 1, the base station 2, and the base station 3 at F1, F2, F3, and F4 are configured by the BSC and transmitted to the base station 1, the base station 2, and the base station 3.

(3) Each base station in the cluster divides the terminal that selects the base station as the serving base station into an inner ring user, a near-side side-lobe outer ring user, and a far-point main-lobe outer ring user, as shown in FIG.

The following describes the specific division method by taking the base station 1 as an example, and the method is also applicable to the base station 2 and the base station.

3:

Step 31: The terminal that selects the base station 1 as the serving base station feeds back downlink channel quality information (CQI) to the base station 1, and the CQI information is obtained by the terminal by measuring the downlink signal sent by the serving base station. Wherein, the CQI includes at least: RSSI and SINR;

Step 32: The base station 1 compares the SINR value fed back by the terminal with a preset threshold SINR _th . When it is determined that the SINR value of the terminal is greater than SINR _th , it is determined that the terminal is an inner ring user; when the SINR value is less than or When it is equal to SINR _th , it is determined that the terminal is an outer ring user;

Step 33: The base station 1 compares the RSSI value fed back by the outer loop user with a preset threshold value RSSI _th . If it is determined that the RSSI value of the outer loop user is greater than RSSI _th , it is determined that the outer loop user is next to the near point. The outer loop user, when the RSSI value is less than or equal to RSSI _th , determine that the outer loop user is far away Main flap outer ring user.

In this example, the values of SINR _th and RSSI _th are obtained by any one of the following methods: a standard default configuration; configured by an upper layer network unit, and sent to a base station; or configured by a base station;

(4) Each base station in the cluster allocates high-power resources in the first resource block to the far-point main-lobe outer ring user of the base station (in the case of the base station 1 as an example, the F1 resource is allocated). If the high-power resource remains after the resource is allocated to the far-end main-lobe outer-ring user, it is allocated to the near-point side-lobe outer ring user of the base station. If the resources of the high-power resources in the first resource block remain after the resources of the near-point side-outer ring of the base station are allocated, the inner ring users of the base station are allocated;

(5) each base station in the cluster selects a resource to be allocated by the near-point side-lobe outer ring user of the base station in F4, and sends the location information of the resource in the F4 to the upper-layer network unit BSC;

This application example assumes that the F4 resource can be divided into 12 scheduling units (Blockl-Block2), each of which is a time-frequency two-dimensional resource block. Assume that base station 1 wants to adjust Block1 to Block4, base station 2 wants to schedule Block5 to Block8, and base station 3 wants to schedule Block9 to Blockl 2;

In this application example, it is assumed that the base station transmits a F4 resource scheduling situation to the BSC by using a bitmap. Then, the base station 1 transmits 1111 0000 0000 to the BSC, and the base station 2 transmits 0000 1111 0000 to the BSC, and the base station 3 transmits 0000 0000. 1111 to BSC;

(6) The BSC receives the scheduling of the F4 resources sent by the base stations in the same cluster, and determines that the scheduling of the F4 resources between the base stations does not need to be adjusted, then sends 1111 0000 0000 to the base station 1 and sends 0000 1111 0000 to the base station 2, Send 0000 0000 1111 to base station 3.

(7) The base station receives the F4 resource allocation information sent by the BSC, and then allocates resources in the F4 resource by the near-point side-lobe outer ring user of the base station according to the information.

Application Example 2 In this example, in the downlink interference control method between adjacent cells, steps (1) to (4) and application examples are not mentioned here. The next steps include:

This application example assumes that the F4 resource can be divided into 12 scheduling units (Blockl- Blockl2), where each scheduling unit is a time-frequency two-dimensional resource block. Assume that base station 1 wants to schedule Block1 to Block6, base station 2 wants to schedule Block5 to Block8, and base station 3 wants to schedule Block9 to Blockl2.

In this application example, it is assumed that the base station sends a F4 resource scheduling situation to the BSC by using a bitmap, and the base station 1 sends 1111 1100 0000 to the BSC, and the base station 2 sends 0000 1111 0000 to the BSC, and the base station 3 sends 0000 0000 1111 to the BSC;

(6) The BSC receives the scheduling of the F4 resources sent by the base stations in the cluster, and finds that both the base station 1 and the base station 2 want to schedule Block 5 and Block 6, and it is necessary to coordinate the use of Block 5 and Block 6 between the base station 1 and the base station 2.

In this application example, it is assumed that the load of the base station 1 is severe and the bandwidth is very tight, and the base station is

The load condition of 2 is not serious, and the bandwidth is wider. The BSC decides to allocate Block 5 and Block 6 resources to the base station 1 for use, send 1111 1100 0000 to the base station 1, send 0000 0011 0000 to the base station 2, and send 0000 0000 1111 to the base station 3;

(7) The base station receives the F4 resource allocation information sent by the BSC, and allocates resources in the F4 resource according to the near-point side-lobe outer ring user of the base station according to the information.

Application example three

In this example, in the downlink interference control method between adjacent cells, steps (1) to (4) and application examples are not mentioned here. The next steps include:

This application example assumes that the F4 resource can be divided into 12 scheduling units (Blockl-Block2), each of which is a time-frequency two-dimensional resource block. Assume that base station 1 wants to schedule Block1 to Block6, base station 2 wants to schedule Block5 to Block8, and base station 3 wants to schedule Block9 to Blockl0.

In this application example, it is assumed that the base station transmits the scheduling of the F4 resource to the BSC in the form of a bitmap. Then, the base station 1 transmits 1111 1100 0000 to the BSC, and the base station 2 transmits 0000 1111 0000 to the BSC, and the base station 3 transmits 0000 0000 1100 to the BSC.

(6) The BSC receives the scheduling of the F4 resources sent by the base stations in the cluster, and discovers the base station 1 and If base station 2 wants to schedule Block 5 and Block 6, it is necessary to coordinate the use of Block 5 and Block 6 between base station 1 and base station 2.

In this application example, assuming that the load condition of the base station 1 is severe and the bandwidth is very tight, the BSC decides to allocate the Block 5 and Block 6 resources to the base station 1 for use, and allocates the unscheduled Block 1 and Block 1 to the base station 2. The BSC sends 1111 1100 0000 to the base station 1, transmits 0000 0011 0011 to the base station 2, and transmits 0000 0000 1100 to the base station 3.

Application example four

(5) The BSC allocates F4 resources to the near-point side-lobe outer ring users of each base station in the same cluster.

This application example assumes that the F4 resource can be divided into 12 scheduling units (Blockl-Block2), each of which is a time-frequency two-dimensional resource block. The base station 1 has K1 one-point side-lobe outer ring users to be scheduled, the base station 2 has two near-point side-lobe outer ring users to be scheduled, and the base station 3 has three near-point side-lobe outer ring users to be scheduled, then the BSC According to the ratio of Kl: K2: K3, the resources of F4 are allocated to the three base stations, and the ratio of K1: K2: K3: K3 is 1: 2:3, then the base station 1 can allocate two scheduling units Blockl-Block2, then the base station 2 can Assigning 4 scheduling units Block3-Block6, the base station 3 can allocate 6 scheduling units Block7-Block1;

In this application example, it is assumed that the BSC uses the bitmap method to schedule the F4 resource scheduling to the base station, and the BSC sends 1100 0000 0000 to the base station 1, 0011 1100 0000 to the base station 2, and 0000 0011 1111 to the base station 3.

The BSC is an index of the block of the F4 resource selected by each base station, and may be used not only in the order allocation manner but also according to the channel quality information of the near-side side-lobe outer ring user to be scheduled on each block. , select the optimal block index for each base station, and send it to the base station.

(6) The base station receives the F4 resource allocation information sent by the BSC, and according to the information, the near-point side-lobe outer ring user of the base station allocates resources in the F4 resource. Application example five

(5) The BSC allocates F4 resources to the near-point side-lobe outer ring users of each base station in the cluster.

This application example assumes that the F4 resource can be divided into 12 scheduling units (Blockl-

Blockl2), where each scheduling unit is a time-frequency two-dimensional resource block. The base station 1 has K1 one-point side-lobe outer ring users to be scheduled, the base station 2 has two near-point side-lobe outer ring users to be scheduled, and the base station 3 has three near-point side-lobe outer ring users to be scheduled, then the BSC According to the ratio of Kl: K2: K3, the resources of F4 are allocated to three base stations, and the ratio of H1 to K1: K2: K3 is 1: 2:3, then base station 1 can allocate 2 scheduling units, then base station 2 can allocate 4 The scheduling unit, then the base station 3 can allocate 6 scheduling units.

In this application example, it is assumed that the BSC can directly obtain scheduling information of all users of the near-point side-lobe outer ring to be scheduled (including the user index information to be scheduled and the number of resource blocks required), and the channel quality information in Blockl~Blockl2. Then, the BSC will directly allocate F4 resources to the near-point side-lobe outer ring users of each base station, and send the allocated result to the base station.

(6) The base station receives the F4 resource allocation information sent by the BSC, and allocates resources in the F4 resource according to the near-point side-lobe outer ring user of the base station according to the information.

Application example six

(5) Each base station in the cluster selects a resource to be allocated by the near-point side-lobe outer ring user of the base station in F4, and transmits the location information of the resource in F4 to other base stations in the same cluster.

This application example assumes that the F4 resource can be divided into 12 scheduling units (Blockl-Blockl2), each of which is a time-frequency two-dimensional resource block. Base station 1 wants to schedule Block1 to Block6, base station 2 wants to schedule Block5 to Block8, and base station 3 wants to schedule Block9 to Blockl0.

In this application example, it is assumed that the base station transmits a F4 resource scheduling situation to other base stations by using a bitmap. Then, the base station 1 transmits 1111 1100 0000 to the base station 2 and the base station 3, and the base station 2 transmits 0000 1111 0000 to the base station 1 and the base station 3. Base station 3 transmits 0000 0000 1100 to base station 1 and base station 2.

(6) The base station in the cluster receives the scheduling of the F4 resources sent by other base stations. In this application example, after the base station 1 receives the scheduling situation of the F4 resources sent by the base station 2 and the base station 3, it is found that the base station 2 and itself want to allocate the Block 5 and the Block 6 to the terminal in the base station, and the base station 1 according to the advance The received scheduling priority determines whether to abandon the use of Block5 and Block6.

The scheduling priority determines the priority order that the base stations in the cluster enjoy on the same resource. The higher the scheduling priority, the priority is to obtain the resource usage rights. The value of the priority may be a default configuration, or configured by the base station, or sent by the upper layer network unit BSC to the base station.

In this application example, assuming that the scheduling priority of the base station 1 is the highest, the base station 1 does not change the scheduling of resources. When the base station 2 receives the scheduling of the F4 resources sent by the base station 1 and the base station 3, and finds that both the base station 1 and the user want to allocate the Block 5 and the Block 6 to the terminal in the base station, the base station 2 needs to change the scheduling of the resources, and will not Block 5 and Block 6 are assigned to terminals in the base station.

(7) The base station allocates F4 resources to the near-side side-lobe outer ring users of the base station according to the adjusted F4 resource allocation information.

Application example eight

In this application example, the BSC allocates F4 resources to the near-point side-lobe outer ring users of the respective base stations according to a predetermined scheduling priority.

The scheduling priority may be determined according to the number of near-edge side-lobe outer ring users of the base station in the cluster, and the more the number of the near-edge side-outer ring users, the higher the scheduling priority of the base station; or the load condition of each base station is determined. The more heavily loaded the base station, the higher the scheduling priority.

In this application example, it is assumed that the highest priority of the base station scheduling in the cluster is base station 1, followed by base station 2, and the lowest is base station 3. As shown in FIG. 6, the F4 resource can be divided into three resource blocks (F4-l, F4-2, F4-3), wherein each scheduling unit is a time-frequency two-dimensional resource block. As shown in FIG. 7, the BSC allocates resource blocks F4-1 and F4-2 for the near-point side-lobe outer ring users of the base station 1, and allocates resource blocks F4-1 and F4 for the near-point side-lobe outer ring users of the base station 2. -3 for the near-point side-lobe outer ring user of base station 3. Resource blocks F4-2 and F4-3 are allocated.

(6) As shown in FIG. 7, the base station allocates F4 resources to the near-point side-lobe outer ring users of the base station according to the F4 resource allocation information determined by the BSC.

Application example nine

(5) The BSC allocates F4 resources to the near-point side-lobe outer ring users and inner-ring users of each base station in the cluster. In this application example, the BSC allocates F4 resources to the near-point side-lobe outer ring users of the respective base stations according to a predetermined scheduling priority. Among them, the definition of scheduling priority is the same as the previous example.

In this application example, it is assumed that the highest priority of the base station scheduling in the cluster is base station 1, followed by base station 2, and the lowest is base station 3. The F4 resource can be divided into three resource blocks (?4-1, ?4-2, ?4-3), each of which is a time-frequency two-dimensional resource block. As shown in FIG. 8, the BSC allocates resource blocks F4-1 and F4-2 to the base station 1 for the near-point side-lobe outer ring users, and allocates resource blocks F4-1 and F4-3 to the base station 2 for the near point. The flap outer loop user allocates resource blocks F4-2 and F4-3 to base station 3 for near-point side-lobe outer loop users.

In addition, the BSC allocates resource blocks F4-1 and F4-2 to the inner ring users for the base station 1, allocates the resource blocks F4-1 and F4-3 to the inner ring users for the base station 2, and allocates resource blocks for the base station 3. F4-2 and F4-3 are used for inner loop users.

(6) After receiving the F4 resource allocation information according to the BSC, the base station allocates F4 to the near-side side-outer ring user and the inner ring user according to the F4 resource allocation method shown in FIG. 7 according to the terminal to be scheduled in the base station. Resources. Some of the resources of the base station F4 cannot be used by the inner ring users of the base station once they are used by the near-edge side-ring outer ring users; and vice versa.

Application example ten

After applying any of the above application example 1 to application example 9 to allocate resources to the near-point side-lobe outer ring users of the base station, the following steps may also be performed:

When the intra-cluster base station allocates the F4 resource to the near-point side-lobe outer ring user of the base station, the F4 resource is allocated to the inner ring user of the base station.

As shown in Figure 9, it is assumed that the F4 resources can be divided into six resource blocks (F4-1 F4-6). As shown in FIG. 10, the resources allocated to the near-edge side-lobe outer ring users of the base station 1 are F4-1 and F4-3, and the resources allocated by the near-point side-lobe outer ring users of the base station 2 are F4-4. And F4-5, the resources allocated by the near-point side-lobe outer ring users of the base station 3 are F4-2 and F4-6, and the base station 1 allocates resources F4-5 and F4-6 for its inner ring users, and the base station 2 The inner loop users allocate resources F4-1 and F4-2, and base station 3 allocates resources F4-3 and F4-4 to its inner loop users.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. In view of the present invention, various other modifications, equivalents, improvements, etc., should be made without departing from the spirit and scope of the invention. It is included in the scope of protection of the present invention.

Industrial applicability

Compared with the prior art, the present invention can adjust the allocation of resources and power in real time according to the change of the sector load, and improve the spectrum utilization rate of the entire system.

Claims

Claim

A method for controlling downlink interference between adjacent cells, comprising:

2. The method according to claim 1, wherein each of the plurality of base stations is scheduled when a user of a far-point main-lobe outer ring under a plurality of base stations belonging to different clusters and adjacent to each other is scheduled Scheduling the user of the far-point main-lobe outer ring under the base station includes:

The available time-frequency two-dimensional resources are divided into N sub-resource blocks in the frequency domain, where each sub-resource block corresponds to one of the plurality of base stations; wherein, N is greater than or equal to the number of the plurality of base stations;

Each of the plurality of base stations schedules a far-point main-lobe outer ring user under the base station to a sub-resource block corresponding to the base station.

3. The method of claim 2, wherein

When scheduling a near-point side-lobe outer ring user in a neighboring base station in the same cluster, each of the same-sequence neighboring base stations schedules a near-point side-lobe outer ring user under the base station in the same cluster The steps on the resources of the near-point side-lobe outer ring users under the other base stations in the neighboring base stations include:

Each of the neighboring base stations in the same cluster preferentially schedules the near-point side-lobe outer ring user under the base station to the remaining resources of the sub-resource block in which the remote-point main-lobe outer ring user of the base station is located, and is not scheduled in The near-point side-lobe outer ring user on the remaining resources is scheduled on a time-frequency resource that does not overlap with the N sub-resource blocks.

4. The method of claim 3, further comprising:

5. The method of claim 2, further comprising:

6. The method of claim 3 or 5, further comprising:

7. The method according to any one of claims 2 to 5, wherein

The transmit power used by each base station in the system in the sub-resource block scheduled by the user of the far-point main-lobe outer ring under the local base station and the user of the near-point side-lobe outer ring user and the inner ring under the base station The transmit power used on the resources received is higher than the transmit power used in downlink data transmission on other resources.

8. The method of claim 5, wherein

After the base station in the cluster selects the scheduling resource to be allocated on the time-frequency resource that does not overlap the N sub-resource blocks, the base station in the next base station of the base station selects the scheduling resource to be allocated. And the location information in the time-frequency resource that does not overlap with the N sub-resource blocks is sent to the upper-layer network unit;

After receiving the location information of the scheduling resource to be allocated sent by the base stations in the cluster, the upper layer network unit determines whether the location information of the scheduling resource to be allocated sent by different base stations overlaps in the frequency domain, if any And adjusting the scheduling resource to be allocated corresponding to the overlapped location information, so that the scheduled scheduling resources to be allocated by the base stations in the same cluster do not overlap with the N sub-resource blocks. The location information in the time-frequency resource does not overlap in the frequency domain, and then the location information of the scheduling resource to be allocated of each base station is separately sent to the corresponding base station; if not, the received location information is directly returned to the Corresponding base station;

9. The method of claim 5, wherein

10. The method of claim 5, wherein

After the base station of each cluster in the cluster selects the scheduling resource to be allocated on the time-frequency resource that does not overlap the N sub-resource blocks, the short-range side-lobe outer ring user in the current base station, the scheduling resource to be allocated is located in the The location information in the time-frequency resource that does not overlap with the N sub-resource blocks is sent to other base stations in the same cluster;

11. The method according to claim 8, wherein the adjustment of the position information corresponding to the overlapping position is adjusted The steps of allocating scheduling resources include:

The upper network unit re-allocates resources according to the scheduling priority of the base station for the near-point side-lobe outer ring user of the base station where the location information overlaps; wherein the scheduling priority of the base station is determined by the number of base stations of the near-edge side-ring outer ring in the base station or the base station The current load is determined.

12. The method of claim 9, wherein

The step of allocating resources that are completely non-overlapping to the near-point side-lobe outer ring users under the base stations in the same cluster on the time-frequency resources that do not overlap with the N sub-resource blocks includes:

The upper network unit allocates resources according to a scheduling priority of a near-point side-lobe outer ring user of each base station in the same cluster; wherein, the scheduling priority of each base station is determined by the number of near-edge side-lobe outer ring users in the base station or the current base station The load is determined.

13. The method of claim 1 further comprising:

A control system for downlink interference between adjacent cells, comprising: a first subsystem and a base station;

The first subsystem is configured to divide the base station in the control system into a plurality of clusters, each of which includes more than two adjacent base stations;

The base station is configured to:

When a base station of a plurality of base stations belonging to different clusters and adjacent to each other is scheduled, when the remote point main-lobe outer ring user under the base station is scheduled, the far-point main-lobe outer ring user is scheduled to be in the plurality of Base When the base station in the neighboring base station of the same cluster is scheduled, when scheduling the near-point side-lobe outer ring user under the base station, scheduling the near-point side-lobe outer ring user to be in other base stations in the same base station as the same cluster The near-point side-lobe outer ring of the user's resources is on different resources.

15. The control system according to claim 14, wherein

16. The control system according to claim 15, wherein

17. The control system according to claim 16, wherein

18. The control system according to claim 15, wherein

19. The control system according to claim 16 or 18, wherein

The control system of claim 18, further comprising an upper layer network unit; the base station is configured to schedule a near-point side-lobe outer ring user under the base station to not overlap with the N sub-resource blocks by: On the time-frequency resource: after the near-point side-lobe outer ring user under the base station selects the scheduling resource to be allocated on the time-frequency resource that does not overlap with the N sub-resource blocks, the scheduling resource to be allocated is The location information in the time-frequency resource that does not overlap with the N sub-resource blocks is sent to the upper-layer network unit; and the scheduling resource to be allocated returned by the upper-layer network unit is received in the N and the N After the location information in the time-frequency resource that does not overlap the sub-resource blocks, the near-point side-lobe outer ring user under the base station is scheduled according to the received location information;

The upper layer network unit is configured to: after receiving the location information of the scheduling resource to be allocated sent by the base stations in the same cluster, determine whether the location information of the scheduling resource to be allocated sent by different base stations overlaps in the frequency domain If yes, adjusting the scheduling resources to be allocated corresponding to the overlapping location information, so that the scheduling resources to be allocated by the base stations in the same cluster are adjusted in the time-frequency resources that do not overlap with the N sub-resource blocks. The location information does not overlap in the frequency domain, and then the location information of the scheduling resources to be allocated of each base station is separately sent to the corresponding base station; if not, the received location information is directly returned to the corresponding base station.

21. The control system of claim 18, further comprising an upper network unit;

22. The control system according to claim 18, wherein

The base station is further configured to: after selecting a scheduling resource to be allocated on a time-frequency resource that does not overlap with the N sub-resource blocks, the near-point side-lobe outer ring user in the base station, the scheduling resource to be allocated is The location information in the time-frequency resource that does not overlap with the N sub-resource blocks is sent to the same cluster His base station;

The base station is configured to schedule a near-point side-lobe outer ring user under the local base station on a time-frequency resource that does not overlap with the N sub-resource blocks by: receiving a location sent by another base station in the same cluster After the information is scheduled, when the near-point side-lobe outer ring user under the base station is scheduled, the resource corresponding to the received location information is selected in the time-frequency resource that does not overlap with the N sub-resource blocks. Other resources are scheduled.