WO2015024211A1

WO2015024211A1 - Interference coordination method and device

Info

Publication number: WO2015024211A1
Application number: PCT/CN2013/081941
Authority: WO
Inventors: 夏伟娟; 胡军; 钱颖
Original assignee: 华为技术有限公司
Priority date: 2013-08-21
Filing date: 2013-08-21
Publication date: 2015-02-26
Also published as: CN103733666A

Abstract

Disclosed are an interference coordination method and device, which relate to the field of communication systems and can reduce interference among adjacent cells and lower the implementation complexity in ICI control through an ICIC technology. The method comprises: first, a first base station acquiring a power reduction ratio of M resource blocks (RBs) for a first cell to conduct information transmission; then, according to the power reduction ratio, the first base station determining N RBs for power reduction from the M RBs of the first cell; and finally, the first base station conducting information transmission using N RBs, subjected to power reduction processing, of the first cell, so as to enable a second base station to schedule an edge user equipment on N RBs corresponding to a second cell and to conduct information transmission. The embodiments of the present invention are applicable to reduce interference generated among adjacent cells during same-frequency multiplexing.

Description

Method and device for interference coordination

Technical field

The present invention relates to the field of communication systems, and in particular, to a method and apparatus for interference coordination. Background technique

In a mobile network where multiple cells are deployed, inter-cell interference (ICI) occurs when adjacent cells multiplex the same frequency resources. ₀ Current ICI control technologies include: interference randomization technology, interference cancellation Inter-Cell Interference Coordination (ICIC) Among them, ICIC technology has the best control effect on ICI.

At present, when the ICI is controlled by the ICIC technology, the frequency band is first divided into a plurality of frequency reuse sets, and then different frequency reuse sets are configured for the edge user equipments of the neighboring cells, so that the edge user equipments of the neighboring cells are multiplexed. Different frequency resources, thereby reducing interference to edge user equipment in neighboring cells.

However, when the ICI is controlled by the ICIC technology, the central network element needs to obtain the interference of each cell in the entire network according to the number of user equipments in each cell and the interference received by each user equipment, and according to the Interference conditions select the optimal frequency band configuration mode for cell band configuration, which results in high implementation complexity of ICI control through the ICIC technology. Moreover, when ICI control is performed by ICIC technology, the division of the frequency reuse set will cause additional signals. The overhead is reduced, resulting in reduced system efficiency.

Summary of the invention

The embodiment of the invention provides a method and a device for interference coordination, which can solve the problem of high complexity when performing ICI control by using the existing ICIC technology. The technical solution used in the embodiments of the present invention is:

In a first aspect, an embodiment of the present invention provides a method for interference coordination, including:

The first base station acquires a power reduction ratio of the M resource blocks RB that the first cell performs information transmission, The M is a positive integer, and the first cell is a cell managed by the first base station; according to the power reduction ratio, the first base station determines a power reduction from the M RBs of the first cell. N RBs, N is a positive integer less than or equal to M;

The first base station performs information transmission by using the N RBs that are processed by the first cell, so that the second base station schedules edge user equipments on the N RBs corresponding to the second cell, and performs information transmission, where The second cell is a cell managed by the second base station, where the first cell and the second cell are adjacent to each other, and the N RBs corresponding to the second cell are the same as the first cell. The RBs of the reduced power N RB frequencies are consistent.

In a first implementation manner of the first aspect, the ratio of power reduction of the M resource blocks RB that the first base station obtains information transmission by the first cell includes:

Obtaining, by the first base station, a ratio of power reduction of the M RBs of the first cell according to load information of the first cell; or

And the first base station acquires a power reduction ratio of the M RBs of the first cell according to a proportion of edge user equipments in the second cell.

With reference to the first aspect, or the first implementation of the first aspect, in the second implementation manner of the first aspect, the determining, by the first base station, the The N RBs that determine the power reduction in the M RBs include:

Determining, by the first base station, N RBs of reduced power from the M RBs of the first cell, according to the power reduction ratio and the frequency of the M RBs respectively being low to high; or Determining, by the first base station, N RBs of reduced power from the M RBs of the first cell according to the descending power ratio and a sequence of frequencies corresponding to the M respective RBs being high to low; or And determining, by the first base station, N RBs of reduced power from the M RBs of the first cell according to the power reduction ratio.

With reference to the first aspect, or the first implementation manner of the first aspect, or the second implementation manner of the first aspect, in the third implementation manner of the first aspect, the After determining, by the base station, N RBs of reduced power from the M RBs of the first cell, Includes:

Transmitting the frequency location information of the N RBs of the reduced power to the second base station, so that the second base station schedules the edge user on N RBs corresponding to the second cell The device transmits information.

In a second aspect, an embodiment of the present invention provides an apparatus for interference coordination, including:

An obtaining unit, configured to acquire a power reduction ratio of M resource blocks RBs for performing information transmission by the first cell, where M is a positive integer, the first cell is a cell managed by the first base station, and a determining unit is configured to: Determining, according to the power reduction ratio, N RBs of reduced power from the M RBs of the first cell, where N is a positive integer less than or equal to M;

a transmitting unit, configured to perform information transmission by using the N RBs that are processed by the first cell to reduce power, so that the second base station schedules edge user equipments on the N RBs corresponding to the second cell, and performs information transmission, where The second cell is a cell managed by the second base station, where the first cell and the second cell are adjacent to each other, and the N RBs corresponding to the second cell are the same as the first cell. The RBs of the reduced power N RB frequencies are consistent.

In a first implementation manner of the second aspect, the acquiring unit is further configured to acquire, according to the load information of the first cell, a power reduction ratio of the M RBs of the first cell; The proportion of the edge user equipment in the second cell is obtained, and the ratio of the power reduction of the M RBs in the first cell is obtained.

With reference to the second aspect, or the first implementation manner of the second aspect, in the second implementation manner of the second aspect, the determining unit is further configured to respectively correspond to the M RB according to the power reduction ratio Determining the N RBs of the reduced power from the M RBs of the first cell in an order of the frequency from low to high; or the frequency corresponding to the power reduction ratio and the M RBs respectively being high to low a sequence of determining, according to the power reduction ratio, N RBs of reduced power from the M RBs of the first cell; or randomly determining power reduction from the M RBs of the first cell according to the power reduction ratio N HB.

Combining the second aspect or the first implementation of the second aspect, or the second aspect of the second aspect In a third implementation manner of the second aspect, the device further includes: a sending unit;

The sending unit is configured to send the frequency position information of the N RBs of the reduced power to the second base station, so that the second base station schedules the N RBs corresponding to the second cell Edge user equipment and information transmission.

In a third aspect, an embodiment of the present invention provides a method for interference coordination, including:

The centralized controller obtains a ratio of power reduction of the M resource blocks RBs that are transmitted by the first cell, where M is a positive integer, the first cell is a cell managed by the first base station, and the first base station is the centralized a base station controlled by the controller;

Determining, according to the power reduction ratio, the N RBs of the power reduction from the M RBs in the first 'region, where N is a positive integer less than or equal to M;

The centralized controller instructs the first base station to perform information transmission by using the N RBs after the first cell power reduction processing, so that the second base station schedules edge user equipments on the N RBs corresponding to the second cell And performing information transmission, where the second cell is a cell managed by the second base station, the second base station is a base station controlled by the centralized controller, and the first cell and the second cell are mutually In the neighboring cell, the N RBs corresponding to the second cell are RBs that are consistent with the N RB frequency positions of the reduced power of the first cell.

In a first implementation manner of the third aspect, the centralized controller acquires, by the first cell, a power consumption ratio of the M resource blocks R B transmitted by the first cell, where:

The centralized controller acquires a power reduction ratio of the M RBs of the first cell according to the load information of the first cell; or

And the centralized controller acquires a power reduction ratio of the M RBs of the first cell according to a proportion of edge user equipments in the second cell.

With reference to the third aspect, or the first implementation manner of the third aspect, in the second implementation manner of the third aspect, the centralized controller, according to the power reduction ratio, is used by the centralized controller from the first cell The N RBs that determine the power reduction in the M RBs include: Determining, by the centralized controller, N RBs of reduced power from the M RBs of the first cell according to the power reduction ratio and the frequency corresponding to the M RBs respectively being low to high; or Determining, by the centralized controller, N RBs of reduced power from the M RBs of the first cell according to the descending power ratio and an order in which the frequencies corresponding to the M RBs are respectively high to low; or And according to the power reduction ratio, the centralized controller randomly determines N RBs of reduced power from the M RBs in the first 'area.

With reference to the third aspect, or the first implementation manner of the third aspect, or the second implementation manner of the third aspect, in a third implementation manner of the third aspect, After determining, by the controller, the N RBs of the reduced power from the M RBs in the first region, the method further includes:

The centralized controller sends the frequency location information of the N RBs of the reduced power to the second base station, so that the second base station schedules the edge user on N RBs corresponding to the second cell The device transmits information.

In a fourth aspect, an embodiment of the present invention provides an apparatus for interference coordination, including:

An acquiring unit, configured to obtain a power reduction ratio of M resource blocks RBs for performing information transmission by the first cell, where M is a positive integer, the first cell is a cell managed by the first base station, and the first base station is a Describe the base station controlled by the centralized controller;

a determining unit, configured to determine, according to the power reduction ratio, N RBs of reduced power from the M RBs of the first cell, where N is a positive integer less than or equal to M;

An indicating unit, configured to instruct the first base station to perform information transmission by using the N RBs after the first cell power reduction processing, so that the second base station schedules edge user equipments on the N RBs corresponding to the second cell And performing information transmission, where the second cell is a cell managed by the second base station, the second base station is a base station controlled by the centralized controller, and the first cell and the second cell are mutually In the neighboring cell, the N RBs corresponding to the second cell are RBs that are consistent with the N RB frequency positions of the reduced power of the first cell.

In a first implementation manner of the fourth aspect, the acquiring unit is further configured to be used according to the Obtaining, by the load information of a cell, the ratio of the power consumption of the M RBs of the first cell; or acquiring the M of the first cell according to the proportion of the edge user equipment in the second cell The ratio of power reduction of RB.

With reference to the fourth aspect, or the first implementation manner of the fourth aspect, in the second implementation manner of the fourth aspect, the determining unit is further configured to respectively correspond to the M RB according to the power reduction ratio Determining the N RBs of the reduced power from the M RBs of the first cell in an order of the frequency from low to high; or the frequency corresponding to the power reduction ratio and the M RBs respectively being high to low a sequence of determining, according to the power reduction ratio, N RBs of reduced power from the M RBs of the first cell; or randomly determining power reduction from the M RBs of the first cell according to the power reduction ratio N HB.

With reference to the fourth aspect, or the first implementation manner of the fourth aspect, or the second implementation manner of the fourth aspect, in the third implementation manner of the fourth aspect, the apparatus further includes: a sending unit.

In a fifth aspect, an embodiment of the present invention provides a base station, including: a processor, a transmitter, a receiver, and a modem;

The processor is configured to obtain a ratio of power reduction ratios of the M resource blocks RB that are used for information transmission by the first cell;

The processor is further configured to determine, according to the power reduction ratio, N RBs of reduced power from the M RBs of the first cell;

The processor is further configured to perform information transmission by using the N RBs that are processed by the first cell to reduce power, so that the second base station schedules edge user equipment and performs information on N RBs corresponding to the second cell. Transmission

The transmitter is configured to send frequency position information of the N RBs with reduced power to the a second base station, configured to enable the second base station to schedule an edge user equipment and perform information transmission on the N RBs corresponding to the second cell;

The receiver is configured to receive a data signal or a feedback signal;

The modem is configured to convert a control signal or a data signal that needs to be received by the receiver into a digitally modulated signal suitable for channel transmission.

In a sixth aspect, an embodiment of the present invention provides a centralized controller, including: a processor, a transmitter, a receiver, and a modem;

The processor is further configured to: instruct the first base station to perform information transmission by using the N RBs after the first cell power reduction processing, so that the second base station schedules edge users on the N RBs corresponding to the second cell Equipment and information transmission;

The transmitter is configured to send frequency position information of the N RBs of the reduced power to the second base station, so that the second base station schedules edge users on N RBs corresponding to the second cell Equipment and information transmission;

The receiver is configured to receive a data signal or a feedback signal;

The modem is configured to convert a control signal or a data signal that needs to be received by the receiving into a digitally modulated signal suitable for channel transmission.

The method and device for interference coordination provided by the embodiment of the present invention, first, the first base station acquires a power reduction ratio of M resource blocks RBs for information transmission by the first cell, and then, according to the power reduction ratio, the first base station obtains M from the first cell. Determining the N RBs of the power reduction in the RBs, and finally the first base station uses the N RBs after the power reduction of the first cell to perform information transmission, so that the second base station schedules the edge user equipment on the N RBs corresponding to the second cell. And information transmission. Dividing a frequency band into a plurality of frequency reuse sets in the prior art, and configuring different frequencies for edge user equipments of neighboring cells In the embodiment of the present invention, the first base station uses the N RBs that are processed by the first cell to perform information transmission, so that the second base station schedules the edge user equipment on the N RBs corresponding to the second cell. The information transmission can further reduce the ICI generated when adjacent cells multiplex the same frequency resources, and can reduce the implementation complexity of ICI control by ICIC technology. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings to be used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only the present invention. For some embodiments, other drawings may be obtained from those of ordinary skill in the art without departing from the drawings.

FIG. 1 is a flowchart of a method for interference coordination according to Embodiment 1 of the present invention;

2 is a flowchart of another method for interference coordination according to Embodiment 2 of the present invention; FIG. 3 is a schematic structural diagram of an apparatus for interference coordination according to Embodiment 3 of the present invention; Schematic diagram of a base station structure;

FIG. 5 is a schematic structural diagram of another apparatus for interference coordination according to Embodiment 4 of the present invention; FIG. 6 is a schematic structural diagram of a centralized controller according to Embodiment 4 of the present invention;

FIG. 7 is a schematic diagram of resource block arrangement according to an embodiment of the present invention;

FIG. 8 is a schematic diagram showing a correspondence relationship between resource blocks of a first cell and a second cell according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a user equipment priority list according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to make the advantages of the technical solution of the present invention more clear, the present invention will be described below with reference to the accompanying drawings and embodiments. Ming with a detailed description.

The method for the interference coordination provided by the embodiment of the present invention may be applied to a Long Term Evolution (LTE) network or an Enhanced Long Term Evolution (LTE-A, LTF~Advanced) network, where the base station involved in the embodiment of the present invention is used. Specifically, it may be an evolved base station (eNB, Evolved Node B) in an LTE or LTA network.

Embodiment 1

This embodiment provides a method for interference coordination. As shown in FIG. 1, the method includes:

101. The first base station acquires a ratio of power reduction of M resource blocks RBs for performing information transmission by the first cell.

The M is a positive integer, and the first cell is a cell managed by the first base station, that is, the first base station provides services for each user equipment in the first cell. In the embodiment of the present invention, the power reduction may be performed to reduce the power to be less than or equal to the preset power threshold, or to reduce to zero power. The preset power threshold may be configured according to an actual situation, which is not limited in the embodiment of the present invention.

For the embodiment of the present invention, the step 101 may be specifically: the first base station acquires a power reduction ratio of the M RBs of the first cell according to the load information of the first cell. The load information includes the number of user equipments and the number of bearers. The number of user equipments is the total number of user equipments in the cell, and the number of bearers is the total number of user equipments that the base station can carry. For example, the number of user equipments in the load information of the first cell is 300, and the number of bearers is 400, that is, 3/4 of the RBs in the first cell are used by the user equipment of the cell, so the power consumption of the M RBs of the first cell is reduced. The ratio is 1/4.

For the embodiment of the present invention, the step 101 may be specifically: the first base station acquires a power reduction ratio of the M RBs of the first cell according to the proportion of the edge user equipment in the second cell. For example, there are 600 user equipments in the second cell, wherein there are 200 edge user equipments interfered by the first base station, that is, the proportion of edge user equipments in the second cell is 1/3, so M of the first cell The ratio of power reduction of RB is 1/3.

In the embodiment of the present invention, the RB may be a Resource Block Group (RBG), and one RBG is generally composed of three RBs. At this time, step 101 may be that the first base station acquires the first 'J, The ratio of power reduction corresponding to the RBG for information transmission in the area.

102. The first base station determines N RBs of the power reduction rate from the M RBs of the first cell according to the power reduction ratio.

For the embodiment of the present invention, the step 102 may be specifically: determining, according to the power reduction ratio and the frequency corresponding to the M RBs, the first base station determining the power reduction N from the M RBs of the first, the _1, and the region. Or the first base station determines the N RBs of the reduced power from the M RBs of the first cell according to the power reduction ratio and the frequency corresponding to the M RBs respectively; or according to the power reduction ratio, A base station randomly determines N RBs of reduced power from M RBs of the first cell.

For example, in Figure 7, in the 10MHz bandwidth, M is 50, that is, 50 RBs in the first cell can be used for information transmission, and the ratio of power reduction obtained by the first base station is 1/3, that is, N is 17, 50 in the figure. The frequencies corresponding to the RBs are sequentially incremented by number. If the frequency corresponding to the 50 RBs is in the order of low to high, the first base station determines, from the 50 RBs of the first cell, 17 RBs of the reduced power are RBs 0 to 16; if 50 RBs are respectively The first base station determines the 17 RBs of the reduced power from the 50 RBs of the first cell to be the 34th to the 50th RBs; if the RBs of the reduced power are randomly determined, the The 17 RBs of the power reduction determined by a base station from the 50 RBs of the first cell may be No. 3, No. 7, No. 8, No. 10, No. 13, No. 14, No. 15, No. 18, No. 20, No. 26 , No. 28, No. 29, No. 31, No. 38, No. 40, No. 47 and No. 48 RB.

Further, the first base station may further send the frequency location information of the reduced power N RBs to the second base station, so that the second base station schedules the edge user equipment and performs information transmission on the N RBs corresponding to the second cell.

For example, the first base station may carry the frequency position information of the reduced power N RBs in a Relative Narrowband Transmit Power (MTP), and send the information to the second base station through the X2 interface, so that the second base station The edge user equipment is scheduled to perform information transmission according to the frequency location information of the N RBs carried in the received signaling RNTP. The X2 interface is used to implement interconnection between eNBs.

103. The first base station performs information transmission by using the N RBs after the power reduction of the first cell. Further, the second base station is configured to schedule edge user equipment and perform information transmission on the N RBs corresponding to the second cell.

The second cell is a cell managed by the second base station, and the first cell and the second cell are adjacent to each other, and the first cell may be an interfering cell, and the second cell may be an interfered cell, which is not implemented in the embodiment of the present invention. limited. The N RBs corresponding to the second cell are RBs that are consistent with the N RB frequency positions of the reduced power of the first cell. For example, as shown in FIG. 8 , the 6 RBs of the power reduction of the first cell are 0 to 5 Then, the six RBs corresponding to the second cell are numbers 0 to 5. For the embodiment of the present invention, the first cell and the second cell may be cells managed by the same base station, or may be cells managed by different base stations, which are not limited in the embodiment of the present invention.

In the embodiment of the present invention, the first base station performs information transmission on the N RBs after the power reduction of the first cell, and the second base station schedules the edge user equipment and performs information transmission on the N RBs corresponding to the second cell. . That is, the embodiment of the present invention improves the performance of information transmission on the part of the RB by the user equipment of the first cell, thereby improving the performance of the edge user equipment of the second cell for performing information transmission on the RBs, thereby implementing the information in the adjacent cells. The user equipment balances the performance of information transmission on the RB.

For the embodiment of the present invention, the determining, by the second base station, the N RBs corresponding to the second cell, and scheduling the edge user equipment on the N RBs corresponding to the second cell, and performing the information transmission may include: first acquiring each of the second cells a channel quality indication (CQI, Channel Quality Indication) value of the user equipment on the M RBs, and then determining, according to the CQI values, frequency positions of the N RBs that are processed by the first base station for power reduction, and finally at the same frequency of the second cell. An edge user equipment is scheduled on the N RBs of the location and information is transmitted. The channel quality indicator CQI is a measurement standard of the communication quality of the user equipment on a certain RB.

The second base station determines, according to the CQI values, the frequency positions of the N RBs that are processed by the first base station, and may be implemented by using a Frequency Selective Schedule (FSS) algorithm. Specifically, the second base station first establishes a corresponding user equipment priority list according to the CQI value of the M RBs, and then the second base station acquires the corresponding N RBs, where the corresponding The N RBs with the highest priority are the N RBs corresponding to the user equipment priority list of the edge user equipment. The greater the CQ I value reported by the user equipment, the higher the priority of the user equipment in the user equipment priority list corresponding to the RB. Conversely, the smaller the CQ I value reported by the user equipment, the user equipment priority list corresponding to the RB. The lower the user equipment priority.

For example, in FIG. 9, among the 50 RBs of the first cell, the RBs 0 to 5 are the 6 RBs of the power reduction determined by the first base station. For the user equipment priority list corresponding to the RB 4, the user equipment with the highest priority is the edge user equipment. For the user equipment priority list corresponding to the RB 9th, the user equipment with the highest priority is the central user equipment. Each of the base stations divides the corresponding cell into two internal and external layers according to the wireless link. The user equipment in the inner layer is the central user equipment, and the user equipment in the outer layer is the edge user equipment. For the user equipment priority list corresponding to the RB No. 4, the user equipment with the highest priority is the edge user equipment, so that the RB No. 4 is the RB of the power reduction determined by the first base station; For the list, since the user equipment with the highest priority is the central user equipment, it is determined that the RB 9 is not the RB of the power reduction determined by the first base station.

The method for interference coordination provided by the embodiment of the present invention can also be applied in the time domain to solve the inter-cell interference problem generated when neighboring cells use the same time domain resource. Specifically, the performance of the information transmission of the user equipment of the first cell on the part of the time domain resource is moderately reduced, thereby improving the '± energy of the edge user equipment of the second cell to perform information transmission on the part of the time domain resource, thereby implementing The user equipment in each cell balances the performance of data transmission on the same time domain resource.

Embodiment 2

This embodiment provides a method for interference coordination. As shown in FIG. 2, the method includes:

201. The centralized controller acquires a power reduction ratio of the M resource block RBs that are used for information transmission by the first cell.

The M is a positive integer, the first cell is a cell managed by the first base station, and the first base station is a base station controlled by the centralized controller. In the embodiment of the present invention, the power reduction may be specifically The power is reduced to be less than or equal to the preset power threshold, or is reduced to zero power. The preset power threshold may be configured according to an actual situation, which is not limited by the embodiment of the present invention. For the embodiment of the present invention, the step 201 may be: the centralized controller acquires the power reduction ratio of the M RBs of the first cell according to the load information of the first cell. The load information includes the number of user equipments and the number of bearers. The number of user equipments is the total number of user equipments in the cell, and the number of bearers is the total number of user equipments that the base station can carry. For example, the number of user equipments in the load information of the first cell is 400, and the number of bearers is 1000, that is, 2/5 of the RBs in the first 'area are used by the user equipments of the cell, so the M RBs of the first cell are lowered. The power ratio is 3/5.

For the embodiment of the present invention, the step 201 may be specifically: the centralized controller acquires the power reduction ratio of the M RBs of the first cell according to the proportion of the edge user equipment in the second cell. For example, there are 400 user equipments in the second cell, wherein there are 100 edge user equipments interfered by the first base station, that is, the proportion of edge user equipments in the second cell is 1 / 4, so M of the first cell The ratio of power reduction of RB is 1/4.

In the embodiment of the present invention, the RB may be an RBG, and the RBG is generally composed of three RBs. At this time, the step 201 may be that the centralized controller acquires a power reduction ratio corresponding to the RBG for performing information transmission by the first cell.

202. According to the power reduction ratio, the centralized controller determines N RBs of reduced power from the M RBs of the first cell.

Where N is a positive integer less than or equal to M.

For the embodiment of the present invention, the step 202 may be specifically: determining, according to the power reduction ratio and the frequency corresponding to the M RBs, the centralized controller determines the N RBs of the reduced power from the M RBs of the first cell; Or according to the power reduction ratio and the frequency corresponding to the M RBs, the centralized controller determines the N RBs of the reduced power from the M RBs of the first cell; or according to the power reduction ratio, the centralized controller N RBs of reduced power are randomly determined among the M RBs of the first cell.

Further, the centralized controller may further send the frequency position information of the reduced power N RBs to the second base station, so that the second base station schedules the edge user setting on the N RBs corresponding to the second cell. Prepare and transfer information.

For example, the centralized controller may carry the frequency position information of the N RBs of the reduced power in the signaling RNTP, and send the information to the second base station through the X 2 interface, so that the second base station carries the RNTP according to the received signaling. The frequency location information of the N RBs, and the edge user equipment is scheduled to perform information transmission.

2 0 3. The centralized controller instructs the first base station to perform information transmission by using the N RBs after the first cell power reduction processing.

Further, the second base station is configured to schedule edge user equipment and perform information transmission on the N RBs corresponding to the second cell.

The second cell is a cell managed by the second base station, and the second base station is a base station controlled by the centralized controller. The first cell and the second cell are mutually adjacent to each other, and the first cell may be an interfering cell, and the second cell may be an interfering cell, which is not limited in the embodiment of the present invention. The N RBs corresponding to the second cell are RBs that match the N RB frequency positions of the reduced power of the first cell. For the embodiment of the present invention, the first cell and the second cell may be cells managed by the same base station, or may be cells managed by different base stations, which are not limited in the embodiment of the present invention.

In the embodiment of the present invention, the centralized controller instructs the first base station to perform information transmission on the N RBs after the power consumption of the first cell, so that the second base station schedules the edge user equipment on the N RBs corresponding to the second cell. Transfer information. That is, the embodiment of the present invention improves the performance of information transmission on the part of the RB by the user equipment of the first cell, thereby improving the performance of the edge user equipment of the second cell for performing information transmission on the RBs, thereby implementing the information in the adjacent cells. The user equipment balances the performance of information transmission on the RB.

The method for interference coordination provided by the embodiment of the present invention can also be applied in the time domain to solve the interference problem generated when neighboring cells use the same time domain resource. Specifically, the performance of the information transmission of the user equipment of the first cell on the part of the time domain resource is moderately reduced by the centralized controller, thereby improving the performance of the edge user equipment of the second cell for performing information transmission on the part of the time domain resource, and further Realizing user equipment in each cell managed by the base station controlled by the centralized controller, Performance balance of data transfer on the same time domain resource.

Embodiment 3

Further, as a specific implementation of the method shown in FIG. 1, the embodiment of the present invention provides a device for interference coordination. As shown in FIG. 3, the entity of the device may be a base station, where the device includes: an acquiring unit 31, The unit 32 and the transmission unit 33 are determined.

The obtaining unit 31 is configured to obtain a power reduction ratio of the M resource blocks RB for performing information transmission by the first cell.

Wherein, M is a positive integer, and the first cell is a cell managed by the first base station.

The determining unit 32 is configured to determine N RBs of reduced power from the M RBs of the first 'area according to the ratio of the reduced power acquired by the obtaining unit 31.

Where N is a positive integer less than or equal to M.

The transmitting unit 33 is configured to perform information transmission by using the N RBs after the first cell power reduction process determined by the determining unit 32, so that the second base station schedules the edge user equipment and performs information transmission on the N RBs corresponding to the second cell. .

The second cell is a cell managed by the second base station, where the first cell and the second cell are adjacent to each other, and the N RBs corresponding to the second cell are HBs that are consistent with the N RB frequency positions of the reduced power of the first cell. .

The obtaining unit 31 is further configured to acquire, according to the load information of the first cell, a ratio of power reduction of the M RBs of the first cell, or acquire M RBs of the first cell according to the proportion of the edge user equipment in the second cell. The ratio of power reduction.

The determining unit 32 is further configured to determine, according to the power reduction ratio and the frequency corresponding to the M RBs, the N RBs of the reduced power from the M RBs of the first cell; or according to the power reduction ratio and the M Determining the frequency of the RBs from high to low, determining N RBs of reduced power from the M RBs of the first cell; or randomly determining the power reduction from the M RBs of the first cell according to the ratio of power reduction N RBs.

Optionally, the device may further include: a sending unit 34. The sending unit 34 is configured to send the frequency location information of the N RBs of the reduced power determined by the determining unit 32 to the second base station, so that the second base station schedules the edge user equipment and performs information on the N RBs corresponding to the second cell. transmission.

Further, the entity of the apparatus for interference coordination may be a base station. As shown in FIG. 4, the base station may include: a processor 4 1 , a transmitter 42 , a receiver 4 3 , a modem 44 , and a receiver 43 . The modems 44 are connected.

The processor 4 1 is configured to obtain a power reduction ratio of the M resource blocks RBs for performing information transmission by the first cell.

The processor 4 1 is further configured to determine, according to the power reduction ratio, N RBs of the power reduction rate from the M RBs of the first '_1, the area.

Where N is a positive integer less than or equal to M.

The processor 4 is further configured to perform information transmission by using the N RBs after the power reduction of the first cell, so that the second base station schedules the edge user equipment and performs information transmission on the N RBs corresponding to the second cell.

The processor 4 1 is further configured to obtain, according to the load information of the first cell, a power reduction ratio of the M RBs of the first cell.

The processor 4 1 is further configured to obtain a power reduction ratio of the M RBs of the first cell according to a proportion of edge user equipments in the second cell.

The processor 4 1 is further configured to determine, according to the power reduction ratio and the frequency corresponding to the M RBs, the N RBs of the reduced power from the M RBs of the first cell.

The processor 4 1 is further configured to determine N RBs of reduced power from the M RBs of the first cell according to a descending power ratio and a frequency corresponding to the M RBs respectively. The processor 41 is further configured to randomly determine N RBs of reduced power from the M RBs of the first '_1, the area according to the power reduction ratio.

The transmitter 42 is configured to send the frequency location information of the N RBs of the reduced power to the second base station, so that the second base station schedules the edge user equipment and performs information transmission on the N RBs corresponding to the second cell.

The receiver 43 is configured to receive a data signal or a feedback signal.

A modem 44 is operative to convert a control signal or data signal that needs to be received by the receiver 43 into a digitally modulated signal suitable for channel transmission.

It should be noted that other corresponding descriptions of the functional units in the apparatus for the interference coordination provided in the embodiment of the present invention may be referred to the corresponding description in FIG. 1 , and details are not described herein again.

The method and device for interference coordination provided by the embodiment of the present invention, first, the first base station acquires a power reduction ratio of M resource blocks RBs for information transmission by the first cell, and then, according to the power reduction ratio, the first base station obtains M from the first cell. Determining the N RBs of the power reduction in the RBs, and finally the first base station uses the N RBs after the power reduction of the first cell to perform information transmission, so that the second base station schedules the edge user equipment on the N RBs corresponding to the second cell. And information transmission. Compared with the prior art, the frequency band is divided into several frequency reuse sets, and the edge user equipment of the neighboring cell is configured with different frequency reuse sets. The next N RBs perform information transmission, so that the second base station schedules edge user equipments on the N RBs corresponding to the second cell and performs information transmission, thereby reducing IC I generated when adjacent cells multiplex the same frequency resources. At the same time, the implementation complexity of IC I control through ICIC technology can be reduced.

Embodiment 4

Further, as a specific implementation of the method shown in FIG. 2, the embodiment of the present invention provides a device for interference coordination. As shown in FIG. 5, the entity of the device may be a base station, where the device includes: an acquiring unit 51, The determining unit 52 and the indicating unit 53 are provided.

The obtaining unit 51 is configured to obtain a power reduction ratio of the M resource blocks RB for performing information transmission by the first cell. Wherein, M is a positive integer, the first cell is a cell managed by the first base station, and the first base station is a base station controlled by the centralized controller.

The determining unit 52 is configured to determine N RBs of reduced power from the M RBs of the first 'area according to the ratio of the reduced power acquired by the obtaining unit 51.

Where N is a positive integer less than or equal to M.

The indicating unit 53 is configured to instruct the first base station to perform information transmission by using the N RBs after the first cell power reduction process determined by the determining unit 52, so that the second base station schedules the edge user equipment on the N RBs corresponding to the second cell. And information transmission.

The second cell is a cell managed by the second base station, and the second base station is a base station controlled by the centralized controller, where the first cell and the second cell are adjacent to each other, and the N RBs corresponding to the second cell are the same as the first cell. N RBs with the same RB frequency position with reduced power.

The obtaining unit 51 is further configured to acquire, according to the load information of the first cell, a ratio of power reduction of the M RBs of the first cell, or according to a proportion of edge user equipments in the second cell, Obtaining a power reduction ratio of the M RBs of the first cell.

The determining unit 52 is further configured to determine the N RBs of the reduced power from the M RBs of the first cell according to the power reduction ratio and the frequency corresponding to the M RBs respectively being low to high. Or determining N RBs of reduced power from the M RBs of the first cell according to the descending power ratio and a frequency corresponding to the M RBs respectively from high to low; or according to the And reducing a power ratio, and randomly determining N RBs of reduced power from the M RBs of the first cell.

Optionally, the device may further include: a sending unit 54.

The sending unit 54 is configured to send the frequency location information of the N RBs of the reduced power determined by the determining unit 52 to the second base station, so that the second base station schedules the edge user equipment and performs information on the N RBs corresponding to the second cell. transmission.

Further, the entity of the apparatus for interference coordination may be a base station. As shown in FIG. 6, the base station may include: a processor 61, a transmitter 62, a receiver 63, a modem 64, and a receiver 63 and a modem 64. connection. The processor 6 1 is configured to obtain a power reduction ratio of the resource block RB of the first cell for information transmission.

Where Μ is a positive integer, and the first cell is a cell managed by the first base station.

The processor 6 1 is further configured to determine, according to the power reduction ratio, the RBs of the power reduction rate from the first _1 and the RBs of the area.

Where N is a positive integer less than or equal to M.

The processor 6 1 is further configured to: instruct the first base station to perform information transmission by using the N RBs that are processed by the first cell, to enable the second base station to schedule the edge user equipment and perform information on the N RBs corresponding to the second cell. transmission.

The processor 6 1 is further configured to acquire, according to the load information of the first cell, a power reduction ratio of the M RBs of the first cell.

The processor 6 1 is further configured to obtain, according to a proportion of the edge user equipment in the second cell, a power reduction ratio of the M RBs of the first cell.

The processor 6 1 is further configured to determine, according to the power reduction ratio and the frequency corresponding to the M RBs, the N RBs of the reduced power from the M RBs of the first cell.

The processor 6 1 is further configured to determine, according to the power reduction ratio and the frequency corresponding to the M RBs, the N RBs of the reduced power from the N RBs of the first cell.

The processor 6 1 is further configured to randomly determine the N RBs of the reduced power from the M RBs of the first '_1, the area according to the power reduction ratio.

The transmitter 62 is configured to send the frequency location information of the N RBs of the reduced power to the second base station, so that the second base station schedules the edge user equipment and performs information transmission on the N RBs corresponding to the second cell.

The receiver 6 3 is configured to receive a data signal or a feedback signal. A modem 64 is operative to convert a control signal or data signal that needs to be received by the receiver 63 into a digitally modulated signal suitable for channel transmission.

It should be noted that other corresponding descriptions of the functional units in the apparatus for the interference coordination provided in the embodiment of the present invention may be referred to the corresponding description in FIG. 2, and details are not described herein again.

The method and device for interference coordination provided by the embodiment of the present invention, first, the first base station acquires a power reduction ratio of M resource blocks RBs for information transmission by the first cell, and then, according to the power reduction ratio, the first base station obtains M from the first cell. Determining the N RBs of the power reduction in the RBs, and finally the first base station uses the N RBs after the power reduction of the first cell to perform information transmission, so that the second base station schedules the edge user equipment on the N RBs corresponding to the second cell. And information transmission. Compared with the prior art, the frequency band is divided into several frequency reuse sets, and the edge user equipment of the neighboring cell is configured with different frequency reuse sets. The next N RBs perform information transmission, so that the second base station schedules edge user equipments on the N RBs corresponding to the second cell and performs information transmission, thereby reducing IC I generated when adjacent cells multiplex the same frequency resources. At the same time, the implementation complexity of IC I control through ICIC technology can be reduced. The apparatus for the interference coordination provided by the embodiment of the present invention may implement the foregoing method embodiments. For the specific function implementation, refer to the description in the method embodiment, and details are not described herein again. The method and apparatus for interference coordination provided by the embodiments of the present invention may be applicable to reducing interference generated by intra-frequency multiplexing between adjacent cells, but is not limited thereto.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. In execution, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art may be within the technical scope disclosed by the present invention. Changes or substitutions that are easily conceived are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

claims

1. A method of interference coordination, characterized by: including:

The first base station obtains the power reduction ratio of M resource blocks RB used by the first cell for information transmission, where M is a positive integer, and the first cell is a cell managed by the first base station;

According to the power reduction ratio, the first base station determines N RBs for power reduction from the M RBs in the first zone, where N is a positive integer less than or equal to M;

The first base station uses the N RBs after power reduction processing of the first cell for information transmission, so that the second base station schedules edge user equipment on the N RBs corresponding to the second cell and performs information transmission, where , the second cell is a cell managed by the second base station, the first cell and the second cell are adjacent cells to each other, and the N RBs corresponding to the second cell are the same as those of the first ' j , the N RBs with the same frequency position of the power-reduced RBs in the area.

2. The interference coordination method according to claim 1, wherein the first base station obtains the power reduction ratio of the M resource blocks RB used by the first cell for information transmission including:

The first base station obtains the power reduction ratio of the M RBs of the first cell according to the load information of the first cell; or

The first base station obtains the power reduction ratio of the M RBs of the first cell according to the proportion of edge user equipment in the second cell.

3. The interference coordination method according to claim 1, characterized in that, according to the power reduction ratio, the first base station determines the reduction power from the M RBs in the first zone. The N RBs of power include:

According to the power reduction ratio and the order of frequencies corresponding to the M RBs from low to high, the first base station determines the N RBs for power reduction from the M RBs in the first 'j' area. RB; or

According to the power reduction ratio and the order of frequencies corresponding to the M RBs from high to low, the first base station determines the N RBs for power reduction from the M RBs in the first 'j' area. RB; or

According to the power reduction ratio, the first base station randomly determines N RBs to reduce power from the M RBs in the first zone.

4. The interference coordination method according to claim 1, characterized in that, according to the power reduction ratio, the first base station determines the reduction power from the M RBs in the first zone. After the N RBs of power, it also includes:

The first base station sends the frequency location information of the reduced-power N RBs to the second base station, so that the second base station schedules the edge user on the N RBs corresponding to the second cell. equipment and transmit information.

5. A method of interference coordination, characterized by including:

The centralized controller obtains the power reduction ratio of the M resource blocks RB used by the first cell for information transmission, where M is a positive integer, the first cell is a cell managed by the first base station, and the first base station is the centralized Base station controlled by the controller;

According to the power reduction ratio, the centralized controller determines N RBs for power reduction from the M RBs of the first cell, where N is a positive integer less than or equal to M;

The centralized controller instructs the first base station to use the N RBs after the power reduction process of the first cell for information transmission, so that the second base station schedules edge user equipment on the N RBs corresponding to the second cell. and perform information transmission, wherein the second cell is a cell managed by the second base station, the second base station is a base station controlled by the centralized controller, and the first cell and the second cell are mutually exclusive. In the neighboring cell, the N RBs corresponding to the second cell are RBs whose frequency positions are consistent with the N RBs of the first cell whose power is reduced.

6. The interference coordination method according to claim 5, wherein the centralized controller obtains the power reduction ratio of the M resource blocks RB used by the first cell for information transmission including:

The centralized controller obtains the power reduction ratio of the M RBs of the -th cell based on the load information of the -th cell; or

The centralized controller obtains the power reduction ratio of the M RBs in the first area according to the proportion of edge user equipment in the second cell.

7. The interference coordination method according to claim 5, characterized in that, according to the power reduction ratio, the centralized controller determines the power reduction from the M RBs in the first zone. power The N RBs include:

According to the power reduction ratio and the order of frequencies corresponding to the M RBs from low to high, the centralized controller determines the N RBs for power reduction from the M RBs in the first' zone; Or according to the power reduction ratio and the order from high to low of the frequencies corresponding to the M RBs, the centralized controller determines the N RBs for power reduction from the M RBs in the first zone. ; Or according to the power reduction ratio, the centralized controller randomly determines N RBs to reduce power from the M RBs of the first cell.

8. The interference coordination method according to claim 5, characterized in that, according to the power reduction ratio, the centralized controller determines the power reduction from the M RBs in the first zone. After the N RBs of power, it also includes:

The centralized controller sends the frequency location information of the reduced-power N RBs to the second base station, so that the second base station schedules the edge user on the N RBs corresponding to the second cell. equipment and transmit information.

9. A device that interferes with coordination, characterized by: including:

The acquisition unit is used to obtain the power reduction ratio of the M resource blocks RB used for information transmission in the first cell, where M is a positive integer, and the first cell is a cell managed by the first base station; Determine N RBs for power reduction among M RBs, where N is a positive integer less than or equal to M;

A transmission unit configured to use the N RBs of the first cell after power reduction processing determined by the determination unit to perform information transmission, so that the second base station schedules edge user equipment on the N RBs corresponding to the second cell. and perform information transmission, wherein the second cell is a cell managed by the second base station, the first zone and the second cell are adjacent cells to each other, and the N RBs corresponding to the second cell are RBs whose frequency positions are consistent with the N RBs of reduced power in the first 'j' zone.

10. The interference coordination device according to claim 9, characterized in that,

The obtaining unit is also configured to obtain the first cell according to the load information of the first cell. The power reduction ratio of the M RBs of the cell; or the power reduction ratio of the M RBs of the first cell is obtained according to the proportion of edge user equipment in the second cell.

11. The interference coordination device according to claim 9, characterized in that,

The determining unit is further configured to determine the N RBs for power reduction from the M RBs of the first cell according to the power reduction ratio and the order of frequencies corresponding to the M RBs from low to high. RB; or determine the N RBs for power reduction from the M RBs in the first zone according to the power reduction ratio and the order from high to low of the frequencies corresponding to the M RBs; or according to The power reduction ratio is to randomly determine N RBs for power reduction from the M RBs of the first cell.

12. The interference coordination device according to claim 9, characterized in that the device further includes: sending information to the second base station, so that the second base station corresponds to the N corresponding to the second cell. The edge user equipment is scheduled on each RB and information is transmitted.

1 3. A device for interfering with coordination, characterized in that it includes:

The acquisition unit is used to obtain the power reduction ratio of the M resource blocks RB used for information transmission in the first cell, where M is a positive integer, the first cell is a cell managed by the first base station, and the first base station is the The base station controlled by the centralized controller; N RBs for power reduction are determined among the M RBs of a cell, where N is a positive integer less than or equal to M;

Instruction unit, configured to instruct the first base station determined by the determination unit to use the N RBs after the power reduction process of the first cell for information transmission, so that the second base station corresponding to the N RBs of the second cell Edge user equipment is scheduled on the RB and information is transmitted, where the second cell is a cell managed by the second base station, the second base station is a base station controlled by the centralized controller, and the first zone is The second cells are adjacent cells to each other, and the N RBs corresponding to the second cell are RBs whose frequency positions are consistent with the N RBs of the first cell that reduce power.

14. The interference coordination device according to claim 13, characterized in that the obtaining unit is further configured to obtain the M RBs of the first cell according to the load information of the first cell. the power reduction ratio; or obtain the power reduction ratio of the M RBs of the first cell according to the proportion of edge user equipment in the second cell.

15. The interference coordination device according to claim 13, characterized in that,

16. The interference coordination device according to claim 13, characterized in that the device further includes: sending information to the second base station, so that the second base station corresponds to the second cell. The edge user equipment is scheduled on N RBs and information is transmitted.

17. A base station, characterized in that it includes: a processor, a transmitter, a receiver, and a modem;

The processor is used to obtain the power reduction ratio of the M resource blocks RB used for information transmission in the first cell;

The processor is further configured to determine N RBs for power reduction from the M RBs in the first zone according to the power reduction ratio;

The processor is also configured to use the N RBs after power reduction processing in the first cell for information transmission, so that the second base station schedules edge user equipment on the N RBs corresponding to the second cell and performs information transmission. transmission; transmission

The transmitter is configured to send the frequency location information of the N RBs with reduced power to the second base station, so that the second base station schedules edge users on the N RBs corresponding to the second cell. equipment and transmit information;

The receiver is used to receive data signals or feedback signals;

The modem is used to convert the control signal or data signal that needs to be received by the receiver into a digital modulated signal suitable for channel transmission.

18. A centralized controller, characterized by including: a processor, a transmitter, a receiver, and a modem;

The processor is also configured to instruct the first base station to use the N RBs after the power reduction process of the first cell for information transmission, so that the second base station schedules edge users on the N RBs corresponding to the second cell. equipment and transmit information;

The receiver is used to receive data signals or feedback signals;

The modem is used to convert the control signal or data signal that needs to be received through the receiver into a digital modulated signal suitable for channel transmission.