WO2015100539A1

WO2015100539A1 - Method, device and system for downlink interference coordination

Info

Publication number: WO2015100539A1
Application number: PCT/CN2013/090893
Authority: WO
Inventors: 李小捷; 辛嘉鹏; 吴利华; 李琦
Original assignee: 华为技术有限公司
Priority date: 2013-12-30
Filing date: 2013-12-30
Publication date: 2015-07-09
Also published as: CN105009636B; CN105009636A

Abstract

Disclosed in the present invention are a method, device and system for downlink interference coordination. The method comprises: a base station determines that the actual transmission power of a first cell is less than or equal to a preset maximum transmission power; the base station determines at least one user equipment (UE) and a cell where the at least one UE is located, and the at least one UE is the UE interfered when the first cell transmits signals using the preset maximum transmission power; the base station modifies the property of the at least one UE to Coordinated Multi-Point (COMP) user, and adds the first cell to the COMP cooperation set of the UE; the base station determines a number and selects a COMP cooperation mode for the UE according to the number, and the number is the total number of cells where the at least one UE is located.

Description

Downlink interference coordination method, device and system

The present invention relates to the field of communications technologies, and in particular, to a downlink interference coordination method, apparatus, and system. Background technique

Currently, interference solutions in the Long Term Evolution Advanced (LTE-A) system include a variety of, for example, Coordinated Multi-point (COMP) technology, the goal of which is to target other cells to target users. The interference is circumvented or converted into a signal useful to the target user, and the base station cooperative transmission improves the throughput, especially the cell edge throughput, thereby improving the cell edge coverage and improving the edge user experience.

Among them, collaborative user and cooperative set selection is one of the key technologies of COMP, and there are various implementation methods thereof, for example: determining the reference signal received power of the serving cell and the neighboring cell of the serving cell measured by the UE (Reference Signal Received Power, The user whose RSRP difference is less than a certain threshold determines the user as a collaborative user, and joins the neighboring cell related to the calculation when determining the collaborative user to the collaborative set of the collaborative user. For example, the cooperative set is selected according to the change of the user's coordinated cell after the join signal to interference ratio (Geometry). After the cooperation, the coordinated cell except the cell turns the interference signal into a useful signal, and the Geometry will be greatly raised. When the Geometry elevation before and after collaboration is greater than a certain threshold, the collaborative cell is the collaboration set of the user, and the corresponding user is the collaborative user.

Key technologies of COMP include: Joint Processing (JP) and Cooperative Scheduling and Cooperative Beam (CS/CB). Among them, Joint Processing (JP) can be divided into: Joint transmission

(Jinda Transmission, JT), that is, multiple COMP nodes transmit data at the same time; and, Dynamic Point Selection (DPS), which dynamically selects one transmission data from multiple COMP nodes. Dynamic Coordinated Scheduling (DCS) and Cooperative Beam

(Coordinated Beamforming, CBF), the COMP master node can obtain the data to be transmitted, and the COMP cooperation node obtains the scheduling and beamforming decision information of the UE at the master node, and does not use or Select a policy for sending users with less orthogonality to the serving cell.

In the existing COMP solution, only the factors that benefit the collaborative users are considered when determining the collaboration set and determining the collaboration mode, so the performance of the entire network cannot be effectively improved. Summary of the invention

The embodiments of the present invention provide a downlink interference coordination method, device, and system, which are used to improve the throughput performance of the COMP technology and improve the performance of the entire network when the cooperative set selection and the cooperative mode are selected in the COMP interference coordination algorithm.

A first aspect, the downlink interference coordination method provided by the embodiment of the present invention includes: determining, by the base station, that an actual transmit power of the first cell is less than or equal to a preset maximum transmit power; the base station determining at least one user equipment UE and the a cell in which at least one UE is located, and the at least one UE is a UE that interferes when the first cell uses a preset maximum transmit power to transmit a signal;

The base station modifies the attribute of the at least one UE to a coordinated multi-point COMP user, and adds the first 'zone to the COMP collaboration set of the UE;

The base station determines the number, and selects a COMP cooperation mode for the UE according to the quantity, where the quantity is the total number of cells in which the at least one UE is located.

With reference to the first aspect, in a first possible implementation manner, before the determining, by the base station, that the actual transmit power of the first cell is less than or equal to the preset maximum transmit power, the method further includes: determining, by the base station, the first cell Actual transmit power.

With reference to the first aspect, or in combination with the first possible implementation of the first aspect, in a second possible implementation manner, the base station determines the at least one UE by:

Determining, by the base station, a first signal to noise ratio and a second signal to noise ratio; wherein, the first signal to noise ratio is: when the first cell uses a preset maximum transmit power to transmit a signal, the first UE detects The first signal-to-noise ratio is: the second signal-to-noise ratio detected by the first UE when the first cell transmits a signal by using the actual transmit power; The serving cell of the UE is a second cell, and the second cell is a neighboring cell of the first cell; When the difference between the first signal to noise ratio and the second signal to noise ratio is greater than a preset first threshold, the base station determines that the first UE uses a preset maximum transmission for the first cell The UE that transmits 4 when the power is transmitted.

With reference to the first aspect, in a third possible implementation manner, after the base station determines the at least one UE, the base station determines a total number of cells in which the at least one UE is located.

In combination with the first aspect, or in combination with the first possible implementation of the first aspect, or in combination with the second possible implementation of the first aspect, or in combination with the third possible implementation of the first aspect, in the fourth In a possible implementation manner, the base station selects a COMP collaboration mode for the UE according to the quantity, including:

If the number is greater than the preset second threshold, the COMP cooperation mode selected by the base station for the UE is a dynamic cooperative scheduling DCS mode.

In combination with the first aspect, or in combination with the first possible implementation of the first aspect, or in combination with the second possible implementation of the first aspect, or in combination with the third possible implementation of the first aspect, in the fifth In a possible implementation manner, the base station selects a COMP collaboration mode for the UE according to the quantity, including:

If the number is less than or equal to the preset second threshold, the base station selects a COMP cooperation mode for the UE as follows: joint transmission JT cooperation mode, dynamic cooperative scheduling DCS cooperation mode, and cooperative beam CBF cooperation mode. .

With reference to the fifth possible implementation manner of the foregoing aspect, in a sixth possible implementation, if the quantity is less than or equal to the second threshold, the base station selects the UE according to the load of the first cell COMP collaboration.

With reference to the sixth possible implementation manner of the foregoing aspect, in a seventh possible implementation manner, the determining, by the base station, the COMP collaboration mode for the UE according to the load of the first cell, When the load of the cell is greater than the preset third threshold, the COMP cooperation mode selected by the base station for the UE is a CBF collaboration mode.

With reference to the sixth possible implementation manner of the foregoing aspect, in an eighth possible implementation manner, the performing, by the base station, the COMP collaboration mode for the UE, according to the load of the first cell, includes: When the load of the first cell is less than or equal to a preset third threshold, the base station is the

The UE selects the COMP collaboration mode as one of the following: JT collaboration mode and DCS collaboration mode.

With reference to the eighth possible implementation manner of the foregoing aspect, in a ninth possible implementation manner, when the load of the first cell is less than or equal to a preset third threshold, the base station is configured according to the UE The signal to interference and noise ratio of the SRS signal received by the first cell is selected by the UE to select a COMP cooperation mode.

With reference to the ninth possible implementation manner of the first aspect, in a tenth possible implementation manner, the base station selects, according to a signal to interference and noise ratio of the SRS signal received by the UE in the first cell to be the UE COMP collaboration methods, including:

When the signal to interference and noise ratio of the SRS signal of the UE is greater than a preset fourth threshold, the COMP cooperation mode selected by the base station for the UE is a JT collaboration mode.

With reference to the ninth possible implementation manner of the first aspect, in an eleventh possible implementation manner, the base station is configured as the UE according to a signal to interference and noise ratio of the SRS signal received by the UE in the first cell Choose COMP collaboration methods, including:

When the signal to interference and noise ratio of the SRS signal of the UE is less than or equal to a preset fourth threshold, the COMP cooperation mode selected by the base station for the UE is a DCS cooperation mode.

A second aspect, the downlink interference coordination apparatus provided by the embodiment of the present invention includes: a first unit, configured to determine that an actual transmit power of the first cell is less than or equal to a preset maximum transmit power;

a second unit, configured to determine at least one user equipment UE and a cell where the at least one UE is located, where the at least one UE is a UE that interferes when the first cell uses a preset maximum transmit power to transmit a signal;

a third unit, configured to modify an attribute of the at least one UE to a coordinated multi-point COMP user, and join the first cell to a COMP collaboration set of the UE;

And a fourth unit, configured to determine a quantity, and select a COMP cooperation mode for the UE according to the quantity, where the quantity is a total number of cells in which the at least one UE is located.

With reference to the second aspect, in a first possible implementation manner, the first unit is further configured to: determine, before determining that an actual transmit power of the first cell is less than or equal to a preset maximum transmit power The actual transmit power of the first cell.

With reference to the second aspect, or in combination with the first possible implementation of the second aspect, in a second possible implementation, the second unit determines the at least one UE by:

Determining a first signal to noise ratio and a second signal to noise ratio; wherein, the first signal to noise ratio is: when the first cell uses a preset maximum transmit power to transmit a signal, the first UE detects the first a signal-to-noise ratio; the second signal-to-noise ratio is: a second signal-to-noise ratio detected by the first UE when the first cell transmits a signal by using an actual transmit power; The cell is a second cell, and the second cell is a neighboring cell of the first cell;

When the difference between the first signal to noise ratio and the second signal to noise ratio is greater than a preset first threshold, determining that the first UE uses a preset maximum transmit power transmission signal for the first cell Interfering with the UE.

With reference to the second aspect, in a third possible implementation, the second unit is further configured to: after determining the at least one UE, determine a total number of cells in which the at least one UE is located.

In combination with the second aspect, or in combination with the first possible implementation of the second aspect, or with the second possible implementation of the second aspect, or with the third possible implementation of the second aspect, in a fourth possible In an implementation manner, the fourth unit is specifically configured to:

If the number is greater than the preset second threshold, the COMP collaboration mode selected for the UE is a dynamic cooperative scheduling DCS mode.

In combination with the second aspect, or in combination with the first possible implementation of the second aspect, or with the second possible implementation of the second aspect, or with the third possible implementation of the second aspect, in a fifth possible In an implementation manner, the fourth unit is specifically configured to:

If the number is less than or equal to the preset second threshold, the COMP cooperation mode selected by the UE is any one of the following: joint transmission JT cooperation mode, dynamic cooperative scheduling DCS cooperation mode, and cooperative beam CBF cooperation mode.

With reference to the fifth possible implementation manner of the second aspect, in a sixth possible implementation, if the quantity is less than or equal to a preset second threshold, the fourth unit is specifically configured to: The load of a cell selects a COMP cooperation mode for the UE. With reference to the sixth possible implementation of the second aspect, in a seventh possible implementation, the fourth unit is specifically configured to:

When the load of the first cell is greater than a preset third threshold, the COMP collaboration mode selected for the UE is a CBF collaboration mode.

With reference to the sixth possible implementation of the second aspect, in an eighth possible implementation, the fourth unit is specifically configured to:

When the load of the first cell is less than or equal to a preset third threshold, the COMP collaboration mode selected for the UE is any one of the following: a JT collaboration mode and a DCS collaboration mode.

With reference to the eighth possible implementation manner of the foregoing aspect, in a ninth possible implementation manner, when the load of the first cell is less than or equal to a preset third threshold, the fourth unit is specifically used to And selecting a COMP cooperation mode for the UE according to a signal to interference and noise ratio of the SRS signal received by the UE in the first cell to be queried.

With reference to the ninth possible implementation manner of the second aspect, in a tenth possible implementation manner, the fourth unit is specifically used to:

When the signal to interference and noise ratio of the SRS signal of the UE is greater than a preset fourth threshold, the COMP cooperation mode selected for the UE is a JT collaboration mode.

With reference to the tenth possible implementation manner of the second aspect, in the eleventh possible implementation manner, the fourth unit is specifically configured to:

When the signal to interference and noise ratio of the SRS signal of the UE is less than or equal to a preset fourth threshold, the COMP cooperation mode selected for the UE is a DCS cooperation mode.

In a third aspect, a communication system provided by the embodiment of the present invention includes the device of any of the foregoing.

In the above technical solution, the problem of lack of consideration for the whole network user feeling when the cooperative set selection and the cooperative mode selection in the COMP interference coordination algorithm are solved is solved, and the throughput performance benefit of the COMP technology is improved, thereby achieving the purpose of effectively improving the performance of the whole network. . DRAWINGS

1 is a schematic flowchart of a downlink interference coordination method according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a first downlink interference coordination apparatus according to an embodiment of the present invention; Schematic diagram of the structure of the downlink interference coordination device. detailed description

In the current COMP technology, the choice of collaboration set and collaboration mode is mainly based on the experience of the user of the service cell, and does not take into account the feelings of other users on the whole network, and may not achieve the purpose of improving the performance of the whole network. Therefore, the technical solution provided by the embodiment of the present invention solves the selection of the cooperation set and the cooperation mode in the interference coordination algorithm, thereby achieving the purpose of improving the performance of the entire network through interference coordination.

Referring to FIG. 1 , a downlink interference coordination method according to an embodiment of the present invention includes: Step 101: A base station determines that an actual transmit power of a first cell is less than or equal to a preset maximum transmit power.

4, a cluster consisting of M cells (Cell), M cells for power level adjustment, wherein M is an integer greater than or equal to 1, when selecting the optimal power level, under each candidate power level, Each resource block group (RBG) is virtually scheduled, and the power level is judged according to the virtual scheduling result. The virtual scheduling process is based on the assumed transmit power of each Cell in the cluster, and the utility functions of all the cells are respectively calculated, and the maximum utility function and the corresponding transmit power of each cell are the powers used for subsequent actual scheduling, that is, the actual transmission. power.

Wherein, at the power level p, the utility function on the kth RBG of the mth cell is defined as the following formula (1), and the formula may be referred to as a PF criterion:

Utmty _m ^k _p = m _a x(PF _p ) ne N _{( 1 )} where is the proportional fairness factor of the nth user, and N is the number of users.

The utility function sum is: MK

U _p =∑∑ tility^ _p

m=\ k=\ ( 2 )

Where K represents the total number of RBs.

When the period of cooperative scheduling and power control is reached, each cell is calculated according to the above formula, and the maximum utility function and the corresponding power level are the required power levels.

Step 102: The base station determines at least one UE and a cell where the at least one UE is located, where the at least one UE is a UE that interferes when the first cell uses a preset maximum transmit power to transmit a signal. The first cell is a cell that does not transmit at a preset maximum transmit power, but reduces the transmit power.

For example, the first cell is a cell G, and the user equipment of the neighboring cell that may be interfered by the first cell when the preset maximum transmit power is transmitted is the user equipment ^U J , and the corresponding neighboring cell is the cell ^, The U of severely disturbing ^C u has the following characteristics: at any transmission time interval (Transmission

In Time Interval, TTI), ^C '釆 uses the actual power (that is, the power lower than the preset maximum transmit power, ie, the power is reduced), the signal-to-noise ratio of ^^^, and the preset maximum emission There is a difference in the ^{U of} ^ when the power is transmitted.

The signal-to-noise ratio of the UE may also be referred to as the signal-to-noise ratio of the UE, that is, the ratio of the expected signal received by the UE to the sum of the interference received by the UE plus the noise floor of the device.

Thus, assuming that ^C 'preclude the use of the maximum transmission power of transmission signal of a predetermined ^C u ^ is the actual SNR of the transmission signal power of ^ ^ G Bian to hide noise ratio, the courage _{j Pi} - bile _{j P full} 〉73⁄4 _; where 73⁄4 represents the preset first threshold, which can be the default value or enter the configuration value of the device. The first threshold can be in dB, for example, the value can be 3dB, or 5dB, or any value between 3dB and 5dB.

Among them, the calculation of the signal-to-noise ratio of ^ can be as follows:

For the transmit power, the channel fading factor from the ^cell transmission point to ^, ^ is the cell G transmit power, is the channel fading factor from the G transmit point to ^, A is the cell transmit power, from the cell transmission point to the U The channel fading factor, ² is the UE receiver noise floor.

In summary, after the power patterns of all the cells are determined, each cell is assumed as the first cell to perform power reduction and preset maximum transmit power transmission, and is executed according to the above formula for each cell.

The calculation of (1)-(3), thereby selecting the user equipment of the neighboring cell of each cell, for example, determining the user equipment of the neighboring cell of a cell (such as the first cell) includes: the user equipment of the neighboring cell of G Calculate the signal-to-noise ratio of ^c u when the actual power and the maximum transmit power are transmitted, and compare the difference between the two SNRs with the threshold 73⁄4; if the difference is greater than the threshold 73⁄4, determine the The user equipment of the neighboring cell is interfered by the first cell, that is, the neighboring cell is determined to be a cell interfered by the first cell.

Step 103: Modify an attribute of the at least one UE to a coordinated multi-point COMP user, and add the first cell to a COMP collaboration set of the UE.

After determining the interfered UE according to step 102, the UE can be a COMP user, having a COMP user attribute, participating in a subsequent cell scheduling process, and the corresponding first cell can be used as its COMP collaboration set.

Step 104: The base station determines the quantity, and selects a COMP cooperation mode for the UE according to the quantity, where the quantity is the total number of cells in which the at least one UE is located.

After the interfered neighboring cell calculated in step 102, the number of neighboring cells interfered by the first cell is counted, that is, the number of cells that the first cell may interfere with is obtained. The COMP cooperation mode can be adaptively determined according to the number of cells that are interfered. When the number of neighboring cells that are interfered is greater than the preset second threshold n, the first cell uses the preset maximum transmit power to transmit signals. The UE selects Dynamic Coordinated Scheduling (DCS), that is, the first 'zone is used as a zero-power cell, and no signal is sent. Otherwise, when the number of neighboring cells interfered is not greater than the preset second threshold n, The COMP cooperation mode selected by the UE interfered with when the first cell uses the preset maximum transmit power to transmit signals is a cooperative mode of JT, DCS or CBF. The second threshold n can be a default value or input a configuration value of the device. For example, the value of the second threshold may be 2 or 3.

Optionally, when the first cell uses the preset maximum transmit power to transmit a signal, the UE selects a COMP cooperation mode that is a cooperative mode of the JT, the DCS, or the CBF, and includes: according to the load of the first cell. The UE selects the COMP collaboration mode.

For example, the selecting a COMP cooperation mode for the UE according to the load of the first cell includes: when the load of the first cell is greater than a preset third threshold, the base station uses a preset maximum transmission for the first cell. When the power of the first cell is less than or equal to the preset third threshold, the base station uses the preset maximum for the first cell. The COMP cooperation mode selected by the UE that interferes with the transmission of the power transmission signal is a JT cooperation mode or a DCS cooperation mode. The third threshold can be the default value or enter the configuration value of the device. The value of the third threshold may be the ratio of the load to the total resources of the device (ie, resource utilization). For example, the resource utilization is 30% corresponding to the load.

Optionally, when the load of the first cell is less than or equal to a preset third threshold, the base station interferes with the UE when the first cell uses the preset maximum transmit power to transmit a signal. The signal-to-noise ratio of the SRS signal received by the 'J area is the COMP cooperation mode selected by the UE.

For example, the base station selects a COMP cooperation mode for the UE according to the signal to interference and noise ratio of the SRS signal received by the UE in the first cell according to the first cell using the preset maximum transmit power, including: When the signal to interference and noise ratio of the SRS signal of the UE is greater than a preset fourth threshold, the COMP cooperation mode selected by the base station for the UE is a JT collaboration mode, where the fourth threshold may be a default value or input the configuration of the device. value. The value of the fourth threshold may be in dB, for example, the value is OdB; or, when the signal to interference and noise ratio of the SRS signal of the UE is less than or equal to a preset fourth threshold, the base station selects the UE. The way of COMP collaboration is DCS collaboration.

Corresponding to the above method, referring to FIG. 2, a downlink interference coordination apparatus according to an embodiment of the present invention may be used to perform the method provided by the foregoing embodiment. For example, the device includes: a first unit 201, configured to determine that an actual transmit power of the first cell is less than or equal to a preset maximum Transmit power

The second unit 202 is configured to determine at least one user equipment UE and a cell where the at least one UE is located, where the at least one UE is a UE that interferes when the first cell uses a preset maximum transmit power to transmit a signal;

The third unit 203 is configured to modify an attribute of the at least one UE to a coordinated multi-point COMP user, and join the first cell to a COMP collaboration set of the UE.

The fourth unit 204 is configured to determine a quantity, and select a COMP cooperation mode for the UE according to the quantity, where the quantity is a total number of cells in which the at least one UE is located.

Optionally, before determining that the actual transmit power of the first cell is less than or equal to the preset maximum transmit power, the first unit is further configured to: determine an actual transmit power of the first cell.

Optionally, the second unit determines the at least one UE by:

Optionally, after determining the at least one UE, the second unit further determines a total number of cells in which the at least one UE is located.

Optionally, when the fourth unit selects a COMP collaboration mode for the UE according to the quantity, the method is specifically configured to: if the quantity is greater than a preset second threshold, the COMP collaboration mode selected for the UE is dynamic Collaborate to schedule DCS.

Optionally, when the fourth unit selects a COMP collaboration mode for the UE according to the quantity, specifically, if the quantity is less than or equal to a preset second threshold, the COMP collaboration mode selected for the UE For any of the following: Joint transport JT collaboration, dynamic collaborative scheduling DCS collaborators And cooperative beam CBF cooperative mode.

Optionally, if the quantity is less than or equal to a preset second threshold, the fourth unit selects a COMP cooperation mode for the UE according to the load of the first cell.

Optionally, when the fourth unit selects a COMP collaboration mode for the UE according to the load of the first cell, specifically, when the load of the first cell is greater than a preset third threshold, The COMP cooperation mode selected by the UE is the CBF cooperation mode.

Optionally, when the fourth unit selects a COMP collaboration mode for the UE according to the load of the first cell, specifically, when the load of the first cell is less than or equal to a preset third threshold, The COMP collaboration mode selected for the UE is any one of the following: a JT collaboration mode and a DCS collaboration mode.

Optionally, when the load of the first cell is less than or equal to a preset third threshold, the fourth unit is configured according to a signal to interference and noise ratio of the SRS signal received by the UE in the first cell to be referred to. The UE selects the COMP collaboration mode.

Optionally, the fourth unit is specifically configured to: when the UE selects a COMP cooperation mode according to the SRS signal strength received by the UE in the first cell, the signal to interference and noise ratio of the SRS signal of the UE When the fourth threshold is greater than the preset threshold, the COMP collaboration mode selected for the UE is a JT collaboration mode.

Optionally, the fourth unit is specifically configured to: when the UE selects a COMP cooperation mode according to the SRS signal strength received by the UE in the first cell, the signal to interference and noise ratio of the SRS signal of the UE When less than or equal to the preset fourth threshold, the COMP cooperation mode selected for the UE is a DCS cooperation mode.

Corresponding to the above method, referring to FIG. 3, an embodiment of the present invention provides another downlink interference coordination apparatus, which may be used to perform the method provided by the foregoing embodiment. For example, the device includes: a processor 301, configured to execute the foregoing method, by using a pre-configured computer program, to implement the following functions: determining that an actual transmit power of the first cell is less than or equal to a preset maximum transmit power; determining at least one user a device UE and a cell in which the at least one UE is located, where the at least one UE is a UE that interferes when the first cell uses a preset maximum transmit power to transmit a signal; The attribute of the UE is modified to cooperate with the multi-point COMP user, and the first 'zone is added to the COMP collaboration set of the UE; the quantity is determined, and the COMP cooperation mode is selected for the UE according to the quantity, where the quantity is The total number of cells in which at least one UE is located.

The apparatus may further include: a memory 302 for storing the computer program code described above, and storing data generated during execution of the program.

Optionally, before the determining, by the processor 301, that the actual transmit power of the first cell is less than or equal to the preset maximum transmit power, the method further includes: determining, by the base station, an actual transmit power of the first cell.

Optionally, the processor 301 determines the at least one UE by:

The processor 301 determines a first signal to noise ratio and a second signal to noise ratio. The first signal to noise ratio is: when the first cell uses a preset maximum transmit power to transmit a signal, the first UE detects a first signal-to-noise ratio; the second signal-to-noise ratio is: a second signal-to-noise ratio detected by the first UE when the first cell transmits a signal by using an actual transmit power; The serving cell of the UE is a second cell, and the second cell is a neighboring cell of the first cell;

When the difference between the first signal to noise ratio and the second signal to noise ratio is greater than a preset first threshold, the base station determines that the first UE uses a preset maximum transmission for the first cell The UE that transmits 4 when the power is transmitted.

Optionally, after the processor 301 determines the at least one UE, the processor 301 determines a total number of cells in which the at least one UE is located.

Optionally, the processor 301 selects a COMP collaboration mode for the UE according to the quantity, where: if the quantity is greater than a preset second threshold, the COMP collaboration mode selected by the processor 301 for the UE is dynamic collaborative scheduling. DCS mode.

Optionally, the processor 301 selects a COMP collaboration mode for the UE according to the quantity, where: if the quantity is less than or equal to a preset second threshold, the COMP collaboration mode selected by the processor 301 for the UE is Either: Joint transmission JT collaboration mode, dynamic cooperative scheduling DCS cooperation mode and cooperative beam CBF cooperation mode.

Optionally, if the quantity is less than or equal to the second threshold, the processor 301 selects a COMP cooperation mode for the UE according to the load of the first cell. Optionally, the processor 301 selects a COMP cooperation mode for the UE according to the load of the first cell, where: when the load of the first cell is greater than a preset third threshold, the processor 301 is the UE. The selected COMP collaboration mode is CBF collaboration mode.

Optionally, the processor 301 selects a COMP cooperation mode for the UE according to the load of the first cell, where: when the load of the first cell is less than or equal to a preset third threshold, the processor 301 is The COMP collaboration mode selected by the UE is any of the following: JT collaboration mode and DCS collaboration mode.

Optionally, when the load of the first cell is less than or equal to a preset third threshold, the processor 301 selects, according to the signal to interference and noise ratio of the SRS signal received by the UE in the first cell to be the UE. COMP collaboration.

Optionally, the processor 301 selects a COMP cooperation mode for the UE according to a signal to interference and noise ratio of the SRS signal received by the UE in the first cell, including: when a signal to interference and noise ratio of the SRS signal of the UE is greater than When the fourth threshold is preset, the COMP cooperation mode selected by the processor 301 for the UE is a JT collaboration mode.

Optionally, the processor 301 selects a COMP cooperation mode for the UE according to the signal to interference and noise ratio of the SRS signal received by the UE in the first cell, including: when the signal to interference and noise ratio of the SRS signal of the UE is less than Or equal to the preset fourth threshold, the COMP cooperation mode selected by the processor 301 for the UE is a DCS cooperation mode.

Embodiments of the present invention can be combined with each other and, and applied to an LTE system.

A communication system according to an embodiment of the present invention includes any of the devices described in the foregoing embodiments of the present invention.

In summary, the interference coordination method combining the CSPC and the COMP in the embodiment of the present invention solves the problem that the user of the whole network feels lack of consideration when selecting the collaborative set and the cooperative mode in the COMP, and helps to improve the throughput of the COMP technology. The performance gain of the quantity, wherein, by the joint scheduling and power control (CSPC), the selection of the COMP coordinated cell, the low power resource optimized by the CSPC is used as the coordinated cell of the COMP; according to the number of cells that the power reduction resource cell may interfere with, Choice of COMP collaboration mode; SINR difference between reduced power and preset maximum transmit power during CSPC calculation Larger users are candidates for COMP users.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowcharts and/or block diagrams, and combinations of flow and/or blocks in the flowcharts and/or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing apparatus. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the art that, Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and The spirit and scope of the embodiments of the present invention are departed. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

Rights request

1. A downlink interference coordination method, characterized in that the method includes:

The base station determines that the actual transmit power of the first cell is less than or equal to the preset maximum transmit power; the base station determines at least one user equipment UE and the cell in which the at least one UE is located, and the at least one UE is the first cell UEs that are interfered with when transmitting signals with the preset maximum transmit power;

The base station modifies the attributes of the at least one UE to be a coordinated multipoint COMP user, and adds the first zone to the COMP coordination set of the UE;

The base station determines the number, and selects the COMP cooperation mode for the UE according to the number, where the number is the total number of cells in which the at least one UE is located.

2. The method according to claim 1, characterized in that, before the base station determines that the actual transmit power of the first cell is less than or equal to the preset maximum transmit power, it further includes: the base station determines that the actual transmit power of the first cell is less than or equal to the preset maximum transmit power. actual transmit power.

3. The method according to claim 1 or 2, characterized in that the base station determines the at least one UE in the following manner:

The base station determines a first signal-to-noise ratio and a second signal-to-noise ratio; wherein, the first signal-to-noise ratio is: When the first cell transmits a signal using the preset maximum transmission power, the first UE detects the first signal-to-noise ratio; the second signal-to-noise ratio is: when the first cell is transmitting signals using actual transmit power, the second signal-to-noise ratio detected by the first UE; the first signal-to-noise ratio The serving cell of the UE is a second cell, and the second cell is a neighboring cell of the first cell;

When the difference between the first signal-to-noise ratio and the second signal-to-noise ratio is greater than a preset first threshold, the base station determines that the first UE adopts a preset maximum transmission for the first cell. The power transmitted by the signal reaches the UE.

4. The method according to claim 1, characterized in that, after the base station determines the at least one UE, the base station determines the total number of cells in which the at least one UE is located.

5. The method according to any one of claims 1 to 4, characterized in that, the base station is based on The number selects a COMP cooperation mode for the UE, including:

If the number is greater than the preset second threshold, the COMP cooperation mode selected by the base station for the UE is the dynamic cooperative scheduling DCS mode.

6. The method according to any one of claims 1 to 4, characterized in that the base station selects the COMP cooperation mode for the UE according to the number, including:

If the number is less than or equal to the preset second threshold, the COMP collaboration mode selected by the base station for the UE is any of the following: joint transmission JT collaboration mode, dynamic collaborative scheduling DCS collaboration mode, and cooperative beam CBF collaboration mode .

7. The method according to claim 6, wherein if the number is less than or equal to the second threshold, the base station selects the COMP cooperation mode for the UE according to the load of the first cell.

8. The method according to claim 7, wherein the base station selects the COMP cooperation mode for the UE according to the load of the first cell, including:

When the load of the first cell is greater than the preset third threshold, the COMP cooperation mode selected by the base station for the UE is the CBF cooperation mode.

9. The method according to claim 7, wherein the base station selects the COMP cooperation mode for the UE according to the load of the first cell, including:

When the load of the first cell is less than or equal to the preset third threshold, the COMP collaboration mode selected by the base station for the UE is any of the following: JT collaboration mode and DCS collaboration mode.

10. The method according to claim 9, characterized in that, when the load of the first cell is less than or equal to a preset third threshold, the base station determines the SRS received by the UE in the first cell. The signal-to-interference-to-noise ratio of the signal selects the COMP cooperation mode for the UE.

11. The method according to claim 10, wherein the base station selects the COMP cooperation mode for the UE based on the signal-to-interference-to-noise ratio of the SRS signal received by the UE in the first cell, including:

When the signal-to-interference-to-noise ratio of the SRS signal of the UE is greater than the preset fourth threshold, the COMP cooperation mode selected by the base station for the UE is the JT cooperation mode.

12. The method according to claim 10, characterized in that: the base station determines whether the UE The signal-to-interference-to-noise ratio of the SRS signal received in the first cell selects the COMP cooperation mode for the UE, including:

When the signal-to-interference-to-noise ratio of the SRS signal of the UE is less than or equal to the preset fourth threshold, the COMP cooperation mode selected by the base station for the UE is the DCS cooperation mode.

13. A downlink interference coordination device, characterized in that the device includes:

The first unit is used to determine that the actual transmit power of the first cell is less than or equal to the preset maximum transmit power;

The second unit is used to determine at least one user equipment UE and the cell in which the at least one UE is located. The at least one UE is a UE that is interfered with when the first cell transmits a signal using the preset maximum transmission power;

The third unit is used to modify the attributes of the at least one UE to a coordinated multipoint COMP user, and add the first cell to the COMP cooperation set of the UE;

The fourth unit is used to determine the number, and select the COMP cooperation mode for the UE according to the number, where the number is the total number of cells in which the at least one UE is located.

14. The device according to claim 13, characterized in that, before determining that the actual transmit power of the first cell is less than or equal to the preset maximum transmit power, the first unit is further configured to: determine that the first cell the actual transmit power.

15. The device according to claim 13 or 14, characterized in that the second unit determines the at least one UE in the following manner:

Determine a first signal-to-noise ratio and a second signal-to-noise ratio; wherein, the first signal-to-noise ratio is: when the first cell transmits a signal using a preset maximum transmit power, the first signal detected by the first UE Signal-to-noise ratio; The second signal-to-noise ratio is: When the first cell is transmitting signals using actual transmit power, the second signal-to-noise ratio detected by the first UE; Service of the first UE The cell is a second cell, and the second cell is a neighboring cell of the first cell;

When the difference between the first signal-to-noise ratio and the second signal-to-noise ratio is greater than a preset first threshold, it is determined that the first UE uses the preset maximum transmission power to transmit a signal for the first cell. UE being interfered with.

16. The apparatus according to claim 13, wherein the second unit is further configured to: after determining the at least one UE, determine the total number of cells in which the at least one UE is located.

17. The device according to any one of claims 13-16, characterized in that the fourth unit is specifically used for:

If the number is greater than the preset second threshold, the COMP cooperation mode selected for the UE is the dynamic cooperative scheduling DCS mode.

18. The device according to any one of claims 13-16, characterized in that the fourth unit is specifically used for:

If the number is less than or equal to the preset second threshold, the COMP cooperation mode selected for the UE is any one of the following: joint transmission JT cooperation mode, dynamic cooperative scheduling DCS cooperation mode and cooperative beam CBF cooperation mode.

19. The device according to claim 18, characterized in that, if the number is less than or equal to a preset second threshold, the fourth unit is specifically configured to: provide the UE with the load of the first cell. Select the COMP collaboration method.

20. The device according to claim 19, wherein the fourth unit is specifically configured to: when the load of the first cell is greater than a preset third threshold, select the COMP cooperation mode for the UE. It is a CBF collaboration method.

21. The device according to claim 19, wherein the fourth unit is specifically configured to: when the load of the first cell is less than or equal to a preset third threshold, select the

The COMP collaboration mode is any of the following: JT collaboration mode and DCS collaboration mode.

22. The apparatus according to claim 21, wherein when the load of the first cell is less than or equal to a preset third threshold, the fourth unit is specifically configured to: The signal-to-interference-to-noise ratio of the SRS signal received by the first cell selects the COMP cooperation mode for the UE.

23. The device according to claim 22, wherein the fourth unit is specifically configured to: when the signal-to-interference-to-noise ratio of the SRS signal of the UE is greater than a preset fourth threshold, select for the UE The COMP collaboration mode is JT collaboration mode.

24. The device according to claim 23, characterized in that, the fourth unit is specifically used for: When the signal-to-interference-to-noise ratio of the SRS signal of the UE is less than or equal to the preset fourth threshold, the COMP cooperation mode selected for the UE is the DCS cooperation mode.

25. A communication system, including the device according to any one of claims 13-24.