WO2014180097A1

WO2014180097A1 - Coordinating beamforming method and apparatus

Info

Publication number: WO2014180097A1
Application number: PCT/CN2013/085551
Authority: WO
Inventors: 董伟
Original assignee: 华为技术有限公司
Priority date: 2013-05-10
Filing date: 2013-10-21
Publication date: 2014-11-13
Also published as: CN103281792B; CN103281792A

Abstract

Disclosed are a coordinating beamforming (CBF) method and apparatus. The method comprises: for several resource block groups (RBGs) corresponding to a bandwidth of each cell to be optimized, acquiring a power optimization value corresponding to each RBG; and for each RBG, based on the power optimization value corresponding to the RBG, executing CBF on a user equipment (UE) scheduled in the RBG, so as to solve a problem that spatial interference coordination is only performed on a coordinating UE resulting in that service quality of a UE at an edge of a cell cannot be effectively enhanced in CBF technologies.

Description

Cooperative beam forming method and device The present application claims to be submitted to the Chinese Patent Office on May 10, 201, the application number is

2 01 31 01 7 351 1. The priority of the Chinese patent application, which is incorporated herein by reference. Technical field

The invention relates to the field of communication technologies, and particularly relates to a cooperative beamforming method and device. Background technique

In the Long Term Evolution Advanced (LTE-A), the inter-cell interference suppression technology becomes one of the important technologies in LTE-A because the spectrum multiplexing coefficient is 1 and the small-area interference is large. The inter-cell interference suppression technology in LTE-A mainly includes: small-interval interference randomization technology, small-interval interference cancellation technology, and small-interval interference coordination/avoidance technology.

The Coordinated Multipoint Transmission/Reception (CoMP) technology cooperates with multiple neighboring base stations or nodes to provide services for a cell edge user equipment to reduce interference received by cell edge user equipment and improve the cell area. Quality of service for edge user equipment. According to the degree of sharing of user equipment data and channel state information, CoMP technology can be further divided into two types: Joint-Processing (JP) technology and Coordinated Scheduling/Beamforming (CS/CBF) technology. Among them, CS/CBF technology is mainly divided into Coordinating Beam Switch (CBS) technology and Coordinating Beamforming (CBF) technology. Different types of CoMP technologies have different implementation difficulties and performance gains.

Among them, CBF technology has more advantages than JP and CBS technologies, especially in Time Division Duplexing (TDD) systems where the uplink and downlink channels have mutual heterogeneity. The following is a basic idea of the CBF technology. The cell reduces the interference to the edge UE of the cell by adjusting the downlink transmission weight of the data channel in the neighboring cell. In the CBF technology, the UE transmits data only in the serving cell (ie, the Serving Cell of the UE). The base station does not need to exchange service data, and only needs to exchange certain sounding reference signal (SRS) configuration information and scheduling information. Therefore, the interaction burden of the X2 interface between the base stations can be greatly reduced.

In the CBF technology, the UE performs an A3 event to trigger the selection of the CBF UE, and the purpose is to select a UE located at the cell edge and having a lower signal-to-interference ratio (SINR), so that the UE acquires the CBF. Gain. The CBF UE is selected according to the reference signal received power (RSRP) difference and the channel quality indicator (CQI) criterion, that is, whether the CQI of the UE reporting the A3 event is smaller than the CQI threshold, and if so, The UE is determined to be a CBF UE, otherwise, the UE is determined to be a normal UE. The base station needs to report the RSRP value of the neighboring cells based on the A3 event. Therefore, when the CBF UE is selected, the base station needs to reach the preset threshold value of the absolute value of the RSRP difference between the serving cell and the serving cell of the CBF UE. One or two neighboring areas are used as cooperative cells. A plurality of coordinated cells corresponding to one CBF UE form a cooperative set.

After determining the cooperation set of a certain CBF UE, the base station also needs to determine the coordinated UE of the CBF UE from several coordinated cells of the CBF UE.

The base station generally uses UEs in the coordinated cell that satisfy the following three conditions as the cooperative UE:

(1) The data volume of the UE satisfies the resource block group (RBG) size; (2) determining that the correlation between the UE and the CBF UE is less than a preset correlation threshold;

(3) The CQI of the UE is greater than the CQI threshold.

In the CBF technology, the base station performs scheduling on the UE according to the type of the UE, performs priority scheduling on the CBF UE, and performs joint scheduling on the coordinated UE and the CBF UE in the cooperation set, that is, when the CBF UE is scheduled, the coordinated cell is in the same RBG. The corresponding coordinated UE reserves resources.

The base station performs independent scheduling on the common UEs other than the coordinated UE and the CBF UE, and only needs to pre-allocate resources in the serving cell of the normal UE, and the scheduling for the normal UE is performed after performing joint scheduling on the CBF UE and the coordinated UE. Independently adjusting the ordinary UEs in different cells separately Degree.

For example, referring to FIG. 1, Cell 1 and Cell 2 are cooperative cells in a collaborative set of Cell O. When the base station allocates the CBF UE big data packet on the RBG2, in addition to the corresponding RBG resource allocated in the Cell 0, the corresponding RBG resource needs to be reserved in the Cell 1 and the Cell 2 (see Cell 1 and Cell 2 in FIG. 1). The shaded RBG), the two shaded RBGs are reserved for the coordinated UE corresponding to the CBF UE, and when the RBG6 schedules the large packets of the normal UE, only the RBG resources of the Cell 0 are pre-allocated, and the RBG resources are not required. Reserve corresponding RBG resources in Cell 1 and Cell 2.

The process of coordinating the airspace interference of the cell edge UE by the CBF technology will be described below with reference to FIG. The base station performs virtual scheduling, determines CBF UEs and corresponding cooperative UEs in Cell 1 and Cell 2, and instructs the CBF UE and the corresponding cooperative UE to reserve the same time-frequency resource.

Referring to FIG. 2, Cell 1 exchanges SRS resource allocation information and scheduling resource information of the cell edge UE 1 to the coordinated cell Cell 2;

Cell 2 estimates a channel between Cell 2 and UE 1 according to the received SRS resource allocation information of UE 1, and obtains a beamforming (BF) weight of UE 1;

The Cell 2 finds the UE 2 occupying the same time-frequency resource in the Cell 2 according to the scheduling resource information of the UE 1 (the UE 2 is the coordinated UE of the UE 1 determined by the base station when performing the virtual scheduling), and the UE is in the Cell 2 1 and the BF weight of the UE 2 are subjected to Schmidt orthogonalization processing, and then the BF weight of the UE 2 is renormalized to obtain the BF weight value used by the UE 2 for actual transmission.

In the above process, the base station performs Schmitt orthogonalization processing and normalization processing on the BF weight of the UE 2, which inevitably lowers the BF weight of the UE 2, and it can be seen that the current CBF technology can only reduce the current cell. (ie, Cell l) The BF weight used by the actual UE (ie, UE 2) of the coordinated UE (ie, UE 2) to reduce the interference to the current cell edge UE, because the above process only performs airspace for the coordinated UE. Interference coordination, therefore, multi-cell joint resources cannot be efficiently allocated, and the reduced interference effect that can be achieved is limited, and the quality of service of UEs at the edge of the cell cannot be effectively improved. Summary of the invention The embodiments of the present invention provide a cooperative beamforming method and device, which are used to solve the problem that only the coordinated UEs perform spatial domain interference coordination in the CBF technology, and the service quality of the cell edge UE cannot be effectively improved.

The specific technical solutions provided by the embodiments of the present invention are as follows:

In a first aspect, a cooperative beamforming method is provided, including:

Obtaining a power optimization value corresponding to each RBG for each resource block group RBG corresponding to the bandwidth of each cell to be optimized;

For each RBG, a cooperative beamforming CBF is performed on the user equipment UE scheduled by the RBG based on the power optimization value corresponding to the RBG.

With reference to the first aspect, in a first possible implementation manner, obtaining a power optimization value corresponding to each RBG includes:

For each RBG, based on the different power lifting values corresponding to the RBG, respectively obtain the corresponding total transmission efficiency values, and select the power lifting value corresponding to the maximum transmission efficiency total value as the power optimization value corresponding to the RBG.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner, the corresponding total value of the transmission efficiency is separately obtained based on the different power lifting values corresponding to the RBG, specifically: according to the RBG The type of the UE to be scheduled is obtained based on different power lifting values corresponding to the RBG, and the corresponding total transmission efficiency values are respectively obtained.

With reference to the first aspect, in a third possible implementation, the power optimization value corresponding to each RBG is obtained, which specifically includes:

Determining a CBF UE and a coordinated UE in the plurality of cells to be optimized;

The preset power lifting value is used as the power optimization value corresponding to the RBG, and the preset power lifting value is one of the different power lifting values corresponding to the RBG, where the RBG is scheduled to be determined by the RBG. Power lifting value; or,

For the RBG of the scheduled normal UE, based on the different power lifting values corresponding to the RBG, respectively obtain corresponding total transmission efficiency values, and select a power lifting value corresponding to the maximum total transmission efficiency value, as the power optimization corresponding to the RBG. Value, where the normal UE is a determined CBF UE and a coordinated UE Outside the UE.

With reference to any one of the foregoing possible implementation manners of the foregoing aspect, in a fourth possible implementation, each of the power lifting values corresponding to the RBG is used to obtain a corresponding total transmission efficiency value, which includes:

Determining a maximum transmission efficiency of the UE in the cell to which the RBG belongs when the cell to which the RBG belongs is used; and

Determining a maximum transmission efficiency of the UE in the coordinated cell when the coordinated cell of the cell to which the RBG belongs is using the current transmit power value;

The sum of the maximum transmission efficiency of the UE in the cell to which the RBG belongs and the maximum transmission efficiency of the UE in the corresponding coordinated cell are used as the total transmission efficiency value obtained by the RBG based on the power lifting value.

With reference to the fourth possible implementation manner of the foregoing aspect, in a fifth possible implementation manner, the current transmit power value used by the coordinated cell of the cell to which the RBG belongs is: determining the corresponding RBG in the coordinated cell. After the primary power optimization value, the power optimized transmit power value is performed according to the last power optimization value.

In a second aspect, a cooperative beamforming device is provided, including:

An obtaining module, configured to acquire, according to a plurality of resource block groups RBG corresponding to the bandwidth of each cell to be optimized, a power optimization value corresponding to each RBG;

And an execution module, configured to perform, for each RBG, a coordinated beamforming CBF for the user equipment UE scheduled by the RBG based on the power optimization value corresponding to the RBG.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the acquiring module is specifically configured to:

With reference to the first possible implementation of the second aspect, in a second possible implementation, the acquiring module is specifically configured to: According to the type of the UE scheduled on the RBG, the corresponding total transmission efficiency value is respectively obtained based on different power lifting values corresponding to the RBG.

With reference to the second aspect, in a third possible implementation, the acquiring module is specifically configured to: determine a CBF UE and a coordinated UE in the plurality of to-be-optimized cells; and perform scheduling to the determined CBF UE or the coordinated UE. The RBG, the preset power lifting value is used as the power optimization value corresponding to the RBG, wherein the preset power lifting value is a specified power lifting value of the different power lifting values corresponding to the RBG; or, for scheduling The RBG of the normal UE obtains the corresponding total transmission efficiency value based on the different power lifting values corresponding to the RBG, and selects the power lifting value corresponding to the maximum transmission efficiency total value as the power optimization value corresponding to the RBG, where The normal UE is a UE other than the determined CBF UE and the coordinated UE.

With reference to any of the foregoing possible implementation manners of the foregoing aspect, in the fourth possible implementation, the acquiring module is specifically configured to:

Determining a maximum transmission efficiency of the UE in the cell to which the RBG belongs when the cell to which the RBG belongs is used; and determining, when the coordinated cell of the cell to which the RBG belongs, using the current transmit power value, the UE in the coordinated cell The transmission efficiency maximum value; the sum of the maximum transmission efficiency of the UE in the cell to which the RBG belongs and the maximum transmission efficiency of the UE in the corresponding coordinated cell as the total transmission efficiency value obtained by the RBG based on the power lifting value.

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, the current transmit power value used by the coordinated cell of the cell to which the RBG belongs is determined by the acquiring module, where: determining the coordinated cell After the last power optimization value of the RBG is matched, the power optimization value after the power optimization is performed according to the last power optimization value.

In the embodiment of the present invention, for each RBG corresponding to the bandwidth of the cell to be optimized, the power optimization value corresponding to each RBG is obtained, and for each RBG, based on the power optimization value corresponding to the RBG, the RBG scheduling is performed on the RBG. The UE performs the CBF, so as to coordinate the call of the time-frequency resource, implement the time-frequency domain optimization, implement the power domain optimization based on the power optimization value corresponding to the RBG, and, on the basis of realizing the time-frequency domain and the power domain optimization, Perform CBF to achieve interference coordination in the airspace, making The multi-cell joint resources are efficiently allocated. The UEs in the multi-cell can avoid mutual interference in the time-frequency domain, the power domain and the airspace, and the service quality of the edge UE is improved to the utmost. DRAWINGS

FIG. 1 is a schematic diagram of scheduling of a CBF UE;

Figure 2 is a schematic diagram of data interaction in CBF technology;

3 is a flow chart of cooperative beamforming designed according to an embodiment of the present invention;

4 is a schematic diagram of dividing a bandwidth into a plurality of RBGs according to an embodiment of the present invention; FIG. 5 is a flowchart of a JPSC algorithm designed according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a cooperative beamforming device designed according to an embodiment of the present invention. detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

Referring to FIG. 3, a cooperative beamforming method designed according to an embodiment of the present invention includes the following steps.

Step 301: Obtain a power optimization value corresponding to each RBG for each resource block group RBG corresponding to the bandwidth of each cell to be optimized.

The base station divides the bandwidth of each cell to be optimized into a number of RBGs. Figure 4 shows a possible bandwidth division. As shown in Figure 4, the base station divides the bandwidth of Cell 1 and Cell 2 into n RBGs. The size of each RBG is the same. The RBG i and Cell of Cell 1 are the same. RBG i of 2 is corresponding, where n is a positive integer and i is a positive integer not greater than n.

Step 302: Perform CBF on the UE scheduled by the RBG according to the power optimization value corresponding to the RBG for each RBG. The execution body of the above steps 301 and 302 may be a base station. In an actual application, after determining the power optimization value, the base station performs power domain optimization, so that the data transmission of the UE under the base station can be optimal.

Preferably, step 301 can be, but is not limited to, obtaining power optimization values corresponding to each RBG in any of the following three manners:

Manner 1: For each RBG, based on the different power lifting values corresponding to the RBG, respectively obtain corresponding total transmission efficiency values, and select a power lifting value corresponding to the maximum total transmission efficiency value as the power optimization value corresponding to the RBG. .

Manner 2: For each RBG, according to the type of the UE scheduled on the RBG, based on the different power lifting values corresponding to the RBG, respectively obtain corresponding total transmission efficiency values, and select a maximum transmission efficiency total value corresponding thereto. The power lifting value is used as the power optimization value corresponding to the RBG.

Manner 3: determining a CBF UE and a coordinated UE in the foregoing plurality of to-be-optimized cells; and determining, according to the RBG that is scheduled to the determined CBF UE or the coordinated UE, a preset power lifting value as a power optimization value corresponding to the RBG, where the foregoing pre- The power lifting value is a specified power lifting value of the different power lifting values corresponding to the RBG (the preset power lifting value is generally OdB in actual application); or, for the scheduled RBG of the normal UE, based on the RBG corresponding And the power transfer value corresponding to the total value of the maximum transmission efficiency is selected as the power optimization value corresponding to the RBG, wherein the normal UE is a determined CBF UE and Cooperating UEs other than UEs.

In the above three manners, based on each power lifting value corresponding to the RBG, respectively, the corresponding total transmission efficiency value is obtained, which specifically includes:

The sum of the transmission efficiency maximum value of the UE in the cell to which the RBG belongs and the maximum transmission efficiency of the UE in the corresponding coordinated cell is used as the total transmission efficiency value obtained by the RBG based on the power lifting value.

The current transmit power value used by the coordinated cell of the cell to which the RBG belongs is: After the last power optimization value of the RBG is matched in the zone, the power optimization value after the power optimization is performed according to the last power optimization value.

In a practical application, the base station can implement the foregoing method 1 by using, but not limited to, a Joint Scheduler and Power Control (JSPC) algorithm. In this case, when performing power domain optimization for each cell to be optimized based on the JSPC algorithm, the base station can sequentially determine the power corresponding to each RBG according to the method of single user beamforming (SU-BF). Optimized value.

Referring to FIG. 5, in the implementation process of the JSPC algorithm, each transmission time interval (TTI) starts, the base station detects whether the JSPC optimization period is reached, and if so, performs joint scheduling power control for each cell in turn. The order may be in the order of the cell identifier (Identifier, ID) from small to large, otherwise the current transmit power value is used for downlink scheduling.

Step 501: The base station determines that each TTI starts.

Preferably, the base station can use a timer to determine the start of each TTI.

Step 502: The base station determines whether the JSPC period is reached. If the step 504 is performed, otherwise step 503 is performed.

Step 503: The base station uses the current transmit power value in the Downlink (DL) scheduler (Scheduler).

The current transmit power value corresponding to each cell is the initial transmit power value, or the transmit power value of the corresponding cell after the last power optimization based on the power optimization value.

In practical applications, it can be assumed that the initial transmission power of all cells in the JPSC algorithm is full power, and the initial power lifting value is 0 dB.

Step 504: The base station determines a cell that needs to perform optimization using the JSPC algorithm, and optimizes the ranking of the cell.

Step 505: The base station selects a cell to be optimized according to an order of optimized ordering.

Step 506: The base station sequentially traverses each of the selectable power lifting values for each of the RBGs selected in the step 505, and selects a power lifting value corresponding to the maximum total transmission efficiency value. Optimize the power for the corresponding RBG.

For any power lifting value of the RBG, the maximum value of the transmission efficiency (Utility) is generally the maximum value of the Proportional Fair (PF) weight of the UE in the cell to which the RBG belongs, or the instantaneous rate R of the UE in the cell to which the RBG belongs. — ins maximum. PF weight = R - ins / R - avg, where R - ins is the instantaneous rate of the UE, and R - avg is the average rate of the UE.

For example, when the power lifting value is 2 dB, the utility of the cell A in the RBG0 is the maximum value of the PF weight of the UE in the cell A, or the maximum value of the R_ins of the UE in the cell A.

For any power lifting value of the RBG, the total transmission efficiency (ie, Utility) is the sum of the maximum transmission efficiency of the UE in the cell to which the RBG belongs and the maximum transmission efficiency of the UE in the corresponding coordinated cell.

For example, the cell to be optimized determined by the base station includes the cell A, the cell B, and the cell C. In the current JSPC cycle, the cell being optimized is a cell.

When the power lifting value is 2dB, the total transmission efficiency of cell A at RBG0 is:

When the power lifting value is 2dB, the cell A is in the RBG0 Utility+ when the cell B uses the current transmit power value, and the cell B is in the RBG0 Utility+ when the cell C uses the current transmit power value.

Utility of RBG0.

In the JSPC optimization period of the cell A, the power-up and down value corresponding to the total value of the maximum transmission efficiency on the RBG0 is the power optimization value corresponding to the RBG0 of the cell A.

Step 507: The base station detects whether there is still an unoptimized cell, and if yes, returns to step 505, otherwise, step 508 is performed.

Step 508: The power optimization value of each cell is stored in the DL Scheduler as the current transmit power value before the arrival of the next JSPC cycle, and returns to step 503.

The power lifting value corresponding to an RBG may also be referred to as a power level corresponding to the RBG, and the reference reference is a power value of a Cell-specific Reference Signal (CRS). For example, the power lifting value corresponding to one RBG may be 2dB, 0dB, -3dB, -6dB or -9dB, where OdB represents the average power value (ie, the amount of transmit power is not adjusted), and 2dB represents an increase relative to the average power value. 2dB, -3dB means a 3dB reduction from the average power value.

The above JSPC algorithm divides the entire bandwidth into a number of RBGs, and separately processes the different RBGs separately. The JSPC algorithm optimizes the power of each cell in turn, and adjusts its power lifting value. When power is optimized for one of the cells, the other cells use the most recently optimized transmit power value, that is, the current transmit power value. .

The base station can also implement the above method 2 in combination with the JSPC algorithm, wherein, when each JSPC period arrives, it executes:

Selecting the current to-be-optimized cell, determining the CBF UE in the current to-be-optimized cell and the coordinated UE in the corresponding coordinated cell by using the CBF method; based on each UE type of the RBG scheduled in the current to-be-optimized cell, based on each power The lifting value is respectively obtained as a corresponding total transmission efficiency value, and the power lifting value corresponding to the maximum transmission efficiency total value is selected as the power optimization value corresponding to the current to-be-optimized cell.

Preferably, in implementation mode 3, the base station may determine the CBF UE and the corresponding coordinated UE in each cell to be optimized by using the CBF method, and after the base station uses the CBF method to distinguish different types of UEs, the base station is completed. For the airspace adjustment of the determined CBF UE and the corresponding coordinated UE, afterwards, the base station can calculate the power lifting value of the RBG scheduled to the normal UE by using the JSPC algorithm.

Based on the same design concept, a cooperative beamforming device designed by the embodiment of the present invention, as shown in FIG. 6, includes:

The obtaining module 601 is configured to obtain, for each resource block group RBG corresponding to the bandwidth of each cell to be optimized, a power optimization value corresponding to each RBG;

The executing module 602 is configured to perform, for each RBG, a coordinated beamforming CBF for the user equipment UE scheduled by the RBG based on the power optimization value corresponding to the RBG.

Preferably, the obtaining module 601 is specifically configured to:

For each RBG, based on the different power lifting values corresponding to the RBG, respectively obtain corresponding total transmission efficiency values, and select a power lifting value corresponding to the maximum transmission efficiency total value as the power optimization value corresponding to the RBG. In an actual application, the foregoing obtaining module 601 is specifically configured to:

According to the type of the UE scheduled on the RBG, the corresponding total transmission efficiency value is respectively obtained based on different power lifting values corresponding to the RBG.

Preferably, the obtaining module 601 is specifically configured to:

For the RBG of the scheduled normal UE, based on the different power lifting values corresponding to the RBG, respectively obtain corresponding total transmission efficiency values, and select a power lifting value corresponding to the maximum total transmission efficiency value, as the power optimization corresponding to the RBG. Value, where the normal UE is a UE other than the determined CBF UE and the coordinated UE.

Further, the obtaining module 601 is specifically configured to:

In actual application, the current transmit power value used by the coordinated cell of the cell to which the RBG belongs refers to: performing power optimization according to the last power optimization value after determining the last power optimization value corresponding to the RBG in the coordinated cell. The value of the transmitted power afterwards.

The above device corresponds to the method flow, and will not be described herein.

In the embodiment of the present invention, for each RBG corresponding to the bandwidth of the cell to be optimized, the power optimization value corresponding to each RBG is obtained, and for each RBG, based on the power optimization value corresponding to the RBG, the RBG scheduling is performed on the RBG. The UE performs the CBF, so as to coordinate the call of the time-frequency resource, implement the time-frequency domain optimization, implement the power domain optimization based on the power optimization value corresponding to the RBG, and On the basis of time-frequency domain and power domain optimization, CBF is implemented to achieve interference coordination in the airspace, so that multi-cell joint resources are efficiently allocated. UEs in multiple cells can avoid in time-frequency domain, power domain and airspace. Interference between each other maximizes the quality of service of the edge UE.

The present invention is 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 device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. 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 the 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 Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and modifications The spirit and scope of the embodiments of the present invention. Thus, it is intended that the present invention cover the modifications and the modifications of the embodiments of the invention.

Claims

claims

1. A cooperative beamforming method, characterized by including:

For several resource block groups RBG corresponding to the bandwidth of each cell to be optimized, obtain the power optimization value corresponding to each RBG;

For each RBG, based on the power optimization value corresponding to the RBG, perform cooperative beamforming CBF on the user equipment UE scheduled in the RBG.

2. The method according to claim 1, characterized in that, obtaining the power optimization value corresponding to each RBG specifically includes:

For each RBG, based on the different power rise and fall values corresponding to the RBG, the corresponding total transmission efficiency value is obtained, and the power rise and fall value corresponding to the largest total transmission efficiency value is selected as the power optimization value corresponding to the RBG.

3. The method of claim 2, characterized in that, based on the different power rise and fall values corresponding to the RBG, the corresponding total transmission efficiency value is obtained respectively, specifically including:

According to the type of UE scheduled on the RBG and based on different power increase and decrease values corresponding to the RBG, the corresponding total transmission efficiency value is obtained respectively.

4. The method according to claim 1, characterized in that, obtaining the power optimization value corresponding to each RBG specifically includes:

Determine the CBF UEs and cooperative UEs in the several cells to be optimized;

For the RBG scheduled to the determined CBF UE or cooperative UE, the preset power increase and decrease value is used as the power optimization value corresponding to the RBG, wherein the preset power increase and decrease value is designated by one of the different power increase and decrease values corresponding to the RBG. power rise and fall value; or,

For the RBG of the scheduled ordinary UE, based on the different power increase and decrease values corresponding to the RBG, the corresponding total transmission efficiency value is obtained respectively, and the power increase and decrease value corresponding to the largest total transmission efficiency value is selected as the power optimization corresponding to the RBG. value, where ordinary UEs are UEs other than determined CBF UEs and coordinated UEs.

5. The method according to any one of claims 2 to 4, characterized in that based on the RBG corresponding For each power increase or decrease value, the corresponding total transmission efficiency value is obtained respectively, including:

Determine the maximum transmission efficiency of the UE in the cell to which the RBG belongs when the power increase and decrease value is used in the cell to which the RBG belongs; and

Determine the maximum transmission efficiency of the UE in the coordinated cell when the coordinated cell of the cell to which the RBG belongs uses the current transmit power value;

The sum of the maximum transmission efficiency value of the UE in the cell to which the RBG belongs and the maximum transmission efficiency value of the UE in the corresponding coordinated cell is used as the total transmission efficiency value obtained by the RBG based on the power increase and decrease value.

6. The method as claimed in claim 5, characterized in that the current transmit power value used by the coordinated cell of the cell to which the RBG belongs refers to: after determining the last power optimization value corresponding to the RBG in the coordinated cell, according to The last power optimization value is the transmission power value after power optimization.

7. A cooperative beamforming device, characterized by including:

The acquisition module is used to obtain the power optimization value corresponding to each RBG for several resource block groups RBG corresponding to the bandwidth of each cell to be optimized;

The execution module is configured to perform collaborative beamforming CBF on the user equipment UE scheduled in the RBG based on the power optimization value corresponding to the RBG for each RBG.

8. The device according to claim 7, wherein the acquisition module is specifically configured to: for each RBG, obtain the corresponding total transmission efficiency value based on the different power rise and fall values corresponding to the RBG, and obtain the corresponding total transmission efficiency value therefrom. Select the power increase and decrease value corresponding to the maximum total transmission efficiency value as the power optimization value corresponding to the RBG.

9. The device according to claim 8, characterized in that the acquisition module is specifically configured to: according to the type of UE scheduled on the RBG, based on different power increase and decrease values corresponding to the RBG, respectively obtain the corresponding Total transmission efficiency.

10. The device according to claim 7, wherein the acquisition module is specifically configured to: determine the CBF UEs and cooperative UEs in the several cells to be optimized; for scheduling to the determined

The CBF UE or the RBG of the cooperating UE uses the preset power increase and decrease value as the power optimization value corresponding to the RBG, where the preset power increase and decrease value is a specified power of one of the different power increase and decrease values corresponding to the RBG. rate increase and decrease value; or, for the RBG of the scheduled ordinary UE, based on the different power increase and decrease values corresponding to the RBG, the corresponding total transmission efficiency value is obtained respectively, and the power increase and decrease value corresponding to the largest total transmission efficiency value is selected, as The power optimization value corresponding to the RBG, where the ordinary UE is a UE other than the determined CBF UE and coordinated UE.

11. The device according to any one of claims 8-10, characterized in that the acquisition module is specifically used for:

It is determined that when the cell to which the RBG belongs uses the power increase and decrease value, the maximum transmission efficiency of the UE in the cell to which the RBG belongs; and it is determined that when the cooperating cell of the cell to which the RBG belongs uses the current transmit power value, the transmission efficiency of the UE in the cooperating cell is The maximum transmission efficiency value; The sum of the maximum transmission efficiency value of the UE in the cell to which the RBG belongs and the maximum transmission efficiency value of the UE in the corresponding coordinated cell is the total transmission efficiency value obtained by the RBG based on the power increase and decrease value.

12. The device according to claim 11, wherein the current transmit power value used by the coordinated cell of the cell to which the RBG is determined by the acquisition module refers to: the last power corresponding to the RBG in the coordinated cell. After optimizing the value, execute the power-optimized transmit power value based on the last power optimization value.