WO2018187973A1 - 调度用户的确定方法、装置及系统 - Google Patents

调度用户的确定方法、装置及系统 Download PDF

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WO2018187973A1
WO2018187973A1 PCT/CN2017/080257 CN2017080257W WO2018187973A1 WO 2018187973 A1 WO2018187973 A1 WO 2018187973A1 CN 2017080257 W CN2017080257 W CN 2017080257W WO 2018187973 A1 WO2018187973 A1 WO 2018187973A1
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user
cell
moment
base station
neighboring
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PCT/CN2017/080257
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English (en)
French (fr)
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钱锋
万莉
楼群芳
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华为技术有限公司
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Priority to PCT/CN2017/080257 priority Critical patent/WO2018187973A1/zh
Priority to EP17905555.3A priority patent/EP3606262B1/en
Priority to CN201780087243.5A priority patent/CN110337834B/zh
Publication of WO2018187973A1 publication Critical patent/WO2018187973A1/zh
Priority to US16/591,705 priority patent/US11101947B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0042—Arrangements for allocating sub-channels of the transmission path intra-user or intra-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0075—Allocation using proportional fairness
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/04—Scheduled access

Definitions

  • the present application relates to the field of communications, and in particular, to a method, device, and system for determining a scheduling user.
  • Beamforming is a beamforming method that uses channel information to weight a transmitted signal to form a beam.
  • the terminal and the receiving end respectively use a plurality of transmitting antennas and a plurality of receiving antennas, so that the signals are transmitted through the plurality of antennas at the transmitting end and the receiving end.
  • the downlink (English: Downlink, DL for short) coordinated multi-point transmission (English: Coordinated Multi-Point, referred to as CoMP) function is introduced, which aims to improve high-speed signal transmission coverage and cell edge rate through inter-cell cooperation. And the average system rate.
  • the current DL CoMP technology provides a technology of Coordinated Beamforming (CBF), which can coordinate the beamforming directions of each cell to reduce mutual interference and obtain system benefits.
  • CBF Coordinated Beamforming
  • the cell A and the cell B each serve one user equipment (English: User Equipment, abbreviated as UE) (the user), and the cell A downlink signal has a large interference to the user in the cell B
  • Interference avoidance can be achieved by coordinating the weight of the transmitted signal of cell A.
  • the actual transmission time is estimated to be the target scheduling user, and the weight of the target scheduling user.
  • the transmission weights of the cell A and the cell B are acquired, according to the cell A and the cell.
  • the transmission weight of B adjusts the weight of the target scheduling user at the actual transmission time, and then transmits data to the target scheduling user according to the adjusted weight at the actual transmission time.
  • the existing Long Term Evolution (LTE) system usually includes two network architectures, a centralized network architecture and a distributed network architecture, where the signal transmission between the inter-station neighbors of the centralized network architecture is used.
  • the delay is much smaller than the signal transmission delay of the inter-station neighboring area of the distributed network architecture.
  • each cell in order to implement interference avoidance, each cell needs to know the scheduling information of the neighboring cell and the related information of the channel of the base station to the user in the neighboring cell to perform corresponding weight adjustment, and in the current distributed network architecture,
  • the signal transmission delay in the inter-station neighboring area is large, and the interference avoidance has higher requirements on real-time performance. It is easy to appear that the transmission weight is invalid for the target scheduling user in the actual scheduling time. Therefore, under the distributed network architecture, currently The reliability of interference avoidance is poor.
  • the present application provides a method, a device and a system for determining a scheduling user.
  • the technical solution is as follows:
  • a method for determining a scheduling user is provided, which is applied to a first base station of a data transmission system, the first base station includes at least two antennas, and the first base station manages a first cell, and the method includes:
  • the first pre-scheduled user at the second moment is determined in the user of the first cell.
  • the method for determining a scheduling user after determining, by the first base station, the first pre-scheduled user at the second time in the user of the first cell, the first base station ensures that the first cell and its associated neighboring area are not adjusted. Calculating the SINR of each user in the first cell at the second moment according to the first transmission weight and the second transmission weight, and according to the SINR of each user at the second moment, at the first The user of the cell selects the target scheduling user at the second moment.
  • the SINR is calculated according to the transmission weight of the first cell and its associated neighboring cell, it is more accurate than the calculated SINR according to the CQI, so it may be more
  • the target scheduling user that most closely matches the transmission weight at the second moment is accurately determined, avoiding the situation that the transmission weight is invalid during the actual scheduling, and improving the reliability of the interference avoidance.
  • the data transmission system is a Time Division Duplexing (TDD) system or a Frequency Division Duplexing (FDD) system
  • TDD Time Division Duplexing
  • FDD Frequency Division Duplexing
  • the data transmission system is a TDD system
  • the time-to-noise ratio SINR of the message includes:
  • the first user k is any user of the first cell at the second moment
  • SINR k,l is the SINR of the first stream of the first user k at the second moment
  • H i,k is the first base station.
  • the y is a target neighboring area of the first user k
  • the target neighboring area is a neighboring area measurable by the first user k in the second cell
  • H y,k is the channel of the target neighboring area y to the first user k
  • the noise is the self-noise noise of the first user
  • the Y is the second cell
  • w y, f is the transmission weight of the f-stream of the target neighboring zone y at the second moment
  • Fy is the target neighboring zone y The total number of streams transmitted at the second moment.
  • the SINR of any user in the cell is positively correlated with the product of its channel and the transmission weight, and is negatively related to the product of the channel and the transmission weight of the neighboring cell that can be measured.
  • the SINR calculated by the first signal to noise ratio calculation formula is more accurate than the SINR determined according to the CQI reported by the user.
  • the data transmission system is a frequency division duplex FDD system
  • the calculating, according to the first transmission weight and the second transmission weight, each user in the first cell is The signal to interference and noise ratio SINR of the second moment includes:
  • the first user k is any user of the first cell at the second time
  • the SINR k, l is the SINR of the first stream of the first user k at the second time
  • the RSRP k, i is in the At a second time
  • H represents a conjugate transpose of a matrix, where y is a target neighboring area of the first user k, The target neighboring area is one of the neighboring areas measurable by the first user k in the second cell, and the RSRP k, y is the target measured by the first user k at the second moment.
  • the Y is the total number of neighboring cells measurable by the first user k in the second cell
  • Fy is the target neighboring zone y in the first
  • the total number of transmission streams at two moments, w y, f is the transmission weight of the f-stream of the target neighboring region y at the second moment
  • w k, y is used to characterize the target neighboring region y to the
  • the channel of the first user k the dimension of the w k, y is the same as the dimension of the w y, f , and is measured by the first user k according to the number of streams of the first user k and is reported to Precoding moment of the first base station
  • the number of rows and columns of the array is characterized by PMI;
  • the w k, SU, l is equal to the w k, CBF, l , And indicating a transmission weight of the first stream of the first user k at the second moment.
  • the dimension of the above w k,y may be characterized by the number of rows and columns of the precoding matrix corresponding to the PMI of the first base station, which is measured by the first user k according to the number of streams of the first user k.
  • the SINR of any user in the cell is positively correlated with the product of its channel and the transmission weight, and is also positively related to its RSRP, which is negatively related to the channel and its neighbors.
  • the product of the transmission weight is also negatively correlated with the RSRP of the neighboring cell that can be measured.
  • the SINR calculated by the first signal to noise ratio calculation formula is more accurate than the SINR determined according to the CQI reported by the user.
  • the method further includes:
  • Obtaining a user measurement set of the first pre-scheduled user where the user measurement set of the first pre-scheduled user is used to record an interference source neighboring cell that interferes with the first pre-scheduled user, and an RSRP of the interference source neighboring cell The degree of interference to the first pre-scheduled user;
  • the pre-scheduling information includes: a user measurement set of the third pre-scheduled user, where the third pre-scheduling user is the third base station at the first moment Determining the pre-scheduled user at the second moment, the user measurement set of the third pre-scheduled user is used to record an interference source neighboring region that interferes with the third pre-scheduled user, and an RSRP pair of the neighboring region of the interference source
  • the third pre-scheduled user interference degree the third cell a cell in the neighboring cell of the first cell that is interfered by the first cell or all neighboring cells of the first cell;
  • the process of obtaining the user measurement set of the first pre-scheduled user may include the process of determining whether the first pre-scheduled user is a CBF candidate user, as follows:
  • the first base station acquires the RSRP total ⁇ RSRP g of all neighboring cells of the first pre-scheduled user received by the first pre-scheduled user, and g is the total number of neighboring cells of the first pre-scheduled user; the first base station determines the interference sum of the first pre-scheduled user.
  • the sum of the interferences is equal to the sum of the ⁇ RSRP g and the self-noise noise of the first pre-scheduled user; the first base station sorts the RSRPs of all the neighboring areas of the first pre-scheduled user in descending order (that is, sorted from high to low) The first base station determines whether the first pre-scheduled user is a CBF candidate user according to the RSRP of all the neighboring cells that are sorted.
  • the process of determining, by the first base station, whether the first pre-scheduled user is a CBF candidate user according to the RSRP of all the neighboring cells in the sequence includes:
  • step D if 1 ⁇ i ⁇ n, obtain the sum of the first i RSRP after sorting, n is a preset threshold of detection times, and perform step D;
  • step D determining whether the ratio of the sum of the first RSRPs and the interference sum is greater than a preset interference noise ratio value, performing step E or F;
  • the ratio of the sum of the current i RSRPs to the sum of the interferences is greater than a preset interference noise ratio, and determining that the first pre-scheduled user is a CBF candidate user;
  • the first base station may also establish a user measurement set of the first pre-scheduled user for the first pre-scheduled user, and the first base station may record the user pre-scheduled user in the user measurement set. Whether the first pre-scheduled user is a CBF candidate user.
  • the second cell is an associated neighboring cell of the first cell, and includes a neighboring cell that meets a preset interaction condition in a neighboring cell of the first cell, where the preset interaction condition is defined according to a specific transmission scenario.
  • the neighboring cell that meets the preset interaction condition in the neighboring cell of the first cell may be the base station to which the first base station sends the user measurement set within the preset time period, that is, the second cell includes the preset time length.
  • the preset duration is greater than or equal to the interval between the first moment and the second moment.
  • the preset duration may be 8 time slots.
  • the first base station receives the transmission weight sent by the base station of the user measurement set of the first pre-scheduled user, that is, the first or the current first determined by the first base station.
  • the base station to which the source interferes with the scheduling user to generate interference will feed back the transmission weight of the second base station to the first base station.
  • the first base station may send the first transmission weight to the base station to which the associated neighboring cell belongs, and the base station to which the associated neighboring cell belongs is the preset time length to the first base station.
  • the first transmitting right is sent to the base station to which the associated neighboring cell belongs.
  • the value, the first transmission weight is the weight of the CBF weight adjustment.
  • the first transmitting weight is sent to the base station to which the associated neighboring cell belongs, and the first transmitting weight is a weight that is not adjusted by the CBF weight.
  • the neighboring cell in the neighboring cell of the first cell that meets the preset interaction condition may be all neighboring cells of the first cell, that is, the second cell includes all neighboring cells of the first cell.
  • the first base station receives the transmission weights sent by the base stations to which all the neighboring cells belong, that is, the base stations of the neighboring cells of the first base station feed back the first base station to the second time. Launch weight.
  • the first base station may send the first transmission weight to the base station of all neighboring cells of the first cell, because the second cell in this scenario For all neighboring cells of the first cell, the first base station may send the first transmission weight to the second base station.
  • the first transmitting weight is sent to the second base station, and the first transmitting weight is a weight that is not adjusted by the CBF weight.
  • the first transmitting weight is sent to the second base station, and the first transmitting weight is the adjusted weight of the CBF weight.
  • the filtering according to the SINR of the second time in time, the target scheduling user of the second time in the user of the first cell, including:
  • the target scheduling user of the second moment is screened in the first cell by using a proportional fairness principle.
  • the principle of proportional fairness can be used to ensure that the user who has the highest transmission priority and the highest priority is selected as the target scheduling user at the second moment without guaranteeing the transmission weight of the first cell and its associated neighboring cell, thereby avoiding the actual scheduling.
  • the transmission weight is invalid, the reliability of interference avoidance is improved.
  • the pre-scheduling information further includes: channel state information CSI of the third pre-scheduled user, where the determining the first transmission weight of the first cell includes:
  • the n is the most severe first n users that are interfered by the first cell, where n is a threshold number of users that the first cell can coordinate;
  • Determining the first of the first cell by using a feature vector zero-forcing EZF, a regularized feature vector zero-forcing REZF, or a maximized signal leakage noise ratio SLNR according to the CSI of the first pre-scheduled user and the CSI of the CBF cooperative user Launch weight.
  • a determining apparatus for a scheduling user is provided, which is applied to a first base station of a data transmission system, the first base station includes at least two antennas, and the first base station manages a first cell, and the apparatus includes: A module for performing the determining method of the scheduling user provided by the above first aspect.
  • a determining device for a user comprising: a processor, a transmitter and a receiver, and the processor is configured to implement the method for determining a scheduled user provided by the first aspect.
  • a computer readable storage medium having stored therein instructions for causing a computer to perform the scheduling provided by the first aspect described above when the computer readable storage medium is run on a computer User's determination method.
  • a computer program product comprising instructions for causing a computer to perform the method of determining a scheduled user provided by the first aspect above is provided when the computer program product is run on a computer.
  • a sixth aspect provides a data transmission system, including: at least two base stations, where the at least two base stations include the first base station, and the first base station includes the scheduling user according to the second aspect or the third aspect Determination device.
  • the first base station after determining, by the first cell, the first pre-scheduled user at the second time, the first base station ensures that the transmission of the first cell and its associated neighboring area is not adjusted. Under the premise of the weight, the user who meets the highest transmission priority and the highest priority is found as the target scheduling user at the second moment, avoiding the situation that the transmission weight is invalid during the actual scheduling, and improving the reliability of the interference avoidance.
  • the neighboring area may refer to an inter-station neighboring area, or may be an intra-station neighboring area, especially in a scenario where the inter-station neighboring area has a long interaction delay. Effectively avoid the failure of the transmission weight when the actual scheduling.
  • the embodiment of the present invention adopts two scheduling modes, so that the data transmission system can perform overall coordinated interference management, and the scheduling process and the cooperation are combined to overcome the shortcomings of the previous scheduling and coordination.
  • 1-1 is a schematic diagram of a CBF principle involved in a method for determining a scheduling user according to an embodiment of the present invention
  • 1-2 is a schematic diagram of a centralized network architecture according to an embodiment of the present invention.
  • FIG. 1-3 are schematic diagrams of a distributed network architecture according to an embodiment of the present invention.
  • 1-4 are schematic diagrams of a failure of a transmission weight according to an embodiment of the present invention.
  • 2-1 is a schematic flowchart of a method for determining a scheduling user according to an embodiment of the present invention
  • 2-2 is a schematic flowchart of determining whether a first pre-scheduled user is a CBF to be adjusted user according to an embodiment of the present disclosure
  • FIG. 2-3 is a schematic flowchart of filtering a target scheduling user at a second moment in a user of a first cell according to an SINR of each user at a second moment according to an embodiment of the present disclosure
  • FIGS. 2-4 are schematic flowcharts of another method for determining a scheduling user according to an embodiment of the present invention.
  • 3-1 is a schematic structural diagram of a device for determining a scheduling user according to an embodiment of the present invention
  • 3-2 is a schematic structural diagram of another apparatus for determining a scheduling user according to an embodiment of the present invention.
  • 3-3 is a schematic structural diagram of still another apparatus for determining a scheduling user according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of still another apparatus for determining a scheduling user according to an embodiment of the present invention.
  • FIG. 1-1 is a schematic diagram of a CBF principle involved in a method for determining a scheduling user according to an embodiment of the present invention.
  • the left and right sides of FIG. 1-1 are respectively used by the CBF before and after execution of the CBF.
  • a schematic diagram of the downlink signal transmission of the data transmission system involved in the method is as shown in FIG. 1-1. It is assumed that the data transmission system includes two cells, and the two cells are cell A and cell B, as shown in FIG. 1-1. As shown in the figure, it is assumed that two cells serve one user on the same time-frequency resource, wherein cell A serves the first user 01, and the corresponding weight vector is The cell B serves the second user 02, and the corresponding weight vector is ⁇ 2 .
  • the direction of the downlink signal sent by the cell A to the first user 01 is aligned with the second user 02, so the downlink is performed.
  • the signal has a large interference to the second user 02 in the cell B.
  • the cell A serves the first user 01, and the corresponding weight vector is adjusted to
  • the cell B serves the second user 02, and the corresponding weight vector is unchanged, and is still ⁇ 2 .
  • the weight vector is adjusted accordingly, because the cell A has a downlink signal for the first user 01.
  • the transmission direction deviates from the second user 02 before the adjustment, and therefore, the signal interference is weakened.
  • the above data transmission system includes two network architectures, which are centralized network architectures as shown in FIG. 1-2 (That is, the centralized deployment of the BBU and the distributed network architecture shown in Figure 1-3 (that is, the distributed deployment of the BBU).
  • the centralized network architecture includes multiple radio remote units ( English: Remote Radio Unit (RRU) and BBU.
  • RRU Remote Radio Unit
  • Each RRU constitutes a cell, and multiple RRUs are in different geographical locations, and they are connected to their respective BBUs through connection components such as optical fibers, but the BBUs are in the same geographical location.
  • BBU0 to BBU3 there are four BBUs, which are BBU0 to BBU3, and the RRUs are seven, which are RRU0 to RRU6.
  • the BBU0 to BBU3 are deployed in a centralized manner, and the RRU0 to RRU6 are deployed in a distributed manner.
  • the RRU2 to RRU4 are deployed in close proximity.
  • the three can also be regarded as a centralized deployment.
  • BBU0 is connected to RRU0
  • BBU1 is connected to RRU1
  • BBU2 is connected to RRU2 to RRU4
  • BBU3 is connected to RRU5 and RRU6 respectively. Because the BBUs are deployed in a centralized manner, the transmission distance between the BBUs is short.
  • the interaction between the BBUs is ideal for synchronization, interaction delay, and interaction bandwidth.
  • the network architecture of FIG. 1-2 is only a schematic description, and the specific architecture of the centralized network architecture is not limited in the embodiment of the present invention.
  • the distributed network architecture includes multiple RRUs and BBUs.
  • Each RRU constitutes a cell, and multiple RRUs are in different geographical locations, and RRUs and BBUs belonging to the same cell are deployed nearby, and BBUs in different cells are in different geographical locations, and signals are transmitted through the backbone network.
  • Figure 1-3 assumes that there are a total of n+1 BBUs, n ⁇ 0, which are BBU0 to BBU n, respectively.
  • the RRUs are n+1, which are RRU0 to RRU n respectively, where n+1 BBUs are deployed in a distributed manner, n+1
  • the BBUs are connected to the n+1 RRUs one by one.
  • the network architecture of FIG. 1-3 is only a schematic description, and the specific architecture of the distributed network architecture is not limited in the embodiment of the present invention.
  • each cell needs to know the scheduling information of the neighboring cell and the related information of the channel of the base station to the user in the neighboring cell to perform corresponding weight adjustment.
  • the cell A can know the scheduling result of the cell B (the neighboring cell of the cell A) in the first subframe and the channel state of the cell B in the first subframe.
  • Information (English: Channel State Information, referred to as: CSI) information.
  • the CBF needs to be implemented in a centralized network system.
  • the BBUs of all cells need to be in the same geographical location to ensure a very good backhaul delay and bandwidth between the BBUs.
  • the pre-scheduling method is usually used to inform the serving cell of the scheduling information of the neighboring cell at a certain moment in the future, that is, to perform scheduling at a certain moment in the future. Estimates, but this pre-scheduling approach is generally less accurate under a distributed network architecture.
  • the scheduling of the real transmission time of each cell is likely to change, so that the previously designed transmission weight is invalid.
  • the data transmission system includes three cells, namely, cell 0, cell 1, and cell 2.
  • cell 0 it is assumed that the pre-scheduling mode is used in the data transmission system in the pre-scheduling time.
  • the three users are UE_A, UE_B and UE_C respectively.
  • cell 0 may occur at the real transmission time (the real transmission time is a time after the pre-scheduling time).
  • the real-time transmission time is actually UE_A, and the three users, UE_B and UE_D, perform data transmission, where the neighboring cell of cell 0: the user in cell 2 is changed from UE_C to UE_D.
  • the transmission weights obtained by UE_A and UE_C are invalid for UE_D; service user changes may also occur.
  • the real transmission time is actually UE_E, and the three users UE_B and UE_D perform data transmission, where the neighboring cell of cell 0: cell
  • the user in 2 changes from UE_C to UE_D
  • the serving user of cell 0 changes from UE_A to UE_E.
  • the transmission weight acquired for UE_A is invalid for UE_E.
  • the reason for this phenomenon is mainly due to the fact that the current scheduling scheme only pursues the principle of proportional fairness (PF) in the cell, regardless of the cooperation between cells. As a result, it is easy to appear that the transmission weight is invalid at the actual scheduling time. Therefore, under the distributed network architecture, the reliability of the current interference avoidance is poor.
  • PF proportional fairness
  • the embodiment of the present invention provides a method for determining a scheduling user, which is applied to a first base station of a data transmission system, where the first base station includes at least two antennas, and the first base station manages a first cell, the cell Refer to the cell A shown in Figure 1-1 above. As shown in Figure 2-1, the method includes:
  • Step 201 At the first moment, the first base station determines the first pre-scheduled user at the second moment in the user of the first cell, and the second moment is after the first moment.
  • the second scheduling moment and the first scheduling moment may be preset according to a specific network architecture of the data transmission system, for example, the two are separated by at least 4 slots, or at least 8 slots are separated.
  • the PF algorithm may be used to determine the first pre-scheduled user at the second moment in the user of the first cell.
  • the PF algorithm can be used for the largest proportion of fair acquisition (English: Max PF Gain) algorithm.
  • the principle of the Max PF Gain algorithm is as follows: the first cell acquires the user with the largest ratio of the scheduled instantaneous channel quality and the historical average channel quality, wherein the instantaneous channel quality can be reflected by the spectrum efficiency of the spectrum resource to be scheduled by the user at the second moment.
  • the historical average channel quality may be reflected by the total amount of data transmission of the user before the previous moment of the second moment.
  • the unit of the total amount of data transmission is usually a bit (English: bit), and the user is in the previous moment at the second moment.
  • the total amount of data transmission before the moment is also the total number of bits transmitted by the user before the previous moment of the second moment.
  • the first pre-scheduled user may be determined according to the PF formula, and the first pre-scheduled user p that satisfies the PF principle may satisfy the following PF formula:
  • E k (f) is the spectral efficiency of the spectrum resource to be scheduled by user k on subframe f, 1 ⁇ k ⁇ K, where K is the total number of users in the cell, and T k (f) is the user k is in the child
  • the total amount of data transmission in the frame before the frame f and the subframe f Indicates the maximum value from user 1 to user K.
  • the process of obtaining the E k (f) of the user k includes: calculating a corresponding modulation and coding scheme according to a channel quality indicator (CQI) of the user f in the subframe f. (English: Channel State Information, referred to as MCS), and then determine the spectral efficiency E k (f) according to the MCS, wherein the CQI is measured by the user k and reported to the first base station.
  • CQI channel quality indicator
  • the process of acquiring the T k (f-1) of the user k includes: calculating a historical average channel quality T k (f-1) of the user k according to a historical average channel quality calculation formula, where the historical average channel quality calculation formula is :
  • q is the scheduled user of the f-1th subframe
  • k ⁇ q refers to the user k is not in the f-1th subframe.
  • the user is scheduled
  • ⁇ is the preset filter coefficient, (0 ⁇ ⁇ ⁇ 1).
  • B k (f-1) is the transport block size of the user k in the subframe f-1 (English: Transportblock size, referred to as TBS), that is, each resource block (English: resource block; RB for short) of the MCS Corresponding to the number of transmitted bits.
  • the historical average channel quality calculation formula substantially replaces f of the following formula with f-1, and the meaning of each parameter in the formula may refer to the above historical average channel quality calculation formula.
  • the historical average channel quality may be a preset initial value, that is, T k (1) is an initial value, and the initial value may be sent by the upper layer of the base station.
  • Step 202 The first base station determines whether the first pre-scheduled user is a CBF to be adjusted user. When the first pre-scheduled user is the CBF to be adjusted user, step 203 is performed, and when the first pre-scheduled user is not the CBF to be adjusted user, step 204 is performed.
  • the first cell it is required to determine in advance whether the first cell needs to perform CBF weight adjustment at the second time.
  • the CBF of the first cell needs to be performed.
  • Weight adjustment when the downlink signal of the first cell does not affect the neighboring cell at the second moment, the CBF weight adjustment of the first cell is not required.
  • the so-called neighboring cells in the embodiments of the present invention may include intra-station neighboring cells and/or inter-station neighboring cells.
  • the user in the CBF weight adjustment process, according to the relationship between the interference and the interference of the downlink signal of the cell, the user can be divided into at least two types, one is a CBF to be adjusted user, and the other is a CBF cooperative user.
  • the downlink signal of the cell to be adjusted for the CBF is relatively interfered with the downlink signal of the CBF cooperative user, that is, the CBF to be adjusted user is the user in the interfering cell that meets the preset condition, and the CBF cooperative user satisfies another pre-
  • the conditionally disturbed user can reduce the interference to the CBF cooperative user by adjusting the transmission weight of the cell to the CBF to be adjusted.
  • the first user 01 is a CBF to be adjusted user
  • the second user 02 is a CBF collaborative user.
  • each base station detects whether the pre-scheduled user in the cell it manages is a CBF to be adjusted user, and whether the pre-scheduled user in the cell it manages is a CBF cooperative user.
  • a user can be either a CBF to be adjusted user or a CBF cooperative user, that is, the downlink signal for the user interferes with both the downlink signal for one user and the downlink for another user. Signal interference.
  • Step 2021 The first base station acquires a user measurement set of the first pre-scheduled user.
  • the user measurement set of the first pre-scheduled user is used to record the interference source neighboring area that interferes with the first pre-scheduled user, and the degree of interference of the RSRP of the interference source neighboring area with the first pre-scheduled user.
  • the first base station may determine, according to the reference signal receiving power (English: Reference Signal Receiving Power, RSRP) of the first cell to the first pre-scheduled user, whether the first pre-scheduled user is a CBF candidate user.
  • RSRP Reference Signal Receiving Power
  • the user measurement set is established for the first pre-scheduled user.
  • the RSRP is usually measured by the first pre-scheduled user and reported to the first base station.
  • the CBF candidate user is a user who meets certain conditions by the interference degree of other cells, and may become a CBF cooperative user.
  • the process of determining, by the first base station, whether the first pre-scheduled user is a CBF candidate user is as follows:
  • Step 2021a The first base station acquires an RSRP total ⁇ RSRP g of all neighboring cells of the first pre-scheduled user received by the first pre-scheduled user, where g is the total number of neighboring cells of the first pre-scheduled user.
  • Step 2021b The first base station determines a total interference of the first pre-scheduled user, where the sum of the interferences is equal to a sum of the ⁇ RSRP g and the self-noise noise of the first pre-scheduled user.
  • Step 2021c The first base station sorts the RSRPs of all neighboring cells of the first pre-scheduled user in descending order (that is, sorted from high to low).
  • Step 2021d The first base station determines, according to the RSRP of all the neighboring cells that are sorted, whether the first pre-scheduled user is a CBF candidate user.
  • step 2021d specifically includes:
  • n is a preset number of detection times (usually pre-issued by the upper layer of the base station), step D;
  • step D determining whether the ratio of the sum of the first RSRPs and the interference sum is greater than a preset interference noise ratio value, performing step E or F;
  • the ratio of the current sum of the RSRPs to the sum of the interferences is greater than a preset interference-to-noise ratio, determining that the first pre-scheduled user is a CBF candidate user, and ending the action;
  • the first base station acquires the RSRP total ⁇ RSRP 3 of all neighboring cells of the first pre-scheduled user received by the first pre-scheduled user, and determines that the first detection threshold is 2; a sum of interferences of a pre-scheduled user, the sum of the interference being equal to the sum of the ⁇ RSRP 3 and the self-noise noise of the first pre-scheduled user; sorting the RSRPs of the three neighboring areas of the first pre-scheduled user in descending order; and then determining the RSRP 1 Whether formula 1 is satisfied:
  • Threshold is the preset interference noise ratio.
  • RSRP 1 When RSRP 1 satisfies the formula 1, it is determined that the first pre-scheduled user is a CBF candidate user. When RSRP 1 does not satisfy the formula 1, it is determined whether RSRP 1 + RSRP 2 satisfies the formula 2:
  • Threshold is the preset interference noise ratio.
  • the RSRP 1 + RSRP 2 satisfies the formula 2
  • the RSRP 1 + RSRP 2 does not satisfy the formula 2
  • the first base station has performed two detections because the detection number threshold is 2. Therefore, it is not necessary to calculate RSRP 1 +RSRP 2 +RSRP 3 again , and it can be determined that the first pre-scheduled user is not a CBF candidate user.
  • a user measurement set is established for the first pre-scheduled user.
  • the first base station establishes a user measurement set for the first pre-scheduled user, and the user measurement set of the first pre-scheduled user is used to record the interference first.
  • the degree of interference can be reflected by the proportion of the neighboring region d of the above interference source, specifically: This ratio can also be referred to as the interference ratio.
  • the user measurement set of the first pre-scheduled user is as shown in Table 1, and the cell number of the first cell is If the ID of the first pre-scheduled user is 3, the primary interfering cell is the cell 3, the RSRP of the primary interfering cell is 40%, and the RSRP of the secondary interfering cell is 30%.
  • the interference of the neighboring areas, the two neighboring areas are the cell 3 with the interference proportion of 40%, and the cell 2 with the interference proportion of 30%, and the sum of the interference ratios of the two is greater than the interference noise ratio of 70%.
  • Cell number UE identification Primary interfering cell Secondary interference cell 1 3 Cell3, 40% Cell2, 30%
  • the first base station may also establish a user measurement set of the first pre-scheduled user for the first pre-scheduled user, whether the first pre-scheduled user is a CBF candidate user, and the first base station may record the user measurement set in the user
  • the first pre-scheduled user is a CBF candidate user.
  • the user measurement set of the first pre-scheduled user is as shown in Table 2.
  • the table records that the UE3 is a CBF candidate user, and other contents can refer to Table 1.
  • the pre-scheduled user listed in the table 1 may be the CBF candidate user by default, and it is not necessary to add whether the pre-scheduling user is a CBF candidate user.
  • the project reduces the content of the user measurement set and correspondingly simplifies the content of the information of subsequent inter-cell interactions.
  • Step 2022 The first base station receives pre-scheduling information sent by the third base station to which the third cell belongs, where the pre-scheduling information includes: a user measurement set of the third pre-scheduled user.
  • the third pre-scheduled user is a pre-scheduled user at a second moment determined by the third base station at the first moment, and the user measurement set of the third pre-scheduled user is used to record an interference source neighboring region that interferes with the third pre-scheduled user. And the degree of interference of the RSRP of the neighboring area of the interference source with the third pre-scheduled user.
  • the third cell is a cell in the neighboring cell of the first cell that is interfered by the first cell or all neighboring cells of the first cell.
  • each base station in the data transmission system performs pre-scheduling of users in the cell managed by itself, and therefore, the third cell is used as a neighboring cell of the first cell, and the corresponding base station also performs pre-scheduling, that is, At the first moment, the third base station determines the third pre-scheduled user at the second moment in the user of the third cell.
  • the third base station determines the third pre-scheduled user at the second moment in the user of the third cell.
  • the user measurement set of the third pre-scheduled user may be obtained.
  • the obtaining process of the user measurement set may refer to the foregoing step 2021, which is not limited by the embodiment of the present invention.
  • the interfered cell transmits the user measurement set of its pre-scheduled user to the interference source cell.
  • the interfered cell The pre-scheduled user is also the above-mentioned CBF candidate user, and the other case is that any two neighboring areas perform the interaction of the user measurement set.
  • the foregoing third cell may be a type of cell, and the third cell may be a cell that is interfered by the first cell in the neighboring cell of the first cell, or may be all neighboring cells of the first cell.
  • the third base station After acquiring the user measurement set of the third pre-scheduled user, the third base station sends the user measurement set of the third pre-scheduled user to the first base station, so that the first base station according to the user measurement set of the first pre-scheduled user and the first The user measurement set of the three pre-scheduled users determines whether the third pre-scheduled user is a CBF to be adjusted user.
  • the base station to which the cell 3 belongs and the base station to which the cell 5 belongs are the third base station.
  • the user measurement set of the third pre-scheduled user sent by the third base station may refer to Table 3 and Table 4, respectively.
  • Cell number UE identification Primary interfering cell Secondary interference cell 3 19 Cell1, 63% Cell7, 26%
  • the first base station may send the user measurement set of the first pre-scheduled user by using pre-scheduling information.
  • the first base station may also send the user measurement set of the first pre-scheduled user to the interference of the first pre-scheduled user by using pre-scheduling information.
  • the base station to which the source cell belongs for example, refer to Table 1.
  • the interference neighboring area of the first pre-scheduled user is the cell 2 and the cell 3.
  • the first base station sends the user measurement set of the first pre-scheduled user to the cell 2 and the cell 3 Base station.
  • the third base station which is not described in detail in the embodiment of the present invention.
  • Step 2023 The first base station according to the user measurement set of the first pre-scheduled user and the user measurement of the third pre-scheduled user Set, determine whether the first pre-scheduled user is a CBF to be adjusted user.
  • the first base station may establish an overall user measurement set according to the user measurement set of the first pre-scheduled user and the user measurement set of the third pre-scheduled user, where the overall user measurement set is used to record the interference target pre-scheduled user.
  • the interference source neighboring area, and the degree of interference of the RSRP of the interference source neighboring area to the target pre-scheduled user may establish an overall user measurement set according to the user measurement set of the first pre-scheduled user and the user measurement set of the third pre-scheduled user, where the overall user measurement set is used to record the interference target pre-scheduled user.
  • the interference source neighboring area, and the degree of interference of the RSRP of the interference source neighboring area to the target pre-scheduled user.
  • the target pre-scheduled user may be the first cell and all users in the neighboring cell interfered by the first cell.
  • the target pre-scheduled user is also known. It may be the first cell and the users in all neighbors of the first cell.
  • the overall user measurement set can be as shown in Table 5. It should be noted that the content in the remark item in Table 5 is used to explain each user measurement set. In an actual application, the overall user measurement set may not carry the remark item. Further, the overall user measurement set may include an indication pre-scheduling. Whether the user is an item of the CBF candidate user, and correspondingly, the content of each line can refer to Table 2 above. At this time, the first base station can collect the content in the item “pre-scheduled user is a CBF candidate user” according to the overall user measurement.
  • Determining which pre-scheduled users in the cell are CBF candidate users that is, determining which cells are the cells in the neighboring cell of the first cell that are interfered by the first cell.
  • Table 5 in the embodiment of the present invention only uses four neighboring cells in the first cell as an example, that is, Table 5 records the pre-preparations in five cells. Schedule a user's user measurement set.
  • the overall user measurement set can be as shown in Table 6.
  • the content in the remark item in Table 6 is used to explain each user measurement set.
  • the overall user measurement set may not carry the remark item.
  • the overall user measurement set may include an indication pre-
  • the scheduling user is an item of the CBF candidate user.
  • the content of each line can refer to Table 2 above.
  • Table 6 in the embodiment of the present invention is only described by taking the two neighboring cells in the first cell as an example, that is, Table 6 records 3 A user measurement set of pre-scheduled users in the cells.
  • the transmission mode of the user measurement set provided by the second case can reduce the number of transmissions of the user measurement set and reduce the complexity of establishing an overall user measurement set.
  • the transmission method of the user measurement set provided by the second case is usually adopted.
  • the first base station may further determine, according to the foregoing overall user measurement set, that the first pre-scheduled user is a CBF to be adjusted user.
  • the first base station queries, according to the cell number of the first cell, whether the first cell exists as the interference source cell in the entire user measurement set (specifically, the primary interference cell and the secondary interference cell in the foregoing Table 5 or Table 6 can be queried), If the first cell is not the source of the interference, the first pre-scheduled user in the first cell is not the user to be adjusted for the CBF; if the first user is the centralized cell, the first cell is used as the interference source cell. And determining that the first pre-scheduled user in the first cell is a CBF to be adjusted user.
  • the interaction process of the foregoing pre-scheduling information can be implemented through a backhaul line.
  • the backhaul line also known as the backhaul link, refers to the connection from the access network or cell site (English: cells) to the switching center.
  • the switching center is connected to the backbone network, and the backbone network is connected to the core network.
  • the backhaul line is the middle layer of any telecommunications network structure that sits between the access network and the backbone network, providing an important connection between the two networks.
  • Step 203 The first base station determines a first transmit weight that is adjusted by the CBF weight. Go to step 205.
  • the pre-scheduling information sent by the third base station may further include the CSI of the third pre-scheduled user.
  • the CSI may include: a number of rows and columns of a precoding matrix (English: Precoding Matrix Indicator, PMI for short), a CQI, and a number of streams (equal to the rank of the precoding matrix).
  • the process of determining the first transmission weight of the first cell may include:
  • Step X1 When the first pre-scheduled user is a CBF to be adjusted user, the CSI of the CBF cooperative user is obtained from the CSI of the third pre-scheduled user.
  • the first cell needs to perform the second time transmission weight adjustment.
  • the CBF weight adjustment is performed, and the CBF weight adjustment needs to determine the CBF cooperative users of the first cell, and the CBF weight adjustment can be realized through cooperation with the CBF cooperative users.
  • the CBF cooperative user of the first cell is a user that is interfered by the first cell and meets the preset screening condition, and the preset screening condition is that the n0 users with the highest degree of victim interference are determined, that is, the CBF cooperative user determines for the first base station.
  • the most pre-n0 users of the third pre-scheduled user are interfered by the first cell, and the n0 is the threshold of the number of users that can be coordinated by the first cell.
  • n0 n1-n2
  • the n1 is the first
  • the cooperative user threshold n1 of the cell is equal to the number of transmit antennas of the first cell
  • n2 is the number of flows served by the first cell at the second time, which is equal to the number of receive antennas of the first pre-scheduled user.
  • the first base station may determine the CBF cooperative user of the first cell.
  • the process of determining the CBF cooperative user of the first cell includes: selecting the degree of interference in the overall user measurement set according to the cooperative user threshold n1 of the first cell and the number n2 of services served by the first cell at the second time.
  • the highest n1-n2 users are the CBF cooperative users of the first cell, and the interference level is positively correlated with the interference ratio, that is, the higher the interference ratio of the first cell to the interfered user, the victim of the victim user. The higher the degree.
  • the interference of the first cell to the interfered user is the highest according to Table 5 or Table 6.
  • the first three users to be scheduled are used as the CBF cooperative users of the first cell, that is, the first base station can only adjust the downlink signal transmission weights for the second time for the three CBF cooperative users, so as to reduce the downlink signals to the three The impact of CBF collaboration users.
  • the interfered user of the first cell is determined as the CBF cooperative user of the first cell.
  • the interfered users of the first cell ie, cell 1
  • the interfered users of the first cell are user 19 (cell 1 has a corresponding interference ratio of 63%) and user 39 (cell 1 has corresponding interference).
  • the pre-scheduled users 19 and 39 are used as CBF collaborative users.
  • the first base station m may also establish a CoMP cooperative user set U m , where the U m includes a pre-scheduling user of the first cell and a CBF cooperative user of the first cell.
  • the CBF collaborative user of the first cell is N 2 is the number of CBF cooperative users of the first cell, then Set for CoMP collaboration users.
  • Step X2 According to the CSI of the first pre-scheduled user and the CSI of the CBF cooperative user, the feature vector is forced to zero (English: Eigenvector Zero Forcing, EZF for short), and the regularized Eigenvector Zero Forcing (English: Regularized Eigenvector Zero Forcing, for short) : REZF) or the Signal to Leakage plus Noise Ratio (SLNR) determines the first transmission weight of the first cell.
  • EZF Eigenvector Zero Forcing
  • REZF Regularized Eigenvector Zero Forcing
  • SLNR Signal to Leakage plus Noise Ratio
  • CBF weight adjustment algorithms are EZF, REZF, SLNR, etc., and the embodiments of the present invention are described in the following several achievable manners:
  • the joint channel matrix of the first cell at the second moment is determined by using the EZF according to the CSI of the first pre-scheduled user and the CSI of the second pre-scheduled user, and determining the first cell according to the joint channel matrix.
  • the first transmission weight is used to determine the first cell according to the joint channel matrix.
  • the transmission signal of each user in the middle and the CBF cooperation user of the first cell The channel feature direction of the (ie, the second pre-scheduled user) is orthogonal.
  • the PSI of the first base station to the first pre-scheduled user and the second pre-scheduled user may be obtained by the CSI of the information exchange between the cells, and the characteristic vector (also called the eigenvector) corresponding to the PMI is used as the reconstruction of the downlink channel.
  • the input parameter is the feature vector ⁇ V u
  • the constructed EZF joint channel matrix is:
  • the weight matrix of the paired users in the first cell m is:
  • T is the number of transmitting antennas of the first cell m
  • H in the upper right corner represents the conjugate transposed matrix
  • -1 in the upper right corner represents the inverting matrix
  • the number of streams of each first pre-scheduled user in the first cell is The total number of streams is L, and now it is calculated how many streams are required to be transmitted by the first cell, that is, the spatial dimension.
  • the required quantity is selected.
  • only the first L column vectors are selected from the W use as the weight vector of the signal transmission for the first pre-scheduled user of the first cell, that is, The first L column vectors are selected as the first transmission weight of the first cell in W use .
  • a second implementation manner according to the CSI of the first pre-scheduled user and the CSI of the second pre-scheduled user, determining, by using the REZF, the joint channel matrix of the first cell at the second moment, and determining, according to the joint channel matrix, the first cell The first transmission weight.
  • REZF REZF
  • the modulus value T is the number of transmit antennas in the first cell
  • N 1 is the number of first pre-scheduled users in the first cell at the second time.
  • T is the number of transmit antennas in the first cell m
  • H in the upper right corner is the conjugate transposed matrix
  • "-1" in the upper right corner is the inverse matrix
  • diag( ⁇ ) is A diagonal matrix
  • the dimension of diag( ⁇ ) is the total number of layers of H
  • the rank of diag( ⁇ ) is L
  • its elements are The right-multiplied diagonal array diag( ⁇ ) is to normalize the power of each column of the cell weight matrix
  • the vth element on the diagonal of diag( ⁇ ) is the matrix H(k) H *(H( k) *H(k)H+diag( ⁇ ))
  • the reciprocal of the modulus of the vth column vector of -1 is the reciprocal of the modulus of the vth column vector of -1 .
  • the number of streams of each first pre-scheduled user in the first cell is The total number of streams is L, and now it is calculated how many streams are required to be transmitted by the first cell, that is, the spatial dimension.
  • the required quantity is selected.
  • only the first L column vectors are selected from the W use as the weight vector of the signal transmission for the first pre-scheduled user of the first cell, that is, The first L column vectors are selected as the first transmission weight of the first cell in W use .
  • a third implementation manner according to the CSI of the first pre-scheduled user and the CSI of the second pre-scheduled user, determining, by using the SLNR, the joint channel matrix of the first cell at the second moment, and determining, according to the joint channel matrix, the first cell The first transmission weight.
  • the maximum SLNR weight is the eigenvector W corresponding to the largest eigenvalue of the matrix VDV -1 :
  • the modulus value T is the number of transmit antennas in the first cell
  • N 1 is the number of first pre-scheduled users in the first cell at the second time.
  • T is the number of transmitting antennas of the first cell m
  • the total received noise power before the CBF is performed for the first pre-scheduled user a v , 1 ⁇ v ⁇ N1, where N R is the number of receiving antennas of the first pre-scheduled user a v , The average noise power of each of the receiving antennas in the first pre-scheduled user a v .
  • the number of streams of each first pre-scheduled user in the first cell is The total number of streams is L, and now it is calculated how many streams are required to be transmitted by the first cell, that is, the spatial dimension.
  • the required quantity is selected.
  • only the first L column vectors are selected from the W use as the weight vector of the signal transmission for the first pre-scheduled user of the first cell, that is, The first L column vectors are selected as the first transmission weight of the first cell in W use .
  • the CBF weight adjustment is relative to the traditional transmission weight.
  • the determination process of the conventional transmission weight may refer to the determination method of step 204 described later.
  • Step 204 The first base station determines, according to a conventional technology, a first transmission weight of the first cell at the second moment. Go to step 205.
  • the first base station may first calculate the first transmission weight of the first cell at the second moment according to the traditional technology, for example, calculate the first cell at the second moment according to the content in the standard 3GPP36.211-3GPP 36.213.
  • the first transmission weight is calculated according to the CQI reported by the first pre-scheduled user.
  • the first transmission weight is calculated in the first pre-scheduling process corresponding to the foregoing step 201.
  • Step 205 The first base station receives a second transmission weight value sent by the second base station to which the second cell belongs in the data transmission system at the second moment.
  • each base station performs the determination of the transmission weight of the cell in the second time.
  • the method for determining the transmission weight may refer to the foregoing step 203 or 204, which is not described in detail in the embodiment of the present invention.
  • the base station And transmitting, by the base station, the calculated transmission weight to the associated neighboring cell.
  • the first base station receives the second transmission weight sent by the second base station to which the second cell belongs in the data transmission system at the second moment.
  • the second cell is an associated neighboring cell of the first cell, and includes a neighboring cell that meets a preset interaction condition in a neighboring cell of the first cell, where the preset interaction condition is defined according to a specific transmission scenario. of.
  • the neighboring area in the neighboring cell of the first cell that meets the preset interaction condition may be the base station to which the first base station sends the user measurement set within the preset time period, that is, the second base station includes the preset time length.
  • the preset duration is greater than or equal to the interval between the first moment and the second moment.
  • the preset duration may be 8 time slots.
  • the first base station receives the transmission weight sent by the base station of the user measurement set of the first pre-scheduled user, that is, the first or the current first determined by the first base station. Scheduling The base station to which the user interferes with the source interferes with the cell and returns the transmission weight of the second time to the first base station.
  • the first base station may send the first transmission weight to the base station to which the associated neighboring cell belongs, and the base station to which the associated neighboring cell belongs is preset to the first time.
  • the first transmission weight is sent to the base station to which the associated neighboring cell belongs, and the first transmission weight is the weight of the CBF weight adjustment, which is determined in step 203.
  • the first weight is the weight of the CBF weight adjustment.
  • the first transmission weight is sent to the base station to which the associated neighboring cell belongs, and the first transmission weight is a weight that is not adjusted by the CBF weight, which is determined in step 204.
  • the first weight is a weight that is not adjusted by the CBF weight, which is determined in step 204.
  • the neighboring cell in the neighboring cell of the first cell that meets the preset interaction condition may be all neighboring cells of the first cell, that is, the second cell includes all neighboring cells of the first cell.
  • the first base station receives the transmission weights sent by the base stations to which all the neighboring cells belong, that is, the base stations of the neighboring cells of the first base station feed back the first base station to the second time. Launch weight.
  • the first base station may send the first transmission weight to the base station of all neighboring cells of the first cell, because the second cell in this scenario For all neighboring cells of the first cell, the first base station may send the first transmission weight to the second base station.
  • the first transmitting weight is sent to the second base station, and the first transmitting weight is a weight that is not adjusted by the CBF weight, which is determined in step 203.
  • the first weight is a weight that is not adjusted by the CBF weight, which is determined in step 203.
  • the first transmission weight is sent to the second base station, and the first transmission weight is the weight of the CBF weight adjustment, that is, the first weight determined in step 204. .
  • Step 206 The first base station calculates, according to the first transmission weight and the second transmission weight, a signal-to-interference ratio (SINR) of each user in the first cell (English: Singal-to-Interference plus Noise Ratio, SINR for short).
  • SINR signal-to-interference ratio
  • the SINR calculation method of the first user is used. different.
  • TDD Time Division Duplexing
  • FDD Frequency Division Duplexing
  • calculating a signal to interference and noise ratio SINR of each user in the first cell according to the first transmission weight and the second transmission weight Process including:
  • the first user k is any user of the first cell at the second moment
  • SINR k,l is the SINR of the first stream of the first user k at the second moment
  • H i,k is the first base station i to the first User k's channel
  • y is the target neighboring area of the first user k
  • the target neighboring area is one of the neighboring areas measurable by the first user k in the second cell, that is, the weight is sent to the first cell.
  • H y,k is the channel of the target neighboring zone y to the first user k
  • the noise is the self-noise noise of the first user
  • Y is the first user k in the second cell
  • the total number of neighbors that can be measured, w y, f is the transmission weight of the f-stream of the target neighboring zone y at the second moment, and Fy is the total number of transmitted streams of the target neighboring zone y at the second moment.
  • the SINR of any user in the cell is positively related to the product of its channel and the transmission weight, and is negatively related to the product of the channel and the transmission weight of the neighboring cell that can be measured.
  • Signal to noise ratio calculation The SINR calculated by the equation is more accurate than the SINR determined according to the CQI reported by the user.
  • SINR signal to interference and noise ratio
  • the first user k is any user of the first cell at the second moment
  • the SINR k, l is the SINR of the first stream of the first user k at the second moment
  • the RSRP k, i is the first user at the second moment.
  • k measured the SINR of the first cell i to the first user, H represents the conjugate transpose of the matrix
  • y is the target neighboring zone of the first user k
  • the target neighboring zone is the first user k in the second cell
  • One of the measured neighboring cells, RSRP k, y is the RSRP of the target neighboring zone y measured by the first user k at the second moment to the first user k
  • Y is measurable by the first user k in the second cell.
  • the total number of neighboring cells, Fy is the total number of transmitted streams of the target neighboring zone y at the second moment, w y, f is the transmitting weight of the f-th stream of the target neighboring zone y at the second moment, w k, y is used for characterization
  • the target neighboring zone y is the channel of the first user k, and the dimension of w k,y is the same as the dimension of w y,f .
  • w k, SU, l is the transmission weight of the first stream of the first user k before the CBF weight adjustment, that is, The transmission weight is the first transmission weight determined by the foregoing step 204, and w k, CBF, l is the transmission weight of the first stream of the first user k after the CBF weight adjustment, that is, the transmission weight.
  • w k, SU, l is equal to w k, CBF, l , indicating that the first stream of the first user k is
  • the transmission weight of the second moment, that is, the transmission weight is the first transmission weight determined by the above step 204.
  • the above second signal to noise ratio calculation formula can be adjusted to:
  • the dimension of the above w k,y may be characterized by the number of rows and columns of the precoding matrix corresponding to the PMI of the first base station, which is measured by the first user k according to the number of streams of the first user k.
  • the SINR of any user in the cell is positively related to the product of its channel and the transmission weight, and is also positively related to its RSRP, and negatively related to the channel and transmission right of the neighboring cell that it can measure.
  • the product of the value is also negatively related to the RSRP of the neighboring cell that can be measured.
  • the SINR calculated by the first signal to noise ratio calculation formula is more accurate than the SINR determined according to the CQI reported by the user.
  • Step 207 The first base station selects a target at the second moment in the user of the first cell according to a Singal-to-Interference plus Noise Ratio (SINR) of the second time of each user. Schedule users.
  • SINR Singal-to-Interference plus Noise Ratio
  • the target scheduling user at the second moment is filtered out by the user of the first cell according to the SINR of the second time, including:
  • Step 2071 The first base station determines, according to the SINR of each user at the second moment, the MCS of each user at the second moment;
  • the MCS can be obtained by querying the preset table in the 3GPP protocol according to the SINR, which is not described in detail in the embodiment of the present invention.
  • Step 2072 The first base station determines, according to the MCS of each user at the second moment, the spectrum efficiency of each user at the second moment;
  • the spectrum efficiency of each user at the second moment can be determined according to the MCS of each user at the second moment by means of table lookup.
  • Step 2073 The first base station filters the target scheduling user at the second moment in the first cell according to the spectrum efficiency of each user at the second moment.
  • step 2073 Referring to the proportional fair algorithm in step 201, in step 2073, except that the algorithm of spectral efficiency of each user at the second moment is different from the algorithm provided in step 201, the algorithm of other parameters is the same as the proportional fair algorithm provided by the algorithm. .
  • the user p satisfying the PF principle can satisfy the following PF formula:
  • E k (f) is the spectral efficiency of the spectrum resource to be scheduled of the user k on the subframe f, which is obtained by using the above step 2071, where 1 ⁇ k ⁇ K, where K is the total number of users in the cell, T k ( f) is the total amount of data transmission of the user k in the subframe before the subframe f and the subframe f, Indicates the maximum value of user 1 to user K.
  • T k (f-1) of the user k refer to the foregoing step 201, which is not repeatedly described in the embodiment of the present invention.
  • the user k having the largest ratio of E k (f) to T k (f-1) is the target scheduled user at the second time.
  • the target scheduling user is the user who most closely matches the first transmission weight and the second transmission weight at the second moment and has the highest priority.
  • Step 208 At the second moment, the first base station uses the MCS of the target scheduling user to transmit data to the target scheduling user.
  • the MCS of the target scheduling user since the MCS of the target scheduling user has been determined in step 2071, the MCS of the target scheduling user may be directly obtained, and at the second moment, the MCS of the target scheduling user is used to schedule the user to the target. transfer data.
  • the transmission weight used at this time is the first transmission weight calculated in step 203, and the transmission weight used by the second base station is the second transmission weight sent in step 205.
  • the first base station may also transmit data to the target scheduling user according to the PF principle at the second moment. That is, the MCS calculated by the proportional fairness algorithm provided in step 201 is used to transmit data to the target scheduling user at the second moment, and the transmission weight used at this time is the first transmission weight calculated in step 204, The transmission weight used by the second base station is the second transmission weight that it transmits in step 205.
  • the first base station after determining, by the first cell, the first pre-scheduled user at the second time, the first base station ensures that the transmission of the first cell and its associated neighboring area is not adjusted. Under the premise of the weight, the user who meets the highest transmission priority and the highest priority is found as the target scheduling user at the second moment, avoiding the situation that the transmission weight is invalid during the actual scheduling, and improving the reliability of the interference avoidance.
  • the neighboring area may refer to an inter-station neighboring area, or may be an intra-station neighboring area, especially in a scenario where the inter-station neighboring area has a long interaction delay. Effectively avoid the failure of the transmission weight when the actual scheduling.
  • the embodiment of the present invention adopts two scheduling modes, such as the first pre-scheduling process provided in step 201 above and the second pre-scheduling process provided in step 207, so that the data transmission system can perform overall coordinated interference management.
  • the scheduling process and the synergy are combined to overcome the shortcomings of the previous scheduling and coordination.
  • the method for determining a scheduling user is mainly performed by using the first base station as an example.
  • each base station may be the same as the first base station.
  • the pre-scheduling process is performed twice in a pre-scheduling period (that is, the time period from the first time to the second time mentioned above), and the base station to which the neighboring cell belongs usually has information interaction.
  • FIG. 2-4 The embodiment of the present invention uses the interaction between a base station (English: base station, BS: 01) and BS02 as an example. It is assumed that the user in the cell 1 served by the BS01 includes the UE011 and the BS02 service.
  • the user in the cell 2 includes the UE 021, and the BS01 and the BS02 can broadcast the channel state information-reference signal (English: Channel State Information-Reference Signal, CSI-RS), and the UE011 can reply to the CSI feedback of the CSI-RS of the BS01. :feedback), UE021 can reply CSI feedback to the CSI-RS of BS02.
  • the BS1 and the BS02 may perform the first pre-scheduling process.
  • the first cell and the second neighboring cell are adjacent to each other or mutually interfered with each other.
  • the user measurement set and the CSI refer to step 2022 above.
  • the first base station and the second base station determine whether to perform CBF weight adjustment according to the received pre-scheduling information, and then determine a transmission weight at the second moment according to the determination result. Since the first cell and the second neighboring cell are adjacent to each other, and the first cell and the second neighboring cell also interact with the user measurement set within a preset duration, the two meet the relationship of the associated neighboring cell defined in step 205.
  • the weight of the CBF weights may be the weights of the CBF weights. For details, refer to the weights determined in step 203 or the weights of the CBF weights. For details, refer to step 204. The weight determined.
  • the first base station and the second base station perform the second pre-scheduling process according to the received weight and the weight of the second base station. For details, refer to step 207 above. It is assumed that after the second pre-scheduling process, the target scheduling user of the first cell is UE011, and the target scheduling user of the second cell is UE021, and the BS01 passes the user-specific reference signal (English: User equipment-reference signal, referred to as UE-RS)
  • the DM-RS transmits the determined transmission weight to the UE011, and uses the transmission weight to perform scheduling; the BS02 transmits the determined transmission weight to the UE021 through the UE-RS, and uses the transmission weight to perform scheduling.
  • the purpose of the foregoing first layer pre-scheduling process is: the backhaul line delay exists in the distributed system due to the scheduling result between the cells and the CSI information interaction, and the real transmission time (that is, the second time period) The information exchange cannot be completed. Therefore, the pre-scheduled mode is used to predict the scheduled user of a certain real-time transmission time according to the CSI information of the current time of each cell (that is, the first time).
  • the pre-scheduling result and CSI information of the inter-cell interaction are used for the coordinated weight design of the CBF.
  • the purpose of the second layer pre-scheduling process is that the user service state in the cell may change with the pre-scheduling time in the real-time sending time (the scenario may refer to the scenario in Figure 1-4), and the pre-scheduling result is still not guaranteed. Applicable to the community.
  • the transmission weight of each cell is not changed. (In the embodiment of the present invention, whether the CBF weight adjustment is performed, the transmission weights of the cells are not adjusted after the mutual transmission of the weights, Destroy interference management within the system.
  • the target scheduling user On the basis of the constant weight, through the second layer pre-scheduling process, a user who matches the given transmission weight of the entire data transmission system (that is, the highest priority under this weight) is sought as the target scheduling user.
  • This will bring two benefits: 1) After the transmission weight design, it may not be more suitable for the original pre-scheduled users, more suitable users will be selected to become the target scheduling users; 2) the original pre-scheduled users may Because of network changes or user movements Disappears, but the replacement (that is, the target scheduling user) is closest to the pre-scheduled user; 3) the new high-priority user allows the cut-in, but does not change the transmission weight of the data transmission system, without destroying the previous system-wide Interference management design.
  • the embodiment of the present invention provides a determining device for a scheduling user, which is applied to a first base station of a data transmission system, where the first base station includes at least two antennas, and the first base station manages the first cell, as shown in Figure 3-1.
  • the device includes:
  • a first determining module 301 configured to determine, at a first moment, a first pre-scheduled user at a second moment in a user of the first cell, where the second moment is after the first moment;
  • a second determining module 302 configured to determine a first transmit weight of the first cell at a second moment
  • a first receiving module 303 configured to receive a second transmission weight that is sent by the second base station to which the second cell belongs in the data transmission system, where the second cell includes the first cell a neighboring area in the neighboring area that meets the preset interaction condition;
  • the calculation module 304 is configured to calculate, according to the first transmission weight and the second transmission weight, a signal to interference and noise ratio SINR of each user in the first cell at the second moment;
  • the screening module 305 is configured to filter, according to the SINR of each user at the second moment, the target scheduling user of the second moment in the user of the first cell.
  • the first time determining module does not adjust the first cell and its associated neighboring area.
  • the screening module finds the user who most closely matches the transmission weight at the second moment as the target scheduling user, avoids the situation that the transmission weight is invalid during actual scheduling, and improves the reliability of interference avoidance.
  • the data transmission system is a time division duplex TDD system
  • the calculating module 304 is configured to:
  • the first user k is any user of the first cell at the second moment
  • SINR k,l is the SINR of the first stream of the first user k at the second moment
  • H i,k is the first base station.
  • the y is a target neighboring area of the first user k
  • the target neighboring area is a neighboring area measurable by the first user k in the second cell
  • H y,k is the channel of the target neighboring area y to the first user k
  • the noise is the self-noise noise of the first user
  • the Y is the second cell
  • w y, f is the transmission weight of the f-stream of the target neighboring zone y at the second moment
  • Fy is the target neighboring zone y The total number of streams transmitted at the second moment.
  • the data transmission system is a frequency division duplex FDD system.
  • the calculating module 304 is configured to:
  • the first user k is any user of the first cell at the second time
  • the SINR k, l is the SINR of the first stream of the first user k at the second time
  • the RSRP k, i is in the At a second time
  • H represents a conjugate transpose of a matrix, where y is a target neighboring area of the first user k, The target neighboring area is one of the neighboring areas measurable by the first user k in the second cell, and the RSRP k, y is the target measured by the first user k at the second moment.
  • the Y is the total number of neighboring cells measurable by the first user k in the second cell
  • Fy is the target neighboring zone y in the first
  • the total number of transmission streams at two moments, w y, f is the transmission weight of the f-stream of the target neighboring region y at the second moment, and w k, y is used to characterize the target neighboring region y to the
  • the channel of the first user k the dimension of the w k,y is the same as the dimension of the w y,f
  • Characterized by the first user k according to the number of rows and columns PMI of the precoding matrix that is measured by the first user k and reported to the first base station;
  • the w k, SU, l is equal to the w k, CBF, l , And indicating a transmission weight of the first stream of the first user k at the second moment.
  • the device further includes:
  • the obtaining module 306 is configured to acquire, after the first pre-scheduled user of the second time in the user of the first cell, the user measurement set of the first pre-scheduled user, and the user measurement of the first pre-scheduled user And a set of interference source neighboring areas for recording the first pre-scheduled user, and an interference level of the RSRP of the interference source neighboring area to the first pre-scheduled user;
  • the second receiving module 307 is configured to receive pre-scheduling information sent by the third base station to which the third cell belongs, where the pre-scheduling information includes: a user measurement set of the third pre-scheduled user, where the third pre-scheduled user is the a pre-scheduled user at the second moment determined by the third base station at the first moment, where the user measurement set of the third pre-scheduled user is used to record an interference source neighboring region that interferes with the third pre-scheduled user, and The degree of interference of the RSRP of the neighboring cell of the interference source with the third pre-scheduled user, where the third cell is the cell in the neighboring cell of the first cell that is interfered by the first cell or all of the first cell Neighborhood;
  • the third determining module 308 is configured to determine, according to the user measurement set of the first pre-scheduled user and the user measurement set of the third pre-scheduled user, whether the first pre-scheduled user is a CBF to be adjusted user.
  • the neighboring cell that meets the preset interaction condition in the neighboring cell of the first cell is a base station to which the first base station sends the user measurement set to the preset time period, where the preset duration is greater than or equal to The interval between the first time and the second time is as shown in FIG. 3-3.
  • the device further includes:
  • the sending module 309 is configured to: after determining the first transmit weight of the first cell at the second moment, The base station to which the neighboring cell belongs sends the first transmission weight, and the base station to which the associated neighboring cell belongs is the base station that has sent the user measurement set to the first base station within the preset duration.
  • the device further includes:
  • the sending module 309 is configured to send the first transmission weight to the second base station after determining the first transmission weight of the first cell at the second time.
  • the screening module 305 is configured to:
  • the target scheduling user of the second moment is screened in the first cell by using a proportional fairness principle.
  • the pre-scheduling information further includes: channel state information CSI of the third pre-scheduled user, where the second determining module 302 is configured to:
  • the n is the most severe first n users that are interfered by the first cell, where n is a threshold number of users that the first cell can coordinate;
  • Determining the first of the first cell by using a feature vector zero-forcing EZF, a regularized feature vector zero-forcing REZF, or a maximized signal leakage noise ratio SLNR according to the CSI of the first pre-scheduled user and the CSI of the CBF cooperative user Launch weight.
  • the first time determining module does not adjust the first cell and its associated neighboring area.
  • the screening module finds the user with the highest priority and the highest priority as the target scheduling user at the second moment, avoiding the situation that the transmission weight is invalid during the actual scheduling, and improving the reliability of the interference avoidance.
  • the embodiment of the present invention further provides a data transmission system, including: at least two base stations, where the at least two base stations include the first base station, and the first base station includes any one of Figure 3-1 to Figure 3-3.
  • the determining device for scheduling the user is shown.
  • FIG. 4 is a schematic structural diagram of a determining apparatus for scheduling users according to an exemplary embodiment of the present application.
  • the device can be configured in a base station.
  • the apparatus may include a transmitter 301, a receiver 302, and a processor 303.
  • the processor 303 can be used to perform the determining method of the scheduling user shown in the foregoing FIGS. 2-1 to 2-3.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it may be implemented in whole or in part in the form of a computer program product comprising one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a readable storage medium of a computer or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data Center through wired (eg coaxial cable, fiber optic, digital users) Wire) or wireless (eg infrared, wireless, microwave, etc.) to another website site, computer, server or data center.
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium, or a semiconductor medium (eg, a solid state hard disk) or the like.

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Abstract

本申请提供了一种度用户的确定方法、装置及系统，涉及通信领域，包括：一种调度用户的确定方法，应用于第一基站，该第一基站管理第一小区，该方法包括：在第一时刻，在第一小区的用户中确定第二时刻的第一预调度用户；确定第一小区在第二时刻的第一发射权值；接收数据传输系统中第二小区所属的第二基站发送的在第二时刻的第二发射权值，第二小区包括第一小区的邻区中符合预设交互条件的邻区；根据第一发射权值和第二发射权值，计算第一小区中每个用户在第二时刻的信干噪比SINR；根据每个用户在第二时刻的SINR，在第一小区的用户中筛选出第二时刻的目标调度用户。本申请解决了目前的干扰避让的可靠性差的问题。本申请能够用于数据传输。

Description

调度用户的确定方法、装置及系统 技术领域
本申请涉及通信领域，特别涉及一种调度用户的确定方法、装置及系统。
背景技术
多输入多输出(英文：Multiple-Input Multiple-Output，简称：MIMO)波束赋形(英文：Beamforming)技术是利用信道信息对发射信号进行加权以形成波束的一种波束赋形方法，其在发射端和接收端分别使用多个发射天线和多个接收天线，使信号通过发射端与接收端的多个天线进行传输。
但随着网络中部署小区(英文：cell)的逐渐增多、小区间距离的不断减小、负载的逐步增加等等因素，不同小区间相同时频资源上的相互干扰正变得越来越严重，因而引入了下行链路(英文：Downlink，简称：DL)协同多点传输(英文：CoordinatedMulti-Point，简称：CoMP)功能，旨在通过小区间的协作以提升高速信号传输覆盖、小区边缘速率以及系统平均速率。
目前的DL CoMP技术提供一种协同波束赋形(英文：Coordinated Beamforming，简称：CBF)技术，可以通过协调各小区的波束赋形方向，以减少相互之间的干扰进而获得系统收益的技术。例如，当小区A和小区B在相同时频资源上各自服务一个用户设备(英文：User Equipment，简称：UE)(简称用户)，而小区A下行信号对小区B中的用户干扰较大时，可通过协调小区A的发射信号的权值来实现干扰避让。具体的，可以预先估计实际发送时刻是目标调度用户，以及该目标调度用户的权值，当目标调度用户需要进行干扰避让时，再获取小区A以及小区B的发射权值，根据小区A以及小区B的发射权值调整实际发送时刻目标调度用户的权值，再根据调整后的权值在实际发送时刻向该目标调度用户传输数据。
现有的长期演进(英文：Long Term Evolution，简称：LTE)系统通常包括两种网络架构，分别是集中式网络架构和分布式网络架构，其中集中式网络架构的站间邻区的信号传输时延远远小于分布式网络架构的的站间邻区的信号传输时延。在CBF技术中，为了实现干扰避让，各小区需要知道邻区的调度信息以及基站到邻区中用户的信道等相关信息以进行相应的权值调整，而在目前的分布式网络架构下，由于站间邻区的信号传输时延较大，而干扰避让对实时性的要求较高，容易出现在实际调度时刻发射权值对于目标调度用户失效的情况，因此，在分布式网络架构下，目前的干扰避让的可靠性较差。
发明内容
为了解决在分布式网络架构下，目前的干扰避让的可靠性差，本申请提供了一种调度用户的确定方法、装置及系统。所述技术方案如下：
第一方面，提供一种调度用户的确定方法，应用于数据传输系统的第一基站，所述第一基站包括至少两个天线，所述第一基站管理第一小区，所述方法包括：
在第一时刻，在所述第一小区的用户中确定第二时刻的第一预调度用户，所述第二时刻在所述第一时刻之后；示例的，可以在第一时刻，采用比例公平原则在所述第一小区的用户中确定第二时刻的第一预调度用户。
确定所述第一小区在第二时刻的第一发射权值；
接收所述数据传输系统中第二小区所属的第二基站发送的在所述第二时刻的第二发射权值，所述第二小区包括所述第一小区的邻区中符合预设交互条件的邻区；
根据所述第一发射权值和所述第二发射权值，计算所述第一小区中每个用户在所述第二时刻的信干噪比SINR；
根据每个用户在所述第二时刻的SINR，在所述第一小区的用户中筛选出所述第二时刻的目标调度用户。
本发明实施例提供的调度用户的确定方法，在第一时刻第一基站在第一小区的用户中确定第二时刻的第一预调度用户后，在保证不调整第一小区和其关联邻区的发射权值的前提下，根据第一发射权值和第二发射权值计算第一小区中每个用户在第二时刻的SINR，并根据每个用户在第二时刻的SINR，在第一小区的用户中筛选出第二时刻的目标调度用户，由于该SINR是根据第一小区和其关联邻区的发射权值计算得到的，相较于根据CQI计算得到SINR更为准确，因此可以更准确地确定在第二时刻最符合该发射权值的目标调度用户，避免实际调度时发射权值失效的情况，提高干扰避让的可靠性。
数据传输系统为时分双工(英文：Time Division Duplexing；简称：TDD)系统或频分双工(Frequency Division Duplexing，简称：FDD)系统时，其第一用户的SINR的计算方法不同。本发明实施例以以下两种可实现方式为例进行说明：
在第一种可实现方式中，数据传输系统为TDD系统，所述根据所述第一发射权值和所述第二发射权值，计算所述第一小区中每个用户在所述第二时刻的信干噪比SINR，包括：
根据第一发射权值和第二发射权值，采用第一信噪比计算公式，计算第一用户k在第二时刻的SINR，所述第一信噪比计算公式为：
Figure PCTCN2017080257-appb-000001
其中，第一用户k为第二时刻所述第一小区的任一用户，SINRk，l为所述第一用户k的第l流在第二时刻的SINR，Hi,k为第一基站i到所述第一用户k的信道，所述y为所述第一用户k的目标邻区，所述目标邻区为所述第二小区中所述第一用户k可测量到的邻区中一个，Hy,k为所述目标邻区y到所述第一用户k的信道，所述noise为所述第一用户的自身底噪，所述Y为所述第二小区中所述第一用户k可测量到的邻区的总数，wy,f为所述目标邻区y的第f流在所述第二时刻的发射权值，Fy为所述目标邻区y在所述第二时刻的总发射流数。
由上可知，在TDD系统中，小区中任一用户的SINR正相关于其信道与发射权值的乘积正相关，负相关于其能够测量到的邻区的信道与发射权值的乘积，通过上述第一信噪比计算公式所计算得到的SINR相较于根据用户上报的CQI所确定的SINR更为准确。
在第二种可实现方式中，数据传输系统为频分双工FDD系统，所述根据所述第一发射权值和所述第二发射权值，计算所述第一小区中每个用户在所述第二时刻的信干噪比SINR，包括：
根据第一发射权值和第二发射权值，采用第二信噪比计算公式，计算第一用户k在第 二时刻的SINR，所述第二信噪比计算公式为：
Figure PCTCN2017080257-appb-000002
其中，第一用户k为第二时刻所述第一小区的任一用户，SINRk，l为所述第一用户k的第l流在第二时刻的SINR，RSRPk,i为在所述第二时刻所述第一用户k测量到的第一小区i到所述第一用户的SINR，H表示求矩阵的共轭转置，所述y为所述第一用户k的目标邻区，所述目标邻区为所述第二小区中所述第一用户k可测量到的邻区中一个，RSRPk,y为在所述第二时刻所述第一用户k测量到的所述目标邻区y到所述第一用户k的RSRP，所述Y为所述第二小区中所述第一用户k可测量到的邻区的总数，Fy为所述目标邻区y在所述第二时刻的总发射流数，wy,f为所述目标邻区y的第f流在所述第二时刻的发射权值，wk,y用于表征所述目标邻区y到所述第一用户k的信道，所述wk,y的维度和所述wy,f的维度相同，由所述第一用户k按照所述第一用户k的流数为1进行测量并上报给所述第一基站的预编码矩阵的行列数PMI来表征；
当所述第一小区在所述第一时刻至所述第二时刻之间进行过协同波束赋形CBF权值调整，所述wk，SU,l为所述第一用户k的第l流在CBF权值调整前的发射权值，所述wk,CBF,l为所述第一用户k的第l流在CBF权值调整后的发射权值；
当所述第一小区在所述第一时刻至所述第二时刻之间未进行过协同波束赋形CBF权值调整，所述wk，SU,l等于所述wk,CBF,l，表示所述第一用户k的第l流在所述第二时刻的发射权值。
需要说明的是，上述wk,y的维度可以由第一用户k按照第一用户k的流数为1进行测量并上报给第一基站的PMI对应的预编码矩阵的行列数来表征。
由上可知，在FDD系统中，小区中任一用户的SINR正相关于其信道与发射权值的乘积正相关，也正相关于其RSRP，负相关于其能够测量到的邻区的信道与发射权值的乘积，也负相关于其能够测量到的邻区的RSRP，通过上述第一信噪比计算公式所计算得到的SINR相较于根据用户上报的CQI所确定的SINR更为准确。
可选的，在所述第一小区的用户中确定第二时刻的第一预调度用户之后，所述方法还包括：
获取所述第一预调度用户的用户测量集，所述第一预调度用户的用户测量集用于记录干扰所述第一预调度用户的干扰源邻区，以及所述干扰源邻区的RSRP对所述第一预调度用户干扰程度；
接收第三小区所属第三基站发送的预调度信息，所述预调度信息包括：第三预调度用户的用户测量集，所述第三预调度用户为所述第三基站在所述第一时刻确定的所述第二时刻的预调度用户，所述第三预调度用户的用户测量集用于记录干扰所述第三预调度用户的干扰源邻区，以及所述干扰源邻区的RSRP对所述第三预调度用户干扰程度，所述第三小区 为所述第一小区的邻区中被所述第一小区干扰的小区或所述第一小区的所有邻区；
根据所述第一预调度用户的用户测量集和所述第三预调度用户的用户测量集，确定所述第一预调度用户是否为CBF待调整用户。
在上述获取所述第一预调度用户的用户测量集的过程可以包括判断第一预调度用户是否为CBF候选用户的过程，具体如下：
第一基站获取第一预调度用户接收的第一预调度用户的所有邻区的RSRP总和ΣRSRPg，g为第一预调度用户的邻区总数；第一基站确定第一预调度用户的干扰总和，该干扰总和等于ΣRSRPg与第一预调度用户的自身底噪noise之和；第一基站将该第一预调度用户的所有邻区的RSRP进行降序排序(也即是由高到低排序)；第一基站根据排序后的所有邻区的RSRP确定第一预调度用户是否为CBF候选用户。
在一种可实现方式中，第一基站根据排序后的所有邻区的RSRP确定第一预调度用户是否为CBF候选用户的过程具体包括：
设置i＝1，执行以下步骤：
A、检测i的大小，执行步骤B或C；
B、若1≤i≤n，获取排序后的前i个RSRP之和，n为预设的检测次数阈值，执行步骤D；
C、若i>n，确定第一预调度用户不是CBF候选用户，结束动作；
D、判断前i个RSRP之和与干扰总和的比值是否大于预设的干扰噪声比值，执行步骤E或F；
E、当前i个RSRP之和与干扰总和的比值大于预设的干扰噪声比值，确定第一预调度用户是CBF候选用户；
F、当前i个RSRP之和与干扰总和的比值不大于预设的干扰噪声比值，更新i，使得更新后的i＝i+1，重复执行步骤A-F。
其次，当第一预调度用户为CBF候选用户时，为第一预调度用户建立用户测量集。实际应用中，无论第一预调度用户是否为CBF候选用户，第一基站也可以为该第一预调度用户建立第一预调度用户的用户测量集，第一基站可以在该用户测量集中记录该第一预调度用户是否为CBF候选用户。
在本发明实施例中，第二小区是第一小区的关联邻区，其包括第一小区的邻区中符合预设交互条件的邻区，该预设交互条件是根据具体传输场景所定义的。
一方面，第一小区的邻区中符合预设交互条件的邻区可以为在预设时长内第一基站向其发送过用户测量集的基站，也即是第二小区包括预设时长内第一基站向其发送过用户测量集的基站。该预设时长大于或等于第一时刻与第二时刻的间隔时长。可选的，该预设时长可以为8个时隙。在这种场景中，第一基站会接收到其之前发送过第一预调度用户的用户测量集的基站所发送的发射权值，也即是，第一基站确定的曾经或者当前对第一预调度用户产生干扰的源干扰小区所属基站均会向第一基站反馈其在第二时刻的发射权值。
相应的，在确定第一小区在第二时刻的第一发射权值之后，第一基站可以向关联邻区所属基站发送第一发射权值，关联邻区所属基站为预设时长内向第一基站发送过用户测量集的基站。
具体的，当第一预调度用户为CBF待调整用户，向关联邻区所属基站发送第一发射权 值，第一发射权值为CBF权值调整后的权值。
当第一预调度用户不为CBF待调整用户，向关联邻区所属基站发送第一发射权值，第一发射权值为未进行CBF权值调整的权值。
另一方面，第一小区的邻区中符合预设交互条件的邻区可以为第一小区的所有邻区，也即是第二小区包括第一小区的所有邻区。在这种场景中，第一基站会接收到其所有邻区所属基站所发送的发射权值，也即是，第一基站的邻区所属基站均会向第一基站反馈其在第二时刻的发射权值。
相应的，在确定第一小区在第二时刻的第一发射权值之后，第一基站可以向第一小区的所有邻区所属基站发送第一发射权值，由于在这种场景中第二小区为第一小区的所有邻区，则第一基站可以向第二基站发送第一发射权值。
具体的，当第一预调度用户不为CBF待调整用户，向第二基站发送第一发射权值，第一发射权值为未进行CBF权值调整的权值。
当第一预调度用户为CBF待调整用户，向第二基站发送第一发射权值，第一发射权值为CBF权值调整后的权值。
可选的，所述根据每个用户在所述第二时刻的SINR，在所述第一小区的用户中筛选出所述第二时刻的目标调度用户，包括：
根据每个用户在所述第二时刻的SINR，确定所述每个用户在第二时刻的调制和编码方案MCS；
根据所述每个用户在第二时刻的MCS，确定每个用户在第二时刻的频谱效率；
根据所述每个用户在第二时刻的频谱效率，采用比例公平原则在所述第一小区中筛选所述第二时刻的目标调度用户。
采用比例公平原则，可以在保证不调整第一小区和其关联邻区的发射权值的前提下，找到第二时刻最符合该发射权值且优先级最高的用户作为目标调度用户，避免实际调度时发射权值失效的情况，提高干扰避让的可靠性。
可选的，所述预调度信息还包括：第三预调度用户的信道状态信息CSI，所述确定所述第一小区的第一发射权值，包括：
当所述第一预调度用户为CBF待调整用户，从所述第三预调度用户的CSI中获取CBF协作用户的CSI，所述CBF协作用户为所述第一基站确定的所述第三预调度用户中受所述第一小区干扰的最严重的前n个用户，所述n为所述第一小区能够协调的用户个数阈值；
根据所述第一预调度用户的CSI和所述CBF协作用户的CSI，采用特征向量迫零EZF、正则化特征向量迫零REZF或最大化信号泄露噪声比SLNR确定所述第一小区的第一发射权值。
第二方面，提供一种调度用户的确定装置，应用于数据传输系统的第一基站，所述第一基站包括至少两个天线，所述第一基站管理第一小区，所述装置包括：至少一个模块，用于执行上述第一方面所提供的调度用户的确定方法。
第三方面，提供了一种度用户的确定装置，该装置包括：处理器、发射机和接收机，该处理器用于实现上述第一方面所提供的调度用户的确定方法。
第四方面，提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当该计算机可读存储介质在计算机上运行时，使得计算机执行上述第一方面所提供的调度 用户的确定方法。
第五方面，提供了一种包含指令的计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行上述第一方面所提供的调度用户的确定方法。
第六方面，提供了一种数据传输系统，包括：至少两个基站，所述至少两个基站包括所述第一基站，所述第一基站包括第二方面或第三方面所述的调度用户的确定装置。
综上所述，本发明实施例中，第一时刻第一基站在第一小区的用户中确定第二时刻的第一预调度用户后，在保证不调整第一小区和其关联邻区的发射权值的前提下，找到第二时刻最符合该发射权值且优先级最高的用户作为目标调度用户，避免实际调度时发射权值失效的情况，提高干扰避让的可靠性。
进一步的，本发明实施例中所提供的调度用户的确定方法，邻区可以指的是站间邻区，也可以是站内邻区，尤其在站间邻区交互时延较长的情景下能够有效避免实际调度时发射权值失效的情况。并且，本发明实施例采用两次调度的方式，使得数据传输系统可以进行整体的协同干扰管理，将调度过程与协同联合起来，克服了此前调度与协同各自为政的缺点。
附图说明
图1-1是本发明实施例提供的调度用户的确定方法所涉及的CBF原理示意图；
图1-2是本发明实施例提供的一种集中式网络架构的示意图；
图1-3是本发明实施例提供的一种分布式网络架构的示意图；
图1-4是本发明实施例提供的一种发射权值失效的示意场景图；
图2-1是本发明实施例提供的一种调度用户的确定方法的流程示意图；
图2-2是本发明实施例提供的一种判断第一预调度用户是否为CBF待调整用户的流程示意图；
图2-3是本发明实施例提供的一种根据每个用户在第二时刻的SINR，在第一小区的用户中筛选出第二时刻的目标调度用户的流程示意图；
图2-4是本发明实施例提供的另一种调度用户的确定方法的流程示意图；
图3-1是本发明实施例提供的一种调度用户的确定装置的结构示意图；
图3-2是本发明实施例提供的另一种调度用户的确定装置的结构示意图；
图3-3是本发明实施例提供的又一种调度用户的确定装置的结构示意图；
图4是本发明实施例提供的再一种调度用户的确定装置的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
请参考图1-1，图1-1是本发明实施例提供的调度用户的确定方法所涉及的CBF原理示意图，图1-1的左右两侧分别为CBF执行前和执行后该调度用户的确定方法所涉及的数据传输系统的下行信号发送情况示意图，如图1-1所示，假设该数据传输系统包括两个小区，该两个小区为小区A和小区B，如图1-1左侧所示，假设两个小区在相同时频资源上各自服务一个用户，其中小区A服务第一用户01，相应的权值向量为
Figure PCTCN2017080257-appb-000003
小区B服务第二用 户02，相应的权值向量为ω2，由图1-1可知，CBF执行前，小区A对于第一用户01的下行信号的发送方向对准第二用户02，因此下行信号对小区B中的第二用户02干扰较大；如图1-1右侧所示，采用CBF技术进行权值向量调整后，小区A服务第一用户01，相应的权值向量调整为
Figure PCTCN2017080257-appb-000004
小区B服务第二用户02，相应的权值向量不变，仍为ω2，由图1-1可知，CBF执行后，权值向量相应调整，由于小区A对于第一用户01的下行信号的发送方向较调整前偏离第二用户02，因此，信号干扰减弱。
需要说明的是，根据基带处理单元(英文：Building BasebandUnit，简称：BBU)的部署方式的不同，上述数据传输系统包括两种网络架构，分别是如图1-2所示的集中式网络架构(也即是BBU集中部署)和如图1-3所示的分布式网络架构(也即是BBU分散部署)，如图1-2所示，该集中式网络架构包括多个射频拉远单元(英文：Remote Radio Unit，简称：RRU)和BBU。每个RRU构成一个小区，多个RRU分别处于不同的地理位置，他们与各自的BBU通过光纤等连接组件进行连接，但是BBU处于相同的地理位置。图1-2假设BBU共4个，分别为BBU0至BBU3，RRU共7个，分别为RRU0至RRU6，其中，BBU0至BBU3集中部署，RRU0至RRU6分散部署，由于RRU2至RRU4部署的位置较近，三者也可以视为集中部署，BBU0与RRU0连接，BBU1与RRU1连接，BBU2与RRU2至RRU4连接，BBU3分别与RRU5和RRU6连接。由于BBU是集中部署的，BBU之间的传输距离较短，因此BBU之间的交互，无论是同步、交互时延和交互带宽均十分理想。需要说明的是，图1-2的网络架构只是示意性说明，本发明实施例对集中式网络架构的具体架构不作限定。
如图1-3所示，该分散式网络架构包括多个RRU和BBU。每个RRU构成一个小区，多个RRU分别处于不同的地理位置，且属于同一小区的RRU和BBU就近部署，不同小区间BBU处于不同的地理位置，且通过主干网络进行信号传输。图1-3假设BBU共n+1个，n≥0，分别为BBU0至BBU n，RRU共n+1个，分别为RRU0至RRU n，其中，n+1个BBU分散部署，n+1个BBU与n+1个RRU一一对应连接。由于BBU是分散部署的，BBU之间的信号需要通过主干网络进行长距离的传输，因此BBU之间的交互时延较大，邻区的调度信息以及基站到邻区用户的信道等信息均无法实时获得。需要说明的是，图1-3的网络架构只是示意性说明，本发明实施例对分散式网络架构的具体架构不作限定。
为了实现干扰避让，各小区需要知道邻区的调度信息以及基站到邻区中用户的信道等相关信息以进行相应的权值调整，请参考图1-1，现有的CBF实现过程中，假设：小区A在完成第一子帧的调度后，就可以知道小区B(小区A的邻区)在第一子帧的调度结果以及小区B在第一子帧的调度用户到小区A的信道状态信息(英文：Channel State Information，简称：CSI)信息。要满足这个假设条件，CBF就需要在集中式架构的网络系统中执行，所有小区的BBU需要处于相同地理位置，以保证BBU之间有十分理想的回程线路(英文：Backhaul)时延和带宽。
而现有LTE通信网络通常是分布式部署的，BBU处于不同的地理位置。要实现集中式架构部署对现有网络的改造成本巨大，即使在新建的网络系统中采用集中式网络架构，RRU与BBU之间通常也需要大规模高性能的光纤连接，建造成本依然较高。从上述分析可知，CBF在集中式架构系统中虽然容易实现，但成本太高。而在目前的分布式网络架构下，由于站间邻区的信号传输时延较大，而干扰避让对实时性的要求较高，目前为了减少时延对 信号准确性的影响，在分布式网络架构的数据传输系统中，通常采用预调度的方式提前告知服务小区其邻区在未来某一时刻的调度信息，也即是进行未来某一时刻的调度情况的预估，但在分布式网络架构下这种预调度方式通常准确性较低。
例如，各小区真实发送时刻的调度容易会发生变化，使得此前设计的发射权值失效。示例的，请参考图1-4，假设数据传输系统中包括3个小区，分别为小区0、小区1和小区2，对于小区0，假设采用预调度的方式在预调度时刻预期数据传输系统中有3个用户会在同一时刻进行数据传输，该3个用户分别为UE_A，UE_B和UE_C，但是，在真实发送时刻(该真实发送时刻是预调度时刻之后的一个时刻)，可能出现小区0的邻区用户改变的情况，例如，真实发送时刻实际上是UE_A，UE_B和UE_D这3个用户进行数据传输，其中小区0的邻区：小区2中的用户由UE_C变为UE_D，此时，针对UE_A和UE_C获取的发射权值对于UE_D是失效的；也可能出现服务用户改变，例如，真实发送时刻实际上是UE_E，UE_B和UE_D这3个用户进行数据传输，其中小区0的邻区：小区2中的用户由UE_C变为UE_D，小区0的服务用户由UE_A变为UE_E，此时，针对UE_A获取的发射权值对于UE_E是失效的。产生这种现象的原因主要归咎于目前的调度方案只追求小区内的比例公平(英文：proportional fair，简称：PF)原则，而不考虑小区间的协作。导致容易出现在实际调度时刻发射权值失效的情况，因此，在分布式网络架构下，目前的干扰避让的可靠性较差。
为了解决目前存在的问题，本发明实施例提供一种调度用户的确定方法，应用于数据传输系统的第一基站，该第一基站包括至少两个天线，第一基站管理第一小区，该小区可以参考上述图1-1所示的小区A，如图2-1所示，方法包括：
步骤201、在第一时刻，第一基站在第一小区的用户中确定第二时刻的第一预调度用户，第二时刻在第一时刻之后。
实际应用中，第二调度时刻和第一调度时刻可以根据数据传输系统的具体网络架构来预先设定，例如两者间隔至少4个时隙，或者间隔至少8个时隙。
可选的，在第一时刻，可以采用PF算法在第一小区的用户中确定第二时刻的第一预调度用户。该PF算法可以为最大比例公平获取(英文：Max PF Gain)算法。其中，Max PF Gain算法的原理如下：第一小区获取调度瞬时信道质量和历史平均信道质量比值最大的用户，其中，瞬时信道质量可以通过用户的在第二时刻的待调度频谱资源的频谱效率反映，历史平均信道质量可以通过用户的在第二时刻的前一时刻之前的数据传输总量反映，该数据传输总量的单位通常为比特(英文：bit)，则用户在第二时刻的前一时刻之前的数据传输总量也即是用户在第二时刻的前一时刻之前传输的总比特数。示例的，可以根据PF公式来确定第一预调度用户，假设第二时刻传输的子帧为f，满足PF原则的第一预调度用户p可以满足如下PF公式：
Figure PCTCN2017080257-appb-000005
其中，Ek(f)是用户k在子帧f上的待调度频谱资源的频谱效率，1≤k≤K，其中，K为小区中的用户总数，Tk(f)是用户k在子帧f及子帧f之前的子帧内的数据传输总量，
Figure PCTCN2017080257-appb-000006
表示取用户1至用户K中的最大值。
可选的，传统的获取用户k的Ek(f)的过程包括：根据用户k在子帧f的信道质量指示(英文：Channel Quality Indicator，简称：CQI)，计算得到对应的调制和编码方案(英文：Channel State Information，简称：MCS)，再根据该MCS确定频谱效率Ek(f)，其中，该CQI是用户k测量并上报给第一基站的。
可选的，获取用户k的Tk(f-1)的过程包括：根据历史平均信道质量计算公式计算用户k的历史平均信道质量Tk(f-1)，该历史平均信道质量计算公式为：
Figure PCTCN2017080257-appb-000007
其中，q为第f-1子帧的调度用户，k＝q，指的是用户k在第f-1子帧是调度用户，k≠q指的是用户k在第f-1子帧不是调度用户，α是预设的滤波系数，(0<α<1)。Bk(f-1)为用户k在子帧f-1的传输块大小(英文：Transportblock size，简称：TBS)，即该MCS下每个资源块(英文：resource block；简称：RB)的对应传输比特数。
需要说明的是，该历史平均信道质量计算公式实质上是将如下公式的f替换为f-1，该公式中的各参数的含义可以参考上述历史平均信道质量计算公式。
Figure PCTCN2017080257-appb-000008
实际应用中，在首次进行数据传输时，历史平均信道质量可以是一预设的初始值，也即是Tk(1)为一初始值，该初始值可以为基站的高层下发的。
步骤202、第一基站判断第一预调度用户是否为CBF待调整用户。当第一预调度用户是CBF待调整用户，执行步骤203，当第一预调度用户不是CBF待调整用户，执行步骤204。
在本发明实施例中，需要预先判断第一小区在第二时刻是否需要进行CBF权值调整，当第一小区在第二时刻的下行信号对邻区产生影响，则需要进行第一小区的CBF权值调整；当第一小区在第二时刻的下行信号不对邻区产生影响，则不需要进行第一小区的CBF权值调整。本发明实施例所谓的邻区可以包括站内邻区和/或站间邻区。
需要说明的是，在CBF权值调整过程中，根据小区的下行信号的干扰与被干扰的关系，用户可以分为至少两种类型，一种是CBF待调整用户，一种是CBF协作用户，小区针对该CBF待调整用户的下行信号对针对CBF协作用户的下行信号的干扰较大，也即是CBF待调整用户是满足预设条件的干扰小区中的用户，CBF协作用户是满足另一预设条件的被干扰用户，通过对小区针对CBF待调整用户的发射权值进行调整，能够减少对CBF协作用户的干扰。例如，在图1-1中，第一用户01为CBF待调整用户，第二用户02为CBF协作用户。
实际应用中，每个基站都会检测其管理的小区中的预调度用户是否为CBF待调整用户，以及检测其管理的小区中的预调度用户是否为CBF协作用户。在一些特殊情况下，一个用户既可以是CBF待调整用户也可以是CBF协作用户，也即是针对该用户的下行信号既干扰着针对某一用户的下行信号，又被针对另一用户的下行信号所干扰。
因此，如图2-2所示，判断第一预调度用户是否为CBF待调整用户的具体过程如下：
步骤2021、第一基站获取第一预调度用户的用户测量集。
该第一预调度用户的用户测量集用于记录干扰第一预调度用户的干扰源邻区，以及干扰源邻区的RSRP对第一预调度用户干扰程度。
首先，第一基站可以根据第一小区的邻区到第一预调度用户的参考信号接收功率(英文：Reference Signal ReceivingPower，简称：RSRP)来判断第一预调度用户是否为CBF候选用户，当该第一预调度用户为CBF候选用户时，为该第一预调度用户建立用户测量集。其中，RSRP通常是第一预调度用户测量并上报给第一基站的。在本发明实施例中，CBF候选用户为受到其他小区的干扰程度符合一定条件的用户，其可能成为CBF协作用户。
示例的，第一基站判断第一预调度用户是否为CBF候选用户的过程如下：
步骤2021a、第一基站获取第一预调度用户接收的第一预调度用户的所有邻区的RSRP总和ΣRSRPg，g为第一预调度用户的邻区总数。
步骤2021b、第一基站确定第一预调度用户的干扰总和，该干扰总和等于ΣRSRPg与第一预调度用户的自身底噪noise之和。
步骤2021c、第一基站将该第一预调度用户的所有邻区的RSRP进行降序排序(也即是由高到低排序)。
步骤2021d、第一基站根据排序后的所有邻区的RSRP确定第一预调度用户是否为CBF候选用户。
在一种可实现方式中，步骤2021d具体包括：
设置i＝1，执行以下步骤：
A、检测i的大小，执行步骤B或C；
B、若1≤i≤n，获取排序后的前i个RSRP之和，n为预设的检测次数阈值(通常由基站的上层预先下发)，执行步骤D；
C、若i>n，确定第一预调度用户不是CBF候选用户，结束动作；
D、判断前i个RSRP之和与干扰总和的比值是否大于预设的干扰噪声比值，执行步骤E或F；
E、当前i个RSRP之和与干扰总和的比值大于预设的干扰噪声比值，确定第一预调度用户是CBF候选用户，结束动作；
F、当前i个RSRP之和与干扰总和的比值不大于预设的干扰噪声比值，更新i，使得更新后的i＝i+1，重复执行步骤A-F。
假设第一小区有3个邻区，假设预设的检测次数阈值为2，则第一基站获取第一预调度用户接收的第一预调度用户的所有邻区的RSRP总和ΣRSRP3；并确定第一预调度用户的干扰总和，该干扰总和等于ΣRSRP3与第一预调度用户的自身底噪noise之和；将该第一预调度用户的3个邻区的RSRP进行降序排序；之后，判断RSRP1是否满足公式1：
Figure PCTCN2017080257-appb-000009
其中，Threshold为预设的干扰噪声比值。
当RSRP1满足公式1，则确定第一预调度用户为CBF候选用户，当RSRP1不满足公式1，判断RSRP1+RSRP2是否满足公式2：
Figure PCTCN2017080257-appb-000010
其中，Threshold为预设的干扰噪声比值。
当RSRP1+RSRP2满足公式2，则确定第一预调度用户为CBF候选用户，当RSRP1+RSRP2不满足公式2，由于检测次数阈值为2，第一基站已经进行了2次检测，因此无需再计算RSRP1+RSRP2+RSRP3，可以确定第一预调度用户不为CBF候选用户。
其次，当第一预调度用户为CBF候选用户时，为第一预调度用户建立用户测量集。
在本发明实施例中，假设第一预调度用户为CBF候选用户，则第一基站为该第一预调度用户建立用户测量集，该第一预调度用户的用户测量集用于记录干扰第一预调度用户的干扰源邻区，以及干扰源邻区的RSRP对第一预调度用户干扰程度。该干扰程度可以由上述干扰源邻区d的占比反映，具体为：
Figure PCTCN2017080257-appb-000011
该占比也可以称为干扰占比。
例如，假设第一预调度用户受到2个干扰源邻区的干扰，预设的干扰噪声比值为70％，则第一预调度用户的用户测量集如表1所示，第一小区的小区号为1，第一预调度用户的标识为3，其主干扰小区为小区3，主干扰小区的RSRP占比为40％，次干扰小区的RSRP占比为30％，由此可知，UE3受到两个邻区的干扰，两个邻区分别为干扰占比为40％的小区3，以及干扰占比为30％的小区2，两者的干扰占比之和大于干扰噪声比值70％。
表1
小区号 UE的标识 主干扰小区 次干扰小区
1 3 Cell3，40％ Cell2，30％
实际应用中，无论第一预调度用户是否为CBF候选用户，第一基站也可以为该第一预调度用户建立第一预调度用户的用户测量集，第一基站可以在该用户测量集记录该第一预调度用户是否为CBF候选用户，例如，该第一预调度用户的用户测量集如表2所示，该表格记录了UE3为CBF候选用户，其他内容可以参考表1。
表2
Figure PCTCN2017080257-appb-000012
需要说明的是，当第一预调度用户的用户测量集如表1所示时，可以默认该表1中记载的预调度用户为CBF候选用户，无需添加指示预调度用户是否为CBF候选用户的项目，减少了用户测量集的内容，相应的简化了后续小区间交互的信息的内容。
步骤2022、第一基站接收第三小区所属第三基站发送的预调度信息，该预调度信息包括：第三预调度用户的用户测量集。
其中，该第三预调度用户为第三基站在第一时刻确定的第二时刻的预调度用户，第三预调度用户的用户测量集用于记录干扰该第三预调度用户的干扰源邻区，以及干扰源邻区的RSRP对第三预调度用户干扰程度。该第三小区为第一小区的邻区中被所述第一小区干扰的小区或第一小区的所有邻区。
在本发明实施例中，数据传输系统中各个基站都会进行自身管理的小区内的用户预调度，因此，第三小区作为第一小区的邻区，其对应的基站也会进行预调度，也即是在第一时刻，第三基站在第三小区的用户中确定第二时刻的第三预调度用户，该过程可以参考上述步骤201，本发明实施例对此不作赘述。
在第三基站确定了第三预调度用户后，可以获取第三预调度用户的用户测量集，该用户测量集的获取过程可以参考上述步骤2021，本发明实施例对此不作限定。
在本发明实施例中，邻区间用户测量集的交互至少存在两种情况，一种情况是被干扰小区将其预调度用户的用户测量集传输给干扰源小区，此时，被干扰小区中的预调度用户也即是上述CBF候选用户，另一种情况是任意两个邻区均进行用户测量集的交互。
相应的，上述第三小区可以泛指一类小区，该第三小区可以为第一小区的邻区中被第一小区干扰的小区，也可以为第一小区的所有邻区。
第三基站在获取第三预调度用户的用户测量集后，将该第三预调度用户的用户测量集发送至第一基站，以便于第一基站根据第一预调度用户的用户测量集和第三预调度用户的用户测量集，确定第三预调度用户是否为CBF待调整用户。
示例的，在上述第二种情况中，假设小区3中用户19和小区5中的用户39都受到了小区1的干扰，则小区3所属的基站和小区5所属的基站都为第三基站，则第三基站发来的第三预调度用户的用户测量集分别可以参考表3和表4。
表3
小区号 UE的标识 主干扰小区 次干扰小区
3 19 Cell1，63％ Cell7，26％
表4
小区号 UE的标识 主干扰小区 次干扰小区
5 39 Cell8，43％ Cell1，40％
同理，当第一预调度用户为CBF候选用户，则第一小区为被干扰小区，在上述第一种情况中，第一基站可以通过预调度信息把第一预调度用户的用户测量集发送给所有邻区所属基站，也即是第三基站；在上述第二种情况中，第一基站也可以通过预调度信息将第一预调度用户的用户测量集发送至第一预调度用户的干扰源小区所属基站，例如，请参考表1，第一预调度用户的干扰邻区为小区2和小区3，则第一基站将第一预调度用户的用户测量集发送至小区2和小区3所属基站。第一基站的动作可以参考第三基站，本发明实施例对此不作赘述。
步骤2023、第一基站根据第一预调度用户的用户测量集和第三预调度用户的用户测量 集，确定第一预调度用户是否为CBF待调整用户。
在本发明实施例中，第一基站可以根据第一预调度用户的用户测量集和第三预调度用户的用户测量集建立整体用户测量集，该整体用户测量集用于记录干扰目标预调度用户的干扰源邻区，以及干扰源邻区的RSRP对目标预调度用户的干扰程度。
依据上述步骤2022的第一种情况可知，目标预调度用户可以是第一小区以及所有受第一小区干扰的邻区中的用户，依据上述步骤2022的第二种情况可知，目标预调度用户也可以是第一小区以及第一小区的所有邻区中的用户。
示例的，依据上述步骤2022的第一种情况可知，假设该整体用户测量集可以如表5所示。需要说明的是，表5中的备注项目中的内容用于解释各个用户测量集，实际应用中，整体用户测量集中可以不携带该备注项目，进一步的，该整体用户测量集可以包含指示预调度用户是否为CBF候选用户的项目，相应的，其每一行内容可以参考上述表2，此时，第一基站可以根据整体用户测量集中“预调度用户是否为CBF候选用户”这一项目中的内容，确定哪些小区中的预调度用户是CBF候选用户，也即是确定哪些小区为第一小区的邻区中被第一小区干扰的小区。实际应用中，由于第一小区的邻区可以有很多，本发明实施例中表5只是以第一小区有4个邻区为例进行说明，也即是表5记录了5个小区中的预调度用户的用户测量集。
表5
Figure PCTCN2017080257-appb-000013
示例的，依据上述步骤2022的第二种情况可知，假设该整体用户测量集可以如表6所示。需要说明的是，表6中的备注项目中的内容用于解释各个用户测量集，实际应用中，整体用户测量集中可以不携带该备注项目，进一步的，该整体用户测量集可以包含指示预 调度用户是否为CBF候选用户的项目，相应的，其每一行内容可以参考上述表2。实际应用中，由于被第一小区干扰的邻区可以有很多，本发明实施例中表6只是以第一小区有2个被干扰的邻区为例进行说明，也即是表6记录了3个小区中的预调度用户的用户测量集。
表6
Figure PCTCN2017080257-appb-000014
依据上述步骤2022、2023以及表5和表6可知，采用第二种情况所提供的用户测量集的传输方式，可以减少用户测量集的传输次数，降低建立整体用户测量集的复杂度，因此，实际应用中通常采用第二种情况所提供的用户测量集的传输方式。
进一步的，第一基站还可以根据上述整体用户测量集，确定第一预调度用户为CBF待调整用户。
具体的，第一基站根据第一小区的小区号查询该整体用户测量集中是否存在该第一小区作为干扰源小区(具体可以查询上述表5或表6中的主干扰小区和次干扰小区)，若整体用户测量集中不存在该第一小区作为干扰源小区，则确定该第一小区中的第一预调度用户不为CBF待调整用户；若整体用户测量集中存在该第一小区作为干扰源小区，则确定该第一小区中的第一预调度用户为CBF待调整用户。
需要说明的是，上述预调度信息的交互过程可以通过回程线路实现。回程线路又称回程链路，是指从接入网络或者小区站点(英文：cellsite)到交换中心的连接。交换中心连接至骨干网络，而骨干网络连接至核心网络。因而，回程线路是任何电信网络结构的中间层，它位于接入网络和骨干网络之间，为这两个网络提供了重要连接。
步骤203、第一基站确定CBF权值调整后的第一发射权值。执行步骤205。
需要说明的是，上述步骤2022中，第三基站发送的预调度信息还可以包括第三预调度用户的CSI。该CSI可以包括：预编码矩阵的行列数(英文：Precoding Matrix Indicator，简称：PMI)，CQI和流数(等于预编码矩阵的秩)等信息。
相应的，确定第一小区的第一发射权值的过程可以包括：
步骤X1、当第一预调度用户为CBF待调整用户，从第三预调度用户的CSI中获取CBF协作用户的CSI。
当第一预调度用户是CBF待调整用户，说明第一小区需要进行第二时刻的发射权值调 整，也即进行CBF权值调整，而CBF权值调整需要确定第一小区的CBF协作用户，通过与CBF协作用户的协作才能实现CBF权值调整。该第一小区的CBF协作用户为受到第一小区干扰且符合预设筛选条件的用户，该预设筛选条件为受受害干扰程度最高的n0个用户，也即是CBF协作用户为第一基站确定的第三预调度用户中受第一小区干扰的最严重的前n0个用户，该n0为第一小区能够协调的用户个数阈值，实际应用中，n0＝n1-n2，该n1为第一小区的可协作用户阈值n1，等于第一小区的发射天线数量，n2是第一小区在第二时刻服务的流数，等于第一预调度用户的接收天线的数量。
则根据上述步骤202中提供的整体用户测量集，第一基站可以确定第一小区的CBF协作用户。示例的，上述确定第一小区的CBF协作用户的过程，具体包括：根据第一小区的可协作用户阈值n1以及第一小区在第二时刻服务的流数n2在整体用户测量集中选择受干扰程度最高的n1-n2个用户作为第一小区的CBF协作用户，上述受干扰程度与干扰占比正相关，也即是第一小区对受干扰用户的干扰占比越高，该受干扰用户的受害程度越高。
示例的，假设n1＝4，n2＝1，则n0＝3，若第一小区的受干扰用户超过3个，则根据表5或表6将第一小区对受干扰用户的干扰占比最高的前3个待调度用户作为第一小区的CBF协作用户，也即是第一基站在只能针对3个CBF协作用户进行第二时刻下行信号发射权值的调整，以减少下行信号对该3个CBF协作用户的影响。
若第一小区的受干扰用户未超过3个，则将第一小区的受干扰用户确定为第一小区的CBF协作用户。请参考表5或表6，则第一小区(即小区1)的受干扰用户分别为用户19(小区1对其相应的干扰占比为63％)和用户39(小区1对其相应的干扰占比为40％)，则将预调度用户19和39作为CBF协作用户。
需要说明的是，第一基站m还可以建立CoMP协作用户集Um，该Um包括第一小区的预调度用户和第一小区的CBF协作用户。例如，第一小区m内的预调度用户为
Figure PCTCN2017080257-appb-000015
(N1为第二时刻第一小区内第一预调度用户的个数，若有多个第一预调度用户，则N1>1，若有1个第一预调度用户，则N1＝1)，第一小区的CBF协作用户为
Figure PCTCN2017080257-appb-000016
N2为第一小区的CBF协作用户的个数，则
Figure PCTCN2017080257-appb-000017
为CoMP协作用户集。
步骤X2、根据第一预调度用户的CSI和CBF协作用户的CSI，采用特征向量迫零(英文：Eigenvector Zero Forcing，简称：EZF)、正则化特征向量迫零(英文：Regularized Eigenvector Zero Forcing，简称：REZF)或最大化信号泄露噪声比(英文：Signal to Leakage plus Noise Ratio，简称：SLNR)确定第一小区的第一发射权值。
常用的CBF权值调整算法有EZF、REZF、SLNR等，本发明实施例以以下几种可实现方式进行说明：
第一种可实现方式，根据第一预调度用户的CSI和第二预调度用户的CSI，采用EZF确定第一小区在第二时刻的联合信道矩阵，并根据该联合信道矩阵确定第一小区的第一发射权值。
EZF算法的原理是：对第一小区m内的预调度用户
Figure PCTCN2017080257-appb-000018
(N1为第二时刻第一小区内第一预调度用户的个数，若有多个第一预调度用户，则N1>1，若有1个第一预调度用户，则N1＝1)，使第一预调度用户
Figure PCTCN2017080257-appb-000019
中每个用户的发送信号与第一小区的CBF协作用户
Figure PCTCN2017080257-appb-000020
(也即是第二预调度用户)的信道特征方向正交。
通过小区间的信息交互的CSI，可获得第一基站到第一预调度用户以及到第二预调度用户的PMI，将PMI对应的特性向量(也称本征向量)作为对下行信道的重构，用于CBF权值计算。假设输入参数为各预调度用户的特征向量{Vu|u∈Um}，其中，
Figure PCTCN2017080257-appb-000021
则构造的EZF联合信道矩阵为：
Figure PCTCN2017080257-appb-000022
则第一小区m内的配对用户的权值矩阵为：
W＝HH*(H*HH)-1*diag(β)；
也即是：
Figure PCTCN2017080257-appb-000023
需要说明的是，实际使用的权值矩阵Wuse满足：
Figure PCTCN2017080257-appb-000024
其中，
Figure PCTCN2017080257-appb-000025
至
Figure PCTCN2017080257-appb-000026
以及
Figure PCTCN2017080257-appb-000027
至
Figure PCTCN2017080257-appb-000028
分别是T*1的列向量，模值归一；wa1至
Figure PCTCN2017080257-appb-000029
以及wb1至
Figure PCTCN2017080257-appb-000030
分别是T*1的列向量，模值归
Figure PCTCN2017080257-appb-000031
N1为第二时刻第一小区内第一预调度用户的个数，当N1>1时，
Figure PCTCN2017080257-appb-000032
是为了保证总功率归一的数值，T为第一小区m的发射天线数量，右上角的“H”表示求共轭转置矩阵，右上角的“-1”表示求逆矩阵，diag(β)是对角阵，用于将矩阵归一化，可以认为是列向量的归一化因子。示例的，假设第一小区是8T小区，也即是T＝8，有8个发射天线，则wa1是8*1的列向量。
假设第一小区内的各个第一预调度用户的流数分别为
Figure PCTCN2017080257-appb-000033
总流数为L，现在计算第一小区需要多少发送流数，即空间维度。相应地，在Wuse里挑选需要的数量，CBF方案中只从Wuse中选取前L个列向量作为针对该第一小区的第一预调度用户的信号发射的权值向量，也即是在Wuse中选取前L个列向量作为第一小区的第一发射权值。
第二种可实现方式，根据第一预调度用户的CSI和第二预调度用户的CSI，采用REZF确定第一小区在第二时刻的联合信道矩阵，并根据该联合信道矩阵确定第一小区的第一发射权值。
REZF算法的目的在于兼顾有效信号和干扰避让，在保证这两个目的的前提下寻找折中的联合信道矩阵W。与EZF相比公式修改为：
W＝HH*(H*HH+diag(α))-1*diag(β)；
也即是：
Figure PCTCN2017080257-appb-000034
需要说明的是，实际使用的权值矩阵Wuse满足：
Figure PCTCN2017080257-appb-000035
其中，
Figure PCTCN2017080257-appb-000036
至
Figure PCTCN2017080257-appb-000037
以及
Figure PCTCN2017080257-appb-000038
至
Figure PCTCN2017080257-appb-000039
分别是T*1的列向量，模值归一；wa1至
Figure PCTCN2017080257-appb-000040
以及wb1至
Figure PCTCN2017080257-appb-000041
分别是T*1的列向量，模值归
Figure PCTCN2017080257-appb-000042
T为第一小区发射天线的数量，N1为第二时刻第一小区内第一预调度用户的个数，当N1>1时，
Figure PCTCN2017080257-appb-000043
是为了保证总功率归一的数值，T为第一小区m的发射天线数量，右上角的H表示求共轭转置矩阵，右上角的“-1”表示求逆矩阵，diag(α)为一个对角阵，diag(α)的维度为H的总层数，diag(α)的秩为L，其元素为
Figure PCTCN2017080257-appb-000044
右乘的对角阵diag(β)是为了将小区权值矩阵的每一列功率归一化，diag(β)的对角线上的第v个元素为矩阵H(k)H*(H(k)*H(k)H+diag(α))-1的第v列向量的模的倒数。假设第一小区内的各个第一预调度用户的流数分别为
Figure PCTCN2017080257-appb-000045
总流数为L，现在计算第一小区需要多少发送流数，即空间维度。相应地，在Wuse里挑选需要的数量，CBF方案中只从Wuse中选取前L个列向量作为针对该第一小区的第一预调度用户的信号发射的权值向量，也即是在Wuse中选取前L个列向量作为第一小区的第一发射权值。
第三种可实现方式，根据第一预调度用户的CSI和第二预调度用户的CSI，采用SLNR确定第一小区在第二时刻的联合信道矩阵，并根据该联合信道矩阵确定第一小区的第一发射权值。
SLNR算法的原理是：对第一小区m内的第一预调度用户
Figure PCTCN2017080257-appb-000046
(N1为第二时刻第一小区内第一预调度用户的个数，若有多个第一预调度用户，则N1>1，若有1个第一预调度用户，则N1＝1)，最大化该第一预调度用户的信号接收功率与该第一小区的CBF协作用户
Figure PCTCN2017080257-appb-000047
的干扰泄露功率之比。也就是说其权值生成约束条件是实现信号功率相对于泄露到第一小区的CBF协作用户所在小区的信号功率及噪声最大化，从而使权值能够兼容解决对第一小区的CBF协作用户所在小区的泄露问题以及第一预调度用户的信噪比问题。
相应的，最大SLNR权值是下述矩阵VDV-1的最大特征值对应的特征向量W：
Figure PCTCN2017080257-appb-000048
也即是：
Figure PCTCN2017080257-appb-000049
需要说明的是，实际使用的权值矩阵Wuse满足：
Figure PCTCN2017080257-appb-000050
其中，
Figure PCTCN2017080257-appb-000051
至
Figure PCTCN2017080257-appb-000052
以及
Figure PCTCN2017080257-appb-000053
至
Figure PCTCN2017080257-appb-000054
分别是T*1的列向量，模值归一；wa1至
Figure PCTCN2017080257-appb-000055
以及wb1至
Figure PCTCN2017080257-appb-000056
分别是T*1的列向量，模值归
Figure PCTCN2017080257-appb-000057
T为第一小区发射天线的数量，N1为第二时刻第一小区内第一预调度用户的个数，当N1>1时，
Figure PCTCN2017080257-appb-000058
是为了保证总功率归一的数值，T为第一小区m的发射天线数量，
Figure PCTCN2017080257-appb-000059
为第一预调度用户av进行CBF前的总的接收噪声功率，1≤v≤N1，NR为第一预调度用户av的接收天线数量，
Figure PCTCN2017080257-appb-000060
为第一预调度用户av中每根接收天线的平均噪声功率。
Figure PCTCN2017080257-appb-000061
为第一小区对第一预调度用户av的每一流的发射功率(也即是
Figure PCTCN2017080257-appb-000062
为第一预调度用户av的每一流的平均发射功率)，
Figure PCTCN2017080257-appb-000063
为第一小区到第一预调度用户av的信道的相关矩阵，Ru为第一小区到第一小区的CBF协作用户
Figure PCTCN2017080257-appb-000064
的信道的相关矩阵，
Figure PCTCN2017080257-appb-000065
表示用户av的秩，此处秩＝1，t为第一基站的第一小区的发射天线数。则wav便是矩阵V中对应于最大
Figure PCTCN2017080257-appb-000066
个特征值的那列向量。
假设第一小区内的各个第一预调度用户的流数分别为
Figure PCTCN2017080257-appb-000067
总流数为L，现在计算第一小区需要多少发送流数，即空间维度。相应地，在Wuse里挑选需要的数量，CBF方案中只从Wuse中选取前L个列向量作为针对该第一小区的第一预调度用户的信号发射的权值向量，也即是在Wuse中选取前L个列向量作为第一小区的第一发射权值。
本发明实施例中，CBF权值调整是相对于传统的发射权值而言的，该传统的发射权值的确定过程可以参考后述步骤204的确定方法。
步骤204、第一基站按照传统技术确定第一小区在第二时刻的第一发射权值。执行步骤205。
实际应用中，第一基站可以先按照传统技术计算第一小区在第二时刻的第一发送权值，例如按照标准3GPP36.211-3GPP36.213中的内容计算第一小区在第二时刻的第一发送权值。该第一发送权值是根据第一预调度用户上报的CQI计算得到的，通常情况下，第一发送权值在上述步骤201所对应的第一次预调度过程中计算得到。
步骤205、第一基站接收数据传输系统中第二小区所属的第二基站发送的在第二时刻的第二发射权值。
在本发明实施例中，每个基站都会进行自身管理的小区在第二时刻的发射权值确定，发射权值的确定方式可以参考上述步骤203或204，本发明实施例对此不作赘述。
并且，每个基站会计算得到的发射权值发送给关联的邻区，示例的，第一基站接收数据传输系统中第二小区所属的第二基站发送的在第二时刻的第二发射权值，在本发明实施例中，第二小区是第一小区的关联邻区，其包括第一小区的邻区中符合预设交互条件的邻区，该预设交互条件是根据具体传输场景所定义的。
一方面，第一小区的邻区中符合预设交互条件的邻区可以为在预设时长内第一基站向其发送过用户测量集的基站，也即是第二基站包括预设时长内第一基站向其发送过用户测量集的基站。该预设时长大于或等于第一时刻与第二时刻的间隔时长。可选的，该预设时长可以为8个时隙。在这种场景中，第一基站会接收到其之前发送过第一预调度用户的用户测量集的基站所发送的发射权值，也即是，第一基站确定的曾经或者当前对第一预调度 用户产生干扰的源干扰小区所属基站均会向第一基站反馈其在第二时刻的发射权值。
相应的，在确定第一小区在第二时刻的第一发射权值之后，第一基站可以向关联邻区所属基站发送第一发射权值，该关联邻区所属基站为预设时长内向第一基站发送过用户测量集的基站。
具体的，当第一预调度用户为CBF待调整用户，向关联邻区所属基站发送第一发射权值，第一发射权值为CBF权值调整后的权值，即为步骤203中所确定的第一权值。
当第一预调度用户不为CBF待调整用户，向关联邻区所属基站发送第一发射权值，第一发射权值为未进行CBF权值调整的权值，即为步骤204中所确定的第一权值。
另一方面，第一小区的邻区中符合预设交互条件的邻区可以为第一小区的所有邻区，也即是第二小区包括第一小区的所有邻区。在这种场景中，第一基站会接收到其所有邻区所属基站所发送的发射权值，也即是，第一基站的邻区所属基站均会向第一基站反馈其在第二时刻的发射权值。
相应的，在确定第一小区在第二时刻的第一发射权值之后，第一基站可以向第一小区的所有邻区所属基站发送第一发射权值，由于在这种场景中第二小区为第一小区的所有邻区，则第一基站可以向第二基站发送第一发射权值。
具体的，当第一预调度用户不为CBF待调整用户，向第二基站发送第一发射权值，第一发射权值为未进行CBF权值调整的权值，即为步骤203中所确定的第一权值。
当第一预调度用户为CBF待调整用户，向第二基站发送第一发射权值，第一发射权值为CBF权值调整后的权值，即为步骤204中所确定的第一权值。
步骤206、第一基站根据第一发射权值和第二发射权值，计算第一小区中每个用户的信干噪比(英文：Singal-to-Interference plus Noise Ratio，简称：SINR)。
需要说明的是，数据传输系统为时分双工(英文：Time Division Duplexing；简称：TDD)系统或频分双工(Frequency Division Duplexing，简称：FDD)系统时，其第一用户的SINR的计算方法不同。本发明实施例以以下两种可实现方式为例进行说明：
在第一种可实现方式中，当数据传输系统为TDD系统时，根据第一发射权值和第二发射权值，计算第一小区中每个用户在第二时刻的信干噪比SINR的过程，包括：
根据第一发射权值和第二发射权值，采用第一信噪比计算公式，计算第一用户k在第二时刻的SINR，第一信噪比计算公式为：
Figure PCTCN2017080257-appb-000068
其中，第一用户k为第二时刻第一小区的任一用户，SINRk，l为第一用户k的第l流在第二时刻的SINR，Hi,k为第一基站i到第一用户k的信道，y为第一用户k的目标邻区，该目标邻区为第二小区中第一用户k可测量到的邻区中一个，也即是给第一小区发送过权值的小区中第一用户k能够测量到的邻区，Hy,k为目标邻区y到第一用户k的信道，noise为第一用户的自身底噪，Y为第二小区中第一用户k可测量到的邻区的总数，wy,f为目标邻区y的第f流在第二时刻的发射权值，Fy为目标邻区y在第二时刻的总发射流数。
由上可知，在TDD系统中，小区中任一用户的SINR正相关于其信道与发射权值的乘积，负相关于其能够测量到的邻区的信道与发射权值的乘积，通过上述第一信噪比计算公 式所计算得到的SINR相较于根据用户上报的CQI所确定的SINR更为准确。
在第二种可实现方式中，当数据传输系统为FDD系统时，根据第一发射权值和第二发射权值，计算第一小区中每个用户在第二时刻的信干噪比SINR的过程，包括：
根据第一发射权值和第二发射权值，采用第二信噪比计算公式，计算第一用户k在第二时刻的SINR，第二信噪比计算公式为：
Figure PCTCN2017080257-appb-000069
其中，第一用户k为第二时刻第一小区的任一用户，SINRk，l为第一用户k的第l流在第二时刻的SINR，RSRPk,i为在第二时刻第一用户k测量到的第一小区i到第一用户的SINR，H表示求矩阵的共轭转置，y为第一用户k的目标邻区，该目标邻区为第二小区中第一用户k可测量到的邻区中一个，RSRPk,y为在第二时刻第一用户k测量到的目标邻区y到第一用户k的RSRP，Y为第二小区中第一用户k可测量到的邻区的总数，Fy为目标邻区y在第二时刻的总发射流数，wy,f为目标邻区y的第f流在第二时刻的发射权值，wk,y用于表征目标邻区y到第一用户k的信道，wk,y的维度和wy,f的维度相同。
当第一小区在第一时刻至第二时刻之间进行过CBF权值调整，wk，SU,l为第一用户k的第l流在CBF权值调整前的发射权值，也即是该发射权值为上述步骤204所确定的第一发射权值，wk,CBF,l为第一用户k的第l流在CBF权值调整后的发射权值，也即是该发射权值为上述步骤203所确定的第一发射权值。
当第一小区在第一时刻至第二时刻之间未进行过协同波束赋形CBF权值调整，wk，SU,l等于wk,CBF,l，表示第一用户k的第l流在第二时刻的发射权值，也即是该发射权值为上述步骤204所确定的第一发射权值。此时上述第二信噪比计算公式可以调整为：
Figure PCTCN2017080257-appb-000070
需要说明的是，上述wk,y的维度可以由第一用户k按照第一用户k的流数为1进行测量并上报给第一基站的PMI对应的预编码矩阵的行列数来表征。
由上可知，在FDD系统中，小区中任一用户的SINR正相关于其信道与发射权值的乘积，也正相关于其RSRP，负相关于其能够测量到的邻区的信道与发射权值的乘积，也负相关于其能够测量到的邻区的RSRP，通过上述第一信噪比计算公式所计算得到的SINR相较于根据用户上报的CQI所确定的SINR更为准确。
步骤207、第一基站根据每个用户在第二时刻的信干噪比(英文：Singal-to-Interference plus Noise Ratio，简称：SINR)，在第一小区的用户中筛选出第二时刻的目标调度用户。
如图2-3所示，根据每个用户在第二时刻的SINR，在第一小区的用户中筛选出第二时刻的目标调度用户，包括：
步骤2071、第一基站根据每个用户在第二时刻的SINR，确定每个用户在第二时刻的MCS；
在本发明实施例中，根据SINR可以查询3GPP协议中预设表格得到MCS，本发明实施例对此不作赘述。
步骤2072、第一基站根据每个用户在第二时刻的MCS，确定每个用户在第二时刻的频谱效率；
在本发明实施例中，可以通过查表的方式，根据每个用户在第二时刻的MCS，确定每个用户在第二时刻的频谱效率。
步骤2073、第一基站根据每个用户在第二时刻的频谱效率，采用比例公平原则在第一小区中筛选第二时刻的目标调度用户。
请参考步骤201中的比例公平算法，在步骤2073中，除了每个用户在第二时刻的频谱效率的算法与步骤201中所提供的算法不同外，其他参数的算法与其提供的比例公平算法相同。
也即是，假设第二时刻传输的子帧为f，满足PF原则的用户p可以满足如下PF公式：
Figure PCTCN2017080257-appb-000071
其中，Ek(f)是用户k在子帧f上的待调度频谱资源的频谱效率，其采用上述步骤2071获取，1≤k≤K，其中，K为小区中的用户总数，Tk(f)是用户k在子帧f及子帧f之前子帧内的数据传输总量，
Figure PCTCN2017080257-appb-000072
表示取用户1至用户K的最大值。获取用户k的Tk(f-1)的过程参考上述步骤201，本发明实施例对此不再赘述。
上述Ek(f)与Tk(f-1)的比值最大的用户k即为第二时刻的目标调度用户。该目标调度用户是第二时刻最符合第一发射权值和第二发射权值且优先级最高的用户。
步骤208、在第二时刻，第一基站采用目标调度用户的MCS，向目标调度用户传输数据。
请参考步骤207中的步骤2071，由于目标调度用户的MCS在该步骤2071已确定，因此，可以直接获取该目标调度用户的MCS，在第二时刻，采用目标调度用户的MCS，向目标调度用户传输数据。此时采用的发射权值为步骤203所计算得到的第一发射权值，第二基站采用的发射权值是其在步骤205中发送的第二发射权值。
需要说明的是，在上述步骤204之后，当该用户不为CBF待调整用户时，第一基站也可以在第二时刻按照PF原则向目标调度用户传输数据。也即是采用步骤201所提供的比例公平算法所计算得到的MCS，在第二时刻向目标调度用户传输数据，此时采用的发射权值为步骤204所计算得到的第一发射权值，第二基站采用的发射权值是其在步骤205中发送的第二发射权值。
综上所述，本发明实施例中，第一时刻第一基站在第一小区的用户中确定第二时刻的第一预调度用户后，在保证不调整第一小区和其关联邻区的发射权值的前提下，找到第二时刻最符合该发射权值且优先级最高的用户作为目标调度用户，避免实际调度时发射权值失效的情况，提高干扰避让的可靠性。
进一步的，本发明实施例中所提供的调度用户的确定方法，邻区可以指的是站间邻区，也可以是站内邻区，尤其在站间邻区交互时延较长的情景下能够有效避免实际调度时发射权值失效的情况。并且，本发明实施例采用两次调度的方式，如上述步骤201所提供的第一次预调度过程以及步骤207提供的第二次预调度过程，使得数据传输系统可以进行整体的协同干扰管理，将调度过程与协同联合起来，克服了此前调度与协同各自为政的缺点。
需要说明的是，本发明实施例中，主要是以第一基站为例进行调度用户的确定方法的说明，实际应用中，在该数据传输系统中，各个基站均可以像上述第一基站一样，在一个预调度周期(也即是上述的第一时刻到第二时刻的时间段)中执行两次预调度过程，且相邻小区所属基站通常会有信息交互。示例的，请参考图2-4，本发明实施例以基站(英文：base station，简称：BS)01和BS02的交互为例进行说明，假设BS01服务的小区1中的用户包括UE011，BS02服务的小区2中的用户包括UE021，BS01和BS02可以广播信道状态信息-参考信号(英文：Channel State Information-Reference Signal，简称：CSI-RS)，UE011可以对BS01的CSI-RS回复CSI反馈(英文：feedback)，UE021可以对BS02的CSI-RS回复CSI反馈。BS01和BS02可以执行第一次预调度过程，具体可以参考上述步骤201，假设第一小区和第二邻区互为邻区或互为干扰小区，两者交互预调度信息，该预调度信息包括用户测量集以及CSI，具体可以参考上述步骤2022。第一基站和第二基站根据该接收到的预调度信息，判断是否进行CBF权值调整，然后根据判断结果确定第二时刻的发射权值。由于第一小区和第二邻区互为邻区，且第一小区和第二邻区在预设时长内也交互过用户测量集，所以两者符合步骤205所定义的关联邻区的关系，两者交互发射权值，该发射权值可以为CBF权值调整后的权值，具体可以参考步骤203所确定的权值，也可以为未进行CBF权值调整的权值，具体参考步骤204所确定的权值。第一基站和第二基站根据接收到的权值以及自身的权值进行第二次预调度过程，具体可以参考上述步骤207。假设经过第二次预调度过程，第一小区的目标调度用户为UE011，第二小区的目标调度用户为UE021，则BS01通过用户专用参考信号(英文：User equipment-reference signal，简称：UE-RS,又称DM-RS)向UE011传输确定的发射权值，并采用该发射权值进行调度；BS02通过UE-RS向UE021传输确定的发射权值，并采用该发射权值进行调度。
上述第一层预调度过程的目的是：由于各小区间的调度结果和CSI信息交互在分布式系统下存在回程线路时延，真实发送时刻(也即上述第二时刻)的那一帧时间内无法完成信息交互，因此需要采用预调度的方式，根据各小区当前时刻(也即上述第一时刻)的CSI信息预测未来某一真实发送时刻的调度用户(本发明实施例称为预调度用户)，小区间交互这个预调度结果和CSI信息，用于CBF的协同权值设计。
上述第二层预调度过程的目的是：在真实发送时刻，小区内用户业务状态可能与预调度时刻发生了变化(该场景可以参考图1-4中的场景)，不能保证预调度的结果依然适用于该小区。但本发明实施例又不希望再改变各小区的发射权值(在本发明实施例中，无论是否进行过CBF权值调整，各小区交互发射权值后，其发射权值不再调整)，破坏系统内的干扰管理。因此在权值不变的基础上，通过第二层预调度过程，寻找一个最匹配整个数据传输系统的既定发射权值(即在这个权值下优先级最高)的用户作为目标调度用户。这样会带来两个好处：1)发射权值设计后可能并不一定更契合原有的预调度用户，更合适的用户将会入选，成为目标调度用户；2)原来的预调度用户可能会因为网络变化或者用户移动而 消失，但替代者(也即是目标调度用户)是最贴近该预调度用户的；3)新的高优先级用户允许切入，但不会更改数据传输系统的发射权值，无需破坏此前全系统的干扰管理设计。
需要说明的是，本发明实施例提供的调度用户的确定方法步骤的先后顺序可以进行适当调整，步骤也可以根据情况进行相应增减，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化的方法，都应涵盖在本发明的保护范围之内，因此不再赘述。
本发明实施例提供一种调度用户的确定装置，应用于数据传输系统的第一基站，所述第一基站包括至少两个天线，所述第一基站管理第一小区，如图3-1所示，所述装置包括：
第一确定模块301，用于在第一时刻，在所述第一小区的用户中确定第二时刻的第一预调度用户，所述第二时刻在所述第一时刻之后；
第二确定模块302，用于确定所述第一小区在第二时刻的第一发射权值；
第一接收模块303，用于接收所述数据传输系统中第二小区所属的第二基站发送的在所述第二时刻的第二发射权值，所述第二小区包括所述第一小区的邻区中符合预设交互条件的邻区；
计算模块304，用于根据所述第一发射权值和所述第二发射权值，计算所述第一小区中每个用户在所述第二时刻的信干噪比SINR；
筛选模块305，用于根据每个用户在所述第二时刻的SINR，在所述第一小区的用户中筛选出所述第二时刻的目标调度用户。
综上所述，本发明实施例中，第一时刻第一确定模块在第一小区的用户中确定第二时刻的第一预调度用户后，在保证不调整第一小区和其关联邻区的发射权值的前提下，筛选模块找到第二时刻最符合该发射权值的用户作为目标调度用户，避免实际调度时发射权值失效的情况，提高干扰避让的可靠性。
在第一种可实现方式中，所述数据传输系统为时分双工TDD系统，
所述计算模块304，用于：
根据第一发射权值和第二发射权值，采用第一信噪比计算公式，计算第一用户k在第二时刻的SINR，所述第一信噪比计算公式为：
Figure PCTCN2017080257-appb-000073
其中，第一用户k为第二时刻所述第一小区的任一用户，SINRk，l为所述第一用户k的第l流在第二时刻的SINR，Hi,k为第一基站i到所述第一用户k的信道，所述y为所述第一用户k的目标邻区，所述目标邻区为所述第二小区中所述第一用户k可测量到的邻区中一个，Hy,k为所述目标邻区y到所述第一用户k的信道，所述noise为所述第一用户的自身底噪，所述Y为所述第二小区中所述第一用户k可测量到的邻区的总数，wy,f为所述目标邻区y的第f流在所述第二时刻的发射权值，Fy为所述目标邻区y在所述第二时刻的总发射流数。
第二种可实现方式中，所述数据传输系统为频分双工FDD系统，
所述计算模块304，用于：
根据第一发射权值和第二发射权值，采用第二信噪比计算公式，计算第一用户k在第二时刻的SINR，所述第二信噪比计算公式为：
Figure PCTCN2017080257-appb-000074
其中，第一用户k为第二时刻所述第一小区的任一用户，SINRk，l为所述第一用户k的第l流在第二时刻的SINR，RSRPk,i为在所述第二时刻所述第一用户k测量到的第一小区i到所述第一用户的SINR，H表示求矩阵的共轭转置，所述y为所述第一用户k的目标邻区，所述目标邻区为所述第二小区中所述第一用户k可测量到的邻区中一个，RSRPk,y为在所述第二时刻所述第一用户k测量到的所述目标邻区y到所述第一用户k的RSRP，所述Y为所述第二小区中所述第一用户k可测量到的邻区的总数，Fy为所述目标邻区y在所述第二时刻的总发射流数，wy,f为所述目标邻区y的第f流在所述第二时刻的发射权值，wk,y用于表征所述目标邻区y到所述第一用户k的信道，所述wk,y的维度和所述wy,f的维度相同
由所述第一用户k按照所述第一用户k的流数为1进行测量并上报给所述第一基站的预编码矩阵的行列数PMI来表征；
当所述第一小区在所述第一时刻至所述第二时刻之间进行过协同波束赋形CBF权值调整，所述wk，SU,l为所述第一用户k的第l流在CBF权值调整前的发射权值，所述wk,CBF,l为所述第一用户k的第l流在CBF权值调整后的发射权值；
当所述第一小区在所述第一时刻至所述第二时刻之间未进行过协同波束赋形CBF权值调整，所述wk，SU,l等于所述wk,CBF,l，表示所述第一用户k的第l流在所述第二时刻的发射权值。
进一步的，如图3-2所示，该装置还包括：
获取模块306，用于在所述第一小区的用户中确定第二时刻的第一预调度用户之后，获取所述第一预调度用户的用户测量集，所述第一预调度用户的用户测量集用于记录干扰所述第一预调度用户的干扰源邻区，以及所述干扰源邻区的RSRP对所述第一预调度用户干扰程度；
第二接收模块307，用于接收第三小区所属第三基站发送的预调度信息，所述预调度信息包括：第三预调度用户的用户测量集，所述第三预调度用户为所述第三基站在所述第一时刻确定的所述第二时刻的预调度用户，所述第三预调度用户的用户测量集用于记录干扰所述第三预调度用户的干扰源邻区，以及所述干扰源邻区的RSRP对所述第三预调度用户干扰程度，所述第三小区为所述第一小区的邻区中被所述第一小区干扰的小区或所述第一小区的所有邻区；
第三确定模块308，用于根据所述第一预调度用户的用户测量集和所述第三预调度用户的用户测量集，确定所述第一预调度用户是否为CBF待调整用户。
一方面，所述第一小区的邻区中符合预设交互条件的邻区为在预设时长内所述第一基站向其发送过用户测量集的基站，所述预设时长大于或等于所述第一时刻与所述第二时刻的间隔时长；如图3-3所示，所述装置还包括：
发送模块309，用于在所述确定所述第一小区在第二时刻的第一发射权值之后，向关联 邻区所属基站发送所述第一发射权值，所述关联邻区所属基站为所述预设时长内向所述第一基站发送过用户测量集的基站。
另一方面，所述第一小区的邻区中符合预设交互条件的邻区为所述第一小区的所有邻区，如图3-3所示，所述装置还包括：
发送模块309，用于在所述确定所述第一小区在第二时刻的第一发射权值之后，向所述第二基站发送所述第一发射权值。
可选的，所述筛选模块305，用于：
根据每个用户在所述第二时刻的SINR，确定所述每个用户在第二时刻的调制和编码方案MCS；
根据所述每个用户在第二时刻的MCS，确定每个用户在第二时刻的频谱效率；
根据所述每个用户在第二时刻的频谱效率，采用比例公平原则在所述第一小区中筛选所述第二时刻的目标调度用户。
可选的，所述预调度信息还包括：第三预调度用户的信道状态信息CSI，所述第二确定模块302，用于：
当所述第一预调度用户为CBF待调整用户，从所述第三预调度用户的CSI中获取CBF协作用户的CSI，所述CBF协作用户为所述第一基站确定的所述第三预调度用户中受所述第一小区干扰的最严重的前n个用户，所述n为所述第一小区能够协调的用户个数阈值；
根据所述第一预调度用户的CSI和所述CBF协作用户的CSI，采用特征向量迫零EZF、正则化特征向量迫零REZF或最大化信号泄露噪声比SLNR确定所述第一小区的第一发射权值。
综上所述，本发明实施例中，第一时刻第一确定模块在第一小区的用户中确定第二时刻的第一预调度用户后，在保证不调整第一小区和其关联邻区的发射权值的前提下，筛选模块找到第二时刻最符合该发射权值且优先级最高的用户作为目标调度用户，避免实际调度时发射权值失效的情况，提高干扰避让的可靠性。
本发明实施例还提供一种数据传输系统，包括：至少两个基站，所述至少两个基站包括所述第一基站，所述第一基站包括如图3-1至图3-3任一所示的调度用户的确定装置。
请参考图4，其示出了本申请示例性实施例涉及的一种调度用户的确定装置的结构示意图。该装置可以配置于基站中。如图4所示，该装置可以包括：发射机301、接收机302和处理器303。其中，该处理器303可以用于执行上述附图2-1至2-3所示的调度用户的确定方法。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和模块的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现，所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机的可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户 线)或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质，或者半导体介质(例如固态硬盘)等。
以上所述仅为本申请的可选实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (17)

  1. 一种调度用户的确定方法，其特征在于，应用于数据传输系统的第一基站，所述第一基站包括至少两个天线，所述第一基站管理第一小区，所述方法包括：
    在第一时刻，在所述第一小区的用户中确定第二时刻的第一预调度用户，所述第二时刻在所述第一时刻之后；
    确定所述第一小区在第二时刻的第一发射权值；
    接收所述数据传输系统中第二小区所属的第二基站发送的在所述第二时刻的第二发射权值，所述第二小区包括所述第一小区的邻区中符合预设交互条件的邻区；
    根据所述第一发射权值和所述第二发射权值，计算所述第一小区中每个用户在所述第二时刻的信干噪比SINR；
    根据每个用户在所述第二时刻的SINR，在所述第一小区的用户中筛选出所述第二时刻的目标调度用户。
  2. 根据权利要求1所述的方法，其特征在于，所述数据传输系统为时分双工TDD系统，
    所述根据所述第一发射权值和所述第二发射权值，计算所述第一小区中每个用户在所述第二时刻的信干噪比SINR，包括：
    根据第一发射权值和第二发射权值，采用第一信噪比计算公式，计算第一用户k在第二时刻的SINR，所述第一信噪比计算公式为：
    Figure PCTCN2017080257-appb-100001
    其中，第一用户k为第二时刻所述第一小区的任一用户，SINRk，l为所述第一用户k的第l流在第二时刻的SINR，Hi,k为第一基站i到所述第一用户k的信道，所述y为所述第一用户k的目标邻区，所述目标邻区为所述第二小区中所述第一用户k可测量到的邻区中一个，Hy,k为所述目标邻区y到所述第一用户k的信道，所述noise为所述第一用户的自身底噪，所述Y为所述第二小区中所述第一用户k可测量到的邻区的总数，wy,f为所述目标邻区y的第f流在所述第二时刻的发射权值，Fy为所述目标邻区y在所述第二时刻的总发射流数。
  3. 根据权利要求1所述的方法，其特征在于，所述数据传输系统为频分双工FDD系统，
    所述根据所述第一发射权值和所述第二发射权值，计算所述第一小区中每个用户在所述第二时刻的信干噪比SINR，包括：
    根据第一发射权值和第二发射权值，采用第二信噪比计算公式，计算第一用户k在第二时刻的SINR，所述第二信噪比计算公式为：
    Figure PCTCN2017080257-appb-100002
    其中，第一用户k为第二时刻所述第一小区的任一用户，SINRk，l为所述第一用户k的第l流在第二时刻的SINR，RSRPk,i为在所述第二时刻所述第一用户k测量到的第一小区i到所述第一用户的SINR，H表示求矩阵的共轭转置，所述y为所述第一用户k的目标邻区，所述目标邻区为所述第二小区中所述第一用户k可测量到的邻区中一个，RSRPk,y为在所述第二时刻所述第一用户k测量到的所述目标邻区y到所述第一用户k的RSRP，所述Y为所述第二小区中所述第一用户k可测量到的邻区的总数，Fy为所述目标邻区y在所述第二时刻的总发射流数，wy,f为所述目标邻区y的第f流在所述第二时刻的发射权值，wk,y用于表征所述目标邻区y到所述第一用户k的信道，所述wk,y的维度和所述wy,f的维度相同
    由所述第一用户k按照所述第一用户k的流数为1进行测量并上报给所述第一基站的预编码矩阵的行列数PMI来表征；
    当所述第一小区在所述第一时刻至所述第二时刻之间进行过协同波束赋形CBF权值调整，所述wk，SU,l为所述第一用户k的第l流在CBF权值调整前的发射权值，所述wk,CBF,l为所述第一用户k的第l流在CBF权值调整后的发射权值；
    当所述第一小区在所述第一时刻至所述第二时刻之间未进行过协同波束赋形CBF权值调整，所述wk，SU,l等于所述wk,CBF,l，表示所述第一用户k的第l流在所述第二时刻的发射权值。
  4. 根据权利要求1至3任一所述的方法，其特征在于，
    在所述第一小区的用户中确定第二时刻的第一预调度用户之后，所述方法还包括：
    获取所述第一预调度用户的用户测量集，所述第一预调度用户的用户测量集用于记录干扰所述第一预调度用户的干扰源邻区，以及所述干扰源邻区的RSRP对所述第一预调度用户干扰程度；
    接收第三小区所属第三基站发送的预调度信息，所述预调度信息包括：第三预调度用户的用户测量集，所述第三预调度用户为所述第三基站在所述第一时刻确定的所述第二时刻的预调度用户，所述第三预调度用户的用户测量集用于记录干扰所述第三预调度用户的干扰源邻区，以及所述干扰源邻区的RSRP对所述第三预调度用户干扰程度，所述第三小区为所述第一小区的邻区中被所述第一小区干扰的小区或所述第一小区的所有邻区；
    根据所述第一预调度用户的用户测量集和所述第三预调度用户的用户测量集，确定所述第一预调度用户是否为CBF待调整用户。
  5. 根据权利要求4所述的方法，其特征在于，
    所述第一小区的邻区中符合预设交互条件的邻区为在预设时长内所述第一基站向其发送过用户测量集的基站，所述预设时长大于或等于所述第一时刻与所述第二时刻的间隔时长；
    在所述确定所述第一小区在第二时刻的第一发射权值之后，所述方法还包括：
    向关联邻区所属基站发送所述第一发射权值，所述关联邻区所属基站为所述预设时长内向所述第一基站发送过用户测量集的基站。
  6. 根据权利要求4所述的方法，其特征在于，
    所述第一小区的邻区中符合预设交互条件的邻区为所述第一小区的所有邻区，
    在所述确定所述第一小区在第二时刻的第一发射权值之后，所述方法还包括：
    向所述第二基站发送所述第一发射权值。
  7. 根据权利要求1所述的方法，其特征在于，
    所述根据每个用户在所述第二时刻的SINR，在所述第一小区的用户中筛选出所述第二时刻的目标调度用户，包括：
    根据每个用户在所述第二时刻的SINR，确定所述每个用户在第二时刻的调制和编码方案MCS；
    根据所述每个用户在第二时刻的MCS，确定每个用户在第二时刻的频谱效率；
    根据所述每个用户在第二时刻的频谱效率，采用比例公平原则在所述第一小区中筛选所述第二时刻的目标调度用户。
  8. 根据所述4所述的方法，其特征在于，所述预调度信息还包括：第三预调度用户的信道状态信息CSI，
    所述确定所述第一小区的第一发射权值，包括：
    当所述第一预调度用户为CBF待调整用户，从所述第三预调度用户的CSI中获取CBF协作用户的CSI，所述CBF协作用户为所述第一基站确定的所述第三预调度用户中受所述第一小区干扰的最严重的前n个用户，所述n为所述第一小区能够协调的用户个数阈值；
    根据所述第一预调度用户的CSI和所述CBF协作用户的CSI，采用特征向量迫零EZF、正则化特征向量迫零REZF或最大化信号泄露噪声比SLNR确定所述第一小区的第一发射权值。
  9. 一种调度用户的确定装置，其特征在于，应用于数据传输系统的第一基站，所述第一基站包括至少两个天线，所述第一基站管理第一小区，所述装置包括：
    第一确定模块，用于在第一时刻，在所述第一小区的用户中确定第二时刻的第一预调度用户，所述第二时刻在所述第一时刻之后；
    第二确定模块，用于确定所述第一小区在第二时刻的第一发射权值；
    第一接收模块，用于接收所述数据传输系统中第二小区所属的第二基站发送的在所述第二时刻的第二发射权值，所述第二小区包括所述第一小区的邻区中符合预设交互条件的邻区；
    计算模块，用于根据所述第一发射权值和所述第二发射权值，计算所述第一小区中每个用户在所述第二时刻的信干噪比SINR；
    筛选模块，用于根据每个用户在所述第二时刻的SINR，在所述第一小区的用户中筛选出所述第二时刻的目标调度用户。
  10. 根据权利要求9所述的装置，其特征在于，所述数据传输系统为时分双工TDD系统，
    所述计算模块，用于：
    根据第一发射权值和第二发射权值，采用第一信噪比计算公式，计算第一用户k在第二时刻的SINR，所述第一信噪比计算公式为：
    Figure PCTCN2017080257-appb-100003
    其中，第一用户k为第二时刻所述第一小区的任一用户，SINRk，l为所述第一用户k的第l流在第二时刻的SINR，Hi,k为第一基站i到所述第一用户k的信道，所述y为所述第一用户k的目标邻区，所述目标邻区为所述第二小区中所述第一用户k可测量到的邻区中一个，Hy,k为所述目标邻区y到所述第一用户k的信道，所述noise为所述第一用户的自身底噪，所述Y为所述第二小区中所述第一用户k可测量到的邻区的总数，wy,f为所述目标邻区y的第f流在所述第二时刻的发射权值，Fy为所述目标邻区y在所述第二时刻的总发射流数。
  11. 根据权利要求9所述的装置，其特征在于，所述数据传输系统为频分双工FDD系统，
    所述计算模块，用于：
    根据第一发射权值和第二发射权值，采用第二信噪比计算公式，计算第一用户k在第二时刻的SINR，所述第二信噪比计算公式为：
    Figure PCTCN2017080257-appb-100004
    其中，第一用户k为第二时刻所述第一小区的任一用户，SINRk，l为所述第一用户k的第l流在第二时刻的SINR，RSRPk,i为在所述第二时刻所述第一用户k测量到的第一小区i到所述第一用户的SINR，H表示求矩阵的共轭转置，所述y为所述第一用户k的目标邻区，所述目标邻区为所述第二小区中所述第一用户k可测量到的邻区中一个，RSRPk,y为在所述第二时刻所述第一用户k测量到的所述目标邻区y到所述第一用户k的RSRP，所述Y为所述第二小区中所述第一用户k可测量到的邻区的总数，Fy为所述目标邻区y在所述第二时刻的总发射流数，wy,f为所述目标邻区y的第f流在所述第二时刻的发射权值，wk,y用于表征所述目标邻区y到所述第一用户k的信道，所述wk,y的维度和所述wy,f的维度相同
    由所述第一用户k按照所述第一用户k的流数为1进行测量并上报给所述第一基站的预编码矩阵的行列数PMI来表征；
    当所述第一小区在所述第一时刻至所述第二时刻之间进行过协同波束赋形CBF权值调整，所述wk，SU,l为所述第一用户k的第l流在CBF权值调整前的发射权值，所述wk,CBF,l为所述第一用户k的第l流在CBF权值调整后的发射权值；
    当所述第一小区在所述第一时刻至所述第二时刻之间未进行过协同波束赋形CBF权值调整，所述wk，SU,l等于所述wk,CBF,l，表示所述第一用户k的第l流在所述第二时刻的发射权值。
  12. 根据权利要求9至11任一所述的装置，其特征在于，所述装置还包括：
    获取模块，用于在所述第一小区的用户中确定第二时刻的第一预调度用户之后，获取所述第一预调度用户的用户测量集，所述第一预调度用户的用户测量集用于记录干扰所述第一预调度用户的干扰源邻区，以及所述干扰源邻区的RSRP对所述第一预调度用户干扰程度；
    第二接收模块，用于接收第三小区所属第三基站发送的预调度信息，所述预调度信息包括：第三预调度用户的用户测量集，所述第三预调度用户为所述第三基站在所述第一时刻确定的所述第二时刻的预调度用户，所述第三预调度用户的用户测量集用于记录干扰所述第三预调度用户的干扰源邻区，以及所述干扰源邻区的RSRP对所述第三预调度用户干扰程度， 所述第三小区为所述第一小区的邻区中被所述第一小区干扰的小区或所述第一小区的所有邻区；
    第三确定模块，用于根据所述第一预调度用户的用户测量集和所述第三预调度用户的用户测量集，确定所述第一预调度用户是否为CBF待调整用户。
  13. 根据权利要求12所述的装置，其特征在于，
    所述第一小区的邻区中符合预设交互条件的邻区为在预设时长内所述第一基站向其发送过用户测量集的基站，所述预设时长大于或等于所述第一时刻与所述第二时刻的间隔时长；
    所述装置还包括：
    发送模块，用于在所述确定所述第一小区在第二时刻的第一发射权值之后，向关联邻区所属基站发送所述第一发射权值，所述关联邻区所属基站为所述预设时长内向所述第一基站发送过用户测量集的基站。
  14. 根据权利要求12所述的装置，其特征在于，
    所述第一小区的邻区中符合预设交互条件的邻区为所述第一小区的所有邻区，
    所述装置还包括：
    发送模块，用于在所述确定所述第一小区在第二时刻的第一发射权值之后，向所述第二基站发送所述第一发射权值。
  15. 根据权利要求9所述的装置，其特征在于，
    所述筛选模块，用于：
    根据每个用户在所述第二时刻的SINR，确定所述每个用户在第二时刻的调制和编码方案MCS；
    根据所述每个用户在第二时刻的MCS，确定每个用户在第二时刻的频谱效率；
    根据所述每个用户在第二时刻的频谱效率，采用比例公平原则在所述第一小区中筛选所述第二时刻的目标调度用户。
  16. 根据所述12所述的装置，其特征在于，所述预调度信息还包括：第三预调度用户的信道状态信息CSI，
    所述第二确定模块，用于：
    当所述第一预调度用户为CBF待调整用户，从所述第三预调度用户的CSI中获取CBF协作用户的CSI，所述CBF协作用户为所述第一基站确定的所述第三预调度用户中受所述第一小区干扰的最严重的前n个用户，所述n为所述第一小区能够协调的用户个数阈值；
    根据所述第一预调度用户的CSI和所述CBF协作用户的CSI，采用特征向量迫零EZF、正则化特征向量迫零REZF或最大化信号泄露噪声比SLNR确定所述第一小区的第一发射权值。
  17. 一种数据传输系统，其特征在于，包括：至少两个基站，所述至少两个基站包括所述第一基站，所述第一基站包括所述权利要求9至16任一所述的调度用户的确定装置。
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