WO2011038675A1 - 小区间进行空间协调的方法和设备 - Google Patents

小区间进行空间协调的方法和设备 Download PDF

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Publication number
WO2011038675A1
WO2011038675A1 PCT/CN2010/077428 CN2010077428W WO2011038675A1 WO 2011038675 A1 WO2011038675 A1 WO 2011038675A1 CN 2010077428 W CN2010077428 W CN 2010077428W WO 2011038675 A1 WO2011038675 A1 WO 2011038675A1
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WIPO (PCT)
Prior art keywords
terminal
base station
information
cell
coordinated
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PCT/CN2010/077428
Other languages
English (en)
French (fr)
Inventor
高秋彬
缪德山
彭莹
孙韶辉
Original Assignee
大唐移动通信设备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Priority to EP10819904.3A priority Critical patent/EP2485525B1/en
Priority to US13/386,423 priority patent/US9042927B2/en
Priority to DK10819904.3T priority patent/DK2485525T3/en
Priority to ES10819904.3T priority patent/ES2693690T3/es
Priority to PL10819904T priority patent/PL2485525T3/pl
Publication of WO2011038675A1 publication Critical patent/WO2011038675A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022Site diversity; Macro-diversity
    • H04B7/024Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J11/00Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023Interference mitigation or co-ordination
    • H04J11/005Interference mitigation or co-ordination of intercell interference
    • H04J11/0053Interference mitigation or co-ordination of intercell interference using co-ordinated multipoint transmission/reception
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24Cell structures
    • H04W16/28Cell structures using beam steering
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/16Interfaces between hierarchically similar devices
    • H04W92/20Interfaces between hierarchically similar devices between access points

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and device for spatial coordination between cells. Background technique
  • LTE-Advanced Long Term Evolution Advanced
  • 3GPP 3rd Generation Partnership Project
  • the ITU International Telecommunications Union
  • IMT-Advanced International Mobile Telecom System Advanced
  • the peak rate of line data transmission needs to reach 1 Gbps and 500 M bps.
  • very high demands are placed on the average spectral efficiency of the system and the efficiency of the edge spectrum.
  • Multipoint coordinated transmission technology is the collaboration between multiple transmission points separated geographically. In general, multiple transmission points are base stations of different cells. Multi-point coordinated transmission technology is divided into downlink coordinated transmission and uplink joint reception.
  • the downlink multi-point coordinated transmission technology scheme is mainly divided into two categories: cooperative scheduling/beamforming and joint transmission.
  • the base stations of all cells in the coordinated cell set send the same or different data to the terminal in the same radio resource block, that is, the base stations of the multiple coordinated cells are in the same Send data to the same terminal at a time.
  • the interference signals between different cells in the original LTE system become useful signals, thereby reducing inter-cell interference and improving system performance.
  • FIG. 1 it is a schematic diagram of joint transmission of two cell cooperation modes in the prior art.
  • the base stations of the two cells simultaneously transmit valid data to the terminal, and the signals sent by the base stations of the two cells are combined in the air and then received by the UE (User Equipment, user equipment), thereby effectively reducing inter-cell interference and improving transmission.
  • the UE User Equipment, user equipment
  • CS/CBF Coordinated Scheduling/Coordinated Beamforming
  • Other cells within the coordinated cell set may utilize the same radio resource block to serve different UEs.
  • the signal transmitted by the base station of each cell does not consider interference with the signal transmitted by the base station of other cells, and the transmission direction and resources of the small-area signal are not coordinated.
  • the base station transmitting signals of the cells in the coordinated cell set of the CBF need to coordinate according to the interference of other cell signals, so as to reduce interference to other cell UEs as much as possible.
  • the coordinated cells effectively avoid the relatively large interference beams, thereby reducing mutual interference and improving the quality of the received signal.
  • FIG. 2 it is a schematic diagram of avoiding the beam direction of a transmission signal of a service terminal by using beam coordinated scheduling in two coordinated cells in the prior art.
  • the joint transmission scheme requires that the participating cells can obtain the data packets to be sent to the UE.
  • the data packet of the UE is transmitted from the base station of the serving cell of the UE to the base station of the coordinated cell of the UE through the X2 interface, which brings great overhead and becomes a major factor restricting the application of the joint transmission scheme.
  • the existing CBF scheme needs to transmit the scheduling information on the subbands in each sub-frame to the neighboring cells.
  • the overhead of the X2 interface is large, which affects the actual application. Summary of the invention
  • the embodiments of the present invention provide a method and a device for performing spatial coordination between cells, which can enable pre-scheduling information of terminals of base stations of each cell that are cooperatively transmitted, and perform coordinated scheduling/beamforming according to pre-scheduling information.
  • an embodiment of the present invention provides a method for performing spatial coordination between cells, which is applied to a mobile communication system including multiple cells, where one of the multiple cells is a serving cell of the terminal, One or more of the other cells are the coordinated cells of the terminal, and the base station corresponding to each of the cells provides the coordinated transmission service for the terminal, including:
  • the base station of the serving cell acquires channel information of the terminal
  • the base station of the serving cell performs pre-scheduling on the terminal according to the obtained channel information of the terminal and the service requirement of the terminal;
  • the base station of the serving cell delivers pre-scheduling information to the base station of the coordinated cell, so that the base station of the coordinated cell performs coordinated scheduling/cooperative beamforming with the base station of the serving cell according to the pre-scheduling information.
  • the embodiment of the present invention further provides a method for spatial coordination between cells, which is applied to a mobile communication system including multiple cells, where one of the multiple cells is a serving cell of the terminal, and other cells
  • a method for spatial coordination between cells which is applied to a mobile communication system including multiple cells, where one of the multiple cells is a serving cell of the terminal, and other cells
  • the coordinated cells of the terminal and the base station corresponding to each of the cells provides the coordinated transmission service for the terminal, including:
  • the base station of the serving cell receives the pre-scheduling information sent by the base station of the coordinated cell and the channel information of the terminal to be scheduled in the serving cell;
  • the base station of the serving cell performs coordinated scheduling/cooperative beamforming according to the pre-scheduling information and channel information of the terminal to be scheduled in the serving cell.
  • the embodiment of the present invention further provides a base station, which is applied to a mobile communication system including multiple cells, where one of the multiple cells is a serving cell of the terminal, and one or more of the other cells.
  • the base station corresponding to each of the cells provides a cooperative transmission service for the terminal, and when the base station corresponds to the serving cell, the method includes:
  • An obtaining module configured to acquire channel information of the terminal
  • a pre-scheduling module configured to perform pre-scheduling on the terminal according to the channel information of the terminal acquired by the acquiring module, and the service requirement of the terminal;
  • a sending module configured to: transmit the pre-scheduling information generated by the pre-scheduling module to the base station of the coordinated cell, and enable the base station of the coordinated cell to perform coordinated scheduling with the base station of the serving cell according to the pre-scheduling information.
  • the embodiment of the present invention further provides a base station, which is applied to a mobile communication system including multiple cells, where one of the multiple cells is a serving cell of the terminal, and one or more of the other cells.
  • the base station corresponding to each of the cells provides a cooperative transmission service for the terminal, and when the base station corresponds to the serving cell, the method includes:
  • a receiving module configured to receive pre-scheduling information sent by a base station of the coordinated cell, and channel information of a terminal to be scheduled in the serving cell;
  • a scheduling module configured to perform coordinated scheduling/cooperative beamforming according to pre-scheduling information received by the receiving module and channel information of a terminal to be scheduled in the serving cell.
  • the embodiment of the invention has the following advantages:
  • pre-scheduling information is transmitted between base stations of each cell that are cooperatively transmitted, and cooperative scheduling/beamforming is performed according to the pre-scheduling information, thereby achieving cooperation with less information interaction amount.
  • Scheduling/beamforming improves the spectrum scheduling efficiency of the edge terminals of each cell.
  • FIG. 1 is a schematic diagram of joint transmission of two cell cooperation modes in the prior art
  • FIG. 2 is a schematic diagram of the two coordinated cells in the prior art, which avoids the direction of the transmit signal beam of the serving terminal by using beam coordinated scheduling;
  • FIG. 3 is a schematic flowchart of a method for performing spatial coordination between cells according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a method for spatial coordination between cells in a specific application scenario according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a method for spatial coordination between cells in a specific application scenario according to an embodiment of the present invention
  • FIG. 6 is a schematic flowchart of another method for performing space coordination between cells in a specific application scenario according to an embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of another method for performing space coordination between cells in a specific application scenario according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of another base station according to an embodiment of the present invention. detailed description
  • scheduling information on a subband in each subframe needs to be transmitted to a coordinated cell for cooperative transmission, and therefore, a large amount of information traffic is generated, which is caused by an interface for transmitting scheduling information.
  • a large burden, in the specific application scenario, especially for the X2 interface has a large resource overhead requirements, thus affecting the actual application of the network.
  • the corresponding base station can perform cooperative scheduling/beamforming according to the pre-scheduling information by transmitting pre-scheduling information between base stations of each cell performing cooperative transmission.
  • the embodiment of the present invention provides a method for spatial coordination between cells, which is applied to a mobile communication system including multiple cells, and one of multiple cells.
  • the cell is a serving cell of the terminal, and one or more of the other cells are coordinated cells of the terminal, and the base station corresponding to each cell provides a coordinated transmission service for the terminal.
  • FIG. 3 it is a schematic flowchart of a method for performing spatial coordination between cells according to an embodiment of the present invention, which specifically includes the following steps:
  • Step S301 The base station acquires channel information of the base station to the terminal of the serving cell.
  • the base station obtains the channel information of the base station to the terminal of the serving cell, and specifically includes the following two situations:
  • the base station of the serving cell receives the channel information reported by the terminal.
  • the terminal directly transmits its own channel information to the base station, and the base station directly determines the channel information of the base station to the terminal of the serving cell according to the received channel information.
  • the base station of the serving cell receives the SRS (Sounding Reference Signal) sent by the terminal, and acquires channel information of the terminal according to the SRS signal.
  • SRS Sounding Reference Signal
  • the terminal needs to send the SRS signal to the base station.
  • the base station of the serving cell directly sends the SRS scheduling information to the to-be-scheduled terminal.
  • the base station of the serving cell needs to send the SRS scheduling information to the base station of the coordinated cell.
  • the base station of the coordinated cell also needs to receive the SRS signal sent by the terminal according to the corresponding indication.
  • the foregoing SRS-related policy may be adjusted according to specific system requirements, and the specific application of the above policy does not affect the scope of protection of the present invention.
  • the base station obtains the channel information of the base station to the terminal of the serving cell, and also acquires the channel information of the base station to the terminal of the coordinated cell.
  • the channel information includes the following types:
  • WPI Wide Precoding Matrix Indicator
  • BPI Best Precoding Matrix Indicator
  • This method mainly considers that the current base station is the base station of the serving cell of the terminal, but may be the base station of the coordinated cell of the other terminal at the same time. Therefore, the base station may also receive the pre-scheduling information sent by the base station of other coordinated cells.
  • the pre-scheduled information also relates to resource occupancy in the current system. Therefore, according to the resource occupation information, the base station can allocate corresponding resources in the corresponding pre-scheduling process to avoid allocating resources with large interference. .
  • the base station of the coordinated cell receives the SRS signal sent by the terminal, and obtains the channel information of the terminal according to the SRS signal.
  • the channel information corresponding to the foregoing (1), (2), (3), and (5) may be a base station that is fed back to the serving cell by the UE, or may be a base station that is fed back to the coordinated cell by the UE.
  • the UE may report more than one BPI and WPI for each coordinated cell, corresponding to one or more precoding matrices with the weakest interference and one or more precoding matrices with the strongest interference.
  • Step S302 The base station of the serving cell performs pre-scheduling on the terminal according to the obtained channel information of the terminal and the service requirement of the terminal.
  • the specific processing flow of this step is specifically divided into the following three cases. :
  • Case 1 When the pre-scheduling information sent by the base station receiving the coordinated cell of the base station includes the WPI, the base station performs pre-scheduling according to the WPI information, the PMI information reported by the terminal, and the service requirement of the terminal, and the base station performs pre-scheduling on the terminal. Try to avoid taking up the resources corresponding to the above WPI.
  • the base station when the base station receives the pre-scheduling information sent by the base station of the coordinated cell, it first determines which UEs are pre-scheduled by the coordinated cell on each sub-band, and corresponding spatial information. For example, the coordinated cell pre-schedules two UEs on one sub-band, namely UE1 and UE2, and the WPI of UE1 on the sub-band is WPI1, and the WPI of UE2 on the sub-band is WPI2.
  • the pre-scheduling method is: if the precoding matrix corresponding to the PMI reported by the terminal or the precoding matrix calculated according to the channel information and the precoding matrix corresponding to (WPI1 or WPI2) are the same or similar, the base station is on the subband. The UE should be avoided from scheduling on this subband.
  • Case 2 When the base station receives the BPI sent by the base station of the coordinated cell, the base station according to the BPI information, and the PMI and WPI information reported by the terminal and the service requirement of the terminal, in this case, when the base station receives When the pre-scheduling information sent by the base station of the coordinated cell is first determined, which UEs are pre-scheduled by the coordinated cell on each sub-band, and corresponding spatial information respectively.
  • the coordinated cell pre-schedules 2 UEs on one sub-band, namely UE1 and UE2, the BPI of UE1 on the sub-band is BPI1, and the BPI of UE2 on the sub-band is BPI2.
  • the pre-scheduling method is: if the precoding matrix corresponding to the PMI reported by the terminal or the precoding matrix calculated according to the channel information and the precoding matrix corresponding to (BPI1 or BPI2) are the same or similar, the base station The UE should be preferentially scheduled on this subband.
  • Case 3 When the base station receives the resource occupation information sent by the base station of the other coordinated cell, the base station selects the resource with the least interference to perform the terminal according to the resource occupation information, the PMI and the WPI information reported by the terminal, and the service requirement of the terminal. Pre-scheduling.
  • the base station when the base station receives the pre-scheduling information sent by the base station of the coordinated cell, it first determines which UEs are pre-scheduled by the coordinated cell on each sub-band, respectively, corresponding spatial information, and selects the resource with the least interference. Pre-schedule the terminal.
  • Step S303 The base station of the serving cell transmits the pre-scheduling information to the base station of the coordinated cell, so that the base station of the coordinated cell performs coordinated scheduling/cooperative beamforming according to the received pre-scheduling information.
  • the pre-scheduling information specifically includes:
  • the identification information of the terminal, the resource information allocated by the terminal, and/or the spatial information of the terminal on the corresponding resource are used.
  • Case 1 The pre-scheduling information includes the spatial information of the terminal on the corresponding resource.
  • the channel information of the terminal on the corresponding resource is specifically that the terminal is on the corresponding resource.
  • the base station of the serving cell performs coordinated scheduling/cooperative beamforming together with the base station of the coordinated cell according to the pre-scheduling information, specifically:
  • the cooperative cell can calculate the precoding matrix of the terminal to be scheduled by the following formula:
  • H is the channel matrix of the terminal to be scheduled
  • V is a precoding matrix corresponding to WPI
  • F ! is the precoding matrix of the terminal to be scheduled.
  • the coordinated cell only schedules the reported PMI to be the same or similar to the WPI transmitted by the base station of the coordinated cell with a lower priority.
  • the channel information of the terminal on the corresponding resource is specifically the BPI of the terminal on the corresponding resource
  • the base station of the coordinated cell according to the pre-scheduling information the PMI reported by the high priority scheduling is the same as the BPI transmitted by the base station of the cooperation d and the area. Or a similar terminal.
  • the pre-scheduling information does not include the channel information of the terminal on the corresponding resource.
  • the base station of the coordinated cell can obtain the channel information of the terminal to the coordinated cell according to the SRS signal sent by the terminal. Therefore, the base station of the coordinated cell can directly identify the identifier of the terminal.
  • the information and the resource information allocated by the terminal are cooperatively coordinated/coordinated beamforming, and specifically include the following two methods:
  • the base station of the coordinated cell ensures that the direction angle between the to-be-scheduled terminal in the serving cell and the base station that may be scheduled in the coordinated cell to the serving cell is higher than a preset threshold.
  • the coordinated cell calculates the precoding matrix resources applicable to the terminal by the following formula:
  • rt i is a channel matrix of the terminal to be scheduled in the serving cell
  • 2 is a channel matrix of a terminal of the coordinated cell
  • I is a regularization factor
  • 1 is a precoding matrix of the terminal to be scheduled.
  • the pre-scheduling information includes the channel state information itself of the terminal in the corresponding resource in the coordinated cell.
  • the specific processing method is similar to the processing method of Case 2.
  • the pre-scheduling information includes a PMI corresponding to a precoding matrix used by the terminal on the corresponding resource in the serving cell.
  • the base station that is the serving cell can also receive the pre-scheduling information for scheduling the terminal in the coordinated cell that is sent by the base station of the cooperation d, and the specific processing process includes:
  • the base station of the serving cell receives the pre-scheduling information sent by the base station of the coordinated cell and the channel information of the terminal to be scheduled in the serving cell.
  • the pre-scheduling information transmitted by the base station of the coordinated cell received by the base station of the serving cell includes:
  • Identification information of the pre-scheduled terminal of the coordinated cell, resource information allocated by the pre-scheduled terminal of the coordinated cell, and/or channel information of the terminal to be scheduled in the precoding matrix serving cell of the pre-scheduled terminal of the coordinated cell on the corresponding resource Specifically, including:
  • the identification information of the terminal in the monthly service cell, the resource information allocated by the terminal, and/or the precoding matrix information of the terminal on the corresponding resource are used.
  • the base station of the serving cell performs coordinated scheduling/cooperative beamforming according to the pre-scheduling information and the channel information of the terminal to be scheduled in the serving cell.
  • the specific processing process includes:
  • the base station of the serving cell ensures that the direction angle between the to-be-scheduled terminal in the serving cell and the pre-scheduled terminal in the coordinated cell reaches the serving cell is higher than a preset threshold; or
  • the base station of the serving cell calculates the precoding matrix of the to-be-scheduled terminal according to the channel information of the terminal to be scheduled and the resource information allocated by the pre-scheduled terminal of the coordinated cell and/or the precoding matrix information of the terminal on the corresponding resource.
  • the embodiment of the invention has the following advantages:
  • pre-scheduling information is transmitted between base stations of each cell that are cooperatively transmitted, and cooperative scheduling/beamforming is performed according to the pre-scheduling information, thereby achieving cooperation with less information interaction amount.
  • Scheduling/beamforming improves the spectrum scheduling efficiency of the edge terminals of each cell.
  • FIG. 4 a schematic flowchart of a method for spatial coordination between cells in a specific application scenario is provided in the embodiment of the present invention, which specifically includes the following steps:
  • Step S401 The UE reports the PMI and the WPI to the base station of the serving cell.
  • the UE selects a precoding matrix according to a channel of the base station to the UE of the serving cell, and sends a PMI to the base station.
  • the UE reports the index value of the selected precoding matrix in a codebook set to the base station.
  • the criteria for PMI selection can be as follows:
  • N is the number of elements in the codebook set.
  • Hi is the channel matrix of the base station to the UE of the serving cell.
  • the UE selects a precoding matrix according to a channel from the base station to the UE of the coordinated cell, and selects a precoding matrix that generates maximum interference to the UE, and also selects from a codebook set, and the selected precoding matrix is in the codebook.
  • the index in is recorded as WPI.
  • WPI The meaning of WPI is that if the UE is scheduled on a certain sub-band, the coordinated cell is correspondingly said that the cooperative cell should try to avoid using the precoding matrix corresponding to the WPI.
  • the UE reports the WPI of the coordinated cell to the serving cell.
  • H 2 is a channel matrix of a base station to a UE of a coordinated cell
  • the reporting of ⁇ and WPI can be either broadband reporting or sub-band reporting.
  • the codebook used by the WPI and the WPI may be the same or different.
  • the selection criteria of the above-mentioned UI and WPI are only a preferred embodiment of the present invention, and may be changed according to the requirements of the specific system, such changes are not It affects the scope of protection of the present invention.
  • Step S402 The base station pre-allocates the frequency resource to the UE according to the PMI and WPI information reported by the UE in the cell and the WPI information transmitted by the base station of the coordinated cell, and the service requirement of the UE.
  • the UE will be scheduled in pre-allocated resources for a period of time in the future.
  • the resources pre-allocated by different UEs may overlap in the frequency domain.
  • a preferred method is to ensure that the WPIs of the coordinated cells reported by the UEs whose frequency resources overlap are the same or similar.
  • Step S403 The base station transmits the determined resource information pre-allocated by each UE to the base station of the coordinated cell.
  • the transmitted information includes: a UE identifier, a resource (subband) allocated by the UE, and WPI information of the UE in a corresponding coordinated cell.
  • the WPI information reported by the UE is corresponding to the coordinated cell, that is, the UE corresponds to one WPI in each coordinated cell. Therefore, after the pre-scheduling process, the base station needs to transmit the cooperation to the base station of the coordinated cell.
  • the WPI information corresponding to the cell is corresponding to the coordinated cell.
  • Step S404 The base station performs coordinated scheduling according to resource information pre-allocated by the serving cell and the coordinated cell.
  • each base station receives pre-scheduling information from the coordinated cell. Therefore, the base station should avoid using the WPI of the UE pre-scheduled on the sub-band by the coordinated cell when scheduling in each sub-band, or avoid using the pre-prepared UE. Encoding matrix.
  • the WPI can actually be regarded as a kind of direction information
  • the base station can control the interference in the direction by a signal processing algorithm such as a zero-forcing algorithm (ZF) during scheduling:
  • ZF zero-forcing algorithm
  • V is a precoding matrix corresponding to WPI
  • is a regularization factor
  • the serving cell only schedules the reported terminal with the same or similar WPI transmitted by the base station of the coordinated cell with a lower priority.
  • Step S501 The UE reports ⁇ and ⁇ to the base station of the serving cell.
  • the UE selects a precoding matrix according to the channel of the base station to the UE of the serving cell, and reports the manner by transmitting the ⁇ to the base station.
  • the UE selects a precoding matrix according to a channel of the base station to the UE of the coordinated cell, and selects a precoding matrix that generates minimum interference to the UE, and also selects from a codebook set, and the selected precoding matrix is in the codebook.
  • the index in the middle is marked as ⁇ .
  • the meaning of the BPI is that if the UE is scheduled on a certain sub-band, the coordinated cell is correspondingly interfered, that is, the coordinated cell should preferentially use the precoding matrix corresponding to the BPI.
  • the reporting of PMI and BPI can be either broadband reporting or sub-band reporting.
  • the codebooks used by PMI and BPI may be the same or different. Moreover, the above-mentioned changes in the selection criteria of PMI and BPI do not affect the scope of protection of the present invention.
  • Step S502 The base station pre-allocates the frequency resource to the UE according to the PMI and BPI information reported by the UE in the cell and the BPI information transmitted by the base station of the coordinated cell, and the service requirement of the UE.
  • the UE will be scheduled in pre-allocated resources for a period of time in the future.
  • the resources pre-allocated by different UEs may overlap in the frequency domain.
  • a preferred method is to ensure that the BPIs of the coordinated cells reported by the UEs whose frequency resources overlap are the same or similar.
  • Step S503 The base station transmits the determined resource information pre-allocated by each UE to the base station of the coordinated cell.
  • the transmitted information includes: a UE identifier, a resource (subband) allocated by the UE, and BPI information of the UE in the corresponding coordinated cell.
  • the BPI information reported by the UE is corresponding to the coordinated cell, that is, the UE corresponds to one BPI in each coordinated cell. Therefore, after the pre-scheduling process, the base station needs to transmit the cooperation to the base station of the coordinated cell. BPI information corresponding to the cell
  • Step S504 The base station performs coordinated scheduling according to resource information pre-allocated by the serving cell and the coordinated cell.
  • each base station receives the pre-scheduling information from the coordinated cell. Therefore, the base station should use the BPI of the UE pre-scheduled on the sub-band by the coordinated cell as much as possible in the scheduling of each sub-band, or preferentially use the pre-prepared Encoding matrix.
  • the base station of the coordinated cell schedules the reported PMI and the BPI transmitted by the base station of the coordinated cell according to the pre-scheduling information. Same or similar terminals.
  • FIG. 6 is a schematic flowchart of a method for performing spatial coordination between another cell in a specific application scenario according to an embodiment of the present disclosure, which specifically includes the following steps:
  • Step S601 The base station transmits the SRS scheduling information of the UE to the base station of the coordinated cell.
  • the information to be transmitted includes the period of SRS scheduling, subframe offset, base sequence, time-frequency resource location, cyclic shift value, and the like.
  • Step S602 The UE sends an SRS signal according to the resource indicated by the base station of the serving cell.
  • Step S603 The base station of the serving cell of the UE and the base station of the coordinated cell estimate the UE to the respective channel information.
  • the base station of the coordinated cell can estimate the channel information of the UE.
  • Step S604 The base station pre-allocates frequency resources for the UE according to the UE channel information in the cell and the service requirement of the UE.
  • the UE will be scheduled in pre-allocated resources for a period of time in the future.
  • Resources pre-allocated by different UEs may overlap in the frequency domain.
  • a preferred method is to require the UEs whose frequency resources overlap to have the same or close direction of arrival Do A.
  • Step S605 The base station transmits the determined resource information pre-allocated by each UE to the base station of the coordinated cell.
  • the information delivered includes: a UE ID, a resource (or a subband) allocated by the UE.
  • Step S606 The base station performs coordinated scheduling according to the resource information pre-allocated by the serving cell and the coordinated cell UE.
  • each base station receives pre-scheduling information from the coordinated cell. Therefore, the base station performs, in each sub-band, which UEs the known coordinated cell may schedule on the sub-band, and channel information of the UEs (obtained in step S603). .
  • the base station When performing scheduling, the base station should avoid/suppress interference to UEs that may be scheduled by the coordinated cell according to the channel information, and specifically includes the following two methods:
  • Method 1 is implemented by the method of DoA angle isolation, that is, the direction angle interval between the UE scheduled by the serving cell and the base station of the pre-scheduled UE of the cooperative cell to reach the serving cell should be greater than a certain value.
  • Method 2 Controlling the UE of the coordinated cell by using a signal processing algorithm such as a zero-forcing algorithm (ZF):
  • ZF zero-forcing algorithm
  • 11 2 is a channel matrix of the coordinated cell UE to the serving cell (here, it is assumed that the coordinated cell only pre-schedules one UE on the sub-band),
  • is a regularization factor
  • FIG. 7 is a schematic flowchart of a method for performing spatial coordination between another cell in a specific application scenario according to an embodiment of the present invention, which specifically includes the following steps:
  • Step S701 The base station sends the SRS scheduling information of the UE to the UE.
  • the information to be transmitted includes the period of SRS scheduling, subframe offset, base sequence, time-frequency resource location, cyclic shift value, and the like.
  • Step S702 The UE sends an SRS signal to the base station according to the resource indicated by the base station of the serving cell.
  • Step S703 The base station of the serving cell of the UE estimates the UE to the respective channel information.
  • Step S704 The UE reports WPI information to the base station.
  • the UE selects a precoding matrix according to a channel of the base station to the UE of the coordinated cell, and selects a pair.
  • the UE generates a precoding matrix with the largest interference, and reports the index value of the selected precoding matrix in a codebook set.
  • the index of the selected precoding matrix in the codebook is recorded as a WPI.
  • the criteria selected by WPI can be as follows:
  • N is the number of elements in the codebook set.
  • H 2 is a channel matrix of a base station to a UE of a coordinated cell
  • the reporting of the WPI may be a broadband report or a sub-band reporting.
  • the selection criteria of the WPI described above is only a preferred embodiment of the present invention, and may be changed according to the requirements of a specific system, such changes do not affect The scope of protection of the present invention.
  • Step S705 The base station pre-allocates the frequency resource to the UE according to the channel information and the WPI information of the UE in the cell, and the service requirement of the UE.
  • the UE will be scheduled for pre-allocated resources for a period of time in the future.
  • the resources pre-allocated by different UEs may overlap in the frequency domain.
  • An optimized method is that the WPIs of the coordinated cells reported by the UEs that require overlapping frequency resources are the same.
  • Step S706 The base station transmits the determined resource information pre-allocated by each UE to the base station of the coordinated cell.
  • the transmitted information includes: a UE identifier, a resource (subband) allocated by the UE, and WPI information of the UE on the corresponding subband.
  • Step S707 The base station performs coordinated scheduling according to the resource information pairs pre-allocated by the serving cell and the coordinated cell.
  • each base station receives pre-scheduling information from the coordinated cell. Therefore, the base station should avoid using the precoding matrix corresponding to the WPI of the UE pre-scheduled by the coordinated cell on the sub-band, or avoid using the sub-band in each sub-band. A precoding matrix close to it.
  • the WPI can actually be regarded as a kind of direction information
  • the base station can control the interference in the direction by a signal processing algorithm such as a zero-forcing algorithm (ZF) during scheduling:
  • ZF zero-forcing algorithm
  • H is the channel matrix of the UE to be scheduled
  • v is the precoding matrix corresponding to WPI
  • the UE reports the WPI of the neighboring cell.
  • the UE may also report the WPI instead, that is, the coordinated cell uses the precoding corresponding to the UE.
  • the matrix will have minimal interference to the UE.
  • the base station is required to use the UE's pre-scheduled UE on the corresponding sub-band as much as possible when performing scheduling.
  • the WPI or the ⁇ information exchanged between the base stations may be long-term information obtained by counting within a period of time, or short-time information obtained by instantaneous calculation. Changes do not affect the scope of protection of the present invention.
  • the WPI and the ⁇ information may be exchanged between the base stations, and the base station tries to avoid using the WPI corresponding precoding of the UE pre-scheduled by the coordinated cell on the sub-band when scheduling in each sub-band.
  • the embodiment of the invention has the following advantages:
  • pre-scheduling information is transmitted between base stations of each cell that are cooperatively transmitted, and cooperative scheduling/beamforming is performed according to the pre-scheduling information, thereby achieving cooperation with less information interaction amount.
  • Scheduling/beamforming improves the spectrum scheduling efficiency of the edge terminals of each cell.
  • the embodiment of the present invention further provides a base station, where the mobile station system includes a plurality of cells, where one of the multiple cells is a serving cell of the terminal, and the other cells are used.
  • One or more coordinated cells that are terminals, and the base station corresponding to each cell provides a coordinated transmission service for the terminal.
  • a base station is provided in the embodiment of the present invention, and when the base station corresponds to the serving cell, the method includes:
  • the obtaining module 81 is configured to acquire channel information of the terminal.
  • the obtaining module 81 obtains channel information of the terminal, which is specifically:
  • the acquiring module receives the channel information reported by the terminal.
  • the acquiring module receives the SRS signal sent by the terminal, and acquires channel information of the terminal according to the SRS signal.
  • the obtaining module 81 may acquire the precoding matrix information of the coordinated cell, and the following:
  • the precoding matrix occupation information pre-scheduling module 82 included in the pre-scheduling information sent by the base station of the coordinated cell is configured to perform pre-scheduling on the terminal according to the channel information of the terminal acquired by the obtaining module 81 and the service requirement of the terminal;
  • the sending module 83 is configured to: transmit the pre-scheduling information generated by the pre-scheduling module 82 to the base station of the coordinated cell, and enable the base station of the coordinated cell to perform coordinated scheduling/cooperative beamforming with the base station of the serving cell according to the pre-scheduling information.
  • the specific processing process includes the following three cases:
  • the precoding matrix information of the coordinated cell acquired by the obtaining module 81 is specifically the WPI of the coordinated cell
  • the pre-scheduling module 82 obtains according to the acquiring module 81.
  • the channel information of the terminal and the service requirement of the terminal are pre-scheduled to the terminal, and the pre-scheduling module 82 avoids occupying resources corresponding to the WPI when pre-scheduling the terminal.
  • the pre-scheduling module 82 pre-schedules the terminal according to the channel information of the terminal acquired by the obtaining module 81 and the service requirement of the terminal.
  • the scheduling module preferentially occupies resources corresponding to the BPI when pre-scheduling the terminal.
  • the pre-scheduling mode selects the resource with the least interference to pre-schedule the terminal according to the channel information of the terminal acquired by the obtaining module 81 and the service requirement of the terminal.
  • the embodiment of the present invention further provides another base station, which is also applied to the above system.
  • FIG. 9 When the base station corresponds to the monthly service cell, the structure diagram is as shown in FIG. 9, which specifically includes:
  • the receiving module 91 is configured to receive pre-scheduling information sent by the base station of the coordinated cell and channel information of the terminal to be scheduled in the serving cell;
  • the pre-scheduling information transmitted by the base station of the coordinated cell specifically includes the identifier information of the terminal, the resource information allocated by the terminal, and the precoding matrix information of the terminal on the corresponding resource.
  • the channel information of the terminal to be scheduled in the serving cell specifically includes the identifier information of the terminal in the serving cell, the resource information allocated by the terminal, and/or the precoding matrix information of the terminal on the corresponding resource.
  • the scheduling module 92 is configured to perform coordinated scheduling/cooperative beamforming according to the pre-scheduling information received by the receiving module 91 and the channel information of the terminal to be scheduled in the serving cell.
  • the specific processing procedure of the scheduling module 92 is: the scheduling module 92 ensures that the serving cell is to be scheduled.
  • the direction angle interval between the terminal and the pre-scheduled terminal of the coordinated cell to the serving cell is higher than a preset threshold; or
  • the scheduling module 92 calculates the precoding matrix of the terminal to be scheduled according to the channel information of the terminal to be scheduled and the resource information allocated by the pre-scheduled terminal of the coordinated cell and/or the precoding matrix information of the terminal on the corresponding resource.
  • the embodiment of the invention has the following advantages:
  • pre-scheduling information is transmitted between base stations of each cell that are cooperatively transmitted, and cooperative scheduling/beamforming is performed according to the pre-scheduling information, thereby achieving cooperation with less information interaction amount.
  • Scheduling/beamforming improves the spectrum scheduling efficiency of the edge terminals of each cell.
  • a computer device (may be a personal computer, a server, or a network device, etc.) to perform the various implementation scenarios described in the embodiments of the present invention. method.
  • modules in the apparatus in the implementation scenario may be distributed in the apparatus for implementing the scenario according to the implementation scenario description, or may be correspondingly changed in one or more devices different from the implementation scenario.
  • the modules of the above implementation scenarios may be combined into one module, or may be further split into multiple sub-modules.

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Description

Ί、区间进行空间协调的方法和设备 本申请要求于 2009 年 9 月 29 日提交中国专利局, 申请号为 200910093390.0, 发明名称为 "小区间进行空间协调的方法和设备" 的中 国专利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域, 特别涉及一种小区间进行空间协调的方 法和设备。 背景技术
在 3GPP ( 3rd Generation Partnership Project, 第三代合作伙伴计划) 的 LTE-Advanced ( Long Term Evolution Advanced, 高级长期演进) 系 统中, 会采用多小区协同传输技术提高小区边缘用户的服务质量。
ITU ( International Telecommunications Union, 国际电信联盟) 为下 一代移动通信系统 IMT- Advanced ( International Mobile Telecom System Advanced, 高级国际移动通信系统) 的性能提出了非常苛刻的要求, 比 如最大系统传输带宽达到 100MHz,上下行数据传输的峰值速率需要达到 lGbps和 500M bps。 同时对系统平均频谱效率和边缘频谱效率提出了非 常高的需求。
为了满足 IMT-Advanced新系统的要求, 3GPP在其下一代移动蜂窝 通信系统 LTE-Advanced 中提出了采用多点协同传输技术来提高系统的 性能。 多点协同传输技术是地理位置上分离的多个传输点之间的协作。 一般来说, 多个传输点是不同小区的基站。 多点协同传输技术分下行的 协同传输和上行的联合接收。
下行多点协同传输技术方案主要分为两类: 协同调度 /波束赋形和联 合传输。
联合传输方案中, 协作小区集合内的全部小区的基站在相同的无线 资源块中发送相同或者不同的数据到终端, 即多个协作小区的基站在同 一时刻发送数据到同一终端。 通过联合传输方式, 将原来 LTE系统中不 同小区间的干扰信号变成有用信号, 从而减少小区间干扰, 提升系统性 能。
如图 1 所示, 是现有技术中的两个小区协作方式进行联合传输的示 意图。 在图 1 中, 两个小区的基站同时发送有效数据到终端, 两个小区 的基站发送的信号在空中合并后被 UE ( User Equipment, 用户设备 )接 收, 有效减少小区间的干扰, 提升了传输信号质量, 从而增加平均频谱 效率和小区边缘传输速率。
协同调度 /波束赋形技术 ( Coordinated Scheduling/ Coordinated Beamforming, 以下筒称: CS/CBF ) , 只有 UE的服务小区向 UE发送数 据, 在这点上与现有的 LTE标准和传输方式相同。
协作小区集合内的其他小区可以利用相同的无线资源块为不同 UE 服务。 但是, 在 LTE标准中各小区的基站发送的信号并不考虑对其他小 区的基站发送信号的干扰, 小区间信号的发送方向和资源没有进行协调。 而 CBF的协作小区集合内各小区的基站发送信号需要根据对其它小区信 号的干扰进行协调,尽可能地减少对其它小区 UE的干扰。协作小区间通 过协调发送信号波束的方向, 有效地将干扰比较大的波束避开, 从而减 少相互间的干扰, 提升接收信号的质量。
如图 2所示, 为现有技术中两个协作小区通过波束协调调度, 将服 务终端的发送信号波束方向避开的示意图。
联合传输方案要求参与协作的小区都能获得将要发送给 UE 的数据 包。 一般而言, UE的数据包要从 UE的服务小区的基站通过 X2接口传 递到 UE的协作小区的基站,这会带来很大的开销,成为制约联合传输方 案应用的一个主要因素。
在实现本发明实施例的过程中, 申请人发现现有技术至少存在以下 问题:
CBF方案中, 数据只从 UE的服务小区的基站发出, 免去了通过 X2 接口传输数据信息的开销。 然而, 调度信息的及时共享是相邻小区可以 把波束避开的前提条件。调度信息的共享对 X2接口的时延和容量都有较 高的要求, 影响了 CBF方案在实际系统中的应用。
目前已有的 CBF方案需要将每个子帧内的子带上的调度信息传递给 相邻小区, X2接口的开销很大, 影响实际应用。 发明内容
本发明实施例提供一种小区间进行空间协调的方法和设备, 能够使 协作传输的各小区的基站之间传递终端的预调度信息, 并根据预调度信 息进行协同调度 /波束赋形。
为达到上述目的, 本发明实施例一方面提供了一种小区间进行空间 协调的方法, 应用于包括多个小区的移动通信系统中, 所述多个小区中 的一个小区为终端的服务小区, 其他小区中的一个或多个为所述终端的 协作小区, 各所述小区所对应的基站为所述终端提供协同传输服务, 包 括:
所述服务小区的基站获取所述终端的信道信息;
所述服务小区的基站根据获取到的所述终端的信道信息, 以及所述 终端的业务要求对所述终端进行预调度;
所述服务小区的基站将预调度信息传递给所述协作小区的基站, 使 所述协作小区的基站根据所述预调度信息与所述服务小区的基站一起进 行协同调度 /协同波束赋形。
另一方面, 本发明实施例还提供了一种小区间进行空间协调的方法, 应用于包括多个小区的移动通信系统中, 所述多个小区中的一个小区为 终端的服务小区, 其他小区中的一个或多个为所述终端的协作小区, 各 所述小区所对应的基站为所述终端提供协同传输服务, 包括:
所述服务小区的基站接收所述协作小区的基站发送的预调度信息和 所述服务小区中待调度的终端的信道信息;
所述服务小区的基站根据所述预调度信息和所述服务小区中待调度 的终端的信道信息进行协同调度 /协同波束赋形。 另一方面, 本发明实施例还提供了一种基站, 应用于包括多个小区 的移动通信系统中, 所述多个小区中的一个小区为终端的服务小区, 其 他小区中的一个或多个为所述终端的协作小区, 各所述小区所对应的基 站为所述终端提供协同传输服务, 所述基站与所述服务小区对应时, 包 括:
获取模块, 用于获取所述终端的信道信息;
预调度模块, 用于根据所述获取模块获取到的所述终端的信道信息, 以及所述终端的业务要求对所述终端进行预调度;
发送模块, 用于将所述预调度模块生成的预调度信息传递给所述协 作小区的基站, 使所述协作小区的基站根据所述预调度信息与所述服务 小区的基站一起进行协同调度 /协同波束赋形。
另一方面, 本发明实施例还提供了一种基站, 应用于包括多个小区 的移动通信系统中, 所述多个小区中的一个小区为终端的服务小区, 其 他小区中的一个或多个为所述终端的协作小区, 各所述小区所对应的基 站为所述终端提供协同传输服务, 所述基站与所述服务小区对应时, 包 括:
接收模块, 用于接收所述协作小区的基站发送的预调度信息和所述 服务小区中待调度的终端的信道信息;
调度模块, 用于根据所述接收模块接收的预调度信息和所述服务小 区中待调度的终端的信道信息进行协同调度 /协同波束赋形。
与现有技术相比, 本发明实施例具有以下优点:
通过应用本发明实施例的技术方案, 使协作传输的各小区的基站之 间传递预调度信息, 并根据预调度信息进行协同调度 /波束赋形, 从而, 以较少的信息交互量实现了协同调度 /波束赋形, 提高了各小区边缘终端 的频谱调度效率。 附图说明
图 1为现有技术中的两个小区协作方式进行联合传输的示意图; 图 2为现有技术中两个协作小区通过波束协调调度, 将服务终端的 发送信号波束方向避开的示意图;
图 3 为本发明实施例提出的一种小区间进行空间协调的方法的流程 示意图;
图 4为本发明实施例提出的具体应用场景下的一种小区间进行空间 协调的方法的流程示意图;
图 5 为本发明实施例提出的具体应用场景下的一种小区间进行空间 协调的方法的流程示意图;
图 6为本发明实施例提出的具体应用场景下的另一种小区间进行空 间协调的方法的流程示意图;
图 7 为本发明实施例提出的具体应用场景下的另一种小区间进行空 间协调的方法的流程示意图;
图 8为本发明实施例提出的一种基站的结构示意图;
图 9为本发明实施例提出的另一种基站的结构示意图。 具体实施方式
如背景技术所述, 现有的 CBF方案中需要将每个子帧内的子带上的 调度信息传递给进行协作传输的协作小区, 因此, 产生了大量的信息流 量, 对于传输调度信息的接口造成了很大的负担, 在具体的应用场景中, 尤其对于 X2接口具有很大的资源开销需求,从而影响了网络的实际应用 效果。
针对上述问题, 可以通过在进行协作传输的各小区的基站之间传递 预调度信息的方式, 使相应的基站根据预调度信息进行协同调度 /波束赋 形。
基于上述的技术思路, 本发明实施例提出了一种小区间进行空间协 调的方法, 应用于包括多个小区的移动通信系统中, 多个小区中的一个 小区为终端的服务小区, 其他小区中的一个或多个为终端的协作小区, 各小区所对应的基站为终端提供协同传输服务。
如图 3所示, 为本发明实施例所提出的一种小区间进行空间协调的方 法的流程示意图, 具体包括以下步骤:
步骤 S301、 基站获取服务小区的基站到终端的信道信息。
其中, 基站获取服务小区的基站到终端的信道信息, 具体包括以下 两种情况:
( 1 )服务小区的基站接收终端上报的信道信息。
在这种情况下, 终端直接向基站发送自身的信道信息, 基站直接根 据接收到的信道信息确定服务小区的基站到终端的信道信息。
( 2 )服务小区的基站接收终端发送的 SRS ( Sounding Reference Signal, 信道探测参考信号), 并根据 SRS信号获取终端的信道信息。
在这种情况下, 终端需要向基站发送 SRS信号, 在此之前, 服务小区 的基站直接向待调度终端发送 SRS调度信息, 不仅如此,服务小区的基站 还需要向协作小区的基站发送 SRS调度信息, 并且,协作小区的基站还需 要接收终端按照相应指示而发送的 SRS信号。
在具体的应用场景中,可以根据具体系统需求进行上述 SRS相关策略 的调整, 具体应用以上哪种策略并不影响本发明的保护范围。
另一方面, 基站获取服务小区的基站到终端的信道信息的同时, 还 可以同时获取协作小区的基站到终端的信道信息, 该信道信息具体包括 以下几种类型:
( 1 )十办作小区的 WPI ( Worst Precoding matrix Indicator, 最差预编码 矩阵指示), 即协作小区中最差的预编码矩阵的相关信息, 这样的信息表 示协作小区不适宜使用该 WPI对应的预编码矩阵为协作小区内的终端进 行预编码处理。
( 2 )协作小区的 BPI ( Best Precoding matrix Indicator, 最优预编码矩 阵指示), 即协作小区中最优的预编码矩阵的相关信息, 这样的信息表示 协作小区可优先考虑使用 BPI对应的预编码矩阵为协作小区内的终端进 行预编码处理。 ( 3 )协作小区的基站发送的预调度信息中所包含的预编码矩阵占用 信息。
这种方式主要是考虑当前的基站是本终端的服务小区的基站, 但可 能同时又是其他终端的协作小区的基站, 因此, 基站还可能接收到其他 协作小区的基站所发送的预调度信息, 这些预调度信息中同样会涉及当 前系统中的资源占用情况, 从而, 根据这些资源占用信息, 基站可以在 相应的预调度处理中, 对相应的资源进行合理分配, 避免将干扰大的资 源进行分配。
( 4 )协作小区的基站接收终端发送的 SRS信号, 并根据 SRS信号获 取终端的信道信息。
( 5 )协作小区的基站到 UE的信道状态信息本身。
其中, 上述的 (1 )、 (2 )、 (3 )、 ( 5 )所对应的信道信息可以是由 UE 反馈到其服务小区的基站, 也可以是由 UE反馈到协作小区的基站。
这里需要说明, UE为每个协作小区上报的 BPI和 WPI可以多于 1个, 分别对应着干扰最弱的一个或多个预编码矩阵和干扰最强的一个或多个 预编码矩阵。
步骤 S302、 服务小区的基站根据获取到的终端的信道信息, 以及终 端的业务要求对终端进行预调度。
如果如上述步骤 S301中所述, 基站还接收到协作小区的基站发送过 来的 PMI ( Precoding Matrix Indicator, 预编码矩阵指示)和 /或 WPI信息, 本步骤的具体处理流程具体分为以下三种情况:
情况一、 当基站接收到协作小区的基站发送过来的预调度信息中包 含 WPI时, 该基站根据该 WPI信息, 以及终端上报的 PMI信息和终端的业 务要求进行预调度, 基站对终端进行预调度时尽量避免占用上述的 WPI 所对应的资源。
在此种情况下, 当基站接收到协作小区的基站发送的预调度信息时, 首先确定每个子带上协作小区预调度了哪几个 UE, 分别对应着什么空间 信息。 例如协作小区在一个子带上预调度了 2个 UE,分别为 UE1和 UE2, UE1 在该子带上的 WPI为 WPIl , UE2在该子带上的 WPI为 WPI2。 则预调度方 法为,在该子带上,如果一个终端上报的 PMI对应的预编码矩阵或者根据 信道信息计算出来的预编码矩阵和(WPI1或 WPI2 )对应的预编码矩阵相 同或相近, 则基站在该子带上应避免调度该 UE。
情况二、 当基站接收到协作小区的基站发送过来的 BPI时, 该基站根 据该 BPI信息, 以及终端上报的 PMI和 WPI信息和终端的业务要求, 则基 在此种情况下, 当基站接收到协作小区的基站发送的预调度信息时, 首先确定每个子带上协作小区预调度了哪几个 UE, 分别对应着什么空间 信息。
例如协作小区在一个子带上预调度了 2个 UE,分别为 UE1和 UE2, UE1 在该子带上的 BPI为 BPI1 , UE2在该子带上的 BPI为 BPI2。 则预调度方法 为,在该子带上,如果一个终端上报的 PMI对应的预编码矩阵或者根据信 道信息计算出来的预编码矩阵和(BPI1或 BPI2 )对应的预编码矩阵相同 或相近, 则基站在该子带上应优先调度该 UE。
情况三、 当基站接收到其他协作小区的基站发送过来的资源占用信 息时, 该基站根据上述资源占用信息, 以及终端上报的 PMI和 WPI信息和 终端的业务要求, 选择干扰最小的资源对终端进行预调度。
在此种情况下, 当基站接收到协作小区的基站发送的预调度信息时, 首先确定每个子带上协作小区预调度了哪几个 UE, 分别对应着什么空间 信息, 并选择干扰最小的资源对终端进行预调度。
步骤 S303、 服务小区的基站将预调度信息传递给协作小区的基站, 使协作小区的基站根据收到的预调度信息进行协同调度 /协同波束赋形。
在具体的应用场景中, 预调度信息具体包括:
终端的标识信息, 终端被分配的资源信息和 /或终端在对应的资源上 的空间信息。
根据是否包含终端在对应的资源上的空间信息, 本步骤的后续处理 流程也分为两种情况: 情况一、 预调度信息包含终端在对应的资源上的空间信息
当终端在对应的资源上的信道信息具体为终端在对应的资源上的
WPI时,服务小区的基站根据预调度信息与协作小区的基站一起进行协同 调度 /协同波束赋形, 具体为:
协作小区可以通过以下公式计算待调度终端的预编码矩阵:
-1
+ al)
Figure imgf000011_0001
其中, H是待调度的终端的信道矩阵;
V是 WPI对应的预编码矩阵;
"是正则化因子;
F!是待调度的终端的预编码矩阵。
或者筒单的,协作小区只是以较低的优先级调度上报的 PMI与协作小 区的基站传递的 WPI相同或者相近的终端。
当终端在对应的资源上的信道信息具体为终端在对应的资源上的 BPI时, 协作小区的基站根据预调度信息, 以高优先级调度上报的 PMI与 协作 d、区的基站传递的 BPI相同或者相近的终端。
情况二、 预调度信息不包含终端在对应的资源上的信道信息 由于协作小区的基站可以根据终端发送的 SRS信号获得终端到协作 小区的信道信息, 所以, 协作小区的基站可以直接根据终端的标识信息 和终端被分配的资源信息, 进行协同调度 /协同波束赋形, 具体包括以下 两种方式:
( 1 )协作小区的基站保证服务小区中待调度的终端与协作小区中可 能调度的终端到达服务小区的基站的方向角间隔高于预设阈值。
( 2 )协作小区通过以下公式计算终端可应用的预编码矩阵资源:
+ αΙ)~
Figure imgf000011_0002
其中 rt i是服务小区中的待调度的终端的信道矩阵;
H
2是协作小区的终端的信道矩阵;
是正则化因子; 1是待调度的终端的预编码矩阵。
情况三、 预调度信息中包含终端在其协作小区内对应资源上的信道 状态信息本身。
具体的处理方式和情况二的处理方法类似。
情况四、 预调度信息中包含终端在其服务小区内对应资源上使用的 预编码矩阵对应的 PMI。
需要进一步说明的是, 作为服务小区的基站同样可以接收到协作 d、 区的基站发送的针对协作小区中的终端进行调度的预调度信息, 具体的 处理过程包括:
( 1 )服务小区的基站接收协作小区的基站所发送的预调度信息和服 务小区中待调度的终端的信道信息。
其中, 服务小区的基站接收的协作小区的基站传递的预调度信息, 具体包括:
协作小区预调度的终端的标识信息, 协作小区预调度的终端被分配 的资源信息和 /或协作小区预调度的终端在对应的资源上的预编码矩阵信 服务小区中待调度的终端的信道信息, 具体包括:
月良务小区中的终端的标识信息, 终端被分配的资源信息和 /或终端在 对应的资源上的预编码矩阵信息。
( 2 )服务小区的基站根据预调度信息和服务小区中待调度的终端的 信道信息进行协同调度 /协同波束赋形。
具体处理过程包括:
服务小区的基站保证服务小区中待调度的终端与协作小区中预调度 的终端到达服务小区的基站的方向角间隔高于预设阈值; 或,
服务小区的基站根据待调度终端的信道信息和协作小区预调度的终 端被分配的资源信息和 /或终端在对应的资源上的预编码矩阵信息, 计算 待调度终端的预编码矩阵。
与现有技术相比, 本发明实施例具有以下优点: 通过应用本发明实施例的技术方案, 使协作传输的各小区的基站之 间传递预调度信息, 并根据预调度信息进行协同调度 /波束赋形, 从而, 以较少的信息交互量实现了协同调度 /波束赋形, 提高了各小区边缘终端 的频谱调度效率。 下面, 结合具体的应用场景, 对本发明实施例所提出的技术方案进 行说明。
具体的说明流程分为三种方案, 相应的说明如下:
如图 4所示, 为本发明实施例所提出了具体应用场景下的一种小区间 进行空间协调的方法的流程示意图, 具体包括以下步骤:
步骤 S401、 UE向服务小区的基站上报 PMI和 WPI。
一方面, UE根据服务小区的基站到 UE的信道选择预编码矩阵, 通过 向基站发送 PMI的方式上 4艮。
即 UE将选中的预编码矩阵在一个码本集合中的索引值上报给基站。
PMI选取的准则可以如下:
PMI= arg maxke{1 2 N} II II2
其中, N是码本集合中元素的个数,
W,---^ }是预先定义好的码本,
Hi是服务小区的基站到 UE的信道矩阵。
另一方面, UE根据协作小区的基站到 UE的信道选择预编码矩阵, 选 取的是对 UE产生最大干扰的预编码矩阵,同样是从一个码本集合中选取, 选中的预编码矩阵在码本中的索引记为 WPI。
WPI的含义是, 如果该 UE在某个子带上被调度了, 协作小区在相应 就是说协作小区应尽量避免使用该 WPI对应的预编码矩阵。
UE将协作小区的 WPI上报给服务小区。 WPI选取的准则可以如下: WPI = argmaxke{1 2 N} II H2Vk II2
其中, N是码本集合中元素的个数, H2是协作小区的基站到 UE的信道矩阵;
{ !,···,νΝ }是预先定义好的码本。
ΡΜΙ和 WPI的上报可以是宽带上报, 也可以是子带上报。 ΡΜΙ和 WPI 使用的码本可以相同, 也可以不同, 不仅如此, 上述的 ΡΜΙ和 WPI的选取 准则仅是本发明的一种优选实施例, 可以根据具体系统的需求进行变化, 这样的变化并不影响本发明的保护范围。
步骤 S402、 基站根据该小区内的 UE上报的 PMI和 WPI信息和协作小 区的基站传递过来的 WPI信息, 以及 UE的业务要求为 UE预分配频率资 源。
在此基础上, 该 UE在将来一段时间内会被调度在预分配的资源内。 不同 UE预分配的资源在频率域内可以重迭。 一种较优的做法是, 要求频 率资源重迭的 UE上报的协作小区的 WPI相同或相近。
步骤 S403、 基站把确定的每个 UE预分配的资源信息传递给协作小区 的基站。
传递的信息包括: UE标识, 该 UE分配的资源 (子带), 该 UE在相 应的协作小区中的 WPI信息。
需要说明的是, UE上报的 WPI信息是与协作小区对应的, 即 UE在每 一个协作小区都会对应一个 WPI, 因此, 在预调度处理之后, 基站需要向 协作小区的基站传递的是与该协作小区对应的 WPI信息。
步骤 S404、 基站根据服务小区和协作小区预分配的资源信息进行协 同调度。
每个子带上的资源以高优先级分配给预分配的资源中包含该子带的 UE。 此外, 各基站会接收来自协作小区的预调度信息, 因此, 基站在每 个子带进行调度时要尽量避免使用协作小区在该子带上预调度的 UE的 WPI, 或者避免使用与之接近的预编码矩阵。
更进一步的, WPI 实际上可以看作是一种方向信息, 基站在调度时 可以通过信号处理算法如迫零算法(ZF )控制对该方向上的干扰:
Figure imgf000014_0001
其中, H是待调度的 UE的信道矩阵,
V是 WPI对应的预编码矩阵,
α是正则化因子,
是待调度的 UE的预编码向量。
或者筒单的,服务小区只是以较低的优先级调度上报的 ΡΜΙ与协作小 区的基站传递的 WPI相同或者相近的终端。
在此种方案下, 当 UE所上报的信息为 ΒΡΙ时, 上述的技术方案具体 调整为以下步骤, 具体如图 5所示, 包括以下步骤:
步骤 S501、 UE向服务小区的基站上报 ΡΜΙ和 ΒΡΙ。
与前述的步骤 S401相似, UE根据服务小区的基站到 UE的信道选择预 编码矩阵, 通过向基站发送 ΡΜΙ的方式上报。
另一方面, UE根据协作小区的基站到 UE的信道选择预编码矩阵, 选 取的是对 UE产生最小干扰的预编码矩阵,同样是从一个码本集合中选取, 选中的预编码矩阵在码本中的索引记为 ΒΡΙ。
BPI的含义是, 如果该 UE在某个子带上被调度了, 协作小区在相应 扰, 也就是说协作小区应优先使用该 BPI对应的预编码矩阵。
PMI和 BPI的上报可以是宽带上报, 也可以是子带上报。 PMI和 BPI 使用的码本可以相同, 也可以不同, 不仅如此, 上述的 PMI和 BPI的选取 准则形式的变化并不影响本发明的保护范围。
步骤 S502、基站根据该小区内的 UE上报的 PMI和 BPI信息和协作小区 的基站传递过来的 BPI信息, 以及 UE的业务要求为 UE预分配频率资源。
在此基础上, 该 UE在将来一段时间内会被调度在预分配的资源内。 不同 UE预分配的资源在频率域内可以重迭。 一种较优的做法是, 要求频 率资源重迭的 UE上报的协作小区的 BPI相同或相近。
步骤 S503、 基站把确定的每个 UE预分配的资源信息传递给协作小区 的基站。
传递的信息包括: UE标识, 该 UE分配的资源 (子带), 该 UE在相 应的协作小区中的 BPI信息。 需要说明的是, UE上报的 BPI信息是与协作小区对应的, 即 UE在每 一个协作小区都会对应一个 BPI, 因此, 在预调度处理之后, 基站需要向 协作小区的基站传递的是与该协作小区对应的 BPI信息
步骤 S504、 基站根据服务小区和协作小区预分配的资源信息进行协 同调度。
每个子带上的资源以高优先级分配给预分配的资源中包含该子带的 UE。 此外, 各基站会接收来自协作小区的预调度信息, 因此, 基站在每 个子带进行调度时要尽量优先使用协作小区在该子带上预调度的 UE的 BPI, 或者优先使用与之接近的预编码矩阵。
综上所述, 在对应的资源上的信道信息具体为终端在对应的资源上 的 BPI时, 协作小区的基站根据预调度信息, 以高优先级调度上报的 PMI 与协作小区的基站传递的 BPI相同或者相近的终端。
如图 6所示, 为本发明实施例所提出了具体应用场景下的另一种小区 间进行空间协调的方法的流程示意图, 具体包括以下步骤:
步骤 S601、 基站将 UE的 SRS调度信息传递给协作小区的基站。
传递的信息包括 SRS调度的周期,子帧偏移,基序列,时频资源位置, 循环移位值等。
步骤 S602、 UE按照服务小区的基站指示的资源发送 SRS信号。
步骤 S603、 UE的服务小区的基站和协作小区的基站估计 UE到各自的 信道信息。
由于在步骤 S601中, UE的 SRS调度信息已经传递到协作小区的基站, 因此协作小区的基站可以估计出 UE的信道信息。
步骤 S604、基站根据该小区内的 UE信道信息, 以及 UE的业务要求为 UE预分配频率资源。
即该 UE在将来一段时间内会被调度在预分配的资源内。不同 UE预分 配的资源在频率域内可以重迭。 一种较优的做法是, 要求频率资源重迭 的 UE的到达方向角 Do A相同或者接近。
步骤 S605、 基站把确定的每个 UE预分配的资源信息传递给协作小区 的基站。 其中, 传递的信息包括: UE ID, 该 UE分配的资源 (或者子带)。 步骤 S606、 基站根据服务小区和协作小区 UE预分配的资源信息进行 协同调度。
每个子带上的资源以高优先级分配给预分配的资源中包含该子带的 UE。 此外, 各基站会接收来自协作小区的预调度信息, 因此, 基站在每 个子带进行调度已知协作小区在该子带上可能会调度哪些 UE, 以及这些 UE的信道信息(步骤 S603中获得)。
基站在进行调度时要根据信道信息避免 /抑制对协作小区可能调度的 UE产生干扰, 具体包括以下两种方法:
方法一、 通过 DoA角度隔离的方法实现, 即服务小区调度的 UE与协 作小区预调度的 UE到达服务小区的基站的方向角间隔应该大于一定值。
方法二、 通过通过信号处理算法如迫零算法(ZF )控制对协作小区 UE的干 4尤:
Π Η
Figure imgf000017_0001
其中, 是服务小区待调度的 UE的信道矩阵,
112是协作小区 UE到服务小区的信道矩阵(这里假定协作小区在该子 带上只预调度了一个 UE ),
α是正则化因子,
是待调度的 UE的预编码矩阵。
如图 7所示, 为本发明实施例所提出了具体应用场景下的另一种小区 间进行空间协调的方法的流程示意图, 具体包括以下步骤:
步骤 S701、 基站将 UE的 SRS调度信息发送给 UE。
传递的信息包括 SRS调度的周期,子帧偏移,基序列,时频资源位置, 循环移位值等。
步骤 S702、 UE按照服务小区的基站指示的资源向基站发送 SRS信号。 步骤 S703、 UE的服务小区的基站估计 UE到各自的信道信息。
步骤 S704、 UE向基站上报 WPI信息。 UE根据协作小区的基站到 UE的信道选择预编码矩阵, 选取的是对
UE产生最大干扰的预编码矩阵, 将选中的预编码矩阵在一个码本集合中 的索引值上报, 选中的预编码矩阵在码本中的索引记为 WPI。 WPI选取的 准则可以如下:
WPI = argmaxke{1 2 N} II H2Vk II2
其中, N是码本集合中元素的个数,
H2是协作小区的基站到 UE的信道矩阵;
{ !,···,νΝ }是预先定义好的码本。
WPI的上报可以是宽带上报, 也可以是子带上报, 不仅如此, 上述的 WPI的选取准则仅是本发明的一种优选实施例,可以根据具体系统的需求 进行变化, 这样的变化并不影响本发明的保护范围。
步骤 S705、 基站根据该小区内的 UE的信道信息和 WPI信息, 以及 UE 的业务要求为 UE预分配频率资源。
该 UE在将来一段时间内会被调度在预分配的资源内。不同 UE预分配 的资源在频率域内可以重迭。 一种优化的做法是, 要求频率资源重迭的 UE上报的协作小区的 WPI相同。
步骤 S706、 基站把确定的每个 UE预分配的资源信息传递给协作小区 的基站。
传递的信息包括: UE标识, 该 UE分配的资源 (子带), 该 UE在对应 子带上的 WPI信息。
步骤 S707、 基站根据服务小区和协作小区预分配的资源信息对进行 协同调度。
每个子带上的资源以高优先级分配给预分配的资源中包含该子带的 UE。 此外, 各基站会接收来自协作小区的预调度信息, 因此, 基站在每 个子带进行调度时要尽量避免使用协作小区在该子带上预调度的 UE的 WPI对应的预编码矩阵, 或者避免使用与之接近的预编码矩阵。
更进一步的, WPI 实际上可以看作是一种方向信息, 基站在调度时 可以通过信号处理算法如迫零算法(ZF )控制对该方向上的干扰:
Figure imgf000019_0001
其中, H是待调度的 UE的信道矩阵,
v是 WPI对应的预编码矩阵,
«是正则化因子,
是待调度的 UE的预编码向量。
需要进一步指出的是, 在上述的如图 4和图 7所示的方案中, UE都上 报了邻区的 WPI, 实际上 UE还可以上报 ΒΡΙ代替 WPI, 即协作小区使用该 ΒΡΙ对应的预编码矩阵会对 UE产生最小的干扰。
这样, 基站在进行调度时要求尽可能使用协作小区在相应子带上预 调度的 UE的 ΒΡΙ。 在上述的如图 4和图 7所示的方案中, 基站之间交互的 WPI或者 ΒΡΙ信息, 既可以是一段时间内统计得到的长时信息, 也可以是 瞬时计算得到短时信息, 这样的变化并不影响本发明的保护范围。
优选地, 在本发明实施例中, 基站之间还可以交互 WPI和 ΒΡΙ信息, 基站在每个子带进行调度时要尽量避免使用协作小区在该子带上预调度 的 UE的 WPI对应的预编码矩阵, 或者避免使用与之接近的预编码矩阵; 同时,基站尽量优先使用协作小区在该子带上预调度的 UE的 ΒΡΙ, 或者优 先使用与之接近的预编码矩阵。 与现有技术相比, 本发明实施例具有以下优点:
通过应用本发明实施例的技术方案, 使协作传输的各小区的基站之 间传递预调度信息, 并根据预调度信息进行协同调度 /波束赋形, 从而, 以较少的信息交互量实现了协同调度 /波束赋形, 提高了各小区边缘终端 的频谱调度效率。
为了实现本发明实施例的技术方案, 本发明实施例还提供了一种基 站, 应用于包括多个小区的移动通信系统中, 多个小区中的一个小区为 终端的服务小区, 其他小区中的一个或多个为终端的协作小区, 各小区 所对应的基站为终端提供协同传输服务。 如图 8所示, 为本发明实施例提供的一种基站, 所述基站与所述服务 小区对应时, 包括:
获取模块 81 , 用于获取终端的信道信息;
其中, 获取模块 81获取终端的信道信息, 具体为:
获取模块接收终端上报的信道信息; 或,
获取模块接收终端发送的 SRS信号, 并根据 SRS信号获取终端的信道 信息。
另一方面, 获取模块 81在获取终端的信道信息的同时, 还可以获取 协作小区的预编码矩阵信息, 具体包括:
协作小区的 WPI; 或,
协作小区的 BPI; 或,
协作小区的基站发送的预调度信息中所包含的预编码矩阵占用信 预调度模块 82, 用于根据获取模块 81所获取到的终端的信道信息, 以及终端的业务要求对终端进行预调度;
发送模块 83, 用于将预调度模块 82所生成的预调度信息传递给协作 小区的基站, 使协作小区的基站根据预调度信息与服务小区的基站一起 进行协同调度 /协同波束赋形。
在具体的应用环境中, 具体的处理过程包括以下三种情况: 当获取模块 81获取到的协作小区的预编码矩阵信息具体为协作小区 的 WPI时,预调度模块 82根据获取模块 81获取到的终端的信道信息和终端 的业务要求, 对终端进行预调度, 预调度模块 82对终端进行预调度时避 免占用 WPI所对应的资源。
当获取模块 81所获取的协作小区的预编码矩阵信息具体为协作小区 的 BPI时,预调度模块 82根据获取模块 81获取到的终端的信道信息和终端 的业务要求, 对终端进行预调度, 预调度模块对终端进行预调度时优先 占用 BPI所对应的资源。
当获取模块 81所获取的协作小区的预编码矩阵信息具体为协作小区 的基站发送的预调度信息中所包含的预编码矩阵占用信息时, 预调度模 块 82根据获取模块 81获取到的终端的信道信息和终端的业务要求, 选择 干扰最小的资源对终端进行预调度。
另一方面, 本发明实施例还提供了另一种基站, 同样应用于上述系 统。
所述基站与所述月良务小区对应时, 其结构示意图如图 9所示, 具体包 括:
接收模块 91 , 用于接收协作小区的基站所发送的预调度信息和服务 小区中待调度的终端的信道信息;
其中, 协作小区的基站传递的预调度信息具体包括终端的标识信息, 终端被分配的资源信息, 终端在对应的资源上的预编码矩阵信息。
服务小区中待调度的终端的信道信息, 具体包括服务小区中的终端 的标识信息, 终端被分配的资源信息和 /或终端在对应的资源上的预编码 矩阵信息。
调度模块 92, 用于根据接收模块 91所接收的预调度信息和服务小区 中待调度的终端的信道信息进行协同调度 /协同波束赋形。
在具体的应用场景中, 当接收模块 91所接收的预调度信息不包含终 端在对应的资源上的预编码矩阵信息时, 调度模块 92的具体处理过程为: 调度模块 92保证服务小区中待调度的终端与协作小区中预调度的终 端到达服务小区的基站的方向角间隔高于预设阈值; 或,
调度模块 92根据待调度终端的信道信息和协作小区预调度的终端被 分配的资源信息和 /或终端在对应的资源上的预编码矩阵信息, 计算待调 度终端的预编码矩阵。
与现有技术相比, 本发明实施例具有以下优点:
通过应用本发明实施例的技术方案, 使协作传输的各小区的基站之 间传递预调度信息, 并根据预调度信息进行协同调度 /波束赋形, 从而, 以较少的信息交互量实现了协同调度 /波束赋形, 提高了各小区边缘终端 的频谱调度效率。
通过以上的实施方式的描述, 本领域的技术人员可以清楚地了解到 本发明实施例可以通过硬件实现, 也可以借助软件加必要的通用硬件平 台的方式来实现。 基于这样的理解, 本发明实施例的技术方案可以以软 件产品的形式体现出来, 该软件产品可以存储在一个非易失性存储介质
(可以是 CD-ROM, U盘, 移动硬盘等)中, 包括若干指令用以使得一台 计算机设备(可以是个人计算机, 服务器, 或者网络设备等)执行本发 明实施例各个实施场景所述的方法。
本领域技术人员可以理解附图只是一个优选实施场景的示意图, 附 图中的模块或流程并不一定是实施本发明实施例所必须的。
本领域技术人员可以理解实施场景中的装置中的模块可以按照实施 场景描述进行分布于实施场景的装置中, 也可以进行相应变化位于不同 于本实施场景的一个或多个装置中。 上述实施场景的模块可以合并为一 个模块, 也可以进一步拆分成多个子模块。
上述本发明实施例序号仅仅为了描述, 不代表实施场景的优劣。 实施例并非局限于此, 任何本领域的技术人员能思之的变化都应落入本 发明实施例的业务限制范围。

Claims

权利要求
1、 一种小区间进行空间协调的方法, 应用于包括多个小区的移 动通信系统中, 所述多个小区中的一个小区为终端的服务小区, 其他 小区中的一个或多个为所述终端的协作小区,各所述小区所对应的基 站为所述终端提供协同传输服务, 其特征在于, 包括:
所述服务小区的基站获取所述终端的信道信息;
所述服务小区的基站根据获取到的所述终端的信道信息, 以及所 述终端的业务要求对所述终端进行预调度;
所述服务小区的基站将预调度信息传递给所述协作小区的基站, 使所述协作小区的基站根据所述预调度信息与所述服务小区的基站 一起进行协同调度 /协同波束赋形。
2、 如权利要求 1所述的方法, 其特征在于, 所述服务小区的基 站获取所述终端的信道信息, 具体为:
所述服务小区的基站接收所述终端上报的信道信息; 或, 所述服务小区的基站接收所述终端发送的信道探测参考信号 SRS信号, 并根据所述 SRS信号获取所述终端的信道信息。
3、 如权利要求 1所述的方法, 其特征在于, 还包括:
所述服务小区的基站获取所述协作小区的预编码矩阵信息; 其中, 所述协作小区的预编码矩阵信息具体包括:
所述协作小区的最差预编码矩阵指示 WPI; 和 /或,
所述协作小区的最优预编码矩阵指示 BPI。
4、 如权利要求 3所述的方法, 其特征在于, 所述服务小区的基 站根据获取到的所述终端的信道信息,以及所述终端的业务要求对所 述终端进行预调度, 具体为:
当所述协作小区的预编码矩阵信息为所述协作小区的 WPI 时, 所述服务小区的基站根据获取到的所述终端的信道信息和所述终端 的业务要求, 对所述终端进行预调度, 所述基站对所述终端进行预调 度时避免占用所述 WPI对应的资源; 和 /或, 当所述协作小区的预编码矩阵信息为所述协作小区的 BPI时,所 述服务小区的基站根据获取到的所述终端的信道信息和所述终端的 业务要求, 对所述终端进行预调度, 所述基站对所述终端进行预调度 时优先占用所述 BPI对应的资源。
5、 如权利要求 3所述的方法, 其特征在于, 所述协作小区的预 编码矩阵信息还包括:
所述协作小区的基站发送的预调度信息中包含的预编码矩阵占 用信息;
其中, 当所述协作小区的预编码矩阵信息为所述协作小区的基站 发送的预调度信息中包含的预编码矩阵占用信息时,所述服务小区的 基站根据获取到的所述终端的信道信息和所述终端的业务要求,选择 干扰最小的资源对所述终端进行预调度。
6、 如权利要求 1所述的方法, 其特征在于, 所述服务小区的基 站向所述协作小区的基站传递的预调度信息, 具体包括:
所述终端的标识信息, 所述终端被分配的资源信息和 /或所述终 端在对应的资源上的空间信息。
7、 一种小区间进行空间协调的方法, 应用于包括多个小区的移 动通信系统中, 所述多个小区中的一个小区为终端的服务小区, 其他 小区中的一个或多个为所述终端的协作小区,各所述小区所对应的基 站为所述终端提供协同传输服务, 其特征在于, 包括:
所述服务小区的基站接收所述协作小区的基站发送的预调度信 息和所述服务小区中待调度的终端的信道信息;
所述服务小区的基站根据所述预调度信息和所述服务小区中待 调度的终端的信道信息进行协同调度 /协同波束赋形。
8、 如权利要求 7所述的方法, 其特征在于, 所述服务小区的基 站接收的所述协作小区的基站发送的预调度信息, 具体包括:
协作小区预调度的终端的标识信息,所述协作小区预调度的终端 被分配的资源信息和 /或所述协作小区预调度的终端在对应的资源上 的空间信息。
9、 如权利要求 7所述的方法, 其特征在于, 所述服务小区中待 调度的终端的信道信息, 具体包括:
所述服务小区中待调度的终端的标识信息,所述终端被分配的资 源信息和 /或所述终端在对应的资源上的空间信息。
10、 如权利要求 7所述的方法, 其特征在于, 所述服务小区的基 站根据所述预调度信息和所述服务小区中待调度的终端的信道信息 进行协同调度 /协同波束赋形, 具体为:
所述服务小区的基站保证所述服务小区中待调度的终端与所述 协作小区预调度的终端到达所述服务小区的基站的方向角间隔高于 预设阈值; 或,
所述服务小区的基站根据待调度的终端的信道信息和所述协作 小区预调度的终端被分配的资源信息和 /或所述协作小区预调度的终 端在对应的资源上的预编码矩阵信息,计算待调度的终端的预编码矩 阵。
11、 一种基站, 应用于包括多个小区的移动通信系统中, 所述多 个小区中的一个小区为终端的服务小区,其他小区中的一个或多个为 所述终端的协作小区,各所述小区所对应的基站为所述终端提供协同 传输服务, 其特征在于, 所述基站与所述服务小区对应时, 包括: 获取模块, 用于获取所述终端的信道信息;
预调度模块,用于根据所述获取模块获取到的所述终端的信道信 息, 以及所述终端的业务要求对所述终端进行预调度;
发送模块,用于将所述预调度模块生成的预调度信息传递给所述 协作小区的基站,使所述协作小区的基站根据所述预调度信息与所述 服务小区的基站一起进行协同调度 /协同波束赋形。
12、 如权利要求 11所述的基站, 其特征在于,
所述获取模块, 具体用于接收所述终端上报的信道信息; 或, 接收所述终端发送的 SRS信号, 并根据所述 SRS信号获取所述 终端的信道信息。
13、 如权利要求 11所述的基站, 其特征在于, 所述获取模块, 还用于获取所述协作小区的预编码矩阵信息; 其中, 所述协作小区的预编码矩阵信息具体包括:
所述协作小区的 WPI; 和 /或,
所述协作小区的 BPI。
14、 如权利要求 13所述的基站, 其特征在于, 所述预调度模块 具体用于:
当所述获取模块获取到的所述协作小区的预编码矩阵信息为所 述协作小区的 WPI时, 根据所述获取模块获取到的所述终端的信道 信息和所述终端的业务要求, 对所述终端进行预调度, 所述预调度模 块对所述终端进行预调度时避免占用所述 WPI对应的资源; 和 /或, 当所述获取模块获取到的所述协作小区的预编码矩阵信息为所 述协作小区的 BPI时,根据所述获取模块获取到的所述终端的信道信 息和所述终端的业务要求, 对所述终端进行预调度, 所述预调度模块 对所述终端进行预调度时优先占用所述 BPI所对应的资源。
15、 如权利要求 13所述的基站, 其特征在于,
所述获取模块,还用于获取所述协作小区的基站发送的预调度信 息中包含的预编码矩阵占用信息;
所述预调度模块,还用于当所述获取模块所获取到的所述协作小 区的预编码矩阵信息为所述协作小区的基站发送的预调度信息中包 含的预编码矩阵占用信息时,根据所述获取模块获取到的所述终端的 信道信息和所述终端的业务要求,选择干扰最小的资源对所述终端进 行预调度。
16、 一种基站, 应用于包括多个小区的移动通信系统中, 所述多 个小区中的一个小区为终端的服务小区,其他小区中的一个或多个为 所述终端的协作小区,各所述小区所对应的基站为所述终端提供协同 传输服务, 其特征在于, 所述基站与所述服务小区对应时, 包括: 接收模块,用于接收所述协作小区的基站发送的预调度信息和所 述服务小区中待调度的终端的信道信息; 调度模块,用于根据所述接收模块接收的预调度信息和所述服务 小区中待调度的终端的信道信息进行协同调度 /协同波束赋形。
17、 如权利要求 16所述的基站, 其特征在于, 所述调度模块具 体用于:
保证所述服务小区中待调度的终端与所述协作小区预调度的终 端到达所述服务小区的基站的方向角间隔高于预设阈值; 或,
根据待调度的终端的信道信息和所述协作小区预调度的终端被 分配的资源信息和 /或所述协作小区预调度的终端在对应的资源上的 预编码矩阵信息, 计算待调度终端的预编码矩阵。
PCT/CN2010/077428 2009-09-29 2010-09-28 小区间进行空间协调的方法和设备 WO2011038675A1 (zh)

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