CN104581961A - Downlink coordinated multipoint joint transmission method and device - Google Patents
Downlink coordinated multipoint joint transmission method and device Download PDFInfo
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- CN104581961A CN104581961A CN201510047114.6A CN201510047114A CN104581961A CN 104581961 A CN104581961 A CN 104581961A CN 201510047114 A CN201510047114 A CN 201510047114A CN 104581961 A CN104581961 A CN 104581961A
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- 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
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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Abstract
The invention discloses a downlink coordinated multipoint joint transmission method and device. By the downlink coordinated multipoint joint transmission method and device, resources of coordinated cells for transmitting coordinated data can be distributed to user equipment (UE) in the coordinated cells or are used for coordinated transmission of several primary cells, thus, output of the coordinated cells is increased, flexibility in dispatching of the coordinated cells is improved, so that CoMP JT technology is applicable to the conditions that the coordinated cells are low in load or high in load. The downlink coordinated multipoint joint transmission method includes paring UE by the coordinated cells to obtain paired UE, the paired UE comprises at least two UE including UE requiring coordinated transmission in the primary cells and UE in the coordinated cells, or one or more UE requiring coordinated transmission in the primary cells; the coordinated cells transmit data to the paired UE, time-frequency resources used by different transmission data of the UE in the paired UE have coincided part.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of down collaboration multi-point joint transmission method and device.
Background technology
See Fig. 1, descending coordination multi-point joint transmission (Coordinated MultiPoint JointTransmission, CoMP JT) technology, namely on same running time-frequency resource, multiple transfer point transmits data to a UE simultaneously, and the signal from multiple transfer point aloft superposes, and receiving end signal is strengthened, interference source reduces simultaneously, and interference dies down.
See Fig. 2, traditional descending CoMP JT technology, is divided into two parts by the resource of the sending point that cooperates (community):
Cooperation resource: namely cooperation sends the resource that community is used for transmitting to main sending point (community) owning user data, this resource sends the copy that a main plot sends data, because main plot is different with the cell ID of cooperation cell, this data trnascription may need punching with the public reference signal of cooperative transmission community (CommonReference Signal, CRS), this is called cooperation transmission data by the data of main plot and cooperation cell common transport.
Dedicated resources: namely cooperation sends the resource that community is used for these community owning user transmission data.
Therefore, traditional descending CoMP JT technology decreases cooperation cell private resource, thus reduces the throughput of this community, and limits the flexibility of cooperation cell scheduling.
Cooperate with Liang Ge community below, it is example that each cell downlink has Release 9 version that 8 antennas carry out transfer of data, and existing LTE descending CoMP JT transmission plan comprises:
Main plot uplink receiving end judges this subscriber equipment whether as CoMP user equipment according to the measurement reported result of the channel situation of each subscriber equipment, and CoMP user equipment is then that it selects cooperation cell according to neighbor cell to the measurement result of this user device channel situation in this way.The information such as the Physical Resource Block (Physical Resource Block, PRB) that the data that main plot sends to cooperation cell transmission cooperation request, cooperation, transmission take.If cooperation request is agreed in response main plot, cooperation cell, then subscriber equipment adopts JT transmission for this reason.
Main plot and cooperation cell downlink end 16 antenna united beam form-endowings carry out downlink transfer, or main plot and cooperation cell downlink end 8 antennas respectively wave beam forming carry out downlink transfer.
Cooperation cell sends at the running time-frequency resource identical with main plot the copy that a main plot sends data, because main plot is different with the cell ID of cooperation cell, this data trnascription may need punching with the CRS of cooperative transmission community, these data send to the subscriber equipment being subordinate to main plot, and this subscriber equipment can be one or more.
The transmission of cooperation transmission data adopts the antenna port five of transmission mode seven, or the antenna port seven of transmission mode eight is or/and eight, and subscriber equipment special reference signal (UE-specific Reference Signal is transmitted in corresponding physical layer resources block position, URS), the position of this URS and sequence are determined according to the physical-layer cell identifier (PCI) of main plot, transmit after URS figuration.
The resource of the cooperation transmission data of distributing is sent by the Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) of main plot.
But, existing descending CoMP JT technology, cooperation cell is used for the subscriber equipment that the resource of cooperation transmission only distributes to a main plot and uses, because this reducing cooperation cell private resource, reduce the throughput of this community, and limit the flexibility of cooperation cell scheduling.
Summary of the invention
Embodiments provide a kind of down collaboration multi-point joint transmission method and device, in order to realize the resource of cooperation cell for cooperative transmission data, the subscriber equipment in cooperation cell can be distributed to simultaneously, or for the cooperation transmission of multiple main plot, improve the throughput of cooperation cell, and add the flexibility of cooperation cell scheduling, make CoMP JT technology not be only applicable to the lower situation of cooperation cell load, be applicable to the situation that cooperation cell load is higher simultaneously.
A kind of down collaboration multi-point joint transmission method that the embodiment of the present invention provides, comprising:
Cooperation cell is user equipment (UE) pairing, obtains matching UE, at least there are two UE in wherein said pairing UE, comprises in main plot the UE and the UE in this cooperation cell that need cooperation transmission, or comprises the UE needing cooperation transmission in one or more main plot;
Described cooperation cell sends data to pairing UE, and the running time-frequency resource wherein used to the different UEs transmission data in pairing UE exists intersection.
Pass through the method, cooperation cell is UE pairing, data are sent to pairing UE, there is intersection in the running time-frequency resource wherein used to the different UEs transmission data in pairing UE, wherein at least there are two UE in pairing UE, comprise in main plot the UE and the UE in this cooperation cell that need cooperation transmission, or comprise the UE needing cooperation transmission in multiple main plot, thus achieve the resource of cooperation cell for cooperative transmission data, the subscriber equipment in cooperation cell can be distributed to simultaneously, or for the cooperation transmission of multiple main plot, improve the throughput of cooperation cell, and add the flexibility of cooperation cell scheduling, CoMP JT technology is made not to be only applicable to the lower situation of cooperation cell load, be applicable to the situation that cooperation cell load is higher simultaneously.
Preferably, when described pairing UE comprises in main plot the UE in the UE and this cooperation cell needing cooperation transmission, described cooperation cell is UE pairing, obtains matching UE, comprising:
Described cooperation cell is according to the Sounding Reference Signal SRS needing a UE of cooperation transmission to report in main plot, and the SRS that the 2nd UE in this cooperation cell reports, calculate the channel function of a UE and cooperation cell and the channel function of the 2nd UE and cooperation cell, and calculate the channel relevancy of a UE and the 2nd UE according to a UE and the channel function of cooperation cell and the channel function of the 2nd UE and cooperation cell;
When this channel relevancy is less than predetermined threshold value, determine that a UE and the 2nd UE is for matching UE.
Preferably, when described pairing UE comprises the UE needing cooperation transmission in one or more main plot, described cooperation cell is UE pairing, obtains matching UE, comprising:
Described cooperation cell is according to the SRS needing multiple UE of cooperation transmission to report in one or more main plot, calculate the channel function of each UE in described multiple UE and cooperation cell, and for any two UE in described multiple UE, according to the channel function of these two UE and cooperation cell, calculate the channel relevancy of these two UE, when this channel relevancy is less than predetermined threshold value, determine that these two UE are for pairing UE.
Preferably, described cooperation cell also sends subscriber equipment specific reference signals URS while sending data to pairing UE.
Preferably, described cooperation cell also sends subscriber equipment specific reference signals URS, specifically comprises while sending data to pairing UE:
Described cooperation cell adopts the antenna port five of transmission mode seven, or the antenna port seven of transmission mode eight is or/and antenna port eight, and transmission data and subscriber equipment specific reference signals URS are to pairing UE.
Preferably, described data and URS are data after wave beam forming and URS.
A kind of down collaboration multi-point joint transmission device that the embodiment of the present invention provides, comprising:
First module, for being user equipment (UE) pairing in cooperation cell, obtaining matching UE, in wherein said pairing UE, at least there are two UE, comprise in main plot the UE and the UE in this cooperation cell that need cooperation transmission, or comprise the UE needing cooperation transmission in one or more main plot;
Second unit, for sending data in described cooperation cell to pairing UE, there is intersection in the running time-frequency resource wherein used to the different UEs transmission data in pairing UE.
Preferably,
When described pairing UE comprises in main plot the UE in the UE that needs cooperation transmission and this cooperation cell, described first module specifically for:
According to the Sounding Reference Signal SRS needing a UE of cooperation transmission to report in main plot, and the SRS that the 2nd UE in this cooperation cell reports, calculate the channel function of a UE and cooperation cell and the channel function of the 2nd UE and cooperation cell, and calculate the channel relevancy of a UE and the 2nd UE according to a UE and the channel function of cooperation cell and the channel function of the 2nd UE and cooperation cell;
When this channel relevancy is less than predetermined threshold value, determine that a UE and the 2nd UE is for matching UE.
Preferably,
When described pairing UE comprises the UE needing cooperation transmission in one or more main plot, described first module specifically for:
According to the SRS needing multiple UE of cooperation transmission to report in one or more main plot, calculate the channel function of each UE in described multiple UE and cooperation cell, and for any two UE in described multiple UE, according to the channel function of these two UE and cooperation cell, calculate the channel relevancy of these two UE, when this channel relevancy is less than predetermined threshold value, determine that these two UE are for pairing UE.
Preferably, described second unit also sends subscriber equipment specific reference signals URS while sending data to pairing UE.
Preferably, described second unit specifically for:
Adopt the antenna port five of transmission mode seven, or the antenna port seven of transmission mode eight is or/and antenna port eight, transmission data and subscriber equipment specific reference signals URS are to pairing UE.
Preferably, described data and URS are data after wave beam forming and URS.
Accompanying drawing explanation
Fig. 1 is that CoMP JT of the prior art transmits schematic diagram;
Fig. 2 is that cooperation cell of the prior art is adopting identical running time-frequency resource to send the schematic diagram of data to the UE being subordinate to main plot with main plot;
The schematic flow sheet of a kind of down collaboration multi-point joint transmission method that Fig. 3 provides for the embodiment of the present invention;
A kind of cooperation cell that Fig. 4 provides for the embodiment of the present invention and main plot collaborative network schematic diagram;
A kind of cooperation cell that Fig. 5 provides for the embodiment of the present invention and main plot cooperation transmission schematic diagram;
The another kind of cooperation cell that Fig. 6 provides for the embodiment of the present invention and main plot cooperation transmission schematic diagram;
The structural representation of a kind of down collaboration multi-point joint transmission device that Fig. 7 provides for the embodiment of the present invention.
Embodiment
Embodiments provide a kind of down collaboration multi-point joint transmission method and device, in order to realize the resource of cooperation cell for cooperative transmission data, the subscriber equipment in cooperation cell can be distributed to simultaneously, or for the cooperation transmission of multiple main plot, improve the throughput of cooperation cell, and add the flexibility of cooperation cell scheduling, make CoMP JT technology not be only applicable to the lower situation of cooperation cell load, be applicable to the situation that cooperation cell load is higher simultaneously.
The embodiment of the present invention utilizes multiple-input and multiple-output (Multiple-Input Multiple-Output, MIMO) character of channel, the number of data streams that can realize transmitting is simultaneously less than or equal to the order (rank) meeting channel, indefinite differentiation cooperation resource and private resource in cooperation cell, namely when cooperation transmission is done in cooperation cell, resource for cooperation transmission still may be used for the user device transmissions data in this community, or cooperation cell is when doing cooperation transmission, resource for cooperation transmission may be used for the user device transmissions data in two or more main plots.This improves the throughput of whole system.
See Fig. 3, a kind of down collaboration multi-point joint transmission method that the embodiment of the present invention proposes, comprising:
S101, cooperation cell are user equipment (UE) pairing, obtain matching UE, at least there are two UE in wherein said pairing UE, comprise in main plot the UE and the UE in this cooperation cell that need cooperation transmission, or comprise the UE needing cooperation transmission in one or more main plot;
S102, described cooperation cell send data to pairing UE, and the running time-frequency resource wherein used to the different UEs transmission data in pairing UE exists intersection.
Namely for the UE in same group, cooperation cell sends the transfer resource that data adopt for wherein each UE, and can there is intersection, can be identical resource, also can there is the identical resource of part.That is, indefinite differentiation cooperation resource and private resource in cooperation cell, namely when cooperation transmission is done in cooperation cell, resource for cooperation transmission still may be used for the user device transmissions data in this community, or cooperation cell is when doing cooperation transmission, the resource for cooperation transmission may be used for the user device transmissions data in two or more main plots.This improves the throughput of whole system.
Preferably, when described pairing UE comprises in main plot the UE in the UE and this cooperation cell needing cooperation transmission, described cooperation cell is UE pairing, obtains matching UE, comprising:
Described cooperation cell is according to the Sounding Reference Signal SRS needing a UE of cooperation transmission to report in main plot, and the SRS that the 2nd UE in this cooperation cell reports, calculate the channel function of a UE and cooperation cell and the channel function of the 2nd UE and cooperation cell, and calculate the channel relevancy of a UE and the 2nd UE according to a UE and the channel function of cooperation cell and the channel function of the 2nd UE and cooperation cell; When this channel relevancy is less than predetermined threshold value, determine that a UE and the 2nd UE is for matching UE.
Wherein, the span of described predetermined threshold value can be such as a real number in 0 ~ 0.7.
As for how described cooperation cell is according to the Sounding Reference Signal SRS needing a UE of cooperation transmission to report in main plot, and the SRS that the 2nd UE in this cooperation cell reports, calculate the channel function of a UE and cooperation cell and the channel function of the 2nd UE and cooperation cell, can existing techniques in realizing be adopted, not repeat them here.
Preferably, when described pairing UE comprises the UE needing cooperation transmission in one or more main plot, described cooperation cell is UE pairing, obtains matching UE, comprising:
Described cooperation cell is according to the SRS needing multiple UE of cooperation transmission to report in one or more main plot, calculate the channel function of each UE in described multiple UE and cooperation cell, and for any two UE in described multiple UE, according to the channel function of these two UE and cooperation cell, calculate the channel relevancy of these two UE, when this channel relevancy is less than predetermined threshold value, determine that these two UE are for pairing UE.
Wherein, the span of this predetermined threshold value can be such as a real number in 0 ~ 0.7.
As for how according to the SRS needing multiple UE of cooperation transmission to report in one or more main plot, calculate the channel function of each UE in described multiple UE and cooperation cell, can existing techniques in realizing be adopted, not repeat them here.
In addition, it should be noted that, in the embodiment of the present invention, also can directly select using the UE in main plot and in cooperation cell arbitrary UE of Stochastic choice as a pair UE, or directly using the UE of two in main plot as a pair UE, these two UE can also can from different main plot from same main plot.Described multiple UE can be two UE also can be more UE.
Preferably, described cooperation cell sends data to pairing UE, comprising:
Described cooperation cell adopts the antenna port five of transmission mode seven, or the antenna port seven of transmission mode eight is or/and antenna port eight, transmission data and subscriber equipment specific reference signals (UE-specificReference Signals, URS) give pairing UE.
Preferably, described data and URS are data after wave beam forming and URS.Concrete how wave beam forming belongs to prior art, does not repeat them here.
The embodiment of the present invention proposes new LTE descending CoMP JT transmission plan, carries out cooperation transmission with Liang Ge community, and each cell downlink adopts 8 antennas to transmit, and Release 9 version is example, is specifically described as follows:
Main plot uplink receiving end is according to the measurement reported result of each user device channel situation, judge this subscriber equipment whether as CoMP user equipment, CoMP user equipment is in this way then this CoMP user equipment choice cooperation cell according to the measurement result of neighbor cell to this CoMP user device channel situation.Main plot sends cooperation request to this cooperation cell, wherein carry need cooperation to send data, send these data and need the information such as the PRB taken.If cooperation request is agreed in response main plot, cooperation cell, then main plot and cooperation cell are determined to adopt CoMP JT transmission for this CoMP user equipment.
Cooperation cell receives one, needs Sounding Reference Signal (the Sounding Reference Signal of the subscriber equipment (i.e. CoMP user equipment) of cooperation transmission in two or more main plot, SRS), and the SRS of this cell user equipment, determine compound channel according to these SRS.Namely described cooperation cell is according to the Sounding Reference Signal SRS needing a UE of cooperation transmission to report in main plot, and the SRS that the 2nd UE in this cooperation cell reports, calculate a UE and the channel function of cooperation cell and the channel function of the 2nd UE and cooperation cell.
See Fig. 4, suppose that the channel H21 between cooperation cell and UE1 and the channel H22 between cooperation cell and UE2 forms a compound channel, the channel H21 between cooperation cell and UE1 and the channel H23 between cooperation cell and UE3 forms another compound channel.Wherein, UE1 belongs to main plot 1, UE2 and belongs to cooperation cell, and UE3 belongs to main plot 2.
Cooperation cell judges the space isolation between subscriber equipment according to compound channel, selects the large subscriber equipment of space isolation to match.The size of space isolation can utilize channel relevancy to weigh, and namely when judging whether UE1 and UE2 can match, adopts following formula:
In formula ()
hrepresent conjugate transpose, || || represent and get norm.Channel relevancy C value is less, and space isolation is larger.A threshold value can be pre-set, if C value is less than predetermined threshold value, then determine that UE1 and UE2 is for pairing UE, otherwise, can not match.
To pairing UE, cooperation cell can utilize the running time-frequency resource overlapping or partially overlap to transmit pairing subscriber equipment, namely cooperation cell sends data to pairing UE, and the running time-frequency resource wherein used to the different UEs transmission data in pairing UE exists intersection, as shown in Figure 5.
In like manner, if cooperation cell receives Sounding Reference Signal (the Sounding Reference Signal of the subscriber equipment (i.e. CoMP user equipment) needing cooperation transmission in two main plots, SRS), compound channel is determined according to these SRS.Namely described cooperation cell is according to the SRS needing multiple UE of cooperation transmission to report in one or more main plot, calculate the channel function of each UE in described multiple UE and cooperation cell, and for any two UE in described multiple UE, according to the channel function of these two UE and cooperation cell, calculate the channel relevancy of these two UE.
With judge whether UE1 and UE2 is match UE in like manner, if determine, UE1 and UE3 also can be pairing UE, then to pairing UE, cooperation cell can utilize the running time-frequency resource overlapping or partially overlap to transmit pairing subscriber equipment, namely cooperation cell sends data to pairing UE, there is intersection in the running time-frequency resource wherein used to the different UEs transmission data in pairing UE, as shown in Figure 6.
Send the process of data to pairing UE about above cooperation cell, specific explanations is as follows:
Cooperation cell is sending at identical running time-frequency resource the copy that a main plot sends data with main plot.Main plot is now one or more, can overlap or partially overlap for giving the running time-frequency resource of multiple main plots cooperation transmission, as shown in Figure 6, the frequency resource that cooperation cell adopts for UE1 cooperation transmission partially overlaps with the frequency resource adopted for UE3 cooperation transmission.
In addition, when main plot is different with the cell ID of cooperation cell, this data trnascription needs punching with the CRS of cooperative transmission community, and this data trnascription sends to the subscriber equipment being subordinate to main plot, and this subscriber equipment can be one or more.Cooperation cell utilizes certain running time-frequency resource, this running time-frequency resource can comprise cooperation resource or overlap with the resource that cooperate or be the part of resource of cooperating, data are sent to the subscriber equipment being subordinate to cooperation cell, as shown in Figure 5, the frequency resource that adopts for UE1 cooperation transmission of cooperation cell with transmit the frequency resource that data adopt for UE2 and partially overlap.
Downlink end 8 antenna united beam form-endowings in main plot carry out down collaboration transmission to CoMP user equipment, downlink end 8 antenna beam figurations in cooperation cell carry out coordination downlink transmission to CoMP user equipment, and downlink end 8 antenna beam figurations in cooperation cell carry out downlink transfer to the subscriber equipment being subordinate to cooperation cell.Cooperation cell is to the common factor part of cooperate resource (resource for cooperation transmission) and dedicated resources (for this community UE being carried out to the resource of transfer of data), or act on the common factor part of resource of multiple main plots cooperation transmission, when carrying out wave beam forming, need to combine consider two parts resources interfere with each other problem, such as transmitting terminal can adopt ZF (Zero Forcing) or block diagonalization (Block Diagonalization) scheduling algorithm to eliminate interference in advance, produces beamformin coefficient.
The transmission of cooperation transmission data adopts the antenna port five of transmission mode seven, or the antenna port seven of transmission mode eight is or/and antenna port eight, and transmit URS in corresponding physical layer resources block position, the position of this URS and sequence can according to the physical-layer cell identifier of main plot (Physical-layer Cell Identitiy, PCI) determine, transmit after URS figuration.Cooperation cell is to this intra-cell users device transmission, adopt the antenna port five of transmission mode seven, or the antenna port seven of transmission mode eight is or/and antenna port eight transmits, and transmit URS in corresponding physical layer resources block position, the position of this URS and sequence are determined according to the PCI of cooperation cell, transmit after URS figuration.
The Resourse Distribute of cooperation transmission data is realized by the PDCCH of main plot, and the distribution of the exclusive transfer resource in cooperation cell is realized by the PDCCH of cooperation cell.
See Fig. 7, a kind of down collaboration multi-point joint transmission device that the embodiment of the present invention provides, comprising:
First module 11, for being user equipment (UE) pairing in cooperation cell, obtaining matching UE, in wherein said pairing UE, at least there are two UE, comprise in main plot the UE and the UE in this cooperation cell that need cooperation transmission, or comprise the UE needing cooperation transmission in one or more main plot;
Second unit 12, in described cooperation cell to pairing UE send data, wherein to pairing UE in different UEs send data use time-frequency time resource there is intersection.
Preferably,
When described pairing UE comprises in main plot the UE in the UE that needs cooperation transmission and this cooperation cell, described first module specifically for:
According to the Sounding Reference Signal SRS needing a UE of cooperation transmission to report in main plot, and the SRS that the 2nd UE in this cooperation cell reports, calculate the channel function of a UE and cooperation cell and the channel function of the 2nd UE and cooperation cell, and calculate the channel relevancy of a UE and the 2nd UE according to a UE and the channel function of cooperation cell and the channel function of the 2nd UE and cooperation cell;
When this channel relevancy is less than predetermined threshold value, determine that a UE and the 2nd UE is for matching UE.
Preferably,
When described pairing UE comprises the UE needing cooperation transmission in one or more main plot, described first module specifically for:
According to the SRS needing multiple UE of cooperation transmission to report in one or more main plot, calculate the channel function of each UE in described multiple UE and cooperation cell, and for any two UE in described multiple UE, according to the channel function of these two UE and cooperation cell, calculate the channel relevancy of these two UE, when this channel relevancy is less than predetermined threshold value, determine that these two UE are for pairing UE.
Preferably, described second unit also sends subscriber equipment specific reference signals URS while sending data to pairing UE.
Preferably, described second unit specifically for:
Adopt the antenna port five of transmission mode seven, or the antenna port seven of transmission mode eight is or/and antenna port eight, transmission data and subscriber equipment specific reference signals URS are to pairing UE.
Preferably, described data and URS are data after wave beam forming and URS.
A kind of down collaboration multi-point joint transmission device that the above embodiment of the present invention provides, such as, is specifically as follows base station; Described first module can be realized by processor, and second unit also can be realized by the processor with transmission-receiving function, or these two unit are realized by same processor.
In sum, in the technical scheme that the embodiment of the present invention provides, cooperation cell judges the space isolation of subscriber equipment according to compound channel, selects the large subscriber equipment of space isolation to match.Cooperation cell can utilize the running time-frequency resource overlapping or partially overlap to transmit pairing subscriber equipment.Cooperation cell is sending with the running time-frequency resource belonging to same cells, main plot the copy that a main plot sends data.Main plot is now one or more, can overlap or partially overlap for giving the running time-frequency resource of multiple main plots cooperation transmission; Cooperation cell sends at the running time-frequency resource identical with main plot the copy that a main plot sends data, and these data send to the subscriber equipment being subordinate to main plot, and this subscriber equipment can be one or more.Meanwhile, cooperation cell utilizes certain running time-frequency resource, and this running time-frequency resource can comprise cooperation resource or overlap with the resource that cooperate or be the part of resource of cooperating, to the subscriber equipment transmission data being subordinate to cooperation cell; The antenna port five of the transmission employing transmission mode seven of cooperation transmission data or the antenna port seven of transmission mode eight are or/and eight, and transmit URS in corresponding physical layer resources block position, the position of this URS and sequence are determined according to the PCI of main plot, transmit after URS figuration.Cooperation cell is subordinate to user device transmissions to this community, adopt the antenna port five of transmission mode seven or the antenna port seven of transmission mode eight or/and eight transmission, and transmit URS in corresponding physical layer resources block position, the position of this URS and sequence are determined according to the PCI of cooperation cell, transmit after URS figuration.
The technical scheme that the embodiment of the present invention provides can reach following beneficial effect:
Cooperation cell is used for the resource of cooperative transmission data can distribute to subscriber equipment in cooperation cell simultaneously, improves the throughput of cooperation cell, and adds the flexibility of cooperation cell scheduling.
Cooperation cell is used for the cooperation transmission that the resource of cooperative transmission data may be used for multiple main plot, improves the throughput of network, and adds the flexibility of scheduling.
The technical scheme that the embodiment of the present invention provides, makes descending CoMP JT technology not be only applicable to the lower situation of cooperation cell load, is applicable to the situation that cooperation cell load is higher simultaneously.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (12)
1. a down collaboration multi-point joint transmission method, is characterized in that, the method comprises:
Cooperation cell is user equipment (UE) pairing, obtains matching UE, at least there are two UE in wherein said pairing UE, comprises in main plot the UE and the UE in this cooperation cell that need cooperation transmission, or comprises the UE needing cooperation transmission in one or more main plot;
Described cooperation cell sends data to pairing UE, and the running time-frequency resource wherein used to the different UEs transmission data in pairing UE exists intersection.
2. method according to claim 1, is characterized in that, when described pairing UE comprises in main plot the UE in the UE and this cooperation cell needing cooperation transmission, described cooperation cell is UE pairing, obtains matching UE, comprising:
Described cooperation cell is according to the Sounding Reference Signal SRS needing a UE of cooperation transmission to report in main plot, and the SRS that the 2nd UE in this cooperation cell reports, calculate the channel function of a UE and cooperation cell and the channel function of the 2nd UE and cooperation cell, and calculate the channel relevancy of a UE and the 2nd UE according to a UE and the channel function of cooperation cell and the channel function of the 2nd UE and cooperation cell;
When this channel relevancy is less than predetermined threshold value, determine that a UE and the 2nd UE is for matching UE.
3. method according to claim 1, is characterized in that, when described pairing UE comprises the UE needing cooperation transmission in one or more main plot, described cooperation cell is UE pairing, obtains matching UE, comprising:
Described cooperation cell is according to the SRS needing multiple UE of cooperation transmission to report in one or more main plot, calculate the channel function of each UE in described multiple UE and cooperation cell, and for any two UE in described multiple UE, according to the channel function of these two UE and cooperation cell, calculate the channel relevancy of these two UE, when this channel relevancy is less than predetermined threshold value, determine that these two UE are for pairing UE.
4. method according to claim 1, is characterized in that, described cooperation cell also sends subscriber equipment specific reference signals URS while sending data to pairing UE.
5. method according to claim 4, is characterized in that, described cooperation cell also sends subscriber equipment specific reference signals URS, specifically comprises while sending data to pairing UE:
Described cooperation cell adopts the antenna port 5 of transmission mode 7, or the antenna port 7 of transmission mode 8 is or/and antenna port 8, and transmission data and subscriber equipment specific reference signals URS are to pairing UE.
6. method according to claim 5, is characterized in that, described data and URS are data after wave beam forming and URS.
7. a down collaboration multi-point joint transmission device, is characterized in that, this device comprises:
First module, for being user equipment (UE) pairing in cooperation cell, obtaining matching UE, in wherein said pairing UE, at least there are two UE, comprise in main plot the UE and the UE in this cooperation cell that need cooperation transmission, or comprise the UE needing cooperation transmission in one or more main plot;
Second unit, for sending data in described cooperation cell to pairing UE, there is intersection in the running time-frequency resource wherein used to the different UEs transmission data in pairing UE.
8. device according to claim 7, is characterized in that,
When described pairing UE comprises in main plot the UE in the UE that needs cooperation transmission and this cooperation cell, described first module specifically for:
According to the Sounding Reference Signal SRS needing a UE of cooperation transmission to report in main plot, and the SRS that the 2nd UE in this cooperation cell reports, calculate the channel function of a UE and cooperation cell and the channel function of the 2nd UE and cooperation cell, and calculate the channel relevancy of a UE and the 2nd UE according to a UE and the channel function of cooperation cell and the channel function of the 2nd UE and cooperation cell;
When this channel relevancy is less than predetermined threshold value, determine that a UE and the 2nd UE is for matching UE.
9. device according to claim 7, is characterized in that,
When described pairing UE comprises the UE needing cooperation transmission in one or more main plot, described first module specifically for:
According to the SRS needing multiple UE of cooperation transmission to report in one or more main plot, calculate the channel function of each UE in described multiple UE and cooperation cell, and for any two UE in described multiple UE, according to the channel function of these two UE and cooperation cell, calculate the channel relevancy of these two UE, when this channel relevancy is less than predetermined threshold value, determine that these two UE are for pairing UE.
10. device according to claim 7, is characterized in that, described second unit also sends subscriber equipment specific reference signals URS while sending data to pairing UE.
11. devices according to claim 10, is characterized in that, described second unit specifically for:
Adopt the antenna port 5 of transmission mode 7, or the antenna port 7 of transmission mode 8 is or/and antenna port 8, transmission data and subscriber equipment specific reference signals URS are to pairing UE.
12. devices according to claim 11, is characterized in that, described data and URS are data after wave beam forming and URS.
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