CN101998301B - Method, device and system for realizing multi-user multiple input multiple output (MIMO) in CoMP scene - Google Patents

Method, device and system for realizing multi-user multiple input multiple output (MIMO) in CoMP scene Download PDF

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CN101998301B
CN101998301B CN 200910163067 CN200910163067A CN101998301B CN 101998301 B CN101998301 B CN 101998301B CN 200910163067 CN200910163067 CN 200910163067 CN 200910163067 A CN200910163067 A CN 200910163067A CN 101998301 B CN101998301 B CN 101998301B
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terminal
user
matrix index
preferred matrix
user terminal
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CN101998301A (en
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陈大庚
马霓
贾祥根
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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
    • H04B7/0417—Feedback systems

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Radio Transmission System (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention discloses a method, a device and a system for realizing multi-user multiple input multiple output (MIMO) in a CoMP scene, which relate to the field of wireless communication and are used for inhibiting paired user interference between multi-user multiple input multiple output (MU-MIMO) users. The method comprises the following steps of: receiving optimal matrix indexes reported by at least two user terminals; performing multi-user MIMO pairing on the at least two user terminals according to the optimal matrix indexes; transmitting the optimal matrix indexes of the paired user terminals of the user terminals to the current user terminals; and sending the encoded data of the at least two user terminals out after superposition. The method, the device and the system provided by the embodiment of the invention are applied to all PMI-based MU-MIMO technology.

Description

Realize method, the Apparatus and system of multiuser MIMO under the CoMP scene
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of method, Apparatus and system of realizing multiuser MIMO (multiple-input and multiple-output) under CoMP (coordinating multi-point joint processes) scene.
Background technology
In the LTE that has applied at present MIMO (Multi-Input Multi-Output, multiple-input and multiple-output) technology (Long Term Evolution, Long Term Evolution) system, the antenna number of general base station side can be greater than the antenna number of end side.At CoMP (the Coordinate Multiple Processing introduced based on a plurality of base station collaborations, the processing of coordination multi-point joint) after technology, the base station side antenna number of simultaneously serving a user will be multiplied, now, number of transmit antennas will be far away more than the reception antenna number.
From the MIMO technical know-how, the limiting performance of MIMO is determined by the minimum value of number of transmit antennas and reception antenna number, the lifting that the number of transmit antennas increase at double therefore brought by CoMP can't bring the limiting performance of LTE system.
For solving above-mentioned number of transmit antennas and reception antenna number difference when excessive, there is a kind of enhancement mode MIMO technology in the MIMO unconspicuous problem that gains in prior art---MU-MIMO (Multi-UserMIMO, multiuser MIMO).For downlink transfer, by number of antennas, less a plurality of terminals form virtual reception antenna group in the MU-MIMO employing, to increase the number of reception antenna, promote the capacity gain that MIMO brings.Such as, for the Typical Disposition of 4 transmitting antennas, 2 reception antennas in the LTE system, the capacity of SU-MIMO (Single-User MIMO, Single User MIMO) is limited by 2 reception antennas; And MU-MIMO can multiplexing 2 users, receiving terminal just has 4 reception antennas (2 user, 2 reception antennas of each user), and now the capacity gain of MIMO will obviously promote.
Particularly, above-mentioned MU-MIMO technology can realize in the following way: base station is according to PMI (the Preferred Matrix Index of the terminal to report more than 2 or 2, preferred matrix index) and CQI (Channel Quality Indicator, channel quality indication) information is carried out user's pairing, and 2 or 2 above users' having matched information multiplexing is sent on identical time/frequency source block.
Yet, stating in realization in the process of MU-MIMO technology, the inventor finds that in prior art, at least there are the following problems:
MU-MIMO adopts stacked system multiplexing on identical running time-frequency resource a plurality of users' signal, and the data of different user exist each other and disturb; And in being handed down to the information of terminal, base station do not comprise any information (such as PMI) of the pairing user of described terminal, end side just can only be processed pairing user's data as interference signal like this, the pairing user who causes MU-MIMO user's existence to eliminate disturbs, and causes its error rate higher.
Summary of the invention
Embodiments of the invention provide method, the Apparatus and system of multiuser MIMO under a kind of CoMP of realization scene, and the pairing user that can suppress to exist between MU-MIMO user disturbs.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of method that realizes multiuser MIMO under the CoMP scene comprises:
Receive the preferred matrix index of at least two user terminal to send up;
According to described preferred matrix index, described at least two user terminals are carried out to the multiuser MIMO pairing;
Issue the preferred matrix index of the pairing user terminal of this user terminal to active user's terminal;
To after the data stack after described at least two user terminals coding, send.
A kind of method that realizes multiuser MIMO under the CoMP scene comprises:
Report the preferred matrix index of active user's terminal to base station;
Receive the preferred matrix index of the pairing user terminal of active user's terminal that described base station issues, described pairing user terminal is that described base station is chosen according to the preferred matrix index of active user's terminal to report;
Receive the superposed signal that described base station sends, and in conjunction with the preferred matrix index of active user's terminal and pairing user terminal thereof, described superposed signal is resolved.
A kind of for realizing the base station of multiuser MIMO under the CoMP scene, comprising:
Receiving element, for receiving the preferred matrix index of at least two user terminal to send up;
Pairing unit, for carrying out the multiuser MIMO pairing according to described preferred matrix index to described at least two user terminals;
The first transmitting element, for issuing the preferred matrix index of the pairing user terminal of this user terminal to active user's terminal;
The second transmitting element, for sending after the data stack by after described at least two user terminals coding.
A kind of for realizing the user terminal of multiuser MIMO under the CoMP scene, comprising:
Report unit, for report the preferred matrix index of active user's terminal to base station;
Receiving element, preferred matrix index for the pairing user terminal that receives active user's terminal that described base station issues, described pairing user is that described base station is chosen according to the preferred matrix index of active user's terminal to report, and receives the superposed signal that described base station sends;
Resolution unit, resolved described superposed signal for the preferred matrix index in conjunction with active user's terminal and pairing user terminal thereof.
A kind of system that realizes multiuser MIMO under the CoMP scene, comprise base station and at least two user terminals; Wherein,
Described user terminal, for reporting the preferred matrix index of active user's terminal to described base station;
Described base station, preferred matrix index at least two user terminal to send up according to receiving, described at least two user terminals are carried out to the multiuser MIMO pairing, then the preferred matrix index of the pairing user terminal of described user terminal is sent to described user terminal, and will send after the data stack after described at least two user terminals coding;
Described user terminal, also, for the preferred matrix index of the pairing user terminal of this user terminal in conjunction with received and the preferred matrix index of this user terminal, resolved the superposed signal received.
The method that realizes multiuser MIMO under the CoMP scene, Apparatus and system that the embodiment of the present invention provides, by the preferred matrix index of the pairing user terminal of this user terminal is provided to active user's terminal, make it get this information of all-key used while carrying out the front precoding of signal transmission, the superposed signal that active user's terminal just can be received according to described this information butt joint of all-key is like this resolved, thereby the pairing user who suppresses to exist between MU-MIMO user disturbs.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the method flow diagram in the embodiment of the present invention one;
The structural representation that Fig. 2 is the base station in the embodiment of the present invention one;
Fig. 3 is the method flow diagram in the embodiment of the present invention two;
The structural representation that Fig. 4 is the user terminal in the embodiment of the present invention two;
The signaling process figure that Fig. 5 is the method in the embodiment of the present invention three;
The structural representation that Fig. 6 is the base station in the embodiment of the present invention four;
The structural representation that Fig. 7 is the user terminal in the embodiment of the present invention five;
The structural representation that Fig. 8 is the system that realizes MU-MIMO in the embodiment of the present invention six.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
The method that realizes multiuser MIMO under the CoMP scene, the Apparatus and system that the embodiment of the present invention are provided below in conjunction with accompanying drawing are described in detail.
Embodiment mono-:
As shown in Figure 1, the method that realizes multiuser MIMO under the CoMP scene that the embodiment of the present invention provides comprises the following steps:
101, receive the preferred matrix index (PMI) that at least two user terminals (UE, User Equipment) report.
Base station receives at least two PMI that UE reports, and PMI is for the quantification of the channel space between the MIMO multichannel here.
102, according to described preferred matrix index, described at least two user terminals are carried out to the multiuser MIMO pairing.
The pairing here refers to select at least two users, make these users' data-reusing send on identical time/frequency source block, when a plurality of user terminals being carried out to the MU-MIMO pairing, multiple pairing algorithm can be arranged, and the MU-MIMO carried out such as parameters such as foundation maximize throughput, maximization signal to noise ratio, the pairings of PMI quadrature matches; The present embodiment adopts the algorithm of PMI quadrature pairing, and the embodiment of the present invention is not limited to this pairing algorithm certainly.
103, issue the PMI of the pairing user terminal of this user terminal to active user's terminal.
After issuing PMI, make described active user's terminal can get this information of all-key corresponding to this user terminal, all code book information while encoding.
For convenience, a user in described at least two user terminals is the active user;
104, will after the data stack after described at least two user terminals coding, send.
In embodiments of the present invention, the numbering of above steps also is not used in its execution sequence of restriction, such as step 103 and 104 can be carried out simultaneously.
In order to carry out better the method for multiuser MIMO under the above-mentioned CoMP of realization scene, it is a kind of for realizing the base station of multiuser MIMO under the CoMP scene that the embodiment of the present invention also provides, as shown in Figure 2, comprise receiving element 21, pairing unit 22, the first transmitting element 23 and the second transmitting element 24; Wherein,
Receiving element 21, for receiving the preferred matrix index of at least two user terminal to send up;
Pairing unit 22, for carrying out the multiuser MIMO pairing according to described preferred matrix index to described at least two user terminals;
The first transmitting element 23, for issuing the preferred matrix index of the pairing user terminal of this user terminal to active user's terminal;
The second transmitting element 24, for sending after the data stack by after described at least two user terminals coding.
The method that realizes multiuser MIMO under the CoMP scene and base station that the embodiment of the present invention provides, by the preferred matrix index of the pairing user terminal of this user terminal is provided to active user's terminal, make it get this information of all-key used while carrying out the front precoding of signal transmission, the superposed signal that active user's terminal just can be received according to described this information butt joint of all-key is like this resolved, thereby the pairing user who suppresses to exist between MU-MIMO user disturbs.
Embodiment bis-:
As shown in Figure 3, the method that realizes multiuser MIMO under the CoMP scene that the embodiment of the present invention provides comprises the following steps:
301, report the preferred matrix index (PMI) of active user's terminal (UE) to base station.
In the present embodiment, involved PMI adopts the Rank=1 pattern to carry out measuring under the condition of precoding at UE.
302, receive the preferred matrix index of the pairing user terminal of active user's terminal that described base station issues, described pairing user terminal is that described base station is chosen according to the preferred matrix index of active user's terminal to report.
303, receive the superposed signal that described base station sends, and in conjunction with the preferred matrix index of active user's terminal and pairing user terminal thereof, described superposed signal is resolved.
The parsing here can adopt the detection algorithm of existing receiver.
In embodiments of the present invention, the numbering of above steps also is not used in its execution sequence of restriction, and its concrete execution sequence can be determined as the case may be.
Now, the PMI of current UE and pairing UE thereof is combined, this information of all-key used while getting final product to such an extent that to base station, carry out signal precoding, then the superposed signal of receiving according to this information butt joint of all-key obtained is resolved, can get more accurately the signal that current UE need to receive, the pairing user who has simultaneously suppressed to exist between MU-MIMO user disturbs.
In order to carry out better the method for multiuser MIMO under the above-mentioned CoMP of realization scene, it is a kind of for realizing the user terminal of multiuser MIMO under the CoMP scene that the embodiment of the present invention also provides, as shown in Figure 4, comprise and report unit 41, receiving element 42 and resolution unit 43; Wherein,
Report unit 41, for report the preferred matrix index of active user's terminal to base station;
Receiving element 42, preferred matrix index for the pairing user terminal that receives active user's terminal that described base station issues, and receiving the superposed signal that described base station sends, wherein said pairing user is that described base station is chosen according to the preferred matrix index of active user's terminal to report;
Resolution unit 43, resolved described superposed signal for the preferred matrix index in conjunction with active user's terminal and pairing user terminal thereof.
The method that realizes multiuser MIMO under the CoMP scene and user terminal that the embodiment of the present invention provides, at first get the preferred matrix index of the pairing user terminal of this user terminal, and then in conjunction with the preferred matrix index of this user terminal self obtain carry out signal send before this information of all-key used during precoding, the superposed signal that active user's terminal just can be received according to described this information butt joint of all-key is like this resolved, thereby the pairing user who suppresses to exist between MU-MIMO user disturbs.
Embodiment tri-:
In the present embodiment, at first set and of the present inventionly realize that scene is: exist 2 communities to cooperate and form CoMP, and between the antenna in 2 antenna ，Er communities of configuration, the base station of each community and all uncorrelated between the antenna of minizone; Now, owing to being the CoMP that 2 communities form, so network side always to have 4 antennas (be N tx=4) combine emission.For user side, have 2 users at least in the CoMP district, and each user have 2 transmitting antennas at least.
After CoMP sets up, the user in CoMP district knows that this website is under the CoMP pattern, knows that this community and cooperation cell are combined to user terminal (UE) to send data.
Be paired into example according to PMI, a plurality of user terminals are carried out to MU-MIMO, and, in conjunction with shown in Fig. 5, the method that realizes multiuser MIMO under the CoMP scene that the embodiment of the present invention provides specifically comprises the following steps:
501, base station informs that by high-level signaling the UE feedback adopts the PMI based on subband of RANK=1 pattern.
PMI based on the subband information about channel entrained compared to the PMI based on full bandwidth commonly used is more accurate, can with channel, be complementary better.
502, the subband PMI that the high-level signaling indication that UE issues according to base station starts under the RANK=1 pattern measures.
The algorithm of determining PMI under the RANK=1 pattern is C = arg max { C i H H H * H * C i } ,
Wherein, C ifor the code book of the RANK=1 that provides in the LTE agreement, be a N tx* 1 column vector, the span of i is the integer in [0,15] here; H is channel information, by public guide frequency, can estimate to obtain, and is the matrix of 2 * 4 (reception antenna number * number of transmit antennas);
Particularly, by each C isequentially be updated to formula [C i hh h* H*C i] in, and find formula [C i hh h* H*C i] corresponding C while reaching maximum i, code book C now icorresponding numbering i, be the PMI of current UE.
503, UE is preserved the PMI measured, and the PMI obtained by PDSCH (Physical DownlinkShared Channel, Physical Downlink Shared Channel) reporting measurement.
UE is preserved the PMI measured, and can be to preserve at high level, also can preserve at bottom; And the content of preserving can be the PMI that direct preservation UE is measured, and can be also to preserve precoding vector corresponding to described PMI.
504, the PMI that base station reports according to a plurality of UE carries out the MU-MIMO pairing.
MU-MIMO pairing algorithm adopts the code book quadrature pairing that PMI is corresponding, judges that two users feed back whether quadrature of code book that the PMI that comes up is corresponding on corresponding subband; If quadrature this subband is joined to MU-MIMO can dispatch in resource collection; Afterwards, from dispatching resource collection, select N son band to carry out the MU-MIMO transmission;
In embodiments of the present invention, if the scope of choosing subband is not particularly limited, choosing of subband can be to extract several adjacent channels to process continuously so, can be also to extract randomly several non-adjacent channels to be processed.
505, described current UE is handed down to by the PMI information of the pairing UE of current UE in base station.
Because the PMI to current UE in step 503 preserves, therefore base station is without again being handed down to current UE the PMI that UE is corresponding, and now base station can be by issuing the PMI corresponding to pairing UE of described current UE originally for the signaling that issues PMI corresponding to current UE.
506,, after the base station data corresponding to each UE are carried out the precoding (Precoding) under the RANK=1 pattern, needs are sent to the signal of a plurality of UE to be superposeed and are mapped on specific running time-frequency resource send.
507, current UE according to the PMI of self correspondence with and PMI corresponding to pairing UE the superposed signal received is resolved.
Now, the PMI of current UE and pairing UE thereof is combined, this information of all-key used while getting final product to such an extent that to base station, carry out signal precoding, then the superposed signal of receiving according to this information butt joint of all-key obtained is carried out this detection of all-key, can estimate more accurately the signal that current UE need to receive, the pairing user who has simultaneously suppressed to exist between MU-MIMO user disturbs.
The numbering of above steps also is not used in its execution sequence of restriction, such as step 505 and 506 can be carried out simultaneously.
In embodiments of the present invention, step 503 can also realize in the following manner:
503 ', the PMI that obtains by PDSCH channel reporting measurement of UE.
Now, do not preserve the PMI of himself correspondence before the PMI obtained at reporting measurement due to UE, so subsequent step 505 should become:
505 ', base station by current UE and the pairing UE PMI information be handed down to described current UE.
The above-mentioned PMI information by current UE and pairing UE thereof is handed down to described current UE, in the process of specific implementation, can be first to send PMI information corresponding to current UE to current UE, then sends PMI information corresponding to its pairing UE to current UE;
Can be also, first send PMI information that the pairing UE of current UE is corresponding to current UE, then send PMI information corresponding to described current UE to this current UE;
Can also be that the PMI information of current UE and pairing UE thereof is handed down to described current UE in the lump.
But, step 505 ' in, because original base station was still occupied for the signaling that issues PMI corresponding to current UE, therefore need base station need to carry by a new signaling PMI corresponding to pairing UE of current UE; Now, in system, must increase new signaling consumption, so the scheme of step 503 and 505 correspondences is better than step 503 ' and 505 ' corresponding scheme, so the present invention can preferably adopt the former in implementation procedure.
In embodiments of the present invention, in the process of measuring and transmit PMI information, also can measure simultaneously and transmit the CQI information based on subband; Owing to including the modulation system that user terminal is corresponding in CQI information, while therefore in base station, carrying out the MU-MIMO pairing between a plurality of UE, can in conjunction with the modulation system in PMI information and CQI information, to a plurality of UE, be matched simultaneously, make the pairing between a plurality of UE more accurate, make its matching degree higher;
Afterwards, by the pairing UE of current UE, corresponding PMI information and modulation system sends to described current UE again in base station, will more be conducive to like this interference inhibition that UE is matched between the user after receiving superposed signal.
The method that realizes multiuser MIMO under the CoMP scene that the embodiment of the present invention provides, by the preferred matrix index of the pairing user terminal of this user terminal is provided to active user's terminal, make it get this information of all-key used while carrying out the front precoding of signal transmission, the superposed signal that active user's terminal just can be received according to described this information butt joint of all-key is like this carried out this detection of all-key, thereby the pairing user who suppresses to exist between MU-MIMO user disturbs.
Embodiment tetra-:
As shown in Figure 6, the embodiment of the present invention provide for realizing the base station of multiuser MIMO under the CoMP scene, comprise receiving element 61, pairing unit 62, the first transmitting element 63, the second transmitting element 64 and notification unit 65; Particularly,
Notification unit 65 PMIs of notice UE feedback based on subband; UE measures and reports its corresponding PMI after receiving this notice, and receiving element 61 receives the PMI that at least two UE report afterwards; Afterwards, pairing unit 62 is carried out the MU-MIMO pairing according to described PMI to described at least two UE; After pairing completes, the first transmitting element 63 issues the PMI of the pairing UE of this UE to current UE; The second transmitting element 64 sends after the data after described at least two UE stack are superposeed.
In addition, the first transmitting element 63 in the present embodiment, also for issuing the PMI that this UE is corresponding to current UE.
The embodiment of the present invention provide for realizing the base station of multiuser MIMO under the CoMP scene, can also comprise that the 3rd transmitting element 66, the three transmitting elements 66 are for issuing the modulation system of the pairing user terminal of this user terminal to active user's terminal; Perhaps, issue this user terminal and modulation system corresponding to pairing user terminal difference thereof to active user's terminal.
The embodiment of the present invention provide for realizing the base station of multiuser MIMO under the CoMP scene, by the preferred matrix index of the pairing user terminal of this user terminal is provided to active user's terminal, make it get this information of all-key used while carrying out the front precoding of signal transmission, the superposed signal that active user's terminal just can be received according to described this information butt joint of all-key is like this resolved, thereby the pairing user who suppresses to exist between MU-MIMO user disturbs.
Embodiment five:
As shown in Figure 7, what the embodiment of the present invention provided reports unit 71, receiving element 72 and resolution unit 73 for realizing the user terminal of multiuser MIMO under the CoMP scene, comprising, and measuring unit 74; Wherein,
Receiving element 72 receives the instruction of the PMI of requirement feedback based on subband that base station issues, then by measuring unit 74, according to this instruction, is carried out the measurement of PMI, and by reporting 71Xiang base station, unit to report the PMI of current UE; The PMI that described base station reports according to a plurality of UE carries out the MU-MIMO pairing to it, afterwards the information after pairing is sent to described a plurality of UE; Now, receiving element 72 receives the PMI of the pairing UE of the current UE that described base station issues, and described pairing UE is that the PMI that described base station reports according to current UE chooses, and the superposed signal that also sends for receiving described base station of receiving element 72; Afterwards, resolution unit 73 is resolved described superposed signal in conjunction with the PMI of current UE and pairing UE thereof.
For the PMI of UE current UE used when carrying out signal resolution, can obtain by following two kinds of modes:
One, the user terminal that the embodiment of the present invention provides, also comprise storage unit 75, this storage unit 75 is preserved for the preferred matrix index of active user's terminal that described measuring unit 74 is measured; The PMI of the described pairing UE that resolution unit 73 can be directly issues according to the PMI preserved in current UE and base station is resolved described superposed signal;
Its two, be handed down to current UE by described base station, receiving element 72 now is also for receiving the PMI of the current UE that described base station issues.
In addition, in embodiments of the present invention, in the process of measuring and transmit PMI information, also can measure simultaneously and transmit the modulation system that UE is corresponding; Therefore,
Described storage unit 75, also preserved for the modulation system corresponding to described current UE; Now, the described unit 71 that reports is also for reporting the modulation system of active user's terminal to base station;
Perhaps,
Described receiving element 72, also for receiving the described modulation system corresponding to current UE of going to the station to meet somebody and issuing.
The embodiment of the present invention provide for realizing the user terminal of multiuser MIMO under the CoMP scene, at first get the preferred matrix index of the pairing user terminal of this user terminal, and then in conjunction with the preferred matrix index of this user terminal self obtain carry out signal send before this information of all-key used during precoding, the superposed signal that active user's terminal just can be received according to described this information butt joint of all-key is like this resolved, thereby the pairing user who suppresses to exist between MU-MIMO user disturbs.
Embodiment six:
As shown in Figure 8, the system that realizes multiuser MIMO under the CoMP scene that the embodiment of the present invention provides, comprise base station 81 and at least two user terminals 82; Wherein,
Described user terminal 82, for reporting the preferred matrix index of active user's terminal to described base station 81;
Described base station 81, the preferred matrix index reported at least two user terminals 82 according to receiving, described at least two user terminals 82 are carried out to the multiuser MIMO pairing, then the preferred matrix index of the pairing user terminal of described user terminal 82 is sent to described user terminal 82, and will send after the data stack after described at least two user terminals coding;
Described user terminal 82, also, for the preferred matrix index of the pairing user terminal of this user terminal in conjunction with received and the preferred matrix index of this user terminal, resolved the superposed signal received.
In addition, described user terminal 82, the preferred matrix index that can also go out for preserving this user terminal measurement; Perhaps,
Described base station 81, can also send to this user terminal with the preferred matrix index of the pairing user terminal of this user terminal in the lump for the preferred matrix index of a certain user terminal by receiving.
In addition, in embodiments of the present invention, in the process of measuring and transmit PMI information, also can measure simultaneously and transmit the modulation system that UE is corresponding; Therefore,
Described user terminal 82, also for preserving the definite modulation system of this user terminal; Perhaps,
Described base station 81, also for by a certain user terminal and pairing user terminal thereof respectively corresponding modulation system send to described user terminal 82.
The system that realizes multiuser MIMO under the CoMP scene that the embodiment of the present invention provides, at first get the preferred matrix index of the pairing user terminal of this user terminal, and then in conjunction with the preferred matrix index of this user terminal self obtain carry out signal send before this information of all-key used during precoding, the superposed signal that active user's terminal just can be received according to described this information butt joint of all-key is like this resolved, thereby the pairing user who suppresses to exist between MU-MIMO user disturbs.
The method that realizes multiuser MIMO under the CoMP scene, Apparatus and system that the embodiment of the present invention provides, have a significant effect to the pairing user interference suppressed between MU-MIMO user; Especially for (being also low relevant between the transmitting antenna of a plurality of base stations in practical application) under low correlated channels, all-key MMSE (least mean-square error) detection originally can obtain great pairing user and disturb rejection, with desirable noiseless performance curve difference distance, reaches in 2dB.
The method that realizes multiuser MIMO under the CoMP scene, Apparatus and system that the embodiment of the present invention provides, be not only applicable to the MU-MIMO technology under CoMP, also applicable to the MU-MIMO technology under non-CoMP, so long as the MU-MIMO technology based on PMI all can be applied method, the Apparatus and system of realizing multiuser MIMO provided by the invention.
By the description of above execution mode, those skilled in the art can be well understood to the mode that the present invention can add essential hardware platform by software and realize, can certainly all by hardware, implement.Understanding based on such, what technical scheme of the present invention contributed to background technology can embody with the form of software product in whole or in part, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims (13)

1. a method that realizes multi-user's multiple-input, multiple-output MIMO under collaborative multi-point joint processing CoMP scene, is characterized in that, comprising:
Receive the preferred matrix index of at least two user terminal to send up;
According to described preferred matrix index, described at least two user terminals are carried out to the multiuser MIMO pairing;
Issue the preferred matrix index of the pairing user terminal of this user terminal to active user's terminal;
To after the data stack after described at least two user terminals coding, send;
Before the preferred matrix index of at least two user terminal to send up of described reception, described method also comprises:
The preferred matrix index of informing user terminal feedback based on subband; Describedly according to described preferred matrix index, described at least two user terminals are carried out to multiuser MIMO pairing and comprise:
Carry out user MIMO pairing according to described preferred matrix index information and the channel quality indicator CQI information based on subband based on subband of described at least two terminal to report; Wherein, described CQI information comprises the modulation system that described user terminal is corresponding;
The described preferred matrix index that issues the pairing user terminal of this user terminal to active user's terminal comprises:
Issue preferred matrix index and the modulation system corresponding to described pairing user terminal of the pairing user terminal of this user terminal to active user's terminal.
2. method according to claim 1, is characterized in that, before the preferred matrix index of the described pairing user terminal that issues this user terminal to active user's terminal, further comprises:
Issue to active user's terminal the preferred matrix index that this user terminal is corresponding.
3. method according to claim 1, is characterized in that, described after active user's terminal issues the preferred matrix index of pairing user terminal of this user terminal, further comprises:
Issue the modulation system of the pairing user terminal of this user terminal to active user's terminal; Perhaps,
Issue this user terminal and modulation system corresponding to pairing user terminal difference thereof to active user's terminal.
4. a method that realizes multiuser MIMO under the CoMP scene, is characterized in that, comprising:
Report the preferred matrix index of active user's terminal to base station;
Receive the preferred matrix index of the pairing user terminal of active user's terminal that described base station issues, described pairing user terminal is that described base station is chosen according to the preferred matrix index of active user's terminal to report;
Receive the superposed signal that described base station sends, and in conjunction with the preferred matrix index of active user's terminal and pairing user terminal thereof, described superposed signal is resolved;
Before the described preferred matrix index that reports active user's terminal to base station, described method also comprises:
The instruction of the preferred matrix index of requirement feedback based on subband that the reception base station issues, and carry out the measurement of preferred matrix index according to this instruction;
The described preferred matrix index of active user's terminal that reports to base station comprises: report the preferred matrix index of active user's terminal based on subband and the CQI information based on subband to base station; Wherein, described CQI information comprises the modulation system that described user terminal is corresponding;
The preferred matrix index of the pairing user terminal of active user's terminal that the described base station of described reception issues comprises: the preferred matrix index and the described pairing user terminal modulation system that receive the pairing user terminal of active user's terminal that described base station issues.
5. method according to claim 4, is characterized in that, before the described preferred matrix index that reports active user's terminal to base station, further comprises:
Preferred matrix index to active user's terminal of measuring is preserved; Perhaps,
Preferred matrix index and modulation system to active user's terminal of measuring are preserved; , the described preferred matrix index of active user's terminal that reports to base station is: the preferred matrix index from active user's terminal to base station and the modulation system that report.
6. according to the described method of claim 4 or 5, it is characterized in that, before the preferred matrix index of the pairing user terminal of active user's terminal that the described base station of described reception issues, further comprise:
Receive the preferred matrix index of active user's terminal that described base station issues; Perhaps,
Receive preferred matrix index and the modulation system of active user's terminal that described base station issues.
7. one kind for realizing the base station of multiuser MIMO under the CoMP scene, it is characterized in that, comprising:
Receiving element, for receiving the preferred matrix index of at least two user terminal to send up;
Pairing unit, for carrying out the multiuser MIMO pairing according to described preferred matrix index to described at least two user terminals;
The first transmitting element, for issuing the preferred matrix index of the pairing user terminal of this user terminal to active user's terminal;
The second transmitting element, for sending after the data stack by after described at least two user terminals coding;
Described base station also comprises: notification unit, for the preferred matrix index of informing user terminal feedback based on subband;
Described pairing unit specifically for, carry out user MIMO pairing according to described preferred matrix index information and the channel quality indicator CQI information based on subband based on subband of described at least two terminal to report; Wherein, described CQI information comprises the modulation system that described user terminal is corresponding;
Described the first transmitting element specifically for, issue the preferred matrix index of pairing user terminal of this user terminal and the modulation system of described pairing user terminal to active user's terminal.
8. base station according to claim 7, is characterized in that,
Described the first transmitting element, also for issuing the preferred matrix index of this user terminal to active user's terminal.
9. base station according to claim 7, is characterized in that, also comprises the 3rd transmitting element;
Described the 3rd transmitting element, for issuing the modulation system of the pairing user terminal of this user terminal to active user's terminal; Perhaps,
Described the 3rd transmitting element, for issuing this user terminal and modulation system corresponding to pairing user terminal difference thereof to active user's terminal.
10. one kind for realizing the user terminal of multiuser MIMO under the CoMP scene, it is characterized in that, comprising:
Report unit, for report the preferred matrix index of active user's terminal to base station;
Receiving element, preferred matrix index for the pairing user terminal that receives active user's terminal that described base station issues, and receiving the superposed signal that described base station sends, wherein said pairing user terminal is that described base station is chosen according to the preferred matrix index of active user's terminal to report;
Resolution unit, resolved described superposed signal for the preferred matrix index in conjunction with active user's terminal and pairing user terminal thereof;
Described user terminal also comprises measuring unit; Wherein,
Described receiving element, also for receiving the instruction of the preferred matrix index of requirement feedback based on subband that base station issues;
Described measuring unit, for carrying out the measurement of preferred matrix index according to described instruction;
Described report unit specifically for, report the preferred matrix index of active user's terminal based on subband and the CQI information based on subband to base station; Wherein, described CQI information comprises the modulation system that described user terminal is corresponding;
Described receiving element specifically for, receive the preferred matrix index of pairing user terminal of active user's terminal that described base station issues and the modulation system of described pairing user terminal.
11. user terminal according to claim 10, is characterized in that, also comprises storage unit;
Described storage unit, preserved for the preferred matrix index of active user's terminal that described measuring unit is measured; Perhaps,
Described storage unit, preserved for preferred matrix index and modulation system to described active user's terminal; , the described unit that reports is also for reporting the modulation system of active user's terminal to base station.
12. according to the described user terminal of claim 10 or 11, it is characterized in that,
Described receiving element, also for receiving the preferred matrix index of active user's terminal that described base station issues; Perhaps,
Described receiving element, also for receiving preferred matrix index and the modulation system of active user's terminal that described base station issues.
13. a system that realizes multiuser MIMO under the CoMP scene, is characterized in that, comprises base station and at least two user terminals; Wherein,
Described user terminal, for reporting the preferred matrix index of active user's terminal to described base station;
Described base station, preferred matrix index at least two user terminal to send up according to receiving, described at least two user terminals are carried out to the multiuser MIMO pairing, then the preferred matrix index of the pairing user terminal of described user terminal is sent to described user terminal, and will send after the data stack after described at least two user terminals coding;
Described user terminal, also, for the preferred matrix index of the pairing user terminal of this user terminal in conjunction with received and the preferred matrix index of this user terminal, resolved the superposed signal received;
Described base station is also for before the preferred matrix index at least two user terminal to send up of described reception, and informing user terminal feeds back the preferred matrix index based on subband;
Described user terminal also for, before to described base station, reporting the preferred matrix index of active user's terminal, receive the instruction of the preferred matrix index of requirement feedback based on subband that base station issues, and carry out the measurement of preferred matrix index according to this instruction;
Described user terminal specifically for, report the preferred matrix index of active user's terminal based on subband and the CQI information based on subband to base station; Wherein, described CQI information comprises the modulation system that described user terminal is corresponding;
Described base station specifically for, carry out user MIMO pairing according to described preferred matrix index information and the channel quality indicator CQI information based on subband based on subband of described at least two terminal to report;
Described user terminal specifically for, receive the preferred matrix index of pairing user terminal of active user's terminal that described base station issues and the modulation system of described pairing user terminal.
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