CN104270180B - User equipment matching method and device - Google Patents

User equipment matching method and device Download PDF

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Publication number
CN104270180B
CN104270180B CN201410478035.6A CN201410478035A CN104270180B CN 104270180 B CN104270180 B CN 104270180B CN 201410478035 A CN201410478035 A CN 201410478035A CN 104270180 B CN104270180 B CN 104270180B
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wave beam
user equipment
numbering
spacing
difference
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CN104270180A (en
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杨晶
张劲林
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Shanghai Huawei Technologies Co Ltd
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Shanghai Huawei Technologies Co Ltd
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Priority to CN201410478035.6A priority Critical patent/CN104270180B/en
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Priority to PCT/CN2015/083855 priority patent/WO2016041402A1/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

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

Abstract

The embodiment of the present application provides a kind of user equipment matching method and device, and applied in multiuser mimo system, methods described includes:Base station determines the corresponding wave beam of user equipment in the wave beam of formation;Judge whether the correlation spacing between the corresponding wave beam of any two user equipment is more than default spacing;When correlation spacing between the corresponding wave beam of any two user equipment is more than default spacing, determine any two user equipment as pairing user equipment;When correlation between the corresponding wave beam of any two user equipment is smaller than default spacing, determine any two user equipment without pairing.The embodiment of the present application effectively inhibits the interference between pairing user.

Description

User equipment matching method and device
Technical field
The application is related to wireless communication technology field, more particularly to a kind of user equipment matching method and dress Put.
Background technology
In a wireless communication system, MIMO (Multiple-Input Multiple-Output, multiple-input and multiple-output) leads to Often be divided into SU-MIMO (Single-User MIMO, single user multiple-input and multiple-output) and MU-MIMO (Mulit-User MIMO, Multi-user's multiple-input and multiple-output).SU-MIMO refers to the point-to-point antenna link of base station and unique user, and MU-MIMO is then many Individual user equipment uses identical running time-frequency resource and a base station communication, is adopted compared to SU-MIMO, MU-MIMO in user equipment In the case of with few antenna low cost, you can keep MIMO multiplexing advantage.It is to refer to energy in MU-MIMO to match user equipment Enough use the user equipment of identical running time-frequency resource.
When setting up MU-MIMO, network side needs to carry out multi-user installation pairing first, to determine which user equipment can To use identical running time-frequency resource, still, inventor has found under study for action, there is interference between pairing user equipment, if matched somebody with somebody To improper, it can more increase the interference between pairing user equipment, so as to influence MIMO spatial multiplexing gain, therefore, how accurately Realize that user equipment is matched, be very important for MU-MUMO.
The content of the invention
In view of this, this application provides a kind of user equipment matching method and device, to reduce in MU-MIMO, match somebody with somebody Influence to the interference between user to spatial multiplexing gain.
To achieve the above object, the application provides following technical scheme:
First aspect is there is provided a kind of user equipment matching method, applied in multiuser mimo system, institute The method of stating includes:
Base station determines the corresponding wave beam of user equipment in the wave beam of formation;
Judge whether the correlation spacing between the corresponding wave beam of any two user equipment is more than default spacing;
When correlation spacing between the corresponding wave beam of any two user equipment is more than default spacing, institute is determined Any two user equipment is stated as pairing user equipment;
When correlation between the corresponding wave beam of any two user equipment is smaller than default spacing, institute is determined Any two user equipment is stated without pairing.
In the first possible implementation of the first aspect, the base station determines user in the wave beam of formation The corresponding wave beam of equipment includes:
Obtain pre-coding matrix instruction and order instruction that user equipment is sent;
According to the pre-coding matrix instruction and the order instruction, the corresponding wave beam of the user equipment is determined.
With reference to the first possible implementation of the first aspect, second in the first aspect may realization side In formula, the base station includes 8 antennas;The pre-coding matrix instruction includes the first matrix and numbered and the second matrix coder, The product of first matrix and second matrix is pre-coding matrix;
It is described according to the pre-coding matrix instruction and the order instruction, determine the corresponding wave beam bag of the user equipment Include:
According to the order instruction, the data flow number of the user equipment transmitted in parallel is determined;According to first matrix Numbering and second matrix numbering, determine the corresponding wave beam of each data flow of the user equipment, and it is in institute State the wave beam numbering in the wave beam of base station formation.
With reference to the first aspect or any of the above-described kind of possible implementation of the first aspect, in the first aspect The third possible implementation in, different beams using wave beam numbering make a distinction, wave beam numbering value be 0,1,2 ..., Wave beam numbering difference represents the correlation spacing between wave beam, and the default spacing is preset by the following method:
For any two wave beam, it is determined that on a wave beam maximum antenna gain direction, the antenna gain between wave beam Difference is closest to pre-determined threshold, and on another wave beam maximum antenna gain direction, and the antenna gain difference between wave beam is not During less than the pre-determined threshold, the numbering difference between wave beam;
From the numbering difference of the multiple any two wave beams obtained, maximum numbering difference is selected as between described preset Away from;
Whether the correlation spacing judged between the corresponding wave beam of any two user equipment is more than default spacing bag Include:
Judge whether the wave beam numbering difference of any two user equipment correspondence wave beam is more than the default spacing.
With reference to second of the first aspect or the first aspect may implementation or the first aspect the Three kinds of possible implementations, in the 5th kind of possible implementation of the first aspect, different beams using wave beam number into Row is distinguished, and wave beam numbering value is 0,1,2 ..., and wave beam numbering difference represents the correlation spacing between wave beam;
Whether the correlation spacing judged between the corresponding wave beam of any two user equipment is more than default spacing bag Include:
Judge in the corresponding wave beam of any two user equipment, whether wave beam numbering difference is at least above one of wave beam Corresponding default spacing;
Wherein, the corresponding default spacing of the wave beam is preset by the following method:
For any one wave beam, it is determined that on its maximum antenna gain direction, with its antenna gain difference closest in advance Another wave beam of gating limit, and on another described wave beam maximum antenna gain direction, the antenna gain between wave beam is poor When value is not less than the pre-determined threshold, the numbering difference between wave beam, and it regard the numbering difference as the default of the wave beam Spacing.
With reference to the first aspect or any of the above-described kind of possible implementation of the first aspect, in the first aspect The 5th kind of possible implementation in, when the corresponding wave beam number of the determination user equipment includes multiple;
Whether the correlation spacing judged between the corresponding wave beam of any two user equipment is more than default spacing bag Include:
Judge that each corresponding wave beam of one of user equipment is set with another user in any two user equipment Whether the correlation spacing between each standby corresponding wave beam is all higher than default spacing.
Second aspect is there is provided a kind of user equipment contrast means, applied in multiuser mimo system Base station, described device includes:
Wave beam determining module, in the wave beam that is formed in base station, determining the corresponding wave beam of user equipment;
Judge module, for judging it is pre- whether the correlation spacing between the corresponding wave beam of any two user equipment is more than If spacing;
First pairing determining module, for determining the corresponding wave beam of any two user equipment in the judge module Between correlation spacing when being more than default spacing, determine any two user equipment as pairing user equipment;
Second pairing determining module, for determining the corresponding wave beam of any two user equipment in the judge module Between correlation when being smaller than default spacing, determine any two user equipment without pairing.
In the first possible implementation of the second aspect, the wave beam determining module includes:
Feedback information acquiring unit, pre-coding matrix instruction and order instruction for obtaining user equipment transmission;
Wave beam determining unit, for according to the pre-coding matrix instruction and the order instruction, determining that the user sets Standby corresponding wave beam.
With reference to the first possible implementation of the second aspect, second in the second aspect may realization side In formula, the base station includes 8 antennas;The pre-coding matrix instruction includes the first matrix and numbered and the second matrix coder, The product of first matrix and second matrix is pre-coding matrix;
The wave beam determining module includes:
Number determining unit, for according to the order instruction, determining the data flow number of the user equipment transmitted in parallel;
Numbering determining unit, for being numbered according to first matrix numbering and second matrix, determines the use The corresponding wave beam of each data flow of family equipment, and its wave beam numbering in the wave beam that the base station is formed.
With reference to the second aspect or any of the above-described kind of possible implementation of the second aspect, in the second aspect The third possible implementation in, different beams using wave beam numbering make a distinction, wave beam numbering value be 0,1,2 ..., Wave beam numbering difference represents the correlation spacing between wave beam, and described device also includes:
First default spacing setting module, for for any two wave beam, it is determined that in a wave beam maximum antenna gain On direction, the antenna gain difference between wave beam is closest to pre-determined threshold, and on another wave beam maximum antenna gain direction, When antenna gain difference between wave beam is not less than the pre-determined threshold, the numbering difference between wave beam;From multiple obtained In the numbering difference of two wave beams of anticipating, the maximum numbering difference of selection is used as the default spacing;
The judge module specifically for:
Judge whether the wave beam numbering difference of any two user equipment correspondence wave beam is more than the default spacing.
With reference to the second aspect or the second aspect the first possible implementation or the second aspect The third possible implementation of two kinds of possible implementations or the second aspect, in the 4th kind of possibility of the second aspect In implementation, different beams are made a distinction using wave beam numbering, and wave beam numbering value is 0,1,2 ..., wave beam numbering difference Represent the correlation spacing between wave beam;
The judge module specifically for:
Judge in the corresponding wave beam of any two user equipment, whether wave beam numbering difference is at least above one of wave beam Corresponding default spacing;
Described device also includes:
Second default spacing setting module, for for any one wave beam, it is determined that on its maximum antenna gain direction, With its antenna gain difference closest to pre-determined threshold another wave beam, and in another described wave beam maximum antenna gain direction On, when antenna gain difference between wave beam is not less than the pre-determined threshold, the numbering difference between wave beam, and by the numbering Difference as the wave beam default spacing.
With reference to the second aspect or any of the above-described kind of possible implementation of the second aspect, in the second aspect The 5th kind of possible implementation in, when the corresponding wave beam number of the determination user equipment includes multiple;
The judge module is specifically for judging that one of user equipment is corresponding each in any two user equipment Whether the correlation spacing between individual wave beam each wave beam corresponding with another user equipment is all higher than default spacing.
To sum up, in the embodiment of the present application, in the wave beam that base station is formed, it is first determined the corresponding wave beam of user equipment, lead to Cross whether the spacing compared between the corresponding wave beam of any two user equipment is more than default spacing, in any two user equipment Spacing between corresponding wave beam is more than default spacing, it may be determined that any two user equipment can be matched, in office Between the corresponding wave beam of two user equipmenies of meaning when being smaller than default spacing, determine any two user equipment without Pairing.By comparing the corresponding wave beam of any two user equipment, thus correlation is stronger, i.e., it is less than between wave beam default Any two user equipment of spacing is without pairing, it is to avoid it is bigger dry that the stronger user equipment pairing of correlation is brought Disturb, therefore can effectively suppress to match the interference between user, improve MU-MIMO gains.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this The embodiment of application, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis The accompanying drawing of offer obtains other accompanying drawings.
A kind of flow chart of user equipment matching method one embodiment that Fig. 1 provides for the embodiment of the present application;
A kind of flow chart for user equipment matching method another embodiment that Fig. 2 is provided for the embodiment of the present application.
A kind of structural representation of user equipment contrast means one embodiment that Fig. 3 provides for the embodiment of the present application;
A kind of structural representation for user equipment contrast means another embodiment that Fig. 4 is provided for the embodiment of the present application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out clear, complete Site preparation is described, it is clear that described embodiment is only some embodiments of the present application, rather than whole embodiments.It is based on Embodiment in the application, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of the application protection.
The technical method of the application, applied to utilization multi-user's multiple-input and multiple-output (MU-MIMO, Mulit-User Multiple-Input Multiple-Output) technology various wireless communication systems in, such as Long Term Evolution (LTE, Long Term Evolution) system etc..
User equipment (UE, User Equipment) can also be referred to as user terminal (UT, User Terminal), shifting Dynamic terminal (MT, Mobile Terminal), mobile station (MS, Mobile Station) etc..
Base station, can refer to the base station transceiver (BTS, Base Transceiver Station) in GSM or CDMA, Can also be the base station (being referred to as Node B) in WCDMA, can also be in LTE evolved base station (be referred to as eNB or e-NodeB, evolution NodeB).One or more cells (cell) may be supported/managed in one base station, and user equipment needs and network During communication, it will select a cell to initiate network insertion.
Pairing user refers to that the user equipment of identical running time-frequency resource can be used in MU-MIMO.User's pairing refers to use The pairing of family equipment.
In MU-MIMO technologies, prior art, in order to reduce the interference between pairing user, generally using close-to zero beam Criterion is shaped, by matching the channel quadrature between user, to suppress to match the interference between user.Shaped using close-to zero beam When calculating the wave beam weight of multi-user, it is necessary to which descending channel information is used as input during criterion.If the down channel letter obtained Breath is inaccurate, can not be completely orthogonal between pairing user, and MU-MIMO gain can be caused to decline.
In the embodiment of the present application, in the wave beam that base station is formed, it is first determined the corresponding wave beam of user equipment, by comparing Whether the spacing between the corresponding wave beam of any two user equipment is more than default spacing, corresponding in any two user equipment Spacing between wave beam is more than default spacing, it may be determined that any two user equipment can be matched, in any two Between the corresponding wave beam of user equipment when being smaller than default spacing, determine any two user equipment without pairing. By comparing the corresponding wave beam of any two user equipment, it may be determined that go out the spatial character and sky of any two user equipment Between position relationship be less than so that correlation is stronger, i.e., between wave beam any two user equipment of default spacing without Pairing, it is to avoid the bigger interference of correlation stronger user equipment pairing band, thus can effectively suppress to match user it Between interference, improve MU-MIMO gains.
Technical scheme is described in detail below in conjunction with the accompanying drawings.
A kind of flow chart of user equipment matching method one embodiment that Fig. 1 provides for the embodiment of the present application, is applied to In MU-MIMO communication systems, this method can include following steps:
101:Base station determines the corresponding wave beam of user equipment in the wave beam of formation.
102:Judge whether the correlation spacing between the corresponding wave beam of any two user equipment is more than default spacing.
103:When correlation spacing between the corresponding wave beam of any two user equipment is more than default spacing, really The fixed any two user equipment is used as pairing user equipment.
104:When correlation between the corresponding wave beam of any two user equipment is smaller than default spacing, really The fixed any two user equipment is not as pairing user equipment.
Wherein, can be true when the correlation spacing between the corresponding wave beam of any two user equipment is equal to default spacing The fixed any two user equipment is as pairing user equipment or determines any two user equipment without pairing.
Wave beam refers to the electromagnetic wave emitted by antenna the upper shape formed at the earth's surface.According to wave beam in space Sensing it is different, multiple wave beams can be made a distinction using wave beam numbering, and wave beam numbering value is 0,1,2 ..., for example with 3GPP (3rd Generation Partnership Project, the 3rd generation partner program) base station as defined in agreement includes 8 Exemplified by root antenna, in technical scheme, the wave beam number that 8 antennas can be formed after code book is weighted is 32, Wave beam numbering can be set to 0,1,2 ... 31.
In a kind of possible implementation, in order to improve matching efficiency, the corresponding ripple of any two user equipment is judged Whether correlation spacing between beam is more than default spacing can be by comparing the volume of the corresponding wave beam of any two user equipment Number difference is determined.
Different beams are made a distinction using wave beam numbering, and when wave beam numbering value is 0,1,2 ..., wave beam numbering difference can To represent the correlation spacing between wave beam, the default spacing is preset by the following method:
For any two wave beam, it is determined that in a wave beam maximum antenna gain (unit:DB, decibel) on direction, wave beam Between antenna gain difference closest to pre-determined threshold, and on another wave beam maximum antenna gain direction, between wave beam When antenna gain difference is not less than the pre-determined threshold, the numbering difference between wave beam;
From the numbering difference of the multiple any two wave beams obtained, maximum numbering difference is selected as between described preset Away from.
Due to different beams, its shape may be different, when the antenna gain between wave beam is equal to pre-determined threshold, obtain Numbering difference may be different.It is accurate in order to match, from the numbering difference for calculating obtained multiple any two wave beams, select number Spacing is preset in the maximum conduct of value.
In alternatively possible implementation, each wave beam can pre-set a default spacing.To arbitrary When two wave beams are judged, default spacing of the wave beam numbering difference at least above one of wave beam.Certainly, in order to enter One step improves accuracy, and it is corresponding default that wave beam numbering difference needs to be all higher than each wave beam in arbitrary two wave beams Spacing.
The corresponding default spacing of wave beam can be preset in the following manner:
For any one wave beam, it is determined that on its maximum antenna gain direction, with its antenna gain difference closest in advance Another wave beam of gating limit, and on another described wave beam maximum antenna gain direction, the antenna gain between wave beam is poor When value is not less than the pre-determined threshold, the numbering difference between wave beam, and it regard the numbering difference as the default of the wave beam Spacing.
, can also be true by comparing the antenna gain of wave beam when memory space is enough in another possible implementation It is fixed, that is, on the maximum antenna gain direction for judging the corresponding wave beam of each user equipment in any two user equipment, Whether the difference of the antenna gain of the corresponding wave beam of any two user equipment is more than pre-determined threshold.If it is, can be true Determine the correlation spacing between the corresponding wave beam of any two user equipment and be more than default spacing, if it is not, then can determine to appoint Correlation between the corresponding wave beam of two user equipmenies of meaning is smaller than default spacing.The antenna gain of wave beam can be true in advance Determine and store.
Certainly, because any two user equipment is in the maximum gain antenna direction of the corresponding wave beam of any one user equipment On, the antenna gain difference of the corresponding wave beam of any two user equipment is relatively.Therefore, in the not high field of accuracy requirement Under scape, the maximum antenna gain of the corresponding wave beam of any one user equipment in any two user equipment can also be only judged On direction, whether the difference of the antenna gain of the corresponding wave beam of any two user equipment is more than pre-determined threshold.
In the embodiment of the present application, base station is in its wave beam formed, it is first determined goes out the corresponding wave beam of user equipment, passes through The corresponding wave beam of user equipment is determined, spatial character and the locus of user equipment can be known, if user equipment pair The wave beam correlation answered is smaller than default spacing, shows that the correlation between user equipment is stronger, if as setting up MU- MIMO pairing user equipment, it will increase pairing user between interference, therefore the stronger user equipment of correlation not as User equipment is matched, and wave beam correlation spacing is more than default spacing, shows that the correlation between user equipment is relatively weak, then Pairing user equipment can be used as.By the spatial coherence according to user equipment, MU-MIMO user equipment pairing is realized, The interference between pairing user, especially in the system that can not accurately obtain channel information, such as FDD can be reduced (Frequency Division Duplexing, FDD) system, interference suppressioning effect is more obvious.
Wherein, base station determines the corresponding wave beam of user equipment, can determine user equipment pair according to the feedback of user equipment The wave beam answered, therefore referring to Fig. 2, a kind of stream of user equipment matching method another embodiment provided for the embodiment of the present application Cheng Tu, this method can include following steps:
201:Obtain pre-coding matrix instruction and order instruction that user equipment is sent.
202:According to the pre-coding matrix instruction and the order instruction, the corresponding wave beam of the user equipment is determined.
203:Judge whether the correlation spacing between the corresponding wave beam of any two user equipment is more than default spacing.
204:When correlation spacing between the corresponding wave beam of any two user equipment is more than default spacing, really The fixed any two user equipment is used as pairing user equipment.
205:When correlation between the corresponding wave beam of any two user equipment is smaller than default spacing, really The fixed any two user equipment is without pairing.
Precoding technique (Precoding) is a kind of utilization by channel information, is entered in transmitting terminal to sending data A kind of capable preconditioning technique, to adapt to corresponding channel circumstance, systematic function is improved with this.
Pre-coding matrix instruction (PMI, Precoding matrix Indication) and order instruction (RI, Rank Indication) sent by user equipment to base station, base station can determine pre-coding matrix by PMI, can be with by RI Order is determined, order illustrates the number of user equipment transmitted in parallel data flow.Base station is according to PMI and RI, it may be determined that go out use The data flow number of family equipment, and the corresponding wave beam of each data flow and its wave beam in the wave beam that base station is formed are compiled Number, the i.e. corresponding different beam position of different wave beam numberings.Wherein, because the corresponding wave beam of different data streams may be identical May be different.Therefore, according to the corresponding wave beam of each data flow, it may be determined that go out the corresponding wave beam of user equipment.
Because user equipment may correspond to multiple wave beams, therefore judge between the corresponding wave beam of any two user equipment It is specifically to judge that one of user equipment is corresponding in any two user equipment that whether correlation spacing, which is more than default spacing, Whether the correlation spacing between each wave beam each wave beam corresponding with another user equipment is all higher than default spacing.
It is of course also possible to not consider whether the corresponding wave beam of customer equipment data stream is identical, directly judges user equipment The corresponding wave beam of each data flow, therefore, when the corresponding wave beam number of user equipment is more than 1, the judgement any two It can be specifically to judge any two user that whether the correlation spacing between the corresponding wave beam of user equipment, which is more than default spacing, The corresponding wave beam of each data flow of one of user equipment and each data flow pair of another user equipment in equipment Whether the correlation spacing between the wave beam answered is more than default spacing.
Such as the first user equipment assumes correspondence wave beam 1 and wave beam 2, and second user equipment assumes correspondence wave beam 5 and wave beam 6, then need to be more than default spacing in the correlation spacing respectively between wave beam 5 and wave beam 6 of wave beam 1, and wave beam 2 respectively with ripple When correlation spacing between beam 5 and wave beam 6 is more than default spacing, the first user equipment and second user equipment just can conducts User equipment is matched, otherwise without pairing.Wherein, judge between the correlation between the corresponding wave beam of any two user equipment Away from whether being more than the specific implementation of default spacing and may refer to described in above-described embodiment, will not be repeated here.
In the present embodiment, base station is fed back according to user equipment PMI and RI, it may be determined that go out the wave beam in its formation In, the corresponding wave beam of user equipment, by whether comparing the correlation spacing between the corresponding wave beam of any two user equipment More than default spacing, when the correlation spacing between the corresponding wave beam of any two user equipment is more than default spacing, Determine any two user equipment as pairing user equipment;Between the corresponding wave beam of any two user equipment Correlation when being smaller than default spacing, determine any two user equipment without pairing.Can by the present embodiment Suppress to match the interference between user with effective.
Exemplified by including 8 antennas by base station in 3GPP agreements below, technical scheme is described in detail, it is necessary to What is illustrated is that the application is not limited to 8 antennas.8 antenna formation wave beams are narrower, easily make a distinction user equipment.
When base station includes 8 antennas, it usually needs 8 CSI-RS (Channel-State Information of configuration Reference signal, channel state information reference signals) port, PDSCH (Physical Downlink can be obtained Shared Channel, Physical Downlink Shared Channel) enhancing space feedback in transmission mode 9, this enhancing space feedback master To include four subarrays for base station, each subarray includes 2 cross polarised antennas, and each subarray is homogenous linear battle array Row.Weighting can embody spatial character between polarised direction identical subarray, contribute to MU-MIMO scheduling, can predict Cross polarization in multi-user interference, subarray brings enhancing diversity effect.According to these criterions, 8 CSI-RS ports The pre-coding matrix W of PMI feedbacks can be decomposed into the product of 2 matrixes, the first matrix W 1 and the second matrix W 2, W=W1* The weighting of W2, W1 correspondence uniform linear array, different W1 weights can form space and point to different wave beams.Therefore PMI bags The first matrix numbering and the second matrix numbering are included, the first matrix and the second matrix are found for indexing.
8 antennas that base station includes can form 32 wave beams, and numbering is respectively 0,1,2 ... 31.And then can draw The sensing schematic diagram of 32 wave beams, each wave beam is on being differently directed, the different antenna gain of correspondence.
The RI fed back according to user equipment, it may be determined that the value of order, and then the corresponding wave beam of user equipment can be determined When number, such as order are 1 or 2, user equipment correspondence wave beam number is 1, wherein, when order is 2, the two data streams pair of user equipment The wave beam answered is identical, is same wave beam, because the corresponding wave beam of the different data streams of user equipment may be identical, therefore not With order when, the corresponding wave beam number of user equipment may be identical, and when such as order is 3 or 4, the corresponding wave beam number of user equipment is equal For 2.
According to the first matrix numbering and the second matrix numbering, it can correspond to and find the first matrix and the second matrix, root User equipment can be determined in 32 wave beams according to the first matrix and the second matrix, and the corresponding space of each data flow refers to To different wave beams, the corresponding wave beam numbering of user equipment may thereby determine that out.
Wherein, the first matrix numbering, the second matrix numbering and wave beam numbering referring to table 1 mapping table, with reflecting as follows Penetrate relation:
Table 1
, can be fast by the first matrix numbering and the second matrix numbering of the mapping table of table 1, and user equipment feedback Speed determines the numbering of the corresponding wave beam of user equipment, and such as the first matrix numbering includes the 2, second matrix and numbered when including 4, can To determine the wave beam that the corresponding wave beam of user equipment is 17 as numbering.
After determining the corresponding wave beam of user equipment, by comparing the correlation spacing of any two user equipment, really Whether the fixed any two user equipment can match.When correlation spacing is more than default spacing, any two is determined User equipment is used as pairing user equipment;When correlation is smaller than default spacing, any two user equipment is determined Without pairing.
Wherein it is possible to represent correlation spacing using wave beam numbering difference, default spacing is preset by the following method:
For any two wave beam, it is determined that on a wave beam maximum antenna gain direction, the antenna gain between wave beam Difference is closest to pre-determined threshold, and on another wave beam maximum antenna gain direction, and the antenna gain difference between wave beam is not During less than the pre-determined threshold, the numbering difference between wave beam;
From the numbering difference of the multiple any two wave beams obtained, maximum numbering difference is selected as between described preset Away from.
Therefore, if the numbering difference between the corresponding wave beam of any two user equipment is more than the default spacing, appoint Two user equipmenies of meaning can be matched, if less than the default spacing, without pairing.
Assuming that default spacing is 10, if the wave beam numbering of the first user equipment correspondence wave beam is 5, wave beam numbering is corresponded to Second user equipment between 0~15 and 27~31 is stronger with the first user equipment correlation, it is impossible to be matched; Correspondence wave beam numbers the second user equipment between 16~26, can be matched with the first user equipment.
Certainly, each wave beam can also pre-set a default spacing.Judge to arbitrary two wave beams When, default spacing of the wave beam numbering difference at least above one of wave beam.In addition, in order to further improve accuracy, Wave beam numbering difference needs to be all higher than the corresponding default spacing of each wave beam in arbitrary two wave beams.Now wave beam pair The default spacing answered can then be preset in the following manner:
For any one wave beam, it is determined that on its maximum antenna gain direction, with its antenna gain difference closest in advance Another wave beam of gating limit, and on another described wave beam maximum antenna gain direction, the antenna gain between wave beam is poor When value is not less than the pre-determined threshold, the numbering difference between wave beam, and it regard the numbering difference as the default of the wave beam Spacing.
Alternatively, it is also possible to directly compare the corresponding wave beam of each user equipment in any two user equipment most On big antenna gain direction, whether the difference of the antenna gain of the corresponding wave beam of any two user equipment is more than pre- gating Limit, if it is not, then can determine that the correlation of any two user equipment is strong, without pairing, if it is, can determine to appoint The correlation of two user equipmenies of meaning is relatively weak, can be matched.
Wherein, when user equipment correspondence wave beam number includes multiple, then the corresponding ripple of any two user equipment is judged It is specifically to judge each corresponding wave beam of any two user equipment that whether the correlation spacing between beam, which is more than default spacing, Whether correlation spacing each other is all higher than default spacing, if it is, determine any two user equipment as with To user equipment;If not, determining any two user equipment without pairing.
For foregoing each method embodiment, in order to be briefly described, therefore it is all expressed as to a series of combination of actions, but It is that those skilled in the art should know, the application is not limited by described sequence of movement, because according to the application, certain A little steps can be carried out sequentially or simultaneously using other.Secondly, those skilled in the art should also know, be retouched in specification The embodiment stated belongs to preferred embodiment, necessary to involved action and module not necessarily the application.
A kind of structural representation of user equipment contrast means one embodiment that Fig. 3 provides for the embodiment of the present application, should Device is applied particularly in the base station in multiuser mimo system, and the device can include:
Wave beam determining module 301, in the wave beam that is formed in base station, determining the corresponding wave beam of user equipment.
Judge module 302, for judging whether the correlation spacing between the corresponding wave beam of any two user equipment is big In default spacing.
First pairing determining module 303, for determining that any two user equipment is corresponding in the judge module When correlation spacing between wave beam is more than default spacing, determine any two user equipment as pairing user equipment.
Second pairing determining module 304, for determining that any two user equipment is corresponding in the judge module When correlation between wave beam is smaller than default spacing, determine any two user equipment without pairing.
When correlation spacing between the corresponding wave beam of any two user equipment is equal to default spacing, it may be determined that described Any two user equipment is as pairing user equipment or determines any two user equipment without pairing.
Wherein, as a kind of possible implementation, different beams are made a distinction using wave beam numbering, wave beam numbering value For 0,1,2 ..., wave beam numbering difference represents the correlation spacing between wave beam, and the judge module 302 can be specifically for:
Judge whether the wave beam numbering difference of any two user equipment correspondence wave beam is more than the default spacing.
Now, the device can also include:
First default spacing setting module, for for any two wave beam, it is determined that in a wave beam maximum antenna gain On direction, the antenna gain difference between wave beam is closest to pre-determined threshold, and on another wave beam maximum antenna gain direction, When antenna gain difference between wave beam is not less than the pre-determined threshold, the numbering difference between wave beam;From multiple obtained In the numbering difference of two wave beams of anticipating, the maximum numbering difference of selection is used as the default spacing.
As another possible implementation, the judge module specifically for:
Judge in the corresponding wave beam of any two user equipment, whether wave beam numbering difference is at least above one of wave beam Corresponding default spacing;
Now, the device can also include:
Second default spacing setting module, for for any one wave beam, it is determined that on its maximum antenna gain direction, With its antenna gain difference closest to pre-determined threshold another wave beam, and in another described wave beam maximum antenna gain direction On, when antenna gain difference between wave beam is not less than the pre-determined threshold, the numbering difference between wave beam, and by the numbering Difference as the wave beam default spacing.
Certainly, in another possible implementation, when memory space is enough, it can also be increased by comparing the antenna of wave beam Benefit determine, now judge module 302 specifically for:
Judge on the corresponding wave beam maximum antenna gain direction of each user equipment in any two user equipment, Whether the antenna gain difference of any two user equipment correspondence wave beam is more than pre-determined threshold, if it is, determining described appoint Correlation spacing between the corresponding wave beam of two user equipmenies of meaning is more than the default spacing, if not, determining described any Correlation between the corresponding wave beam of two user equipmenies is smaller than the default spacing.
Certainly, because any two user equipment is in the maximum gain antenna direction of the corresponding wave beam of any one user equipment On, the antenna gain difference of the corresponding wave beam of any two user equipment is relatively.Therefore, in the not high field of accuracy requirement Under scape, judge module can also only judge the maximum of the corresponding wave beam of any one user equipment in any two user equipment On antenna gain direction, whether the antenna gain difference of the corresponding wave beam of any two user equipment is more than pre-determined threshold.
Wherein, because the corresponding wave beam of multiple data flows of a user equipment may be identical or different, therefore a use Family equipment may correspond to multiple wave beams, therefore judge module can be specifically for judging the corresponding wave beam of any two user equipment Between correlation spacing whether to be more than default spacing be specifically to judge one of user equipment in any two user equipment It is pre- whether the correlation spacing between corresponding each wave beam each wave beam corresponding with another user equipment is all higher than If spacing.
In the embodiment of the present application, base station is in its wave beam formed, it is first determined goes out the corresponding wave beam of user equipment, passes through The corresponding wave beam of user equipment is determined, spatial character and the locus of user equipment can be known, if user equipment pair The wave beam correlation answered is smaller than default spacing, shows that the correlation between user equipment is stronger, if as setting up MU- MIMO pairing user equipment, it will increase pairing user between interference, therefore the stronger user equipment of correlation not as User equipment is matched, and wave beam correlation spacing is more than default spacing, shows that the correlation between user equipment is relatively weak, then Pairing user equipment can be used as.By the spatial coherence according to user equipment, MU-MIMO user equipment pairing is realized, The interference between pairing user, especially in the system that can not accurately obtain channel information, such as FDD can be reduced (Frequency Division Duplexing, FDD) system, interference suppressioning effect is more obvious.
Wherein, base station determines the corresponding wave beam of user equipment, can determine user equipment pair according to the feedback of user equipment The wave beam answered, therefore referring to Fig. 4, a kind of knot of user equipment contrast means another embodiment provided for the embodiment of the present application Structure schematic diagram, the device can include wave beam determining module 301, the pairing determining module 303 of judge module 302, first and the Two pairing determining modules 304, modules function may refer to embodiment illustrated in fig. 3, exist with embodiment illustrated in fig. 3 difference In in the present embodiment, the wave beam determining module 301 can include:
Feedback information acquiring unit 401, pre-coding matrix instruction and order instruction for obtaining user equipment transmission;
Wave beam determining unit 402, for according to the pre-coding matrix instruction and the order instruction, determining the user The corresponding wave beam of equipment.
Precoding technique (Precoding) is a kind of utilization by channel information, is entered in transmitting terminal to sending data A kind of capable preconditioning technique, to adapt to corresponding channel circumstance, systematic function is improved with this.
Pre-coding matrix instruction (PMI, Precoding matrix Indication) and order instruction (RI, Rank Indication) sent by user equipment to base station, base station can determine pre-coding matrix by PMI, can be with by RI Order is determined, order illustrates the number of user equipment transmitted in parallel data flow.Base station is according to PMI and RI, it may be determined that go out use The data flow number of family equipment, and the corresponding wave beam of each data flow and its wave beam in the wave beam that base station is formed are compiled Number, the i.e. corresponding different beam position of different wave beam numberings.Wherein, because the corresponding wave beam of different data streams may be identical May be different.Therefore, according to the corresponding wave beam of each data flow, it may be determined that go out the corresponding wave beam of user equipment.
In a practical application, when base station includes 8 antennas;The pre-coding matrix instruction is numbered including the first matrix And second matrix coder, the product of first matrix and second matrix is pre-coding matrix, described under the scene Wave beam determining module can include:
Number determining unit, for according to the order instruction, determining the data flow number of the user equipment transmitted in parallel;
Numbering determining unit, for being numbered according to first matrix numbering and second matrix, determines the use The corresponding wave beam of each data flow of family equipment, and its wave beam numbering in the wave beam that the base station is formed.
Wherein, wave beam numbering can be determined according to above-mentioned table 1.
Wherein, comparing correlation spacing can be by comparing each user equipment pair in any two user equipment On the maximum antenna gain direction for the wave beam answered, the difference of the antenna gain of the corresponding wave beam of any two user equipment is true It is fixed, due to having confirmed that wave beam is numbered, compare the corresponding wave beam of any two user equipment antenna gain can by than Number and determine compared with wave beam.
Assuming that the preset difference value of the wave beam numbering set is 10, if the wave beam numbering of the first user equipment correspondence wave beam is 5, then correspond to wave beam and number second user equipment between 0~15 and 27~31, with the first user equipment correlation compared with By force, it is impossible to matched;Correspondence wave beam numbers the second user equipment between 16~26, can be carried out with the first user equipment Pairing.In the hypothesis, it is believed that the corresponding antenna gain difference 10dB of wave beam of wave beam numbering difference 10.
Because user equipment may correspond to multiple wave beams, therefore judge module can be specifically to judge that any two user sets Phase in standby between each corresponding wave beam of one of user equipment each wave beam corresponding with another user equipment Whether closing property spacing is all higher than default spacing.
In the present embodiment, base station is fed back according to user equipment PMI and RI, it may be determined that go out the wave beam in its formation In, the corresponding wave beam of user equipment, by whether comparing the correlation spacing between the corresponding wave beam of any two user equipment More than default spacing, when the correlation spacing between the corresponding wave beam of any two user equipment is more than default spacing, Determine any two user equipment as pairing user equipment;Between the corresponding wave beam of any two user equipment Correlation when being smaller than default spacing, determine any two user equipment without pairing.Can by the present embodiment Suppress to match the interference between user with effective.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other Between the difference of embodiment, each embodiment identical similar portion mutually referring to.For device disclosed in embodiment For, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is said referring to method part It is bright.
Finally, in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation Between there is any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant meaning Covering including for nonexcludability, so that process, method, article or equipment including a series of key elements not only include that A little key elements, but also other key elements including being not expressly set out, or also include be this process, method, article or The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged Except also there is other identical element in the process including the key element, method, article or equipment.
For convenience of description, it is divided into various units during description apparatus above with function to describe respectively.Certainly, this is being implemented The function of each unit can be realized in same or multiple softwares and/or hardware during application.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can Realized by the mode of software plus required common hardware.Based on it is such understand, the technical scheme of the application substantially or Person says that the part contributed to prior art can be embodied in the form of software product, and the computer software product can be with It is stored in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are make it that a computer equipment (can To be personal computer, server, or network equipment etc.) perform some parts of each embodiment of the application or embodiment Described method.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the application. A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein General Principle can in other embodiments be realized in the case where not departing from the application protection domain.Therefore, the application will not It can be intended to be limited to the embodiments shown herein, and be to fit to consistent with principles disclosed herein and features of novelty Most wide scope.

Claims (8)

1. a kind of user equipment matching method, it is characterised in that applied in multiuser mimo system, methods described Including:
Base station determines the corresponding wave beam of user equipment in the wave beam of formation;
Judge whether the correlation spacing between the corresponding wave beam of any two user equipment is more than default spacing;
When correlation spacing between the corresponding wave beam of any two user equipment is more than default spacing, it is determined that described Two user equipmenies anticipate as pairing user equipment;
When correlation between the corresponding wave beam of any two user equipment is smaller than default spacing, it is determined that described Two user equipmenies anticipate without pairing;
Wherein, different beams are made a distinction using wave beam numbering, and wave beam numbering value is 0,1,2 ..., wave beam numbering difference table Correlation spacing between oscillography beam;
The default spacing is preset by the following method:
For any two wave beam, it is determined that on a wave beam maximum antenna gain direction, the antenna gain difference between wave beam Closest to pre-determined threshold, and on another wave beam maximum antenna gain direction, the antenna gain difference between wave beam is not less than During the pre-determined threshold, the numbering difference between wave beam;
From the numbering difference of the multiple any two wave beams obtained, the maximum numbering difference of selection is used as the default spacing;
Whether the correlation spacing judged between the corresponding wave beam of any two user equipment, which is more than default spacing, includes:
Judge whether the wave beam numbering difference of any two user equipment correspondence wave beam is more than the default spacing;
Or, the corresponding default spacing of the wave beam is preset by the following method:
For any one wave beam, it is determined that on its maximum antenna gain direction, with its antenna gain difference closest to pre- gating Another wave beam of limit, and on another described wave beam maximum antenna gain direction, the antenna gain difference between wave beam is not During less than the pre-determined threshold, the numbering difference between wave beam, and using the numbering difference as the wave beam default spacing;
Whether the correlation spacing judged between the corresponding wave beam of any two user equipment, which is more than default spacing, includes:
Judge in the corresponding wave beam of any two user equipment, whether wave beam numbering difference is at least above one of wave beam correspondence Default spacing.
2. according to the method described in claim 1, it is characterised in that the base station determines user equipment in the wave beam of formation Corresponding wave beam includes:
Obtain pre-coding matrix instruction and order instruction that user equipment is sent;
According to the pre-coding matrix instruction and the order instruction, the corresponding wave beam of the user equipment is determined.
3. method according to claim 2, it is characterised in that the base station includes 8 antennas;The pre-coding matrix refers to Show and numbered including the first matrix numbering and the second matrix, the product of first matrix and second matrix is precoding square Battle array;
It is described according to the pre-coding matrix instruction and the order instruction, determine that the corresponding wave beam of the user equipment includes:
According to the order instruction, the data flow number of the user equipment transmitted in parallel is determined;Numbered according to first matrix And the second matrix numbering, the corresponding wave beam of each data flow of the user equipment is determined, and it is in the base Stand formed wave beam in wave beam numbering.
4. the method according to any one of claims 1 to 3, it is characterised in that the corresponding wave beam of the determination user equipment When number includes multiple;
Whether the correlation spacing judged between the corresponding wave beam of any two user equipment, which is more than default spacing, includes:
Judge each corresponding wave beam of one of user equipment and another user equipment pair in any two user equipment Whether the correlation spacing between each wave beam answered is all higher than default spacing.
5. a kind of user equipment contrast means, it is characterised in that applied to the base station in multiuser mimo system, institute Stating device includes:
Wave beam determining module, in the wave beam that is formed in base station, determining the corresponding wave beam of user equipment;
Judge module, between judging the correlation spacing between the corresponding wave beam of any two user equipment whether more than presetting Away from;
First pairing determining module, between determining the corresponding wave beam of any two user equipment in the judge module Correlation spacing when being more than default spacing, determine any two user equipment as pairing user equipment;
Second pairing determining module, between determining the corresponding wave beam of any two user equipment in the judge module Correlation when being smaller than default spacing, determine any two user equipment without pairing;
Wherein, different beams are made a distinction using wave beam numbering, and wave beam numbering value is 0,1,2 ..., wave beam numbering difference table Correlation spacing between oscillography beam;
Described device also includes:
First default spacing setting module, for for any two wave beam, it is determined that in a wave beam maximum antenna gain direction On, the antenna gain difference between wave beam is closest to pre-determined threshold, and on another wave beam maximum antenna gain direction, wave beam Between antenna gain difference when being not less than the pre-determined threshold, the numbering difference between wave beam;From multiple any two obtained In the numbering difference of individual wave beam, the maximum numbering difference of selection is used as the default spacing;
Accordingly, the judge module specifically for:
Judge whether the wave beam numbering difference of any two user equipment correspondence wave beam is more than the default spacing;
Or, described device also includes:
Second default spacing setting module, for for any one wave beam, it is determined that on its maximum antenna gain direction, with it Antenna gain difference closest to pre-determined threshold another wave beam, and on another described wave beam maximum antenna gain direction, When antenna gain difference between wave beam is not less than the pre-determined threshold, the numbering difference between wave beam, and by the number difference It is worth the default spacing as the wave beam;
Accordingly, the judge module specifically for:
Judge in the corresponding wave beam of any two user equipment, whether wave beam numbering difference is at least above one of wave beam correspondence Default spacing.
6. device according to claim 5, it is characterised in that the wave beam determining module includes:
Feedback information acquiring unit, pre-coding matrix instruction and order instruction for obtaining user equipment transmission;
Wave beam determining unit, for according to the pre-coding matrix instruction and the order instruction, determining the user equipment pair The wave beam answered.
7. device according to claim 6, it is characterised in that the base station includes 8 antennas;The pre-coding matrix refers to Show and numbered including the first matrix numbering and the second matrix, the product of first matrix and second matrix is precoding square Battle array;
The wave beam determining module includes:
Number determining unit, for according to the order instruction, determining the data flow number of the user equipment transmitted in parallel;
Numbering determining unit, for being numbered according to first matrix numbering and second matrix, determines that the user sets The standby corresponding wave beam of each data flow, and its wave beam numbering in the wave beam that the base station is formed.
8. the device according to any one of claim 5~7, it is characterised in that the corresponding wave beam of the determination user equipment When number includes multiple;
The judge module is specifically for judging each corresponding ripple of one of user equipment in any two user equipment Whether the correlation spacing between beam each wave beam corresponding with another user equipment is all higher than default spacing.
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