CN102832980B - A kind of Uplink MIMO pattern method for switching between, device and equipment - Google Patents
A kind of Uplink MIMO pattern method for switching between, device and equipment Download PDFInfo
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- CN102832980B CN102832980B CN201110159288.3A CN201110159288A CN102832980B CN 102832980 B CN102832980 B CN 102832980B CN 201110159288 A CN201110159288 A CN 201110159288A CN 102832980 B CN102832980 B CN 102832980B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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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
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
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Abstract
The invention discloses a kind of Uplink MIMO pattern method for switching between, device and equipment, this method base station is when getting radiation pattern that current transmission system uses for MIMO method, the space correlation property coefficient of two stream of Uplink MIMO is determined, and the received signal strength indicator under non-MIMO mode and the Packet Error Ratio each flowed are each flowed in acquisition；The smaller value of the received signal strength indicator of two stream of selection, and Packet Error Ratio higher value, according to the space correlation property coefficients of two stream, the received signal strength indicator and Packet Error Ratio of selection, it is determined that corresponding Uplink MIMO switch mode.Due to being compared in the present invention by the space correlation property coefficient to two stream, the smaller value of received signal strength indicator of selection and the higher value of Packet Error Ratio and respective threshold, it is determined that corresponding Uplink MIMO switch mode, it is achieved thereby that the pattern switching of Uplink MIMO, therefore, more preferable transmission performance is obtained.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of up multiple-input and multiple-output (Multiple-
Input Multiple-Out-put, MIMO) pattern method for switching between, device and equipment.
Background technology
MIMO technology be OFDM (Orthogonal Frequency Division Multiple Access,
OFDMA) in technology physical layer key technology.MIMO technology refers in a wireless communication system, signal is spatially encoded
Launched afterwards by many antennas, reached by wireless channel after receiving terminal, received by many antennas positioned at receiving terminal,
Wireless space decoding is recycled to recover the technology of original signal.
MIMO technology application includes a variety of implementations, by taking WiMax systems as an example, the realization side in a wireless communication system
Formula includes：A variety of multi-antenna technologies such as transmitting diversity mode, spatial multiplexing mode and beam shaping mode.For receiving terminal master
If multiple antennas receives diversity, the antenna number and ability of terminal are limited to.Uplink MIMO mainly studies transmitting diversity mode and sky
Between multiplex mode.Various multiple antennas implementations are directed to different wireless channel environments, such as MIMO in wireless channel
When the spatial coherence of two streams is relatively low, system results in the preferable availability of frequency spectrum using spatial multiplexing mode, protects simultaneously
Demonstrate,prove transmission performance；When the spatial coherence of two streams of MIMO is higher, system is resulted in preferably using transmitting diversity mode
Transmission performance.Therefore communication system can be carried out adaptively according to the condition of present channel between different multi-antenna technologies
Switching.
Have much for the handover scheme of descending mimo system, but be limited to the ability of terminal, and for up
The switching of mimo system, also without fairly perfect scheme.
The content of the invention
In view of this, the invention provides a kind of Uplink MIMO pattern method for switching between, device and equipment, there is provided for upper
The switching method of row mimo system, obtains more preferable transmission performance.
The invention provides a kind of up multiple-input and multiple-output MIMO mode method for switching between, this method includes following step
Suddenly：
Base station is when getting radiation pattern that current transmission system uses for MIMO method, and docking, which is collected mail, number carries out a channel
Estimation, determines the space correlation property coefficient of two stream of Uplink MIMO；
Estimation currently each flows the received signal strength indicator under non-MIMO mode；
The quantity of each stream current erroneous packet obtained according to verification, and it is each according to what is obtained in upper layer message
Current data packet quantity is flowed, it is determined that the Packet Error Ratio each flowed；
Selection two stream received signal strength indicator smaller value, and Packet Error Ratio higher value, according to two stream skies
Between relative coefficient, the received signal strength indicator and Packet Error Ratio of selection, it is determined that corresponding Uplink MIMO switch mode.
The invention provides switching device between a kind of up multiple-input and multiple-output MIMO mode, described device includes：
First determining module, for when getting radiation pattern that current transmission system uses for MIMO method, docking
The collection of letters number carries out a channel estimation, determines the space correlation property coefficient of two stream of Uplink MIMO；
Estimation module, for estimating currently each to flow the received signal strength indicator under non-MIMO mode；
Second determining module, for the quantity according to the current wrong data bag of the obtained each stream of verification, and according to
The current data packet number of each stream for being obtained in upper layer message, it is determined that the Packet Error Ratio each flowed；
Compare determining module, the smaller value of the received signal strength indicator for selecting two stream, and Packet Error Ratio are larger
Value, according to the space correlation property coefficient of two stream, the received signal strength indicator and Packet Error Ratio of selection, it is determined that corresponding up
MIMO switch modes.
The invention provides a kind of base station, the base station includes said apparatus.
The invention provides a kind of Uplink MIMO pattern method for switching between, device and equipment, in the method, base station, which is worked as, to be obtained
When getting radiation pattern that current transmission system uses for MIMO method, docking, which is collected mail, number carries out a channel estimation, determines up
The space correlation property coefficient of two streams of MIMO；And obtain and each flow received signal strength indicator under non-MIMO mode and often
The Packet Error Ratio of individual stream；Selection two stream received signal strength indicator smaller value, and Packet Error Ratio higher value, according to two stream
Space correlation property coefficient, the received signal strength indicator and Packet Error Ratio of selection, it is determined that corresponding Uplink MIMO switch mode.
Due in the present invention by two stream space correlation property coefficients, selection received signal strength indicator smaller value and
The higher value of Packet Error Ratio is compared with the respective threshold set, it is determined that corresponding Uplink MIMO switch mode, it is achieved thereby that
The pattern switching of Uplink MIMO, therefore, obtains more preferable transmission performance.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
The process schematic switched between a kind of up multiple-input and multiple-output MIMO mode that Fig. 1 provides for the present invention；
Fig. 2A uses the operating diagram of upstream cooperation MIMO pattern for two terminals of single antenna；
Fig. 2 B are the operating diagram for terminal uplink MIMO A, MIMO B-modes for possessing double antenna；
Fig. 3 for the present invention provide when selection the Packet Error Ratio be less than setting Packet Error Ratio threshold value when, Uplink MIMO mould
The handoff procedure of formula；
Fig. 4 is more than a kind of up multiple-input and multiple-output MIMO of the Packet Error Ratio threshold value of setting for the Packet Error Ratio that the present invention is provided
The detailed process schematic diagram switched between pattern；
The structural representation of switching device between a kind of up multiple-input and multiple-output MIMO mode that Fig. 5 provides for the present invention.
Embodiment
In order that technical problems, technical solutions and advantages to be solved are clearer, clear, tie below
Drawings and examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
The process schematic switched between a kind of up multiple-input and multiple-output MIMO mode that Fig. 1 provides for the present invention, this is cut
The process of changing comprises the following steps：
S101：Base station is when getting radiation pattern that current transmission system uses for MIMO method, and docking, which is collected mail, number enters
Row channel estimation, determines the space correlation property coefficient of two stream of Uplink MIMO.
Wherein, base station gets the radiation pattern of current transmission system use, is by directly reading Mac To Phy
What message was obtained.
S102：Base station estimation currently each flows the received signal strength indicator under non-MIMO mode.
S103：The quantity for each stream current erroneous packet that base station is obtained according to verification, and according in upper layer message
The each stream current data packet quantity obtained, it is determined that the Packet Error Ratio each flowed.
S104：Selection two stream received signal strength indicator smaller value, and Packet Error Ratio higher value, according to two stream
Space correlation property coefficient, the received signal strength indicator and Packet Error Ratio of selection, it is determined that corresponding Uplink MIMO switch mode.
After base station determines corresponding Uplink MIMO switch mode, the base station is by the Uplink MIMO after the switching of determination
Pattern notification is to terminal.
The up multiple-input and multiple-output MIMO mode method for switching between that the present invention is provided, is primarily directed to Uplink MIMO two
Switch between the MIMO mode of individual stream, specific this method is applied in unit/terminal double antenna, and two terminals of single antenna are used
During MIMO mode, the handoff procedure of its MIMO mode.
Fig. 2A uses the operating diagram of upstream cooperation MIMO pattern for two terminals of single antenna, and Fig. 2 B are to possess double days
The operating diagram of terminal uplink MIMO A, MIMO B-modes of line.The end of single antenna is respectively adopted based on two users of Fig. 2A
End, after the data of two users are encoded, user data is sent to base station by two terminals by uplink coordinated pattern.Base
Use the terminal of double antenna in Fig. 2 party B-subscriber, after terminal is encoded user data, data after obtained coding by when
Sky coding, base station is transmitted data to by MIMO A or MIMO B modules.
The multi-antenna transmission technology that current Wimax system uplinks are used mainly has following several：1, spatial reuse：Terminal is adopted
BLAST structures are used, space-time coding matrices areLaunch unlike signal simultaneously using transmitting antenna, obtain downlink traffic and add
Times, 2 Uplink MIMO B and collaboration MIMO.3, space-time emission diversity：Terminal uses Alamouti-STC (Space Time
Coding) scheme, space-time coding matrices areLaunch the signal repeated using antenna, obtain diversity gain.In addition,
Collaboration MIMO can also be used in combination with Uplink MIMO A or MIMO B.The scene of different multi-antenna technology applications is not
Together, the adaptive switching of multi-antenna technology is realized, it is possible to increase the performance of system.
The space correlation property coefficient according to two stream of Uplink MIMO is needed in the present invention, determines the switching of MIMO mode
Journey, specifically it is determined that the stream of Uplink MIMO two space correlation property coefficient when include：
The docking collection of letters number carries out a channel estimation, it is determined that the Channel Impulse on each transmitting antenna and each reception antenna rings
Estimate is answered, the channel impulse response matrix of pilot tone is obtained；
Auto-correlation computation is carried out to the channel impulse response matrix of the pilot tone, the autocorrelation matrix of pilot tone is obtained；
Eigenvalues Decomposition is carried out to the autocorrelation matrix of the pilot tone, the spatial coherence system of two stream of Uplink MIMO is obtained
Number.
It is specific it is determined that two stream space correlation property coefficient when：Channel is carried out firstly the need of the signal to receiving to estimate
Meter, wherein different channel estimation methods can be used, when carrying out channel estimation, it is necessary to obtain each transmitting antenna and each
Estimated value of channel impulse response on individual reception antenna.The channel impulse response for acquiring transmitting antenna and reception antenna is estimated
Value is write as the form of matrix, obtains the channel impulse response matrix of pilot tone.
Auto-correlation computation is carried out to the channel impulse response matrix of the pilot tone of acquisition, the channel auto-correlation square of pilot tone is drawn
Battle array, characteristic value solution is carried out to the channel autocorrelation matrix, then the space correlation property coefficient of two streams is the conditional number of matrix
Solving result.
For example, defined feature value λ is the solution for meeting linear equation det (A- λ I)=0, the characteristic value that solution is obtained is carried out
Sequence, show that conditional number cond (A) is defined asWhen channel is uncorrelated channel, then autocorrelation matrix
For a unit matrix, then each characteristic value of matrix is equal, and obtained conditional number is 1, and when channel is perfectly correlated, autocorrelation matrix is
One all 1's matrix, then the non-zero characteristic value of matrix only one of which, then conditional number is ∞.
Acquisition each flow received signal strength indicator (Received Signal Strength Indication,
When RSSI), estimation is currently each flowed when without MIMO, its possible RSSI, and the RSSI being represented to, the channel of the stream declines
Falling property degree, wherein RSSI can be added up by the mould side of reception signal and obtained.
When obtaining the Packet Error Ratio each flowed, according to CRC (Cyclic Redundancy Check, CRC)
The quantity of obtained current erroneous bag, and in upper layer information available current data packet quantity, obtain current each
The Packet Error Ratio of stream.
And after two space correlation property coefficients flowed are determined, and have selected received signal strength indicator and Packet Error Ratio
Afterwards, when determining corresponding MIMO switch modes according to above three parameter, including：
The Packet Error Ratio of selection and the Packet Error Ratio threshold value of setting are compared；
When the Packet Error Ratio of selection is less than the Packet Error Ratio threshold value of setting, according to current Uplink MIMO pattern, and two
The space correlation property coefficient of stream and the comparative result of the relative coefficient threshold value of setting, it is determined that the MIMO mode after switching；
When the Packet Error Ratio of selection is more than the Packet Error Ratio threshold value of setting, according to current Uplink MIMO pattern, two streams
Space correlation property coefficient with setting relative coefficient threshold value comparative result, and selection received signal strength indicator with setting
The comparative result of fixed intensity instruction threshold value, it is determined that the MIMO mode after switching.
For convenience of description, the different comparative results of the Packet Error Ratio threshold value according to Packet Error Ratio from setting are illustrated respectively.
When the Packet Error Ratio of selection is less than the Packet Error Ratio threshold value of setting, it is determined that the MIMO mode after switching includes：
When it is determined that current Uplink MIMO pattern is MIMO mode As, by the space correlation property coefficient of two stream and setting
Relative coefficient threshold value is compared；
When the space correlation property coefficient of two stream is less than the relative coefficient threshold value of setting, it is determined that the MIMO moulds after switching
Formula is MIMO B-modes,
When the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, MIMO mode As are kept；
When it is determined that current Uplink MIMO pattern is space multiplexing mode, by the space correlation property coefficient of two stream and setting
Relative coefficient threshold value be compared；
When the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, increase the correlation of the setting
Property coefficient threshold value, does not switch to MIMO mode As, or not separation of copulating moth,
When the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, MIMO A moulds are not switched to
Formula, or not separation of copulating moth.
Fig. 3 for the present invention provide when selection the Packet Error Ratio be less than setting Packet Error Ratio threshold value when, Uplink MIMO mould
The handoff procedure of formula, the process comprises the following steps：
S301：Base station is when getting radiation pattern that current transmission system uses for MIMO method, and docking, which is collected mail, number enters
Row channel estimation, determines the space correlation property coefficient of two stream of Uplink MIMO.
S302：Estimation currently each flows the received signal strength indicator under non-MIMO mode.
S303：The quantity of each stream current erroneous packet obtained according to verification, and obtained according in upper layer message
Each stream current data packet quantity, it is determined that the Packet Error Ratio each flowed.
S304：Selection two stream received signal strength indicator smaller value, and Packet Error Ratio higher value.
S305：The Packet Error Ratio of selection and the Packet Error Ratio threshold value of setting are compared, and are less than in the Packet Error Ratio
The Packet Error Ratio threshold value of setting, and during the currently employed MIMO mode As of terminal, step S306 is carried out, when the currently employed space of terminal is multiple
When using pattern, step S309 is carried out.
S306：Judge whether the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, when judgement knot
Fruit is when being, carries out step S307, otherwise, carries out step S308.
S307：Determine that terminal need not carry out the switching of MIMO mode, therefore, base station is not switched to now to terminal feedback
The announcement information of MIMO B-modes.
Differentiated according to channel relevancy coefficient, two obtained fluid space relative coefficient and predetermined correlation system
Number threshold values compare, if two fluid space relative coefficients are big, illustrates that the spatial coherence for working as the first two stream is stronger, be not suitable for into
The MIMO mode of row spatial reuse；If conversely, two fluid space relative coefficients are smaller, illustrating to work as the first two fluid space correlation
It is weaker, it is appropriate for the MIMO mode of spatial reuse.
S308：Determine that terminal needs to be switched to MIMO B-modes, therefore, base station now sends to terminal and is switched to MIMO B
The announcement information of pattern.
S309：Judge whether the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, when judgement knot
Fruit is when being, carries out step S310, otherwise, carries out step S311.
S310：Increase the relative coefficient threshold value of the setting, do not determine terminal without switch to MIMO mode As or not
Separation of copulating moth is carried out, therefore, now base station does not switch to MIMO mode As or the announcement information without separation of copulating moth to terminal feedback.
S311：Terminal is determined without switch to MIMO mode As or without separation of copulating moth, therefore, now base station is anti-to terminal
Feedback does not switch to MIMO mode As or the announcement information without separation of copulating moth.
In the present invention when the Packet Error Ratio of selection is more than the Packet Error Ratio threshold value of setting, and the current Uplink MIMO mould of determination
Formula is MIMO mode As, or during MIMO B-modes, it is determined that the MIMO mode after switching includes：
When it is determined that current Uplink MIMO pattern is MIMO mode As, MIMO mode As are kept, and notify terminal to improve hair
Penetrate power；
When it is determined that current Uplink MIMO pattern is MIMO B-modes, by the space correlation property coefficient of two stream and setting
Relative coefficient threshold value is compared；
When the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, it is determined that the MIMO moulds after switching
Formula is MIMO B-modes,
It is when the space correlation property coefficient of two stream is less than the relative coefficient threshold value of setting, the reception signal of selection is strong
Degree indicates to be compared with the intensity instruction threshold value set,
When the received signal strength indicator of selection is more than the intensity instruction threshold value of setting, reduce the relevance threshold, and
It is determined that the MIMO mode after switching is MIMO mode As,
When the received signal strength indicator of selection is less than the intensity instruction threshold value of setting, terminal is notified to improve transmission power,
And keep current MIMO mode.
In addition, in the present invention when it is determined that current Uplink MIMO pattern is collaboration MIMO pattern, the Packet Error Ratio of selection
More than setting Packet Error Ratio threshold value when, it is determined that switching after MIMO mode include：
The space correlation property coefficient of two stream and the relative coefficient threshold value of setting are compared；
When the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, terminal separation of copulating moth is notified,
It is when the space correlation property coefficient of two stream is less than the relative coefficient threshold value of setting, the reception signal of selection is strong
Degree indicates to be compared with the intensity instruction threshold value set,
When the received signal strength indicator of selection is more than the intensity instruction threshold value of setting, reduce the relevance threshold, and
It is determined that terminal separation of copulating moth is notified,
When the received signal strength indicator of selection is less than the intensity instruction threshold value of setting, terminal is notified to improve transmission power,
Not separation of copulating moth.
Fig. 4 is more than a kind of up multiple-input and multiple-output MIMO of the Packet Error Ratio threshold value of setting for the Packet Error Ratio that the present invention is provided
The detailed process schematic diagram switched between pattern, the handoff procedure includes following steps：
S401：Base station judges the emission mode of the up use of current transmission system, when the current up use MIMO moulds of judgement
During formula, step S402 is carried out, otherwise, is switched without MIMO mode.
Wherein, base station gets the radiation pattern of current transmission system use, is disappeared by directly reading Mac To Phy
What breath was obtained.
S402：The docking collection of letters number carries out a channel estimation, determines the space correlation property coefficient of two stream of Uplink MIMO.
S403：Estimation currently each flows the received signal strength indicator under non-MIMO mode.
S404：The quantity of each stream current erroneous packet obtained according to verification, and obtained according in upper layer message
Each stream current data packet quantity, it is determined that the Packet Error Ratio each flowed.
S405：Selection two stream received signal strength indicator smaller value, and Packet Error Ratio higher value.
S406：The Packet Error Ratio of selection and the Packet Error Ratio threshold value of setting are compared, and are more than in the Packet Error Ratio
The Packet Error Ratio threshold value of setting, and during the currently employed MIMO mode As of terminal, step S407 is carried out, as the currently employed MIMO B of terminal
During pattern, step S408 is carried out, when the currently employed collaboration MIMO pattern of terminal, step S413 is carried out.
S407：Determine that terminal needs to improve transmission power, and without switch to MIMO B, that is, keep current MIMO A moulds
Formula, therefore, now base station notifies terminal to improve transmission power, and keeps current MIMO mode As.
S408：Judge whether the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, when judgement knot
Fruit is when being, carries out step S409, otherwise, carries out step S410.
S409：Determine that terminal needs to be switched to MIMO mode As, therefore, now base station sends to terminal and is switched to MIMO A
The announcement information of pattern.
S410：Judge whether the RSSI currently selected is more than the RSSI threshold values of setting, when judged result is to be, walked
Rapid S411, otherwise, carries out step S412.
The RSSI of selection is compared with predetermined RSSI threshold values, if the RSSI of selection is larger, illustrates the channel that stream passes through
Fading severity is smaller, it is not necessary to which terminal improves transmission power or the processing of modulating-coding depression of order again；Conversely, then needing terminal to improve
Transmission power or the processing of modulating-coding depression of order.
S411：Increase the relative coefficient threshold value of the setting, and determine that terminal needs to be switched to MIMO mode As, because
This, now, base station sends the announcement information for being switched to MIMO mode As to terminal.
S412：Determine that terminal needs to improve transmission power, and without switch to MIMO B, that is, keep current MIMO A moulds
Formula, therefore, now base station notifies terminal to improve transmission power, and keeps current MIMO mode As.
S413：Judge whether the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, when judgement knot
Fruit is when being, carries out step S414, otherwise, carries out step S415.
S414：Terminal separation of copulating moth is determined, without collaboration MIMO pattern, therefore, now base station sends separation of copulating moth to terminal, does not enter
The announcement information of row collaboration MIMO pattern.
S415：Judge whether the RSSI currently selected is more than the RSSI threshold values of setting, when judged result is to be, walked
Rapid S416, otherwise, carries out step S417.
S416：Increase the relative coefficient threshold value of the setting, and determine terminal separation of copulating moth, without collaboration MIMO A moulds
Formula, therefore, now, base station sends separation of copulating moth to terminal, without the announcement information of collaboration MIMO pattern.
S417：Determine that terminal needs to improve transmission power, and do not need separation of copulating moth, therefore, now base station notifies terminal to improve
Transmission power, and keep current cooperative MIMO mode As.
The structural representation of switching device between a kind of up multiple-input and multiple-output MIMO mode that Fig. 5 provides for the present invention,
Described device includes：
First determining module 51 is right for when getting radiation pattern that current transmission system uses for MIMO method
Receive signal and carry out channel estimation, determine the space correlation property coefficient of two stream of Uplink MIMO；
Estimation module 52, for estimating currently each to flow the received signal strength indicator under non-MIMO mode；
Second determining module 53, for the quantity according to the current wrong data bag of the obtained each stream of verification, Yi Jigen
According to the current data packet number of each stream obtained in upper layer message, it is determined that the Packet Error Ratio each flowed；
Compare determining module 54, for select two stream received signal strength indicator smaller value, and Packet Error Ratio compared with
Big value, according to the space correlation property coefficient of two stream, the received signal strength indicator and Packet Error Ratio of selection, it is determined that on corresponding
Row MIMO switch modes.
Described device also includes：
Notification module 55, for the Uplink MIMO pattern notification after the switching by determination to terminal.
First determining module 51, collects mail specifically for docking and number carries out a channel estimation, it is determined that each transmitting antenna and every
Estimated value of channel impulse response on individual reception antenna, obtains the channel impulse response matrix of pilot tone；To the channel of the pilot tone
The shock response matrix carries out auto-correlation computation, obtains the autocorrelation matrix of pilot tone；Spy is carried out to the autocorrelation matrix of the pilot tone
Value indicative is decomposed, and obtains the space correlation property coefficient of two stream of Uplink MIMO.
Compare determining module 54, specifically for the Packet Error Ratio of selection and the Packet Error Ratio threshold value of setting are compared；
When the Packet Error Ratio of selection is less than the Packet Error Ratio threshold value of setting, according to the space of current Uplink MIMO pattern, and two stream
Relative coefficient and the comparative result of the relative coefficient threshold value of setting, it is determined that the MIMO mode after switching；When described in selection
When Packet Error Ratio is more than the Packet Error Ratio threshold value of setting, according to current Uplink MIMO pattern, the space correlation property coefficient of two stream is with setting
The comparative result of fixed relative coefficient threshold value, and the received signal strength indicator selected and the ratio of the intensity instruction threshold value of setting
Relatively result, it is determined that the MIMO mode after switching.
Compare determining module 54, specifically for when the Packet Error Ratio of selection is less than the Packet Error Ratio threshold value of setting, when true
When settled preceding Uplink MIMO pattern is MIMO mode As, by the space correlation property coefficient of two stream and the relative coefficient threshold of setting
Value is compared；When the space correlation property coefficient of two stream is less than the relative coefficient threshold value of setting, it is determined that after switching
MIMO mode is MIMO B-modes, when the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, is kept
MIMO mode As；When it is determined that current Uplink MIMO pattern is space multiplexing mode, by the space correlation property coefficients of two stream with
The relative coefficient threshold value of setting is compared；When the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting
When, increase the relative coefficient threshold value of the setting, do not switch to MIMO mode As, or not separation of copulating moth, when the space phase of two stream
When closing property coefficient less than the relative coefficient threshold value set, MIMO mode As, or not separation of copulating moth are not switched to.
Compare determining module 54, current Uplink MIMO pattern is determined for MIMO mode As specifically for working as, or MIMO B moulds
Formula, when the Packet Error Ratio of selection is more than the Packet Error Ratio threshold value of setting, when it is determined that current Uplink MIMO pattern is MIMO mode As
When, MIMO mode As are kept, and notify terminal to improve transmission power；When it is determined that current Uplink MIMO pattern is MIMO B-modes
When, the space correlation property coefficient of two stream and the relative coefficient threshold value of setting are compared；When the space correlation of two stream
When property coefficient is more than the relative coefficient threshold value of setting, it is determined that the MIMO mode after switching is MIMO B-modes, flowed when two
When space correlation property coefficient is less than the relative coefficient threshold value of setting, by the received signal strength indicator of selection and the intensity of setting
Instruction threshold value is compared, and when the received signal strength indicator of selection is more than the intensity instruction threshold value of setting, reduces the correlation
Property threshold value, and determine switching after MIMO mode be MIMO mode As, when selection received signal strength indicator be less than setting
Intensity instruction threshold value, notifies terminal to improve transmission power, and keep current MIMO mode.
Compare determining module 54, specifically for being collaboration MIMO pattern, the institute of selection when the current Uplink MIMO pattern of determination
When stating Packet Error Ratio more than the Packet Error Ratio threshold value set, by the space correlation property coefficients of two stream and the relative coefficient threshold value of setting
It is compared；When the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, terminal separation of copulating moth is notified, when two
When the space correlation property coefficient of individual stream is less than the relative coefficient threshold value of setting, by the received signal strength indicator of selection and setting
Intensity instruction threshold value be compared, when selection received signal strength indicator be more than setting intensity instruction threshold value, reduce institute
Relevance threshold is stated, and determines to notify terminal separation of copulating moth, when the intensity that the received signal strength indicator of selection is less than setting indicates threshold
Value, notifies terminal to improve transmission power, not separation of copulating moth.
Specific said apparatus can be located in base station.
The invention provides a kind of Uplink MIMO pattern method for switching between, device and equipment, in the method, base station, which is worked as, to be obtained
When getting radiation pattern that current transmission system uses for MIMO method, docking, which is collected mail, number carries out a channel estimation, determines up
The space correlation property coefficient of two streams of MIMO；And obtain and each flow received signal strength indicator under non-MIMO mode and often
The Packet Error Ratio of individual stream；Selection two stream received signal strength indicator smaller value, and Packet Error Ratio higher value, according to two stream
Space correlation property coefficient, the received signal strength indicator and Packet Error Ratio of selection, it is determined that corresponding Uplink MIMO switch mode.
Due in the present invention by two stream space correlation property coefficients, selection received signal strength indicator smaller value and
The higher value of Packet Error Ratio is compared with the respective threshold set, it is determined that corresponding Uplink MIMO switch mode, it is achieved thereby that
The pattern switching of Uplink MIMO, therefore, obtains more preferable transmission performance.
A preferred embodiment of the present invention has shown and described in described above, but as previously described, it should be understood that the present invention
Be not limited to form disclosed herein, be not to be taken as the exclusion to other embodiment, and available for various other combinations,
Modification and environment, and above-mentioned teaching or the technology or knowledge of association area can be passed through in invention contemplated scope described herein
It is modified., then all should be in this hair and the change and change that those skilled in the art are carried out do not depart from the spirit and scope of the present invention
In the protection domain of bright appended claims.
Claims (13)
1. a kind of up multiple-input and multiple-output MIMO mode method for switching between, it is characterised in that methods described includes：
Base station is when getting radiation pattern that current transmission system uses for MIMO method, and docking, which is collected mail, number to be carried out a channel and estimate
Meter, determines the space correlation property coefficient of two stream of Uplink MIMO；
Estimation currently each flows the received signal strength indicator under non-MIMO mode；
The quantity of each stream current erroneous packet obtained according to verification, and worked as according to each stream obtained in upper layer message
Preceding data packet number, it is determined that the Packet Error Ratio each flowed；
Selection two stream received signal strength indicator smaller value, and Packet Error Ratio higher value, according to two stream space phases
Property coefficient, the received signal strength indicator and Packet Error Ratio of selection are closed, it is determined that corresponding Uplink MIMO switch mode；
Wherein, it is described according to two space correlation property coefficients flowed, the received signal strength indicator and Packet Error Ratio of selection, it is determined that
Corresponding Uplink MIMO switch mode, including：The Packet Error Ratio of selection and the Packet Error Ratio threshold value of setting are compared；It is elected
When the Packet Error Ratio selected is less than the Packet Error Ratio threshold value of setting, according to the space correlation of current Uplink MIMO pattern, and two stream
Property coefficient and the comparative result of the relative coefficient threshold value of setting, it is determined that the MIMO mode after switching；Described when selection is wrapped by mistake
When rate is more than the Packet Error Ratio threshold value of setting, according to current Uplink MIMO pattern, space correlation property coefficient and the setting of two stream
The comparative result of relative coefficient threshold value, and the received signal strength indicator selected and the comparison knot of the intensity instruction threshold value of setting
Really, it is determined that switching after MIMO mode.
2. the method as described in claim 1, it is characterised in that methods described also includes：
The base station is by the Uplink MIMO pattern notification after the switching of determination to terminal.
3. the method as described in claim 1, it is characterised in that the space correlation property coefficient of two stream of determination Uplink MIMO
Including：
The docking collection of letters number carries out a channel estimation, it is determined that the channel impulse response on each transmitting antenna and each reception antenna is estimated
Evaluation, obtains the channel impulse response matrix of pilot tone；
Auto-correlation computation is carried out to the channel impulse response matrix of the pilot tone, the autocorrelation matrix of pilot tone is obtained；
Eigenvalues Decomposition is carried out to the autocorrelation matrix of the pilot tone, the space correlation property coefficient of two stream of Uplink MIMO is obtained.
4. the method as described in claim 1, it is characterised in that when the Packet Error Ratio of selection is less than the Packet Error Ratio threshold value of setting
When, it is determined that the MIMO mode after switching includes：
It is when it is determined that current Uplink MIMO pattern is MIMO mode As, the space correlation property coefficient of two stream is related to setting
Property coefficient threshold value is compared；
When the space correlation property coefficient of two stream is less than the relative coefficient threshold value of setting, it is determined that the MIMO mode after switching is
MIMO B-modes,
When the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, MIMO mode As are kept；
When it is determined that current Uplink MIMO pattern is space multiplexing mode, by the space correlation property coefficient of two stream and the phase of setting
Property coefficient threshold value is closed to be compared；
When the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, increase the correlation system of the setting
Number threshold value, does not switch to MIMO mode As, or not separation of copulating moth,
When the space correlation property coefficient of two stream is less than the relative coefficient threshold value of setting, MIMO mode As are not switched to, or
Not separation of copulating moth.
5. the method as described in claim 1, it is characterised in that when it is determined that current Uplink MIMO pattern is MIMO mode As, or
MIMO B-modes, when the Packet Error Ratio of selection is more than the Packet Error Ratio threshold value of setting, it is determined that the MIMO mode after switching includes：
When it is determined that current Uplink MIMO pattern is MIMO mode As, MIMO mode As are kept, and notify terminal to improve transmitting work(
Rate；
It is when it is determined that current Uplink MIMO pattern is MIMO B-modes, the space correlation property coefficient of two stream is related to setting
Property coefficient threshold value is compared；
When the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, it is determined that the MIMO mode after switching is
MIMO mode As,
When the space correlation property coefficient of two stream is less than the relative coefficient threshold value of setting, the received signal strength of selection is referred to
Show and be compared with the intensity instruction threshold value set,
When the received signal strength indicator of selection is more than the intensity instruction threshold value of setting, increase the relevance threshold, and determine
MIMO mode after switching is MIMO mode As,
When the received signal strength indicator of selection is less than the intensity instruction threshold value of setting, terminal is notified to improve transmission power, and protect
Hold current MIMO mode.
6. the method as described in claim 1, it is characterised in that when it is determined that current Uplink MIMO pattern is collaboration MIMO pattern,
When the Packet Error Ratio of selection is more than the Packet Error Ratio threshold value of setting, it is determined that the MIMO mode after switching includes：
The space correlation property coefficient of two stream and the relative coefficient threshold value of setting are compared；
When the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, terminal separation of copulating moth is notified,
When the space correlation property coefficient of two stream is less than the relative coefficient threshold value of setting, the received signal strength of selection is referred to
Show and be compared with the intensity instruction threshold value set,
When the received signal strength indicator of selection is more than the intensity instruction threshold value of setting, increase the relevance threshold, and determine
Terminal separation of copulating moth is notified,
When the received signal strength indicator of selection is less than the intensity instruction threshold value of setting, notifies terminal to improve transmission power, do not tear open
It is right.
7. switching device between a kind of up multiple-input and multiple-output MIMO mode, it is characterised in that described device includes：
First determining module, for when getting radiation pattern that current transmission system uses for MIMO method, docking to be collected mail
Number channel estimation is carried out, determine the space correlation property coefficient of the stream of Uplink MIMO two；
Estimation module, for estimating currently each to flow the received signal strength indicator under non-MIMO mode；
Second determining module, for the quantity according to the current wrong data bag of the obtained each stream of verification, and according to upper strata
The current data packet number of each stream for being obtained in message, it is determined that the Packet Error Ratio each flowed；
Compare determining module, for the higher value of the smaller value of the received signal strength indicator of two stream of selection, and Packet Error Ratio, root
According to the space correlation property coefficient of two stream, the received signal strength indicator and Packet Error Ratio of selection, it is determined that corresponding Uplink MIMO
Switch mode；
Wherein, determining module is compared, specifically for the Packet Error Ratio of selection and the Packet Error Ratio threshold value of setting are compared；When
When the Packet Error Ratio of selection is less than the Packet Error Ratio threshold value of setting, according to the space phase of current Uplink MIMO pattern, and two stream
Property coefficient and the comparative result of the relative coefficient threshold value of setting are closed, it is determined that the MIMO mode after switching；When the mistake of selection
When bag rate is more than the Packet Error Ratio threshold value of setting, according to current Uplink MIMO pattern, space correlation property coefficient and the setting of two stream
Relative coefficient threshold value comparative result, and selection received signal strength indicator with setting intensity instruction threshold value comparison
As a result, it is determined that switching after MIMO mode.
8. device as claimed in claim 7, it is characterised in that described device also includes：
Notification module, for the Uplink MIMO pattern notification after the switching by determination to terminal.
9. device as claimed in claim 7, it is characterised in that the first determining module, is believed specifically for the docking collection of letters number
Road is estimated, it is determined that the estimated value of channel impulse response on each transmitting antenna and each reception antenna, obtains the channel of pilot tone
The shock response matrix；Auto-correlation computation is carried out to the channel impulse response matrix of the pilot tone, the autocorrelation matrix of pilot tone is obtained；
Eigenvalues Decomposition is carried out to the autocorrelation matrix of the pilot tone, the space correlation property coefficient of two stream of Uplink MIMO is obtained.
10. device as claimed in claim 7, it is characterised in that compare determining module, specifically for being wrapped when the described of selection by mistake
When rate is less than the Packet Error Ratio threshold value of setting, when it is determined that current Uplink MIMO pattern is MIMO mode As, by the space of two stream
Relative coefficient is compared with the relative coefficient threshold value set；When the space correlation property coefficient of two stream is less than the phase of setting
When closing property coefficient threshold value, it is determined that the MIMO mode after switching is MIMO B-modes, when the space correlation property coefficient of two streams is more than
During the relative coefficient threshold value of setting, MIMO mode As are kept；When it is determined that current Uplink MIMO pattern is space multiplexing mode,
The space correlation property coefficient of two stream and the relative coefficient threshold value of setting are compared；When the spatial coherence system of two stream
When number is more than the relative coefficient threshold value set, increases the relative coefficient threshold value of the setting, do not switch to MIMO mode As,
Or not separation of copulating moth, when the space correlation property coefficients of two stream are less than the relative coefficient threshold value of setting, do not switch to MIMO A moulds
Formula, or not separation of copulating moth.
11. device as claimed in claim 7, it is characterised in that compare determining module, specifically for current up when determining
MIMO mode is MIMO mode As, or MIMO B-modes, when the Packet Error Ratio of selection is more than the Packet Error Ratio threshold value of setting, when true
When settled preceding Uplink MIMO pattern is MIMO mode As, MIMO mode As are kept, and notify terminal to improve transmission power；When it is determined that
When current Uplink MIMO pattern is MIMO B-modes, by the space correlation property coefficient of two stream and the relative coefficient threshold value of setting
It is compared；When the space correlation property coefficient of two stream is more than the relative coefficient threshold value of setting, it is determined that the MIMO after switching
Pattern is MIMO mode As, when the space correlation property coefficient of two stream is less than the relative coefficient threshold value of setting, by selection
Received signal strength indicator is compared with the intensity instruction threshold value set, when the received signal strength indicator of selection is more than setting
Intensity instruction threshold value, increase the relevance threshold, and determine that the MIMO mode after switching is MIMO mode As, when selection
Received signal strength indicator is less than the intensity instruction threshold value of setting, notifies terminal to improve transmission power, and keep current MIMO
Pattern.
12. device as claimed in claim 7, it is characterised in that compare determining module, specifically for current up when determining
MIMO mode is collaboration MIMO pattern, when the Packet Error Ratio of selection is more than the Packet Error Ratio threshold value of setting, by the space of two stream
Relative coefficient is compared with the relative coefficient threshold value set；When the space correlation property coefficient of two stream is more than the phase of setting
When closing property coefficient threshold value, terminal separation of copulating moth is notified, when the space correlation property coefficient of two stream is less than the relative coefficient threshold value of setting
When, the received signal strength indicator of selection and the intensity instruction threshold value of setting are compared, when the received signal strength of selection
The intensity instruction threshold value more than setting is indicated, increases the relevance threshold, and determines to notify terminal separation of copulating moth, when the reception of selection
Signal intensity indicates the intensity instruction threshold value less than setting, notifies terminal to improve transmission power, not separation of copulating moth.
13. a kind of base station, it is characterised in that including the device as described in any in claim 7 to 11.
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| CN201110159288.3A CN102832980B (en) | 2011-06-14 | 2011-06-14 | A kind of Uplink MIMO pattern method for switching between, device and equipment |
| PCT/CN2011/081207 WO2012171292A1 (en) | 2011-06-14 | 2011-10-24 | Method, apparatus and device for switching between uplink mimo modes |
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| CN105519060B (en) * | 2015-09-24 | 2018-09-14 | 香港应用科技研究院有限公司 | The method and apparatus that channel estimation is carried out in the extensive mimo system of multi-user |
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| CN1862997B (en) * | 2005-05-11 | 2010-06-16 | 中兴通讯股份有限公司 | Method for discriminating space relativity and method for regulating working mode of multi-antenna system |
| US8068566B2 (en) * | 2007-07-31 | 2011-11-29 | Intel Corporation | Unified multi-mode receiver detector |
| US8098752B2 (en) * | 2007-07-31 | 2012-01-17 | Samsung Electronics Co., Ltd. | Apparatus and method for supporting a plurality of MIMO modes in a wireless communication system |
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