CN107846266A - Running time-frequency resource dispatching space division method and apparatus - Google Patents
Running time-frequency resource dispatching space division method and apparatus Download PDFInfo
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- CN107846266A CN107846266A CN201610826236.XA CN201610826236A CN107846266A CN 107846266 A CN107846266 A CN 107846266A CN 201610826236 A CN201610826236 A CN 201610826236A CN 107846266 A CN107846266 A CN 107846266A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
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Abstract
The invention discloses a kind of running time-frequency resource dispatching space division method and apparatus, this method includes：Calculate the channel relevancy of multiple terminals；Obtain the schedule information of multiple terminals；According to the channel relevancy of multiple terminals and the schedule information of multiple terminals, multiple terminals are divided into one or more space division set of terminal；According to one or more space division set of terminal and the wherein schedule information of terminal, the scheduling parameter of multiple space division set of terminal in this scheduling is calculated；According to the running time-frequency resource of space division and the scheduling parameter of one or more space division set of terminal, calculating is actually used in the space division set of terminal of dispatching space division and is wherein actually used in the terminal quantity of dispatching space division, selects corresponding terminal and distributes running time-frequency resource to be scheduled.Technical scheme is suitable to dispatching space division, so as to give full play to the ability of dispatching space division, is advantageous to lift channel capacity and improves the efficiency of running time-frequency resource scheduling.
Description
Technical field
The present invention relates to field of wireless communication, more particularly to a kind of running time-frequency resource dispatching space division method and apparatus.
Background technology
MIMO (Multiple Input Multiple Output, multiple-input, multiple-output) technology is LTE (Long Term
Evolution, Long Term Evolution) system core technology, by transmitting terminal and receiving terminal respectively using more transmitting antennas and
More reception antennas, by sending and receiving for more antennas, in the case where not increasing running time-frequency resource, lifting system is believed at double
Road capacity.
Exactly because the importance of MIMO technology, since the Rel-8 versions of LTE protocol, it is proposed that 8 kinds of downlink transfer moulds
Formula, start to introduce MIMO and SDMA (Spatial Division Multiple Access, space division multiplexing) technology.3GPP(3rd
Generation Partnership Project, 3G (Third Generation) Moblie partnership) constantly pass through the renewal to LTE protocol
To support the SDMA abilities of higher order, and then lifting system channel capacity.3GPP is in Rel- that is normalized but not freezing also
FD-MIMO (Full-Dimension MIMO, omnidirectional MIMO) is proposed in 13 agreements, by means of large-scale antenna array technology
(disturb using 64,128,256 even more antenna oscillators, reductions, improve Signal-to-Noise, promotion signal transmitting-receiving performance.)
Realize the space division multiplexing ability of higher order.
FD-MIMO systems support 64,128,256 or even more antenna oscillators.With the increase of antenna oscillator number, system
Channel capacity can lift more times of existing antenna system.The SDMA of high-order appearance, the scheduling band to wireless telecommunication system
Challenge is newly carried out.At this stage for 2 streams, the dispatching method and resource distribution mode of 4 stream air separating abilities, high-order can not be met
SDMA requirement.Significant challenge is embodied in following four aspects：
First, time-frequency resource allocating：For 2 streams, 4 stream SDMA dispatching method, the flow gain that space division is brought is limited, therefore
Typically use the resource distribution mode of preferential frequency division.But under higher order SDMA ability conditions, if still using preferential frequency
The resource regulating method divided, then can not give full play to the SDMA abilities of system, can cause the waste of running time-frequency resource；
2nd, inter-stream interference：The SDMA systems of high-order compare the SDMA systems of low order, easily produce stronger inter-stream interference.
In the case of stronger inter-stream interference, how to determine scheduling parameter, overcome inter-stream interference, be that high-order SDMA scheduling needs to solve
Problem；
3rd, multi-user's multi-service type：Under commercial existing network environment, user type and type of service are rich and varied, existing
Big business packet user, also there is small business packet user；Existing real time business, there is non-real-time service again.How to make full use of space division more
Flow Technique advantage, various types of business that scheduling bag is of different sizes, packet delay is different, improve spectrum efficiency；
4th, to the processing of scheduling process and scheduling parameter：Scheduling is joined if continuing to use under low order SDMA technical conditions
Number, including but not limited to BLER (Block Error Ratio, Block Error Rate), CQI (Channel Quality Indicator,
Channel quality indicate), SINR (Signal to Interference plus Noise Ratio, signal and interference-to-noise ratio),
BSR (Buffer Status Report, Buffer Status Report) etc. processing is inappropriate.Such as the space division of downlink business
Multiplexing, simultaneously participating in the UE (User Equipment, terminal, user equipment) of dispatching space division needs distribution power, in each UE
In the case that the power that can obtain is lower, how the MCS of scheduling (modulation and coding strategy) determined according to SINR, CQI, this
Individual processing is different under higher order SDMA technical conditions.
4 points above, it is proposed that four main key issues, and carry out lifting system using higher order SDMA technologies and believe
Road capacity needs to solve the problems, such as.
The content of the invention
In view of this, it is an object of the invention to provide a kind of running time-frequency resource dispatching space division method and apparatus, to lift letter
Road capacity, realize efficiently scheduling running time-frequency resource.
Technical scheme is as follows used by the present invention solves above-mentioned technical problem：
According to an aspect of the present invention, there is provided a kind of running time-frequency resource dispatching space division method, including：Calculate multiple terminals
Channel relevancy；Obtain the schedule information of the multiple terminal；According to the channel relevancy of the multiple terminal and described
The schedule information of multiple terminals, the multiple terminal is divided into one or more space division set of terminal；According to one or more of
The schedule information of space division set of terminal and wherein terminal, calculate the scheduling parameter of multiple space division set of terminal described in this scheduling；
According to the running time-frequency resource of space division and the scheduling parameter of one or more of space division set of terminal, calculating is actually used in dispatching space division
Space division set of terminal and be wherein actually used in the terminal quantity of dispatching space division, select corresponding terminal simultaneously to distribute running time-frequency resource to enter
Row scheduling.
Alternatively, foregoing method, according to the multiple space division set of terminal and the wherein schedule information of terminal, this is calculated
The scheduling parameter of one or more space division set of terminal, is specifically included described in secondary scheduling：It is whole according to one or more of space divisions
The schedule information of end group and wherein terminal, calculate the space division fluxion initial value of this scheduling；According to the space division fluxion initial value, estimate
Calculate influences caused by inter-stream interference；According to estimation result, the scheduling parameter of the multiple space division set of terminal is calculated.
Alternatively, foregoing method, according to the scheduling of the channel relevancy of the multiple terminal and the multiple terminal
Information, the multiple terminal is divided into one or more space division set of terminal, specifically included：According to the channel phase of the multiple terminal
Closing property and channel priority, the optional terminal set of space division is marked off from the multiple terminal；To the optional terminal set of the space division
In terminal, be one or more of space division set of terminal according to corresponding schedule information partitioning.
Alternatively, foregoing method, to the terminal in the optional terminal set of the space division, drawn according to corresponding schedule information
Point-score is one or more of space division set of terminal, is specifically included：It is excellent according to the channel relevancy of the multiple terminal and channel
First level, the terminal in the optional terminal set of the space division is sorted；According to the sequence of terminal in the optional terminal set of the space division
Terminal is obtained, and acquired terminal institute is included according to the channel relevancy of acquired terminal and other-end, schedule information, division
Space division set of terminal.
Alternatively, foregoing method, comprising the terminal for carrying out retransmission operation in the multiple terminal, and the number retransmitted is small
In predetermined threshold value.
According to another aspect of the present invention, there is provided a kind of running time-frequency resource dispatching space division device, including：Channel relevancy
Module, for calculating the channel relevancy of multiple terminals；Schedule information module, the scheduling for obtaining the multiple terminal are believed
Breath；Space division set of terminal module, for the channel relevancy according to the multiple terminal and the schedule information of the multiple terminal,
The multiple terminal is divided into one or more space division set of terminal；Scheduling parameter module, for according to one or more of skies
Divide set of terminal and the wherein schedule information of terminal, calculate the scheduling parameter of multiple space division set of terminal described in this scheduling；Adjust
Module is spent, for the running time-frequency resource according to space division and the scheduling parameter of one or more of space division set of terminal, is calculated actual
For dispatching space division space division set of terminal and be wherein actually used in the terminal quantity of dispatching space division, select corresponding terminal simultaneously to distribute
Running time-frequency resource is to be scheduled.
Alternatively, foregoing device, the scheduling parameter module according to one or more of space division set of terminal and its
The schedule information of middle terminal, the space division fluxion initial value of this scheduling is calculated, and according to the space division fluxion initial value, estimated between flowing
Influenceed caused by interference, and according to estimation result, calculate the scheduling parameter of the multiple space division set of terminal.
Alternatively, foregoing device, the space division set of terminal module is according to the channel relevancy and letter of the multiple terminal
Road priority, the optional terminal set of space division is marked off from the multiple terminal, and in the optional terminal set of the space division
Terminal, it is one or more of space division set of terminal according to corresponding schedule information partitioning.
Alternatively, foregoing device, the space division set of terminal module is according to the channel relevancy and letter of the multiple terminal
Road priority, the terminal in the optional terminal set of the space division is sorted, and according to whole in the optional terminal set of the space division
The sequence at end obtains terminal, and includes and obtained according to the channel relevancy of acquired terminal and other-end, schedule information, division
Take the space division set of terminal where terminal.
Alternatively, foregoing device, comprising the terminal for carrying out retransmission operation in the multiple terminal, and the number retransmitted is small
In predetermined threshold value.
According to above technical scheme, it is known that running time-frequency resource dispatching space division method and apparatus of the invention at least have following excellent
Point：
In technical scheme, terminal is divided into multiple space division set of terminal by the channel relevancy of terminal, it is multiple
Channel relevancy between space division set of terminal is relatively low, is adapted for dispatching space division；And determined according to the schedule information of terminal
The scheduling parameter used in scheduling, so as to smoothly complete dispatching space division；Technical scheme is suitable to dispatching space division,
So as to give full play to the ability of dispatching space division, be advantageous to lift channel capacity and improve the efficiency of running time-frequency resource scheduling.
Brief description of the drawings
Fig. 1 is a kind of flow chart of running time-frequency resource dispatching space division method of the embodiment of the present invention；
Fig. 2 is a kind of flow chart of running time-frequency resource dispatching space division method of the embodiment of the present invention；
Fig. 3 is a kind of block diagram of running time-frequency resource dispatching space division device of the embodiment of the present invention；
Fig. 4 is a kind of schematic diagram of running time-frequency resource dispatching space division device of the embodiment of the present invention；
Fig. 5 is a kind of schematic diagram of running time-frequency resource dispatching space division device of the embodiment of the present invention.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
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.
As shown in figure 1, a kind of running time-frequency resource dispatching space division method is provided in one embodiment of the present of invention, including：
Step S110, calculate the channel relevancy of multiple terminals.In the present embodiment, the channel handled between different UE is related
Property, including between different UE channel relevancy reception.For TDD (Time Division Duplexing, time division multiplexing) system
System, can be by detecting the pilot tone of different terminals transmission come the channel relevancy between computing terminal；For FDD (Frequency
Division Duplex, frequency division multiplexing) system, terminal detection down channel RS (Reference Signal, pilot tone) signal,
Channel information, and the channel information that the reporting channel information got is reported to base station, base station according to UE is calculated, carries out
The calculating and judgement of channel relevancy.
Channel relevancy is smooth between UE：Time variation based on wireless channel under large scale fading channel environment and unstable
Property, the channel relevancy received is needed to carry out the disposal of gentle filter.
Represent the relevance values that will be obtained after current filter；
Represent the relevance values that last time filtering obtains afterwards；
Corrn：Represent currently available correlation instantaneous value；
α：Represent filter factor, span [0,1].1 represents not filter.It can be adjusted, write from memory according to channel circumstance dynamic
1/16 can be taken by recognizing value.
Step S120, obtain the schedule information of multiple terminals.In the present embodiment, the schedule information of terminal includes but unlimited
In BLER, CQI, SINR, BSR etc..
Step S130, according to the channel relevancy of multiple terminals and the schedule information of multiple terminals, by multiple terminals point
For one or more space division set of terminal.In the present embodiment, the channel relevancy between different space division set of terminal is relatively low；In this reality
Apply in example, in scheduling according to the channel relevancy between different UE, participate in scheduling UE information, UE to be dispatched BSR/
The information such as SINR/CQI, it is determined that can be with the UE of space division and by the space division UE of screening according to the parameters such as UE BSR/SINR/CQI point
Group.In the present embodiment, because obtained space division UE groups are divided according to channel relevancy, mutual channel is related
Property is relatively low, so being adapted for dispatching space division.
Step S140, according to one or more space division set of terminal and the wherein schedule information of terminal, calculate this scheduling
In multiple space division set of terminal scheduling parameter.In the present embodiment, scheduling parameter includes but is not limited to MCS.
Step S150, according to the running time-frequency resource of space division and the scheduling parameter of one or more space division set of terminal, calculate real
Border is used for the space division set of terminal of dispatching space division and is wherein actually used in the terminal quantity of dispatching space division, selects corresponding terminal and divides
With running time-frequency resource to be scheduled.
As shown in Fig. 2 a kind of running time-frequency resource dispatching space division method is provided in one embodiment of the present of invention, including：
Step S210, calculate the channel relevancy of multiple terminals.In the present embodiment, calculate and safeguard different UE channel
Relevance values.Preferably, further to real-time channel correlation value can be handled, to avoid relevance values from shaking
Greatly.
Step S220, according to the channel relevancy and channel priority of multiple terminals, marking off space division from multiple terminals can
Select terminal set.In the present embodiment, the correlation according to UE between any two, safeguard that the optional user of space division collects Sselect, specific bag
Include：
Collect S from activation useracitveThe optional user of middle determination space division collects Sselect.M use is shared in user's set if activating
Family.During initialization, the optional user of space division is made to collect Sselect={ s1 }, s1 can be from SacitveThe middle use according to selection highest priority
Family.After starting scheduling, the user of the suitable space division in addition to S1 is concentrated from activation, is added to SselectIn；Do not exist simultaneously
SacitveIn user, it is necessary to from SselectDelete；In scheduling, by SacitveAnd SselectUE in set is grading according to dispatching priority
Row sequence；UE1, UE2..., UEn(II≤III), carried out from the sequence according to order from high to low；Traversal processing.According to
I is first traveled through, the rear order for traveling through j, handles COR successivelyI, j(1≤i ＜ n, 1 ＜ j≤n), CORi,jBetween expression UEi and UEj
Channel relevancy.If CORI, j＜ ThrCOR, then it represents that UEi and UEj channel is unrelated.ThrCORJudge for channel relevancy
Thresholding, it can be obtained from emulation or outfield actual verification.After i and j traversals are completed, the optional user's set of new space division is obtained
UE1′, UE2′..., UEn′(n '≤m), putting in order for UE in the set is scheduling according to UE channel relevancy and UE
Priority sorts, by channel relevancy is minimum, dispatching priority highest user comes foremost.
Step S230, obtain the schedule information of multiple terminals.Specifically, can include：
Receive and safeguard sacitveEach UE SINR value in queue, for supporting to dispatch.Preferably, to real-time SINR
Value further can be handled, to avoid SINR shakes excessive；
Receive and safeguard SacitveEach UE CQI value in queue.Preferably, real-time CQI value can be done further
Processing, to avoid CQI shakes excessive；
Receive and safeguard SacitveEach UE BLER values in queue.Preferably, BLER real-time to each UE can do into
The processing of one step, to avoid BLER shakes excessive；
Receive and safeguard SacitveEach UE BSR values in queue.It is inclined for BSR in the case where scheduling number of users is on the low side
Small UE, it is also contemplated that delay dispatching, the portfolio of increase single scheduling, lift air separation.
Step S240, to the terminal in the optional terminal set of space division, according to corresponding schedule information partitioning be one or
Multiple space division set of terminal.Based on foregoing teachings, in the present embodiment, according to the current optional user's set S of space divisionSelect=[UE1′,
UE2′..., UEn′] each UE SINR value, CQI value, BSR values and the MCS initial values of scheduling in (n '≤m), it is determined that carrying out space division
UE packet.Specifically include：
According to the channel relevancy and channel priority of multiple terminals, the terminal in the optional terminal set of space division is sorted；
Terminal is obtained according to the sequence of terminal in the optional terminal set of space division, and it is related to the channel of other-end according to acquired terminal
Property, schedule information, division includes the space division set of terminal where acquired terminal.In this embodiment, it is preferred that can be with scheduling
UE is ranked up by the channel priority for considering correlation coefficient value and UE, and it is above that correlation is low and channel is excellent to come
The high UE of first level.Then according to UE sequence lists, according to UE order, with reference to UE BSR, SINR and CQI, space division UE is carried out
Packet.The purpose of packet be in UE sequence lists, meet channel relevancy be less than dynamic threshold in the case of, as far as possible by BSR,
UE similar in SINR and CQI points in same space division group.The result of packet space division UE groups table and space division UE schedule information tables
Form safeguarded.
A kind of example of space division result is the following described, space division UE groups are stored in space division UE group tables；Assuming that space division
In group table, the UE of first space division groupG1_1；Then following table gives space division UEG1_1Schedule information, it is specific as follows：
Upper table for chronomere, saves UE with ms (millisecond)G1_1One section of continuous scheduling time in each scheduling instance
Information, including but not limited to and each scheduling instance be associated UEG1_1Correlation information, SINR, CQI, BLER and
BSR information.Time range subscript x1, x2 ... ... xn, continuously have recorded n UEG1_1The information of scheduling, x1, x2 ... ... xn, and
Frame number, the subframe numbers of system call are corresponded, and n size is set to meet that new biography and retransfer scheduling time span are defined, root
According to current descending, ascending HARQ sequential and maximum retransmission, n reference arranges value can be 20.
Step S250, according to one or more space division set of terminal and the wherein schedule information of terminal, calculate this scheduling
Space division fluxion initial value.In the present embodiment, according to space division UE groups table and space division UE schedule information tables, determine space division UE groups and
The scheduling parameter of each space division UE groups, forms space division UE group scheduling parameter lists.It is by the processing knot of preceding step in the present embodiment
Fruit " space division UE groups table ", the input as this stage；And the result " space division UE schedule informations table " by preceding step, make
For the input in this stage；According to space division UE groups table and space division UE information tables, this space division UE group number m dispatched is determined, and often
The UE numbers n of individual space division group.By m and n, to determine space division fluxion initial value.X represents all in m space division group
Space division UE number summation.The space division fluxion initial value M=min { X, x } of this scheduling.X represents the maximum space division stream that system is supported
Number, after system design determination, the value determines that.In the present embodiment, according to fixed space division UE group informations, carry out
Empty Individual pretreatment, obtain space division fluxion initial value M.Processing method can be believed according to ability, the space division UE information group of system space division
Breath, determine that this scheduling can be with the number of the stream of space division and space division UE.
Step S260, according to space division fluxion initial value, influenceed caused by estimation inter-stream interference.In the present embodiment, according to sky
Porthole bridge initial value M, the influence that estimation inter-stream interference can be brought to data receiver.Gather { UE for the UE for participating in space division1,
UE2... UEM, to UEiData-signal, in UEjAppear to interference signal.Inter-stream interference can raise interchannel noise.No
The interference effect of cocurrent flow, it can be obtained by channel simulator.
Following table is the gain reduction value table of inter-stream interference.Illustrate the gain in the case of different space division stream, brought
Decay.
| Fluxion | Gain reduction (dB) |
| 2 | -3 |
| 3 | Δ2 |
| 4 | Δ3 |
| … | |
| x | Δx |
In following CQI space division compensating gain tables, CijRepresent UEmAnd UEnBetween carry out space division when, work as UEm's
CQI value is i, UEnSpace division gain compensation value of CQI value when being j.Work as UEmAnd UEnCQI value assembly drop following table space bit
When putting, now it is not recommended that UEmAnd UEnCarry out space division because now space division by force, high-order CQI UE transmission rate decline compared with
Greatly, transmission efficiency can be reduced on the contrary.
Step S270, according to estimation result, calculate the scheduling parameter of multiple space division set of terminal.In the present embodiment, according to
The influence estimation of inter-stream interference, it is determined that the scheduling parameter of each space division UE groups.The MCS of space division group determination is according to following formula
2 are handled.
MCSGn=MCSAMC+ΔM+Cij+BFGain(formula 2)
MCSGnRepresent the MCS of the scheduling of the Gn space division group, MCSAMCRepresent AMC (AdaptiveModulation and
Coding, Adaptive Modulation and Coding) the obtained MCS of process, ΔMBetween the stream that the gain reduction value table that inter-stream interference is looked into expression obtains
The gain reduction (subscript M represents space division fluxion) of interference, CijRepresent to look into the CQI space divisions compensation that CQI space division compensating gain tables obtain
Gain, BFGainRepresent antenna gain.
By the processing of the present embodiment, having primarily determined that can be with the UE groups UE of space divisionG1、UEG2、……UEGM, while also just
Step determines the MCS of each space division UE group schedulingsG1、MCSG2、……MCSGM, it is determined that space division UE group scheduling parameter lists.In this reality
Apply in example, for space division UE, SDMA multiple stream transmissions are carried out on same frequency, same running time-frequency resource, can bring serious
Inter-stream interference.Under conditions of space division, in order to reduce the influence of inter-stream interference, ensure Traffic Channel analysis feature, can adopt
A kind of method is according to CQI, SINR, and MCS (Modulation and Coding Scheme, modulation coding mode) is entered
Row depression of order so that the parsing precision of Traffic Channel is maintained in appropriate scope.
Step S280, according to the running time-frequency resource of space division and the scheduling parameter of one or more space division set of terminal, calculate real
Border is used for the space division set of terminal of dispatching space division and is wherein actually used in the terminal quantity of dispatching space division, selects corresponding terminal and divides
With running time-frequency resource to be scheduled.In the present embodiment, the space division UE group scheduling parameter lists being previously obtained are obtained；And obtain frequency
Divide UE schedule informations and available running time-frequency resource；According to space division UE group schedulings parameter, frequency division UE schedule informations, available time-frequency money
Source and power back-off, it is unified that processing is scheduled to space division, frequency division UE.It is determined that can actually carry out the UE groups of dispatching space division,
Frequency division UE.After the processing of the present embodiment, for MCSGnLess than MCSthresholdSpace division UE groups, it is preferred to use frequency division dispatch,
Avoid by force space division cause the too poor situation of data receiver result.MCSthresholdThresholding is the minimum MCS for being currently available for space division
Thresholding, the space division UE groups less than the thresholding are not suitable for dispatching space division.MCSthresholdAccording to the current space division group UE's for participating in scheduling
Channel circumstance, enter Mobile state adjustment, and implement to dispatch.
In the present embodiment, it is as follows to said process overview：Determine total running time-frequency resource that this scheduling can use, bag
Include the running time-frequency resource of space division and the running time-frequency resource of frequency division；According to space division, the UE information of frequency division, running time-frequency resource is distributed；Meanwhile according to
Space division UE group informations and space division UE schedule informations, with reference to power back-off, it is determined that the available scheduling parameter of each space division group, including but
It is not limited to MCS.In processing procedure, if being also not enough to overcome inter-stream interference to receptivity after the parameter adjustment such as MCS
Influence, it is necessary to reduce the stream number of space division, or even be reduced to not space division；Record this scheduling UE schedule information, including but
It is not limited to UE space division information, schedule information；It is scheduled.
Further, comprising the terminal for carrying out retransmission operation in multiple terminals of the present embodiment, and the number retransmitted is less than
Predetermined threshold value.In the present embodiment, if the TB (Transport Block, transmission block) transmitted for use space division mode, connects
Receiving end is not successfully received and needs to transmit again, can still use space division transmission means, lift cell transmission as far as possible
Spectrum efficiency.If some UE TB, continuously transmitted using n times space division mode, still unsuccessfully when, it is proposed that by the transmission side of the UE
Formula return back to frequency division scheduling, and the value suggestion of times N is not less than 2.For retransmitting, the present embodiment gives following description：
For retransmitting, the downlink data transmission and transmitting uplink data of adaptive retransmission, the dispatching space division with new biography is retransmitted
Processing mode is consistent；Non-self-adapting retransmits transmitting uplink data, because the TB (Transport Block, transmission block) retransmitted
Size is consistent with the TB block sizes needs of new biography, therefore, the transmitting uplink data retransmitted for non-self-adapting, can use as follows
Three kinds of modes：
(1) either single UE or multiple UE need to retransmit, and are retransmitted using frequency division scheduling mode, at simplification
Reason；
(2) if necessary to the multiple UE retransmitted, the new biography moment of this re-transmission is corresponded to, belongs to same space division group just,
And retransmit UE this re-transmission, judged by space division, space division group selection selection, inter-stream interference, power back-off and scheduling parameter
After configuration, space division is still adapted to, then multiple UE that this needs retransmits, can carry out space division re-transmission；
(3) if necessary to the multiple UE retransmitted, the new biography moment of this re-transmission is corresponded to, is not belonging to same space division group, and
And scheduling parameter during new biography scheduling, including MCS, RB resource etc. differ greatly, recommend to dispatch using frequency division；Sky can also be used
Scheduling is divided to judge, using the dispatching space division mode done one's best, if dispatching space division just can be used with dispatching space division；Otherwise, adopt
Dispatched with frequency division.
As shown in figure 3, a kind of running time-frequency resource dispatching space division device is provided in one embodiment of the present of invention, including：
Channel relevancy module 310, calculate the channel relevancy of multiple terminals.In the present embodiment, handle between different UE
Channel relevancy, including between different UE channel relevancy reception.For TDD (Time Division Duplexing,
Time-division) system, can be by detecting the pilot tone of different terminals transmission come the channel relevancy between computing terminal；For FDD
(Frequency Division Duplex, frequency division) system, (Reference Signal, lead terminal detection down channel RS
Frequently signal), channel information, and the channel information that will be got is calculated, for the channel information reported according to UE, carries out
The calculating of channel relevancy.
Channel relevancy is smooth between UE：Time variation based on wireless channel under large scale fading channel environment and unstable
Property, the channel relevancy received is needed to carry out the disposal of gentle filter.
Represent the relevance values that will be obtained after current filter；
Represent the relevance values that last time filtering obtains afterwards；
Corrn：Represent currently available correlation instantaneous value；
α：Represent filter factor, span [0,1].1 represents not filter.It can be adjusted, write from memory according to channel circumstance dynamic
1/16 can be taken by recognizing value.
Schedule information module 320, obtain the schedule information of multiple terminals.In the present embodiment, the schedule information bag of terminal
Include but be not limited to BLER, CQI, SINR, BSR etc..
Space division set of terminal module 330, will be more according to the channel relevancy of multiple terminals and the schedule information of multiple terminals
Individual terminal is divided into one or more space division set of terminal.In the present embodiment, the channel relevancy between different space division set of terminal compared with
It is low；In the present embodiment, according to the channel relevancy between different UE, the UE information for participating in scheduling, UE to be dispatched in scheduling
The information such as BSR/SINR/CQI, it is determined that can be with the UE of space division and by the space division UE of screening according to UE BSR/SINR/CQI etc.
Parameter is grouped.In the present embodiment, because obtained space division UE groups are divided according to channel relevancy, believe between each other
Road correlation is relatively low, so being adapted for dispatching space division.
Scheduling parameter module 340, according to one or more space division set of terminal and the wherein schedule information of terminal, calculate this
The scheduling parameter of multiple space division set of terminal in secondary scheduling.In the present embodiment, scheduling parameter includes but is not limited to MCS.
Scheduler module 350, according to the running time-frequency resource of space division and the scheduling parameter of one or more space division set of terminal, calculate
It is actually used in the space division set of terminal of dispatching space division and is wherein actually used in the terminal quantity of dispatching space division, selects corresponding terminal simultaneously
Running time-frequency resource is distributed to be scheduled.
A kind of running time-frequency resource dispatching space division device is provided in one embodiment of invention, including：
Channel relevancy mould 310, calculate the channel relevancy of multiple terminals.In the present embodiment, calculate and safeguard difference
UE channel correlation value.Preferably, further to real-time channel correlation value can be handled, to avoid relevance values
Shake excessive.
Space division set of terminal module 320, according to the channel relevancy and channel priority of multiple terminals, divided from multiple terminals
Go out the optional terminal set of space division.In the present embodiment, the correlation according to UE between any two, the optional user's collection of space division is safeguarded
Sselect, specifically include：
Collect S from activation useracitveThe optional user of middle determination space division collects Sselect.M use is shared in user's set if activating
Family.During initialization, the optional user of space division is made to collect Sselect={ s1 }, s1 can be from SacitveThe middle use according to selection highest priority
Family.After starting scheduling, the user of the suitable space division in addition to S1 is concentrated from activation, is added to SselecIn t；Do not exist simultaneously
SacitveIn user, it is necessary to from SselectDelete；In scheduling, by SacitveAnd SselectUE in set is grading according to dispatching priority
Row sequence；UE1, UE2..., UEn(n≤m), carried out from the sequence according to order from high to low；Traversal processing.According to elder generation
I is traveled through, the rear order for traveling through j, handles COR successivelyI, j(1≤i ＜ n, 1 ＜ j≤n), CORI, jRepresent the letter between UEi and UEj
Road correlation.If CORI, j＜ ThrCOR, then it represents that UEi and UEj channel is unrelated.ThrCORJudge door for channel relevancy
Limit, it can be obtained from emulation or outfield actual verification.After i and j traversals are completed, the optional user's set of new space division is obtained
UE1′, UE2′..., UEn′(n '≤m), putting in order for UE in the set is scheduling according to UE channel relevancy and UE
Priority sorts, by channel relevancy is minimum, dispatching priority highest user comes foremost.
Schedule information module 330, obtain the schedule information of multiple terminals.Specifically, can include：
SINR modules 331, main function are the SINR values for handling UE, including receive real-time SINR value and to real-time
SINR carries out the disposal of gentle filter, filtering algorithm reference formula 1.Filter coefficient alpha can obtain according to emulation and actual test；
CQI modules 332, main function are to handle the CQI values that report of UE, including receive real-time CQI value and to real-time
CQI value carries out the disposal of gentle filter, filtering algorithm reference formula 1.
BLER modules 333, main function are the BLER values for handling UE, including real-time BLER values and to real-time BLER values
Carry out the disposal of gentle filter, filtering algorithm reference formula 1.
BSR modules 334, main function are to receive and safeguard UE BSR values.In addition to BSR modules, remaining module, give
What space division set of terminal module provided is all the value after smothing filtering.BSR modules provide the real-time BSR without filtering
Value, it is specific as shown in Figure 4.
Space division set of terminal module 320, to the terminal in the optional terminal set of space division, according to corresponding schedule information partitioning
For one or more space division set of terminal.Based on foregoing teachings, in the present embodiment, gathered according to the current optional user of space division
SSelect=[UE1′, UE2′..., UEn′Each UE SINR value, CQI value, BSR values and the MCS initial values of scheduling in (n '≤m), really
Surely space division UE packet is carried out.Specifically include：
According to the channel relevancy and channel priority of multiple terminals, the terminal in the optional terminal set of space division is sorted；
Terminal is obtained according to the sequence of terminal in the optional terminal set of space division, and it is related to the channel of other-end according to acquired terminal
Property, schedule information, division includes the space division set of terminal where acquired terminal.In this embodiment, it is preferred that can be with scheduling
UE is ranked up by the channel priority for considering correlation coefficient value and UE, and it is above that correlation is low and channel is excellent to come
The high UE of first level.Then according to UE sequence lists, according to UE order, with reference to UE BSR, SINR and CQI, space division UE is carried out
Packet.The purpose of packet be in UE sequence lists, meet channel relevancy be less than dynamic threshold in the case of, as far as possible by BSR,
UE similar in SINR and CQI points in same space division group.The result of packet space division UE groups table and space division UE schedule information tables
Form safeguarded.
A kind of example of space division result is the following described, space division UE groups are stored in space division UE group tables；Assuming that space division
In group table, the UE of first space division groupG1_1；Then following table gives space division UEG1_1Schedule information, it is specific as follows：
Upper table for chronomere, saves UE with ms (millisecond)G1_1One section of continuous scheduling time in each scheduling instance
Information, including but not limited to and each scheduling instance be associated UEG1_1Correlation information, SINR, CQI, BLER and
BSR information.Time range subscript x1, x2 ... ... xn, continuously have recorded n UEG1_1The information of scheduling, x1, x2 ... ... xn, and
Frame number, the subframe numbers of system call are corresponded, and n size is set to meet that new biography and retransfer scheduling time span are defined, root
According to current descending, ascending HARQ sequential and maximum retransmission, n reference arranges value can be 20.
Scheduling parameter module 340, according to one or more space division set of terminal and the wherein schedule information of terminal, calculate this
The space division fluxion initial value of secondary scheduling.In the present embodiment, according to space division UE groups table and space division UE schedule information tables, space division UE is determined
The scheduling parameter of group and each space division UE groups, space division UE group scheduling parameter lists are formed, it is specific as shown in Figure 5.In the present embodiment,
It is the input as this stage by the result " space division UE groups table " of preceding step；And the result by preceding step
" space division UE schedule informations table ", the input as this stage；According to space division UE groups table and space division UE information tables, this scheduling is determined
Space division UE group number m, and the UE numbers n of each space division group.By m and n, to determine space division fluxion initial value.X tables
Show the number summation of all space division UE in m space division group.The space division fluxion initial value M=min { X, x } of this scheduling.X represents system
The maximum space division fluxion that system is supported, after system design determination, the value determines that.In the present embodiment, according to having determined that
Space division UE group informations, carry out empty Individual pretreatment, obtain space division fluxion initial value M.Processing method can be according to system space division
Ability, space division UE information group informations, determine that this scheduling can be with the number of the stream of space division and space division UE.
Scheduling parameter module 340, according to space division fluxion initial value, influenceed caused by estimation inter-stream interference.In the present embodiment,
According to space division fluxion initial value M, the influence that inter-stream interference can be brought to data receiver is estimated.Gather for the UE for participating in space division
{UE1, UE2... UEM, to UEiData-signal, in UEjAppear to interference signal.Inter-stream interference can raise channel and make an uproar
Sound.The not interference effect of cocurrent flow, it can be obtained by channel simulator.
Following table is the gain reduction value table of inter-stream interference.Illustrate the gain in the case of different space division stream, brought
Decay.
| Fluxion | Gain reduction (dB) |
| 2 | -3 |
| 3 | Δ2 |
| 4 | Δ3 |
| … | |
| x | Δx |
In following CQI space division compensating gain tables, CijRepresent UEmAnd UEnBetween carry out space division when, work as UEm's
CQI value is i, UEnSpace division gain compensation value of CQI value when being j.Work as UEmAnd UEnCQI value assembly drop following table space bit
When putting, now it is not recommended that UEmAnd UEnCarry out space division because now space division by force, high-order CQI UE transmission rate decline compared with
Greatly, transmission efficiency can be reduced on the contrary.
Scheduling parameter module 340, according to estimation result, calculate the scheduling parameter of multiple space division set of terminal.In the present embodiment
In, estimated according to the influence of inter-stream interference, it is determined that the scheduling parameter of each space division UE groups.The MCS of space division group determination is under
The formula 2 in face is handled.
MCSGn=MCSAMC+ΔM+Cij+BFGain(formula 2)
MCSGnRepresent the MCS of the scheduling of the Gn space division group, MCSAMCRepresent AMC (AdaptiveModulation and
Coding, Adaptive Modulation and Coding) the obtained MCS of process, ΔMBetween the stream that the gain reduction value table that inter-stream interference is looked into expression obtains
The gain reduction (subscript M represents space division fluxion) of interference, CijRepresent to look into the CQI space divisions compensation that CQI space division compensating gain tables obtain
Gain, BFGainRepresent antenna gain.
By the processing of the present embodiment, having primarily determined that can be with the UE groups UE of space divisionG1、UEG2、……UEGM, while also just
Step determines the MCS of each space division UE group schedulingsG1、MCSG2、……MCSGM, it is determined that space division UE group scheduling parameter lists.In this reality
Apply in example, for space division UE, SDMA multiple stream transmissions are carried out on same frequency, same running time-frequency resource, can bring serious
Inter-stream interference.Under conditions of space division, in order to reduce the influence of inter-stream interference, ensure Traffic Channel analysis feature, can adopt
A kind of method is according to CQI, SINR, and MCS (Modulation and Coding Scheme, modulation coding mode) is entered
Row depression of order so that the parsing precision of Traffic Channel is maintained in appropriate scope.
Scheduler module 350, according to the running time-frequency resource of space division and the scheduling parameter of one or more space division set of terminal, calculate
It is actually used in the space division set of terminal of dispatching space division and is wherein actually used in the terminal quantity of dispatching space division, selects corresponding terminal simultaneously
Running time-frequency resource is distributed to be scheduled.In the present embodiment, the space division UE group scheduling parameter lists being previously obtained are obtained；And obtain
Frequency division UE schedule informations and available running time-frequency resource；According to space division UE groups parameter information, frequency division UE schedule informations, available time-frequency
Resource and power back-off, it is unified that processing is scheduled to space division, frequency division UE.It is determined that it can actually carry out the UE of dispatching space division
Group, frequency division UE.After the processing of the present embodiment, for MCSGnLess than MCSthresholdSpace division UE groups, it is preferred to use frequency division adjust
Degree, avoid by force space division cause the too poor situation of data receiver result.MCSthresholdThresholding is be currently available for space division minimum
MCS thresholdings, the space division UE groups less than the thresholding are not suitable for dispatching space division.MCSthresholdAccording to the current space division group for participating in scheduling
UE channel circumstance, enter Mobile state adjustment, and implement to dispatch.
In the present embodiment, it is as follows to said process overview：Determine total running time-frequency resource that this scheduling can use, bag
Include the running time-frequency resource of space division and the running time-frequency resource of frequency division；According to space division, the UE information of frequency division, running time-frequency resource is distributed；Meanwhile according to
Space division UE group informations and space division UE schedule informations, with reference to power back-off, it is determined that the available scheduling parameter of each space division group, including but
It is not limited to MCS.In processing procedure, if being also not enough to overcome inter-stream interference to receptivity after the parameter adjustment such as MCS
Influence, it is necessary to reduce the stream number of space division, or even be reduced to not space division；Record this scheduling UE schedule information, including but
It is not limited to UE space division information, schedule information；It is scheduled.
Further, comprising the terminal for carrying out retransmission operation in multiple terminals of the present embodiment, and the number retransmitted is less than
Predetermined threshold value.In the present embodiment, if the TB (Transport Block, transmission block) transmitted for use space division mode, connects
Receiving end is not successfully received and needs to transmit again, can still use space division transmission means, lift cell transmission as far as possible
Spectrum efficiency.If some UE TB, continuously transmitted using n times space division mode, still unsuccessfully when, it is proposed that by the transmission side of the UE
Formula return back to frequency division scheduling, and the value suggestion of times N is not less than 2.For retransmitting, the present embodiment gives following description：
For retransmitting, the downlink data transmission and transmitting uplink data of adaptive retransmission, the dispatching space division with new biography is retransmitted
Processing mode is consistent；Non-self-adapting retransmits transmitting uplink data, because the TB (Transport Block, transmission block) retransmitted
Size is consistent with the TB block sizes needs of new biography, therefore, the transmitting uplink data retransmitted for non-self-adapting, can use as follows
Three kinds of modes：
(1) either single UE or multiple UE need to retransmit, and are retransmitted using frequency division scheduling mode, at simplification
Reason；
(2) if necessary to the multiple UE retransmitted, the new biography moment of this re-transmission is corresponded to, belongs to same space division group just,
And retransmit UE this re-transmission, judged by space division, space division group selection selection, inter-stream interference, power back-off and scheduling parameter
After configuration, space division is still adapted to, then multiple UE that this needs retransmits, can carry out space division re-transmission；
(3) if necessary to the multiple UE retransmitted, the new biography moment of this re-transmission is corresponded to, is not belonging to same space division group, and
And scheduling parameter during new biography scheduling, including MCS, RB resource etc. differ greatly, recommend to dispatch using frequency division；Sky can also be used
Scheduling is divided to judge, using the dispatching space division mode done one's best, if dispatching space division just can be used with dispatching space division；Otherwise, adopt
Dispatched with frequency division.
Above by reference to the preferred embodiments of the present invention have been illustrated, not thereby limit to the interest field of the present invention.This
Art personnel do not depart from the scope of the present invention and essence, can have a variety of flexible programs to realize the present invention, for example as one
The feature of individual embodiment can be used for another embodiment and obtain another embodiment.All institutes within the technical concept with the present invention
The all any modification, equivalent and improvement of work, all should be within the interest field of the present invention.
Claims (10)
- A kind of 1. running time-frequency resource dispatching space division method, it is characterised in that including：Calculate the channel relevancy of multiple terminals；Obtain the schedule information of the multiple terminal；According to the channel relevancy of the multiple terminal and the schedule information of the multiple terminal, the multiple terminal is divided into One or more space division set of terminal；According to one or more of space division set of terminal and the wherein schedule information of terminal, calculate multiple described in this scheduling The scheduling parameter of space division set of terminal；According to the running time-frequency resource of space division and the scheduling parameter of one or more of space division set of terminal, calculating is actually used in space division The space division set of terminal of scheduling and the terminal quantity for being wherein actually used in dispatching space division, select corresponding terminal and distribute running time-frequency resource To be scheduled.
- 2. according to the method for claim 1, it is characterised in that according to the multiple space division set of terminal and wherein terminal Schedule information, the scheduling parameter of one or more space division set of terminal described in this scheduling is calculated, is specifically included：According to one or more of space division set of terminal and the wherein schedule information of terminal, the space division fluxion of this scheduling is calculated Initial value；According to the space division fluxion initial value, influenceed caused by estimation inter-stream interference；According to estimation result, the scheduling parameter of the multiple space division set of terminal is calculated.
- 3. according to the method for claim 1, it is characterised in that according to the channel relevancy of the multiple terminal and described The schedule information of multiple terminals, the multiple terminal is divided into one or more space division set of terminal, specifically included：According to the channel relevancy and channel priority of the multiple terminal, the optional terminal of space division is marked off from the multiple terminal Set；It is one or more of skies according to corresponding schedule information partitioning to the terminal in the optional terminal set of the space division Divide set of terminal.
- 4. according to the method for claim 3, it is characterised in that to the terminal in the optional terminal set of the space division, according to Corresponding schedule information partitioning is one or more of space division set of terminal, is specifically included：According to the channel relevancy and channel priority of the multiple terminal, the terminal in the optional terminal set of the space division is arranged Sequence；Terminal is obtained according to the sequence of terminal in the optional terminal set of the space division, and according to acquired terminal and other-end Channel relevancy, schedule information, division include the space division set of terminal where acquired terminal.
- 5. method according to any one of claim 1 to 4, it is characterised in thatComprising the terminal for carrying out retransmission operation in the multiple terminal, and the number retransmitted is less than predetermined threshold value.
- A kind of 6. running time-frequency resource dispatching space division device, it is characterised in that including：Channel relevancy module, for calculating the channel relevancy of multiple terminals；Schedule information module, for obtaining the schedule information of the multiple terminal；Space division set of terminal module, the scheduling for the channel relevancy according to the multiple terminal and the multiple terminal are believed Breath, is divided into one or more space division set of terminal by the multiple terminal；Scheduling parameter module, for according to one or more of space division set of terminal and the wherein schedule information of terminal, calculating The scheduling parameter of multiple space division set of terminal described in this scheduling；Scheduler module, for the running time-frequency resource according to space division and the scheduling parameter of one or more of space division set of terminal, meter Calculation is actually used in the space division set of terminal of dispatching space division and is wherein actually used in the terminal quantity of dispatching space division, selects corresponding terminal And running time-frequency resource is distributed to be scheduled.
- 7. device according to claim 6, it is characterised in thatThe scheduling parameter module calculates this according to one or more of space division set of terminal and the wherein schedule information of terminal The space division fluxion initial value of secondary scheduling, and according to the space division fluxion initial value, influence caused by estimation inter-stream interference, and according to Estimation result, calculate the scheduling parameter of the multiple space division set of terminal.
- 8. device according to claim 6, it is characterised in thatThe space division set of terminal module is according to the channel relevancy and channel priority of the multiple terminal, from the multiple terminal The optional terminal set of space division is marked off, and to the terminal in the optional terminal set of the space division, according to corresponding schedule information Partitioning is one or more of space division set of terminal.
- 9. device according to claim 8, it is characterised in thatThe space division set of terminal module is optional to the space division according to the channel relevancy and channel priority of the multiple terminal Terminal sequence in terminal set, and the sequence acquisition terminal according to terminal in the optional terminal set of the space division, and according to The channel relevancy of acquired terminal and other-end, schedule information, division include the space division set of terminal where acquired terminal.
- 10. the device according to any one of claim 6 to 9, it is characterised in thatComprising the terminal for carrying out retransmission operation in the multiple terminal, and the number retransmitted is less than predetermined threshold value.
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| WO2018050059A1 (en) | 2018-03-22 |
| CN107846266B (en) | 2022-03-04 |
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