CN104185206A - Transmission mode switching method and device - Google Patents

Transmission mode switching method and device Download PDF

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Publication number
CN104185206A
CN104185206A CN201310196213.1A CN201310196213A CN104185206A CN 104185206 A CN104185206 A CN 104185206A CN 201310196213 A CN201310196213 A CN 201310196213A CN 104185206 A CN104185206 A CN 104185206A
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transmission mode
scheduling
weighting function
expression formula
value
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CN104185206B (en
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姚春峰
付瑞颖
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ZTE Corp
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ZTE Corp
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Priority to JP2016513203A priority patent/JP6073026B2/en
Priority to PCT/CN2013/090928 priority patent/WO2014187140A1/en
Priority to RU2015148748A priority patent/RU2615998C1/en
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a transmission mode switching method. The method comprises steps: a weighting function expression used for transmission mode switching is determined; according to measuring information at a base station side and reporting information and scheduling information at the terminal side, the value of each variable in the weighting function expression in each transmission mode is estimated; the value of the weighting function expression in each transmission mode is calculated, and transmission modes corresponding to the maximal value or the minimal value in the values of the weighting function expression are determined to be transmission modes capable of being switched, and transmission mode switching is carried out. The invention also discloses a transmission mode switching device. by adopting the method and the device of the invention, accurate switching and the throughout of the system can be improved.

Description

A kind of changing method of transmission mode and device
Technical field
The present invention relates to, in Long Term Evolution (Long Term Evolution, LTE) system, relate in particular to a kind of changing method and device of transmission mode.
Background technology
In order to mate different application scenarioss, multiple transmission mode coexists among LTE system, and how according to the feature of application scenarios, the transmission mode of adaptive selection optimum becomes the key that improves systematic function.In prior art, generally adopt the information such as speed, channel relevancy, signal to noise ratio, spectrum efficiency to carry out the switching of transmission mode, and obtaining of these information estimated or the mode such as terminal to report realizes conventionally by base station side.
Wherein, the mode of estimating for base station side, existing problem is that some information are inestimable in base station side, for example: for beam shaping (Beamforming, BF) technology, agreement regulation adopts client DRS (Dedicated Reference Signal) (UE-Specific Reference Signals, UE-SRS) to carry out channel estimating; And for transmit diversity (Space Frequency Block Code, SFBC) technology, agreement regulation adopts cell specific reference signal (Cell-specific Reference Signals, CRS) carry out channel estimating, due to difference and the possible difference of terminal channel method of estimation of pilot configuration, therefore, systematic function difference is that base station side cannot accurately be estimated, and then will affect the accuracy of switching.
For the mode of terminal to report, existing problem is: first, some information protocols are not supported to report; Secondly, in the time that the information of terminal to report is inaccurate, not only can affect the accuracy of switching, also can cause the decline of systematic function.
Summary of the invention
In view of this, changing method and device that main purpose of the present invention is to provide a kind of transmission mode, can accurately switch, and can improve the throughput of system.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of changing method of transmission mode, described method comprises: be identified for the weighting function expression formula that transmission mode is switched; According to the reporting information of the metrical information of base station side and end side and schedule information, estimate under each transmission mode the value of each variable in described weighting function expression formula; Calculate the value of described weighting function expression formula under described each transmission mode; Determine in the value of described weighting function expression formula that maximum or transmission mode corresponding to minimum value are switchable transmission mode, and carry out transmission mode switching.
In such scheme, the value of the weighting function expression formula under the described each transmission mode of described calculating, comprising: according to the value of each variable in described weighting function expression formula under each transmission mode of estimating, divide transmission mode set; The transmission mode set T that divided needs are attempted 3in a scheduling window, attempt scheduling according to scheduling pattern, obtain the value of each variable in weighting function expression formula; Calculate the transmission mode set T that obtains transmission mode and switch required full detail dividing 2in the value of weighting function expression formula under various transmission modes; And calculate described transmission mode set T according to the value of each variable in the described weighting function expression formula of obtaining 3in the value of weighting function expression formula of various transmission modes.
In such scheme, described scheduling pattern comprises: scheduling pattern one: in order or backward successively to described transmission mode set T 3interior each transmission mode is carried out round-robin scheduling; Scheduling pattern two: in order or backward successively to described transmission mode set T 3in each transmission mode carry out round-robin scheduling, and each transmission mode is every take turns in continuously the number of times of scheduling be greater than once; Scheduling pattern three: odd number wheel in order or backward successively to described transmission mode set T 3interior each transmission mode is dispatched, and even number wheel is by backward or sequentially successively to described transmission mode set T 3interior each transmission mode is dispatched; Scheduling pattern four: odd number wheel in order or backward to described transmission mode set T 3interior each transmission mode is dispatched, and even number wheel is by backward or sequentially to described transmission mode set T 3in each transmission mode dispatch, and each transmission mode is every take turns in continuously the number of times of scheduling be greater than once.
In such scheme, the each variable in described weighting function expression formula comprises spectrum efficiency, Block Error Rate, packet loss and the interference that adjacent area is produced.
In such scheme, the metrical information of described base station side comprises: channel estimating information and channel measurement information; The reporting information of described end side comprises: channel quality instruction, pre-coding matrix instruction and order instruction; The schedule information of described end side comprises: the transmission mode of the modulation of scheduling times, scheduling and encoding scheme and scheduling.
In such scheme, described method also comprises: in the value of described weighting function expression formula, transmission mode corresponding to maximum or minimum value has when multiple, determines switchable transmission mode according to random selection or permanent order.
The present invention also provides a kind of switching device shifter of transmission mode, and described device comprises determining unit, estimation unit, the first computing unit and switch unit, wherein, and described determining unit, the weighting function expression formula of switching for being identified for transmission mode; Described estimation unit, for according to the reporting information of the metrical information of base station side and end side and schedule information, estimates under each transmission mode the value of each variable in described weighting function expression formula; Described the first computing unit, for calculating the value of described weighting function expression formula under described each transmission mode; Described switch unit, is switchable transmission mode for value maximum or transmission mode corresponding to minimum value of determining described weighting function expression formula, and carries out transmission mode switching.
In such scheme, described the first computing unit comprises division unit, scheduling unit and the second computing unit, and wherein, described division unit, for according to the value of the each variable of described weighting function expression formula under each transmission mode of estimating, divides transmission mode set; Described scheduling unit, the transmission mode set T attempting for the needs to divided 3in a scheduling window, attempt scheduling according to scheduling pattern, obtain the value of each variable in weighting function expression formula; Described the second computing unit, for calculating the divided transmission mode set T that obtains transmission mode and switch required full detail 2in the value of weighting function expression formula under various transmission modes; And calculate described transmission mode set T according to the value of each variable in the described weighting function expression formula of obtaining 3in the value of weighting function expression formula of various transmission modes.
In such scheme, described scheduling pattern comprises: scheduling pattern one: in order or backward successively to described transmission mode set T 3interior each transmission mode is carried out round-robin scheduling; Scheduling pattern two: in order or backward successively to described transmission mode set T 3in each transmission mode carry out round-robin scheduling, and each transmission mode is every take turns in continuously the number of times of scheduling be greater than once; Scheduling pattern three: odd number wheel in order or backward successively to described transmission mode set T 3interior each transmission mode is dispatched, and even number wheel is by backward or sequentially successively to described transmission mode set T 3interior each transmission mode is dispatched; Scheduling pattern four: odd number wheel in order or backward to described transmission mode set T 3interior each transmission mode is dispatched, and even number wheel is by backward or sequentially to described transmission mode set T 3in each transmission mode dispatch, and each transmission mode is every take turns in continuously the number of times of scheduling be greater than once.
In such scheme, the each variable in described weighting function expression formula comprises spectrum efficiency, Block Error Rate, packet loss and the interference that adjacent area is produced.
In such scheme, the metrical information of described base station side comprises: channel estimating information and channel measurement information; The reporting information of described end side comprises: channel quality instruction, pre-coding matrix instruction and order instruction; The schedule information of described end side comprises: the transmission mode of the modulation of scheduling times, scheduling and encoding scheme and scheduling.
In such scheme, described device also comprises selected cell; Described selected cell, has when multiple for the value maximum of described weighting function expression formula or transmission mode corresponding to minimum value, determines switchable transmission mode according to random selection or permanent order.
The changing method of transmission mode provided by the invention and device, be first identified for the weighting function expression formula that transmission mode is switched; Again according to the reporting information of the metrical information of base station side and end side and schedule information, estimate under each transmission mode the value of each variable in described weighting function expression formula; Calculate afterwards the value of described weighting function expression formula under described each transmission mode, determine in the value of described weighting function expression formula that maximum or transmission mode corresponding to minimum value are switchable transmission mode, and carry out transmission mode switching; In the process of value of calculating weighting function expression formula, the present invention can be by the mode of dividing transmission mode set and attempting scheduling, obtain the relevant information under various transmission modes, and then based on obtain information determine switchable transmission mode and carry out the switching of transmission mode, so, it is more accurate to make to switch, and can effectively improve throughput of system.
Brief description of the drawings
Fig. 1 is the realization flow schematic diagram of the changing method of transmission mode of the present invention;
Fig. 2 is the specific implementation schematic flow sheet of step 103 in Fig. 1;
Fig. 3 is the composition structural representation of the switching device shifter of transmission mode of the present invention;
Fig. 4 is the composition structural representation of the first computing unit in Fig. 3.
Embodiment
Basic thought of the present invention is: be identified for the weighting function expression formula that transmission mode is switched, under each transmission mode, determine that the corresponding transmission mode of weighting function maximum or minimum value is switchable transmission mode and carries out transmission mode switching.
Wherein, the information of the described weighting function expression formula that is identified for transmission mode switching comprises spectrum efficiency (Spectrum Effectiveness, SE), Block Error Rate (Block Error Ratio, BLER), packet loss (Harq Fail Rate, HFR), interference (NI) etc. that adjacent area is produced; Described definite weighting function maximum or the corresponding transmission mode of minimum value are switchable transmission mode and carry out transmission mode switching and completed by base station.
Below in conjunction with the drawings and specific embodiments, the technical solution of the present invention is further elaborated.
Fig. 1 is the realization flow schematic diagram of the changing method of transmission mode of the present invention, and as shown in Figure 1, the idiographic flow of changing method is as follows:
Step 101: be identified for the weighting function expression formula that transmission mode is switched;
Here, the described weighting function switching for transmission mode is designated as f (SE, BLER, HFR, NI), and weighting function available expression (1) represents:
f(SE，BLER，HFR，NI)＝W 1*SE(1-BLER)+W 2*ε(HFR-TH 1)+W 3*NI (1)
Wherein, SE represents variable spectrum efficiency, and BLER represents variable Block Error Rate, and HFR represents variable packet loss, and NI represents the interference that variable produces adjacent area, and TH1 represents the upper limit of system tolerant packet loss, W 1, W 2, W 3be respectively the weight coefficient of variable spectrum efficiency, the weight coefficient of variable packet loss and the weight coefficient that variable disturbs adjacent area, ε (t) represents step function, and its expression formula is ϵ ( t ) = 1 t > 0 0 t ≤ 0 , Wherein t represents stochastic variable.
About expression formula (1), those skilled in the art can determine according to characteristic and the experience etc. of system the expression formula of weighting function.In practical operation, can determine accordingly weighting function expression formula according to a certain parameter of system, for example: for the system that lays particular emphasis on spectrum efficiency, can be by the weight coefficient W of variable spectrum efficiency SE 1arrange to such an extent that be far longer than the weight coefficient of other parameter; And for the LTE system that maximizes criterion based on spectrum efficiency, can only retain the weight coefficient W of variable spectrum efficiency SE 1, and the weight coefficient of other parameters is set to 0; For isolated island community, owing to not needing to consider the interference to adjacent area, the weight coefficient W of the interference NI that therefore variable can be produced adjacent area 3be set to 0.
Step 102: according to the reporting information of the metrical information of base station side and end side and schedule information, estimate under each transmission mode the value of each variable in described weighting function expression formula;
Here, the metrical information of described base station side comprises channel estimating information, channel measurement information etc., the reporting information of end side comprises channel quality instruction (Channel Quality Indicator, CQI), pre-coding matrix instruction (Precoding Matrix Indication, and order instruction (Rank Indication PMI), RI) etc., the schedule information of end side comprises the transmission mode of the modulation of scheduling times, scheduling and encoding scheme (Modulation Coding Scheme, MCS), scheduling etc.
Concrete, the set that participates in each transmission mode of switching in system can be designated as to T, transmission mode set T can include but not limited to the transmission modes such as transmit diversity, single current beam shaping and dual-layer beam forming; The judgement moment of switching in transmission mode, base station is according to the reporting information of the metrical information of base station side and end side and schedule information, estimate under each transmission mode in weighting function expression formula the interference NI that variable spectrum efficiency SE, variable block error rate BLER, variable packet loss HFR and variable produce adjacent area.
Step 103: calculate the value of described weighting function expression formula under described each transmission mode, determine in the value of described weighting function expression formula that maximum or transmission mode corresponding to minimum value are switchable transmission mode, and carry out transmission mode switching.
Here, the value of the described weighting function expression formula under the each transmission mode of described calculating, is the upper limit TH of described system tolerant packet loss determining based on step 101 1with described weight coefficient W 1, W 2, W 3, and step 102 in weighting function expression formula, the value of each variable is carried out under each transmission mode of estimating, wherein, described weight coefficient W 1, W 2and W 3determine to a certain extent the value of described weighting function expression formula, corresponding, need to determine in the value of described weighting function expression formula that maximum or transmission mode corresponding to minimum value are switchable transmission mode, and carry out transmission mode switching.
Concrete, Fig. 2 is the specific implementation schematic flow sheet of step 103 in Fig. 1, as shown in Figure 2, step 103 comprises the following steps:
Step 201: according to the value of each variable in the weighting function expression formula of estimating, the transmission mode set T that participates in switching is divided into and can not becomes the transmission mode of changeable transmission mode set T 1, obtain transmission mode and switch the transmission mode set T of required full detail 2transmission mode set T with needs trial 3;
Wherein, the described transmission mode set T that can not become changeable transmission mode 1refer to that base station does not obtain transmission mode and switches required full detail, even and NO information choose theoretical optimal value; The value of the corresponding weighting function expression formula of this transmission mode can not become the set of the transmission mode of maximum or minimum value conventionally;
The described transmission mode set T that has obtained transmission mode and switch required full detail 2refer to the set that base station has obtained transmission mode and switches the transmission mode of required full detail;
The described transmission mode set T that needs trial 3refer to that base station does not obtain transmission mode and switches required full detail, but NO information is while choosing theoretical optimal value, the value of the corresponding weighting function expression formula of this transmission mode may become the transmission mode set of maximum or minimum value.
Here, step 201 is to estimate under each transmission mode the value of each variable in weighting function expression formula according to step 102, realizes the division to participating in the transmission mode set T switching.Because step 102 exists and cannot accurately estimate, is unable to estimate or reports inaccurate situation the value of some variable, thereby the value of these variablees can be thought unknownly, and then corresponding these variate-values transmission mode is divided into transmission mode set T 3in, therefore, the present invention is to transmission mode set T 3dispatch to obtain transmission mode set T by trial 3in the corresponding variate-value of each transmission mode so that the present invention can accurately switch, and can improve the throughput of system.
Wherein, described situation about cannot accurately estimate comprises: in the time that signal to noise ratio (SNR) is very low, the channel estimation methods of base station side and method of measurement lost efficacy; Described inestimable situation comprises: due to the pilot configuration difference of different transmission mode, for example, the pilot configuration of BF and the pilot configuration of SFBC are not equal, cause the inconsistent of both demodulation performances; Describedly report inaccurate situation to comprise to refer to end side RI, the PMI, the CQI information that report not to meet when ageing.
By transmission mode set T 1, T 2and T 3definition known, transmission mode set T 1in transmission mode can not become switchable transmission mode, switchable transmission mode can only be at transmission mode set T 2or T 3in.
Step 202: to described transmission mode set T 3in a scheduling window, attempt scheduling according to scheduling pattern, obtain the value of each variable in weighting function expression formula;
Here, described scheduling window is for describing continuous several times scheduling; Bring system loss owing to attempting scheduling meeting, therefore, the scope that the arranges expense setting that generally can allow according to system of scheduling window, is generally the 1%-10% of the switching cycle of transmission mode.Described scheduling pattern comprises:
Scheduling pattern one: in order or backward successively to described transmission mode set T 3interior each transmission mode is carried out round-robin scheduling;
Scheduling pattern two: in order or backward successively to described transmission mode set T 3in each transmission mode carry out round-robin scheduling, and each transmission mode is every take turns in continuously the number of times of scheduling be greater than once;
Scheduling pattern three: odd number wheel in order or backward successively to described transmission mode set T 3interior each transmission mode is dispatched, and even number wheel is by backward or sequentially successively to described transmission mode set T 3interior each transmission mode is dispatched;
Scheduling pattern four: odd number wheel in order or backward to described transmission mode set T 3interior each transmission mode is dispatched, and even number wheel is by backward or sequentially to described transmission mode set T 3in each transmission mode dispatch, and each transmission mode is every take turns in continuously the number of times of scheduling be greater than once.
Can be by transmission mode set T 3interior various transmission modes are designated as: T 3(1), T 3(2) ... T 3(n), corresponding, described scheduling pattern one, two, three and four comprises following scheduling pattern:
Dispatch pattern 1.: T 3(1) T 3(2) ... T 3(n), T 3(1) T 3(2) ... T 3(n) ...;
Dispatch pattern 2.: T 3(1) ... T 3(1), T 3(2) ... T 3(2) ..., T 3(n) ... T 3(n) ...;
Dispatch pattern 3.: T 3(n) T 3(n-1) ... T 3(1), T 3(n) T 3(n-1) ... T 3(1) ...;
Dispatch pattern 4.: T 3(n) ... T 3(n) ..., T 3(2) ... T 3(2), T 3(1) ... T 3(1), T 3(n) ... T 3(n) ..., T 3(2) ... T 3(2), T 3(1) ... T 3(1) ...;
Dispatch pattern 5.: T 3(1) T 3(2) ... T 3(n), T 3(n) T 3(n-1) ... T 3(1) ...;
Dispatch pattern 6.: T 3(n) T 3(n-1) ... T 3(1), T 3(1) T 3(2) ... T 3(n) ...;
Dispatch pattern 7.: T 3(1) ... T 3(1), T 3(2) ... T 3(2) ..., T 3(n) ... T 3(n), T 3(n) ... T 3(n) ..., T 3(2) ... T 3(2), T 3(1) ... T 3(1) ...;
Dispatch pattern 8.: T 3(N) ... T 3(n) ..., T 3(2) ... T 3(2), T 3(1) ... T 3(1), T 3(1) ... T 3(1), T 3(2) ... T 3(2) ..., T 3(n) ... T 3(n) ...;
Above-mentioned scheduling pattern those skilled in the art can reasonably change according to the performance of system etc.Conventionally, patterns, in a scheduling window, are dispatched to transmission mode set T according to above-mentioned one or more in base station 3interior various transmission modes, attempt scheduling; Base station, according to the result of attempting scheduling, obtains the value of each variable in weighting function expression formula.
Step 203: calculate described transmission mode set T 2in the value of weighting function expression formula under various transmission modes; And according to the value of each variable in the described weighting function expression formula of obtaining, calculate described transmission mode set T 3in the value of described weighting function expression formula of various transmission modes;
Step 204: determine in the value of described weighting function expression formula that maximum or transmission mode corresponding to minimum value are switchable transmission mode, and carry out transmission mode switching.
Further, multiple if maximum transmission mode corresponding to the value of weighting function expression formula has, according to random selection or determine in a fixed order switchable transmission mode.
Above-mentioned steps 202 is to transmission mode set T 3the processing procedure of middle transmission mode, if in the result that step 201 is divided, transmission mode set T 3in while thering is no corresponding transmission mode, carry out step 202, directly enter step 203.
Embodiment mono-:
In the present embodiment, suppose that the transmission mode that participates in switching is two kinds of transmit diversity and beam shapings, so, the changing method of the transmission mode of the present embodiment comprises the following steps:
Step 301: be identified for the weighting function expression formula that transmission mode is switched;
Here suppose that this system is the system that maximizes criterion based on spectrum efficiency, so, makes the W in expression formula (1), 1=1, W 2=0, W 3=0 and TH 1=0.01, expression formula (1) is deformed into expression formula (2):
f(SE，BLER，HFR，NI)＝SE·(1-BLER)+0·ε(HFR-0.01)+0·NI
f(SE，BLER，HFR，NI)＝SE·(1-BLER) (2)
Step 302: according to the reporting information of the metrical information of base station side and end side and schedule information, estimate under each transmission mode the value of each variable in weighting function expression formula;
Step 303a: according to the value of each variable in the weighting function expression formula of estimating, the transmission mode set T that participates in switching is divided into and can not becomes the transmission mode of changeable transmission mode set T 1, obtain transmission mode and switch the transmission mode set T of required full detail 2transmission mode set T with needs trial 3;
Here, suppose that step 302 fails to estimate the value of each variable in effective weighting function expression formula, so, transmit diversity and beam shaping are all divided in to transmission mode set T 3in set.
Step 303b: transmit diversity and two kinds of transmission modes of beam shaping are attempted respectively to scheduling, the value of each variable in the weighting function expression formula of acquisition;
Here, suppose that the channel quality of adjacent scheduling is substantially constant, so, in order to obtain information more accurately, attempt the scheduling pattern selection scheduling pattern of scheduling 1., that is: transmit diversity T 3(1), beam shaping T 3(2), transmit diversity T 3(1), beam shaping T 3(2) ...
For transmit diversity T 3(1) in the weighting function expression formula, obtaining after attempting scheduling, the value of each variable is: SE=2.1, BLER=0.1, HFR=0, NI=0;
For beam shaping T 3(2) in the weighting function expression formula, obtaining after attempting scheduling, the value of each variable is: SE=3, BLER=0.1, HFR=0, NI=1.
Step 303c: according to the value of each variable in the weighting function expression formula obtaining, calculate described transmission mode set T 3in the value of weighting function expression formula of various transmission modes;
According to expression formula (2), the value of the weighting function expression formula of transmit diversity transmission mode is:
f(SE，BLER，HFR，NI)＝SE·(1-BLER)＝2.1×(1-0.1)＝1.89。
According to expression formula (2), the value of the weighting function expression formula of beamforming transmission pattern is:
f(SE，BLER，HFR，NI)＝SE·(1-BLER)＝3×(1-0.1)＝2.7。
Step 303d: determine that in the value of described weighting function expression formula, transmission mode corresponding to maximum is switchable transmission mode, and carry out transmission mode switching.
In the present embodiment, because the value of the weighting function expression formula of beam shaping is larger than the value of the weighting function expression formula of transmit diversity, therefore, switchable transmission mode is beam shaping, and then transmission mode is switched to beam shaping.
Embodiment bis-:
In the present embodiment, suppose that the transmission mode that participates in switching has three kinds of transmit diversity, single current beam shaping and dual-layer beam forming, so, the changing method of the transmission mode of the present embodiment comprises the following steps:
Step 401: be identified for the weighting function expression formula that transmission mode is switched;
Here, suppose this system be requirement packet loss not higher than 0.001 system, so, make the W in expression formula (1) 1=1, W 2=-100, W 3=0 and TH 1=0.001, expression formula (1) is deformed into expression formula (3):
f(SE，BLER，HFR，NI)＝SE·(1-BLER)-100·ε(HFR-0.001)+0·NI
f(SE，BLER，HFR，NI)＝SE·(1-BLER)-100·ε(HFR-0.001) (3)
Step 402: according to the reporting information of the metrical information of base station side and end side and schedule information, estimate under each transmission mode the value of each variable in weighting function expression formula;
According to the reporting information of the metrical information of base station side and end side and schedule information, the result of estimation is: the value of the variable packet loss HFR of dual-layer beam forming transmission pattern is 0.01, and the value of variable block error rate BLER is 0.1, out of Memory the unknown; The variable packet loss HFR of single current beamforming transmission pattern is 0.0001, other information the unknowns; The information of estimating transmit diversity transmission mode is all unknown;
Step 403a: according to the value of each variable in the weighting function expression formula of estimating, the transmission mode set that participates in switching is divided into and can not becomes the transmission mode of changeable transmission mode set T 1, obtain transmission mode and switch the transmission mode set T of required full detail 2transmission mode set T with needs trial 3;
Concrete, the theoretical optimal value of supposing variable spectrum efficiency SE is 5, its theoretical worst-case value is 0; The theoretical optimal value of the interference NI of variable to adjacent area is 0, and its theoretical worst-case value is 100; The theoretical optimal value of variable block error rate BLER is 0, and its theoretical worst-case value is 1;
The value of each variable in each transmission mode weighting function expression formula of estimating according to step 402, for dual-layer beam forming transmission pattern, because variable packet loss HFR 0.01 is greater than 0.001, even therefore variable spectrum efficiency SE gets theoretical optimal value 5, variable is got theoretical optimal value 0 to the interference NI of adjacent area, and the value of the expression formula of its weighting function is:
f(SE，BLER，HFR，NI)＝5×(1-0.1)-100×1+0×0＝-95.5。
And for single current beamforming transmission pattern, even if variable spectrum efficiency SE gets theoretical worst-case value 0, variable is got theoretical worst-case value 100 to the interference NI of adjacent area, variable block error rate BLER is got theoretical worst-case value 1;
f(SE，BLER，HFR，NI)＝1×0×(1-1)-100×0+0×100＝0。
Known by above-mentioned calculating, dual-layer beam forming transmission pattern is divided in transmission mode set T 1in, and single current beamforming transmission pattern and transmit diversity transmission mode are divided in transmission mode set T 3in.
Step 403b: transmit diversity and two kinds of transmission modes of single current beam shaping are attempted respectively to scheduling, the value of each variable in the weighting function expression formula of acquisition;
Here, suppose that channel quality is gradual, simple in order to realize in engineering, attempt the scheduling pattern selection scheduling pattern of scheduling 2., that is: transmit diversity T 3(1), transmit diversity T 3(1), single current beam shaping T 3(2), single current beam shaping T 3(2) ...
For transmit diversity T 3(1) in the weighting function expression formula, obtaining after attempting scheduling, the value of each variable is: SE=2, BLER=0.1, HFR=0, NI=1;
For single current beam shaping T 3(2) in the weighting function expression formula, obtaining after attempting scheduling, the value of each variable is: SE=1, BLER=0.1, HFR=0, NI=1;
Step 403c: according to the value of each variable in the weighting function expression formula obtaining, calculate described transmission mode set T 3in the value of weighting function expression formula of various transmission modes;
According to expression formula (3), the value of the weighting function expression formula of transmit diversity transmission mode is:
f(SE，BLER，HFR，NI)＝SE·(1-BLER)-100·ε(HFR-0.001)＝1.8；
According to expression formula (3), the value of the weighting function expression formula of single current beamforming transmission pattern is:
f(SE，BLER，HFR，NI)＝SE·(1-BLER)-100·ε(HFR-0.001)＝0.9；
Step 403d: determine that in the value of described weighting function expression formula, transmission mode corresponding to maximum is switchable transmission mode, and carry out transmission mode switching.
In the present embodiment, because the value of the weighting function expression formula of transmit diversity is larger than the value of the weighting function expression formula of single current beam shaping, therefore, switchable transmission mode is transmit diversity, and then transmission mode is switched to transmit diversity.
Fig. 3 is the composition structural representation of the switching device shifter of transmission mode of the present invention, and as shown in Figure 3, the switching device shifter of described transmission mode comprises determining unit 31, estimation unit 32 and the first computing unit 33 and switch unit 34; Wherein,
Described determining unit 31, the weighting function expression formula of switching for being identified for transmission mode;
Described estimation unit 32, for according to the reporting information of the metrical information of base station side and end side and schedule information, estimates under each transmission mode the value of each variable in described weighting function expression formula;
In described weighting function expression formula, each variable comprises spectrum efficiency, Block Error Rate, packet loss and the interference that adjacent area is produced.
The metrical information of described base station side comprises: channel estimating information and channel measurement information;
The reporting information of described end side comprises: channel quality instruction, pre-coding matrix instruction and order instruction;
The schedule information of described end side comprises: the transmission mode of the modulation of scheduling times, scheduling and encoding scheme and scheduling.
Described the first computing unit 33, for calculating the value of the described weighting function expression formula under described each transmission mode;
Described switch unit 34, is switchable transmission mode for value maximum or transmission mode corresponding to minimum value of determining described weighting function expression formula, and carries out transmission mode switching.
Further, the switching device shifter of described transmission mode also comprises selected cell, described selected cell, has when multiple for the value maximum of described weighting function expression formula or transmission mode corresponding to minimum value, determines switchable transmission mode according to random selection or permanent order.
Fig. 4 is the composition structural representation of the first computing unit in Fig. 3, and as shown in Figure 4, described the first computing unit 33 comprises division unit 41, scheduling unit 42 and the second computing unit 43; Wherein,
Described division unit 41, for according to the value of the each variable of described weighting function expression formula under each transmission mode of estimating, is divided into the transmission mode set T that participates in switching can not become the transmission mode of changeable transmission mode set T 1, obtain transmission mode and switch the transmission mode set T of required full detail 2transmission mode set T with needs trial 3;
Described scheduling unit 42, for to described transmission mode set T 3in a scheduling window, attempt scheduling according to scheduling pattern, obtain the value of each variable in weighting function expression formula;
Here, described scheduling window is for describing continuous several times scheduling; Bring system loss owing to attempting scheduling meeting, therefore, the scope that the arranges expense setting that generally can allow according to system of scheduling window, is generally the 1%-10% of the switching cycle of transmission mode.Described scheduling pattern comprises:
Scheduling pattern one: in order or backward successively to described transmission mode set T 3interior each transmission mode is carried out round-robin scheduling;
Scheduling pattern two: in order or backward successively to described transmission mode set T 3in each transmission mode carry out round-robin scheduling, and each transmission mode is every take turns in continuously the number of times of scheduling be greater than once;
Scheduling pattern three: odd number wheel in order or backward successively to described transmission mode set T 3interior each transmission mode is dispatched, and even number wheel is by backward or sequentially successively to described transmission mode set T 3interior each transmission mode is dispatched;
Scheduling pattern four: odd number wheel in order or backward to described transmission mode set T 3interior each transmission mode is dispatched, and even number wheel is by backward or sequentially to described transmission mode set T 3in each transmission mode dispatch, and each transmission mode is every take turns in continuously the number of times of scheduling be greater than once.
Described the second computing unit 43, for calculating the divided transmission mode set T that obtains transmission mode and switch required full detail 2in the value of weighting function expression formula under various transmission modes; And calculate described transmission mode set T according to the value of each variable in the described weighting function expression formula of obtaining 3in the value of weighting function expression formula of various transmission modes.
If the above-mentioned integrated unit of the present invention is realized and during as production marketing independently or use, also can be stored in a computer read/write memory medium using the form of software function module.Based on such understanding, the part that the technical scheme of the embodiment of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprises that some instructions are in order to make a computer equipment (can be personal computer, server or the network equipment etc.) carry out all or part of of method described in the present invention each embodiment.And aforesaid storage medium comprises: movable storage device, read-only memory (ROM, Read-Only Memory), the various media that can be program code stored such as random access memory (RAM, Random Access Memory), magnetic disc or CD.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.

Claims (12)

1. a changing method for transmission mode, is characterized in that, described method comprises:
Be identified for the weighting function expression formula that transmission mode is switched;
According to the reporting information of the metrical information of base station side and end side and schedule information, estimate under each transmission mode the value of each variable in described weighting function expression formula;
Calculate the value of described weighting function expression formula under described each transmission mode;
Determine in the value of described weighting function expression formula that maximum or transmission mode corresponding to minimum value are switchable transmission mode, and carry out transmission mode switching.
2. method according to claim 1, is characterized in that, the value of the weighting function expression formula under the described each transmission mode of described calculating, comprising:
According to the value of each variable in described weighting function expression formula under each transmission mode of estimating, divide transmission mode set;
The transmission mode set T that divided needs are attempted 3in a scheduling window, attempt scheduling according to scheduling pattern, obtain the value of each variable in weighting function expression formula;
Calculate the transmission mode set T that obtains transmission mode and switch required full detail dividing 2in the value of weighting function expression formula under various transmission modes; And calculate described transmission mode set T according to the value of each variable in the described weighting function expression formula of obtaining 3in the value of weighting function expression formula of various transmission modes.
3. method according to claim 2, is characterized in that, described scheduling pattern comprises:
Scheduling pattern one: in order or backward successively to described transmission mode set T 3interior each transmission mode is carried out round-robin scheduling;
Scheduling pattern two: in order or backward successively to described transmission mode set T 3in each transmission mode carry out round-robin scheduling, and each transmission mode is every take turns in continuously the number of times of scheduling be greater than once;
Scheduling pattern three: odd number wheel in order or backward successively to described transmission mode set T 3interior each transmission mode is dispatched, and even number wheel is by backward or sequentially successively to described transmission mode set T 3interior each transmission mode is dispatched;
Scheduling pattern four: odd number wheel in order or backward to described transmission mode set T 3interior each transmission mode is dispatched, and even number wheel is by backward or sequentially to described transmission mode set T 3in each transmission mode dispatch, and each transmission mode is every take turns in continuously the number of times of scheduling be greater than once.
4. method according to claim 1, is characterized in that, the each variable in described weighting function expression formula comprises spectrum efficiency, Block Error Rate, packet loss and the interference that adjacent area is produced.
5. method according to claim 1, is characterized in that, the metrical information of described base station side comprises: channel estimating information and channel measurement information;
The reporting information of described end side comprises: channel quality instruction, pre-coding matrix instruction and order instruction;
The schedule information of described end side comprises: the transmission mode of the modulation of scheduling times, scheduling and encoding scheme and scheduling.
6. according to the method described in claim 1 to 5 any one, it is characterized in that, described method also comprises: in the value of described weighting function expression formula, transmission mode corresponding to maximum or minimum value has when multiple, determines switchable transmission mode according to random selection or permanent order.
7. a switching device shifter for transmission mode, is characterized in that, described device comprises determining unit, estimation unit, the first computing unit and switch unit, wherein,
Described determining unit, the weighting function expression formula of switching for being identified for transmission mode;
Described estimation unit, for according to the reporting information of the metrical information of base station side and end side and schedule information, estimates under each transmission mode the value of each variable in described weighting function expression formula;
Described the first computing unit, for calculating the value of described weighting function expression formula under described each transmission mode;
Described switch unit, is switchable transmission mode for value maximum or transmission mode corresponding to minimum value of determining described weighting function expression formula, and carries out transmission mode switching.
8. device according to claim 7, is characterized in that, described the first computing unit comprises division unit, scheduling unit and the second computing unit, wherein,
Described division unit, for according to the value of the each variable of described weighting function expression formula under each transmission mode of estimating, divides transmission mode set;
Described scheduling unit, the transmission mode set T attempting for the needs to divided 3in a scheduling window, attempt scheduling according to scheduling pattern, obtain the value of each variable in weighting function expression formula;
Described the second computing unit, for calculating the divided transmission mode set T that obtains transmission mode and switch required full detail 2in the value of weighting function expression formula under various transmission modes; And calculate described transmission mode set T according to the value of each variable in the described weighting function expression formula of obtaining 3in the value of weighting function expression formula of various transmission modes.
9. device according to claim 8, is characterized in that, described scheduling pattern comprises:
Scheduling pattern one: in order or backward successively to described transmission mode set T 3interior each transmission mode is carried out round-robin scheduling;
Scheduling pattern two: in order or backward successively to described transmission mode set T 3in each transmission mode carry out round-robin scheduling, and each transmission mode is every take turns in continuously the number of times of scheduling be greater than once;
Scheduling pattern three: odd number wheel in order or backward successively to described transmission mode set T 3interior each transmission mode is dispatched, and even number wheel is by backward or sequentially successively to described transmission mode set T 3interior each transmission mode is dispatched;
Scheduling pattern four: odd number wheel in order or backward to described transmission mode set T 3interior each transmission mode is dispatched, and even number wheel is by backward or sequentially to described transmission mode set T 3in each transmission mode dispatch, and each transmission mode is every take turns in continuously the number of times of scheduling be greater than once.
10. device according to claim 7, is characterized in that, the each variable in described weighting function expression formula comprises spectrum efficiency, Block Error Rate, packet loss and the interference that adjacent area is produced.
11. devices according to claim 7, is characterized in that, the metrical information of described base station side comprises: channel estimating information and channel measurement information;
The reporting information of described end side comprises: channel quality instruction, pre-coding matrix instruction and order instruction;
The schedule information of described end side comprises: the transmission mode of the modulation of scheduling times, scheduling and encoding scheme and scheduling.
12. according to the device described in claim 7 to 11 any one, it is characterized in that, described device also comprises selected cell;
Described selected cell, has when multiple for the value maximum of described weighting function expression formula or transmission mode corresponding to minimum value, determines switchable transmission mode according to random selection or permanent order.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106954279A (en) * 2017-03-09 2017-07-14 上海海事大学 A kind of underwater sensor network Lothrus apterus method based on double robin scheduling mechanism
WO2022001788A1 (en) * 2020-06-29 2022-01-06 中兴通讯股份有限公司 Communication management method and apparatus, and network device and storage medium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102724726A (en) * 2012-06-12 2012-10-10 大唐移动通信设备有限公司 Method and device for switching multiple input multiple output (MIMO) mode in transmission mode (TM8) in long-term evolution (LTE) system
CN102970119A (en) * 2012-11-09 2013-03-13 大唐移动通信设备有限公司 Method for switching first transmission mode into second transmission mode
CN103095397A (en) * 2011-11-04 2013-05-08 华为技术有限公司 Transmission mode switching method and device and system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100713403B1 (en) * 2003-09-30 2007-05-04 삼성전자주식회사 Apparatus and method for controlling transmission scheme according to channel state in a communication system
WO2005122414A1 (en) * 2004-06-14 2005-12-22 Matsushita Electric Industrial Co., Ltd. Radio communication device
CN101557559B (en) * 2008-04-11 2011-09-21 中兴通讯股份有限公司 Method for switching transmission modes of multimedia broadcasting service and multicasting service
JP2010056615A (en) * 2008-08-26 2010-03-11 Panasonic Electric Works Co Ltd Load control system
CN102244564B (en) * 2010-05-11 2014-12-10 中兴通讯股份有限公司 Downlink transmission method and base station of MIMO (Multiple Input Multiple Output) system
IN2010DE02109A (en) * 2010-09-03 2015-08-14 Motorola Mobility Inc
JP5651005B2 (en) * 2010-12-22 2015-01-07 京セラ株式会社 Base station, communication terminal and communication system
CN103001732B (en) * 2011-09-19 2017-04-05 北京邮电大学 Transmission mode selection method, device and mobile terminal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103095397A (en) * 2011-11-04 2013-05-08 华为技术有限公司 Transmission mode switching method and device and system
CN102724726A (en) * 2012-06-12 2012-10-10 大唐移动通信设备有限公司 Method and device for switching multiple input multiple output (MIMO) mode in transmission mode (TM8) in long-term evolution (LTE) system
CN102970119A (en) * 2012-11-09 2013-03-13 大唐移动通信设备有限公司 Method for switching first transmission mode into second transmission mode

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106954279A (en) * 2017-03-09 2017-07-14 上海海事大学 A kind of underwater sensor network Lothrus apterus method based on double robin scheduling mechanism
CN106954279B (en) * 2017-03-09 2020-03-27 上海海事大学 Underwater sensor network conflict-free method based on double-wheel turning scheduling mechanism
WO2022001788A1 (en) * 2020-06-29 2022-01-06 中兴通讯股份有限公司 Communication management method and apparatus, and network device and storage medium

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