CN101686098B - Method and device for selecting modulation and coding scheme combination, and communication system - Google Patents
Method and device for selecting modulation and coding scheme combination, and communication system Download PDFInfo
- Publication number
- CN101686098B CN101686098B CN2008101614804A CN200810161480A CN101686098B CN 101686098 B CN101686098 B CN 101686098B CN 2008101614804 A CN2008101614804 A CN 2008101614804A CN 200810161480 A CN200810161480 A CN 200810161480A CN 101686098 B CN101686098 B CN 101686098B
- Authority
- CN
- China
- Prior art keywords
- communication system
- channel quality
- modulation
- quality parameter
- combination
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
The invention discloses a method and a device for selecting a proper modulation and coding scheme (MCS) combination for a communication system, and a communication system. The method comprises the following steps: taking statistics on channel quality parameters in the communication system to obtain the probability distribution of the parameters; determining the applicable range of the channel quality parameter supported by the communication system from the probability distribution according to the predetermined requirements which the communication system wants to meet; determining M target channel quality parameter values within the applicable range in the predetermined mode, wherein M is equal to the total number of the MCS combinations which the communication system can support; and according to the predetermined requirements which the communication system wants to meet, selecting M MCS combinations respectively meeting the requirements for the M target channel quality parameter values from all the possible combinations of modulation schemes and coding schemes as an MCS combination set which can be selected by the communication system. Through the statistical analysis on the probability distribution of the channel quality parameters, the invention optimizes the design and the selection of the MCS combinations, thereby maximizing the system capacity.
Description
Technical field
Present invention relates in general to the communications field, especially relate to the design and selection technology of Modulation and Coding Scheme (MCS, the Modulation and Coding Scheme) combination in the communications field.
Background technology
All can receive the influence of transmission medium more or less in the communication system arbitrarily, thereby reduce the reliability of transmission.In order to improve transmission reliability, often need design modulation, channel coding/decoding technology at transmitting-receiving two-end, this point is particularly outstanding in wireless transmitting system.The combination of every kind of Modulation and Coding Scheme is corresponding to a kind of spectrum efficiency, yet multiple MCS combination also is possible corresponding to same spectrum efficiency.For example, QPSK (QPSK) modulation and bit rate are the efficiency of transmission that the combination of 1/2 convolution code or Turbo code can realize 1 bit/symbol (bit/symbol).Through changing order of modulation (for example, QPSK, multi-system phase shift keying (M-PSK), hexadecimal quadrature Modulation and Amplitude Modulation (16QAM), M-ary orthogonal Modulation and Amplitude Modulation (M-QAM) etc.) and/or bit rate (1/2,2/3,3/4 etc.), can realize multiple MCS combination.Different MCS combinations can be applicable to different transmission environments; For example; The channel that transmission conditions are good can make up with the higher MCS of spectrum efficiency and transmit more information, and the channel of transmission conditions difference can make up few information of transmitting with the lower MCS of spectrum efficiency, to guarantee transmission quality.Usually, in communication system, the quality of transmission conditions can use reception Signal to Interference plus Noise Ratio (SINR, Signal to Interferenceplus Noise Ratio) to weigh.Certainly, also can there be other the index or the parameter of expression signal intensity sizes such as parameter, for example signal to noise ratio snr to represent the channel quality quality.Under the situation of given channel quality, in order to satisfy certain transmission requirement, for example, transmitted error rate, for example Block Error Rate (BLER) are not more than certain predetermined threshold, for example 10%, can select to have the MCS combination of high as far as possible spectrum efficiency usually.At this, transmitted error rate is not limited to BLER, and can be the parameter that characterizes the performance of certain Modulation and Coding Scheme combination, for example, and the error rate (BER), FER (FER) etc.Generally; Every kind of MCS is combined in has different transmitted error rate (for example BLER) under the different channel quality parameter (for example SINR); Therefore, can obtain the curve chart (curve chart of BLER and SINR for example of the transmitted error rate and the channel quality parameter of every kind of MCS combination.
Select different MCS according to different received channel quality (for example, receiving SINR).Combination, to guarantee the throughput of transmissions of communication system as wide as possible, this technology is called as adaptive M CS selection technology.The excursion that receives SINR possibly depend on many factors, and for example system configuration, transmission medium distribute, the User Status variation of system service etc.With the cellular mobile radio communications system is example, and the transmission of wireless signals decay of the user experience nearer apart from the base station is less, receive SINR and want big, and the user's far away apart from the base station signal attenuation is bigger, and receiving SINR will be smaller; In addition, for the multiplexing factor cellular system of many base stations of 1, the user who is positioned at cell edge can receive the interference of non-serving base stations, and SINR is lower than the user's who is positioned at center of housing estate SINR.On statistical meaning; The size that the user receives SINR can be used probability distribution, for example add up density function (CDF; Cumulate Density Function) or probability density function (PDF, Probability Density Function) represent.From these SINR distribution curves, can generally know user's in the communication system SINR excursion.
In order to utilize power system capacity as far as possible fully; Adaptive M CS selects technology must reflect the current transmission channel condition as far as possible exactly; That is, should select to satisfy for example BLER MCS combination that require, that have high as far as possible spectrum efficiency according to for example current reception SINR value.Certainly, receiving terminal also must be notified the MCS combination that chooses to transmitting terminal through suitable mode, so that transmitting terminal correctly sends.Also will take transmission channel owing to send the MCS combined message, so the MCS combination that can support of system can not be set to unlimited manyly, all stipulate the MCS combination that receiving-transmitting sides can be supported in many communication standards.For example: at IEEE802.16E standard (IEEE P802.16e/D12-Draft IEEE Standard for Local and Metropolitanarea Networks-Part 16:Air Interface for Fixed and Mobile BroadbandWireless Access Systems-Amendment for Physical and MediunAccessControl Layers for Combined Fixed and Mobile Operation in LicensedBands; In October, 2005), stipulated that 11 kinds of MCS shown in following table 1 make up:
Table 1
From disclosed many articles and/or patent at present; All be under situation about discussing, how to design the MCS combination mostly in given spectrum efficiency; So that the relation curve of BLER and SINR is more precipitous, that is to say, make that BLER is littler under the situation of given SINR.For example, can be referring to the following several pieces of articles of listing: be published in " Optimized link adaptation for wireless packet communications basedon discrete-rate modulation and coding schemes " on the SignalProcessing Advances in Wireless Communications IEEE 2007 by Harsini and Lahouti; Be published in " Symbol rate and modulation levelcontrolled adaptive modulation/TDMA/TDD for personal communicationsystems " on the IEEE VTC1995 by T.Sampei and S.Morinaga; And be published in " Adaptive coding and modulation in an OFDM-TDMA communicationsystem " on the IEEE VTC1998 etc. by Rohling and Grunheid R..These lists of references are incorporated in this by reference.
Yet existing various adaptive M CS select technology can't guarantee to make capability of communication system to maximize.Therefore, how from the angle of system design, under the situation of given MCS combined number, be that target is selected the MCS combination that is fit to improve throughput of system, make the power system capacity maximization to be still one of current problem that will solve.
Summary of the invention
Provided hereinafter about brief overview of the present invention, so that the basic comprehension about some aspect of the present invention is provided.Should be appreciated that this general introduction is not about exhaustive general introduction of the present invention.It is not that intention is confirmed key of the present invention or pith, neither be intended to limit scope of the present invention.Its purpose only is to provide some notion with the form of simplifying, with this as the preorder in greater detail of argumentation after a while.
Make full use of problems such as power system capacity in view of failing of existing in the existing communication system; The objective of the invention is; Through a kind of communication system that communication system is selected the method for suitable MCS combination, installed and/or comprise this device that is used to is provided, come to solve at least in part the problems referred to above that exist in the prior art.
To achieve these goals; According to an aspect of the present invention; A kind of method that communication system is selected suitable Modulation and Coding Scheme (MCS) combination that is used to is provided; This method may further comprise the steps: the channel quality parameter in the communication system is added up, to obtain the probability distribution of this channel quality parameter; According to the predetermined requirement that the communication system needs satisfy, from said probability distribution, confirm the scope of application of the said channel quality parameter that communication system need be supported; Mode according to predetermined is confirmed M destination channel mass parameter value in the said scope of application, and wherein, M is natural number and equals the sum that Modulation and Coding Scheme that communication system can support makes up; And according to the satisfied predetermined requirement of communication system needs; From the combination of all possible modulation scheme and encoding scheme for communication system; Select to reach respectively the M kind Modulation and Coding Scheme combination that M destination channel mass parameter value requires, as the set of the Modulation and Coding Scheme combination that can supply communication system to select for use.
According to another aspect of the present invention; A kind of device that communication system is selected suitable Modulation and Coding Scheme combination that is used to also is provided; This device comprises: the parametric statistics unit is used for the channel quality parameter of communication system is added up, to obtain the probability distribution of this channel quality parameter; Memory cell is used for the various predetermined requirement that the storing communication system need satisfy, and the various modulation schemes and the encoding scheme that can supply communication system to select; The target component value is confirmed the unit; Be used for according to the satisfied predetermined requirement of communication system needs; From said probability distribution, confirm the scope of application of the said channel quality parameter that communication system need be supported; And confirm M destination channel mass parameter value in the said scope of application according to predetermined mode, wherein, M is natural number and equals the sum that Modulation and Coding Scheme that communication system can support makes up; And selected cell; Be used for according to the satisfied predetermined requirement of communication system needs; From the combination of all possible modulation scheme and encoding scheme for communication system; Select to reach respectively the M kind Modulation and Coding Scheme combination that M destination channel mass parameter value requires, as the set of the Modulation and Coding Scheme combination that can supply communication system to select for use.
According to a further aspect of the invention, a kind of communication system is provided also, it comprises: above-described device is used to communication system and selects suitable Modulation and Coding Scheme combination; And notifying device, be used for giving the receiving-transmitting sides of communication system as the Modulation and Coding Scheme combination notice of communication system with the set of the Modulation and Coding Scheme of said selection combination, use when intercoming mutually between the receiving-transmitting sides.
According to others of the present invention, corresponding computer readable storage medium and computer program are provided also.
An advantage of the present invention is; The distribution of the channel quality parameter (for example SINR etc.) through the statistical analysis communication system; Under the total constant situation of the MCS combination that guarantees to be suitable for this communication system; Optimize the design and the selection of MCS combination (comprising modulation scheme and/or encoding scheme), thereby make the power system capacity maximization.
Another advantage of the present invention is, for the many requirements how need satisfy according to communication system are that the MCS combination that Communication System Design or selection are fit to provides design or the selection thinking that is superior to existing various MCS design or system of selection.
Another advantage of the present invention is that method and/or device can use in accordance with the principles of the present invention, use in the time of also can changing in the configuration of communication system when the initial designs of communication system.
The present invention also has an advantage to be, method and/or device be not only applicable to the communication system of using adaptive M CS system of selection in accordance with the principles of the present invention, but also applicable to the communication system of using non-self-adapting MCS system of selection.
Through below in conjunction with the detailed description of accompanying drawing to most preferred embodiment of the present invention, these and other advantage of the present invention will be more obvious.
Description of drawings
The present invention can wherein use same or analogous Reference numeral to represent identical or similar parts in institute's drawings attached through with reference to hereinafter combining the given description of accompanying drawing to be better understood.Said accompanying drawing comprises in this manual and forms the part of this specification together with following detailed description, and is used for further illustrating the preferred embodiments of the present invention and explains principle and advantage of the present invention.In the accompanying drawings:
It is the indicative flowchart that communication system is selected the method for suitable MCS combination that Fig. 1 shows according to embodiments of the invention;
Fig. 2 shows the example of the schematic probability distribution (representing with PDF) of the reception SINR that obtains through system emulation;
Fig. 3 shows an example that communication system SINR distribution applicatory is carried out the method for interval division; And
It is the schematic block diagram that communication system is selected the MCS combination selection device of suitable MCS combination that Fig. 4 shows according to embodiments of the invention.
It will be appreciated by those skilled in the art that in the accompanying drawing element only for simple and clear for the purpose of and illustrate, and be not necessarily to draw in proportion.For example, some size of component possibly amplified with respect to other elements in the accompanying drawing, so that help to improve the understanding to the embodiment of the invention.
Embodiment
To combine accompanying drawing that example embodiment of the present invention is described hereinafter.In order to know and for simplicity, in specification, not describe all characteristics of actual execution mode.Yet; Should understand; In the process of any this practical embodiments of exploitation, must make a lot of decisions, so that realize developer's objectives, for example specific to execution mode; Meet and system and professional those relevant restrictive conditions, and these restrictive conditions may change along with the difference of execution mode to some extent.In addition, might be very complicated and time-consuming though will also be appreciated that development, concerning the those skilled in the art that have benefited from present disclosure, this development only is customary task.
At this; What also need explain a bit is; For fear of having blured the present invention, only show in the accompanying drawings and closely-related apparatus structure of scheme according to the present invention and/or treatment step, and omitted other details little with relation of the present invention because of unnecessary details.
As noted before, the MCS combination that receiving-transmitting sides can be supported in communication system can have a variety of, different modulation schemes to combine with the channel coding schemes of different bit rates, can produce the identical or different MCS of a variety of spectrum efficiencies and make up.
It is the indicative flowchart that communication system is selected the method 100 of suitable MCS combination that Fig. 1 shows according to embodiments of the invention.
For the ease of explanation; Below (promptly with the recipient's of communication system Signal to Interference plus Noise Ratio; Receive SINR; Below also abbreviate SINR sometimes as) as the parameter of expression channel quality, and be not more than the transmission requirement of certain predetermined threshold (for example 10%) as system with Block Error Rate (BLER), come being that the method for the communication system MCS combination selecting to be fit to describes according to the embodiment of the invention.But, it will be appreciated by those skilled in the art that the present invention is not limited only to this, but go for having in other the communication system of channel quality parameter and/or transmission requirement.
As shown in Figure 1, in step S110,, obtain the probability distribution of this channel quality parameter through the channel quality parameter in the communication system (that is, receive SINR, below also abbreviate SINR sometimes as) is added up.
Need to prove at this; If before the actual arrangement communication network (for example; During the design of communications system) use method 100 according to the embodiment of the invention, then can add up, thereby obtain the probability distribution of SINR through the reception SINR of system emulation to the communication system of expection; And when this method under the situation that arranges communication network, used according to the embodiment of the invention, can obtain the probability distribution of SINR through statistics to actual drive test result.In order to reflect truth, need the reception SINR under the statistics different base station.And, when carrying out system emulation, can adopt any known simulator and/or emulation technology to come to add up to receiving SINR.For example, the power ratio of the signal of each location point and noise-plus-interference in the recording cell 10000 or the more diverse location points, be SINR, add up the number of SINR on the different value interval, thereby obtain the probability distribution graph of SINR.
Fig. 2 shows the example of the schematic probability distribution (representing with PDF) of the reception SINR that obtains through system emulation.In Fig. 2, abscissa is represented the value (is unit with dB) of SINR, and ordinate is represented probable value, that is to say, the probability when any ordinate value of certain on the curve among Fig. 2 is illustrated in SINR and has the abscissa value of this point.Be not difficult to find out that from Fig. 2 the probability distribution of different SINR values is different.And for the various network configuration, the probability distribution that receives SINR also can be different.Usually, the value excursion that receives SINR is very big, and for example, the value of SINR can be from-15dB to+30dB as shown in Figure 2.And the likelihood ratio that the SINR value of intermediate range in illustrated this example (for example ,-5 shown in Fig. 2～+ scope of 20dB) occurs is higher.This be because, each user will inevitably be covered by some serving BSs in cellular radio Communication system for example, therefore the variation of most of users' SINR can be very not big.For the ease of describing, be how the example explanation selects MCS to make up to make the power system capacity maximization with SINR distribution map shown in Figure 2 below.
Refer again to Fig. 1, in step S120,, confirm that communication system is for satisfying the SINR scope that for example predetermined requirements such as system's coverage rate should be supported based on the probability distribution graph of the SINR that obtains among the step S110.
Specifically, based on the probability distribution graph (probability distribution graph for example shown in Figure 2) of the SINR that is obtained, the indexs such as system's coverage rate that satisfy are as required confirmed the SINR scope that communication system will be supported.For example; With the highest point of the probable value in the probability distribution graph shown in Figure 2 is central point; Confirm minimum and the highest SINR point to the left and right sides symmetrically; Promptly enlarge the scope of SINR symmetrically, make the area of the curve regions in the SINR scope of ordering to the highest SINR be not less than predetermined system's coverage rate, for example 90% from minimum SINR point.Like this, the SINR probability distribution graph based on shown in Figure 2 can obtain-the SINR scope of 5dB～20dB.Obviously, those skilled in the art can confirm minimum SINR point (supposing to represent with X the SINR value of this point) and the highest SINR point (supposing to represent with Y the SINR value of this point) through other mode based on the probability distribution graph of SINR as required; For example; The minimum value of can be as required directly confirming channel quality parameter and maximum etc., thereby the SINR scope that the system that determines will support (that is interval [X; Y]), also can be referred to as the SINR scope of application.
Then, in step S130, can confirm the number of the MCS combination that communication system can be supported at most, suppose to represent with natural number M according to the designing requirement of for example system, overhead information etc.For simplicity, below M MCS combination of hypothesis becomes a plurality of ranks according to spectrum efficiency sequence arrangement from small to large.
As shown in Figure 1; The processing procedure of method 100 proceeds to step S140, according to determined MCS combined number M among the step S130, according to predetermined mode; Based on the probability distribution graph of said SINR, confirm M the target SINR value (for centrifugal pump) in said SINR scope.M is generally 2 integral number power, and for example 8,16,32 etc., can suppose M=16 at this.
As described in the preceding text, the variation of SINR can be very not big, therefore can consider to reflect SINR value variation characteristic through the rank that M kind MCS combination suitably is set.In simple terms, in the higher scope of SINR probability of occurrence, other MCS combination of more stages can be set, and, other MCS combination of less level can be set in the lower zone of SINR probability of occurrence.That is, not when evenly distributing when SINR distributes, the rank of corresponding MCS combination also is designed to not be equally distributed; And be when evenly distributing when SINR distributes, the MCS rank also is designed to uniformly.Like this, be complementary, can reach the maximized purpose of power system capacity through other setting of MCS combination stage is distributed with SINR.
Specifically, in step S140 shown in Figure 1, can be according to for example mode shown in Figure 3, with the SINR scope of application, promptly interval [X, Y] be divided into the M-1 sub-interval, amount to M interval endpoint x thereby determine
1=X, x
2..., x
M/2, x
M/2+1..., x
M-1, x
M=Y, the abscissa value of each end points is desired target SINR value.That is to say, as shown in Figure 3, be the center with the highest point of distribution probability value in the SINR probability distribution graph; According to the L, L+ Δ, L+2* Δ shown in the dotted line of below among Fig. 3 ... siding-to-siding block length (promptly; It is the arithmetic sequence of Δ that siding-to-siding block length constitutes difference), confirm the end points of each sub-interval to the left and right sides symmetrically successively, promptly; Near two target SINR points (that is x among Fig. 3, of central point
M/2And x
M/2+1) between distance (that is, the siding-to-siding block length of a middle sub-interval) be L, from these two target SINR points respectively left and the siding-to-siding block length of i sub-interval to the right be that (wherein, i is a natural number to the L+i* Δ, and 1≤i≤M/2).Wherein, L representes and adjacent two other MCS of level that will select make up the minimum interval siding-to-siding block length between corresponding two target SINR points; Its value depends on the actual distinguishable channel quality estimation scope of system; Usually can be chosen in 0.5dB to the value between the 1.5dB, suppose that in this value be 1dB.
Like this, according to above-mentioned interval division method, can obtain following equality (1):
In the value substitution equality (1) with the M, L, X and the Y that confirm as stated, just can calculate the value of Δ, and then just can calculate the abscissa value of the end points of above-mentioned M-1 sub-interval.The abscissa value of this M end points is communication system for M the target SINR value that should have.
Return referring to Fig. 1 once more.In step S150,, from the combination of all possible modulation scheme and encoding scheme for communication system, select M kind MCS combination desired, that reach the requirement of target SINR value according to resulting M among the step S140 target SINR value.
In this step; Under the situation that is not more than 10% transmission conditions that will satisfy as stated with block error rate BLER as communication system; That communication system is selected for supplying, all possible Modulation and Coding Scheme combination; Obtain the BLER of each MCS combination and the curve chart of SINR through system emulation, and confirm the SINR value when BLER is 10% thus, as making up corresponding SINR value with this kind MCS.Then, in determined numerous SINR values, find with step S140 in M target SINR value obtaining equate respectively or M the most approaching SINR value.Because the restriction of actual coding modulation, can not obtain the qualified fully target SINR that reaches usually is worth the MCS combination, therefore, needs the MCS combination of selecting corresponding SINR and target SINR the most approaching as much as possible.With this M that is found the corresponding M kind of a SINR value MCS combination, be MCS desired, that select for use for communication system and make up.Through in actual communication systems, using these MCS combinations, the SINR value when reaching given BLER equals or approaches the determined target SINR value in front most.
Yet; If after system emulation, find to have two or more MCS to make up that pairing SINR equals or same degree ground approaches a certain target SINR value, the sort of MCS that then can select said two or more MCS to have highest spectral efficiency in making up makes up.Certainly, other choice criteria can be arranged also, for example, the order of modulation of the MCS combination that the assurance of trying one's best during selection will be selected demonstrates the trend of growth (for example, order of modulation from 2 to 4 to 6 ground are increased) etc.
When the MCS combination of from the combination of all possible encoding scheme and modulation scheme, selecting to be fit to; Can adopt known the whole bag of tricks at present, for example, for CTC (CTC; Convolutional Turbo Code) encoding scheme can be taked the method for punching; Can adopt the method for conversion generator matrix for LDPC (low density parity check code, Low DensityParity-Check Code) encoding scheme, or the like.
For example, still continue to use example mentioned above, M=16; Determined SINR scope from-5dB to 20dB; Minimum SINR L at interval is 1dB, method as described above, the value of confirming Δ as stated and and then confirmed 16 target SINR values after; According to resulting target SINR value, can select 16 kinds of MCS combinations shown in following table 2, that adopt CTC coding and QAM modulation.
Table 2
In table 2, a kind of MCS of each line display combination, secondary series is represented the bit rate of the encoding scheme in the MCS combination, the order of modulation of the modulation scheme in the MCS combination is shown in the 3rd tabulation, for example 2, expression QPSK, 4 expression 16QAM, 6 expression 64QAM; The total frequency spectrum efficient of MCS combination is shown in the 4th tabulation, can obtain through the value with the 3rd row on duty of the 2nd row; The 5th tabulation shows that MCS is combined in pairing SINR value when satisfying transmission requirement (that is, making BLER be not more than 10%) (is unit with dB), can suchly as described above obtain through emulation.
Though above to be example with SINR and BLER be described the handling process according to the method 100 of inventive embodiments; But it will be appreciated by those skilled in the art that; Principle of the present invention is not limited thereto, and can according to the situation of reality maybe needs the handling process of method 100 is carried out suitable modification.For example, under the known or predefined situation of number M of the MCS combination that communication system can be supported at most, step S130 can save.In addition; In step S140; (for example, the siding-to-siding block length of each sub-interval satisfies other different relationships, is that the subinterval asymmetricly is to the left and right sides respectively divided at the center by different way with the point with the highest SINR distribution probability value also can to according to the mode different with interval division mode shown in Figure 3; Or the like) obtain M target SINR value in the SINR scope of application, as long as can reflect the variation characteristic of SINR value through the rank that M kind MCS combination suitably is set.In addition; Though having described hereinbefore with the point with the highest SINR distribution probability value is that the center outwards enlarges distribution symmetrically to make it to satisfy predetermined condition; Thereby determine the SINR scope of application; But in method 100, the SINR scope of application also can be to be not both sides, center symmetries with the point with the highest SINR distribution probability value.Certainly,, also possibly also there be substituting or alter mode of other, just do not enumerated one by one at this for method 100.
It is the schematic block diagram that communication system is selected the MCS combination selection device 400 of suitable MCS combination that Fig. 4 shows according to embodiments of the invention.In this MCS combination selection device 400, can carry out the method 100 of above combination flow chart description shown in Figure 1.
As shown in Figure 4, MCS combination selection device 400 comprises that parametric statistics unit 410, memory cell 420, target component value confirm unit 430 and selected cell 440.Wherein, parametric statistics unit 410 can as above described in conjunction with Figure 1, the channel quality parameter of communication system is added up, to obtain the probability distribution of this channel quality parameter.For specification for simplicity, the specific operation process of parametric statistics unit 410 has just no longer detailed.Wherein, said channel quality parameter can be for example to receive SINR etc., but also can be other parameters that can characterize channel quality.
The ask for something that can the storing communication system in memory cell 420 need satisfy; For example; Predetermined system's coverage rate, the transmission conditions the transmitted error rate that allows such as maximum (for example block error rate BLER etc.) waits, the number M that the Modulation and Coding Scheme that allow at most make up etc.These requirements can be stored in the memory cell 420 in advance, also can be in the use of MCS combination selection device 400, to import from the external world and be stored in the memory cell 420.In addition, in memory cell 420, can also store the various modulation schemes and the encoding scheme that can supply communication system to select.
The target component value confirms that unit 430 can be according to some satisfied condition of communication system needs, for example system coverage rate etc.; Based on probability distribution from the channel quality parameter of parametric statistics unit 410; Confirm the scope of application of the channel quality parameter that communication system will be supported; Then can be according to can predefined mode (for example, as above combination interval division method shown in Figure 3 is described) confirming M target component value in this scope of application.
The requirements such as transmission conditions that selected cell 440 can will satisfy according to communication system; The based target parameter value is confirmed unit 430 a determined M target component value, from the combination of all possible modulation scheme and encoding scheme for communication system, selects M kind MCS combination desired, that reach the requirement of target component value.
Parametric statistics unit 410, target component value confirm that unit 430 and selected cell 440 can carry out corresponding separately operation or processing as above combination Fig. 1～3 are described; Therefore; For fear of unnecessary repetition, just no longer their concrete operations or processing procedure further detailed at this.
After the MCS combination of having selected for communication system to be fit to, can give the receiving-transmitting sides in the communication system with its notice so that after mutual communications in be applied.
In addition, in according to another embodiment of the invention, can carry out suitable improvement to MCS combination selection device 400 shown in Figure 4.For example; Can in memory cell 420, store some MCS that is used probably under normal conditions combinations in advance; Then according to the channel quality parameter probability distribution that obtains through statistical analysis of communication system; Therefrom select to be suitable for the M kind MCS combination of this communication system, then it is notified to intrasystem each side as the present available MCS combination of sets of this system.
Though above with SINR and BLER be example combine specific embodiment in accordance with the principles of the present invention, be that method and the device that MCS that communication system is selected to be fit to makes up is described; But; Obviously the present invention is not limited only to described specific embodiment, and those skilled in the art can carry out some suitable modification or change to method step or apparatus structure fully according to actual needs.
In addition; Though more than be in the communication system environment of carrying out the modulation coding mode selection adaptively, the method and apparatus according to the embodiment of the invention to be described; But; It will be appreciated by those skilled in the art that principle of the present invention goes in the communication system of non-self-adapting modulation coding mode selection equally.
Description through above is not difficult to find out; Using according to the method for the embodiment of the invention and/or comprising in the communication system according to the device of the embodiment of the invention; Optimize the design and the selection of MCS combination through the channel quality parameter of statistical analysis system, the distribution of for example SINR; Set many MCS combinations in the higher zone of the distribution probability value of channel quality parameter, and set fewer MCS combination, so that guaranteeing under the constant situation of total MCS combined number in the lower zone of the distribution probability value of channel quality parameter; Suitably change modulation scheme and/or encoding scheme in the MCS combination, thereby can realize the maximization of power system capacity.
In addition; Can be used for confirming when the Communication System Design MCS combination that system's needs are supported according to the MCS combination selection method of the embodiment of the invention and/or device; Be used for revision and/or upgrade existing MCS combination in the time of perhaps also can changing, so that utilize power system capacity as far as possible fully in the configuration of communication system.
In addition, obviously, also can realize with the mode that is stored in the computer executable program in the various machine-readable storage mediums according to each operating process of said method of the present invention.
And; The object of the invention also can be realized through following manner: the storage medium that will store above-mentioned executable program code offers system or equipment directly or indirectly, and the said procedure code is read and carried out to the computer in this system or equipment or CPU (CPU).
At this moment; As long as this system or equipment have the function of executive program, execution mode then of the present invention is not limited to program, and this program also can be a form arbitrarily; For example, the program of target program, interpreter execution perhaps offers the shell script of operating system etc.
Above-mentioned these machinable mediums include but not limited to: various memories and memory cell, semiconductor equipment, disk cell be light, magnetic and magneto optical disk for example, and other is suitable for the medium of stored information etc.
In addition, computer is through being connected to the corresponding website on the internet, and will download and be installed to according to computer program code of the present invention and carry out this program in the computer then, also can realize the present invention.
At last; Also need to prove; Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability; Thereby make to comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as this process, method, article or equipment intrinsic key element.Under the situation that do not having much more more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises said key element and also have other identical element.
Though more than combine accompanying drawing to describe embodiments of the invention in detail, should be understood that top described execution mode just is used to explain the present invention, and be not construed as limiting the invention.For a person skilled in the art, can make various modifications and change to above-mentioned execution mode and do not deviate from essence of the present invention and scope.Therefore, scope of the present invention is only limited appended claim and equivalents thereof.
Claims (32)
1. the method for a Modulation and Coding Scheme combination that select to be fit to for communication system may further comprise the steps:
Channel quality parameter in the communication system is added up, to obtain the probability distribution of this channel quality parameter;
According to the predetermined requirement that the communication system needs satisfy, from said probability distribution, confirm the scope of application of the said channel quality parameter that communication system need be supported;
Mode according to predetermined is confirmed M destination channel mass parameter value in the said scope of application, and wherein, M is natural number and equals the sum that Modulation and Coding Scheme that communication system can support makes up; And
According to the satisfied predetermined requirement of communication system needs; From the combination of all possible modulation scheme and encoding scheme for communication system; Select to reach respectively the M kind Modulation and Coding Scheme combination that M destination channel mass parameter value requires, as the set of the Modulation and Coding Scheme combination that can supply communication system to select for use.
2. method according to claim 1, wherein, the step of the scope of application of said definite channel quality parameter further comprises:
The distribution that from said probability distribution, has the outside expansion channel quality parameter of lighting of maximum probability value makes it to satisfy predetermined condition, and the distribution of the channel quality parameter of this moment is the said scope of application.
3. method according to claim 2; Wherein, With the point that has the maximum probability value in the said probability distribution is the center; Outwards enlarge the distribution of channel quality parameter symmetrically, make the area of the curve regions in this distribution of said probability distribution be not less than system's coverage rate that communication system need satisfy, the distribution of the channel quality parameter of this moment is the said scope of application.
4. method according to claim 1, wherein, the step of said definite M destination channel mass parameter value further comprises:
According to predetermined mode the scope of application of said channel quality parameter is divided into M-1 interval; Make that the Modulation and Coding Scheme combined number that is provided with in the high zone of the distribution probability value of channel quality parameter is many, and the Modulation and Coding Scheme combined number that is provided with in the low zone of the distribution probability value of channel quality parameter is few; And
Confirm the channel quality parameter value of said M-1 interval end points, as said M destination channel mass parameter value.
5. method according to claim 4, wherein, the step of the scope of application of said definite channel quality parameter further comprises:
With the point that has the maximum probability value in the said probability distribution is the center; Outwards enlarge the distribution of channel quality parameter symmetrically; Make the area of the curve regions in this distribution of said probability distribution be not less than system's coverage rate that communication system need satisfy; The distribution of the channel quality parameter of this moment is the said scope of application, and
Wherein, in the step of said definite M destination channel mass parameter value, in such a way the scope of application of said channel quality parameter is carried out interval division and is confirmed said destination channel mass parameter value:
With the point that has the maximum probability value in the said probability distribution is the center; Confirm to be positioned in the middle of the said scope of application, have between the mesozone of siding-to-siding block length L; Outwards successively confirm respectively that from middle two interval end points siding-to-siding block length is i interval of L+i* Δ, wherein i is natural number and 1≤i≤M/2, and L is a positive number; Thereby the said scope of application is divided into M-1 interval
Suppose that the scope of application of said channel quality parameter representes with X～Y, calculate the value of Δ according to following equality (1):
And calculate the channel quality parameter value of said M-1 interval end points based on the Δ value that calculates, as said M destination channel mass parameter value.
6. method according to claim 5, wherein, the value of L is chosen based on the discernmible channel quality parameter scope of communication system.
7. method according to claim 1, wherein, the step of said selection M kind Modulation and Coding Scheme combination further comprises:
For each combination in the combination of all possible modulation scheme and encoding scheme; Confirm in communication system to use under the situation of this kind combination the channel quality parameter value when reaching predetermined transmission requirement through system emulation, as the pairing channel quality parameter value of this kind combination;
From the combination of all possible modulation scheme and encoding scheme; Select the corresponding channel quality parameter value to equate with said M destination channel mass parameter value respectively or the most approaching with it M kind combination, selected M kind combination is the M kind Modulation and Coding Scheme combination that the said M of reaching a destination channel mass parameter value requires.
8. method according to claim 7, wherein, said scheduled transmission requirement is: transmitted error rate is not higher than predetermined threshold value.
9. method according to claim 8, wherein, said transmitted error rate is block error rate BLER, error rate BER or FER FER.
10. method according to claim 7; Wherein, Store multiple Modulation and Coding Scheme commonly used combination in advance, and in the step of said selection M kind Modulation and Coding Scheme combination, preferentially from the Modulation and Coding Scheme combination commonly used of said storage, select to reach the Modulation and Coding Scheme combination that M destination channel mass parameter value requires.
11. according to any described method in the claim 1 to 10, wherein, said method is carried out when the design of communications system, and wherein in said statistic procedure, obtains the statistics of the channel quality parameter of communication system through system emulation.
12. according to any described method in the claim 1 to 10, wherein, said method is carried out when arranging communication system, and wherein in said statistic procedure, passes through the statistics that actual drive test obtains the channel quality parameter of communication system.
13. according to any described method in the claim 1 to 10, wherein, said channel quality parameter is recipient's in the communication system Signal to Interference plus Noise Ratio SINR or a signal to noise ratio snr.
14. according to any described method in the claim 1 to 10, wherein, M is 2 integral number power.
15. according to any described method in the claim 1 to 10, the Modulation and Coding Scheme of selecting to be fit to applicable to the communication system of selecting modulation coding mode for the communication system of selecting modulation coding mode adaptively or non-self-adapting ground makes up.
16. one kind is used to the device that communication system is selected suitable Modulation and Coding Scheme combination, comprises:
The parametric statistics unit is used for the channel quality parameter of communication system is added up, to obtain the probability distribution of this channel quality parameter;
Memory cell is used for the various predetermined requirement that the storing communication system need satisfy, and the various modulation schemes and the encoding scheme that can supply communication system to select;
The target component value is confirmed the unit; Be used for according to the satisfied predetermined requirement of communication system needs; From said probability distribution, confirm the scope of application of the said channel quality parameter that communication system need be supported; And confirm M destination channel mass parameter value in the said scope of application according to predetermined mode, wherein, M is natural number and equals the sum that Modulation and Coding Scheme that communication system can support makes up; And
Selected cell; Be used for according to the satisfied predetermined requirement of communication system needs; From the combination of all possible modulation scheme and encoding scheme for communication system; Select to reach respectively the M kind Modulation and Coding Scheme combination that M destination channel mass parameter value requires, as the set of the Modulation and Coding Scheme combination that can supply communication system to select for use.
17. device according to claim 16, wherein,
Said target component value confirms that the unit has the distribution of the outside expansion channel quality parameter of lighting of maximum probability value from said probability distribution; Make it to satisfy predetermined condition, and the distribution of channel quality parameter is at this moment confirmed as the said scope of application.
18. device according to claim 17, wherein,
Said target component value confirms that the unit is the center with the point that has the maximum probability value in the said probability distribution; Outwards enlarge the distribution of channel quality parameter symmetrically; Make the area of the curve regions in this distribution of said probability distribution be not less than system's coverage rate that communication system need satisfy, and the distribution of channel quality parameter that will this moment is confirmed as the said scope of application.
19. device according to claim 16, wherein, said target component value confirms that the unit accordings to following manner and confirm said M destination channel mass parameter value:
According to predetermined mode the scope of application of said channel quality parameter is divided into M-1 interval; Make that the Modulation and Coding Scheme combined number that is provided with in the high zone of the distribution probability value of channel quality parameter is many, and the Modulation and Coding Scheme combined number that is provided with in the low zone of the distribution probability value of channel quality parameter is few; And
Confirm the channel quality parameter value of said M-1 interval end points, as said M destination channel mass parameter value.
20. device according to claim 19, wherein,
Said target component value confirms that the unit is the center with the point that has the maximum probability value in the said probability distribution; Outwards enlarge the distribution of channel quality parameter symmetrically; Make the area of the curve regions in this distribution of said probability distribution be not less than system's coverage rate that communication system need satisfy; And the distribution of channel quality parameter that will this moment confirms as the scope of application of said channel quality parameter, and
Said target component value confirms that the unit carries out interval division and confirms said destination channel mass parameter value the scope of application of said channel quality parameter in such a way:
With the point that has the maximum probability value in the said probability distribution is the center; Confirm to be positioned in the middle of the said scope of application, have between the mesozone of siding-to-siding block length L; Outwards successively confirm respectively that from middle two interval end points siding-to-siding block length is i interval of L+i* Δ, wherein i is natural number and 1≤i≤M/2, and L is a positive number; Thereby the said scope of application is divided into M-1 interval
Suppose that the scope of application of said channel quality parameter representes with X～Y, calculate the value of Δ according to following equality (1):
And calculate the channel quality parameter value of said M-1 interval end points based on the Δ value that calculates, as said M destination channel mass parameter value.
21. device according to claim 20, wherein, the value of L is chosen based on the discernmible channel quality parameter scope of communication system.
22. device according to claim 16, wherein, said selected cell is selected said M kind Modulation and Coding Scheme combination according to following manner:
For each combination in the combination of all possible modulation scheme and encoding scheme; Confirm in communication system to use under the situation of this kind combination the channel quality parameter value when reaching predetermined transmission requirement through system emulation, as the pairing channel quality parameter value of this kind combination;
From the combination of all possible modulation scheme and encoding scheme; Select the corresponding channel quality parameter value to equate with said M destination channel mass parameter value respectively or the most approaching with it M kind combination, selected M kind combination is the M kind Modulation and Coding Scheme combination that the said M of reaching a destination channel mass parameter value requires.
23. device according to claim 22, wherein, said scheduled transmission requirement is: transmitted error rate is not higher than predetermined threshold value.
24. device according to claim 23, wherein, said transmitted error rate is block error rate BLER, error rate BER or FER FER.
25. device according to claim 22; Wherein, Store multiple Modulation and Coding Scheme commonly used combination in the said memory cell in advance, and said selected cell preferentially selects to reach the Modulation and Coding Scheme combination that M destination channel mass parameter value requires from the Modulation and Coding Scheme combination commonly used of said storage.
26. according to any described device in the claim 16 to 25, wherein, said device uses when the design of communications system, and wherein said parametric statistics unit obtains the statistics of the channel quality parameter of communication system through system emulation.
27. according to any described device in the claim 16 to 25, wherein, said device uses when arranging communication system, and wherein said parametric statistics unit obtains the statistics of the channel quality parameter of communication system through actual drive test.
28. according to any described device in the claim 16 to 25, wherein, said channel quality parameter is recipient's in the communication system Signal to Interference plus Noise Ratio SINR or a signal to noise ratio snr.
29. according to any described device in the claim 16 to 25, wherein, M is 2 integral number power.
30. according to any described device in the claim 16 to 25, the Modulation and Coding Scheme of selecting to be fit to applicable to the communication system of selecting modulation coding mode for the communication system of selecting modulation coding mode adaptively or non-self-adapting ground makes up.
31. a communication system comprises:
Like any described device in the claim 16 to 29, be used to communication system and select suitable Modulation and Coding Scheme combination; And
Notifying device is used for giving the receiving-transmitting sides of communication system with the set of the Modulation and Coding Scheme of said selection combination as the Modulation and Coding Scheme combination notice of communication system, uses when intercoming mutually between the receiving-transmitting sides.
32. communication system according to claim 31, wherein, said communication system is to select the communication system of modulation coding mode or the communication system that modulation coding mode is selected on non-self-adapting ground adaptively.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101614804A CN101686098B (en) | 2008-09-27 | 2008-09-27 | Method and device for selecting modulation and coding scheme combination, and communication system |
| JP2009198374A JP5493598B2 (en) | 2008-09-27 | 2009-08-28 | Method, apparatus and communication system for selecting a combination of modulation and coding scheme |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101614804A CN101686098B (en) | 2008-09-27 | 2008-09-27 | Method and device for selecting modulation and coding scheme combination, and communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101686098A CN101686098A (en) | 2010-03-31 |
| CN101686098B true CN101686098B (en) | 2012-11-21 |
Family
ID=42049089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101614804A Expired - Fee Related CN101686098B (en) | 2008-09-27 | 2008-09-27 | Method and device for selecting modulation and coding scheme combination, and communication system |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5493598B2 (en) |
| CN (1) | CN101686098B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102959888B (en) * | 2011-06-27 | 2015-06-17 | 华为技术有限公司 | Method and apparatus for implementing uplink data transmission |
| US8903327B2 (en) * | 2011-09-15 | 2014-12-02 | Qualcomm Incorporated | Channel quality reporting using a dynamically adjusted measurement power offset |
| JP5524277B2 (en) * | 2012-05-29 | 2014-06-18 | アンリツ株式会社 | Signal processing apparatus and signal processing method |
| US9185661B2 (en) * | 2012-06-04 | 2015-11-10 | Nokia Solutions And Networks Oy | Performing power control based on nominal packet size |
| CN103385018B (en) * | 2012-12-03 | 2018-02-02 | 华为技术有限公司 | Network simulation method and server |
| EP2787670A1 (en) * | 2013-04-05 | 2014-10-08 | Panasonic Intellectual Property Corporation of America | MCS table adaptation for 256-QAM |
| WO2019095426A1 (en) | 2017-11-17 | 2019-05-23 | 华为技术有限公司 | Information processing method and wireless transmission device |
| CN109802756A (en) * | 2017-11-17 | 2019-05-24 | 华为技术有限公司 | Information processing method and radio transmission apparatus |
| WO2019173957A1 (en) * | 2018-03-13 | 2019-09-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and network node, for handling link adaption of a channel |
| CN109032619B (en) * | 2018-07-13 | 2021-12-24 | 上海艾为电子技术股份有限公司 | Method and device for determining fuse burning code |
| CN113037363B (en) * | 2019-01-23 | 2022-07-15 | 湖南航星瀚宇空间科技有限公司 | Communication system |
| EP3966972B1 (en) * | 2019-05-10 | 2024-07-03 | Telefonaktiebolaget LM Ericsson (publ) | Method and network device for link adaptation using ack and nack feedback statistics |
| CN110430020A (en) * | 2019-08-07 | 2019-11-08 | 北京运安智维科技有限公司 | The method of adaptive polo placement colony dispatching MCS based on CQI statistical information |
| CN112929980A (en) * | 2019-12-06 | 2021-06-08 | 中兴通讯股份有限公司 | Initial MCS value determination method, electronic device and storage medium |
| CN112910537B (en) * | 2020-11-13 | 2022-09-27 | 中国空间技术研究院 | Method and device for determining satellite communication adaptive coding modulation mode |
| CN115001625B (en) * | 2022-05-12 | 2024-06-11 | Oppo广东移动通信有限公司 | Information transmission method, information transmission device, storage medium and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6072990A (en) * | 1997-05-08 | 2000-06-06 | Lucent Technologies, Inc. | Transmitter-receiver pair for wireless network power-code operating point is determined based on error rate |
| CN101091331A (en) * | 2004-10-29 | 2007-12-19 | 艾利森电话股份有限公司 | Method and arrangement for mutual information based power control |
| CN101615974A (en) * | 2008-06-27 | 2009-12-30 | 富士通株式会社 | The method for designing and the device that are used for the modulation code set of communication system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2679413B2 (en) * | 1990-12-20 | 1997-11-19 | 日本電気株式会社 | Channel allocation method for mobile communication system |
| JP3014308B2 (en) * | 1994-10-24 | 2000-02-28 | エヌ・ティ・ティ移動通信網株式会社 | Transmission power control method in mobile communication system |
| JP2005057710A (en) * | 2003-08-07 | 2005-03-03 | Matsushita Electric Ind Co Ltd | Communication terminal device and base station device |
| US7809336B2 (en) * | 2005-03-07 | 2010-10-05 | Qualcomm Incorporated | Rate selection for a quasi-orthogonal communication system |
| JP4731991B2 (en) * | 2005-05-16 | 2011-07-27 | パナソニック株式会社 | Multi-carrier communication apparatus and multi-carrier communication method |
| CN101502163B (en) * | 2006-08-09 | 2013-06-19 | 皇家飞利浦电子股份有限公司 | Radio communication station and radio communication device, and methods of operating same |
| USRE47489E1 (en) * | 2006-08-29 | 2019-07-02 | Sharp Kabushiki Kaisha | Mobile communication system, mobile station apparatus, base station apparatus and random access channel transmitting method |
| EP2846478A1 (en) * | 2006-11-30 | 2015-03-11 | Fujitsu Limited | Base station device and mobile terminal |
| KR20080073196A (en) * | 2007-02-05 | 2008-08-08 | 엘지전자 주식회사 | Method for efficiently transmitting channel quality information in mimo system |
-
2008
- 2008-09-27 CN CN2008101614804A patent/CN101686098B/en not_active Expired - Fee Related
-
2009
- 2009-08-28 JP JP2009198374A patent/JP5493598B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6072990A (en) * | 1997-05-08 | 2000-06-06 | Lucent Technologies, Inc. | Transmitter-receiver pair for wireless network power-code operating point is determined based on error rate |
| CN101091331A (en) * | 2004-10-29 | 2007-12-19 | 艾利森电话股份有限公司 | Method and arrangement for mutual information based power control |
| CN101615974A (en) * | 2008-06-27 | 2009-12-30 | 富士通株式会社 | The method for designing and the device that are used for the modulation code set of communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5493598B2 (en) | 2014-05-14 |
| JP2010081594A (en) | 2010-04-08 |
| CN101686098A (en) | 2010-03-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101686098B (en) | Method and device for selecting modulation and coding scheme combination, and communication system | |
| CN101615974B (en) | Method and device for designing modulation code set for communication system | |
| US10887150B2 (en) | Method and apparatus for data transmission in a multiuser downlink cellular system | |
| US9831982B2 (en) | Method and radio node for enabling use of high order modulation in a radio communication with a user equipment | |
| US9025430B2 (en) | System and method of modulation and coding scheme adjustment for a LTE shared data channel | |
| CN103095415B (en) | Carry out the method and system of PDCCH blind decoding in mobile communications | |
| CN101388744B (en) | Adaptive encoding modulation method | |
| EP2811676A1 (en) | Information transmission method and device | |
| JP2018531545A6 (en) | CQI information receiving method, transmitting method, receiving apparatus, and transmitting apparatus | |
| CN101091328B (en) | Control channel transmission method, base station and terminal | |
| EP2545668B1 (en) | Rate adaptation for sdma | |
| KR20180074691A (en) | CQI information receiving method, transmission method, receiving device and transmitting device | |
| CN104094546B (en) | Selected based on the redundancy versions of the quality of reception and transformat | |
| CN111769902B (en) | Method for transmitting channel state information, user equipment and base station | |
| CN104509012A (en) | Communication method, base station and user equipment | |
| CN101682467A (en) | Adaptive Modulation in the wireless network | |
| JP2006345363A (en) | Wireless communication device and wireless communication method | |
| CN105766021A (en) | Terminal device and base station device | |
| CN101568145B (en) | LTE system CQI reporting implementation method | |
| CN103548286A (en) | Method and base station for power allocation in wireless system | |
| Peng et al. | Non-cooperative power control game for adaptive modulation and coding | |
| Torrea-Duran et al. | A cross-layer approach to save energy in 3GPP-LTE terminals | |
| Bouida et al. | Adaptive transmission schemes for MISO spectrum sharing systems | |
| WO2006046895A1 (en) | Method and arrangement for power resource allocation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20200927 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |