CN104243086B - Modulation and Coding Scheme determines method, base station and communication system - Google Patents
Modulation and Coding Scheme determines method, base station and communication system Download PDFInfo
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Abstract
The present invention provides a kind of Modulation and Coding Scheme and determines method, base station and communication system.Wherein, the method includes：Obtain Modulation and Coding Scheme exponent number；According to Modulation and Coding Scheme exponent number and the resource block size of distribution, order of modulation and transport block size are obtained；In one cycle, according to the resource block size of the distribution, the order of modulation and the transport block size calculate code check；If the code check is less than or equal to default maximal rate, the Modulation and Coding Scheme is determined as the scheme for including the corresponding modulation system of the order of modulation and the transport block size；If the code check is more than default maximal rate, and the order of modulation is less than default maximum modulation exponent number, then increases the order of modulation, and the order of modulation is updated to the order of modulation after increase, and enter and recycle next time.The embodiment of the present invention can effectively improve the Mean Speed of communication system.
Description
Technical field
The present invention relates to the communication technologys more particularly to a kind of Modulation and Coding Scheme to determine method, base station and communication system.
Background technology
In existing 3GPP（The3rd Generation Partnership Project, third generation affiliate meter
It draws）LTE（Long Term Evolution, long term evolution plan）In agreement, PDSCH（Physical Downlink Shared
Channel, Physical Downlink Shared Channel）Total defines three kinds of modulation systems：QPSK, 16QAM and 64QAM, each of which tune
Symbol processed carries 2,4 and 6 bits respectively, and 2,4 and 6 be the corresponding order of modulation of various modulation systems（Modulation
Order）.Meanwhile for PDCCH（Physical Downlink Control Channel, Physical Downlink Control Channel）Scheduling
When signaling simplify, agreement respectively defines 32 rank MCS again（Modulation Coding Scheme, coded modulation scheme）,
MCS exponent numbers correspond to a specific MCS, and MCS includes the corresponding modulation system of coded modulation scheme exponent number and TBS
（Transport Block Size, transport block size）.In 32 rank MCS, preceding MCS0~MCS28 amounts to 29 rank MCS for just
It passes；MCS29~MCS31 amounts to 3 rank MCS and is used for HARQ（Hybrid Automatic Repeat Request mix automatic weight
Pass request）It retransmits.
In the prior art, eNB（Evolved Node B, evolved base station）Dispatching the mode of generally use is：ENB is first
The code check of PDSCH is calculated, is scheduled if code check is less than default maximal rate according to the corresponding MCS of current exponent number；If
Code check is more than default maximal rate, then the exponent number of MCS is reduced, and continues to calculate code check, if the code check is still above maximum
Code check then continues to reduce the exponent number of MCS, until code check drops below default maximal rate.
The exponent number reduction of MCS means that TBS becomes smaller or TBS and order of modulation become smaller simultaneously.It can correctly be examined in terminal
In the case of survey, the throughput of the bigger cells of TBS is higher.12 RB are dispatched with PDSCH（Resource Block, resource block）
For calculate, just pass top step number MCS it is higher than the throughput of the MCS of secondary high exponent number by about 17%（TBSMCS=28=8760, TBSMCS=27=
7480, then (8760-7480)/7480=17.11%）.Similarly, in the case where terminal can be detected correctly, order of modulation is got over
Height, the bit number that base station uses each modulation symbol included in the modulated data of the order of modulation to carry is more, so as to small
The throughput in area is also higher.This side for reducing MCS exponent numbers simply when code check is more than default maximal rate of the prior art
Method, base station even if PDCCH occupy resource it is more when limitation based on maximal rate can only reduce TBS or reduce tune simultaneously
Exponent number and TBS processed, cause the throughput of cell to reduce, so as to influence the Mean Speed of communication system.
Invention content
The many aspects of the present invention provide a kind of Modulation and Coding Scheme and determine method, base station and communication system, are gulped down with improving
Spit rate.
The first aspect of the invention provides a kind of Modulation and Coding Scheme and determines method, including：
Obtain Modulation and Coding Scheme exponent number；
According to Modulation and Coding Scheme exponent number and the resource block size of distribution, order of modulation and transport block size are obtained；
In one cycle, according to the resource block size, the order of modulation and the transport block size calculate code
Rate；
If the code check is less than or equal to default maximal rate, the Modulation and Coding Scheme is determined as including the modulation
The scheme of the corresponding modulation system of exponent number and the transport block size；
If the code check is more than default maximal rate, and the order of modulation is less than default maximum modulation exponent number, then increases
The order of modulation is updated to the order of modulation after increase, and enter and recycle next time by the order of modulation.
Modulation and Coding Scheme with reference to described in the first aspect of the present invention determines method, in the first possible realization method,
The increase order of modulation, including：
Obtain the first preset value；
The order of modulation is increased into first preset value.
Modulation and Coding Scheme with reference to described in the first aspect of the present invention or the first possible realization method determines method, the
In two kinds of possible realization methods, the acquisition Modulation and Coding Scheme exponent number, including：
Receive the channel quality indication (CQI) information that terminal reports；
According to the channel quality indication (CQI) information, the Modulation and Coding Scheme exponent number is determined.
With reference to the tune described in the possible realization method of the first aspect of the present invention, the first possible realization method or second
Encoding scheme processed determines method, in the third possible realization method, the resource block size according to distribution, and the order of modulation
With the transport block size, after calculating code check, further include：
If the code check is more than the default maximal rate, and the order of modulation is equal to the default maximum modulation rank
Number, then reduce the Modulation and Coding Scheme exponent number, according to the Modulation and Coding Scheme exponent number after reduction and the resource block size, obtain
Go out order of modulation and transport block size, and enter and recycle next time.
Modulation and Coding Scheme with reference to described in the third possible realization method determines method, the 4th kind of possible realization method
In, it is described to reduce the Modulation and Coding Scheme exponent number, including：
Obtain the second preset value；
The Modulation and Coding Scheme exponent number is reduced into second preset value.
With reference to the first aspect of the present invention, the first to described in any one possible realization method in the 4th kind modulation compile
Code scheme determines method, and in the 5th kind of possible realization method, the resource block according to Modulation and Coding Scheme exponent number and distribution is big
It is small, order of modulation and transport block size are obtained, including：
According to preset Modulation and Coding Scheme exponent number and the correspondence of order of modulation, the Modulation and Coding Scheme rank is obtained
The corresponding order of modulation of number；
According to the correspondence of preset Modulation and Coding Scheme exponent number, resource block size and transport block size, described in acquisition
Modulation and Coding Scheme exponent number and the corresponding transport block size of the resource block size.
The second aspect of the invention provides a kind of base station, including：
Acquisition module, for obtaining Modulation and Coding Scheme exponent number；
First processing module for the resource block size according to Modulation and Coding Scheme exponent number and distribution, obtains order of modulation
And transport block size；
Second processing module, in one cycle, according to the resource block size, the order of modulation and the biography
Defeated block size calculates code check；If the code check is less than or equal to default maximal rate, the Modulation and Coding Scheme is determined as wrapping
Include the scheme of the corresponding modulation system of the order of modulation and the transport block size；If the code check is more than default maximum code
Rate, and the order of modulation is less than default maximum modulation exponent number, then increases the order of modulation, the order of modulation is updated to
Order of modulation after increase, and enter and recycle next time.
Base station with reference to described in the second aspect of the invention, in the first possible realization method, the second processing mould
Block is specifically used for obtaining the first preset value, and the order of modulation is increased by first preset value.
With reference to the base station described in the second aspect of the invention or the first possible realization method, second may realization side
In formula, first acquisition module, including：
Receiving unit, for receiving the channel quality indication (CQI) information that terminal reports；
Computing unit, for according to the channel quality indication (CQI) information, determining the Modulation and Coding Scheme exponent number.
With reference to the base described in the possible realization method of the second aspect of the invention, the first possible realization method or second
It stands, in the third possible realization method, the Second processing module is additionally operable to：When the code check is more than the default maximum code
Rate, and the order of modulation be equal to the default maximum modulation exponent number when, the Modulation and Coding Scheme exponent number is reduced, according to reduction
Modulation and Coding Scheme exponent number afterwards and the resource block size obtain order of modulation and transport block size, and enter and follow next time
Ring.
With reference to the base station described in the third possible realization method, in the 4th kind of possible realization method, the second processing mould
Block is specifically used for：The second preset value is obtained, the Modulation and Coding Scheme exponent number is reduced into second preset value.
With reference to the second aspect of the invention, the first to the base station described in any possible realization method in the 4th kind,
In five kinds of possible realization methods, the first processing module includes：
First acquisition unit for the correspondence according to preset Modulation and Coding Scheme exponent number and order of modulation, obtains
The corresponding order of modulation of the Modulation and Coding Scheme exponent number；
Second acquisition unit, for according to preset Modulation and Coding Scheme exponent number, resource block size and transport block size
Correspondence obtains the Modulation and Coding Scheme exponent number and the corresponding transport block size of the resource block size.
The third aspect of the invention provides a kind of communication system, including：Base station and terminal, wherein, the base station is used for
Obtain Modulation and Coding Scheme exponent number；According to Modulation and Coding Scheme exponent number and the resource block size of distribution, order of modulation and biography are obtained
Defeated block size；In one cycle, according to the resource block size, the order of modulation and the transport block size calculate code
Rate；If the code check is less than or equal to default maximal rate, the Modulation and Coding Scheme is determined as including the order of modulation
The scheme of corresponding modulation system and the transport block size；If the code check is more than default maximal rate, and the modulation order
Number is less than default maximum modulation exponent number, then increases the order of modulation, and the order of modulation is updated to the modulation order after increase
Number, and enter and recycle next time.
As shown from the above technical solution, the embodiment of the present invention first determines whether to modulate when code check is more than default maximal rate
Exponent number when the order of modulation is less than default maximum modulation exponent number, increases the order of modulation, is compiled without directly reducing modulation
Code scheme exponent number, avoids the prior art from reducing Modulation and Coding Scheme exponent number simply when code check is more than default maximal rate and leads
The problem of cell throughput of cause reduces so that base station PDCCH occupy resource it is more when, under the limitation of default maximal rate
The corresponding modulation system of maximum modulation exponent number that determining Modulation and Coding Scheme selection may dispatch, can effectively improve cell
Throughput, and then improve the Mean Speed of communication system.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the flow diagram that the Modulation and Coding Scheme that the embodiment of the present invention one provides determines method；
Fig. 2 is the flow diagram that Modulation and Coding Scheme provided by Embodiment 2 of the present invention determines method；
Fig. 3 is the flow diagram that the Modulation and Coding Scheme that the embodiment of the present invention three provides determines method；
Fig. 4 is the structure diagram of base station that the embodiment of the present invention four provides；
Fig. 5 is the structure diagram of communication system that the embodiment of the present invention five provides.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiments obtained without creative efforts shall fall within the protection scope of the present invention.
As shown in Figure 1, the Modulation and Coding Scheme that the embodiment of the present invention one provides determines the flow diagram of method.This implementation
Method described in example one, including：
Step 101 obtains Modulation and Coding Scheme（Modulation Coding Scheme, hereinafter referred to as MCS）Exponent number.
Specifically, base station receives the channel quality instruction that terminal reports（Channel Quality Indication, below
Abbreviation CQI）Information.Then, the base station determines the MCS exponent numbers according to the CQI information.
Step 102, the resource block size according to MCS exponent numbers and distribution, obtain order of modulation and TBS.
Specifically, base station is assigned with RB number of running time-frequency resource for each user terminal, i.e., big given available resource block
It is small.The resource block size of the resource block size distributed described in this step, as base station distribution.Wherein, base station is pre-stored with MCS
Exponent number and the correspondence and MCS exponent numbers of order of modulation, the correspondence of resource block size and TBS.The base station is according to institute
MCS exponent numbers and the correspondence of order of modulation are stated, obtains the corresponding order of modulation of the MCS exponent numbers；According to the MCS exponent numbers,
The correspondence of resource block size and TBS obtains the MCS exponent numbers and the corresponding TBS of resource block size of base station distribution.Specifically
Ground, in practical applications, the correspondence of the MCS exponent numbers and order of modulation may be characterized as list as shown in table 1 below.Table 1
Show MCS exponent numbers, order of modulation and TBS indexes（Index）Correspondence list a specific example.
Table 1 is MCS exponent numbers, order of modulation（Modulation Order）With the correspondence of TBS Index
Correspondence shown in above-mentioned table 1 be for convenience understand and include a MCS exponent number, order of modulation and
The correspondence of TBS Index, but the embodiment of the present invention is not limited to that.Each MCS exponent numbers and order of modulation correspond in upper table
TBS employ index（Index）It shows schematically, different resource block sizes is distributed in base station, which corresponds to
Different TBS values, pass through the correspondence list of MCS exponent numbers, resource block size, TBS indexes and TBS in practical applications
To represent.Base station, can be by inquiring MCS exponent numbers, money after order of modulation and TBS Index is got by inquiring above-mentioned table 1
The correspondence list of source block size, TBS indexes and TBS, to obtain the resource block size of current base station distribution, MCS exponent numbers
The corresponding TBS with TBS indexes.Wherein, the correspondence list of the MCS exponent numbers, resource block size, TBS indexes and TBS exist
It is not listed specifically in the present embodiment, list related of the prior art can be used directly.
Step 103, in one cycle, according to the resource block size, the order of modulation and the transport block size,
Calculate code check.
Specifically, base station is being assigned with RB number of running time-frequency resource for each user terminal, i.e., given available resources block size,
Later, the CQI reported by terminal determines MCS exponent numbers, and MSC exponent numbers correspond to a specific MCS, this makes it possible to according to above-mentioned step
Rapid 101 and 102 determine the order of modulation and TBS of the user.Then, the base station is big according to the resource block for distributing to the terminal
Small, described order of modulation and the TBS calculate code check.The mode that the base station calculates code check is that original data source information adds
TB（Transport Block, transmission block）CRC（Cyclic Redundancy Check, cyclic redundancy check code）Length and
The CRC length of CB divided by the running time-frequency resource of the terminal is pre-assigned under the corresponding modulation system of the order of modulation institute
The total bit number that can be transmitted.From code check calculation it is found that in the case where TBS and resource block size are determined, order of modulation with
Code check is in inversely prroportional relationship.One timing of running time-frequency resource of terminal, order of modulation increase, code check meeting are distributed in TBS and base station
It reduces.
If step 104, the code check are less than or equal to default maximal rate, the Modulation and Coding Scheme is determined as including
The scheme of the corresponding modulation system of order of modulation and the TBS.
Specifically, the default maximal rate can be 0.93.
If step 105, the code check are more than default maximal rate, and the order of modulation is less than default maximum modulation rank
Number, then increase the order of modulation, and the order of modulation is updated to the order of modulation after increase, and enter and recycle next time.
Specifically, recycled next time as the cycle that execution step 103~105 are formed again described in this step
In.Wherein, following steps realization can be used in the increase order of modulation described in this step：Base station obtains the first preset value；So
Afterwards, the order of modulation is increased into first preset value.Wherein, first preset value can be specially 2.
It is illustrated with the example shown in above-mentioned table 1, maximum modulation exponent number is 6 in table 1.Assuming that the MCS that base station is got
Exponent number is 7, and it is 2 that corresponding order of modulation when the MCS exponent numbers are 7 can be got from table 1, and from preset MCS exponent numbers,
The correspondence of resource block size and TBS obtains the MCS exponent numbers and the corresponding TBS of resource block size of base station distribution.If base
It stands and maximal rate 0.93 is more than according to the code check that the resource block size, the order of modulation and TBS of distribution are calculated, then institute
It states base station and first determines whether the order of modulation is less than default maximum modulation exponent number.If the default maximum modulation exponent number is 6,
Then by judging to show that the order of modulation 2 is less than 6, then the base station increases the order of modulation, that is, 4 is increased to, by institute
It states order of modulation and is updated to 4, subsequently into subsequent cycle until the code check being calculated is less than maximal rate 0.93.
The present embodiment first determines whether order of modulation, when the order of modulation is less than when code check is more than default maximal rate
During default maximum modulation exponent number, increase the order of modulation, without directly reducing Modulation and Coding Scheme exponent number, avoid the prior art
Reduce that base station throughput caused by Modulation and Coding Scheme exponent number reduces simply when code check is more than default maximal rate asks
Topic, so that the Modulation and Coding Scheme selection that base station when PDCCH occupancy resources are more, determines under the limitation of default maximal rate
The corresponding modulation system of maximum modulation exponent number that may be dispatched, can effectively improve the throughput of cell, and then improve communication
The Mean Speed of system.
As shown in Fig. 2, the Modulation and Coding Scheme provided by Embodiment 2 of the present invention determines the flow diagram of method.Such as
Shown in Fig. 2, the present embodiment two is based on above-described embodiment one, in one step 103 of above-described embodiment, in one cycle, according to
The resource block size of distribution, the order of modulation and the transport block size calculate code check and further include later：
If step 106, the code check are more than the default maximal rate, and the order of modulation is equal to the default maximum
Order of modulation then reduces the Modulation and Coding Scheme exponent number, according to the Modulation and Coding Scheme exponent number after reduction and the resource block
Size obtains order of modulation and transport block size, and enters and recycle next time.
Specifically, recycled next time as the cycle that execution step 103~106 are formed again described in this step
In.Wherein, the Modulation and Coding Scheme exponent number is reduced described in this step, following steps realization can be used：It is pre- that base station obtains second
If value, then, the Modulation and Coding Scheme exponent number is reduced into second preset value.Wherein, second preset value can be
1。
The feelings that the present embodiment cannot be dispatched by the corresponding modulation system of high order modulation exponent number that can be selected in base station
Under condition, MCS exponent numbers are just reduced.It should be noted that：After the present embodiment even reduces MCS exponent numbers, after also directly not reducing
The corresponding MCS of MCS exponent numbers as finally determining MCS, but step 103~106 are further performed, so that base station can
Under the limitation of maximal rate, maximum order of modulation and maximum TBS are dispatched, to improve the throughput of cell.
As shown in figure 3, the Modulation and Coding Scheme that the embodiment of the present invention three provides determines the flow diagram of method.This
Embodiment two the method includes：
Step 201, base station receive the CQI information that terminal reports.
Step 202, the base station determine the Modulation and Coding Scheme exponent number MCS_Iint according to the CQI information.
Step 203, the base station obtain order of modulation and TBS according to MCS exponent numbers and the resource block size of distribution.
Specifically, base station obtains the MCS exponent numbers and corresponds to according to preset MCS exponent numbers and the correspondence of order of modulation
Order of modulation；According to the correspondence of preset MCS exponent numbers, resource block size and TBS, MCS exponent numbers and described are obtained
The corresponding TBS of resource block size.
Step 204, the base station according to the resource block size for distributing to the terminal, the order of modulation and the TBS,
Calculate code check.
Step 205, the base station judge whether the code check is more than 0.93, if so, entering step 206；Otherwise, it is described
Modulation and Coding Scheme is determined as including the corresponding modulation system of the order of modulation and the scheme of the TBS.
Step 206, the base station judge whether the order of modulation is less than default maximum modulation exponent number, if so, into
Step 207；Otherwise, 208 are entered step.
Step 207, the base station increase the order of modulation, then the order of modulation is updated to the modulation after increase
Exponent number, and return to step 204.
Specifically, such as order of modulation is 2, increases by 2, and the order of modulation after increase is 4, then by the order of modulation more
New is 4.
Step 208, the base station reduce the MCS_Iint, and the MCS_Iint is updated to the MCS_ after reducing
Iint is then back to step 203.
Specifically, such as MCS_Iint is 7, reduces by 1, and the MCS_Iint after reduction is 6, then by the MCS_Iint more
New is 6.
It can be seen that from above-mentioned each method embodiment when code check is more than default maximal rate, if base station is compiled according to modulation
The corresponding order of modulation that code scheme exponent number is got is less than default maximum modulation exponent number, then increases the Modulation and Coding Scheme rank
Order of modulation in the corresponding Modulation and Coding Scheme of number, can effectively improve the throughput of cell, and then improve communication system
Mean Speed.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Aforementioned program can be stored in a computer read/write memory medium.The journey
Sequence when being executed, performs the step of including above-mentioned each method embodiment；And aforementioned storage medium includes：ROM, RAM, magnetic disc or
The various media that can store program code such as person's CD.
It should be noted that：For aforementioned each method embodiment, in order to be briefly described, therefore it is all expressed as a series of
Combination of actions, but those skilled in the art should know, the present invention is not limited by described sequence of movement because
According to the present invention, certain steps may be used other sequences or be carried out at the same time.Secondly, those skilled in the art should also know
It knows, embodiment described in this description belongs to preferred embodiment, and involved action and module are not necessarily of the invention
It is necessary.
As shown in figure 4, the structure diagram for the base station that the embodiment of the present invention four provides.Base station packet described in the present embodiment four
It includes：Acquisition module 1, first processing module 2 and Second processing module 3.Wherein, the acquisition module 1 is used to obtain modulating-coding
Scheme exponent number.The first processing module 2 is used for the resource block size according to Modulation and Coding Scheme exponent number and distribution, is modulated
Exponent number and transport block size.The Second processing module 3 is used in one cycle, according to the resource block size, the tune
Exponent number processed and the transport block size calculate code check；If the code check is less than or equal to default maximal rate, the modulation is compiled
Code scheme is determined as the scheme for including the corresponding modulation system of the order of modulation and the transport block size；If the code check is big
In default maximal rate, and the order of modulation is less than default maximum modulation exponent number, then increases the order of modulation, by the tune
Exponent number processed is updated to the order of modulation after increase, and enters and recycle next time.Base station described in the present embodiment can be realized above-mentioned each
The Modulation and Coding Scheme that embodiment of the method is provided determines method, and concrete implementation process can be found in above method embodiment
Related content, details are not described herein again.
The present embodiment base station first determines whether order of modulation, when the order of modulation when code check is more than default maximal rate
During less than default maximum modulation exponent number, increase the order of modulation, without directly reducing Modulation and Coding Scheme exponent number, avoid existing
Base station throughput reduces caused by technology reduces Modulation and Coding Scheme exponent number when code check is more than default maximal rate simply
The problem of, so that the Modulation and Coding Scheme that base station when PDCCH occupancy resources are more, determines under the limitation of default maximal rate
The corresponding modulation system of maximum modulation exponent number that may be dispatched is selected, can effectively improve the throughput of cell, and then improve
The Mean Speed of communication system.
Wherein, the Second processing module described in above-described embodiment is specifically used for obtaining the first preset value, by the modulation
Exponent number increases by first preset value.
Still further, the Second processing module described in above-described embodiment is additionally operable to：When the code check is more than described pre-
If maximal rate, and the order of modulation be equal to the default maximum modulation exponent number when, reduce the Modulation and Coding Scheme exponent number,
According to the Modulation and Coding Scheme exponent number after reduction and the resource block size, order of modulation and transport block size are obtained, and enter
It recycles next time.
Wherein, the Second processing module described in above-described embodiment is specifically used for obtaining the second preset value, by the modulation
Encoding scheme exponent number reduces by second preset value.
Specifically, the acquisition module described in above-described embodiment can be used lower structure such as and realize.The acquisition module, packet
It includes：Receiving unit and computing unit.Wherein, the receiving unit is used to receive the channel quality indication (CQI) information that terminal reports.Institute
Computing unit is stated for according to the channel quality indication (CQI) information, determining the Modulation and Coding Scheme exponent number.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit can refer to the corresponding process in preceding method embodiment, and details are not described herein.
As shown in figure 5, the structure diagram for the communication system that the embodiment of the present invention five provides.As shown in figure 5, the communication
System includes base station 10 and terminal 20.Wherein, the base station 10 is used to obtain Modulation and Coding Scheme exponent number；According to modulating-coding side
Case exponent number and the resource block size of distribution, obtain order of modulation and transport block size；In one cycle, according to the resource block
Size, the order of modulation and the transport block size calculate code check；If the code check is less than or equal to default maximal rate,
Then the Modulation and Coding Scheme is determined as the scheme for including the corresponding modulation system of the order of modulation and the transport block size；
If the code check is more than default maximal rate, and the order of modulation is less than default maximum modulation exponent number, then increases the modulation
The order of modulation is updated to the order of modulation after increase, and enter and recycle next time by exponent number.Specifically, in the present embodiment
The base station described in above-described embodiment four can be used in the base station, realizes related content of the structure as described in above-mentioned example IV, this
Place repeats no more.
The present embodiment base station first determines whether order of modulation, when the order of modulation when code check is more than default maximal rate
During less than default maximum modulation exponent number, increase the order of modulation, without directly reducing Modulation and Coding Scheme exponent number, avoid existing
Base station throughput reduces caused by technology reduces Modulation and Coding Scheme exponent number when code check is more than default maximal rate simply
The problem of, so that the Modulation and Coding Scheme that base station when PDCCH occupancy resources are more, determines under the limitation of default maximal rate
The corresponding modulation system of maximum modulation exponent number that may be dispatched is selected, can effectively improve the throughput of cell, and then improve
The Mean Speed of communication system.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, it may refer to the associated description of other embodiment.
In several embodiments provided by the present invention, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of division of logic function can have other dividing mode, such as multiple units or component in actual implementation
It may be combined or can be integrated into another system or some features can be ignored or does not perform.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in one and computer-readable deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, is used including some instructions so that a computer
Equipment（Can be personal computer, server or the network equipment etc.）Or processor（Processor）It is each to perform the present invention
The part steps of embodiment the method.And aforementioned storage medium includes：USB flash disk, mobile hard disk, read-only memory（Read-
Only Memory, abbreviation ROM）, random access memory（Random Access Memory, abbreviation RAM）, magnetic disc or light
The various media that can store program code such as disk.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
To modify to the technical solution recorded in foregoing embodiments or carry out equivalent replacement to which part technical characteristic；
And these modification or replace, various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (13)
1. a kind of Modulation and Coding Scheme determines method, which is characterized in that including：
Obtain Modulation and Coding Scheme exponent number；
According to Modulation and Coding Scheme exponent number and the resource block size of distribution, order of modulation and transport block size are obtained；
In one cycle, according to the resource block size, the order of modulation and the transport block size calculate code check；
If the code check is less than or equal to default maximal rate, the Modulation and Coding Scheme is determined as including the order of modulation
The scheme of corresponding modulation system and the transport block size；
If the code check is more than default maximal rate, and the order of modulation is less than default maximum modulation exponent number, then described in increase
The order of modulation is updated to the order of modulation after increase, and enter and recycle next time by order of modulation.
2. Modulation and Coding Scheme according to claim 1 determines method, which is characterized in that the increase modulation order
Number, including：
Obtain the first preset value；
The order of modulation is increased into first preset value.
3. Modulation and Coding Scheme according to claim 1 or 2 determines method, which is characterized in that the acquisition modulating-coding
Scheme exponent number, including：
Receive the channel quality indication (CQI) information that terminal reports；
According to the channel quality indication (CQI) information, the Modulation and Coding Scheme exponent number is determined.
4. Modulation and Coding Scheme according to claim 1 or 2 determines method, which is characterized in that the money according to distribution
Source block size, the order of modulation and the transport block size after calculating code check, further include：
If the code check is more than the default maximal rate, and the order of modulation is equal to the default maximum modulation exponent number, then
The Modulation and Coding Scheme exponent number is reduced, according to the Modulation and Coding Scheme exponent number after reduction and the resource block size, obtains tune
Exponent number processed and transport block size, and enter and recycle next time.
5. Modulation and Coding Scheme according to claim 4 determines method, which is characterized in that described to reduce the modulating-coding
Scheme exponent number, including：
Obtain the second preset value；
The Modulation and Coding Scheme exponent number is reduced into second preset value.
6. Modulation and Coding Scheme according to claim 1 or 2 determines method, which is characterized in that described according to modulating-coding
Scheme exponent number and the resource block size of distribution, obtain order of modulation and transport block size, including：
According to preset Modulation and Coding Scheme exponent number and the correspondence of order of modulation, the Modulation and Coding Scheme exponent number pair is obtained
The order of modulation answered；
According to the correspondence of preset Modulation and Coding Scheme exponent number, resource block size and transport block size, the modulation is obtained
Encoding scheme exponent number and the corresponding transport block size of the resource block size.
7. a kind of base station, which is characterized in that including：
Acquisition module, for obtaining Modulation and Coding Scheme exponent number；
First processing module for the resource block size according to Modulation and Coding Scheme exponent number and distribution, obtains order of modulation and biography
Defeated block size；
Second processing module, in one cycle, according to the resource block size, the order of modulation and the transmission block
Size calculates code check；If the code check is less than or equal to default maximal rate, the Modulation and Coding Scheme is determined as including institute
State the scheme of the corresponding modulation system of order of modulation and the transport block size；If the code check is more than default maximal rate, and
The order of modulation is less than default maximum modulation exponent number, then increases the order of modulation, the order of modulation is updated to increase
Order of modulation afterwards, and enter and recycle next time.
8. base station according to claim 7, which is characterized in that it is default that the Second processing module is specifically used for acquisition first
The order of modulation is increased by first preset value by value.
9. base station according to claim 7 or 8, which is characterized in that the acquisition module, including：
Receiving unit, for receiving the channel quality indication (CQI) information that terminal reports；
Determination unit, for according to the channel quality indication (CQI) information, determining the Modulation and Coding Scheme exponent number.
10. base station according to claim 7 or 8, which is characterized in that the Second processing module is additionally operable to：When the code
Rate be more than the default maximal rate, and the order of modulation be equal to the default maximum modulation exponent number when, reduce the modulation
Encoding scheme exponent number according to the Modulation and Coding Scheme exponent number after reduction and the resource block size, obtains order of modulation and transmission
Block size, and enter and recycle next time.
11. base station according to claim 10, which is characterized in that the Second processing module is specifically used for：Obtain second
The Modulation and Coding Scheme exponent number is reduced by second preset value by preset value.
12. base station according to claim 7 or 8, which is characterized in that the first processing module includes：
First acquisition unit, for the correspondence according to preset Modulation and Coding Scheme exponent number and order of modulation, described in acquisition
The corresponding order of modulation of Modulation and Coding Scheme exponent number；
Second acquisition unit, for the correspondence according to preset Modulation and Coding Scheme exponent number, resource block size and transport block size
Relationship obtains the Modulation and Coding Scheme exponent number and the corresponding transport block size of the resource block size.
13. a kind of communication system, which is characterized in that including base station and terminal, wherein, the base station uses the claims 7
Any base station in~12.
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| WO2019141232A1 (en) * | 2018-01-19 | 2019-07-25 | 华为技术有限公司 | Communication and mcs receiving and notification method and device |
| CN112865919A (en) | 2018-01-19 | 2021-05-28 | 华为技术有限公司 | Communication, MCS receiving and notifying method and equipment |
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