CN109687936A - A kind of method and device of determining traffic channel transmission block size - Google Patents
A kind of method and device of determining traffic channel transmission block size Download PDFInfo
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- CN109687936A CN109687936A CN201710979805.9A CN201710979805A CN109687936A CN 109687936 A CN109687936 A CN 109687936A CN 201710979805 A CN201710979805 A CN 201710979805A CN 109687936 A CN109687936 A CN 109687936A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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Abstract
The embodiment of the present invention provides a kind of method and device of determining traffic channel transmission block size, this method comprises: obtaining the resource unit number RE_num of Traffic Channel to be measured, modulation coding scheme index value IMCSAnd channel coding method；According to the modulation coding scheme index value IMCSWith preset modulation coding scheme concordance list, the efficiency of transmission of Traffic Channel to be measured is determined；According to the resource unit number RE_num, the channel coding method and the efficiency of transmission, the transport block size TB_size of Traffic Channel to be measured is determined.On the basis of Traffic Channel is using being semi-statically configured, the embodiment of the present invention redesigns the determination of transport block size, effectively increases the utilization rate of resource.
Description
Technical field
The present embodiments relate to field of communication technology, in particular to a kind of method of determining traffic channel transmission block size
And device.
Background technique
With the continuous development of wireless communication technology and mobile Internet and Internet of Things industry flourish, each nothing
Demand of the line electric industry business to radio-frequency spectrum sharply expands, and frequency spectrum resource is increasingly in short supply.
In existing discrete narrow band private network system, frequency domain resource is less, and a son takes only 25KHz bandwidth.Fig. 4 is existing
Schematic diagram of the list with frame structure in discrete narrow band private network system.As shown in figure 4, a son takes including 11 subcarriers,
One radio frames include 5 subframes, and downlink resource is 9 symbols of subframe 0 and preceding 4 symbols of subframe 1, totally 13 orthogonal frequencies
Divide multiplexing (Orthogonal Frequency Division Multiplexing；Referred to as: OFDM) symbol；Ascending resource is son
Rear 4 symbols and subframe 2, subframe 3, subframe 4 of frame 1, totally 31 OFDM symbols.
Wherein, sub-frame of uplink 2, subframe 3,4 constant transmissions Physical Downlink Shared Channel (Physical Downlink of subframe
Shared Channel；Referred to as: PDSCH), pass through the Physical Control Format Indicator Channel of preceding 2 symbols of subframe 0
(Physical Control Format Indicator Channel；Referred to as: PCFICH) indicate subframe 0 rear 5 symbols and
Preceding 4 symbols of subframe 1, totally 9 symbols, transmitting physical downlink channel control (Physical Downlink Control
Channel；Referred to as: PDCCH) or PDSCH.It can thus be seen that PCFICH needs the fixed 2 OFDM symbol for occupying downlink resource
Number, cause the waste in downlink resource use.
Current is to solve the problems, such as the above-mentioned wasting of resources, and Traffic Channel, which can be used, to be semi-statically configured, i.e., in a business tune
It spends in the period, the fixation location transmission PDCCH of downlink resource, remaining downlink resource is used for transmission PDSCH, and PDCCH and PDSCH
The proportion of shared downlink resource determine that and PDCCH can dispatch the money of the part uplink in a cycle by parameter startF
Source is used for transmission PUSCH, and the determination of PDCCH search cycle at most can be with dispatching uplink number of resources.Fig. 5 is existing based on semi-static
The downlink resource of configuration distributes schematic diagram.Such as startF=2, PDCCH and PDSCH proportion are 1:1；Work as startF=4
When, PDCCH and PDSCH proportion are 1:3.
But since the calculation method of existing transport block size is the transport block size index by carrying in PCFICH
Value, is inquired in corresponding concordance list and is obtained, and is semi-statically configured technology as Traffic Channel uses, it is no longer necessary to
PCFICH is indicated, so existing transport block size determines that method is no longer applicable in, it is therefore desirable to provide a kind of new business
The determination method of transmission block size.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of method and device of determining traffic channel transmission block size, by right
Transport block size is redesigned, and the utilization rate of resource is effectively increased.
In a first aspect, the embodiment of the invention provides a kind of method of determining traffic channel transmission block size, this method packet
It includes:
Obtain resource unit number RE_num, modulation coding scheme index value IMCS and the channel coding side of Traffic Channel to be measured
Formula；
According to the modulation coding scheme index value IMCSWith preset modulation coding scheme concordance list, business to be measured is determined
The efficiency of transmission of channel；
According to the resource unit number RE_num, the channel coding method and the efficiency of transmission, business to be measured is determined
The transport block size TB_size of channel.
Second aspect, the embodiment of the present invention provide a kind of device of determining traffic channel transmission block size, which includes:
Acquiring unit, for obtaining resource unit number RE_num, the modulation coding scheme index value I of Traffic Channel to be measuredMCS
And channel coding method；
First determination unit, for according to the modulation coding scheme index value IMCS and preset modulation coding scheme rope
Draw table, determines the efficiency of transmission of Traffic Channel to be measured；
Second determination unit, for according to the resource unit number RE_num, the channel coding method and the transmission
Efficiency determines the transport block size TB_size of Traffic Channel to be measured.
The third aspect, the embodiment of the present invention provide a kind of electronic equipment, which includes:
Memory and processor, the processor and the memory complete mutual communication by bus；It is described to deposit
Reservoir is stored with the program instruction that can be executed by the processor, and it is as follows that the processor calls described program instruction to be able to carry out
Method: resource unit number RE_num, the modulation coding scheme index value I of Traffic Channel to be measured are obtainedMCSAnd channel coding method；
According to the modulation coding scheme index value IMCSWith preset modulation coding scheme concordance list, the biography of Traffic Channel to be measured is determined
Defeated efficiency；According to the resource unit number RE_num, the channel coding method and the efficiency of transmission, business letter to be measured is determined
The transport block size TB_size in road.
Fourth aspect, the embodiment of the present invention provide a kind of computer readable storage medium, are stored thereon with computer program,
The computer program realizes following method when being executed by processor: obtain Traffic Channel to be measured resource unit number RE_num,
Modulation coding scheme index value IMCS and channel coding method；According to the modulation coding scheme index value IMCS and preset tune
Coding mode concordance list processed, determines the efficiency of transmission of Traffic Channel to be measured；According to the resource unit number RE_num, the channel
Coding mode and the efficiency of transmission determine the transport block size TB_size of Traffic Channel to be measured.
The method and device of determining traffic channel transmission block size provided in an embodiment of the present invention, by according to business to be measured
Practical resource unit number RE_num, channel coding method and the efficiency of transmission occupied of channel, so that it is determined that business to be measured is believed
The transport block size TB_size in road, can be improved the utilization rate of resource.
Detailed description of the invention
Fig. 1 is the flow diagram of the method for determining traffic channel transmission block size provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the device of determining traffic channel transmission block size provided in an embodiment of the present invention；
Fig. 3 is the structural block diagram of electronic equipment provided in an embodiment of the present invention；
Fig. 4 is schematic diagram of the list with frame structure in existing discrete narrow band private network system；
Fig. 5 is existing based on the downlink resource being semi-statically configured distribution schematic diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Traffic Channel (Traffic Channel；Referred to as: TCH) for transmitting speech or customer data after encoding, upper
On capable and down channel, point-to-point mode is propagated.
Transmission block (Transport Block；Abbreviation TB) it is defined as the basic switching building between physical layer and media access control sublayer,
Physical layer is that each transmission block adds a CRC code.Namely speech in Traffic Channel or customer data packet constitute transmission block.
Resource unit (Resource Element；It is referred to as: RE) the smallest time-frequency unit, by time-domain OFDM symbol and frequency
Domain subcarrier uniquely determines.
Fig. 1 is the flow diagram of the method for determining traffic channel transmission block size provided in an embodiment of the present invention.Such as Fig. 1
It is shown, method includes the following steps:
S101, resource unit number RE_num, the modulation coding scheme index value I for obtaining Traffic Channel to be measuredMCSIt is compiled with channel
Code mode；
Specifically, the resource unit number RE_num, modulation coding scheme index value IMCSIt is base station with channel coding method
Side is in advance as the case may be (or to be transmitted) traffic channel configuration to be measured, and base station can directly acquire.For example, different tune
Coding mode index value I processedMCSCorresponding different modulation coding scheme.It base station can be according to (or to be transmitted) Traffic Channel matter to be measured
The good job of amount is (or to be transmitted) traffic channel assignments modulation coding scheme index value I to be measuredMCS；Base station and user terminal into
When row data are transmitted, according to the size of data to be transmitted amount, the schedulable resource size of base station side and current modulation coding scheme rope
Draw value IMCSDetermine the resource unit number RE_num occupied needed for (or to be transmitted) Traffic Channel to be measured.
Traffic Channel quality condition can be determined according to the channel state information CSI that user terminal reports, Huo Zheji
Standing itself can also measure Traffic Channel quality.And there are mainly two types of channel coding methods, including convolutional encoding and Turbo
Coding.Base station can determine which kind of channel coding method used according to different types of service.
S102, according to the modulation coding scheme index value IMCSWith preset modulation coding scheme concordance list, determine to be measured
The efficiency of transmission of Traffic Channel；
Specifically, modulation coding scheme determines the efficiency of transmission of Traffic Channel.It base station can be according to IMCSIt inquires preset
Modulation coding scheme concordance list (as shown in table 1) determines I by the concordance listMCSCorresponding modulation coding scheme, thus root
The efficiency of transmission of Traffic Channel is determined according to modulation coding scheme.
1 modulation coding scheme concordance list of table
S103, according to the resource unit number RE_num, the channel coding method and the efficiency of transmission, determine to be measured
The transport block size TB_size of Traffic Channel.
Specifically, base station obtains the occupied resource unit number RE_num of (or to be transmitted) Traffic Channel to be measured, and determines
After the efficiency of transmission of channel coding method used in Traffic Channel to be measured and Traffic Channel to be measured, compiled according to RE_num, channel
Code mode and efficiency of transmission, it is final to determine transport block size TB_size.
As can be seen from the above-described embodiment, base station is after selecting suitable modulation coding scheme, according to data to be transmitted amount
Size, base station side allowable resource and modulation coding scheme, the running time-frequency resource that need to be occupied to Traffic Channel to be measured counts；
Finally, determining the transport block size of Traffic Channel to be measured in conjunction with different channels coding mode.In this way, quiet using half in Traffic Channel
On the basis of state configuration, according to the above method, transport block size can be determined, to effectively increase the utilization of resource
Rate.
On the basis of the above embodiments, in this method according to the resource unit number RE_num, the channel coding
Mode and the efficiency of transmission determine the transport block size TB_size of Traffic Channel to be measured, specifically include:
If the channel coding method is convolutional encoding, determine that the transmission block of the Traffic Channel to be measured is big according to the following formula
Small TB_size:
TB_size=a*floor ((RE_num* efficiency of transmission-L_CRC)/a)
Wherein, a indicates the bit number that the minimum unit of hardware store is included；L_CRC indicates that transmission block adds CRC check
The length of code.
Specifically, floor function floor (x), function is " being rounded downwards ", in other words " to round down ", that is, is taken less
In the maximum integer of x.Under normal circumstances, a value is 8.
On the basis of the above embodiments, in this method according to the resource unit number RE_num, the channel coding
Mode and the efficiency of transmission determine the transport block size TB_size of the Traffic Channel to be measured, specifically include:
If the channel coding method is turbo coding, the transmission block of the Traffic Channel to be measured is determined according to the following formula
Size reference value TB_size (n):
TB_size (n)=TB_size (n-1)-a；
TB_size (0)=a*floor ((RE_num* efficiency of transmission-L_CRC)/a)；
If judgement knows that the transport block size reference value TB_size (n-1) is unsatisfactory for preset turbo coding requirement,
The transport block size reference value TB_size (n) meets preset turbo coding requirement, and the transport block size reference value
TB_size (n-1) is greater than 0, then the transport block size TB_size=TB_size (n) of the Traffic Channel to be measured；
Wherein, a indicates the bit number that the minimum unit of hardware store is included；N is to judge number；L_CRC indicates transmission
The length of block addition cyclic redundancy check.
Specifically, if base station knows that channel coding method mainly includes two when determining transport block size for Turbo coding
A step:
Step 1: base station is first calculated according to formula TB_size0=a*floor ((RE_num* efficiency of transmission-L_CRC)/a)
Tb_size0；Transport block size reference value TB_ when n-th judges is calculated according to TB_size (n)=TB_size (n-1)-a
size(n)。
Step 2: to Tb_size (n-1), further adjustment complies with the design requirement that turbo encodes interleaver, adjusts
Adjusting method is as follows:
Tb_size (n-1) is verified according to the design requirement of turbo coding interleaver, if do not met default
Turbo coding requirement, then judge Tb_size (n-1) whether be greater than 0, if it is greater than 0 execute Tb_size (n)=Tb_size
(n-1)-a。
Step 3: base station verifies Tb_size (n) according to the design requirement of turbo coding interleaver, if Tb_
Size (n) meets preset turbo coding requirement, it is determined that the size TB_size=TB_size (n) of transmission block.
On the basis of the above embodiments, this method further include: if the transport block size reference value TB_ is known in judgement
Size (n-1) is unsatisfactory for preset turbo coding requirement, and the transport block size reference value TB_size (n) meets preset
Turbo coding requirement, and the transport block size reference value TB_size (n-1) is less than 0, the then biography of the Traffic Channel to be measured
Defeated block size TB_size=TB_size (n).
Specifically, Tb_size (n-1) design that further adjustment complies with turbo coding interleaver is wanted in base station
When asking, Tb_size (n-1) is verified according to the design requirement of turbo coding interleaver first, is not inconsistent if judgement is known
Close preset turbo coding requirement, then judge Tb_size (n-1) whether less than 0, if it is less than 0 execute Tb_size (n)=
Tb_size (n-1)+a, then base station verifies Tb_size (n) according to the design requirement of turbo coding interleaver, if symbol
Preset turbo coding requirement is closed, then obtains the transport block size TB_size=TB_size (n) of Traffic Channel to be measured.
On the basis of the various embodiments described above, this method further include: according to the channel quality of Traffic Channel to be measured, determine to
Survey the modulation coding scheme index value I of Traffic ChannelMCS；
According to the IMCS, data to be transmitted amount and current schedulable number of resources, determine Traffic Channel to be measured in dispatching cycle
Interior sub-band number Nsb and radio frames Nf；
According to the sub-band number Nsb and radio frames Nf, the resource unit number RE_num of Traffic Channel to be measured is determined.
Specifically, base station, can be by determining Nf and Nsb, to count when determining the RE_num of uplink/downlink Traffic Channel
Calculation obtains RE_num.The good job of channel quality determines the modulation coding scheme of Traffic Channel to be measured.Base station is according to channel quality
Determine modulation coding scheme index value IMCS；According to data to be transmitted amount or cache size, IMCS, the determination of allowable resource size
Nf and Nsb.
On the basis of the above embodiments, in this method according to the sub-band number Nsb and radio frames Nf, determine to be measured
The resource unit number RE_num of Traffic Channel, specifically includes:
RE_num=RE_num_f*Nsb*Nf；
Wherein, the RE number that RE_num_f includes by unit resource block.
Specifically, RE_num_f can be specifically determined according to the communication standard protocol of use, for indicating a resource
RE number included in block.
On the basis of the various embodiments described above, in this method according to the modulation coding scheme index value IMCSWith it is default
Modulation coding scheme concordance list, determine the efficiency of transmission of Traffic Channel to be measured, specifically include:
According to the modulation coding scheme index value IMCSWith preset modulation coding scheme concordance list, business to be measured is determined
The order of modulation and channel code rate of channel；
According to the order of modulation and the channel code rate, the efficiency of transmission of Traffic Channel to be measured is determined.
Specifically, order of modulation is used to calculate the bit number that pattern each code element can represent, such as QPSK, 16QAM,
The corresponding order of modulation of the patterns such as 64QAM is 2,4,6 respectively, then each code element bit number of above-mentioned pattern is 2,4,6 respectively.
Channel code rate refers to the he number of channel transmission per second.It base station can be according to IMCSPreset modulation coding scheme concordance list is inquired,
I is determined by the concordance listMCSCorresponding modulation coding scheme, to determine the tune of Traffic Channel according to modulation coding scheme
Order processed and channel code rate.Then, base station finally determines the biography of Traffic Channel to be measured according to the order of modulation and the channel code rate
Defeated efficiency.
On the basis of the various embodiments described above, this method further include: long according to preset media access control layer transmission block
Metric then, is adjusted the transport block size TB_size.
Specifically, for media access control layer (MAC layer), transport block length should be located at a minimum length value and one
Between a maximum length value, therefore when base station carries out data transmission when transmission block is mapped to MAC layer from physical layer, need pair
Tb_size is adjusted, it is made to meet the min/max transport block length rule of MAC layer.
Fig. 2 is the structural schematic diagram of the device of determining traffic channel transmission block size provided in an embodiment of the present invention.Such as Fig. 2
Shown, which includes: acquiring unit 201, the first determination unit 202 and the second determination unit 203.Wherein:
Acquiring unit 201 is used to obtain resource unit number RE_num, the modulation coding scheme index value of Traffic Channel to be measured
IMCSAnd channel coding method；First determination unit 202 is used for according to the modulation coding scheme index value IMCSWith preset tune
Coding mode concordance list processed, determines the efficiency of transmission of Traffic Channel to be measured；Second determination unit 203 is used for according to the resource list
First number RE_num, the channel coding method and the efficiency of transmission determine the transport block size TB_ of Traffic Channel to be measured
size.It should be noted that the device of determining traffic channel transmission block size provided in an embodiment of the present invention be in order to realize on
Embodiment of the method is stated, function specifically refers to above method embodiment, and details are not described herein again.
On the basis of the above embodiments, the second determination unit in the device is specifically used for: if the channel coding side
Formula is convolutional encoding, then determines the transport block size TB_size of the Traffic Channel to be measured according to the following formula:
TB_size=a*floor ((RE_num* efficiency of transmission-L_CRC)/a)
Wherein, a indicates the bit number that the minimum unit of hardware store is included；L_CRC indicates that transmission block adds CRC check
The length of code.
Fig. 3 is the structural block diagram of electronic equipment provided in an embodiment of the present invention.As shown in figure 3, the electronic equipment includes: to deposit
Reservoir 302 and processor 301, the processor 301 and the memory 302 complete mutual communication by bus 303；Institute
It states memory 302 and is stored with the program instruction that can be executed by the processor, the processor 301 calls described program to instruct energy
Enough execute following method, for example, obtain resource unit number RE_num, the modulation coding scheme index value of Traffic Channel to be measured
IMCSAnd channel coding method；According to the modulation coding scheme index value IMCSWith preset modulation coding scheme concordance list, really
The efficiency of transmission of fixed Traffic Channel to be measured；According to the resource unit number RE_num, the channel coding method and the transmission
Efficiency determines the transport block size TB_size of Traffic Channel to be measured.
The embodiment of the present invention also provides a kind of computer program product, and the computer program product is non-temporary including being stored in
Computer program on state computer readable storage medium, the computer program include program instruction, when described program instructs
When being computer-executed, computer is able to carry out method provided by above-mentioned each method embodiment, for example, obtains industry to be measured
Resource unit number RE_num, the modulation coding scheme index value I of business channelMCSAnd channel coding method；According to the modulating-coding
Mode index value IMCSWith preset modulation coding scheme concordance list, the efficiency of transmission of Traffic Channel to be measured is determined；According to the money
Source unit number RE_num, the channel coding method and the efficiency of transmission determine the transport block size TB_ of Traffic Channel to be measured
size。
The embodiment of the present invention also provides a kind of computer readable storage medium, the computer-readable recording medium storage meter
The instruction of calculation machine, the computer instruction make the computer execute method provided by above-mentioned each method embodiment, for example,
Obtain resource unit number RE_num, the modulation coding scheme index value I of Traffic Channel to be measuredMCSAnd channel coding method；According to institute
State modulation coding scheme index value IMCSWith preset modulation coding scheme concordance list, the efficiency of transmission of Traffic Channel to be measured is determined；
According to the resource unit number RE_num, the channel coding method and the efficiency of transmission, the biography of Traffic Channel to be measured is determined
Defeated block size TB_size.
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
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
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