CN107800509A - A kind of feedback of descending control signaling and repeating method and system - Google Patents
A kind of feedback of descending control signaling and repeating method and system Download PDFInfo
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- CN107800509A CN107800509A CN201610800962.4A CN201610800962A CN107800509A CN 107800509 A CN107800509 A CN 107800509A CN 201610800962 A CN201610800962 A CN 201610800962A CN 107800509 A CN107800509 A CN 107800509A
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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
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0072—Error control for data other than payload data, e.g. control data
- H04L1/0073—Special arrangements for feedback channel
Abstract
The embodiment of the invention discloses a kind of feedback of descending control signaling and repeating method and system.The feedback of descending control signaling includes with repeating method：Command identification information in base station sets descending control signaling, and descending control signaling is sent to terminal；Terminal encodes according to modulating-coding strategy to upstream data, and the CRC of the upstream data after calculation code, and is sent to base station；Base station receives the up encoding block in preset time period, obtains the verification parsing code in the up encoding block, and parsing obtains the feedback command identification information of terminal feedback；Base station determines whether to carry out the retransmission operation of descending control signaling according to the command identification information of feedback command identification information and the descending control signaling currently to come into force.The present invention is realized on the premise of the channel resource of feedback signaling is not increased additionally, improves feedback and the efficiency retransmitted.
Description
Technical field
The present invention relates to data communication technology field, more particularly to a kind of feedback of descending control signaling and repeating method and
System.
Background technology
Data communication system performs error in data control and judged, feedback and repeating method is usually taken.In traditional feedback
With in repeating method, with reference to the CRC (Cyclic Redundancy Check, CRC) in contrast encoding block, adopting
Reliable data transfer is realized with the feedback signaling and Retransmission timeout method of transmission/reception unit control message.
Tradition feedback numbers (TransID) to every control message in transmitting element with repeating method using control message
It is numbered, receiving unit is by the feedback signaling numbered to transmitting element feedback containing control message, and transmitting element is by sentencing
Determine the control message numbering correctness of feedback signaling, decide whether to retransmit certain control message.Under normal circumstances, in order to
Avoiding the error code of receiving unit feedback signaling from losing causes bust this, and transmitting element also uses to be disappeared based on timeout mechanism to certain
Breath is retransmitted, wherein, the timer in timeout mechanism will set the arrival time delay the latest of feedback signaling, typically greater than one
Feedback cycle.
In a communications system, adjusted by Adaptive Modulation and Coding (Adaptive Modulation and Coding, AMC)
Whole modulation system and code rate, i.e., by dynamic regulation data rate to compensate dynamic channel variation.Channel condition compared with
In the case of good, using high-order modulating and higher rate coding；In the case where channel quality is poor, adjusted using low order
System and relatively low rate coding.
Using the feedback signaling and Retransmission timeout method of transmission/reception unit control message, in order to further improve feedback
With the efficiency of re-transmission, can often take the frequency of receiving unit increase feedback signaling, there will be introduce extra feedback channel resources,
The problem of reducing power system capacity.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of feedback of descending control signaling and repeating method and system, with
On the premise of the channel resource for not increasing feedback signaling additionally, feedback and the efficiency retransmitted are improved.
In a first aspect, the embodiments of the invention provide a kind of feedback of descending control signaling and repeating method, including：
Command identification information in base station sets descending control signaling, and descending control signaling is sent to terminal, it is descending
Control signaling includes modulating-coding strategy；
Terminal obtains command identification information and modulating-coding strategy in the descending control signaling received, is compiled according to modulation
Code strategy encodes to upstream data, and the CRC of the upstream data after calculation code, is given birth to according to command identification information and CRC
Code is parsed into verification, the upstream data after coding and verification parsing code are encapsulated as up encoding block, are sent to base station；
Base station receives the up encoding block in preset time period, the verification parsing code in the up encoding block is obtained, to school
Parsing code is tested to be parsed to obtain the feedback command identification information of terminal feedback；
Command identification information of the base station in feedback command identification information and the descending control signaling currently to come into force, judge
Whether the retransmission operation of descending control signaling is carried out.
Second aspect, the embodiments of the invention provide a kind of feedback of descending control signaling and retransmission system, including：
Descending control signaling sending module, is configured in base station, for setting the letter of the command identification in descending control signaling
Breath, and descending control signaling is sent to terminal, the descending control signaling includes modulating-coding strategy；
Descending control signaling feedback module, is configured in terminal, for obtaining the finger in the descending control signaling received
Identification information and modulating-coding strategy are made, upstream data is encoded according to modulating-coding strategy, and it is upper after calculation code
The CRC of row data, according to the command identification information and CRC generation verification parsing codes, and by the upstream data after coding and
The verification parsing code is encapsulated as up encoding block, is sent to the base station；
Feedback information acquisition module, it is configured in the base station, for receiving the up encoding block in preset time period, obtains
Take the verification in the up encoding block to parse code, the verification parsing code is parsed to obtain the feedback command mark of terminal feedback
Know information；
Determination module is retransmitted, is configured in the base station, for coming into force according to the feedback command identification information and currently
Descending control signaling command identification information, determine whether carry out descending control signaling retransmission operation.
As shown from the above technical solution, the embodiment of the present invention by descending control signaling add command identification information, and
It is descending by verifying parsing code carrying in upstream data is up encoding block when terminal-pair descending control signaling is fed back
The feedback information of control signaling, so as to which base station is determined whether to descending control signaling progress retransmission operation according to the feedback information.
Realize on the premise of the channel resource of feedback signaling is not increased additionally, improve feedback and the efficiency retransmitted.
Brief description of the drawings
Fig. 1 is the feedback and repeating method schematic flow sheet for a kind of descending control signaling that the embodiment of the present invention one provides；
Fig. 2 is the feedback and repeating method schematic flow sheet for a kind of descending control signaling that the embodiment of the present invention two provides；
Fig. 3 is the feedback and repeating method schematic flow sheet for a kind of descending control signaling that the embodiment of the present invention three provides；
Fig. 4 is the feedback and repeating method schematic flow sheet for a kind of descending control signaling that the embodiment of the present invention four provides；
Fig. 5 is the feedback and retransmission system structural representation for a kind of descending control signaling that the embodiment of the present invention seven provides.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.It is appreciated that
It is that specific embodiment described herein is only used for explaining the present invention, rather than limitation of the invention.Further need exist for explanation
It is, for the ease of description, part related to the present invention rather than entire infrastructure to be illustrate only in accompanying drawing.
Embodiment one
Fig. 1 is the feedback and repeating method schematic flow sheet for a kind of descending control signaling that the embodiment of the present invention one provides.
This method can be performed by a kind of feedback of descending control signaling with retransmission system, and the system can be by software and/or hardware
Mode realize, as shown in figure 1, this method includes：
Command identification information in S110, base station sets descending control signaling, and descending control signaling is sent to terminal,
Descending control signaling includes modulating-coding strategy；
Wherein, command identification information is the identification information to descending control signaling, and corresponding with descending control signaling, excellent
Choosing, command identification information is the number information to descending control signaling.Modulating-coding strategy is Adaptive Modulation and Coding strategy
(Adaptive Modulation and Coding, AMC).AMC is according to the suitable modulation of wireless channel change selection and compiled
Code mode, network side is according to user's momentary channel quality situation and the most suitable downlink of current resource selection is modulated and coding
Mode, user is set to reach as far as possible high data throughput.
In the AMC mechanism of communication system, base station passes through descending control signaling (Downlink Control
Information, DCI) message is by up-downgoing modulating-coding strategy (the Modulation and Coding of newest scheduling
Scheme, MCS) information is sent to terminal, transmission upstream control signaling (the Uplink Control of terminal periodic
Information, UCI) DCI reception condition is fed back.
By adding command identification information (TransID) in DCI, it is easy to receive the descending control that base station sends in terminal
It is identified after signaling processed, and carries out associative operation.
Exemplary, base station performs quick AMC, sends DCI notice terminal renewal up-downgoings MCS.At the beginning of DCI TransID
Beginning is set to 0, and base station is for transmission each DCI of terminal, and corresponding TransID automatically updates, and more new formula is：
TransIDi+1=(TransIDi+1)mod(IdMax)。
Wherein, TransID is the command identification information of descending control signaling, i.e. message numbering, and IdMax represents TransID
Maximum occurrences, by TransID take bit number determines, i be base station transmission the i-th frame descending control signaling, i=1,
2,…,IdMax。
S120, terminal obtain command identification information and modulating-coding strategy in the descending control signaling received, according to
Modulating-coding strategy encodes to upstream data, and the CRC CRC of the upstream data after calculation code, according to
The command identification information and CRC generation verification parsing code, and by the upstream data after coding and verification parsing code be encapsulated as it is up
Encoding block, it is sent to base station；
CRC is that a kind of one kind that brief fixed digit check code is produced according to data such as network packet or computer documents dissipates
Array function, the mistake for being mainly used to detection or verification data transmission or being likely to occur after preserving.
Terminal, be according to the modulating-coding in the descending control signaling being most recently received when sending upstream data to base station
Strategy encodes to the upstream data, obtains encoding block, and calculate the CRC of each encoding block respectively.In the present embodiment, eventually
CRC is calculated in end, after the command identification information for the descending control signaling being most recently received is carried out into Binary Conversion computing, with
CRC carries out XOR generation verification parsing code, and verification parsing code is encapsulated into the check bit of up encoding block, and will coding
Data afterwards are encapsulated into the data bit of up encoding block, and up encoding block is sent into base station.
The command identification information of feedback is carried by the verification parsing code of up encoding block so that the command identification letter of feedback
Breath avoids the extra feedback channel resources of introducing without extra channel resource is taken, the problem of reducing power system capacity.
S130, base station receive the up encoding block in preset time period, obtain the verification parsing code in the up encoding block,
Verification parsing code is parsed to obtain the feedback command identification information of terminal feedback；
After terminal sends up encoding block to base station, row decoding is entered in base station to up encoding block, obtains in up encoding block
Verification parsing code, and to verification parsing code parsed to obtain feedback command identification information.Preset time period is inscribed for base station
The up encoding block received parses to obtain the feedback command identification information of each up encoding block respectively.
S140, base station according to the command identification information of feedback command identification information and the descending control signaling currently to come into force,
Determine whether the retransmission operation of progress descending control signaling.
Base station by the feedback command identification information of each up encoding block received in preset time period respectively with currently
Command identification information in the descending control signaling to come into force is compared, and judges whether to work as previous existence according to comparison result
The retransmission operation of the descending control signaling of effect.
Wherein, base station is directed to each frame descending control signaling sent to terminal, without waiting for the feedback acknowledgment of terminal,
Come into force automatically after the default frame of delay.Wherein, the default frame is preferably 2.
The technical scheme of the present embodiment, by adding command identification information in descending control signaling, and under terminal-pair
When row control signaling is fed back, descending control signaling is carried by verifying parsing code in upstream data is up encoding block
Feedback information, so as to which base station is determined whether to descending control signaling progress retransmission operation according to the feedback information.Solve existing
To that when improving feedback and the efficiency of re-transmission, extra feedback channel resources can be introduced, reduce the problem of power system capacity in technology,
Retransmit, realized on the premise of the channel resource of feedback signaling is not increased additionally, greatly due to being no longer rely on timeout mechanism triggering
The big efficiency for improving feedback and retransmitting.
Embodiment two
Fig. 2 is the feedback and repeating method schematic flow sheet for a kind of descending control signaling that the embodiment of the present invention two provides.
The present embodiment is optimized on the basis of embodiment one, further illustrates the process of feedback and feedback of descending control signaling
The acquisition flow of command identification information.This method specifically includes as follows：
Command identification information in S210, base station sets descending control signaling, and descending control signaling is sent to terminal,
Descending control signaling includes modulating-coding strategy；
S220, terminal obtain command identification information and modulating-coding strategy in the descending control signaling received, according to
Modulating-coding strategy encodes to upstream data, and the CRC CRC of the upstream data after calculation code, terminal
Binary Conversion computing is carried out to command identification information and obtains command identification information intermediate code, and obtains CRC digit；
Command identification information intermediate code is that command identification information is converted to the transitional information of command identification information code, be by
Metric command identification information is converted to what binary system obtained.
S230, terminal repetitive instruction identification information intermediate code obtain command identification to command identification information intermediate code zero padding
Information code, make the digit of command identification information code identical with CRC digit；
The zero padding of terminal-pair command identification information intermediate code can be in intermediate code head or afterbody addition numeral 0, can also be same
When head and afterbody addition numeral 0, as long as can make it that the digit of command identification information code is identical with CRC digit.
Further, when CRC digit is the first integral multiple of the digit for instructing identification information intermediate code, terminal-pair refers to
Make identification information intermediate code carry out the first integer to repeat, and combine and obtain command identification information code, believe command identification
The digit for ceasing code is identical with CRC digit；
When CRC digit is not the integral multiple for the digit for instructing identification information intermediate code, terminal-pair command identification information
Intermediate code head or afterbody addition numeral 0, form command identification information code, make the digit of command identification information code and CRC position
Number is identical.
Exemplary, when CRC digit is 16 bits, command identification information is 15, among corresponding command identification information
Code is 1111, and digit is 4 bits, then CRC digit is instruct code bit number among identification information 4 times, right according to above-mentioned rule
The command identification information code that command identification information intermediate code 1111 is repeated 4 times to obtain is 1,111 1,111 1,111 1111.
Exemplary, when CRC digit is 16 bits, command identification information is 7, corresponding command identification information intermediate code
For 111, digit is 3 bits, then CRC digit is not the integral multiple for instructing identifier information bit number, according to above-mentioned rule to instruction
The command identification information code that the head of identification information intermediate code 111 addition numeral 0 obtains is 0,000 0,000 0,000 0111.
S240, terminal-pair CRC and command identification information code carry out XOR generation verification parsing code.
By above-mentioned processing, CRC digit is identical with the digit of command identification information code, to CRC and command identification information
Code carries out XOR generation verification parsing code, because XOR is reversible, is easy to base station parsing verification parsing code to obtain terminal
The command identification information of feedback.
Upstream data after coding and verification parsing code are encapsulated as up encoding block by S250, terminal, are sent to base station.
S260, base station receive the up encoding block in preset time period, obtain the verification parsing code in the up encoding block
And the CRC of the up encoding block is calculated, and the CRC and verification parsing code are subjected to XOR, obtain command identification parsing code；
Verification parsing code be the CRC that is calculated by terminal with command identification information code carry out XOR to, base
Stand and CRC is calculated according to same computational methods, in the case of no error of transmission, what the CRC was calculated with terminal
CRC is identical, and the CRC being calculated and verification parsing code are carried out XOR call instruction identification (RNC-ID) analytic code, the instruction mark by base station
It is identical with the command identification information code obtained after terminal processes to know parsing code.
S270, base station obtain the inverse operation of command identification information code according to terminal, and command identification parsing code is changed
Obtain command identification inverse conversion information；
Exemplary, command identification information is 7, and corresponding command identification information intermediate code is 111, and digit is 3 bits, when
CRC digit is 16 bits, and CRC digit is not the integral multiple for instructing identifier information bit number, and instruction is marked according to above-mentioned rule
It is 0,000 0,000 0,000 0111 to know information intermediate code 111 to add the command identification information code that numeral 0 obtains；Do not transmitting
In the case of mistake, its corresponding inverse operation i.e., first pair with the head of command identification information code identical command identification parsing code
Portion removes numeral 0, obtains command identification inverse conversion information intermediate code, command identification inverse conversion information intermediate code is binary word
Symbol, and the decimal system is carried out to command identification inverse conversion information intermediate code and is converted to command identification inverse conversion information.
S280, when command identification inverse conversion information is effective, determine instruction mark inverse conversion information be feedback command mark
Information.
When being transmitted due to data in communication channel, due to the influence of channel, when receiving data, mistake occurs in data
By mistake, therefore, can cause according to terminal obtain your transitional information of command identification that the inverse operation of command identification information code obtains without
Effect, when command identification inverse conversion information is invalid, determines up encoding block mistake.Command identification inverse conversion information is invalid two kinds
Situation：
Repeated when terminal-pair command identification information intermediate code carries out the first integer, obtain command identification information code
When, base station carries out inverse operation to command identification parsing code, the first integer command identification inverse conversion information obtained by bit
It is different；
Base station parses obtained command identification inverse conversion information, more than or equal to IdMax, i.e. command identification information most
Big value.
In addition to two kinds of invalid situations of above-mentioned command identification inverse conversion information, other command identification inverse conversion information are
Effectively.
S290, base station according to the command identification information of feedback command identification information and the descending control signaling currently to come into force,
Determine whether the retransmission operation of progress descending control signaling.
The technical scheme of the present embodiment, on the basis of above-described embodiment, by the way that XOR is applied into descending control
In the process of signaling feedback and the acquisition process of feedback command identification information, it can more fast and accurately judge effectively to instruct
Identify inverse conversion information；And then base station is set quickly to determine whether to retransmit.
Embodiment three
Fig. 3 is the feedback and repeating method schematic flow sheet for a kind of descending control signaling that the embodiment of the present invention three provides.
The present embodiment is optimized on the basis of above-described embodiment, further illustrates the judgement of descending control signaling retransmission operation
Rule.As shown in figure 4, this method includes：
Command identification information in S310, base station sets descending control signaling, and descending control signaling is sent to terminal,
Descending control signaling includes modulating-coding strategy；
S320, terminal obtain command identification information and modulating-coding strategy in the descending control signaling received, according to
Modulating-coding strategy encodes to upstream data, and the CRC CRC of the upstream data after calculation code, according to
The command identification information and CRC generation verification parsing code, and by the upstream data after coding and verification parsing code be encapsulated as it is up
Encoding block, it is sent to base station；
S330, base station receive the up encoding block in preset time period, obtain the verification parsing code in the up encoding block,
Verification parsing code is parsed to obtain the feedback command identification information of terminal feedback；
S340, base station are come into force the feedback command identification information of the up encoding block in preset time period and currently descending
The command identification information of control signaling is compared, and statistical comparison result, obtains statistical result；
S350, base station determine whether to carry out the retransmission operation of descending control signaling according to statistical result.
Base station by the feedback command identification information of each up encoding block received in preset time period respectively with currently
Command identification information in the descending control signaling to come into force is compared, and counts comparison result and obtain statistical result, Jin Ergen
Result judges whether to the retransmission operation of descending control signaling currently to come into force according to statistics
The technical scheme of the present embodiment, on the basis of above-described embodiment, by preset time internal feedback command identification
The statistics of comparative result between information and the descending control signaling currently to come into force, improve the judgement effect for whether carrying out retransmission operation
Rate, so that base station can more quickly determine whether to carry out retransmission operation to descending control signaling.
Example IV
Fig. 4 is the feedback and repeating method schematic flow sheet for a kind of descending control signaling that the embodiment of the present invention four provides.
The present embodiment is optimized on the basis of embodiment three, further illustrates the judgement rule of descending control signaling retransmission operation
Then.This method includes：
Command identification information in S410, base station sets descending control signaling, and descending control signaling is sent to terminal,
Descending control signaling includes modulating-coding strategy；
S420, base station open the retransmission timer of descending control signaling；
Retransmission timer is weighed according to the round-trip delay of base station and terminal.In order to prevent the transmission of sometimes data segment
Simply delay, and do not lose caused insignificant repeating transmission and set.
S430, terminal obtain command identification information and modulating-coding strategy in the descending control signaling received, according to
Modulating-coding strategy encodes to upstream data, and the CRC CRC of the upstream data after calculation code, according to
The command identification information and CRC generation verification parsing code, and by the upstream data after coding and verification parsing code be encapsulated as it is up
Encoding block, it is sent to base station；
S440, base station receive the up encoding block in preset time period, obtain the verification parsing code in the up encoding block,
Verification parsing code is parsed to obtain the feedback command identification information of terminal feedback；
S450, base station are come into force the feedback command identification information of the up encoding block in preset time period and currently descending
The command identification information of control signaling is compared；
Under S460, base station count the feedback command identification information of the up encoding block in preset time period and currently come into force
Command identification information identical quantity in row control signaling, as identical quantity；It is up in the statistics preset time period of base station
The feedback command identification information of the encoding block quantity different with the command identification information in the descending control signaling currently to come into force, make
For varying number；
Specifically, the counter EqCnt that identical quantity is defined by base station maintenance is counted, counter initial value 0, when
DCI of the feedback command identification information with currently coming into force command identification information is identical, determines that the parsing that base station receives is somebody's turn to do
The up encoding block of feedback command identification information is correct, and EqCnt value adds 1, i.e., identical quantity adds 1.
Specifically, another counter DiffCnt that varying number is defined by base station maintenance is counted, counter initial value is
0, when DCI of the feedback command identification information from currently coming into force command identification information is different, determine that what base station received parses
Up encoding block to the feedback command identification information is correct, but base station judges that terminal does not receive the descending control currently to come into force
Signaling, at this moment, DiffCnt value add 1, i.e. varying number adds 1.
S470, the sum for calculating identical quantity and the varying number, as effectively and；
Specifically, effective and i.e. DiffCnt+EqCnt；
S480, when effectively and less than or equal to 0 and beyond retransmission timer timing after, descending control signaling is carried out weight
Pass；When effectively and during more than 0, base station calculate identical quantity with effectively and ratio, obtain retransmitting decision content；When re-transmission decision content
During more than predetermined threshold value, base station stops the retransmission timer of the descending control signaling；It is less than or equal in advance when retransmitting decision content
If during threshold value, the retransmission operation of base station triggers descending control signaling.
Specifically, effectively and i.e. DiffCnt+EqCnt, when DiffCnt+EqCnt is less than or equal to 0, and it is fixed beyond retransmitting
When device timing, the descending control signaling currently to come into force is retransmitted, when without departing from the timing of retransmission timer, it is not necessary to
Retransmit the descending control signaling currently to come into force.
When DiffCnt+EqCnt is more than 0, calculating EqCnt/ (DiffCnt+EqCnt) value, the value is re-transmission decision content.
When EqCnt/ (DiffCnt+EqCnt) is more than predetermined threshold value, determine terminal have received currently come into force it is descending
Control signaling, base station need not retransmit to descending control signaling again, and at this moment, base station stops the descending control signaling currently coming into force
Retransmission timer.
When EqCnt/ (DiffCnt+EqCnt) is less than or equal to predetermined threshold value, determines that terminal is not received by and work as previous existence
The DCI of effect, the retransmission operation for the descending control signaling that base station triggers currently come into force.
It is above-mentioned relatively retransmit decision content EqCnt/ (DiffCnt+EqCnt) with predetermined threshold value when, can respectively by
EqCnt/ (DiffCnt+EqCnt) is multiplied by 100 with predetermined threshold value, so as to be more prone to judge.
The technical scheme of the present embodiment, on the basis of above-described embodiment, consider and retransmitted a variety of of decision condition
Situation, increase the accuracy of decision condition, and then judge whether descending control signaling is effective, so as to determine whether that information is carried out
Retransmission operation.
Embodiment five
The embodiment of the present invention five provides the feedback and repeating method of a kind of descending control signaling, and the present embodiment is above-mentioned
A preferred embodiment on the basis of embodiment.
In the present embodiment, the up-downgoing MCS information of newest scheduling is sent to terminal by base station by DCI, terminal then cycle
The transmission UCI of property feeds back to DCI reception condition.
For terminal using 3 frames as periodic feedback UCI, DCI retransmission timers are arranged to 40 milliseconds.Base station is directed to a certain terminal,
The DCI that nth frame is sent is DCIN, the descending MCS for carrying newest scheduling is MCS_DLN, the DCINCommand identification information
TransID is 7.
It is that modulating-coding strategy is compiled to upstream data according to MCS after terminal receives the DCI message that TransID is 7
Code, 32 bit CRC check sequences are calculated, then the TransID (7) in 4 bit DCI is converted into binary system and is repeated 8 times, obtained
To combination TransID sequences, i.e. command identification information code, XOR then is carried out with 32 bit CRC check sequences, obtains verification solution
Code is analysed, and the upstream data after coding and verification parsing code are encapsulated as up encoding block, is sent to base station.
Base station present frame come into force DCI TransID be 7, parse the up encoding block of this frame.
By taking a total of 10 up encoding blocks of this frame as an example, wherein, there is the TransID that 2 up encoding blocks are obtained based on CRC
It is invalid, then judge that the two code blocks parse mistake.In remaining 8 up encoding blocks, the feedback for having 3 up encoding blocks to obtain refers to
It is 7 to make identification information, identical with the TransID in the DCI currently to come into force, then obtains identical quantity EqCnt=3, have 5 it is up
The TransID that encoding block obtains is not equal to 7, then obtains varying number DiffCnt=5.
Then effectively and be EqCnt+DiffCnt=8；
Wherein, predetermined threshold value RatioTH is set as 30.
Decision content floor (EqCnt*100/ (EqCnt+DiffCnt))=37 is retransmitted, more than predetermined threshold value RatioTH, then
Think that terminal has had successfully received the DCI message that this frame comes into force, base station stops DCI re-transmissions immediately.
The technical scheme of the present embodiment, by by XOR apply to descending control signaling feed back process and feedback refer to
Make in the acquisition process of identification information, and to preset time internal feedback command identification information and the descending control signaling currently to come into force
Between comparative result counted, and then judge descending control signaling it is whether effective, solve in the prior art to improve feed back
During with the efficiency of re-transmission, extra feedback channel resources can be introduced, reduce the problem of power system capacity, due to being no longer rely on overtime machine
System, which triggers, to be retransmitted, and is realized on the premise of the channel resource of feedback signaling is not increased additionally, is greatly improved feedback and re-transmission
Efficiency.
Embodiment six
The embodiment of the present invention six provides the feedback and repeating method of a kind of descending control signaling, and the present embodiment is above-mentioned
A preferred embodiment on the basis of embodiment.
In the present embodiment, the up-downgoing MCS information of newest scheduling is sent to terminal by base station by DCI, terminal then cycle
The transmission UCI of property feeds back to DCI reception condition.
For terminal using 3 frames as periodic feedback UCI, DCI retransmission timers are arranged to 40 milliseconds.Base station is directed to a certain terminal,
The DCI that nth frame is sent is DCIN, the descending MCS for carrying newest scheduling is MCS_DLN, the DCINTransID be 7.
After terminal receives the DCI message that TransID is 7, upstream data is encoded according to modulating-coding strategy, calculated
32 bit CRC check sequences, then the TransID (7) in 4 bit DCI is converted into binary system and is repeated 8 times, combined
TransID sequences, i.e. command identification information code, XOR then is carried out with 32 bit CRC check sequences, obtains verification parsing code,
And the upstream data after coding and verification parsing code are encapsulated as up encoding block, it is sent to base station.
Base station present frame come into force DCI TransID be 7, parse the up encoding block of this frame.
Assuming that a total of 10 up code blocks of this frame, wherein, have 1 up encoding block based on the TransID that CRC is obtained without
Effect, judge that this code block parses mistake.The feedback command identification information all 6 that remaining 9 code blocks obtain according to CRC XORs,
The TransID currently to come into force in DCI is differed, i.e., identical quantity EqCnt=0, varying number DiffCnt=9.
Predetermined threshold value RatioTH is set as 30.
Effective and EqCnt+DiffCnt=9,
Decision content floor (EqCnt*100/ (EqCnt+DiffCnt))=0 is retransmitted, less than predetermined threshold value RatioTH, then
Think that terminal does not receive the DCI message that this frame comes into force, triggering base station retransmits TransID=7 DCI message immediately.
The technical scheme of the present embodiment, by by XOR apply to descending control signaling feed back process and feedback refer to
Make in the acquisition process of identification information, and to preset time internal feedback command identification information and the descending control signaling currently to come into force
Between comparative result statistics, and then judge descending control signaling it is whether effective, solve in the prior art to improve feedback with
During the efficiency of re-transmission, extra feedback channel resources can be introduced, reduce the problem of power system capacity, due to being no longer rely on timeout mechanism
Triggering retransmits, and realizes the effect on the premise of the channel resource of feedback signaling is not increased additionally, greatly improving feedback and retransmitting
Rate.
Embodiment seven
Fig. 5 is the feedback and retransmission system structural representation for a kind of descending control signaling that the embodiment of the present invention seven provides.
As shown in figure 5, the system includes：The descending control signaling sending module 511 that is configured in base station 510, it is configured in terminal 520
Descending control signaling feedback module 521, the feedback information acquisition module 512 that is configured in base station 510 and be configured at base station 510
In re-transmission determination module 513.
Wherein, descending control signaling sending module 511, it is configured in base station 510, for setting in descending control signaling
Command identification information, and descending control signaling is sent to terminal, descending control signaling includes modulating-coding strategy；
Descending control signaling feedback module 521, it is configured in terminal 520, for obtaining the descending control signaling received
In command identification information and modulating-coding strategy, upstream data is encoded according to modulating-coding strategy, and calculation code
The CRC of upstream data afterwards, according to the command identification information and CRC generation verification parsing codes, and by the upstream data after coding
Up encoding block is encapsulated as with verification parsing code, is sent to base station；
Feedback information acquisition module 512, it is configured in base station 510, for receiving the up encoding block in preset time period,
The verification parsing code in the up encoding block is obtained, the feedback command for being parsed to obtain terminal feedback to verification parsing code identifies
Information；
Determination module 513 is retransmitted, is configured in base station 510, for coming into force according to feedback command identification information and currently
The command identification information of descending control signaling, determine whether to carry out the retransmission operation of descending control signaling.
Further, descending control signaling feedback module includes：
Intermediate code acquiring unit, obtained for carrying out Binary Conversion computing to command identification information in command identification information
Between code, and obtain CRC digit；
Command identification information code acquiring unit, for repetitive instruction identification information intermediate code or to command identification information among
Code zero padding obtains command identification information code, makes the digit of command identification information code identical with CRC digit；
Verification parsing code acquiring unit, for carrying out XOR generation verification parsing to CRC and command identification information code
Code；
Feedback information acquisition module includes：
Command identification parses code acquiring unit, for obtaining the parsing code of the verification in the up encoding block and to calculate this up
The CRC of encoding block, and the CRC and verification parsing code are subjected to XOR, obtain command identification parsing code；
Command identification inverse conversion information acquisition unit, for obtaining command identification according to command identification information code acquiring unit
The inverse operation of information code, command identification parsing code is carried out being converted to command identification inverse conversion information；
Feedback command identification information determining unit, when command identification inverse conversion information is effective, determine instruction mark reverses
It is feedback command identification information to change information.
Further, command identification information code acquiring unit includes：
Identification information intermediate code repeats subelement, for being to instruct the digit of identification information intermediate code when CRC digit
During the first integral multiple, the first integer is carried out to command identification information intermediate code and repeated, and combines and obtains command identification letter
Code is ceased, makes the digit of command identification information code identical with CRC digit；
Command identification information intermediate code adds 0 subelement, for not being the position of instruction identification information intermediate code when CRC digit
During several integral multiple, numeral 0 is added to command identification information intermediate code head or afterbody, command identification information code is formed, makes finger
Make the digit of identification information code identical with CRC digit.
Further, retransmitting determination module includes：
Statistical result acquiring unit, for by the feedback command identification information of the up encoding block in preset time period and work as
Before the command identification information of descending control signaling that comes into force be compared, and statistical comparison result obtains statistical result；
Statistical result identifying unit, for according to statistical result, determining whether to carry out the retransmission operation of descending control signaling.
Further, the feedback of descending control signaling also includes with retransmission system：
Retransmission timer opening unit, is arranged in base station, and the retransmission timer of descending control signaling is opened for base station；
Specifically, statistical result acquiring unit includes：
Identical quantity statistics subelement, for counting the feedback command identification information of the up encoding block in preset time period
Command identification information identical quantity in the descending control signaling currently to come into force, as identical quantity；
Varying number counts subelement, for counting the feedback command identification information of the up encoding block in preset time period
The different quantity of command identification information in the descending control signaling currently to come into force, as varying number；
Specifically, statistical result identifying unit includes：
Effectively and computation subunit, for calculating sum of identical quantity and the varying number, as effectively with；
First retransmit subelement, for when effectively and less than or equal to 0 and exceed the retransmission timer timing after, it is right
Descending control signaling is retransmitted；
Retransmit decision content and obtain subelement, for when effectively and during more than 0, calculate identical quantity with effectively and ratio,
Obtain retransmitting decision content；
Retransmission timer stops subelement, for when re-transmission decision content is more than predetermined threshold value, stopping descending control signaling
Retransmission timer；
Second retransmits subelement, for when re-transmission decision content is less than or equal to predetermined threshold value, triggering descending control signaling
Retransmission operation.
The technical scheme of the present embodiment, by adding command identification information in descending control signaling, and under terminal-pair
When row control signaling is fed back, descending control signaling is carried by verifying parsing code in upstream data is up encoding block
Feedback information, so as to which base station is determined whether to descending control signaling progress retransmission operation according to the feedback information.Solve existing
To that when improving feedback and the efficiency of re-transmission, extra feedback channel resources can be introduced, reduce the problem of power system capacity in technology,
Realize on the premise of the channel resource of feedback signaling is not increased additionally, improve feedback and the efficiency retransmitted.
The feedback for the descending control signaling that the embodiment of the present invention is provided can be used for performing the present invention in fact with retransmission system
The feedback and repeating method for the descending control signaling that example is provided are applied, possesses the corresponding function of execution method and beneficial effect.Not
The ins and outs of detailed description in the present embodiment, reference can be made to the feedback for the descending control signaling that any embodiment of the present invention provides
With repeating method.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. the feedback and repeating method of a kind of descending control signaling, it is characterised in that including：
Command identification information in base station sets descending control signaling, and descending control signaling is sent to terminal, it is described descending
Control signaling includes modulating-coding strategy；
Terminal obtains command identification information and modulating-coding strategy in the descending control signaling received, according to modulating-coding plan
Slightly upstream data is encoded, and the CRC CRC of the upstream data after calculation code, according to the command identification
Information and CRC generation verification parsing codes, and the upstream data after coding and the verification parsing code are encapsulated as up volume
Code block, it is sent to the base station；
The base station receives the up encoding block in preset time period, the verification parsing code in the up encoding block is obtained, to institute
Verification parsing code is stated to be parsed to obtain the feedback command identification information of terminal feedback；
Sentenced according to the command identification information of the feedback command identification information and the descending control signaling currently to come into force the base station
The fixed retransmission operation for whether carrying out descending control signaling.
2. according to the method for claim 1, it is characterised in that terminal generates according to the command identification information and the CRC
Verification parsing code includes：
Command identification information described in the terminal-pair carries out Binary Conversion computing and obtains command identification information intermediate code, and obtains
The digit of the CRC；
The terminal repeats the command identification information intermediate code or the command identification information intermediate code zero padding is instructed
Identification information code, make the digit of the command identification information code identical with the digit of the CRC；
CRC described in the terminal-pair and the command identification information code carry out XOR generation verification parsing code；
The base station obtains the verification parsing code in the up encoding block, the verification parsing code is parsed to obtain terminal anti-
The feedback command identification information of feedback includes：
The base station obtains the verification parsing code in the up encoding block and calculates the CRC of the up encoding block, and by the CRC and
The verification parsing code carries out XOR, obtains command identification parsing code；
The base station obtains the inverse operation of the command identification information code according to the terminal, and code is parsed to the command identification
Carry out being converted to command identification inverse conversion information,
When the command identification inverse conversion information is effective, it is the feedback command mark to determine the command identification inverse conversion information
Know information.
3. according to the method for claim 2, it is characterised in that terminal repeats the command identification information intermediate code or to institute
State command identification information intermediate code zero padding and obtain command identification information code, make the digit of the command identification information code and described
CRC digit is identical, including：
When the digit of the CRC is the first integral multiple of the digit of the command identification information intermediate code, the terminal-pair institute
State command identification information intermediate code the first integer of progress to repeat, and combine and obtain the command identification information code, make institute
The digit for stating command identification information code is identical with the digit of the CRC；
When the digit of the CRC is not the integral multiple of the digit of the command identification information intermediate code, the terminal-pair instruction
Identification information intermediate code head or afterbody addition numeral 0, form the command identification information code, make the command identification information code
Digit it is identical with the digit of the CRC.
4. according to the method for claim 1, it is characterised in that：The base station is according to the feedback command identification information and works as
Before the command identification information of descending control signaling that comes into force, the retransmission operation for determining whether to carry out descending control signaling includes：
The base station is by the feedback command identification information of the up encoding block in preset time period and the descending control currently to come into force
The command identification information of signaling is compared, and statistical comparison result, obtains statistical result；
The base station determines whether to carry out the retransmission operation of descending control signaling according to the statistical result.
5. according to the method for claim 4, it is characterised in that after descending control signaling is sent into terminal in base station,
Also include：
Open the retransmission timer of descending control signaling in the base station；
The base station statistical comparison result, obtaining statistical result includes：
The feedback command identification information of up encoding block in the base station statistics preset time period and the descending control currently to come into force
Command identification information identical quantity in signaling processed, as identical quantity；
The feedback command identification information of up encoding block in the base station statistics preset time period and the descending control currently to come into force
The different quantity of command identification information in signaling processed, as varying number；
According to the statistical result, the retransmission operation for determining whether to carry out descending control signaling includes for the base station：
The base station calculates the identical quantity and sum of the varying number, as effectively with；
When it is described effectively and less than or equal to 0 and beyond the retransmission timer timing after, the base station to it is descending control believe
Order is retransmitted；
When described effectively and during more than 0, the base station calculate the identical quantity with it is described effectively and ratio, obtain re-transmission and sentence
Definite value；
When the re-transmission decision content is more than predetermined threshold value, the base station stops the retransmission timer of the descending control signaling；
When the re-transmission decision content is less than or equal to the predetermined threshold value, the re-transmission behaviour of the base station triggers descending control signaling
Make.
6. the feedback and retransmission system of a kind of descending control signaling, it is characterised in that including：
Descending control signaling sending module, is configured in base station, for setting the command identification information in descending control signaling, and
Descending control signaling is sent to terminal, the descending control signaling includes modulating-coding strategy；
Descending control signaling feedback module, is configured in terminal, for obtaining the instruction mark in the descending control signaling received
Know information and modulating-coding strategy, upstream data is encoded according to modulating-coding strategy, and the upper line number after calculation code
According to CRC, according to the command identification information and CRC generation verification parsing codes, and by the upstream data after coding and described
Verification parsing code is encapsulated as up encoding block, is sent to the base station；
Feedback information acquisition module, it is configured in the base station, for receiving the up encoding block in preset time period, obtaining should
Verification parsing code in up encoding block, the feedback command for being parsed to obtain terminal feedback to the verification parsing code identify letter
Breath；
Determination module is retransmitted, is configured in the base station, under coming into force according to the feedback command identification information and currently
The command identification information of row control signaling, determine whether to carry out the retransmission operation of descending control signaling.
7. system according to claim 6, it is characterised in that the descending control signaling feedback module includes：
Intermediate code acquiring unit, obtained for carrying out Binary Conversion computing to the command identification information in command identification information
Between code, and obtain the digit of the CRC；
Command identification information code acquiring unit, for repeating the command identification information intermediate code or to the command identification information
Intermediate code zero padding obtains command identification information code, makes the digit of the command identification information code identical with the digit of the CRC；
Verification parsing code acquiring unit, for carrying out XOR generation verification to the CRC and the command identification information code
Parse code；
The feedback information acquisition module includes：
Command identification parses code acquiring unit, for obtaining the parsing code of the verification in the up encoding block and calculating the up coding
The CRC of block, and the CRC and the verification parsing code are subjected to XOR, obtain command identification parsing code；
Command identification inverse conversion information acquisition unit, for obtaining the instruction according to the command identification information code acquiring unit
The inverse operation of identification information code, command identification parsing code is carried out being converted to command identification inverse conversion information；
Feedback command identification information determining unit, when the command identification inverse conversion information is effective, determine the command identification
Inverse conversion information is the feedback command identification information.
8. system according to claim 7, it is characterised in that command identification information code acquiring unit includes：
Identification information intermediate code repeats subelement, for being the position of the command identification information intermediate code when the digit of the CRC
During several first integral multiple, the first integer is carried out to the command identification information intermediate code and repeated, and combines and obtains institute
Command identification information code is stated, makes the digit of the command identification information code identical with the digit of the CRC；
Command identification information intermediate code adds 0 subelement, for not being the command identification information intermediate code when the digit of the CRC
Digit integral multiple when, numeral 0 is added to command identification information intermediate code head or afterbody, forms the command identification information
Code, makes the digit of the command identification information code identical with the digit of the CRC.
9. system according to claim 6, it is characterised in that retransmitting determination module includes：
Statistical result acquiring unit, for by the feedback command identification information of the up encoding block in preset time period and working as previous existence
The command identification information of the descending control signaling of effect is compared, and statistical comparison result, obtains statistical result；
Statistical result identifying unit, for according to the statistical result, determining whether to carry out the retransmission operation of descending control signaling.
10. system according to claim 9, it is characterised in that also include：
Retransmission timer opening module, it is configured in the base station, for opening the retransmission timer of descending control signaling；
The statistical result acquiring unit includes：
Identical quantity statistics subelement, for counting the feedback command identification information of the up encoding block in preset time period and working as
Before command identification information identical quantity in the descending control signaling that comes into force, as identical quantity；
Varying number counts subelement, for counting the feedback command identification information of the up encoding block in preset time period and working as
Before the different quantity of command identification information in the descending control signaling that comes into force, as varying number；
The statistical result identifying unit includes：
Effectively and computation subunit, for calculating sum of the identical quantity and the varying number, as effectively with；
First retransmit subelement, for when it is described effectively and less than or equal to 0 and beyond the retransmission timer timing after, it is right
Descending control signaling is retransmitted；
Retransmit decision content and obtain subelement, for effectively and during more than 0, calculated when described the identical quantity with it is described effectively and
Ratio, obtain retransmit decision content；
Retransmission timer stops subelement, for when the re-transmission decision content is more than predetermined threshold value, stopping the descending control
The retransmission timer of signaling；
Second retransmits subelement, for when the re-transmission decision content is less than or equal to the predetermined threshold value, triggering descending control
The retransmission operation of signaling.
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