CN104518856B - The method, apparatus of downlink HARQ feedback is handled in base station and LTE system - Google Patents

The method, apparatus of downlink HARQ feedback is handled in base station and LTE system Download PDF

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CN104518856B
CN104518856B CN201310464646.0A CN201310464646A CN104518856B CN 104518856 B CN104518856 B CN 104518856B CN 201310464646 A CN201310464646 A CN 201310464646A CN 104518856 B CN104518856 B CN 104518856B
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data
harq
instruction
subframe
harq feedback
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CN104518856A (en
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蔡威
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Spreadtrum Communications Shanghai Co Ltd
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Abstract

The method, apparatus of downlink HARQ feedback is handled in a kind of base station and LTE system, the described method includes：Corresponding data structure is set to intra cell communication terminal, the data structure includes n instruction data, the first data that each instruction data include are for the process number for the HARQ processes for indicating to call during each sub-frame transmission data, the process number for the HARQ processes that the corresponding HARQ processes of the first data that the second data that each instruction data include are used to indicate to call during each sub-frame transmission data are not released also and are called when transmitting new data in the subframe, first data and the second data for by bit group into number；When the HARQ feedback message for receiving any communication terminal, then according to the HARQ feedback message to the bit of instruction data is updated accordingly in the data structure of the communication terminal.Technical solution of the present invention can improve the efficiency of downlink HARQ feedback processing, simplify process flow.

Description

The method, apparatus of downlink HARQ feedback is handled in base station and LTE system
Technical field
The present invention relates to downlink HARQ feedback is handled in field of communication technology, more particularly to a kind of base station and LTE system Method, apparatus.
Background technology
In order to adapt to future mobile communication system high-speed and high reliability data transmission and meet new business demand, Third generation partner program（3GPP）Start long evolving system（LTE, Long Term Evolution）.LTE is as 3 g mobile communication（3G）Technology and forth generation mobile communication（4G）A transition between technology, is known as " quasi- 4G " technologies. LTE has high-frequency utilization rate, peak rates, high reliability transport, low delay etc. specific, has become mobile communication technology The important technical innovation of one, field.
Hybrid automatic repeat-request（HARQ, Hybrid Automatic Repeat Request）Technology, then be highly reliable The effective guarantee of property data transfer, is one of key technology of LTE.
LTE system downlink uses asynchronous adaptive HARQ mechanism, i.e.,：In the call by location HARQ process transmissions of any frame After data, the confirmation of receiving terminal is waited for.After receiving terminal receives data, reception detection is carried out, if testing result is correct, A successful respond signal then is fed back to transmitting terminal, otherwise feeds back a non-successful answer signal to transmitting terminal.Transmitting terminal receives Then according to the feedback message of receiving terminal after, search corresponding HARQ processes and be successful respond according to feedback message or non-successful Response decides whether to transmit again.In order to make full use of time-domain resource, LTE system also further employs the HARQ of multi-process Technology, after a subframe calls HARQ process transmission data, during waiting HARQ feedback message to be received, is called other Other data of HARQ process transmissions, that is, have multiple asynchronous adaptive HARQ processes to start at the same time.
In the prior art, when carrying out the processing of LTE downlinks HARQ feedback, two can be safeguarded to the communication terminal in each cell A array or chained list, are respectively used to the idle HARQ processes of storage and busy HARQ processes.When base station receives communication terminal After the feedback message of transmission, traversal searches busy HARQ processes array or chained list, is then determined in next step according to feedback message Operation：If successful respond, then the HARQ processes are taken out from busy HARQ processes array or chained list and be put into the free time HARQ processes array or chained list, otherwise still call the HARQ processes to be retransmitted.However, the lookup to array or chained list can take Substantial amounts of overhead, influences the efficiency of LTE system processing HARQ feedback.Communication terminal quantity especially in cell is more When, the message of downlink HARQ feedback can be very more, and the above problem also can be protruded more.Therefore, it is a kind of efficient there is an urgent need to find Processing downlink HARQ feedback method.
Correlation technique may be referred to the U.S. Patent application of Publication No. US2010202369A1.
The content of the invention
The overhead taken when what the present invention solved is and handles downlink HARQ feedback in the prior art is big, inefficient Problem.
To solve the above problems, technical solution of the present invention provides the side that downlink HARQ feedback is handled in a kind of LTE system Method, including：
Corresponding data structure is set to intra cell communication terminal, and the data structure includes n instruction data, respectively The first data that instruction data include are for the process number for the HARQ processes for indicating to call during each sub-frame transmission data, each indicated number According to including the second data be used for the corresponding HARQ processes of the first data that indicate to call during each sub-frame transmission data and do not released also The process number for the HARQ processes put and called when transmitting new data in the subframe, first data and the second data Be by bit group into number, n includes the number of subframe by a radio frames；
When the HARQ feedback message for receiving any communication terminal, then according to the HARQ feedback message to the communication terminal The bit of instruction data is updated accordingly in data structure.
Optionally, the process number of the HARQ processes of the first data instruction and the HARQ processes of second data instruction Process number be based on HARQ scheduling informations setting, the HARQ scheduling informations include call HARQ process transmission data when son The process number of the HARQ processes of frame number and calling.
Optionally, the process number of the HARQ processes of the first data instruction and the HARQ processes of second data instruction Process number be based on HARQ scheduling informations set include：
Indicated number corresponding with the subframe numbers during calling HARQ process transmission data is searched in the data structure According to；
If the first data of the instruction data found are initial value, make the value of the first data of the instruction data Equal to the process number of the HARQ processes of the calling, the value of the second data of the instruction data is otherwise set to be equal to the calling The process number of HARQ processes.
Optionally, it is described that data are indicated to corresponding in the data structure of the communication terminal according to the HARQ feedback message Bit be updated including：
Based on receive the HARQ feedback message when subframe numbers determine the HARQ feedback message it is corresponding transmission data when Subframe numbers；
Searched in the data structure of the communication terminal corresponding with the subframe numbers during transmission data of the HARQ feedback message Instruction data；
If the HARQ feedback message corresponds to the first data of the instruction data, which is successfully should Answer and the second data of the instruction data are not initial value, then make value of the first data of the instruction data for finding etc. Reset in the value of the second data of the instruction data, and by all bits of the second data of the instruction data；
If the HARQ feedback message corresponds to the first data of the instruction data, which is successfully should Answer and the second data of the instruction data are initial value, then by all ratios of the first data of the instruction data found Special position is reset；
If it is successfully that the HARQ feedback message, which corresponds to the second data of the instruction data and the HARQ feedback message, Response, then reset all bits of the second data of the instruction data found；
If the HARQ feedback message is non-successful response, maintain the first data of the instruction data for finding and All bit invariant positions of second data.
Optionally, respectively instruction data further include the 3rd data corresponding with each first data and with each second data Corresponding 4th data, the 3rd data are used for the number for indicating to call the HARQ process transmission data of the first data instruction, 4th data are used for the number for indicating to call the HARQ process transmission data of the second data instruction, the 3rd data and the Four data are the number being made of bit；It is described according to the HARQ feedback message to corresponding in the data structure of the communication terminal Indicate that the bit of data is updated to further include：When the HARQ feedback message is non-successful response, if the HARQ feedback Message corresponds to the first data of the instruction data found, then the value of corresponding 3rd data of first data is added 1, If the HARQ feedback message corresponds to the second data of the instruction data found, by second data the corresponding 4th The value of data adds 1.
Optionally, the method that downlink HARQ feedback is handled in the LTE system further includes：
If the value for the 3rd data that any instruction data include is more than the maximum transmitted that system allows in the data structure Second data of number and the instruction data are initial value, then by the first data of the instruction data and its corresponding 3rd data All bits reset；
If the value for the 3rd data that any instruction data include is more than the maximum transmitted that system allows in the data structure Second data of number and the instruction data are not initial value, then the value of the first data of the instruction data is equal to the indicated number According to the second data value, make the instruction data corresponding 3rd data of the first data value be equal to the instruction data second The value of corresponding 4th data of data, then all bits of second data and its corresponding 4th data are reset；
If the value for the 4th data that any instruction data include is more than the maximum transmitted that system allows in the data structure Number, then reset all bits of the second data of the instruction data and its corresponding 4th data.
Optionally, the method that downlink HARQ feedback is handled in the LTE system further includes：
, will be with this if occurring feedback time-out when any subframe calls the HARQ process transmission data of the first data instruction The value of corresponding 3rd data of the first data of the corresponding instruction data of subframe adds 1；
, will be with this if occurring feedback time-out when any subframe calls the HARQ process transmission data of the second data instruction The value of corresponding 4th data of the second data of the corresponding instruction data of subframe adds 1.
Optionally, the step for judging to occur feedback time-out when any subframe calls HARQ process transmission data includes：
The corresponding overtime timer of each subframe, subframe numbers of the timeout threshold of the overtime timer based on each subframe are set Determine；
When any subframe calls HARQ process transmission data, start corresponding overtime timer；
Called if the timing length of the overtime timer does not receive yet when being equal to corresponding timeout threshold in the subframe The HARQ feedback message of HARQ process transmission data, then judge feedback time-out occur in the subframe.
Optionally, the step for judging to occur feedback time-out when any subframe calls HARQ process transmission data includes：
If do not received yet at this at its corresponding overtime subframe after any subframe calls HARQ process transmission data Subframe calls the HARQ feedback message of HARQ process transmission data, then judges feedback time-out, time-out occur in the subframe The subframe numbers that the subframe numbers of frame are equal to when each subframe is corresponding to receive HARQ feedback message add timeout threshold, the timeout threshold etc. In m subframe lengths, m ∈ [0,3].
Optionally, the method that downlink HARQ feedback is handled in the LTE system further includes：
Corresponding 5th data and the 6th data are set to intra cell communication terminal, and the 5th data are used to indicate The process number of idle HARQ process, the 6th data are used for the process number for indicating HARQ processes to be retransmitted, the 5th number It is the number that is made of bit according to the 6th data；
To the 5th data and the 6th while the bit of corresponding instruction data in updating the data structure Data are configured.
Optionally, to the described 5th while the bit of the instruction data corresponding in the renewal data structure Data and the 6th data be configured including：
Searched in data structure corresponding with the communication terminal with receiving the subframe numbers pair during the HARQ feedback message The instruction data answered；
If it is successful respond to receive HARQ feedback message, the first data of the instruction data found are indicated The process number of HARQ processes is added to the corresponding bits position of the 5th data；
If it is non-successful response to receive HARQ feedback message, the first data of the instruction data found are indicated The process numbers of HARQ processes be added to the corresponding bits positions of the 6th data.
Optionally, the digit for the bit that the 5th data and the 6th data are included is supported based on the LTE system The quantity of HARQ processes determines.
Optionally, the LTE system is TDD-LTE system, and the quantity of the HARQ processes of the support is by TDD-LTE system Uplink-downlink configuration determine.
Optionally, the LTE system for TDD-LTE system and its retransmit and to be spaced there are the corresponding minimum HARQ of downlink subframe More than one wireless frame length.
To solve the above problems, technical solution of the present invention also provides the dress that downlink HARQ feedback is handled in a kind of LTE system Put, including：
Storage unit, for storing the corresponding data structure of intra cell communication terminal, the data structure includes n Indicate data, the first data that each instruction data include are for the process for the HARQ processes for indicating to call during each sub-frame transmission data Number, each the second data for indicating data and including be used to indicating the corresponding HARQ of the first data that is called during each sub-frame transmission data into The process number for the HARQ processes that journey is not released also and is called when transmitting new data in the subframe, first data Be with the second data by bit group into number, n includes the number of subframe by a radio frames；
First updating block, for when receiving the HARQ feedback message of any communication terminal, according to the HARQ feedback Message is to the bit of instruction data is updated accordingly in the data structure of the communication terminal in the storage unit.
To solve the above problems, technical solution of the present invention, which is also provided in a kind of base station, including above-mentioned LTE system, handles downlink The device of HARQ feedback.
Compared with prior art, technical scheme has the following advantages：
Since each instruction data in the data structure are corresponding with each subframe respectively, when allowing for data structure and carrying Between scale, after HARQ feedback message is received, just can quickly be determined according to subframe numbers when receiving HARQ feedback message pair The instruction data answered, to obtain the process number for the HARQ processes called when the HARQ feedback message is corresponding to transmit data, without The search procedure to array or chained list is carried out again, is improved processing speed, is saved overhead；In addition, respectively indicate data In the second data for the including corresponding HARQ processes of the first data that can indicate to call during each sub-frame transmission data be not released also And the process number for the HARQ processes called when transmitting new data in the subframe so that technical solution of the present invention can also fit For being more than application during a wireless frame length in TD-LTE system there are the corresponding minimum HARQ re-transmissions interval of downlink subframe Scene.Also, due to the number that data structure is made of bit, just the operation of the prior art to array or chained list is changed For the operation to the bit of indicated number evidence in the data structure, further cause the downlink HARQ feedback of LTE system Processing speed is improved.
The characteristics of time scale being carried using the data structure, when instruction data further include the 3rd number being made of bit During according to four data, while HARQ feedback message is received to indicating that the first data of data are updated, pass through letter Single bit-level operation can obtain calling the number of HARQ process transmission data, simplify the number of transmissions and reach system transmission gate The process of abnormal protection in limited time, improves treatment effeciency.
The characteristics of carrying time scale using the data structure, without setting timer, can be achieved with HARQ feedback Overtime abnormal protection, further saves system resource, improves the efficiency of downlink HARQ feedback processing.
When to each communication terminal set it is corresponding be made of bit the 5th data and six data when, can be more directly perceived Reflect which current HARQ process is idle, which HARQ process is waited to retransmit, and is the scheduling office of system next step Reason is provided convenience.
Brief description of the drawings
Fig. 1 is the basic process that some communication terminal calls HARQ processes progress downlink data transmission in LTE system Schematic diagram；
When Fig. 2 is that TDD LTE systems each subframe in uplink-downlink configuration 0 calls HARQ processes progress downlink data transmission Time diagram；
When Fig. 3 is that TDD LTE systems each subframe in uplink-downlink configuration 1 calls HARQ processes progress downlink data transmission Time diagram；
Fig. 4 is the flow diagram for the method that downlink HARQ feedback is handled in the LTE system of the embodiment of the present invention one；
Fig. 5 is the structure diagram of the data structure C in the embodiment of the present invention one；
Fig. 6 is the specific implementation procedure schematic diagram of step S101 shown in Fig. 4；
Fig. 7 is the flow diagram for the method that downlink HARQ feedback is handled in the LTE system of the embodiment of the present invention two；
Fig. 8 is the structure diagram of the data structure D in the embodiment of the present invention two；
Fig. 9 is the flow diagram for the method that downlink HARQ feedback is handled in the LTE system of the embodiment of the present invention three；
Figure 10 is the flow diagram for the method that downlink HARQ feedback is handled in the LTE system of the embodiment of the present invention four；
Figure 11 is the structure diagram for the device that downlink HARQ feedback is handled in the LTE system of the embodiment of the present invention five.
Embodiment
As stated in the Background Art, LTE system downlink uses asynchronous adaptive hybrid automatic repeat-request（HARQ, Hybrid Automatic Repeat Request）Mechanism, wherein " asynchronous " is illustrated using between unfixed re-transmission time Every that is, more than minimum retransmission interval（RTT, Round Trip Time）In the case of, network can select to retransmit the hair of data Send opportunity；" adaptive " is illustrated when data retransmit, can according to the situation of link circuit self-adapting, select use with first Different modulation system during transmission.To Long Term Evolution（LTE, Long Term Evolution）Some communication in cell The basic process that terminal calls HARQ processes to carry out downlink data transmission is as shown in Figure 1：
System call is in subframe i（Downward arrow represents that the subframe is downlink subframe）HARQ processes are called to carry out downlink in place Data transfer, in subframe i+k（Upward arrow represents that the subframe is sub-frame of uplink）Place can receive corresponding HRAQ feedbacks and disappear Breath.If the HARQ feedback message is successful respond（ACK, Acknowledgement）When, represent the data of this downlink transfer Receiving end（That is communication terminal）It is properly received, then this end of transmission；If the HARQ feedback message is non-successful response （NACK, Nacknowledgement/DTX）When, represent that the non-receiving end of data of this downlink transfer is properly received, then need Retransmitted.The position of subframe j is the position that the data retransmit, and system will receive this re-transmission in the position of subframe j+p HARQ feedback message.The rest may be inferred, and data can be transmitted repeatedly, untill sending successfully.As it can be seen that single HARQ processes are to adopt With the mechanism of " stopping ", i.e., the transmitting procedure of one downlink data includes downlink data transmission, uplink HARQ feedback and possibility Re-transmission, until data are properly received by communication terminal.Certainly, it is contemplated that actual conditions, LTE system will not be undying to one A data carry out re-transmission repeatedly, when the number for transmitting data reaches the maximum transmission times of system permission, can terminate to this The re-transmission of data, to discharge the transmission that occupied HARQ processes carry out other data.The related specifications of LTE allow system Maximum transmission times be { 1,2,3,4,5,6,7,8,9,10,12,16,20,24,28 } in any value.When it is implemented, can To be made choice according to system real network environment and user demand etc..
For the above process, in the prior art, the HARQ processes of free time are stored using array or chained list（free HARQ） With busy HARQ processes（busy HARQ）, after LTE system receives the HARQ feedback message of communication terminal transmission, pass through Traversal searches busy HARQ arrays or chained list to determine the operation of next step：If ACK, then the busy HARQ that will find Process is taken out from busy HARQ processes arrays or chained list, is put into free HARQ processes arrays or chained list；If NACK, Then retransmitted.When there is substantial amounts of communication terminal to access in cell, system HARQ feedback message to be treated can be very more, At this moment system can produce substantial amounts of lookup expense, so that cause LTE system inefficient when carrying out the processing of downlink HARQ feedback, Especially seem especially prominent when the communication terminal of access is a fairly large number of.Further, since inside of base station communication abnormality etc. Problem, it is also possible to cause LTE scheduling system can not receive HARQ feedback message always, it is also necessary in each sub-frame transmission data When set timer to carry out overtime abnormal protection, when the communication terminal quantity of access is larger, can also take substantial amounts of system System resource.
In view of the above-mentioned problems, embodiment of the present invention, which is provided in a kind of efficient LTE system, handles downlink HARQ feedback Method, by setting data that are corresponding, including the instruction data that n is made of bit to the communication terminal in cell Structure, with each the first data for including of instruction data come the process number of HARQ processes that is called when indicating each sub-frame transmission data, With each the second data for including of instruction data come the corresponding HARQ processes of the first data called when indicating each sub-frame transmission data The process number for the HARQ processes for not being released also and being called when transmitting new data in the subframe.Due to the data knot Each instruction data in structure are corresponding with each subframe, allow for data structure and carry time scale, when receiving HARQ feedback message Afterwards, corresponding instruction data can be found according to subframe numbers when receiving HARQ feedback message, further according to HARQ feedback message The renewal that the instruction data are carried out with bit-level operates.Thus the search procedure of array or chained list will be changed in the prior art Into the operation of bit-level so that the expense that LTE system is used to search is greatly reduced, and improves the processing of downlink HARQ feedback Efficiency.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings to the present invention Specific embodiment be described in detail.
First, with time division duplex（TDD, Time Division Duplexing）Exemplified by LTE system, the downlink of explanation The sequential relationship of each link does a simple introduction in HARQ feedback processing：
Time division duplex LTE system, due to there is the distribution between uplink and downlink on time resource, different uplink and downlinks is matched somebody with somebody It is also different to put corresponding sequential relationship.Specifically, during each sub-frame transmission data under different ascending-descending subframes configuring conditions pair Time interval AN TIMING values between the uplink HARQ feedback answered（That is the value of k）, downlink transmission data and possible data The value of minimum interval RTTMIN between re-transmission（That is the difference of j and i）Value referring to table 1：
Table 1
Configured with the first（With setting to 0）TDD LTE systems exemplified by, the quantity of the HARQ processes supported altogether is 4, each Subframe call HARQ processes carry out downlink data transmission sequential relationship as shown in Fig. 2, for example, n-th radio frames subframe 0 Call HARQ processes 1 to carry out downlink data transmission, corresponding HARQ feedback message will be received at the subframe 4 of the radio frames, and Most retransmitted soon in the position of the subframe 0 of the N+1 radio frames when feedback message is NACK.
Again with second of configuration（Configuration 1）Exemplified by, the HARQ that supports altogether is 7 into number of passes, at this moment, is called in each subframe The sequential relationship that HARQ processes carry out downlink data transmission is as shown in Figure 3（The feelings of two HARQ processes called only are shown in Fig. 3 Condition）, for example, the subframe 0 in n-th radio frames calls HARQ processes 1 to carry out downlink data transmission, will be received in the subframe 7 of the frame To corresponding HARQ feedback message.If HARQ feedback message is ACK, release HARQ processes 1, if HARQ feedback message is During NACK, then most retransmitted soon in the position of the subframe 1 of the N+1 radio frames.
As can also be seen from Table 1, for TDD LTE systems, the corresponding number of processes of different uplink-downlink configurations is not yet Together.
It was found from above-mentioned analysis, according to the position for receiving HARQ feedback message, transmission and the HARQ feedback message are extrapolated The position of corresponding data, and possible re-transmission position when the transmission fails.Therefore, technical solution of the present invention be not only restricted to be Downlink minimum retransmission of uniting interval（RTT MIN）Configuration, suitable for the situation of any uplink-downlink configuration of TDD LTE systems.
Embodiment one
As shown in figure 4, to handle the flow diagram of the method for downlink HARQ feedback, bag in the LTE system of the present embodiment Include：
Step S100：Corresponding data structure C, the data structure C is set to include n to intra cell communication terminal Indicate data, the first data that each instruction data include are for the process for the HARQ processes for indicating to call during each sub-frame transmission data Number, each the second data for indicating data and including be used to indicating the corresponding HARQ of the first data that is called during each sub-frame transmission data into The process number for the HARQ processes that journey is not released also and is called when transmitting new data in the subframe, first data Be with the second data by bit group into number, n includes the number of subframe by a radio frames.
A radio frames include 10 subframes, therefore n=10 in the present embodiment in LTE system at present.It is illustrated in figure 5 this The structure diagram of the data structure C of embodiment, it can be seen that include 10 instruction data of the data structure C are respectively C0、C1、…、C9, wherein respectively including the first data being made of 4 bits and the second data being made of 4 bits in instruction data （Instruction data C is only indicated in figure0The first data and the second data）.Since current LTE system can at most support 15 HARQ processes, i.e., corresponding process number is 1~15, therefore will all be determined as 4 comprising bit number in the first data and the second data, To represent the process number of this 15 processes.If with the development of the communication technology, the supported HARQ processes number hair of follow-up system During changing, the bit number that the first data and the second data include is adjusted correspondingly.Correspondingly, each indicated number is wrapped The first data and the initial value of each bit of the second data contained could be provided as 0.As can be seen that by each in data structure Indicate that each indicated number can be mapped by the subscript of data with subframe numbers during transmission data so that when data structure carries Between scale.
For LTE system when carrying out downlink data transmission, LTE system can carry out HARQ scheduling first, and send HARQ scheduling Information, is needed in which subframe, the transmission for calling which HARQ process to carry out data with instruction.Still referring to FIG. 3, if in n-th Call the transmission of HARQ processes 1 data unsuccessful at the subframe 0 of radio frames, i.e., it is received in the position of the subframe 7 of n-th radio frames It is non-successful respond, at this moment with regard to needing to be retransmitted in the position of the subframe 1 of the N+1 radio frames, if system call will at this time Just biography is carried out once in the call by location HARQ processes 2 of the subframe 0 of the N+1 radio frames, due to the HARQ processes 1 in subframe 0 It is not released yet, then the first data in the corresponding instruction data of subframe 0 can't be reset, and be called in subframe 0 HARQ processes 2 transmit new data, just need the process number to HARQ processes 2 by the second data in instruction data at this time Indicated.That is, the first data are used to refer to the HARQ processes called during each sub-frame transmission data in instruction data Process number, and the second data are exactly to be used to refer to the corresponding HARQ processes of the first data called during each sub-frame transmission data also not The process number for the HARQ processes for being released and being called when transmitting new data in the subframe.
HARQ scheduling informations include call HARQ process transmission data when subframe numbers and calling HARQ processes into Cheng Hao.The HARQ scheduling informations sent according to system, can be first to indicating that the first data refer in data accordingly in data structure The process number for the HARQ processes shown and the process number of the HARQ processes of the second data instruction are configured.Specifically, according to HARQ The flow that scheduling information is configured the process number of the HARQ processes of the first instruction data instruction includes：First, in the number According to lookup instruction data corresponding with the subframe numbers during calling HARQ process transmission data in structure.Due in scheduling information Subframe numbers during transmission data are carried, corresponding instruction data can be found in data structure according to this subframe numbers. Still referring to FIG. 3, if system call calls HARQ processes 2 to carry out data transmission in the subframe 0 of the N+1 radio frames, at this moment correspond to Instruction data be just C0, wherein, C0Correspondence is formed by its subscript 0 and subframe 0.Specifically, first judge C0First number According to whether being initial value, if then illustrating still undelivered HARQ processes are not present in subframe 0, then at this moment directly make C0's The value of first data is equal to the process number of the HARQ processes of the calling；If C0The first data whether be non-initial value, So just there are undelivered HARQ processes in explanation subframe 0, at this moment should just make C0The values of the second data be equal to the tune The process number of HARQ processes.As can be seen that the second data of instruction data can consider a spare effect, generally It is able to can be enabled when system retransmits situation when interval is more than the length of radio frames there are the corresponding minimum HARQ of downlink subframe.
After step S100, step S101 is performed：When the HARQ feedback message for receiving any communication terminal, then according to HARQ feedback message is to the bit of instruction data is updated accordingly in the data structure C of the communication terminal.Step S101 It is specific perform as shown in fig. 6, including：
Step S1010：Determine that the HARQ feedback message is corresponding based on subframe numbers when receiving the HARQ feedback message Transmit subframe numbers during data.With reference to table 1, in the received HARQ feedback message of the subframe 7 of n-th radio frames, with regard to that can be somebody's turn to do HARQ feedback message it is corresponding transmission data when subframe numbers be 0 or 1.
Step S1011：Transmission number corresponding with the HARQ feedback message is found in the data structure of the communication terminal According to when the corresponding instruction data of subframe numbers.Based on analysis above it is known that the instruction data in data structure pass through it Subscript and subframe establish one-to-one relation, therefore subframe numbers when transmitting data are determined in step S1010, with regard to energy Determine its corresponding instruction data.
Step S1012：Judge that HARQ feedback message is also corresponded to corresponding to the first data of the instruction data found Whether the second data of the instruction data found, the HARQ feedback message are the second of successful respond and the instruction data Whether data are initial value.
When the judging result of step S1012 corresponds to the first data of instruction data found for HARQ feedback message, The HARQ feedback message is successful respond and second data for indicating data are not initial value, performs step S1013：Make to look into The value of first data of the instruction data found is equal to the value of the second data of the instruction data, and by the second of the instruction data All bits of data are reset.It should be understood that when the second data of the instruction data found are non-initial value, just know It is anti-that road system does not receive corresponding HARQ also when calling the corresponding HARQ process transmissions data of the first data in the subframe at this time When presenting message, and other HARQ processes are called in the subframe transmitting data.When HARQ feedback message corresponds to the finger found First data of registration evidence, and when the HARQ feedback message is ACK, with regard to the first data correspondence for the instruction data for illustrating to find Transmission succeeded, it should by first reset data, represent that the corresponding HARQ processes of the first data are released.It is appreciated that , should be just the HRAQ process transmission numbers for calling the instruction of the second data if receive the corresponding successful respond of the subframe again According to corresponding HARQ feedback message.At this moment, then the value of the first data is made to be equal to the value of the second data.The step of so handling, The first data that can ensure indicated number evidence in data structure are the data first transmitted.In actual implementation, this step can be straight Connect the first data of the instruction data for making to find value be equal to the instruction data the second data value, and by the instruction data The second data all bits reset, without being reset to first data.
It should be noted that in other embodiments, if after the corresponding HARQ processes of the first data are released, can not also The value of the first data is equal to the value of the second data, and all bits of the second data are reset, and will can newly adjust By the use of the process numbers of HARQ processes be stored in bit where former first data as the second new data, and by the second data of original As the first new data.Although in this way, the first data and the second data correspondence on HARQ process Initial Transmission Times no longer There is sequencing, but the arithmetic operation of bit can be reduced, improve treatment effeciency.
When the judging result of step S1012 corresponds to the first data of instruction data found for HARQ feedback message, When the HARQ feedback message is successful respond and the second data of instruction data for searching are initial value, execution step S1014：Will All bits of first data of the instruction data found are reset.Understood with reference to analysis in step S1013, when what is found The second data of data are indicated when being initial value, directly the first reset data to the instruction data.
When the judging result of step S1012 correspond to for HARQ feedback message the second data of instruction data for finding and When the HARQ feedback message is successful respond, then step S1015 is performed, by all of the second data of the instruction data found Bit is reset.
It should be noted that in the present embodiment, if the second data are not initial value, once the first data are corresponding HARQ processes are released, and the value of the first data will be made to be equal to the value of the second data, and by all bit weights of the second data Put, therefore, when the HARQ feedback message received corresponds to the second data of the instruction data found, then the indicated number According to the first data be not released yet.
When the judging result of step S1012 is that HARQ feedback message is non-successful response（No matter the HARQ feedback message pair The first data or the second data for the instruction data that Ying Yu is found）, then step S1016 is performed：Maintenance finds described Indicate the first data of data and all bit invariant positions of the second data.Since received HARQ feedback message is non-successful answer Answer, at this moment need the first data of instruction data to finding or the corresponding data of the second data to be transmitted again, therefore At this moment maintain the first data and the second data of the instruction data constant.
As can be seen that the data structure of each communication terminal establishes one-to-one relation by its subscript and each subframe, make Data structure per se with time scale, can be according to subframe numbers when receiving HARQ feedback message and system in downlink transfer Sequential relationship during data between each link, directly finds the corresponding instruction data being made of bit.Moreover, in instruction data The second data can also any subframe it is corresponding instruction data the corresponding HARQ processes of the first data be not released when, instruction The process number for other HARQ processes called when carrying out data transmission in the subframe again so that in the LTE system of the present embodiment The method of processing downlink HARQ feedback applies also for system there are the corresponding minimum HARQ re-transmissions interval of downlink subframe more than one The application scenarios of wireless frame length.Then, according to the concrete outcome of HARQ feedback message, directly in the instruction data that find Each bit of first data and/or the second data is operated, and discharges the corresponding HARQ processes of data of transmission success, or The data of bust this are retransmitted.So allow for during LTE system carries out downlink HARQ feedback processing, skipping To the search procedure of array or chained list, expense is saved for system, improves treatment effeciency.In addition, will also be to array or chain The operation of table is converted into the operation of the bit-level to the data structure, simplifies process flow, further increases processing effect Rate.
Embodiment two
As shown in fig. 7, to handle the signal of the flow of the method for downlink HARQ feedback in the LTE system of the embodiment of the present invention two Figure, including：
Step S200：Corresponding data structure D is set to intra cell communication terminal.The data structure D includes n Indicate data, it is each to indicate that data include the first data and the 3rd corresponding data, it is each to indicate that data further include the second data And the 4th corresponding data.Wherein, when the first data that respectively instruction data include are used to indicate each sub-frame transmission data The process number of the HARQ processes of calling, the 3rd data corresponding with first data are used to indicate to call the instruction of the first data The number of HARQ process transmission data, the second data that each instruction data include are used to indicate what is called during each sub-frame transmission data The corresponding HARQ processes of first data be not released also and in the subframe transmit data when called HARQ processes into Cheng Hao, the 4th data corresponding with second data are used for time for indicating to call the HARQ process transmission data of the second data instruction Number, first data, the second data, the 3rd data and the 4th data be by bit group into number, n is a radio frames institute Number comprising subframe.As shown in figure 8, be the schematic diagram of data structure D, 10 instruction data that the data structure D is included Respectively D0、D1、…、D9, it is each to indicate that data include the first data and the 3rd corresponding data, the second data And the 4th corresponding data（D is only indicated in figure0The first data and its corresponding 3rd data, the second data and Its corresponding 4th data）, and the nothing of the first data, the second data, the 3rd data and the 4th data to be made of 4 bits Symbolic number, wherein the bit number that the second data include can be determined according to the maximum transmission times that LTE system is set.For example, When the maximum transmission times of LTE system are 4, the 3rd data and the 4th data can be arranged to include 4 bits, and each bit The initial value of position is arranged to 0, and it is 0 to represent the number of transmissions.Since the value of the 3rd data and the value of the 4th data are used to refer to show biography Defeated number, therefore when being configured according to HARQ scheduling informations to the first data and the second data, will also be to the 3rd data Set with the 4th data, specifically, when receiving HARQ scheduling informations, first judged with being adjusted in HARQ scheduling informations accordingly Whether the first data of the corresponding instruction data of subframe numbers during with HARQ process transmission data are initial value, if then referring to this The value of first data of registration evidence is equal to the process number of the HARQ processes of the calling, and first data the corresponding 3rd are counted According to value add 1；If otherwise make the value of the second data of the instruction data equal to the process number of the HARQ processes of the calling, and it is right The value of corresponding 4th data of second data adds 1.
Step S201：When the HARQ feedback message for receiving any communication terminal, then according to the HARQ feedback message to this The bit of instruction data is updated accordingly in the data structure D of communication terminal.To the in instruction data in this step The specific implementation of the renewal of the bit of one data and the second data, refers to the step S101 in embodiment one.Here emphasis Description is how while the first data in instruction data and the bits of the second data are updated, pair with described first The corresponding mistake updated of the bit progress of corresponding 3rd data of data and the 4th data corresponding with second data Journey.Specifically, when HARQ feedback message is non-successful response, if the HARQ feedback message corresponds to the instruction found First data of data, then add 1 by the value of corresponding 3rd data of first data, is searched if the HARQ feedback message corresponds to Second data of the instruction data arrived, then add 1 by the value of corresponding 4th data of second data.For example, n-th without The subframe 7 of line frame have received HARQ feedback message, if the HARQ feedback message received is NACK, then will be to n-th The data transmitted at the subframe 0 of radio frames are retransmitted, if the HARQ feedback message corresponds to D0The first data, then to D0's The value of the bit of corresponding 3rd data of first data adds 1, represents the subframe 0 in n frame, calls D0The first data pair The data of HARQ process transmissions are answered to need once to retransmit.If current retransmit still fails, D0The 3rd data bit Value adds 1 again.Similarly, if the HARQ feedback message corresponds to D0The second data, then to D0Corresponding 4th data of the second data The value of bit add 1, represent the subframe 0 in n frame, call D0The second data corresponding HARQ instance process transmission data need Once to retransmit.
Step S202：Judging whether the value of the 3rd data that any instruction data include in the data structure D is more than is Whether the maximum transmission times and the second data of the instruction data that system allows are initial value.It has been mentioned hereinbefore that system in order to Avoid ceaselessly retransmitting data, a maximum transmission times can be set, once the number of transmission data reaches system and permits Perhaps maximum transmission times, then should discharge this and transmit called HARQ processes, and resource is reserved for the other data of transmission.
Specifically, if the judging result of step S202 is the 3rd data that any instruction data include in the data structure Value when to be more than the maximum transmission times that system allows and the second data of the instruction data be initial value, then it represents that to some The number of transmissions of data has had reached the maximum transmission times of default, and does not call other in the subframe at this time The data of HARQ process transmissions, at this moment perform step S203：By the first data of the instruction data and its corresponding 3rd data All bits reset.For example, work as D0During=[0001010100000000], mean that the subframe 0 in n-th radio frames is adjusted The number of transmissions that data are transmitted with HARQ processes 1 has reached 4 times, if the maximum transmission times of default are 4, at this moment Need D0The first data and its corresponding 3rd data all bits reset, even if D0= [0000000000000000], the HARQ processes 1 for representing to call at subframe 0 discharge.
If the judging result of step S202 is that the value of the 3rd data that any instruction data include in the data structure is big When the maximum transmission times and the second data of the instruction data allowed in system are not initial value, then it represents that to some data The number of transmissions had reached the maximum transmission times of default, and the second data pair are also have invoked in the subframe at this time The HARQ processes answered carry out data transmission, and at this moment should perform step S204：It is equal to the value of the first data of the instruction data to be somebody's turn to do Indicate the value of the second data of data, the value of corresponding 3rd data of the first data of the instruction data is equal to the instruction data Corresponding 4th data of the second data value, then all bit weights by second data and its corresponding 4th data Put.Specifically, the processing to the first data and the second data of the instruction data that find, refers to the step in embodiment one S1013, unlike, the instruction data for making to find the second data value equal to the instruction data the second data value While, it the value of corresponding 3rd data of the first data of the instruction data is equal to the second data pair of the instruction data The value for the 4th data answered, correspondingly, when the second data of the instruction data to finding are reset, also to second number Reset according to corresponding 4th data.For example, work as D0During=[0001010100110001], mean that in n-th radio frames Its number of transmissions of the data of the transmission of subframe 0 has reached 4 times, and calls HARQ processes 3 to pass in the subframe 0 of the N+1 radio frames The number of transmission of data has reached 1 time, if the maximum transmission times of default are 4, at this moment just needs D0First number According to and its all bits of corresponding 3rd data reset, and make in the instruction data the first data and its corresponding 3rd number According to value be equal to the second data of the instruction data and its value of corresponding 4th data, and by the second data of the instruction data And its bit of corresponding 4th data is reset, even if D0=[0011000100000000]。
After step S203 or step S204 is finished, return to step S201, continues with the HARQ feedback received and disappears Breath.
So far, a HARQ downstream feedback processing procedure of LTE system just completes.
As can be seen that the method for the LTE system processing downlink HARQ feedback of the present embodiment, since the data structure carries Time scale so that the search procedure to array or chained list is eliminated in processing procedure, overhead is saved, improves Processing speed.In addition, the process flow that the operation of bit-level is also is simplified, system resource is further saved.
Further, due to further comprises the bit of number for indicating HARQ process transmission data in instruction data Position, thus judge call HARQ process transmission data when whether reached system allow maximum transmission times when, Ke Yizhi Connect and the data structure being made of bit is searched, without being carried out to the array or chained list that store busy HARQ processes Search, simplify abnormal protection flow when the number of transmissions reaches the maximum transmission times of system permission, improve the effect of processing Rate.
Embodiment three
As shown in figure 9, to handle the signal of the flow of the method for downlink HARQ feedback in the LTE system of the embodiment of the present invention three Figure, including：
Step S300：Corresponding data structure D is set to intra cell communication terminal.The data structure D includes n Indicate data, it is each to indicate that data include the first data and the 3rd corresponding data, it is each to indicate that data further include the second data And the 4th corresponding data.Wherein, when the first data that respectively instruction data include are used to indicate each sub-frame transmission data The process number of the HARQ processes of calling, the 3rd data corresponding with first data are used to indicate to call the instruction of the first data The number of HARQ process transmission data, the second data that each instruction data include are used to indicate what is called during each sub-frame transmission data The corresponding HARQ processes of first data be not released also and in the subframe transmit data when called HARQ processes into Cheng Hao, the 4th data corresponding with second data are used for time for indicating to call the HARQ process transmission data of the second data instruction Number, first data, the second data, the 3rd data and the 4th data be by bit group into number, n is a radio frames institute Number comprising subframe.
Step S301：When the HARQ feedback message for receiving any communication terminal, then according to the HARQ feedback message to this The bit of instruction data is updated accordingly in the data structure D of communication terminal.
The specific implementation of step S300 and step S301 refers to step S200 and step S201 in embodiment two, herein Repeat no more.
Step S302：Determine whether occur feedback time-out when any subframe calls HARQ process transmission data.Above Through mentioning, the problems such as due to inside of base station communication abnormality, in fact it could happen that LTE system can not receive HARQ feedback message always Situation, therefore also need to carry out receiving overtime abnormal protection in each sub-frame transmission data.Carried out in view of LTE system During the processing of downlink HARQ feedback, there is relatively-stationary sequential relationship between links, therefore from calling HARQ processes The subframe numbers carried out data transmission, it may be determined that the corresponding subframe numbers for receiving HARQ feedback message.If in definite subframe numbers The a period of time of delay afterwards does not receive the HARQ feedback message of the data yet, then inside of base station communication abnormality is considered as, this When by corresponding overtime abnormity protection function system breakdown should be avoided to wait the state of HARQ feedback message to be received.
Specifically：First, the subframe numbers of corresponding overtime subframe when any subframe calls HARQ process transmission data are determined. In general, any subframe calls subframe numbers when HARQ process transmission data are corresponding to receive HARQ feedback message to add timeout threshold, Just it is a time out the subframe numbers of subframe.Wherein timeout threshold can be the length of m subframe, m ∈ [0,3], taken in the present embodiment m= 3, i.e. overtime protection threshold time is 3ms.Then, if calling the HARQ process transmission data of the first data instruction in a certain subframe Or call whether do not receive the subframe yet at corresponding overtime subframe during the HARQ process transmission data of the second data instruction Corresponding HARQ feedback message, then may determine that feedback time-out occurs in the subframe.If for example, D0= [0001000100100001], wherein the first data are 0001, expression system have invoked HARQ in the subframe 0 of n-th radio frames Process 1 transmits data, and the second data are 0010, and expression system have invoked HARQ processes 2 in the subframe 0 of the N+1 radio frames and pass Transmission of data.If timeout threshold is 3 subframe lengths, it is contemplated that the general delay for having 2ms of internal system processing, then the latest should This receives corresponding HARQ feedback message at the subframe 2 of the N+1 radio frames, disappears if not receiving HARQ feedback yet at this time Breath, it is possible to judge feedback time-out occur when calling the HARQ processes of the first data instruction to carry out data transmission at subframe 0, The value of corresponding 3rd data of the first data should be made to add 1；Similarly, it should receive correspondence at the subframe 2 of the N+2 radio frames HARQ feedback message, if not receiving HARQ feedback message yet at this time, it is possible to judge at subframe 0 call the second data refer to There is time-out during the HARQ process transmission data shown, the value of corresponding 4th data of the second data should be made to add 1.It should be noted that by Each subframe has the distribution of uplink and downlink in TD LTE systems, if calculating that the obtained corresponding reception HARQ of certain subframe is anti-according to table 1 The subframe for presenting message is downlink subframe, then the subframe of actual reception HARQ feedback message is first behind the downlink subframe A sub-frame of uplink.
If the judging result of step S302 is when any subframe calls the HARQ process transmission data of the first data instruction There is feedback time-out, then perform step S303：By the first data the corresponding 3rd of the instruction data corresponding with the subframe The value of data adds 1；If the judging result of step S302 is to call the corresponding HARQ process transmissions number of the second data in any subframe According to when there is feedback time-out, then perform step S304：Second data of the instruction data corresponding with the subframe are corresponding The value of 4th data adds 1；If the judging result of step S302 occurs when calling HARQ process transmission data for no any subframe Feedback is overtime, then return to step S301 continues waiting for receiving HARQ feedback message.
The method that downlink HARQ feedback is handled in the LTE system of the present embodiment, can utilize institute according to HARQ feedback message The characteristics of data structure carries time scale is stated, corresponding indicated number is directly searched in data structure, and indicated number is carried out The operation of bit-level, can more fast and efficiently realize the processing of downlink HARQ feedback.In addition, carried using data structure The characteristics of time scale, without setting overtime timer to each subframe, just can quickly determine which subframe feedback occur in Time-out, so that system can make quick response, and starts re-transmission.
It should be noted that in the case of the disposal ability and resource of system are relatively large number of, can also be super by setting When timer mode, to realize overtime abnormal protection.Specifically：First, the corresponding overtime timer of each subframe is set, it is described Subframe numbers of the timeout threshold of overtime timer based on each subframe determine.It should be understood that call the HARQ of the first data instruction Corresponding time-out timing should all be started during process transmission data and when calling the HARQ process transmission data of the second data instruction Device, and the definite determination process that can refer to above-mentioned overtime subframe of the duration of overtime timer.When the first data of any subframe The timing length of corresponding overtime timer does not receive yet when being equal to corresponding timeout threshold calls the first data to refer in the subframe The HARQ feedback message for the HARQ process transmission data shown, then judge to call the HARQ processes of the first data instruction to pass in the subframe Occur feedback time-out during transmission of data, the value of corresponding 3rd data of the first data at this moment should be made to add 1；Similarly, when any subframe The timing length of the corresponding overtime timer of second data does not receive yet when being equal to corresponding timeout threshold calls the in the subframe The HARQ feedback message of the HARQ process transmission data of two data instruction, then judge to call the instruction of the second data in the subframe Occur feedback time-out during HARQ process transmission data, the value of corresponding 4th data of the second data at this moment should be made to add 1.Due under It is still the bit-level operation to data structure, therefore carrying out downlink HARQ feedback processing during the processing of row HARQ feedback When still have the advantages that fast and efficiently.
Example IV
As shown in Figure 10, the flow of the method to handle downlink HARQ feedback in the LTE system of the embodiment of the present invention four is shown It is intended to, including：
Step S400：Corresponding data structure C, the 5th data and the 6th data are set to intra cell communication terminal. Wherein, the structure of the data structure C refers to the data structure C in embodiment one, and the 5th data are used to indicate the free time The process number of HARQ processes, the 6th data are used to indicating the process numbers of HARQ processes to be retransmitted, the 5th data and 6th data are the number being made of bit.
LTE system is when being transmitted data dispatch, it will usually in free HARQ process selections, in the prior art, just Carried out by searching for free HARQ arrays or chained list, it was found from analysis above, lookup meeting to array or chained list Take many system resources.Which process number by the HARQ processes that can determine to have called up in data structure C is, then is tied The process number for the HARQ processes that syzygy system is supported, so that it may know the process number of the current free HARQ processes of system.For example, in C Indicate data C0The first data be not initial value, C7The first data and the second data be not initial value, then take C0 The value and C of the bit of one data7The bit value of the first data and the bit value of the second data, it is possible to know current The process number for the HARQ processes that system has called up, such as C0The first data value be equal to 1, C7The first data value be equal to 4, Second data are 5, if the process number for the HARQ processes that system is supported is 1~7 at this time, then the process number of free HARQ processes It is just 2,3,6,7.In order to make LTE system when being transmitted data dispatch, can it is more directly perceived, quickly obtain current system The process number of free HARQ processes, in the present embodiment, while any communication terminal sets data structure C in cell, Corresponding 5th data are also set up, for indicating the process number of free HARQ processes, its bit number included is supported with system HARQ processes quantity it is related.For example, when system supports 7 HARQ processes, the 5th data can be arranged to include 28（4 are multiplied by 7）The unsigned number of a bit, the value from low level to high-order every 4 bits are used to refer to a free HARQ process ID.For system in original state, all HARQ processes are all idle, and therefore, the initial value of the 5th data should include institute The process number of some HARQ processes, still exemplified by supporting the system of 7 HARQ processes, the initial value of the 5th data should be equal to [0111011001010100001100100001].After LTE system receives HARQ scheduling informations, it is possible to dispatch HARQ and believe The process number of the HARQ processes carried in breath removes from the 5th data, to represent that the HARQ processes have not been the state of free. Specifically, if instruction calls HARQ processes 1 to transmit at the subframe 0 of n-th radio frames in the HARQ scheduling informations received Data, at this moment can take out low 4 bits in the 5th data, then other bit bitwise shift rights four, the 5th data are just Be changed into [0000011101100101010000110010], it can be seen that the HARQ processes at this moment included in the 5th data into It is bit initial value that journey number, which is just changed into 2~7, highest 4, does not indicate the process number of any HARQ processes.It is it is of course also possible to logical Other methods commonly used in the art are crossed so that not including the HARQ processes of the calling indicated in HARQ scheduling informations in the 5th data Process number.
Similarly, in order to more intuitively reflect the process number of HARQ processes to be retransmitted, in the present embodiment, to small While any communication terminal sets data structure in area, corresponding 6th data are also set up, for indicating HARQ to be retransmitted The process number of process, its bit number included are related with the quantity for the HARQ processes that system is supported.For example, with the 5th data class Seemingly, when system supports 7 HARQ processes, the 6th data can be arranged to include 28（4 are multiplied by 7）A bit without symbol Number, the value from low level to high-order every 4 bits are used to refer to the process number of a re-transmission HARQ process.System is in original state When, all HARQ processes are all idle, and therefore, the initial value of the 6th data does not include the process number of any HARQ processes, The initial value of the 6th data could be provided as being equal to [0000000000000000000000000000] in the present embodiment, represent There is no any HARQ processes to be retransmitted during original state.
Setting to data structure C then may be referred to embodiment one, and details are not described herein again.
After step S400, step S401 is performed：When the HARQ feedback message for receiving any communication terminal, then according to HARQ feedback message is to the bit of instruction data is updated accordingly, while to the in the data structure C of the communication terminal Five data and the 6th data are configured.
Renewal to the corresponding bit than instruction data in data structure, refers to embodiment two, illustrates one here Under to the setting up procedure of the 5th data and the 6th data.Specifically, searched first in data structure anti-with the reception HARQ The corresponding instruction data of subframe numbers during message are presented, then according to the type of HARQ feedback message to the 5th data and the 6th data It is configured：If received HARQ feedback message is successful respond, the first data of the instruction data found are indicated The process number of HARQ processes is added to the corresponding bits position of the 5th data；If it is non-successful response to receive HARQ feedback message, The process number for the HARQ processes that first data of the instruction data found are indicated is added to the phase of the 6th data Answer bit.That is, when transmitting data success, just the HARQ processes called when transmitting data are discharged, and is put into In the 5th data for indicating free HARQ processes；When transmission data are unsuccessful, then need to retransmit the data, at this moment Just the process number of the HARQ processes of data call to be retransmitted is added in the 6th data, waits and retransmitting.If it should be understood that should After re-transmission data are rescheduled and retransmit, then the process number of the HARQ processes of calling should be removed from the 6th data.Still join The example in step S400 is examined, when corresponding HARQ is anti-when the subframe 0 of n-th radio frames calls HARQ processes 1 to transmit data When feedback message is ACK, C is read0In the first data bit value, and be added in the 5th data, such as with instruction Four bits covering C of HARQ processes 10Four bits of middle full 0, the 5th data are just changed into [0001011101100101010000110010], the process number of HARQ processes wherein included is 1~7；When wireless in n-th When corresponding HARQ feedback message is NACK when the subframe 0 of frame calls the transmission data of HARQ processes 1, just added in the 6th data 1 corresponding process number of HARQ processes, at this moment the 6th data just should be [0001000000000000000000000000]（Assuming that this When there is no other data to be retransmitted）, represent to call the data of HARQ processes 1 waiting re-transmission at this time.
The method that downlink HARQ feedback is handled in the LTE system of the present embodiment, can directly exist according to HARQ feedback message Corresponding indicated number is searched in data structure, and the operation of bit-level is carried out to indicated number, can more fast and efficiently be realized The processing of downlink HARQ feedback.In addition, in the present embodiment, there is provided the 5th data and use for indicating idle HARQ process In the 6th data for indicating HARQ processes to be retransmitted, it can more intuitively reflect that system waits what the data retransmitted were called The process number of HRAQ processes and the process number of idle HARQ process so that the scheduling of system and retransmission process are more simple Fast.
It should be understood that those skilled in the art can be by LTE system described by above-described embodiment one to example IV The method of middle processing downlink HARQ feedback carries out reasonable combination, to meet the different process demand of system.
Embodiment five
The device that downlink HARQ feedback is handled in a kind of LTE system is present embodiments provided, as shown in figure 11, including：Instead Present message reception units U10, storage unit U20, the first updating block U30, the first setting unit U40, the second updating block U50, the 3rd updating block U60 and the 4th updating block U70.Wherein, the feedback message receiving unit U10 is used to receive HARQ Feedback message.The storage unit U20, for storing the corresponding data structure of intra cell communication terminal, the data knot Structure includes n instruction data, each to indicate that data include the first data and the 3rd corresponding data, each to indicate that data further include Second data and the 4th corresponding data.Wherein, the first data that respectively instruction data include are used to indicate that each subframe passes The process number for the HARQ processes called during transmission of data, the 3rd data corresponding with first data are used to indicate to call the first data The number of the HARQ process transmission data of instruction, the second data that each instruction data include are used to indicate what each instruction data included Second data be used for the corresponding HARQ processes of the first data that indicate to call during each sub-frame transmission data be not released also and at this The process number for the HARQ processes called during new data is transmitted in subframe again, the 4th data corresponding with second data are used for Indicate call the second data instruction HARQ process transmission data number, first data, the second data, the 3rd data and 4th data be by bit group into number, n includes the number of subframe by a radio frames；First updating block U30, is used for When receiving the HARQ feedback message of any communication terminal, according to the HARQ feedback message in the storage unit U20 The bit of instruction data is updated accordingly in the data structure of the communication terminal；First setting unit U40, for based on The process number for the HARQ processes that HARQ scheduling informations indicate first data and the second data instruction HARQ processes into Journey number is configured, the HARQ of subframe numbers and calling when the HARQ scheduling informations are including calling HARQ process transmission data The process number of process；Second updating block U50, for when the 3rd data that any instruction data include in the data structure Value is more than the maximum transmission times that system allows and the second data of the instruction data when being initial value, by the of the instruction data All bits of one data and its corresponding 3rd data are reset；3rd updating block U60, for when in the data structure The value for the 3rd data that any instruction data include is more than the maximum transmission times that system allows and the second number of the instruction data During according to not being initial value, the value of the first data of the instruction data is set to refer to this equal to the value of the second data of the instruction data The value of corresponding 3rd data of the first data of registration evidence is equal to the value of corresponding 4th data of the second data of the instruction data, All bits of the second data of the instruction data and its corresponding 4th data are reset again；4th updating block U70, is used In when the value of the 4th data that any instruction data include in the data structure is more than the maximum transmission times that system allows, All bits of second data of the instruction data and its corresponding 4th data are reset.
Wherein, the first updating block U30 includes：Determination unit U301, for being disappeared based on the reception HARQ feedback Subframe numbers during breath determine the HARQ feedback message it is corresponding transmission data when subframe numbers；Second searching unit U302, is used for Transmission data corresponding with the HARQ feedback message are searched in the data structure of the communication terminal in the storage unit U20 When the corresponding instruction data of subframe numbers；First renewal subelement U303, described in corresponding to when the HARQ feedback message Indicate the first data of data, which finds described for successful respond and the second searching unit U302 When the second data for indicating data are not initial value, the value of the first data of the instruction data for making to find is equal to the instruction The value of second data of data, and all bits of the second data of the instruction data are reset；Or when the HARQ is anti- The first data that message corresponds to the instruction data are presented, which is successful respond and second searching unit When second data of the instruction data that U302 is searched are initial value, by the first data of the instruction data found All bits are reset；Or when the HARQ feedback message corresponds to the second data and the HARQ feedback of the instruction data Message is successful respond, then resets all bits of the second data of the instruction data found；Maintenance unit U304, for when the HARQ feedback message is non-successful response, maintaining the first data of the instruction data found With all bit invariant positions of the second data；Second renewal subelement U305, for being non-successful when the HARQ feedback message During response, if the HARQ feedback message corresponds to the first data of the instruction data found, by first data pair The value for the 3rd data answered adds 1, will if the HARQ feedback message corresponds to the second data of the instruction data found The value of corresponding 4th data of second data adds 1.
The first setting unit U40 includes：First searching unit U401, for searching in the data structure and institute State the corresponding instruction data of subframe numbers when calling HARQ process transmission data；Assignment unit U402, for looking into when described first When looking for the first data of the instruction data that unit U401 finds to be initial value, make the value of the first data of the instruction data Equal to the process number of the HARQ processes of the calling, or the instruction data found as the first searching unit U401 The first data when not being initial value, make the second data of the instruction data value be equal to the calling HARQ processes process Number.
In the present embodiment, the communication terminal the corresponding 5th that the storage unit U10 is additionally operable in storage cell counts It is used for the process number for indicating idle HARQ process according to the 6th data, the 5th data, the 6th data are treated for instruction The process number of the HARQ processes of re-transmission, the 5th data and the 6th data are the number being made of bit.Described device further includes Second setting unit U80, the 5th updating block U90 and the 6th updating block U100, wherein the second setting unit U80, for The first updating block U30 is counted while updating the bit of corresponding instruction data in the data structure to the described 5th Be configured according to the 6th data, the 5th updating block U90 be used for when any subframe call the first data instruction HARQ into There is feedback time-out in journey when passing transmission of data, by corresponding 3rd data of the first data of the instruction data corresponding with the subframe Value add 1；6th updating block U100, for going out in the corresponding HARQ process transmissions data of any subframe the second data of calling Now feedback time-out, adds 1 by the value of corresponding 4th data of the second data of the instruction data corresponding with the subframe.
LTE system in the present embodiment is TDD-LTE system, is particularly suitable in system corresponding most there are downlink subframe Small HARQ retransmits the application scenarios that interval is more than a wireless frame length.
Corresponding, the present embodiment also provides the dress that downlink HARQ feedback is handled in a kind of base station, including above-mentioned LTE system Put.
The device of downlink HARQ feedback is handled in the LTE system of the present embodiment and the specific implementation of base station refers to implement Example one is to example IV, and details are not described herein again.
It will be understood by those skilled in the art that all or part for realizing above-mentioned technical proposal is can be referred to by program Make relevant hardware complete, the program can be stored in readable storage medium storing program for executing, the storage medium can be ROM, RAM, magnetic disc, CD etc..
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, are not departing from this In the spirit and scope of invention, it can make various changes or modifications, therefore protection scope of the present invention should be with claim institute Subject to the scope of restriction.

Claims (22)

1. the method for downlink HARQ feedback is handled in a kind of LTE system, it is characterised in that including：
Corresponding data structure is set to intra cell communication terminal, and the data structure includes n instruction data, each instruction The first data that data include respectively indicate data packet for the process number for the HARQ processes for indicating to call during each sub-frame transmission data The second data included be used for the corresponding HARQ processes of the first data that indicate to call during each sub-frame transmission data be not released also and The process number for the HARQ processes called when transmitting new data again in the subframe, first data and the second data are The number being made of bit, n are included the number of subframe by a radio frames；
When the HARQ feedback message for receiving any communication terminal, then data according to the HARQ feedback message to the communication terminal The bit of instruction data is updated accordingly in structure；
The process number of the HARQ processes of the first data instruction and the process number of the HARQ processes of second data instruction are equal Set based on HARQ scheduling informations, the HARQ scheduling informations include calling the subframe numbers and tune during HARQ process transmission data The process number of HARQ processes.
2. the method for downlink HARQ feedback is handled in LTE system as claimed in claim 1, it is characterised in that first number The process number of the HARQ processes indicated according to the process number of the HARQ processes of instruction and second data is based on HARQ scheduling letters Breath setting includes：
Instruction data corresponding with the subframe numbers during calling HARQ process transmission data are searched in the data structure；
If the first data of the instruction data found are initial value, it is equal to the value of the first data of the instruction data The process number of the HARQ processes of the calling, otherwise make the instruction data the second data value be equal to the calling HARQ into The process number of journey.
3. the method for downlink HARQ feedback is handled in LTE system as claimed in claim 1, it is characterised in that described according to institute State HARQ feedback message in the data structure of the communication terminal accordingly instruction data bit be updated including：
Based on receive the HARQ feedback message when subframe numbers determine the HARQ feedback message it is corresponding transmission data when son Frame number；
Finger corresponding with the subframe numbers during transmission data of the HARQ feedback message is searched in the data structure of the communication terminal Registration evidence；
If the HARQ feedback message corresponds to the first data of the instruction data, the HARQ feedback message for successful respond and Second data of the instruction data are not initial value, then the value of the first data of the instruction data for making to find is equal to should Indicate the value of the second data of data, and all bits of the second data of the instruction data are reset；
If the HARQ feedback message corresponds to the first data of the instruction data, the HARQ feedback message for successful respond and Second data of the instruction data are initial value, then by all bits of the first data of the instruction data found Reset；
If it is successful respond that the HARQ feedback message, which corresponds to the second data of the instruction data and the HARQ feedback message, Then all bits of the second data of the instruction data found are reset；
If the HARQ feedback message is non-successful response, the first data and second of the instruction data found are maintained All bit invariant positions of data.
4. the method for downlink HARQ feedback is handled in LTE system as claimed in claim 3, it is characterised in that respectively indicate data Further include the 3rd data corresponding with each first data and the 4th data corresponding with each second data, the 3rd number According to the number of the HARQ process transmission data for indicating to call the instruction of the first data, the 4th data are used to indicate to call the The number of the HARQ process transmission data of two data instruction, the 3rd data and the 4th data are the number being made of bit；Institute State according to the HARQ feedback message to the bit of instruction data is updated accordingly in the data structure of the communication terminal Further include：When the HARQ feedback message is non-successful response, if the HARQ feedback message corresponds to the finger found First data of registration evidence, then add 1 by the value of corresponding 3rd data of first data, is looked into if the HARQ feedback message corresponds to Second data of the instruction data found, then add 1 by the value of corresponding 4th data of second data.
5. the method for downlink HARQ feedback is handled in LTE system as claimed in claim 4, it is characterised in that further include：
If the value for the 3rd data that any instruction data include is more than the maximum transmission times that system allows in the data structure And the second data of the instruction data are initial value, then by the institute of the first data of the instruction data and its corresponding 3rd data There is bit replacement；
If the value for the 3rd data that any instruction data include is more than the maximum transmission times that system allows in the data structure And the second data of the instruction data are not initial value, then the value of the first data of the instruction data is set to be equal to the instruction data The value of second data, makes the value of corresponding 3rd data of the first data of the instruction data be equal to the second data of the instruction data The value of corresponding 4th data, then all bits of second data and its corresponding 4th data are reset；
If the value for the 4th data that any instruction data include is more than the maximum transmission times that system allows in the data structure, Then all bits of the second data of the instruction data and its corresponding 4th data are reset.
6. the method for downlink HARQ feedback is handled in LTE system as claimed in claim 4, it is characterised in that further include：
, will be with the subframe if occurring feedback time-out when any subframe calls the HARQ process transmission data of the first data instruction The value of corresponding 3rd data of the first data of the corresponding instruction data adds 1；
, will be with the subframe if there is feedback time-out in the corresponding HARQ process transmissions data of any subframe the second data of calling The value of corresponding 4th data of the second data of the corresponding instruction data adds 1.
7. the method for downlink HARQ feedback is handled in LTE system as claimed in claim 6, it is characterised in that judge any Subframe calls the step for occurring feedback time-out during HARQ process transmission data to include：
The corresponding overtime timer of each subframe is set, and subframe numbers of the timeout threshold of the overtime timer based on each subframe are true It is fixed；
When any subframe calls HARQ process transmission data, start corresponding overtime timer；
If the timing length of the overtime timer do not received yet when being equal to corresponding timeout threshold the subframe call HARQ into Journey passes the HARQ feedback message of transmission of data, then judges feedback time-out occur in the subframe.
8. the method for downlink HARQ feedback is handled in LTE system as claimed in claim 6, it is characterised in that judge any Subframe calls the step for occurring feedback time-out during HARQ process transmission data to include：
If do not received yet in the subframe at its corresponding overtime subframe after any subframe calls HARQ process transmission data The HARQ feedback message of HARQ process transmission data is called, then judges feedback time-out occur in the subframe, the time-out subframe The subframe numbers that subframe numbers are equal to when each subframe is corresponding to receive HARQ feedback message add timeout threshold, and the timeout threshold is equal to m A subframe lengths, m ∈ [0,3].
9. the method for downlink HARQ feedback is handled in LTE system as claimed in claim 1, it is characterised in that further include：
Corresponding 5th data and the 6th data are set to intra cell communication terminal, and the 5th data are used to indicate the free time The process number of HARQ processes, the 6th data are used to indicating the process numbers of HARQ processes to be retransmitted, the 5th data and 6th data are the number being made of bit；
To the 5th data and the 6th data while the bit of corresponding instruction data in updating the data structure It is configured.
10. the method for downlink HARQ feedback is handled in LTE system as claimed in claim 9, it is characterised in that described to update Bag is configured to the 5th data and the 6th data while the bit for indicating data in the data structure accordingly Include：
Searched in data structure corresponding with the communication terminal corresponding with subframe numbers when receiving the HARQ feedback message Indicate data；
If it is successful respond to receive HARQ feedback message, by the HARQ of the first data instruction of the instruction data found The process number of process is added to the corresponding bits position of the 5th data；
If it is non-successful response to receive HARQ feedback message, the first data of the instruction data found are indicated The process number of HARQ processes is added to the corresponding bits position of the 6th data.
11. the method for downlink HARQ feedback is handled in LTE system as claimed in claim 9, it is characterised in that the 5th number The quantity for the HARQ processes supported according to the digit of the bit included with the 6th data based on the LTE system is determined.
12. the method for downlink HARQ feedback is handled in LTE system as claimed in claim 11, it is characterised in that the LTE systems Unite and determined for TDD-LTE system, the quantity of the HARQ processes of the support by the uplink-downlink configuration of TDD-LTE system.
13. the method for downlink HARQ feedback is handled in LTE system as claimed in claim 1, it is characterised in that the LTE systems Unite for TDD-LTE system and its there are the corresponding minimum HARQ of downlink subframe to retransmit interval to be more than a wireless frame length.
14. the device of downlink HARQ feedback is handled in a kind of LTE system, it is characterised in that including：
Storage unit, for storing the corresponding data structure of intra cell communication terminal, the data structure includes n instruction Data, each the first data for indicating data and including are used to indicating the process number for the HARQ processes called during each sub-frame transmission data, The second data that each instruction data include are used to indicate the corresponding HARQ processes of the first data called during each sub-frame transmission data The process number for the HARQ processes for not being released also and being called when transmitting new data in the subframe, first data and Second data be by bit group into number, n includes the number of subframe by a radio frames；
First updating block, for when receiving the HARQ feedback message of any communication terminal, according to the HARQ feedback message To the bit of instruction data is updated accordingly in the data structure of the communication terminal in the storage unit；
First setting unit, for the process number and of the HARQ processes indicated based on HARQ scheduling informations first data The process number of the HARQ processes of two data instruction is configured, and the HARQ scheduling informations include calling HARQ process transmission data When subframe numbers and calling HARQ processes process number.
15. the device of downlink HARQ feedback is handled in LTE system as claimed in claim 14, it is characterised in that described first Setting unit includes：
First searching unit, for searching in the data structure and the subframe numbers during calling HARQ process transmission data Corresponding instruction data；
Assignment unit, when the first data of the instruction data for being found when first searching unit are initial value, Make the value of the first data of the instruction data equal to the process number of the HARQ processes of the calling, or when the described first lookup is single When first data of the instruction data that member is found are not initial value, the value of the second data of the instruction data is set to be equal to institute State the process number of the HARQ processes of calling.
16. the device of downlink HARQ feedback is handled in LTE system as claimed in claim 14, it is characterised in that described first Updating block includes：
Determination unit, for determining the corresponding biography of HARQ feedback message based on subframe numbers when receiving the HARQ feedback message Subframe numbers during transmission of data；
Second searching unit, for being searched and the HARQ feedback in the data structure of the communication terminal in the storage unit Message it is corresponding transmission data when the corresponding instruction data of subframe numbers；
First renewal subelement, for corresponding to the first data of the instruction data, the HARQ when the HARQ feedback message Feedback message is that the second data of the instruction data that successful respond and second searching unit are found are not initial value When, the value of the first data of the instruction data for making to find is equal to the value of the second data of the instruction data, and this is referred to All bits of second data of registration evidence are reset；Or when the HARQ feedback message corresponds to the of the instruction data One data, the second data of the instruction data which searches for successful respond and second searching unit For initial value when, all bits of the first data of the instruction data found are reset；Or when the HARQ is anti- Present message correspond to it is described instruction data the second data and the HARQ feedback message be successful respond, then will find described in Indicate that all bits of the second data of data are reset；
Maintenance unit, for the instruction data that when the HARQ feedback message is non-successful response, maintain to find All bit invariant positions of first data and the second data.
17. the device of downlink HARQ feedback is handled in LTE system as claimed in claim 16, it is characterised in that the storage Each instruction data in unit further include the 3rd data corresponding with each first data and corresponding with each second data 4th data, the 3rd data are used for the number for indicating to call the HARQ process transmission data of the first data instruction, and described the Four data are used for the number for indicating to call the HARQ process transmission data of the second data instruction, the 3rd data and the 4th data For the number being made of bit；First updating block further includes the second renewal subelement, for when the HARQ feedback message For non-successful response when, if the HARQ feedback message corresponds to the first data of the instruction data found, by this The value of corresponding 3rd data of one data adds 1, if the HARQ feedback message corresponds to the second of the instruction data found Data, then add 1 by the value of corresponding 4th data of second data.
18. the device of downlink HARQ feedback is handled in LTE system as claimed in claim 17, it is characterised in that further include：
Second updating block, for permitting when the value of the 3rd data that any instruction data include in the data structure more than system Perhaps when maximum transmission times and the second data of the instruction data are initial value, by the first data of the instruction data and its right All bits for the 3rd data answered are reset；
3rd updating block, for permitting when the value of the 3rd data that any instruction data include in the data structure more than system Perhaps when maximum transmission times and the second data of the instruction data are not initial value, the value of the first data of the instruction data is made Equal to the value of the second data of the instruction data, the value of corresponding 3rd data of the first data of the instruction data is set to refer to equal to this The value of corresponding 4th data of the second data of registration evidence, then by the second data of the instruction data and its corresponding 4th data All bits reset；
4th updating block, for permitting when the value of the 4th data that any instruction data include in the data structure more than system During maximum transmission times perhaps, all bits of the second data of the instruction data and its corresponding 4th data are reset.
19. the device of downlink HARQ feedback is handled in LTE system as claimed in claim 17, it is characterised in that further include：
5th updating block, for being fed back when calling the HARQ process transmission data of the first data instruction in any subframe Time-out, adds 1 by the value of corresponding 3rd data of the first data of the instruction data corresponding with the subframe；
6th updating block is super for there is feedback in the corresponding HARQ process transmissions data of any subframe the second data of calling When, the value for the 4th data that the second data of the instruction data corresponding with the subframe are indicated adds 1.
20. the device of downlink HARQ feedback is handled in LTE system as claimed in claim 14, it is characterised in that the storage Unit is additionally operable to corresponding 5th data of communication terminal and the 6th data in storage cell, and the 5th data are used to refer to Show the process number of idle HARQ process, the 6th data are used for the process number for indicating HARQ processes to be retransmitted, and the described 5th Data and the 6th data are the number being made of bit；
The device of the processing downlink HARQ feedback further includes the second setting unit, for updating institute in first updating block The 5th data and the 6th data are configured while stating the bit for indicating data in data structure accordingly.
21. the device of downlink HARQ feedback is handled in LTE system as claimed in claim 14, it is characterised in that the LTE systems Unite for TDD-LTE system and its there are the corresponding minimum HARQ of downlink subframe to retransmit interval to be more than a wireless frame length.
22. a kind of base station, it is characterised in that including handling downlink in claim 14 to 21 any one of them LTE system The device of HARQ feedback.
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