CN103248454B - Coding/decoding method in communication system and decoding device, communication terminal - Google Patents
Coding/decoding method in communication system and decoding device, communication terminal Download PDFInfo
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Abstract
Coding/decoding method in a kind of communication system and decoding device, communication terminal, wherein, coding/decoding method comprises: receive the transport block data after descrambling, matched data is obtained to data solution secondary rate coupling after predetermined quantity descrambling and is stored in the first spatial cache, if data retransmission, then read the Backup Data of the predetermined number corresponding with data retransmission again from the second spatial cache, obtain merging data after merging with the matched data of data retransmission, and be stored in the first spatial cache; Read and be currently stored in the first spatial cache matched data or merging data, carry out solution first time rate coupling, channel-decoding; After solution first time rate coupling, the matched data of the current predetermined quantity be stored in the first spatial cache or merging data are backed up to described second spatial cache, then the matched data of follow-up predetermined quantity or merging data is stored in the first spatial cache.Spatial cache in the sheet that the technical program not only saves communication terminal, also reduces the overall decoding delay of communication terminal.
Description
Technical field
The present invention relates to mobile communication technology field, the coding/decoding method particularly in communication system and decoding device, communication terminal.
Background technology
Along with the development of mobile communication technology, people also improve for the quality of mobile communication and the requirement of type of service that provides thereof thereupon.The proposition of the Long Term Evolution (LongTermEvolution, LTE) of 3G (Third Generation) Moblie (3G) and 3G and development have met this demand of people.
According to third generation partner program (The3rdGenerationPartnershipProject, 3GPP) agreement regulation, the enhancing technology that introducing one is important in 3-G (Generation Three mobile communication system), i.e. high-speed slender body theory (HighSpeedDownlinkPacketAccess, HSDPA), the high speed business of HSDPA is mainly carried on high speed descending sharing channel (HighSpeedDownlinkShareChannel, HS-DSCH), this is the dedicated transmission channel of the high speed business of HSDPA.High-speed downstream control channel (HighSpeedSharedControlChannel, HS-SCCH) be the Dedicated Control Channel of HSDPA, it is a physical channel, for carrying all relevant bottom control information, that is, the data that terminal will receive according to the control information of HS-SCCH channel from HS-DSCH channel, and according to this control information, a series of process is carried out to data, comprise demodulation, deinterleaving, descrambling, rate de-matching, decoding and verification etc.
At TD SDMA (TimeDivision-SynchronousCodeDivisionMultipleAccess, TD-SCDMA) in communication system, due to the impact of the factor such as wireless transmission environments, signal disturbing, terminal is not often once just can complete in reception process data procedures, when there is decoding error, also need transmitting terminal (being generally base station) to resend data, terminal receives process again, i.e. data re-transmission.And in order to reduce meaningless data re-transmission, in TD-SCDMA system, be usually provided with maximum retransmission, namely just no longer proceed when data re-transmission reaches maximum retransmission, thus terminate the transmission of whole data, reception and processing procedure.In TD-SCDMA communication system, usually adopt hybrid automatic repeat-request (HybridAutomaticRepeatRequest, HARQ) technology to improve capacity and the efficiency of system.When base station or terminal decoding error, can notify that opposite end is by data re-transmitting, the data retransmission received and the data that receive before carry out merging to improve signal to noise ratio by base station or terminal, thus obtain and merge gain and improve receptivity.
In the prior art, for TD-SCDMA communication system, receiving terminal (such as mobile terminal) is receiving the HSDPA data of HS-DSCH channel of the subframe (5 milliseconds) that transmitting terminal (being such as base station) sends, first after carrying out joint-detection demodulation, the soft Bit data of this subframe is done deinterleaving process (De-interleave), carry out descrambling (De-scramble) afterwards, then do to separate secondary rate coupling (De-2ndratematch), result cache is entered the system level chip (SystemonChip of receiving terminal, SOC) the incremental redundancy buffer memory (IncrementalredundancyBuffer in, IRBuffer), IRBuffer in this SOC sheet is data cached for the IR depositing current HARQ procedure.
If this secondary data is data retransmission, from the IRBuffer (IR depositing all HARQ procedure is data cached) SOC sheet, then read in last incremental redundancy merge this secondary data (i.e. data retransmission) that the IRBuffer in the Backup Data of (IRCombine) and SOC sheet stores and make IR and merge, again merging data is backed up to the IRBuffer outside SOC sheet, afterwards the merging data that the IRBuffer in SOC sheet preserves is carried out solution first time rate coupling (De-lstratematch), channel-decoding (ChannelDecode) and CRC check (CRCCheck) is carried out again after completing.If this secondary data is new data (data namely sent first), then do not make IR to these data to merge, but the IRBuffer backed up to after directly the new data that the IRBuffer in SOC sheet preserves being done to separate secondary rate coupling outside SOC sheet, afterwards the solution secondary rate matched data that the IRBuffer in current SOC sheet preserves is carried out solution first time rate coupling (De-lstratematch), after completing, carry out channel-decoding (ChannelDecode) and CRC check (CRCCheck) again.
The data of usually preserving the IRBuffer in SOC sheet carry out solution secondary rate coupling and IR merging and solution first time rate is afterwards mated and channel-decoding is that serial performs, namely a subframe data disposable complete separate secondary rate coupling and IR merging after, and then do to separate first time rate coupling and channel-decoding according to the code block data (CodeBlock, CB) in this subframe one by one.Adopt in this way, the IRBuffer in SOC sheet is made to be enough to store solution secondary rate matched data or the IR merging data of whole subframe (5 milliseconds) with regard to needing, occupy the spatial cache in more SOC sheet, too increase the overall decoding delay of receiving terminal.
More denominations of invention that can be US2007168821A1 with reference to publication number about the coding/decoding method in communication system are the U.S. Patent application file of " ArqControlInAnHsdpaCommunicationsSystem (arq in high-speed downlink packet access communication system controls) ", but still do not solve the problem.
Summary of the invention
The problem that the present invention solves reduces the spatial cache in communication terminal in SOC sheet, and reduce the decoding delay of communication terminal entirety.
For solving the problem, embodiments providing the coding/decoding method in a kind of communication system, for decoding to the business datum of descending transmission channel, comprising: receive the transport block data after descrambling, wherein said transport block data comprises code block data; In units of the code block data of predetermined quantity, carry out solution secondary rate coupling obtain matched data; If the described transport block data be currently received is new data, then the matched data of the code block data of predetermined quantity is stored in the first spatial cache; If the described transport block data be currently received is data retransmission, by the matched data of the code block data of predetermined quantity be stored in Backup Data corresponding with described matched data in the second spatial cache and merge and obtain merging data and be stored in described first spatial cache; Solution first time rate coupling and channel-decoding are carried out to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data; After the matched data of the code block data to the current predetermined quantity be stored in described first spatial cache or merging data carry out solution first time rate coupling, the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data are backed up to described second spatial cache, then the matched data of the code block data of follow-up predetermined quantity or merging data is stored in described first spatial cache.
Alternatively, the matched data of the described code block data to the current predetermined quantity be stored in described first spatial cache or merging data carry out channel-decoding and the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data are backed up to described second spatial cache executed in parallel.
Alternatively, the matched data of the described code block data to the current predetermined quantity be stored in described first spatial cache or merging data carry out channel-decoding and the matched data of the code block data of follow-up predetermined quantity or merging data are stored in described first spatial cache executed in parallel.
Alternatively, determine that the described transport block data be currently received is new data or data retransmission according to the indication information of the down control channel corresponding with described descending transmission channel.
Alternatively, Backup Data corresponding with described matched data in described second spatial cache is matched data or the merging data of the code block data of the predetermined quantity backed up in described second spatial cache, and described code block data is at check errors after channel-decoding.
Alternatively, the matched data of the code block data of described predetermined quantity is that incremental redundancy merges with being stored in the mode that Backup Data corresponding with described matched data in the second spatial cache merges.
Alternatively, described predetermined quantity is 1-3.
Alternatively, described first spatial cache is for storing matched data or the merging data of the code block data of predetermined quantity; Described second spatial cache is for backing up matched data or the merging data of all code block data in described transport block data.
Alternatively, described transport block data is soft Bit data.
Alternatively, described communication system is TD-SCDMA communication system.
Alternatively, described descending transmission channel is high-speed downlink shared channel, and described business datum is high speed descending grouping access data.
The embodiment of the present invention additionally provides a kind of decoding device of communication system, for decoding to the business datum of descending transmission channel, comprising: receiving element, and for receiving the transport block data after descrambling, wherein said transport block data comprises code block data; Separate secondary rate matching unit, the code block data for the predetermined quantity received described receiving element carries out solution secondary rate coupling and obtains matched data; Data processing unit, the described transport block data for being currently received at described receiving element is new data, then the matched data of the code block data after the process of described solution secondary rate matching unit of predetermined quantity is stored in the first spatial cache; The described transport block data be currently received at described receiving element is data retransmission, the matched data of the code block data of the predetermined quantity after the process of described solution secondary rate matching unit is stored in Backup Data corresponding with described matched data in the second spatial cache and merging obtains merging data and is stored in described first spatial cache; Decoding unit, carries out solution first time rate coupling and channel-decoding for the matched data of the code block data to the current predetermined quantity be stored in described first spatial cache or merging data; Backup units, for after described decoding unit carries out solution first time rate coupling to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data, the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data are backed up to described second spatial cache, then by described data processing unit, the matched data of the code block data of follow-up predetermined quantity or merging data is stored in described first spatial cache.
The embodiment of the present invention additionally provides a kind of communication terminal, comprises the decoding device of above-mentioned communication system.
Compared with prior art, technical solution of the present invention has following beneficial effect:
Solution secondary rate coupling is carried out to the code block data of the predetermined quantity after descrambling and obtains matched data, if the transport block data be currently received is new data, then the matched data of the code block data of predetermined quantity is stored in the first spatial cache; If the transport block data be currently received is data retransmission, by the matched data of the code block data of predetermined quantity be stored in Backup Data corresponding with described matched data in the second spatial cache and merge and obtain merging data and be stored in described first spatial cache.In described first spatial cache, only need the code block data storing predetermined quantity like this, and do not need to store whole transport block data, thus save described first spatial cache.
Further, in the first spatial cache current store the code block data of predetermined quantity after, just can carry out solution first time rate coupling and channel-decoding to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data, after the matched data of the code block data to the current predetermined quantity be stored in described first spatial cache or merging data carry out solution first time rate coupling, the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data are backed up to described second spatial cache, so just vacate described first spatial cache, the matched data of the code block data of follow-up predetermined quantity or merging data is supplied to be stored in described first spatial cache, recycle the time delay that the first spatial cache makes to also reduce the decoding of communication terminal entirety while saving described first spatial cache like this.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the embodiment of the coding/decoding method of a kind of communication system of the present invention;
Fig. 2 is the schematic diagram of TD-SCDMA physical channel frame structure;
Fig. 3 is the schematic block diagram of the decoding process of HS-DSCH channel in TD-SCDMA communication system of the present invention;
Fig. 4 is the structural representation of the specific embodiment of the decoding device of a kind of communication system of the present invention.
Embodiment
For the problem of prior art, inventor is through research, provide a kind of coding/decoding method of communication system, for decoding to the business datum of descending transmission channel, the technical program achieves carries out saving described first spatial cache (spatial cache in SOC sheet) in the process of decoding at communication terminal, and recycles the time delay that the first spatial cache makes to also reduce the decoding of communication terminal entirety while saving described first spatial cache.
For enabling above-mentioned purpose of the present invention, feature and advantage more become apparent, and are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
Set forth detail in the following description so that fully understand the present invention.But the present invention can be different from alternate manner described here to implement with multiple, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention.Therefore the present invention is not by the restriction of following public embodiment.
The schematic flow sheet of the embodiment of the coding/decoding method of of the present invention a kind of communication system as shown in Figure 1.With reference to figure 1, described coding/decoding method is used for decoding to the business datum of descending transmission channel, comprising:
Step S1: receive the transport block data after descrambling, wherein said transport block data comprises code block data;
Step S2: carry out solution secondary rate coupling and obtain matched data in units of the code block data of predetermined quantity;
Step S3: if the described transport block data be currently received is new data, then the matched data of the code block data of predetermined quantity is stored in the first spatial cache; If the described transport block data be currently received is data retransmission, by the matched data of the code block data of predetermined quantity be stored in Backup Data corresponding with described matched data in the second spatial cache and merge and obtain merging data and be stored in described first spatial cache;
Step S4: solution first time rate coupling and channel-decoding are carried out to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data;
Step S5: after the matched data of the code block data to the current predetermined quantity be stored in described first spatial cache or merging data carry out solution first time rate coupling, the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data are backed up to described second spatial cache, then the matched data of the code block data of follow-up predetermined quantity or merging data is stored in described first spatial cache.
In specific embodiment hereafter, with described communication system for TD-SCDMA communication system, described descending transmission channel is high-speed downlink shared channel (HS-DSCH), the down control channel corresponding with described descending transmission channel is high-speed downstream control channel (HS-SCCH), described business datum is that high-speed slender body theory (HSDPA) data instance is described, but is not limited to this in actual applications.
Embodiments of the invention for convenience of explanation, the frame structure first for TD-SCDMA is described.The schematic diagram of TD-SCDMA physical channel frame structure as shown in Figure 2.
Particularly, as shown in Figure 2, a wireless frame length T
ffor 10ms (millisecond), comprise 2 wireless sub-frames, each wireless sub-frame T
sfor 5ms.Each subframe comprises 7 main time slots (i.e. time slot 0, time slot 1, time slot 2 ..., time slot 6) and 3 special time slots (are respectively descending pilot frequency time slot, protection interval and uplink pilot time slot; indicate with DwPTS, Gp, UpPTS respectively in Fig. 2), wherein said 3 special time slots are successively between time slot 0 and time slot 1.In the present embodiment, transmitting terminal (being generally base station) with a subframe (5ms) for periodic scheduling HS-DSCH channel, for transmitting HSDPA data; Process at the indication information of receiving terminal (communication terminal) according to the HS-SCCH channel corresponding with described HS-DSCH channel, comprise demodulation, deinterleaving process, descrambling, solution secondary rate coupling, separate first time rate coupling, channel-decoding and verification etc.
Below in conjunction with the schematic block diagram of the decoding process of HS-DSCH channel in the TD-SCDMA communication system shown in Fig. 3, the coding/decoding method of the communication system described in Fig. 1 is described.
As described in step S1, receive the transport block data after descrambling, wherein said transport block data comprises code block data.
Particularly, receiving terminal (communication terminal), after receiving the business datum that transmitting terminal (base station) sends, first will carry out joint-detection demodulation 11 to this business datum.Those skilled in the art know, and because in TD-SCDMA communication system, the signal of multiple users of transmitting terminal transmission is aliasing in time domain and frequency domain, signal aloft transmitting procedure also can be subject to the interference (such as noise) of external environment; Therefore receiving terminal needs to carry out joint-detection upon receipt of the signal, namely signal separating method is utilized to be come by the Signal separator of each user, also need to overcome intersymbol interference and multi-access inference, then carry out demodulation, from signal, namely recover wherein entrained information.
Then, carry out deinterleaving process 12, merge owing to systematic bits and each check bit being formed bit according to certain rule intertexture in the business datum that transmitting terminal sends; Then must recover data by deinterleaving at receiving terminal, the data merged by bit are divided into systematic bits and check bit again.In the present embodiment, described business datum is HSDPA data, this business datum is sent to receiving terminal with the form of Turbo code by transmitting terminal, described Turbo code comprises systematic bits, the first check bit and the second check bit, so after deinterleaving process 12, this business datum is correspondingly divided into systematic bits, the first check bit and the second check bit.Then, carry out descrambling 13, carry out descrambling, to recover original business datum by the business datum after the scrambling that transmitting terminal sends.Above-mentioned joint-detection demodulation, deinterleaving process and descrambling are techniques well known, and therefore not to repeat here for its detailed process.
In the present embodiment, receiving terminal is for the cycle receives described business datum with each subframe, each subframe comprises a transmission block (TB, Transportblock) data, according to relevant communication protocol, described transport block data is divided into several encoding block (CB, CodeBlock) data.Therefore, in the present embodiment, in units of transport block data, carry out joint-detection demodulation, deinterleaving process and descrambling after receiving terminal receives business datum, and comprise multiple code block data in this transport block data, described transport block data is soft Bit data.
As described in step S2, in units of the code block data of predetermined quantity, carry out solution secondary rate coupling obtain matched data.
Unlike the prior art, the transport block data after descrambling is carried out separate secondary rate mate 14 time be carry out in units of the code block data of predetermined quantity, particularly, can be solution secondary rate coupling is carried out to the code block data of predetermined quantity at every turn, each described code block data obtains corresponding matched data after separating secondary rate coupling, therefore be also process in units of the code block data of predetermined quantity in subsequent process, thus reduce the memory capacity of buffer memory (the first spatial cache 21) in sheet.Described predetermined quantity is less than the sum of the code block data in a transport block data.Those skilled in the art know, transmitting terminal is when sending business datum, due to the scheduling for adapting to wireless environment variation, be carried on business datum on a transmission channel (in the present embodiment for HS-DSCH channel) at different Transmission Time Interval (TransmissionTimeInterval, TTI) different radio bearer modes may be adopted (as different channel encoding rates in, modulation system and physical channel resources), for different radio bearer modes, bits of traffic data will be repeated or be punched after chnnel coding, total bit rate after making transmission channel multiplexing matches with the resource of the DPCH of distributing (being HS-DSCH channel in the present embodiment), therefore transmitting terminal carries out rate-matched process by sent business datum.Correspondingly, just need to do rate de-matching process at receiving terminal, i.e. the inverse process of rate-matched process.In this step, be that unit carries out solution secondary rate coupling 14 to obtain corresponding matched data to the code block data of the predetermined quantity according to this of the number of transport blocks after descrambling, the concrete processing procedure of wherein said solution secondary rate coupling is known to the skilled person technology, does not repeat them here.
As described in step S3, if the described transport block data be currently received is new data, then the matched data of the code block data of predetermined quantity is stored in the first spatial cache; If the described transport block data be currently received is data retransmission, by the matched data of the code block data of predetermined quantity be stored in Backup Data corresponding with described matched data in the second spatial cache and merge and obtain merging data and be stored in described first spatial cache.
Particularly, receiving terminal, when demodulating and decoding is carried on the business datum of descending transmission channel, needs to process according to the indication information of the down control channel corresponding with described descending transmission channel.In the present embodiment, described descending transmission channel is HS-DSCH channel, and the down control channel corresponding with described HS-DSCH channel is HS-SCCH channel.Therefore, receiving terminal first wants the HS-SCCH channel of demodulating and decoding present sub-frame (in other words current transmission blocks of data), and processes described transport block data according to the indication information of described HS-SCCH channel.Wherein, described indication information comprises HARQ procedure numbering (HARQprocessinformation) and new data instruction (Newdataindicator), according to HARQ procedure, receiving terminal numbers the HS-DSCH channel transmission data determined belongs to which HARQ procedure, according to new data instruction determine send be new data or data retransmission.
In this step, if the described transport block data be currently received is new data, then the matched data of the code block data of predetermined quantity is stored in the first spatial cache 21.Wherein, described first spatial cache 21 is the memory space in the system level chip (SOC) of receiving terminal, further, described first spatial cache 21 is divided into three parts, deposits the systematic bits of the matched data (Turbo code) of code block data, the first check bit and the second check bit respectively.
The matched data of the described code block data of predetermined quantity is stored in the first spatial cache 21 can be used in subsequent treatment read described matched data carry out solution first time rate coupling 15, and then channel-decoding 16 is carried out to the code block data after separating first time rate coupling, in the present embodiment, described predetermined quantity is 1-3, preferably, described predetermined quantity is 1, namely one by one the matched data of described code block data is stored in described first spatial cache 21, the memory capacity of described first spatial cache 21 can be reduced so to greatest extent.
In this step, if according to the indication information of described HS-SCCH channel, receiving terminal determines that the described transport block data be currently received is data retransmission, by the matched data of the code block data of the predetermined quantity of described data retransmission (transport block data) be stored in Backup Data corresponding with described matched data in described second spatial cache 22 and carry out merging and obtain merging data and be stored in described first spatial cache 21.
In the present embodiment, described second spatial cache 22 is system level chip (SOC) memory space outward of receiving terminal, has backed up matched data or the merging data of all code block data in the transport block data of all described HARQ procedure in described second spatial cache 22.Therefore, if the transport block data be currently received is data retransmission, then by the matched data of the code block data of predetermined quantity in described data retransmission with back up to Backup Data corresponding with described matched data in described second spatial cache 22 and carry out merging and obtain merging data.
Specifically, the HARQ procedure number comprised according to described indication information can determine that the transport block data be currently received is the data retransmission of which HARQ procedure.It should be noted that, due in TD-SCDMA communication system, only has transport block data with check code (cyclic redundancy check (CRC) code), and code block data does not comprise check code, therefore, after channel-decoding 16 is carried out to the code block data of predetermined quantity, need until just carry out verification 17 (cyclic redundancy check (CRC)) when the number of described code block data is enough to a formation transport block data.
Then, as described in step S2, be that unit carries out solution secondary rate coupling and obtains matched data to described data retransmission according to the code block data of predetermined quantity successively, namely obtain the matched data of described data retransmission; Further, from described second spatial cache 22, read the Backup Data corresponding with the matched data of described predetermined quantity, and carry out being stored in described first spatial cache 21 again after merging obtains merging data with the matched data of the code block data of predetermined quantity in described data retransmission.In the present embodiment, the mode of described merging is that incremental redundancy merges (IRcombine), it is data retransmission and Backup Data are carried out being added merging obtain merging data that described incremental redundancy merges, the detailed process that described incremental redundancy merges is known to the skilled person technology, does not repeat them here.
In the present embodiment, in described second spatial cache 22, the Backup Data corresponding with described matched data is matched data (first backs up to the data in described second spatial cache 22) or the merging data (data before after one or many merges) of the code block data of the predetermined quantity backed up in described second spatial cache 22, and described code block data is at check errors after channel-decoding.That is, the matched data of the described code block data of the predetermined quantity be stored in the first spatial cache 21 or merging data being backed up to described second spatial cache 22 is to when check errors, merge as Backup Data and follow-up data retransmission after separating first time rate coupling, channel-decoding follow-up in the transport block data be currently received.
In other embodiments, such as, in TD-LTE communication system, not only transport block data is with check code, and each code block data in described transport block data also respectively carries check code.Therefore, after channel-decoding 16 is carried out to the code block data of predetermined quantity, can verify code block data one by one, as long as check errors appears in one of them code block data, then determine described transport block data decoding error.Receiving terminal sends whether correctly receive mark in the regulation moment to transmitting terminal.The transport block data of check errors then can resend to receiving terminal according to mark by transmitting terminal.If after receiving terminal is currently received this data retransmission, be that unit carries out solution secondary rate coupling and obtains matched data to described data retransmission according to the code block data of predetermined quantity equally successively; Further, from described second spatial cache 22, read the Backup Data corresponding with described matched data, and the matched data of the code block data of the predetermined quantity of described Backup Data and described data retransmission is carried out being stored in described first spatial cache 21 again after merging obtains merging data.
Similarly, in the present embodiment, the mode of described merging is that incremental redundancy merges (IRcombine), it is data retransmission and Backup Data are carried out being added merging obtain merging data that described incremental redundancy merges, the detailed process that described incremental redundancy merges is known to the skilled person technology, does not repeat them here.
As described in step S4, solution first time rate coupling 15 and channel-decoding 16 are carried out to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache 21 or merging data.
In the present embodiment, as long as when storing matched data or the merging data of predetermined quantity in described first spatial cache 21, the matched data or the merging data that just start the code block data of the predetermined quantity read in described first spatial cache 21 carry out solution first time rate coupling 15 and channel-decoding 16.Wherein, the technology that the detailed process of described solution first time rate coupling and channel-decoding is known to the skilled person, does not repeat them here.
Further, as as described in step S5, after the matched data of the code block data to the current predetermined quantity be stored in described first spatial cache 21 or merging data carry out solution first time rate coupling 15, the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache 21 or merging data are backed up to described second spatial cache 22, then the matched data of the code block data of follow-up predetermined quantity or merging data is stored in described first spatial cache 21.
Specifically, at the matched data of the code block data to the current predetermined quantity be stored in described first spatial cache 21 or merging data after separating first time rate coupling 15, channel-decoding 16 is proceeded.Further, owing to carrying out to the matched data of the code block data of the predetermined quantity be stored in described first spatial cache 21 or merging data the process understanding first time rate coupling 15, just the matched data of the code block data of these current predetermined quantities be stored in described first spatial cache 21 or merging data can be backed up to described second spatial cache 22, so just vacate described first spatial cache 21.Now can continue to perform step S2 and step S3 to the code block data of follow-up predetermined quantity, that is: if described transport block data is new data, then the code block data of follow-up predetermined quantity is carried out separating secondary rate and mate the matched data obtained and be stored in the first spatial cache 21; If described transport block data is data retransmission, then the code block data of follow-up predetermined quantity is carried out separating secondary rate to mate the matched data obtained and carry out being stored in described first spatial cache 21 again after merging obtains merging data with Backup Data corresponding with described matched data in described second spatial cache 22, thus described first spatial cache 21 is recycled.
Further, in the present embodiment, above-mentioned complete solution first time rate coupling is carried out to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data after, can be that the process that the matched data of the described code block data to the current predetermined quantity be stored in described first spatial cache 21 or merging data carry out channel-decoding 16 can back up to described second spatial cache executed in parallel with the matched data of the code block data by the current predetermined quantity be stored in described first spatial cache 21 or merging data.That is, the current backup procedure being stored in matched data in the first spatial cache 21 or merging data is stored in the channel decoding procedures executed in parallel of matched data in the first spatial cache 21 or merging data with same these, can reduce the overall decoding delay of communication terminal like this.
Be 1 for example with predetermined quantity, when the matched data (the TB data belonging to the 1st CB data are new data) to the CB data of the 1st in the first spatial cache 21 or merging data (the TB data belonging to the 1st CB data are data retransmission) are separated after first time rate mated, also perform while the channel-decoding carrying out the 1st CB data and the matched data of the CB data of the 1st in the first spatial cache 21 or merging data are backed up to the step of the second spatial cache 22 as the Backup Data of the 1st CB data, then the matched data of the 2nd CB data or merging data are stored in described first spatial cache 21, continuation carries out solution first time rate coupling and channel-decoding to the matched data of the 2nd CB data or merging data, after solution first time rate has been mated, also perform while carrying out channel-decoding and the matched data of the CB data of the 2nd in the first spatial cache 21 or merging data are backed up to the step of the second spatial cache 22 as the Backup Data of the 2nd CB data, then the matched data of the 3rd CB data or merging data are stored in described first spatial cache 21, continuation carries out solution first time rate coupling and channel-decoding to the matched data of the 3rd CB data or merging data ..., by that analogy.
In other embodiments, also can be the matched data of the described code block data to the current predetermined quantity be stored in described first spatial cache 21 or the merging data process of carrying out channel-decoding 16 and the matched data of the code block data of follow-up predetermined quantity or merging data are stored in described first spatial cache 21 executed in parallel.That is, the process not performing channel-decoding 16 in the process of described second spatial cache 22 is backed up in the matched data of the code block data by the current predetermined quantity be stored in described first spatial cache 21 or merging data, but until after backup procedure terminates, the process matched data of the code block data of follow-up predetermined quantity or merging data being stored in described first spatial cache 21 is mated the concurrent process that the matched data of the code block data of the predetermined quantity after 15 or merging data carry out channel-decoding 16 with to current perform through being separated first time rate, also the overall decoding delay of communication terminal can be reduced so to a certain extent.
Be still 1 for example with predetermined quantity, after the matched data of the CB data of the 1st in the first spatial cache 21 or merging data solution first time rate have been mated, first the matched data of the CB data of the 1st in the first spatial cache 21 or merging data are backed up to the Backup Data of the second spatial cache 22 as the 1st CB data, while then carrying out the channel-decoding of the 1st CB data, also perform the step matched data of the 2nd CB data or merging data being stored in described first spatial cache 21; Continuation carries out solution first time rate coupling and channel-decoding to the matched data of the 2nd CB data or merging data, after solution first time rate has been mated, first the matched data of the CB data of the 2nd in the first spatial cache 21 or merging data are backed up to the Backup Data of the second spatial cache 22 as the 2nd CB data, while then carrying out the channel-decoding of the 2nd CB data, also perform the step matched data of the 3rd CB data or merging data being stored in described first spatial cache 21; Continuation carries out solution first time rate coupling and channel-decoding to the matched data of the 3rd CB data or merging data ..., by that analogy.
Further, due at receiving terminal, usually time of channel-decoding carried out to the code block data of predetermined quantity long, therefore carry out before channel-decoding completes in the matched data of the code block data to current predetermined quantity or merging data, can complete and the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache 21 or merging data are backed up to described second spatial cache 22, and the code block data of follow-up predetermined quantity carried out solution secondary rate coupling and obtain matched data and be stored in the first spatial cache 21, or by the matched data of the code block data of predetermined quantity be stored in Backup Data corresponding with described matched data in described second spatial cache 22 and merge and obtain merging data and the process being stored in described first spatial cache 21.That is, the process that the matched data of the described code block data to the current predetermined quantity be stored in described first spatial cache 21 or merging data carry out channel-decoding 16 performs with by the current backup procedure being stored in matched data in the first spatial cache 21 or merging data and the concurrent process matched data of the code block data of follow-up predetermined quantity or merging data being stored in described first spatial cache 21, above to greatest extent can reduce the overall time delay of decoding of communication terminal like this.
Be no matter the situation of any one executed in parallel above-mentioned, the technical program can also reduce the time delay of communication terminal entirety decoding while saving described first spatial cache 21.
In TD-SCDMA communication system, owing to only having transport block data with check code (cyclic redundancy check (CRC) code), and code block data does not comprise check code, therefore until when the number of described code block data or merging data is enough to form transport block data, carry out verification 17 to transport block data.If verification succeeds, then determine that described transport block data (described subframe) receives successfully, successfully indicate to transmitting terminal transmission and reception; If verify unsuccessfully, then send to transmitting terminal the instruction that takes defeat.Above-mentioned solution first time rate coupling, channel-decoding and verification are all technology as well known to those skilled in the art, and therefore not to repeat here.
In other embodiments, such as, in TD-LTE communication system, with TD-SCDMA communication system unlike, because each code block data is with check code, therefore each described code block data can independently verify after channel-decoding.If verification succeeds, then determine that described code block data receives successfully, until code block data all in described transport block data all verification succeeds, can determine that described transport block data receives successfully, successfully indicate to transmitting terminal transmission and reception in the regulation moment; As long as one of them code block data verifies unsuccessfully, namely determine that the transport block data at this code block data place takes defeat, after processing all data, receiving terminal sends to transmitting terminal the instruction that takes defeat in the regulation moment.
Inventor is by comparing prior art and the technical program discovery, be in the TD-SCDMA system of 4.2Mbps in HSDPA message transmission rate, 5 code block data are comprised in each subframe (transport block data), described transport block data is soft Bit data, a soft bit stealing byte (Byte, i.e. 8bit).Adopt the coding/decoding method of prior art, namely disposable first complete an all code block data of subframe (5ms) solution secondary rate coupling and incremental redundancy merging (IRcombine) after, in units of code block data one by one, carry out the method for separating first time rate coupling, channel-decoding to current transport block data again, in the SOC sheet of receiving terminal, the first spatial cache needs the soft Bit data amount of all transport block data after separating secondary rate coupling in preservation subframe to be 63360byte.But the coding/decoding method that the technical program provides, suppose that described predetermined quantity is 1, namely in units of code block data, carry out solution secondary rate coupling and incremental redundancy merges, and previous code block data carries out the channel-decoding after separating first time rate coupling mates with the solution secondary rate of present encoding blocks of data and incremental redundancy merging process executed in parallel.Can draw, after separating secondary rate coupling, it may maximum soft Bit data amount be (5114 × 3+12)=15354Byte to a code block data.Further in order to simple implementation, at receiving terminal, reduce the degree of coupling of separating between secondary rate matching unit and follow-up solution first time rate matching unit, some redundant spaces can be increased to the first spatial cache in the SOC sheet of receiving terminal.Here with in the communication system of actual design, the redundancy increasing by 10% for the first spatial cache in the SOC sheet of receiving terminal is example, the size total amount of the first spatial cache is 16896Byte, wherein, three part system bit storage space of described first spatial cache, the first check bit memory space and the second check bit memory space, the memory space of three parts respectively configures 5632Byte.Obtain through comparing, compared to existing technologies, in the SOC sheet of receiving terminal, described first spatial cache reduces buffer memory 46.468kByte to the technical program.Further, according to the description of the invention described above embodiment, the technical program also reduces the time delay of receiving terminal entirety decoding simultaneously.
The embodiment of the present invention additionally provides a kind of decoding device of communication system, for decoding to the business datum of descending transmission channel.As shown in Figure 4 be the structural representation of the specific embodiment of the decoding device of a kind of communication system of the present invention.With reference to figure 4, described decoding device 3 comprises:
Receiving element 31, for receiving the transport block data after descrambling, wherein said transport block data comprises code block data.Separate secondary rate matching unit 32, the code block data for the predetermined quantity received described receiving element 31 carries out solution secondary rate coupling and obtains matched data.Separate secondary rate matching unit 32 in units of the code block data of predetermined quantity, the code block data in the transport block data receive described receiving element 31 carries out solution secondary rate coupling and obtains matched data.
Data processing unit 33, described transport block data for being currently received at described receiving element 31 is new data, then the matched data of the code block data after described solution secondary rate matching unit 32 processes of predetermined quantity is stored in the first spatial cache 34; The described transport block data be currently received at described receiving element 31 is data retransmission, by the matched data of the code block data of the predetermined quantity after processing through described solution secondary rate matching unit 32 be stored in Backup Data corresponding with described matched data in the second spatial cache 35 and merge and obtain merging data and be stored in described first spatial cache 34.
Decoding unit 36, carries out solution first time rate coupling and channel-decoding for the matched data of the code block data to the current predetermined quantity be stored in described first spatial cache 34 or merging data.
Backup units 37, for after described decoding unit 36 carries out solution first time rate coupling to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache 34 or merging data, the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache 34 or merging data are backed up to described second spatial cache 35, then by described data processing unit 33, the matched data of the code block data of follow-up predetermined quantity or merging data is stored in described first spatial cache 34.
It should be noted that, described first spatial cache 34 in described decoding device 3 is equivalent to the first spatial cache 21 described in Fig. 3, and described second spatial cache 35 in described decoding device 3 is equivalent to described second spatial cache 22 in Fig. 3.
In the present embodiment, described receiving element 31 is before receiving the transport block data after descrambling, described transport block data is also through joint-detection demodulation, deinterleaving process and descrambling, wherein said joint-detection demodulation, deinterleaving process and descrambling procedure are all known to the skilled person technology, do not repeat them here.It should be noted that, described decoding device 3 is for the cycle receives described business datum with each subframe, each subframe comprises a transmission block (TB, Transportblock) data, according to relevant communication protocol, described transport block data is divided into several encoding block (CB, CodeBlock) data.Therefore, in the present embodiment, in units of transport block data, carry out joint-detection demodulation, deinterleaving process and descrambling after receiving terminal receives business datum, and comprise multiple code block data in this transport block data.
Then, carry out solution secondary rate coupling by the code block data of described solution secondary rate matching unit 32 pairs of predetermined quantities and obtain matched data.Unlike the prior art, in the present embodiment, the transport block data that described receiving element 31 is received be carry out in units of the code block data of predetermined quantity solution secondary rate coupling, the code block data of predetermined quantity can be stored in the first spatial cache 34 in subsequent treatment like this, thus save the memory capacity of described first spatial cache 34.
Then, according to the indication information of the down control channel corresponding with described descending transmission channel, described data processing unit 33 can determine that being currently received transport block data is new data or data retransmission.In the present embodiment, described descending transmission channel is HS-DSCH channel, and the down control channel corresponding with described HS-DSCH channel is HS-SCCH channel.
If determine that the described transport block data be currently received is new data according to the indication information of described HS-SCCH channel, then the matched data of the code block data of predetermined quantity is stored in the first spatial cache 34.Wherein, described first spatial cache 34 is the memory space in the system level chip (SOC) of receiving terminal, and described first spatial cache 34 is for storing matched data or the merging data of the code block data of predetermined quantity.
If determine that the described transport block data be currently received is data retransmission according to the indication information of described HS-SCCH channel, by the matched data of the code block data of the predetermined quantity after processing through described solution secondary rate matching unit 32 be stored in Backup Data corresponding with described matched data in described second spatial cache 35 and merge and obtain merging data and be stored in described first spatial cache 34.In the present embodiment, described predetermined quantity is 1-3, and preferably, described predetermined quantity is 1, namely one by one the matched data of described code block data is stored in described first spatial cache 34, the memory capacity of described first spatial cache 34 can be saved so to greatest extent.
In the present embodiment, described second spatial cache 35 is system level chip (SOC) memory space outward of receiving terminal, has backed up matched data or the merging data of all code block data in the transport block data of all HARQ procedure in described second spatial cache 35.
Particularly, according to described indication information, wherein, described indication information comprises HARQ procedure numbering (HARQprocessinformation) and new data instruction (Newdataindicator), receiving terminal according to HARQ procedure numbering determine HS-DSCH channel transmission data belongs to which HARQ procedure, according to new data instruction determine send be new data or data retransmission.It should be noted that, due in TD-SCDMA communication system, only has transport block data with check code (cyclic redundancy check (CRC) code), and code block data does not comprise check code, therefore to the code block data of predetermined quantity after in described decoding unit 36, channel decoding unit (not shown) carries out channel-decoding, need until just undertaken verifying (cyclic redundancy check (CRC)) by verification unit (not shown) when the number of described code block data is enough to a formation transport block data.
If data retransmission, from described second spatial cache 35, read the Backup Data corresponding with the matched data of described predetermined quantity, and carry out being stored in described first spatial cache 34 again after merging obtains merging data with the matched data of the code block data of the predetermined quantity of described data retransmission.In the present embodiment, the mode of described merging is that incremental redundancy merges (IRcombine), it is data retransmission and Backup Data are carried out being added merging obtain merging data that described incremental redundancy merges, the detailed process that described incremental redundancy merges is known to the skilled person technology, does not repeat them here.
In other embodiments, such as, in TD-LTE communication system, not only transport block data is with check code, and each code block data in described transport block data also respectively carries check code.Therefore, to the code block data of predetermined quantity after the channel decoding unit (not shown) in described decoding unit 36 carries out channel-decoding, can be verified code block data one by one by verification unit (not shown), as long as there is check errors in one of them code block data, then determine described transport block data decoding error, after whole TB has decoded, send whether correctly receive instruction in particular moment to transmitting terminal.The transport block data of check errors resends to receiving terminal by transmitting terminal.If after described receiving element 31 is currently received data retransmission, be equally that unit carry out solutions secondary rate mate obtain matched data to described data retransmission according to the code block data of predetermined quantity by described solution secondary rate matching unit 32, and the matched data of predetermined quantity be stored in described first spatial cache 34.Further, from described second spatial cache 35, read the Backup Data corresponding with described matched data, and the matched data of the code block data of the predetermined quantity of described Backup Data and described data retransmission is carried out being stored in described first spatial cache 34 again after merging obtains merging data.Similarly, in other embodiments described, the mode of described merging is that incremental redundancy merges (IRcombine), it is data retransmission and Backup Data are carried out being added merging obtain merging data that described incremental redundancy merges, the detailed process that described incremental redundancy merges is known to the skilled person technology, does not repeat them here.
Then, by described decoding unit 36, solution first time rate coupling and channel-decoding are carried out to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache 34 or merging data.
In the present embodiment, as long as when storing matched data or the merging data of predetermined quantity in described first spatial cache 34, the solution first time rate matching unit (not shown) in described decoding unit 36 just starts the matched data of the predetermined quantity read in described first spatial cache 34 or merging data and carries out solutions first time rate and mate; Then, the channel decoding unit (not shown) in described decoding unit 36 carries out channel-decoding to the matched data (code block data) after separating first time rate and mating or merging data.
Further, after solution first time rate matching unit in described decoding unit 36 carries out solution first time rate coupling to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache 34 or merging data, by described backup units 37, the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache 34 or merging data are backed up to described second spatial cache 35, and then by described data processing unit 33, the matched data of the code block data of follow-up predetermined quantity or merging data are stored in described first spatial cache 34.
Specifically, described decoding unit 36 to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache 34 or merging data carry out channel-decoding and described backup units 37 matched data of the code block data of the current predetermined quantity be stored in described first spatial cache 34 or merging data backed up to described second spatial cache 35 can executed in parallel, the decoding delay of communication terminal can be reduced like this.
Or, described decoding unit 36 to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache 34 or merging data carry out channel-decoding and described data processing unit 33 matched data of the code block data of follow-up predetermined quantity or merging data be stored in described first spatial cache 34 can executed in parallel, so also can reduce the decoding delay of communication terminal.
Further, due at receiving terminal, usually time of channel-decoding carried out to the code block data of predetermined quantity long, therefore described decoding unit 36 carries out to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache 34 or merging data the concurrent process that the matched data of the code block data of follow-up predetermined quantity or merging data to be stored in described first spatial cache 34 by backup procedure that the process of channel-decoding and described backup units 37 be stored in matched data in the first spatial cache 34 or merging data by current and described data processing unit 33 and performs, above to greatest extent can reduce the overall time delay of decoding of communication terminal like this.
Therefore, be no matter the situation of any one executed in parallel above-mentioned, the technical program can also reduce the time delay of communication terminal entirety decoding while saving described first spatial cache 34.
In TD-SCDMA communication system, owing to only having transport block data with check code (cyclic redundancy check (CRC) code), and code block data does not comprise check code, therefore until when the number of described code block data or merging data is enough to form transport block data, verified transport block data by verification unit.If verification succeeds, then determine that described transport block data (described subframe) receives successfully, send reception to transmitting terminal and successfully indicate; If verify unsuccessfully, then send to transmitting terminal the instruction that takes defeat.Above-mentioned solution first time rate coupling, channel-decoding and verification are all technology as well known to those skilled in the art, and therefore not to repeat here.
In other embodiments, such as, in TD-LTE communication system, with TD-SCDMA communication system unlike, because each code block data is with check code, therefore each described code block data can independently verify after channel-decoding.If verification succeeds, then determine that described code block data receives successfully, until code block data all in described transport block data all verification succeeds, can determine that described transport block data receives successfully, successfully indicate to transmitting terminal transmission and reception; As long as one of them code block data verifies unsuccessfully, namely determine that the transport block data at this code block data place takes defeat, receiving terminal then sends to transmitting terminal the instruction that takes defeat.
The embodiment of the present invention additionally provides a kind of communication terminal, described communication terminal is as receiving terminal, receive the business datum sent from transmitting terminal (being generally base station), the decoding device 3 of communication system as shown in Figure 4 is at least comprised, for decoding to the business datum of descending transmission channel in described communication terminal.In the present embodiment, described communication system is TD-SCDMA communication system, and described descending transmission channel is high-speed downlink shared channel, and described business datum is high speed descending grouping access data.
To sum up, the technical program not only saves first spatial cache (spatial cache namely in SOC sheet) of communication terminal, also reduces the time delay of communication terminal entirety decoding simultaneously.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; the Method and Technology content of above-mentioned announcement can be utilized to make possible variation and amendment to technical solution of the present invention; therefore; every content not departing from technical solution of the present invention; the any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all belong to the protection range of technical solution of the present invention.
Claims (19)
1. the coding/decoding method in communication system, for decoding to the business datum of descending transmission channel, is characterized in that, comprising:
Receive the transport block data after descrambling, wherein said transport block data comprises code block data;
In units of the code block data of predetermined quantity, carry out solution secondary rate coupling obtain matched data;
If the described transport block data be currently received is new data, then the matched data of the code block data of predetermined quantity is stored in the first spatial cache; If the described transport block data be currently received is data retransmission, by the matched data of the code block data of predetermined quantity be stored in Backup Data corresponding with described matched data in the second spatial cache and merge and obtain merging data and be stored in described first spatial cache, described first spatial cache is the incremental redundancy buffer memory in receiving terminal SOC sheet, and described first spatial cache is for storing matched data or the merging data of the code block data of predetermined quantity; Described second spatial cache is for backing up matched data or the merging data of all code block data in described transport block data;
Solution first time rate coupling and channel-decoding are carried out to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data;
After the matched data of the code block data to the current predetermined quantity be stored in described first spatial cache or merging data carry out solution first time rate coupling, the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data are backed up to described second spatial cache, then the matched data of the code block data of follow-up predetermined quantity or merging data is stored in described first spatial cache;
Wherein, the matched data of the described code block data to the current predetermined quantity be stored in described first spatial cache or merging data carry out channel-decoding and the matched data of the code block data of follow-up predetermined quantity or merging data are stored in described first spatial cache executed in parallel.
2. the coding/decoding method in communication system according to claim 1, it is characterized in that, the matched data of the described code block data to the current predetermined quantity be stored in described first spatial cache or merging data carry out channel-decoding and the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data are backed up to described second spatial cache executed in parallel.
3. the coding/decoding method in communication system according to claim 1, is characterized in that, determines that the described transport block data be currently received is new data or data retransmission according to the indication information of the down control channel corresponding with described descending transmission channel.
4. the coding/decoding method in communication system according to claim 1, it is characterized in that, Backup Data corresponding with described matched data in described second spatial cache is matched data or the merging data of the code block data of the predetermined quantity backed up in described second spatial cache, and described code block data is at check errors after channel-decoding.
5. the coding/decoding method in communication system according to claim 1, it is characterized in that, the matched data of the code block data of described predetermined quantity is that incremental redundancy merges with being stored in the mode that Backup Data corresponding with described matched data in the second spatial cache merges.
6. the coding/decoding method in communication system according to claim 1, is characterized in that, described predetermined quantity is 1-3.
7. the coding/decoding method in communication system according to claim 1, is characterized in that, described transport block data is soft Bit data.
8. the coding/decoding method in communication system according to claim 1, is characterized in that, described communication system is TD-SCDMA communication system.
9. the coding/decoding method in communication system according to claim 8, is characterized in that, described descending transmission channel is high-speed downlink shared channel, and described business datum is high speed descending grouping access data.
10. a decoding device for communication system, for decoding to the business datum of descending transmission channel, is characterized in that, comprising:
Receiving element, for receiving the transport block data after descrambling, wherein said transport block data comprises code block data;
Separate secondary rate matching unit, the code block data for the predetermined quantity received described receiving element carries out solution secondary rate coupling and obtains matched data;
Data processing unit, when the described transport block data for being currently received at described receiving element is new data, is then stored in the first spatial cache by the matched data of the code block data after the process of described solution secondary rate matching unit of predetermined quantity; When the described transport block data that described receiving element is currently received is data retransmission, by the matched data of the code block data of the predetermined quantity after the process of described solution secondary rate matching unit be stored in Backup Data corresponding with described matched data in the second spatial cache and merge and obtain merging data and be stored in described first spatial cache, described first spatial cache is the incremental redundancy buffer memory in receiving terminal SOC sheet, and described first spatial cache is for storing matched data or the merging data of the code block data of predetermined quantity; Described second spatial cache is for backing up matched data or the merging data of all code block data in described transport block data;
Decoding unit, carries out solution first time rate coupling and channel-decoding for the matched data of the code block data to the current predetermined quantity be stored in described first spatial cache or merging data;
Backup units, for after described decoding unit carries out solution first time rate coupling to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data, the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data are backed up to described second spatial cache, then by described data processing unit, the matched data of the code block data of follow-up predetermined quantity or merging data is stored in described first spatial cache;
Wherein, described decoding unit carries out channel-decoding to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data and the matched data of the code block data of follow-up predetermined quantity or merging data are stored in described first spatial cache executed in parallel by described data processing unit.
The decoding device of 11. communication systems according to claim 10, it is characterized in that, described decoding unit carries out channel-decoding to the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data and the matched data of the code block data of the current predetermined quantity be stored in described first spatial cache or merging data are backed up to described second spatial cache executed in parallel by described backup units.
The decoding device of 12. communication systems according to claim 10, it is characterized in that, according to the indication information of the down control channel corresponding with described descending transmission channel, described data processing unit determines that the described transport block data be currently received is new data or data retransmission.
The decoding device of 13. communication systems according to claim 10, it is characterized in that, Backup Data corresponding with described matched data in described second spatial cache is matched data or the merging data of the code block data of the predetermined quantity backed up in described second spatial cache, and described code block data is at check errors after channel-decoding.
The decoding device of 14. communication systems according to claim 10, it is characterized in that, the matched data of the code block data of described predetermined quantity is that incremental redundancy merges with being stored in the mode that Backup Data corresponding with described matched data in the second spatial cache merges.
The decoding device of 15. communication systems according to claim 10, is characterized in that, described predetermined quantity is 1-3.
The decoding device of 16. communication systems according to claim 10, is characterized in that, described transport block data is soft Bit data.
The decoding device of 17. communication systems according to claim 10, is characterized in that, described communication system is TD-SCDMA communication system.
The decoding device of 18. communication systems according to claim 17, is characterized in that, described descending transmission channel is high-speed downlink shared channel, and described business datum is high speed descending grouping access data.
19. 1 kinds of communication terminals, is characterized in that, comprise the decoding device of the communication system according to any one of claim 10 to 18.
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