CN103248454A - Decoding method, decoding device and communication terminal in communication system - Google Patents
Decoding method, decoding device and communication terminal in communication system Download PDFInfo
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Abstract
The invention discloses a decoding method, a decoding device and a communication terminal in a communication system. The decoding method comprises the following steps: descrambled transmission block data are received, second rate matching to a predetermined amount of descrambled data is carried out to obtain matched data, and the matched data are stored in a first buffer memory space; if the matched data are retransmission data, a predetermined amount of back up data corresponding to the retransmission data is read from a second buffer memory space to be merged with the matched data of the retransmission data to obtain combined data, and the combined data are stored in the first buffer memory space; the matched data or the combined data currently stored in the first buffer memory space are read, and first rata matching and channel decoding are carried out; and after the first rata matching, a predetermined amount of the matched data or the combined data currently stored in the first buffer memory space are backuped in the second buffer memory space, and the follow-up predetermined amount of the matched data or the combined data are stored in the first buffer memory space. According to the technical scheme of the invention, not only is the on-chip buffer memory space of the communication terminal saved, but also the overall decoding time delay of the communication terminal can be reduced.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly the coding/decoding method in the communication system and decoding device, communication terminal.
Background technology
Along with the development of mobile communication technology, people also improve for the requirement of the quality of mobile communication and the type of service that provides thereof thereupon.(Long Term Evolution, proposition LTE) and development have met people's this demand to the Long Term Evolution of 3G (Third Generation) Moblie (3G) and 3G.
According to third generation partner program (The 3rd Generation Partnership Project, 3GPP) agreement regulation, in 3-G (Generation Three mobile communication system), introduce an important enhancing technology, be that high speed downlink packet inserts (High Speed Downlink Packet Access, HSDPA), the high speed business of HSDPA mainly is carried on high speed descending sharing channel (High Speed Downlink Share Channel, HS-DSCH), this is the dedicated transmission channel of the high speed business of HSDPA.High-speed downstream control channel (High Speed Shared Control Channel, HS-SCCH) be the Dedicated Control Channel of HSDPA, it is a physical channel, be used for all relevant bottom control information of carrying, that is to say, terminal will receive the data from the HS-DSCH channel according to the control information of HS-SCCH channel, and according to this control information data be carried out a series of processing, comprise demodulation, deinterleaving, descrambling, solution rate-matched, decoding and verification etc.
At TD SDMA (Time Division-Synchronous Code Division Multiple Access, TD-SCDMA) in the communication system, because the influence of factors such as wireless transmission environment, signal interference, terminal often is not once just can finish receiving the deal with data process, when decoding error occurring, also need transmitting terminal (being generally the base station) to resend data, terminal receives processing, i.e. data re-transmission again.And in order to reduce meaningless data re-transmission, usually be provided with maximum retransmission in the TD-SCDMA system, namely when data re-transmission reaches maximum retransmission, just no longer proceed, thereby finish whole data transmission, reception and processing procedure.In the TD-SCDMA communication system, (Hybrid Automatic Repeat Request, HARQ) technology improves capacity and the efficient of system to adopt the automatic repeat requests of mixing usually.When base station or terminal decoding error, can notify the opposite end with data re-transmitting, base station or terminal merge to improve signal to noise ratio with the data retransmission that receives and the data that receive before, merge gain raising receptivity thereby obtain.
In the prior art, be example with the TD-SCDMA communication system, receiving terminal (for example being portable terminal) is in the HSDPA data of the HS-DSCH channel of a subframe (5 milliseconds) that receives transmitting terminal (for example being the base station) transmission, at first carry out after the joint-detection demodulation, the soft Bit data of this subframe is done deinterleaving handle (De-interleave), carry out descrambling (De-scramble) afterwards, make to separate secondary rate coupling (De-2nd rate match) then, result cache is gone into system level chip (the System on Chip of receiving terminal, SOC) Nei incremental redundancy buffer memory (Incremental redundancy Buffer, IR Buffer), the IR Buffer in this SOC sheet is data cached for the IR that deposits current HARQ process.
If this secondary data is data retransmission, then read in the Backup Data of last incremental redundancy merging (IR Combine) and this secondary data (being data retransmission) of the storage of the IR Buffer in the SOC sheet the IR Buffer outside the SOC sheet (IR that deposits all HARQ processes is data cached) and do the IR merging, again merging data is backed up to the outer IR Buffer of SOC sheet, the merging data that IR Buffer in the SOC sheet is preserved is separated first time rate coupling (De-lst rate match) afterwards, carries out channel-decoding (Channel Decode) and CRC check (CRC Check) after finishing again.If this secondary data is new data (i.e. the data that send first), then these data not being made IR merges, but the new data of directly the IR Buffer in the SOC sheet being preserved backs up to the outer IR Buffer of SOC sheet after making to separate the secondary rate coupling, the solution secondary rate matched data that IR Buffer in the current SOC sheet is preserved is separated first time rate coupling (De-lst rate match) afterwards, carries out channel-decoding (Channel Decode) and CRC check (CRC Check) after finishing again.
The common data that IR Buffer in the SOC sheet is preserved are separated the secondary rate coupling and IR merges and solution first time rate is afterwards mated and channel-decoding is the serial execution, namely the data of a subframe disposable finish separate secondary rate coupling and IR merging after, and then (Code Block CB) makes to separate first time rate coupling and channel-decoding according to the encoding block data in this subframe one by one.Adopt this method, just need make the IR Buffer in the SOC sheet be enough to store solution secondary rate matched data or the IR merging data of whole subframe (5 milliseconds), taken the spatial cache in the more SOC sheet, also increased the integral body decoding time delay of receiving terminal.
More can be that the denomination of invention of US2007168821A1 is the U.S. Patent application file of " Arq Control In An Hsdpa Communications System (the automatic re-send request may control in the high-speed downlink packet access communication system) " with reference to publication number about the coding/decoding method in the communication system, but does not still address the above problem.
Summary of the invention
The problem that the present invention solves is to reduce the spatial cache in the SOC sheet in the communication terminal, and reduces the decoding time delay of communication terminal integral body.
For addressing the above problem, the embodiment of the invention provides the coding/decoding method in a kind of communication system, is used for the business datum of descending transmission channel is decoded, and comprising: the transport block data behind the reception descrambling, and wherein said transport block data comprises the encoding block data; Be that unit separates the secondary rate coupling and obtains matched data with the encoding block data of predetermined quantity; If the current described transport block data that receives is new data, then the matched data with the encoding block data of predetermined quantity is stored in first spatial cache; If the current described transport block data that receives is data retransmission, with the matched data of the encoding block data of predetermined quantity be stored in second spatial cache in obtain merging data and be stored in described first spatial cache with the corresponding Backup Data merging of described matched data; Current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache separated first time rate coupling and channel-decoding; After the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache or merging data are separated the first time rate coupling, current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache backed up to described second spatial cache, and matched data or the merging data with the encoding block data of follow-up predetermined quantity is stored in described first spatial cache then.
Alternatively, described matched data or merging data to the current encoding block data that are stored in the predetermined quantity in described first spatial cache carries out channel-decoding and current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache backed up to the described second spatial cache executed in parallel.
Alternatively, described matched data or merging data to the current encoding block data that are stored in the predetermined quantity in described first spatial cache carries out channel-decoding and is stored in the described first spatial cache executed in parallel with matched data or merging data with the encoding block data of follow-up predetermined quantity.
Alternatively, determine that according to the indication information of the down control channel corresponding with described descending transmission channel the current described transport block data that receives is new data or data retransmission.
Alternatively, the Backup Data corresponding with described matched data is matched data or the merging data that has backed up to the encoding block data of the predetermined quantity in described second spatial cache in described second spatial cache, and described encoding block data check errors behind the process channel-decoding.
Alternatively, the matched data of the encoding block data of described predetermined quantity be stored in second spatial cache in the mode that merges with the corresponding Backup Data of described matched data be that incremental redundancy merges.
Alternatively, described predetermined quantity is 1-3.
Alternatively, described first spatial cache is used for matched data or the merging data of the encoding block data of storing predetermined quantity; Described second spatial cache is used for matched data or the merging data of all encoding block data of the described transport block data of backup.
Alternatively, described transport block data is soft Bit data.
Alternatively, described communication system is the 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 invention also provides a kind of decoding device of communication system, is used for the business datum of descending transmission channel is decoded, and comprising: receiving element, and for the transport block data behind the reception descrambling, wherein said transport block data comprises the encoding block data; Separate the secondary rate matching unit, separate the secondary rate coupling for the encoding block data of the predetermined quantity that described receiving element is received and obtain matched data; Data processing unit, being used in the current described transport block data that receives of described receiving element is new data, then the matched data with the encoding block data after described solution secondary rate matching unit is handled of predetermined quantity is stored in first spatial cache; Be data retransmission in the current described transport block data that receives of described receiving element, the matched data of the encoding block data of the predetermined quantity after described solution secondary rate matching unit is handled be stored in Backup Data corresponding with described matched data in second spatial cache and merging obtains merging data and is stored in described first spatial cache; Decoding unit is used for current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache separated first time rate coupling and channel-decoding; Backup units, be used for after described decoding unit is separated the first time rate coupling to the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache or merging data, current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache backed up to described second spatial cache, by described data processing unit matched data or the merging data of the encoding block data of follow-up predetermined quantity is stored in described first spatial cache then.
The embodiment of the invention also 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:
The encoding block data of the predetermined quantity behind the descrambling are separated secondary rate coupling obtain matched data, if the current transport block data that receives is new data, then the matched data with the encoding block data of predetermined quantity is stored in first spatial cache; If the current transport block data that receives is data retransmission, with the matched data of the encoding block data of predetermined quantity be stored in second spatial cache in obtain merging data and be stored in described first spatial cache with the corresponding Backup Data merging of described matched data.In described first spatial cache, only need the encoding block data of storing predetermined quantity to get final product like this, and do not need to store whole transport block data, thereby saved described first spatial cache.
Further, in first spatial cache after the current encoding block data that store predetermined quantity, just can separate first time rate coupling and channel-decoding to current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache, after the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache or merging data are separated the first time rate coupling, current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache backed up to described second spatial cache, so just vacate described first spatial cache, supply matched data or the merging data of the encoding block data of follow-up predetermined quantity to be stored in described first spatial cache, recycling like this first spatial cache makes and also reduced the whole time delay of decoding of communication terminal when saving described first spatial cache.
Description of drawings
Fig. 1 is the schematic flow sheet of 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 the TD-SCDMA communication system of the present invention;
Fig. 4 is the structural representation of specific embodiment of the decoding device of a kind of communication system of the present invention.
Embodiment
At prior art problems, the inventor is through research, a kind of coding/decoding method of communication system is provided, be used for the business datum of descending transmission channel is decoded, the technical program has realized having saved described first spatial cache (spatial cache in the SOC sheet) in the process that communication terminal is decoded, and recycling first spatial cache makes the time delay that has also reduced the whole decoding of communication terminal when saving described first spatial cache.
For above-mentioned purpose of the present invention, feature and advantage can more be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
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 and implements with multiple, and those skilled in the art can do similar popularization under the situation of intension of the present invention.Therefore the present invention is not subjected to the restriction of following public embodiment.
The schematic flow sheet of the embodiment of the coding/decoding method of a kind of communication system of the present invention as shown in Figure 1.With reference to figure 1, described coding/decoding method is used for the business datum of descending transmission channel is decoded, and comprising:
Step S1: the transport block data behind the reception descrambling, wherein said transport block data comprises the encoding block data;
Step S2: be that unit separates the secondary rate coupling and obtains matched data with the encoding block data of predetermined quantity;
Step S3: if the current described transport block data that receives is new data, then the matched data with the encoding block data of predetermined quantity is stored in first spatial cache; If the current described transport block data that receives is data retransmission, with the matched data of the encoding block data of predetermined quantity be stored in second spatial cache in obtain merging data and be stored in described first spatial cache with the corresponding Backup Data merging of described matched data;
Step S4: current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache separated first time rate coupling and channel-decoding;
Step S5: after the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache or merging data are separated the first time rate coupling, current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache backed up to described second spatial cache, and matched data or the merging data with the encoding block data of follow-up predetermined quantity is stored in described first spatial cache then.
In the specific embodiment hereinafter, be the TD-SCDMA communication system with described 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 downlink packet access (HSDPA) data instance is described, but is not limited to this in actual applications.
Embodiments of the invention for convenience of explanation, at first the frame structure at 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
fBe 10ms (millisecond), comprise 2 wireless sub-frames, each wireless sub-frame T
sBe 5ms.Each subframe comprise 7 main time slots (be time slot 0, time slot 1, time slot 2 ..., time slot 6) and 3 special time slots (be respectively descending pilot frequency time slot, protection at interval and uplink pilot time slot; indicate with DwPTS, Gp, UpPTS respectively among 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 the base station) is periodic scheduling HS-DSCH channel with a subframe (5ms), is used for transmission HSDPA data; Handle according to the indication information of the HS-SCCH channel corresponding with described HS-DSCH channel at receiving terminal (communication terminal), comprise demodulation, deinterleaving processing, descrambling, solution secondary rate coupling, separate first time rate coupling, channel-decoding and verification etc.
The coding/decoding method of the described communication system of Fig. 1 is described below in conjunction with the schematic block diagram of the decoding process of HS-DSCH channel in the TD-SCDMA communication system shown in Figure 3.
As described in step S1, the transport block data behind the reception descrambling, wherein said transport block data comprises the encoding block data.
Particularly, receiving terminal (communication terminal) will carry out joint-detection demodulation 11 to this business datum earlier after the business datum that receives transmitting terminal (base station) transmission.Those skilled in the art know, because a plurality of users' that transmitting terminal sends in the TD-SCDMA communication system signal is aliasing in time domain and frequency domain, signal aloft transmission course also can be subjected to the interference (for example noise) of external environment; Therefore receiving terminal needs to carry out joint-detection after receiving this signal, namely utilize signal separating method that each user's signal is separated, also need to overcome intersymbol interference and multiple access and disturb, carry out demodulation then, namely from signal, recover wherein entrained information.
Then, carry out deinterleaving and handle 12, form bit and merge owing in the business datum that transmitting terminal sends systematic bits and each check bit interweaved according to certain rules; Then must recover data by deinterleaving at receiving terminal, the data that are about to the bit merging are divided into systematic bits and check bit again.In the present embodiment, described business datum is the HSDPA data, transmitting terminal is sent to receiving terminal with the form of Turbo code with this business datum, described Turbo code comprises systematic bits, first check bit and second check bit, after handling 12 through deinterleaving so, this business datum correspondingly is divided into systematic bits, first check bit and second check bit.Then, carry out descrambling 13, the business datum after the scrambling of transmitting terminal transmission is soon carried out descrambling, to recover original business datum.Above-mentioned joint-detection demodulation, deinterleaving processing and descrambling are techniques well known, and its detailed process is not given unnecessary details at this.
In the present embodiment, receiving terminal is to be the cycle to receive described business datum with each subframe, and each subframe comprises a transmission block (TB, Transport block) data, according to relevant communication protocol, described transport block data is divided into several encoding blocks (CB, Code Block) data.Therefore, in the present embodiment, it is that unit carries out joint-detection demodulation, deinterleaving processing and descrambling that receiving terminal receives after the business datum with the transport block data, and comprises a plurality of encoding block data in this transport block data, and described transport block data is soft Bit data.
As described in step S2, be that unit separates the secondary rate coupling and obtains matched data with the encoding block data of predetermined quantity.
Unlike the prior art, 14 o'clock be that encoding block data with predetermined quantity are that unit carries out to separating through the transport block data behind the descrambling that secondary rate mates, particularly, can be the encoding block data of predetermined quantity to be separated the secondary rate coupling at every turn, each described encoding block data obtains corresponding matched data after separating the secondary rate coupling, therefore also be that encoding block data with predetermined quantity are that unit handles in subsequent process, thereby reduce the memory capacity of buffer memory (first spatial cache 21) in the sheet.Described predetermined quantity is less than the sum of the encoding block data in the transport block data.Those skilled in the art know, transmitting terminal is when sending business datum, because for adapting to the scheduling of wireless environment variation, be carried on business datum on the transmission channel (in the present embodiment for HS-DSCH channel) at different Transmission Time Intervals (Transmission Time Interval, TTI) may adopt different radio bearer modes (as different channel encoding rates in, modulation system and physical channel resources), at different radio bearer modes, bits of traffic data will be repeated or punch after chnnel coding, total bit rate after making transmission channel multiplexing is complementary with the resource of the DPCH of distributing (being the HS-DSCH channel in the present embodiment), so transmitting terminal will carry out the rate-matched processing to the business datum that sends.Correspondingly, handle with regard to needing to make to separate rate-matched at receiving terminal, i.e. the contrary of rate-matched processing handled.In this step, to the number of transport blocks behind the descrambling according to this encoding block data of predetermined quantity be that unit separates secondary rate coupling 14 to obtain corresponding matched data, the concrete processing procedure of wherein said solution secondary rate coupling is technology as well known to those skilled in the art, does not repeat them here.
As described in step S3, if the current described transport block data that receives is new data, then the matched data with the encoding block data of predetermined quantity is stored in first spatial cache; If the current described transport block data that receives is data retransmission, with the matched data of the encoding block data of predetermined quantity be stored in second spatial cache in obtain merging data and be stored in described first spatial cache with the corresponding Backup Data merging of described matched data.
Particularly, when receiving terminal is carried on the business datum of descending transmission channel at demodulating and decoding, need to handle 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 the HS-DSCH channel, and the down control channel corresponding with described HS-DSCH channel is the HS-SCCH channel.Therefore, receiving terminal is wanted earlier the HS-SCCH channel of the current subframe of demodulating and decoding (current transport block data in other words), and according to the indication information of described HS-SCCH channel described transport block data is handled.Wherein, described indication information comprises HARQ process numbering (HARQ process information) and new data indication (New data indicator), the HS-DSCH channel transmission data that receiving terminal is determined according to HARQ process numbering is to belong to which HARQ process, and what transmission was determined in indication according to new data is new data or data retransmission.
In this step, if the current described transport block data that receives is new data, then the matched data with the encoding block data of predetermined quantity is stored in first spatial cache 21.Wherein, memory space in the system level chip (SOC) that described first spatial cache 21 is receiving terminal, further, described first spatial cache 21 is divided into three parts, deposits systematic bits, first check bit and second check bit of the matched data (Turbo code) of encoding block data respectively.
The matched data of the described encoding block data of predetermined quantity is stored in first spatial cache 21 can separates first time rate coupling 15 for reading described matched data in the subsequent treatment, and then the encoding block data of separating after the first time rate coupling are carried out channel-decoding 16, 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 encoding block data is stored in described first spatial cache 21, can reduces the memory capacity of described first spatial cache 21 so to greatest extent.
In this step, if receiving terminal determines that according to the indication information of described HS-SCCH channel the current described transport block data that receives is data retransmission, with the matched data of the encoding block data of the predetermined quantity of described data retransmission (transport block data) be stored in described second spatial cache 22 in merge with the corresponding Backup Data of described matched data and to obtain merging data and to be stored in described first spatial cache 21.
In the present embodiment, the memory space that the system level chip (SOC) that described second spatial cache 22 is receiving terminal is outer has backed up matched data or the merging data of all encoding block data in the transport block data of all described HARQ processes in described second spatial cache 22.Therefore, if the current transport block data that receives is data retransmission, then with the matched data of the encoding block data of predetermined quantity in the described data retransmission with back up to described second spatial cache 22 in merge with the corresponding Backup Data of described matched data and to obtain merging data.
Specifically, the HARQ process number that comprises according to described indication information can determine that the current transport block data that receives is the data retransmission of which HARQ process.Need to prove, because in the TD-SCDMA communication system, have only transport block data to have check code (cyclic redundancy check (CRC) code), and the encoding block data do not comprise check code, therefore after the encoding block data of predetermined quantity are carried out channel-decoding 16, need just to carry out when by the time the number of described encoding block data is enough to constitute a transport block data verification 17 (cyclic redundancy check (CRC)).
Then, as described in step S2, be that unit separates the secondary rate coupling and obtains matched data to described data retransmission according to the encoding 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 with described data retransmission in the matched data of encoding block data of predetermined quantity merge and obtain being stored in described first spatial cache 21 again behind the merging data.In the present embodiment, the mode of described merging is that incremental redundancy merges (IR combine), it is data retransmission and Backup Data to be carried out the addition merging obtain merging data that described incremental redundancy merges, the detailed process that described incremental redundancy merges is technology as well known to those skilled in the art, does not repeat them here.
In the present embodiment, 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 after before having merged through one or many) that has backed up to the encoding block data of the predetermined quantity in described second spatial cache 22 in described second spatial cache 22, and described encoding block data check errors behind the process channel-decoding.That is to say, with be stored in the matched data of described encoding block data of the predetermined quantity in first spatial cache 21 or merging data back up to described second spatial cache 22 be for the current transport block data that receives follow-up through the situation of separating check errors behind first time rate coupling, the channel-decoding under, can be used as Backup Data and follow-up data retransmission and merge.
In other embodiments, for example in the TD-LTE communication system, not only transport block data has check code, and each the encoding block data in the described transport block data also respectively carry check code.Therefore, after the encoding block data of predetermined quantity are carried out channel-decoding 16, can carry out verification to the encoding block data one by one, as long as check errors appears in one of them encoding block data, then determine described transport block data decoding error.Receiving terminal sends to transmitting terminal constantly in regulation and whether correctly receives sign.Transmitting terminal then can resend to receiving terminal according to the transport block data of sign with check errors.If receiving terminal is current receive this data retransmission after, be that unit separates the secondary rate coupling and obtains matched data to described data retransmission according to the encoding 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 encoding block data of the predetermined quantity of described Backup Data and described data retransmission merged obtain being stored in described first spatial cache 21 again behind the merging data.
Similarly, in the present embodiment, the mode of described merging is that incremental redundancy merges (IR combine), it is data retransmission and Backup Data to be carried out the addition merging obtain merging data that described incremental redundancy merges, the detailed process that described incremental redundancy merges is technology as well known to those skilled in the art, does not repeat them here.
As described in step S4, current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache 21 separated first time rate coupling 15 and channel-decoding 16.
In the present embodiment, as long as store matched data or the merging data of predetermined quantity in described first spatial cache 21, the matched data or the merging data that just begin to read the encoding block data of the predetermined quantity in described first spatial cache 21 are separated first time rate coupling 15 and channel-decoding 16.Wherein, the detailed process of described solution first time rate coupling and channel-decoding does not repeat them here for well known to a person skilled in the art technology.
Further, as described in step S5, after the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache 21 or merging data are separated first time rate coupling 15, current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache 21 backed up to described second spatial cache 22, and matched data or the merging data with the encoding block data of follow-up predetermined quantity is stored in described first spatial cache 21 then.
Specifically, to the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache 21 or merging data through after solution first time rate coupling 15, proceed channel-decoding 16.Further, because to the matched data of the encoding block data that are stored in the predetermined quantity in described first spatial cache 21 or the processing that merging data is understood first time rate coupling 15, just these current matched data or merging datas that is stored in the encoding block data of the predetermined quantity in described first spatial cache 21 can be backed up to described second spatial cache 22, so just vacate described first spatial cache 21.Can continue execution in step S2 and step S3 this moment to the encoding block data of follow-up predetermined quantity, that is: if described transport block data is new data, then the encoding block data of follow-up predetermined quantity is separated the matched data that secondary rate coupling obtains and be stored in first spatial cache 21; If described transport block data is data retransmission, then the encoding block data of follow-up predetermined quantity are separated in matched data that secondary rate coupling obtains and described second spatial cache 22 to merge with the corresponding Backup Data of described matched data and obtain being stored in described first spatial cache 21 again behind the merging data, thereby make described first spatial cache 21 recycle.
Further, in the present embodiment, above-mentioned finish the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache or merging data separated the first time rate coupling after, can be described matched data to the current encoding block data that are stored in the predetermined quantity in described first spatial cache 21 or process that merging data carries out channel-decoding 16 can be with will currently being stored in described first spatial cache 21 matched data or the merging data of the encoding block data of interior predetermined quantity back up to the described second spatial cache executed in parallel.That is to say, the current backup procedure that is stored in matched data in first spatial cache 21 or merging data is stored in matched data in first spatial cache 21 or the channel-decoding process executed in parallel of merging data with same these, can reduce the integral body decoding time delay of communication terminal like this.
Be 1 for instance with predetermined quantity, when the matched data of the 1st CB data in first spatial cache 21 (the TB data under the 1st CB data are new data) or merging data (the TB data under the 1st CB data are data retransmission) being separated after the first time rate coupling finishes, matched data or the merging data also carried out in the channel-decoding that carries out the 1st CB data the 1st CB data in first spatial cache 21 back up to second spatial cache 22 as the step of the Backup Data of the 1st CB data, and matched data or the merging data with the 2nd CB data is stored in described first spatial cache 21 then; Continuation is separated first time rate coupling and channel-decoding to matched data or the merging data of the 2nd CB data, after solution first time rate coupling is finished, matched data or the merging data also carried out when carrying out channel-decoding the 2nd CB data in first spatial cache 21 back up to second spatial cache 22 as the step of the Backup Data of the 2nd CB data, and matched data or the merging data with the 3rd CB data is stored in described first spatial cache 21 then; Continuation is separated first time rate coupling and channel-decoding to matched data or the merging data of the 3rd CB data ..., by that analogy.
In other embodiments, also can be described matched data to the current encoding block data that are stored in the predetermined quantity in described first spatial cache 21 or process that merging data carries out channel-decoding 16 be stored in described first spatial cache, 21 executed in parallel with matched data or merging data with the encoding block data of follow-up predetermined quantity.That is to say, in with the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache 21 or process that merging data backs up to described second spatial cache 22, do not carry out the process of channel-decoding 16, but by the time after the backup procedure end, with the matched data of the encoding block data of follow-up predetermined quantity or process that merging data is stored in described first spatial cache 21 with to current matched data through the encoding block data of separating the predetermined quantity after the first time rate coupling 15 or the process executed in parallel that merging data carries out channel-decoding 16, the integral body that also can the reduce communication terminal so to a certain extent time delay of decoding.
Be 1 for instance with predetermined quantity still, after the matched data of the 1st CB data in first spatial cache 21 or merging data solution first time rate coupling are finished, earlier matched data or the merging data with the 1st CB data in first spatial cache 21 backs up to second spatial cache 22 as the Backup Data of the 1st CB data, also carries out the step that matched data or merging data with the 2nd CB data are stored in described first spatial cache 21 when carrying out the channel-decoding of the 1st CB data then; Continuation is separated first time rate coupling and channel-decoding to matched data or the merging data of the 2nd CB data, after solution first time rate coupling is finished, earlier matched data or the merging data with the 2nd CB data in first spatial cache 21 backs up to second spatial cache 22 as the Backup Data of the 2nd CB data, also carries out the step that matched data or merging data with the 3rd CB data are stored in described first spatial cache 21 when carrying out the channel-decoding of the 2nd CB data then; Continuation is separated first time rate coupling and channel-decoding to matched data or the merging data of the 3rd CB data ..., by that analogy.
Further, because at receiving terminal, usually it is long the encoding block data of predetermined quantity to be carried out time of channel-decoding, therefore the matched data of the encoding block data of current predetermined quantity or merging data are being carried out before channel-decoding finishes, can finish current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache 21 backed up to described second spatial cache 22, and the encoding block data of follow-up predetermined quantity are separated secondary rate coupling obtain matched data and be stored in first spatial cache 21, perhaps with the matched data of the encoding block data of predetermined quantity be stored in described second spatial cache 22 in obtain merging data with the corresponding Backup Data merging of described matched data and be stored in the process of described first spatial cache 21.That is to say, described matched data or process that merging data carries out channel-decoding 16 and the backup procedure that will currently be stored in matched data in first spatial cache 21 or merging data and with the matched data of the encoding block data of follow-up predetermined quantity or the process executed in parallel that merging data is stored in described first spatial cache 21 to the current encoding block data that are stored in the predetermined quantity in described first spatial cache 21 can be gone up to greatest extent like this and reduce the whole time delay of decoding of communication terminal.
No matter be the situation of above-mentioned any executed in parallel, the technical program can both also reduce the time delay of the whole decoding of communication terminal when saving described first spatial cache 21.
In the TD-SCDMA communication system, owing to have only transport block data to have check code (cyclic redundancy check (CRC) code), and the encoding block data do not comprise check code, therefore when the number of described encoding block data or merging data is enough to constitute transport block data, transport block data are carried out verification 17.If verification succeeds determines that then described transport block data (described subframe) receives successfully, send to transmitting terminal and receive successfully indication; If the verification failure is then sent the indication that takes defeat to transmitting terminal.Above-mentioned solution first time rate coupling, channel-decoding and verification all are technology as well known to those skilled in the art, do not give unnecessary details at this.
In other embodiments, for example in the TD-LTE communication system, different with the TD-SCDMA communication system is, because each encoding block data has check code, so each described encoding block data can independently be carried out verification through behind the channel-decoding.If verification succeeds, determine that then described encoding block data receive successfully, all encoding block data verification succeeds all can determine that described transport block data receives successfully in described transport block data, indicates stipulating that the moment receives successfully to the transmitting terminal transmission; As long as the failure of one of them encoding block data check determines that namely the transport block data at this encoding block data place takes defeat, wait to handle all data after, receiving terminal constantly sends the indication that takes defeat to transmitting terminal in regulation.
The inventor is by relatively prior art and the technical program are found, be in the TD-SCDMA system of 4.2Mbps in the HSDPA message transmission rate, comprise 5 encoding block data in each subframe (transport block data), described transport block data is soft Bit data, byte of a soft bit stealing (Byte, i.e. 8bit).Adopt the coding/decoding method of prior art, after being the disposable solution secondary rate coupling and incremental redundancy merging (IR combine) of finishing all encoding block data of a subframe (5ms) earlier, be the method that unit separates first time rate coupling, channel-decoding to current transport block data with encoding block data one by one again, first spatial cache need preserve that the soft Bit data amount of all transport block data after separating the secondary rate coupling is 63360byte in the subframe in the SOC sheet of receiving terminal.But the coding/decoding method that the technical program provides, suppose that described predetermined quantity is 1, be that unit separates secondary rate coupling and incremental redundancy merges with the encoding block data namely, and previous encoding block data are separated channel-decoding after the first time rate coupling and the solution secondary rate of present encoding blocks of data is mated and incremental redundancy merging process executed in parallel.Can draw, it may maximum soft Bit data amount be (5114 * 3+12)=15354Byte to encoding block data after separating the secondary rate coupling.Further in order to simplify realization, at receiving terminal, reduce the degree of coupling of separating between secondary rate matching unit and the follow-up solution first time rate matching unit, can increase some redundant spaces to first spatial cache in the SOC sheet of receiving terminal.Here in the communication system with actual design, increasing by 10% redundancy for first spatial cache in the SOC sheet of receiving terminal is example, the big or small total amount of first spatial cache is 16896Byte, wherein, three part systematic bits memory spaces, the first check bit memory space and the second check bit memory space of described first spatial cache, the memory space of three parts respectively disposes 5632Byte.Through relatively obtaining, the technical program compared to existing technologies, described first spatial cache reduces buffer memory 46.468kByte in the SOC sheet of receiving terminal.Further, according to the description of the invention described above embodiment, the technical program has also reduced the time delay of the whole decoding of receiving terminal simultaneously.
The embodiment of the invention also provides a kind of decoding device of communication system, is used for the business datum of descending transmission channel is decoded.As shown in Figure 4 be the structural representation of 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 the transport block data behind the reception descrambling, wherein said transport block data comprises the encoding block data.Separate secondary rate matching unit 32, separate the secondary rate coupling for the encoding block data of the predetermined quantity that described receiving element 31 is received and obtain matched data.Separating secondary rate matching unit 32 is unit with the encoding block data of predetermined quantity, and the encoding block data in the transport block data that described receiving element 31 is received are separated the secondary rate coupling and obtained matched data.
Decoding unit 36 is used for current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache 34 separated first time rate coupling and channel-decoding.
Need to prove that described first spatial cache 34 in the described decoding device 3 is equivalent to first spatial cache 21 described in Fig. 3, described second spatial cache 35 in the described decoding device 3 is equivalent to described second spatial cache 22 among Fig. 3.
In the present embodiment, described receiving element 31 is before receiving through the transport block data behind the descrambling, described transport block data is also passed through joint-detection demodulation, deinterleaving processing and descrambling, wherein said joint-detection demodulation, deinterleaving processing and descrambling process are technology as well known to those skilled in the art, do not repeat them here.Need to prove, described decoding device 3 is to be the cycle to receive described business datum with each subframe, each subframe comprises a transmission block (TB, Transport block) data, according to relevant communication protocol, described transport block data is divided into several encoding blocks (CB, Code Block) data.Therefore, in the present embodiment, it is that unit carries out joint-detection demodulation, deinterleaving processing and descrambling that receiving terminal receives after the business datum with the transport block data, and comprises a plurality of encoding block data in this transport block data.
Then, separate the secondary rate coupling by the encoding block data of 32 pairs of predetermined quantities of described solution secondary rate matching unit and obtain matched data.Unlike the prior art be, in the present embodiment, be that encoding block data with predetermined quantity are that unit separates the secondary rate coupling in the transport block data that described receiving element 31 is received, in subsequent treatment, the encoding block data of predetermined quantity can be stored in first spatial cache 34 like this, thus the memory capacity of saving described first spatial cache 34.
Then, described data processing unit 33 can determine that the current transport block data that receives is new data or data retransmission 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 the HS-DSCH channel, and the down control channel corresponding with described HS-DSCH channel is the HS-SCCH channel.
If determine that according to the indication information of described HS-SCCH channel the current described transport block data that receives is new data, then the matched data with the encoding block data of predetermined quantity is stored in first spatial cache 34.Wherein, the memory space in the system level chip (SOC) that described first spatial cache 34 is receiving terminal, described first spatial cache 34 is used for matched data or the merging data of the encoding block data of storing predetermined quantity.
If determine that according to the indication information of described HS-SCCH channel the current described transport block data that receives is data retransmission, with the matched data of the encoding block data of the predetermined quantity after described solution secondary rate matching unit 32 is handled be stored in described second spatial cache 35 in obtain merging data and be stored in described first spatial cache 34 with the corresponding Backup Data merging of described matched data.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 encoding block data is stored in described first spatial cache 34, can saves the memory capacity of described first spatial cache 34 so to greatest extent.
In the present embodiment, the memory space that the system level chip (SOC) that described second spatial cache 35 is receiving terminal is outer has backed up matched data or the merging data of all encoding block data in the transport block data of all HARQ processes in described second spatial cache 35.
Particularly, according to described indication information, wherein, described indication information comprises HARQ process numbering (HARQ process information) and new data indication (New data indicator), receiving terminal determines that according to HARQ process numbering the HS-DSCH channel transmission data is to belong to which HARQ process, and what transmission was determined in indication according to new data is new data or data retransmission.Need to prove, because in the TD-SCDMA communication system, have only transport block data to have check code (cyclic redundancy check (CRC) code), and the encoding block data do not comprise check code, therefore after the encoding block data of predetermined quantity are carried out channel-decoding through channel-decoding unit (not shown) in the described decoding unit 36, need just to carry out verification (cyclic redundancy check (CRC)) by the verification unit (not shown) when by the time the number of described encoding block data is enough to constitute a 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 merge with the matched data of the encoding block data of the predetermined quantity of described data retransmission and to obtain being stored in described first spatial cache 34 again behind the merging data.In the present embodiment, the mode of described merging is that incremental redundancy merges (IR combine), it is data retransmission and Backup Data to be carried out the addition merging obtain merging data that described incremental redundancy merges, the detailed process that described incremental redundancy merges is technology as well known to those skilled in the art, does not repeat them here.
In other embodiments, for example in the TD-LTE communication system, not only transport block data has check code, and each the encoding block data in the described transport block data also respectively carry check code.Therefore, after the encoding block data of predetermined quantity are carried out channel-decoding through the channel-decoding unit (not shown) in the described decoding unit 36, can carry out verification to the encoding block data one by one by the verification unit (not shown), as long as check errors appears in one of them encoding block data, then determine described transport block data decoding error, after treating that whole TB decoding is finished, send whether correctly reception indication in particular moment to transmitting terminal.Transmitting terminal resends the transport block data of check errors to receiving terminal.If described receiving element 31 is current receive data retransmission after, be that unit separates the secondary rate coupling and obtains matched data by 32 pairs of described data retransmissions of described solution secondary rate matching unit according to the encoding block data of predetermined quantity equally, and the matched data of predetermined quantity is 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 encoding block data of the predetermined quantity of described Backup Data and described data retransmission merged obtain being stored in described first spatial cache 34 again behind the merging data.Similarly, in described other embodiment, the mode of described merging is that incremental redundancy merges (IR combine), it is data retransmission and Backup Data to be carried out the addition merging obtain merging data that described incremental redundancy merges, the detailed process that described incremental redundancy merges is technology as well known to those skilled in the art, does not repeat them here.
Then, separate first time rate coupling and channel-decoding by 36 pairs of current matched data or merging datas that are stored in the encoding block data of the predetermined quantity in described first spatial cache 34 of described decoding unit.
In the present embodiment, as long as store 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 the described decoding unit 36 just begins to read matched data or the merging data of the predetermined quantity in described first spatial cache 34 and separates the first time rate coupling; Then, the channel-decoding unit (not shown) in the described decoding unit 36 is to carrying out channel-decoding through matched data (encoding block data) or the merging data of separating after first time rate is mated.
Further, after solution first time rate matching unit in described decoding unit 36 is separated the first time rate coupling to the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache 34 or merging data, by described backup units 37 current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache 34 backed up to described second spatial cache 35, and then by described data processing unit 33 matched data or the merging data of the encoding block data of follow-up predetermined quantity is stored in described first spatial cache 34.
Specifically, 36 pairs of described decoding units are current be stored in the matched data of encoding block data of the predetermined quantity in described first spatial cache 34 or merging data carry out channel-decoding and described backup units 37 matched data of the current encoding block data that are stored in the interior predetermined quantity of described first spatial cache 34 or merging data are backed up to described second spatial cache 35 can executed in parallel, can reduce the decoding time delay of communication terminal like this.
Perhaps, 36 pairs of described decoding units are current be stored in the matched data of encoding block data of the predetermined quantity in described first spatial cache 34 or merging data carry out channel-decoding and described data processing unit 33 matched data of the encoding block data of follow-up predetermined quantity or merging data are stored in described first spatial cache 34 can executed in parallel, so also can reduce the decoding time delay of communication terminal.
Further, because at receiving terminal, usually it is long the encoding block data of predetermined quantity to be carried out time of channel-decoding, therefore the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache 34 of 36 pairs of described decoding units or process that merging data carries out channel-decoding and described backup units 37 will currently be stored in the backup procedure of matched data in first spatial cache 34 or merging data and described data processing unit 33 with the process executed in parallel that matched data or the merging data of the encoding block data of follow-up predetermined quantity is stored in described first spatial cache 34, can go up to greatest extent like this and reduce the time delay that communication terminal integral body is decoded.
Therefore, no matter be the situation of above-mentioned any executed in parallel, the technical program can both also reduce the time delay of the whole decoding of communication terminal when saving described first spatial cache 34.
In the TD-SCDMA communication system, owing to have only transport block data to have check code (cyclic redundancy check (CRC) code), and the encoding block data do not comprise check code, therefore when the number of described encoding block data or merging data is enough to constitute transport block data, by verification unit transport block data is carried out verification.If verification succeeds determines that then described transport block data (described subframe) receives successfully, sends reception to transmitting terminal and successfully indicates; If the verification failure is then sent the indication that takes defeat to transmitting terminal.Above-mentioned solution first time rate coupling, channel-decoding and verification all are technology as well known to those skilled in the art, do not give unnecessary details at this.
In other embodiments, for example in the TD-LTE communication system, different with the TD-SCDMA communication system is, because each encoding block data has check code, so each described encoding block data can independently be carried out verification through behind the channel-decoding.If verification succeeds, determine that then described encoding block data receive successfully, all encoding block data verification succeeds all can determine that described transport block data receives successfully in described transport block data, receives successfully to the transmitting terminal transmission and indicates; As long as one of them encoding block data check failure determines that namely the transport block data at this encoding block data place takes defeat, receiving terminal then sends the indication that takes defeat to transmitting terminal.
The embodiment of the invention also provides a kind of communication terminal, described communication terminal is as receiving terminal, the business datum that reception sends from transmitting terminal (being generally the base station), at least the decoding device 3 that comprises communication system as shown in Figure 4 in the described communication terminal is used for the business datum of descending transmission channel is decoded.In the present embodiment, described communication system is the 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 is not only saved first spatial cache (being the spatial cache in the SOC sheet) of communication terminal, has also reduced the time delay of the whole decoding of communication terminal simultaneously.
Though the present invention with preferred embodiment openly as above; but it is not to limit the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can utilize method and the technology contents of above-mentioned announcement that technical solution of the present invention is made possible change and modification; therefore; every content that does not break away from technical solution of the present invention; to any simple modification, equivalent variations and modification that above embodiment does, all belong to the protection range of technical solution of the present invention according to technical spirit of the present invention.
Claims (23)
1. the coding/decoding method in the communication system is used for the business datum of descending transmission channel is decoded, and it is characterized in that, comprising:
Transport block data behind the reception descrambling, wherein said transport block data comprises the encoding block data;
Be that unit separates the secondary rate coupling and obtains matched data with the encoding block data of predetermined quantity;
If the current described transport block data that receives is new data, then the matched data with the encoding block data of predetermined quantity is stored in first spatial cache; If the current described transport block data that receives is data retransmission, with the matched data of the encoding block data of predetermined quantity be stored in second spatial cache in obtain merging data and be stored in described first spatial cache with the corresponding Backup Data merging of described matched data;
Current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache separated first time rate coupling and channel-decoding;
After the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache or merging data are separated the first time rate coupling, current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache backed up to described second spatial cache, and matched data or the merging data with the encoding block data of follow-up predetermined quantity is stored in described first spatial cache then.
2. the coding/decoding method in the communication system according to claim 1, it is characterized in that described matched data or merging data to the current encoding block data that are stored in the predetermined quantity in described first spatial cache carries out channel-decoding and current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache backed up to the described second spatial cache executed in parallel.
3. the coding/decoding method in the communication system according to claim 1, it is characterized in that described matched data or merging data to the current encoding block data that are stored in the predetermined quantity in described first spatial cache carries out channel-decoding and be stored in the described first spatial cache executed in parallel with matched data or merging data with the encoding block data of follow-up predetermined quantity.
4. the coding/decoding method in the communication system according to claim 1 is characterized in that, determines that according to the indication information of the down control channel corresponding with described descending transmission channel the current described transport block data that receives is new data or data retransmission.
5. the coding/decoding method in the communication system according to claim 1, it is characterized in that, the Backup Data corresponding with described matched data is matched data or the merging data that has backed up to the encoding block data of the predetermined quantity in described second spatial cache in described second spatial cache, and described encoding block data check errors behind the process channel-decoding.
6. the coding/decoding method in the communication system according to claim 1, it is characterized in that, the matched data of the encoding block data of described predetermined quantity be stored in second spatial cache in the mode that merges with the corresponding Backup Data of described matched data be that incremental redundancy merges.
7. the coding/decoding method in the communication system according to claim 1 is characterized in that, described predetermined quantity is 1-3.
8. the coding/decoding method in the communication system according to claim 1 is characterized in that, described first spatial cache is used for matched data or the merging data of the encoding block data of storing predetermined quantity; Described second spatial cache is used for matched data or the merging data of all encoding block data of the described transport block data of backup.
9. the coding/decoding method in the communication system according to claim 1 is characterized in that, described transport block data is soft Bit data.
10. the coding/decoding method in the communication system according to claim 1 is characterized in that, described communication system is the TD-SCDMA communication system.
11. the coding/decoding method in the communication system according to claim 10 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.
12. the decoding device of a communication system is used for the business datum of descending transmission channel is decoded, and it is characterized in that, comprising:
Receiving element, for the transport block data behind the reception descrambling, wherein said transport block data comprises the encoding block data;
Separate the secondary rate matching unit, separate the secondary rate coupling for the encoding block data of the predetermined quantity that described receiving element is received and obtain matched data;
Data processing unit, being used in the current described transport block data that receives of described receiving element is new data, then the matched data with the encoding block data after described solution secondary rate matching unit is handled of predetermined quantity is stored in first spatial cache; Be data retransmission in the current described transport block data that receives of described receiving element, with the matched data of the encoding block data of the predetermined quantity after described solution secondary rate matching unit is handled be stored in second spatial cache in obtain merging data and be stored in described first spatial cache with the corresponding Backup Data merging of described matched data;
Decoding unit is used for current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache separated first time rate coupling and channel-decoding;
Backup units, be used for after described decoding unit is separated the first time rate coupling to the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache or merging data, current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache backed up to described second spatial cache, by described data processing unit matched data or the merging data of the encoding block data of follow-up predetermined quantity is stored in described first spatial cache then.
13. the decoding device of communication system according to claim 12, it is characterized in that described decoding unit is to the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache or merging data carries out channel-decoding and described backup units backs up to the described second spatial cache executed in parallel with current matched data or the merging data that is stored in the encoding block data of the predetermined quantity in described first spatial cache.
14. the decoding device of communication system according to claim 12, it is characterized in that described decoding unit carries out channel-decoding and described data processing unit to the matched data of the current encoding block data that are stored in the predetermined quantity in described first spatial cache or merging data matched data or the merging data of the encoding block data of follow-up predetermined quantity is stored in the described first spatial cache executed in parallel.
15. the decoding device of communication system according to claim 12, it is characterized in that described data processing unit determines that according to the indication information of the down control channel corresponding with described descending transmission channel the current described transport block data that receives is new data or data retransmission.
16. the decoding device of communication system according to claim 12, it is characterized in that, the Backup Data corresponding with described matched data is matched data or the merging data that has backed up to the encoding block data of the predetermined quantity in described second spatial cache in described second spatial cache, and described encoding block data check errors behind the process channel-decoding.
17. the decoding device of communication system according to claim 12, it is characterized in that, the matched data of the encoding block data of described predetermined quantity be stored in second spatial cache in the mode that merges with the corresponding Backup Data of described matched data be that incremental redundancy merges.
18. the decoding device of communication system according to claim 12 is characterized in that, described predetermined quantity is 1-3.
19. the decoding device of communication system according to claim 12 is characterized in that, described first spatial cache is used for matched data or the merging data of the encoding block data of storing predetermined quantity; Described second spatial cache is used for matched data or the merging data of all encoding block data of the described transport block data of backup.
20. the decoding device of communication system according to claim 12 is characterized in that, described transport block data is soft Bit data.
21. the decoding device of communication system according to claim 12 is characterized in that, described communication system is the TD-SCDMA communication system.
22. the decoding device of communication system according to claim 21 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.
23. a communication terminal is characterized in that, comprises the decoding device of each described communication system in the claim 12 to 22.
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| CN107646179A (en) * | 2015-06-23 | 2018-01-30 | 英特尔Ip公司 | Communication equipment and the method for data storage |
| CN109716696A (en) * | 2016-07-28 | 2019-05-03 | 三星电子株式会社 | The method and apparatus of hybrid automatic repeat-request process are managed in mobile communication system |
| US11569943B2 (en) | 2016-07-28 | 2023-01-31 | Samsung Electronics Co., Ltd. | Method and apparatus for managing hybrid automatic repeat request process in mobile communication system |
| CN111492607A (en) * | 2018-01-06 | 2020-08-04 | 上海朗帛通信技术有限公司 | Method and device in communication node for wireless communication |
| US11296843B2 (en) | 2018-01-06 | 2022-04-05 | Shanghai Langbo Communication Technology Company Limited | Method and device in communication node for wireless communication |
| CN111492607B (en) * | 2018-01-06 | 2023-01-20 | 上海朗帛通信技术有限公司 | Method and device in communication node for wireless communication |
| US11711185B2 (en) | 2018-01-06 | 2023-07-25 | Shanghai Langbo Communication Technology Company Limited | Method and device in communication node for wireless communication |
| CN111884775A (en) * | 2020-07-15 | 2020-11-03 | 太仓市同维电子有限公司 | HARQ transmission device and method based on shared cache |
| CN111884775B (en) * | 2020-07-15 | 2024-02-27 | 太仓市同维电子有限公司 | HARQ transmission device and method based on shared buffer |
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