CN105530071A - Uplink signal coding method based on code block segmentation and terminal - Google Patents
Uplink signal coding method based on code block segmentation and terminal Download PDFInfo
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Abstract
The invention discloses an uplink signal coding method based on code block segmentation and a terminal. The method comprises steps that bit level processing on a transmission block is carried out to acquire a code block set; scrambling processing on the code block set is carried out to acquire a scrambled code block set; modulation processing on the scrambled code block set is carried out to acquire a modulated code block set; symbol level processing on the modulated code block set is carried out to acquire an uplink signal after cording. According to the uplink signal coding method based on code block segmentation and the terminal, scrambling and modulation processing is on the basis of the code block not the whole transmission block length, so processing amount of an LTE system is reduced.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of upward signal coding method based on code block segmentation and terminal.
Background technology
Current LTE (LongTermEvolution, Long Term Evolution) in system, up enhancement mode multi-antenna technology is introduced in up link, based on 4 transmitting antenna precodings, maximumly support 4 sheaf space multiplexing transmission modes, in this case for maximum support 64QAM (QuadratureAmplitudeModulation, quadrature amplitude modulation) modulation system, corresponding transmission block bit number adds a lot, and base station receives treating capacity to be increased greatly.
The process of the bit-level of LTE system generally adopts Turbo to encode, and the maximum input bit length of Turbo code is for being defined as 6144 bits.The situation of 6144 bits is greater than owing to there is transmission block bit number, therefore have employed code block segmentation technology in LTE system, namely by calculating the code block number that " transmission block bit number/6144 " obtain splitting, based on code block number, code block segmentation is carried out to transmission block, bit number in each code block after segmentation is less than or equal to 6144 bits, for the process of Turbo coding and decoding.
Fig. 1 is the upward signal coding FB(flow block) of the PUSCH (PhysicalUplinkSharedChannel, Physical Uplink Shared Channel) of LTE system.Wherein, the transmission block of business datum is through transmission block CRC (CyclicRedundancyCheck, cyclic redundancy check (CRC)) coding, carry out code block segmentation, each code block after segmentation carries out code block CRC coding, chnnel coding, rate-matched process, afterwards whole code block is carried out code block cascade, form the bit sequence based on transmission block, carry out multiplexing and interleaving treatment again, at the multiplexing CQI (Channelqualityindicator in transmission block bit sequence starting position, channel quality indicates) sequences of code bits, RI (RankIndication is added in relevant position in interleaving process, order indicates) and ACK (Acknowledge, response) coded-bit, scrambling and modulation treatment is carried out through multiplexing and whole sequence that is interleaving treatment after code-aiming block cascade.
In LTE system, the code block process of existing upward signal coding side is only carried out in bit-level, and scrambling, modulation process based on whole transport block length, due to corresponding TBS (TransportBlockSize, transmission block size) bit value adds, for large transmission block, its treating capacity will increase greatly.Such as, for the treated length of scrambling, in 64QAM modulation system situation, due to the increase of TBS bit number, the treating capacity of scrambling increases a lot than treating capacity during QPSK (QuadraturePhaseShiftKeying, Quadrature Phase Shift Keying) and 16QAM.For the process of modulation, because symbol-modulated bit wide during 64QAM is 6 bits, compared with symbol-modulated during 16QAM, the treating capacity that its modulation maps is 1.5 times of original treating capacity.
Because the process of existing scrambling and modulation processes based on whole transport block length, along with LTE system configuration complicated, the treating capacity of scrambling and modulation progressively increases, and is unfavorable for the real-time process of LTE system.
Summary of the invention
Technical problem to be solved by this invention is that the process of existing scrambling and modulation processes based on whole transport block length, along with LTE system configuration complicated, the treating capacity of scrambling and modulation progressively increases, and is unfavorable for the real-time process of LTE system.
For this purpose, first aspect, the present invention proposes a kind of upward signal coding method based on code block segmentation, and described method comprises:
Bit-level process is carried out to transmission block, obtains code block group;
Scrambling process is carried out to described code block group, obtains the code block group after scrambling;
Modulation treatment is carried out to the code block group after described scrambling, obtains the code block group after modulating;
Symbol level process is carried out to the code block group after described modulation, obtains the upward signal after encoding.
Optionally, described bit-level process is carried out to transmission block, comprising:
Transport block cyclic redundancy check CRC coding is carried out to transmission block, and transmission block bit and CRC coded-bit are coupled together carries out the process of bit-level code block comminute, obtain code block;
Code block CRC coding, chnnel coding, rate-matched process are carried out to each code block, obtains code block group.
Optionally, described scrambling process is carried out to described code block group, comprising:
According to the scrambler subsequence group preset, carry out scrambling process to each code block in described code block group, described scrambler subsequence group is split that default intertexture scrambler sequence obtains and corresponding with described code block group scrambler subsequence group.
Optionally, described modulation treatment is carried out to the code block group after described scrambling, obtains the code block group after modulating, comprising:
According to the modulation system preset, carry out modulation treatment to the code block group after described scrambling, described modulation system comprises QPSK, 16QAM or 64QAM.
Optionally, described symbol level process is carried out to the code block group after described modulation before, described method also comprises:
According to the bit of control signal correspondence position in the intertexture scrambler sequence preset, carry out scrambling process to control signal, described control signal comprises channel quality indicator (CQI), order instruction RI and response ACK;
According to the modulation system preset, carry out modulation treatment to described CQI, obtain CQI symbol sebolic addressing, carry out QPSK modulation treatment to described RI and described ACK, obtain RI symbol sebolic addressing and ACK symbol sebolic addressing, described modulation system comprises QPSK, 16QAM or 64QAM.
Optionally, described symbol level process is carried out to the code block group after described modulation, comprising:
Code block group after described modulation is cascaded up, obtains data symbol sequence;
Described CQI symbol sebolic addressing is placed on the beginning location of described data symbol sequence; RI symbol sebolic addressing and ACK symbol sebolic addressing are placed on the predeterminated position in described data symbol sequence, and delete the data symbol of described predeterminated position, obtain the data symbol sequence of access control signal;
The data symbol sequence of described access control signal is interweaved, obtains the upward signal after encoding.
Second aspect, the present invention also proposes a kind of terminal, and described terminal comprises:
Bit-level processing unit, for carrying out bit-level process to transmission block, obtains code block group;
Scrambling processing unit, for carrying out scrambling process to described code block group, obtains the code block group after scrambling;
Modulation treatment unit, carries out modulation treatment to the code block group after described scrambling, obtains the code block group after modulating;
Symbol level processing unit, for carrying out symbol level process to the code block group after described modulation, obtains upward signal;
Optionally, described bit-level processing unit, specifically for:
Transport block cyclic redundancy check CRC coding is carried out to transmission block, and transmission block bit and CRC coded-bit are coupled together carries out the process of bit-level code block comminute, obtain code block;
Code block CRC coding, chnnel coding, rate-matched process are carried out to each code block, obtains code block group.
Optionally, described scrambling processing unit, specifically for:
According to the scrambler subsequence group preset, carry out scrambling process to each code block in described code block group, described scrambler subsequence group is that the intertexture scrambler sequence that segmentation is preset obtains, and corresponding with described code block group.
Optionally, described modulation treatment unit, specifically for:
According to the modulation system preset, carry out modulation treatment to the code block group after described scrambling, described modulation system comprises QPSK, 16QAM or 64QAM.
Compared to prior art, the upward signal coding method based on code block segmentation of the present invention and terminal by by the process of scrambling and modulation based on code block but not whole transport block length, thus reduce the treating capacity of LTE system.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 shows the upward signal coding FB(flow block) of the PUSCH channel of existing LTE system;
Fig. 2 shows the upward signal coding method flow chart based on code block segmentation;
Fig. 3 shows the upward signal coding method flow chart based on code block segmentation;
Fig. 4 shows the terminal structure figure of application based on the upward signal coding method of code block segmentation.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The upward signal coding method flow chart based on code block segmentation as shown in Figures 2 and 3, the present embodiment discloses a kind of upward signal coding method based on code block segmentation, and described method can comprise the following steps:
S1, bit-level process is carried out to transmission block, obtain code block group;
Illustrate, bit-level process can comprise:
Transmission block CRC coding is carried out to transmission block, transmission block bit and CRC coded-bit is coupled together and carries out the process of bit-level code block comminute; Code block CRC coding, chnnel coding, rate-matched process are carried out to each code block, obtains code block group.
S2, scrambling process is carried out to described code block group, obtain the code block group after scrambling;
In embody rule, scrambling process can comprise two aspects:
On the one hand, the scrambling process of control signal:
By control signal: channel quality indicator (CQI), order instruction RI and response ACK bit preset CQI buffer memory, default RI buffer memory and default ACK buffer memory stored in corresponding; According to the bit of control signal correspondence position in the intertexture scrambler sequence preset, scrambling process is carried out to control signal.
On the other hand, the scrambling process of code block group:
Default intertexture scrambler sequence is divided into the scrambler subsequence group corresponding with described code block group; According to described scrambler subsequence group, scrambling process is carried out to each code block in described code block group.
S3, modulation treatment is carried out to the code block group after described scrambling, obtain the code block group after modulating; The modulation treatment of this step is carried out in code block level, specifically comprises:
According to the modulation system preset, carry out modulation treatment to the code block group after described scrambling, described modulation system comprises QPSK, 16QAM, 64QAM.In practical application, for example, the selection of modulation system is determined in LTE system configuration.
According to the modulation system preset, carry out modulation treatment to CQI, obtain CQI symbol sebolic addressing, described modulation system comprises QPSK, 16QAM, 64QAM;
QPSK modulation treatment is carried out to RI and ACK, obtains RI symbol sebolic addressing and ACK symbol sebolic addressing.
S4, symbol level process is carried out to the code block group after described modulation, obtain the upward signal after encoding;
For example, symbol level process can comprise:
Code block group after modulation is cascaded up, obtains data symbol sequence;
CQI symbol sebolic addressing is placed on the beginning location of data symbol sequence; RI symbol sebolic addressing and ACK symbol sebolic addressing are placed on the predeterminated position in data symbol sequence, and delete the data symbol of predeterminated position, obtain the data symbol sequence of access control signal;
The data symbol sequence of access control signal is interweaved, obtains the upward signal after encoding.
The upward signal coding method based on code block segmentation of the present embodiment by by the process of scrambling and modulation based on code block but not whole transport block length, thus reduce the treating capacity of LTE system.The method of the present embodiment is applicable to the Parallel processing designs under hardware environment.
Application is as shown in Figure 4 based on the terminal structure figure of the upward signal coding method of code block segmentation, and the present embodiment discloses a kind of terminal, and described terminal can comprise:
Bit-level processing unit, for carrying out bit-level process to transmission block, obtains code block group;
Scrambling processing unit, for carrying out scrambling process to described code block group, obtains the code block group after scrambling;
Modulation treatment unit, carries out modulation treatment to the code block group after described scrambling, obtains the code block group after modulating;
Symbol level processing unit, for carrying out symbol level process to the code block group after described modulation, obtains upward signal.
The terminal of above-described embodiment can perform the flow process in aforesaid embodiment of the method, and the present embodiment does not describe in detail at this.
The application of the present embodiment based on the upward signal coding method of code block segmentation terminal by by the process of scrambling and modulation based on code block but not whole transport block length, thus reduce the treating capacity of LTE system.The terminal of the present embodiment is applicable to the Parallel processing designs under hardware environment.
It will be understood by those skilled in the art that adaptively to change the unit in embodiment and they are arranged and be in one or more equipment that this embodiment is different.Unit combination in embodiment can be become a module or unit or assembly, and multiple submodule or subelement or sub-component can be put them in addition.Except at least some in such feature and/or process or unit is mutually exclusive part, any combination can be adopted to combine all processes of features all disclosed in this specification and so disclosed any method or equipment or unit.Unless expressly stated otherwise, each feature disclosed in this specification can by providing identical, alternative features that is equivalent or similar object replaces.
In addition, those skilled in the art can understand, although embodiments more described herein to comprise in other embodiment some included feature instead of further feature, the combination of the feature of different embodiment means and to be within scope of the present invention and to form different embodiments.
Although describe embodiments of the present invention by reference to the accompanying drawings, but those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, such amendment and modification all fall into by within claims limited range.
Claims (10)
1. based on a upward signal coding method for code block segmentation, it is characterized in that, described method comprises:
Bit-level process is carried out to transmission block, obtains code block group;
Scrambling process is carried out to described code block group, obtains the code block group after scrambling;
Modulation treatment is carried out to the code block group after described scrambling, obtains the code block group after modulating;
Symbol level process is carried out to the code block group after described modulation, obtains the upward signal after encoding.
2. method according to claim 1, is characterized in that, describedly carries out bit-level process to transmission block, comprising:
Transport block cyclic redundancy check CRC coding is carried out to transmission block, and transmission block bit and CRC coded-bit are coupled together carries out the process of bit-level code block comminute, obtain code block;
Code block CRC coding, chnnel coding, rate-matched process are carried out to each code block, obtains code block group.
3. method according to claim 1, is characterized in that, describedly carries out scrambling process to described code block group, comprising:
According to the scrambler subsequence group preset, carry out scrambling process to each code block in described code block group, described scrambler subsequence group is split that default intertexture scrambler sequence obtains and corresponding with described code block group scrambler subsequence group.
4. method according to claim 1, is characterized in that, describedly carries out modulation treatment to the code block group after described scrambling, obtains the code block group after modulating, comprising:
According to the modulation system preset, carry out modulation treatment to the code block group after described scrambling, described modulation system comprises QPSK, 16QAM or 64QAM.
5. method according to claim 1, is further characterized in that, described symbol level process is carried out to the code block group after described modulation before, described method also comprises:
According to the bit of control signal correspondence position in the intertexture scrambler sequence preset, carry out scrambling process to control signal, described control signal comprises channel quality indicator (CQI), order instruction RI and response ACK;
According to the modulation system preset, carry out modulation treatment to described CQI, obtain CQI symbol sebolic addressing, carry out QPSK modulation treatment to described RI and described ACK, obtain RI symbol sebolic addressing and ACK symbol sebolic addressing, described modulation system comprises QPSK, 16QAM or 64QAM.
6. method according to claim 5, is characterized in that, describedly carries out symbol level process to the code block group after described modulation, comprising:
Code block group after described modulation is cascaded up, obtains data symbol sequence;
Described CQI symbol sebolic addressing is placed on the beginning location of described data symbol sequence; RI symbol sebolic addressing and ACK symbol sebolic addressing are placed on the predeterminated position in described data symbol sequence, and delete the data symbol of described predeterminated position, obtain the data symbol sequence of access control signal;
The data symbol sequence of described access control signal is interweaved, obtains the upward signal after encoding.
7. a terminal, is characterized in that, described terminal comprises:
Bit-level processing unit, for carrying out bit-level process to transmission block, obtains code block group;
Scrambling processing unit, for carrying out scrambling process to described code block group, obtains the code block group after scrambling;
Modulation treatment unit, carries out modulation treatment to the code block group after described scrambling, obtains the code block group after modulating;
Symbol level processing unit, for carrying out symbol level process to the code block group after described modulation, obtains upward signal.
8. terminal according to claim 7, is characterized in that, described bit-level processing unit, specifically for:
Transport block cyclic redundancy check CRC coding is carried out to transmission block, and transmission block bit and CRC coded-bit are coupled together carries out the process of bit-level code block comminute, obtain code block;
Code block CRC coding, chnnel coding, rate-matched process are carried out to each code block, obtains code block group.
9. terminal according to claim 7, is characterized in that, described scrambling processing unit, specifically for:
According to the scrambler subsequence group preset, carry out scrambling process to each code block in described code block group, described scrambler subsequence group is that the intertexture scrambler sequence that segmentation is preset obtains, and corresponding with described code block group.
10. terminal according to claim 7, is characterized in that, described modulation treatment unit, specifically for:
According to the modulation system preset, carry out modulation treatment to the code block group after described scrambling, described modulation system comprises QPSK, 16QAM or 64QAM.
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