CN103312437B - TD SCDMA little business interpretation method and device - Google Patents
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Abstract
The present invention provides a kind of TD SCDMA little business interpretation method and device, and wherein method includes: code translator obtains the key parameter of the new subscriber equipment accessed and whole CTFC from RNC；Every kind of decoding synopsis corresponding for described CTFC is built according to described key parameter；After described code translator receives the radio frames relevant to described subscriber equipment on the physical channel, according to described decoding synopsis, described radio frames is mated for the Frame on transmission channel.The present invention decodes by the way of employing is tabled look-up, and instead of the multiple decoding treatment process in existing protocol, thus improves decoding efficiency.
Description
Technical field
The present invention relates to a kind of TD SDMA (Time Division-Synchronous Code
Division Multiple Access, is called for short: TD-SCDMA) little business interpretation method and device, belongs to TD-SCDMA technology
Field.
Background technology
Decoding process in TD-SCDMA business refers to the radio frames received on physical channel be decoded as and transmit letter
The Frame that road matches, wherein, physical channel refers to the wireless channel of physical layer, and transmission channel refers to the data letter of transport layer
Road, described transport layer is positioned at the upper strata of described physical layer in logic function.
According to the regulation of existing protocol, the decoding process of existing TD-SCDMA business specifically include that solution physical channel map,
Solve second time to interweave, solve bit scrambler, solve the processing procedures such as rate-matched.But, for business little for some TD-SCDMA,
These processing procedures are the most complicated, compared with the data volume of little business, complete to process the time needed relatively long, therefore, translate
Code efficiency is relatively low.
Summary of the invention
The present invention provides a kind of TD-SCDMA little business interpretation method and device, in order to improve for the little business of TD-SCDMA
Decoding efficiency.
One aspect of the present invention provides a kind of TD-SCDMA little business interpretation method, including:
Code translator obtains the key parameter of the new subscriber equipment accessed and whole CTFC from RNC；
According to described key parameter, the mapping relations of the input data of multiple decoding processes with output data are configured to often
Plant corresponding for a described CTFC decoding synopsis；
After described code translator receives the radio frames relevant to described subscriber equipment on the physical channel, translate according to described
Described radio frames coupling is the Frame on transmission channel by code synopsis.
Another aspect of the present invention provides a kind of TD-SCDMA little business code translator, including:
Acquisition module, for obtaining the key parameter of the new subscriber equipment accessed and whole CTFC from RNC；
Build module, for according to described key parameter, by the input data of multiple decoding processes with export reflecting of data
The relation of penetrating is configured to every kind of corresponding for described CTFC decoding synopsis；
Matching module, for after receiving the radio frames relevant to described subscriber equipment on the physical channel, according to institute
Stating decoding synopsis by described radio frames coupling is the Frame on transmission channel.
The present invention is by being configured to every kind of CTFC by the mapping relations of the input data of multiple decoding processes with output data
A corresponding decoding synopsis, and then use the mode tabled look-up to decode, instead of at the multiple decodings in existing protocol
Reason process, thus improve decoding efficiency.
Accompanying drawing explanation
Fig. 1 is the flow chart of TD-SCDMA of the present invention little business interpretation method embodiment；
Fig. 2 is the particular flow sheet of step 120 in method shown in Fig. 1；
Fig. 3 is the particular flow sheet of step 130 in method shown in Fig. 1；
Fig. 4 is the structural representation of TD-SCDMA of the present invention little business code translator embodiment；
Fig. 5 is the structural representation building module 20 shown in Fig. 4；
Fig. 6 is the structural representation of matching module 30 shown in Fig. 4.
Detailed description of the invention
Fig. 1 is the flow chart of TD-SCDMA of the present invention little business interpretation method embodiment, as it can be seen, include as follows
Step:
Step 110, code translator obtains the key parameter of the new subscriber equipment accessed and whole CTFC from RNC.
Wherein, CTFC refers to transformat combination value of calculation (Calculated Transport Format
Combination), it is used for identifying this subscriber equipment and uses the format combination of which kind of transmission channel.One subscriber equipment is not for
Same transmission demand can have multiple CTFC.For example, it is assumed that subscriber equipment to carry out multiplexing, transmission letter to two transmission channels
The optional form of road A is A1, A2 and A3, and the optional form of transmission channel B is B1 and B2, has been pre-configured with three kinds for subscriber equipment
CTFC, the first CTFC are A1+B1, the second CTFC is A1+B2, the third CTFC is A2+B2.
Wherein, described key parameter such as includes: the number of transmission channel, the TFS Transport Format Set of each transmission channel
(Transport Format Set, be called for short: TFS), Puncturing Limit, secondary intertexture pattern, number of time slots, Resource Unit (RU) individual
Number, time slot format.Wherein, TFS includes: transport block size, transmission block number, Transmission Time Interval (Transmission
Time Interval, is called for short: TTI), (Cyclic Redundancy Check is called for short: CRC) parameter, volume cyclic redundancy check (CRC)
The code parameter such as mode and parameters of rate matching；Described secondary intertexture pattern includes: time slot interleaving pattern and frame intertexture pattern.
Wherein, described code translator can be installed in base station or subscriber equipment, when RNC has learnt that subscriber equipment accesses base
When standing, above-mentioned key parameter and CTFC can be transferred to code translator.
Step 120, according to described key parameter, by the mapping relations of the input data of multiple decoding processes with output data
It is configured to every kind of corresponding for described CTFC decoding synopsis.
Wherein, described decoding synopsis is made up of multiple decoding comparison sublists, and each described decoding comparison sublist is with a kind of
Radio frames is corresponding, and radio frames is the frame that subscriber equipment sends in wireless physical channel, owing to the maximum of TTI is usually 80
Millisecond, and the persistent period of a kind of radio frames is usually 10 milliseconds, therefore, described decoding synopsis at most can include eight and translate
Code comparison sublist.If user configured key parameter is identical, then the decoding synopsis obtained also is identical.
The concrete process building decoding synopsis will be introduced in subsequent content.
Step 130, after described code translator receives the radio frames relevant to described subscriber equipment on the physical channel,
According to described decoding synopsis, described radio frames is mated for the Frame on transmission channel.
Specifically, when this code translator is positioned in base station, the above-mentioned radio frames relevant to subscriber equipment refers to by user
Equipment is sent to the radio frames of base station through physical channel；When this code translator is positioned in subscriber equipment, above-mentioned and subscriber equipment
Relevant radio frames refers to be sent to through physical channel the radio frames of subscriber equipment by base station.
As in figure 2 it is shown, above-mentioned steps 120 specifically may include steps of:
Step 121, according to the number of time slots in described key parameter, RU number and time slot format, calculates and solves physical channel
First input data of mapping process and the first mapping relations of the first output data.
Specifically, can calculate described according to the physical channel mapping algorithm of regulation in No. 25.222 agreements of 3GPP TS
First mapping relations.
Step 122, according to the secondary intertexture pattern in the described first number of bits exporting data and described key parameter
Calculate the second mapping relations of the second input data and the second output data solving second time interleaving process.
Specifically, can calculate described according to the physical channel mapping algorithm of regulation in No. 25.222 agreements of 3GPP TS
Second mapping relations.
Step 123, calculates the 3rd input number solving bit scrambler process according to the number of bits of described second output data
According to the 3rd mapping relations with the 3rd output data.
Specifically, can calculate described according to the physical channel mapping algorithm of regulation in No. 25.222 agreements of 3GPP TS
3rd mapping relations.
Step 124, according to the number of the transmission channel in described key parameter, TFS, Puncturing Limit, number of time slots, RU
Number and time slot format calculate the 4th mapping relations of the 4th input data and the 4th output data solving rate matching procedure.
Specifically, can calculate described according to the physical channel mapping algorithm of regulation in No. 25.222 agreements of 3GPP TS
4th mapping relations.
Step 125, using described first output data as described second input data, will described second export data as
Described 3rd input data, will described 3rd output data as described 4th input data, according to described first mapping relations,
Second mapping relations, the 3rd mapping relations and the 4th mapping relations coupling obtain described first input data and described 4th output
The mapping relations of data form described decoding synopsis.
Wherein, solve physical channel mapping, solution second time interweaves, solve bit scrambler and solution this Four processes of rate-matched is
The Four processes being successively sequentially completed, therefore, the output data of previous process are the input data of later process.Example
As, it is assumed that the first mapping relations are: A correspondence B；Second mapping relations are: B correspondence C；3rd mapping relations are: C correspondence D；4th
Mapping relations are: D correspondence E.Therefore, it can obtain the corresponding relation of A Yu E.
As it is shown on figure 3, above-mentioned steps 130 specifically may include steps of:
Step 131, the TFCI used according to described radio frames searches and decodes synopsis accordingly.
Owing to described decoding synopsis is corresponding with CTFC, and transport format combination identifiers (Transport Format
Combination Indicator, is called for short: TFCI) the most also have certain corresponding relation with CTFC, specifically will be
Subsequent content remarks additionally.
Step 132, selects from described decoding synopsis according to the relative radio frame number of the RU data in described radio frames
Corresponding decoding comparison sublist.
Wherein, (Resource Unit is called for short: the needs during RU) data are described radio frames are carried out described Resource Unit
The master data unit of decoding, each RU data are respectively provided with a relative radio frame number, show the radio frames that these RU data are corresponding
Relative position in a TTI, just can choose corresponding decoding comparison sublist by this relative radio frame number.Such as,
As it was previously stated, a TTI comprises eight radio frames, if the relative radio frame number of RU data is 5, then show this RU number
According to the 5th radio frames being positioned in described TTI.
Step 133, mates described radio frames for the Frame on transmission channel according to described decoding comparison sublist.
It is assumed that certain radio frames accordingly decode comparison sublist as shown in table 1:
Table 1
| Bit is numbered | Before decoding | After decoding |
| 1 | C | A |
| 2 | D | B |
| 3 | D | C |
| 4 | A | D |
| 5 | B |
From table 1 it follows that decoding anteposition will transform to the 3rd bit after decoding in the data " C " of the first bit
Position；Decoding anteposition will transform to the position of the 4th bit after decoding in the data " D " of the second bit and the 3rd bit；Decoding
Anteposition will transform to the position of the first bit after decoding in the data " A " of the 4th bit；Decoding anteposition is in the number of the 5th bit
The position of the second bit will be transformed to after decoding according to " B ".
It is right i.e. can to realize by referring to the transformation relation of the bit position before decoding and after decoding of the data shown in table 1
The decoding of RU data, obtains the Frame matched with transmission channel, thus realizes decoding.Multiple when there being multiple transmission channel to carry out
Used time, owing to considering to understand rate matching procedure when building decoding synopsis, therefore, the Frame obtained after decoding can divide
Not based in the speed rates matched with each transmission channel to each transmission channel.
Hereinafter the corresponding relation of CTFC and TFCI is briefly described:
In order to utilize radio channel resource efficiently, WCDMA (Wide band Code Division
Multiple Access, is called for short: WCDMA) and introduce transmission channel multiplexing mechanism in TD-SCDMA mobile communication system, i.e.
Multiple transmission channels are multiplexed into a yard composite transport channel (Code Composite Transport Channel, be called for short:
CCTrCH), the most again CCTrCH is mapped to physical channel, thus, it is to avoid single transmission channel is because speed is low the most necessary
The wasting of resources that at least one physical channel of distribution is caused.
Participate in the transformat (Transport Format) of each transmission channel of a CCTrCH multiplexing (hereinafter referred to as
TF) it is that the physical layer signaling by TFCI notifies recipient's.Due to the time variation of TF, TFCI is also time-varying (every 10ms
Change once).
But, TFCI the most directly indicates the transformat of each transmission channel, and it is only recipient and obtains each TrCH
Transformat necessary index information is provided.The purpose of do so is to improve air information efficiency of transmission as far as possible.Connect
After debit obtains TFCI, by the numerical value obtaining CTFC of tabling look-up, then according to certain algorithm, resolve this CTFC and obtain each
The TFI of TrCH, is tabled look-up by TFI and can obtain the transformat TF of correspondence.Therefore, corresponding decoding can also be found by TFCI
Synopsis.
Method described in the present embodiment is by building the mapping relations of the input data of multiple decoding processes with output data
Decode synopsis for every kind of corresponding for CTFC one, and then use the mode tabled look-up to decode, instead of in existing protocol
Multiple decoding treatment process, thus improve decoding efficiency；And owing to the data volume of the little business of TD-SCDMA is less, therefore translate
The size of code synopsis is maintained at attainable scope, will not produce the most too much operand.
Fig. 4 is the structural representation of TD-SCDMA of the present invention little business code translator embodiment, above-mentioned in order to realize
Method.This TD-SCDMA little business code translator may be located in base station and/or subscriber equipment.As it can be seen, this device is at least
Including: acquisition module 10, structure module 20 and matching module 30, its operation principle is as follows:
Acquisition module 10 obtains the key parameter of the new subscriber equipment accessed and whole CTFC from RNC, wherein about CTFC
With illustrating of key parameter, can be found in said method embodiment, here is omitted.Then, by building module 20 basis
The mapping relations of the input data of multiple decoding processes with output data are configured to every kind described CTFC pair by described key parameter
The decoding synopsis answered.
Specifically, as it is shown in figure 5, this structure module 20 first passes through computing unit 21 according to the time slot in described key parameter
Number, RU number and time slot format, calculate the first input data solving physical channel mapping process and the of the first output data
One mapping relations；According to the secondary intertexture mode computation solution in the described first number of bits exporting data and described key parameter
The second input data and second of interleaving process export the second mapping relations of data for the second time；According to described second output data
Number of bits calculate solve bit scrambler process the 3rd input data with the 3rd output data the 3rd mapping relations；According to institute
State the number of transmission channel in key parameter, TFS, Puncturing Limit, number of time slots, RU number and time slot format and calculate solution speed
4th input data of matching process and the 4th mapping relations of the 4th output data；The most again by matching unit 22 by described
One output data are as described second input data, using described second output data as described 3rd input data, by described
3rd output data, as described 4th input data, are closed according to described first mapping relations, the second mapping relations, the 3rd mapping
System and the 4th mapping relations coupling obtain described first input data and are formed described with the described 4th mapping relations exporting data
Decoding synopsis.
Hereafter, ought receive relevant to described subscriber equipment on the physical channel when this TD-SCDMA little business code translator
Radio frames after, by matching module 30 according to described decoding synopsis by described radio frames coupling be the data on transmission channel
Frame.
Specifically, as shown in Figure 6, matching module 30 first passes through and searches the TFCI that uses according to described radio frames of unit 31 and look into
Look for and decode synopsis accordingly；Then by select unit 32 according to the relative radio frame number of the RU data in described radio frames from
Search and the decoding synopsis that unit 31 finds selects corresponding decoding comparison sublist；Finally by decoding unit 33 according to selection
Described radio frames coupling is the Frame on transmission channel by the described decoding comparison sublist that unit 32 is selected.
Device described in the present embodiment is by building the mapping relations of the input data of multiple decoding processes with output data
Decode synopsis for every kind of corresponding for CTFC one, and then use the mode tabled look-up to decode, instead of in existing protocol
Multiple decoding treatment process, thus improve decoding efficiency；And owing to the data volume of the little business of TD-SCDMA is less, therefore translate
The size of code synopsis is maintained at attainable scope, will not produce the most too much operand.
Hereinafter, seeing table 2, with AMR, (Adaptive Multi-Rate is called for short: AMR) speech business is
Example, the cpu resource occupancy of two kinds of decoded modes of comparative descriptions:
Table 2
From the data shown in table 2 it can be seen that use the decoded mode decoding efficiency than traditional decoded mode of the present invention
Improve 16.9 times.
Herein it should be noted that although only for solving, physical channel maps, solution second time interweaves, solves bit in the present invention
Scrambler, solution this Four processes of rate-matched construct decoding synopsis, but this is not intended that the decoding in TD-SCDMA business
Journey only includes this Four processes, it practice, can also include after completing above-mentioned solution rate matching procedure hardware decoding etc. its
His process, only because methods and apparatus of the present invention can not to build decoding for the process in addition to aforementioned four process right
According to table, the most do not do too much explanation.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can be passed through
The hardware that programmed instruction is relevant completes, and aforesaid program can be stored in a computer read/write memory medium, this program
Upon execution, perform to include the step of said method embodiment；And aforesaid storage medium includes: ROM, RAM, magnetic disc or light
The various medium that can store program code such as dish.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although
With reference to previous embodiment, the present invention is described in detail, it will be understood by those within the art that: it still may be used
So that the technical scheme described in foregoing embodiments to be modified, or wherein portion of techniques feature is carried out equivalent；
And these amendment or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (3)
1. a TD-SCDMA little business interpretation method, it is characterised in that including:
Code translator obtains the key parameter of the new subscriber equipment accessed and whole CTFC from RNC；
According to described key parameter, the mapping relations of the input data of multiple decoding processes with output data are configured to every kind of institute
State corresponding for CTFC a decoding synopsis；
Wherein, described decoding synopsis is made up of multiple decoding comparison sublists, and each described decoding comparison sublist is wireless with one
Frame is corresponding；
After described code translator receives the radio frames relevant to described subscriber equipment on the physical channel, right according to described decoding
According to table, described radio frames is mated for the Frame on transmission channel；
Described structure described decoding synopsis includes:
According to the number of time slots in described key parameter, RU number and time slot format, calculate and solve the of physical channel mapping process
One input data and the first the first mapping relations exporting data；
According to the secondary intertexture mode computation solution second time in the described first number of bits exporting data and described key parameter
Second input data of interleaving process and the second mapping relations of the second output data；
Number of bits according to described second output data calculates the 3rd input data and the 3rd output solving bit scrambler process
3rd mapping relations of data；
Number, TFS, Puncturing Limit, number of time slots, RU number and time slot format according to the transmission channel in described key parameter
Calculate the 4th mapping relations of the 4th input data and the 4th output data solving rate matching procedure；
Using described first output data as described second input data, using described second output data as described 3rd input
Data, using described 3rd output data as described 4th input data, close according to described first mapping relations, the second mapping
System, the 3rd mapping relations and the 4th mapping relations coupling obtain the mapping of described first input data and described 4th output data
Relation forms described decoding synopsis；
Wherein, described described radio frames coupling according to described decoding synopsis, includes for the Frame on transmission channel:
The TFCI used according to described radio frames searches and decodes synopsis accordingly；
Relative radio frame number according to the RU data in described radio frames selects corresponding decoding right from described decoding synopsis
According to sublist；
According to described decoding comparison sublist, described radio frames is mated for the Frame on transmission channel.
2. a TD-SCDMA little business code translator, it is characterised in that including:
Acquisition module, for obtaining the key parameter of the new subscriber equipment accessed and whole CTFC from RNC；
Build module, for according to described key parameter, the mapping of the input data of multiple decoding processes with output data being closed
System is configured to every kind of corresponding for described CTFC decoding synopsis；
Wherein, described decoding synopsis is made up of multiple decoding comparison sublists, and each described decoding comparison sublist is wireless with one
Frame is corresponding；
Matching module, for after receiving the radio frames relevant to described subscriber equipment on the physical channel, translates according to described
Described radio frames coupling is the Frame on transmission channel by code synopsis；
Described structure module includes:
Computing unit, for according to the number of time slots in described key parameter, RU number and time slot format, calculates and solves physical channel
First input data of mapping process and the first mapping relations of the first output data；Bit according to described first output data
Second input data of the secondary intertexture mode computation solution second time interleaving process in number and described key parameter are defeated with second
Go out the second mapping relations of data；The 3rd of number of bits calculating solution bit scrambler process according to described second output data is defeated
Enter the 3rd mapping relations of data and the 3rd output data；Number, TFS according to the transmission channel in described key parameter, beat
The hole limit, number of time slots, RU number and time slot format calculate the 4th input data solving rate matching procedure and the 4th output number
According to the 4th mapping relations；
Described second output data, for described first output data are inputted data as described second, are made by matching unit
For described 3rd input data, using described 3rd output data as described 4th input data, map according to described first and close
System, the second mapping relations, the 3rd mapping relations and the 4th mapping relations coupling obtain described first input data and the described 4th
The mapping relations of output data form described decoding synopsis；
Wherein, described matching module includes:
Searching unit, the TFCI for using according to described radio frames searches and decodes synopsis accordingly；
Select unit, for the relative radio frame number according to the RU data in described radio frames from searching the decoding that unit finds
Synopsis selects corresponding decoding comparison sublist；
Decoding unit, for mating described radio frames for transmission channel according to the described decoding comparison sublist selecting unit to select
On Frame.
Device the most according to claim 2, it is characterised in that described TD-SCDMA little business code translator is positioned at base station
And/or be positioned in described subscriber equipment.
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| US7203165B1 (en) * | 1999-03-06 | 2007-04-10 | Robert Bosch Gmbh | Data transmission device and method |
| CN101252371A (en) * | 2008-04-14 | 2008-08-27 | 北京天碁科技有限公司 | Decoding method of high speed sharing control channel |
| CN101489256A (en) * | 2009-03-03 | 2009-07-22 | 北京天碁科技有限公司 | Method for receiving data by TD-SCDMA terminal |
| CN101908943A (en) * | 2009-06-02 | 2010-12-08 | 京信通信系统（中国）有限公司 | Channel decoding method applied to time division-synchronization code division multiple access (TD-SCDMA) |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7203165B1 (en) * | 1999-03-06 | 2007-04-10 | Robert Bosch Gmbh | Data transmission device and method |
| CN101252371A (en) * | 2008-04-14 | 2008-08-27 | 北京天碁科技有限公司 | Decoding method of high speed sharing control channel |
| CN101489256A (en) * | 2009-03-03 | 2009-07-22 | 北京天碁科技有限公司 | Method for receiving data by TD-SCDMA terminal |
| CN101908943A (en) * | 2009-06-02 | 2010-12-08 | 京信通信系统（中国）有限公司 | Channel decoding method applied to time division-synchronization code division multiple access (TD-SCDMA) |
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Granted publication date: 20161228 |