CN102640470A - Data sending and receiving method, apparatus and system being applied in orthogonal frequency division multiple access system - Google Patents
Data sending and receiving method, apparatus and system being applied in orthogonal frequency division multiple access system Download PDFInfo
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Abstract
The embodiment of the invention provides a data sending and receiving method, an apparatus and a system being applied in an orthogonal frequency division multiple access system. The sending method includes the following steps: according to the way of bearing code, the data of corresponding length in one code is collected to put on a resource block PRB; the data is sent by taking PRB as a unit. The embodiment of the invention also defines multiple ways of PRB bearing FEC code. The ways of PRB bearing FEC code are configurable, which solves the problems of low data transmission efficiency in existing OFDM system and user experience, and then improves the data transmission efficiency and user satisfaction.
Description
Technical field
The present invention relates to communication technical field, specifically, relate to a kind of data method of sending and receiving, Apparatus and system that is applied in the orthogonal frequency division multiple access system.
Background technology
OFDM (OFDMA, Orthogonal Frequency Division Multiple Access) is divided into transmission bandwidth a series of sub-carrier set of the non-overlapping copies of quadrature, the different subcarriers collection is distributed to different users realize multiple access.The OFDMA scheme can be regarded as total resources (time, bandwidth) are cut apart on time, frequency, realizes that the multi-user inserts.At the wireless communication system of present point-to-multipoint (like WIMAX (Worldwide Interoperability for Microwave Access; Be that worldwide interoperability for microwave inserts) and LTE (Long Term Evolution; Long Term Evolution) system), adopted the OFDMA technology.The OFDMA technology can be applicable to the point-to-multipoint system of EOC (Ethernet over Cable, i.e. coaxial cable Ethernet) too.
In the point-to-multipoint system of OFDMA; Local side is responsible for distributing the time-frequency piece resource of each user at up-downlink direction, informs the time-frequency block message of its up-downgoing of user through fields specific (like up mapping (UL-MAP) and descending mapping (DL-MAP) message MAP message) in each downlink frame.At down direction, the user receives and extracts data according to the information of MAP indication at the time-frequency piece under own; At up direction, the user sends data according to the information of MAP indication at the time-frequency piece under own.
Existing OFDMA system forms time slot (Slot) or Physical Resource Block (Physical Resource Block, hereinafter referred PRB) with uplink and downlink time-frequency domain physical resource, carries out the scheduling and the distribution of data as unit.When transfer of data, need the data based said time slot of transmission or the length of Physical Resource Block to encode, form code word one by one, the code word behind the coding is sent to opposite equip. receive.This technology of carrying out transfer of data through time slot or Physical Resource Block; The code word size of its support becomes the multiple relation with time slot or PRB size; Be the restriction that numeral length receives PRB or time slot self length, and the length of said PRB or time slot is fixing, and then makes that the code length of existing OFDMA system transmissions is limited; And then efficient is low when causing transfer of data, poor user experience.For example: active user's data traffic is less, still adopts the code word of fixing code length to go coding and then transmission, then can have wait time delay for piecing together code word, causes the time delay of real time business, and then efficient is low when making transfer of data, poor user experience.
Summary of the invention
The purpose of this invention is to provide a kind of data transmission method for uplink, Apparatus and system that is applied in the orthogonal frequency division multiple access system; The code length that is used for solving prior art OFDMA system transmissions is limited; And then efficient is low when causing transfer of data; The problem of poor user experience, and then improved data transmission efficiency and user's satisfaction.
Be to realize above-mentioned purpose, the present invention provides the data transmission method for uplink of a kind of OFDMA of employing system in first aspect.This method comprises the following steps: that according to the code word bearing mode data of extracting respective length in the code word are placed on the Resource Block PRB; With PRB is that unit carries out the data transmission.
In second aspect, the present invention provides the data receive method of a kind of OFDMA of employing system.This method comprises the following steps: to receive the PRB data; According to the code word bearing mode, from PRB, extract the data after encoding; Data to behind the coding are decoded.
In the third aspect, the present invention provides the data transmitting equipment of a kind of OFDMA of comprising system.This data transmitting equipment comprises: extraction unit, and according to the code word bearing mode, data are placed on the PRB behind the coding of extraction respective length; Transmitting element is that unit carries out the data transmission with PRB.
In fourth aspect, the present invention provides the data receiver of a kind of OFDMA of comprising system.This data receiver comprises: the receiving element that receives the PRB data; According to the code word bearing mode, from PRB, extract the extraction unit of the data after encoding; To the data decoding unit of decoding behind the coding.
Aspect the 5th, the present invention provides the communication system of a kind of OFDMA of comprising system, comprises described data transmitting equipment of the third aspect and the described data receiver of fourth aspect.
The present invention has defined the mode that multiple PRB carries the FEC code word.The mode that these PRB carry the FEC code word is configurable, and the data transmission efficiency that has solved existing ofdm system is low, the problem of user experience; And then improve data transmission efficiency and user satisfaction, further, when the data volume that connects when certain bar is big; Can select long code word; Long code word can also be brought the gain improvement of FEC, in data volume hour, can carry the configuration item of a short code word through PRB; When weak point wraps more and low delay requirement, still can improve data transmission efficiency through this mode of selection of configuration.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below.
Fig. 1 is the sketch map that carries the mode of code word according to the PRB of the embodiment of the invention 1;
Fig. 2 is transmit leg carries code word based on PRB a process chart;
Fig. 3 is the recipient is carried code word based on PRB a process chart;
Fig. 4 is the sketch map according to the embodiment of the invention 3;
Fig. 5 is the data transmitting equipment according to the embodiment of the invention;
Fig. 6 is the data receiver according to the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention will be carried out clear, intactly description.Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Embodiment 1
The embodiment of the invention provides a kind of data transmission method for uplink that is applied in the orthogonal frequency division multiple access system:
Comprise the following steps: that said data transmission method for uplink comprises: according to the code word bearing mode, the data of extracting respective length in the code word are placed on the Physical Resource Block; With said Physical Resource Block is that unit carries out the data transmission.
Said method also comprises: adopt the one or more identifier indication code word bearing modes in bearing mode identifier, code word size identifier, the afterbody processing mode identifier.
Further, wherein according to the code word bearing mode, the step that data are placed on the PRB behind the coding of extraction respective length specifically comprises: the code word bearing mode is meant that a plurality of PRB carry a code word; Second code word is placed on the PRB that is placed with first code word.
Further, said method also comprises: select the identical PRB of bit bearing capacity to carry same
The step of code word.
Further, said code word bearing mode can also carry a code word for through changing the size of said Physical Resource Block.
Correspondingly, the embodiment of the invention also provides a kind of data receive method that is applied in the orthogonal frequency division multiple access system: receive Physical Resource Block; According to the code word bearing mode, from said Physical Resource Block, extract the data after encoding; Data to behind the coding are decoded.
Further, the step of the data behind the extraction coding comprises from PRB: said code word bearing mode is that a plurality of Physical Resource Block carry code words; Extract the data of two code words from a PRB.
Through Fig. 1 the mode of the PRB carrying code word of the embodiment of the invention 1 is specifically described below.In the OFDMA system, common 12 groups of adjacent sub-carriers are classified by the unit time slot, form Physical Resource Block (PRB).PRB is the minimum bandwidth unit that base station dispatcher distributes.According to present embodiment, can adopt a plurality of PRB cascades to carry single code word.Code word for example is FEC (Forward Error Correction, a forward error correction) code word.
In the drawings, the left side has illustrated PRB to carry first kind of mode of code word, 5 PRB is wherein arranged, PRB1-PRB5.Code word 1 is carried on the preceding part of PRB1, PRB2 and PRB3.Code word 2 is carried on a back part, PRB4 and the PRB5 of PRB3.In first kind of mode, support to exist among the PRB two code word cross-over connections.
The right side has illustrated PRB to carry the second way of code word.Under the second way, 6 PRB are arranged, PRB1-PRB6.Code word 1 is carried on the preceding part of PRB1, PRB2 and PRB3, and code word 2 is carried on PRB4, PRB5 and PRB6.According to the second way, do not support to exist among the PRB two code words.If code word 1 does not take PRB3, then the afterbody of PRB3 does not use yet.
In the OFDMA system, suppose PRB size=N number of sub-carrier * M symbol.Suppose that each every carriers carry bit power k that need support is 1～12 bit, then the carrying bit power of each PRB is k * N * M.With N=12, M=15, k=12 are example, and it is 2160 bits (i.e. 270 bytes) that the maximum of a PRB is carried bit power.According to routine, a code word is exceeded with a PRB, and then the length of code word is 270 bytes to the maximum.In the present embodiment, the length of code word then can break through the restriction of PRB size, makes that the user can be according to service needed, and flexible configuration is used long code word or short code word.When code word was elongated, the gain of physical layer also can significantly promote.When code word shortens, can improve delay character.
Transmit leg need be informed the recipient with the code word bearing mode that data adopted on the PRB of current transmission.The mode of informing has two kinds: 1. transmit in advance; 2.PRB carry.
In the system of OFDMA, in general, the recipient has been known the modulation bit number of this PRB in advance before receiving the PRB data.Therefore, receiving-transmitting sides can confirmed the modulation system of this PRB and the code word bearing mode that possibly select through interaction protocol in advance.As in the system of point-to-multipoint, after being responsible for consulting by local side, inform the terminal to the code word bearing mode of the employing of each PRB of up-downlink direction by local side is unified with the terminal.
Also can take the part resource in each PRB piece inside and come indication in real time (transmitting these parameters) as using the parton carrier wave.In this case, local side only need inform that the PRB of terminal distribution numbers, and the code word bearing mode that PRB adopts can confirmed in real time and indicate and give the recipient according to service needed by transmit leg (local side or terminal).
To above-mentioned two kinds of transfer modes, all need increase some identifiers to each PRB and indicate.Hereinafter is some examples of identifier, and the present invention is not limited only to adopt these examples.
1. bearing mode identifier.The mode of the carrying FEC code word of the current PRB of bearing mode identifier marking.This identifier can be a bit Flag.During Flag=0, represent that current PRB is independent code word; During Flag=1, represent that current PRB is that long code word is carried in cascade.
2. code word type identifier.The code word type identifier is indicated the whole length of current PRB institute's code word carried.This identifier can be FEC code word type indication FEC_Code_Type.Be also referred to as the code word size identifier.
To Flag=0 promptly PRB carry the situation of a code word, the recipient also can not need discern FEC_Code_Type, but the modulation bit number of this PRB of having known according to (or other modes) is in advance extrapolated the FEC code word type (length) that this PRB adopts.
During to Flag=1, promptly current PRB is that long code word is carried in cascade, and the recipient need be known institute's code word carried length according to FEC_Code_Type.
3. afterbody processing mode identifier.This identifier indicates whether to support a PRB to have a plurality of code words.Receiving terminal according to this sign can know current code word extract after this PRB rest parts subcarrier whether the data of next code word are arranged.This identifier can adopt bit Cont_flag.
If the Cont_flag=1 of current PRB piece; And current PRB piece is the ending of a last code word; When having two code word cross-over connections, also need an extra FEC_Code_Type, the recipient can be known next institute code word carried length according to FEC_Code_Type.
Therefore, in this embodiment, user of system's support connects can use a plurality of code word bearing modes, and promptly this user connects the PRB that is assigned with use, possibly include single PRB corresponding code word bearing mode and a plurality of PRB code word carried bearing mode.
Fig. 2 is transmit leg carries code word based on PRB a process chart.
As shown in Figure 2, at step S22, consult to confirm carried of the bit number of PRB by receiving-transmitting sides.
At step S24, confirm to be used to send the code word bearing mode that each PRB adopted of data according to practical business and flow.Can adopt single PRB to carry independent code word mode during like low discharge.
At step S26, coding and data processing.Specifically, each PRB according to the bearing mode (flag), code word type (FEC_Code_Type), afterbody processing mode (Cont_flag) information that adopt, is handled the needs data carried by data.According to the code word bearing mode data payload is carried out the FEC coding, get the data bit of respective numbers and encode.To the data behind the coding, do different disposal according to bearing mode and afterbody processing mode: single PRB is carried independent code word mode, and the data after directly will encoding are placed on the PRB; The type of long code words is carried in a plurality of PRB cascades, extract the coding of respective length according to the carrying bit number of this PRB after data be placed on this PRB.
At step S28, be that unit carries out the data transmission with PRB.
Bearing mode (flag), code word type (FEC_Code_Type), afterbody processing mode information such as (Cont_flag) that transmit leg adopts each PRB; Can when setting up professional the connection, prior both sides confirm, also can come indication in real time through take the part resource in each PRB piece inside through interacting message.
Fig. 3 is the recipient is carried code word based on PRB a process chart.
As shown in Figure 3, at step S32, consult to confirm carried of the bit number of PRB by receiving-transmitting sides.
At step S34, receiving terminal receives the PRB data.Obtain this PRB carrying code word mode through detecting the inner specific resources of each PRB piece.Perhaps, prior both sides confirm the code word bearing mode through interacting message in the time of also can connecting according to the business of foundation.
At step S36, judge whether single PRB bearing mode.If then turn to step S374.If not, then turn to step S372.
At step S372, the type of long code words is carried in a plurality of PRB cascades, carry out data extract according to code word type (FEC_Code_Type), afterbody processing mode (Cont_flag) information, deliver to the next stage decoder module again after collecting out a complete code.At step S374, single PRB is carried independent code word mode, the data that directly extract on this PRB are given the next stage decoder module.
At step S38, according to the code word bearing mode data are carried out fec decoder, recover the preceding initial data of coding.
Embodiment 2
In an alternative embodiment of the invention, promptly among the embodiment 2, define possible PRB and carry the code word mode.With embodiment 1, the multiple code word bearing mode of embodiment 2 definition comprises code word bearing mode and a plurality of PRB code word carried bearing mode that single PRB is corresponding.But, in embodiment 2, limit the PRB resource that each user connects distribution, can only use a kind of bearing mode, promptly single PRB carries the mode of a single code word or a code word of a plurality of PRB carrying.
Receiving-transmitting sides can be appointed employed PRB bearing mode when connecting.In an example, CO (Central Office, local side) end decision PRB bearing mode.Such as, the CO end can be according to this user's bandwidth demand, the code word bearing mode that decision is selected.When big, can select long code word like bandwidth demand, promptly a plurality of PRB carry the type of a code word, and LLC (Logical Link Control, logic link control) layer header overhead also can reduce like this, and the coding gain of physical layer also can improve.In another example, determine the PRB bearing mode according to self-demand by user side.
Each connection is all needed following sign:
The PRB bearing mode that the recipient is good according to a preconcerted arrangement receives the PRB data and extracts code word.Single PRB is carried the mode of single code word, and each PRB data is exactly an independent code word.A plurality of PRB are carried the mode of single code word, need carry out data extract according to code word type (FEC_Code_Type), afterbody processing mode (Cont_flag) information.
Embodiment 3
Fig. 4 is the sketch map according to the embodiment of the invention 3.In embodiment 3, definition can support a PRB to carry the mode of a code word or a code word of a plurality of PRB carrying simultaneously in system.The CO end can select to carry the code word mode according to the user's bandwidth demand.The user big to the bandwidth demand amount selects the long code word bearing mode as far as possible.When distributing the PRB resource, certain is needed the user of long code word, MAC can combine the PRB of n bit bearing capacity identical (for example, SNR is approaching) and carry single code word when Resources allocation.Such as, to this user's SNR PRB is sorted, the PRB of n identical SNR grade is combined into a PRB carries long code word.
As shown in Figure 4, the user is distributed 12 PRB, PRB1-12.Sort all PRB by the size of SNR, SNR PRB approaching or that equate can bundle and carry long code word.
The code word size of the long code word that a plurality of PRB combinations are carried equals A * PRB and can carry bit number.A representes the binding PRB number that system need support.Running time-frequency resource lattice number=M number of sub-carrier * N symbol of fixing each PRB is supposed the bit number B=1-12 that each subcarrier carries, code length=A * M * N * B then, and wherein the span of A support is determined by system; Like A=1,2,3; 4 ..., B is the modulation bit number.
Visible from preceding text, the span of A has determined system need design the code word number of types of definition.The system that considers supports the restricted number of code word type, and the number of A is suitable littler.
Embodiment 4
In the embodiment of the invention 4, definition supports a PRB to carry the mode of a code word in system, and through sub-carrier number or symbolic number in the configuration PRB, the size that promptly changes PRB realizes elongated PRB, thereby realizes that single PRB carries long code word.
Of preamble, the running time-frequency resource lattice number of each PRB=M number of sub-carrier * N symbol.Through expansion sub-carrier number or symbolic number, obtain formula:
The running time-frequency resource lattice number of PRB=(number of sub-carrier of A * M) * (the individual symbol of B * N),
Wherein, A be sub-carrier number after the expansion with respect to the multiple of former subcarrier, B is that symbolic number after the expansion is with respect to the multiple of former symbolic number.A, B are configurable.A considers that system supports the restricted number of sign indicating number type, A, number suitable littler.
The CO end can be according to the user's bandwidth demand, and the user big to the bandwidth demand amount selects the long code word bearing mode as far as possible.When distributing the PRB resource, the value of A, B can dispose in whole system together, is identical to the value of all user A; The value of A, B also can be provided with separately to certain user, as to needing the user of long code word individually, can select to be provided with bigger A, B value.
Fig. 5 is the data transmitting equipment according to the embodiment of the invention.This data transmitting equipment is applied in the OFDMA system.This data transmitting equipment comprises:
Transmitting element 54, being used for PRB is that unit carries out the data transmission.
Preferably, said extraction unit adopts the one or more code word bearing modes of indicating in bearing mode identifier, code word size identifier, the afterbody processing mode identifier.
Preferably, extraction unit is placed on the data of a code word respectively on a plurality of PRB.
Preferably, extraction unit comprises second code word is placed into the unit on the PRB that is placed with first code word.
Preferably, said data transmitting equipment comprises selected cell, is used to select the identical PRB of bit bearing capacity to carry same code word.
Preferably, data transmitting equipment comprises the change unit, is used for carrying a code word through changing the size of said Physical Resource Block.
The variety of way that concrete data transmitting equipment is encoded to data sees also the specific descriptions of the foregoing description 1-3.
Fig. 6 is the data receiver according to the embodiment of the invention.This receiving equipment is applied in the OFDMA system.This receiving equipment comprises: receiving element 62 is used to receive the PRB data; Extraction unit 64 is used for according to the code word bearing mode, from PRB, extracts the data after encoding; Decoding unit 66 is used for the data behind the coding are decoded.
Correspondingly, when wherein the code word bearing mode was code word of a plurality of PRB carryings, said receiving equipment extracted the data of two code words from a PRB.
Data behind the received code that concrete data receiver is carried out, and the process of carrying out corresponding decoding sees also the specific descriptions of the foregoing description 1-3.
The present invention has defined the mode that multiple PRB carries the FEC code word.The mode that these PRB carry the FEC code word is configurable, and brings following significant benefit.When the data volume that connects when certain bar is big, can select long code word, promptly a plurality of PRB carry a long code word, and long code word is brought the gain improvement of FEC.As adopt a long code word to carry a MPDU (MAC Payload Data Unit, MAC load data unit), because LLC header overhead byte is constant, so MAC efficient also gets a promotion.Keep the configuration item that an original PRB carries a short code word, when weak point wraps more and low delay requirement, still can pass through this mode of selection of configuration.
The embodiment of the invention also provides and has comprised a kind of communication system that comprises orthogonal frequency division multiple access system; Comprise 4 described data transmitting equipment and data receivers like embodiment; Wherein, Said data equipment specifically comprises: extraction unit 52, be used for according to the code word bearing mode, and data are placed on the Physical Resource Block PRB behind the coding of extraction respective length; Transmitting element 54, being used for PRB is that unit carries out the data transmission.Said receiving equipment specifically comprises:: receiving element 62 is used to receive the PRB data; Extraction unit 64 is used for according to the code word bearing mode, from PRB, extracts the data after encoding; Decoding unit 66 is used for the data behind the coding are decoded.
The present invention has defined the mode that multiple PRB carries the FEC code word.The mode that these PRB carry the FEC code word is configurable, and the data transmission efficiency that has solved existing ofdm system is low, the problem of user experience; And then improve data transmission efficiency and user satisfaction, further, when the data volume that connects when certain bar is big; Can select long code word; Long code word can also be brought the gain improvement of FEC, in data volume hour, can carry the configuration item of a short code word through PRB; When weak point wraps more and low delay requirement, still can improve data transmission efficiency through this mode of selection of configuration.
Though preamble combines the FEC code word that each embodiment of the present invention is described, the present invention is equally applicable to the carrying of other code word obviously.In addition, PRB not only means the Resource Block of the OFDMA system under the LTE system, also contains the time-frequency piece of the OFDMA system under other system.
Above-described embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely embodiment of the present invention; And be not used in qualification protection scope of the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1. a data transmission method for uplink that is applied in the orthogonal frequency division multiple access system is characterized in that, said data transmission method for uplink comprises: according to the code word bearing mode, the data of extracting respective length in the code word are placed on the Physical Resource Block; With said Physical Resource Block is that unit carries out the data transmission.
2. the method for claim 1 is characterized in that, said method also comprises: adopt the one or more identifier indication code word bearing modes in bearing mode identifier, code word size identifier, the afterbody processing mode identifier.
3. the method for claim 1 is characterized in that, said code word bearing mode is that a plurality of Physical Resource Block carry a code word.
4. method as claimed in claim 3 is characterized in that, the data of respective length are placed on the Resource Block and specifically comprise in code word of said extraction: second code word is placed on the Physical Resource Block that is placed with first code word.
5. the method for claim 1 is characterized in that, said method also comprises: select the identical Physical Resource Block of bit bearing capacity to carry same code word.
6. the method for claim 1 is characterized in that, said code word bearing mode carries a code word for through changing the size of said Physical Resource Block.
7. a data receive method that is applied in the orthogonal frequency division multiple access system is characterized in that, said method of reseptance comprises:
Receive Physical Resource Block; According to the code word bearing mode, from said Physical Resource Block, extract the data after encoding; Data to behind the coding are decoded.
8. method as claimed in claim 7 is characterized in that, said code word bearing mode is that a plurality of Physical Resource Block carry a code word.
9. method as claimed in claim 8 is characterized in that, the said data of from Physical Resource Block, extracting after encoding specifically comprise: the data of extracting two code words from a Physical Resource Block.
10. a data transmitting equipment that is applied in the orthogonal frequency division multiple access system is characterized in that, said data transmitting equipment comprises:
Extraction unit, according to the code word bearing mode, data are placed on Physical Resource Block behind the coding of extraction respective length;
Transmitting element is that unit carries out the data transmission with said Physical Resource Block.
11. data transmitting equipment as claimed in claim 10 is characterized in that, said extraction unit adopts the one or more identifier indication code word bearing modes in bearing mode identifier, code word size identifier, the afterbody processing mode identifier.
12. data transmitting equipment as claimed in claim 10 is characterized in that, said extraction unit specifically is used for the data of a code word are placed on a plurality of Physical Resource Block respectively.
13. data transmitting equipment as claimed in claim 12 is characterized in that, said extraction unit specifically is used for second code word is placed into the Physical Resource Block that is placed with first code word.
14. data transmitting equipment as claimed in claim 10 is characterized in that, said data transmitting equipment also comprises selected cell, is used to select the identical PRB of bit bearing capacity to carry same code word.
15. data transmitting equipment as claimed in claim 10 is characterized in that, wherein data transmitting equipment also comprises the change unit, is used for carrying a code word through changing the size of said Physical Resource Block.
16. a data receiver that is applied in the orthogonal frequency division multiple access system is characterized in that, said data receiver comprises:
Receiving element is used to receive Physical Resource Block;
Extraction unit is used for according to the code word bearing mode, from said Physical Resource Block, extracts the data after encoding;
Decoding unit is used for the data behind the coding are decoded.
17. data receiver as claimed in claim 16 is characterized in that, said extraction unit specifically is used for, and the said data of from Physical Resource Block, extracting after encoding specifically comprise: the data of extracting two code words from a Physical Resource Block.
18. a communication system that comprises orthogonal frequency division multiple access system is characterized in that, said communication system comprises: the described data receiver of one of the described data transmitting equipment of one of claim 10-15 and claim 16-17.
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| PCT/CN2011/082129 WO2012167548A1 (en) | 2011-11-14 | 2011-11-14 | Method, apparatus and system for transmitting and receiving data in orthogonal frequency division multiple access system |
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| CN103004123A (en) * | 2012-09-12 | 2013-03-27 | 华为技术有限公司 | Method of adapting fec codeword to physical resource block, method of synthesizing fec codeword and system thereof |
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| WO2014040247A1 (en) * | 2012-09-12 | 2014-03-20 | 华为技术有限公司 | Method for adapting forward error correction (fec) codewords to physical resource block, method for synchronizing fec codewords and system thereof |
| CN103004123B (en) * | 2012-09-12 | 2015-07-08 | 华为技术有限公司 | Method of adapting fec codeword to physical resource block, method of synthesizing fec codeword and system thereof |
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| CN102640470B (en) | 2014-11-05 |
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