CN101610463A - A kind of sending method of wireless data - Google Patents
A kind of sending method of wireless data Download PDFInfo
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- CN101610463A CN101610463A CNA2008101114678A CN200810111467A CN101610463A CN 101610463 A CN101610463 A CN 101610463A CN A2008101114678 A CNA2008101114678 A CN A2008101114678A CN 200810111467 A CN200810111467 A CN 200810111467A CN 101610463 A CN101610463 A CN 101610463A
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Abstract
The invention discloses a kind of sending method of wireless data packet, comprising: A: will be divided into a plurality of data segments behind the initial data packet encoder; B: each data segment is mapped to discontinuous in time transmission on the different resources respectively.The present invention can satisfy the terminal of different link-qualities, receiving only needs the data volume that receives this moment and handles to get final product separately, so help saving the good terminal power of link-quality, this send mode not only is suitable for the business of point-to-point, is fit to point-to-multipoint service more.
Description
Technical field
The present invention relates to a kind of sending method of wireless data, relate in particular to the sending method of packet in MBMS (multimedia broadcasting and multicast) business.
Background technology
The transmission medium of radio communication promptly is a wireless channel, and more precisely, wireless channel is the propagation path between antenna for base station and the user antenna.Antenna induction electric current and produce electromagnetic viscosimeter and give off electromagnetic wave, these electromagnetic waves be in free space or airborne spread, is received antenna at last and responds to and produce induced current.The electromagnetic wave propagation path may comprise that direct projection is propagated and non-direct projection is propagated, and the existence of multiple propagation path has caused the variation of wireless signal feature.
The fading characteristic of wireless channel depends on propagation environment of radio wave.Different environment, its propagation characteristic also is not quite similar.For example, one has the big city of many skyscrapers to compare with smooth open rural area, and its communication environments has a great difference, and both characteristics of radio channels are also variant greatly.And communication environments itself is quite complicated and changeable, and this just makes that characteristics of radio channels also is very complicated.Complicated, abominable propagation conditions is the feature of wireless channel, and this is determined by carrying out this mode of radio communication itself at the volley.
How on limited bandwidth and in the complicated wireless channel environment, to improve message transmission rate to greatest extent, just how to improve band utilization efficient to greatest extent, become the research focus of mobile communication gradually.And link adaptation techniques (LA:Link Adaptation) is being just because of having very strong advantage aspect the message transmission rate and the availability of frequency spectrum improving, thereby becomes at present and one of key technology of future mobile communication system.
Link adaptation techniques is generally at time domain at present.That is to say that dynamically the parameter of adjusting mainly is time domain parameters such as modulation system, coded system.System becomes some kinds " MCS (Modulation and Coding Scheme Modulation and Coding Scheme) " with different codings with modulation mode combination, select according to channel situation for system.User near the base station, have the good quality channel condition, the higher Modulation and Coding Scheme of rank (16 state quadrature amplitude modulation 16QAM for example will be assigned with, the Turbo code of 3/4 code check), the interference free performance and the error correcting capability of this Modulation and Coding Scheme are relatively poor, to having relatively high expectations of channel quality, but can win higher data speed, improve the average data throughput of link.On the contrary, be in the user of cell boarder, channel fading is serious or existence is serious disturbs and noise, the rank that is assigned with is lower, has strong error correcting capability, noise proof feature is the Modulation and Coding Scheme of Modulation and Coding Scheme (for example quaternary phase shift is modulated QPSK, the Turbo code of 1/2 code check) preferably, to guarantee the reliable transmission of data.This The Application of Technology is measured by terminal at present, reports to the base station, carries out unified scheduling by the base station, decides to each terminal to adopt what other MCS of level.But this technology only limits to unicast service, can not directly be suitable for for the MBMS business.
For MBMS is professional, be the particular service of a point to multiple spot, different with unicast service, the base station can not come to be the suitable MCS of each terminal scheduling according to each link of terminal quality situation, and need consider all reliable reception of all terminals that receive this MBMS service.Therefore, the MBMS business according to the link-quality situation of poor user, is formulated transmission rate in order to look after the user in the whole M BMS service area; And in LTE (long evolving system), consider the situation of SFN (Single FrequencyNetwork Single Frequency Network) or even formulate MCS with the link-quality situation of the poor user in whole SFN zone.All data that the terminal receiving end/sending end sends are deciphered processing, obtain initial data.
Above-mentioned terminal has received all data that transmitting terminal sends, and this method can be brought too much reception redundant information for link-quality terminal preferably.At the problems referred to above, this method proposes a kind of sending method that helps reducing the power consumption of the good terminal of link-quality.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of sending method of wireless data, to satisfy for the terminal that possesses different link-qualities, being convenient to optionally receive only needs the data volume that receives this moment and handles to get final product separately, so helps saving terminal power.
In order to address the above problem, the invention provides a kind of sending method of wireless data packet, comprising:
A: will be divided into a plurality of data segments behind the initial data packet encoder;
B: each data segment is mapped to discontinuous in time transmission on the different resources respectively.
Further, in the described steps A, raw data packets is added the cyclic redundancy check (CRC) code CRC check, and carry out chnnel coding, the data behind the coding that obtains forming by information bit and check digit.
Further, in the described steps A, the data behind the coding are interweaved, and respectively described information bit and check digit are reassembled as different data segments.
Further, the full detail position in the data that obtain behind the initial data packet encoder is binned in the data segment.
Further, described each data segment, length equates.
Further, transmitting terminal is carried at the size of described raw data packets and resource mapping distribution situation in the control information and issues.
Further, among the described step B, leave the time interval between the described data segment when mapping sends, the duration at described interval is finished more than or equal to receiving terminal and is once deciphered required duration.
Further, among the described step B, each data segment is mapped to OFDM symbol on the different subframes or the discontinuous in time transmission of different OFDM symbols on the same subframe respectively.
Compared with prior art, the present invention can satisfy the terminal of different link-qualities, and receiving only needs the data volume that receives this moment and handle to get final product separately, so helps saving the good terminal power of link-quality, this send mode not only is suitable for the business of point-to-point, is fit to point-to-multipoint service more.
Description of drawings
Fig. 1 is a method flow diagram in the embodiment of the invention;
Fig. 2 is the schematic diagram that the individual data bag sends in the embodiment of the invention;
Fig. 3 is that the symbol in the subframe is formed schematic diagram in the embodiment of the invention;
Fig. 4 is the multiple step format mapping schematic diagram of a plurality of raw data packets in the embodiment of the invention.
Embodiment
The present invention further sets forth the sending method of a kind of wireless data of the present invention in order to solve the drawback that conventional solution exists by following specific embodiment, below embodiment is described in detail, but not as a limitation of the invention.
Core thinking of the present invention is: to one or more raw data packets, carry out chnnel coding according to low relatively code check, again information bit and check digit are reassembled into a plurality of segmentations, the several data segments in these same raw data packets are sent in time at interval.
As shown in Figure 1, be method flow diagram in the embodiment of the invention.
Carry out chnnel coding according to lower code check, mainly be because the MBMS business will be considered the link of terminal quality difference of diverse location in the sub-district, in order to consider the accurate decoding of the terminal that link-quality is relatively poor, so adopt lower code check that data are carried out chnnel coding;
The process that interweaves is generally used in the prior art, does not repeat them here; Optimum interleaving scheme can interweave to information bit and check digit separately, so that the back is found information bit and check digit again during segmentation easily.
, carry out segmentation again for the data behind the coding herein, optimum segmentation scheme: keep all information bits continuous, and divide in same section, each data segment that is divided into (S section, P1 section and P2 section) length is consistent; The segmentation scheme of suboptimum: keep the overwhelming majority of information bit continuous, and divide in same section, each data segment, length that is divided into can be inconsistent;
Leave the time interval between the data segment after the reorganization when mapping sends, the duration at described interval is greater than the handling duration of first received data segment; Different pieces of information section in the same packet sends in time at interval, mainly is to want the data multiple step format ground discontinuity behind the initial data packet encoder is sent.
In addition, transmitting terminal is except the data segment of the data segment that sends information bit and check digit, in current period, also issue control information, carry the information such as size, modulation system and resource mapping situation of the raw data packets of waiting to receive the data correspondence in the current period in this control information.The resource mapping ruler can be finished by transmitting terminal is pre-configured.
As shown in Figure 2, the schematic diagram that sends for individual data bag in the embodiment of the invention.Raw data packets among the figure 1 described the present invention is described.
Wherein S, P1 and the order of P2 are reconfigured segmentation, suppose to be divided into 3 sections; A kind of method of segmentation is described below, can be information bit as the S section, check digit is divided into two sections (P1 section and P2 sections), and each section can equate.
Each data segment is carried out resource mapping and framing, and the purpose of segmentation is (on different time points) discontinuous transmission of the data segment after the raw data packets chnnel coding.For example on a certain resource that first section is mapped to subframe 1#, on a certain resource that the 2nd section is mapped to subframe 3#, on a certain resource that the 3rd section is mapped to subframe 5#.Subframe is launched in order on time, and promptly shooting sequence is 1#, 2#, 3#, 4#, 5#....
As shown in Figure 3, in the system of OFDMA (OFDM access) as multi-access mode, general subframe inside is further divided into OFDM (OFDM) symbol, in a subframe 6 or 7 OFDM symbols can be arranged among the LTE, an OFDM symbol, on frequency, account for entirely, keep a period of time in time.OFDM symbol among the LTE for example, time span is (0.5/7) ms, frequency account for whole system bandwidth, i.e. 20M.First segment data can be mapped on first OFDM symbol on the 1# subframe, and other OFDM symbols can carry other and this irrelevant data of bag.
Above-mentioned with the segmentation behind raw data packets 1 coding, be mapped on the symbol of different frames this method be described, but the invention is not restricted to this, said method also can similarly be generalized on the different discontinuous symbol that is mapped to same subframe.
Describe with an application example below, referring to Fig. 4.
The information bit S that raw data packets 1 produces behind coding, check digit P1 and check digit P2.Adopt a kind of simple segmentation method, promptly be divided into 3 sections to 1 ', information bit is one section, and check digit is divided into two equal segments, is designated as P1 and P2 respectively.Wherein P1 and P2 interweave with evenly mixing later check digit.
Size is 100bit after supposing raw data packets 1 interpolation CRC check.Packet 1 is adopted the turbo coding, code check is 1/3, obtains the information bit S after packet 1 is encoded respectively, and size is 100bit, check digit P1, size is 100bit, check digit P2, and size is 100bit, certainly check digit can interweave here, can think directly that check digit is 200bit, not distinguish P1 and P2 (because general P1 and P2 interweaved in the real system, mix uniformly).
Information bit S behind packet 1 coding is mapped on the 2nd the OFDM symbol of subframe 1#, and check digit P1 is mapped on 2 OFDM symbols of subframe 3#, and check digit P2 is mapped on the 3rd OFDM symbol of subframe 5#; Carry out going up antenna transmission after the conventional treatment.
Should be with in the example, be spaced apart the duration of a subframe between the data after the segmentation, here Jian Ge duration is more preferably greater than the duration of first section data that receive of terminal processes, in the time of can guaranteeing first section decoding error of terminal like this, can also receive remaining data, decipher with the data aggregate of first section reception again;
And receiving terminal is known the resource mapping distribution situation after raw data packets 1 is encoded, the size of raw data packets 1, information such as modulation system by modes such as control information or agreements.
As shown in Figure 4, the multiple step format for a plurality of raw data packets in the embodiment of the invention shines upon schematic diagram.
After raw data packets 1,2 and 3 is carried out chnnel coding respectively, obtain data 1 ', 2 ' and 3 ', wherein 1 ', 2 ', 3 ' all is made up of information bit and check digit.Adopting above-mentioned segmentation method to carry out combined section to 1 ', 2 ', 3 ' respectively handles.The information bit of 1 ' segmentation is mapped on the 2nd the OFDM symbol of subframe 1#, and the check information of 1 ' segmentation is mapped on the 2nd symbol of subframe 3# and on the 3rd symbol of subframe 5#.The information bit of 2 ' segmentation is mapped on the 3rd the OFDM symbol of subframe 1#, and the check information of 2 ' segmentation is mapped on the 3rd symbol of subframe 3# and on the 5th symbol of subframe 5#.The information bit of 3 ' segmentation is mapped on the 5th the OFDM symbol of subframe 1#, and the check information of 3 ' segmentation is mapped on the 5th symbol of subframe 3# and on the 6th symbol of subframe 5#.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (8)
1, a kind of sending method of wireless data packet is characterized in that, comprising:
A: will be divided into a plurality of data segments behind the initial data packet encoder;
B: each data segment is mapped to discontinuous in time transmission on the different resources respectively.
2, the method for claim 1 is characterized in that,
In the described steps A, raw data packets is added the cyclic redundancy check (CRC) code CRC check, and carry out chnnel coding, the data behind the coding that obtains forming by information bit and check digit.
3, method as claimed in claim 2 is characterized in that,
In the described steps A, the data behind the coding are interweaved, and respectively described information bit and check digit are reassembled as different data segments.
4, method as claimed in claim 3 is characterized in that,
Full detail position in the data that obtain behind the initial data packet encoder is binned in the data segment.
5, as claim 1 or 3 described methods, it is characterized in that,
Described each data segment, length equates.
6, the method for claim 1 is characterized in that,
Transmitting terminal is carried at the size of described raw data packets and resource mapping distribution situation in the control information and issues.
7, the method for claim 1 is characterized in that,
Among the described step B, leave the time interval between the described data segment when mapping sends, the duration at described interval is finished more than or equal to receiving terminal and is once deciphered required duration.
8, the method for claim 1 is characterized in that,
Among the described step B, each data segment is mapped to OFDM symbol on the different subframes or the discontinuous in time transmission of different OFDM symbols on the same subframe respectively.
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| CN2008101114678A CN101610463B (en) | 2008-06-19 | 2008-06-19 | Method for sending wireless data |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013159733A1 (en) * | 2012-04-27 | 2013-10-31 | 电信科学技术研究院 | Method, system, and device for performing uplink transmission |
| CN106506117A (en) * | 2016-11-01 | 2017-03-15 | 深圳职业技术学院 | A kind of data transmission method of robust |
| CN106656435A (en) * | 2016-11-01 | 2017-05-10 | 深圳职业技术学院 | Data first transmission and retransmission method |
| CN108804290A (en) * | 2018-06-13 | 2018-11-13 | 姜锋 | A kind of method and system for movable storage device information transmission security |
| CN110602687A (en) * | 2018-06-13 | 2019-12-20 | 华为技术有限公司 | Method and device for sending and receiving capability information |
| CN112188546A (en) * | 2019-07-03 | 2021-01-05 | 成都华为技术有限公司 | Method and device for transmitting data |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3840435B2 (en) * | 2002-07-05 | 2006-11-01 | 松下電器産業株式会社 | Radio communication base station apparatus, radio communication mobile station apparatus, and radio communication method |
| CN101291452B (en) * | 2007-04-18 | 2011-11-16 | 华为技术有限公司 | Data transmitting method and device |
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2008
- 2008-06-19 CN CN2008101114678A patent/CN101610463B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013159733A1 (en) * | 2012-04-27 | 2013-10-31 | 电信科学技术研究院 | Method, system, and device for performing uplink transmission |
| US9325464B2 (en) | 2012-04-27 | 2016-04-26 | China Academy Of Telecommunications Technology | Method, system, and device for performing uplink transmission |
| CN106506117A (en) * | 2016-11-01 | 2017-03-15 | 深圳职业技术学院 | A kind of data transmission method of robust |
| CN106656435A (en) * | 2016-11-01 | 2017-05-10 | 深圳职业技术学院 | Data first transmission and retransmission method |
| CN106656435B (en) * | 2016-11-01 | 2019-06-25 | 深圳职业技术学院 | A kind of data head passes, repeating method |
| CN106506117B (en) * | 2016-11-01 | 2019-12-27 | 深圳职业技术学院 | Robust data transmission method |
| CN108804290A (en) * | 2018-06-13 | 2018-11-13 | 姜锋 | A kind of method and system for movable storage device information transmission security |
| CN110602687A (en) * | 2018-06-13 | 2019-12-20 | 华为技术有限公司 | Method and device for sending and receiving capability information |
| CN112188546A (en) * | 2019-07-03 | 2021-01-05 | 成都华为技术有限公司 | Method and device for transmitting data |
| CN112188546B (en) * | 2019-07-03 | 2023-06-27 | 成都华为技术有限公司 | Method and device for transmitting data |
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Application publication date: 20091223 Assignee: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Assignor: ZTE Corporation Contract record no.: 2015440020319 Denomination of invention: Method for sending wireless data Granted publication date: 20130508 License type: Common License Record date: 20151123 |
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