CN1780255A - Wireless data transmission with nonuniform protection - Google Patents
Wireless data transmission with nonuniform protection Download PDFInfo
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- CN1780255A CN1780255A CNA2004100916118A CN200410091611A CN1780255A CN 1780255 A CN1780255 A CN 1780255A CN A2004100916118 A CNA2004100916118 A CN A2004100916118A CN 200410091611 A CN200410091611 A CN 200410091611A CN 1780255 A CN1780255 A CN 1780255A
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Abstract
When data with time sequence relationship in same data flow has important level, uses relevant security level transmission strategy to improve transmission efficiency. It includes: at sending end, packets waiting to send are given different level reference value according to its different level importance. The packet with higher- level reference value has higher importance. According to level reference value of packet and channel condition, generates a group of configuring parameters of max retransmission times, channel coding scheme and modulation scheme, and base on the parameters, encodes and modulates the packets waiting to send. The processed packets are transmitted with the configuring parameters. The receiving end receives the configuring parameter, and base on the configuring parameter, makes decode and demodulation for the received packet. In Hybrid Automatic Repeat Request (HARQ) process, obeys max retransmission times given out by configuring parameters.
Description
Technical field
The present invention relates to the wireless data transmission technology in the mobile communication system; relate to a kind of radio data transmission method of nonuniform protection or rather; when the data that have sequential relationship in the same code stream that will transmit have different safe classes; adopt different processing methods to transmit, thereby improve the overall transfer efficient of data.
Background technology
In mobile communication process, how utilizing limited frequency spectrum resources to transmit more user data is a crucial problem.Link circuit self-adapting (LA:LinkAdaptation) technology that comprises in the data transmission technology owing to aspect the raising message transmission rate and the availability of frequency spectrum very strong advantage is being arranged, has become one of key technology of present and future mobile communication system at present.It as a kind of new high-speed packet transmission technology, is one of them typical representative that high speed downlink packet inserts (HSDPA:High Speed Down Provide Access).
The key technology that HSDPA adopts is Adaptive Modulation and Coding (AMC) and mixes and repeat (HARQ) automatically.Wherein the AMC technology is according to the quality of channel situation, selects only modulation and coded system to carry out transfer of data.The Turbo code that chnnel coding adopts the 1/3Turbo sign indicating number and produces other speed by corresponding code check coupling back.Combination by coding and modulation system can produce different transmission rates.And the HARQ technology is based on channel condition and provides accurate code rate to regulate, and can adapt to instantaneous channel conditions automatically.
The above link adaptation techniques of introducing, the just Link State of being concerned about, what emphasize is how to adjust Control Parameter in the transfer of data adaptively according to the variation of link circuit condition, such as coded system, modulation system, preferable cell etc., reach maximum message transmission rate, also be that link adaptation techniques is not consider the data self character, promptly do not adjust transmission according to the characteristic of data itself.
Include the notion (Priority class) of priority in the HSDPA technology, priority control is arranged, but the control of the priority among the HSDPA only is the precedence when being used for the specified data transmission, the data block of equal priority logically is arranged to a code stream, the data code flow prioritised transmission of high priority, each such priority code stream all have oneself independently transmission sequence number (TSN).System can adopt different coding, modulation and re-transmission policy to data according to the state self-adaption ground of channel, but the foundation of HSDPA re-transmission policy judgement is the importance characteristic of channel status rather than data.The difference of service quality (QOS) is also arranged among the HSDPA, but this QOS is corresponding different application, such as the different Q OS of speech, video, data etc., rather than in the same code stream, have the importance of the data of sequential relationship to each other.Because not having definition of data safety of transmission, its consequence is exactly to guarantee that the error rate of high-priority data is just littler than the lower-priority data, does not guarantee that promptly the data of high priority obtain higher transmission accuracy.
In fact, in the process of data communication, be not that all data all have identical importance.Frame data that produce such as speech coding just are divided into A, B, and three parts of C, they have different security features.During transmission iff considering link circuit self-adapting; and thereby the security features of not considering data itself adopts identical transmission policy merely; will make important data can not get due transmission guarantee; and unessential data may be given too much protection; thereby cause the waste of whole resource, reduced the whole efficiency of transfer of data.
Therefore in existing link self-adaption transmission method; the application code stream that each several part data is had different importance; adopting identical error protection mechanism and identical transmission protection strategy, obviously is irrational, consequently is equivalent to and has reduced bandwidth utilization.
Summary of the invention
The objective of the invention is to design a kind of radio data transmission method of nonuniform protection; when the data that have sequential relationship in the same code stream that will transmit have different safe classes; adopt different processing methods to transmit, thereby improve the overall transfer efficient of data.
The technical scheme that realizes the object of the invention is such: a kind of radio data transmission method of nonuniform protection is applicable to that the data that have sequential relationship in the same code stream are surrounded by under the situation of different severity levels, is characterized in that comprising:
A. transmitting terminal is given different severity level parameter values with packet to be sent according to its different severity level feature, and the packet that the severity level parameter value is high more is important more;
B. transmitting terminal is adjudicated jointly according to the severity level parameter value and the channel condition of packet, produces a set of configuration parameters, and this configuration parameter makes the packet of different severity levels obtain the transmission policy of corresponding safe class, and this configuration parameter transmits with packet;
C. receiving terminal obtains described configuration parameter, by configuration parameter the packet that receives is unpacked and handles and carry out the automatic HARQ of repetition of mixing process.
Configuration parameter among the described step B comprises maximum retransmission, channel coding schemes and modulation scheme, and by encoding scheme, modulation scheme to packet to be sent encode, modulation treatment, obtain the transmission policy of described corresponding safe class; Among the described step C, be by described encoding scheme, modulation scheme to the packet that receives decode, demodulation process and repeat automatically to obey the maximum retransmission that provides in the configuration parameter in the HARQ process mixing.
Common judgement among the described step B, comprise: adopt low modulation rate, low code rate and high maximum retransmission for the packet of severity level parameter value height or bad channel conditions, or packet that channel condition good low for the severity level parameter value adopts high modulation rate, high code rate and low maximum retransmission, even maximum retransmission is zero.
The radio data transmission method of nonuniform protection of the present invention, transmitting terminal is given different severity level parameter values with packet to be sent according to its different importance characteristic in packet packet header; Transmitting terminal is adjudicated jointly according to the severity level parameter value and the channel condition of packet, generation comprises a set of configuration parameters of maximum retransmission, channel coding schemes, modulation scheme, and by configuration parameter to packet to be sent encode, modulation treatment, this configuration parameter transmits with the packet after handling; Receiving terminal obtains described configuration parameter, and the packet that receives is carried out demodulation, decoding and repeats automatically in the HARQ process mixing by configuration parameter, press given maximum retransmission carry out and retransmit, promptly be no more than the maximum retransmission of appointment.
Because the data of being transmitted in the communication often do not have identical importance, and the existing high speed data transfer technology transmission policy identical to all The data, this is not a kind of scheme of optimization.Data in the same code stream with sequential relationship that the present invention supposes to transmit are divided into different safety class, and adopt the transmission policy of corresponding safe class in transmission course respectively, thereby have improved the overall transfer efficient of data.
The present invention is the safe class according to data, in the process of HARQ, carry out the method for respective handling, promptly high more reliable, the safer transmission means of The data to safe class, select code rate and the lower transmission mode of modulation system, the low data of safe class are then adopted code rate and the higher transmission mode of modulation system.In the transmission control procedures, the judgement of " importance information " fellowship AMC of channel state parameter and data.
The present invention not only decides MCS according to channel status, but allows the judgement of data " severity level " and channel state parameter fellowship AMC.The present invention has between to data in the same data flow of sequential relationship; to the different protection strategy of The data that transmission has different importance, i.e. the transmission protection strategy of the data that the transmission of the data that severity level is high protection strategy is lower than important rank is safer, reliable.
In the process of transmission, the existing processing policy, also as an adjustable parameter, the data that promptly level of security is high allow to be retransmitted by more times ground HARQ " permission number of retransmissions " in HSDPA.
Method of the present invention; not only can select coding, modulation strategy according to the state of channel; can also be to the The data in the same data flow that has sequential relationship between the data different protection strategies with different severity levels; promptly adopt the different number of retransmissions of different codings, modulator approach and execution adaptively, the whole efficiency of wireless data transmission is improved.
Description of drawings
Fig. 1 is the processing procedure schematic diagram of data sending terminal (base station);
Fig. 2 is the processing procedure schematic diagram of data receiver (user terminal).
Embodiment
Technology described in the invention on the basis of adopting link adaptation techniques, adds this factor of data " importance information ".For convenience narration is designated hereinafter simply as the V-parameter, makes it to participate in adjusting to AMC and HARQ parameter with the Link State parameter.The high more expression data of the V-parameter value of data are important more.Be embodied in the process of HARQ the transmission parameter configuration different to the The data of different V-parameter values.
Usually, the application layer data in the same data flow also is divided into different important level.This is a hypothesis of the present invention, also is the fact of objective reality, for example at AMR (Adaptive Multi Rate), can produce the data of different important level in the code stream that Mpeg4, encoders such as H26L produce, they often can be divided into A, B, the C Three Estate.These data can form the user data package (SDU) with different V-parameter values.
Method of the present invention is in the wireless transmission processing procedure of data, not only determine Modulation and Coding Scheme (MCS) according to channel status, also consider the V-parameter of data, the data of different V-parameter values are taked different codings, modulation and re-transmission (HARQ) strategy.
Referring to Fig. 1, the processing procedure of data sending terminal (Node B end).Its main feature is: the V-parameter of data is also as one of input of AMC judging module.
Because the data that produced by different application layer software have different storage modes, therefore need the form of SDU be standardized, define unified data packet format.Narration for convenience; abbreviate the wireless data transmission technology of nonuniform protection of the present invention as UPw technology (Unequal Protectedwireless data transmission), abbreviate this user data package SDU as UPw-SDU by the standardization uniform format.In UPw-SDU packet header, possesses the V-parameter, the variable-length of bag.
Step 11 is carried out UPw-SDU standard or format conversion.The division that has produced for existing application grade data package need carry out the conversion of form, promptly be converted to UPw-SDU; For the application program of not considering that still data level is divided, can advise that these application programs come encapsulated data packet according to the UPw-SDU form of standard.
Node B end transmits the packet header of each the user data package UPw-SDU that gets off and all carries the V-parameter information from the user, this V-parameter information has reflected the data importance rank of corresponding data bag.Node B holds the concrete processing procedure to the UPw-SDU that sends can be divided into following step:
Step 12, at first resolve the packet header of each user data package UPw-SDU, therefrom extract the data importance rank of each packet---V-parameter, and the V-parameter that will from each UPw-SDU packet header, extract, give one of AMC (Adaptive Modulation and Coding) judging module foundation as judgement, the user data package SDU after resolving send media interviews controls (MAC) layer and physical layer process.
Step 13 also sends channel condition information (channel condition) to AMC judging module another foundation as judgement, and channel condition information has multiple source, for example the statistical information of the metrical information of lower floor, HARQ etc.The AMC judging module perhaps by calculating or generating coded modulation (MCS) scheme by tabling look-up, is sent media interviews controls (MAC) layer and physical layer process simultaneously according to channel state parameter and V-parameter.
The MCS scheme is one group of transmission configuration parameter, and these parameters comprise maximum retransmission (ARQ), channel coding schemes, modulation scheme, and other auxiliary parameters.
Step 14, media interviews control (MAC) layer and physical layer are for the high packet of severity level-V-parameter value or under the situation of channel status difference, all adopt the scheme of more reliable coding and modulation, promptly adopt lower code rate and lower modulation rate (transmission rate will reduce certainly), on the contrary, for the low packet of severity level-V-parameter value or under the good situation of channel status, then adopt higher code rate and higher modulation rate.In addition, in the HARQ process, the maximum retransmission that packet allowed high to the V-parameter value is also high.
During enforcement, ARQ adopts schemes (N-channel-SAW-HARQ) such as multichannel stops, and considers to reduce transmission delay, preferably maximum retransmission is controlled in a certain fixed value, in 4 times.The method that adopts Chase to merge in the re-transmission is decoded.The maximum retransmission that concrete certain HARQ process is allowed and the V-relating to parameters of packet, but all can not surpass this fixed value.
Coded system can adopt Turbo coding, and basic rate is 1/3, by punching with repeat to generate the transmission data of various code rate.Modulation system can be selected multiple modulation system for use, comprises QPSK, 8-PSK, 16QAM, even 64QAM.
Node B end also sends the relevant parameter of above-mentioned MCS scheme to user terminal UE (other steps in the chnnel coding by the SDU packet of shared control channel after handling through coded modulation, and the specific algorithm of HARQ, be mature technology and irrelevant, do not list one by one) at this with method of the present invention.
Data are in the process of transmission, according to its original precedence transmission, to guarantee original sequential relationship between the data.
Referring to Fig. 2, the DRP data reception process of UE end.
An example is: in certain transmission, for the highest category-A packet of severity level (safe class), adopt 8-PSK modulation, 1/3Turbo coding and retransmit secondary at most; For the inferior high category-B packet of severity level (safe class), adopt 8-PSK modulation, 1/2Turbo coding and maximum the re-transmission once; For the minimum C class packet of severity level (safe class), adopt 8-PSK modulation, 1/2Turbo coding and do not retransmit.
Method of the present invention; not only can select coding, modulation strategy according to the state of channel; can also be to the The data in the same data flow that has sequential relationship between the data different protection strategies with different severity levels; promptly adopt different codings, modulation and repeating method adaptively, the whole efficiency of wireless data transmission is improved.
Claims (10)
1. the radio data transmission method of a nonuniform protection is applicable to that the data that have sequential relationship in the same code stream are surrounded by under the situation of different severity levels, is characterized in that comprising:
A. transmitting terminal is given different severity level parameter values with packet to be sent according to its different severity level feature, and the packet that the severity level parameter value is high more is important more;
B. transmitting terminal is adjudicated jointly according to the severity level parameter value and the channel condition of packet, produces a set of configuration parameters, and this configuration parameter makes the packet of different severity levels obtain the transmission policy of corresponding safe class, and this configuration parameter transmits with packet;
C. receiving terminal obtains described configuration parameter, by configuration parameter the packet that receives is unpacked and handles and carry out the automatic HARQ of repetition of mixing process.
2. method according to claim 1 is characterized in that: the assignment in the described steps A is that the severity level parameter value of each packet is composed in the packet header of each packet.
3. method according to claim 2; it is characterized in that: the severity level parameter value is composed in the packet header of each packet; the data that are division severity level that existing application has been produced are converted to the nonuniform protection data packets for transmission with consolidation form, contain the severity level parameter value of described division in packet packet header.
4. method according to claim 2; it is characterized in that: the severity level parameter value is composed in the packet header of each packet; it is the application program of not considering as yet that by existing the data severity level is divided; consolidation form according to the nonuniform protection data packets for transmission comes encapsulated data packet, contains the severity level parameter value in packet packet header.
5. method according to claim 1, it is characterized in that: the configuration parameter among the described step B comprises maximum retransmission, channel coding schemes and modulation scheme, and by encoding scheme, modulation scheme to packet to be sent encode, modulation treatment, obtain the transmission policy of described corresponding safe class; Among the described step C, be by described encoding scheme, modulation scheme to the packet that receives decode, demodulation process and repeat automatically to obey the maximum retransmission that provides in the configuration parameter in the HARQ process mixing.
6. method according to claim 5, it is characterized in that the common judgement among the described step B, comprise: adopt low modulation rate, low code rate and high maximum retransmission for the packet of severity level parameter value height or bad channel conditions, or packet that channel condition good low for the severity level parameter value adopts high modulation rate, high code rate and low maximum retransmission, even maximum retransmission is zero.
7. method according to claim 6 is characterized in that also comprising: described maximum retransmission is controlled in the fixed value.
8. method according to claim 1 is characterized in that: described judgement is to utilize severity level parameter value and channel condition to calculate, and perhaps tables look-up according to severity level parameter value and channel condition, obtains described transmission policy.
9. method according to claim 1 is characterized in that: the transmission among the described step B is to transmit by original precedence of packet, guarantees the sequential relationship between each packet.
10. method according to claim 1 is characterized in that: among the described step C, the configuration parameter that receiving terminal obtains sends receiving terminal by transmitting terminal to by shared control channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2004100916118A CN1780255A (en) | 2004-11-24 | 2004-11-24 | Wireless data transmission with nonuniform protection |
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| CNA2004100916118A CN1780255A (en) | 2004-11-24 | 2004-11-24 | Wireless data transmission with nonuniform protection |
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| CN1780255A true CN1780255A (en) | 2006-05-31 |
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| CNA2004100916118A Pending CN1780255A (en) | 2004-11-24 | 2004-11-24 | Wireless data transmission with nonuniform protection |
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Cited By (9)
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| WO2009052728A1 (en) * | 2007-10-15 | 2009-04-30 | Huawei Technologies Co., Ltd. | A method, system and apparatus for harq parameters configuration |
| WO2010057436A1 (en) * | 2008-11-19 | 2010-05-27 | Huawei Technologies Co., Ltd. | Systems and methods for scheduling and mu-mimo in uplink voip for ofdma/scfdma networks |
| WO2011009254A1 (en) * | 2009-07-21 | 2011-01-27 | 中兴通讯股份有限公司 | Retransmission method and system for enhanced multimeia broadcast multicast service |
| CN102013962A (en) * | 2009-09-04 | 2011-04-13 | 华为技术有限公司 | Data transmission method and equipment |
| WO2011109933A1 (en) * | 2010-03-09 | 2011-09-15 | 上海贝尔股份有限公司 | Method and apparatus for feeding back channel information in mimo wireless communication system |
| CN103888223A (en) * | 2014-04-01 | 2014-06-25 | 中国科学院微电子研究所 | Modulation control method and device |
| WO2018145521A1 (en) * | 2017-02-10 | 2018-08-16 | 华为技术有限公司 | Data transmission method, communication device, terminal and base station |
| CN109450943A (en) * | 2018-12-25 | 2019-03-08 | 重庆邮电大学 | Industrial time sensitive network multi-level safety data scheduling method |
| CN113612856A (en) * | 2021-08-19 | 2021-11-05 | 白杰 | Processing method of data to be transmitted and data transmitting method |
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2004
- 2004-11-24 CN CNA2004100916118A patent/CN1780255A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009052728A1 (en) * | 2007-10-15 | 2009-04-30 | Huawei Technologies Co., Ltd. | A method, system and apparatus for harq parameters configuration |
| WO2010057436A1 (en) * | 2008-11-19 | 2010-05-27 | Huawei Technologies Co., Ltd. | Systems and methods for scheduling and mu-mimo in uplink voip for ofdma/scfdma networks |
| US9215043B2 (en) | 2008-11-19 | 2015-12-15 | Futurewei Technologies, Inc. | Systems and methods for scheduling and MU-MIMO in uplink Vo-IP for OFDMA/SCFDMA networks |
| CN101964945B (en) * | 2009-07-21 | 2014-09-10 | 中兴通讯股份有限公司 | Method and system for retransmitting enhanced multimedia broadcast multicast service (E-MBMS) |
| WO2011009254A1 (en) * | 2009-07-21 | 2011-01-27 | 中兴通讯股份有限公司 | Retransmission method and system for enhanced multimeia broadcast multicast service |
| CN101964945A (en) * | 2009-07-21 | 2011-02-02 | 中兴通讯股份有限公司 | Method and system for retransmitting enhanced multimedia broadcast multicast service (E-MBMS) |
| CN102013962A (en) * | 2009-09-04 | 2011-04-13 | 华为技术有限公司 | Data transmission method and equipment |
| CN102687477A (en) * | 2010-03-09 | 2012-09-19 | 上海贝尔股份有限公司 | Method and apparatus for feeding back channel information in mimo wireless communication system |
| WO2011109933A1 (en) * | 2010-03-09 | 2011-09-15 | 上海贝尔股份有限公司 | Method and apparatus for feeding back channel information in mimo wireless communication system |
| CN103888223A (en) * | 2014-04-01 | 2014-06-25 | 中国科学院微电子研究所 | Modulation control method and device |
| CN103888223B (en) * | 2014-04-01 | 2019-01-08 | 中国科学院微电子研究所 | A kind of modulation control method and device |
| WO2018145521A1 (en) * | 2017-02-10 | 2018-08-16 | 华为技术有限公司 | Data transmission method, communication device, terminal and base station |
| CN108419275A (en) * | 2017-02-10 | 2018-08-17 | 华为技术有限公司 | A kind of data transmission method, communication equipment, terminal and base station |
| US11190626B2 (en) | 2017-02-10 | 2021-11-30 | Huawei Technologies Co., Ltd. | Data transmission method, communications device, terminal, and base station |
| CN108419275B (en) * | 2017-02-10 | 2022-01-14 | 华为技术有限公司 | Data transmission method, communication equipment, terminal and base station |
| EP3570590B1 (en) * | 2017-02-10 | 2023-07-05 | Huawei Technologies Co., Ltd. | Data transmission method, communication device, terminal and base station |
| CN109450943A (en) * | 2018-12-25 | 2019-03-08 | 重庆邮电大学 | Industrial time sensitive network multi-level safety data scheduling method |
| CN109450943B (en) * | 2018-12-25 | 2021-06-08 | 重庆邮电大学 | Industrial time sensitive network multi-level safety data scheduling method |
| CN113612856A (en) * | 2021-08-19 | 2021-11-05 | 白杰 | Processing method of data to be transmitted and data transmitting method |
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