CN101888289A - Hybrid automatic retransmission method and device - Google Patents
Hybrid automatic retransmission method and device Download PDFInfo
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- CN101888289A CN101888289A CN2009101429070A CN200910142907A CN101888289A CN 101888289 A CN101888289 A CN 101888289A CN 2009101429070 A CN2009101429070 A CN 2009101429070A CN 200910142907 A CN200910142907 A CN 200910142907A CN 101888289 A CN101888289 A CN 101888289A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1893—Physical mapping arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
Abstract
The invention discloses a hybrid automatic retransmission method, which is used for improving transmission reliability and comprises that: a transmitting end performs sub-carrier mapping of a pilot frequency according to a first pilot frequency pattern, performs sub-carrier mapping of data and transmits the mapped pilot frequency and data; after receiving an error receiving identifier, the transmitting end performs the sub-carrier mapping of the pilot frequency according to a second pilot frequency pattern, performs the sub-carrier mapping of the data, transmits the mapped pilot frequency and retransmits the mapped data; a receiving end performs channel estimation and decoding on received data stream according to the first pilot frequency pattern; in case of a decoding failure, the receiving end sends an error receiving identifier to the transmitting end; and the receiving end performs the channel estimation and decoding of the data steam retransmitted by the transmitting end according to the second pilot frequency pattern. The invention also discloses a device for implementing the method.
Description
Technical field
The present invention relates to the computer and the communications field, particularly relate to mixed automatic retransferring method and device.
Background technology
At present, become when overcoming wireless mobile channel and multipath fading to the influence of signal, better recovering signal, receiving terminal carries out channel estimating according to pilot signal, thereby obtains than the accurate data signal.
Yet, when the channel estimating of carrying out according to pilot signal has deviation, possibly can't decode data-signal.For addressing this problem, wireless communication system can adopt based on forward error correction (Forward Error Correction, FEC) and automatically retransmit that (error rate that reduces system is to guarantee communication quality for Automatic Repeat Request, mistake control method such as ARQ).Though the time delay that the FEC scheme produces is less, the coding redundancy that exists has reduced the throughput of system; Though there is not coding redundancy in ARQ, but produced bigger time delay, be unsuitable for real-time service, in order to overcome both shortcomings, these two kinds of methods are mixed automatic request retransmission (HARQ) scheme in conjunction with just having produced: transmitting terminal at first sends to receiving terminal with the packet behind the modulating-coding, receiving terminal carries out error correction decoding to the information of receiving, if can correctly finish decoding, then to the correct sign (ACK) that receives of transmitting terminal feedback, do not need to retransmit, if can not correctly decode, then feedback error receives sign (NACK), by this information requirements transmitting terminal data retransmission.The HARQ technology can improve the performance of system, and adjusts chip rate neatly.
But, in present repeating method, although the primary signal code check of Chong Chuaning may change each time, but the density of pilot signal is that quantity and position are all constant, therefore it is constant for the time domain decline and the frequency decline estimation mode of channel to retransmit the back pilot tone, thereby causes the accuracy of channel estimating not to be improved.
Summary of the invention
The embodiment of the invention provides a kind of mixed automatic retransferring method and device, is used to improve the reliability of transmission.
A kind of implementation method of mixing transmitting terminal in the automatic re-transmission may further comprise the steps:
Transmitting terminal carries out the subcarrier mapping according to first pilot frequency design to pilot tone, and data are carried out the subcarrier mapping, and sends pilot tone and data after the mapping;
Transmitting terminal carries out subcarrier according to second pilot frequency design to pilot tone and shines upon when receiving that mistake receives sign, and data are carried out the subcarrier mapping again, and the data after pilot tone after the transmission mapping and the re-transmission mapping.
A kind of implementation method of mixing receiving terminal in the automatic re-transmission may further comprise the steps:
Receiving terminal parses pilot tone and carries out channel estimating and decoding according to first pilot frequency design from the data flow of receiving;
Receiving terminal sends the wrong sign that receives to transmitting terminal under the situation of decoding failure;
Receiving terminal parses pilot tone and carries out channel estimating and decoding from the data flow that retransmits according to second pilot frequency design.
A kind of transmitting end equipment comprises:
Mapping block is used for according to first pilot frequency design pilot tone being carried out the subcarrier mapping, and data is carried out the subcarrier mapping, when receiving that wrong reception identifies, according to second pilot frequency design pilot tone is carried out the subcarrier mapping, and data is carried out the subcarrier mapping again;
Interface module is used to send pilot tone and data after the mapping, and receives the wrong sign that receives, and the data after sending the pilot tone after the mapping and retransmitting mapping.
A kind of receiving device comprises:
Decoder module is used for parsing pilot tone and carrying out channel estimating and decoding from the data flow of receiving according to first pilot frequency design, and parses pilot tone and carry out channel estimating and decoding from the data flow that retransmits according to second pilot frequency design;
Interface module is used under the situation according to first pilot frequency design decoding failure, sends the wrong sign that receives to transmitting terminal, and receives the data flow that retransmits.
The embodiment of the invention adopts different pilot frequency designs that pilot tone is mapped to subcarrier, thereby has improved the reliability of transmission in mixing the head biography and retransmission processes that retransmits automatically, has reduced the error rate, has reduced number of retransmissions, has saved Internet resources.
Description of drawings
Fig. 1 is the implementation method flow chart that mixes transmitting terminal in the re-transmission automatically in the embodiment of the invention;
Fig. 2 is the implementation method flow chart that mixes receiving terminal in the re-transmission automatically in the embodiment of the invention;
Fig. 3 mixes the method flow diagram of automatic re-transmission for the pilot frequency design of transmitting terminal in the embodiment of the invention and receiving terminal configuration;
Fig. 4 is the schematic diagram of pilot frequency design in the embodiment of the invention;
Fig. 5 for transmitting terminal in the embodiment of the invention and receiving terminal through consultation mode determine the method flow diagram that the mixing of pilot frequency design retransmits automatically;
Fig. 6 is the schematic diagram of channel quality level and pilot frequency design in the embodiment of the invention;
Fig. 7 is for determining the flow chart of the mixed automatic retransferring method of pilot frequency design according to different business in the embodiment of the invention;
Fig. 8 is the schematic diagram of the pilot frequency design of embodiment of the invention high speed business;
Fig. 9 is the schematic diagram of the pilot frequency design of low speed business in the embodiment of the invention;
Figure 10 is the flow chart of the mixed automatic retransferring method of mimo system in the embodiment of the invention;
Figure 11 is the structure chart of transmitting end equipment in the embodiment of the invention;
Figure 12 is the detailed structure view of transmitting end equipment in the embodiment of the invention;
Figure 13 is the structure chart of receiving device in the embodiment of the invention;
Figure 14 is the detailed structure view of receiving device in the embodiment of the invention.
Embodiment
The embodiment of the invention adopts different pilot frequency designs to carry out pilot tone mapping and channel estimating, thereby has improved accuracy of channel estimation in the process that head passes and data retransmission flows, and has reduced the error rate, has improved the reliability and the data transmission efficiency of transmission.
In the mixing retransmission processes of present embodiment, transmitting terminal and receiving terminal are all improved, introduce to mix the implementation procedure of transmitting terminal and receiving terminal in the retransmission processes below respectively.
Referring to Fig. 1, the implementation method flow process of mixing transmitting terminal in the re-transmission automatically in the present embodiment is as follows:
Step 101: transmitting terminal carries out the subcarrier mapping according to first pilot frequency design to pilot tone, and data are carried out the subcarrier mapping, and sends pilot tone and data after the mapping.
Step 102: transmitting terminal receives that the mistake that receiving terminal sends receives sign (NACK).
Step 103: transmitting terminal carries out the subcarrier mapping according to second pilot frequency design to pilot tone, and data are carried out the subcarrier mapping again, and the data after sending the pilot tone after the mapping and retransmitting mapping.
Referring to Fig. 2, the implementation method flow process of mixing receiving terminal in the re-transmission automatically in the present embodiment is as follows:
Step 201: receiving terminal parses pilot tone and carries out channel estimating and decoding according to first pilot frequency design from the data flow of receiving.
Step 202: receiving terminal sends the wrong sign that receives to transmitting terminal under the situation of decoding failure.
Step 203: receiving terminal parses pilot tone and carries out channel estimating and decoding from the data flow that retransmits according to second pilot frequency design.
Receiving terminal sends the correct sign (ACK) that receives to transmitting terminal under the correct situation of decoding.After transmitting terminal is received correct reception sign, continue pilot tone to be mapped to subcarrier and transmission according to first pilot frequency design.Receiving terminal also continues according to first pilot frequency design data flow of receiving to be carried out channel estimating and decoding.
Transmitting terminal and receiving terminal synchronous applications first pilot frequency design and second pilot frequency design then need default mechanism or negotiations process and guarantee this synchronizing process in the present embodiment.Multiple specific implementation is arranged, as first kind of mode: be configured at transmitting terminal and receiving terminal, dispose the identical pilot frequency design set and the selecting sequence of pilot frequency design.Transmitting terminal and receiving terminal according to the selecting sequence of configuration, are selected pilot frequency design synchronously from the pilot frequency design set, and carry out pilot tone mapping and channel estimating respectively.As the second way: the upper layer network unit sends signaling to transmitting terminal and receiving terminal, and this signaling comprises the set (or set of the sign of pilot frequency design) of pilot frequency design and the selecting sequence of pilot frequency design.Transmitting terminal and receiving terminal according to the selecting sequence of configuration, are selected pilot frequency design synchronously from the pilot frequency design set, and carry out pilot tone mapping and channel estimating respectively.The upper layer network unit is the equipment on upper strata, base station in the communication system, can be base station, trunking, base station controller, access service network, connection service network or core net gateway etc.As the third mode: transmitting terminal or receiving terminal are selected pilot frequency design according to the value of current channel quality, and carry out pilot tone mapping or channel estimating, and the pilot frequency design of selecting (or sign of pilot frequency design) is notified to the opposite end.Introduce implementation procedure in detail below by two embodiment.
Referring to Fig. 3, the flow process that the pilot frequency design that transmitting terminal and receiving terminal dispose in the present embodiment mixes automatic re-transmission is as follows:
Step 301: transmitting terminal is selected first pilot frequency design according to the pilot frequency design set of configuration and the selecting sequence of pilot frequency design from the pilot frequency design set.This configuration can be a default configuration, also can be that the upper layer network unit is configured by signaling.This signaling can be that broadcast also can be a unicast messages etc.
Step 302: transmitting terminal is mapped to subcarrier according to first pilot frequency design with pilot tone.Pilot sub-carrier after the mapping is referring to shown in 401 among Fig. 4.
Step 303: transmitting terminal arrives subcarrier with data map.Data subcarrier after the mapping can be referring to shown in 401 among Fig. 4.
Step 304: transmitting terminal sends the data flow that comprises pilot tone and data by subcarrier to receiving terminal.
Step 305: after receiving terminal is received data flow,, from the pilot frequency design set, select first pilot frequency design according to the pilot frequency design set of configuration and the selecting sequence of pilot frequency design.
Step 306: receiving terminal parses pilot tone and carries out channel estimating and decoding according to first pilot frequency design.
Step 307: receiving terminal then sends ACK to transmitting terminal if decode successfully.Transmitting terminal continues to send follow-up data flow according to first pilot frequency design.
Step 308: receiving terminal is if the decoding failure then sends NACK to transmitting terminal.
Step 309: after transmitting terminal is received NACK,, from the pilot frequency design set, select second pilot frequency design according to the pilot frequency design set of configuration and the selecting sequence of pilot frequency design.
Step 310: transmitting terminal is mapped to subcarrier according to second pilot frequency design with pilot tone, and the data that will transmit last time are remapped to subcarrier.Pilot sub-carrier after the mapping is referring to shown in 402 among Fig. 4.The data of this transmission can be data whole of last time transmission, can be the data that receiving terminal can't be decoded also, are the part of the data of transmitting last time.
Step 311: transmitting terminal retransmits the data flow that comprises pilot tone and data.
Step 312: after receiving terminal is received data flow,, from the pilot frequency design set, select second pilot frequency design according to the pilot frequency design set of configuration and the selecting sequence of pilot frequency design.
Step 313: receiving terminal parses pilot tone and carries out channel estimating and decoding according to second pilot frequency design.
The pilot frequency design set comprises that at least two pilot frequency designs get final product in the present embodiment, and Fig. 4 provides 4 pilot frequency designs.If receiving terminal is decoded to the data flow that retransmits for the first time and failed, then transmitting terminal continues to carry out the pilot tone mapping according to the 3rd pilot frequency design (shown in 403 among Fig. 4), and data retransmission flows for the second time.If receiving terminal is to the data flow decoding failure of re-transmission for the second time, then transmitting terminal continues to carry out the pilot tone mapping according to the 4th pilot frequency design (shown in 404 among Fig. 4), and data retransmission flows for the third time.If the number of times that retransmits surpasses 3 times, then transmitting terminal can shine upon and carry out the 4th re-transmission once more according to first pilot frequency design, promptly repeats selecting sequence, and scheme is not limited thereto also reconfigurable selecting sequence certainly.If decoding is correct after retransmitting for the first time, then transmitting terminal can carry out the pilot tone mapping according to first pilot frequency design or second pilot frequency design, and transmits follow-up data flow.
By the 401-404 among Fig. 4 as can be seen, the pilot frequency design that present embodiment provides has increased pilot number, thereby has further improved accuracy of channel estimation in the conversion pilot frequency locations, and then has improved the reliability of transmission.
Referring to Fig. 5, in the present embodiment transmitting terminal and receiving terminal through consultation mode determine that the method flow that the mixing of pilot frequency design automatically retransmits is as follows:
Step 501: transmitting terminal is mapped to subcarrier according to first pilot frequency design of default configuration with pilot tone.
Step 502: transmitting terminal arrives subcarrier with data map.
Step 503: transmitting terminal sends the data flow that comprises pilot tone and data by subcarrier to receiving terminal.
Step 504: after receiving terminal is received data flow, parse pilot tone and carry out channel estimating and decoding according to first pilot frequency design of default configuration.
Step 505: receiving terminal then sends ACK to transmitting terminal if decode successfully.Transmitting terminal continues to send follow-up data flow according to first pilot frequency design.
Step 506: receiving terminal is if the value of the channel quality that measurements and calculations are current is failed in decoding.Channel quality comprise channel quality indication (Channel Quality Information, CQI) or channel condition information (Channel State Information, CSI) etc.
Step 507: receiving terminal is determined second pilot frequency design according to value and the value of channel quality and the corresponding relation of pilot frequency design of current channel quality.Present embodiment is divided into 8 grades (0～7) according to the scope of the value of channel quality with channel quality, and grade is low more, shows that channel quality is good more, and corresponding pilot number is few more.The corresponding relation of channel grade and pilot frequency design can be referring to shown in Figure 6, and Fig. 6 provides 8 pilot frequency designs (601～608).
Step 508: receiving terminal sends NACK and the signaling that carries the sign of second pilot frequency design to transmitting terminal.
Step 509: after transmitting terminal is received NACK and signaling, from signaling, parse the sign of second pilot frequency design, and pilot tone is mapped to subcarrier, and the data that will transmit last time are remapped to subcarrier according to second pilot frequency design.
Step 510: transmitting terminal retransmits the data flow that comprises pilot tone and data.
Step 511: after receiving terminal is received data flow, parse pilot tone and carry out channel estimating and decoding according to second pilot frequency design.
Wherein, transmitting terminal can directly not adopt second pilot frequency design after receiving NACK.Transmitting terminal can also further be determined pilot frequency design according to the current channel quality of receiving terminal feedack measurements and calculations, relatively whether the pilot frequency design of Que Dinging is consistent with second pilot frequency design, if it is inconsistent, then by sending the signaling of the sign carry pilot frequency design to receiving terminal, the sign of the pilot frequency design determined is sent to receiving terminal.Receiving terminal is determined pilot frequency design according to the sign in the signaling of receiving, and carries out channel estimating and decoding.If transmitting terminal and receiving terminal are respectively base station and terminal equipment, the base station sign that can carry pilot frequency design in the signaling in control then, terminal equipment can carry the sign of pilot frequency design in feedback signaling.
Present embodiment is determined pilot frequency design according to channel quality, more meets objective circumstances, determines the proper pilot pattern faster, reduces the mortality of decoding, improves the reliability of transmission.Embodiment shown in Figure 3 attempts new pilot frequency design again and again, compares with embodiment shown in Figure 3, can reduce the number of times of re-transmission.
Preferable, receiving terminal is under the situation of decoding failure, transmitting terminal is judged the channel quality characteristic according to the value of the channel quality that obtains, the channel quality characteristic comprises time domain decline and frequency domain decline two big characteristics, if the channel time domain fading characteristic is more serious than the frequency domain decline, then second pilot frequency design of transmitting terminal employing increases to some extent than pilot tone quantity on frequency domain of first pilot frequency design; If channel frequency domain fading characteristic is more obvious than the time domain decline, then second pilot frequency design of transmitting terminal employing increases to some extent than pilot tone quantity on time domain of first pilot frequency design.Can be by the value of the current channel quality of receiving terminal measurements and calculations, and the value of channel quality is sent to transmitting terminal by feedback channel, also can be by the value of the current channel quality of transmitting terminal measurements and calculations.
The conversion of pilot frequency design comprises the conversion of pilot frequency locations and/or the conversion of pilot number.Different business may be different to the requirement of transmission rate, if the conversion of pilot frequency design can adapt to the requirement of different business, then can improve the reliability of transmission under the situation that does not influence transmission rate substantially.
Referring to Fig. 7, determine that according to different business the realization flow of mixed automatic retransferring method of pilot frequency design is as follows in the present embodiment:
Step 701: transmitting terminal is mapped to subcarrier according to first pilot frequency design of default configuration with pilot tone.
Step 702: transmitting terminal arrives subcarrier with data map.
Step 703: transmitting terminal sends the data flow that comprises pilot tone and data by subcarrier to receiving terminal.
Step 704: after receiving terminal is received data flow, parse pilot tone and carry out channel estimating and decoding according to first pilot frequency design of default configuration.
Step 705: receiving terminal then sends ACK to transmitting terminal if decode successfully.Transmitting terminal continues to send follow-up data flow according to first pilot frequency design.
Step 706: receiving terminal is if the decoding failure sends NACK to transmitting terminal.
Step 707: after transmitting terminal is received NACK, determine the pilot frequency design set according to the type of service under the data, and therefrom select second pilot frequency design.Type of service comprises high speed business and low speed business, and the transmission rate that high speed business requires is higher than the transmission rate of low speed business need.If belong to high speed business, then transmitting terminal is selected second pilot frequency design from first pilot set (referring to shown in Figure 8); If belong to the low speed business, then transmitting terminal is selected second pilot frequency design from second pilot set (referring to shown in Figure 9), and carries out the pilot tone mapping.Wherein, the pilot number of each pilot frequency design is constant in first pilot set, the pilot frequency locations conversion.The pilot number of each pilot frequency design increases gradually in second pilot set.
Step 708: transmitting terminal is mapped to subcarrier according to second pilot frequency design with pilot tone, and the data that will transmit last time are remapped to subcarrier.
Step 709: transmitting terminal retransmits the data flow that comprises pilot tone and data.
Step 710: after receiving terminal is received data flow, determine the pilot frequency design set according to the type of service under the data, and therefrom select second pilot frequency design.Receiving terminal can be known type of service under the data by the header of data flow.
Step 711: receiving terminal parses pilot tone and carries out channel estimating and decoding according to second pilot frequency design.
Above embodiment mainly is applicable to the scene of single antenna transmissions, in the automatic retransmission processes of mixing of multiple-input, multiple-output (MIMO) system, still can adopt the mode of pilot tone conversion to improve the reliability of transmission.
Referring to Figure 10, the realization flow of the mixed automatic retransferring method of mimo system is as follows in the present embodiment:
Being received as example with two antennas of two antenna transmission below describes.
Step 1001: transmitting terminal is mapped to pilot tone the two-way pilot sub-carrier respectively according to two kinds of pilot frequency designs in the set of first pilot frequency design.
Step 1002: transmitting terminal is mapped to the two paths of data subcarrier respectively with data.
Step 1003: transmitting terminal comprises the first via data flow of data subcarrier and pilot sub-carrier by first antenna transmission, and second circuit-switched data stream that comprises data subcarrier and pilot sub-carrier by second antenna transmission.
Step 1004: receiving terminal is received first data flow and second data flow by two antennas.
Step 1005: receiving terminal parses pilot tone and carries out channel estimating and decoding from two paths of data stream respectively according to two kinds of pilot tones in the set of first pilot frequency design.
Step 1006: receiving terminal sends NACK under the situation of at least one circuit-switched data stream decoding failure, otherwise sends ACK.
Step 1007: after transmitting terminal is received NACK, respectively pilot tone is mapped to the two-way pilot sub-carrier according to two kinds of pilot frequency designs in the set of second pilot frequency design.The quantity of pilot frequency design was consistent with the quantity of antenna during first pilot frequency design set and second pilot frequency design were gathered.That is, be arranged on the pilot frequency design that carries out repeatedly adopting in the pilot tone mapping process for every antenna in advance; Wherein, when take place retransmitting, have at least the pilot tone mapping graph case of an antenna to change, and many antennas adopt different pilot frequency designs in carrying out pilot tone mapping process.
Step 1008: transmitting terminal is mapped to the two paths of data subcarrier respectively with data.
Step 1009: transmitting terminal retransmits first data flow and second data flow.
Step 1010: receiving terminal is received first data flow and second data flow by two antennas.
Step 1011: receiving terminal parses pilot tone and carries out channel estimating and decoding from two paths of data stream respectively according to two kinds of pilot tones in the set of second pilot frequency design.
Understood the method flow that mixes automatic re-transmission by the pilot tone conversion by above description, this method is realized by transmitting terminal and receiving terminal.Structure to transmitting terminal and receiving terminal is introduced below.
Referring to Figure 11, transmitting end equipment comprises mapping block 1101 and interface module 1102 in the present embodiment.Transmitting end equipment can be base station, relay station or subscriber equipment etc.
Transmitting end equipment also comprises selects module 1103 and business module 1104, referring to shown in Figure 12.
Referring to Figure 13, receiving device comprises decoder module 1301 and interface module 1302 in the present embodiment.Receiving device can be base station, relay station or subscriber equipment etc.
Receiving device also comprises generation module 1305, selects module 1303 and business module 1304, referring to shown in Figure 14.
The signaling that generation module 1305 is used to generate ACK, NACK and carries the sign of pilot frequency design.Select module 1303 to be used for selecting pilot frequency design from the pilot frequency design set.Business module 1304 is used for specified data, and to belong to high speed business still be the low speed business.
Be used to realize that the software of the embodiment of the invention can be stored in storage mediums such as floppy disk, hard disk, CD and flash memory.
The embodiment of the invention adopts different pilot frequency designs that pilot tone is mapped to subcarrier, thereby has improved the reliability of transmission in mixing the head biography and retransmission processes that retransmits automatically, has reduced the error rate, has reduced number of retransmissions, has saved Internet resources.And the embodiment of the invention provides the implementation of multiple choices pilot frequency designs, makes realization more flexible, wherein determine pilot frequency design according to channel quality, the actual conditions that more meet network, effective choice further improve the reliability of transmission than the proper pilot pattern.The embodiment of the invention is also selected suitable pilot frequency design according to different types of service, improves the reliability of transmission under the situation that does not influence transmission rate.Simultaneously, the embodiment of the invention provides the solution of mixing automatic re-transmission in mimo system by the pilot tone conversion, has improved the transmission reliability in the mimo system.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (14)
1. a method that realizes mixing automatic re-transmission at transmitting terminal is characterized in that, may further comprise the steps:
Transmitting terminal carries out the subcarrier mapping according to first pilot frequency design to pilot tone, and data are carried out the subcarrier mapping, and first pilot tone and the data that pass after shining upon;
Transmitting terminal carries out subcarrier according to second pilot frequency design to pilot tone and shines upon when receiving that mistake receives sign, and data are carried out the subcarrier mapping again, and the data after pilot tone after the transmission mapping and the re-transmission mapping.
2. the method for claim 1, it is characterized in that, before pilot tone being carried out the subcarrier mapping according to second pilot frequency design, transmitting terminal is selected first pilot frequency design and second pilot frequency design according to the selecting sequence of set of the pilot frequency design in the default configuration and pilot frequency design; Perhaps
The signaling that transmitting terminal sends by the upper layer network unit obtains the selecting sequence of pilot frequency design set and pilot frequency design, and when needs are mapped to subcarrier with pilot signal, selects first pilot frequency design and second pilot frequency design; Perhaps
Transmitting terminal is selected first pilot frequency design according to default configuration, and the sign that parses pilot frequency design from the signaling of the sign received and carry pilot frequency design, and selection second pilot frequency design corresponding with the sign of pilot frequency design; Perhaps
Transmitting terminal is selected first pilot frequency design according to default configuration, and receives in the mistake received under the situation of sign, and the value of the channel quality that feeds back according to receiving terminal is selected second pilot frequency design.
3. method as claimed in claim 2 is characterized in that, when selecting second pilot frequency design according to the value of channel quality, transmitting terminal sends to receiving terminal by sending signaling with the sign of second pilot frequency design.
4. as claim 1,2 or 3 described methods, it is characterized in that when described data belonged to first kind business, second pilot frequency design was identical with the pilot number of first pilot frequency design, the pilot frequency locations difference;
When described data belonged to second class business, the pilot number in second pilot frequency design was higher than the pilot number in first pilot frequency design;
Wherein, the transmission rate of first kind business need is higher than the transmission rate of the second class business need.
5. as claim 1,2 or 3 described methods, it is characterized in that transmitting terminal was determined second pilot frequency design according to the fading characteristic of channel before pilot tone being carried out the subcarrier mapping according to second pilot frequency design.
6. the method for claim 1, it is characterized in that, the data of transmitting terminal after retransmitting mapping are received wrong the reception when identifying once more, according to the 3rd pilot frequency design or first pilot frequency design pilot tone is carried out the subcarrier mapping, and data are carried out the subcarrier mapping again.
7. the method for claim 1, it is characterized in that, when transmitting terminal adopts many antenna transmission pilot tones and data, transmitting terminal is in head biography process, according to a plurality of pilot frequency designs in first pilot frequency design set that comprises first pilot frequency design pilot tone is carried out the subcarrier mapping, in retransmission processes, pilot tone is carried out the subcarrier mapping according to a plurality of pilot frequency designs in second pilot frequency design set that comprises second pilot frequency design; The quantity of pilot frequency design was consistent with the quantity of antenna during wherein first pilot frequency design set and second pilot frequency design were gathered.
8. a method that realizes mixing automatic re-transmission at receiving terminal is characterized in that, may further comprise the steps:
Receiving terminal parses pilot tone and carries out channel estimating and decoding according to first pilot frequency design from the data flow of receiving;
Receiving terminal sends the wrong sign that receives to transmitting terminal under the situation of decoding failure;
Receiving terminal parses pilot tone and carries out channel estimating and decoding from the data flow that retransmits according to second pilot frequency design.
9. implementation method as claimed in claim 8 is characterized in that, also comprises step: receiving terminal is selected first pilot frequency design and second pilot frequency design according to the selecting sequence of set of the pilot frequency design in the default configuration and pilot frequency design; Perhaps
The signaling that receiving terminal sends by the upper layer network unit obtains the selecting sequence of pilot frequency design set and pilot frequency design, and when needs carry out channel estimating and decoding, selects first pilot frequency design and second pilot frequency design; Perhaps
Receiving terminal is selected first pilot frequency design according to default configuration, and the sign that parses pilot frequency design from the signaling of the sign received and carry pilot frequency design, and selection second pilot frequency design corresponding with the sign of pilot frequency design; Perhaps
Receiving terminal is selected first pilot frequency design according to default configuration, and selects second pilot frequency design according to current channel quality.
10. implementation method as claimed in claim 9 is characterized in that, when selecting second pilot frequency design according to the value of channel quality, receiving terminal sends to transmitting terminal by signaling with the sign of second pilot frequency design.
11. implementation method as claimed in claim 8 is characterized in that, when described data belonged to first kind business, second pilot frequency design was identical with the pilot number of first pilot frequency design, the pilot frequency locations difference;
When described data belonged to second class business, the pilot number in second pilot frequency design was higher than the pilot number in first pilot frequency design;
Wherein, the transmission rate of first kind business need is higher than the transmission rate of the second class business need.
12. implementation method as claimed in claim 8, it is characterized in that, receiving terminal is under the situation that the data flow decoding that retransmits is failed, send wrong the reception to transmitting terminal once more and identify, and the data flow that transmitting terminal retransmits is once more carried out channel estimating and decoding according to the 3rd pilot frequency design or first pilot frequency design.
13. a transmitting end equipment is characterized in that, comprising:
Mapping block, be used for pilot tone being carried out the subcarrier mapping, and data are carried out the subcarrier mapping, when receiving that wrong reception identifies according to first pilot frequency design, according to second pilot frequency design pilot tone is carried out the subcarrier mapping, and data are carried out the subcarrier mapping again;
Interface module is used to send pilot tone and data after the mapping, and receives the wrong sign that receives, and the data after sending the pilot tone after the mapping and retransmitting mapping.
14. a receiving device is characterized in that, comprising:
Decoder module is used for parsing pilot tone and carrying out channel estimating and decoding from the data flow of receiving according to first pilot frequency design, and parses pilot tone and carry out channel estimating and decoding from the data flow that retransmits according to second pilot frequency design;
Interface module is used under the situation according to first pilot frequency design decoding failure, sends the wrong sign that receives to transmitting terminal, and receives the data flow that retransmits.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101429070A CN101888289A (en) | 2009-05-13 | 2009-05-13 | Hybrid automatic retransmission method and device |
| PCT/CN2010/072570 WO2010130187A1 (en) | 2009-05-13 | 2010-05-10 | Hybrid automatic repeat request method and apparatus |
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| CN2009101429070A CN101888289A (en) | 2009-05-13 | 2009-05-13 | Hybrid automatic retransmission method and device |
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| CN101888289A true CN101888289A (en) | 2010-11-17 |
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| WO2013067680A1 (en) * | 2011-11-08 | 2013-05-16 | Telefonaktiebolaget L M Ericsson (Publ) | Methods for performing and controlling retransmission and apparatus thereof |
| WO2016161919A1 (en) * | 2015-04-10 | 2016-10-13 | 华为技术有限公司 | Csi measurement and feedback method and device |
| CN108512633A (en) * | 2017-02-28 | 2018-09-07 | 华为技术有限公司 | A kind of data transmission method and device |
| CN109075891A (en) * | 2016-04-01 | 2018-12-21 | 华为技术有限公司 | Pilot aided exempts to authorize the identifying system and method for uplink |
| WO2022048637A1 (en) * | 2020-09-04 | 2022-03-10 | 维沃移动通信有限公司 | Pilot frequency processing method and related device |
| CN114696853A (en) * | 2022-03-02 | 2022-07-01 | 福建红杉融创科技有限公司 | High-concurrency low-delay distributed 5G message sending system |
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| US10382169B2 (en) | 2016-04-01 | 2019-08-13 | Huawei Technologies Co., Ltd. | HARQ systems and methods for grant-free uplink transmissions |
| CN107888326B (en) * | 2016-09-30 | 2021-01-29 | 华为技术有限公司 | Data transmission method and device |
| US10673593B2 (en) | 2016-11-03 | 2020-06-02 | Huawei Technologies Co., Ltd. | HARQ signaling for grant-free uplink transmissions |
| CN114629610A (en) * | 2020-12-11 | 2022-06-14 | 维沃移动通信有限公司 | Pilot frequency transmission method, device, network side equipment and storage medium |
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| WO2013067680A1 (en) * | 2011-11-08 | 2013-05-16 | Telefonaktiebolaget L M Ericsson (Publ) | Methods for performing and controlling retransmission and apparatus thereof |
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| CN114696853A (en) * | 2022-03-02 | 2022-07-01 | 福建红杉融创科技有限公司 | High-concurrency low-delay distributed 5G message sending system |
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| WO2010130187A1 (en) | 2010-11-18 |
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