CN1925383A - Data packet retransmitting method and transmitting device and retransmitting system - Google Patents
Data packet retransmitting method and transmitting device and retransmitting system Download PDFInfo
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- CN1925383A CN1925383A CN 200610111217 CN200610111217A CN1925383A CN 1925383 A CN1925383 A CN 1925383A CN 200610111217 CN200610111217 CN 200610111217 CN 200610111217 A CN200610111217 A CN 200610111217A CN 1925383 A CN1925383 A CN 1925383A
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Abstract
This invention discloses one data package sending method, which uses re-send times as data package as signal quality base for power sending adjusting. This invention provides relative data send device and re-send system and adopts receive ends demands to feedback data package to save feedback signal channel materials to process measurement judge operation to improve data transmission efficiency.
Description
Technical field
The present invention relates to communication technique field, be specifically related to a kind of packet retransmission technique.
Background technology
In digital communication technology, the validity and the reliability that improve message transmission are one of target of constantly pursuing all the time.Error coding comprises error correcting code and error detection code etc., is a kind of at the important technology of thanksing for your hospitality channel realization reliable communication, and in digital communication system, the mode of utilizing error coding to carry out error control mainly comprises following several:
One, automatic repeat requests (ARQ:Automatic Repeat Query)
Its system schematic as shown in Figure 1.In the ARQ communication system, when adopting decoding, transmitting terminal can find the to a certain degree simple code method of mistake, it is the error detection code technology, for example: parity check code, cyclic redundancy check (CRC) code (CRC:Cyclic Redundancy Check) etc., the data that information source need be transmitted are encoded, make in data, to have added a spot of supervise code element.Distortion has taken place through after the Channel Transmission in coded data, and receiving terminal carries out error detection decoding according to coding rule to the code signal that receives.If verification is correct, then by feedback channel notice transmitting terminal, this packet correctly receives, and can send next packet, and gives the stay of two nights the correct data packet delivery that receives; If verification failure, then by feedback channel notice transmitting terminal, this packet can not correctly receive, and needs to retransmit current bag, and is error-free or finish maximum retransmission until verification.
Two, forward error control (FEC:Forward Error Control)
Its system schematic as shown in Figure 2.In the FEC communication system, when adopting decoding, can correct transmitting terminal the to a certain degree complicated coding method of transmission error, i.e. error-correcting code technique, for example: convolution code, Turbo code etc., data to the needs transmission are encoded, and make to have added certain redundancy symbol in data.Distortion has taken place through behind the channel in coded data, and receiving terminal carries out error-correcting decoding according to coding rule to the code signal that receives, when error code number within the specific limits the time, not only can find error code wherein, can also correct error code, make it possible to the correct data that send that receive.
Three, mix automatic repeat requests (HARQ:Hybrid Automatic Repeat Request)
Its system schematic as shown in Figure 3.HARQ system synthesis the advantage of ARQ and FEC, be one of key technology in the Modern Mobile Communications Systems.In the HARQ communication system, transmitting terminal is divided into two parts to the cataloged procedure of data: at first utilize the error detection code technology to encode to sending data, obtain the error detection coding data; Utilize error-correcting code technique that the error detection coding data are encoded then, obtain channel-encoded data.After receiving terminal was received channel-encoded data, the process that data are deciphered also was divided into two parts: at first utilize the error correcting code coding rule to carry out error-correcting decoding, correct mistake wherein as far as possible; Utilize the error detection code coding rule to carry out error detection decoding then.If verification is correct, illustrate that then error correcting code corrected all error codes, do not need to retransmit, this moment, this packet correctly received, and can send next packet by feedback channel notice transmitting terminal; If the verification failure illustrates that then the data distortion of receiving is more serious, error correcting code can not be corrected all error codes fully, this moment is by feedback channel notice transmitting terminal, this packet can not correctly receive, and need to retransmit current bag, and is error-free or finish maximum retransmission until verification.
In above-mentioned ARQ with retransmission mechanism, HARQ system, its emission parameter, for example transmitting power, maximum retransmission, re-transmission content etc. all adopt the value that pre-sets.Just retransmit after the feedback signal of receiving the verification failure, employed channel quality is not followed the tracks of, this can bring certain defective.For example,, when channel condition is good, illustrates that transmitting power has surpassed receiving terminal and effectively received desired power, but still adopt former power to send, wasted transmitting power, also increased interference other subscriber signal for transmit power parameter; When channel condition is relatively poor, can not improve power and send, need repeatedly to retransmit, just can finish reception, even still have big error code during the maximum retransmission that arrive to be provided with, and increased propagation delay time, the demanding business of some real-times has been caused bigger influence.And the re-transmission of more number of times has also reduced the throughput of system.
For solving this difficulty, the HARQ system that proposes to carry out channel-quality feedback is also arranged, as shown in Figure 4.In this improved system, the Carrier interference ratio in receiving terminal measurement received signal recently characterizes channel quality with carrier-in-interference, and Carrier interference ratio is fed back to transmitting terminal with certain form.Transmitting terminal is determined current quality of channel according to the Carrier interference ratio that receives, and on this basis, carries out the adjustment of emission parameter.This defective of improving one's methods need to be receiving terminal to carry out the feedback of channel quality information, has increased the resource overhead of feedback channel, and needs to wait for receiving terminal measurement Carrier interference ratio, can not in time follow the tracks of the variation of channel quality.
Summary of the invention
The object of the present invention is to provide a kind of can be when emission parameter be adjusted, save feedback channel resources, in time follow the tracks of data package retransmission method and the corresponding packet dispensing device and the packet retransmission system of variations.
To achieve the object of the present invention, the technical scheme of being taked is: a kind of data package retransmission method comprises: the packet transmitting terminal carries out packet number of retransmissions statistics; Obtain indication according to the result of described packet number of retransmissions statistics to channel quality; Determine the adjustment amount of emission parameter according to described channel quality indication; Carry out the transmission of next packet with adjusted emission parameter.
Described emission parameter can comprise the length of transmitting power, constellation order, re-transmission redundant information.
Preferably, the statistics of described packet number of retransmissions comprises: the packet transmitting terminal receives the feedback signal of packet receiving terminal to the packet reception condition; Obtain the number of retransmissions of packet according to statistics to described feedback signal.
Described feedback signal can comprise the signal that the expression packet does not correctly receive and confirm the correct signal that receives of packet; Described statistics to feedback signal comprises, when receiving the signal that described expression packet does not correctly receive, the number of retransmissions of this packet added one; When receiving the signal of the correct reception of described affirmation packet, obtain current data packet number of retransmissions statistics.
Preferably, described result according to packet number of retransmissions statistics obtains the indication of channel quality is comprised: the number of retransmissions of current data packet and the number of retransmissions of at least one packet are before averaged, obtain average repeat time; According to the definite indication of described average repeat time to channel quality.Can preferably adopt the mode of Alpha's filtering to carry out the number of retransmissions of current data packet and number of retransmissions average of at least one before.
Further preferably, describedly determine the indication of channel quality is comprised: described average repeat time is quantized, carry out correspondingly, obtain corresponding channel quality indication with channel quality indication with several grades according to average repeat time.
The present invention also provides a kind of packet dispensing device, comprises emission parameter adjusting module and channel quality measurement module; Described channel quality measurement module receives the feedback signal that packet sends, and carries out packet number of retransmissions statistics, obtains indication to channel quality according to the result of statistics; The adjustment amount that emission parameter is determined in the channel quality indication that described emission parameter adjusting module obtains according to described channel quality measurement module carries out the transmission of packet according to adjusted emission parameter.
Described channel quality measurement module can comprise number of retransmissions statistic unit, statistical average unit and channel quality indicating member; Described number of retransmissions statistic unit receives the feedback signal that packet sends, and carries out packet number of retransmissions statistics, and statistics is sent to described statistical average unit; Described statistical average unit averages the number of retransmissions of current data packet and the number of retransmissions of at least one packet before, obtains average repeat time; Described channel quality indicating member carries out described average repeat time and the channel quality indication with several grades corresponding, obtains corresponding channel quality indication.
Preferably, described channel quality measurement module also comprises quantifying unit, and described statistical average unit is Alpha's mean filter; Described number of retransmissions statistic unit is imported described Alpha's mean filter with the number of retransmissions that each secondary data bag sends successively, and the result of described Alpha's mean filter output Alpha filtering is as average repeat time; Described quantifying unit quantizes described average repeat time, and the average repeat time after quantizing is sent to described channel quality indicating member.
Described emission parameter adjusting module can adopt such structure: comprise parameter adjustment amount acquiring unit, adjustment amount memory cell and transmitter unit; Described parameter adjustment amount acquiring unit receives described channel quality indication, obtains corresponding emission parameter adjustment amount from described adjustment amount memory cell, according to the emission parameter adjustment amount that obtains the emission parameter of described transmitter unit is adjusted; Described transmitter unit carries out the transmission of packet according to adjusted emission parameter.
Above-mentioned packet dispensing device also can comprise error detection coding module and error correction coding module, described error detection coding module and error correction coding module are carried out error detection coding and error correction coding to packet to be sent successively, and the packet after will encoding sends to described emission parameter adjusting module and sends.
The present invention also provides a kind of packet retransmission system, comprises dispensing device and receiving system, and described dispensing device receives the feedback signal of described receiving system; According to described feedback signal the number of retransmissions of packet is added up; Result according to statistics obtains indication to channel quality; Determine the adjustment amount of emission parameter according to described channel quality indication; Carry out the transmission of packet according to adjusted emission parameter; Described receiving system receives the packet that described dispensing device sends, and the reception condition of packet is fed back to described dispensing device.
Preferably, the Carrier interference ratio that described receiving system also will receive packet feeds back to described dispensing device, and described dispensing device obtains indication to channel quality according to the result of described number of retransmissions statistics and described Carrier interference ratio.
Adopt technique scheme, beneficial technical effects of the present invention is:
1) the present invention adopts number of retransmissions that packet transmitting terminal statistics obtains as the foundation of weighing channel quality, thereby carry out the adjustment of transmitted power, receiving terminal only needs the result of feedback data packet verification, saved feedback channel resources, and the measurement decision operation of channel quality is carried out at transmitting terminal, avoided wait to the receiving terminal measurement result, can in time follow the tracks of the variation of channel quality, adjust accordingly, improve data transmission efficiency with emission parameter to transmitting terminal.
2) the present invention preferably adopts the average repeat time of nearest twice or twice above packet transmission as the index corresponding with channel quality, can reduce the influence of the burst disturbance of channel to system, the stability of enhanced system, and preferably adopt the method for Alpha's filtering to obtain average repeat time, system realizes simple, the treatment effeciency height.
Description of drawings
Also the present invention is described in further detail in conjunction with the accompanying drawings below by embodiment.
Fig. 1 is existing ARQ system schematic;
Fig. 2 is existing FEC system schematic;
Fig. 3 is existing HARQ system schematic;
Fig. 4 is existing HARQ system schematic of carrying out channel-quality feedback;
Fig. 5 is the embodiment of the invention one a data package retransmission method schematic flow sheet;
Fig. 6 is the embodiment of the invention two data package retransmission method schematic flow sheets;
Fig. 7 is the embodiment of the invention three packet dispensing device modular structure schematic diagrames;
Fig. 8 is the modular structure schematic diagram that the embodiment of the invention three packet dispensing devices adopt HARQ;
Fig. 9 is the embodiment of the invention four packet dispensing device modular structure schematic diagrames;
Figure 10 is Alpha's mean filter structural representation in the embodiment of the invention four;
Figure 11 is the embodiment of the invention five packet retransmission system modular structure schematic diagrames;
Figure 12 is the schematic diagram that system merges receiving system channel quality measurement scheme among the embodiment five.
Embodiment
The invention provides a kind of data package retransmission method, it as the foundation of weighing channel quality, carries out the adjustment of transmitted power with the number of retransmissions of packet transmitting terminal.The average repeat time that can adopt nearest twice or twice above packet transmission is as the index corresponding with channel quality, and the mean value acquisition methods can adopt Alpha's filtering method.The corresponding grade corresponded manner that adopts quantification of average repeat time and channel quality.Data package retransmission method of the present invention is applicable to the system with retransmission mechanism, and for example ARQ, HARQ etc. can be associated the channel quality indication that obtains to adjust immediately with any emission parameter of desired adjustment.The present invention also provides corresponding packet dispensing device and packet retransmission system.Below respectively the inventive method and device are elaborated.
Embodiment one, a kind of data package retransmission method, flow process comprises as shown in Figure 5:
A1, packet transmitting terminal carry out packet number of retransmissions statistics;
In having the system of retransmission mechanism, after receiving terminal is received the packet of transmitting terminal transmission, can judge whether this packet correctly is received according to the result who separates code check usually, give transmitting terminal with corresponding information feedback then.Feedback signal to check results generally comprises two kinds: the expression packet does not correctly receive the signal of (NACK:Non ACKnowledgment) and confirms that packet correctly receives the signal of (ACK:ACKnowledgment); Transmitting terminal learns promptly that after receiving ack signal the current data packet transmission is successful, can carry out the transmission of next packet; After receiving the NACK signal, promptly learn not success of current data packet transmission, need once retransmit.The concrete content that retransmits is relevant with the system that is adopted, for example, when adopting the ARQ system, re-transmission be the content of transmission last time; When adopting the HARQ system, what retransmit can be the content that transmitted last time, also can be partial content that transmitted last time or the incremental redundancy information that did not send last time etc., specifically retransmit being provided with of content and length and all can be included in to send in the parameter and control.Based on above-mentioned feedback mechanism, the process of carrying out packet number of retransmissions statistics comprises:
A11, packet transmitting terminal receive the feedback signal of packet receiving terminal to the packet reception condition;
A12, judge that whether feedback signal is ack signal, if not, then carries out A13, if then carry out A14;
A13, the number of retransmissions of current data packet is added one, continue to wait for feedback signal next time.
A14, acquisition current data packet number of retransmissions statistics;
The result that A2, basis are added up the packet number of retransmissions obtains the indication to channel quality;
In the actual transmissions environment, have significantly between packet number of retransmissions and the channel quality and get in touch, this also is the fact foundation that the present invention is achieved.Channel quality is good, and the distortion that packet takes place in transmission course and the possibility of error code are just little, and the transmission success rate is just high, and the corresponding retransmission number of times is few naturally; Otherwise, bad channel quality, the number of retransmissions of packet also can increase thereupon; Therefore, can be with the number of retransmissions of packet as the foundation of weighing channel quality.For fear of the influence that the burst disturbance of channel causes, adopting average repeat time is more suitable as the criterion to channel quality, and step comprises:
A21, the number of retransmissions of current data packet and the number of retransmissions of previous or several packets are averaged, obtain average repeat time; Concrete average included statistics number can determine that the number multipotency is enough avoided the influence of bursty interference according to the actual conditions of system, and number has susceptibility preferably to variations at least;
A22, determine promptly, the average repeat time that calculates to be associated indication to channel quality with channel quality according to average repeat time; Usually can adopt hierarchical mode, channel quality is divided into several grades, several grades of average repeat time and this are corresponding, obtain corresponding channel quality indication;
A3, determine the adjustment amount of emission parameter according to the channel quality indication that obtains;
Emission parameter can comprise abundant content, for different retransmission mechanism different concrete manifestations is arranged.For example, for HARQ, can comprise the length of transmitting power, constellation order, re-transmission redundant information etc.With the transmitting power is example, three kinds of typical case of the general existence of the corresponding relation that channel quality and transmitting power are adjusted: the one, and channel quality is good, has surpassed the requirement of correct reception, at this moment can reduce transmitting power; The 2nd, channel quality is very poor, and reception is bad, at this moment can improve transmitting power; The one, channel quality is between preceding two kinds of situations, then can keep original transmitting power constant.Obviously, the channel quality indication that obtains according to average repeat time is possible different in different real systems with the detailed corresponding relation of transmitting power adjustment amount, and concrete setting with system, for example constellation point order of modulation, code rate, antenna radical etc. are relevant, can determine according to experiment and emulation.
A4, carry out the transmission of next packet with adjusted emission parameter; Certainly the feedback signal to next packet that also just begins a new round receives and the statistical operation process.
Embodiment two, a kind of data package retransmission method, flow process comprises as shown in Figure 6:
B11, packet transmitting terminal receive the feedback signal of packet receiving terminal to the packet reception condition;
B12, judge that whether feedback signal is ack signal, if not, then carries out B13, if then carry out B14;
B13, the number of retransmissions of current data packet is added one, continue to wait for feedback signal next time.
B14, acquisition current data packet number of retransmissions statistics;
B21, employing Alpha (α) filtering average the number of retransmissions of current data packet and the number of retransmissions of previous or several packets; Specific practice is that the number of retransmissions statistics of each packet of order transmission is carried out α filtering as input signal, input signal is separated into several earlier, carry out delay in various degree then respectively, the length of delay on each road and the time interval of input signal adapt, again each road signal is weighted merging at last, the weights of each road signal can be equal and summation is 1, unequal weights can certainly be set to reach the effect of emphasizing certain period influence according to the precedence of packet respectively, for example can give near the higher weights of the packet of current time.Because the relation that postpones, the result that signal merges is equivalent to the stack of the some input signals of order, and based on the reason of weighting, and α filtering can be considered average to several signals of order input, the number of concrete average included sequential signal is determined by the way of separating;
B22, the average repeat time of α filtering output is quantized, carry out correspondingly, obtain corresponding channel quality indication with channel quality indication with several grades;
B22, determine promptly, the average repeat time that calculates to be associated indication to channel quality with channel quality according to average repeat time; Usually can adopt hierarchical mode, channel quality is divided into several grades, several grades of average repeat time and this are corresponding, obtain corresponding channel quality indication;
B3, determine the adjustment amount of emission parameter according to the channel quality indication that obtains;
B4, carry out the transmission of next packet with adjusted emission parameter, the feedback signal to next packet of a beginning new round receives and the statistical operation process.
Present embodiment method and embodiment one are basic identical, and difference is to adopt the mode of α filtering to carry out the average of number of retransmissions, and the physics realization of this method can adopt standardized module to finish, and has system and realizes the high advantage of simple process efficient.
Embodiment three, a kind of packet dispensing device as shown in Figure 7, comprise emission parameter adjusting module 11, channel quality measurement module 12; Emission parameter adjusting module 11 comprises parameter adjustment amount acquiring unit 111, adjustment amount memory cell 112 and transmitter unit 113; Channel quality measurement module 12 comprises number of retransmissions statistic unit 121, statistical average unit 122 and channel quality indicating member 123;
Number of retransmissions statistic unit 121 receives the feedback signal to the reception packet that is sent by receiving terminal, comprises ack signal and NACK signal, carries out packet number of retransmissions statistics, and statistics is sent to statistical average unit 122;
Statistical average unit 122 averages the number of retransmissions of current data packet and the number of retransmissions of previous or several packets, obtains average repeat time;
Channel quality indicating member 123 carries out statistical average unit 122 average repeat time that obtains and the channel quality indication with several grades corresponding, obtains corresponding channel quality indication;
The channel quality indication that parameter adjustment amount acquiring unit 111 receive channel quality indicating members 123 provide, from adjustment amount memory cell 112, obtain corresponding emission parameter adjustment amount, the emission parameter of transmitter unit 113 is adjusted according to the emission parameter adjustment amount that obtains;
The concrete adjustment data of storage various emission parameters corresponding in the adjustment amount memory cell 112 with channel qualities at different levels, these data are relevant with being provided with of different system and system self, can obtain with emulation by experiment;
Transmitter unit 113 carries out the transmission of packet according to adjusted emission parameter.
The data package retransmission method that provides among the embodiment one can be provided the packet dispensing device that present embodiment provided.Above-mentioned packet dispensing device can be based on the dispensing device of ARQ retransmission mechanism, also can be based on the dispensing device of HARQ retransmission mechanism, only need to adopt the respective coding module to get final product, to adopt the HARQ retransmission mechanism is example, the modular structure schematic diagram of present embodiment dispensing device also comprises error detection coding module 13 and error correction coding module 14 as shown in Figure 8; Error detection coding module 13 and error correction coding module 14 are carried out error detection coding and error correction coding to packet to be sent successively, and the transmitter unit 113 that the packet after will encoding sends to emission parameter adjusting module 11 sends.
Embodiment four, a kind of packet dispensing device as shown in Figure 9, comprise emission parameter adjusting module 21, channel quality measurement module 22; Emission parameter adjusting module 21 comprises parameter adjustment amount acquiring unit 211, adjustment amount memory cell 212 and transmitter unit 213; Channel quality measurement module 22 comprises number of retransmissions statistic unit 221, Alpha's mean filter 222, quantifying unit 224 and channel quality indicating member 223;
Number of retransmissions statistic unit 221 receives the feedback signal to the reception packet that is sent by receiving terminal, carries out packet number of retransmissions statistics, and statistics is sent to Alpha's mean filter 222 successively;
The packet number of retransmissions of 222 pairs of inputs of Alpha's mean filter carries out Alpha's filtering, and the result is as average repeat time in output filtering; The structural representation of Alpha's mean filter as shown in figure 10, its input is separated into several (for the purpose of clear, two-way has only drawn among Figure 10, the multichannel situation can be analogized), each the road signal that separates does not have the delay except that one the tunnel, all the other are subjected to the effect of time delay unit A to carry out in various degree delay respectively, make that each the road signal that at a time arrives merging place B is respectively the different signal values constantly of initial input signal, situation among corresponding the present invention, be exactly the number of retransmissions of each packet that sends in proper order, for example be respectively the number of retransmissions R (n) of current data packet and the number of retransmissions R (n-1) of last data bag among Figure 10.Carrying out each road signal when merging, each road signal value need be weighted, among Figure 10 two paths of signals R (n) and R (n-1) carry out respectively * α and * weighting of (1-α), α gets 0.5, therefore expression is to the arithmetic average of current data packet and previous packet number of retransmissions.Certainly, as previously mentioned, weighted value also can adopt the method for salary distribution of lack of balance.If the number of retransmissions of more a plurality of packets before wishing to comprise in the mean value increases the way of separating and gets final product, and notes for the time delay unit on each road being set corresponding time of delay;
The average repeat time of 224 pairs of Alpha's mean filters of quantifying unit, 222 outputs quantizes, and the average repeat time after quantizing is sent to channel quality indicating member 223.
After channel quality indicating member 223 quantizes quantifying unit 224 average repeat time and channel quality indication with several grades carry out correspondingly, obtain corresponding channel quality and indicate;
The channel quality indication that parameter adjustment amount acquiring unit 211 receive channel quality indicating members 223 provide, from adjustment amount memory cell 212, obtain corresponding emission parameter adjustment amount, the emission parameter of transmitter unit 213 is adjusted according to the emission parameter adjustment amount that obtains;
Store the concrete adjustment data of the various emission parameters corresponding in the adjustment amount memory cell 212 with channel qualities at different levels;
Transmitter unit 213 carries out the transmission of packet according to adjusted emission parameter.
Present embodiment device and embodiment three are basic identical, and difference is to adopt Alpha's mean filter 222 as the statistical average unit, and the output signal of the 224 pairs of Alpha's mean filters in increase corresponding quantization unit quantizes.The data package retransmission method that provides among the embodiment two can be provided the packet dispensing device that present embodiment provided, and it is identical with device among the embodiment three, can be based on the dispensing device of ARQ retransmission mechanism equally, also can be based on the dispensing device of HARQ retransmission mechanism.
Embodiment five, a kind of packet retransmission system as shown in figure 11, comprising: dispensing device 1, receiving system 3;
Dispensing device 1 receives the feedback signal of receiving system 3; According to the feedback signal of receiving the number of retransmissions of packet is added up; Result according to statistics obtains indication to channel quality; Determine the adjustment amount of emission parameter according to the channel quality indication that obtains; Carry out the transmission of packet according to adjusted emission parameter;
The packet that receiving system 3 transmission and reception apparatus 1 send feeds back to dispensing device 1 with the reception condition of packet.
Dispensing device 1 in the present embodiment can adopt the structure of packet dispensing device among embodiment three or four.In addition, system of the present invention also can merge the scheme of receiving system feedback carrier interference ratio as the channel quality basis for estimation that adopt, as shown in figure 12, receiving system also feeds back to dispensing device by the Carrier interference ratio that feedback channel will receive packet, and dispensing device judges that comprehensively the Carrier interference ratio of the result of number of retransmissions statistics and receiving system feedback obtains the indication to channel quality.
More than data package retransmission method provided by the present invention and corresponding packet dispensing device and packet retransmission system are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (14)
1, a kind of data package retransmission method is characterized in that, comprising:
The packet transmitting terminal carries out packet number of retransmissions statistics;
Obtain indication according to the result of described packet number of retransmissions statistics to channel quality;
Determine the adjustment amount of emission parameter according to described channel quality indication;
Carry out the transmission of next packet with adjusted emission parameter.
2, data package retransmission method according to claim 1 is characterized in that: described emission parameter comprises the length of transmitting power, constellation order, re-transmission redundant information.
3, data package retransmission method according to claim 1 is characterized in that, the statistics of described packet number of retransmissions comprises:
The packet transmitting terminal receives the feedback signal of packet receiving terminal to the packet reception condition;
Obtain the number of retransmissions of packet according to statistics to described feedback signal.
4, data package retransmission method according to claim 3 is characterized in that: described feedback signal comprises the signal that the expression packet does not correctly receive and confirms the correct signal that receives of packet;
Described statistics to feedback signal comprises, when receiving the signal that described expression packet does not correctly receive, the number of retransmissions of this packet added one; When receiving the signal of the correct reception of described affirmation packet, obtain current data packet number of retransmissions statistics.
According to any described data package retransmission method of claim 1～4, it is characterized in that 5, described result according to packet number of retransmissions statistics obtains the indication of channel quality is comprised:
The number of retransmissions of current data packet and the number of retransmissions of at least one packet are before averaged, obtain average repeat time;
According to the definite indication of described average repeat time to channel quality.
6, data package retransmission method according to claim 5 is characterized in that: adopt the mode of Alpha's filtering to carry out the number of retransmissions of current data packet and number of retransmissions average of at least one before.
7, data package retransmission method according to claim 6, it is characterized in that, describedly determine the indication of channel quality is comprised: described average repeat time is quantized according to average repeat time, carry out correspondingly with channel quality indication, obtain corresponding channel quality indication with several grades.
8, a kind of packet dispensing device comprises the emission parameter adjusting module, it is characterized in that: also comprise channel quality measurement module;
Described channel quality measurement module receives the feedback signal that packet sends, and carries out packet number of retransmissions statistics, obtains indication to channel quality according to the result of statistics;
The adjustment amount that emission parameter is determined in the channel quality indication that described emission parameter adjusting module obtains according to described channel quality measurement module carries out the transmission of packet according to adjusted emission parameter.
9, packet dispensing device according to claim 8 is characterized in that: described channel quality measurement module comprises number of retransmissions statistic unit, statistical average unit and channel quality indicating member;
Described number of retransmissions statistic unit receives the feedback signal that packet sends, and carries out packet number of retransmissions statistics, and statistics is sent to described statistical average unit;
Described statistical average unit averages the number of retransmissions of current data packet and the number of retransmissions of at least one packet before, obtains average repeat time;
Described channel quality indicating member carries out described average repeat time and the channel quality indication with several grades corresponding, obtains corresponding channel quality indication.
10, packet dispensing device according to claim 9, it is characterized in that: described channel quality measurement module also comprises quantifying unit, described statistical average unit is Alpha's mean filter; Described number of retransmissions statistic unit is imported described Alpha's mean filter with the number of retransmissions that each secondary data bag sends successively, and the result of described Alpha's mean filter output Alpha filtering is as average repeat time; Described quantifying unit quantizes described average repeat time, and the average repeat time after quantizing is sent to described channel quality indicating member.
11, according to Claim 8 any～10 described packet dispensing device, it is characterized in that: described emission parameter adjusting module comprises parameter adjustment amount acquiring unit, adjustment amount memory cell and transmitter unit;
Described parameter adjustment amount acquiring unit receives described channel quality indication, obtains corresponding emission parameter adjustment amount from described adjustment amount memory cell, according to the emission parameter adjustment amount that obtains the emission parameter of described transmitter unit is adjusted;
Described transmitter unit carries out the transmission of packet according to adjusted emission parameter.
12, according to Claim 8 any～10 described packet dispensing device, it is characterized in that: also comprise error detection coding module and error correction coding module, described error detection coding module and error correction coding module are carried out error detection coding and error correction coding to packet to be sent successively, and the packet after will encoding sends to described emission parameter adjusting module and sends.
13, a kind of packet retransmission system comprises dispensing device and receiving system, it is characterized in that:
Described dispensing device receives the feedback signal of described receiving system; According to described feedback signal the number of retransmissions of packet is added up; Result according to statistics obtains indication to channel quality; Determine the adjustment amount of emission parameter according to described channel quality indication; Carry out the transmission of packet according to adjusted emission parameter;
Described receiving system receives the packet that described dispensing device sends, and the reception condition of packet is fed back to described dispensing device.
14, packet retransmission system according to claim 13, it is characterized in that: the Carrier interference ratio that described receiving system also will receive packet feeds back to described dispensing device, and described dispensing device obtains indication to channel quality according to the result of described number of retransmissions statistics and described Carrier interference ratio.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009138033A1 (en) * | 2008-05-15 | 2009-11-19 | 华为技术有限公司 | Method, device and system for adjusting the hybrid automatic repeat request times |
| CN102315922A (en) * | 2007-08-10 | 2012-01-11 | 富士通株式会社 | Communicator, sending method and method of reseptance |
| CN101383684B (en) * | 2007-09-07 | 2012-12-19 | 中兴通讯股份有限公司 | Method for immediately feeding back burst failure message |
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| CN102315922A (en) * | 2007-08-10 | 2012-01-11 | 富士通株式会社 | Communicator, sending method and method of reseptance |
| US8619679B2 (en) | 2007-08-10 | 2013-12-31 | Fujitsu Limited | Communication apparatus, transmitting method and receiving method |
| US9288014B2 (en) | 2007-08-10 | 2016-03-15 | Fujitsu Limited | Communication apparatus, transmitting method and receiving method |
| CN101383684B (en) * | 2007-09-07 | 2012-12-19 | 中兴通讯股份有限公司 | Method for immediately feeding back burst failure message |
| CN101277176B (en) * | 2008-05-15 | 2011-09-14 | 华为技术有限公司 | Method, equipment and system for adjusting mixed automatic retransmission time |
| WO2009138033A1 (en) * | 2008-05-15 | 2009-11-19 | 华为技术有限公司 | Method, device and system for adjusting the hybrid automatic repeat request times |
| CN103155466A (en) * | 2012-10-09 | 2013-06-12 | 华为技术有限公司 | Method and device for modulating and adjusting sending terminal and sending terminal |
| CN103155466B (en) * | 2012-10-09 | 2015-12-02 | 华为技术有限公司 | Transmitting terminal modulation method of adjustment and device |
| US11006401B2 (en) | 2014-11-06 | 2021-05-11 | Apple Inc. | Early termination of repeated transmissions for MTC |
| CN107078863A (en) * | 2014-11-06 | 2017-08-18 | 英特尔Ip公司 | The termination in advance that repetition for MTC is transmitted |
| CN106376061A (en) * | 2016-08-24 | 2017-02-01 | 北京千安哲信息技术有限公司 | Transmitting power adjusting method, control terminal and sensor node |
| CN109983722A (en) * | 2016-12-07 | 2019-07-05 | 华为技术有限公司 | Hybrid automatic repeat-request feedback method and device |
| CN109983722B (en) * | 2016-12-07 | 2020-09-11 | 华为技术有限公司 | Hybrid automatic repeat request feedback method and device |
| US10841048B2 (en) | 2016-12-07 | 2020-11-17 | Huawei Technologies Co., Ltd. | Hybrid automatic repeat request feedback method and apparatus |
| CN107181575B (en) * | 2017-04-27 | 2020-06-30 | 工业和信息化部电信研究院 | Self-adaptive hybrid automatic retransmission method |
| CN107181575A (en) * | 2017-04-27 | 2017-09-19 | 工业和信息化部电信研究院 | A kind of adaptive mixing automatic retransmitting method |
| CN108650038A (en) * | 2018-05-08 | 2018-10-12 | 商派软件有限公司 | The method and system of regional network quality is judged with the retransmission rate of data packet |
| CN110048809A (en) * | 2019-03-07 | 2019-07-23 | 中国人民解放军陆军工程大学 | A kind of received dynamic transmission method of more station zero defects fusions of shortwave |
| CN110048809B (en) * | 2019-03-07 | 2022-02-22 | 中国人民解放军陆军工程大学 | Dynamic transmission method for error-free fusion receiving of short wave multi-station |
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