CN102111234A - Relay non-selective decode-and-forward system and method thereof capable of effectively reducing error spread - Google Patents
Relay non-selective decode-and-forward system and method thereof capable of effectively reducing error spread Download PDFInfo
- Publication number
- CN102111234A CN102111234A CN2009102473155A CN200910247315A CN102111234A CN 102111234 A CN102111234 A CN 102111234A CN 2009102473155 A CN2009102473155 A CN 2009102473155A CN 200910247315 A CN200910247315 A CN 200910247315A CN 102111234 A CN102111234 A CN 102111234A
- Authority
- CN
- China
- Prior art keywords
- relaying
- decoding
- module
- bit
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Detection And Prevention Of Errors In Transmission (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention provides a relay non-selective decode-and-forward method capable of effectively reducing error spread. The method is characterized by carrying out hard decision on all the coding bits after being decoded in stead of on information bits only when relay decoding is in error. Thus, no recoding is required in relaying, and speed matching and modulating are only carried out on the coding bits processed with hard decision according to the selected modulating coding format. The scheme provided by the invention can be applied to various relay systems for reducing the error spread of a decode-and-forward technology, and especially for improving the spectrum efficiency of a system under centralized scheduling.
Description
Technical field
The present invention relates to the serious non-selective decoding retransmission method of relaying that effectively reduces the error code diffusion that problem proposed of error code diffusion in the relay system decoding retransmission method, this invention is applicable to the various scenes that have relaying, comprises double bounce or multi-hop, cooperating relay or non-cooperating relay, transparent relay or nontransparent relaying etc.
Background technology
Relaying technique obtains extensive concern because it can effectively increase coverage and enhanced system throughput.In the relaying retransmission technique of present broad research, the decoding retransmission technique is one of wherein topmost relaying retransmission technique.The relaying that adopts decoding to transmit mainly carries out equilibrium, demodulation, channel decoding, channel recodification, remodulates to what receive from signal of base station, gives terminal the signal forwarding that produces again then.Form.The pluses and minuses that decoding is transmitted are apparent: its advantage is the signal of can living again, and suppresses channel and noise effect from the source end to relaying, and supports relaying according to carry out the link circuit self-adapting transmission from the channel quality that is relayed to terminal.In case yet relaying decoding make mistakes, if continue the recompile forward signal, can cause serious error code diffusion.
The decoding forward relay can and then be divided into two classes: the one, and non-selective decoding forward relay, the one, selectivity decoding forward relay.Here provide the concrete grammar of these two kinds of prior aries:
1. traditional non-selective decoding retransmission technique
The concrete steps of its realization are as follows:
The source end is transferred to relaying to packet by certain coded modulation form;
Relaying carries out channel equalization, separates to be in harmonious proportion and decipher the packet that receives.Whether no matter decipher correctly, relaying, then this information bit is carried out recompile (comprising necessary rate-matched), modulation again if declaring the acquired information bit firmly to the soft information of the information bit after deciphering, be transmitted to terminal then;
The packet that end-on is received is deciphered.
If terminal decoding is correct, it will feed back positive acknowledgement (ACK) and give relaying, and transmit this signaling to the source end by relaying, and the transmission success of this packet finishes.Otherwise terminal feedback Negative Acknowledgement (NACK) is given relaying.
Receive when relaying and to make mistakes the NACK of terminal, then transmit this signaling, go to step f) to the source end if oneself is also deciphered.Otherwise relaying will retransmit this packet and give terminal, go to step h).
Receive NACK from relaying when the source end, it will retransmit this packet and give relaying.
Decoding again after retransmission data packet may that the relaying handle receives and the version of receiving previously merge.No matter decipher correctness then, it all is transmitted to terminal to this packet.
Decoding again after retransmission data packet may that the terminal handle receives and the version of receiving previously merge.Go to step d).
The system block diagram of traditional non-selective decoding retransmission technique as shown in Figure 1.As seen, because no matter relaying decipher mistake, all declare firmly, recompile and modulation, must cause serious error code diffusion, this version is transferred to terminal, not only can not bring help to the decoding of terminal, is carrying out the HARQ re-transmission, is bringing worse loss when merging decoding on the contrary.
2. selectivity is deciphered forward relay
For the defective that overcomes the error code diffusion has proposed selectivity decoding forward relay: it requires to carry out Cyclic Redundancy Check after the relaying decoding.If check results explanation decoding is correct, then relaying carries out recompile modulation and forward signal.Otherwise relaying will not continue signal is down transmitted but feed back to source end request retransmission.
Its concrete steps are as follows:
The source end is transferred to relaying to packet by certain coded modulation form;
Relaying carries out channel equalization, separates to be in harmonious proportion and decipher the packet that receives.
If the relaying correct decoding is then declared firmly to the soft information of deciphering the back information bit, then this information bit is carried out recompile (comprising necessary rate-matched), modulation again, be transmitted to terminal then, go to step f); If relaying decoding makes mistakes, relaying feedback NACK also no longer continues to transmit packet to the source end.
The source end receives that the NACK retransmission data packet may is to relaying;
Decoding again after retransmission data packet may that the relaying handle receives and the version of receiving previously merge.Go to step c)
Terminal receives that the packet that relaying is transmitted deciphers.
If terminal decoding is correct, it will feed back positive acknowledgement (ACK) and give relaying, and transmit this signaling to the source end by relaying, and the transmission success of this packet finishes.Otherwise terminal feedback Negative Acknowledgement (NACK) is given relaying.
Relaying receives that the NACK of terminal retransmits packet to terminal
Decoding again after retransmission data packet may that the terminal handle receives and the version of receiving previously merge.Go to step g).
The system block diagram of selectivity decoding retransmission technique as shown in Figure 2.Can overcome the error code diffusion though selectivity decoding is transmitted, it makes that trunk protocol is complicated and base station scheduling resource and interference management increased complexity.Centralized scheduling system particularly, the base station is responsible for the scheduling of resource function fully, and in order to reduce end-to-end propagation delay time, the base station is just good the resource allocation of multi-hop link when transmitting for the first time usually.In this case, though relaying because decoding makes mistakes forward signal down not, but corresponding resource can not have been used by other transmission well by base station assigns, thereby have to waste this resource.
Even and in fact the relaying decoding signal of makeing mistakes still contains many useful informations.If the resource that relaying can utilize the base station to distribute is transmitted down useful information as much as possible and overcome the error code diffusion influence as far as possible, this version of terminal acquisition will bring obvious performance gain to the merging decoding that mixes automatic request retransmission (HARQ) so.Motivation of the present invention that Here it is.
In order to solve the defective of existing scheme, the present invention proposes the non-selective decoding retransmission method of a kind of novel relaying.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of non-selective decoding retransmission method of relaying that effectively reduces the error code diffusion, is used to effectively reduce the error code diffusion, improves spectrum efficiency and performance gain that centralized scheduling gets relay system.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the non-selective decoding repeater system of relaying that effectively reduces the error code diffusion, relaying that this system comprises the source end, be connected by channel with the source end and the terminal that is connected by channel with relaying, described source end comprises the coding module that connects successively, be used for information bit is carried out chnnel coding, generate coded-bit;
The rate-matched module is used for coded-bit is punched, with the coupling code check adaptively selected according to channel quality;
Modulation module is used for the coded-bit after the punching is become the selected complex symbol of modulating;
Described relaying comprises the balance module that connects successively, is used for the complex symbol of selected modulation is carried out the time-domain and frequency-domain equilibrium;
Demodulation merges module, is used for the complex symbol after the equilibrium is mapped to the soft information of binary coding bit or coded-bit;
Decoding module is used for coded-bit is carried out channel decoding, obtains the soft information of all coded-bits;
Information bit is declared module firmly, and being used for the soft information hard decision of coded-bit is binary information bit;
The CRC check module, whether the binary message bit after being used to utilize CRC to declare firmly is correct;
All encoding ratio ultrahards are declared module, according to the output result of CRC check module, the soft information judgement of corresponding all coded-bits in decoding back are binary coded-bit;
The recodification module according to the output result of CRC check module, is carried out chnnel coding to the information bit after declaring firmly again;
The rate-matched module is used for coded-bit is punched, with the coupling code check adaptively selected according to channel quality;
Modulation module is used for the binary coding bit after the punching is become the selected complex symbol of modulating by the regulation of modulation system;
With the ACK/NACK feedback module that relaying is connected with the source end, be used for relaying and feed back the signaling that it deciphers correctness to the source end, decipher correct feeding back ACK, decoding error feedback NACK;
Described terminal comprises the balance module that connects successively, is used for the complex signal of relaying output is carried out the time-domain and frequency-domain equilibrium;
Demodulation merges module, is used for the complex symbol after the equilibrium is mapped to the log-likelihood ratio of binary coding bit or coded-bit;
Decoding module is used for to being used for coded-bit being carried out channel decoding, obtains the soft information of all coded-bits;
Information bit is declared module firmly, is used for the soft information judgement of coded-bit is binary information bit;
With the ACK/NACK feedback module that terminal is connected with relaying, be used for terminal and feed back the signaling that it deciphers correctness to relaying, decipher correct feeding back ACK, decoding error feedback NACK.
The present invention also comprises a kind of non-selective decoding retransmission method of relaying that effectively reduces the error code diffusion, and this method may further comprise the steps:
A) the source end is transferred to relaying to packet by the coded modulation form;
B) relaying carries out channel equalization, separates to be in harmonious proportion and decipher the packet that receives; If relaying decoding is correct, then the soft information of deciphering the back information bit is declared the acquired information bit firmly, then this information bit is carried out recompile, modulation again, be transmitted to terminal then; If relaying decoding error, relaying are then directly declared the soft information of all coded-bits of deciphering the back whole codeword firmly, carry out then being transmitted to terminal after rate-matched, the modulation;
C) terminal receives that the packet that relaying is transmitted deciphers;
D) if terminal decoding is correct, it will feed back positive acknowledgement and give relaying, and transmit this signaling to the source end by relaying, and the transmission success of this packet finishes; Otherwise terminal feedback Negative Acknowledgement is given relaying;
E),, go to step f) if oneself also decoding error is then transmitted this signaling to the source end if relaying is received the Negative Acknowledgement of terminal; Otherwise relaying will retransmit this packet and give terminal, go to step h);
F) receive Negative Acknowledgement when the source end, will retransmit this packet and give relaying from relaying;
G) relaying carries out the retransmission data packet may that receives and the packet of receiving previously to decipher after demodulation merges again; If relaying decoding is correct, then the soft information of deciphering the back information bit is declared the acquired information bit firmly, then this information bit is carried out recompile, modulation again, be transmitted to terminal then; If relaying decoding error, relaying are then declared firmly to the soft information of all coded-bits of deciphering the back whole codeword, carry out then being transmitted to terminal after rate-matched, the modulation;
H) decoding again after terminal merges the retransmission data packet may that receives and the packet received previously.
The present invention suggests plans and can be applied in the various relay systems, is used for reducing deciphering the error code diffusion of retransmission technique, particularly improves under the centralized scheduling systematically spectrum efficiency.
Description of drawings:
Fig. 1 is the system block diagram of existing non-selective decoding retransmission technique;
Fig. 2 is the system block diagram of existing selectivity decoding retransmission technique;
Fig. 3 is the system block diagram of the non-selective decoding retransmission technique of the present invention;
Fig. 4 carries out the simulation curve of link simulation for the present invention.
Embodiment
Please refer to shown in Figure 3, effectively reduce the non-selective decoding repeater system of relaying of error code diffusion, relaying that this system comprises the source end, be connected by channel with the source end and the terminal that is connected by channel with relaying, described source end comprises the coding module that connects successively, be used for information bit is carried out chnnel coding, generate coded-bit; The rate-matched module is used for coded-bit is punched, with the coupling code check adaptively selected according to channel quality; Modulation module is used for the coded-bit after the punching is become the selected complex symbol of modulating;
Described relaying comprises the balance module that connects successively, is used for the complex symbol of selected modulation is carried out the time-domain and frequency-domain equilibrium; Demodulation merges module, is used for the complex symbol after the equilibrium is mapped to the soft information of binary coding bit or coded-bit; Decoding module is used for coded-bit is carried out channel decoding, obtains the soft information of all coded-bits; Information bit is declared module firmly, and being used for the soft information hard decision of coded-bit is binary information bit; The CRC check module, whether the binary message bit after being used to utilize CRC to declare firmly is correct; All encoding ratio ultrahards are declared module, according to the output result of CRC check module, the soft information judgement of corresponding all coded-bits in decoding back are binary coded-bit; The recodification module according to the output result of CRC check module, is carried out chnnel coding to the information bit after declaring firmly again; The rate-matched module is used for coded-bit is punched, with the coupling code check adaptively selected according to channel quality; Modulation module is used for the binary coding bit after the punching is become the selected complex symbol of modulating by the regulation of modulation system; With the ACK/NACK feedback module that relaying is connected with the source end, be used for relaying and feed back the signaling that it deciphers correctness to the source end, decipher correct feeding back ACK, decoding error feedback NACK;
Described terminal comprises the balance module that connects successively, is used for the complex signal of relaying output is carried out the time-domain and frequency-domain equilibrium; Demodulation merges module, is used for the complex symbol after the equilibrium is mapped to the log-likelihood ratio of binary coding bit or coded-bit; Decoding module is used for to being used for coded-bit being carried out channel decoding, obtains the soft information of all coded-bits; Information bit is declared module firmly, is used for the soft information judgement of coded-bit is binary information bit; With the ACK/NACK feedback module that terminal is connected with relaying, be used for terminal and feed back the signaling that it deciphers correctness to relaying, decipher correct feeding back ACK, decoding error feedback NACK.
The invention still further relates to a kind of non-selective decoding retransmission method of relaying that effectively reduces the error code diffusion, its concrete implementation step is as follows:
A) the source end is transferred to relaying to packet by certain coded modulation form;
B) relaying carries out channel equalization, separates to be in harmonious proportion and decipher the packet that receives.If the relaying correct decoding is then declared the acquired information bit firmly to the soft information of deciphering the back information bit, then this information bit is carried out recompile (comprising necessary rate-matched), modulation again, be transmitted to terminal then; If relaying decoding makes mistakes, relaying is then declared firmly to the soft information of all coded-bits of deciphering the back whole codeword, carry out then being transmitted to terminal after necessary rate-matched, the modulation, simultaneously as option, relaying is estimated the equivalent noise variance after the decoding, and it is transmitted to terminal together with data.
C) terminal receives that the packet that relaying is transmitted deciphers.
D) if terminal decoding is correct, it will feed back positive acknowledgement (ACK) and give relaying, and transmit this signaling to the source end by relaying, and the transmission success of this packet finishes.Otherwise terminal feedback Negative Acknowledgement (NACK) is given relaying.
E) receive the NACK of terminal when relaying, make mistakes, then transmit this signaling, go to step f) to the source end if oneself is also deciphered.Otherwise relaying will retransmit this packet and give terminal, go to step h)
F) receive NACK from relaying when the source end, it will retransmit this packet and give relaying.
G) relaying is deciphered after the retransmission data packet may that receives and the version of receiving are previously merged again.If the relaying correct decoding is then declared the acquired information bit firmly to the soft information of deciphering the back information bit, then this information bit is carried out recompile (comprising necessary rate-matched), modulation again, be transmitted to terminal then; If relaying decoding makes mistakes, relaying is then declared firmly to the soft information of all coded-bits of deciphering the back whole codeword, carry out then being transmitted to terminal after necessary rate-matched, the modulation, simultaneously as option, relaying is estimated the equivalent noise variance after the decoding, and it is transmitted to terminal together with data.
H) decoding again after terminal merges the retransmission data packet may that receives and the version received previously, if relaying is transmitted the equivalent noise variance after the decoding, then the terminal high specific that utilizes it to carry out HARQ merges.Go to step d).
Carry out link simulation at this embodiment and aforesaid existing scheme, simulation parameter is as follows:
| The scheme of emulation contrast | 1) traditional selectivity decoding forwarding 2) traditional non-selective decoding forwarding 3) the non-selective decoding of the present invention's proposition is transmitted |
| Modulation | BPSK |
| Channel quality | 1) the source end to the relaying signal to noise ratio=-1.8dB 2) the source end to the relaying signal to noise ratio=-1.6dB |
| Channel model | Gaussian channel |
| Code length | 320 |
| Chnnel coding | (13,11) 8Turbo sign indicating number |
| Code check | 1/2 |
Simulation curve is as shown in Figure 4: this emulation at be centralized scheduling.Because in the system of centralized scheduling, the base station is just good the resource allocation of multi-hop link when transmitting for the first time.In this case, though the selective forwarding relaying because decoding makes mistakes forward signal down not, but corresponding resource can not have been used by other transmission well by base station assigns, thereby have to waste this resource.So the present invention program and selective forwarding scheme and traditional non-selective forwarding scheme shared resource in the centralized scheduling system are the same, and because the solution of the present invention can reduce the error code diffusion, thereby improve the decoding performance of terminal, improved the spectrum efficiency of system.Can prove this point from the curve of spectrum efficiency.
The present invention proposes the non-selective decoding retransmission method of a kind of novel relaying, can effectively reduce error code diffusion, improve the spectrum efficiency that centralized scheduling gets relay system.Its innovative point is mainly reflected in following two aspects:
1) when relaying decoding makes mistakes, not only information bit to be declared firmly, but all coded-bits after the decoding are declared (the soft output that existing soft input soft output decode device can obtain all coded-bits of whole codeword) firmly.Relaying does not need to carry out recompile again like this, and only need carry out rate-matched and modulation according to selected modulating-coding form on the coded-bit of declaring firmly.This is the difference that the scheme maximum is transmitted in the present invention and traditional non-selective decoding: traditional non-selective decoding is transmitted and is meant information bit is declared firmly, recompile then, and this is the main source of error code diffusion.
2) make mistakes when relaying decoding, comprise noise in the data of forwarding, allow relaying estimate the equivalent noise variance after the decoding and send to terminal together with data.The high specific that terminal utilizes this equivalence noise variance to carry out HARQ merges.Concrete equivalent noise method of estimation has many existing schemes, it or not the right that the present invention advocated, but requiring relaying that the equivalent noise variance of estimating is sent to terminal together with data is that institute is non-existent in the tradition decoding forwarding scheme, be the signaling that increases newly, further improve the spectrum efficiency of system.
The present invention is applied to exist the various scenes of relaying, comprises double bounce or multi-hop, cooperating relay or non-cooperating relay, transparent relay or nontransparent relaying etc.
The foregoing description just lists expressivity principle of the present invention and effect is described, but not is used to limit the present invention.Any personnel that are familiar with this technology all can make amendment to the foregoing description under spirit of the present invention and scope.Therefore, the scope of the present invention should be listed as claims.
Claims (7)
1. effectively reduce the non-selective decoding repeater system of relaying of error code diffusion, relaying that this system comprises the source end, be connected by channel with the source end and the terminal that is connected by channel with relaying, it is characterized in that: described source end comprises the coding module that connects successively, be used for information bit is carried out chnnel coding, generate coded-bit;
The rate-matched module is used for coded-bit is punched, with the coupling code check adaptively selected according to channel quality;
Modulation module is used for the coded-bit after the punching is become the selected complex symbol of modulating;
Described relaying comprises the balance module that connects successively, is used for the complex symbol of selected modulation is carried out the time-domain and frequency-domain equilibrium;
Demodulation merges module, is used for the complex symbol after the equilibrium is mapped to the soft information of binary coding bit or coded-bit;
Decoding module is used for coded-bit is carried out channel decoding, obtains the soft information of all coded-bits;
Information bit is declared module firmly, and being used for the soft information hard decision of coded-bit is binary information bit;
The CRC check module, whether the binary message bit after being used to utilize CRC to declare firmly is correct;
All encoding ratio ultrahards are declared module, according to the output result of CRC check module, the soft information judgement of corresponding all coded-bits in decoding back are binary coded-bit;
The recodification module according to the output result of CRC check module, is carried out chnnel coding to the information bit after declaring firmly again;
The rate-matched module is used for coded-bit is punched, with the coupling code check adaptively selected according to channel quality;
Modulation module is used for the binary coding bit after the punching is become the selected complex symbol of modulating by the regulation of modulation system;
With the ACK/NACK feedback module that relaying is connected with the source end, be used for relaying and feed back the signaling that it deciphers correctness to the source end, decipher correct feeding back ACK, decoding error feedback NACK;
Described terminal comprises the balance module that connects successively, is used for the complex signal of relaying output is carried out the time-domain and frequency-domain equilibrium;
Demodulation merges module, is used for the complex symbol after the equilibrium is mapped to the log-likelihood ratio of binary coding bit or coded-bit;
Decoding module is used for to being used for coded-bit being carried out channel decoding, obtains the soft information of all coded-bits;
Information bit is declared module firmly, is used for the soft information judgement of coded-bit is binary information bit;
With the ACK/NACK feedback module that terminal is connected with relaying, be used for terminal and feed back the signaling that it deciphers correctness to relaying, decipher correct feeding back ACK, decoding error feedback NACK.
2. the non-selective decoding repeater system of relaying that effectively reduces the error code diffusion as claimed in claim 1, it is characterized in that: described relaying comprises that also the output of input reconciliation blending and module connects, output is conciliate the cache module of the input connection of blending and module, is used for the repeatedly transmission/retransmission version of the same packet of buffer memory.
3. the non-selective decoding repeater system of relaying that effectively reduces the error code diffusion as claimed in claim 1, it is characterized in that: described terminal comprises that also the output of input reconciliation blending and module connects, output is conciliate the cache module of the input connection of blending and module, is used for the repeatedly transmission/retransmission version of the same packet of buffer memory.
4. the non-selective decoding repeater system of relaying that effectively reduces the error code diffusion as claimed in claim 1, it is characterized in that: described relaying also comprises its output module of decoding that is connected with the decoding module of relaying, is used for the demodulation merging module of output equivalent signal to noise ratio to terminal.
5. effectively reduce the non-selective decoding retransmission method of relaying of error code diffusion, it is characterized in that this method may further comprise the steps:
A) the source end is transferred to relaying to packet by the coded modulation form;
B) relaying carries out channel equalization, separates to be in harmonious proportion and decipher the packet that receives; If relaying decoding is correct, then the soft information of deciphering the back information bit is declared the acquired information bit firmly, then this information bit is carried out recompile, modulation again, be transmitted to terminal then; If relaying decoding error, relaying are then directly declared the soft information of all coded-bits of deciphering the back whole codeword firmly, carry out then being transmitted to terminal after rate-matched, the modulation;
C) terminal receives that the packet that relaying is transmitted deciphers;
D) if terminal decoding is correct, it will feed back positive acknowledgement and give relaying, and transmit this signaling to the source end by relaying, and the transmission success of this packet finishes; Otherwise terminal feedback Negative Acknowledgement is given relaying;
E),, go to step f) if oneself also decoding error is then transmitted this signaling to the source end if relaying is received the Negative Acknowledgement of terminal; Otherwise relaying will retransmit this packet and give terminal, go to step h);
F) receive Negative Acknowledgement when the source end, will retransmit this packet and give relaying from relaying;
G) relaying carries out the retransmission data packet may that receives and the packet of receiving previously to decipher after demodulation merges again; If relaying decoding is correct, then the soft information of deciphering the back information bit is declared the acquired information bit firmly, then this information bit is carried out recompile, modulation again, be transmitted to terminal then; If relaying decoding error, relaying are then declared firmly to the soft information of all coded-bits of deciphering the back whole codeword, carry out then being transmitted to terminal after rate-matched, the modulation;
H) decoding again after terminal merges the retransmission data packet may that receives and the packet received previously.
6. the non-selective decoding retransmission method of relaying that effectively reduces the error code diffusion as claimed in claim 5, it is characterized in that, described step b) further comprises the steps, relaying is estimated the equivalent noise variance after the decoding, and this equivalence noise variance is transmitted to terminal, the high specific that terminal utilizes the equivalent noise variance to carry out HARQ merges.
7. the non-selective decoding retransmission method of relaying that effectively reduces the error code diffusion as claimed in claim 5 is characterized in that, the correct or wrong cyclic redundancy CRC check that adopts of relaying decoding in the described step b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910247315.5A CN102111234B (en) | 2009-12-28 | 2009-12-28 | Relay non-selective decode-and-forward system and method thereof capable of effectively reducing error spread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910247315.5A CN102111234B (en) | 2009-12-28 | 2009-12-28 | Relay non-selective decode-and-forward system and method thereof capable of effectively reducing error spread |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102111234A true CN102111234A (en) | 2011-06-29 |
| CN102111234B CN102111234B (en) | 2014-10-22 |
Family
ID=44175272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910247315.5A Expired - Fee Related CN102111234B (en) | 2009-12-28 | 2009-12-28 | Relay non-selective decode-and-forward system and method thereof capable of effectively reducing error spread |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102111234B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109600204A (en) * | 2017-09-30 | 2019-04-09 | 华为技术有限公司 | A kind of data transmission method and device |
| CN111934893A (en) * | 2019-04-28 | 2020-11-13 | 大唐移动通信设备有限公司 | Problem positioning processing method and device for uplink abnormal data |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5035045B2 (en) * | 2008-03-14 | 2012-09-26 | 富士通株式会社 | Data relay device, communication device, and data relay method |
| CN101442394B (en) * | 2008-11-10 | 2011-06-29 | 西安电子科技大学 | Network encode collaboration communication method capable of iteratively decoding |
-
2009
- 2009-12-28 CN CN200910247315.5A patent/CN102111234B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109600204A (en) * | 2017-09-30 | 2019-04-09 | 华为技术有限公司 | A kind of data transmission method and device |
| CN111934893A (en) * | 2019-04-28 | 2020-11-13 | 大唐移动通信设备有限公司 | Problem positioning processing method and device for uplink abnormal data |
| CN111934893B (en) * | 2019-04-28 | 2021-09-28 | 大唐移动通信设备有限公司 | Problem positioning processing method and device for uplink abnormal data |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102111234B (en) | 2014-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101573907B (en) | Relay-assisted HARQ transmission system | |
| US7975199B2 (en) | Relay-assisted HARQ transmission system | |
| CN101047431B (en) | Method for implementing mixed automatic retransmit in communication system containing repeater station | |
| KR101003196B1 (en) | Apparatus and method for retransmission request in wireless communication system using relay | |
| CN101621364B (en) | Automatic retransmission controller and reconfiguration device of retransmission block | |
| US7940712B2 (en) | Method and arrangement for coding and scheduling in packet data communication systems | |
| JP5450599B2 (en) | Preemptive acknowledgment for data transmission in communication systems | |
| JP5673559B2 (en) | Wireless communication system and data transmission method thereof | |
| CN101615986A (en) | A kind of data transmission method, device and communication system | |
| WO2010029763A1 (en) | Relay apparatus and wireless communication system | |
| KR20100054735A (en) | Method and apparatus for harq operation with network coding | |
| KR20100124833A (en) | Cooperative communications techniques | |
| CN101102174A (en) | Mixing automatic request resending method and its applicable relay device and communication system | |
| CN108370293B (en) | Relay method, relay, destination device, and communication system thereof | |
| CN103095440B (en) | Automatic repeat request system and method is mixed in free space optical communication | |
| JPWO2010029764A1 (en) | Wireless communication apparatus and error detection result feedback method | |
| CN103546245A (en) | Data packet retransmission method based on network codes | |
| CN101964703A (en) | Data retransmission method and system | |
| CN101562506A (en) | Data transmission method | |
| CN102111234B (en) | Relay non-selective decode-and-forward system and method thereof capable of effectively reducing error spread | |
| CN102111357B (en) | Relay demodulating and forwarding system and method for overcoming signal distortion | |
| CN102082651B (en) | Method for realizing mixed automatic retransmission in relay station-including communication system | |
| CN102013965A (en) | Method for transmitting broadcast service by utilizing carrier aggregation technology and retransmitting by utilizing network coding | |
| CN102263626A (en) | Method and system for retransmitting data in wireless relay network | |
| KR20080089118A (en) | Apparatus and method for data retrnasmission of asynchronous control message transmission in wireless communication system using relay |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20181228 |