CN106330402A - LORA wireless transmission system error encoding method for Internet of Things - Google Patents
LORA wireless transmission system error encoding method for Internet of Things Download PDFInfo
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- CN106330402A CN106330402A CN201610783274.1A CN201610783274A CN106330402A CN 106330402 A CN106330402 A CN 106330402A CN 201610783274 A CN201610783274 A CN 201610783274A CN 106330402 A CN106330402 A CN 106330402A
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- lora
- coding
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Classifications
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0057—Block codes
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0072—Error control for data other than payload data, e.g. control data
- H04L1/0073—Special arrangements for feedback channel
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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
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
Abstract
The invention relates to the technical field of the Internet of Things, and particularly relates to a LORA wireless transmission system error encoding method for the Internet of Things. The method comprises the following steps: step S101: sending a LORA information code: transmitting an information code of a terminal of the Internet of Things to a LORA channel encoder, and transmitting the LORA information code by the LORA channel encoder; step S102: correcting the LORA information code: in a process of transmitting the LORA information code from the LORA channel encoder to a LORA channel decoder, detecting, finding and correcting a wrong code; and step S103: receiving the LORA information code: receiving the corrected code transmitted by the LORA channel encoder by the LORA channel decoder. By adoption of the above-mentioned method, the wrong code sent by the LORA channel encoder is detected, found and corrected in three manners of error detection and retransmission, forward error correction and hybrid error correction, and thus a received signal of the LORA channel decoder is small in delay and good in instantaneity.
Description
Technical field
The present invention relates to technology of Internet of things field, a kind of LORA wireless transmitting system mistake for Internet of Things is compiled
Code method.
Background technology
Compared with other wireless systems, LORA technology has following several big advantage.It uses spread-spectrum modulation technique, can demodulate
Noise less than 20dB.Which ensure that high sensitivity, reliable network connect, improve network efficiency simultaneously and eliminate dry
Disturb.Compared to mesh network, the star topology of LORAWAN agreement eliminates synchronization overhead and jumping figure, thus reduces merit
Consumption also can allow multiple concurrent application program to run on network.Meanwhile, the communication distance that LORA technology realizes is more wireless than other
Agreement will be much longer so that whole system gets final product work without repeater, thus reduces whole possessing cost.Additionally, phase
Compared with 3G and 4G cellular network, LORA technology extensibility for Embedded Application is higher, and cost performance is higher.
It is known that no matter be analog communication system or digital communication system, all exist because interference and transmission are special
The bad harmful effect that signal is caused of property.Digital communication system can the interference protection measure from hardware and the channel on software
Encode during information is transmitted by two aspects the mistake occurred be controlled and correct.
Chinese invention patent application CN 101502002 A discloses a kind of radio communication error detection coding method, is used for
To carry out low-density checksum coding send Bit String error detection coding, only to low-density in described transmission Bit String
The row weight of the check matrix of checksum coding carries out error detection coding less than the bit of threshold value.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of LORA wireless transmitting system mistake for Internet of Things and compile
Code method.
For solving above-mentioned technical problem, a kind of LORA wireless transmitting system error coding for Internet of Things of the present invention
Method, comprises the following steps,
Step S101:LORA information coding sends, and the information code of internet-of-things terminal is transferred to by LORA channel encoder,
LORA channel encoder transmission LORA information coding；
Step S102:LORA information coding is corrected, and LORA information coding is transferred to LORA channel from LORA channel encoder
During decoder transmission, detection finds error coded and corrects；
Step S103:LORA information coding receives, and the process that LORA decoder receives from the transmission of LORA channel encoder is entangled
Positive coding.
Further, in described step S102 detection find error coded and correction include error detection repeating transmission, forward error correction and
Three kinds of modes of hybrid error correction.
Further, when described step S102 using forward error correction correct mode, LORA info encoder channel
Become the code that can correct mistake after coding, then sent by channel；After LORA information decoder receives coding, according to
The coding rule appointed with LORA info encoder, is found by decoding and is corrected the error in data brought because of transmission automatically.
Further, when using error detection to retransmit correction mode in described step S102, LORA info encoder is by information
Code becomes and the code character of error detection can be sent to channel, and LORA information decoder is tested after receiving a code character, by inspection knot
Fruit feeds back to LORA info encoder as an answer signal to LORA info encoder by backward channel；LORA information
Encoder is made according to the answer signal received and is to continue with sending newly encoded data still the judgement of the data re-transmitting made mistakes.
Further, using hybrid error correction to correct mode in described step S102 is forward error correction mode and error detection repeating transmission
The combination of mode.
After using said method, the present invention is respectively by error detection repeating transmission, forward error correction and three kinds of modes pair of hybrid error correction
The coding that LORA channel encoder sends carries out detection and finds error coded and correct, and such LORA decoder receives prolonging of signal
Time little, real-time good.
Accompanying drawing explanation
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
Fig. 1 is the flow chart of a kind of LORA wireless transmitting system error coding method for Internet of Things of the present invention.
Detailed description of the invention
As it is shown in figure 1, a kind of LORA wireless transmitting system error coding method for Internet of Things of the present invention, including following
Step,
Step S101:LORA information coding sends, and the information code of internet-of-things terminal is transferred to by LORA channel encoder,
LORA channel encoder transmission LORA information coding；
Step S102:LORA information coding is corrected, and LORA information coding is transferred to LORA channel from LORA channel encoder
During decoder transmission, detection finds error coded and corrects；
Step S103:LORA information coding receives, and the process that LORA decoder receives from the transmission of LORA channel encoder is entangled
Positive coding.
Further, in described step S102 detection find error coded and correction include error detection repeating transmission, forward error correction and
Three kinds of modes of hybrid error correction.
Further, when described step S102 using forward error correction correct mode, LORA info encoder channel
Become the code that can correct mistake after coding, then sent by channel；After LORA information decoder receives coding, according to
The coding rule appointed with LORA info encoder, is found by decoding and is corrected the error in data brought because of transmission automatically.
Further, when using error detection to retransmit correction mode in described step S102, LORA info encoder is by information
Code becomes and the code character of error detection can be sent to channel, and LORA information decoder is tested after receiving a code character, by inspection knot
Fruit feeds back to LORA info encoder as an answer signal to LORA info encoder by backward channel；LORA information
Encoder is made according to the answer signal received and is to continue with sending newly encoded data still the judgement of the data re-transmitting made mistakes.
Although the foregoing describing the detailed description of the invention of the present invention, but those skilled in the art should be appreciated that this
It is merely illustrative of, present embodiment can be made various changes or modifications, without departing from principle and the essence of invention, this
The protection domain of invention is only limited by the claims that follow.
Claims (5)
1. the LORA wireless transmitting system error coding method for Internet of Things, it is characterised in that comprise the following steps
Step S101:LORA information coding sends, and the information code of internet-of-things terminal is transferred to by LORA channel encoder, LORA
Channel encoder transmission LORA information coding；
Step S102:LORA information coding is corrected, and LORA information coding is transferred to LORA channel decoding from LORA channel encoder
During device transmission, detection finds error coded and corrects；
Step S103:LORA information coding receive, LORA decoder receive from LORA channel encoder transmission through correction
Coding.
2. according to a kind of LORA wireless transmitting system error coding method for Internet of Things described in claim 1, its feature
It is: in described step S102, detection finds that error coded correction include error detection repeating transmission, forward error correction and hybrid error correction three kinds
Mode.
3. according to a kind of LORA wireless transmitting system error coding method for Internet of Things described in claim 2, its feature
Being: when using forward error correction to correct mode in described step S102, becoming after LORA info encoder channel coding can
Correct the code of mistake, then sent by channel；After LORA information decoder receives coding, encode according to LORA information
The coding rule that device is appointed, is found by decoding and is corrected the error in data brought because of transmission automatically.
4. according to a kind of LORA wireless transmitting system error coding method for Internet of Things described in claim 2, its feature
It is: when using error detection to retransmit correction mode in described step S102, information code is become by LORA info encoder can error detection
Code character be sent to channel, LORA information decoder is tested after receiving a code character, and assay is passed through backward channel
Feed back to LORA info encoder as an answer signal to LORA info encoder；LORA info encoder is according to receiving
Answer signal make and be to continue with sending newly encoded data still the judgement of the data re-transmitting made mistakes.
5. according to a kind of LORA wireless transmitting system error coding method for Internet of Things described in claim 2, its feature
It is: using hybrid error correction to correct mode in described step S102 is forward error correction mode and the combination of error detection repeat system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610783274.1A CN106330402A (en) | 2016-08-30 | 2016-08-30 | LORA wireless transmission system error encoding method for Internet of Things |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634765A (en) * | 2017-09-22 | 2018-01-26 | 中联惠众信息技术（北京）有限公司 | A kind of Internet of Things coding method and system |
| CN107682058A (en) * | 2017-11-22 | 2018-02-09 | 深圳大学 | A kind of LoRa method for transmitting signals based on MIMO |
| CN107846464A (en) * | 2017-11-08 | 2018-03-27 | 深圳大学 | A kind of multiple antennas Internet of Things information transferring method |
| CN108923817A (en) * | 2018-07-10 | 2018-11-30 | 南京邮电大学 | The method interfered between terminal is reduced in a kind of LoRa network |
| CN109525367A (en) * | 2018-11-14 | 2019-03-26 | 电子科技大学 | Error detection and adaptive error correction method based on LoRa coding and decoding mechanism |
| CN110532127A (en) * | 2019-08-13 | 2019-12-03 | 南京芯驰半导体科技有限公司 | A kind of error checking and correction bit protocol converter |
| CN113114416A (en) * | 2021-03-30 | 2021-07-13 | 深圳市冠标科技发展有限公司 | Information transmission system, method and computer storage medium |
| CN114050889A (en) * | 2021-11-06 | 2022-02-15 | 东南大学 | Low-power-consumption wide area network anti-interference method with weight error detection |
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| CN110532127A (en) * | 2019-08-13 | 2019-12-03 | 南京芯驰半导体科技有限公司 | A kind of error checking and correction bit protocol converter |
| CN113114416A (en) * | 2021-03-30 | 2021-07-13 | 深圳市冠标科技发展有限公司 | Information transmission system, method and computer storage medium |
| CN113114416B (en) * | 2021-03-30 | 2022-08-12 | 北海瀚迪智能科技有限公司 | Information transmission system, method and computer storage medium |
| CN114050889A (en) * | 2021-11-06 | 2022-02-15 | 东南大学 | Low-power-consumption wide area network anti-interference method with weight error detection |
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