An Adaptive Pipeline Transmission Method Suitable for Physical Layer Rateless Coding Transmission

A technology of rateless coding and transmission method, which is applied in the field of adaptive pipeline transmission, channel coding and transmission, which can solve the problems of transmission waste, unreliable transmission, difficult to cope with coding, etc., and achieve the effect of high throughput efficiency

Active Publication Date: 2017-08-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the estimated channel parameter is greater than the actual channel parameter, although reliable transmission can be achieved, it causes a waste of transmission, because at this time a higher bit rate channel error correction coding can be used; when the estimated channel parameter is less than the actual channel parameter When , reliable transmission cannot be achieved, and channel error correction coding with a lower code rate is required at this time
And in many cases, the channel is still changing at any time or cannot be judged in advance. At this time, these traditional codes are difficult to cope with.

Method used

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  • An Adaptive Pipeline Transmission Method Suitable for Physical Layer Rateless Coding Transmission
  • An Adaptive Pipeline Transmission Method Suitable for Physical Layer Rateless Coding Transmission
  • An Adaptive Pipeline Transmission Method Suitable for Physical Layer Rateless Coding Transmission

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Embodiment 1

[0069] image 3 It is a schematic diagram of an adaptive pipeline transmission method suitable for rateless coding transmission of the physical layer. Such as image 3 As shown, when the sending end is sending the subframe of the data packet N-2, it is also decoding the data packet N-3 at the same time. After receiving the ACK of the data packet N-3, the data of the data packet N-1 is sent immediately, and the data packet N-2 is decoded at the same time. After sending the subframe of the data packet N, the sender waits for the ACK of the data packet N-1 to time out, then sends the redundant subframe of the data packet N-1, and continues to wait for the ACK. Wait for timeout again, and send the redundant subframe of data packet N-1 again. Whenever the receiving end receives a redundant subframe, it immediately adds the data of the subframe to the decoder for joint decoding. The sending end receives the ACK after sending multiple redundant subframes of the data packet N-1. A...

Embodiment 2

[0071] Figure 4 It is an actual test chart that is suitable for the adaptive pipeline transmission method of rateless coding transmission in the physical layer, and the number of subframes sent continuously changes adaptively with the change of the signal-to-noise ratio. The sending end reads a 4096-byte data packet each time, and then performs rateless encoding to generate a 32,000-byte encoded packet. The encoded packet is divided into 20 subframes, and one subframe carries 1600 bytes of encoded packet data. The selected adaptive algorithm parameter is δ=0.4, The preceding data packets are transmitted under a Gaussian channel with a -3dB signal-to-noise ratio, and most of the data packets are sent continuously for 12 subframes. Since in the case of 12 subframes, the receiving end has a very high probability of successful decoding, so every once in a while, the number of subframes sent continuously will drop to 11, but will soon increase to 12 subframes. By the time of th...

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Abstract

The invention discloses a self-adaptive assembly line transmission method suitable for physical layer rateless code transmission. A sending end firstly conducts rateless encoding on a data packet to generate enough encoding packets, and then the encoding packets are cut into multiple encoding packet blocks which are packaged into sub-frames; each time when sub-frames of a new data packet are sent, rateless encoding and sub-frame packaging are conducted on the next data packet, a channel is detected, and the ACK of the last data packet is received; a receiving end conducts rateless decoding on a data packet i-1 when receiving sub-frames of a data packet N; if decoding is successfully conducted on the data packet i-1 when sub-frames of a data packet i are received, decoding of the data packet i is instantly started once the number of the received sub-frames of the data packet i exceeds the threshold value for starting decoding, and the ACK of the data packet i-1 is sent after all the sub-frames of the data packet are received.

Description

technical field [0001] The invention relates to channel coding and transmission technology in the communication field, in particular to an adaptive pipeline transmission method suitable for rateless coding transmission of the physical layer. Background technique [0002] The basic purpose of a communication system is to efficiently, reliably and safely transmit information from a source to a destination. The noise in the disturbed communication channel will inevitably produce different degrees of interference to the transmitted information, which may reduce the communication reliability. Therefore, the core issue of communication system design is how to overcome interference in channels with random noise, reduce the error of information transmission, and at the same time ensure the efficiency of information transmission. In order to overcome the interference of various noises in the channel, a method of error correction coding is proposed to achieve reliable transmission. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/16
Inventor 张朝阳屠坤姚创沐余启联杨潇翔付攀玉张婧
Owner ZHEJIANG UNIV
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