Data cutting and packaging method suitable for physical layer rateless code transmission

Abstract

The invention discloses a data cutting and packaging method suitable for physical layer rateless code transmission. A sending end reads data from an information source, an MAC frame header and a CRC proof test value of a whole MAC frame are added, and therefore an information packet is obtained; then, rateless code encoding is conducted on the information packet to generate an encoding packet, and the encoding packet is divided into multiple blocks; a physical layer frame header with a leading character, modulation mode identification, an information packet identification number, an encoding packet identification number, an encoding packet length and other related information is packaged on each block of the encoding packet, and then each block is modulated into a sub-frame. By adjusting the number of the sent sub-frames and the size of each block of the encoding packet, the transmission rate can be flexibly controlled, and the characteristic of the code rate self-adaptive channel change of a rateless code is given into full play; a receiving end stores information of the encoding packet at the corresponding position after receiving the sub-frames, and therefore decoding can be smoothly conducted.

Description

technical field [0001] The invention relates to channel coding and transmission technology in the communication field, in particular to a data splitting and encapsulating method suitable for rateless coding transmission of a 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. B...

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.

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