Efficient coding design method based on BATS code in multi-hop transmission system

Abstract

The invention discloses an efficient coding design method based on a BATS code in a multi-hop transmission system. The efficient coding design method comprises the following steps: 1) dividing an original file into K original data packets with equal length; 2) at a transmitter end, performing outer code encoding of the BATS code on the k equilong original data packets by adopting an efficient encoding design scheme of the BATS code to obtain encoded packets; 3) sending the encoded packets obtained in the step 2) to a relay node through a wireless channel; 4) enabling the relay node to receivethe encoded packets, and codes the encoded packets belonging to the same batch by using BATS intra-code coding to obtain recoded encoded packets; 5) enabling the relay node to send re-coded packets tothe next relay node; and 6) enabling a receiver to find the encoded packets belonging to the same batch, perform iterative decoding on the coded packets of the same batch, and performs Gaussian elimination decoding on the coded packets of the same batch to obtain the original data packets. The invention can reduce the coding redundancy in multi-hop network transmission and improve the transmission efficiency of the data packets.

Description

technical field [0001] The invention belongs to the field of wireless communication, and relates to a high-efficiency coding design method based on BATS codes in a multi-hop transmission system. Background technique [0002] In recent years, with the continuous development of wireless network communication technology, wireless networks have been widely used. Taking mobile Internet as an example, as of December 2019, the number of mobile Internet users in my country has reached 829 million. It can be seen that the demand for wireless networks growing year by year. Therefore, how to improve the transmission performance and reliability of wireless networks is a major challenge facing the current wireless network technology research. As an example to improve the reliability of data dissemination in the network, the concept of network coding was first proposed in 2001. Unlike traditional intermediate nodes that can only store and forward data packets, network coding allows interm...

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Problems solved by technology

[0004] For today's BATS code, it has good transmission performance when there are many relay nodes in the network, but there is a problem of excessive encoding overhead. For today's wireless network transmission, the encoding overhead is small, which means low delay. Faster transmission speed and better user experience, so reducing the encoding overhead of BATS codes has become a key issue in the performance optimization of BATS codes

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