Performance Simulation Of Linear Network Error Correction Codes

In a communications network, the Network Coding on the intermediatenode can increase the network messages transmission rate, even reach thelegendary minimum cut value of the communications network. However, thenetwork coding can increase the communication network errors caused bydiffusion, which restrict the application of Network Coding. Therefore, in recentyears, people pay more attention to how to reduce the error rate of networkcoding information, in order to improve the reliability of transmission ofmessages. At present, two aspect solutions are put forward: one is from the timedomain point of view, the other is from the perspective of space domain.In time domain, we can implement error detection and correction using thetraditional theory of error correction codes, namely the message itself is thetraditional error correction codes, and use error correction codes’redundancy(time redundancy) to correct the errors, which requires us to choosethe right one as the source code.In space domain, namely the network error correction codes.We need to adda virtual channel to each real one as the error input channel. The virtual channelvalue is1when the channel error occurs, otherwise0.This paper first introduces the theory of network coding, network codingdecoding method and steps, and then in the time domain and space domain tocorrect errors. In time domain, we choose the (7,4)Hamming codes as the errorcorrection codes, and then in space domain using network error correctioncoding. At the same time, this paper also use the intermediate node to correcterrors, to further improve the reliability of network transmission.