Forward error correction-based method for reliably transmitting network coding multicast data stream

Abstract

The invention is provided based on a classical network coding theory, and provides a novel forward error correction-based method for reliably transmitting a network coding multicast data stream by fusing the existing forward error correction technology and a network coding technology to solve the problem of data packet dropout. In the method, redundant data with the forward error correction function is added into each parallel data stream on a network coding multicast path, and is commanded to code according to a coding vector the same as original data when passing through a node with a network coding function; and a source node can regulate the redundancy of the data stream in real time according to the size of packet dropout which is fed back by a target node. According to the method, redundancy protection to transmission data on any link in a multicast tree can be realized, namely, in a certain packet dropout, all target nodes can be recovered from received data to establish the original data, even packet dropout happens on any one or more links in the multicast path simultaneously, so that the defect that a plurality of target nodes are influenced due to that single coding data is lost in the classical network coding multicast network can be overcome. Therefore, the capability of data loss tolerance of the multicast network based on the network coding can be improved.

Description

technical field [0001] Aiming at the multicast network based on network coding, the invention proposes a new method for reliable transmission of multicast data flow based on forward error correction technology, which belongs to the technical field of communication and network. Background technique [0002] Network coding is a new information exchange technology that combines routing and coding. Based on the traditional store-and-forward routing method, it allows intermediate nodes to code and combine different information streams flowing through it, increasing the amount of information transmitted per unit time. , making it possible for the network flow capacity to reach the upper bound indicated by Shannon's theory. It has the advantages of improving network throughput, balancing network load, increasing network bandwidth utilization, reducing network resource loss, improving network security, and reducing energy consumption. It provides reliable technical support for desig...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the impact of data packet loss on network performance due to resource conflicts and other reasons in network coding-based multicast networks

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