Research On Routing And Data Distribution Technology Based On Inter-session Network Coding

With the continuous development of wireless communication and related technologies,multi-hop wireless networks are providing high-quality services for the continuous development of human economy and society and daily life.However,wireless links have problems such as unreliable links,limited throughput,and extended network time.To solve these problems,people have been constantly looking for new solutions to improve the performance of the network.Network coding can make full use of the broadcast characteristics of wireless links to improve network data throughput and provide new ideas for improving the performance of wireless networks.This thesis considers combining network coding with routing and data distribution methods,which can further take advantage of the performance gains brought by network coding,reduce the number of data transmissions in the network,reduce data transmission delays,and improve the throughput of wireless networks.Focusing on this research topic,this thesis mainly does the following work:(1)An opportunistic routing strategy based on network coding between multiple data streams is proposed.In the wireless network,the network coding between multiple data streams is considered.After the network coding of the data streams is transmitted,the traditional store-and-forward method can effectively reduce the number of data packet transmissions.A method based on network coding between multiple data streams is given.Opportunistic routing strategy.Based on the ETX(Exception Transmission Count)metric,an analytical formula for the performance gain of the system is given.Simulation results show that the more data streams that can be encoded,the greater the network encoding gain,and the system performance is better than the shortest path routing.(2)A data distribution strategy based on network coding between multiple data streams is proposed.Nodes in the network use network coding to reduce the number of data packet transmissions,thereby reducing the end-to-end transmission delay of the data stream.According to the difference in the delays of multiple paths from the source node to the destination node,the distribution of each path is optimized The amount of data,thereby reducing the delay of packet data in the wireless network.Simulations show that the delay in this method is less than the delay of the shortest single-channel path and the delay of multi-path without considering network coding.