A New Network Coding Structure and Its Application on CERNET Backbone

This paper proposes a new ring structure of network coding (RSNC) based on existing network coding topology, enlarging the field of application and reducing the complexity of coding. On the basis of real-time monitoring and dynamic allocation for network bandwidth, RSNC is applied to the CERNET backbone network. The route of the packet is decided by the source node when it sends data packet and it is written into the packet header. The intermediate node retransmits following this route. When the network topology changes, the whole network topology will be updated, and the sparse routing tree of the whole network will be sent. Hence, each node knows the connection relationship of the whole network. NS simulation result indicates that utilization of the ring topology structure we proposed can realize the network coding and improve the network throughput rate and utilization rate of bandwidth.