Network coding was proposed in 2000 by Rudolf Ahlswede et al in The Chinese University of Hong Kong, and soon the whole world paid attention to the subject. Because the idea of network coding changed the traditional way of store and forward routing architecture.First proposed that packet can be sent after it was encoded by the intermediate node .The routing of this way fully enhance the bandwidth utilization, so that the destination node can receives the maximum flow rate which determined by the max flow- m...