Dynamic Network Coding for Multiple Sessions Based on Flow Gain

This paper proposes a dynamic coding policy (MSNC) which allows network coding applied across multiple sessions and develops a necessary condition for MSNC by denoting the benefit gaining from coding. With MSNC, intermediate nodes can independently judge whether the coding operation is appropriate and easily decide which packet to transmit among the incoming flows. To make the network coding feasible in practic, a control mechanism for an intermediate node is presented, which illustrates the operations for the incoming packet flows. Simulation results demonstrate the advantage of MSNC in terms of both throughput and fairness.