Designing Real-Time Transmission Mode for Multi-Path Communication Systems

In communication systems, multi-path transmission could improve spectrum efficiency and reduce time delay markedly. In this paper, two transmission modes which employ the network coding and the data allocating jointly are proposed for multi-path communication systems, called the data allocating and network coding (DANC) mode and network coding and data allocating (NCDA) mode. The big different is, the former allocates data to each feasible path and then does network coding, while the latter swaps the order of two operations. Corresponding optimization problem are solved with an iterative process based on traditional branch and bound algorithm. The qualitative analyses of the operation order, reasons for the performance gap and advantages of different modes are also provided. Simulation results under different conditions demonstrate that the proposed transmission methods could improve the time delay performance effectively.