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提出一种基于流内与流间网络编码的延迟容忍移动传感器网络高效广播传输机制.在该机制中,汇聚节点利用随机线性网络编码将原始数据处理成编码包,然后转发给传感器节点.传感器节点间利用一种优化的机会网络编码算法交换编码包.当传感器节点收到足够多的线性无关编码包时解码得到原始广播数据.理论分析和仿真实验表明,与仅基于随机线性网络编码的广播传输机制相比,该机制能进一步减小广播时延和网络负载.
This paper proposes an efficient broadcast transmission mechanism for delay-tolerant mobile sensor networks based on intra-and inter-network coding, in which the aggregation nodes process the original data into encoded packets using random linear network coding and then forward them to the sensor nodes. An optimized opportunistic network coding algorithm is used to exchange the encoded packets.The sensor nodes receive the original broadcast data when it receives enough linearly independent encoded packets.The theoretical analysis and simulation results show that compared with the broadcast transmission based on the random linear network coding Compared with the mechanism, this mechanism can further reduce the broadcast delay and network load.