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提出一种基于网络编码的车联网数据分发算法.算法没有简单采用传统机会转发方式,而是在转发之前依据车辆的地理位置进行优先级排序,然后将数据包进行网络编码,让每个编码包携带下一跳车辆信息并通过车辆应答实现对下一跳转发车辆的选择,确保了由转发开销最低的下一跳车辆完成数据的转发.同时,给出转发车辆收到的数据包与转发次数的比值,从而确定转发计数器.仿真结果显示,提出的方案能减少不必要的传输行为,有效改善网络性能.
This paper proposes a vehicle networked data distribution algorithm based on network coding.The algorithm does not simply adopt the traditional opportunistic forwarding method but prioritizes the vehicles according to their geographic location prior to forwarding and then encodes the data packets in a network so that each encoded packet Carry the information of the next hop vehicle and realize the selection of the next hop forwarding vehicle through the vehicle response, so as to ensure that the next hop vehicle with the lowest forwarding cost completes the data forwarding.At the same time, the data packets and forwarding received by the forwarding vehicle are given So as to determine the forwarding counter.The simulation results show that the proposed scheme can reduce the unnecessary transmission and improve the network performance effectively.