说明：  k最短路径实现 用K条最短路径来优化网络传输方式，提高网络的实时性，是在Dijkstra最短路径的基础上，优化备选路径的生成方式，提高信息传输速度。在中继节点故障的情况下，放弃最短路径，使用源节点的次最短路径进行信息传输，而不使用故障节点的前一节点的次最短路径。
(K shortest path implementation The shortest path of K bar is used to optimize the network transmission mode and improve the real-time performance of the network. On the basis of the shortest path of Dijkstra, optimize the generation mode of the alternative path and improve the information transmission speed.In the case of the failure of the relay node, the shortest path is given, and the shortest path of the first node of the failure node is not used.)