基于负载均衡的激光通信网络动态路由策略

Dynamic routing strategy of laser communication network based on load balancing

针对当前策略在执行激光通信网络数据包转发任务时,忽略了节点任务负载、数据包传输距离,以及数据包转发次数等因素影响,导致数据包递交成功率不高、延时较长、路由开销较大、节点生存时间较短,提出了基于负载均衡的激光通信网络动态路由策略,在考虑激光通信网络簇首节点数据聚集能力受限的情况,以最小化网络总能耗为目标,同时结合遗传算法计算最优分簇数目;在此基础上,根据节点剩余能量,距离簇内质心的距离,以及节点通信覆盖度选取簇首节点,采用剩余能量预测机制估计簇首阶段转发数据包的能量消耗,同时利用节点任务负载指数评价激光通信网络各节点任务负载不平衡程度,根据计算结果设计了簇间多跳路由机制,实现了激光通信网络动态路由。仿真对比测试结果表明,所提策略能够实现激光通信网络动态路由,克服了当前路由策略存在的弊端,有效提高了数据包递交成功率,减小了延时和路由开销,同时延长了节点生存时间。

When performing the laser communication network packet forwarding task for the current strategy,the impact of the node task load,the packet transmission distance,and the number of packet forwarding times are neglected,resulting in low packet delivery success rate,long delay,routing overhead,and shorter node survival time,a dynamic routing strategy based on load balancing for laser communication networks is proposed.Considering the limited data aggregation ability of the cluster head node in the laser communication network,the goal is to minimize the total energy consumption of the network.The genetic algorithm calculates the optimal number of clusters.On this basis,the cluster head node is selected according to the residual energy of the node,the distance from the centroid in the cluster,and the node communication coverage.The residual energy prediction mechanism is used to estimate the energy of the packet in the first stage of the cluster.At the same time,the node task load index is used to evaluate the imbalance of each node in the laser communication network.According to the calculation result,the inter-cluster multi-hop routing mechanism is designed to realize the dynamic routing of the laser communication network.The simulation comparison test results show that the proposed strategy can realize dynamic routing of laser communication network,overcome the shortcomings of current routing strategy,effectively improve the success rate of packet delivery,reduce delay and routing overhead,and prolong node lifetime.