中文摘要：

自由空间激光通信网容易出现的高丢包率和负载不均衡问题,传统的路由最优路径选择方法实现过程复杂,容易受到外界干扰,降低了最优路径选择的准确性。提出一种自由空间激光通信网路由最优路径选择方法。通信网络的链路代价度量进行计算,在此基础上,获取具有较高链路代价的两跳通信信道,选择第k最短路算法获取自由空间激光通信信道的最短路径,对最短路径进行迭代更新,得到不同的最短路径及对应最短跳数,选择跳数最小的路径作为最优路径,完成自由空间激光通信路由的最优路径选择,并利用通信吞吐量作为优化指标,对最优路径选择算法进行改进。仿真实验证明：最优路径优化方法可以减少路由切换的跳数,降低通信网络时延和时间复杂度,大大提高了网络的吞吐量,说明该方法可以提高自由空间激光通信网络的整体性能。

英文摘要：

Free space laser communication network prone to high packet loss rate and the load imbalance problem, the traditional way to select the optimal routing path implementation process is complex, susceptible to interference, reduced the accuracy of the optimal path selection. In this paper, a free space laser communication network routing optimal path selection method. Communication network link cost metric is calculated, based on this, get two hop communication channel with high link cost, choose the first k the short circuit of the shortest path algorithm to obtain the free space laser communication channel, the shortest path for iterative update, get different shortest path and the corresponding shortest hop, choose the path of least hop count as the optimal path, complete the free space laser communication routing optimal path selection, and use the communications throughput as indicators of optimization, to improve the optimal path selection algorithm. Simulation results prove that： in this paper, the optimal path optimization method can reduce the hop routing switch, reduce the communication network time delay and time complexity, greatly improving the network throughput, shows that this method can improve the overall performance of free space laser communication network.