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RWA问题是光网络中的一个核心问题。随着RWA优化算法求解方式的简化,算法的运算效率得到了提高,但却牺牲了解的优化性能。如何使优化效率和时间效率协调统一是当前光网络中RWA优化算法设计的难点。对光网络中动态RWA问题进行了阐述,对基于分层图的动态RWA算法进行了仿真与分析,仿真证明,该算法可以大幅降低网络的阻塞性能,且算法稳定性更好、资源利用率较高。
The RWA issue is a core issue in optical networks. With the simplification of the RWA optimization algorithm, the computational efficiency of the algorithm is improved, but the optimal performance is sacrificed. How to harmonize optimization efficiency and time efficiency is a difficult point in the current design of RWA optimization algorithm in optical networks. The dynamic RWA problem in optical network is expatiated. The dynamic RWA algorithm based on hierarchical graph is simulated and analyzed. The simulation results show that the proposed algorithm can significantly reduce the blocking performance of the network, and the algorithm has better stability and resource utilization ratio high.