在波长路由WDM网络中,波长路由和波长分配是RWA算法提高光网络阻塞性能的两个重要阶段和关键技术。文章针对现有的稀疏分光配置约束下的光网络多播RWA算法复杂度高、代价高的问题,提出了一种新的稀疏分光器配置的RWA多播算法。该算法摒弃传统RWA算法在波长路由阶段就考虑稀疏分光约束能力的惯性思维,论文首次提出在波长分配阶段,才通过多播长转换器实现满足稀疏分光约束条件的分光能力传递。仿真结果表明,所提算法在平均代价和所需波长数目方面都获得了较优的性能。 In wavelength-routed WDM networks, wavelength routing and wavelength allocation are two important stages and key technologies of RWA algorithm to improve optical network congestion performance. Aiming at the high complexity and high cost of optical network multicast RWA algorithm under the constraints of existing sparse optical splitting configuration, a new RWA multicast algorithm with sparse optical splitter configuration is proposed. This algorithm abandons the inertial thinking that the traditional RWA algorithm considers the sparse spectral splitting constraint in the wavelength routing stage. The paper proposes for the first time in the wavelength allocation phase that the multicast SPV can meet the requirements of sparse splitting splitting. The simulation results show that the proposed algorithm achieves better performance in terms of average cost and the required number of wavelengths.