针对光突发交换(OBS)网络中已有的包括抢占和波长分离等服务质量(QoS)保证机制的不足,提出了一种改进的基于QoS的标签交换路径LSP共享(QLS)算法.算法通过链路波长资源的统计复用,在保证高优先级业务传送可靠性和有效性的同时,提升低优先级业务的QoS性能.使用开源离散事件仿真软件OMNeT++搭建了OBS/GMPLS仿真平台,对4×4对称型MESH网络和NSFNET网络分别采用WP算法和QLS算法进行了仿真.结果表明,QLS算法对于高QoS等级业务性能影响极小,MESH和NSFNET网络中class3业务的丢包率分别减少了近0.2和0.3,平均丢包率分别减少了约0.05和0.1.
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