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区分可靠性的通路保护方案既能为光网络中具有不同可靠性需求的业务提供有效的故障保护,又能优化网络资源的利用,是一种高效的生存性机制。但目前此类问题的研究主要是集中于传统的单域光网络中,所得的研究成果无法直接运用于具有多域特点的下一代光网络中。针对这一问题,在对以往通路保护算法进行改进的基础上提出了一种适用于多域光网络中的支持区分可靠性的通路保护算法,并对其性能进行了计算机仿真研究。仿真结果表明,该算法不仅能满足多域光网络中不同业务的可靠性需求,而且能提高网络资源的利用率、降低业务连接的阻塞率。
The path protection scheme that differentiates reliability is an efficient survivability mechanism, which can not only provide effective fault protection for services with different reliability requirements in optical networks, but also optimize the utilization of network resources. But at present, the research of such problems mainly focuses on the traditional single-domain optical network. The research results obtained can not be directly applied to the next-generation optical networks with multi-domain features. Aiming at this problem, a new path protection algorithm which is suitable for differentiating reliability in multi-domain optical networks is proposed based on the improvement of previous path protection algorithms. The performance of the path protection algorithm is also studied. The simulation results show that the proposed algorithm can not only meet the reliability requirements of different services in multi-domain optical networks, but also improve the utilization of network resources and reduce the blocking rate of service connections.