多域光网络中一种支持区分可靠性的通路保护算法

A Path Protection Algorithm with Differentiated Reliability in Multi-Domain Optical Networks

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。

Path protection with differentiated reliability is a very promising survivable scheme in optical networks. It can meet the requirement of network traffics with different reliability demand in a resource efficient manner. This issue has been researched mainly in single-domain optical networks, however, its achievement can not be applied to next generation optical network directly, which is accepted to be a multi-domain optical netwrok. Therefore a path protection algorithm with differentiated reliability in multi-domain optical networks is proposed in this paper. And its performance is evaluated through simulation, which verifies that the algorithm can not only meet the reliability demand of different traffics in multi domain optical networks, but also improve the network resource efficiency and reduce the traffic blocking probability.