频谱可用性和保护带宽共享度感知的弹性光网络生存性多路径策略
发布时间：2018-07-31 16:18
【摘要】：针对弹性光网络频谱利用率降低和带宽阻塞率高等问题,该文提出一种频谱可用性和保护带宽共享度感知的生存性多路径策略(M-SDSAA)。首先,该策略对业务采用单路径路由,通过区分业务的持续时间,分别采用首次命中和末端命中的工作路径频谱分配方式,并且为不同大小共享频谱块设定不同链路权重值。若单路径路由或频谱分配失败,引入多路径传输策略,自适应选择消耗频隙数少的策略,并且引入共享保护机制,提高保护带宽共享度。最后,当业务阻塞时,且存在单路径业务的保护路径预置在频隙消耗次优的路径,则启动重配置机制进一步降低阻塞率,将该业务重配置到保护频隙消耗最少的路径。仿真结果表明所提算法能有效地提高频谱利用率,降低网络的带宽阻塞率。
[Abstract]:Aiming at the problems of low spectrum efficiency and high bandwidth blocking rate in elastic optical networks, this paper proposes a survivability multipath strategy (M-SDSAA) for spectrum availability and bandwidth sharing awareness. First of all, the strategy uses single-path routing for services. By distinguishing the service duration, the first hit and end-hit working path spectrum allocation is adopted respectively, and different link weights are set for different size shared spectrum blocks. If the single path routing or spectrum allocation fails, the multipath transmission strategy is introduced, and the strategy with less frequency slots is adaptively selected, and the sharing protection mechanism is introduced to improve the sharing degree of the protection bandwidth. Finally, when the traffic is blocked and the protection path of the single-path traffic is preset in the sub-optimal path, the reconfiguration mechanism can further reduce the blocking rate and reconfigure the service to the path with the least protection frequency slot consumption. Simulation results show that the proposed algorithm can effectively improve the spectral efficiency and reduce the bandwidth blocking rate of the network.
【作者单位】： 重庆邮电大学光纤通信技术与网络重点实验室;重庆邮电大学自动化学院;
【基金】：国家自然科学基金(61275077,61571072) 重庆市基础与前沿研究项目(2015jcyj A40024)~~
【分类号】：TN929.1
，
本文编号：2156125
[Abstract]:Aiming at the problems of low spectrum efficiency and high bandwidth blocking rate in elastic optical networks, this paper proposes a survivability multipath strategy (M-SDSAA) for spectrum availability and bandwidth sharing awareness. First of all, the strategy uses single-path routing for services. By distinguishing the service duration, the first hit and end-hit working path spectrum allocation is adopted respectively, and different link weights are set for different size shared spectrum blocks. If the single path routing or spectrum allocation fails, the multipath transmission strategy is introduced, and the strategy with less frequency slots is adaptively selected, and the sharing protection mechanism is introduced to improve the sharing degree of the protection bandwidth. Finally, when the traffic is blocked and the protection path of the single-path traffic is preset in the sub-optimal path, the reconfiguration mechanism can further reduce the blocking rate and reconfigure the service to the path with the least protection frequency slot consumption. Simulation results show that the proposed algorithm can effectively improve the spectral efficiency and reduce the bandwidth blocking rate of the network.
【作者单位】： 重庆邮电大学光纤通信技术与网络重点实验室;重庆邮电大学自动化学院;
【基金】：国家自然科学基金(61275077,61571072) 重庆市基础与前沿研究项目(2015jcyj A40024)~~
【分类号】：TN929.1
，
本文编号：2156125
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