【摘要】：針對彈性光網(wǎng)絡(luò)頻譜利用率降低和帶寬阻塞率高等問題,該文提出一種頻譜可用性和保護帶寬共享度感知的生存性多路徑策略(M-SDSAA)。首先,該策略對業(yè)務(wù)采用單路徑路由,通過區(qū)分業(yè)務(wù)的持續(xù)時間,分別采用首次命中和末端命中的工作路徑頻譜分配方式,并且為不同大小共享頻譜塊設(shè)定不同鏈路權(quán)重值。若單路徑路由或頻譜分配失敗,引入多路徑傳輸策略,自適應(yīng)選擇消耗頻隙數(shù)少的策略,并且引入共享保護機制,提高保護帶寬共享度。最后,當(dāng)業(yè)務(wù)阻塞時,且存在單路徑業(yè)務(wù)的保護路徑預(yù)置在頻隙消耗次優(yōu)的路徑,則啟動重配置機制進一步降低阻塞率,將該業(yè)務(wù)重配置到保護頻隙消耗最少的路徑。仿真結(jié)果表明所提算法能有效地提高頻譜利用率,降低網(wǎng)絡(luò)的帶寬阻塞率。
[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.
【作者單位】： 重慶郵電大學(xué)光纖通信技術(shù)與網(wǎng)絡(luò)重點實驗室;重慶郵電大學(xué)自動化學(xué)院;
【基金】：國家自然科學(xué)基金(61275077,61571072) 重慶市基礎(chǔ)與前沿研究項目(2015jcyj A40024)~~
【分類號】：TN929.1
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本文編號：2156125