頻譜可用性和保護帶寬共享度感知的彈性光網(wǎng)絡(luò)生存性多路徑策略

劉煥淋; 張明佳; 陳勇; 王欣

doi:10.11999/JEIT161374

頻譜可用性和保護帶寬共享度感知的彈性光網(wǎng)絡(luò)生存性多路徑策略

doi: 10.11999/JEIT161374

1.
(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 400065) ②(重慶郵電大學(xué)自動化學(xué)院重慶 400065)

基金項目:

國家自然科學(xué)基金(61275077, 61571072)，重慶市基礎(chǔ)與前沿研究項目(2015jcyjA40024)

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- 文章訪問數(shù): 1478
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2016-12-16
- 修回日期: 2017-03-23
- 刊出日期: 2017-10-19

Survivable Multipath Strategy Based on Spectrum Availability and Protection Bandwidth Sharing Degree-aware for Elastic Optical Networks

1.
(Key Laboratory of Optical Communications and Networks, Chongqing University of Posts and Telecommunications, Chongqing 400065, China)
2.
(School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China)

Funds:

The National Natural Science Foundation of China (61275077, 61571072), The Basic and Frontier Research Program of Chongqing (2015jcyjA40024)

摘要

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。
- 彈性光網(wǎng)絡(luò) /
- 生存性路由 /
- 共享度 /
- 重配置 /
- 帶寬阻塞率
Abstract: In order to address the problems of the low Spectrum Utilization (SU) and the high Bandwidth Blocking Probability (BBP), a survivable Multipath strategy based on Sharing Degree of protection bandwidth and Spectrum Availability-Aware (M-SDSAA) is proposed. Firstly, the single-path routing is used to transmit the request. The first fit and last fit methods are adopted according to the request duration for the working path Routing and Spectrum Assignment (RSA). A link weight value is designed in accordance with the size of sharable spectrum block. Secondly, the multipath RSA mechanism is used to transmit the request when the single-path RSA fails. The multipath RSA adaptively chooses multiple paths priority with less number of spectrum slots to transmit the request. A shared light-path protection mechanism is used for the multipath provision. Lastly, a reprovisioning mechanism is proposed to further reduce the BBP when the request is blocked. This mechanism reconfigures the blocked request from the sub-optimal protection path to the optimal path occupied minimum protection bandwidth. The simulation results show that the M-SDSAA can improve the SU and decrease the BBP.
- Elastic optical networks /
- Survivable routing /
- Sharing degree /
- Reprovisioning /
- Bandwidth Blocking Probability (BBP)

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參考文獻(15)

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