彈性光網(wǎng)絡(luò)中面向可靠性的鏈路故障概率保護(hù)與保護(hù)資源重配置策略

劉煥淋; 杜君丹; 易鵬飛; 陳勇; 張明佳

doi:10.11999/JEIT170150

彈性光網(wǎng)絡(luò)中面向可靠性的鏈路故障概率保護(hù)與保護(hù)資源重配置策略

doi: 10.11999/JEIT170150

1.
(重慶郵電大學(xué)光纖通信技術(shù)與網(wǎng)絡(luò)重點(diǎn)實(shí)驗(yàn)室重慶 400065) ②(重慶郵電大學(xué)自動(dòng)化學(xué)院重慶 400065)

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(61275077)，重慶市科委基礎(chǔ)與前沿研究項(xiàng)目(2015jcyjA40024)

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出版歷程
- 收稿日期: 2017-02-24
- 修回日期: 2017-07-14
- 刊出日期: 2017-11-19

Reliability-oriented Links Failure Probability Protection and Backup Reprovisioning Strategy 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), The Basic and Frontier Research Program of Chongqing (2015jcyjA40024)

摘要

摘要: 為解決彈性光網(wǎng)絡(luò)中多鏈路故障保護(hù)的高保護(hù)資源冗余度問(wèn)題，該文提出一種面向可靠性的多鏈路故障概率保護(hù)與保護(hù)資源重配置(ROPP-BR)策略。在ROPP-BR策略中，該文綜合考慮頻譜資源消耗和鏈路故障概率，分別設(shè)計(jì)了工作與保護(hù)路徑的鏈路代價(jià)函數(shù)，以較小代價(jià)分別選擇業(yè)務(wù)可靠性高且頻譜資源消耗少的備選工作與保護(hù)光路。為滿(mǎn)足業(yè)務(wù)差異化的可靠性需求，ROPP-BR策略設(shè)計(jì)了一種面向可靠性的概率保護(hù)機(jī)制，建立了業(yè)務(wù)可靠性評(píng)估模型，在滿(mǎn)足業(yè)務(wù)的可靠性需求的限制下靈活地配置概率保護(hù)路徑。當(dāng)業(yè)務(wù)將要被阻塞時(shí)，該文提出一種基于極大團(tuán)的保護(hù)光路重配置方法，對(duì)網(wǎng)絡(luò)中的業(yè)務(wù)保護(hù)資源進(jìn)行重配置，提高保護(hù)頻隙的共享度。仿真表明，所提策略兼顧了帶寬阻塞率與可靠性性能，有效地降低了保護(hù)資源冗余度。
- 彈性光網(wǎng)絡(luò) /
- 多鏈路故障 /
- 概率保護(hù) /
- 可靠性 /
- 保護(hù)重配置
Abstract: Due to the high resource redundancy of full protection for requests multi-link failure in elastic optical networks, a strategy of Reliability Oriented Probability Protection and Backup Reprovisioning (ROPP-BR) is proposed. In the ROPP-BR, an adaptive adjustment working and protection link cost functions are devised to effectively select the alternative working and protection light-paths respectively which have high reliability and consume a small amount of spectrum resources in the multi-link failure. The cost function sufficiently considers the spectrum resources consumption and the link failure probability for both working and protection paths. Meanwhile, in order to satisfy the differentiated reliability requirements, a reliability oriented probability protection mechanism is introduced. And a theoretical analysis model is established to estimate the service reliability for light- paths in optical networks with probability protection, so the probability protection path can be flexibly configured under the restriction of the reliability requirements of the request. Moreover, for further improving protection sharing efficiency, when the request will be blocked for shortage of idle spectrum resource, a backup reprovisioning method based on maximum clique, is put forward to reconfigure the protection paths and spectrum resources. The simulation results indicate that the proposed ROPP-BR strategy can synthetically consider the performance of bandwidth blocking probability and service reliability, and effectively reduce the redundancy of protection resources.
- Elastic optical networks /
- Multi-link failure /
- Probability protection /
- Reliability /
- Backup reprovisioning

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參考文獻(xiàn)(13)

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