最小故障風(fēng)險(xiǎn)損失的彈性光網(wǎng)絡(luò)多鏈路故障概率保護(hù)策略

劉煥淋; 易鵬飛; 張明佳; 陳勇

doi:10.11999/JEIT161159

最小故障風(fēng)險(xiǎn)損失的彈性光網(wǎng)絡(luò)多鏈路故障概率保護(hù)策略

doi: 10.11999/JEIT161159

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)，重慶市教委基金(KJ 1400421)，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: 2016-10-28
- 修回日期: 2017-03-17
- 刊出日期: 2017-08-19

Multi-link Failure Probability Protection Strategy Based on Minimum Fault Risk Loss in 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 Scientific Research Fund of Chongqing Municipal Commission (KJ1400421), The Basic and Frontier Research Program of Chongqing (2015jcyjA40024)

摘要

摘要: 針對(duì)彈性光網(wǎng)絡(luò)中多鏈路故障100%保護(hù)的資源消耗冗余度較高的問(wèn)題，該文提出一種最小故障風(fēng)險(xiǎn)損失的概率保護(hù)(MFRL-PP)策略，在多鏈路故障時(shí)為業(yè)務(wù)提供高效率的概率保護(hù)。在MFRL-PP策略中，該文設(shè)計(jì)了一個(gè)綜合考慮鏈路負(fù)載和故障風(fēng)險(xiǎn)的代價(jià)函數(shù)，為業(yè)務(wù)選擇故障風(fēng)險(xiǎn)小且頻譜資源消耗少的概率保護(hù)光路。當(dāng)最小故障風(fēng)險(xiǎn)路徑無(wú)法傳輸時(shí)，為進(jìn)一步降低概率保護(hù)光路的故障風(fēng)險(xiǎn)損失，該文還設(shè)計(jì)了一種非對(duì)稱業(yè)務(wù)流分流的最小故障風(fēng)險(xiǎn)損失概率保護(hù)機(jī)制，以便選擇故障風(fēng)險(xiǎn)損失最小的分流路徑組作為傳輸光路。同時(shí)，在傳輸光路的頻譜分配階段，提出了基于最大頻譜重合度的可用頻譜塊選擇策略，以減少頻譜碎片的產(chǎn)生。仿真結(jié)果表明所提策略不僅有效地提升了頻譜利用率，還較好地實(shí)現(xiàn)了帶寬阻塞率與故障風(fēng)險(xiǎn)的平衡。
- 彈性光網(wǎng)絡(luò) /
- 多鏈路故障 /
- 最小故障風(fēng)險(xiǎn)損失 /
- 非對(duì)稱業(yè)務(wù)流 /
- 帶寬阻塞率
Abstract: Due to the high resource redundancy of full protection for requests multi-link failure in elastic optical networks, the strategy of Minimum Fault Risk Loss Probability Protection (MFRL-PP) is proposed to protect the request with high spectrum-efficiency. In the MFRL-PP, a link cost function integrated considering the link payload and fault risk is designed to choose the protection lightpath, which has minimum fault risk and consumes a small amount of spectrum resource. When the minimum fault risk lightpath is unavailable for shortage of idle spectrum resource, for further reducing the failure risk of the probability protection lightpath, a minimum fault risk loss probability protection mechanism for the non-symmetrical flow is designed to split the flow into two sub-flows for easily selecting the protection branch lightpath with the minimum fault risk loss. Moreover, in the phase of spectrum allocation for the lightpath, for reducing the number of spectrum fragmentations, a spectrum allocation strategy based on the maximum spectrum coincidence degree is put forward to allocate spectrum resource. The simulation results indicate that the proposed MFRL-PP algorithm can improve the spectrum utilization, and provide a better tradeoff between the bandwidth blocking probability and fault risk degree.
- Elastic optical networks /
- Multi-link failure /
- Minimum fault risk loss /
- Non symmetrical traffic flow /
- Bandwidth blocking probability

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參考文獻(xiàn)(16)

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