串?dāng)_感知的空分彈性光網(wǎng)絡(luò)頻譜轉(zhuǎn)換器稀疏配置和資源分配方法

劉煥淋; 杜理想; 陳勇; 胡會霞

doi:10.11999/JEIT190533

串?dāng)_感知的空分彈性光網(wǎng)絡(luò)頻譜轉(zhuǎn)換器稀疏配置和資源分配方法

doi: 10.11999/JEIT190533 cstr: 32379.14.JEIT190533

1.
重慶郵電大學(xué)通信與信息工程學(xué)院重慶 400065
2.
重慶郵電大學(xué)工業(yè)物聯(lián)網(wǎng)與網(wǎng)絡(luò)化控制教育部重點實驗室重慶 400065

基金項目: 國家自然科學(xué)基金(51977021)；重慶市自然科學(xué)基金面上項目(2019jcyj-msxmX0613)

詳細(xì)信息

作者簡介:
劉煥淋：女，1970年生，教授，研究方向為光通信技術(shù)與網(wǎng)絡(luò)

杜理想：男，1995年生，碩士，研究方向為光網(wǎng)絡(luò)路由算法

陳勇：男，1963年生，教授，研究方向為光通信與傳感檢測

胡會霞：女，1997年生，碩士，研究方向為光網(wǎng)絡(luò)調(diào)度算法

通訊作者:
劉煥淋　liuhl2@sina.com

中圖分類號: TN929.11
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出版歷程
- 收稿日期: 2019-07-15
- 修回日期: 2019-11-07
- 網(wǎng)絡(luò)出版日期: 2020-03-17
- 刊出日期: 2020-07-23

Crosstalk-aware Spectrum Converters Sparse Configuration and Resource Allocation for Space Division Multiplexing Elastic Optical Networks

1.
School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
2.
Key Laboratory of Industrial Internet of Things and Networked Control, Ministry of Education, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Funds: The National Natural Science Foundation of China(51977021), The Science Foundation Project of Chongqing Science and Technology Commission (2019 jcyj-msxmX0613)

摘要

摘要:
針對大容量多芯光纖空分復(fù)用彈性光網(wǎng)絡(luò)(SDM-EON)中芯間串?dāng)_導(dǎo)致業(yè)務(wù)傳輸質(zhì)量下降和阻塞率上升的問題，該文提出了節(jié)點稀疏配置頻譜轉(zhuǎn)換器降低芯間串?dāng)_的路由纖芯頻譜分配方法。該方法根據(jù)網(wǎng)絡(luò)中節(jié)點中介中心性稀疏配置頻譜轉(zhuǎn)換器。在業(yè)務(wù)路由階段，設(shè)計綜合考慮光路負(fù)載和節(jié)點頻譜轉(zhuǎn)換能力的光路選擇的權(quán)重方法；為了降低串?dāng)_，在纖芯頻譜分配階段，設(shè)計纖芯分組和頻譜分區(qū)分配方法；最后，針對串?dāng)_較大的業(yè)務(wù)，采用頻譜轉(zhuǎn)換以降低業(yè)務(wù)串?dāng)_和改善帶寬阻塞率。仿真結(jié)果表明，所提算法能有效地提高頻譜利用率，降低因芯間串?dāng)_導(dǎo)致的帶寬阻塞率。
- 空分復(fù)用彈性光網(wǎng)絡(luò) /
- 芯間串?dāng)_ /
- 頻譜轉(zhuǎn)換器 /
- 纖芯路由頻譜分配 /
- 帶寬阻塞率
Abstract:
In order to solve the problem of inter-core crosstalk in Space Division Multiplexing Elastic Optical Network (SDM-EON), which leads to the decline of service transmission quality and the increase of blocking probability, a routing, fiber core and spectrum allocation method for reducing inter-core crosstalk through sparse configuration spectrum converter at nodes is proposed in the paper. This method configures the spectrum converter according to the node’s centrality sparseness in SDM-EON. During service routing, a weighting method for optical path selection considering both optical path load and node spectrum conversion capability is designed.to reduce crosstalk. In the core spectrum allocation stage, a method of fiber core grouping and spectrum partition allocation is utilized. Finally, spectrum conversion is used to reduce traffic crosstalk and improve bandwidth blocking probability for services with high crosstalk. The simulation results show that the proposed algorithm can effectively improve the spectrum utilization and reduce the bandwidth blocking probability caused by fibers inter-core crosstalk.
- Space Division Multiplexing Elastic Optical Network (SDM-EON) /
- Inter-core crosstalk /
- Spectrum converter /
- Fiber core and routing spectrum allocation /
- Bandwidth blocking probability

HTML全文

圖 1 節(jié)點稀疏配置頻譜轉(zhuǎn)換器的路由示意圖

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圖 2 仿真網(wǎng)絡(luò)拓?fù)?/p>

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圖 3 不同網(wǎng)絡(luò)負(fù)載下4種算法的帶寬阻塞率

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圖 4 不同網(wǎng)絡(luò)負(fù)載下4種算法的頻譜利用率

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圖 5 與KSP-FF算法對比的各算法的XT改善率

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表 1 NSCC-XT-RSCA算法

(1) 預(yù)處理階段，根據(jù)式(2)計算網(wǎng)絡(luò)拓?fù)渌泄?jié)點的中介中心性，根據(jù)給定的比例選取節(jié)點作為SC⁺節(jié)點配置頻譜轉(zhuǎn)換器；根據(jù)2.4節(jié)所述　　將纖芯頻譜進(jìn)行分組和分區(qū)；
(2) 業(yè)務(wù)請求到達(dá)后，確定業(yè)務(wù)調(diào)制格式，并計算業(yè)務(wù)在該調(diào)制格式所需頻隙數(shù)；
(3) 根據(jù)光路權(quán)重公式(3)，計算源、目的節(jié)點間K條候選最短長度光路權(quán)重，根據(jù)權(quán)值對候選光路進(jìn)行降序排序，設(shè)變量k=1；
(4) 判斷第k條光路上是否存在滿足業(yè)務(wù)傳輸?shù)目捎妙l譜塊，如有，轉(zhuǎn)步驟(7)，否則，轉(zhuǎn)步驟(5)；
(5) 判斷光路上是否有SC⁺節(jié)點，如有，則轉(zhuǎn)步驟(6)，否則，轉(zhuǎn)步驟(8)；
(6) 判斷光路是否有經(jīng)過SC⁺節(jié)點轉(zhuǎn)換的可用頻譜塊，若有，轉(zhuǎn)步驟(7)，否則，轉(zhuǎn)步驟(8)；
(7) 根據(jù)式(4)～式(6)計算光路上的纖芯頻譜分配成本C^P，確定頻譜塊，轉(zhuǎn)步驟(9)；
(8) 若k>K，則業(yè)務(wù)被阻塞；否則，令k加1，轉(zhuǎn)步驟(4)；
(9) 判斷$\left\lceil { {C^p} } \right\rceil \ge {H_p}$?若是，則業(yè)務(wù)在光路p上受串?dāng)_影響較大，p=1, 2, ···, k，轉(zhuǎn)步驟(10)，否則轉(zhuǎn)步驟(16)；
(10) 根據(jù)式(1)計算業(yè)務(wù)所受串?dāng)_，若該串?dāng)_小于串?dāng)_閾值條件，則轉(zhuǎn)步驟(16)，否則，轉(zhuǎn)步驟(11)；
(11) 判斷光路上是否有SC⁺節(jié)點，若有，轉(zhuǎn)步驟(12)，否則，阻塞業(yè)務(wù)；
(12) 判斷光路是否存在能降低XT值的頻譜塊，若有，轉(zhuǎn)步驟(14)，否則，轉(zhuǎn)步驟(13)；
(13) 判斷光路信號是否為最低調(diào)制格式，如是，則阻塞業(yè)務(wù)，否則，降低調(diào)制格式，減少業(yè)務(wù)需求的頻譜塊數(shù)目，轉(zhuǎn)步驟(2)；
(14) 判斷是否存在2個及以上節(jié)點為SC⁺節(jié)點，如有，轉(zhuǎn)步驟(15)，否則，轉(zhuǎn)步驟(10)；
(15) 根據(jù)式(7)計算各SC⁺節(jié)點的使用排名，選取排名高的節(jié)點使用SC⁺功能，轉(zhuǎn)步驟(10)；
(16) 業(yè)務(wù)成功傳輸，輸出業(yè)務(wù)所選擇的光路p、纖芯編號、頻譜資源以及SC⁺節(jié)點頻譜轉(zhuǎn)換要求。

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