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OTN 組網技術在電力通信網中的應用

熱度0票  瀏覽57次 時間:2018年7月27日 10:59
  要:OTN 組網技術可以增強業務擴展能力和網絡監控性能,滿足實時控制、智能分析、動態計算等功能。隨著電力通信行業的高速發展,OTN 組網技術在電網建設過程中得到了普遍應用。基于此,文章簡要說明了 OTN 組網技術的概況和特點,重點對 OTN 組網技術在電力通信網中的應用進行了研究。
  關鍵詞:OTN 技術;電力通信;組網模式;應用中圖分類號:TM73 文獻標識碼:A 文章編號:1673-1131(2015)10-0185-01.
  0 引言
  隨著電力通信行業的高速發展,為了滿足多業務傳送需求,光傳送網 OTN(Optical Transport Network)技術在電力通信行業得到了廣泛應用[1]。OTN 技術在電力通信網中的應用主要是以波分復用技術作為通信基礎,具有較強的運維能力和保護能力,并且傳輸速率較快。因此,OTN 組網技術在電網建設過程中得到了普遍應用,滿足實時控制、智能分析、動態計算等功能。
  1 OTN 組網技術概述與特點
  OTN 又稱 OTH,是新一代光傳輸技術[2],其具有數字傳輸的容量大和成本低等優點,并且解決了業務調度不足問題,增加了實時控制、智能分析、動態計算等功能。在 IP業務的超大帶寬以及超長距離通信時,OTN 技術具有較強的優勢,是未來傳輸網的發展方向。光域方面,OTN 將光域分為傳送、光復用、信道三個層面,支持光層運維和管理功能,并且對帶內和帶外兩層進行管理控制。電域方面,OTN 技術可以確定外故障點,并且具有良好的管理監視和波分復用功能,可以傳送 10G、40G 等業務,支持級聯監視功能。
  作為超大容量組網技術,OTN 技術具有明確的節點和鏈路,能夠實現在電域和光域的波長交叉調度,具有大顆粒寬帶傳輸特點,具備交叉能力和業務保護能力的超大容量傳輸網絡,大顆粒寬帶業務可以確保速率在 10Gb/s 以上傳輸。OTN 組網技術的核心層采用通道混傳技術,構建成Mesh網絡架構[3]。
  接入層采用電交叉,構建出環形結構,環網下掛在核心層網絡,方便業務的開展以及調度。
  2 OTN 組網技術在電力通信網中的應用
  2.1 組網模式的應用研究
  如圖 1 所示,OTN 組網在核心層借助大顆粒寬帶傳輸進行交叉調度,通過以太網物理接口實現業務承載。通過優先級調度和帶寬管理工作后,接入層以物理接口方式將數據傳送至核心層設備,核心層將其封裝并進行網絡配置以及管理。接入層可以靈活接入各種業務,實現多種業務在同一波道的傳輸,提升利用率。OTN 組網可以承載各種數據業務,滿足未來業務發展的擴容需求[4],具備交叉能力和業務保護能力,能夠為將來電力通信網絡發展提供良好的保障。
  圖 1 OTN 組網模式
  2.2 OTN 應用研究
  電力通信網絡中將超大量的業務數據匯聚到中心IDC,因此,在 OTN 應用中,需要進行分層建設,網絡分為核心層、匯聚層和接入層,根據變電站地理位置建立核心層網絡架構,各個地區供電局為接入點,接入到核心層網絡。OTN 組網技術的核心層采用通道混傳技術,構建成 Mesh 網絡架構。接入層采用電交叉,構建出環形結構,環網下掛在核心層網絡,方便業務的開展以及調度。
  3 結語
  OTN可以解決業務調度不足問題,同時增加了實時控制、智能分析、動態計算等功能。在光域方面,OTN 技術支持光層運維和管理功能,并且可對帶內和帶外兩層進行管理控制;在電域方面,OTN技術又具有良好的管理監視和波分復用功能。
  OTN 組網技術的核心層采用通道混傳技術,構建成 Mesh 網絡架構;接入層采用電交叉,構建出環形結構,環網下掛在接入層網絡,這些功能能夠滿足未來業務發展的擴容需求,具備交叉能力和業務保護能力,為將來電力通信網絡發展提供良好的保障。
  參考文獻:
  [1] 劉雁斌, 鄧澤榮.廣東聯通本地 OTN 規劃原則與設計思路[J]. 郵電通信技術, 2012(3):55-57.
  [2] 王曄,苗臣冠.新一代傳送網 OTN[J]. 通信技術, 2009, 42(5):152-154.
  [3] 劉玉潔, 肖峻,丁熾武,等.OTN 最新研究進展及關鍵技術[J].光通信技術,2009(6):1- 3.
  [4] 張國新,李昀,葉春.OTN技術與組網應用[J]. 光通信技術.2010(4):15- 17



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