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        軟件定義網(wǎng)絡(luò)中一種按需路徑分配的定量評估模型

        2016-07-09 08:36:32王春枝羅晨陳宏偉
        軟件導(dǎo)刊 2016年6期

        王春枝 羅晨 陳宏偉

        摘要:軟件定義網(wǎng)絡(luò)(SDN)技術(shù)分離了傳統(tǒng)網(wǎng)絡(luò)的控制層面與數(shù)據(jù)層面,目的是改造現(xiàn)有網(wǎng)絡(luò),簡化網(wǎng)絡(luò)操作,提升網(wǎng)絡(luò)性能。利用SDN的集中式控制,提出一種路徑分配的定量評估模型。首先根據(jù)網(wǎng)絡(luò)的物理狀態(tài)進行建模,從概率的角度使用馬爾科夫鏈計算網(wǎng)絡(luò)鏈路的重要性;然后在模型中同時考慮鏈路利用率、資源分配率、負(fù)載均衡和延時作為路徑分配評價指標(biāo);最后根據(jù)不同需求對路徑分配進行評估,得到最合適的路徑分配方案,并用一個實例介紹了模型運作流程。實驗結(jié)果表明,該方法可以按需供給,起到流量優(yōu)化與負(fù)載均衡的效果。

        關(guān)鍵詞:軟件定義網(wǎng)絡(luò);馬爾科夫鏈;定量評估;路徑分配

        DOIDOI:10.11907/rjdk.161135

        中圖分類號:TP393文獻標(biāo)識碼:A文章編號:1672-7800(2016)006-0179-05

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