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(jiǎn)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(píng)估模型。首先根據(jù)網(wǎng)絡(luò)的物理狀態(tài)進(jìn)行建模,從概率的角度使用馬爾科夫鏈計(jì)算網(wǎng)絡(luò)鏈路的重要性;然后在模型中同時(shí)考慮鏈路利用率、資源分配率、負(fù)載均衡和延時(shí)作為路徑分配評(píng)價(jià)指標(biāo);最后根據(jù)不同需求對(duì)路徑分配進(jìn)行評(píng)估,得到最合適的路徑分配方案,并用一個(gè)實(shí)例介紹了模型運(yùn)作流程。實(shí)驗(yàn)結(jié)果表明,該方法可以按需供給,起到流量?jī)?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(píng)估;路徑分配
DOIDOI:10.11907/rjdk.161135
中圖分類號(hào):TP393文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1672-7800(2016)006-0179-05
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