基于節(jié)點(diǎn)介數(shù)和替換率的內(nèi)容中心網(wǎng)絡(luò)網(wǎng)內(nèi)緩存策略
發(fā)布時(shí)間：2019-03-16 13:25
【摘要】：網(wǎng)內(nèi)緩存技術(shù)是內(nèi)容中心網(wǎng)絡(luò)(CCN)的關(guān)鍵技術(shù)之一,CCN采用傳統(tǒng)的ALWAYS緩存策略,會(huì)造成較大冗余。改進(jìn)的Betw方案僅考慮了節(jié)點(diǎn)介數(shù),容易造成高介數(shù)節(jié)點(diǎn)緩存更替頻繁,內(nèi)容可用性下降。為了解決這個(gè)問(wèn)題,該文提出一種綜合使用網(wǎng)絡(luò)節(jié)點(diǎn)介數(shù)和節(jié)點(diǎn)緩存內(nèi)容更替速率作為緩存決策度量的新型網(wǎng)內(nèi)緩存策略BetwRep,通過(guò)權(quán)衡節(jié)點(diǎn)位置重要性和緩存內(nèi)容時(shí)效性實(shí)現(xiàn)回傳內(nèi)容的最佳放置。最后,基于ndnSIM平臺(tái)進(jìn)行的網(wǎng)絡(luò)仿真表明,該文提出的BetwRep緩存策略取得了比Betw方案和ALWAYS方案更低的源端請(qǐng)求負(fù)載和更少的平均跳數(shù)。
[Abstract]:In-net caching is one of the key technologies of content-centric network (CCN). CCN adopts traditional ALWAYS caching strategy, which will result in a large amount of redundancy. The improved Betw scheme only considers the node intermediate number, which easily results in frequent cache replacement and low content availability. In order to solve this problem, this paper proposes a new in-net cache strategy, BetwRep, which combines the number of nodes and the rate of node cache content replacement as the measurement of cache decision. The optimal placement of backhaul content is achieved by balancing the importance of node location and the timeliness of cache content. Finally, the network simulation based on ndnSIM platform shows that the proposed BetwRep cache strategy achieves lower source-side request load and less average hops than the Betw and ALWAYS schemes.
【作者單位】： 北京郵電大學(xué)泛網(wǎng)無(wú)線通信教育部重點(diǎn)實(shí)驗(yàn)室;北京郵電大學(xué)北京市網(wǎng)絡(luò)體系構(gòu)建與融合重點(diǎn)實(shí)驗(yàn)室;南京(中國(guó))未來(lái)網(wǎng)絡(luò)產(chǎn)業(yè)創(chuàng)新中心;
【基金】：國(guó)家973計(jì)劃項(xiàng)目(2012CB315801,2011CB302901) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金(2013RC0113)資助課題
【分類號(hào)】：TP393.02
本文編號(hào)：2441453
[Abstract]:In-net caching is one of the key technologies of content-centric network (CCN). CCN adopts traditional ALWAYS caching strategy, which will result in a large amount of redundancy. The improved Betw scheme only considers the node intermediate number, which easily results in frequent cache replacement and low content availability. In order to solve this problem, this paper proposes a new in-net cache strategy, BetwRep, which combines the number of nodes and the rate of node cache content replacement as the measurement of cache decision. The optimal placement of backhaul content is achieved by balancing the importance of node location and the timeliness of cache content. Finally, the network simulation based on ndnSIM platform shows that the proposed BetwRep cache strategy achieves lower source-side request load and less average hops than the Betw and ALWAYS schemes.
【作者單位】： 北京郵電大學(xué)泛網(wǎng)無(wú)線通信教育部重點(diǎn)實(shí)驗(yàn)室;北京郵電大學(xué)北京市網(wǎng)絡(luò)體系構(gòu)建與融合重點(diǎn)實(shí)驗(yàn)室;南京(中國(guó))未來(lái)網(wǎng)絡(luò)產(chǎn)業(yè)創(chuàng)新中心;
【基金】：國(guó)家973計(jì)劃項(xiàng)目(2012CB315801,2011CB302901) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金(2013RC0113)資助課題
【分類號(hào)】：TP393.02
【共引文獻(xiàn)】
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