本文選題：CDN-P2P + 超級節(jié)點(diǎn)�。� 參考：《北京郵電大學(xué)》2015年碩士論文

【摘要】：將CDN和P2P進(jìn)行融合構(gòu)成的混合內(nèi)容分發(fā)系統(tǒng)能夠充分結(jié)合兩種技術(shù)的優(yōu)勢,提高系統(tǒng)的可擴(kuò)展能力和可靠服務(wù)能力。本文針對CDN-P2P系統(tǒng)中底層P2P分發(fā)網(wǎng)絡(luò)及其構(gòu)造協(xié)議、CDN與P2P的融合以及CDN-P2P中的內(nèi)容搜索算法三個方面進(jìn)行了研究： (1)提出了一種基于興趣簇的混合式P2P網(wǎng)絡(luò)的拓?fù)錁?gòu)造協(xié)議,它結(jié)合了基于超級節(jié)點(diǎn)的混合式P2P網(wǎng)絡(luò)的特點(diǎn),同時考慮了用戶節(jié)點(diǎn)對不同類型內(nèi)容的偏好程度,該構(gòu)造協(xié)議利用節(jié)點(diǎn)擁有的各不相同的負(fù)載能力值,將所有的普通節(jié)點(diǎn)在滿足興趣相似度足夠高的前提下,盡可能的聚集到負(fù)載能力值較強(qiáng)的超級節(jié)點(diǎn)周圍,從而使得最終得到的拓?fù)渲谐壒?jié)點(diǎn)盡量的少,以減少網(wǎng)絡(luò)中節(jié)點(diǎn)間消息交換帶來的流量。 (2)將基于興趣簇的混合式P2P網(wǎng)絡(luò)與CDN網(wǎng)絡(luò)進(jìn)行融合,提出了基于興趣簇的CDN-P2P混合內(nèi)容分發(fā)系統(tǒng)的模型。為了能充分利用基于興趣簇的混合式P2P網(wǎng)絡(luò)較高的可擴(kuò)展性以及自組織能力,同時保留CDN網(wǎng)絡(luò)的較高的服務(wù)質(zhì)量和穩(wěn)定性,通過CDN網(wǎng)絡(luò)中的邊緣服務(wù)器對P2P網(wǎng)絡(luò)中的興趣簇進(jìn)行管理來完成二者的融合,并根據(jù)融合而成的系統(tǒng)的拓?fù)浣Y(jié)構(gòu)特點(diǎn)提出了CDN層、P2P層的雙層內(nèi)容分發(fā)策略,最終相對于傳統(tǒng)的CDN-P2P網(wǎng)絡(luò),降低了CDN網(wǎng)絡(luò)的負(fù)載和管理壓力,提高了系統(tǒng)的魯棒性,同時減少了內(nèi)容分發(fā)的平均通信代價。 (3)基于興趣簇的CDN-P2P系統(tǒng)中的內(nèi)容搜索算法,在前兩個研究點(diǎn)的基礎(chǔ)上,設(shè)計并實(shí)現(xiàn)了在基于興趣簇的CDN-P2P混合內(nèi)容分發(fā)系統(tǒng)中的內(nèi)容搜索算法,充分利用基于興趣簇的拓?fù)鋬?yōu)勢,將分布式的內(nèi)容搜索與中心索引式的搜索相結(jié)合,減少了搜索命中需要的跳數(shù),降低了搜索消息轉(zhuǎn)發(fā)帶來的網(wǎng)絡(luò)流量。
[Abstract]:The hybrid content distribution system composed of CDN and P2P can combine the advantages of the two technologies and improve the scalability and reliable service ability of the system. In this paper, the integration of P2P distribution network and P2P in CDN-P2P system and the content search algorithm in CDN-P2P are studied. (1) A hybrid P2P network topology construction protocol based on interest cluster is proposed. It combines the characteristics of hybrid P2P network based on super nodes and takes into account the preference of user nodes for different types of content. Using the different load capacity values of each node, the construction protocol gathers all the ordinary nodes around the super nodes with strong load capacity under the premise of satisfying the interest similarity sufficiently. In order to reduce the traffic caused by message exchange between nodes in the network, there are as few super nodes in the resulting topology as possible. The hybrid P2P network based on interest cluster is fused with CDN network, and a model of CDN-P2P hybrid content distribution system based on interest cluster is proposed. In order to make full use of the high scalability and self-organization ability of the hybrid P2P network based on interest cluster, the high quality of service and stability of the CDN network can be preserved at the same time. The interest clusters in P2P networks are managed by edge servers in CDN networks to complete the integration of the two, and according to the topology characteristics of the integrated system, the two-layer content distribution strategy of CDN layer is proposed. Finally, compared with the traditional CDN-P2P network, it reduces the load and management pressure of the CDN network, improves the robustness of the system, and reduces the average communication cost of content distribution. On the basis of the first two research points, we design and implement the content search algorithm in the CDN-P2P hybrid content distribution system based on interest cluster, and make full use of the topology advantage of interest cluster. By combining the distributed content search with the central index search, the hops needed for the search hits are reduced, and the network traffic caused by the search message forwarding is reduced.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TP393.02

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本文編號：1920219