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

【摘要】：將CDN和P2P進行融合構成的混合內容分發(fā)系統(tǒng)能夠充分結合兩種技術的優(yōu)勢,提高系統(tǒng)的可擴展能力和可靠服務能力。本文針對CDN-P2P系統(tǒng)中底層P2P分發(fā)網絡及其構造協(xié)議、CDN與P2P的融合以及CDN-P2P中的內容搜索算法三個方面進行了研究： (1)提出了一種基于興趣簇的混合式P2P網絡的拓撲構造協(xié)議,它結合了基于超級節(jié)點的混合式P2P網絡的特點,同時考慮了用戶節(jié)點對不同類型內容的偏好程度,該構造協(xié)議利用節(jié)點擁有的各不相同的負載能力值,將所有的普通節(jié)點在滿足興趣相似度足夠高的前提下,盡可能的聚集到負載能力值較強的超級節(jié)點周圍,從而使得最終得到的拓撲中超級節(jié)點盡量的少,以減少網絡中節(jié)點間消息交換帶來的流量。 (2)將基于興趣簇的混合式P2P網絡與CDN網絡進行融合,提出了基于興趣簇的CDN-P2P混合內容分發(fā)系統(tǒng)的模型。為了能充分利用基于興趣簇的混合式P2P網絡較高的可擴展性以及自組織能力,同時保留CDN網絡的較高的服務質量和穩(wěn)定性,通過CDN網絡中的邊緣服務器對P2P網絡中的興趣簇進行管理來完成二者的融合,并根據融合而成的系統(tǒng)的拓撲結構特點提出了CDN層、P2P層的雙層內容分發(fā)策略,最終相對于傳統(tǒng)的CDN-P2P網絡,降低了CDN網絡的負載和管理壓力,提高了系統(tǒng)的魯棒性,同時減少了內容分發(fā)的平均通信代價。 (3)基于興趣簇的CDN-P2P系統(tǒng)中的內容搜索算法,在前兩個研究點的基礎上,設計并實現了在基于興趣簇的CDN-P2P混合內容分發(fā)系統(tǒng)中的內容搜索算法,充分利用基于興趣簇的拓撲優(yōu)勢,將分布式的內容搜索與中心索引式的搜索相結合,減少了搜索命中需要的跳數,降低了搜索消息轉發(fā)帶來的網絡流量。
[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.
【學位授予單位】：北京郵電大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TP393.02

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相關期刊論文 前1條

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本文編號：1920219