本文選題：CDN-P2P + 相似性�。� 參考：《北京郵電大學(xué)》2014年碩士論文

【摘要】：本文研究并分析了CDN和P2P技術(shù)的優(yōu)缺點(diǎn),并對(duì)CDN-P2P融合網(wǎng)絡(luò)的特點(diǎn)進(jìn)行了研究,針對(duì)其下載過程,從P2P網(wǎng)絡(luò)的節(jié)點(diǎn)組織結(jié)構(gòu),資源搜索策略以及CDN網(wǎng)絡(luò)中的副本放置策略等三個(gè)不同的層次分析、優(yōu)化CDN-P2P網(wǎng)絡(luò),以便更好地結(jié)合這兩種技術(shù)的優(yōu)勢(shì)提高文件分發(fā)下載的效率和服務(wù)質(zhì)量,提升用戶體驗(yàn)。主要有以下幾個(gè)關(guān)鍵點(diǎn)： 第一從用戶節(jié)點(diǎn)的組織結(jié)構(gòu)考慮,改進(jìn)了基于相似性的鄰居選擇算法。將節(jié)點(diǎn)對(duì)資源類型的偏好相似性和節(jié)點(diǎn)對(duì)資源的評(píng)分相似性結(jié)合起來,形成節(jié)點(diǎn)整體的興趣相似性,將興趣相似性較高的節(jié)點(diǎn)組織在一個(gè)子網(wǎng)中,使得下載更有針對(duì)性。 第二從P2P網(wǎng)絡(luò)的資源定位角度出發(fā),提出了一種基于興趣差別的查詢算法,避免盲目轉(zhuǎn)發(fā)查詢消息,使得查詢更有針對(duì)性,提高資源定位的效率,減少下載過程中因查詢產(chǎn)生的額外流量。 第三從CDN網(wǎng)絡(luò)的資源放置策略出發(fā),邊緣服務(wù)器通過分析節(jié)點(diǎn)在搜索、下載過程中的數(shù)據(jù)以及資源的類型信息,定期運(yùn)行內(nèi)容預(yù)存任務(wù),向中心服務(wù)器反饋近期熱門類型及其需求數(shù)量。中心服務(wù)器通過組織數(shù)據(jù)庫(kù)文件查詢將相應(yīng)的資源列表返回給邊緣服務(wù)器,滿足其預(yù)存需要,以便快速響應(yīng)節(jié)點(diǎn)的文件請(qǐng)求,提高節(jié)點(diǎn)用戶發(fā)現(xiàn)所需求內(nèi)容以及共享內(nèi)容的效率,進(jìn)而提高下載效率。
[Abstract]:In this paper, the advantages and disadvantages of CDN and P2P technology are analyzed, and the characteristics of CDN-P2P fusion network are studied. According to the download process, the node organization structure of P2P network is introduced. In order to improve the efficiency and service quality of file distribution and download and improve the user experience, the resource search strategy and the replica placement strategy in CDN network are analyzed in order to optimize the CDN-P2P network and improve the efficiency and service quality of file distribution and download. There are the following key points: First, considering the organization structure of the user node, the neighbor selection algorithm based on similarity is improved. The similarity of node preference to resource type and the similarity of node score on resource are combined to form the interest similarity of nodes as a whole, and the nodes with high interest similarity are organized into a subnet to make the download more targeted. Second, from the point of view of resource location in P2P network, a query algorithm based on interest difference is proposed, which avoids blindly forwarding query messages, makes the query more targeted and improves the efficiency of resource location. Reduce the additional traffic generated by the query during the download process. Thirdly, starting from the resource placement strategy of CDN network, the edge server runs the task of content pre-storage periodically by analyzing the data in the search and download process and the type information of the resource. Feedback to the central server the number of recent hot types and their requirements. The central server returns the corresponding list of resources to the edge server by organizing database file queries to meet its pre-storage needs in order to respond quickly to file requests from nodes. Improve the efficiency of node users to discover the required content and share content, and then improve the efficiency of downloading.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP393.02

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本文編號(hào)：1888359