本文選題：流媒體點(diǎn)播系統(tǒng)　切入點(diǎn)：P2P　出處：《華南理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著互聯(lián)網(wǎng)技術(shù)的發(fā)展和網(wǎng)絡(luò)基礎(chǔ)建設(shè)不斷加強(qiáng)，流媒體應(yīng)用發(fā)展迅速，并且仍在迅速增長(zhǎng)。一方面P2P技術(shù)在流媒體發(fā)展過(guò)程中發(fā)揮著越來(lái)越重要的作用；另一方面隨著近些年服務(wù)器性價(jià)比的提高，服務(wù)器在流媒體系統(tǒng)中的作用也有一定的加強(qiáng)。 本文的研究對(duì)象是流媒體點(diǎn)播系統(tǒng)中的緩存策略，包括服務(wù)器集群中的副本放置策略和客戶端P2P網(wǎng)絡(luò)中的緩存管理策略。緩存策略對(duì)于流媒體點(diǎn)播系統(tǒng)有著重要的影響。集群中優(yōu)化的副本放置，可以充分利用集群的存儲(chǔ)空間和網(wǎng)絡(luò)帶寬，，減少服務(wù)拒絕率，提高系統(tǒng)的服務(wù)能力。P2P網(wǎng)絡(luò)中的客戶端通過(guò)將播放過(guò)的資源緩存在本地，不僅能夠降低服務(wù)器負(fù)載，還能夠提高資源傳輸效率，減小主干網(wǎng)絡(luò)的壓力。 本文首先分類研究了服務(wù)器集群的副本放置策略，包括靜態(tài)副本放置策略（MMPacking算法）和動(dòng)態(tài)副本放置策略（基于閾值的副本放置策略），分析了它們的優(yōu)缺點(diǎn)。之后研究了傳統(tǒng)P2P流媒體緩存管理機(jī)制，進(jìn)行分類說(shuō)明。 服務(wù)器集群中的副本和P2P網(wǎng)絡(luò)中客戶端的緩存一樣，也是一種緩存，基于這種考慮，我們提出綜合考慮集群副本和P2P流媒體緩存的一個(gè)方案。對(duì)于不同熱度的流媒體資源采用不同的緩存方法。另外基于半結(jié)構(gòu)化的P2P網(wǎng)絡(luò)架構(gòu)，針對(duì)服務(wù)器集群和P2P流媒體網(wǎng)絡(luò)采用基于閾值的副本放置策略和基于段緩存價(jià)值的副本管理策略。之后在實(shí)驗(yàn)室項(xiàng)目的基礎(chǔ)上給出了它們的實(shí)現(xiàn)。 最后，通過(guò)仿真實(shí)驗(yàn)對(duì)方案的有效性進(jìn)行了驗(yàn)證。
[Abstract]:With the development of Internet technology and the strengthening of network infrastructure, streaming media applications are developing rapidly and are still growing rapidly. On the one hand, P2P technology plays an increasingly important role in the development of streaming media. On the other hand, with the improvement of the performance and price ratio of servers in recent years, the role of servers in streaming media system has been strengthened. The research object of this paper is the cache strategy in streaming media on demand system. It includes replica placement policy in server cluster and cache management policy in client P2P network. Cache policy has an important impact on streaming media on demand system. It can make full use of the storage space and network bandwidth of the cluster, reduce the rejection rate of service, improve the service capability of the system. The client in the P2P network can not only reduce the server load by caching the played resources locally, but also reduce the server load. It can also improve the efficiency of resource transmission and reduce the pressure of backbone network. First of all, this paper classifies and studies the replica placement strategy of the server cluster. It includes static replica placement strategy (MMPacking algorithm) and dynamic replica placement strategy (replica placement strategy based on threshold), and analyzes their advantages and disadvantages. Then, the traditional P2P streaming media cache management mechanism is studied and classified. A copy in a server cluster is a cache, just like a client cache in a P2P network. We propose a scheme that considers cluster replica and P2P streaming media cache synthetically. Different caching methods are adopted for streaming media resources with different heat. In addition, based on semi-structured P2P network architecture, For the server cluster and P2P streaming media network, we adopt the replica placement strategy based on threshold and the replica management strategy based on the value of segment cache, and then give their implementation on the basis of the lab project. Finally, the effectiveness of the scheme is verified by simulation experiments.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN948.64

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 蔡青松,李子木,胡建平;Internet上的流媒體特性及用戶訪問(wèn)行為研究[J];北京航空航天大學(xué)學(xué)報(bào);2005年01期

2 孫名松;姚亮;張瀟依;;基于經(jīng)濟(jì)模型的分布式流媒體緩存策略[J];計(jì)算機(jī)工程;2009年17期

3 黃曉濤;鄭濤;;P2P流媒體點(diǎn)播的緩存機(jī)制研究[J];計(jì)算機(jī)工程與科學(xué);2008年03期

4 李e

本文編號(hào)：1615325