本文選題：應(yīng)用層組播 + 節(jié)點綜合性能��； 參考：《南京郵電大學(xué)》2016年碩士論文

【摘要】：隨著信息技術(shù)的迅速發(fā)展,組播通信成為了互聯(lián)網(wǎng)研究的一個重要課題。組播是一種比較理想的、用于實現(xiàn)群組通信的網(wǎng)絡(luò)通信技術(shù)。由于IP組播對路由器的依賴性等固有缺陷使得該技術(shù)未被廣泛推廣,應(yīng)用層組播技術(shù)ALM應(yīng)運而生。ALM便于實現(xiàn)和推廣以及能夠針對特定應(yīng)用優(yōu)化等優(yōu)勢,已逐漸成為互聯(lián)網(wǎng)中提供組播服務(wù)的主要方式。但是,國內(nèi)外相關(guān)研究表明應(yīng)用層組播仍存在不少待改進的地方。因此,如何構(gòu)建合理的ALM模型以適應(yīng)成為目前研究的重點之一。為了更好地利用網(wǎng)絡(luò)資源,提高應(yīng)用層組播模型的傳輸效率,本文提出了一種基于輪-總線混合結(jié)構(gòu)的分層應(yīng)用層組播模型HWB-ALM。模型通過構(gòu)建獨特的覆蓋網(wǎng)結(jié)構(gòu)將節(jié)點映射到不同的層次中并根據(jù)節(jié)點性能值進行動態(tài)地調(diào)整,建立了完善的節(jié)點管理和維護機制。并以此覆蓋網(wǎng)為基礎(chǔ)構(gòu)建數(shù)據(jù)傳輸拓撲,為數(shù)據(jù)傳輸提供高效、可靠的服務(wù)。根據(jù)應(yīng)用需求的特點系統(tǒng)采取不同的數(shù)據(jù)傳輸策略,對于實時性應(yīng)用實現(xiàn)一種基于節(jié)點度約束的數(shù)據(jù)泛洪傳輸算法。通過Myns仿真結(jié)果表明,本模型具有較高的數(shù)據(jù)傳輸率和帶寬利用率,有著較好的應(yīng)用前景。
[Abstract]:With the rapid development of information technology, multicast communication has become an important subject of Internet research. Multicast is an ideal network communication technology for group communication. Due to the inherent defects such as the dependence of IP multicast on routers, this technology has not been widely popularized, and the application-layer multicast technology (ALM) has the advantages of being easy to implement and popularize, and can be optimized for specific applications. It has gradually become the main way to provide multicast services in the Internet. However, research at home and abroad shows that there are still many areas for improvement in application-level multicast. Therefore, how to build a reasonable ALM model to adapt to the current research has become one of the key points. In order to make better use of network resources and improve the transmission efficiency of application-layer multicast model, a layered application-layer multicast model HWB-ALM based on wheel-bus hybrid architecture is proposed in this paper. By constructing a unique overlay network structure, the node is mapped to different levels and dynamically adjusted according to the node performance, and a perfect node management and maintenance mechanism is established. Based on the overlay network, the data transmission topology is constructed to provide efficient and reliable service for data transmission. According to the characteristics of application requirements, different data transmission strategies are adopted, and a data flooding algorithm based on node degree constraints is implemented for real-time applications. The simulation results of Myns show that this model has high data transmission rate and bandwidth utilization, and has a good application prospect.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TP393.03

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