基于轮总线混合结构的应用层组播模型研究

发布时间：2018-06-03 23:00

本文选题：应用层组播 + 节点综合性能　；参考：《南京邮电大学》2016年硕士论文

【摘要】：随着信息技术的迅速发展,组播通信成为了互联网研究的一个重要课题。组播是一种比较理想的、用于实现群组通信的网络通信技术。由于IP组播对路由器的依赖性等固有缺陷使得该技术未被广泛推广,应用层组播技术ALM应运而生。ALM便于实现和推广以及能够针对特定应用优化等优势,已逐渐成为互联网中提供组播服务的主要方式。但是,国内外相关研究表明应用层组播仍存在不少待改进的地方。因此,如何构建合理的ALM模型以适应成为目前研究的重点之一。为了更好地利用网络资源,提高应用层组播模型的传输效率,本文提出了一种基于轮-总线混合结构的分层应用层组播模型HWB-ALM。模型通过构建独特的覆盖网结构将节点映射到不同的层次中并根据节点性能值进行动态地调整,建立了完善的节点管理和维护机制。并以此覆盖网为基础构建数据传输拓扑,为数据传输提供高效、可靠的服务。根据应用需求的特点系统采取不同的数据传输策略,对于实时性应用实现一种基于节点度约束的数据泛洪传输算法。通过Myns仿真结果表明,本模型具有较高的数据传输率和带宽利用率,有着较好的应用前景。
[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.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP393.03

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