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SIP协议是当前VoIP和IM等多媒体协议的呼叫建立协议。P2P技术提供了分布式的网络架构中通信节点之间得对等通信能力,P2P网络架构经历了集中目录式网络架构、纯P2P网络架构、混合式P2P网络架构和结构化P2P网络架构。通过引入P2P技术,SIP网络的能力可以得到增强。P2PSIP网络主要有两个重要的操作:对P2P节点的操作和用户层面的操作。 相似文献
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He Jie Huang Yongfeng Li Xing 《电子科学学刊(英文版)》2007,24(6):845-853
The letter proposes a three-layer manageable media distribution network system archi- tecture called MSPnet, which is based on Session Initiation Protocol[1] and Peer to Peer (SIP P2P) technology. MSPnet performs application-level structured DHT routing and resource location among domains and unstructured ones in domain. Except for media distribution, it can be used to support a variety of P2P applications, including video broadcasting, video on demand, VoIP, etc. MSPnet is composed of three layers, namely, the signal control layer, the management layer, and the media transportation layer. The MSPnet prototype consists of the SIP server, the management server, the media server, and the node User Agent (UA). Results from a prototype experiment in a large-scale Internet environment show that MSPnet is feasible, scalable and manageable. 相似文献
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Hui-Kai Su Jian-Ting Pan Kim-Joan Chen Marek R. Ogiela Hsing-Chung Chen 《电子科技学刊:英文版》2019,17(3):242-251
A peer-to-peer (P2P) multimedia conferencing service is operating that users share their resources to each other on the Internet. It can solve the problem in the centralized conferencing architecture, such as the centralized loading, single point error, and expensive infrastructure. However, P2P networks have the problem that a peer has a difference between the physical location and logical location in the overlay network. In the viewpoint of P2P networks, the nearest conference resource may be far away geographically. The P2P-session initiation protocol (P2P-SIP) multimedia conference is to construct an application-based logical multicast network efficiently according to physical network information. Thus, this paper proposes a real-time streaming relay mechanism for P2P conferences on hierarchical overlay networks. The real-time streaming relay mechanism can improve the transportation efficiency of conferencing stream exchange well based on the application-layer multicast (ALM) structure and the hierarchical overlay networks. 相似文献
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文中提出了一种在P2P架构上的基于SIP协议的多媒体邮件网络,他可以克服IP网络上的服务器瓶颈问题和H.323协议的繁琐及低效率问题.同时介绍了本网络采用该P2P架构和SIP协议的优势所在.在此基础上,还介绍了本网络如何对多媒体信息流的获取、存储管理以及播放.最后,对各个功能模块进行了总体介绍. 相似文献
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P2P网络传输是当今互联网中最主要的应用之一,它的流行使得互联网上资源的共享变得十分便捷,同时也使得传播控制和信息监管变得十分困难。这里以经典的病毒传播模型为基础,提出了一个复杂、快速及大范围网络的传播模型,实现了一个针对BT和eMule下载的传播监测系统,该系统可以对某个资源的网络传播进行扩散趋势预测和节点定位。该传播模型配合监测系统能够对P2P网络资源传播进行有效的监控和预测分析,使管理者能对网络进行更加有力的监管。 相似文献
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P2P流量识别与管理技术 总被引:31,自引:0,他引:31
P2P流量在推动Internet宽带化的同时也带来了资源过度占用和网络安全等问题.本文调查和研究了P2P流量识别和策略控制的最新技术及相关设备,总结出P2P流量综合控制模型,并指出进一步的研究方向. 相似文献
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P2P技术在IPTV中的应用 总被引:5,自引:0,他引:5
P2P是一种新兴的网络模型。它引导网络应用的核心从中央服务器向网络边缘的终端设备扩散。与传统的C/S模式相比,它在网络资源利用率、消除服务器瓶颈等方面具有明显的优势。首先介绍了P2P的概惫,然后分析了P2P技术和C/S模式的区别。最后介绍了P2P技术在网络电视中的应用及其存在的问题,并指明了未来的研究方向。 相似文献
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对P2P与SIP结合的初步探讨 总被引:1,自引:0,他引:1
P2P和SIP是如今互联网、IT和通信界最热门的话题,P2P带来了思想和计算模式的革命,而SIP有望在通信和呼叫信令层面一统天下.本文就P2P和SIP系统架构和两者之间可能的结合点进行了分析,并提出两者可能的结合方案以及亟待研究的问题. 相似文献
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P2PSIP系统结合了P2P技术和SIP协议的优势,是当今网络技术领域的热门应用之一。本文首先介绍了P2PSIP系统的基本原理,基于现有的P2PSIP系统的体系结构,提出了P2PSIP系统测试主要内容,并分析和探讨P2P重叠层和SIP应用层的测试重点。 相似文献
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目前P2P网络中的资源搜索算法以泛洪法为核心,产生的巨大网络流量加重了网络负载,只适合小型网络。蚁群优化算法具有较好的鲁棒性、并行性等优点,已有不少学者将其应用于P2P资源搜索。本文在分析蚁群算法应用于P2P网络中资源搜索面临的问题的基础上,给出一个适合蚁群算法的新型的P2P文件共享构架,以解决P2P路由的不一致性等问题。在P2P网络中应用能见度会带来3个缺点:容易导致局部极小解、容易导致流量集中、实际网络中的实现有较大难度,由此本文提出了去能见度蚁群算法。构建了开放式的网络仿真拓扑结构,通过一系列的实验结果验证了去能见度蚁群算法的全局能力更强。 相似文献
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Network-aware P2P file sharing over the wireless mobile networks 总被引:1,自引:0,他引:1
Chung-Ming Huang Tz-Heng Hsu Ming-Fa Hsu 《Selected Areas in Communications, IEEE Journal on》2007,25(1):204-210
With the coming wireless mobile networks era and the popular use of P2P applications, how to improve the resource retrieval and discovery for P2P file sharing applications in wireless mobile networks becomes a critical issue. In this paper, we propose a novel network-aware P2P file architecture and related control schemes that can provide continuous resource retrieval and discovery for mobile users over the wireless network environment. The proposed architecture divides a P2P file sharing network into multiple network-aware clusters, in which peers are assigned to a network-aware cluster using a network prefix division. Accordingly, there are two designs for supporting mobile peers to retrieve files in wireless mobile networks. First, a novel file discovery control scheme named mobility-aware file discovery control (MAFDC) scheme is devised to obtain fresh status of shared peers and find the new resource providing peers in wireless mobile networks. Second, a resource provider selection algorithm is devised to enable a mobile peer to select new resource providing peers for continuous file retrieval 相似文献
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资源搜索和节点管理一直是非结构化Peer-to-Peer (P2P)网络研究的热点.很多不同的搜索策略和分组方案在面临高转换率,freeriding和whitewashing等特殊安全问题时将无法达到原有的性能和效率.文章提出了一个开放的具有抵抗上述特殊问题的群体管理体系结构.主要工作包括:(1)一个新的群体管理体协结构及对应的协议和双层树结构:(2)基于缓存的捷径技术和关键拓扑群体分组技术来优化搜索策略.性能评估表明提出的体系结构具有更好的搜索性能、开放性和对抗特殊问题的能力. 相似文献
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Peer-to-peer (P2P) computing technology has been widely used on the Internet to exchange data. However, it occupies much network bandwidth, and thus greatly influences traditional business on the Interact. Besides, problems about free-riders and 'tragedy of the commons' in the P2P environment estrange from it P2P users who constantly contribute to the network with quality resources. This article proposes a new P2P network traffic control mechanism based on global evaluation values. It aims to help individual users to avoid peak traffic time as much as possible, ease network congestion and protect traditional business on the Interact, as well as differentiating priority grades of peers according to their contributions and stimulating them to share their valuable resources actively. This article first analyzes the current state of network traffic, and then elaborates on P2P network traffic control policies and proposes the peer's priority level differentiation mechanism based on global evaluation values. Finally,after the testing results and analysis of the proposed P2P network traffic control mechanism are discussed, conclusions are drawn. 相似文献
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目前主要P2P业务的运营模式主要有:Skype模式、广告模式、商贩模式、网格计算模式、电子商务模式。这些业务运营模式可以降低应用提供门槛,实现系统自激励机制,实现资费分担,增加用户"黏"度。未来,P2P的一个可能的方向是平台化,即形成一个基于P2P的资源交换平台,这个平台对用户进行抽象,对资源进行统一建模,并以一致的方式进行资源标识、注册、索引和搜索。用户之间的交互协议,可以采用标准的会话初始化协议(SIP)方式进行,实现标准化。交互接口可以按照可扩展标记语言(XML)的方式进行定义。不同的应用将基于这个平台构建不同的资源交换模型,并生成不同的应用逻辑。 相似文献
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P2P业务流量识别与系统部署方案研究 总被引:1,自引:0,他引:1
在研究总结P2P业务流量识别最新技术的基础上,从部署原则、系统架构方案、网络架构方案等方面着重阐述了运营商部署P2P业务的具体方案,为进一步研究P2P流量控制策略和实际开展P2P业务提供了借鉴和技术支持。 相似文献