共查询到18条相似文献,搜索用时 109 毫秒
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目前,无线Internet移动性管理主流方案之一是采用移动IP(MIP)以及初始会话协议(SIP).其中移动IP是无线Internet实现各种移动业务的关键技术,而SIP是提供和实现IP业务的重要协议.文章根据MIP与SIP的综合应用提出了一种MIP/SIP融合的移动性管理方案,它优化了注册过程,减少了移动节点的信令开销,并引入了平滑切换机制来减少切换过程中的丢包率,从而很大程度上提高了网络的性能. 相似文献
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几个无线技术论坛,比如3GPP2,已经决定采用SIP作为移动因特网会话管理的信令协议,很显然SIP将成为移动因特网协议结构中不可分割的一部分。详细描述了怎样使用SIP对终端和个人移动性的支持。移动IP虽然使得移动性对更高层是透明的,但是它也带来了三角路由和隧道管理等问题,而SIP在应用层对移动性进行管理,对于实时通信来说,这种方案更加有效。 相似文献
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移动网络随着位置的变化将会不断改变它的Internet接入点,相应地,网络的拓扑结构也会发生变化,这种问题被定义为网络的移动性NEMO(Network Mobility)。为了解决这个问题,IETF提出了NEMO基本协议。但是这个协议存在着一些不足,其中之一就是路由优化问题。本文着重分析了两种不同的NEMO网络路由优化方案——蝶型路由的优化方案和基于SIP的NENO路由优化方案,并对这两种方案进行了对比。结果表明:基于SIP的NEMO路由优化方案在应对不同情况时的表现较好。 相似文献
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本文介绍一种基于SIP协议的个人移动性的实现方案。文中简要介绍SIP的功能.组件响应等。并在此基础上分析了它对于个人移动性的实现机制。在文章的最后介绍该实现方案。 相似文献
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移动IP技术对于移动性的支持在网络层,需要对网络协议进行修改,而SIP协议在应用层提供了对移动性的支持,无需底层网络协议的改变.文中深入探讨了SIP协议在应用层支持个人移动性的工作原理,设计了两个典型的个人移动性应用场景,进行了试验验证并对试验结果进行了分析讨论.试验充分证明了SIP协议在应用层对于个人移动性的良好支持,为解决底层移动协议对移动性支持所带来的种种问题以及移动IP缺失的环境提供了有益的补充. 相似文献
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基于多协议层联合优化的移动性管理技术 总被引:1,自引:0,他引:1
针对下一代网络的通用移动性,从多协议层联合优化的角度提出一种可以有效融合多业务的通用移动性管理方案。该方案以网络层移动性支持协议(Mobile IP)及其微移动管理协议为基础,并在此基础上融合会话初始协议(SIP),将网络层移动性管理与应用层移动性管理进行联合优化设计,同时考虑链路层的切换,减少功能性和信令数据信息的重复。 相似文献
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SIP是一种应用层控制信令协议,用于创建、修改和结束与一个或多个参与者的会话。它具有简单、扩展性好以及移动性好等优点。本文介绍了SIP协议的内容、特性并且给出了一个SIP服务器的设计与实现方案。 相似文献
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Session mobility is one of new critical issues in the ubiquitous mobile networking environment. Session mobility provides a user changing its ongoing multimedia session, e.g., Voice-over-Internet Protocol (VoIP), from the currently using device to another by adapting user’s demand. In session Initial Protocol (SIP)-based multimedia services supporting session mobility, SIP serves as a signaling control protocol to negotiate session control, whereas media is transmitted using Real-time Transport Protocol (RTP). For securing multimedia sessions, Multimedia Internet Keying (MIKEY) is embedded in SIP signaling to negotiate security parameters for Secure RTP (SRTP), whereas SRTP is used to protect media stream. Since session mobility allows an ongoing multimedia session to be transferred from one device to another, a new security problem is raised, i.e., sensitive parameters may remain in the previous device when the ongoing multimedia session has been transferred to the current device. Unfortunately, current MIKEY cannot bear the aforementioned security problem in session mobility. Therefore, we propose Multimedia Internet Rekeying (MIRKEY) for session mobility in the ubiquitous mobile networking environment. Although MIKEY can be executed again to carry out the rekeying of the session key and Crypto Session bundle (CSB) update, the sensitive parameters still remain in previous devices. MIRKEY contains a SBK to bind the participated user and multimedia session. Besides, SBK can persist in rekeying based on the key chain whenever a multimedia session is transferred to other devices. As a result, SBK is operative only in the specific device. As a result, MIRKEY can solve the newly raised security problem in session mobility. Furthermore, we verify MIRKEY using Burrows–Abadi–Needham (BAN) logic and realize it in the implemented ubiquitous multimedia service platform (UMSP). 相似文献
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随着互联网的发展,IPv6最终会成为未来互联网网络层的核心协议。而SIP作为下一代多媒体通信中的重要技术也受到普遍的欢迎和认可。描述了IPv6网络环境下使用SIP的优势,并且提出了在IPv4与IPv6共存的混合网络环境下采用NAT-PT结合ALG进行SIP电话通信的解决方案。 相似文献
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《Computer Standards & Interfaces》2014,36(2):397-402
Recently, Voice over Internet Protocol (VoIP) has been one of the more popular applications in Internet technology. For VoIP and other IP applications, issues surrounding Session Initiation Protocol (SIP) have received significant attention. SIP is a widely used signaling protocol and is capable of operating on Internet Telephony, typically using Hyper Text Transport Protocol (HTTP) digest authentication protocol. Authentication is becoming increasingly crucial because it accesses the server when a user asks to use SIP services. In this paper, we concentrate on the security flaws in the current SIP authentication procedure. We propose a secure ECC-based authentication mechanism to conquer many forms of attacks in previous schemes. By a sophisticated analysis of the security of the ECC-based protocol, we show that it is suitable for applications with higher security requirements. 相似文献
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The convergence of Next Generation Networks and Internet-based rich applications are generating relevant industrial opportunities in the market of mobility-enabled services. Even if this trend is widely recognized, there are still a few industrial-level solutions that effectively support session mobility in a transparent way and with the capability of openly integrating with existing and legacy applications. In this paper we propose a SIP-based hybrid architecture for Web session mobility that offers content sharing and session handoff between Web browsers. In addition, its technical originality includes integrating a SIP stack into a Web browser, thus offering the advantage of extending a Web browser to act as a SIP client. Lastly, a rich set of control services that prevent abuse of content sharing and session handoff are introduced into the proposed system. The implemented solution uses SIP in a standard way to migrate Web sessions between Web browsers; it is made up of a SIP integrated Web client and a converged (SIP and HTTP) Application Server that can be easily used to enable session mobility in any kind of Web-based application. In addition, the implemented system has recently evolved to a framework for developing different kinds of converged services over the Internet, analogously to what is possible with Google Wave and the existing telephony APIs. Finally, the paper reports the evaluation of the proposed framework and of the employed technologies, together with directions of future work, in terms of both extension to other application domains and exploration of research areas/models that can benefit form the adoption of SIP and Web-related solutions. 相似文献
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SIP(Session Initiatioan Protocol)协议是由IETF工作组于1997年7月提出的,是应用层的控制协议,能建立、调整和终止多媒体的呼叫和会话。SIP协议是基于文本方式的,即以明文方式传输。SIP消息包括请求消息、应答消息。SIP协议侧重于将IP电话作为因特网上的一个应用,并且也采用RTP作为媒体传输的协议。本文在SIP通信过程中,采用面向连接的TCP来传输SIP的交互信令,采用面向无连接的UDP协议进行实时音频流传输。本设计是在Linux操作系统下,用套接字(socket)来实现的。设计实现了SIP协议的整个通信过程。最后,提出了进一步开发的设想。 相似文献
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Tzu-Chi Huang Ce-Kuen Shieh Bo-Yang Lai Yu-Ben Miao 《Computer Standards & Interfaces》2009,31(2):406-419
Session Initiation Protocol (SIP) is the most favorable candidate as the mobility management protocol in mobile computing. However, both the application and its developer suffer from inconveniences in utilizing SIP due to lack of a universal interface of SIP. In this paper, the Network Application Programming Interface over Session Initiation Protocol (NAPISIP) is proposed to facilitate using SIP in applications. The NAPISIP has the advantages of supporting concurrent mobility, avoiding application modification, saving application developers from burdens of learning to use SIP, and freeing operating systems from requirements of supporting sophisticated services or Application Programming Interfaces (APIs) to get communication handoff information. The NAPISIP is implemented on Windows 2000 and given experiments. In the experiments with legacy computers, the NAPISIP not only shows a promising performance but also has no drawbacks in Mobile IP when mobile hosts roam through networks. 相似文献
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针对传统网络技术不适合移动通信且移动IP和SIP有单失效点固有缺陷的问题,文章提出了一种基于对等网络的IP网络分层移动性管理方法.该方法首先将问题结构定义为本地接入域网络和Internet全局网络两层模型,使用本地和全局两级覆盖网来处理该模型中接入网内的水平切换和跨接入网的垂直切换,并使用HIP协议来解耦静态主机标识和实际的网络位置.文章通过仿真实验指明将对等网络与移动性管理相结合的方法可以有效改善网络的可扩展性,并且信令开销和时延增加较少,此外HIP协议还为应用提供了透明的移动性和安全性的支持. 相似文献