面向移动设备的XMPP协议的研究与应用

发布时间：2018-05-02 15:01

本文选题：即时通信 + 移动设备　；参考：《中南大学》2014年硕士论文

【摘要】：摘要：移动互联网的高速发展使得人们的网络生活开始从桌面终端向移动终端迁移,即时通信作为目前的互联网的核心应用之一,在移动设备上被广泛使用。即时通信协议XMPP协议基于XML语言,不仅能够支持异构系统之间的互联互通,且具有很强的可扩展性而被认为是未来即时通信领域的主流协议。但XMPP协议本身是一个高耗能的协议,将其应用于移动设备上时,会给电池的续航能力带来较大的挑战。论文针对XMPP协议在移动设备上的场景,提出一种出席消息代理模型,通过代理服务器缓存出席更新消息,并根据缓存策略调整消息到达设备的时间序列,避免设备长时间处于耗能较高的状态下工作,从而节省电池电量。由于出席消息代理会给出席消息带来一定的延迟,延迟时间越长节省电量越多,但长时间的延迟将导致较差的用户体验。论文通过排队论建立了数学模型,推导出延迟和省电量之间的关系,并通过实验进行验证。实验表明,无论移动设备上登录单个还是多个XMPP客户端,出席消息代理都能够有效节省设备电量,特别在3G网络下客户端节省电量甚至达到56.5%。其次,结合XMPP协议架构的特点,本论文提出了一种基于XMPP协议的实时消息推送方案,并研发出移动医疗推送系统。该系统是由中南大学信息科学与工程学院与湘雅医院合作,能够为用户提供体检报告、门诊结果、住院费用等医疗信息的实时推送与历史记录查询。系统不仅能够节省用户时间,同时也能缓解医院的接待压力,具有一定的实用价值。图21幅,表14个,参考文献61篇。
[Abstract]:Absrtact: with the rapid development of mobile Internet, people's network life begins to migrate from desktop terminal to mobile terminal. As one of the core applications of Internet, instant messaging is widely used in mobile devices. Instant messaging protocol (XMPP) is based on XML, which not only supports the interconnection between heterogeneous systems, but also has strong scalability and is considered to be the mainstream protocol in the field of instant communication in the future. However, the XMPP protocol itself is a high energy consuming protocol. When it is applied to mobile devices, it will bring a great challenge to the battery's ability to live. Aiming at the scenario of XMPP protocol on mobile devices, this paper proposes a presence message broker model, which caches the participating update message through proxy server, and adjusts the time series of messages to the device according to the cache policy. Avoid the equipment working in the state of high energy consumption for a long time, thus saving battery power. The longer the delay time, the more energy saving, but the longer the delay will lead to poor user experience. In this paper, the mathematical model is established by queuing theory, and the relationship between delay and power saving is deduced and verified by experiments. The experimental results show that no matter the mobile devices log on to single or multiple XMPP clients, the presence of message agents can effectively save the power of the devices, especially in the 3G network, the client can save even 56.5. Secondly, considering the characteristics of XMPP protocol architecture, this paper proposes a real-time message push scheme based on XMPP protocol, and develops a mobile medical push system. The system, which is cooperated by the School of Information Science and Engineering of Central South University and Xiangya Hospital, can provide users with medical information such as medical examination report, outpatient results, hospitalization expenses and so on. The system can not only save user time, but also relieve the pressure of hospital reception. There are 21 figures, 14 tables and 61 references.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.04

【参考文献】