DVB同密(Simulcrypt)的实现

介绍了DVB同密的原理和他的体系结构，分析了同密的优势，并给出了面向连接消息的一般结构，比较了ECM产生和发送的两种方式。     

基于ZeroMQ&JSON的分布式测控系统消息通信架构设计

为了提高异构环境下的分布式测控系统内部网络的通信效率,采用消息中间件技术和一种轻量级的数据交换格式,设计了一种有效的分布式测控网络消息通信架构。该架构用在智能楼宇监控实验中,提高了数据的传输效率。该架构解决了异构系统集成的困难以及其数据交换格式的选择问题,经过实践的检验,该框架切实可行,可以胜任不断变化的环境和任务要求,具有广泛的适用性和良好的应用性。     

Low-latency neighbor discovery algorithm based on multi-beacon message in mobile low-duty-cycle sensor network

Neighbor discovery enables nodes in the networks to discover each other through simple information interaction,which was suitable for the new mobile low duty cycle sensor network (MLDC-WSN).However,because the nodes in MLDC-WSN can move randomly and sleep,the network topology was changed frequently,which results in that some nodes need a lot of energy and time to find their neighbors.How to realize fast neighbor discovery for all nodes in the network was a difficult problem in current research.To solve this problem,a new low-latency neighbor discovery algorithm based on multi-beacon messages was proposed.In this algorithm,the nodes were discovered by sending a short beacon message through their neighbor nodes,and by adjusting the time and frequency of beacon message sent,a lower neighbor discovery delay was obtained.Eventually,through quantitative analysis and simulation experiments,it is found that compared with existing algorithms,this algorithm can find all neighbor nodes in MLDC-WSN with less energy consumption,lower latency and greater probability.     

Mobile Commerce: Framework,Applications and Networking Support

Advances in e-commerce have resulted in significant progress towards strategies, requirements, and development of e-commerce applications. However, nearly all e-commerce applications envisioned and developed so far assume fixed or stationary users with wired infrastructure. We envision many new e-commerce applications that will be possible and significantly benefit from emerging wireless and mobile networks. To allow designers, developers, and researchers to strategize and create mobile commerce applications, we propose a four-level integrated framework for mobile commerce. Since there are potentially an unlimited number of mobile commerce applications, we attempt to identify several important classes of applications such as mobile financial applications, mobile inventory management, proactive service management, product location and search, and wireless re-engineering. We discuss how to successfully define, architect, and implement the necessary hardware/software infrastructure in support of mobile commerce. Also, to make mobile commerce applications a reality, we address networking requirements, discuss support from wireless carriers, and present some open research problems.     

一种实时系统消息类数据存储方法

针对实时系统采用的FAT文件系统存在的写入速度慢和重复写入同一位置等问题,提出一种实时系统消息类数据存储方法。在分析存储系统特点的基础上,从文件结构、文件初始化、文件打开、消息写入和消息查询5个方面建立消息类数据存储方法。结果表明,该方法既能有效保存数据,又能保证系统实时性。     

基于Widget的终端能力开放技术研究

终端能力开放是运营商在移动互联网飞速发展态势下,为提升自身竞争能力、构建全业务能力开放体系的一个重要方面。本文从终端能力的范围界定出发,分析和比较了现有的终端能力开放技术,并就Widget技术实现终端能力开放的技术架构和关键技术进行了研究。最后通过应用案例阐述了Widget的技术价值。     

一种应用于移动医疗的体征参数管理软件的设计

随着通信技术的发展,移动医疗在生活中扮演着越发重要的角色。在体域网及移动健康医疗的基础上,实现一种典型的个人健康监护系统,采用Android平台作为系统协调器,设计开发一种软件可以对传感器采集的体征参数进行管理。通过编程测试证明能够实时将用户的体征参数传输进入An-droid手机并发送至远端服务器,并可保证参数在移动监护终端和远端监护设备间实时、准确地传输,这对体域网的发展有着重要的参考价值。     

Message redundancy removal of multi-copy routing in delay tolerant MANET

This article puts forward a new scheme to control message redundancy efficiently in delay tolerant mobile Ad-hoc networks(MANET).The class of networks generally lacks end-to-end connectivity.In order to improve the efficiency that messages are delivered successfully,multiple message copies routing protocols are usually used,but the network load is increased due to a large number of message redundancies.In the study,by using counter method,every node adds an encounter counter based on epidemic routing scheme...     

嵌入式实时操作系统μC/OS-Ⅱ串口通信的设计与实现

为解决实时操作系统μC/OS-Ⅱ串口通信设计中信号量、消息邮箱使用方法的问题,提出了一种以STM32V评估板为硬件平台和μC/OS-Ⅱ的串口通信程序设计方案.该方案采用Codex-M3架构的ARM处理器STM32F103VB作为主控制芯片,ST3232作为串口通信电平转换器.软件设计部分描述了信号量、消息邮箱的应用场合...     

基于Web中间件的运维管理系统的性能优化方法研究与实践

从运维管理系统的实际情况出发,分析基于中间件的Web体系结构的系统技术特点,对该类型的运维管理系统实际运行环境(主机系统、网络、数据库、中间件、应用结构)出现的性能故障进行全面分析,找出影响性能的原因,给出调整参数的理论方法。通过系统运行过程的不断优化,得出合理的参数值,以减少和消除运维管理系统性能导致的用户感知差的影响。