如何预防和处理ARP地址欺骗和攻击

描述了基于ARP地址欺骗和攻击的特点和原理,阐述了如何预防ARP地址欺骗和攻击的方法以及如何处理已经受到感染ARP病毒的计算机,论文最后介绍了采用网关MAC地址绑定的方法,保证发送的文件每次都能经过正确的网关.实验结果表明论文介绍的方法能有效拦截ARP攻击.     

工业无线遥控系统在天车上的应用

介绍一种无线遥控天车控制的硬件系统,整个系统电气线路接线简单、操作方便、系统稳定,在恶劣的环境中具有较高的应用价值。     

基于VXI总线的寄存器基器件设计

分析了VXI总线器件的几种工作方式，重点介绍了寄存器基器件的设计和应用，给出了器件的基本框架图。     

Assessment of antenna characteristic effects on pedestrian and cyclists travel-time estimation based on Bluetooth and WiFi MAC addresses

Monitoring pedestrian and cyclists movement is an important area of research in transport, crowd safety, urban design and human behaviour assessment areas. Media Access Control (MAC) address data has been recently used as potential information for extracting features from people’s movement. MAC addresses are unique identifiers of WiFi and Bluetooth wireless technologies in smart electronics devices such as mobile phones, laptops and tablets. The unique number of each WiFi and Bluetooth MAC address can be captured and stored by MAC address scanners. MAC addresses data in fact allows for unannounced, non-participatory, and tracking of people. The use of MAC data for tracking people has been focused recently for applying in mass events, shopping centres, airports, train stations, etc. In terms of travel time estimation, setting up a scanner with a big value of antenna’s gain is usually recommended for highways and main roads to track vehicle’s movements, whereas big gains can have some drawbacks in case of pedestrian and cyclists. Pedestrian and cyclists mainly move in built distinctions and city pathways where there is significant noises from other fixed WiFi and Bluetooth. Big antenna’s gains will cover wide areas that results in scanning more samples from pedestrians and cyclists’ MAC device. However, anomalies (such fixed devices) may be captured that increase the complexity and processing time of data analysis. On the other hand, small gain antennas will have lesser anomalies in the data but at the cost of lower overall sample size of pedestrian and cyclist’s data. This paper studies the effect of antenna characteristics on MAC address data in terms of travel-time estimation for pedestrians and cyclists. The results of the empirical case study compare the effects of small and big antenna gains in order to suggest optimal set up for increasing the accuracy of pedestrians and cyclists’ travel-time estimation.     

IP ADDRESS AUTOCONFIGURATION FOR WIRELESS AD HOC NETWORKS

IntroductionWireless ad hoc networks are gaining increas-ing popularity in recent years because of their easeof deployment. No wired base station or infras-tructure is supported,and each hostcommunicatesone anothervia packetradios. In ad hoc networks,routing protocols are challenged with establishingand maintaining multihop routes in the face of mo-bility,bandwidth limitation and power con-straints. In ad hoc networks,each node( host)acts as a router since routes are mostly multihop.Nodes in …     

短距离低功率无线通信接入系统

讨论短距离低功率无线通信接入系统中蓝牙,UWB和Wi-Fi,并比较它们容量,网络拓扑,安全,QoS支持和功率消耗等.     

地铁广播系统的集成应用

结合广播系统在地铁综合监控系统中的集成应用案例,着重对地铁广播系统进行研究。列举1条地铁线路作为典型的工程实例,包括14个车站、1座车辆段、1座控制中心,在各车站、车辆段、控制中心设有广播系统,主要用于对乘客进行公告信息广播和发生灾害时兼作防灾广播。介绍中心、车站、车辆段各级对广播功能的需求,在此基础上分析整条线路的广播系统的结构和典型配置。阐述各级广播的基本原理,对广播系统的各级控制流程和典型音频流程进行剖析。     

地铁列车联挂后无法广播的原因分析及改进

分析了深圳地铁罗宝线一期工程电动客车与续建工程电动客车的乘客信息系统在进行联挂后,无法实现列车间司机室对客室人工广播功能的技术原因。结合实际运营操作要求,针对性地提出了技术改进方案,成功实现了该项功能。     

基于MicroFIP的WorldFIP从节点研发

随着WorldFIP列车控制网络的引进,为了消化吸收国外机车技术,在分析了WorldFIP网络的基础上,采用MicroFIP设计了WorldFIP从节点,运用CPLD对PC/104高位地址进行译码,并实现了与ALSTOM公司的同类产品完全互换,系统间完全兼容。     

网络中的VLAN技术

VLAN有效控制了整个网络中广播信息的流量，简化网络设备的变更。合理划分VLAN会使网络变得简单，介绍3种常用划分方法。结合VLAN在以太网中的实际应用，阐述不同VLAN间互相通信的数据流程。