无线移动传感器网络自适应体系结构的设计

随着无线网络技术的日益成熟及其对小型、微型移动设备的支持,无线移动传感器网络已经逐渐成为一个研究的热点。主要讨论了为无线移动传感器网络设计的一个自适应的体系结构。在该体系结构中,使用了一个区域和核心路由节点相结合的多层结构的方法来增加无线移动网络的信息传输能力、可扩充性和可靠性,并降低网络的能耗,这样就可以适应无线移动网络的高度动态性和移动性。     

无线移动传感器网络自适应体系结构的设计

随着无线网络技术的日益成熟及其对小型、微型移动设备的支持,无线移动传感器网络已经逐渐成为一个研究的热点.主要讨论了为无线移动传感器网络设计的一个自适应的体系结构.在该体系结构中,使用了一个区域和核心路由节点相结合的多层结构的方法来增加无线移动网络的信息传输能力、可扩充性和可靠性,并降低网络的能耗,这样就可以适应无线移动网络的高度动态性和移动性.     

非自主性移动无线传感器网络研究

无线传感器网络是目前比较流行的一种应用于各种监测环境的网络,其应用中遇到的一个难点是如何监测移动物体,例如泥石流区域或火山灰区域。于是诞生了一种非自主移动无线传感器网络,它布署在移动体内,随着移动体的移动而移动,在移动过程中监测环境数据。文章介绍了非自主移动无线传感器网络的概念、主要应用特点和大致工作原理。文章给出了一种支持非自主移动无线传感器网络的移动模型,该模型可以用于网络的路由查询、数据传输和网络的重构。     

无线传感器网络中移动目标跟踪算法研究

由于单个传感器节点的通信、处理和感知能力有限,所以传感器节点必须协同工作才能够完成任务。本文介绍了无线传感器网络的研究现状,阐述了目前成形的无线传感器网络协议与体系结构,阐述了针对面向目标跟踪的无线传感器网络涉及到的一些关键技术,并对现有的一些无线传感器网络中移动目标协同跟踪算法以及未来的发展方向进行了论述。     

城市移动无线传感器网络协同定位算法

随着无线传感器网络研究和应用的发展,城市规模的无线传感器网络开始出现,然而,其大规模、低成本、移动性和节点稀疏性等特性都给定位带来了困难.基于城市移动无线传感器网络的一种典型应用,研究了不依赖全球定位系统的无线传感器网络的定位问题,在曼哈顿环概率移动模型的基础上设计定位算法,并从理论和仿真两方面分析了该算法的收敛性和稳定性.     

无线传感器网络在应急通信系统中的应用

无线传感器网络是一个全新的研究领域，它综合了传感器技术、嵌入式计算技术、分布式信息处理技术和无线通信技术，应用前景十分广泛，已经成为目前的一个研究热点。无线传感器具有高可靠性、高抗毁性、随需而设、即设即用等特点，尤其适合用来完成应急系统中对无法部署固定线路的突发公共安全事件的监测任务。本文首先对无线传感器网络的体系结构进行了介绍，然后探讨了无线传感器网络需要解决的关键问题，最后设计了面向应急的无线传感器网络信息服务系统，实现了应急系统与无线传感器网络的结合。     

无线传感器网络体系结构研究

对无线传感器网络的体系结构进行了深入研究,从无线传感器网络的物理体系结构、软件体系结构、通信体系结构三个层面进行了分析,分析结果对于无线传感器网络的设计具有参考价值。     

引入移动节点的无线传感器网络

文章围绕引入移动节点可以节省无线传感器网络的能量消耗这一主题,对引入了移动节点的无线传感器网络的数据收集方式进行了一个全面合理的分类,并且结合相关文献对每类数据收集方式展开深入讨论,系统全面地论述了该主题的研究现状、存在的问题以及面临的挑战。     

一种利用移动无线传感器网络特性的定位算法

在研究移动无线传感器网络特性的基础上,借鉴蒙特卡洛算法思想,提出一种利用移动无线传感器网络特性进行定位的算法(EFL).EFL算法把移动无线传感器网络的移动特性和低秩特性作为节点定位的约束条件以提高节点定位的精度.仿真结果表明,采用EFI算法,节点的定位精度有较大提高.     

无线传感器网络在医疗中的应用

首先简介无线传感器网络的体系结构以及无线传感器网络在医疗中的应用情况,接着对无线传感器网络医疗监护系统的体系结构以及监护节点的设计进行阐述,最后,阐述无线传感器网络应用到医疗监护时存在的挑战。     

Design and implementation of a wireless sensor network architecture using smart mobile devices

Wireless sensor networks improve the quality of human daily life like ubiquitous city and healthcare services as well as the fundamental monitoring such as environment pollution, tunnel monitoring, earthquake diagnostic, and so on. To increase usability and feasibility of collected sensor data, a wireless sensor network should be required to apply a variety of mobile devices to give the information at anytime and anywhere to users. Thus, we present multi-sensor centric smart sensor network architecture using general mobile devices in order to provide more efficient and valuable sensor network application and services. The proposed system architecture is based on IEEE 802.15.4-2006 standard with smart mobile devices. We also show some scenarios with on-demand request and real time event driven data to show the feasibility of the proposed architecture using five kinds of sensors such as magnetic, photodiode, microphone, motion and vibration. Based on the experiment results, we show that the proposed system has the potential as smart mobile device-based wireless sensor network architecture.     

Data security in unattended wireless sensor networks with mobile sinks

Unattended wireless sensor networks operating in hostile environments face the risk of compromise. Given the unattended nature, sensors must safeguard their sensed data of high value temporarily. However, saving data inside a network creates security problems due to the lack of tamper‐resistance of sensors and the unattended nature of the network. In some occasions, a network controller may periodically dispatch mobile sinks to collect data. If a mobile sink is given too many privileges, it will become very attractive for attack. Thus, the privilege of mobile sinks should be restricted. Additionally, secret keys should be used to achieve data confidentiality, integrity, and authentication between communicating parties. To address these security issues, we present mAKPS, an asymmetric key predistribution scheme with mobile sinks, to facilitate the key distribution and privilege restriction of mobile sinks, and schemes for sensors to protect their collected data in unattended wireless sensor networks. Copyright © 2011 John Wiley & Sons, Ltd.     

无线传感器网络的体系结构

在对无线传感器应用特征进行分析的基础上,总结了无线传感器体系结构设计的要素,讨论了无线传感器网络的二维体系结构和组网方式.通过与传统Ad hoc网络的对比,归纳了无线传感器网络在各层各面设计的特点.文章认为虽然传统的传感器的应用方向主要在军事领域,但在民用领域也存在着广阔的前景.     

Piecewise Network Awareness Service for Wireless/Mobile Pervasive Computing

This paper presents a piecewise framework for network awareness service (NAS) for wireless/mobile pervasive computing. We investigate how piecewise consideration of wired and wireless elements of the framework architecture benefits service advertisement and discovery and network-awareness techniques. We also discuss scalability of the NAS framework with respect to platform computing capabilities. The framework is suitable for a wide range of computing devices, from powerful ones with multi-tasking operating systems (OS) to small ones with lightweight OS. Case studies applying the NAS framework to sensor monitoring in home networks and data streaming in pervasive multimedia computing are presented. The analytical results on the performance of the NAS framework in these case studies show that it has significant advantages over traditional network-awareness frameworks in terms of reducing wireless bandwidth consumption and saving battery energy of mobile devices.     

System lifetime optimization for heterogeneous sensor networks with a hub-spoke technology

As a specific area of sensor networks, wireless in-home sensor networks differ from general sensor networks in that the network has nodes with heterogeneous resources and dissimilar mobility attributes. For example, sensor with different radio coverage, energy capacity, and processing capabilities are deployed, and some of the sensors are mobile and others are fixed in position. The architecture and routing protocol for this type of heterogeneous sensor networks must be based on the resources and characteristics of their member nodes. In addition, the sole stress on energy efficiency for performance measurement is not sufficient. System lifetime is more important in this case. We propose a hub-spoke network topology that is adaptively formed according to the resources of its members. A protocol named resource oriented protocol (ROP) was developed to build the network topology. This protocol principally divides the network operation into two phases. In the topology formation phase, nodes report their available resource characteristics, based on which network architecture is optimally built. We stress that due to the existence of nodes with limitless resources, a top-down appointment process can build the architecture with minimum resource consumption of ordinary nodes. In the topology update phase, mobile sensors and isolated sensors are accepted into the network with an optimal balance of resources. To avoid overhead of periodic route updates, we use a reactive strategy to maintain route cache. Simulation results show that the hub-spoke topology built by ROP can achieve much longer system lifetime.     

基于移动代理WSN分布入侵检测研究

针对聚类无线传感器网络安全的问题,将移动代理技术与分布式入侵检测技术相结合,提出了一种基于移动代理的无线传感器网络分布式入侵检测方案,采用了多个代理模块进行分布式协作,运用一种基于聚类的分布式入侵检测算法,从节点上收集和处理数据,减少网络负载、促进效率平衡,能够满足WSNs的要求和限制。从而达到提高无线传感器网络的安全性、可靠性,降低入侵检测能量消耗的目的。     

iMobile EE – An Enterprise Mobile Service Platform

iMobile is an enterprise mobile service platform that allows resource-limited mobile devices to communicate with each other and to securely access corporate contents and services. The original iMobile architecture consists of devlets that provide protocol interfaces to different mobile devices and infolets that access and transcode information based on device profiles. iMobile Enterprise Edition (iMobile EE) is a redesign of the original iMobile architecture to address the security, scalability, and availability requirements of a large enterprise such as AT&T. iMobile EE incorporates gateways that interact with corporate authentication services, replicated iMobile servers with backend connections to corporate services, a reliable message queue that connects iMobile gateways and servers, and a comprehensive service profile database that governs operations of the mobile service platform. The iMobile EE architecture was also extended to provide personalized multimedia services, allowing mobile users to remotely control, record, and request video contents. iMobile EE aims to provide a scalable, secure, and modular software platform that makes enterprise services easily accessible to a growing list of mobile devices roaming among various wireless networks.     

一种移动多Sink无线传感器网络监测系统

军事防御、灾害监测与救援等危险/恶劣环境监测是无线传感器网络的典型应用。在此面向危险/恶劣环境监测需求,设计并构建移动多Sink无线传感器网络监测系统,实现环境信息感知、便携式移动指挥、事件定位、移动用户生理监护、多模态（语音、图像、文字等）交互等功能。实验测试结果表明,当网络中存在2个移动Sink节点时,网络平均延时小于100 ms,网络丢包率小于6%,可满足网络实时性要求不高的应用。     

浅析下一代移动通信网络的安全问题

随着移动通信网络的不断发展,无线接人技术、终端技术、网络技术和业务平台技术正向异构化、多样化和泛在化的趋势发展。下一代移动通信网络具有开放、灵活、可管理、移动的网络架构特点,因此其安全问题将比以往移动通信系统更加复杂。文章从下一代移动通信网络的组网结构人手,结合第二代及第三代移动通信系统存在的安全问题,分析下一代移动通信网络所面临的安全威胁,论述了其应具有的安全体系结构。