传感器网络操作系统问题与进展

传感器网络集成了传感器、微机电系统和网络等技术,提供了一个全新的分布式信息搜集和处理平台。作为上层协议和应用程序的运行基础的操作系统,传统的嵌入式操作系统已难以适应传感器网络的要求。从操作系统的角度来分析传感器网络的特点,给出了传感器网络操作系统亟需解决的关键技术,综述了传感器网络操作系统的当前研究状况,并指出其发展趋势和方向。     

一种无线传感器网络节点操作系统设计

无线传感器网络节点操作系统是无线传感器网络的控制核心,与传统的嵌入式操作系统相比有着很大的不同。阐述了无线传感器网络的特点及其对操作系统的要求,介绍了操作系统SOS,并与当前最流行的操作系统之一TinyOS做了对比分析;并在本实验室设计的用于研究月球车等移动目标定位导航的无线传感器网络节点上设计了基于SOS内核的操作系统。     

嵌入式WSNs汽车防盗系统

无线传感器网络是由分布于一定的监控区域内,用于监测特定环境信息的无线传感器网络节点组成的.本文给出了嵌入式无线传感器汽车防盗系统的软硬件设计方案.在综合考虑节点性能、功耗、成本等基础上,采用当前流行的ARM系列微处理器AT91 SAM7S256,GPRS模块MC39i.加速度传感器ADXL202实现无线传感器网络节点的软硬件设计.     

嵌入式无线传感器网络的应用与研究

无线传感器网络是当前国际上备受关注的、由多学科高度交叉的新兴前沿研究热点领域,被认为是21世纪最重要的技术之一.本文采用当前流行的微处理器芯片AT91SAM7S256、射频芯片CC2420、GPRS模块MC39i、温度传感器TMP05和加速度传感器ADXL202实现无线传感器网络节点的硬件设计,并在软件设计方面进行深入的研究.最后给出一个应用实例一蓝牙技术在无线传感器网络中的应用.     

一种用于无线传感器网络的模块化设计方法

针对无线传感器网络应用多样化的特点,建立了基于ZigBee技术的无线传感器网络节点与网关节点的模块化软、硬件设计方案。该硬件方案具有模块化与集成度高的特点,软件方案基于嵌入式操作系统进行多种功能的模块化设计,具有良好扩展性以及可维护性。实现了一种基于单芯片平台的传感器节点与ARM平台的网关节点,讨论了当前与未来适用的各种嵌入式设计关键技术。     

无线传感器网络操作系统关键技术研究*

针对无线传感器网络的特点分析了无线传感器网络对操作系统的特殊需求,分析了无线传感器网络操作系统的特点.重点介绍了无线传感器网络操作系统开发过程中的几大关键技术:结构的层次化技术、框架技术、节能型通信模型技术、可裁减构件技术、普适计算模型技术.这些技术已用于西北工业大学的无线传感器网络的开发实践中,并取得了较理想的效果,对更好地开发无线传感器网络操作系统和开发应用软件有很高的参考价值.     

无线传感器网络应用系统最新进展综述

无线传感器网络是由大量小型、低成本的传感器节点组成的多跳无线自组织网络,主要用于采集和传播环境数据.近年来,无线传感器网络已经应用在环境监测、医学研究、军事和日常生活等多个领域.对无线传感器网络应用系统的最新进展进行综述,以应用系统的研究机构、目的、部署时间、路由方式、节点类型、数据采集频率等为出发点进行了详细介绍,并对各应用系统进行分析对比,进而总结了现阶段无线传感器网络应用系统存在的问题,最后展望了今后的发展方向.     

无线传感器网络操作系统TinyOS的研究

无线传感器网络（Wireless Sensor Network,简称WSN）综合了传感器技术、嵌入式计算技术、现代网络、无线通信技术及分布式信息处理技术。本文介绍了无线传感器网络及无线传感器网络操作系统的特点,分析了具有代表性的无线传感器网络操作系统TinyOS,最后指出TinyOS调度策略的不足,提出一点改进的意见。     

Agent在无线传感器网络中的应用研究

无线传感器网络包含了许多关键技术,例如路由技术、数据处理、动态编程等等.针对于无线传感器网络及其传感节点的特点,提出将Agent技术应用于传感器网络中,具体包括网络程序动态更新、分布式协同、异构操作系统和数据库操作等几个方面,目的是为了方便应用、提高效率、节省能耗、平衡通信流量和负载、最大化网络的生命周期.通过具体应用分析,总结了其优点并论证了其可行性.     

无线传感器网络操作系统现状分析

操作系统技术是无线传感器网络的支撑技术之一,无线传感器网络的独特性对操作系统提出新的需求,操作系统必须充分考虑无线传感器系统的独特性,高效地组织和管理硬件资源,满足不同传感器网络应用在功能和性能方面的特殊需求。本文研究了两大类无线传感器网络操作系统,事件驱动单线程系统（Event．driven system）和多线程系统（Multithread system）,并且进行了比较,为进一步优化系统架构的设计打下基础。     

Small universal simple spiking neural P systems with weights

Spiking neural P systems with weights（WSN P systems,for short） are a new variant of spiking neural P systems,where the rules of a neuron are enabled when the potential of that neuron equals a given value.It is known that WSN P systems are universal by simulating register machines. However,in these universal systems,no bound is considered on the number of neurons and rules. In this work,a restricted variant of WSN P systems is considered,called simple WSN P systems,where each neuron has only one rule. The complexity parameter,the number of neurons,to construct a universal simple WSN P system is investigated. It is proved that there is a universal simple WSN P system with 48 neurons for computing functions; as generator of sets of numbers,there is an almost simple（that is,each neuron has only one rule except that one neuron has two rules） and universal WSN P system with 45 neurons.     

Uncovering network traffic anomalies based on their sparse distributions

Characterizing network traffic with higher-dimensional features results in increased complexity of most detectors and classifiers for identifying traffic anomalies. Several key observations from existing studies confirm that network anomalies are typically distributed in a sparse way,with each anomaly essentially characterized by its lower-dimensional features. Based on this important finding,we exploit sparsity in designing a novel detection method for anomalies that ignores redundancies that are dynamically filtered from the feature sets and accurately classifies anomalies. Comparison of our method with three well known techniques shows a10% improvement in accuracy with an O（n） complexity of the classifier.     

无线传感器网络(WSN)安全综述

总结并分析了国外近年来无线传感器网络（WSN）在安全协议、算法、体系结构、运行系统等方面的研究,掌握了当今世界无线传感器网络安全发展的动态,找出主要的问题,探索解决的方案,可以为进一步开展研究拓宽思路。     

An open framework for translating portable applications into operating system‐specific wireless sensor networks applications

Wireless sensor networks (WSNs) are distributed systems integrated by tiny devices, called sensor nodes, with capabilities to monitor the environment and forward their measurements to a special node, the sink, where the results can be collected and further processed. The trend in WSN is moving towards heterogeneous networks that will contain different sensor nodes running different instances of custom operating systems. Given the growing demand of new hardware platforms and operating systems specifically designed for sensor nodes, the applications programming for sensor nodes is becoming a challenging process that needs to be alleviated. Currently, application programming for sensor nodes is a complex, ad hoc, and error‐prone process where the portability among different platforms has been sacrificed. In this paper, we propose an open framework aimed to achieve application portability in heterogeneous sensor networks. Our approach provides the programming abstractions needed to support the application development process for sensor nodes. We have implemented an open framework that provides a set of tools on top of the most popular WSN operating systems to translate portable applications to the native operating system in an automatic, simple, and transparent way for developers. We have also evaluated the applications thus generated in terms of productivity and overhead, by comparing their footprint to those originally developed in each specific operating system. The results show that the overhead is minimal—4% in the worst case—and in some cases, it was even possible to reduce the footprint by using code optimizations. Copyright © 2012 John Wiley & Sons, Ltd.     

Diagnostic Tools for Wireless Sensor Networks: A Comparative Survey

The availability of tools to diagnose Wireless Sensor Network (WSN) failures is a key success factor for this type of networks as already demonstrated by several long-running deployments. By nature, WSNs are resource-constrained, fragile, complex to analyse, and failure-prone. Naturally, with the growing number of installations, it is becoming fundamental to efficiently diagnose failures as soon as possible, in order to deal with the underlying causes. In accordance with this, from 2005 onwards, the offer of diagnostic tools has been increasing, as the other base technologies (e.g. networking, operating system, localisation, synchronisation) become reasonably stable. The purpose of this survey is to provide an overview of existing post-deployment WSN diagnostic tools, by briefly presenting their functionality, architecture and constraints, in order to enable a basic understating of each tool. The survey also includes a multi-dimensional comparative analysis of the various tools, based on a proposed classification scheme and evaluation criteria, as well as an identification of the main open research issues. Although the number of diagnostic tools is high and considerable work has been done in this area, we conclude that there are still several challenges concerning post-deployment WSN diagnostic tools, regarding scope, flexibility, generality, mobility and security. Moreover, there is a need for mature, native diagnostic-oriented functionality in WSN platforms and operating systems.     

TinyOS内核调度机制及改进策略

分析了具有代表性的无线传感器网络操作系统TinyOS的调度机制并指出其不足。在此基础上提出了改进方案并实现了基于优先级的调度策略。从模拟仿真及在实际系统GAINS节点中应用的结果可知，该改进方法能很好地改善无线传感器网络通信性能。     

Application of wireless sensor networks to aircraft control and health management systems

Use of fly-by-wire technology for aircraft flight controls have resulted in an improved performance and reliability along with achieving reduction in control system weight. Implementation of full authority digital engine control has also resulted in more intelligent, reliable, light-weight aircraft engine control systems. Greater reduction in weight can be achieved by replacing the wire harness with a wireless communication network. The first step towards fly-by-wireless control systems is likely to be the ...     

基于无线传感网络瓦斯传感器调校技术研究

设计基于无线传感网络技术的瓦斯传感器调校系统,采用JENIC5139模块架构无线瓦斯传感器节点,实现瓦斯检测数据的及时发送、瓦斯传感器的在线调校及参数动态设定;基于无线传感网络的瓦斯传感器节点克服目前瓦斯传感器稳定性差、调校费时费力的缺点,将传统7天升并调效一次传感器的周期延长到2个月,显著提高煤矿企业生产效率;井上控制中心通过无线网络不但可以随时了解瓦斯传感器的工作状态.还可实现瓦斯传感器的动态调零和非线性动态修正,显著改善煤矿企业安全生产水平.     

煤矿安全监测系统无线传感器网络网关设计

针对煤炭工业以太网络与井下ZigBee无线传感器网络异构互联的需要,提出了一种煤矿安全监测系统无线传感器网络网关设计方案;介绍了网关的软硬件实现要点,并在不额外移植新操作系统内核的情况下,对ZigBee协议栈Z-Stack的操作系统抽象层进行了相应扩展,以满足嵌入式网关系统任务实时性要求。测试结果表明,该网关实现了ZigBee无线传感网络和以太网的通信协议转换功能,保证了数据转发的实时性和可靠性。