基于ZigBee技术的智能家居系统设计

针对传统智能家居通用性较差、维护过程较为复杂的问题。提出了一种基于ZigBee技术的无线智能家居控制与实现方案,该系统方案利用已普及的ARM9处理器为数据处理中枢,利用ZigBee协议进行星型拓扑搭建无线网关,对数据进行采集、分析、交换、控制,并对部分网关通路故障进行拓展实验。与传统智能家居系统相比,该系统操作直观、维护简单,增强了智能家居控制系统的功能拓展性,实现了无线网络在无人环境下的高效智能化管理。     

美国空军短波全球通信系统技术分析

短波全球通信系统HFGCS,是高度自动化短波通信系统,为美国空军全球作战飞机部署和战略任务提供通信链路。这里首先介绍了HFGCS基本情况,然后分析了IP路由、短波台站控制信令和通信数据IP承载、短波无线IP协议、短波端到端保密互通等HFGCS具有特点的技术,最后给出了对中国短波通信网络发展的启示,建议加强短波台站收发信台资源统一调度、短波通信无线IP协议、短波通信信息分发、短波端到端保密通信等技术应用研究,各个层次都使用IP技术体制,保持短波通信网发展的可持续性。     

Pervasive, secure access to a hierarchical sensor-based healthcare monitoring architecture in wireless heterogeneous networks

This study presents a healthcare monitoring architecture coupled with wearable sensor systems and an environmental sensor network for monitoring elderly or chronic patients in their residence. The wearable sensor system, built into a fabric belt, consists of various medical sensors that collect a timely set of physiological health indicators transmitted via low energy wireless communication to mobile computing devices. Three application scenarios are implemented using the proposed network architecture. The group-based data collection and data transmission using the ad hoc mode promote outpatient healthcare services for only one medical staff member assigned to a set of patients. Adaptive security issues for data transmission are performed based on different wireless capabilities. This study also presents a monitoring application prototype for capturing sensor data from wireless sensor nodes. The implemented schemes were verified as performing efficiently and rapidly in the proposed network architecture.     

Wireless wearable network and wireless body-centric network for future wearable computer

The wireless wearable network and wireless body-centric network can assistant to the user anywhere at anytime communicating with wireless components seamlessly. In this paper, the wireless wearable network and wireless body-centric network have been discussed, and the frequency band and human body effect has been estimated. The bluetooth and UWB technology can be used to construct the narrow band and the broad band wireless wearable network and wireless body-centric network separately. Further, the narrow band wireless wearable network and wireless body-centric network based on bluetooth technology has been constructed by integrated planar inverted-F antenna and the communication channel character has been studied by measurement. The results can provide the possibility of producing a prototype radio system that can be integrated with the wearable computers by suitable wireless technologies developed and applied to facilitate a reliable and continuous connectivity between the system units.     

Infrastructure for Intelligent Automation Services in the Smart Grid

The electricity grid is undergoing a radical transformation from a production-driven to a demand-driven energy delivery platform known as the smart grid. The integration of a large amount of renewable and distributed energy resources, together with new patterns of electricity production, accentuates the need for research in information and communication technologies to control bi-directional energy flows. The European FP7 project: “Energy Demand Aware Open Services for Smart Grid Intelligent Automation” is contributing to this research by providing an intelligent infrastructure for service deployment for the smart grid. The project defines a system architecture that provides interoperability between wireless sensors in home area networks connected over the Internet to a service provider function deployed in a cloud infrastructure. A key component in this infrastructure is the Home Energy Controlling Hub that, on the one hand, provides a platform for monitoring and aggregation of electricity consumption data from devices and appliances and, on the other hand, is the link between the deployed intelligent automation services and the home. To ensure openness and simplicity, the proposed infrastructure is based on the representational state transfer style architecture. This is adopted by implementing the emerging ZigBee IP and Smart Energy Profile 2.0 standards that to a wide extend conform with the Internet Protocol suite and state-of-the art web services development.     

Intelligent network: a key platform for PCS interworking andinteroperability

The Tl and TIA standards committees in the United States have worked jointly on the development of the first phase of personal communication services (PCS) standards, which were approved in December 1995. PCS systems based on these standards are currently under development. As these systems are deployed, the variety of wireless systems will grow, making interworking and interoperability a key challenge. This article provides an overview of PCS standards and explores how the different types of wireless systems (PCS and cellular) will utilize the capabilities of the intelligent network to provide seamless roaming     

基于Zigbee技术的智能家居系统的研究

新型短距离无线通信技术ZigBee 具有超低功率、低速率等优点, 很适合家庭网络的组建.本文以ZigBee 为基础,搭建嵌入式ARM处理器及嵌入式Linux相结合的应用环境,研究了智能家居系统,重点阐述了该系统的结构和技术上的可行性.     

Internet-based distributed measurement and control applications

The NIST DMC (distributed measurement-and-control) demonstration project that has been described spans all levels of the DMC system. This multilevel data communication capability is a viable one as a result of standardized networks, protocols, and transducer interfaces. Common Internet-based software technology was used to provide the ease of data migration between the various communication pathways. Standard and de facto software languages such as C and Java were used with off-the-shelf development tools to implement the embedded network node applications and the web-based application, respectively. Internet-based TCP/IP protocols and Ethernet technology were used to design the networking infrastructure. The distributed measurement and control concept with networking sensors and actuators should work quite well with advanced system design, particularly where sensor-based monitoring and control applications are important. Taking this approach in system design can reduce the total life-cycle cost of the system by use of modular sensor system design and commercially available smart transducers with standardized interfaces, and easy maintenance and upgrade via simple plug-and-play sensor and actuator components. In addition, using standardized components and interfaces will certainly reduce interoperability problems     

Challenges of eWALL Wireless Interoperability

Due to development of different technologies there has been significant improvement in quality of life. As a result of that, average person’s lifetime duration has been increased. That triggers the problem of independent living of senior citizens. One of the main concerns of the world today is how to enable senior citizens to live independently. As a response to that, systems like eWALL are being developed. eWALL for Active Long Living is a FP7 funded project and it aims to develop system which will enable elderly people to live independently. These systems consist of a large number of sensors which make wireless sensor network. In this paper, different wireless technologies that can be used for communication in systems that are designed to support independent living of elderly people, have been described. The most important focus is at wireless personal area network technologies, like ZigBee, Bluetooth, Bluetooth Low Energy and wireless local area network technologies (e.g., Wi-Fi). There are many obstacles in designing wireless sensor network and most of them concern energy efficiency and interoperability of different technologies that are being used for communication. The main challenge in the current technology world is tremendous increase of use of various wireless devices and technologies, which can cause relatively high interference, so that the wireless devices can stop working. Using cognitive radio in solving the interoperability problem of different wireless technologies in wireless sensor networks has become interesting research topic. In this paper, research on interoperability of different wireless technologies is presented. Using Spectrum Engineering Advanced Monte Carlo Analysis Tool wireless sensors network in home environment was modelled. Interference based on devices layout and activity was investigated. Also, possible improvements that can be made with cognitive radio are investigated and obtained results are given in this paper.     

家庭Wi-Fi mesh组网技术

Wi-Fi mesh是一种适用于大面积或复杂户型的Wi-Fi自组网解决方案，为用户提供全覆盖、自切换、易安装的优质无线网络。Wi-Fi mesh具备自组网、自管理、自修复和自平衡等诸多优点，但现有Wi-Fi mesh产品实现方案存在标准不统一、实现复杂、终端能力要求高、无法互通的问题。首先讨论了现有家庭网络中多热点AP协同工作的实现情况，接着对当前Wi-Fi mesh主流技术进行了分析，重点探讨了家庭Wi-Fi mesh的技术方案和对比。进而面向家庭应用场景，为运营商提出了一种模块化、易实现、终端能力需求低且互通性好的Wi-Fi mesh技术实现方案。     

基于CC1101的车间无线通信系统设计

针对无线通信技术在车间通信方面的不断发展,提出了一种车间无线数据交换系统并对其动静态性能做出研究,为其能够在车辆碰撞预警中应用做好前期的理论和试验研究。该系统是以单片机STC12C5a60S2为微处理器,基于无线收发芯片CC1101的通信模块系统。对其工作原理和工作方式进行了分析,给出了其软硬件设计,阐述了通信模块的接口实现过程,并在硬件测试中验证了所设计的系统在静态及低速动态环境中性能良好。     

基于Basic—RF的家居环境监测预警系统设计

针对实际应用需求,结合Basic-RF无线通信技术、网络通信技术和GSM通信技术设计了一种基于Basic—RF的家居环境监测预警系统。系统由信息处理子系统和无线传感器网络子系统两部分组成,无线传感器网络子系统利用CC2530的Basic．RF双向无线通信协议结合应用层算法构建,信息处理子系统以STM32单片机为核心,利用ENC28J60网络模块以及SIM900A短信模块实现数据的远程传输。用户可通过上网设备方便地监测家居环境数据。当环境异常时会及时收到报警短信。实验结果表明,该系统具有稳定性高、实用性强、灵活性好的优点,对家居环境监测和预警具有广泛的应用前景。     

A type of healthcare system based on intelligent wireless sensor networks

A healthcare system based on wireless sensor networks (WSNs) is proposed to improve the quality of medical care in hospital or even at home. Structures of the wearable healthcare node, wireless multimedia node as well as the gateway in this system are described in detail. Moreover, a type of localization method for patients and an energy-efficient transmission strategy are put forward as well. Experimental results show that this system performs well on data transmission and information processing.     

种植大棚信息无线数据通信的研究

本文介绍了基于RF短距离无线通信和GPRS通信的无线数据通信系统的硬件和软件实现方案,该系统功能完善,数据传输可靠,能准确无误的传输指夸或数据,经在种植大棚中的实际应用证明,系统运行良好.     

种植大棚信息无线数据通信的研究

本文介绍了基于RF短距离无线通信和GPRS通信的无线数据通信系统的硬件和软件实现方案,该系统功能完善,数据传输可靠,能准确无误的传输指令或数据,经在种植大棚中的实际应用证明,系统运行良好。     

基于EPA通信的压力变送器开发

EPA是我国工业自动化领域第一个拥有自主知识产权并被国际电工委员会（IEC）认可的国际标准。本文主要阐述了EPA压力变送器的系统设计和EPA通信卡的开发,提出了结构采用通用的压力变送器与标准的EPA通信卡组合的形式,内部采用双CPU来实现整个现场数据和EPA数据的处理。所开发的EPA压力变送器不仅全部达到了压力检测的相关技术指标,还通过了EPA协议一致性、互操作性和实时性通信性能测试,且接入标准EPA网络系统中,各项监控数据均达到现场应用要求。     

Preface to the Special Topic on Devices and Circuits for Wearable and IoT Systems

The concept of Internet of Things (IoT) was first proposed by MIT Prof.Kevin Ash-ton in 1999.The implementation of IoT was mainly through RFID in its early time.With advanced technology and manufacture,diverse implementation forms ofIoT are becoming possible.Wearable devices,as an essential branch of IoT,will have broad application prospects in health monitoring and intelligent healthcare.     

基于Linux的网络管理系统研究与实现

本文首先给出SNMP协议的原理，接着设计了基于Linux的网络管理系统的信息通信模型，然后给出了SNMP网管系统中的核心部分：MIB编译器、MIB调入系统、SNMP消息封装、收发的设计与实现。     

MOBITEX and mobile data systems

Standards play a vital role in bringing an industry to widespread commercial use. Without standardization, interoperability of comparable systems and services is impossible, and economies of scale are never reached for manufacturing and investment. Historically, the standards are established either by a dominant player in a particular industry, e.g., IBM/Microsoft's development of DOS, or by coordination among multiple, non-dominant vendors, as was the case with GSM (Global System for Mobile Communications) or UNIX. The present article delves into the existing and emerging standards in the mobile data industry, with Ericsson's MOBITEX system used as an example. It shows how wireline standards are being adapted to wireless, how this strategy compares to the development of new protocols and standards, and how the computer industry and its associated standards bodies are working to effectively hide the underlying wireless protocols     

Development and testing of an SNMP‐based integrated management system for heterogeneous power line communication networks

Power line communication (PLC) is an evolving technology which uses existing power lines for data transmission. Like any other communication network, PLC networks need to be managed to ensure efficient use of resources and secure operations. Currently, major PLC chip vendors are trying to provide network management solutions based on the Simple Network Management Protocol (SNMP) by developing their own management systems, but they cannot manage heterogeneous PLC networks comprised of PLC devices from various PLC chip vendors. In this paper, we provide our experience of developing and testing an integrated management system for a heterogeneous PLC network based on SNMP. We present our approach for integrated management by defining the common PLC management information base (MIB) and an integrated PLC proxy agent for providing interoperability to legacy PLC devices which do not support the common PLC MIB. We also present the development of an integrated PLC network management system and its test in heterogeneous PLC networks deployed in South Korea. The contribution of our work is to provide a guideline for developing and testing integrated NMSs for any heterogeneous networks including PLC networks. Copyright © 2009 John Wiley & Sons, Ltd.