物联网应用化智能网关技术

针对物联网应用需求的多样化、标准的不统一,提出了一种应用化的智能网关,增强了物联网网关的通用性与智能信息处理能力和应用服务能力。该网关基于OSGi中间件技术及其可动态加载特定物联网应用的框架,主要实现基于XML的多种传感器适配、智能信息处理模块或应用服务动态加载、上行流量传输优化与调度等相关功能。应用化的智能网关既能以传统网关的形式部署在大规模物联网应用中执行信息传输功能,也能独立部署在小规模物联网中执行智能信息处理和直接提供应用服务的功能。     

物联网网关的设计与实现

物联网网关把分散在不同地域、不同应用的感知网络的信息孤岛通过电信网络连接在一起,实现了异构网络间的信息交换和通信,是推动物联网规模应用,实现“可运营、可管理”的物联网的关键网元设备。分析了物联网网关的基本功能要求,提出了物联网网关的基本组成结构,同时也对我们开发的物联网网关样机进行了详细介绍。对规范物联网网关的研制和生产具有一定的参考和指导意义。     

基于.Net Micro Framework框架的物联网网关的研究

物联网网关在物联网时代扮演着非常重要的角色,本文对基于.Net Micro Framework平台的多协议及网络自适应的物联网网关系统进行了研究,对实现感知网络与传统通信网络连接和不同类型感知网络之间的协议转换的物联网网关功能进行了分析。     

物联网家庭网关中传感器网络节点的接入与信息处理

由于通信接口等因素的制约,物联网家庭网关中的无线传感器,在进行信息交换时存在数据格式等不匹配的问题。通过解析物联网以及对其架构的进一步分析讨论,给出了家庭网关所应用的传感器网络在接入模块时的一些必要基础。基于物联网家庭以及当前无线网络内传感器触电的特点,对串口接入传感器网络的可行性进行了讨论,并对其组织上的汇聚节点的设置规则进行分析,从而分析总结了传感器网络在家庭网关的接入与开发。     

基于Android平台的物联网网关方案设计

提出了一种基于Android平台的物联网网关方案。该网关通过蓝牙串口通信实现物联网中WSN（无线传感器网络）中心节点和Android网关的数据传输,在Android平台上实现WSN节点信息管理并通过Android的网络资源实现互联网接入,从而在WSN与互联网之间搭建一条透明的数据传输通道,完成对无线节点的数据进行远程和实时的监测控制。     

基于Android平台的物联网网关方案设计

提出了一种基于Android平台的物联网网关方案。该网关通过蓝牙串口通信实现物联网中WSN(无线传感器网络)中心节点和Android网关的数据传输,在Android平台上实现WSN节点信息管理并通过Android的网络资源实现互联网接入,从而在WSN与互联网之间搭建一条透明的数据传输通道,完成对无线节点的数据进行远程和实时的监测控制。     

浅析物联网网关技术研究

物联网作为新一代信息技术的重要组成部分,也是数据时代的重要发展阶段。物联网的概念最早是由美国自动识别实验室在1999年提出的,国际电信联盟曾在2005年的世界信息峰会上发布《ITU互联网报告2005:物联网》,才正式提出"物联网概念",其英文名称"Internet of things (IoT)"。而物联网网关正在成为将传统和下一代设备引入物联网(IoT)的关键要素,是把分散在不同地域、不同应用的感知网络的信息孤岛通过电信网络连接在一起,实现了异构网络间的信息交换和通信,实现"可运营、可管理"的物联网的关键网元设备。文章在研究物联网的发展趋势的基础上,首先对物联网技术进行了详细的表述,以及物联网网关的接入的主要技术和场景业务;最后在此基础上,从硬件和软件两个方面对于物联网网关设计进行分析,探讨如何实现不同感知设备的接入。     

基于6LoWPAN协议的物联网开发平台的设计

本文主要介绍了基于6LoWPAN的物联网开发平台的设计原理和关键技术。笔者所设计和实现的物联网开发平台从IPv6应用和与3G网络异构集成的角度,实现了端到端的全IP通信。本平台集成了一个嵌入式网关、多种常用传感器节点和6LoWPAN协议栈,具有很好的推广应用价值。     

基于嵌入式系统的物联网网关的设计

物联网网关作为连接传感网与传统通信网络的纽带,在即将到来的物联网时代将发挥重要的作用。文章设计了一种基于嵌入式系统的物联网网关,针对ZigBee无线传感网通信距离短、通信速率低的困扰,将ZigBee通信协议与以太网、GPRS等通信协议进行转换,实现对ZigBee节点的远程监控。系统以ARM9系列的S3C2440为主控芯片,采用模块化的设计思路,围绕主控制器搭建了相应的外围功能模块。软件方面,移植了Linux嵌入式操作系统,在网关节点上搭建web服务器,编写了相应的应用程序来实现物联网网关的功能。经测试,该网关功能稳定可靠,实现了无线传感网与传统通信网络之间的数据通信。     

一种粮仓温湿度控制系统的开发设计

本文描述了一种粮仓温湿度控制系统的开发设计。系统是一个基于ZigBee的传感器网络粮仓温湿度控制系统。以ZigBee无线传感器网络、常用智能仪表、智能网关、web管理软件为核心,综合体现了物联网的无线传感器网络、传感器和执行器开发运用、嵌入式技术、3G移动通信技术、Android移动开发、物联网系统设计等多方面的技术,为物联网实际应用提供了一个高效的综合控制系统平台。     

物联网网关系统设计

物联网网关在物联网中起着关键作用。本文旨在研究一种能应用于各种传感器网络及接入网络的异构网络的网关设备,能为中间件或者应用程序提供统一的数据格式,从而为应用屏蔽不同的传感器网络及接入网络,使得应用程序只需要关注应用环境的数据处理。     

面向物联网的嵌入式3G网关设计

随着信息技术的发展和物联网概念的兴起,感知化、互联化、物联化、智能化的大趋势正在发生。将传感技术、嵌入式技术、3G技术结合起来,设计了一种嵌入式3G网关,该网关以ARM9处理器LPC3250为核心,以嵌入式Linux为实时操作系统,对来自异构传感器网络的数据进行汇聚、处理、转发,实现了异构无线传感器网络融合、3G远距离转发和多种终端设备支持等,用以支持物联网的多种应用。     

对数字家庭网络新核心——家庭网关的分析

伴随互联网、物联网的发展,家庭设施呈数字化发展趋势,数字家庭概念的轮廓逐步清晰,包括家庭媒体设备间的数据分享、自动化家居的远程监控、对家庭网络门户及家庭内数据进行安全管理。随之衍生出对数字家庭网络新核心—家庭网关的需求。文章对家庭网关的形成、发展及未来可能性作了分析与预测,并结合国内外在家庭网关需求上的差异作了描述与分析。     

物联网中音频事件检测方法的研究

Recently, the Internet of Things (IoT) has attracted more and more attention. Multimedia sensor network plays an important role in the IoT, and audio event detection in the multimedia sensor networks is one of the most important applications for the Internet of Things. In practice, it is hard to get enough real-world samples to generate the classifiers for some special audio events (e.g., car-crashing in the smart traffic system). In this paper, we introduce a TrAdaBoost-based method to solve the above problem. By using the proposed approach, we can train a strong classifier by using only a tiny amount of real-world data and a large number of more easily colle cted samples (e.g., collected from TV programs), even when the real-world data is not sufficient to train a model alone. We deploy this approach in a smart traffic system to evaluate its performance, and the experiment evaluations demonstrate that our method can achieve satisfying results.     

Delay-Constrained Optimal Data Aggregation in Hierarchical Wireless Sensor Networks

A lot of realistic applications with wireless sensor networks adopt hierarchical architecture in which sensor nodes are grouped into clusters, with each cluster relying on a gateway node for local data aggregation and long-distance radio transmission. Compared to normal sensor nodes, the gateway nodes, also called application nodes (ANs), are equipped with relatively powerful transceivers and have more energy. Nevertheless, since an AN is the main gateway for sensor nodes within its clusters, its energy may be depleted more quickly than normal sensor nodes. As such, it is important to find methods to save energy for ANs. This paper presents a Delay-Constrained Optimal Data Aggregation (DeCODA) framework that considers the unique feature of traffic patterns and information processing at ANs for energy saving. Mathematical models and analytical results are provided, and simulation studies are performed to verify the effectiveness of the DeCODA framework.     

物联网体系结构、关键技术及面临问题

基于物联网的应用现状及发展前景,采用了对比分析和归纳总结的方法,介绍了物联网的概念与体系结构,简述了物联网的关键技术,包括:RFID技术、传感网技术、M2M技术、云计算和中间件技术等,指出了物联网面临的主要问题,得到了物联网必将为人类生活带来翻天覆地的变化,"智慧地球"的理想终将变成现实的结论。     

Industrial wireless sensor and actuator networks in industry 4.0: Exploring requirements,protocols, and challenges—A MAC survey

The vision to connect everyday physical objects to the Internet promises to create the Internet of Things (IoT), which is expected to integrate the diverse technologies such as sensors, actuators, radio frequency identification, communication technologies, and Internet protocols. Thus, IoT promises to transfer traditional industry to advance digital industry known as the Industry 4.0. At the core of the Industry 4.0 are the wireless sensor networks (WSNs) and wireless sensor and actuator networks (WSANs) that led to the development of industrial wireless sensor networks (IWSNs) and industrial wireless sensor and actuator networks (IWSANs). These networks play a central role of connecting machines, parts, products, and humans and create a diverse set of new applications to support intelligent and autonomous decision making. The IWSAN is a promising technology for numerous industrial applications because of their several potential benefits such as simple deployment, low cost, less complexity, and mobility support. However, despite such benefits, they impose several unique challenges at different layers of the protocol stack when deploying them for various monitoring and control applications in the Industry 4.0. In this article, we explore IWSAN, its applications, requirements, challenges, and solutions in the context of industrial control applications. Our main focus is on the medium access control (MAC) layer that can be exploited to satisfy such requirements. Our discussion presents extensive background study of the MAC schemes and it reviews the MAC protocols of the existing wireless standards and technologies. A number of application‐specific MAC protocols developed to support industrial applications, which are not part of these standards, are also elaborated. We rationalize to what extent the existing standards and protocols help in solving such requirements as laid down by the Industry 4.0. In the end, we emphasize on existing challenges and present important future directions.     

物联网发展情况研究

物联网是当今的热门话题,是IT技术发展的重要方向.在介绍物联网的定义、特点、关键技术以及各种标准的基础上,着重分析国内外主要电信运营商在物联网领域的发展情况,并探讨物联网的商业模式和我国物联网发展需应对的问题.     

WiSEGATE: Wireless Sensor Network Gateway framework for internet of things

With internet of things vision, computing systems get the ubiquity of real world. Wireless Sensor Network (WSN) technology plays a critical role for the construction of this paradigm. Hence, WSN technology should be adapted to support interoperability with the commodity internet entities. Since technological background of WSN and IP networks do not fit each other, this effort is not a straightforward process. In this paper, we introduce WiSEGATE which addresses end-to-end reliable interconnection problem between multiple internet entities and sensor nodes. WiSEGATE is a prototype of a new web server which supports three tier service scheme with a data acquisition mechanism of WSN to access the physical data in particular locations in the real world. In WiSEGATE, an interconnection gateway handles operations required for the interoperability. Since this gateway maintains reliable TCP/IP connections of the interconnected entities, the resource constraint sensor nodes on WSN do not require a TCP/IP stack for handling end-to-end connections. A lightweight service layer is implemented on a sensor node for operations required by the interconnection. The strength and novelty of the model lies in the fact that this lightweight service layer relieves extra memory usage for end-to-end connection management. For determining limits of the proposed model, firstly, we examined the steps for request/response mechanism and modeled the gateway as a queueing system. By doing this, we derive a definition of the request traffic. For proof of concept, we performed comprehensive tests in simulation and real testbed environments for WLAN connection. WiSEGATE can achieve reasonable response times up to 80 simultaneous connections from remote entities to WSN when WLAN PER is less than 0.2.     

Mobile sensor network programming system

Sensors carried by moving objects in the cities can be used in various applications such as environmental monitoring, traffic control and recreational purposes. A mobile sensor network can be formed by sensors carried by people or buses. In this paper, we will present a mobile sensor network programming system (MSNPS) that can program or reprogram such mobile sensor networks. The programming process is usually initiated by a user from the Internet. MSNPS uses a gateway protocol to bridge the Internet and sensor network, so that control and data messages can be exchanged between these two networks. MSNPS sends the program data to the targeted sensor platforms using a tree structure formed by control messages. We developed a prototype implementation, and analyzed MSNPS system performance. We also simulated the system in a mobile sensor network.