传感器网络技术与标准化连载(四)传感器网络通信与信息交互技术解析

通信与信息交互是传感器网络的核心技术和协议.概述了传感器网络的标准化现状,对传感器网络标准体系中涉及通信与信息交互的相关技术进行分析.重点分析了主要标准技术方案和关键技术,指出传感器网络面临的主要技术挑战.     

传感器网络通信与信息交互技术解析

通信与信息交互是传感器网络的核心技术和协议。概述了传感器网络的标准化现状。对传感器网络标准体系中涉及通信与信息交互的相关技术进行分析。重点分析了主要标准技术方案和关键技术。指出传感器网络面临的主要技术挑战。     

泛在传感器网络标准体系与系统架构研究

作为必不可少的顶层设计和路线指南,标准体系和系统架构的研究在泛在传感器网络标准制定过程中占据着极为重要的地位,关系到泛在传感器网络标准制定的方向和成败。本文在介绍了传感器网络国际和国内标准化现状的基础上,探讨了传感器网络标准体系和系统架构的研究工作。     

物联网标准体系研究与产业发展策略

对物联网与射频识别（RFID）、传感器网络和泛在网的关系进行了分析,在此基础上给出物联网的技术架构和标准体系框架,对我国物联网相关标准的制定具有指导意义,最后阐述了我国物联网产业的发展策略。     

传感器网络技术与标准化连载(一)传感器网络与智慧地球

随着传感器网络的快速发展,将进一步推动计算机、互联网、移动通信的发展和融合,形成全新的产业和运营模式。传感器网络可以广泛地应用于智能电网、智能交通、公共安全、环境监测、工业监测、精细农业、个人健康、节能减排等社会、生活的各个领域,成为衡量一个国家科技发展水平的标志,日益受到各国战略层面的重视。 由于传感器网络应用众多,产品差异化大,极大地影响着传感器网络标准的制定和大规模产业化,传感器网络标准的制定是一个全新的挑战。从本期开始,我们将刊登系列文章,介绍传感器网络中的关键技术和相关国际标准。     

我国数字家庭多媒体技术正式成为IEC国际标准

6月8日,中国物联网标准联合工作组在北京成立,以推进物联网技术的研究和标准的制定。工作组由工信部电子标签标准工作组、全国信标委传感器网络标准工作组、全国智标委等19家相关标准化组织自愿联合组成。工信部电子标签标准工作组组长张琪担任联合工作组的组长,全国信标委传感器网络标准工作组组长刘海涛担任常务副组长。     

无线传感器网络标椎化综述

介绍了无线传感器网络基本概念和简要背景;分析、概括了国内外无线传感器网络标准化概况.阐述了国内外无线传感器网络标准化组织的建立.发展以及开展的工作.对几个重要的标准进行了简单的介绍.结合我国现状,对未来无线传感器网络标准化工作进行了探讨.     

国家传感器网络标准工作组最新进展

国家传感器网络标准工作组于2011年12月15日在北京召开工作组第九次会议,此次会议对2011年度对工作组标准化工作进展情况进行了汇报和下一步的进度安排,同时对未来的工作规划做了展望。传感器网络是物联网的核心,物联网主要通过感知层、网络层和应用层来实现物与物之间的信息交换。其中,感知层技术是物联网的基础,传感器标准制定工作具有极高的重要性。为尽快在物联网核心技     

面向WIA-PA工业无线传感器网络的确定性调度算法

WIA-PA （Wireless Networks for Industrial Automation-Process Automation）是我国自主制定的工业无线传感器网络标准,确定性调度技术是其中一项关键技术.但目前已有的确定性调度算法主要集中在通用传感器网络或WirelessHART,ISA100.11a等遵循国外标准的工业无线传感器网络中,未能针对WIA-PA网络进行优化设计.鉴于此,本文提出了一种适用于WIA-PA网络的基于回溯法的最优确定性调度算法,能够获取调度解的最大成功率;并以此为基础,进一步提出了一种基于最小时间裕度优先的时分多址调度算法（Least Slack First on Time Division Multiple Access,LSF-TDMA）.仿真实验结果表明,所提出的LSF-TDMA算法能够满足WIA-PA网络端到端数据传输的确定性需求,在调度解获取成功率接近于最优的同时,有效降低了算法复杂度.     

依赖IEEE802.15.4的无线传感器网络在灯光控制中的应用

无线传感器网络综合了传感器技术、嵌入式计算技术、分布式信息处理技术和无线通信技术,是计算机科学技术的一个新的研究领域,具有十分广阔的应用前景.文章介绍了IEEE 802.15.4标准,对无线传感器网络平台的结构设计和无线传输网络的具体实现过程进行了阐述。并在此基础上设计了一种基于IEEE 802.15.4标准的无线传感器网络,传感器对周围的光强度信息进行采集,内嵌的单片机对数据进行处理,通过基于IEEE 802.15.4标准的无线模块进行传输。     

无线传感器网络与自组织网络的研究现状

传感器网络综合了传感器技术、嵌入式计算技术、分布式信息处理技术和无线通信技术,是计算机科学技术的一个新的研究领域;自组织网络是一种移动、多跳、自律式系统,两者均具有十分广阔的应用前景.文章对传感器网络和自组织网络的概念、特征和发展动态等问题进行了介绍,重点分析了目前这两种网络的关键技术和研究现状.文章认为:传感器网络在特殊领域有着传统技术不可比拟的优势,而无线自组织网络通过临时组网的方式在恶劣环境中支持移动节点之间的无线传输,应用范围广阔.对这些网络的研究是中国未来高技术民用和军事发展的需要.     

Distributed source coding for sensor networks

In recent years, sensor research has been undergoing a quiet revolution, promising to have a significant impact throughout society that could quite possibly dwarf previous milestones in the information revolution. Realizing the great promise of sensor networks requires more than a mere advance in individual technologies. It relies on many components working together in an efficient, unattended, comprehensible, and trustworthy manner. One of the enabling technologies in sensor networks is the distributed source coding (DSC), which refers to the compression of the multiple correlated sensor outputs that does not communicate with each other. DSC allows a many-to-one video coding paradigm that effectively swaps encoder-decoder complexity with respect to conventional video coding, thereby representing a fundamental concept shift in video processing. This article has presented an intensive discussion on two DSC techniques, namely Slepian-Wolf coding and Wyner-Ziv coding. The Slepian and Wolf coding have theoretically shown that separate encoding is as efficient as joint coding for lossless compression in channel coding.     

A Security Model Based on Relational Model for Semantic Sensor Networks

This paper proposes a novel security model for secure query processing in semantic sensor networks. A semantic sensor network (SSN) is a sensor network including semantics of sensory data and context information, and relationships between the semantics by using Semantic Web technologies. Even though much research has been activated on SSN, there is little activity on how to securely access data in semantic sensor networks. Most of storages have been developed based on relational database model and the relational database model provides a secure and robust security support. Therefore, we need to devise a security model considering such a real environment. This paper proposes a new access control model for secure query processing in semantic sensor networks. The proposed security model is based on relational database security model. This paper shows the overall framework and definitions of the proposal, and the experiment and evaluation is described to show validity of our proposal. With the experiment and evaluation, it is clear that the proposed model provides a secure access control support for SSNs.     

The ITU's role in the standardization of the GII

The ITU has embarked on a standardization program for the global information infrastructure (GII) with the fundamental objective that the GII will be a “federation of networks” consisting of seamlessly interconnected and interoperable communication networks, information processing equipment, databases, and terminals. This article describes the objectives of the ITU studies and outlines the key results so far achieved in the areas of framework architectures and scenarios     

无线传感器网络的路由协议研究

微机电系统、处理器、无线通信及存储技术的进步促进了无线传感器网络的飞速发展,使得无线传感器网络成为一种全新的信息获取和处理技术。在对其网络特点进行分析的基础上,介绍了无线传感器网络体系结构。路由技术是无线传感器网络通信层的核心技术,也是其组网的基础,着重讨论了无线传感器网络的路由协议的特点及其相关问题。     

Broadband multimedia applications using ATM networks:high-performance computing, high-capacity storage, and high-speedcommunication

The authors discuss the classification of a large variety of multimedia communication applications (with the emphasis on broadband and hypermedia applications), the requirements at network levels, multimedia communications concepts with suitable platforms, and the modular standardization of multimedia teleservices and the corresponding technical systems. Appropriate technologies for meeting multimedia requirements comprise public and private networks, servers for information storage and processing, intelligent user and system agents, and multimedia terminals, e.g., workstations. The authors deal with the question of service-specific or service-integrated networks, the architecture, components, and functions of asynchronous transfer model (ATM) switching systems for broadband ISDN and ATM-based signaling, and management for controlling connectivity and interactivity. Network evolution, pilot applications, and coordinated standardization are briefly considered     

Sensor networks: evolution, opportunities, and challenges

Wireless microsensor networks have been identified as one of the most important technologies for the 21st century. This paper traces the history of research in sensor networks over the past three decades, including two important programs of the Defense Advanced Research Projects Agency (DARPA) spanning this period: the Distributed Sensor Networks (DSN) and the Sensor Information Technology (SensIT) programs. Technology trends that impact the development of sensor networks are reviewed, and new applications such as infrastructure security, habitat monitoring, and traffic control are presented. Technical challenges in sensor network development include network discovery, control and routing, collaborative signal and information processing, tasking and querying, and security. The paper concludes by presenting some recent research results in sensor network algorithms, including localized algorithms and directed diffusion, distributed tracking in wireless ad hoc networks, and distributed classification using local agents.     

传感器网络研究综述

传感器网络是计算机科学技术的一个新的研究领域，集成了传感器、微机电系统和网络三大技术而形成的传感器网络是一种全新的信息获取和处理技术。在介绍传感器网络的基本概念与体系结构的基础上，总结了传感器网络的研究热点问题和关键技术，并详细阐述了包括低功耗路由技术和介质访问控制方法等在内的几个热点研究问题；最后，分析了一些有价值的应用领域。     

Analyzing localization errors in one-dimensional sensor networks

One-dimensional sensor networks can be found in many fields and demand node location information for various applications. Developing localization algorithms in one-dimensional sensor networks is trivial, due to the fact that existing localization algorithms developed for two- and three-dimensional sensor networks are applicable; nevertheless, analyzing the corresponding localization errors is non-trivial at all, because it is helpful to improving localization accuracy and designing sensor network applications. This paper deals with localization errors in distance-based multi-hop localization procedures of one-dimensional sensor networks through the Cramér-Rao lower bound (CRLB). We analyze the fundamental behaviors of localization errors and show that the localization error for a sensor is locally determined by network elements within a certain range of this sensor. Moreover, we break down the analysis of localization errors in a large-scale sensor network into the analysis in small-scale sensor networks, termed unit networks, in which tight upper and lower bounds on the CRLB can be established. Finally, we investigate two practical issues: the applicability of the analysis based on the CRLB and the optimal anchor placement.