在2G/3G减频退网背景下,窄带物联网(narrow band Internet of things,NB-IoT)和LTE UE-Category 1(即用户设备能够支持的4G LTE网络传输速率的等级,简称LTE Cat.1)承接其业务发展已是大势所趋。在回顾分析2G/3G物联网业务的发展现状及趋...在2G/3G减频退网背景下,窄带物联网(narrow band Internet of things,NB-IoT)和LTE UE-Category 1(即用户设备能够支持的4G LTE网络传输速率的等级,简称LTE Cat.1)承接其业务发展已是大势所趋。在回顾分析2G/3G物联网业务的发展现状及趋势,重点梳理国内三大运营商在终端、网络以及应用层面的物联网业务发展策略的基础之上,总结概括了电信运营商在NB-IoT和LTE Cat.1业务领域现有的流量主导型、平台支撑型和应用赋能型3种商业模式。最后,从商机拓展、产品营销和团队服务3个方面展望了未来商业模式的升级之路。展开更多
Internet of Things (IoT) devices are increasingly being fotmd in civilian and military contexts, ranging from smart cities and smart grids to Internet-of-Medical-Things, Internet-of-Vehicles, Internet-of-Military-Th...Internet of Things (IoT) devices are increasingly being fotmd in civilian and military contexts, ranging from smart cities and smart grids to Internet-of-Medical-Things, Internet-of-Vehicles, Internet-of-Military-Things, Internet-of- Battlefield-Things, etc. In this paper, we survey articles presenting IoT security solutions published in English since January 2016. We make a nmnber of observations, including the lack of publicly available loT datasets that can be used by the research and practitioner communities. Given the potentially sensitive nature of IoT datasets, there is a need to develop a standard for sharing IoT datasets among the research and practitioner communities and other relevant stakeholders. Thus, we posit the potential for blockehain technology in facilitating secure sharing of IoT datasets (e.g., using blockchain to ensure the integrity of shared datasets) and securing loT systems, before presenting two conceptual blockchain-based approaches. We then conclude this paper with nine potential research questions.展开更多
A novel Wireless Fidelity (WiFi) over fiber link and a wavelength assignment protocol are proposed to provide sufficient bandwidth and extensive coverage range for the various applications in the Internet of Things (I...A novel Wireless Fidelity (WiFi) over fiber link and a wavelength assignment protocol are proposed to provide sufficient bandwidth and extensive coverage range for the various applications in the Internet of Things (IoT).The performance of the WiFi over fiber-based wireless IoT network is evaluated in terms of error vector magnitude (EVM) and data throughput for both the up and down links between the WiFi central control system and remote radio units (RRUs).The experimental results illustrate the reliability of the fiber transmission of 64 Quadrature Amplitude Modulation (64QAM) WiFi signals by direct analog modulation.In order to efficiently utilize the wavelength resources,we also demonstrated the wavelength assignment protocol by employing optical switching configurations in Central Station (CS) to realize the wavelength switching,and the simulation results indicate the queuing size and the corresponding queue delay for different numbers of available wavelengths.展开更多
The next wave of communication and applications will rely on new services provided by the Internet of Things which is becoming an important aspect in human and machines future. IoT services are a key solution for prov...The next wave of communication and applications will rely on new services provided by the Internet of Things which is becoming an important aspect in human and machines future. IoT services are a key solution for providing smart environments in homes, buildings, and cities. In the era of massive number of connected things and objects with high growth rate, several challenges have been raised, such as management, aggregation, and storage for big produced data. To address some of these issues, cloud computing emerged to the IoT as Cloud of Things (COT), which provides virtually unlimited cloud services to enhance the large-scale IoT platforms. There are several factors to be considered in the design and implementation of a CoT platform. One of the most important and challenging problems is the heterogeneity of different objects. This problem can be addressed by deploying a suitable "middleware" which sits between things and applications as a reliable platform for communication among things with different interfaces, operating systems, and architectures. The main aim of this paper is to study the middleware technologies for CoT. Toward this end, we first present the main features and characteristics of middlewares. Next, we study different architecture styles and service domains. Then, we present several middlewares that are suitable for CoT-based platforms and finally, a list of current challenges and issues in the design of CoT-based middlewares is discussed.展开更多
A great number of sensor technologies are applied in the Intemet of Things (loT) currently and more are emerging, which rmkes the loT a heterogeneous network. This paper discusses the convergence and integration pro...A great number of sensor technologies are applied in the Intemet of Things (loT) currently and more are emerging, which rmkes the loT a heterogeneous network. This paper discusses the convergence and integration problem in IoT. A Service-Oriented Middleware for Heterogeneous Environment (SOMHE) in IoT is proposed. The purpose of the middleware is to shield the differ- ence between protocols in the sensor layers such as Radio Frequency Identification (RFID) and Zig-Bee by defining the data conversion and mapping model. A Web service interface is supplied by this middleware, thus the complexity of high level appli-cation development can be reduced greatly. The feasibility and reliability of this middleware is veri-fied by a demonstration systelTL展开更多
文摘在2G/3G减频退网背景下,窄带物联网(narrow band Internet of things,NB-IoT)和LTE UE-Category 1(即用户设备能够支持的4G LTE网络传输速率的等级,简称LTE Cat.1)承接其业务发展已是大势所趋。在回顾分析2G/3G物联网业务的发展现状及趋势,重点梳理国内三大运营商在终端、网络以及应用层面的物联网业务发展策略的基础之上,总结概括了电信运营商在NB-IoT和LTE Cat.1业务领域现有的流量主导型、平台支撑型和应用赋能型3种商业模式。最后,从商机拓展、产品营销和团队服务3个方面展望了未来商业模式的升级之路。
文摘Internet of Things (IoT) devices are increasingly being fotmd in civilian and military contexts, ranging from smart cities and smart grids to Internet-of-Medical-Things, Internet-of-Vehicles, Internet-of-Military-Things, Internet-of- Battlefield-Things, etc. In this paper, we survey articles presenting IoT security solutions published in English since January 2016. We make a nmnber of observations, including the lack of publicly available loT datasets that can be used by the research and practitioner communities. Given the potentially sensitive nature of IoT datasets, there is a need to develop a standard for sharing IoT datasets among the research and practitioner communities and other relevant stakeholders. Thus, we posit the potential for blockehain technology in facilitating secure sharing of IoT datasets (e.g., using blockchain to ensure the integrity of shared datasets) and securing loT systems, before presenting two conceptual blockchain-based approaches. We then conclude this paper with nine potential research questions.
基金supported by the National Natural Science Foundation of China (Nos.60702006,60736002,60837004,60736036,60932004and61001121)the MOST International Cooperation Program(No.2008DFA11670)+1 种基金the 111 Project(No.B07005)the project funded by State Key Laboratory of AOCSN,China
文摘A novel Wireless Fidelity (WiFi) over fiber link and a wavelength assignment protocol are proposed to provide sufficient bandwidth and extensive coverage range for the various applications in the Internet of Things (IoT).The performance of the WiFi over fiber-based wireless IoT network is evaluated in terms of error vector magnitude (EVM) and data throughput for both the up and down links between the WiFi central control system and remote radio units (RRUs).The experimental results illustrate the reliability of the fiber transmission of 64 Quadrature Amplitude Modulation (64QAM) WiFi signals by direct analog modulation.In order to efficiently utilize the wavelength resources,we also demonstrated the wavelength assignment protocol by employing optical switching configurations in Central Station (CS) to realize the wavelength switching,and the simulation results indicate the queuing size and the corresponding queue delay for different numbers of available wavelengths.
文摘The next wave of communication and applications will rely on new services provided by the Internet of Things which is becoming an important aspect in human and machines future. IoT services are a key solution for providing smart environments in homes, buildings, and cities. In the era of massive number of connected things and objects with high growth rate, several challenges have been raised, such as management, aggregation, and storage for big produced data. To address some of these issues, cloud computing emerged to the IoT as Cloud of Things (COT), which provides virtually unlimited cloud services to enhance the large-scale IoT platforms. There are several factors to be considered in the design and implementation of a CoT platform. One of the most important and challenging problems is the heterogeneity of different objects. This problem can be addressed by deploying a suitable "middleware" which sits between things and applications as a reliable platform for communication among things with different interfaces, operating systems, and architectures. The main aim of this paper is to study the middleware technologies for CoT. Toward this end, we first present the main features and characteristics of middlewares. Next, we study different architecture styles and service domains. Then, we present several middlewares that are suitable for CoT-based platforms and finally, a list of current challenges and issues in the design of CoT-based middlewares is discussed.
基金This paper was supported by the National Natural Science Foundation of China under Crant No. NSFC-61170176 the Na-tional Great Science Specific Project under Grants No. 2010ZX03005-001-03, No2011ZX03005-004-02 the Beijing Munici-pal Con-rnission of Education Build Together Project and Minis-try of Education Infrastructure Construction Project (2-5-2).
文摘A great number of sensor technologies are applied in the Intemet of Things (loT) currently and more are emerging, which rmkes the loT a heterogeneous network. This paper discusses the convergence and integration problem in IoT. A Service-Oriented Middleware for Heterogeneous Environment (SOMHE) in IoT is proposed. The purpose of the middleware is to shield the differ- ence between protocols in the sensor layers such as Radio Frequency Identification (RFID) and Zig-Bee by defining the data conversion and mapping model. A Web service interface is supplied by this middleware, thus the complexity of high level appli-cation development can be reduced greatly. The feasibility and reliability of this middleware is veri-fied by a demonstration systelTL