The Internet of things (IoT) can be used in our daily life. Home area network (HAN) is one of the applications of loT. However, deploying HAN for underdeveloped countries in Africa is not easy due to the lack of Inter...The Internet of things (IoT) can be used in our daily life. Home area network (HAN) is one of the applications of loT. However, deploying HAN for underdeveloped countries in Africa is not easy due to the lack of Internet connectivity and stable electricity. First of all, Internet in Africa is growing fast but the majority of countries in Africa have Internet penetration of less than 10%. Furthermore, the problem of accessing electricity varies greatly across African countries, which is still less than 30% of the average usage rate. The aim of this paper is to model a secure HAN based on IoT for resource constraints environment, which are focused on both network connectivity and energy stability. Poor connectivity, the prevalence of low-end devices and several other obstacles should be considered for the secure HAN deployment in developing and underdeveloped countries. The proposed HAN model will provide the resource constraints module composed of network connectivity function and energy stability function to support the two constraints based on the IoT basic module and the security and privacy module. The proposed HAN model could be securely applied to various countries HAN applications with poor electricity supply and network connectivity.展开更多
随着信息技术的飞速发展,人们的日常工作与生活中开始融入智能、网络及云计算。而这些先进技术的实现需要依赖互联网主干网的接入,其在实际接入时,依然存在着瓶颈的情况。现阶段,该技术也是化解互联网主干网接入瓶颈的最佳方法。文章深...随着信息技术的飞速发展,人们的日常工作与生活中开始融入智能、网络及云计算。而这些先进技术的实现需要依赖互联网主干网的接入,其在实际接入时,依然存在着瓶颈的情况。现阶段,该技术也是化解互联网主干网接入瓶颈的最佳方法。文章深入分析光纤到户(Fiber To The Home,FTTH)技术的概念和基本特征,并提出了小区FTTH技术设计的有效策略和具体的案例。展开更多
In the scenario of multiple wireless personal area networks （WPANs） accessing the home area network （HAN）, the frequency-shift （FRESH）filter based on the cyclostationary theory is applied for the anti-interferen...In the scenario of multiple wireless personal area networks （WPANs） accessing the home area network （HAN）, the frequency-shift （FRESH）filter based on the cyclostationary theory is applied for the anti-interference at the 2. 4 GHz spectrum. The main architecture of multiple WPANs accessing the HAN is proposed. The medium access control（ MAC） -level coordination solution applied in the access point （AP）for the coexistence of different communication protocols within WPAN is discussed. The diagram of the adaptive FRESH filter is described. The anti-interference models of the FRESH filter in the scenario of multiple WPANs accessing the HAN are proposed. The minimum mean square error （MMSE）convergence property of the FRESH filter with the change in the data point number is analyzed. The simulation results indicate that the FRESH filter can effectively extract the signal of interest （SOI） from the interference with the partly overlapped spectrum. Thus, the excellent anti-interference performance of the FRESH filter is validated. Moreover, by both theoretical analysis and simulation, the MMSE convergent property of the FRESH filter is also proven.展开更多
以OMAP3530为控制核心、CC2530为无线控制核心,采用ARM与ZigBee技术,设计完成了一个无线智能家居控制系统.智能网关通过以太网控制家居内部的电器设备,采用ZigBee通信技术完成家庭无线局域网搭建;软件开发是在Windows Embedded CE 6.0...以OMAP3530为控制核心、CC2530为无线控制核心,采用ARM与ZigBee技术,设计完成了一个无线智能家居控制系统.智能网关通过以太网控制家居内部的电器设备,采用ZigBee通信技术完成家庭无线局域网搭建;软件开发是在Windows Embedded CE 6.0开发环境的宿主机上,开发出智能家居远程控制应用程序,从而实现对家居电器管理和控制的智能化.该系统具有传输快捷安全、组网简易灵活等优点,在未来市场中具有良好的竞争力.展开更多
文摘The Internet of things (IoT) can be used in our daily life. Home area network (HAN) is one of the applications of loT. However, deploying HAN for underdeveloped countries in Africa is not easy due to the lack of Internet connectivity and stable electricity. First of all, Internet in Africa is growing fast but the majority of countries in Africa have Internet penetration of less than 10%. Furthermore, the problem of accessing electricity varies greatly across African countries, which is still less than 30% of the average usage rate. The aim of this paper is to model a secure HAN based on IoT for resource constraints environment, which are focused on both network connectivity and energy stability. Poor connectivity, the prevalence of low-end devices and several other obstacles should be considered for the secure HAN deployment in developing and underdeveloped countries. The proposed HAN model will provide the resource constraints module composed of network connectivity function and energy stability function to support the two constraints based on the IoT basic module and the security and privacy module. The proposed HAN model could be securely applied to various countries HAN applications with poor electricity supply and network connectivity.
文摘随着信息技术的飞速发展,人们的日常工作与生活中开始融入智能、网络及云计算。而这些先进技术的实现需要依赖互联网主干网的接入,其在实际接入时,依然存在着瓶颈的情况。现阶段,该技术也是化解互联网主干网接入瓶颈的最佳方法。文章深入分析光纤到户(Fiber To The Home,FTTH)技术的概念和基本特征,并提出了小区FTTH技术设计的有效策略和具体的案例。
基金The National Basic Research Program of China(973Program)(No.2007CB310606)the National Natural Science Foundation of China(No.60472053)+1 种基金the High Technology Research and Development Program of Jiangsu Province(No.BG2006002)the Specialized Development Foundation for the Achievement Transformation of Jiangsu Province(No.BA2006101)
文摘In the scenario of multiple wireless personal area networks （WPANs） accessing the home area network （HAN）, the frequency-shift （FRESH）filter based on the cyclostationary theory is applied for the anti-interference at the 2. 4 GHz spectrum. The main architecture of multiple WPANs accessing the HAN is proposed. The medium access control（ MAC） -level coordination solution applied in the access point （AP）for the coexistence of different communication protocols within WPAN is discussed. The diagram of the adaptive FRESH filter is described. The anti-interference models of the FRESH filter in the scenario of multiple WPANs accessing the HAN are proposed. The minimum mean square error （MMSE）convergence property of the FRESH filter with the change in the data point number is analyzed. The simulation results indicate that the FRESH filter can effectively extract the signal of interest （SOI） from the interference with the partly overlapped spectrum. Thus, the excellent anti-interference performance of the FRESH filter is validated. Moreover, by both theoretical analysis and simulation, the MMSE convergent property of the FRESH filter is also proven.
文摘以OMAP3530为控制核心、CC2530为无线控制核心,采用ARM与ZigBee技术,设计完成了一个无线智能家居控制系统.智能网关通过以太网控制家居内部的电器设备,采用ZigBee通信技术完成家庭无线局域网搭建;软件开发是在Windows Embedded CE 6.0开发环境的宿主机上,开发出智能家居远程控制应用程序,从而实现对家居电器管理和控制的智能化.该系统具有传输快捷安全、组网简易灵活等优点,在未来市场中具有良好的竞争力.
