针对轨道区段占用检测系统的网络通信需求,研发一种高效可靠的基于阿里云平台的窄带物联网(Narrow Band Internet of Things,NB-IoT)网络通信节点。利用光纤光栅传感器、超声波探头等设备采集轨道区段的列车占用信息和钢轨裂缝探伤检测...针对轨道区段占用检测系统的网络通信需求,研发一种高效可靠的基于阿里云平台的窄带物联网(Narrow Band Internet of Things,NB-IoT)网络通信节点。利用光纤光栅传感器、超声波探头等设备采集轨道区段的列车占用信息和钢轨裂缝探伤检测信息,通过基于移远BC260Y模组所设计的NB-IoT无线通信节点将数据上传到阿里云平台进行数据记录。通过上位机和App程序,用户可以实时查看轨道区段的占用检测信息和钢轨的损伤情况。所设计的NB-IoT网络通信节点主要包含4个方面,分别为NB-IoT模块电路、串口通信模块电路、USIM接口模块电路和电源模块电路。不同于传统的“两跳”方案,所设计的NB-IoT网络通信节点无需中间网关设备,具备广泛的覆盖范围、低终端功耗以及高成本效益等特点,可有效提升高铁轨道区段占用检测的网络通信效率和可靠性。展开更多
The rapid expansion of Internet of Things(IoT)devices deploys various sensors in different applications like homes,cities and offices.IoT applications depend upon the accuracy of sensor data.So,it is necessary to pred...The rapid expansion of Internet of Things(IoT)devices deploys various sensors in different applications like homes,cities and offices.IoT applications depend upon the accuracy of sensor data.So,it is necessary to predict faults in the sensor and isolate their cause.A novel primitive technique named fall curve is presented in this paper which characterizes sensor faults.This technique identifies the faulty sensor and determines the correct working of the sensor.Different sources of sensor faults are explained in detail whereas various faults that occurred in sensor nodes available in IoT devices are also presented in tabular form.Fault prediction in digital and analog sensors along with methods of sensor fault prediction are described.There are several advantages and disadvantages of sensor fault prediction methods and the fall curve technique.So,some solutions are provided to overcome the limitations of the fall curve technique.In this paper,a bibliometric analysis is carried out to visually analyze 63 papers fetched from the Scopus database for the past five years.Its novelty is to predict a fault before its occurrence by looking at the fall curve.The sensing of current flow in devices is important to prevent a major loss.So,the fall curves of ACS712 current sensors configured on different devices are drawn for predicting faulty or non-faulty devices.The analysis result proved that if any of the current sensors gets faulty,then the fall curve will differ and the value will immediately drop to zero.Various evaluation metrics for fault prediction are also described in this paper.At last,this paper also addresses some possible open research issues which are important to deal with false IoT sensor data.展开更多
The standard specification of IEEE 802.15.4 is called ZigBee Propocol. ZigBee protocol required security, low data transfer rate, power efficient network. In addition, the ZigBee mobility function makes the ZigBee net...The standard specification of IEEE 802.15.4 is called ZigBee Propocol. ZigBee protocol required security, low data transfer rate, power efficient network. In addition, the ZigBee mobility function makes the ZigBee network more interactive and multi-purpose. The ZigBee mobile node has a significant effect on network parameters, namely MAC delay, end-to-end delay, MAC throughput and network load. However, a particular significant ZigBee node affects network data traffic and reduces the strength of the Quality of Service (QoS). The key issues are to analyze the QoS in order to increase overall performance of the network. The study proposes a ZigBee network with the mobile node and fixed node based on a variety of MAC layer settings. The Riverbed Network Simulator (Academic Modeler Release 17.5) is used for configuring and simulating the ZigBee network in a variety of conditions. The simulation results show that ZigBee with a fixed node performs better than the ZigBee mobile node. The ZigBee network with fixed node produces a lower network load and a high ratio of successfully transmitted data. The analysis of this study allows the ZigBee network to be better designed.展开更多
The pervasive advancement in the field of an autonomous system is significantly influenced by the concept of integrating a large number of devices. The use Internet of Things (IoT) has increased day by day for making ...The pervasive advancement in the field of an autonomous system is significantly influenced by the concept of integrating a large number of devices. The use Internet of Things (IoT) has increased day by day for making connected devices over the internet. Besides, mobile sensing devices operated by IoT including smartphones, tablets, digital cameras, sensors, etc. are providing access to a large variety of data and services based on human interaction. In this paper, the implementation and analysis of an IoT-based home automation framework using NodeMCU through the MQTT protocol are described. This helps the users to monitor and control home appliances from remote places by using a mobile application over the internet.展开更多
随着物联网技术的不断发展,窄带物联网(Narrow Band-Internet of Things,NB-IoT)技术凭借低功耗、广覆盖、大容量等特点,逐步步入人们的视野。为了保证物理层的通信安全,传统做法是进行数据加密。但是,在NB-IoT网络中,低功耗在加密算法...随着物联网技术的不断发展,窄带物联网(Narrow Band-Internet of Things,NB-IoT)技术凭借低功耗、广覆盖、大容量等特点,逐步步入人们的视野。为了保证物理层的通信安全,传统做法是进行数据加密。但是,在NB-IoT网络中,低功耗在加密算法的复杂度上有一定的要求。太复杂的加密算法会加大终端的耗电量,这与低功耗要求相悖。因此,考虑在物理层采用窃听信道模型。窃听信道模型的初衷是从信息论的角度出发,不采用复杂的密码学技术来保证通信安全。同时,考虑实际中窃听节点会对接收节点产生一定的干扰,分析在该干扰存在的情况下干扰节点的位置、数量以及功率分配对系统中安全容量的影响。展开更多
文摘针对轨道区段占用检测系统的网络通信需求,研发一种高效可靠的基于阿里云平台的窄带物联网(Narrow Band Internet of Things,NB-IoT)网络通信节点。利用光纤光栅传感器、超声波探头等设备采集轨道区段的列车占用信息和钢轨裂缝探伤检测信息,通过基于移远BC260Y模组所设计的NB-IoT无线通信节点将数据上传到阿里云平台进行数据记录。通过上位机和App程序,用户可以实时查看轨道区段的占用检测信息和钢轨的损伤情况。所设计的NB-IoT网络通信节点主要包含4个方面,分别为NB-IoT模块电路、串口通信模块电路、USIM接口模块电路和电源模块电路。不同于传统的“两跳”方案,所设计的NB-IoT网络通信节点无需中间网关设备,具备广泛的覆盖范围、低终端功耗以及高成本效益等特点,可有效提升高铁轨道区段占用检测的网络通信效率和可靠性。
基金supported by Taif University Researchers supporting Project number(TURSP-2020/347),Taif University,Taif,Saudi Arabia.
文摘The rapid expansion of Internet of Things(IoT)devices deploys various sensors in different applications like homes,cities and offices.IoT applications depend upon the accuracy of sensor data.So,it is necessary to predict faults in the sensor and isolate their cause.A novel primitive technique named fall curve is presented in this paper which characterizes sensor faults.This technique identifies the faulty sensor and determines the correct working of the sensor.Different sources of sensor faults are explained in detail whereas various faults that occurred in sensor nodes available in IoT devices are also presented in tabular form.Fault prediction in digital and analog sensors along with methods of sensor fault prediction are described.There are several advantages and disadvantages of sensor fault prediction methods and the fall curve technique.So,some solutions are provided to overcome the limitations of the fall curve technique.In this paper,a bibliometric analysis is carried out to visually analyze 63 papers fetched from the Scopus database for the past five years.Its novelty is to predict a fault before its occurrence by looking at the fall curve.The sensing of current flow in devices is important to prevent a major loss.So,the fall curves of ACS712 current sensors configured on different devices are drawn for predicting faulty or non-faulty devices.The analysis result proved that if any of the current sensors gets faulty,then the fall curve will differ and the value will immediately drop to zero.Various evaluation metrics for fault prediction are also described in this paper.At last,this paper also addresses some possible open research issues which are important to deal with false IoT sensor data.
文摘The standard specification of IEEE 802.15.4 is called ZigBee Propocol. ZigBee protocol required security, low data transfer rate, power efficient network. In addition, the ZigBee mobility function makes the ZigBee network more interactive and multi-purpose. The ZigBee mobile node has a significant effect on network parameters, namely MAC delay, end-to-end delay, MAC throughput and network load. However, a particular significant ZigBee node affects network data traffic and reduces the strength of the Quality of Service (QoS). The key issues are to analyze the QoS in order to increase overall performance of the network. The study proposes a ZigBee network with the mobile node and fixed node based on a variety of MAC layer settings. The Riverbed Network Simulator (Academic Modeler Release 17.5) is used for configuring and simulating the ZigBee network in a variety of conditions. The simulation results show that ZigBee with a fixed node performs better than the ZigBee mobile node. The ZigBee network with fixed node produces a lower network load and a high ratio of successfully transmitted data. The analysis of this study allows the ZigBee network to be better designed.
文摘The pervasive advancement in the field of an autonomous system is significantly influenced by the concept of integrating a large number of devices. The use Internet of Things (IoT) has increased day by day for making connected devices over the internet. Besides, mobile sensing devices operated by IoT including smartphones, tablets, digital cameras, sensors, etc. are providing access to a large variety of data and services based on human interaction. In this paper, the implementation and analysis of an IoT-based home automation framework using NodeMCU through the MQTT protocol are described. This helps the users to monitor and control home appliances from remote places by using a mobile application over the internet.
文摘随着物联网技术的不断发展,窄带物联网(Narrow Band-Internet of Things,NB-IoT)技术凭借低功耗、广覆盖、大容量等特点,逐步步入人们的视野。为了保证物理层的通信安全,传统做法是进行数据加密。但是,在NB-IoT网络中,低功耗在加密算法的复杂度上有一定的要求。太复杂的加密算法会加大终端的耗电量,这与低功耗要求相悖。因此,考虑在物理层采用窃听信道模型。窃听信道模型的初衷是从信息论的角度出发,不采用复杂的密码学技术来保证通信安全。同时,考虑实际中窃听节点会对接收节点产生一定的干扰,分析在该干扰存在的情况下干扰节点的位置、数量以及功率分配对系统中安全容量的影响。
