最新刊期
卷 1 ， 期 3 ， 2017
- 摘要：The development trend of China's information industry is described.Structure of IoT industry is analyzed.The development trend of IoT industry and the generalization and application situation of IoT are discussed.关键词：internet of things;industry development;smart city;intelligent manufacturing3440|4413|0更新时间：2024-06-05
- 摘要：According to the requirements of interconnection of all things,background of development of establishing IoT using the LEO satellite communication network is researched.The development status of LEO IoT at home and abroad is analyzed,and the technical challenges and research content of LEO IoT are discussed.关键词：IoT;LEO communications;LEO IoT;technical challenges;development status6315|3726|0更新时间：2024-06-05
- 摘要：The Internet of Things (IoT) is a collection of devices,sensors and computing capabilities that enable intelligent command and control across vast regions in an automated manner,where data is generated by large-scaled devices and often sent to a centralized system for processing.Therefore,for IoT scenarios,it is important to have an efficient way to collect data at low power,transmit them in very short time,process them in close to real time,and send back the results of this processing.The main data problems in IoT are investigated,and the data entities are organized to form a network,coined as the Internet of Data (IoD),which has huge potential in data-intensive applications.To better understand IoD,the basic concept and main challenges of IoD are also stated.Meanwhile,to provide more detailed understanding,some feasible techniques that can be used in IoD are also explored,like big data,data mining and artificial intelligence,which are all hot research areas and have been studied extensively in recent years.关键词：IoT;IoD;data processing2674|2959|0更新时间：2024-06-05
Invitation and Review
- 摘要：The high transmission rate characteristic of millimeter wave (mmWave) technology can meet the requirements of large amount of data communications among intelligent devices for indoor scenario.While guaranteeing high throughput,reducing the interference simultaneously in a closed region is still a challenge.For indoor transmission,the human bodies are considered as main blockages besides common blockages.Thus,a new system model is presented,constructing the human body into a self-blockage model,while using multi-ball LOS link state model to describe the conventional blockage.The combination of the two will give a more comprehensive and accurate expression of indoor obstruction.The proposed model uses stochastic geometry to analyze system performance by giving a closed expression of coverage and rate.The simulation results show that the model is accurate to describe the distribution of blockages via the comparison between analysis and Monte Carlo simulations.关键词：millimeter wave;D2D communications;stochastic geometry;blockage2450|1712|0更新时间：2024-06-05
- 摘要：The newly developing low power wide area(LPWA) cellular data access requirements and challenges of Internet of Things is introduced,then the design principle and standardization progress of NB-IoT technologies are analyzed.At last,several typical NB-IoT applications are described.NB-IoT will be the most competent LWPA technology,since NB-IoT has five technical advantages:flexible deployment,wide coverage,low power consumption,low cost and massive connections.关键词：NB-IoT;IoT;LPWA;standard;application3495|2351|0更新时间：2024-06-05
- 摘要：Deep-coverage enhancement is one of the most important features of NB-IoT network,which allows NB-IoT network meets a large number of application scenarios.This thesis presents the research of NB-IoT deep-coverage enhancement principle,and the performance of two current mainstream network schemes are tested,verified and analyzed.关键词：NB-IoT;deep-coverage;network schemes1499|1829|0更新时间：2024-06-05
- 摘要：The oversaturated state of the intersection is mainly manifested as the queuing vehicles are not completely dissipated at the end of a green light phase.In order to cope with the traffic congestion,the mathematical model of an intersection is built.The relative regularity of arrival rate and departure rate of vehicles are analyzed.Through the analysis of the mechanism,the modeling of single-phase intersection,two-phase single intersection and four-phase single intersection are studied.The established oversaturated intersection delay model can be used to assign the green time of each intersection by calculating the minimum delay to alleviate the oversaturation condition of the city road.Numerical simulation results verify the validity and availability of the modeling method.关键词：urban traffic intersection;oversaturation;traffic delay;modeling863|1299|0更新时间：2024-06-05
- 摘要：With the decrease of the wireless utilization rate of GSM900 network at present,the rapid development of LTE services and the growing maturity of the IoT (Internet of Things) technology,in order to optimize the spectrum resources carrying efficiency,the GSM900 network will be used for other networks such as the IoT.How to carry out spectrum re-farming of GSM900 network based on intelligent automatic frequency optimization system (AFOS) and its practical application is studied.关键词：spectrum re-farming;AFOS;IoT;frequency planning1378|1188|0更新时间：2024-06-05
- 摘要：The popularization of broadband mobile communication technology has paved a way for the development of intelligent transportation industry.At the meantime,the intelligent transportation system (ITS) has also put forward higher requirements for the broadband mobile communication technologies.Based on the summary of the challenges faced by the broadband mobile communication technologies when applied to ITS,two typical expressway communication scenarios are selected in which the performance of wireless access technologies are evaluated and compared.It can provide theoretical reference for the development of ITS.关键词：intelligent transportation;freeway;LTE;WLAN1427|1455|0更新时间：2024-06-05
Theory and Technology
- 摘要：On the one hand,the Internet of Things brings new opportunities for operators.On the other hand,it also poses a serious challenge to the operators' networks.In order to solve the problem that the development of Internet of Things (IoT) matches the network construction,the business characteristics of cellular Internet of Things are sorted out through the collection of external information and internal research,and it builds a matching model between cellular Internet of Things business characteristics and network construction needs,which provides input for network construction.关键词：cellular Internet of Things;features of network services;model1246|1216|0更新时间：2024-06-05
- 摘要：The traditional circuit domain short message service is provided by SMSC (short message service center),and the business processes are carried in the seven signaling network.With the commercial use of IMS network,it is necessary for operators to continue to provide short message service for VoLTE users in the IP network,which is the function that operators must support in the process of network evolution.The IP-SM-GW functions,processes,system architecture,interface solutions and other issues are introduced,and IP-SM-GW into the current network is put forword.关键词：IP-SM-GW;short message service;IMS4231|2388|0更新时间：2024-06-05
- 摘要：The smart economic zone can be viewed as intelligent park platforms built by cloud computing,IoT and other advanced information technology,which is developing rapidly in various industries with the rapid development of domestic economy.Several key technologies,such as Internet of Things,cloud computing,SOA and security information are analyzed in terms of technical architecture firstly.And then focus on the smart economic zone overall construction planning scheme,technical structure selection and evolution route in order to provide a reference model for the industrial park’s wisdom.关键词：smart economic zone;IoT;cloud computing;SOA;information security2449|2405|0更新时间：2024-06-05
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