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ZTE's CDMA 2000 1x Mobile Communication System
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作者 Xu Yong Hu Zhigang (Nanjing R&D Genter of ZTE Corporation,Nanjing 210012,China) 《ZTE Communications》 2003年第1期41-43,共3页
With the operation of the CUC(China Unicom CorporationLtd.)“New Horizon”CD-MA network, the Chinesemobile communication market hasentered a new stage of development.GSM and CDMA have joined handsto work fully and eff... With the operation of the CUC(China Unicom CorporationLtd.)“New Horizon”CD-MA network, the Chinesemobile communication market hasentered a new stage of development.GSM and CDMA have joined handsto work fully and efficiently. The to- 展开更多
关键词 CDMA CO of in HIGH ZTE’s CDMA 2000 1x mobile communication system HLR
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All-IP Based CDMA2000 1xEV-D0 Mobile Communication System
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作者 Wang Yiwen (CDMA Division of ZTE Corporation,Shenzhen 518004,China) 《ZTE Communications》 2004年第2期30-32,共3页
CDMA2000 1×EV-DO is an advancedtechnology optimized for high ratewireless data services that arecharacterized by burstness, high speed,asymmetric uplink and downlink data rateand insensitiveness to time delay. It... CDMA2000 1×EV-DO is an advancedtechnology optimized for high ratewireless data services that arecharacterized by burstness, high speed,asymmetric uplink and downlink data rateand insensitiveness to time delay. It has thefollowing advantages:(1)Data OptimizationCDMA2000 1×EV-DO, a data-optimizedversion of CDMA2000, delivers a forward peakdata rate of up to 2.4576 Mb/s within a 1.25 MHz 展开更多
关键词 CDMA EV DO IX All-IP Based CDMA2000 1xEV-D0 mobile communication system BTS IP
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A Power Line-delivered and Lamp-based Broadband Mobile Communication System
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作者 Tang Youxi Shao Shihai (National key Lab of Communications,UESTC,Chengdu 610054,China) 《ZTE Communications》 2007年第3期28-31,共4页
A new mobile communications network architecture is proposed to solve four existing bottlenecks that restrict the rapid development of mobile communications,as well as to meet the development demands of future broadba... A new mobile communications network architecture is proposed to solve four existing bottlenecks that restrict the rapid development of mobile communications,as well as to meet the development demands of future broadband mobile communications. The architecture introduces the Information Lamp (IL),a novel device carrying out transceiver function,as the access point,besides providing light. It fulfills information interaction between the access points and radio access network through the power line (or fiber). The new system,supported by core technologies such as multi-antenna based distributed space-time signal processing and distributed radio resource management,integrates the wired and wireless networks to provide high-speed and high-quality mobile communication services. 展开更多
关键词 MIMO LINE A Power Line-delivered and Lamp-based Broadband mobile communication system ACCESS
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Analysis of reflected signal of quad rotor UAV based on model fitting in mobile communication system 被引量:2
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作者 LI Xiaohui FANG Cong FAN Tao 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2022年第1期97-104,共8页
In view of the many scenes of unmanned aerial vehicle(UAV)detection,a third-party signal source is used to design a receiver to monitor the UAV.It is of great significance to understand the reflection of the signal il... In view of the many scenes of unmanned aerial vehicle(UAV)detection,a third-party signal source is used to design a receiver to monitor the UAV.It is of great significance to understand the reflection of the signal illuminating the UAV.Taking the communication base station(BS)signal as the third-party signal source,and considering the complete transmission link,reflection changes and loss fading of the communication signal,this study conducts model fitting for irregular UAV targets,simplifying complex targets into a combination of simple targets.Furthermore,the influence of the dielectric constant of the target surface and the signal irradiation angle on the signal reflection is analyzed.The analysis shows that the simulation results of this model fitting method are consistent with the results of other literature,which provides theoretical support for the detection of low and slow small targets such as UAVs. 展开更多
关键词 mobile communication signal quad rotor unmanned aerial vehicle(UAV) signal reflection model fitting
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Study of Communication Protocol and Link Establishing Mode of Mine Managing Mobile Communication System of Minute Areas
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作者 杨维 孙继平 苏又平 《International Journal of Mining Science and Technology》 2000年第2期79-82,共4页
This paper studies the communication protocol and link establishing mode of the mine managing mobile communication system consisted of minute areas. The communication protocol suitable for the system is proposed and d... This paper studies the communication protocol and link establishing mode of the mine managing mobile communication system consisted of minute areas. The communication protocol suitable for the system is proposed and designed. 展开更多
关键词 MINE mobile communication communication protocol LAYER LINK
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Optimizing Spatial Crowdsourcing:A Quality-Aware Task Assignment Approach for Mobile Communication
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作者 Jiali Weng Xike Xie 《Journal of Electronic Research and Application》 2024年第3期104-111,共8页
The widespread use of advanced electronic devices has led to the emergence of spatial crowdsourcing,a method that taps into collective efforts to perform real-world tasks like environmental monitoring and traffic surv... The widespread use of advanced electronic devices has led to the emergence of spatial crowdsourcing,a method that taps into collective efforts to perform real-world tasks like environmental monitoring and traffic surveillance.Our research focuses on a specific type of spatial crowdsourcing that involves ongoing,collaborative efforts for continuous spatial data acquisition.However,due to limited budgets and workforce availability,the collected data often lacks completeness,posing a data deficiency problem.To address this,we propose a reciprocal framework to optimize task assignments by leveraging the mutual benefits of spatiotemporal subtask execution.We introduce an entropy-based quality metric to capture the combined effects of incomplete data acquisition and interpolation imprecision.Building on this,we explore a quality-aware task assignment method,corresponding to spatiotemporal assignment strategies.Since the assignment problem is NP-hard,we develop a polynomial-time algorithm with the guaranteed approximation ratio.Novel indexing and pruning techniques are proposed to further enhance performance.Extensive experiments conducted on datasets validate the effectiveness of our methods. 展开更多
关键词 Spatiotemporal crowdsourcing mobile communication Task quality
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Locating Global System for Mobile Communication(GSM)Base Stations Using Geographic Information System(GIS)
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作者 Bamidele Moses Kuboye Victor Gbenga Abiodun 《Journal of Geographical Research》 2023年第4期1-10,共10页
The global system for mobile communication(GSM)is planned to meet the needs of the whole subscribers.The number of subscribers increased as the population increased due to the acceptance of GSM services by the subscri... The global system for mobile communication(GSM)is planned to meet the needs of the whole subscribers.The number of subscribers increased as the population increased due to the acceptance of GSM services by the subscribers.Thus,there should be a way to monitor base stations that will meet the increasing demand of subscribers in any area as a population surge will lead to more subscriptions.This will allow GSM network operators to serve their subscribers better and ease network congestion.This work presents a review of mobile evolution from the first generation to the fifth generation.A review of global positioning system(GPS)technology and its applications to geographic information systems(GIS)was done.The coordinates of these base stations were taken using a GPS device.These base station coordinates were then exported to QGIS for the design of the map.Thereafter,the output map was then integrated into the website.The discussions on the results followed and some useful suggestions given will go a long way to help the operators of GSM in Nigeria and in general.If the propositions given are adhered to,it will go a long way to help the operators reduce congestion on their network and thereby increase the satisfaction of the subscribers. 展开更多
关键词 Global system for mobile communication(GSM) Global positioning system(GPS) Geographic information system(GIS) Subscriber MAP IMAGES
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Key Distribution Protocols for Mobile Communication Systems
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作者 Zhan Banghua and Hu Zhengming (Department of Information Engineering Beijing University of Posts and Telecommunications, Beijing, 100876, P. R. China) 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 1998年第2期6-9,共4页
In this paper we propose a new key distribution protocol for mobile communication systems.This protocol KDP4, like KDP3 in [3], is still secure against Simmons' replay attack and the new attack in [3] without us... In this paper we propose a new key distribution protocol for mobile communication systems.This protocol KDP4, like KDP3 in [3], is still secure against Simmons' replay attack and the new attack in [3] without using timestamps. It is a secure, efficient and practical key distribution protocol for mobile communication systems. 展开更多
关键词 key distribution protocols mobile communication systems CRYPTOLOGY
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System Integration of Terrestrial Mobile Communication and Satellite Communication——The Trends, Challenges and Key Technologies in B5G and 6G 被引量:69
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作者 Shanzhi Chen Shaohui Sun Shaoli Kang 《China Communications》 SCIE CSCD 2020年第12期156-171,共16页
Mobile communication standards have been developed into a new era of B5G and 6G.In recent years,low earth orbit(LEO)satellites and space Internet have become hot topics.The integrated satellite and terrestrial systems... Mobile communication standards have been developed into a new era of B5G and 6G.In recent years,low earth orbit(LEO)satellites and space Internet have become hot topics.The integrated satellite and terrestrial systems have been widely discussed by industries and academics,and even are expected to be applied in those huge constellations in construction.This paper points out the trends of two stages towards system integration of the terrestrial mobile communication and the satellite communications:to be compatible with 5G,and to be integrated within 6G.Based on analysis of the challenges of both stages,key technologies are thereafter analyzed in detail,covering both air interface currently discussed in 3GPP for B5G and also novel network architecture and related transmission technologies toward future 6G. 展开更多
关键词 satellite communication terrestrial mobile communication system integration B5G 6G space internet
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Predictive Tracking Implementation for Mobile Communication Using Programmable Metasurface
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作者 Yueheng Li Sven Bettinga +6 位作者 Lucas Giroto de Oliveira Mohamad Basim Alabd Joerg Eisenbeis Xiang Wan Xueyun Long Tiejun Cui Thomas Zwick 《China Communications》 SCIE CSCD 2023年第8期137-152,共16页
The programmable metasurface(PM)is an antenna array architecture that realizes flexible beam steering.This functionality is achieved by controlling the unit cells designed with micro components such as positive-intrin... The programmable metasurface(PM)is an antenna array architecture that realizes flexible beam steering.This functionality is achieved by controlling the unit cells designed with micro components such as positive-intrinsic-negative(PIN)diodes,which offers potential cost reductions in the next generation wireless communication systems.Although PM has been a popular topic in antenna design,its implementations in real-time systems accompanied by signal processing algorithms are challenging.In this paper,novel predictive tracking algorithms for mobile communication scenarios using a PM are created and implemented in a real-time system operating at 28 GHz.An angular speed prediction(ASP)algorithm is proposed to compute the position of user equipment(UE)based on the previously recorded beam directions.As another solution,an angle correction(AC)algorithm is proposed to further improve the prediction and tracking accuracy.As a benchmark,the comparisons to a previous PM tracking algorithm without prediction are presented.Both simulation and measurement results show that the prediction algorithms successfully improve the tracking performance,which also prove the feasibilities of PM-based systems to solve complex real-time signal processing problems. 展开更多
关键词 signal processing mobile communication antenna arrays
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Adaptive Resource Allocation Algorithm for 5G Vehicular Cloud Communication
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作者 Huanhuan Li Hongchang Wei +1 位作者 Zheliang Chen Yue Xu 《Computers, Materials & Continua》 SCIE EI 2024年第8期2199-2219,共21页
The current resource allocation in 5G vehicular networks for mobile cloud communication faces several challenges,such as low user utilization,unbalanced resource allocation,and extended adaptive allocation time.We pro... The current resource allocation in 5G vehicular networks for mobile cloud communication faces several challenges,such as low user utilization,unbalanced resource allocation,and extended adaptive allocation time.We propose an adaptive allocation algorithm for mobile cloud communication resources in 5G vehicular networks to address these issues.This study analyzes the components of the 5G vehicular network architecture to determine the performance of different components.It is ascertained that the communication modes in 5G vehicular networks for mobile cloud communication include in-band and out-of-band modes.Furthermore,this study analyzes the single-hop and multi-hop modes in mobile cloud communication and calculates the resource transmission rate and bandwidth in different communication modes.The study also determines the scenario of one-way and two-way vehicle lane cloud communication network connectivity,calculates the probability of vehicle network connectivity under different mobile cloud communication radii,and determines the amount of cloud communication resources required by vehicles in different lane scenarios.Based on the communication status of users in 5G vehicular networks,this study calculates the bandwidth and transmission rate of the allocated channels using Shannon’s formula.It determines the adaptive allocation of cloud communication resources,introduces an objective function to obtain the optimal solution after allocation,and completes the adaptive allocation process.The experimental results demonstrate that,with the application of the proposed method,the maximum utilization of user communication resources reaches approximately 99%.The balance coefficient curve approaches 1,and the allocation time remains under 2 s.This indicates that the proposed method has higher adaptive allocation efficiency. 展开更多
关键词 5G vehicular networks mobile cloud communication resource allocation channel capacity network connectivity communication radius objective function
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A Real-time EMF Measuring System for Mobile Communication Towers in Sri Lanka 被引量:1
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作者 Lakshitha Rangana WICKRAMASINGHE Sisaara PERERA 《Instrumentation》 2021年第2期22-33,共12页
Telecommunications Regulatory Commission of Sri Lanka is the governing body which is responsible for the frequency allocation and monitoring the unauthorized Electromagnetic frequency(EMF)signal transmitting violation... Telecommunications Regulatory Commission of Sri Lanka is the governing body which is responsible for the frequency allocation and monitoring the unauthorized Electromagnetic frequency(EMF)signal transmitting violations.However,in Sri Lanka,currently there is not any proper mechanism to monitor the radiation hazard level and its impact to the people living in the vicinity of mobile communication towers.There are approximately 7000 mobile transmitting towers in Sri Lanka to date and the used frequency range lies between 900 MHz to 3 GHz for mobile communication.Over the last few decades,many of the health hazard conditions were reported due to the radiation of those harmful EMFs.To cater this problem,a portable real time EMF signal strength measuring system with a radiation hazard level indicator was developed to monitor the EMF level and its impact.The proposed system operates with three intermediate frequency bands(i.e.900 MHz,1800 MHz and 2400 MHz)and it’s capable of measuring the power density and the radiation hazard level at that particular point which is being measured.Moreover,the corresponding radiation hazard level is indicated with reference to the standard power density levels published by the International Commission on Non-Ionizing Radiation Protection(ICNIRP^(*)).The system works with the overall accuracy of 88%in terms of identifying the power densities and its corresponding radiation hazard levels. 展开更多
关键词 Electromagnetic Frequency(EMF) mobile communication Power Density Radiation Hazard
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Adaptive robust control of mobile satellite communication system with disturbance and model uncertainties
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作者 Jun Jiang Jian Guo +1 位作者 Bin Yao Qingwei Chen 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2012年第5期761-767,共7页
The tracking and stable control of a typical shipmounted mobile satellite communication system(MSCS) is studied.Unlike the former studies based on simplified single-axis models,a tri-axis nonlinear model including t... The tracking and stable control of a typical shipmounted mobile satellite communication system(MSCS) is studied.Unlike the former studies based on simplified single-axis models,a tri-axis nonlinear model including the kinematic and dynamic features of the MSCS is used as the control object.An adaptive robust controller with trajectory planning is designed to deal with large parametric uncertainties and uncertain nonlinearities of the system.A theoretic performance result is given and proved.The designed adaptive robust controller and other two traditional controllers are tested in the comparative simulations under three different situations.The simulation results show the tracking and stable validity of the proposed controller. 展开更多
关键词 ship-mounted mobile satellite communication system adaptive control robust control tracking control
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Research Framework of B3G Mobile Communications Systems
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作者 Chen Ming, You Xiaohu (National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China) 《ZTE Communications》 2006年第2期29-34,共6页
Compared with the services in 3G, services in Beyond 3G (B3G) have some distinctive characteristics such as the packet data services being the majority, more service types, larger scale of services, higher peak transm... Compared with the services in 3G, services in Beyond 3G (B3G) have some distinctive characteristics such as the packet data services being the majority, more service types, larger scale of services, higher peak transmission rate, enlarged range of transmission rates, more spatial and temporal distribution differences, and more service transmission requests occurring in fast moving vehicles. In order to meet the requirements of B3G services, the B3G systems must have great improvement in network architecture, air interface scheme, radio resource allocation strategy, frequency bands, and Radio Frequency (RF) technology etc. Therefore, the research of the B3G systems should focus on the theory of generalized cellular communications networks, theory of the Multiple Input Multiple Output (MIMO) wireless transmission system, matching of radio resources to new-type air interfaces, new iterative detection and adaptive link methods, and new-type antenna and RF technologies. 展开更多
关键词 MIMO IEEE USA Research Framework of B3G mobile communications systems
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Cooperative Communication Protocols for Performance Improvement in Mobile Satellite Systems
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作者 Ashagrie Getnet Flattie 《ZTE Communications》 2013年第4期47-52,共6页
A mobile satellite indoor signal is proposed to model perfor mance of cooperative communication protocols and maximal ra tio combining.Cooperative diversity can improve the reliability of satellite system and increase... A mobile satellite indoor signal is proposed to model perfor mance of cooperative communication protocols and maximal ra tio combining.Cooperative diversity can improve the reliability of satellite system and increase data speed or expand cell radi us by lessening the effects of fading.Performance is determined by measured bit error rates(BERs)in different types of coopera tive protocols and indoor systems(e.g.GSM and WCDMA net works).The effect of performance on cooperative terminals lo cated at different distances from an indoor cellular system is al so discussed.The proposed schemes provide higher signal-tonoise ratio(SNR)-around 1.6 dB and 2.6 dB gap at BER 10-2for amplify-and-forward(AF)and decode-and-forward(DF)cooperative protocols,respectively,when the cooperative termi nal is located 10 m from the WCDMA indoor system.Coopera tive protocols improve effective power utilization and,hence,improve performance and cell coverage of the mobile satellite network. 展开更多
关键词 cooperative communication amplify-and-forward mobile satellite system signal-to-noise ratio maximal ratio combining
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Mobile Edge Communications, Computing, and Caching(MEC3) Technology in the Maritime Communication Network 被引量:17
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作者 Jie Zeng Jiaying Sun +1 位作者 Binwei Wu Xin Su 《China Communications》 SCIE CSCD 2020年第5期223-234,共12页
With the increasing maritime activities and the rapidly developing maritime economy, the fifth-generation(5G) mobile communication system is expected to be deployed at the ocean. New technologies need to be explored t... With the increasing maritime activities and the rapidly developing maritime economy, the fifth-generation(5G) mobile communication system is expected to be deployed at the ocean. New technologies need to be explored to meet the requirements of ultra-reliable and low latency communications(URLLC) in the maritime communication network(MCN). Mobile edge computing(MEC) can achieve high energy efficiency in MCN at the cost of suffering from high control plane latency and low reliability. In terms of this issue, the mobile edge communications, computing, and caching(MEC3) technology is proposed to sink mobile computing, network control, and storage to the edge of the network. New methods that enable resource-efficient configurations and reduce redundant data transmissions can enable the reliable implementation of computing-intension and latency-sensitive applications. The key technologies of MEC3 to enable URLLC are analyzed and optimized in MCN. The best response-based offloading algorithm(BROA) is adopted to optimize task offloading. The simulation results show that the task latency can be decreased by 26.5’ ms, and the energy consumption in terminal users can be reduced to 66.6%. 展开更多
关键词 best response-based offloading algorithm(BROA) energy consumption mobile edge computing(MEC) mobile edge communications computing and caching(MEC3) task offloading
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ENERGY-EFFICIENT MICROWAVE COMPONENTS FOR MOBILE COMMUNICATION 被引量:2
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作者 Yuanan Liu Quanyuan Feng Fadhel M. Ghannouchi 《China Communications》 SCIE CSCD 2017年第2期19-20,共2页
In the coexisted world of 3G,4G,5G and many other specialized wireless communication systems,billions of connections could be existing for various information transmission types.Unluckily,data show that the increase o... In the coexisted world of 3G,4G,5G and many other specialized wireless communication systems,billions of connections could be existing for various information transmission types.Unluckily,data show that the increase of network capacity is heavily more than the increase of the network energy efficiency in recent years,which could lead to more energy consumption per transmitted bit in the future network.As basic units in mobile communication systems,microwave/RF components and modules play key roles 展开更多
关键词 HIGH data ENERGY-EFFICIENT MICROWAVE COMPONENTS FOR mobile communication PAPR SHOW DPA
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Simulation of Radio Path Strength for Multipath Propagation in Land Mobile Communications 被引量:2
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作者 Gao Shichang (Shanghai University)Li Jun (Nanjing University) Jiang Changyin (China Research Institute of Radiowave Propagation) Zhong Shunshi (Shanghai University) 《Advances in Manufacturing》 SCIE CAS 1998年第4期17-20,共4页
Based on the characteristics of the radio propagation in land mobile communications environment, a theoretical model for the reflecting(scattering) number of each radio path is derived firstly. This model can be used ... Based on the characteristics of the radio propagation in land mobile communications environment, a theoretical model for the reflecting(scattering) number of each radio path is derived firstly. This model can be used to predict the variation of radio path strength, which is important for practical mobile communications engineering. Using this model, a method for simulating radio path strength is developed, with numerical results presented. 展开更多
关键词 radio propagation path strength land mobile communications
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5G Green Mobile Communication Networks 被引量:6
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作者 Guoqiang Mao 《China Communications》 SCIE CSCD 2017年第2期183-184,共2页
With the popularization of wireless multimedia communications,the wireless traffic is predicated to be increased more than 1000time in the next decade.Some new technologies,e.g.,massive multi.input multi.output antenn... With the popularization of wireless multimedia communications,the wireless traffic is predicated to be increased more than 1000time in the next decade.Some new technologies,e.g.,massive multi.input multi.output antennas,millimeter wave and small 展开更多
关键词 Green mobile communication Networks
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A Novel 28 GHz Phased Array Antenna for 5G Mobile Communications 被引量:1
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作者 LI Yezhen REN Yongli +2 位作者 YANG Fan XU Shenheng ZHANG Jiannian 《ZTE Communications》 2020年第3期20-25,共6页
A novel phased array antenna consisting of 256 elements is presented and experimentally verified for 5G millimeter-wave wireless communications.The antenna integrated with a wave control circuit can perform real-time ... A novel phased array antenna consisting of 256 elements is presented and experimentally verified for 5G millimeter-wave wireless communications.The antenna integrated with a wave control circuit can perform real-time beam scanning by reconfiguring the phase of an antenna unit.The unit,designed at 28 GHz using a simple patch structure with one PIN diode,can be electronically controlled to generate 1 bit phase quantization.A prototype of the antenna is fabricated and measured to demonstrate the feasibility of this approach.The measurement results indicate that the antenna achieves high gain and fast beam-steering,with the scan beams within±60°range and the maximum gain up to 21.7 dBi.Furthermore,it is also tested for wireless video transmission.In ZTE Shanghai,the antenna was used for the 5G New Radio(NR)test.The error vector magnitude(EVM)is less than 3%and the adjacent channel leakage ratio(ACLR)less than−35 dBc,which can meet 5G system requirements.Compared with the conventional phased array antenna,the proposed phased array has the advantages of low power consumption,low cost and conformal geometry.Due to these characteristics,the antenna is promising for wide applications in 5G millimeter-wave communication systems. 展开更多
关键词 5G mobile communications millimeter wave phased array antenna
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