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
This work is concerned with GSM subscription fraud detection system using some network techniques. Fraud is a hitch around the globe with huge loss of income. Fraud has an effect on the credibility and performance of ...This work is concerned with GSM subscription fraud detection system using some network techniques. Fraud is a hitch around the globe with huge loss of income. Fraud has an effect on the credibility and performance of telecommunication companies. The most difficult problem that faces the industry is the fact that fraud is dynamic, which means that whenever fraudsters feel that they will be detected, they devise other ways to circumvent security measures. In such cases, the perpetrators’ intention is to completely avoid or at least reduce the charges for using the services. Subscription fraud is one of the major types of telecommunication fraud in which a customer obtains an account without intention to pay the bill. Thus at the level of a phone number, all transactions from the number will be fraudulent. In such cases abnormal usage occurs throughout the active period of the account;which is usually used for call selling or intensive self usage. This provides a means for illegal high profit business for fraudsters requiring minimal investment and relatively low risk of getting caught. A system to prevent subscription fraud in GSM telecommunications with high impact on long distance carriers is proposed to detect fraud. The system employs adaptive flexible techniques using advanced data analysis like Artificial Neural Networks (ANN). This study aims at developing a fraud detection model occurrence in GSM Network. The paper also gives analysis of the fraud detection Systems, fraud detection and prevention, fraud prevention methods etc. Fraud affects us all and is of particular concern to those who manage large government and business organisations where the potential losses are greatest. The operation of a mobile network is complex, and fraudsters invest a lot of energy to find and exploit every weakness of the system. A typical example would be subscription fraud, where a fraudster acquires a subscription to the mobile network under a false identity;and start reselling the use of his phone to unscrupulous customers (typically for international calls to distant foreign countries) at rate less than the regular tariff.展开更多
目前,国内高速铁路使用基于全球铁路移动通信系统(Global System for Mobile Communications-Railway,GSM-R)的双向无线通信系统,实现列车与地面之间的安全信息传输。然而,无线通信存在传输延迟和丢包,严重时会影响运行效率,因此需要研...目前,国内高速铁路使用基于全球铁路移动通信系统(Global System for Mobile Communications-Railway,GSM-R)的双向无线通信系统,实现列车与地面之间的安全信息传输。然而,无线通信存在传输延迟和丢包,严重时会影响运行效率,因此需要研究GSM-R系统服务质量(Quality of Service,QoS)参数,以满足实时性和可用性需求。选取传输延时作为待优化的GSM-R无线通信系统QoS参数,定量分析端到端传输延迟时间,提出基于无线传输参数自适应的加强学习优化方案。仿真结果表明,该方法可以显著提升无线通信系统性能。展开更多
This paper has discussed the home and abroad’s current situation of temperature monitoring system and compared the advantages and disadvantages of several common methods.According to cold storage,container, medicines...This paper has discussed the home and abroad’s current situation of temperature monitoring system and compared the advantages and disadvantages of several common methods.According to cold storage,container, medicines library and greenhouse’s requirements on temperature,this thesis has analyzed the advantages and significance of the system and elaborated each module’s function and implementation based on hardware and software’s introduction and demonstrated the pictures of its practical application and the alarm information saved in the SD card which extracted from the database.展开更多
The purpose of this paper is to build a secured and reliable vehicle anti-theft system which will have the ability to access the vehicle subsystems from a remote location where there is GSM network. And also, the desi...The purpose of this paper is to build a secured and reliable vehicle anti-theft system which will have the ability to access the vehicle subsystems from a remote location where there is GSM network. And also, the design method involves the interfacing of GSM/GPRS modem module with the vehicle ignition subsystem, and the test result shows that it performs some control actions on the vehicle subsystems from a mobile phone, having taken the advantage of the wide coverage area of some GSM networks. Hence the topic is “Remotely Controlled Vehicle Anti-theft System via GSM Network”.展开更多
Aiming at the actual demand for monitoring environmental information,a wireless sensing system for temperature and relative humidity(RH)monitoring based on radio frequency(RF)technology and mobile network was designed...Aiming at the actual demand for monitoring environmental information,a wireless sensing system for temperature and relative humidity(RH)monitoring based on radio frequency(RF)technology and mobile network was designed.This paper introduces the architecture of the system.The system uses AVR micro controller unit(MCU),KYL-1020U RF module and SHT71 to complete real-time temperature and humidity monitoring,and uses SIM900A module to realize remote alarming and monitoring with short message system(SMS)through global system for mobile communication(GSM).Experimental results show that the designed system has good stability of measurement and real-time performance,and it can be used in some small temperature and humidity monitoring occasions.展开更多
The unequal error protection （UEP） is applied in distributed speech recognition （DSR） system and three schemes are proposed. All of these three schemes are evaluated on the GSM simulating platform for recognizing ...The unequal error protection （UEP） is applied in distributed speech recognition （DSR） system and three schemes are proposed. All of these three schemes are evaluated on the GSM simulating platform for recognizing mandarin digit strings and compared with the equal error protection （EEP） scheme. Experiments show that UEP can protect the data transmitted in DSR system more effectively, which results in a higher word accurate rate of DSR system.展开更多
在对全球移动通信系统(Global System for Mobile Communications,GSM)的应用特点及技术原理进行简要探讨的基础上,围绕总体设计、单元设计和软硬件设计3个方面,研究基于GSM模块的电子信息自动化处理系统的设计策略,并对系统功能的应用...在对全球移动通信系统(Global System for Mobile Communications,GSM)的应用特点及技术原理进行简要探讨的基础上,围绕总体设计、单元设计和软硬件设计3个方面,研究基于GSM模块的电子信息自动化处理系统的设计策略,并对系统功能的应用进行分析,指出系统运行的要点。展开更多
The article briefly introduces the situation of the global mobile communications market,and based on the development status quo of China's mobile communications market,studies the strategy for China Telecom to ent...The article briefly introduces the situation of the global mobile communications market,and based on the development status quo of China's mobile communications market,studies the strategy for China Telecom to enter the mobile market,mainly focusing on mo- bile technologies selection,differentiable services,regional strate- gies and price policies.展开更多
铁路在陆地运输系统中占有举足轻重的位置,我国的铁路网从原来的“追随”阶段走向“领跑”阶段。铁路系统全面更新,包括铁路基础设施、通信系统以及电力系统等。铁路通信设计的综合专用数字移动通信(Global System for Mobile Communica...铁路在陆地运输系统中占有举足轻重的位置,我国的铁路网从原来的“追随”阶段走向“领跑”阶段。铁路系统全面更新,包括铁路基础设施、通信系统以及电力系统等。铁路通信设计的综合专用数字移动通信(Global System for Mobile Communications–Railway,GSM-R)技术是一种新型的列车通信技术,它既可以提高铁路的通信品质,又可以为列车提供可靠的数据传输服务。通过对GSM-R技术特性的剖析,对该技术在铁路交通中的运用进行了详细的分析和论述。展开更多
目的基于现代化信息技术监控、调度车辆,实现对车辆的动态管理.防止和减少交通事故,提高交通运输管理能力。方法通过集成使用GIS(geographic information system,地理信息系统)、GPS(global positioning system,全球定位系统)、GSM(glob...目的基于现代化信息技术监控、调度车辆,实现对车辆的动态管理.防止和减少交通事故,提高交通运输管理能力。方法通过集成使用GIS(geographic information system,地理信息系统)、GPS(global positioning system,全球定位系统)、GSM(global system for mobile communications,全球移动通信系统)、GPRS(general packet radio service,通用无线分组业务)、中间件等技术,并按图属一体化、多尺度数据无缝集成的建库思想,完成了系统设计的数据建库、无线网络设置、道路匹配和信息显示等关键技术问题。结果实现了对多种车辆目标的实时跟踪和动态管理。结论综合使用GIS,GPS,GSM/GPRS等信息技术,建立车辆动态监控系统,是现代交通运输发展的必然趋势。展开更多
文摘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.
文摘This work is concerned with GSM subscription fraud detection system using some network techniques. Fraud is a hitch around the globe with huge loss of income. Fraud has an effect on the credibility and performance of telecommunication companies. The most difficult problem that faces the industry is the fact that fraud is dynamic, which means that whenever fraudsters feel that they will be detected, they devise other ways to circumvent security measures. In such cases, the perpetrators’ intention is to completely avoid or at least reduce the charges for using the services. Subscription fraud is one of the major types of telecommunication fraud in which a customer obtains an account without intention to pay the bill. Thus at the level of a phone number, all transactions from the number will be fraudulent. In such cases abnormal usage occurs throughout the active period of the account;which is usually used for call selling or intensive self usage. This provides a means for illegal high profit business for fraudsters requiring minimal investment and relatively low risk of getting caught. A system to prevent subscription fraud in GSM telecommunications with high impact on long distance carriers is proposed to detect fraud. The system employs adaptive flexible techniques using advanced data analysis like Artificial Neural Networks (ANN). This study aims at developing a fraud detection model occurrence in GSM Network. The paper also gives analysis of the fraud detection Systems, fraud detection and prevention, fraud prevention methods etc. Fraud affects us all and is of particular concern to those who manage large government and business organisations where the potential losses are greatest. The operation of a mobile network is complex, and fraudsters invest a lot of energy to find and exploit every weakness of the system. A typical example would be subscription fraud, where a fraudster acquires a subscription to the mobile network under a false identity;and start reselling the use of his phone to unscrupulous customers (typically for international calls to distant foreign countries) at rate less than the regular tariff.
文摘目前,国内高速铁路使用基于全球铁路移动通信系统(Global System for Mobile Communications-Railway,GSM-R)的双向无线通信系统,实现列车与地面之间的安全信息传输。然而,无线通信存在传输延迟和丢包,严重时会影响运行效率,因此需要研究GSM-R系统服务质量(Quality of Service,QoS)参数,以满足实时性和可用性需求。选取传输延时作为待优化的GSM-R无线通信系统QoS参数,定量分析端到端传输延迟时间,提出基于无线传输参数自适应的加强学习优化方案。仿真结果表明,该方法可以显著提升无线通信系统性能。
文摘This paper has discussed the home and abroad’s current situation of temperature monitoring system and compared the advantages and disadvantages of several common methods.According to cold storage,container, medicines library and greenhouse’s requirements on temperature,this thesis has analyzed the advantages and significance of the system and elaborated each module’s function and implementation based on hardware and software’s introduction and demonstrated the pictures of its practical application and the alarm information saved in the SD card which extracted from the database.
文摘The purpose of this paper is to build a secured and reliable vehicle anti-theft system which will have the ability to access the vehicle subsystems from a remote location where there is GSM network. And also, the design method involves the interfacing of GSM/GPRS modem module with the vehicle ignition subsystem, and the test result shows that it performs some control actions on the vehicle subsystems from a mobile phone, having taken the advantage of the wide coverage area of some GSM networks. Hence the topic is “Remotely Controlled Vehicle Anti-theft System via GSM Network”.
文摘Aiming at the actual demand for monitoring environmental information,a wireless sensing system for temperature and relative humidity(RH)monitoring based on radio frequency(RF)technology and mobile network was designed.This paper introduces the architecture of the system.The system uses AVR micro controller unit(MCU),KYL-1020U RF module and SHT71 to complete real-time temperature and humidity monitoring,and uses SIM900A module to realize remote alarming and monitoring with short message system(SMS)through global system for mobile communication(GSM).Experimental results show that the designed system has good stability of measurement and real-time performance,and it can be used in some small temperature and humidity monitoring occasions.
基金Sponsored bythe National Natural Science Foundation of China (60372089) the Basic Research Foundation of Beijing Institute of Technology(BIT-UBF-200301F03)
文摘The unequal error protection （UEP） is applied in distributed speech recognition （DSR） system and three schemes are proposed. All of these three schemes are evaluated on the GSM simulating platform for recognizing mandarin digit strings and compared with the equal error protection （EEP） scheme. Experiments show that UEP can protect the data transmitted in DSR system more effectively, which results in a higher word accurate rate of DSR system.
文摘在对全球移动通信系统(Global System for Mobile Communications,GSM)的应用特点及技术原理进行简要探讨的基础上,围绕总体设计、单元设计和软硬件设计3个方面,研究基于GSM模块的电子信息自动化处理系统的设计策略,并对系统功能的应用进行分析,指出系统运行的要点。
文摘The article briefly introduces the situation of the global mobile communications market,and based on the development status quo of China's mobile communications market,studies the strategy for China Telecom to enter the mobile market,mainly focusing on mo- bile technologies selection,differentiable services,regional strate- gies and price policies.
文摘铁路在陆地运输系统中占有举足轻重的位置,我国的铁路网从原来的“追随”阶段走向“领跑”阶段。铁路系统全面更新,包括铁路基础设施、通信系统以及电力系统等。铁路通信设计的综合专用数字移动通信(Global System for Mobile Communications–Railway,GSM-R)技术是一种新型的列车通信技术,它既可以提高铁路的通信品质,又可以为列车提供可靠的数据传输服务。通过对GSM-R技术特性的剖析,对该技术在铁路交通中的运用进行了详细的分析和论述。
文摘目的基于现代化信息技术监控、调度车辆,实现对车辆的动态管理.防止和减少交通事故,提高交通运输管理能力。方法通过集成使用GIS(geographic information system,地理信息系统)、GPS(global positioning system,全球定位系统)、GSM(global system for mobile communications,全球移动通信系统)、GPRS(general packet radio service,通用无线分组业务)、中间件等技术,并按图属一体化、多尺度数据无缝集成的建库思想,完成了系统设计的数据建库、无线网络设置、道路匹配和信息显示等关键技术问题。结果实现了对多种车辆目标的实时跟踪和动态管理。结论综合使用GIS,GPS,GSM/GPRS等信息技术,建立车辆动态监控系统,是现代交通运输发展的必然趋势。
