Design and Implementation of Remotely Controlled Vehicle Anti-Theft System via GSM Network

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”.

GoTa Digital Trunking System and It's Location Service

1 GoTa System Features andLocation Service1.1 GoTaGoTa, the abbreviation of“Global OpenTrunking Architecture”, is anew-generation digital trunkingcommunication system based on theCDMA2000 1x technology. It makes use of manyadvantages of the CDMA technology and makesimprovement and optimization for the digitaltrunking communication system. It cansimultaneously realize multipte services including

中国联通上海分公司电信业务的发展

本文介绍了中国联通上海分公司的业务发展现状，今后的发展展望。

UMTS互通场景中的QoS研究

UMTS将为未来的信息系统提供业务平台,整个通信界都支持这一发展趋势。技术将不再被看作是问题,而是被看作是业务创新、业务多样化和业务区分的驱动力,UMTS将代表当前大多数移动网络基础设施自然演进的趋势。本文首先给出了控制平面和用户平面QoS管理功能,然后分析了UMTS与GSMCS、UMTS与GSMGPRS互通时的服务质量。