Mobile telephony

About: Mobile telephony is a research topic. Over the lifetime, 38008 publications have been published within this topic receiving 553646 citations.

A comprehensive automatic mobile radio telephone system

Abstract: This paper covers a mobile radiotelephone system designed to upgrade present day Land-Mobile services to provide facilities comparable to those obtainable within any national land-based automatic switching telephone system. It shows a system which may provide national coverage, requiring minimal cooperation from individual participating RCC's, by use of interactive base stations.

Development Platforms for Mobile Applications: Status and Trends

Abstract: Mobile devices are increasingly accepted as suitable media for multimedia-rich applications. Software firms have started promoting programming platforms and tools tailored to satisfy the requirements of mobile device users, developers, and resource constraints. This article reviews the main characteristics, relative merits, and shortcomings of the most popular development platform options - specifically, Java ME, .NET Compact Framework, Flash Lite, and Android. It evaluates and compares these options according to various quantitative and qualitative criteria. It aims to serve as a reference point and guide for developers and practitioners in choosing a mobile platform for development on information appliances.

GSM system engineering

Abstract: From the Publisher: Take a comprehensive look at the land-based infrastructure and networking of the global system for mobile communications with this practical guide. You'll see the complete picture — starting with an introduction to the rapidly growing industry of cellular radio, progressing to the development of the digital cellular radio system, and proceeding to a study of the fundamental issues, including the GSM architecture, protocols, and time and frequency domain representation of GSM. You'll find new, detailed information in the technical explanation of the hardware and software configurations and functions of the mobile switching center (MSC), base transceiver station (BTS), operations and maintenance center (OMC), and mobile station (MS) sub-systems. GSM System Engineering is the first book in the field to discuss and explore all aspects of the important engineering issues of: • Mobility management • Subscriber management • Security management • Network maintenance In addition to this complete overview of the system, you'll learn how to use the information yourself. You'll quickly master the basics of a typical advanced (second generation) cellular system and you'll find a detailed, practical example of an international time-division multiple access (TDMA) system, which will equip you with all the tools you need to perform system engineering on cellular TDMA systems. Through this study of GSM engineering, you'll start to understand why PCS is required, and what the future of the mobile telecommunications industry will hold. Indispensible for professional engineers working in TDMA systems, GSM System Engineering will alsobe a valuable reference for all engineers in mobile communications, for instructors of courses in TDMA systems and GSM, and for undergraduate and graduate students in cellular radio. Includes 200 illustrations and 400 equations.

Message transmission system for users of location-aware mobile communication devices in a local area network

Abstract: Embodiments of a location-based social network manager process are described. The process is executed on a server computer coupled to a plurality of mobile communication devices over a wireless network. Each mobile device is a location-aware mobile communication device. The process determines the geographic location of a mobile communication device operated by a user within an area, displays a map representation of the area around the mobile communication device on a graphical user interface of the mobile communication device, and superimposes on the map the respective locations of one or more other users of mobile communication devices coupled to the mobile communication device over the network. The process establishes communication links between the user and the plurality of acquaintances through respective location aware mobile communication devices through a network protocol. The user can create one or more groups of acquaintances based on one or more characteristics common to members of each group. The process facilitates the transmission of a user specified message or a pre-defined message to one or more acquaintances of the groups of acquaintances within a pre-defined distance to the user. The contents of the user specified message and pre-defined message is based on the characteristics of the group and the relative distance of the members to the user. The process can also be configured to automatically transmit a message to a user who is within a pre-defined distance to a point of interest within the displayed area.