Xem 1-20 trên 546 kết quả Mobile systems
  • The growth of the Internet, which I have been involved in, and the growth of mobile telephone services, which NTT DoCoMo has been a leader in, have been peculiarly interlinked and at the same time separate. The Internet is a lab experiment that broke free, and finds itself in a world of its own contriving, which it often does not understand. The mobile telephone world was developed for commercial purposes, and is in many respects the son of its father, the wired telephone system.

    pdf406p dieutan 17-05-2010 122 66   Download

  • The importance of mobile systems programming has emerged over the recent years as a new domain in software development. The design of software that runs in a mobile device requires that developers combine the rules applicable in embedded environment; memory-awareness, limited performance, security, and limited resources with features that are needed in workstation environment; modifiability, run-time extensions, and rapid application development. Programming Mobile Devices is a comprehensive, practical introduction to programming mobile systems.

    pdf247p transang5 23-11-2012 46 15   Download

  • This book, “DSP for In-Vehicle and Mobile Systems”, contains a collection of research papers authored by prominent specialists in the field. It is dedicated to Professor Fumitada Itakura of Nagoya University. It is offered as a tribute to his sustained leadership in Digital Signal Processing during a professional career that spans both industry and academe. In many cases, the work reported in this volume has directly built upon or been influenced by the innovative genius of Professor Itakura....

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  • For some years, commentators have been predicting the 'convergence' of the Internet and mobile industries. But what does convergence mean? Is it just about mobile phones providing Internet access? Will the coming together of two huge industries actually be much more about collision than convergence? In truth, there are lots of possibilities about what convergence might mean, such as: • Internet providers also supply mobile phones - or vice versa, of course. • The user's mobile phone is replaced with a palmtop computer. • The mobile Internet leads to a whole range of new applications.

    pdf0p nguyenthucanh 03-05-2010 145 81   Download

  • An Introduction to 3G Networks Introduction What exactly are 3G networks? 3G is short for Third Generation (Mobile System). Here is a quick run-down: † 1G, or first generation systems, were analogue and offered only a voice service – each country used a different system, in the UK TACS (Total Access Communications System) was introduced in 1980. 1G systems were not spectrally efficient, were very insecure against eavesdroppers, and offered no roaming possibilities (no use on holidays abroad.)....

    pdf50p doroxon 12-08-2010 112 55   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Penetration Loss Measurement and Modeling for HAP Mobile Systems in Urban Environment Jaroslav Holis and Pavel Pechac

    pdf7p sting08 20-02-2012 15 2   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Adaptive Rate-Scheduling with Reactive Delay Control for Next Generation CDMA Wireless Mobile Systems

    pdf15p sting11 09-03-2012 14 2   Download

  • GSM (Global System for Mobile Communications, originally Groupe Spécial Mobile), is a standard set developed by the European Telecommunications Standards Institute (ETSI) to describe technologies for second generation (2G) digital cellular networks. Developed as a replacement for first generation (1G) analog cellular networks, the GSM standard originally described a digital, circuit switched network optimized for full duplex voice telephony.

    pdf178p zicokim 19-03-2010 287 202   Download

  • Acquisitions Editor: Angelina Ward Series Editor: S. Merrill Weiss Publishing Services Manager: George Morrison Project Manager: Mónica González de Mendoza Assistant Editor: Doug Shults Marketing Manager: Christine Degon Veroulis Cover Design: Eric DeCicco Focal Press is an imprint of Elsevier 30 Corporate Drive, Suite 400, Burlington, MA 01803, USA Linacre House, Jordan Hill, Oxford OX2 8DP, UK Copyright © 2007, Elsevier Inc. All rights reserved.

    pdf533p dieutan 17-05-2010 189 76   Download

  • Scope of the Book For some years, commentators have been predicting the ‘convergence’ of the Internet and mobile industries. But what does convergence mean? Is it just about mobile phones providing Internet access? Will the coming together of two huge industries actually be much more about collision than convergence? In truth, there are lots of possibilities about what convergence might mean, such as: † † † † Internet providers also supply mobile phones – or vice versa, of course.

    pdf20p doroxon 12-08-2010 126 51   Download

  • IP for 3G In this final chapter, it is appropriate to revisit the theme that started the book. Chapter 1 outlined some of the reasons why IP should be introduced into 3G networks; this chapter will explain in greater detail the technicalities of how IP could be introduced. One result will be that a network is developed that is much more faithful to the original ‘Martini’ vision than current 3G incarnations.

    pdf29p doroxon 12-08-2010 117 48   Download

  • Don’t be fooled. Although the .5 might give the impression that Dreamweaver CS5.5 is a point release, it’s anything but. Dreamweaver engineers have packed a stunning amount of new features into this version. To mention just a few, there’s code hinting for the popular jQuery JavaScript library, the ability to see what pages will look like at different screen resolutions without leaving the Document window, support for jQuery Mobile widgets, and integration of PhoneGap to build native apps for Android or iOS (the operating system used in the iPhone, iPad, and iPod touch)....

    pdf294p anhlada2002 15-07-2012 136 48   Download

  • Be familiar with the development of 2G mobile systems. Describe the architecture of a GSM network. Appreciate the main services provided within a GSM network. Understand the various facets of the GSM air interface including, access structures, frequency allocations, physical and logical channels.

    pdf0p hoangnam232 11-10-2010 96 47   Download

  • Our first chapter puts LTE into its historical context, and lays out its requirements and key technical features. We begin by reviewing the architectures of UMTS and GSM, and by introducing some of the terminology that the two systems use. We then summarize the history of mobile telecommunication systems, discuss the issues that have driven the development of LTE, and show how UMTS has evolved first into LTE and then into an enhanced version known as LTE-Advanced. The chapter closes by reviewing the standardization process for LTE....

    pdf0p aries23 29-09-2012 78 40   Download

  • The third generation (3G) mobile communication system is the next big thing in the world of mobile telecommunications. The first generation included analog mobile phones [e.g., Total Access Communications Systems (TACS), Nordic Mobile Telephone (NMT), and Advanced Mobile Phone Service (AMPS)], and the second generation (2G) included digital mobile phones [e.g., global system for mobile communications (GSM), personal digital cellular (PDC), and digital AMPS (D-AMPS)].

    pdf568p nhq_khtn 12-03-2011 92 38   Download

  • IP Mobility This chapter will provide an overview of IP mobility. It aims to be pretty selfcontained, and so should stand alone fairly independently of the other chapters. IP mobility is very important, because it is predicted that the vast majority of terminals will be mobile in a few years and that the vast majority of traffic will originate from IP-based applications. The challenge of ‘IP mobility’ is to deliver IP-based applications to mobile terminals/users, even though, traditionally, IP-protocols have been designed with the assumption that they are stationary...

    pdf58p doroxon 12-08-2010 87 33   Download

  • As stated in Chapter 1, Section 1.2, requirements for International Mobile Telecommunications-2000 (IMT-2000) include system flexibility, economy and conditions on data transmission speed defined in numerical terms. The minimum performance requirement in terms of transmission speed is 2 Mbit/s in an indoor environment, 384 kbit/s in a pedestrian mode and 144 kbit/s in a vehicle mode.

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  • The previous chapters have concentrated on the two leading second generation (2G) cellular systems: GSM and IS-95. These systems are deployed in many parts of the world and will continue to operate and evolve during the next decade as third generation (3G) systems are rolled out. We may expect that the new 3G systems will be harmonised with their evolved 2G counterparts, and that slowly 2G spectra will be refarmed to provide extra 3G spectra. No 3G systems are currently deployed, although trials are in progress. As a consequence, this chapter, which deals with systems that are about to be...

    pdf99p vankent 19-07-2010 80 29   Download

  • The Information Technology Laboratory (ITL) at the National Institute of Standards and Technology (NIST) promotes the U.S. economy and public welfare by providing technical leadership for the Nation’s measurement and standards infrastructure. ITL develops tests, test methods, reference data, proof of concept implementations, and technical analyses to advance the development and productive use of information technology.

    pdf99p khanhvi 03-03-2009 204 25   Download

  • Since the introduction of the first industrial robot UNIMATE in a General Motors automobile factory in New Jersey in 1961, robots have gained stronger and stronger foothold in the industry. In the meantime, robotics research has been expanding from fix based robots to mobile robots at a stunning pace. There have been significant milestones that are worth noting in recent decades.

    pdf346p bi_bi1 06-07-2012 50 23   Download

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