Xem 1-20 trên 429 kết quả Mobile communication
  • 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

  • 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

  • This book focuses on issues related to multiple access for cellular mobile communications, with a specific interest in access arbitration through multiple access protocols situated at the lower sub-layer of the second OSI layer, namely the medium access control (MAC) layer. In this chapter, first an introduction to cellular mobile communication systems is provided.

    pdf478p taurus23 02-08-2012 41 14   Download

  • With some six billion mobile subscriptions now in use worldwide, around three-quarters of the world’s inhabitants now have access to a mobile phone. Mobiles are arguably the most ubiquitous modern technology in some developing countries, more people have access to a mobile phone than to clean water, a bank account or even electricity. Mobile communications now offer major opportunities to advance human development from providing basic access to education or health information to making cash payments and stimulating citizen involvement in democratic processes.

    pdf244p konbetocroi 03-01-2013 52 13   Download

  • GSM

    GSM (Global System for Mobile Communications), is a standard set developed by the European Telecommunications Standards Institute (ETSI) to describe technologies for second generation digital cellular networks. Developed as a replacement for first generation analog cellular networks, the GSM standard originally described a digital, circuit switched network optimized for full duplex voice telephony. The standard was expanded over time to include first circuit switched data transport, then packet data transport via GPRS (General Packet Radio Services)....

    pdf67p huemanvdoc 25-11-2009 441 248   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

  • The Artech House Universal Personal Communications Series Ramjee Prasad, Series Editor CDMA for Wireless Personal Communications, Ramjee Prasad IP/ATM Mobile Satellite Networks, John Farserotu and Ramjee Prasad Multicarrier Techniques for 4G Mobile Communications, Shinsuke Hara and Ramjee Prasad OFDM for Wireless Multimedia Communications, Richard van Nee and Ramjee Prasad Radio over Fiber Technologies for Mobile Communications Networks, Hamed Al-Raweshidy and Shozo Komaki, editors Simulation and Software Radio for Mobile Communications, Hiroshi Harada and Ramjee Prasad TDD-CDMA for Wirele...

    pdf40p khinhkha 20-07-2010 120 63   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

  • Digital communications is a rapidly advancing applications area. Significant current activities are in the development of mobile communications equipment for personal use, in the expansion of the available bandwidth (and hence information carrying capacity) of the backbone transmission structure through developments in optical fibre, and in the ubiquitous use of networks for data communications.

    pdf1073p meoyeuagu 21-05-2013 44 26   Download

  • This study focuses on the future direction in wireless/mobile telecommunications as a standalone concept for building wireless IP systems, including commercial, campus, local and global networks. It examines the integration of the Internet and mobile networks, which are merging as a result of global demand for seamless mobile communication.

    pdf385p ken333 06-07-2012 54 20   Download

  • This book follows from my first edition and is intended to provide a thorough, up to date, treatment of wireless physical communications. The book is derived from a compilation of course material that I have taught in a graduatelevel course on physical wireless communications at Georgia Tech over the past decade. This textbook differs from others on the subject by stressing mathematical modeling and analysis. My approach is to include detailed derivations from first principles.

    pdf771p trungkiendt9 16-07-2013 47 13   Download

  • During the past years, there has been a quickly rising interest in radio access technologies for providing mobile as well as nomadic and fixed services for voice, video, and data. The difference in design, implementation, and use between telecom and datacom technologies is also getting more blurred.

    pdf651p nguyenan122 09-10-2013 38 11   Download

  • The telecom industry is on the rebound and the demand for more and newer wireless services is ever increasing. To meet these market demands, wireless providers have to deploy advanced radio access networks to enhance the mobile communications infrastructure. This forward-looking book delivers a comprehensive overview of the evolution of mobile radio access networks, focusing on high-level architectural issues that engineers and managers need to understand.

    pdf263p transang5 23-11-2012 29 8   Download

  • This briefing paper was commissioned by Ericsson (global provider of telecommunications equipment and related services) and Zain (mobile operator active in seven Middle Eastern and fifteen sub-Saharan African countries) in order to describe the social and economic impact that mobile communication is having in Sudan. The paper aims to give a concise overview of the key economic and social effects of mobile telephony in Sudan and the social and economic development case for continued investment in telecommunications infrastructure by foreign companies.

    pdf46p socolanong 19-04-2012 36 6   Download

  • Tuyển tập các báo cáo nghiên cứu khoa học ngành toán học được đăng trên tạp chí toán học quấc tế đề tài: Mobile communication for Intellectually Challenged people: A proposed set of requirements for interface design on touch screen devices

    pdf6p dauphong11 04-02-2012 26 5   Download

  • Recent Developments in Mobile Communications – A Multidisciplinary Approach Edited by Juan P. Maícas Published by InTech Janeza Trdine 9, 51000 Rijeka, Croatia Copyright © 2011 InTech All chapters are Open Access distributed under the Creative Commons Attribution 3.0 license, which allows users to download, copy and build upon published articles even for commercial purposes, as long as the author and publisher are properly credited, which ensures maximum dissemination and a wider impact of our publications.

    pdf284p khangoc2399 21-09-2012 27 4   Download

  • The objective of the study: Analyze and evaluate the competitiveness of the state providing mobile communication services of a telecom company in Vietnam, comparing the strengths and weaknesses of the provision of services between the companies together and find out the problems to be solved in order to improve their competitiveness;...

    pdf0p nguyenthiminh32 12-07-2014 18 4   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 A USIM-Based Uniform Access Authentication Framework in Mobile Communication

    pdf12p dauphong14 13-02-2012 18 3   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: Mobile communication for Intellectually Challenged people: A proposed set of requirements for interface design on touch screen devices

    pdf6p sting06 16-02-2012 30 3   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 Interference Robust Transmission for the Downlink of an OFDM-Based Mobile Communications System

    pdf14p sting10 24-02-2012 25 3   Download

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