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.
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.
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....
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.
An Introduction to 3G Networks
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.)....
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
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
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.
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.
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.
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,
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)....
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.
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....
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)].
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...
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.
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...
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
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.