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Wireless and Mobile Technology-Introduction

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Wireless and Mobile Technology-Introduction

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Mobile Communications
Summer Term 2005 FU Berlin Computer Science Computer Systems & Telematics Prof. Dr.-Ing. Jochen Schiller http://www.jochenschiller.de/ schiller@computer.org Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/ MC SS05 1.1

Overview of the lecture
Introduction
Use-cases, applications Definition of terms Challenges, history

Broadcast Systems
DAB, DVB

Wireless LANs
Basic Technology IEEE 802.11a/b/g, .15, Bluetooth

Wireless Transmission
frequencies & regulations signals, antennas, signal propagation multiplexing, modulation, spread spectrum, cellular system

Network Protocols
Mobile IP Ad-hoc networking Routing

Media Access
motivation, SDMA, FDMA, TDMA (fixed, Aloha, CSMA, DAMA, PRMA, MACA, collision avoidance, polling), CDMA

Transport Protocols
Reliable transmission Flow control Quality of Service

Wireless Telecommunication Systems
GSM, HSCSD, GPRS, DECT, TETRA, UMTS, IMT-2000

Support for Mobility
File systems, WWW, WAP, i-mode, J2ME, ...

Satellite Systems
GEO, LEO, MEO, routing, handover

Outlook

Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/

MC SS05

1.2

Chapter 1:

Introduction

A case for mobility – many aspects History of mobile communication Market Areas of research

Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/

MC SS05

1.3

Computers for the next decades?
Computers are integrated
small, cheap, portable, replaceable - no more separate devices

Technology is in the background
computer are aware of their environment and adapt (“location awareness”) computer recognize the location of the user and react appropriately (e.g., call forwarding, fax forwarding, “context awareness”))

Advances in technology
more computing power in smaller devices flat, lightweight displays with low power consumption new user interfaces due to small dimensions more bandwidth per cubic meter multiple wireless interfaces: wireless LANs, wireless WANs,...