Unit-1: Mobile computing lecture notes P.R.Engineering college

Unit-1: Mobile computing lecture notes in Mobile computing uploaded at P.R.Engineering college

Unit-1: Mobile computing lecture notes in Mobile computing at P.R.Engineering college P.R.Engineering college Staff uploaded in lecturenotes.net

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Introduction
Goal:
To understand the key concepts of mobile communication networks and protocols, as the 
major pillar of the modern information technology.
1.1 Introduction - The fundamentals of wireless transmissions
In present and future the computers are portable. But the users need to access the 
networks. To do this the only choice is wireless. Mobile computing means communicating 
different things to different people. It is ubiquitous, wireless and remote computing .Wireless and 
mobile computing are not synonymous. Wireless is a transmission or information transport 
method that enables mobile computing.
Topics to be covered:
Wireless transmission
Frequencies for radio transmission 
Signals
Antennas
Signal Propagation 
Multiplexing 
Modulations
Spread spectrum
MAC – SDMA , FDMA , TDMA , CDMA
Cellular Wireless NetworksIT1403-MOBILE COMPUTING IV YEAR / VIII SEM
DEPARTMENT OF CSE 2 PREC
1.1.1 Wireless
The way of accessing the network was by wire. The wires are replaced by 
electromagnetic waves through the air.
A communication device can have one of the following characteristics:
1. Fixed and Wired: (e.g.,) Desktop uses fixed Networks.
2. Mobile and Wired: (e.g.,) Laptop connected using Telephone and Modem.
3. Fixed a Wireless: This mode is used for installing network in historical buildings to 
avoid damage caused due to wiring.
4. Mobile and Wireless: No cable and the users can roam.
1.1.2 Wireless networks in comparison to fixed networks
Higher loss-rates due to interference 
Restrictive regulations of frequencies
Lower security, simpler active attacking 
Always shared medium

Title:
Unit-1: Mobile computing lecture notes

Subject:
Mobile computing

Institute:
P.R.Engineering college

Unit-1: Mobile computing lecture notes P.R.Engineering college

Unit-1: Mobile computing lecture notes in Mobile computing uploaded at P.R.Engineering college

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