Lecture 1: Introduction

Lecture 1: Introduction

Professor Honggang Wang.http://www.faculty.umassd.edu/honggang.wang/teaching.html

Email:[email protected]

Outline Reasons to take this class

Syllabus

Course goals

Introduction

Survey

Three Reasons to Take This Class Wireless networks and mobile computing are

everywhere, and changing our world. What is their future?

Tons of job opportunities are available for wireless network engineers in current job market

Includes both lecture and hands-on project design, gain practical experiences

Job Opportunities

Some Network Companies of Top Fortune 500 Fortune rank:12 2008 profit: $8.05 Billion Avg. pay in that job:

$131,703

Fortune rank: 7 2008 profit: $12.87 Billion

• Fortune rank: 16• 2008 profit: $86.41

Billion

• Fortune rank: 244 • Avg. pay in that job:

$102,030

QUALCOMM

Syllabus See handout

What to learn? The fundamental theory Practical experiences

Class Goals

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Understand challenges and opportunities

Learn both fundamentals and applications of wireless networking and mobile computing

Obtain hands-on experiences through research projects

(e.g., protocol design, wireless and mobile device development)

Introduction

Goal of Wireless Networks and Mobile Computing

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“People and their machines should be able to access information and communicate with each other easily and securely, in any medium or combination of media – voice, data, image, video, or multimedia – any time, anywhere, in a timely, cost-effective way.”

Dr. G. H. Heilmeier, Oct 1992

Wireless Networks and Mobile Computing Two aspects of mobility:

user mobility: users communicate (wireless) “anytime, anywhere, with anyone”

device portability: devices can be connected anytime, anywhere to the network

Wireless vs. mobile Examples stationary computer notebook in a hotel wireless LANs in historic buildings Personal Digital Assistant (PDA)

The demand for mobile communication creates the need for integration of wireless networks into existing fixed networks: local area networks: standardization of IEEE 802.11 Internet: Mobile IP extension of the internet protocol IP wide area networks: e.g., internetworking of GSM and ISDN, VoIP over

WLAN and POTS

Enabling Technologies

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Development and deployment of wireless/mobile technology and infrastructure in-room, in-building, on-campus, in-the-field, MAN, WAN

Miniaturization of computing machinery . . . -> PCs -> laptop -> PDAs/smart phones ->

embedded computers/sensors

Improving device capabilities/software development environments, e.g., andriod: http://code.google.com/android/ iphone: http://developer.apple.com/iphone/ windows mobile

Mobile devices

performance

Pager• receive only• tiny displays• simple text messages

Mobile phones• voice, data• simple graphical displays

PDA• graphical displays• character recognition• simplified WWW

Smartphone• tiny keyboard• simple versions of standard applications

Laptop/Notebook• fully functional• standard applications

Sensors,embeddedcontrollers

www.scatterweb.net

No clear separation between device types possible (e.g. smart phones, embedded PCs, …)

Mobile and Wireless Services – Always Best Connected

UMTS,DECT2 Mbit/s

UMTS Rel. 6400 kbit/s

LAN100 Mbit/s,WLAN54 Mbit/s

UMTS Rel. 5400 kbit/s

GSM 115 kbit/s,WLAN 11 Mbit/s

GSM 53 kbit/sBluetooth 500 kbit/s

GSM/EDGE 135 kbit/s,WLAN 780 kbit/s

LAN, WLAN780 kbit/s

At Home

WiFi

WiFi

WiFi

cellular

bluetooth

UWB

satellite WiFi 802.11g/n

On the Move

Source: http://www.ece.uah.edu/~jovanov/whrms/

Wearable Health Monitoring Application (ECG) through Wireless Networks

Low cost wireless ECG medical sensor device has been built and tested to trace ECG signal through wireless networks. Then patients can freely walk around while patients can be monitored from anywhere!!!

Wireless ECG system

Traditional ECG system

Wearable Patient Monitoring Application (ECG) Through Wireless Networks Wearable Resilient Electrocardiogram

(ECG) networked sensor device used for patient monitoring

Wireless ECG medical sensor Software GUI interface

On the Road

ad ho

cGSM/UMTS, cdmaOne/cdma2000,WLAN, GPSDAB, TETRA, ...

road condition, weather,location-based services,emergency

Course Coverage

Application

Transport

Network

Data Link

Physical

Medium

Data Link

Physical

Application

Transport

Network

Data Link

Physical

Data Link

Physical

Network Network

Radio

Often we need to implement a function across multiple layers.

Survey

Reference http://zoo.cs.yale.edu/classes/cs434/schedule.

html Mobile Communication book