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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.

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Lecture 1 introduction

Lecture 1: Introduction

Professor Honggang Wang.

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

Email:[email protected]


Outline
Outline

  • Reasons to take this class

  • Syllabus

  • Course goals

  • Introduction

  • Survey


Three reasons to take this class
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



Some network companies of top fortune 500
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
Syllabus

  • See handout

  • What to learn?

    • The fundamental theory

    • Practical experiences


Class goals
Class Goals

  • 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)



Goal of wireless networks and mobile computing
Goal of Wireless Networks and Mobile Computing

“People and their machines should be able toaccess information and communicate with each othereasily and securely, in any medium or combination ofmedia – voice, data, image, video, or multimedia – anytime, anywhere, in a timely, cost-effective way.”

Dr. G. H. Heilmeier, Oct 1992


Wireless networks and mobile computing
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
Enabling Technologies

  • 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 -> embeddedcomputers/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
Mobile devices

  • Laptop/Notebook

  • fully functional

  • standard applications

  • Pager

  • receive only

  • tiny displays

  • simple text messages

  • PDA

  • graphical displays

  • character recognition

  • simplified WWW

Sensors,

embedded

controllers

  • Smartphone

  • tiny keyboard

  • simple versions of standard applications

  • Mobile phones

  • voice, data

  • simple graphical displays

www.scatterweb.net

performance

No clear separation between device types possible

(e.g. smart phones, embedded PCs, …)


Mobile and w ireless s ervices always best connected
Mobile and Wireless Services – Always Best Connected

UMTS Rel. 5

400 kbit/s

LAN

100 Mbit/s,

WLAN

54 Mbit/s

GSM 53 kbit/s

Bluetooth 500 kbit/s

LAN, WLAN

780 kbit/s

UMTS,

DECT

2 Mbit/s

GSM/EDGE 135 kbit/s,

WLAN 780 kbit/s

UMTS Rel. 6

400 kbit/s

GSM 115 kbit/s,

WLAN 11 Mbit/s


At home

WiFi

WiFi 802.11g/n

satellite

WiFi

UWB

bluetooth

WiFi

cellular

At Home


On the move
On the Move

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


Wearable health monitoring application ecg through wireless networks
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!!!

Traditional ECG system

Wireless ECG system


Wearable patient monitoring application ecg through wireless networks
Wearable Patient Monitoring Application (ECG) Through Wireless Networks

  • Wearable Resilient Electrocardiogram (ECG) networked sensor device used for patient monitoring

Software GUI interface

Wireless ECG medical sensor


On the road
On the Road Wireless Networks

GSM/UMTS, cdmaOne/cdma2000,WLAN, GPS

DAB, TETRA, ...

ad hoc

road condition,

weather,

location-based services,

emergency


Course coverage

Network Wireless Networks

Network

Course Coverage

Application

Application

Transport

Transport

Network

Network

Data Link

Data Link

Data Link

Data Link

Physical

Physical

Physical

Physical

Medium

Radio

Often we need to implement a function across multiple layers.


Survey

Survey Wireless Networks


Reference
Reference Wireless Networks

  • http://zoo.cs.yale.edu/classes/cs434/schedule.html

  • Mobile Communication book


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