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Wireless Networks and Mobile Computing
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
7
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
9
“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
11
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 sensorSoftware 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