Wireless Networks and Mobile Computing

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Nov 12, 2013 (4 years and 1 month ago)

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Wireless Networks and Mobile
Computing

Professor Honggang Wang.

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

Email:hwang1@umassd.edu

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:

1
6


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
d
eployment of wireless/mobile technology
and
i
nfrastructure


i
n
-
room, in
-
building, on
-
campus, in
-
the
-
field, MAN, WAN



Miniaturization of
c
omputing
m
achinery


.
. .
-
> 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,

embedded

controllers

www.scatterweb.net

No clear separation between device types possible

(e.g. smart phones, embedded PCs, …)

Mobile and
W
ireless
S
ervices


Always Best
Connected

UMTS,

DECT

2 Mbit/s

UMTS Rel. 6

400 kbit/s

LAN

100 Mbit/s,

WLAN

54 Mbit/s

UMTS Rel. 5

400 kbit/s

GSM 115 kbit/s,

WLAN 11 Mbit/s

GSM 53 kbit/s

Bluetooth 500 kbit/s

GSM/EDGE 135 kbit/s,

WLAN 780 kbit/s

LAN, WLAN

780 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

GSM/UMTS,

cdmaOne/cdma2000,

WLAN, GPS

DAB, 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