EnggRoom_Code_mobile computing.pptEdge computing

Mobile computing

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MOBILE COMPUTING
Jitendra Patel
ROLL NO :- 38
TY MSC(CA & IT)

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According to a dictionary:
Mobile:
Able to move freely
Computing:
The activity of using a
computer
What is mobile computing?

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Mobile ComputingMobile Computing
Desktop Laptop
Mobile Computing?

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Mobile ComputingMobile Computing
•Able to communicate (or to access
information)
anytime, and anywhere
Portable
Devices
Wireless
Access
Network
Data Server,
Other People,
etc.

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Portable DevicesPortable Devices
Mobile phones
• voice, data
• simple text displays
PDA
• simple graphical displays
• character recognition
• simplified WWW
Palmtop
• tiny keyboard
• simple versions
of standard applications
Laptop
• fully functional
• standard applications

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Advantages and Limitations
Communicate
wherever you are
Access and change
electronic information
Access Internet
through wireless
network
•Limited battery life
•Screen display
•Slow mobile
Internet connection
•Wireless Internet
coverage may not
exist
•More costly
•Less rugged

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Paging Devices
Inexpensive
Lightweight
Different kinds
Numeric
Voice
Alphanumeric
Two-way pagers (transmitter)
Radio devices
Translate radio waves into digital signals

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Cellular Phone Features
Auto-redial
Call timers
Voice mail
Internet access
Microbrowser
Wireless Markup Language
Text messaging
SMS (Short Message Service)
MMS (Multimedia Message Service)

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Cell Phones Have the Same
Components as a Computer!
Processor (CPU)
Internal memory up to 750 KB
Store contact data, images,
ring tones
Operating system
Symbian OS
Input, Output devices
Microphone, keypad,
camera

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MP3 Players for Storing Music
Digital files (bits)
Varying storage space
Memory chips (64 to 256 MB)
Built-in hard drive (up to 40 GB)
Removable flash memory card (64 MB to 1GB)
Store up to 5,000 songs
Additional options:
Images
Video

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MP3 Player
Ripping
Converting a song from a CD into a digital MP3
file
Sampling Rate
Transfer Files to MP3 Player
Software
USB 1.0 port
FireWire port
USB 2.0 port

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(PDA)(PDA)
Personal Digital AssistantsPersonal Digital Assistants
•Small, smaller, smallest
•View, store and transmit data from a handheld
device
•New applications
•Mix of personal and business data
•Less personal
–Access and store corporate data

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PDAs Have the Same Components
as a Computer!
Palm computers or Handhelds
Processor (CPU)
Operating system
Palm OS
Pocket PC (Windows CE)
Storage
Input devices
Output devices
Ports

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PDA Hardware
Stylus for input
Keyboard
Integrated
Folding
Processor
Speeds vary
Internal memory
Flash memory
Eg. Memory Stick,
CompactFlash
card
LCD screens
Grayscale
Color
Digital cameras

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Tablet PCs
Portable and lightweight
Advanced handwriting recognition
Pressure sensitive screen
Digital pen, digital ink
Draw images and enter text
Speech recognition
Speech can be converted into text or
commands
Removable keyboard

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How about wireless networks?How about wireless networks?
Base
Station
S
h
a
r
e
d

C
h
a
n
n
e
l
Wireless users
access the network
by means of a
shared channel
Access capacity
is inherently
limited.

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Laptop Computers
Also called “notebooks”
Powerful portable solution
DVD/CD-RW
Larger displays/hard drives
RAM up to 1 GB
Slower processors than
desktops

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Laptop or Desktop?
More costly
Less expandable
Exposed to more hazards,
possibly theft
Great location flexibility
Can add devices using:
FireWire
USB ports
PC cards

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Number of Subscribers in Hong Kong
Mobile Phone
Fixed Telephone
Broadband Internet
Will wireless
Internet take
off?

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~:References:~
www.mobilecomputing.com
http://anyserver.cityu.edu.hk

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