© 2008 Prentice-Hall, Inc.1

Chapter 8Mobile Computing:

Keeping Your Data on Hand

© 2008 Prentice-Hall, Inc.2

Advantages and limitations of mobile computing

Mobile computing devices:• Pagers• Cell phones• PDAs• Portable media players

Synchronizing mobile devices with computers

Tablet PCs Notebooks

© 2008 Prentice-Hall, Inc.3

Advantages Convenience Boost productivity Communicate with

others anywhere Access to electronic

information

Limitations Expensive Battery life Small screen display Slow Internet speed

© 2008 Prentice-Hall, Inc.4

Pagers Cellular phones Portable media

players Personal digital

assistants Tablet PCs Laptop computers

© 2008 Prentice-Hall, Inc.5

Mobile Devices: Price, Size, Weight, and Capabilities

Device Relative Price ApproximateSize

Approximate Weight

Standard Capabilities

Paging Device $ (includes cost for the pager and a monthly plan)

2" × 2" × 0.5" 0.2 lbs. Provides numeric and/or textmessaging in one or two directions

Cell Phone $$ (includes cost for the phone, a monthly plan, and Internet access)

5" × 2" × 0.5".  0.25 lbs Provides voice and e-mail connectivity

MP3 Player $$–$$$ 3" × 2" × 1" 0.25 lbs. Provides storage of digital music filesand other data

PDA $$–$$$ 5" × 3" × 1" 0.5 lbs. Provides PIM capabilities, access toapplication software, and accessto the Internet

Tablet PC $$$$$ 10" × 8" × 1" 3 lbs. Provides PIM capabilities, access toapplication software, access to theInternet, and special handwriting andspeech-recognition capabilities

Laptop $$$$–$$$$$ 10" × 13" × 2" 5 to 8 lbs. Provides all the capabilities of a desktopcomputer while also being portable

© 2008 Prentice-Hall, Inc.6

Small wireless devices that receive numeric messages (phone numbers)

Recent technological advancements enable:• Voice paging:

Receiving voice messages• Alphanumeric paging:

Receiving numeric and text messages• Two-way paging:

Receiving and sending text messages

© 2008 Prentice-Hall, Inc.7

Full-featured communication and information storage devices

Features include:• Auto-redial• Call timers• Voice-mail• Voice-activated dialing• Internet access• Text messaging• Personal information management

© 2008 Prentice-Hall, Inc.8

Microprocessor (CPU):• Coordinates data between components• Runs the operating system• Symbian, Windows Mobile,

iPhone OS, Android Memory:

• ROM stores the operating system• Internal memory chips store:

Contact data Ring tones Images Small application programs

© 2008 Prentice-Hall, Inc.9

Microprocessor

Memory

Input devices:• Microphone• Keypad• Graffiti pad• Touch-screen• Digital camera

Output devices:• Speaker• LCD display

© 2008 Prentice-Hall, Inc.10

Microphone

Keypad

LCD display

Speaker

Text messaging:• Short Message Service

(SMS): Send messages up to 160

characters Free SMS information

• Multimedia Message Service (MMS): Send text, sound, images,

and video clips

AFAIK As far as I knowIDK I don’t knowB4N Bye for nowJAS Just a secBRB Be right backLOL Laughing out loudCUL See you laterQPSA ¿Qué pasa?FBM Fine by meT+ Think

positiveF2T Free to talkTTYL Talk to you laterG2G Got to goWUWH Wish you were hereHRU How are you?YBS You’ll be sorry

© 2008 Prentice-Hall, Inc. 11

Popular Text Messaging Abbreviations

Wireless Internet service provider Maximum speeds of 200 to 300

Kbps Micro-browser software

• EDGE and EVDO standards Difficult to display Web pages on

small screen Checking e-mail is a popular

feature Special “push” technology delivers

e-mail to a cell phone© 2008 Prentice-Hall, Inc.

12

MP3: • Format for storing music

Portable media player (PMP):• A small device that stores and plays music

Storage space determines the number of songs stored:• Memory chips 64 MB to 256 MB• Hard drive up to 40 GB• Sampling rate also affects number of songs stored

© 2008 Prentice-Hall, Inc.13

Media Capacity Built-In FlashMemory

Hard Disk Drive Capacity

Connectionto Computer

Other Features

Creative Labs Digital MP3 Player FX200

Up to 500 songs 256 MB to 1 GB None USB 2.0 port Built-in FM radio, voicerecorder, and five-bandequalizer

Oregon Scientific MP121

Up to 32 hours of music

512 MB to 1 GB None USB 2.0 port Waterproof to 3 feet, built-in pedometer, built-in FM radio, and equalizer

Apple iPod Nano Up to 1,000 songs or 25,000 images

1 GB to 4 GB None USB 2.0 port Weighs only 1.5 ounces,flash memory providesfor skip-free playback

Apple iPod Up to15,000 songs, 25,000 images, or 150 hours of video

None 30 GB to 60 GB USB 2.0 port Has calendar feature thatsyncs with Outlook; canserve as a small, portablehard drive

Creative Zen Vision

Up to 15,000 songs or 120 hours of movies

None 30 GB USB 2.0 port Integrated FM radio and voice recorder; syncswith Outlook

© 2008 Prentice-Hall, Inc.14

Used to add additional memory to portable media players

Types of flash memory:• Compact Flash:

64 MB to 1 GB• Multimedia (MMC) and

SmartMedia: 128 MB

• Secure Digital: 512 MB

• Sony Memory Stick: 128 MB

Software enables transfer of audio and video files

© 2008 Prentice-Hall, Inc.15

Is it illegal to download MP3 files?• MP3.com:

Song files are on a public server Permission is given by the artist or recording company

to place the files on the server A fee is paid to download a file.

• Napster: A file exchange site Song files were borrowed from users’ computers (peer-

to-peer [P2P] sharing) Sued for copyright infringement

© 2008 Prentice-Hall, Inc.16

Distributing nonmusic MP3 files over the Internet

Podcasts can be information, books on tape audio plays, etc.

People can listen when they wish iPod synchronization transfers new

content.

© 2008 Prentice-Hall, Inc.17

Small devices that store digital information

Known as palm computers or handhelds

PDA hardware includes:• CPU• Operating system• Storage capabilities• Input/output devices• Ports

© 2008 Prentice-Hall, Inc.18

Input devices Touch-screen with

stylus Keyboards:

• On-screen• Integrated• Folding

Digital cameras

Output devices LCD displays:

• Grayscale• Color

© 2008 Prentice-Hall, Inc.19

Popular processors:• Motorola DragonBall• Texas Instruments OMAP• Intel XScale

Comparing processors:• Speed• Performance:

Benchmarking • Power consumption

© 2008 Prentice-Hall, Inc.20

Palm OS Uses less memory

than Windows Mobile Easy to use graphical

interface Features include:

• Calendar• To-do list• Contact information• Viewing Videos• Playing MP3 files

Extra application software is available

Windows Mobile Scaled-down version of

Windows More expensive than

Palm OS Features include:

• PDA version of Microsoft Word and Excel

• Viewing videos• Playing MP3 files• Synchronizes with

Outlook Extra application

software is available

© 2008 Prentice-Hall, Inc.21

ROM stores the operating system and the basic programs

RAM stores additional applications and data

Flash memory is used for additional storage

© 2008 Prentice-Hall, Inc.22

PDA files can be transferred to a desktop using:• Flash card readers• Cradles

Synchronizing updates files on both the PDA and desktop

Wireless transfers:• IrDA• Bluetooth

© 2008 Prentice-Hall, Inc.23

An Internet connection requires a wireless ISP

Web pages are accessed using Wireless Application Protocol (WAP)

© 2008 Prentice-Hall, Inc.24

Standard software:• To-do list• Contacts manager• Calendar

Additional software:• Microsoft Word and

Excel• Games• Tools• References

Blueboard:• PDA display acts as

a drawing board• Connects to four

other PDAs

© 2008 Prentice-Hall, Inc.25

Cell phones with PDA capability

PDAs with cell phone capability

Handspring Treo Sony Ericsson P800

© 2008 Prentice-Hall, Inc. 26

Portable computers with handwriting recognition and speech recognition

Two monitor modes:• Laptop• Tablet

© 2008 Prentice-Hall, Inc.27

Tablet PC hardware includes:• CPU• Storage capabilities• Input/output devices• Ports

Digital ink technology:• Pressure sensitive screen• Digital pen

© 2008 Prentice-Hall, Inc.28

Windows XP Tablet PC is the operating system

Applications programs compatible with Windows XP are available

© 2008 Prentice-Hall, Inc.29

Computing power of a desktop Weigh 6 pounds

© 2008 Prentice-Hall, Inc.30

DVD/CD-RW drives Hard drives RAM Hot-swappable bays:

• Remove a drive and replace it with another type

Keyboard Built-in mouse LCD displays

© 2008 Prentice-Hall, Inc.31

Same operating systems as those found on desktops

Power management:• Shuts down the hard

drive• Turns off the monitor• Puts the computer into

standby mode

© 2008 Prentice-Hall, Inc.32

A full set of ports:• Parallel• Monitor• USB• Modem• Ethernet• Audio jacks• FireWire• PCI type I/II card

slots• DVI• IrDA

© 2008 Prentice-Hall, Inc. 33