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Chapter 8

CIS 1000 Chapter 8: Chapter 8 CIS 1000


Department
Computing and Information Science
Course Code
CIS 1000
Professor
Zoe Zhu
Chapter
8

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Chapter 8 – CIS – Mobile Computing – Keeping Your Data on Hand
Subnotebooks – run fully featured operating systems but weight in at 2 pounds or less
Notebooks and Tablet PC’s – have larger screens and more power than subnotebooks
PMP = portable music player
CELL PHONES:
Have a CPU, memory, input and output devices, requires own OS
No standard OS, each phone manufacturer makes its own
Symbian OS – popular OS for PDA / smart phones
OS is stored in ROM (non-volatile, permanent)
Other phone data, ring tones – stored on memory chip
Input devices – microphone and keypad, camera
Output devices – LCD screen, speakers
Analog-to digital converter chip – turns voice sounds into digital signals
Digital signal processor – handle the compression work of digital data
Base transceiver station – large communications tower with antennas, amplifiers, receivers and transmitters
(is what allows you to make a call)
Mobile Switching Center – is a central location
o “drops out” – dropped call when stations are too far apart
SMS – Short Message Service – aka text messaging
MMS – Multimedia message service – send messages that include text, sound, images, video
Wireless Internet Service Provider (Wireless ISP)
Micro-browser software – enhance internet browsing on a cell phone
Wireless Markup Language (WML) – text based, no graphics, hit on mobile screen
PORTABLE MEDIA PLAYERS – PMP’S
Small portable devices that enable you to carry your MP3 files around with you, also can store video, audio
and images
Not all PMP’s carry music – some like PS, standalone GPS, etc
Flash Memory – a type of nonvolatile memory, to store files – is what MP3 players use
Sampling rate – the number of times per second the music is measured and converted to a digital value
(bigger is better quality, and larger file size) - Kbps
Peer-to-peer sharing (P2P) Sharing – process of transferring files between computers
PDA / SMARTPHONES:
PDA –is a small device that allows you to carry and process digital information
Smart Phones – cell phones that have advanced memory and processing power
o Both contain a CPU, OS, storage ,input and output devices, ports
Stylus – pen like device you can enter data directly
Have LCD screens
Processer Speed – measured in hertz (Hz) – number of operations (cycles) the processer completes each
second
Two main OS -> Palm Os and Windows Mobile , ROM holds OS, RAM holds applications and data
Ultra mobile / subnotebook – larger screen and more processing power than phones
NOTEBOOKS:
find more resources at oneclass.com
find more resources at oneclass.com
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