Post on 28-Dec-2014
description
MOBILE HANDSETS
Contents
IntroductionHandset ArchitectureHandset Operating SystemsGenerations of mobile technologyMobile handsets according to technology
What Is A Mobile Handset?A mobile handset
(handset) is an electronic device that provides services to users, e.g.: Managing address book Scheduling calendar Cellular telephony Accessing Internet, email
Handsets include smartphones and PDAs
Example handsets:Apple iPhone, BlackBerry Storm, Palm TreoPro
What’s Inside a Mobile Handset?
Source: [3]
Handset Architecture (1)
Handsets use several hardware components: Microprocessor ROM RAM Digital signal processor Radio module Microphone and speaker Hardware interfaces LCD display
Handset Architecture (2)
Handsets store system data in electronically-erasable programmable read-only memory (EEPROM) Service providers can reprogram phones without
requiring physical access to memory chipsOS is stored in ROM (nonvolatile memory)Most handsets also include subscriber
identity module (SIM) cards
SIM Cards
They include their own microprocessor and 16 KB – 4 MB EEPROM
They come in two sizesTheir versatility arises from portability of
information SIM card identifies subscriber to network Stores personal information, address books,
messages, service-related information
Handset Operating Systems
Currently, handsets run several OSes: Symbian OS iPhone OS (an embedded version of OS X) Windows Mobile BlackBerry OS Google Android Platform (based on Linux)
With the exceptions of Symbian and Android, these OSes are proprietary [9–10]
Telecom carriers frequently “lock down” handset firmware, OSes to prevent user modifications
Advantages of mobile technologies
0G TELEPHONES
1G MOBILE HANDSETS
Ex for 2G MOBILE HANDSET
Ex for 3G mobile handset
Some examples for 4G mobile handsets
CONCLUSION
So by this presentation we can examine that as the technology is developing the compatibility and the features of the mobile handsets are increasing day by day.