Friday, 6 March 2015

GENERATIONS OF MOBILE DEVICE



GENERATIONS OF MOBILE DEVICE

Mobile device has been passed into different generation due to the development of technology of transfer data, voice and messages. Mobile have been used as a major device that facilitate communication.
Generation of mobile refers to the different generations of mobile device
It include
·        0G- zero generation
·        1G-first generation
·        2G-second generation
·        3G-third generation
·        4G-fourth generation
                                0G- ZERO GENERATION (1946-1980)
In zero generation the mobile phone was only use for transfer voice
In zero generation there are early mobile phones that is very expensive in that time and its mostly kept in cars, trucks and briefcase


1G-FIRST GENERATION (1980s-now)
First generation comes with the cellular phones network for radio signals (Analogy). The technology developed for AMPS/Data Tac
In this generation it composed of voice and limited data and the first blackberry (850) was developed.




2G-SECOND GENERATION (1990s-now)
The second generation cellular networks dominate with Digital data, SMS and Circuit switched data.
Technology developed GSM, iDEN,CDMA and TDMA



2.5 GENERATION
2.5G is the update of the 2G generation where technology based on marketing terms. The technology developed is GPRS, WiDEN,  HSCSD, EDGE, CDMA2000 and 1x-RTT

GSM- GLOBAL SYSTEM FOR MOBILE COMMUNICATION

GSM (Global System for Mobile communication) is a digital mobile telephony system that is widely used in Europe and other parts of the world. GSM uses a variation of time division multiple access (TDMA) and is the most widely used of the three digital wireless telephony technologies


GPRS- GENERAL PACKET RADIO SERVICE
General Packet Radio Service is a packet-switching technology that enables data transfers through cellular networks. It is used for mobile internet, MMS and other data communications. In theory the speed limit of GPRS is 115 kbps, but in most networks it is around 35 kbps. Informally, GPRS is also called 2.5G.
iDEN- INTERGRATED DIGITAL ENHANCED NETWORK

iDEN (Integrated Digital Enhanced Network) is a wireless technology from Motorola combining the capabilities of a digital cellular telephone, two-way radio, alphanumeric pager and data/fax modem in a single network.


CDMA-CODE DIVISION MULTIPLE ACCESS
CDMA (Code-Division Multiple Access) refers to any of several protocols used in so-called second-generation (2G) and third-generation (3G) wireless communications
CDMA is a form of multiplexing, which allows numerous signals to occupy a single transmission channel, optimizing the use of available bandwidth
3G-THIRD GENERATION (2004-now)
Third generation of the cellular networks comes with broadband data, voice and streaming video.
wireless network technologies must be able to provide a mobile device with a downlink connection speed of 384kbps in order to be considered a 3G technology.
Technology used W-CDMA (UMTS, FOMA), 1xEV-DO

4G-FOURTH GENERATION(THE FUTURE)
This generation is still on progress and target with high-speed broadband for data and visual-centric information
Transmit of data at 100mbps while moving and 1GB while standing still



G refers to the different generations of
G refers to the different generations of
3G) allows for voice, data
.

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