The Mobile phone or wireless generations (G) generally change of the service Nature . compatible transmission & non-backwards technology, and new frequency bands. Every New generations had appeared after every ten years since1981 when the first move analog (1G) was invent to digital (2G) transmission in 1992. This was followed more advance and modern by 3G mulch-media supported,its touch the peak with the supports of 200 kbit/s. 2011 is called the Revolutionary year because of 4G technology invention ,
Four famous generation of Mobile phone or hand sets are available in market from 1980 to till now .
What is 1G?
1G the first Mobile phone was invent 1980 fist time & that was analog phone which was called “Brick Phone” & “Bag Phone “. That Cell phone was start 1 G technology and called first generation, wireless analog Phone. that was used that time in some advance countess’s elite class people law enforcement agencies, and Armed forces. That technology was convert soon in 2 G in 1990.
What is 2G?
2G technology had started in early in 1992 . 1 g analog have fully replace into 2 G digital network. that was first time when 2 G commercial network has been began on global system for mobile Communications, or GSM, standard. 2G on GSM standards used commercial practice in 1991 by Radiolinja, a Finnish GSM operator which was founded on September 19, 1988. Radiolinja ( Elisa), 2G or GSM protocol also utilizes Different other digital protocols, with CDMA, TDMA, iDEN and PDC. GSM is based on TDMA.
What is 3G?
At the end of 20th century 2 G was convert in 3 G Technology. that is a new invention of 21st century especially in mobile phone networks. 3 G suspend 2 G technology and step in 4G technology for advance ideas. 3G systems had established through ITU’s project on International Mobile Telecommunications 2000 (IMT-2000).
3G technologies have able to fast data transmission , Advance network capacity and great network services. In May 2001, NTT DoCoMo (Japan) launched the first per-commercial 3G network – branded as FOMA. After the first per-commercial launch, NTT DoCoMo again made history on October 1, 2001, when they lunched first commercial 3G in Japan.
Now UMTS-HSPA is leading 3G technology in the world. UMTS-HSPA and LTE 3G technologies are expected to 3.9 billion global subscriptions, compared to 569 million CDMA EV-DO subscriptions and 59 million WiMAX subscriptions.
What is 4G?
4G is the most advance technology used in modern world. Fourth generation of mobile wireless services which was defined by the ITU and its Radio communication Sector (ITU-R) established globally accepted definition in IMT- Advanced.
The ITU has developed technology arcading to requirements which is the coming next generation wireless technology. An IMT- Advanced cellular system following requirements. must fulfill .
Based on switched network all-IP packet
High data rates approximately 100 Mbit/s for high mobility and approximately 1 Gbps for low mobility
Dynamically share and use of network resources for supporting more simultaneous cell per user
High link spectrum performance of 15 bit/s/Hz in the down-link, and 6.75 bit/s/Hz in the up link
System spectrum performance of up to 3 bit/s/Hz/cell in the down link and 2.25 bit/s/Hz/cell for indoor usage
An Ability to offer services of high quality for coming generation multimedia support