#2 TELECOMMUNICATION : MOBILE COMMUNICATION (1G VS 2G VS 3G VS 4G VS 5G)

Mobile communication technology:

1G stands for the first generation of wireless telephone technology. The first generation is the analog telecommunication  came on 1980's and exists till being introduced 2G digital communication. The main difference between 1G and 2G is radio signal that is 1G network is analog while a 2G
network is digital.

           After this 2.5 was introduced which is called as GPRS that is a  General Packet Radio Service.It is implemented a packet switched domain in addition to the circuit switched. 2G uses packet data.

           After this 2.75 was introduced that is EDGE (Enhanced Data Rate for GSM Evolution). It is an enhancement in GPRS with 8PSK encoding. It is also called as Enhanced GPRS (EGPRS),IMT Signal carrier(IMT-SC). It allows improved transmission rate as it is the best standard of GSM. It provides caller ID, call forwarding, short messaging.

           After this 3G was introduced the third generation of wireless mobile telecommunications technology, 3G provides fixed wireless mobile internet, mobile tv, video calls. After this 3.5 and 3.75 was introduced that provides some broadband services and mobile high-speed internet access of some Mbit per second. And every new standard has released approx 10-year gap that is 2G came in 1982, 3G in 1998 and 4G in 2008.

        After this 4G came into the picture in 2008 stands for 4th generation wireless mobile telecommunications technology. 4G provides IP telephony, high-speed mobile, wireless internet access and it also provides broadband internet service. 4G is  nothing but LTE that is Long Term Evolution. It is the fasted network as of now in mobile communication.

       5G stands for a 5th generation wireless system. Its  standard is  beyond LTE and it has more capacity than 4G.It provides a higher number of mobile broadband users per unit area and allowing higher consumption of data.

FEATURES	1G	2G/2.5g	3G	4G	5G
Signal Technology	Analog	Digital	Board bandwidth CDMA,IP technology	IP technology, LAN, WAN	IP technology and seamless combination of broadband
Deployment	1970/1984	1980/1999	1990/2002	2000/2010	2010/2015
Data Bandwidth	2 kbps	14.4 kbps-64 kbps	2 Mbps	200 Mbps-1Gbps	1 Gbps and higher
Standards	Amps	2G:TDMA,CDMA GSM 2.5G:GPRS,EDGE	WCDMA CDMA2000	LTE	single unified standard
Frequency	150 MHz & above	900 MHz	850,900,2100 MHz	2-8 GHz	15 GHz
Speed	up to 2.4 kbps	2G:up to 64 Kbps 2.5G: 144kbps	from 144kbps -2Mbps	100 Mbps -1Gbps	10 times more than 4G
Access	TACS	TDMA, CDMA	wideband CDMA	Multicarreir CDMA or TDMA	OFDMA,SCMA NOMA
		DRAWBACKS
Size	Large	Smaller than 1g	Smaller than 2G	Smaller than 3G	Smaller than 4G
Security	No security	Have security	Have security	Have more security	Have security
Camera	No camera	Camera	Camera	Camera	Camera
ADVANTAGES	No such advantage	2.5G: Phone calls,	Faster communication	High-speed	High uploading and downloading speed up to 1Gbps
		Send and  receive emails	Send and receive large email and SMS	High capacity	Better & fast solution
		web browsing	High-speed web	Low cost per bit	Highly supportable to WWWW
			Video conferencing	IP-based mobile system	Large phone memory
			3D gaming	Global access	Dialing speed
			TV streaming	Broadband service	Clarity of audio, video.
			Mobile TV	Faster video streaming	Provides up to 25 Mbps connectivity speed
				Better spectral efficiency	Support VPN
				Larger bandwidth for data sharing	Remote diagnostics is great feature in 5G

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