It describes the higher versions of wireless communication. The sophisticated communication system prevailing today can be redefined using the 4G concepts.It has different meaning in different context,but according to (WWRF) Wireless World Research Forum 4G is a combination of wired and wireless networks in computer, consumer electronics and communication technology systems based on the internet technology, that can merge applications like the Wi-Fi and WiMAX capable of transmitting at a speed ranging from 100 Mbps (in cell-phone networks) to 1 Gbps (in local Wi-Fi networks)
It provide high quality and high point security() and low cost set up,officially named by IEEE as Beyond 3G(B3G).
4G Standardization
WiMAX is a technology that is very busy talking a lot of people as the future 4G technologies. Using IEEE 802.16 WiMAX standard. 802.16 standard included in the category of WMAN (Wireless Metropolitan Area Network). 802.16 standard has data transfer speeds up to 70 Mbps with network coverage reaching 5 kilometers.
IEEE (Institute of Electrical and Electronic Engineers) has assign several wirelesscommunication standards into 4 categories:
WPAN (Wireless Personal Area Network)
WPAN has maximum range of the network up to 10 meters. Examples of the use of WPAN is Bluetooth.
WLAN (Wireless Local Area Network)
WLAN has maximum range of the network up to 100 meters.
WMAN (Wireless Metropolitan Area Network)
WMAN has maximum range of the network up to 5 km.
WWAN (Wireless Wide Area Network)
WWAN has maximum range of the network up to 15 km.
The main objectives of 4G are:
1)4G will be a fully IP-based integrated system.
2)This will be capable of providing 100 Mbit/s and 1 Gbit/s speeds both indoors and outdoors.
3)It can provide premium quality and high security.
4)4G offer all types of services at an affordable cost.
APPLICATIONS:
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