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4G refers to the fourth generation of cellular wireless and is a successor to 3G and 2G standards. By using 4G technology you could download an entire movie in about a minute. A 4G system may upgrade existing communication networks and is expected to provide a comprehensive and secure IP based solution where facilities such as voice, data and streamed multimedia will be provided to users on an “Anytime, Anywhere” basis and at much higher data rates compared to previous generations. This 4G systems, the next generation of their old 3G systems which has 384 Kbps downloads and 129 Kbps uploads, could receive data at 100Mbps on the move and at up to a gigabit per second while static. 4G is being developed to accommodate the QoS and rate requirements set by forthcoming applications like wireless broadband access, MMS, video chat, mobile TV, HDTV content, minimal services like voice and data, and other services that utilize bandwidth.

Mobile TV – TV in your Hand

Objectives of 4G

* A spectrally efficient system.

* High network capacity: more simultaneous users per cell,

* A nominal data rate of 100 Mbit/s while the client functioning and 1 Gbit/s while client and station are in static.

* A data rate of at least 100 Mbit/s between any two points in the world.

* Smooth handoff across heterogeneous networks.

* Seamless connectivity and global roaming across multiple networks.

* High quality of service for next generation multimedia support (real time audio, high speed data, HDTV video content, mobile TV, etc).

* Interoperability with existing wireless standards, and

* An all IP, packet switched network.

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4G features

According to the members of the 4G working group, the infrastructure and the terminals of 4G will have almost all the standards from 2G to 4G implemented. Although legacys systems are in place to adopt existing users, the infrastructure for 4G will be only packet-based (all-IP). Some proposals suggest having an open Internet platform. Technologies considered to be early 4G include: Flash-OFDM, the 802.16e mobile version of Wi-Max, and HC-SDMA.

4G phone – launch in 2010

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