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4G is the short term for fourth-generation wireless. It is still a research lab standard , the stage of broadband mobile communications that will supersede the third generation (3G). It is expected that end-to-end IP and high-quality streaming video will be among 4G's distinguishing features.
A 4G system will be able to provide a comprehensive IP solution where voice , data and streamed multimedia can be given to the users on “ Anytime Anywhere ” basis and higher data rates than the previous generations.
It will be a fully IP based integrated system capable of providing between 100 Mbps to 1 Gbps in both indoor and outdoor with premium quality and high security.
It is going to be launched in the year 2010.
4G is being developed to accommodate the Quality of Service (QOS) and rate requirements set by forth coming applications like
1. MMS (Multimedia Messaging Service).
2. Wireless Broadband Service.
3. Video Chat.
4. Mobile TV.
5. Digital Video Broadcasting.
6. High Network Capacity.
7. Data Rate of 100 Mbps for mobile and 1 Gbps while stationary .
8. Smooth handoff across heterogeneous network..
9. Seamless Connectivity and Global Roaming across multiple networks.
Time-line from 1G to 4G and beyond:
The first generation, 1G wireless mobile communication systems, was introduced in the early 1980s. 1G wireless was analog and supported the first generation of analog cell phones with the speeds up to 2.4kbps.
The second generation, 2G system, fielded in the late 1980s.It was planned mainly for voice transmission with digital signal and the speeds up to 64kbps.
The third generation, 3G wireless system, also called UMTS (Universal Mobile Telecommunications Standard). , was developed in the late 1990s .3G is not only provided the transmission speeds from 125kbps to 2Mbps, but also included many services, such as global roaming, superior voice and video quality.
The fourth generation, 4G is a conceptual framework just raised in 2002. The speeds of 4G can theoretically be promised up to 1Gbps. The beyond will be 5G with incredible transmission speed with no limitation for access and zone size.
High Speed:– Data Rate of 100 Mbps for mobile and 1 Gbps while stationary.
Global Standard:-4G will be a global standard that provides global mobility and service portability so that service provider will no longer be limited by single-system.
Low Cost:– Access technologies, services and applications can unlimitedly be run through wireless backbone over wire-line backbone using IP address.
As the history of mobile communications shows, attempts have been made to reduce a number of technologies to a single global standard.
4G seems to be a very promising generation of wireless communication that will change the people’s life in the wireless world.
4G is expected to be launched by 2010 and the world is looking forward for the most intelligent technology that would connect the entire globe.