Archive for May, 2011
4G simply means fourth generation in mobile technologies. It is the common name for IMT (International Mobile Telecommunications) Advanced standards defined by International Telecommunications Union (ITU). What does the standard mean to common man? It means an awesome one Gigabit per second of download speed, while you access the internet, through wireless means! When both the transmitting and receiving station are mobile, the speed is a bit less. When mobile, that is at a speed of at least 60mph, 4G offers you a download speed of 100 Megabits per second. Put more bluntly, 4G allows you to download an HD movie in no more than 30 seconds! ITU-Radiocommunications describes IMT-Advanced (4G) as a next generation network providing fast data access, unified messaging and broadband multimedia.
Now more pertinent questions, there are a lot of technologies offering high speed internet, how would one know if he/she is using this 4G stuff or not? Well, ITU has specified certain technical standards, which should be met by any technology that claims to be 4G. The specifications list the minimum data transfer rate that the proposed 4G network should have. The 4G working group has defined the following as objectives of the 4G wireless communication standard:
-A nominal data rate of 100 Mbit/s while the client physically moves at high speeds relative to the station, and 1 Gbit/s while client and station are in relatively fixed positions as defined by the ITU-R
-A data rate of at least 100 Mbit/s between any two points in the world.
-Flexible channel bandwidth, between 5 and 20 MHz, optionally up to 40 MHz.