4G

After the evolution of 3G network comes the next generation , 4G is Fourth-Generation. It is a term used to describe the next complete evolution in wireless communications. It is the advanced version of 3G network. A 4G system will be able to provide a comprehensive IP solution where voice, data and streamed multimedia can be given to users on an "Anytime, Anywhere" basis, and at higher data rates than previous generations.4G is being developed to accommodate the quality of service and rate requirements set by forthcoming applications like wireless broadband access, Multimedia Messaging Service (MMS), Video chat , Mobile T V, HD TV content, Digital Video Broadcasting (DVB), minimal service like voice and data, and other streaming services for "anytime-anywhere".



Objectives of the 4G wireless communication standard

• A Spectrally efficient system (in bits/s/Hz and bits/s/Hz/site).
• High network capacity: more simultaneous users per cell.
• 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.
• 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.
• An all IP, packet switched network.