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How will 4G technology work and How the network will be installed and be used?
Harshal1988
4G is being developed to accommodate the quality of service (QoS) and rate requirements set by forthcoming applications like wireless broadband access, Multimedia Messaging Service (MMS), video chat, mobile TV, HDTV content, Digital Video Broadcasting (DVB), minimal service like voice and data, and other streaming services for "anytime-anywhere". The 4G working group has defined the following as objectives of the 4G wireless communication standard:
* A spectrally efficient system (in bits/s/Hz and bits/s/Hz/site),[2]
* High network capacity: more simultaneous users per cell,[3]
* 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,[1]
* A data rate of at least 100 Mbit/s between any two points in the world,[1]
* Smooth handoff across heterogeneous networks,[4]
* Seamless connectivity and global roaming across multiple networks,[5]
* High quality of service for next generation multimedia support (real time audio, high speed data, HDTV video content, mobile TV, etc)[5]
* Interoperability with existing wireless standards,[6] and
* An all IP, packet switched network.[5]
In summary, the 4G system should dynamically share and utilise network resources to meet the minimal requirements of all the 4G enabled users.
According to the 4G working groups, the infrastructure and the terminals of 4G will have almost all the standards from 2G to 4G implemented. Although legacy 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 platform where the new innovations and evolutions can fit. The technologies which are being considered as pre-4G are the following: Flash-OFDM, WiMax, WiBro, iBurst, 3GPP Long Term Evolution and 3GPP2 Ultra Mobile Broadband. One of the first technology really fullfilling the 4G requirements as set by the ITU-R will be LTE Advanced as currently standardized by 3GPP. LTE Advanced will be an evolution of the 3GPP Long Term Evolution. Higher data rates are for instance achieved by the aggregation of multiple LTE carriers that are currently limited to 20MHz bandwidth. The above is from Wikipedia. To read the full article, see the page link, further down this page, listed under "Related Links."
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