Zoooooooom !!!
- The International Telecommunications Union (ITU) defines 4G technology as one that will allow data transfer rates of 1Gbit/sec at nomadic circumstances and 100Mbps at mobile circumstances.
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- 4G
- 4G is an initialism of the term Fourth-Generation Communications System. A
4G system will provide an end-to-end IP
solution where voice, data and
streamed multimedia can be served to users on an "Anytime, Anywhere" basis
at higher data rates than previous generations. No formal definition is set
as to what 4G is, but the objectives that are predicted for 4G can be
summarized as follows:
4G will be a fully IP-based integrated system of systems and network of
networks achieved after the convergence of wired and wireless networks as
well as computer, consumer electronics, communication technology, and
several other convergences that will be capable of providing 100 Mbit/s and
1 Gbit/s, respectively, in outdoor and indoor environments with end-to-end
quality of service and high security, offering any kind of services anytime,
anywhere, at affordable cost and one billing.
- 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, video chat, mobile TV, High definition
TV content, 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 bit/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.
