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Fourth-Generation Communications System (4G)
   

The Vision of 4G (ITU-R M.1645) (source 3gamericas)

 
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.
   
   
Objectives

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),
  • 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, and
  • An all IP, packet switched network.

In summary, the 4G system should dynamically share and utilise network resources to meet the minimal requirements of all the 4G enabled users.

   

Towards 4G (Vision of NTT DoCoMo)
   

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