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2G / 3G / 4G ...There has been much market positioning by manufacturers and operators around which radio access technology is which generation. While there is general consensus that analog systems are first generation, and TDMA systems are second generation, it becomes much less clear what constitutes third generation or beyond. The following figure[1] illustrates this point. (It should be noted that what is labelled 3.5 G or 3.9 G is the view of the source of the diagram and is not an agreed ITU perspective.)
The current work on LTE and LTE-Advanced is generally considered 4G. For more information, click on: - What really is a Third Generation (3G) Mobile Technology? [1] This figure is taken from the following web site hence permission needs to be obtained to use it on the ITU-D web site: www.agilent.com/about/newsroom/tmnews/background/2008/01oct2008_fieldfox. There should be a similar figure in the “Handbook on IMT-2000 Deployment” developed in the ITU-T’s SSG and SG 19 but the author no longer has a copy of this. It is available at http://www.itu.int/publ/T-HDB-MOB.01-2003/en. |
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