IMT-2000 are third generation mobile systems which are scheduled to start service around the year 2000 subject to market considerations. They will provide access, by means of one or more radio links, to a wide range of telecommunication services supported
ITU-R M.1390-1999 history
1999ITU-R M.1390-1999 Methodology for the Calculation of IMT-2000 Terrestrial Spectrum Requirements