Frequency Spectrum Allocation of 3G Mobile Communication
In 1992, World Radio-communication Conference (WRC-92) allocated the frequency bands for the 3G mobile communication, with a total bandwidth of 230 MHz, as shown in Figure
At WRC92, ITU planned the symmetric frequency spectrum resources of 120MHz (1920 MHz ~ 1980 MHz, 2110 MHz ~ 2170 MHz) for use by the FDD, and asymmetric frequency spectrum resources of 35 MHz (1900 MHz ~ 1920 MHz, 2010 MHz ~ 2025 MHz) for use by the TDD.
At WRC 2000, the 800 MHz band (806 MHz ~ 960 MHz), 1.7 GHz band (1710 MHz ~ 1885 MHz), and 2.5 GHz band (2500 MHz ~ 2690 MHz) were added for use by the IMT-2000 services.
These two combined make the future spectrum for 3G reach over 500 MHz, reserving enormous resource space for future applications.