. 

NOTE 1   Administrations can implement all or parts of these frequency arrangements. 

NOTE 2   In the band 1

710 2

025 and 2

110 2

200 MHz three basic frequency arrangements (B1, B2 and 

B3) are already in use by public mobile cellular systems including IMT 2000. Based on these three 

arrangements, different combinations of arrangements are recommended as described in B4, B5 and B6. 

The B1 arrangement and the B2 arrangement are fully complementary, whereas the B3 arrangement 

partly overlaps with the B1 and B2 arrangements.  

For countries having implemented the B1 arrangement, B4 enables optimization of the use of spectrum 

for paired IMT 2000 operation. 

For countries having implemented the B3 arrangement, the B1 arrangement can be combined with the B2 

arrangement. Two different arrangements (B5 and B6) are therefore recommended to optimize the use of 

the spectrum: 

   B5 would implement the B2 arrangement to harmonize parts of the extension bands globally. B5 

enables the use of spectrum to be maximized for paired IMT 2000 operation in countries where B3 is 

implemented and where the whole band 1

710 1

850 MHz is available. 

   B6 enables the use of spectrum to be maximized for IMT 2000 in countries where B3 is implemented 

and where the band 1

770 1

850 MHz is not available in the initial phase of deployment of IMT 2000 

in this frequency band. 

NOTE 3   TDD may be introduced in unpaired bands and also under certain conditions in the uplink 

bands of paired frequency arrangements and/or in the centre gap between paired bands. 

NOTE 4   If selectable/variable duplex  technology is implemented within terminals as the most efficient 

way to manage different frequency arrangements, the fact that neighbouring countries could select either 

option B5 or B6 will have no impact on the complexity of the terminal. Further studies are necessary. 

 . 

In India, the requirements of IMT 2000 applications in the frequency bands 

1885  2025 MHz and 2110   2200 MHz is slated to be co ordinated with 

existing users initially for 1920  1980 MHz paired with 2110   2170 MHz (FDD 

mode) and 2010   2025 MHz (TDD mode) depending on the market needs 

and availability. Thus initial availability of about 60 + 60 MHz (paired) and 15 

MHz (unpaired) has been envisaged. If we look in Table 2 in this section it can 

be observed that IMT 2000 equipment would also be available in 1710 1785 

paired with 1805 1880 MHz, (B2 & B5 arrangements).  

2.4  

Technology Consideration 

Currently GSM, CDMA and Cor DECT technologies are in use in the country 

with each one of them having some claims to the spectrum.  The other 

evolving technology is the WAN technology, which is based on IEEE 802 

series of standards and use frequency bands 2.5 GHz, and 5 GHz.  These 

services are still evolving and their ultimate spectrum requirement will not be 

known for some time.  This aspect especially the enhanced services called 

4G, is expected to be covered in WARC 2007. 

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