4 Frequency bands and channel arrangement
25.1423GPPBase Station (BS) conformance testing (TDD)Release 17TS
4.1 General
The information presented in this section is based on a chip rate of 3,84 Mcps, 1,28 Mcps respectively and 7.68 Mcps .
NOTE: Other chip rates may be considered in future releases.
4.2 Frequency bands
UTRA/TDD is designed to operate in the following bands:
a) 1900 – 1920 MHz: Uplink and downlink transmission
2010 – 2025 MHz Uplink and downlink transmission
b) 1850 – 1910 MHz: Uplink and downlink transmission
1930 – 1990 MHz: Uplink and downlink transmission
c) 1910 – 1930 MHz: Uplink and downlink transmission
d) 2570 – 2620 MHz Uplink and downlink transmission
e) 2300 – 2400 MHz Uplink and downlink transmission
f) 1880 – 1920 MHz: Uplink and downlink transmission
Note 1: Deployment in existing and other frequency bands is not precluded.
Note 2: In China, Band a only includes 2010 – 2025 MHz for 1.28 Mcps TDD option.
4.3 TX-RX frequency separation
4.3.1 3,84 Mcps TDD option
No TX-RX frequency separation is required as Time Division Duplex (TDD) is employed. Each TDMA frame consists of 15 timeslots where each timeslot can be allocated to either transmit or receive.
4.3.2 1,28 Mcps TDD option
No TX-RX frequency separation is required as Time Division Duplex (TDD) is employed. Each subframe consists of 7 main timeslots where all main timeslots (at least the first one) before the single switching point are allocated UL and all main timeslots (at least the last one) after the single switching point are allocated DL.
4.3.3 7,68 Mcps TDD option
No TX-RX frequency separation is required as Time Division Duplex (TDD) is employed. Each TDMA frame consists of 15 timeslots where each timeslot can be allocated to either transmit or receive.
4.4 Channel arrangement
4.4.1 Channel spacing
4.4.1.1 3,84 Mcps TDD option
The nominal channel spacing is 5 MHz, but this can be adjusted to optimise performance in a particular deployment scenario.
4.4.1.2 1,28 Mcps TDD option
The nominal channel spacing is 1,6 MHz, but this can be adjusted to optimise performance in a particular deployment scenario.
4.4.1.3 7,68 Mcps TDD option
The nominal channel spacing is 10 MHz, but this can be adjusted to optimise performance in a particular deployment scenario.
4.4.2 Channel raster
The channel raster is 200 kHz for all bands, which means that the carrier frequency must be a multiple of 200 kHz.
4.4.2.1 3,84 Mcps TDD Option
In addition a number of additional centre frequencies are specified according to table 5.1, which means that the centre frequencies for these channels are shifted 100 kHz relative to the general raster.
4.4.3 Channel number
The carrier frequency is designated by the UTRA absolute radio frequency channel number (UARFCN). The value of the UARFCN in the IMT2000 band is defined in the general case as follows:
Nt = 5 * F MHz 0,0 ≤ F ≤ 3276,6 MHz
where F is the carrier frequency in MHz.
Additional channels applicable to operation in the frequency band defined in sub-clause 5.2(d) for 3,84 Mcps are defined via the following UARFCN definition:
Nt = 5 * (F – 2150.1 MHz) 2572.5 MHz ≤ F≤ 2617.5 MHz
The 10 additional UARFCN for operations in frequency band defined in sub-clause 5.2(d) for 3,84 Mcps are hence: 2112, 2137, 2162, 2187, 2212, 2237, 2262, 2287, 2312, 2337.