 aggregation of three radio channels. Class Q corresponds to a total bandwidth between 200 MHz and 400 MHz from the aggregation of four radio channels. Classes O, P and Q belong to the same FallBack group 4 fallback list. CA class Cumulated bandwidth Number of CC Fallback group BWChannel < 400 MHz 1, 2, 3, 4 400 MHz <BWChannel_CA 800 MHz 800 MHz < Channel_CA 1200 MHz 200 MHz < BWChannel_CA < 400 MHz 400 MHz < BWChannel_CA < 600 MHz 600 MHz <BWChannel_CA < 800 MHz 100 MHz <BWChannel_CA < 200 MHz 200 MHz < BW Channel_CA < 300 MHz 300 MHz < BWChannel_CA < 400 MHz 400 MHz <BWChannel_CA < 500 MHz 500 MHz <BWChannel_CA < 600 MHz 600 MHz <BWChannel_CA < 700 MHz 700 MHz < Channel_CA < 800 MHz 100 MHz < BWChannel_CA < 200 MHz 150 MHz BWChannel_CA < 300 MHz 200 MHz < BWChannel_CA < 400 MHz Table 5.7. Carrier aggregation of the FR2 band In case of fallback, the maximum bands of each aggregated band are: - 100 MHz for FallBack group 4 fallback; - 100 MHz for the FallBack group 3 fallback; - 200 MHz for the FallBack group 2 fallback; - 400 MHz for the FallBack group 1 fallback. 5G-NR Radio Interface - Operations on the Frequency Bands In the specification of Release R.16, only intra-band aggregations are standardized. 5.2.2.2. Intra-band contiguous carrier aggregation In the FR2 band, Release R.16 proposes five aggregation schemes of contiguous intra-band carriers (Table 5.8). NR CA band NR band CA n257 CA_n258 CA_n259 CA_n260 CA_n261 Table 5.8. Carrier aggregation intra-band in FR2 Table 5.9 lists non-exhaustive combinations of contiguous intra-band carrier aggregation for the n257 bands for different classes B, C, D, E and F. The list of possible configurations is described in Table 5.5A.1.1 of specification TS 38.101-2. Bandwidth Bandwidth Bandwidth Bandwidth NR CA Cumulated configuration bandwidth (MHz) (MHz) (MHz) (MHz) (MHz) 50,100, CA_n257B 200, 400 50, 100, CA_n257C 200, 400 50, 100, CA_n257D 50, 100, CA_n257E 50, 100, CA_n257F Table 5.9. Contiguous intra-band carrier aggregation in the FR2 band NG-RAN and 5G-NR 5.2.2