nnel by the aggregation of multiple DC radio channels and the Fallback Group. The class of radio bandwidth is associated with: - a number of CC radio channels per sub-block; - one bandwidth per radio channel; - an aggregated channel bandwidth; - a fallback group number. When the terminal is configured with a bandwidth class, it may move to a lower class associated with the same fallback group or release a DC radio channel. Different configurations for the aggregation of carriers are defined: - Contiguous intra-band: the radio channels can be contiguous in the same frequency band (intra-band contiguous CA) and are designated by the following denomination CA_nX, Class, with nX being the number of the band and Class the category of the aggregation of carriers (example CA_n77C). - Non-contiguous intra-band: the radio channels can be spaced in the same frequency band and are designated by the following denomination CA_nX (Class1, 5G-NR Radio Interface - Operations on the Frequency Bands Class2), with nX being the number of the band and Class the categories of the aggregation of carriers (example CA n77 (3A-C)). - Inter-band: the radio channels can be located in different frequency bands and are designated by the following denomination CA_nXA, nYA (example CA_n77- n79). Aggregated channels Intra-band 2 contiguous components carriers CA_n77C Frequency band n77 Intra-band Aggregated channels 2 non-contiguous components carriers CA_n77_2A) Frequency band n77 Inter-band Aggregated channels 2 components carriers CA_n77_n79 Frequency band n77 Frequency band n79 Figure 5.4. Aggregation of component carriers The nX band numbers have been partially defined in Table 4.1 for the FR1 band and Table 4.2 for the FR2 band. Each band number is associated with a maximum bandwidth and the associated numerologies (see 3GPP TS 38.101-1 Table 5.3.5-1 for the FR1 band and 3GPP TS 38.101-2 Table 5.3.5-1 for the FR2 band). The radio bandwidth classes are defined for each frequency band FR1 and FR2. In the case of the FR1 band, the inter-band 