the UL uplink (UpLink). The numerology is associated with each radio channel and may be different from one radio channel to another. Radio channels can be aggregated according to several patterns (Figure 5.2): - radio channels may be contiguous in the same frequency band (intra-band contiguous CA); - radio channels can be spaced out in the same frequency band with maximum frequency separation (non-contiguous intra-band CA); - radio channels can be located in different frequency bands. For the aggregation of contiguous intra-band carriers, the bandwidth and guard band are calculated from the configuration information of the edge DC radio channels Fedge, low and Fedge,high- Aggregated UE Channel Bandwidth, BWchannel_ CA [MHz], BW channel_ CA (MHz) Lowest Carrier Transmission Highest Carrier Transmission Bandwidth Configuration [RB] Bandwidth Configuration [RB] Foffset,low Foffset, high Fedge, lov Fc, low Fc, high Fedge, high Figure 5.2. The bandwidth of CA channels (extract from TS 38.101 Figure 5.3A.2-1) NG-RAN and 5G-NR For the aggregation of non-contiguous intra-band carriers, the bandwidths are defined by sub-block; the sub-block may consist of the aggregation of several radio channels. Sub-block Bandwidth, BWChannel,block n (MHz) Sub-block Bandwidth, BWChannel.block n+1 (MHz) Transmission bandwidth Transmission bandwidth Transmission bandwidth Transmission bandwidth :configuration of the lowest configuration of the highest :configuration of the lowest configuration of the highest carrier in sub-block [RB] carrier in sub-block [RB] carrier in sub-block [RB] carrier in a sub-block (RB) Foffset,low Foffset,high Foffset, low Foffset,high Fcblock n,high Fedge,block n+1, low Fc,block n,low Fedge,block n,high Fc,block n+1,low Fc,block +1,high Fedge,block n+1,high Fedge,block n, low Sub-block n Sub-block n+1 Figure 5.3. Definition of the sub-block bandwidth for a non-contiguous intra-band spectrum (extract TS 38.101 Figure 5.3A.3-1) The radio channel aggregation notation determines the bandwidth class of the radio cha