 caused to adjacent channels. More complex options can be considered as well. We already mentioned that multiple numerology downlink reception and uplink transmissions are not supported from a device point of view. However, the gNB can still transmit or receive using different numerologies to and from different devices. A gNB with good filtering characteristics between numerologies can assign them close together. In the uplink, there will be no additional RF requirements for the devices. Therefore, this needs to be considered by the gNB when planning the uplink resources scheduling between devices using different numerologies. NR numerology examples Variable frequency bands and carrier bandwidths are supported by flexible numerology. In the following diagram, you can observe different NR numerology examples. 5G Air Interface and Physical Layer Procedures - Part 1 Lower-frequency/wide-ared Low-to mid-frequency deployments (< ~6GHz) Higher frequencies/smaller cells deployments with less time dispersion Frequency domain Time domain Larger CP larger time Shorter symbol time dispersions in wide areas and CP potential for even lower latency 60 kHz Sub-carrier spacing 15 kHz 30 kHz 120 kHz normal CP/ECP Cyclic prefix (us) 4.7 US (6.6%) 2.4 us (6.6%) 1.2 ps/4.17ps 0.59 us (6.6%) Slot duration 500 US 250 US 125 US Symbols per slot 14/12 *4k FFT Max channel BW* [MHz] Figure 4.18 - Numerology examples To have large cell sizes and coverage, we should choose lower frequencies. However, larger time dispersions happen in wide areas with lower frequencies. So, to overcome this situation, larger cyclic prefixes are needed. Luckily, 15 kHz subcarrier spacing provides us with larger cyclic prefixes (4.7 us,) SO we can easily choose 15 kHz for wide-area deployments. Likewise, low- to mid-band frequencies have less time dispersion. Therefore, choosing 30 kHz subcarrier spacing with a cyclic prefix of 2.4 us would be enough to deal with fewer time dispersions. On the other hand, we will also see small cell deployments with higher freq