 which 3GPP expects the UEs to support once they become available on the network side. Carrier-aggregation- and dual-connectivity-related capabilities, as well as BWP and SUL. Dual connectivity and carrier aggregation are naturally linked to the supported band combinations. The basic BWP operation is mandatory (without capability sig- naling), while all SUL aspects are optional for a UE. Channel coding does not have any specific capabilities. The data channel LDPC is naturally mandatory as well as the different alternatives for control channel encod- ing/decoding. Uplink power control, with basic power control operation, is mandatory. Interest- ingly, dynamic power sharing between LTE and 5G is also mandated for UEs. This allows (in contrast to semi-static UL power sharing) the coverage to be maximized on the 5G side also when compared to semi-static power sharing between LTE and 5G uplink transmissions. The large number of parameters may at the start of the network cause some confusion as to what is actually available on the UE side. The 3GPP specification finalization for the UE capability was only concluded in December 2018, and thus UEs need to follow that version of the specifications to be able to tell the network correctly which features they support. It cannot be guaranteed that UEs based on an earlier specification version will always be supported properly in the network. 6.18 Summary The 5G L1 design provides a capable and versatile radio design for different use cases and a large range of frequency bands. The flexibility with a large number of different parameters and options likely will cause some challenges until the implementations in the marketplace gain more clarity on the features actually supported in the field. The new L1 design with support for wideband operation and low complexity, yet high performance LDPC channel coding, enables higher bit rates than the earlier-generation designs. The new capabilities with beamforming allow the performance to be boosted and get most of the higher frequency