on the aspects which were originally already studied during the study phase before the actual Release 15 5G Phase 1 specification work. The MIMO enhancements in Release 16 MIMO work item include the following: Enhancements for the MU-MIMO support, looking especially to reduce the overhead based on Type II CSI feedback (as explained in Chapter 6), and potentially enhance the feedback solution for a large number of receiver antennas (with more than two MIMO streams). Multi-TRP and multi-panel transmission are considered with the aim of improving especially the reliability and robustness of the connection (related to IIoT/URLLC operation) in different scenarios. Cases investigated cover both ideal and un-ideal backhaul. Both uplink and downlink signaling with non-coherent joint transmission are examined. Work on multi-beam operation for mmW spectrum, with the aim of reducing the related latency and overhead and defining uplink transmit beam selection facilitating panel-specific beam selection. Further secondary cell beam failure recovery is to be specified. Additional related measurements are to be specified as well. Enable full power uplink transmission with multiple power amplifiers. 15.2.7 Multi-Radio Dual Connectivity Enhancements The key element of the multi-radio dual connectivity enhancements is to complement the 5G-5G dual connectivity support started in Release 15. The late drop in Release 15 was finalized in June 2019 and includes support for the synchronized case of dual connectivity between two 5G connections. This naturally represents a limitation for 5G core Figure 15.9 5G-5G (NR-NR) dual connectivity example between FR1 and FR2. 5G (SCG) 5G (MCG) 28 GHz 3.5 GHz 5G UE 15.2 3GPP Release 16 Timing and Key Themes deployments as one would need to synchronize the different cell layers if the other one is, for example, an indoor mmW hot spot. The Release 16 approach will enable asyn- chronous case support. The key element is the related impact on power control in the case of asynchronous dual connectivity, w