Question: What type of radio link is used for communication between a Mobile Base Station Relay (MBSR), served User Equipment (UEs), and the IAB-donor node in a 5G network?
Option 1: LTE Uu
Option 2: Other
Option 3: NR Uu
Option 4: Not specified
Explanation: The New Radio (NR) air interface, specifically NR Uu, is used for communication between a Mobile Base Station Relay (MBSR), served User Equipment (UEs), and the IAB-donor node in a 5G network. This is because NR Uu is designed to support the necessary functionality for MBSR operations in 5G networks.