Question: What is the primary assumption regarding the radio link used between a mobile base station relay and both the served UEs and the donor NG-RAN in a 5G network?
Option 1: LTE-Uu with fallback to NR-Uu for specific services
Option 2: NR-Uu for both links, distinguishing it from UE relay scenarios
Option 3: PC5-based link for direct connectivity enhancement
Option 4: Wi-Fi offload for non-mission-critical communications
Explanation: This is correct because the primary assumption is that the radio link used is NR-Uu for both links, distinguishing mobile base station relay scenarios from UE relay scenarios, which ensures seamless connectivity for UEs in various deployment conditions.