Question: In NR sidelink communication, what are the two modes of resource allocation for a User Equipment (UE) as specified in 3GPP standards?
Option 1: Only Scheduled resource allocation and Dynamic resource allocation
Option 2: Only UE autonomous resource selection and Random resource allocation
Option 3: Scheduled resource allocation and UE autonomous resource selection
Option 4: Only Adaptive resource allocation and Predictive resource allocation
Explanation: In NR sidelink communication, the two modes of resource allocation for a User Equipment (UE) are indeed Scheduled resource allocation and UE autonomous resource selection. The Scheduled resource allocation requires the UE to be in RRC_CONNECTED state and relies on NG-RAN scheduling transmission resources. On the other hand, UE autonomous resource selection allows the UE to transmit data when inside or outside NG-RAN coverage, regardless of its RRC state, by autonomously selecting transmission resources from a resource pool(s).