Question: In the NRPPa protocol, which entity is responsible for initiating an NRPPa transaction between a generic "access node" (e.g., gNB, ng-eNB) and a "server" (e.g., LMF)?
Option 1: The NG-RAN node initiates the transaction based on UE positioning needs.
Option 2: The server (e.g., LMF) is the only entity that can initiate an NRPPa transaction.
Option 3: Either the generic "access node" or the "server" can initiate the transaction, depending on the procedure type.
Option 4: Initiation is dynamically allocated between the entities based on network load.
Explanation: According to the NRPPa protocol's operational design for extensibility and clarity in transaction management, an NRPPa transaction is exclusively initiated by the server (e.g., Location Management Function, LMF). This ensures structured communication and reduces potential conflicts or ambiguities in the positioning and data acquisition processes between the LMF and NG-RAN nodes.