What is the purpose of the non-IP data transport procedure over the PC5 interface?
To transport IP data from the upper layers of a sending UE to the upper layers of the receiving UE
To transport non-IP data from the upper layers of a sending UE to the upper layers of the receiving UE
To transport non-IP data from the lower layers of a sending UE to the lower layers of the receiving UE
To transport IP data from the lower layers of a sending UE to the lower layers of the receiving UE