Question: What is the requirement for the connection between a remote UE and a relay UE in terms of RAT and band usage?
Option 1: The connection must use only 3GPP RAT and licensed bands.
Option 2: The connection can use either 3GPP RAT or non-3GPP RAT, but only with licensed bands.
Option 3: The connection can use either 3GPP RAT or non-3GPP RAT, and either licensed or unlicensed bands.
Option 4: The connection must use fixed broadband technology exclusively.
Explanation: According to the requirements for the 5G system, the connection between a remote UE and a relay UE shall be able to use 3GPP RAT or non-3GPP RAT and use licensed or unlicensed bands. This flexibility in using different types of radio access technologies (RATs) and spectrum bands is essential for enabling various deployment scenarios and ensuring seamless connectivity.