Question: What is the primary characteristic that distinguishes a direct bearer from an indirect bearer in terms of radio resource involvement?
Option 1: Direct bearers involve both Uu and PC5/N3C radio resources, while indirect bearers involve only one type of radio resource.
Option 2: Direct bearers involve only Uu radio resources, while indirect bearers involve a combination of Uu and PC5/N3C radio resources.
Option 3: Direct bearers are used for local communication, whereas indirect bearers are used for wide-area communication.
Option 4: Direct bearers involve only Uu radio resources, while indirect bearers involve either PC5 or N3C radio resources but not both.
Explanation: The correct answer is based on the distinction between direct and indirect bearers in terms of their involvement with different types of radio resources. A direct bearer involves only User Equipment (UE) to base station (Uu) communication, whereas an indirect bearer involves either PC5 (sidelink) or N3C (non-3GPP access) but not both, highlighting the difference in how these bearers utilize radio resources for communication.