Question: What is a requirement for a UE that supports RAN-assisted WLAN interworking based on access network selection and traffic steering rules?
Option 1: The UE must only support Wi-Fi frequencies in the 5GHz band.
Option 2: The UE needs to have an active cellular connection at all times.
Option 3: The UE shall support receiving RAN assistance parameters via system information and dedicated signalling.
Option 4: The UE is required to perform traffic steering autonomously without RAN input.
Explanation: For a User Equipment (UE) to effectively utilize RAN-assisted WLAN interworking, especially when following access network selection and traffic steering rules, it must be capable of receiving guidance from the Radio Access Network (RAN). This guidance, in the form of RAN assistance parameters, is crucial for making informed decisions about network selection and traffic management. Thus, the ability to receive these parameters via system information and dedicated signalling is a fundamental requirement for UEs supporting this feature, ensuring seamless integration between WLAN and cellular networks.