Question: In a Universal Subscriber Identity Module (USIM) Application Toolkit (USAT), when a non-GBR (Guaranteed Bit Rate) Quality of Service Class Identifier (QCI) is used for E-UTRAN or NG-RAN, how does the User Equipment (UE) handle the QoS octets in the 'EPS quality of service' information element?
Option 1: The UE processes all QoS octets as specified for GBR QCIs.
Option 2: The UE ignores only the first QoS octet but processes subsequent ones.
Option 3: The UE ignores all QoS octets in the 'EPS quality of service' information element and uses X=2, passing only the QCI value.
Option 4: The UE requires additional signaling to determine how to handle QoS octets for non-GBR QCIs.
Explanation: According to the specifications, in the case of a non-GBR QCI, the UE is instructed to ignore all QoS octets within the 'EPS quality of service' information element. Instead, the UE sets X=2 and only passes the QCI value, streamlining handling for non-GBR scenarios to focus on essential QCI information, ensuring efficient resource management without requiring detailed QoS parameters for non-guaranteed bit rate services.