Question: What happens to an E-DCH MAC-d flow's multiplexing permissions if no new E-DCH MAC-d Flow Multiplexing List is signalled for it, but one was received in a previous Radio Link related procedure?
Option 1: The Node B will assume no restrictions for multiplexing the E-DCH MAC-d flow.
Option 2: The previously received list becomes invalid, and default restrictions apply.
Option 3: The Node B shall continue to use the previously received E-DCH MAC-d Flow Multiplexing List.
Option 4: The E-DCH MAC-d flow is barred from being multiplexed within a MAC-e/MAC-i PDU.
Explanation: According to the specifications, if an E-DCH MAC-d Flow Multiplexing List was already received for an E-DCH MAC-d flow in a previous procedure and none is signalled anew, the Node B continues to apply the multiplexing rules defined by the previously received list, ensuring continuity without introducing unnecessary restrictions or assumptions.