Question: In a TDD (Time Division Duplex) scenario, as per 3GPP specifications, after a User Equipment (UE) responds on Cell 1 in step d), what is its behavior regarding responding on other cells during cell selection?
Option 1: The UE can respond on any other cell within a specified time frame for cell selection.
Option 2: The UE's response on Cell 1 does not impact its ability to respond on other cells during the same step.
Option 3: The UE may choose to respond on either Cell 1 or another cell but not both in subsequent steps.
Option 4: The UE shall not respond on any other cell after responding on Cell 1, as per cell selection rules.
Explanation: This behavior is crucial for maintaining the integrity of the cell selection process in TDD systems. By not allowing the UE to respond on other cells after an initial response on Cell 1, the network ensures that the UE's signaling resources are managed efficiently and reduces potential interference or conflicts between cells. This aligns with principles of radio resource management in wireless communications, emphasizing controlled handovers and cell selections to maintain service quality.