Question: In a TDD UTRAN scenario, what are the primary components that contribute to the Re-establishment delay when a UE reconnects to a known cell after a radio link failure?
Option 1: TRRC-RE-ESTABLISH, TUE-RE-ESTABLISH-REQ-KNOWN, and additional buffering time
Option 2: Tsearch, TRA, and the time for RRC connection setup
Option 3: TSI, N313 timer, and UE's processing delay
Option 4: TRRC-RE-ESTABLISH (including N313 and T313) and TUE-RE-ESTABLISH-REQ-KNOWN (encompassing Tsearch, TSI, and TRA)
Explanation: The Re-establishment delay to a known cell is composed of two primary components: TRRC-RE-ESTABLISH (including N313 and T313) and TUE-RE-ESTABLISH-REQ-KNOWN (encompassing the time for cell search, receiving system information, and the random access procedure), collectively defining the total Re-establishment delay.