Question: What is the primary condition for RRC (Radio Resource Control) re-establishment success rate in a known target cell, alongside a maximum allowed delay of less than 2 seconds?
Option 1: At least 75% successful RRC re-establishments with no additional delay constraints.
Option 2: Exactly 95% successful RRC re-establishments without considering the delay factor.
Option 3: A minimum of 80% successful RRC re-establishments observed during repeated tests.
Option 4: At least 90% successful RRC re-establishments observed during repeated tests.
Explanation: This question assesses understanding of telecom network performance metrics, specifically in the context of RRC re-establishment. The correct answer reflects a key performance indicator for ensuring reliable and efficient communication handovers in cellular networks, directly impacting user experience by balancing connection stability with timely re-establishment.