Question: In a GSM cell re-selection scenario, what is the minimum required rate of correct cell re-selections with a confidence level of 95%, considering the specified delay constraints?
Option 1: 80% with a confidence level of 90%
Option 2: 90% with a confidence level of 95%
Option 3: 95% with a confidence level of 99%
Option 4: 85% with a confidence level of 92%
Explanation: This option correctly reflects the specified requirement for cell re-selection performance in GSM networks. Achieving at least a 90% rate of correct cell re-selections with a high confidence level (95%) ensures reliable network handovers, which is crucial for maintaining seamless user experience and service quality in mobile telecommunications. This requirement balances between the need for accurate handovers and the inherent uncertainties in wireless communication environments.