Question: In the UTRAN Iur interface's RNSAP signalling, when initiating Radio Link Pre-emption to free resources for a new or modified Radio Link, how does the DRNS select the Radio Links to be pre-empted?
Option 1: Based on the descending order of their allocation priority and then by random selection among equals.
Option 2: In ascending order of their retention priority, ensuring lower priority links are pre-empted first.
Option 3: By evaluating the overall network congestion and selectively pre-empting links from the most congested areas.
Option 4: Through a round-robin selection process across all Radio Links with equal or lower allocation priority.
Explanation: This is because the pre-emption process prioritizes the retention of Radio Links based on their assigned priorities. To minimize disruption, links with lower retention priority (i.e., less important connections) are pre-empted first to free up resources for more critical or higher-priority establishments or modifications, ensuring efficient resource management while maintaining service quality for high-priority users.