Question: What action does a CRNC take when receiving a BLOCK RESOURCE REQUEST with a 'Low Priority' Blocking Priority Indicator, if the indicated logical resources are currently in use?
Option 1: Immediately prohibit the use of the logical resources and reject new traffic.
Option 2: Allow ongoing sessions to finish but prohibit new traffic from using the resources until they become idle.
Option 3: Ignore the request until all resources are idle, then block them.
Option 4: Prohibit the use of the logical resources only when they become idle, while not allowing new traffic to use them during this waiting period.
Explanation: According to the procedure for handling blocking priorities, a 'Low Priority' indicator means the CRNC should wait for the resources to become idle before blocking them. Additionally, to prevent misuse during the waiting period, new traffic is not allowed to utilize these resources once the block request is received, aligning with efficient resource management in UTRAN environments.