Question: What action does the PCEF take if modification of the default EPS bearer QoS information fails after receiving authorized QoS over the Gx interface?
Option 1: Immediately release the default EPS bearer to prevent service disruption.
Option 2: Modify the subscribed QoS without PCRF approval to maintain network stability.
Option 3: Temporarily suspend all services for the UE until PCRF confirmation is received.
Option 4: Retain the existing default EPS bearer QoS, send a new CCR command to the PCRF with DEFAULT-EPS-BEARER-QOS_MODIFICATION_FAILURE event trigger.
Explanation: This action ensures continuity of service for the UE by maintaining the existing QoS settings while also notifying the PCRF of the modification failure. This allows for further policy decisions or troubleshooting, highlighting the importance of seamless service delivery and effective communication between PCEF and PCRF in telecom networks.