Question: What happens to the IPsec tunnel between the User Equipment (UE) and the Lightweight IP Security (LWIP) Security Gateway (SeGW) upon detection of an LTE radio link failure?
Option 1: The IPsec tunnel is temporarily suspended until the LTE connection is restored.
Option 2: The UE alone decides whether to release or maintain the IPsec tunnel based on internal policies.
Option 3: The IPsec tunnel is released, and both the LWIP-SeGW and the UE delete the Lightweight IP Security Pre-Shared Key (LWIP-PSK).
Option 4: The eNB takes over the IPsec tunnel management, relocating it to a different SeGW without releasing the current connection.
Explanation: Upon detecting an LTE radio link failure, the security protocol dictates the release of the IPsec tunnel for security and efficiency reasons. This involves both endpoints (LWIP-SeGW and UE) deleting the LWIP-PSK to ensure security integrity, aligning with standard practices in telecommunications for handling link failures in secure connections.