Question: In a 5G network, when a primary timing source (e.g., GNSS) fails, what action can the 5G system take to ensure continued time synchronization, considering device capabilities?
Option 1: Automatically switch to a default static timestamp until manual adjustment.
Option 2: Initiate a network-wide pause to synchronize with an alternate source upon restoration.
Option 3: Broadcast a "no service" alert to all UEs until the primary timing source is restored.
Option 4: Indicate to devices (e.g., UEs) that an alternate time source is available for use, considering device holdover capabilities.
Explanation: This option aligns with the requirement for the 5G system to support mechanisms indicating to devices the availability of an alternate time source, taking into account the devices' holdover capability. This ensures seamless transition and maintains network synchronization without disrupting service, reflecting a nuanced understanding of 5G's timing synchronization management.