Question: In a 5G network, what are the two supported modes for EPS (Evolved Packet System) fallback, considering UE capability and network configuration constraints?
Option 1: Handover and Cell Reselection
Option 2: Redirection and Network Switching
Option 3: Load Balancing and Traffic Shaping
Option 4: Handover and Redirection
Explanation: EPS fallback is crucial for ensuring voice continuity in scenarios where UE and network coverage are limited. Given the constraints of UE capability and network configuration, EPS fallback operates in two primary modes: Handover, which involves transferring an ongoing call from one network to another, and Redirection, where the call setup is redirected from one network to another at the initiation stage. These modes directly impact voice continuity and are vital for network planning and optimization, affecting user perception of service quality.