Question: What is the primary purpose of using guard symbols in IAB-node operation?
Option 1: To enable simultaneous transmission and reception by IAB-MT and IAB-DU
Option 2: To overcome potentially misaligned symbol boundaries between IAB-MT and IAB-DU operations
Option 3: To indicate the required IAB-MT's uplink transmission timing mode via MAC-CE
Option 4: To facilitate enhanced multiplexing capabilities by providing recommended IAB-MT's Tx/Rx beams
Explanation: Guard symbols are used to overcome potentially misaligned symbol boundaries between the IAB-MT operation and the IAB-DU operation, which is essential for facilitating transitioning from IAB-MT to IAB-DU operation and vice versa. This ensures that the IAB-node can operate efficiently and effectively, without any disruptions or misalignments in symbol boundaries.