Question: In half-duplex FDD operation for type B, how does the User Equipment (UE) create guard periods?
Option 1: By not transmitting in the last part of an uplink subframe and by not receiving a downlink subframe immediately preceding an uplink subframe.
Option 2: By not receiving a downlink subframe immediately preceding an uplink subframe from the same UE, and by not receiving a downlink subframe immediately following an uplink subframe from the same UE.
Option 3: By transmitting in the last part of a downlink subframe and by not receiving a downlink subframe immediately following an uplink subframe.
Option 4: By not transmitting in the first part of a downlink subframe and by not receiving an uplink subframe immediately preceding a downlink subframe.
Explanation: In type B half-duplex FDD operation, guard periods are created by the UE to ensure proper switching between transmission and reception. This is achieved by the UE not receiving specific downlink subframes that either immediately precede or follow an uplink subframe from the same UE, thus creating a guard period known as a half-duplex guard subframe.