Method and apparatus for downlink LBT, device and storage medium

An apparatus for downlink listen before talk (LBT), comprising a memory and a processor,

• wherein the memory is configured to store a computer program;
• when the computer program is executed, the processor is configured to detect channel energy and uplink transmission energy within a monitoring period;
• determine a channel state within the monitoring period according to the channel energy and the uplink transmission energy;
• and
• perform downlink data transmission when the channel state is an idle state;
• wherein the processor is further configured to determine the channel state within the monitoring period according to a difference between the channel energy and the uplink transmission energy:
• wherein the monitoring period comprises a plurality of detection time windows and a calculation time window, and the processor is further configured to detect respective channel energy within each detection time window, and calculate the uplink transmission energy within the calculation time window.

A non-transitory computer-readable storage medium on which a computer program is stored, wherein when the computer program is executed by a processor, the following steps are implemented:

• detecting channel energy and uplink transmission energy within a monitoring period;
• determining a channel state within the monitoring period according to the channel energy and the uplink transmission energy;
• and
• performing downlink data transmission when the channel state is an idle state;
• wherein the determining the channel state within the monitoring period according to the channel energy and the uplink transmission energy comprises:
• determining the channel state within the monitoring period according to a difference between the channel energy and the uplink transmission energy;
• wherein the monitoring period comprises a plurality of detection time windows and a calculation time window, and the detecting the channel energy and the uplink transmission energy within the monitoring period comprises:
• detecting respective channel energy within each detection time window, and calculating the uplink transmission energy within the calculation time window.