Granted Patent B2

US 12,598,639 · App. 18/032,708 · Granted Apr 7, 2026

Inventor: Meng Zhang (Shanghai, CN)

Assignee: Spreadtrum Communications (Shanghai) Co., Ltd.

H04W74/0808

Abstract

Claims (40)

1 . A method for downlink listen before talk (LBT), comprising:

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.

2 . The method according to claim 1 , wherein the calculation time window is between any two detection time windows of the plurality of detection time windows.

3 . The method according to claim 1 , wherein the calculation time window is after the at least one detection time window.

4 . The method according to claim 2 , wherein the determining the channel state within the monitoring period according to the difference between the channel energy and the uplink transmission energy comprises:

determining a channel state within each detection time window according to a respective difference between the channel energy within each detection time window and the uplink transmission energy; and

determining the channel state within the monitoring period according to the channel state within each detection time window.

5 . 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.

6 . The apparatus according to claim 5 , wherein the calculation time window is between any two detection time windows of the plurality of detection time windows.

7 . The apparatus according to claim 5 , wherein the calculation time window is after the at least one detection time window.

8 . The apparatus according to claim 6 , wherein the processor is configured to: determine a channel state within each detection time window according to a respective difference between the channel energy within each detection time window and the uplink transmission energy; and determine the channel state within the monitoring period according to the channel state within each detection time window.

9 . 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.

10 . The non-transitory computer-readable storage medium according to claim 9 , wherein the calculation time window is between any two detection time windows of the plurality of detection time windows.

11 . The non-transitory computer-readable storage medium according to claim 9 , wherein the calculation time window is after the at least one detection time window.

12 . The non-transitory computer-readable storage medium according to claim 10 , wherein the determining the channel state within the monitoring period according to the difference between the channel energy and the uplink transmission energy comprises:

determining a channel state within each detection time window according to a respective difference between the channel energy within each detection time window and the uplink transmission energy; and

determining the channel state within the monitoring period according to the channel state within each detection time window.

13 . The method according to claim 3 , wherein the determining the channel state within the monitoring period according to the difference between the channel energy and the uplink transmission energy comprises:

determining a channel state within each detection time window according to a respective difference between the channel energy within each detection time window and the uplink transmission energy; and

determining the channel state within the monitoring period according to the channel state within each detection time window.

14 . The apparatus according to claim 7 , wherein the processor is configured to: determine a channel state within each detection time window according to a respective difference between the channel energy within each detection time window and the uplink transmission energy; and determine the channel state within the monitoring period according to the channel state within each detection time window.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (22)