Granted Patent B2

US 12,538,286 · App. 17/281,110 · Granted Jan 27, 2026

Inventor: Mingju Li (Beijing, CN)

Assignee: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.

H04W72/046H04B7/0695H04L1/1812H04W16/14H04W72/56H04W74/0816

Abstract

Claims (51)

1 . A method for channel detection on an unlicensed frequency spectrum, applied to a base station, the method comprising:

determining a channel detection mechanism corresponding to a target beam among n beams based on information to be transmitted over a channel corresponding to the target beam, where n is an integer greater than 1, wherein in a case that the information to be transmitted is at least one of a synchronization signal block (SSB) or reference signal (RS), the channel detection mechanism corresponding to the target beam is a first mechanism in which no channel detection is performed, and in a case that the information to be transmitted is at least one of downlink control information (DCI) or downlink service data, the channel detection mechanism corresponding to the target beam is a second mechanism in which channel detection is performed based on a contention window, wherein the first mechanism is a mechanism that does not involve listen before talk (LBT), the second mechanism is a random back-off type LBT mechanism with a fixed contention window size (CWS);

detecting whether a channel corresponding to the target beam is idle based on the channel detection mechanism corresponding to the target beam;

determining a channel detection time requirement corresponding to the target beam, wherein the channel detection time requirement comprises a detection time duration;

detecting whether the channel corresponding to the target beam is idle in a time period that meets the channel detection time requirement based on the channel detection mechanism corresponding to the target beam;

determining a proportion of a hybrid automatic repeated request non-acknowledgment (HARQ-NACK) value corresponding to the target beam when determining that the channel detection mechanism corresponding to the target beam is an LBT Cat.4 mechanism, wherein the LBT Cat.4 mechanism is a mechanism with a variable CWS; and

updating a CWS value corresponding to the target beam based on the proportion of the HARQ-NACK value corresponding to the target beam.

2 . The method according to claim 1 , further comprising:

determining a channel detection sequence corresponding to the n beams; and

detecting whether channels corresponding to the n beams are idle one by one based on the channel detection sequence corresponding to the n beams, where a beam requiring channel detection among the n beams is the target beam.

3 . The method according to claim 2 , wherein determining the channel detection sequence corresponding to the n beams further comprises:

determining the channel detection sequence corresponding to the n beams based on a priority of information to be transmitted over a channel corresponding to each of the n beams.

4 . The method according to claim 1 , wherein a channel detection energy threshold corresponding to each of the n beams is independently determined.

5 . A non-transitory computer-readable storage medium storing at least one computer program that, when run by a processor, causes the processor to perform a method for channel detection on an unlicensed frequency spectrum as defined in claim 1 .

6 . An apparatus for channel detection on an unlicensed frequency spectrum, comprising:

a processor; and

a memory that is configured to store at least one instruction executable by the processor,

wherein the processor, when executing the at least one instruction, is caused to perform operations comprising:

determining a channel detection mechanism corresponding to a target beam among n beams based on information to be transmitted over a channel corresponding to the target beam, wherein n is an integer greater than 1, wherein in a case that the information to be transmitted is at least one of a synchronization signal block (SSB) or reference signal (RS), the channel detection mechanism corresponding to the target beam is a first mechanism in which no channel detection is performed, and in a case that the information to be transmitted is at least one of downlink control information (DCI) or downlink service data, the channel detection mechanism corresponding to the target beam is a second mechanism in which channel detection is performed based on a contention window, wherein the first mechanism is a mechanism that does not involve listen before talk (LBT), the second mechanism is a random back-off type LBT mechanism with a fixed contention window size (CWS);

detecting whether a channel corresponding to the target beam is idle based on the channel detection mechanism corresponding to the target beam;

determining a channel detection time requirement corresponding to the target beam, wherein the channel detection time requirement comprises a detection time duration;

detecting whether the channel corresponding to the target beam is idle in a time period that meets the channel detection time requirement based on the channel detection mechanism corresponding to the target beam;

determining a proportion of a hybrid automatic repeated request non-acknowledgment (HARQ-NACK) value corresponding to the target beam when determining that the channel detection mechanism corresponding to the target beam is an LBT Cat.4 mechanism, wherein the LBT Cat.4 mechanism is a mechanism with a variable CWS; and

updating a CWS value corresponding to the target beam based on the proportion of the HARQ-NACK value corresponding to the target beam.

7 . The apparatus according to claim 6 , wherein the processor performs operations further comprising:

determining a channel detection sequence corresponding to the n beams; and

detecting whether channels corresponding to the n beams are idle one by one based on the channel detection sequence corresponding to the n beams, where a beam requiring channel detection among the n beams is the target beam.

8 . The apparatus according to claim 7 , wherein determining the channel detection sequence corresponding to the n beams further comprises:

determining the channel detection sequence corresponding to the n beams based on a priority of information to be transmitted over a channel corresponding to each of the n beams.

9 . The apparatus according to claim 6 , wherein the processor performs operations further comprising:

determining a channel detection energy threshold corresponding to each of the n beams independently.

10 . A method for channel detection on an unlicensed frequency spectrum, applied to a terminal, the method comprising:

determining a channel detection mechanism corresponding to a target beam among n beams based on information to be transmitted over a channel corresponding to the target beam, where n is an integer greater than 1, wherein in a case that the information to be transmitted is a random-access request, the channel detection mechanism corresponding to the target beam is a first mechanism in which no channel detection is performed, and in a case that the information to be transmitted is at least one of uplink control information (UCI) or uplink service data, the channel detection mechanism corresponding to the target beam is a second mechanism in which channel detection is performed based on a contention window, wherein the first mechanism is a mechanism that does not involve listen before talk (LBT), the second mechanism is a random back-off type LBT mechanism with a fixed contention window size (CWS);

detecting whether a channel corresponding to the target beam is idle based on the channel detection mechanism corresponding to the target beam;

determining a channel detection time requirement corresponding to the target beam, wherein the channel detection time requirement includes a detection time duration;

detecting whether the channel corresponding to the target beam is idle in a time period that meets the channel detection time requirement based on the channel detection mechanism corresponding to the target beam;

determining a proportion of a hybrid automatic repeated request non-acknowledgment (HARQ-NACK) value corresponding to the target beam when determining that the channel detection mechanism corresponding to the target beam is an LBT Cat.4 mechanism, wherein the LBT Cat.4 mechanism is a mechanism with a variable CWS; and

updating a CWS value corresponding to the target beam based on the proportion of the HARQ-NACK value corresponding to the target beam.

11 . The method according to claim 10 , further comprising:

determining a channel detection sequence corresponding to the n beams; and

detecting whether channels corresponding to the n beams are idle one by one based on the channel detection sequence corresponding to the n beams, where a beam requiring channel detection among the n beams is the target beam.

12 . The method according to claim 11 , wherein determining the channel detection sequence corresponding to the n beams further comprises:

determining the channel detection sequence corresponding to the n beams based on a priority of information to be transmitted over a channel corresponding to each of the n beams.

13 . The method according to claim 10 , wherein a channel detection energy threshold corresponding to each of the n beams is independently determined.

14 . The method according to claim 10 , wherein the method further comprises:

receiving channel detection indication information from a base station that indicates whether the channel corresponding to the target beam is idle; and

determining the target beam requiring channel detection based on the channel detection indication information.

15 . The method according to claim 10 , wherein the method further comprises:

determining a receive beam recently used for receiving information as the target beam for channel detection.

16 . The method according to claim 10 , wherein the method further comprises:

determining a transmit beam recently used for transmitting information as the target beam for channel detection.

Assignments (1)

Continuity (1)

References Cited (33)