Sidelink control method and apparatus, and user equipment

1 . A method for sidelink control, comprising:

receiving, by a user equipment, configuration information;

determining, by the user equipment, a sidelink channel busy ratio measurement value corresponding to a first time unit based on a proportion of sidelink channels having a received signal strength indication (RSSI) measurement value greater than a configured threshold over a measurement time unit set, wherein the measurement time unit set comprises B time units selected from A time units before the first time unit, where A and B are numbers determined based on the configuration information, and B is less than A, and wherein the B time units are selected from the A time units according to time units within which the user equipment enters an energy-saving state; and

determining, by the user equipment, a transmission limit of sidelink communication on a second time unit according to the sidelink channel busy ratio measurement value;

wherein the second time unit meets a defined condition with respect to the first time unit;

wherein the measurement time unit set used for the user equipment in the energy-saving state to determine the sidelink channel busy ratio measurement value is a subset of a measurement time unit set used for the user equipment in a non-energy-saving state to determine the sidelink channel busy ratio measurement value; and

wherein in a case where a number of B time units greater than a first number threshold cannot be selected from the A time units, the sidelink channel busy ratio measurement value is determined as a default value.

2 . The method of claim 1 , wherein A represents a number of time units used by the user equipment in the non-energy-saving state for determining the sidelink channel busy ratio measurement value.

3 . The method of claim 1 , wherein the defined condition comprises:

a time interval between the first time unit and the second time unit is not greater than a first time length threshold.

4 . The method of claim 3 , further comprising determining the first time length threshold based on at least one of:

a communication protocol;

predefined or pre-configured information;

downlink control information sent by a base station;

an identifier indicating the first time length threshold sent by the base station, and a correspondence between the identifier and the first time length in the communication protocol; or

the identifier indicating the first time length threshold sent by the base station, and a correspondence between the identifier and the first time length sent by the base station.

5 . The method of claim 1 , wherein the sidelink channel busy ratio measurement value is a default measurement value in a case that a number of time units used by the user equipment for determining the sidelink channel busy ratio measurement value is below a preconfigured threshold.

6 . The method of claim 5 , further comprising at least one of:

obtaining, by the user equipment, the default measurement value through predefined or pre-configured information; or

determining the sidelink channel busy ratio measurement value based on at least one of:

downlink control information sent by a base station;

an identifier indicating the sidelink channel busy ratio measurement value sent by the base station, and a correspondence between an identifier and the sidelink channel busy ratio measurement value in a communication protocol; or

the identifier indicating the sidelink channel busy ratio measurement value sent by the base station, and a correspondence between the identifier and the sidelink channel busy ratio measurement value sent by the base station.

7 . The method of claim 1 , wherein the first time unit is a time unit closest to the second time unit in a candidate time unit, and the candidate time unit is one or more time units meeting the defined condition with respect to the first time unit.

8 . The method of claim 1 , wherein,

time units within the measurement time unit set are not later than the first time unit, and a distance between the first time unit and each time unit within the measurement time unit set is not greater than a second time length threshold; or

a number of time units within the measurement time unit set is not less than the first number threshold.

9 . The method of claim 8 , wherein the second time length threshold is determined based on a state of the user equipment.

10 . The method of claim 9 , further comprising:

determining the second time length threshold corresponding to each state of the user equipment based on downlink control information sent by a base station; or

determining the second time length threshold corresponding to each state of the user equipment based on a communication protocol.

11 . The method of claim 8 , further comprising at least one of:

obtaining the first number threshold based on predefined or pre-configured information; or

determining the first number threshold based on at least one of:

a state of the user equipment;

downlink control information sent by a base station;

an identifier indicating the first number threshold sent by the base station, and a correspondence between the identifier and the first number threshold in a communication protocol; or

the identifier indicating the first number threshold sent by the base station, and a correspondence between the identifier and the first number threshold sent by the base station.

12 . The method of claim 1 , wherein the B time units are explicitly indicated in the configuration information as non-contiguous units selected from the A time units.

13 . A user equipment, comprising:

a processor;

a transceiver; and

a memory storing executable programs, wherein the processor is configured to:

receive configuration information;

determine a sidelink channel busy ratio measurement value corresponding to a first time unit based on a proportion of sidelink channels having a received signal strength indication (RSSI) measurement value greater than a configured threshold over a measurement time unit set, wherein the measurement time unit set comprises B time units selected from A time units before the first time unit, where A and B are numbers determined based on the configuration information, and B is less than A, wherein the B time units are selected from the A time units according to time units within which the user equipment enters an energy-saving state; and

determine a transmission limit of sidelink communication on a second time unit according to the sidelink channel busy ratio measurement value;

wherein the second time unit meets a defined condition with respect to the first time unit;

wherein the measurement time unit set used for the user equipment in the energy-saving state to determine the sidelink channel busy ratio measurement value is a subset of a measurement time unit set used for a user equipment in a non-energy-saving state to determine the sidelink channel busy ratio measurement value; and

wherein in a case where a number of B time units greater than a first number threshold cannot be selected from the A time units, the sidelink channel busy ratio measurement value is determined as a default value.

14 . The user equipment of claim 13 , wherein A represents a number of time units used by the user equipment in the non-energy-saving state for determining the sidelink channel busy ratio measurement value.

15 . The user equipment of claim 13 , wherein the defined condition comprises:

a time interval between the first time unit and the second time unit is not greater than a first time length threshold.

16 . The user equipment of claim 15 , wherein the processor is further configured to determine the first time length threshold based on at least one of:

a communication protocol;

predefined or pre-configured information;

downlink control information sent by a base station;

an identifier indicating the first time length threshold sent by the base station, and a correspondence between the identifier and the first time length in the communication protocol; or

the identifier indicating the first time length threshold sent by the base station, and a correspondence between the identifier and the first time length sent by the base station.

17 . The user equipment of claim 13 , wherein the sidelink channel busy ratio measurement value is a default measurement value in a case that a number of time units used by the user equipment for determining the sidelink channel busy ratio measurement value is below a preconfigured threshold.

18 . The user equipment of claim 17 , wherein the processor is further configured to perform at least one of:

obtaining the default measurement value through predefined or pre-configured information; or

determining the sidelink channel busy ratio measurement value based on at least one of:

downlink control information sent by a base station;

an identifier indicating the sidelink channel busy ratio measurement value sent by the base station, and a correspondence between an identifier and the sidelink channel busy ratio measurement value in a communication protocol; or

the identifier indicating the sidelink channel busy ratio measurement value sent by the base station, and a correspondence between the identifier and the sidelink channel busy ratio measurement value sent by the base station.

19 . The user equipment of claim 13 , wherein the first time unit is a time unit closest to the second time unit in a candidate time unit, and the candidate time unit is one or more time units meeting the defined condition with respect to the first time unit.

20 . A non-transitory storage medium having executable programs stored thereon, wherein, when the executable programs are executed by a processor of a user equipment, the user equipment is caused to perform:

receiving configuration information;

determining a sidelink channel busy ratio measurement value corresponding to a first time unit based on a proportion of sidelink channels having a received signal strength indication (RSSI) measurement value greater than a configured threshold over a measurement time unit set, wherein the measurement time unit set comprises B time units selected from A time units before the first time unit, where A and B are numbers determined based on the configuration information, and B is less than A, wherein the B time units are selected from the A time units according to time units within which the user equipment enters an energy-saving state; and

determining a transmission limit of sidelink communication on a second time unit according to the sidelink channel busy ratio measurement value;

wherein the second time unit meets a defined condition with respect to the first time unit;

wherein the measurement time unit set used for the user equipment in the energy-saving state to determine the sidelink channel busy ratio measurement value is a subset of a measurement time unit set used for the user equipment in a non-energy-saving state to determine the sidelink channel busy ratio measurement value; and

wherein in a case where a number of B time units greater than a first number threshold cannot be selected from the A time units, the sidelink channel busy ratio measurement value is determined as a default value.