Method and apparatus for partial sensing operation in sidelink communication

1 . A method of a transmitting user equipment (UE), the method comprising:

receiving, by a processor, from a base station, configuration information for additional partial sensing;

determining, by the processor, one or more candidate resources by performing a sensing operation in a sensing window;

identifying, by the processor, an occupancy state of at least one candidate resource among the one or more candidate resources by performing a partial sensing operation;

determining, by the processor, a first candidate resource among the one or more candidate resources as a transmission resource within a selection window in consideration of the occupancy state; and

performing, by the processor, sidelink communication with a receiving UE using the transmission resource,

wherein an additional partial sensing window is configured independently of an existing partial sensing window, and the partial sensing operation is performed on the at least one candidate resource, belonging to the additional partial sensing window, among the one or more candidate resources determined by the sensing operation, and

wherein the configuration information includes an enable indicator indicative of whether to configure the additional partial sensing window, the additional partial sensing window is not configured based on the enable indicator indicating a first value, and the additional partial sensing window is configured based on the enable indicator indicating a second value.

2 . The operation of claim 1 , wherein the additional partial sensing window is configured within a period [t y -P step , t y ], where t y is a start time of a specific candidate resource within the selection window, and P step is periodicity of the existing partial sensing window within the sensing window.

3 . The operation of claim 2 , wherein periodicity of the additional partial sensing window is set to be shorter than the P step .

4 . The operation of claim 1 , wherein the configuration information further includes at least one of a type 2-bitmap indicating a start time of the additional partial sensing window, information indicating a number of times of applying the type 2-bitmap, periodicity of the additional partial sensing window, or information of a scale for the periodicity.

5 . The operation of claim 4 , wherein when the number of times of applying the type 2-bitmap is N, a period [t y -P step , t y ], in which the additional partial sensing window is configured is divided into N sub-periods, and the type 2-bitmap is applied to each of the N sub-periods, N being a natural number.

6 . The operation of claim 4 , wherein the periodicity of the additional partial sensing window is inversely proportional to the number of times of applying the type 2-bitmap.

7 . The operation of claim 4 , wherein a size of the additional partial sensing window is determined according to a ratio of a first value or a second value in the type 2-bitmap.

8 . The operation of claim 1 , wherein periodicity of the additional partial sensing window is set differently for each subcarrier spacing.

9 . The operation of claim 1 , wherein a candidate resource occupied by another UE among the one or more candidate resources is not determined as the transmission resource.

10 . The operation of claim 9 , wherein the occupied candidate resource is a resource selected by a re-evaluation operation or a pre-emption operation.

11 . A transmitting user equipment (UE), the transmitting UE comprising:

a processor; and

a memory storing one or more instructions executable by the processor,

wherein the one or more instructions are executed to perform:

receiving, from a base station, configuration information of an for additional partial sensing;

determining one or more candidate resources by performing a sensing operation in a sensing window;

identifying an occupancy state of at least one candidate resource among the one or more candidate resources by performing a partial sensing operation based on the configuration information for the additional partial sensing;

determining a first candidate resource among the one or more candidate resources as a transmission resource within a selection window in consideration of the occupancy state; and

performing sidelink communication with a receiving UE using the transmission resource,

wherein an additional partial sensing window is configured independently of an existing partial sensing window, and the partial sensing operation is performed on the at least one candidate resource, belonging to the additional partial sensing window, among the one or more candidate resources determined by the sensing operation, and

wherein the configuration information includes an enable indicator indicative of whether to configure the additional partial sensing window, the additional partial sensing window is not configured based on the enable indicator indicating a first value, and the additional partial sensing window is configured based on the enable indicator indicating a second value.

12 . The UE of claim 11 , wherein the additional partial sensing window is configured within a period [t y -P step , t y ], where t y is a start time of a specific candidate resource within the selection window, P step is periodicity of existing partial sensing window within the sensing window, and periodicity of the additional partial sensing window is set to be shorter than the P step .

13 . The UE of claim 11 , wherein the configuration information further includes at least one of a type 2-bitmap indicating a start time of the additional partial sensing window, information indicating a number of times of applying the type 2-bitmap, periodicity of the additional partial sensing window, or information of a scale for the periodicity.

14 . The UE of claim 13 , wherein when the number of times of applying the type 2-bitmap is N, a period [t y -P step , t y ], in which the additional partial sensing window is configured is divided into N sub-periods, and the type 2-bitmap is applied to each of the N sub-periods, N being a natural number.

15 . The UE of claim 13 , wherein a size of the additional partial sensing window is determined according to a ratio of a first value or a second value in the type 2-bitmap.

16 . The UE of claim 11 , wherein periodicity of the additional partial sensing window is set differently for each subcarrier spacing.

17 . The UE of claim 11 , wherein a candidate resource occupied by another UE among the one or more candidate resources is not determined as the transmission resource, and the occupied candidate resource is a resource selected by a re-evaluation operation or a pre-emption operation.