A wireless communication method by a user equipment, UE, comprising: determining, by the UE based on a signaling from a base station, a combination of a listen before talk, LBT, type, a cyclic prefix, CP, extension, and a channel access priority class, CAPC, for an uplink transmission to the base station; wherein the signaling comprises a downlink control information, DCI, and a UE-specific radio resource control, RRC, signaling; wherein the DCI comprises an information field indicating the combination of the LBT type, the CP extension, and the CAPC; wherein the information field in the DCI comprises indexes indicating the combination of the LBT type, the CP extension, and the CAPC from a list of combinations of the LBT type, the CP extension, and the CAPC in the UE-specific RRC signaling; wherein the UE-specific RRC signaling indicates the list of combinations of the LBT type, the CP extension, and the CAPC from a first table; wherein the first table is predefined; characterized in that, the UE-specific RRC signaling further comprises a second table, wherein the second table comprises a portion of the combinations of the list of the combinations of the first table, and in that the determining further comprises: when the number of bits of the information field in the DCI is greater than a pre-defined threshold, determining the combination of LBT type, CP extension, and CAPC based on the predefined first table, and an entire number of bits of the information field in the DCI; when the number of bits of the information field in the DCI is less than the pre-defined threshold, determining the combination of LBT type, CP extension, and CAPC based on the second table, and a number of first bits of the information field in the DCI; wherein the entire number of bits is greater than the number of first bits. determining, by the UE based on a signaling from a base station, a combination of a listen before talk, LBT, type, a cyclic prefix, CP, extension, and a channel access priority class, CAPC, for an uplink transmission to the base station; wherein the signaling comprises a downlink control information, DCI, and a UE-specific radio resource control, RRC, signaling; wherein the DCI comprises an information field indicating the combination of the LBT type, the CP extension, and the CAPC; wherein the information field in the DCI comprises indexes indicating the combination of the LBT type, the CP extension, and the CAPC from a list of combinations of the LBT type, the CP extension, and the CAPC in the UE-specific RRC signaling; wherein the UE-specific RRC signaling indicates the list of combinations of the LBT type, the CP extension, and the CAPC from a first table; wherein the first table is predefined; characterized in that, the UE-specific RRC signaling further comprises a second table, wherein the second table comprises a portion of the combinations of the list of the combinations of the first table, and in that the determining further comprises: when the number of bits of the information field in the DCI is greater than a pre-defined threshold, determining the combination of LBT type, CP extension, and CAPC based on the predefined first table, and an entire number of bits of the information field in the DCI; when the number of bits of the information field in the DCI is less than the pre-defined threshold, determining the combination of LBT type, CP extension, and CAPC based on the second table, and a number of first bits of the information field in the DCI; wherein the entire number of bits is greater than the number of first bits. when the number of bits of the information field in the DCI is greater than a pre-defined threshold, determining the combination of LBT type, CP extension, and CAPC based on the predefined first table, and an entire number of bits of the information field in the DCI; when the number of bits of the information field in the DCI is less than the pre-defined threshold, determining the combination of LBT type, CP extension, and CAPC based on the second table, and a number of first bits of the information field in the DCI; wherein the entire number of bits is greater than the number of first bits.