A communication method carried out by a terminal device, comprising: receiving scheduling information from an access network device, wherein the scheduling information is used to indicate at least one uplink subframe, the scheduling information comprises a first indication field and a second indication field, the first indication field is used to indicate whether the terminal device enables a first mode, the second indication field is used to indicate whether the terminal device enables a second mode, the second mode is applicable to a first uplink subframe and the at least one uplink subframe comprises the first uplink subframe; when the first indication field indicates the terminal device to enable the first mode and the second indication field indicates the terminal device to enable the second mode, sending first uplink information in the first uplink subframe by using the second mode, wherein the sending first uplink information in the first uplink subframe by using the second mode comprises: starting to send the first uplink information in the 2 nd slot of the first uplink subframe, wherein the first uplink subframe is the 1 st uplink subframe in the at least one uplink subframe; or stopping sending the first uplink information in the 1 st slot of the first uplink subframe, wherein the first uplink subframe is the last uplink subframe in the at least one uplink subframe; and when the first indication field indicates the terminal device to enable the first mode and the second indication field indicates the terminal device to not enable the second mode, sending the first uplink information in the first uplink subframe by using the first mode, wherein the sending the first uplink information in the first uplink subframe by using the first mode comprises: determining, based on a channel listening result, that a starting moment for sending the first uplink information in the first uplink subframe is located in the 1 st slot of the first uplink subframe or the 2 nd slot of the first uplink subframe; and sending the first uplink information in the first uplink subframe. receiving scheduling information from an access network device, wherein the scheduling information is used to indicate at least one uplink subframe, the scheduling information comprises a first indication field and a second indication field, the first indication field is used to indicate whether the terminal device enables a first mode, the second indication field is used to indicate whether the terminal device enables a second mode, the second mode is applicable to a first uplink subframe and the at least one uplink subframe comprises the first uplink subframe; when the first indication field indicates the terminal device to enable the first mode and the second indication field indicates the terminal device to enable the second mode, sending first uplink information in the first uplink subframe by using the second mode, wherein the sending first uplink information in the first uplink subframe by using the second mode comprises: starting to send the first uplink information in the 2 nd slot of the first uplink subframe, wherein the first uplink subframe is the 1 st uplink subframe in the at least one uplink subframe; or stopping sending the first uplink information in the 1 st slot of the first uplink subframe, wherein the first uplink subframe is the last uplink subframe in the at least one uplink subframe; and when the first indication field indicates the terminal device to enable the first mode and the second indication field indicates the terminal device to not enable the second mode, sending the first uplink information in the first uplink subframe by using the first mode, wherein the sending the first uplink information in the first uplink subframe by using the first mode comprises: determining, based on a channel listening result, that a starting moment for sending the first uplink information in the first uplink subframe is located in the 1 st slot of the first uplink subframe or the 2 nd slot of the first uplink subframe; and sending the first uplink information in the first uplink subframe. starting to send the first uplink information in the 2 nd slot of the first uplink subframe, wherein the first uplink subframe is the 1 st uplink subframe in the at least one uplink subframe; or stopping sending the first uplink information in the 1 st slot of the first uplink subframe, wherein the first uplink subframe is the last uplink subframe in the at least one uplink subframe; and when the first indication field indicates the terminal device to enable the first mode and the second indication field indicates the terminal device to not enable the second mode, sending the first uplink information in the first uplink subframe by using the first mode, wherein the sending the first uplink information in the first uplink subframe by using the first mode comprises: determining, based on a channel listening result, that a starting moment for sending the first uplink information in the first uplink subframe is located in the 1 st slot of the first uplink subframe or the 2 nd slot of the first uplink subframe; and sending the first uplink information in the first uplink subframe. determining, based on a channel listening result, that a starting moment for sending the first uplink information in the first uplink subframe is located in the 1 st slot of the first uplink subframe or the 2 nd slot of the first uplink subframe; and sending the first uplink information in the first uplink subframe.