1. A data sending method, implemented by an apparatus, the method comprising:determining an interlace scheduled for the apparatus, wherein the interlace is within a bandwidth;
performing clear channel assessment (CCA) channel detection on the interlace without performing CCA channel detection on any other portion of the bandwidth to obtain a channel energy value for the interlace;
determining whether the channel energy value is less than a preset energy threshold; and
sending uplink data to a base station on the interlace in response to the channel energy value for the interlace being less than the preset energy threshold.