This application provides a communication method and apparatus. The method includes: A terminal receives first configuration information from a network device, and determines a time unit aggregation based on the first configuration information, where the time unit aggregation includes at least one time unit. The terminal receives control information from the network device, and determines at least one first time subunit and at least one second time subunit in the time unit aggregation based on the control information. The terminal receives, in the at least one first time subunit, data corresponding to a first transport block, and receives, in the at least one second time subunit, data corresponding to a second transport block.