The technology of this application relates to a communication method, a communication apparatus, and a system. A first terminal receives first indication information from an access network device, where the first indication information indicates to enable aggregated transmission or indicates to disable the aggregated transmission, the aggregated transmission includes first data transmission that is performed with the access network device through a first terminal device and a second terminal device, first data includes first sub-data and second sub-data; and enables or disables the aggregated transmission based on the first indication information. In a possible embodiment of this application, the first terminal may dynamically enable or disable aggregated transmission based on an indication of the access network device.