A communication method and a communications apparatus are provided. The method includes determining, by an access network device, resource configuration information, where the resource configuration information indicates a resource used to transmit control information, and the resource indication uses a unit of a resource block group RBG. The method further includes sending, by the access network device, the resource configuration information to the terminal. The method includes receiving, by the terminal, the resource configuration information from the access network device. The method further includes transmitting, by the terminal, control information by using the resource indicated by the resource configuration information.