This application provides a communication method, a base station, and a terminal device. The communication method includes: obtaining, by a central unit (CU), a quality of service (QoS) parameter of a QoS data flow; mapping, by the CU, the QoS data flow to a bearer based on the QoS parameter of the QoS data flow; determining, by the CU, a QoS parameter of the bearer based on the QoS parameter of the QoS data flow; and sending, by the CU, the QoS parameter of the bearer to a distributed unit (DU). According to this application, the DU can schedule the bearer based on the QoS parameter of the bearer.