The network device 1200 may include one or more radio frequency units, for example, a remote radio unit (RRU) 121 and one or more baseband units (BBU) (which may also be referred to as a digital unit (DU)) 122. The RRU 121 may be referred to as a transceiver unit 121, and corresponds to the transceiver unit 1120 in FIG. 11. Optionally, the transceiver unit may be further referred to as a transceiver machine, a transceiver circuit, a transceiver, or the like, and may include at least one antenna 1211 and a radio frequency unit 1212. The RRU 121 is mainly configured to receive and send a radio frequency signal and perform conversion between a radio frequency signal and a baseband signal, for example, configured to send precoding matrix information to a terminal device. The BBU 122 is mainly configured to perform baseband processing, control the base station, and the like. The RRU 121 and the BBU 122 may be physically disposed together, or may be physically disposed separated, namely, a distributed base station. It may be understood that the transceiver unit may also be an interface circuit.
The BBU 122 is a control center of the base station, or may be referred to as a processing unit 122. The BBU 122 may correspond to the processing unit 1110 in FIG. 11, and is mainly configured to implement a baseband processing function, for example, channel coding, multiplexing, modulation, or spreading. For example, the BBU (the processing unit) may be configured to control the base station to perform an operation procedure related to the network device in the foregoing method embodiments.
