The network device 100 may be a base station, a core network device, a Transmission and Reception Point (TRP), a relay station, an access point, or the like. The network device 100 may be a Base Transceiver Station (BTS) in a Global System for Mobile (GSM) communications or a Code Division Multiple Access (CDMA) network, or may be a NodeB (NB) in Wideband Code Division Multiple Access (WCDMA), or may be an evolved NodeB (eNB or eNodeB) in Long-Term Evolution (LTE). The network device 100 may also be a radio controller in a Cloud Radio Access Network (CRAN) scenario. The network device 100 may also be a network device in a 5G communications system or a network device in a future evolved network. However, the used terms do not constitute a limitation on the present disclosure.