Embodiments of the present disclosure relate to determination of terminal device's identify. A terminal device determines an identity (ID) of the terminal device based on configuration status of extended Discontinuous Reception (eDRX) and current Radio Resource Control (RRC) state of the terminal device; and determines one or both of paging frame (PF) and paging occasion (PO) based on the determined ID of the terminal device. In this way, paging in the eDRX can work well in RRC idle state or RRC inactive state, and the network and the UE may be synchronized with UE's PF and PO for paging in the eDRX.