Operation of a user equipment (UE) with various timers is disclosed. According to this scheme, when the UE receives values for each of timers related with a discontinuous reception (DRX) operation from a network, the UE monitors a physical downlink control channel (PDCCH) from subframe n+1 to subframe n+X based on a first timer among the above mentioned timers, when a first event for starting the first timer occurs at the subframe n, and monitors the PDCCH from subframe n to subframe n+X−1 based on a second timer among said timers, when a second event for starting the second timer occurs at the subframe n.