1. A method of communicating data between a radio resource control (RRC) of a user equipment (UE) and a non-access stratum (NAS) of the UE, the method perform by the UE in a wireless communication system using a number of orthogonal frequency division multiplexing (OFDM) symbols and comprising: receiving, by the RRC of the UE, an RRC message including a first time value for an extended wait time from a base station; adjusting, by the RRC of the UE, the first time value to a second time value when the first time value does not fall within a range of a time value for a mobility management (MM) back-off timer, wherein the second time value falls within the range of the time value for the MM back-off timer; and forwarding, by RRC of the UE, the second time value to the NAS of the UE for enabling the NAS of the UE to apply the second time value to the MM back-off timer.