Patent ID: 9622178
Date: 2017-04-11
CPC Classifications: H04L,H04W,Y02D

Claim:
1. A method of controlling timers in a wireless communication system including a first type network communicating based on a number of orthogonal frequency-division multiplexing (OFDM) symbols and a second type network being different from the first type network, the method performed by a user equipment (UE) and comprising: receiving an update message activating an idle mode signaling reduction (ISR) function of the UE; when the ISR function is activated in the UE, maintaining a periodic tracking area update (P-TAU) timer and a periodic routing area update (P-RAU) timer, wherein the P-TAU timer and the P-RAU timer run in the UE for updating a Mobility Management Entity (MME) and a Serving General packet radio service Support Node (SGSN) independently; and when the P-TAU timer expires and a mobility management backoff (MM-BO) timer is running, starting a deactivate ISR timer corresponding to the first type network, wherein the MM-BO timer is a timer configured to start when a MM-BO time value is received in the UE.