Patent ID: 9397797
Filing Date: 2016-07-19
CPC Classification: H04L,H04W,Y02D

Claim Text:
1. A method for controlling a sleep mode by a Mobile Station (MS) the method comprising: starting a timer for a listening window corresponding to a listening state if the MS receives first resource allocation information indicating a first resource for data communication to the MS by a Base Station (BS); communicating first data with the BS on the first resource indicated by the first resource allocation information; restarting the timer in order to extend the listening window, if the MS receives second resource allocation information indicating a second resource for data communication to the MS by the BS; maintaining the listening state by extending the listening window until the timer expires; communicating second data with the BS on the second resource indicated by the second resource allocation information; and transitioning to a sleep state if the timer expires, wherein the MS operates a sleep cycle comprising the listening window and a sleep window corresponding to the sleep state, and wherein a length of the sleep cycle is changed to double a length of a previous sleep cycle, if there is no data traffic between the MS and the BS during a previous listening window included in the previous sleep cycle or if a negative indication is included in traffic indication information received from the BS, and wherein a length of the listening window included in the sleep cycle is the same as the previous listening window.