Method for efficiently performing coverage loss operation during sleep mode in a broadband wireless access system

摘要

A method for detecting coverage loss during a sleep mode of a mobile station and an apparatus for performing the same are disclosed. The method for detecting coverage loss of a mobile station, which is operated in a sleep mode, in a broadband wireless access system comprises the steps of awaking regardless of a sleep window of a sleep cycle at a first time when a super frame header (SFH) is transmitted from a serving base station; detecting the super frame header; and operating for the sleep window or listening window in accordance with the sleep cycle if the detected result is successful, and awaking until the super frame header is successfully detected if the detected result is failed.

主权项

1. A method for detecting coverage loss of a mobile station operated in a sleep mode, in a wireless access system, the method performed by the mobile station and comprising:
awaking just prior to a frame of a listening window followed by a sleep window of the sleep mode when a super frame header (SFH) is transmitted from a base station; staying awake until the super frame header is successfully detected during both the listening window and the sleep window when the detected result is a failure; and receiving uplink resource allocation information before an expiration of an active timer which is reset when the base station receives data from the mobile station, wherein when the mobile station is in the sleep mode, the mobile station receives the uplink resource allocation information at a listening window which is nearest to the expiration of the active timer.