METHOD FOR EFFICIENTLY PERFORMING COVERAGE LOSS OPERATION DURING SLEEP MODE IN A BROADBAND WIRELESS ACCESS SYSTEM
First Claim
1. A method for detecting coverage loss of a mobile station, which is operated in a sleep mode, in a broadband wireless access system, the method comprising:
- awaking at a first time point when a super frame header (SFH) is transmitted from a serving base station during a sleep mode operation;
detecting the super frame header; and
operating for a sleep window or a listening window in accordance with a sleep cycle of the sleep mode if the detected result is successful, and awaking until the super frame header is successfully detected if the detected result is failed.
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Accused Products
Abstract
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.
17 Citations
15 Claims
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1. A method for detecting coverage loss of a mobile station, which is operated in a sleep mode, in a broadband wireless access system, the method comprising:
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awaking at a first time point when a super frame header (SFH) is transmitted from a serving base station during a sleep mode operation; detecting the super frame header; and operating for a sleep window or a listening window in accordance with a sleep cycle of the sleep mode if the detected result is successful, and awaking until the super frame header is successfully detected if the detected result is failed. - View Dependent Claims (2, 3, 4, 5)
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6. A method for determining coverage loss of a mobile station, which is operated in a sleep mode, at a base station of a broadband wireless access system, the method comprising:
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transmitting first uplink resource allocation information (UL grant) to the mobile station at a listening window which is nearest to a time point of a first timer'"'"'s expiration, the first timer being managed by the base station for the mobile station; and resetting the first timer if a response signal is received from the mobile station through an uplink resource indicated by the first uplink resource allocation information and transmitting at least one second uplink resource allocation information to the mobile station until the response signal is received if the response signal is not received from the mobile station. - View Dependent Claims (7, 8, 9, 10)
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11. A mobile station apparatus of performing a sleep mode in a broadband wireless access system, the mobile station apparatus comprising:
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a processor; and a radio frequency (RF) module for transmitting and receiving a radio signal to and from the outside under the control of the processor, wherein the processor is configured to awake at a first time point when a super frame header (SFH) is transmitted from a serving base station during a sleep mode operation, detect the super frame header, operate for a sleep window or a listening window in accordance with a sleep cycle of the sleep mode if the detected result is successful, and awake until the super frame header is successfully detected if the detected result is failed. - View Dependent Claims (12, 13, 14, 15)
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Specification