Method and apparatus for channel access in wireless LAN system
First Claim
1. A method for performing channel access by a station (STA) of a wireless communication system, comprising:
- receiving, from an access point (AP), information about a time window in which channel access of a traffic indication map (TIM) mode STA is not allowed; and
performing channel access on the basis of the time window,wherein channel access is performed in the time window when the STA corresponds to a non-TIM mode STA, andwherein channel access is performed in a time interval indicated by the TIM other than the time window when the STA corresponds to the TIM mode STA.
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Abstract
The present invention relates to a wireless communication system, and more particularly, to a method and an apparatus for accessing a channel in a wireless LAN system. According to one embodiment of the present invention, a method for performing channel access by a station (STA) of a wireless communication system comprises: a step of receiving, from an access point (AP), information about the time window which does not allow channel access of a traffic indication map (TIM) mode STA; and a step of performing channel access based on the time window. In the event that the STA is a non-TIM mode STA, the channel access is performed in the time window. In the event that the STA is a TIM mode STA, the channel access is performed in the time interval indicated by the TIM, excluding the time window.
12 Citations
15 Claims
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1. A method for performing channel access by a station (STA) of a wireless communication system, comprising:
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receiving, from an access point (AP), information about a time window in which channel access of a traffic indication map (TIM) mode STA is not allowed; and performing channel access on the basis of the time window, wherein channel access is performed in the time window when the STA corresponds to a non-TIM mode STA, and wherein channel access is performed in a time interval indicated by the TIM other than the time window when the STA corresponds to the TIM mode STA. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for supporting, by an AP, channel access of an STA in a wireless communication system, the method comprising:
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transmitting, to one or more STAs, information about a time window in which channel access of a TIM mode STA is not allowed; and operating in response to channel access of the one or more STAs on the basis of the time window, wherein channel access is performed in the time window when the STA corresponds to a non-TIM mode STA, and wherein channel access is performed in a time interval indicated by the TIM other than the time window when the STA corresponds to the TIM mode STA.
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14. An STA performing channel access in a wireless communication system, comprising:
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a transceiver; and a processor that; controls the transceiver to receive, from an AP, information about a time window in which channel access of a TIM mode STA is not allowed, and performs channel access on the basis of the time window, wherein channel access is performed in the time window when the STA corresponds to a non-TIM mode STA, and wherein channel access is performed in a time interval indicated by the TIM other than the time window when the STA corresponds to the TIM mode STA.
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15. An AP supporting channel access of an STA in a wireless communication system, comprising:
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a transceiver; and a processor that; controls the transceiver to transmit, to one or more STAs, information about a time window in which channel access of a TIM mode STA is not allowed, and operates in response to channel access of the one or more STAs on the basis of the time window, wherein channel access is performed in the time window when the STA corresponds to a non-TIM mode STA, and wherein channel access is performed in a time interval indicated by the TIM other than the time window when the STA corresponds to the TIM mode STA.
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Specification