Method and apparatus for accessing channel in WLAN system
First Claim
1. A method for performing channel access by a station (STA) in a wireless communication system, comprising:
- receiving, from an access point (AP), a first frame including a traffic indication map (TIM) and setting information of a time window during which a TIM mode STA is not allowed to perform the channel access; and
performing the channel access by transmitting a second frame based on the first frame,wherein the setting information comprises start time information of the time window and periodicity information of the time window,wherein the time window is repeated according to a cycle indicated by the periodicity information of the time window, andwherein an allowable transmission timing of the second frame within the cycle indicated by the periodicity information depends on whether the STA is the TIM mode STA or a non-TIM mode STA.
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Abstract
The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for accessing a channel in a WLAN system. A method for accessing the channel from a station (STA) in the wireless communication system, according to one embodiment of the present invention, comprises receiving from an access point (AP) setting information of a time window, which does not allow channel access of the STA in a traffic indication map (TIM) mode and which is repeatedly set in a cyclic manner; and carrying out the channel access on the basis of the time window, wherein the setting information includes starting point information of a specific time window and cycle information of the time window, wherein the time window is repeatedly set for every cycle that is indicated by the cycle information of the time window.
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Citations
17 Claims
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1. A method for performing channel access by a station (STA) in a wireless communication system, comprising:
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receiving, from an access point (AP), a first frame including a traffic indication map (TIM) and setting information of a time window during which a TIM mode STA is not allowed to perform the channel access; and performing the channel access by transmitting a second frame based on the first frame, wherein the setting information comprises start time information of the time window and periodicity information of the time window, wherein the time window is repeated according to a cycle indicated by the periodicity information of the time window, and wherein an allowable transmission timing of the second frame within the cycle indicated by the periodicity information depends on whether the STA is the TIM mode STA or a non-TIM mode STA. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for supporting channel access of at least one station (STA) by an access point (AP) in a wireless communication system, comprising:
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transmitting, to the at least one STA, a first frame including a traffic indication map (TIM) and setting information of a time window during which a TIM mode STA is not allowed to perform the channel access; and receiving a second frame from the at least one STA based on the first frame, wherein the setting information comprises start time information of the time window and periodicity information about the time window, wherein the time window is repeated according to a cycle indicated by the periodicity information, and wherein an allowable transmission timing of the second frame within the cycle indicated by the periodicity information depends on whether the at least one STA is the TIM mode STA or a non-TIM mode STA.
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16. A station (STA) for 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 access point (AP), a first frame including a traffic indication map (TIM) and setting information of a time window during which a TIM mode STA is not allowed to perform the channel access; and performs the channel access by controlling the transceiver to transmit a second frame based on the first frame, wherein the setting information comprises start time information and periodicity information of the time window, wherein the time window is repeated according to a cycle indicated by the periodicity information, and wherein an allowable transmission timing of the second frame within the cycle indicated by the periodicity information depends on whether the STA is the TIM mode STA or a non-TIM mode STA.
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17. An access point (AP) for supporting channel access of at least one station (STA) in a wireless communication system, comprising:
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a transceiver; and a processor that; controls the transceiver to transmit, to the at least one STA, a first frame including a traffic indication map (TIM) and setting information of a time window during which a TIM mode STA is not allowed to perform the channel access ; and controls the transceiver to receive a second frame from the at least one STA based on the first frame, wherein the setting information comprises start time information and periodicity information of the time window, wherein the time window is repeated according to a cycle indicated by the periodicity information, and wherein an allowable transmission timing of the second frame within the cycle indicated by the periodicity information depends on whether the at least one STA is the TIM mode STA or a non-TIM mode STA.
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Specification