Apparatus and method for controlling slot usage
First Claim
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1. A method for controlling channel access by an access point (AP) in a wireless local area network (WLAN), the method comprising:
- transmitting a synchronization frame that includes a receiver address (RA) field including an identification value indicating a first station (STA), wherein the synchronization frame is transmitted if a channel is in an idle state at a time point when the first STA wakes up, the time point corresponding to a target wake time (TWT) targeted to the first STA;
configuring a response waiting time; and
when a first contention free-End (CF-End) frame is received during the response waiting time, transmitting a second CF-End frame,wherein the first CF-End frame is transmitted by the first STA that has gained access to the channel and has no more data to transmit,wherein the synchronization frame is distinguished from a beacon frame, and is transmitted by the AP between beacon frames to allow the first STA to access the channel,wherein when a response frame in response to the synchronization frame is not received during the response waiting time, the AP transmits a third CF-End frame, andwherein the second and third CF-End frames are transmitted by the AP to reset a network allocation vector (NAV) of a STA receiving the second and third CF-End frames.
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Abstract
Provided is slot use control apparatus and method, including an access point (AP) to control a slotted channel access of a station (STA) in a wireless local area network (WLAN) includes generating a synchronization (synch) frame including an identification value indicating an STA allocated to a slot, and broadcasting the generated synch frame when a channel is in an idle state at a start point of the slot.
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Citations
10 Claims
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1. A method for controlling channel access by an access point (AP) in a wireless local area network (WLAN), the method comprising:
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transmitting a synchronization frame that includes a receiver address (RA) field including an identification value indicating a first station (STA), wherein the synchronization frame is transmitted if a channel is in an idle state at a time point when the first STA wakes up, the time point corresponding to a target wake time (TWT) targeted to the first STA; configuring a response waiting time; and when a first contention free-End (CF-End) frame is received during the response waiting time, transmitting a second CF-End frame, wherein the first CF-End frame is transmitted by the first STA that has gained access to the channel and has no more data to transmit, wherein the synchronization frame is distinguished from a beacon frame, and is transmitted by the AP between beacon frames to allow the first STA to access the channel, wherein when a response frame in response to the synchronization frame is not received during the response waiting time, the AP transmits a third CF-End frame, and wherein the second and third CF-End frames are transmitted by the AP to reset a network allocation vector (NAV) of a STA receiving the second and third CF-End frames. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus of an access point (AP) for controlling channel access in a wireless local area network (WLAN), the apparatus comprising:
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a receiver; a transmitter; and a processor, wherein the processor is configured to; cause the transmitter to transmit a synchronization frame that includes a receiver address (RA) field including an identification value indicating a first station (STA), wherein the synchronization frame is transmitted if a channel is in an idle state at a time point when the first STA wakes up, the time point corresponding to a target wake time (TWT) targeted to the first STA, configure a response waiting time; cause the receiver to receive a first contention free-End (CF-End) frame during the response waiting time, and cause the transmitter to transmit a second contention free-End (CF-End) frame when the first CF-End frame is received during the response waiting time, wherein the first CF-End frame is transmitted by the first STA that has gained access to the channel and has no more data to transmit, wherein the synchronization frame is distinguished from a beacon frame, and is transmitted by the AP between beacon frames to allow the first STA to access the channel, wherein when a response frame in response to the synchronization frame is not received during the response waiting time, the AP transmits a third CF-End frame, and wherein the second and third CF-End frames are transmitted by the AP to reset a network allocation vector (NAV) of a STA receiving the second and third CF-End frames.
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Specification