Transmission method and device based on preamble puncturing in wireless LAN system
A transmission method and device based on preamble puncturing in a wireless LAN system are disclosed. A method by which a first STA performs communication in a wireless LAN system, according to one embodiment of the present disclosure, comprises the steps of: receiving a first PPDU from a second STA; acquiring information related to at least one first punctured resource unit; and transmitting, in response to the first PPDU, to the second STA, a second PPDU based on at least one second punctured resource unit, wherein the at least one first punctured resource unit can be at least one part of the at least one second punctured resource unit.
1 . A method comprising:
receiving, by a first station (STA), a first physical layer protocol data unit (PPDU) from a second STA;
obtaining, by the first STA, information related to at least one first punctured subchannel included in the first PPDU; and
in response to the first PPDU, transmitting, by the first STA to the second STA, a second PPDU over at least one subchannel, excluding at least one second punctured subchannel,
wherein a size of the at least one second punctured subchannel is equal to or bigger than a size of the at least one first punctured subchannel, and
wherein, based on the second PPDU being an extremely high throughput (EHT) multi-user (MU) PPDU format, a universal-signal (U-SIG) field of the second PPDU includes information related to the at least one second punctured subchannel.
2 . The method of claim 1 , wherein:
the first STA is a non-access point (AP) STA,
the second STA is an AP, and
information related to the at least one first punctured subchannel is transmitted to the first STA through the first PPDU or a management frame.
3 . The method of claim 1 , wherein:
the first STA is a transmission opportunity (TXOP) holder, and
the second STA is a TXOP responder.
4 . The method of claim 3 , wherein:
at least one of the first STA or the second STA receives a disabled subchannel bitmap from an AP through a management frame, and
the disabled subchannel bitmap includes information related to the first punctured subchannel.
5 . The method of claim 3 , wherein:
information related to whether to allow transmission of the second PPDU based on the at least one subchannel except for at least one second punctured subchannel is transmitted from the second STA to the first STA.
6 . The method of claim 1 , wherein:
based on the first PPDU being an extremely high throughput (EHT) multi-user (MU) PPDU format, a universal (U)-signal field of the first PPDU includes information related to the at least one first punctured subchannel.
7 . The method of claim 1 , wherein:
based on at least one of the first PPDU or the second PPDU being based on a non-high throughput (HT) duplicate (DUP) format, information related to the at least one first punctured subchannel is included in a first 7 bits of a scrambling sequence of a service field in the first PPDU, and
information related to the at least one second punctured subchannel is included in a first 7 bits of a scrambling sequence of a service field in the second PPDU.
8 . The method of claim 1 , wherein:
the at least one first punctured subchannel or the at least one second punctured subchannel is included in an HT-control field included in each of the first PPDU or the second PPDU.
9 . A first station (STA) comprising:
at least one transceiver; and
at least one processor coupled to the one or more transceivers;
wherein the at least one processor is configured to:
receive, through the at least one transceiver, a first physical layer protocol data unit (PPDU) from a second STA;
obtain information related to at least one first punctured subchannel included in the first PPDU; and
in response to the first PPDU, transmitting, to the second STA through the at least one transceiver, a second PPDU over at least one subchannel, excluding at least one second punctured subchannel,
wherein a size of the at least one second punctured subchannel is equal to or bigger than a size of the at least one first punctured subchannel, and
wherein, based on the second PPDU being an extremely high throughput (EHT) multi-user (MU) PPDU format, a universal-signal (U-SIG) field of the second PPDU includes information related to the at least one second punctured subchannel.
10 . A second station (STA) comprising:
at least one transceiver; and
at least one processor coupled to the one or more transceivers;
wherein the at least one processor is configured to:
transmit, to a first STA through the at least one transceiver, a first physical layer protocol data unit (PPDU) including information related to at least one first punctured subchannel; and
receive, from the first STA through the at least one transceiver, a second PPDU over at least one second punctured subchannel, excluding at least one second punctured subchannel, in response to the first PPDU,
wherein a size of the at least one second punctured subchannel is equal to or bigger than a size of the at least one first punctured subchannel, and
wherein, based on the second PPDU being an extremely high throughput (EHT) multi-user (MU) PPDU format, a universal-signal (U-SIG) field of the second PPDU includes information related to the at least one second punctured subchannel.