EP-4742806-A1 - COMMUNICATION METHOD AND DEVICE USING PREEMPTION IN WIRELESS LAN SYSTEM

Abstract

In order to perform communication using preemption in a wireless LAN system, a method of operating a STA (station) comprises acquiring at least some of parameters of a first frame based on the first frame, acquiring a preemption indicator from a second frame including the preemption indicator, transmitting a third frame indicating a preemption operation based on the preemption indicator, receiving a fourth frame indicating resources allocated for the preemption operation, and transmitting preemption data based on the resources. The parameters of the first frame and parameters of the third frame have the same value.

Inventors

• KIM, YONG HO
• AHN, WOO JIN
• MOON, Ju Seong
• LEE, GWANG HO

Assignees

• Hyundai Motor Company
• Kia Corporation
• Korea National University of Transportation Industry-Academic Cooperation Foundation

Dates

Publication Date

20260513

Application Date

20240819

Claims (19)

1. A method of operating a STA (station) in a wireless LAN system, the method comprising: acquiring at least some of parameters of a first frame based on the first frame; acquiring a preemption indicator from a second frame including the preemption indicator; transmitting a third frame indicating a preemption operation based on the preemption indicator; receiving a fourth frame indicating resources allocated for the preemption operation; and transmitting preemption data based on the resources, wherein the parameters of the first frame and parameters of the third frame have the same value.
2. The method of claim 1, wherein the third frame is transmitted using at least one subchannel or subcarrier, and wherein the at least one subchannel or subcarrier is determined according to priority of the preemption data.
3. The method of claim 2, wherein at least one of a bandwidth or number of the at least one subchannel or subcarrier is determined according to the priority of the preemption data.
4. The method of claim 1, wherein the third frame includes at least one of a PR frame, an S-CTS frame, or an NDP feedback report.
5. The method of claim 1, wherein the resources include at least one subchannel or subcarrier and are allocated based on priority of the preemption data.
6. The method of claim 1, wherein a frame including the preemption indicator includes an NFRP (NDP feedback report poll) trigger frame.
7. The method of claim 6, wherein the NFRP trigger frame is received using resources indicated by a broadcast AID of the frame including the preemption indicator.
8. The method of claim 6, wherein the preemption indicator includes the NFRP trigger frame, and wherein a feedback type of the NFRP trigger frame is a type for a preemption operation.
9. The method of claim 1, wherein the third frame is a frame transmitted to an STA that does not have the preemption data.
10. A method of operating an access point (AP) in a wireless LAN system, the method comprising: transmitting a first frame; transmitting a second frame including a preemption indicator; receiving a third frame indicating a preemption operation based on the preemption indicator; transmitting a fourth frame indicating resources allocated for the preemption operation; and receiving preemption data based on the resources, wherein the first frame and the third frame include parameters having the same value.
11. The method of claim 10, wherein the second frame is received using at least one subchannel or subcarrier, and wherein the at least one subchannel or subcarrier is determined according to priority of the preemption data.
12. The method of claim 11, wherein at least one of a bandwidth or number of the at least one subchannel or subcarrier is determined according to the priority of the preemption data.
13. The method of claim 10, wherein the second frame includes at least one of a PR frame, an S-CTS frame, or an NDP feedback report.
14. The method of claim 10, wherein the resources include at least one subchannel or subcarrier and are allocated based on priority of the preemption data.
15. The method of claim 10, wherein the second frame includes an NFRP (NDP feedback report poll) trigger frame.
16. The method of claim 15, wherein the NFRP trigger frame is received using resources indicated by a broadcast AID of the frame including the preemption indicator.
17. The method of claim 16, wherein the preemption indicator includes the NFRP trigger frame, and wherein a feedback type of the NFRP trigger frame is a type for a preemption operation.
18. A station (STA) in a wireless LAN system, the STA comprising: a transceiver; and a processor connected to the transceiver, wherein the processor is configured to: acquire at least some of parameters of a first frame based on the first frame; acquire a preemption indicator from a second frame including the preemption indicator; transmit a third frame indicating a preemption operation based on the preemption indicator; receive a fourth frame indicating resources allocated for the preemption operation; and transmit preemption data based on the resources, wherein the parameters of the first frame and parameters of the third frame have the same value.
19. An access point (AP) in a wireless LAN system, the AP comprising: a transceiver; and a processor connected to the transceiver, wherein the processor is configured to: transmit a first frame; transmit a second frame including a preemption indicator; receive a third frame indicating a preemption operation based on the preemption indicator; transmit a fourth frame indicating resources allocated for the preemption operation; and receive preemption data based on the resources, wherein the first frame and the third frame include parameters having the same value.

Description

Technical Field The present invention relates to a wireless local area network (WLAN) system, and more particularly, to a communication method and device using preemption in a wireless LAN system. Background Art Recently, as the spread of mobile devices expands, a wireless local area network technology capable of providing fast wireless communication services to mobile devices is in the spotlight. The wireless local area network (LAN) technology may be a technology that supports mobile devices such as smart phones, smart pads, laptop computers, portable multimedia players, embedded devices, and the like to wirelessly access the Internet based on wireless communication technology. As applications requiring higher throughput and applications requiring real-time transmission occur, an expanded frequency bandwidth and/or an efficient retransmitting operation may be supported in a WLAN. In addition, an operation of simultaneously using multiple links or links may be supported. Meanwhile, the technologies that are described in the Background section are written to improve the understanding of the background of the present disclosure and may include content that is not already known to those of ordinary skill in the art to which the present disclosure belongs. Description of Invention Technical Problem The present disclosure provides a method and device for performing communication using preemption in a wireless local area network (WLAN) system. The present disclosure provides a method and device for exchanging data during preemption operation within a transmit opportunity (TXOP) in a WLAN system. The present disclosure provides a method and device for performing preemption between interframe spaces transmitted by other terminals in a WLAN system. The present disclosure provides a method and device for controlling preemption operations in a wireless LAN system. The present disclosure provides a method and device for controlling interframe spaces during preemption operations in a wireless LAN system. Technical objects to be achieved in the present disclosure are not limited to what is mentioned above, and other technical objects not mentioned therein can be considered from the embodiments of the present disclosure to be described below by those skilled in the art to which a technical configuration of the present disclosure is applied. Technical Solution According to an embodiment of the present disclosure, a method of operating a STA (station) in a wireless LAN system may comprise acquiring at least some of parameters of a first frame based on the first frame, acquiring a preemption indicator from a second frame including the preemption indicator, transmitting a third frame indicating a preemption operation based on the preemption indicator, receiving a fourth frame indicating resources allocated for the preemption operation, and transmitting preemption data based on the resources. The parameters of the first frame and parameters of the third frame have the same value. According to an embodiment of the present disclosure, a method of operating an access point (AP) in a wireless LAN system may comprise transmitting a first frame, transmitting a second frame including a preemption indicator, receiving a third frame indicating a preemption operation based on the preemption indicator, transmitting a fourth frame indicating resources allocated for the preemption operation, and receiving preemption data based on the resources. The first frame and the third frame include parameters having the same value. According to an embodiment of the present disclosure, a station (STA) in a wireless LAN system may comprise a transceiver and a processor connected to the transceiver. The processor may acquire at least some of parameters of a first frame based on the first frame, acquire a preemption indicator from a second frame including the preemption indicator, transmit a third frame indicating a preemption operation based on the preemption indicator, receive a fourth frame indicating resources allocated for the preemption operation, and transmit preemption data based on the resources. The parameters of the first frame and parameters of the third frame have the same value. According to an embodiment of the present disclosure, an access point (AP) in a wireless LAN system may comprise a transceiver and a processor connected to the transceiver. The processor may transmit a first frame, transmit a second frame including a preemption indicator, receive a third frame indicating a preemption operation based on the preemption indicator, transmit a fourth frame indicating resources allocated for the preemption operation and receive preemption data based on the resources. The first frame and the third frame include parameters having the same value. Advantageous Effects According to the present disclosure, a preemption operation can be performed. According to the present disclosure, an interframe space for the preemption operation can be contr