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KR-20260064181-A - METHOD AND APPARATUS FOR MANAGING TXOP CONSIDERING DPS MODE IN WIRELESS LOCAL AREA NETWORK SYSTEM

KR20260064181AKR 20260064181 AKR20260064181 AKR 20260064181AKR-20260064181-A

Abstract

The present disclosure relates to an improved wireless LAN system. The present disclosure proposes a TXOP sharing method and apparatus considering DPS in an improved wireless LAN system. Specifically, the present disclosure discloses a method and apparatus performed by a first AP of a wireless LAN system, comprising the steps of: transmitting a first frame to notify a second AP of the sharing of a TXOP; receiving a second frame from the second AP that includes information regarding a DPS mode related to the TXOP and responds to the first frame; and transmitting a third frame to the second AP that includes information regarding a TXOP to be shared with the second AP.

Inventors

  • 하태영
  • 구종회
  • 김서욱
  • 변성호

Assignees

  • 삼성전자주식회사

Dates

Publication Date
20260507
Application Date
20241031

Claims (20)

  1. In a method performed by a first access point (AP) of a wireless local area network (WLAN) system, A step of transmitting a first frame to the second AP to notify the sharing of a TXOP (transmission opportunity); A step of receiving a second frame from the second AP for responding to the first frame, the second frame including information about a dynamic power save (DPS) mode related to the TXOP and information about the required TXOP length; and A method comprising the step of transmitting to the second AP a third frame containing information about a TXOP to be shared with the second AP.
  2. In paragraph 1, The above method is: When the above DPS mode is HCM (high capability mode), the step of transmitting a normal fourth frame to notify the second AP of the start of sharing of the TXOP; and A method comprising the step of transmitting a fourth frame including at least one of an intermediate frame check sequence (I-FCS) or padding to notify the second AP of the start of sharing of the TXOP when the above DPS mode is an LCM (low capability mode).
  3. In paragraph 2, The above method is: A method comprising the step of transmitting a frame to notify the third AP of the start of sharing of the TXOP or returning the TXOP when the above DPS mode is a doze mode.
  4. In paragraph 2, A method wherein the first frame includes a BSRP (buffer status report poll) trigger frame, the second frame includes an M-BA (multi station block ack) frame, the third frame includes a MU-RTS (multi user request to send) trigger frame, and the fourth frame includes a MU-RTS TXS (transmission opportunity sharing) trigger frame.
  5. In paragraph 1, A method in which the third frame includes scheduling information of the TXOP to be shared and an association identity (AID) for indicating the time required for data exchange with a station (STA) coupled to the first AP.
  6. In a method performed by a second AP of a wireless local area network (WLAN) system, A step of receiving a first frame from the first AP to notify the sharing of a TXOP (transmission opportunity); A step of transmitting to the first AP a second frame for responding to the first frame, the second frame including information regarding a dynamic power save (DPS) mode related to the TXOP and information regarding the required TXOP length; and A method comprising the step of receiving a third frame containing information about a TXOP to be shared with the second AP from the first AP.
  7. In paragraph 6, The above method is: When the above DPS mode is HCM (high capability mode), the step of receiving a normal fourth frame from the first AP to indicate the start of sharing of the TXOP; and A method comprising the step of receiving a fourth frame including at least one of an intermediate frame check sequence (I-FCS) or padding to signal the start of sharing of the TXOP from the first AP when the above DPS mode is an LCM (low capability mode).
  8. In Paragraph 7, A method in which, when the above DPS mode is a doze mode, a frame is received to indicate the start of sharing of the above TXOP after the above doze mode is terminated.
  9. In Paragraph 7, A method wherein the first frame includes a BSRP (buffer status report poll) trigger frame, the second frame includes an M-BA (multi station block ack) frame, the third frame includes a MU-RTS (multi user request to send) trigger frame, and the fourth frame includes a MU-RTS TXS (transmission opportunity sharing) trigger frame.
  10. In paragraph 6, A method in which the third frame includes scheduling information of the TXOP to be shared and an association identity (AID) for indicating the time required for data exchange with a station (STA) coupled to the first AP.
  11. In a first access point (AP) of a wireless local area network (WLAN) system, transceiver; and It includes at least one processor connected to the above-mentioned transmitting and receiving unit, and The above at least one processor is: Transmit a first frame to notify the second AP of the sharing of a TXOP (transmission opportunity), and Receive a second frame from the second AP for responding to the first frame, the second frame including information about the dynamic power save (DPS) mode related to the TXOP and information about the required TXOP length, and A first AP configured to transmit a third frame containing information about a TXOP to be shared with the second AP to the second AP.
  12. In Paragraph 11, The above at least one processor is: If the above DPS mode is HCM (high capability mode), a normal fourth frame is transmitted to the above second AP to notify the start of sharing of the above TXOP, and A first AP configured to transmit a fourth frame including at least one of an intermediate frame check sequence (I-FCS) or padding to notify the second AP of the start of sharing of the TXOP when the above DPS mode is LCM (low capability mode).
  13. In Paragraph 12, The above at least one processor is: A first AP configured to transmit a frame to notify the third AP of the start of sharing of the TXOP or to return the TXOP when the above DPS mode is a doze mode.
  14. In Paragraph 12, The first frame includes a BSRP (buffer status report poll) trigger frame, the second frame includes an M-BA (multi station block ack) frame, the third frame includes a MU-RTS (multi user request to send) trigger frame, and the fourth frame includes a MU-RTS TXS (transmission opportunity sharing) trigger frame, a first AP.
  15. In Paragraph 11, The first AP, wherein the third frame comprises scheduling information of the TXOP to be shared and an association identity (AID) for indicating the time required for data exchange with a station (STA) coupled to the first AP.
  16. In a second AP of a wireless local area network (WLAN) system, transceiver; and It includes at least one processor connected to the above-mentioned transmitting and receiving unit, and The above at least one processor is: Receive a first frame from the first AP to notify the sharing of a TXOP (transmission opportunity), and Transmitting a second frame to the first AP to respond to the first frame, the second frame including information about the dynamic power save (DPS) mode related to the TXOP and information about the required TXOP length. A second AP configured to receive a third frame containing information about a TXOP to be shared from the first AP to the second AP.
  17. In Paragraph 16, The above at least one processor is: When the above DPS mode is HCM (high capability mode), a normal fourth frame is received from the above first AP to indicate the start of sharing of the above TXOP, and A second AP configured to receive a fourth frame including at least one of an intermediate frame check sequence (I-FCS) or padding to signal the start of sharing of the TXOP from the first AP when the above DPS mode is LCM (low capability mode).
  18. In Paragraph 17, A second AP in which, when the above DPS mode is a doze mode, a frame is received to indicate the start of sharing of the above TXOP after the above doze mode has ended.
  19. In Paragraph 17, The first frame includes a BSRP (buffer status report poll) trigger frame, the second frame includes an M-BA (multi station block ack) frame, the third frame includes a MU-RTS (multi user request to send) trigger frame, and the fourth frame includes a MU-RTS TXS (transmission opportunity sharing) trigger frame, a second AP.
  20. In Paragraph 16, The third frame comprises a second AP including scheduling information of the TXOP to be shared and an association identity (AID) for indicating the time required for data exchange with a station (STA) coupled to the first AP.

Description

Method and apparatus for managing TXOP considering DPS mode in a wireless LAN system The present disclosure relates to a wireless local area network (WLAN) system. Specifically, the present disclosure relates to a method and apparatus for managing a transmission opportunity (TXOP) in consideration of a dynamic power save (DPS) mode in a wireless LAN system. Wireless LAN (WLAN) systems are evolving for various purposes, such as improving transmission rates, increasing bandwidth, enhancing reliability, reducing errors, and reducing latency. The Institute of Electrical and Electronics Engineers (IEEE) publishes the 802.11 standard specification for wireless LAN systems, and the technology described in the 802.11 standard specification can be referred to as WiFi (or Wi-Fi, Wireless Fidelity). Wi-Fi technology has evolved through several generations of 802.11 standards. For example, the 802.11ac standard covers improvements for VHT (very high throughput), the 802.11ax standard covers improvements for HE (high efficiency), and the 802.11be standard covers improvements for EHT (extreme high throughput). Meanwhile, technologies to provide an improved wireless communication environment in wireless LAN systems are being discussed, and various technologies are being proposed and researched in response to the demand to further enhance the reliability of wireless LAN systems. FIG. 1 illustrates the configuration of a device for wireless communication according to one embodiment of the present disclosure. FIG. 2 illustrates an exemplary structure of a wireless LAN system related to the present disclosure. FIG. 3 illustrates a link setup process related to the present disclosure. FIG. 4 illustrates a backoff operation related to the present disclosure. FIG. 5 illustrates a CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) based frame transmission operation related to the present disclosure. FIG. 6 illustrates an exemplary format of a frame used in a wireless LAN system related to the present disclosure. FIG. 7 illustrates an exemplary format of a PPDU (physical layer protocol data unit) of a wireless LAN system related to the present disclosure. FIG. 8 illustrates another exemplary format of a PPDU of a wireless LAN system related to the present disclosure. FIG. 9 is a diagram illustrating exemplary operations of C-TDMA (coordinated time division multiple access) of a wireless LAN system related to the present disclosure. FIG. 10 is a diagram illustrating the operation of C-TDMA (or TXS) according to one embodiment proposed in the present disclosure. FIG. 11 is a drawing illustrating the format structure of a frame according to one embodiment proposed in the present disclosure. FIG. 12 is a drawing illustrating the format structure of a frame according to one embodiment proposed in the present disclosure. FIG. 13 is a drawing illustrating the format structure of a frame according to one embodiment proposed in the present disclosure. FIG. 14 is a drawing illustrating the format structure of a frame according to one embodiment proposed in the present disclosure. FIG. 15 is a diagram illustrating C-TDMA (or TXS) operation considering DPS according to one embodiment proposed in the present disclosure. FIG. 16 is a diagram illustrating C-TDMA (or TXS) operation considering DPS according to one embodiment proposed in the present disclosure. FIG. 17 is a diagram illustrating C-TDMA (or TXS) operation considering DPS according to one embodiment proposed in the present disclosure. FIG. 18 is a diagram illustrating C-TDMA (or TXS) operation considering DPS according to one embodiment proposed in the present disclosure. FIG. 19 illustrates a flowchart relating to the operation of a first AP in a wireless LAN system according to one embodiment of the present disclosure. FIG. 20 illustrates a flowchart relating to the operation of a first AP in a wireless LAN system according to one embodiment of the present disclosure. FIG. 21 illustrates a flowchart relating to the operation of a second AP in a wireless LAN system according to one embodiment of the present disclosure. Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that identical components in the accompanying drawings are represented by the same reference numerals whenever possible. Furthermore, detailed descriptions of known functions and configurations that may obscure the essence of the present disclosure will be omitted. In describing the embodiments in this specification, descriptions of technical details that are well known in the technical field to which this disclosure belongs and are not directly related to this disclosure are omitted. This is intended to convey the essence of this disclosure more clearly without obscuring it by omitting unnecessary explanations. For the same reason, some components in the attached drawings have been exaggerated, omitted, or sch