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KR-20260063066-A - METHOD AND APPARATUS FOR PERFORMING NPCA CONSIDERING TXOP IN WIRELESS LOCAL AREA NETWORK SYSTEM

KR20260063066AKR 20260063066 AKR20260063066 AKR 20260063066AKR-20260063066-A

Abstract

The present disclosure relates to an improved wireless LAN system. The present disclosure proposes a method and apparatus for considering NPCA in an improved wireless LAN system. Specifically, the present disclosure discloses a method and apparatus for receiving a first frame from a first AP to notify the sharing of the first AP's TXOP, transmitting a second frame to the first AP to respond to a TXS, and performing NPCA in a time interval determined based on at least one of the first frame and the second frame.

Inventors

  • 변성호
  • 김서욱
  • 김정준
  • 하태영

Assignees

  • 삼성전자주식회사

Dates

Publication Date
20260507
Application Date
20241030

Claims (20)

  1. In a method performed by a second access point (AP) of a wireless local area network (WLAN) system, A step of receiving a first frame from a first AP to notify the sharing of a TXOP (transmission opportunity) (TXOP sharing, TXS) of the first AP; The step of transmitting a second frame to the first AP to respond to the TXS; and A method comprising the step of performing non-primary channel access (NPCA) in a time interval determined based on at least one of the first frame and the second frame.
  2. In paragraph 1, The first frame is an initial control frame (ICF) and includes an association identity (AID) field of the second AP, an allocation duration field for the TXS, and a starting time field for the TXS, and The second frame is an ICR (initial control response) and includes a response field related to whether the TXS is approved, a channel field indicating the bandwidth in the TXS, and an NPCA field indicating whether to perform the NPCA in the interval excluding the TXS. A method in which, if the above response field indicates partial acceptance, the second frame further includes at least one of an alternate allocation duration field or an alternate start time field.
  3. In paragraph 2, The above ICF includes either a BSRP (buffer status report poll) trigger frame or a MU-RTS (multi-user request to send) frame, and The above ICR includes either an M-BA frame or a CTS (clear to send) frame, a method.
  4. In paragraph 1, A method in which the first AP is a sharing AP associated with the TXS, and the second AP is a shared AP associated with the TXS.
  5. In paragraph 1, The time interval during which the above NPCA is performed is the interval excluding the interval during which the above TXS is performed within the TXOP of the first AP, and A method in which the above NPCA is performed after transmitting the above second frame and before the time of transmitting the third frame to indicate the initiation of the above TXS.
  6. In a method performed by a STA (station) of a wireless local area network (WLAN) system, A step of receiving a first frame from a first AP to notify the sharing of a TXOP (transmission opportunity) (TXOP sharing, TXS) of the first AP to a second AP; A step of receiving a second frame from the second AP to respond to the TXS; and A method comprising the step of performing non-primary channel access (NPCA) in a time interval determined based on at least one of the first frame and the second frame.
  7. In paragraph 6, The first frame is an initial control frame (ICF) and includes an association identity (AID) field of the second AP, an allocation duration field for the TXS, and a starting time field for the TXS, and The second frame is an ICR (initial control response) and includes a response field related to whether the TXS is approved, a channel field indicating the bandwidth in the TXS, and an NPCA field indicating whether to perform the NPCA in the interval excluding the TXS. A method in which, if the above response field indicates partial acceptance, the second frame further includes at least one of an alternate allocation duration field or an alternate start time field.
  8. In Paragraph 7, The above ICF includes either a BSRP (buffer status report poll) trigger frame or a MU-RTS (multi-user request to send) frame, and The above ICR includes either an M-BA frame or a CTS (clear to send) frame, a method.
  9. In paragraph 6, A method in which the first AP is a sharing AP associated with the TXS, and the second AP is a shared AP associated with the TXS.
  10. In paragraph 6, The time interval during which the above NPCA is performed is the interval excluding the interval during which the above TXS is performed within the TXOP of the first AP, and A method in which the above NPCA is performed after receiving the above second frame and before the time of transmission of the third frame to indicate the initiation of the above TXS.
  11. In a second 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: Receive a first frame from the first AP to notify the sharing of the first AP's TXOP (transmission opportunity) (TXOP sharing, TXS), and Transmit a second frame to the first AP to respond to the TXS, and A second AP configured to perform non-primary channel access (NPCA) in a time interval determined based on at least one of the first frame and the second frame.
  12. In Paragraph 11, The first frame is an initial control frame (ICF) and includes an association identity (AID) field of the second AP, an allocation duration field for the TXS, and a starting time field for the TXS, and The second frame is an ICR (initial control response) and includes a response field related to whether the TXS is approved, a channel field indicating the bandwidth in the TXS, and an NPCA field indicating whether to perform the NPCA in the interval excluding the TXS. If the above response field indicates partial acceptance, the second frame further includes at least one of an alternate allocation duration field or an alternate start time field, a second AP.
  13. In Paragraph 12, The above ICF includes either a BSRP (buffer status report poll) trigger frame or a MU-RTS (multi-user request to send) frame, and The above ICR is a second AP including either an M-BA frame or a CTS (clear to send) frame.
  14. In Paragraph 11, The first AP is a sharing AP associated with the TXS, and the second AP is a shared AP associated with the TXS, wherein the second AP is a shared AP associated with the TXS.
  15. In Paragraph 11, The time interval during which the above NPCA is performed is the interval excluding the interval during which the above TXS is performed within the TXOP of the first AP, and The second AP, wherein the above NPCA is performed after transmitting the above second frame and before the time of transmitting the third frame to indicate the initiation of the above TXS.
  16. In a STA (station) 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) (TXOP sharing, TXS) of the first AP to the second AP, and Receive a second frame from the second AP to respond to the TXS, and STA configured to perform non-primary channel access (NPCA) in a time interval determined based on at least one of the first frame and the second frame.
  17. In Paragraph 16, The first frame is an initial control frame (ICF) and includes an association identity (AID) field of the second AP, an allocation duration field for the TXS, and a starting time field for the TXS, and The second frame is an ICR (initial control response) and includes a response field related to whether the TXS is approved, a channel field indicating the bandwidth in the TXS, and an NPCA field indicating whether to perform the NPCA in the interval excluding the TXS. If the above response field indicates partial acceptance, the STA further includes at least one of an alternate allocation duration field or an alternate start time field.
  18. In Paragraph 17, The above ICF includes either a BSRP (buffer status report poll) trigger frame or a MU-RTS (multi-user request to send) frame, and The above ICR is an STA containing either an M-BA frame or a CTS (clear to send) frame.
  19. In Paragraph 16, STA, wherein the first AP is a sharing AP associated with the TXS, and the second AP is a shared AP associated with the TXS.
  20. In Paragraph 16, The time interval during which the above NPCA is performed is the interval excluding the interval during which the above TXS is performed within the TXOP of the first AP, and The above NPCA is performed after receiving the above second frame and before the time of transmission of the third frame to indicate the initiation of the above TXS, STA.

Description

Method and apparatus for performing NPCA considering TXOP sharing 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 non-primary channel access (NPCA) operation 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 illustrates an exemplary structure of a frame for TXOP (transmission opportunity) sharing (TXOP sharing, TXS) related to the present disclosure. FIG. 11 is a drawing illustrating the meaning represented by a specific field included in a frame for TXOP sharing related to the present disclosure. FIG. 12 illustrates an exemplary format structure of a specific field included in a frame for TXOP sharing related to the present disclosure. FIG. 13 illustrates an exemplary format structure of a frame for responding to a TXOP sharing related to the present disclosure. FIG. 14 is a diagram illustrating the meaning represented by a specific field included in a frame for responding to a TXOP sharing related to the present disclosure. FIG. 15 illustrates the configuration of a primary channel and a secondary channel of a wireless LAN system related to the present disclosure. FIG. 16 illustrates the configuration of a primary channel and a secondary channel of a wireless LAN system related to the present disclosure. FIG. 17 is a diagram illustrating non-primary channel access (NPCA) in a wireless LAN system related to the present disclosure. FIG. 18 is a diagram illustrating an NPCA in a wireless LAN system related to the present disclosure. FIG. 19 illustrates an exemplary structure of the format of a specific field included in a frame for TXOP sharing related to the present disclosure. FIG. 20 illustrates an exemplary structure of the format of a specific field included in a frame for responding to a TXOP sharing related to the present disclosure. FIG. 21 illustrates an exemplary structure of the format of a specific field included in a frame for responding to a TXOP sharing related to the present disclosure. FIG. 22 illustrates an exemplary structure of the format of a specific field included in a frame for responding to a TXOP sharing related to the present disclosure. FIG. 23 is a diagram illustrating an example of a procedure of NPCA considering TXOP sharing related to the present disclosure. FIG. 24 is a diagram illustrating another example of an NPCA procedure considering TXOP sharing related to the present disclosure. FIG. 25 illustrates a flowchart of operations related to TXOP sharing of a first AP in a wireless LAN system according to one embodiment of the present disclosure. FIG. 26 illustrates a flowchart of operations related to TXOP sharing and NPCA of a second AP in a wireless LAN system according to one embodiment of the present disclosure. FIG. 27 illustrates a flowchart of operations related to TXOP sharing and NPCA of