CN-122029932-A - Apparatus and method for fast error recovery in wireless local area network system

Abstract

A method for operating an Access Point (AP) in a wireless local area network system for fast error recovery in the wireless local area network system includes receiving a plurality of frames from a STA, detecting an error of at least one frame of the plurality of frames, transmitting a retransmission request based on the frame detected the error, and receiving a retransmission frame based on the retransmission request, wherein the retransmission frame includes the frame detected the error and the retransmission frame is received on a link on which the retransmission request was transmitted.

Inventors

• JIN LONGHAO
• An Youzhen
• Wen Zhucheng
• LI GUANGHAO

Assignees

• 现代自动车株式会社
• 起亚株式会社
• 韩国交通大学校产学协力团

Dates

Publication Date

20260512

Application Date

20240913

Priority Date

20230913

Claims (18)

1. 1.A method for operating an Access Point (AP) in a wireless local area network system, comprising: receiving a plurality of frames from a Station (STA); detecting an error in at least one of the plurality of frames; transmitting a retransmission request based on the frame in which the error is detected, and Based on the retransmission request, a retransmission frame is received, Wherein the retransmission frame includes a frame in which an error is detected, and Wherein a retransmission frame is received on a link on which a retransmission request was sent.
2. 2. The method of claim 1, wherein the retransmission request comprises at least one of TID of frame detected error, SN of frame detected error, resources used to transmit retransmission frame, or AID of STA.
3. 3. The method of claim 1, wherein the retransmission request is sent using a response frame, a trigger frame, or a MU-RTS frame.
4. 4. A method according to claim 3, wherein when a trigger frame is used to transmit a retransmission request, the trigger frame completes transmission simultaneously with a response frame.
5. 5. The method of claim 4, wherein the trigger frame includes padding for completing transmission simultaneously with a response frame.
6. 6. The method of claim 1, further comprising performing a channel access procedure for transmitting a retransmission request, Wherein the retransmission request is sent after the channel access procedure and the reception of the plurality of frames are completed.
7. 7. The method of claim 6, wherein the retransmission request is transmitted after a time for the STA to switch to the listening mode has elapsed.
8. 8. The method according to claim 1, Wherein each of the plurality of frames includes a priority, an Wherein a retransmission frame is received based on the priority.
9. 9. A method for operating a Station (STA) in a wireless local area network system, comprising: transmitting a plurality of frames to an Access Point (AP); Receiving a retransmission request based on a frame of the plurality of frames in which an error is detected, and Based on the retransmission request, a retransmission frame is sent, Wherein the retransmission frame includes a frame in which an error is detected, and Wherein the retransmission frame is sent on the link on which the retransmission request was received.
10. 10. The method of claim 9, wherein the retransmission request comprises at least one of TID of frame detected error, SN of frame detected error, resources used to transmit retransmission frame, or AID of STA.
11. 11. The method of claim 9, wherein the retransmission request is received using a response frame, a trigger frame, or a MU-RTS frame.
12. 12. The method of claim 11, wherein when a trigger frame is used to receive a retransmission request, the trigger frame completes reception simultaneously with a response frame.
13. 13. The method of claim 12, wherein the trigger frame or response frame includes padding for completing reception simultaneously with the response frame or trigger frame.
14. 14. The method of claim 9, wherein the retransmission request is received after transmission of the plurality of frames is completed.
15. 15. The method of claim 14, further comprising switching to a listening mode after receiving a response frame to the plurality of frames, Wherein the retransmission request is received after a time for switching to the listening mode has elapsed.
16. 16. The method according to claim 9, wherein the method comprises, Wherein each of the plurality of frames includes a priority, an Wherein the retransmission frame is sent based on the priority.
17. 17. An Access Point (AP) in a wireless local area network system, comprising: transceiver, and A processor connected to the transceiver, Wherein the processor is configured to: receiving a plurality of frames from a Station (STA); detecting an error in at least one of the plurality of frames; transmitting a retransmission request based on the frame in which the error is detected, and Based on the retransmission request, a retransmission frame is received, Wherein the retransmission frame includes a frame in which an error is detected, and Wherein a retransmission frame is received on a link on which a retransmission request was sent.
18. 18. A Station (STA) in a wireless local area network system, comprising: transceiver, and A processor connected to the transceiver, Wherein the processor is configured to: transmitting a plurality of frames to an Access Point (AP); Receiving a retransmission request based on a frame of the plurality of frames in which an error is detected, and Based on the retransmission request, a retransmission frame is sent, Wherein the retransmission frame includes a frame in which an error is detected, and Wherein the retransmission frame is sent on the link on which the retransmission request was received.

Description

Apparatus and method for fast error recovery in wireless local area network system Technical Field The present invention relates to a wireless local area network (wireless local area network) system, and more particularly, to an apparatus and method for fast error recovery in a wireless local area network system. Background Recently, as mobile devices are popular, wireless local area network technology capable of providing a rapid wireless communication service to the mobile devices has received attention. Wireless local area network technology may be technology that supports mobile devices (e.g., smart phones, smart tablets, laptops, portable multimedia players, embedded devices, etc.) wirelessly accessing the internet based on wireless communication technology. Standards for wireless lan technology were developed primarily by the Institute of Electrical and Electronics Engineers (IEEE) of ELECTRICAL AND Electronics Engineers as the IEEE 802.11 standard. As the above wireless lan technology has been developed and has become popular, applications using the wireless lan technology have been diversified, thereby creating a demand for wireless lan technology supporting higher reliability. With the advent of applications requiring higher reliability, the IEEE 802.11bn standard is being developed as an ultra-high reliability (Ultra High Reliability, UHR) wireless local area network technology in a single Basic service set (Basic SERVICE SET, BSS) and/or redundant BSS environment. The goal of the IEEE 802.11bn standard is to support higher data transmission rates, improved latency performance, and lower data error rates. In addition, the IEEE 802.11bn standard may support low power operation and peer-to-peer communication (peer-to-peer communication). The method of recovering from errors occurring in frames in a wireless local area network may need improvement. When multiple frames are combined and transmitted, some frames with errors may not be recovered until all frames have been sent and an acknowledgement of the error has been received. Errors may not be recovered quickly because an acknowledgement of a frame with an error may be received only after all frames are sent. In other words, the requirements for low latency communications may not be met. On the other hand, the techniques described in the background section are written to enhance understanding of the background of the invention and may include what is not yet known to a person of ordinary skill in the art to which the invention pertains. Disclosure of Invention Technical problem A method and apparatus for detecting and reporting errors in frames received by an Access Point (AP) in a wireless local area network system are provided. The present invention provides a method and apparatus for enabling a Station (STA) to quickly recover frames in which errors are detected in a wireless local area network system. The present invention provides a method and apparatus for enabling an AP and an STA using a non-simultaneous transmit/receive (NSTR) link pair to report and recover from errors in a frame using at least one link in a wireless local area network system. The invention also provides a method and a device for transmitting the frame of which the retransmission request detects the error in the wireless local area network system. Technical objects to be achieved in the present invention are not limited to the above-described objects, and other technical objects not mentioned may be considered from the embodiments of the present invention described below by those skilled in the art to which the technical configuration of the present invention is applied. Technical proposal A method for operating an Access Point (AP) in a wireless local area network system may include receiving a plurality of frames from a Station (STA), detecting an error in at least one of the plurality of frames, transmitting a retransmission request based on the frame in which the error was detected, and receiving a retransmission frame based on the retransmission request. The retransmission frame includes a frame in which an error is detected, and is received on a link on which a retransmission request is transmitted. A method for operating a Station (STA) in a wireless local area network system may include transmitting a plurality of frames to an Access Point (AP), receiving a retransmission request based on a frame of the plurality of frames in which an error is detected, and transmitting a retransmission frame based on the retransmission request. The retransmission frames include frames in which errors were detected, and are sent on the link on which the retransmission request was received. An Access Point (AP) in a wireless local area network system may include a transceiver and a processor coupled to the transceiver. The processor is configured to receive a plurality of frames from a Station (STA), detect an error in at least one of the plurality of frames, transmit a retransmiss