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EP-4199399-B1 - METHOD FOR PACKAGE EXTENSION, DEVICE, AND STORAGE MEDIUM

EP4199399B1EP 4199399 B1EP4199399 B1EP 4199399B1EP-4199399-B1

Inventors

  • HU, Mengshi
  • YU, JIAN
  • GAN, Ming

Dates

Publication Date
20260506
Application Date
20220328

Claims (10)

  1. A communication method performed by an access device (210, 1020), the method comprising the steps of: sending a physical layer protocol data unit, PPDU, comprising (1002) an extremely high throughput, EHT, operation parameter to a station device (220, 1010), wherein the EHT operation parameter comprises an indicator for indicating a value of a packet extension, PE, duration, a first value of the indicator indicates that the PE duration is 16 µs or 20 µs, and a second value of the indicator indicates that the PE duration is a duration specified by a high efficiency, HE, operation parameter, wherein the indicator is 1 bit, the first value is 1, and the second value is 0.
  2. The method according to claim 1, wherein the PE duration is used for packet extension of a trigger-based physical layer protocol data unit, TB PPDU, triggered by trigger response scheduling, TRS.
  3. The method according to any one of claims 1 to 2, wherein a default PE duration, Default PE Duration, subfield of the HE operation parameter comprises three bits; when values of the default PE duration subfield are 0 to 4, the default PE duration subfield respectively corresponds to predefined PE duration 0 µs, 4 µs, 8 µs, 12 µs and 16 µs; and values 5 to 7 of the default PE duration subfield are reserved values.
  4. A communication method performed by a station device (220, 1010), the method comprising the steps of: • receiving (step 1110) a physical layer protocol data unit, PPDU, comprising an extremely high throughput, EHT, operation parameter from an access device (210, 1020), wherein the EHT operation parameter comprises an indicator for indicating a value of a packet extension, PE, duration, a first value of the indicator indicates that the PE duration is 16 µs or 20 µs, and a second value of the indicator indicates that the PE duration is a duration specified by a high efficiency, HE, operation parameter, wherein the indicator is 1 bit, the first value is 1, and the second value is 0; and • determining (step 1120) the PE duration based on the EHT operation parameter.
  5. The method according to claim 4, wherein the PE duration is used for packet extension of a trigger-based physical layer protocol data unit, TB PPDU, triggered by trigger response scheduling, TRS.
  6. The method according to any one of claims 4 to 5, wherein a default PE duration, Default PE Duration, subfield of the HE operation parameter comprises three bits; when values of the default PE duration subfield are 0 to 4, the default PE duration subfield respectively corresponds to predefined PE duration 0 µs, 4 µs, 8 µs, 12 µs and 16 µs; and values 5 to 7 of the default PE duration subfield are reserved values.
  7. An access device (210, 1020), configured to perform any of the methods according to claims 1 to 3.
  8. A station device (220, 1010), configured to perform any of the methods according to claims 4 to 6.
  9. A computer-readable storage medium storing computer-executable instructions, wherein, when the computer-executable instructions are executed by an access device, the access device is caused to perform any of the methods according to claims 1 to 3.
  10. A computer-readable storage medium storing computer-executable instructions, wherein, when the computer-executable instructions are executed by a station device, the station device is caused to perform any of the methods according to claims 4 to 6.

Description

TECHNICAL FIELD This application relates to the field of communications technologies, and more specifically, to a method for packet extension, a device, a storage medium, and a computer program product. BACKGROUND The wireless local area network (Wireless Local Area Network, WLAN) technology has evolved from the 802.11a/g, 802.11n, 802.11ac, and 802.11ax standards to the 802.11be standard. This comes with continuous increase of data throughput. From this perspective, the 802.11ax standard is also referred to as the high efficiency (High Efficiency, HE) wireless standard, and the 802.11be standard is also referred to as the extremely high throughput (Extremely High Throughput, EHT) wireless standard. A physical layer protocol data unit (PHY Protocol Data Unit, PPDU) is a frame format widely used in a WLAN system, and may be used for data transmission between WLAN nodes such as an access point (AP) and a terminal device (STA). A node serving as a receiving device may have different processing capabilities for the PPDU. In an existing WLAN system, additional processing time for a PPDU may be provided to the receiving device through operations such as pre-FEC padding (Pre-Forward Error Correction padding, pre-FEC padding), post-FEC padding (post-FEC padding), and packet extension (Packet Extension, PE). Specifically, bits for pre-FEC padding and remaining information bits occupy about only a multiple of a quarter of subcarriers in a last symbol (for example, an OFDM symbol) in a data field of the PPDU, for example, may occupy a quarter, two quarters, three quarters, and all subcarriers. When subcarriers occupied through pre-FEC padding do not include all subcarriers of the symbol, decoding may be faster. Remaining subcarriers in the symbol may be padded with post-FEC padding bits, to provide additional processing duration. Further, EP 4 277 175 A1 refers to a method for transmitting a TB PPDU in a wireless communication system. A Non-AP STA can receive a frame for triggering the transmission of a physical layer protocol data unit (PPDU) from an access point (AP), and transmit, in response to the frame, the PPDU including a packet extension (PE) field for providing a processing time for the PPDU. At this time, the frame indicates a format for the PPDU transmitted in response to the frame, and a maximum value of duration for the PE field can be changed according to the format of the PPDU indicated by the frame Further, the document vol. 802.11 EHT; 802.11be, no. 2, March 11, 2021 refers to IEEE P 802.11 wireless LANs. SUMMARY In general, example embodiments of this application provide a packet extension method and apparatus, and a computer-readable storage medium. This problem is solved by the subject matter of the independent claims. Further implementation forms are provided in the dependent claims. The packet extension mechanism provided in embodiments of this application may be applied to various PPDUs transmitted between nodes in a WLAN system, for example, an MU PPDU, a TB PPDU solicited by a trigger frame, and a TB PPDU solicited by TRS. In this mechanism, different requirements for additional processing time can be met by configuring appropriate padding factors and PE values. Therefore, the optimized packet extension mechanism provided in this application can efficiently use network time-frequency resources and significantly improve network performance. BRIEF DESCRIPTION OF DRAWINGS The foregoing and other features, advantages, and aspects of embodiments of this application become more obvious with reference to the accompanying drawings and with reference to the following detailed descriptions. In the accompanying drawings, same or similar reference numerals represent same or similar elements. FIG. 1 is a schematic diagram of a packet padding mechanism in a conventional WLAN network;FIG. 2 is a schematic diagram of an example network environment in which example embodiments of this application may be implemented;FIG. 3 is a schematic diagram of an A-PPDU frame structure according to an example embodiment of this application;FIG. 4 is a schematic diagram of a packet extension mechanism according to an example embodiment 1 of this application;FIG. 5 is a schematic diagram of another packet extension mechanism according to an example embodiment 1 of this application;FIG. 6 is a schematic diagram of operation parameters of a TRS-based TB PPDU according to an example embodiment of this application;FIG. 7 is a diagram of signaling interaction of a communication mechanism according to an example embodiment of this application;FIG. 8 is a flowchart of a communication method according to an example embodiment of this application;FIG. 9 is a flowchart of a communication method according to an example embodiment of this application;FIG. 10 is a diagram of signaling interaction of a communication mechanism according to an example embodiment of this application;FIG. 11 is a flowchart of a communication method according