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US-20260128762-A1 - UWB-BASED PPDU TRANSMISSION METHOD AND APPARATUS

US20260128762A1US 20260128762 A1US20260128762 A1US 20260128762A1US-20260128762-A1

Abstract

This application relates to a UWB-based PPDU transmission method and an apparatus. The method includes: A communication apparatus sends a PPDU, where the PPDU includes a first sequence, and the first sequence is any sequence shown in Table 3a, Table 3b, Table 4, Table 5a, or Table 5b. This application can be used to reduce interference between devices and support coexistence of a plurality of devices. This application is applied to a UWB-based WPAN system, a sensing system, and the like, supporting 802.15 series protocols, such as an 802.15.4ab standard or a next-generation 802.15.4ab standard; and may further be applied to a WLAN system supporting 802.11 series protocols, for example, a next-generation Wi-Fi protocol of 802.11ax, like 802.11be, Wi-Fi 7, or EHT, and for another example, a next-generation of 802.11be, Wi-Fi 8, UHR, or Wi-Fi AI.

Inventors

  • Bin Qian
  • Chenchen LIU
  • Lei Huang
  • Qian Yu
  • Zhengchun ZHOU
  • Xun Yang

Assignees

  • HUAWEI TECHNOLOGIES CO., LTD.

Dates

Publication Date
20260507
Application Date
20260106
Priority Date
20230707

Claims (18)

  1. 1 . An ultra-wideband-based physical layer protocol data unit PPDU transmission method, comprising: generating, by a communication apparatus, a physical layer protocol data unit PPDU, wherein the PPDU comprises a first sequence, and the first sequence is any sequence shown in Table 3a, Table 3b, Table 4, Table 5a, or Table 5b; and sending, by the communication apparatus, the PPDU.
  2. 2 . The method according to claim 1 , wherein the first sequence is any sequence in a sequence set, and sequences in the sequence set have different lengths.
  3. 3 . The method according to claim 2 , wherein a ratio of a maximum absolute value of an amplitude to an autocorrelation main lobe amplitude of one symbol corresponding to a second sequence is less than or equal to a second preset threshold, the amplitude is obtained after cross-correlation results between a plurality of repeated symbols corresponding to the first sequence and the symbol corresponding to the second sequence in the sequence set are accumulated at a periodicity of a length of the symbol corresponding to the second sequence and then finally obtained results are averaged, and the second sequence is any sequence other than the first sequence in the sequence set.
  4. 4 . The method according to claim 1 , wherein an absolute value of a periodic autocorrelation maximum side lobe amplitude of the first sequence is less than or equal to 2.
  5. 5 . The method according to claim 1 , wherein a ratio of an autocorrelation main lobe amplitude of the first sequence to an autocorrelation maximum side lobe amplitude is greater than or equal to a first preset threshold.
  6. 6 . The method according to claim 1 , wherein a length of the first sequence is any integer bit from 56 to 81 or from 106 to 162.
  7. 7 . An ultra-wideband-based physical layer protocol data unit PPDU transmission method, comprising: receiving, by a communication apparatus, a physical layer protocol data unit PPDU, wherein the PPDU comprises a first sequence, and the first sequence is any sequence shown in Table 3a, Table 3b, Table 4, Table 5a, or Table 5b; and processing, by the communication apparatus, the PPDU.
  8. 8 . The method according to claim 7 , wherein the first sequence is any sequence in a sequence set, and sequences in the sequence set have different lengths.
  9. 9 . The method according to claim 8 , wherein a ratio of a maximum absolute value of an amplitude to an autocorrelation main lobe amplitude of one symbol corresponding to a second sequence is less than or equal to a second preset threshold, the amplitude is obtained after cross-correlation results between a plurality of repeated symbols corresponding to the first sequence and the symbol corresponding to the second sequence in the sequence set are accumulated at a periodicity of a length of the symbol corresponding to the second sequence and then finally obtained results are averaged, and the second sequence is any sequence other than the first sequence in the sequence set.
  10. 10 . The method according to claim 7 , wherein an absolute value of a periodic autocorrelation maximum side lobe amplitude of the first sequence is less than or equal to 2.
  11. 11 . The method according to claim 7 , wherein a ratio of an autocorrelation main lobe amplitude of the first sequence to an autocorrelation maximum side lobe amplitude is greater than or equal to a first preset threshold.
  12. 12 . The method according to claim 7 , wherein a length of the first sequence is any integer bit from 56 to 81 or from 106 to 162.
  13. 13 . A communication apparatus, comprising: one or more processors, wherein the one or more processors are coupled to one or more memories; and the one or more memories are configured to store a computer program, and the one or more processors are configured to execute the computer program stored in the one or more memories, to enable the communication apparatus to perform the method of: generating a physical layer protocol data unit PPDU, wherein the PPDU comprises a first sequence, and the first sequence is any sequence shown in Table 3a, Table 3b, Table 4, Table 5a, or Table 5b; and sending the PPDU.
  14. 14 . The apparatus according to claim 13 , wherein the first sequence is any sequence in a sequence set, and sequences in the sequence set have different lengths.
  15. 15 . The apparatus according to claim 14 , wherein a ratio of a maximum absolute value of an amplitude to an autocorrelation main lobe amplitude of one symbol corresponding to a second sequence is less than or equal to a second preset threshold, the amplitude is obtained after cross-correlation results between a plurality of repeated symbols corresponding to the first sequence and the symbol corresponding to the second sequence in the sequence set are accumulated at a periodicity of a length of the symbol corresponding to the second sequence and then finally obtained results are averaged, and the second sequence is any sequence other than the first sequence in the sequence set.
  16. 16 . The apparatus according to claim 13 , wherein an absolute value of a periodic autocorrelation maximum side lobe amplitude of the first sequence is less than or equal to 2.
  17. 17 . The apparatus according to claim 13 , wherein a ratio of an autocorrelation main lobe amplitude of the first sequence to an autocorrelation maximum side lobe amplitude is greater than or equal to a first preset threshold.
  18. 18 . The apparatus according to claim 13 , wherein a length of the first sequence is any integer bit from 56 to 81 or from 106 to 162.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2024/103215, filed on Jul. 2, 2024, which claims priority to Chinese Patent Application No. 202310840919.0, filed on Jul. 7, 2023. The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties. TECHNICAL FIELD This application relates to the field of communication technologies, and in particular, to an ultra-wideband (ultra-wideband, UWB)-based physical layer protocol data unit (physical layer protocol data unit, PPDU) transmission method and an apparatus. BACKGROUND As ultra-wideband (ultra-wideband, UWB) enters the civilian field, ultra-wideband (UWB) wireless communication has become one of physical layer technologies for short-range and high-speed wireless networks. An ultra-wideband (UWB) technology is a wireless carrier communication technology that can perform data transmission, for example, by using nanosecond-level non-sinusoidal wave narrow pulses, and therefore, occupies a very wide spectrum range. Because of narrow pulses and low radiation spectral density of the UWB, the UWB has advantages such as a strong multi-path resolution capability, low power consumption, and high confidentiality. The institute of electrical and electronics engineers (institute of electrical and electronics engineers, IEEE) has incorporated the UWB technology into IEEE 802 series wireless standards and has released a high-speed wireless personal area network (wireless personal area network, WPAN) standard IEEE 802.15.4a based on the UWB technology, and an evolved version IEEE 802.15.4z of IEEE 802.15.4a. A next-generation UWB wireless personal area network (WPAN) standard 802.15.4ab is under discussion. One of the key topics of 802.15.4ab is coexistence of a plurality of UWB devices, that is, a local device does not interfere with another device, and the another device does not interfere with normal use of the local device. Manners of suppressing interference are as follows: (1) Time orthogonality: Different users transmit and receive UWB signals at different moments, but time coordination cannot be implemented for devices that are not in a same network. (2) Frequency band orthogonality: Different users use different UWB channels, but currently, most UWB devices support limited channels, which are mainly a channel 5 and a channel 9. (3) Code orthogonality: Different users use different sequences, and interference is suppressed by reducing a cross-correlation result between sequences. However, cross-correlation performance between sequences used in a current UWB system is poor, and interference cannot be effectively reduced. SUMMARY Embodiments of this application provide a UWB-based PPDU transmission method and an apparatus, to reduce interference between devices and support coexistence of a plurality of devices. The following describes this application from different aspects. It should be understood that the following implementations and beneficial effect of different aspects may be mutually referenced. According to a first aspect, this application provides a UWB-based PPDU transmission method. The method is applied to a first communication apparatus, and the method includes: generating and sending a PPDU, where the PPDU includes a first sequence, and the first sequence is any sequence shown in Table 3a, Table 3b, Table 4, Table 5a, or Table 5b below. For example, the first sequence in this application may be used to implement one or more of the following functions: time synchronization, sensing measurement, ranging, or device wakeup. For example, the first sequence may be carried in one or more of the following fields of the PPDU: a synchronization field, a wakeup (wakeup) field, a sensing field, or a ranging (ranging) field. A specific function of the first sequence is not limited in this application. In some scenarios, an operation of generating the PPDU may be performed by another apparatus or device. The first communication apparatus may obtain the PPDU from the another apparatus or device, and then send the PPDU. In this application, a sequence used in a UWB system is designed and used in a PPDU. The sequence (for example, the first sequence) has good autocorrelation performance and cross-correlation performance, and therefore can reduce interference between devices and support coexistence of a plurality of devices. According to a second aspect, this application provides a UWB-based PPDU transmission method. The method is applied to a second communication apparatus, and the method includes: receiving a PPDU, where the PPDU includes a first sequence, and the first sequence is any sequence shown in Table 3a, Table 3b, Table 4, Table 5a, or Table 5b; and processing the received PPDU. For example, the second communication apparatus may process the received PPDU by using a locally pre-stored sequence, for example, perform a correlation operation, and then may pe