METHOD OF COMMUNICATION AND COMMUNICATION DEVICE

By transmitting high-frequency PPDUs in OFDM mode with varied subcarrier spacings, the method addresses the incompatibility of modulation schemes across frequency bands, enhancing transmission and reception performance in WLAN communication.

BR112025019505A2Pending Publication Date: 2026-07-14HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
BR · BR
Patent Type
Applications
Current Assignee / Owner
HUAWEI TECH CO LTD
Filing Date
2024-03-13
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

The existing modulation schemes in wireless local area network (WLAN) communication, particularly in high-frequency standards, are not unified with low-frequency standards, leading to incompatible PPDU formats and suboptimal transmission and reception performance.

Method used

A communication method and device that transmit high-frequency PPDUs in OFDM mode, utilizing different subcarrier spacings for different parts of the PPDU, with the first part using a first subcarrier spacing and the second part using a second subcarrier spacing, to facilitate unified transmission and reception across frequency bands.

Benefits of technology

This approach enables better transmission performance by aligning subcarrier spacing requirements and reducing peak-to-average power ratio (PAPR), improving carrier frequency shift correction accuracy.

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Abstract

The present application relates to the field of communications, and in particular, to a PPDU transmission method and a communication apparatus. The solution can be applied to a WLAN system supporting an IEEE 802.11ax next generation Wi-Fi protocol, such as 802.11be, Wi-Fi 7 or EHT, and 802.11 series protocols such as 802.11be next generation and Wi-Fi 8 and can also be applied to a UWB-based wireless personal area network system and a sensing system. In the method, the ratio of the spacing of subcarriers used for transmitting a first part of a first PPDU to the spacing of subcarriers used for transmitting a first part of a second PPDU is different from the ratio of the spacing of subcarriers used for transmitting a second part of the first PPDU to the spacing of subcarriers used for transmitting a second part of the second PPDU, and the first PPDU and the second PPDU are respectively transmitted at high frequency and low frequency. Thus, better high-frequency PPDU transmission performance is achieved.
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