Communication method and related device

By transmitting signals to the second device to achieve data transmission and CFO calibration with the third device, the problem of low communication efficiency of passive A-IoT devices is solved, communication efficiency is improved and additional calibration signal overhead is reduced.

WO2026045464A1 Publication Date: 2026-03-05HUAWEI TECH CO LTD
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Patent Information

Application Number
PCT/CN2025/099182
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-08-26
Filing Date
2025-06-05
Publication Date
2026-03-05

AI Technical Summary

Technical Problem

In communication scenarios for passive and active low-power environment IoT (A-IoT) devices, existing technologies require the introduction of a CFO calibration signal into the downlink signal, which reduces the communication efficiency of passive A-IoT devices.

Method used

Data transmission between the second device and CFO calibration between the third device are achieved by sending signals to the second device, thus balancing the communication needs of both devices and avoiding the need to send dedicated calibration signals separately for active A-IoT devices. CFO calibration is performed using multiplexed carrier signals.

Benefits of technology

It improves the communication efficiency of both passive and active A-IoT devices, reduces additional calibration signal overhead, and meets the communication needs of various types of devices.

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Abstract

Provided in the embodiments of the present application are a communication method and a related device. In the method, a first device sends a first signal and a second signal, wherein the first signal is used for transmitting data, the second signal is used for being modulated by a second device to obtain a third signal, the third signal is a feedback signal of response data, and the second signal is also used for carrier frequency offset (CFO) calibration of a third device. On the basis of the solution, the second signal sent by the first device to the second device is not only used for signal modulation of the second device, but is also used for CFO calibration of the third device, that is, data transmission of the second device and the CFO calibration of the third device are realized by means of the second signal, so as to meet the communication requirements of both the second device and the third device, thereby improving the communication efficiency.
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