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Wireless communication method and device for blind detection of downlink signals

專利號
US11627611B2
公開日期
2023-04-11
申請人
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.（CN Dongguan）
發(fā)明人
Hai Tang
IPC分類
H04W74/08; H04W76/27; H04L5/00; H04L27/26; H04W80/02
技術(shù)領(lǐng)域
preamble,signal,symbol,downlink,subcarrier,point,cp,in,time,spacing
地域： Guangdong

摘要

A wireless communication method and device are disclosed. The method includes performing channel detection for a carrier in an unlicensed frequency band; and sending a preamble signal on the carrier from a first time-point, in response to the channel detection succeeding, the preamble signal being configured for indicating that the carrier has an ability to transmit a downlink signal.

說明書

Based on this, if a downlink signal (for example, PDSCH or PDCCH) is blindly detected each time, it will increase the complexity and power consumption of a terminal. In embodiments of the present disclosure, sending the preamble signal, which is used to determine that the current carrier is able to be used to transmit the downlink signal, can reduce the complexity of blind detection of downlink signals by a terminal device, simplify the terminal device, and reduce power consumption.

The format of preamble signal symbol and a method for determining the first time-point will be described in detail below with reference to FIG. 3 to FIG. 6. In FIG. 3 to FIG. 6, a subcarrier spacing of the preamble signal is equal to a subcarrier spacing of 4 downlink signals as an example for description.

It should be noted that in FIG. 3 to FIG. 6, a time-length can be divided according to a length of a downlink signal symbol. That is, lengths of symbol #n and symbol #(n+1) are equal to a length of one downlink signal symbol, respectively.

權(quán)利要求

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