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Wireless communication method and device for blind detection of downlink signals

專(zhuān)利號(hào)
US11627611B2
公開(kāi)日期
2023-04-11
申請(qǐng)人
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.（CN Dongguan）
發(fā)明人
Hai Tang
IPC分類(lèi)
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(shuō)明書(shū)

Alternatively, the terminal device may detect the preamble signal in a time interval from a starting point of the time-period 3 to an ending point of the symbol #n.

Alternatively, the terminal device may detect the preamble signal in a time interval from a starting point of the time-period 4 to an ending point of the symbol #n.

When the first time-point is a starting point of a downlink signal symbol, it means that the terminal device detects the preamble signal from a starting position of a downlink signal symbol to an ending position of the downlink signal symbol. In this way, it can be ensured that different terminal devices have the same time-length for detecting the preamble signal. In the case of independent network SA, this is helpful for the terminal device to complete synchronization.

Alternatively, in addition to detecting the preamble signal from the preset first time-point as described above, the terminal device may also detect the preamble signal by means of sliding window detection.

Alternatively, a time-length of each processing in the sliding window detection is a length of an information segment in the preamble signal symbol. In this way, it is beneficial to increase the probability for which the terminal device detects the preamble signal.

Alternatively, the time-length of each processing may also be referred to as a window length of a time window, and the terminal device may set the window length to be a length of one information segment in one preamble signal symbol.

權(quán)利要求

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