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Wireless communication method and device for blind detection of downlink signals

專利號(hào)
US11627611B2
公開日期
2023-04-11
申請(qǐng)人
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.（CN Dongguan）
發(fā)明人
Hai Tang
IPC分類
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

The transmission parameters of the preamble signal may include, but are not limited to, time domain characteristics, frequency domain characteristics, sequence characteristics, antenna port, and configuration of the preamble signal as described above.

Alternatively, the embodiments of the present disclosure facilitate a terminal device to perform AGC adjustment, and there is a certain relationship between reception power for which the terminal device receives a preamble signal and reception power for which the terminal device receives a downlink signal. Specifically, after receiving the preamble signal sent by the network device, the terminal device can adaptively adjust the reception power of the downlink signal according to the reception power for receiving the preamble signal.

Therefore, in the embodiments of the present disclosure, sending a preamble signal, which is used for determining that the current carrier has an ability to transmit a downlink signal, can reduce the complexity of blind detection of the downlink signal by a terminal device, simplify the terminal device, and reduce power consumption.

FIG. 10 is a schematic flowchart of another wireless communication method according to some embodiments of the present disclosure. The method in FIG. 10 includes at least part of the following content.

At block 1010, a preamble signal is detected on a carrier in an unlicensed frequency band.

At block 1020, a downlink signal is received on the carrier, in response to the preamble signal being successfully detected.

The downlink signal may be, for example, PDCCH or PDSCH.

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