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Data transmission method, terminal, and base station in LAA-LTE system

專利號
US10873940B2
公開日期
2020-12-22
申請人
HUAWEI TECHNOLOGIES CO., LTD.（CN Shenzhen）
發(fā)明人
Juan Zheng; Zuomin Wu; Lei Guan; Qiang Li
IPC分類
H04W72/04; H04W56/00; H04L5/00; H04L27/26; H04L27/00
技術(shù)領(lǐng)域
subframe,ofdm,symbols,first,cell,downlink,dmtc,data,in,symbol
地域： Guangdong

摘要

The present disclosure relates to example data transmission methods, user equipment, and access network devices in an LAA-LTE system. An example data receiving method includes determining, by user equipment, first information of a first cell. The user equipment determines a first subframe based on the first information, where a downlink data transmission length of the first subframe is less than a first threshold. The user equipment then determines a data transmission characteristic of the cell in the first subframe based on a preset condition, so as to receive, based on the data transmission characteristic, data including the first subframe. In doing so, a data transmission characteristic of a base station or a terminal is standardized, and a reference signal such as a DRS can be correctly identified.

說明書

It should be noted that, in this embodiment of the present invention, the control information indicates that downlink data transmission of the first subframe is less than the first threshold. When the first threshold is 1 ms, the control information may directly indicate that a target subframe is the first subframe (or a partial subframe), or may directly indicate a data transmission length of a target subframe. The target subframe herein may be any subframe in a data transmission burst of the first cell, for example, any one of a first/second/third/fourth/fifth subframe in FIG. 6. Alternatively, the target subframe may be any subframe on a carrier on which the first cell is located, and in this case, in the target subframe, the first cell may preempt an unlicensed frequency band resource, or may preempt no unlicensed frequency band resource. When the first threshold is greater than 1 ms, the control information may indicate whether the target subframe is a subframe in a data transmission burst of the first cell. Explanation of a data transmission burst is the same as above, and details are not described.

In another embodiment of the present invention, step 112 further includes: indicating, by the access network device by using a reference signal including a reference sequence, that the downlink data transmission length of the first subframe is less than the first threshold.

Specifically, the access network device may send the reference signal including a reference sequence in any subframe in one burst data transmission including the first subframe, to indicate that the downlink data transmission length of the first subframe is less than the first threshold.

權(quán)利要求

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