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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

In an embodiment of the present invention, the determining, by the user equipment, a data transmission characteristic of the first cell in the first subframe based on a preset condition includes: When a time resource of a CSI-RS and/or a CSI-IM of the user equipment overlaps the first subframe, the first subframe includes the CSI-RS and/or the CSI-IM of the user equipment. The CSI-RS and/or the CSI-IM of the user equipment is periodically configured. However, for user equipment in an LTE system release 12, CSI-RS and CSI-IM transmission is not supported in a DwPTS. In this embodiment, the CSI-RS and CSI-IM transmission is supported, and a channel state information measurement and a channel state interference information measurement are implemented.

It should be noted that, in this embodiment of the present invention, the data transmission length of the first subframe may include 14 OFDM symbols if the first threshold corresponds to a value greater than 1 ms.

It should be noted that, in this embodiment of the present invention, in a radio frame, a first subframe is a subframe whose subframe index number is 0 and a sixth subframe is a subframe whose subframe index number is 5. When the first subframe is the subframe whose subframe index number is 0, the first slot included in the first subframe is a slot whose slot index number is 0. When the first subframe is the subframe whose subframe index number is 5, the first slot included in the first subframe is a slot whose slot index number is 10.

權(quán)利要求

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