Signal transmission method, terminal, network equipment and storage medium
A transmission method and signal technology, which are applied in transmission systems, digital transmission systems, and multiple use of transmission paths, which can solve problems such as the inability to estimate the Doppler frequency shift and the inability to effectively perform Doppler frequency shift precompensation.
Active Publication Date: 2021-09-07
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology
Since the RRH does not know what downlink frequency the UE is based on to transmit the uplink signal, the RRH cannot estimate the Doppler frequency shift experienced by the downlink or uplink, so it cannot effectively pre-compensate the Doppler frequency shift
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[0183] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0184]In the HST-SFN scenario, multiple transmission and reception points (TRPs) (which can be some RRHs) are connected to the same BBU (Base Band Unit, baseband processing unit) through optical fibers, and these multiple TRPs use the same Cell ID. By connecting multiple TRPs, the coverage of the cell is expanded, thereby reducing the cell switch...
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The embodiment of the invention provides a signal transmission method, a terminal, network equipment and a storage medium. The method comprises the following steps: receiving a plurality of first downlink signals; determining a downlink receiving frequency corresponding to each first downlink signal, and determining a transmission frequency of each uplink signal having an association relationship with each first downlink signal based on the downlink receiving frequency corresponding to each first downlink signal; sending each uplink signal based on the transmission frequency of each uplink signal, wherein the frequency offset determined based on the uplink signal having the association relationship with the first downlink signal is used for determining the transmission frequency of the second downlink signal. In the embodiment of the invention, the pre-compensation of the downlink Doppler frequency offset is carried out through each transmission receiving point, so that the channel estimation error is reduced, and the downlink transmission performance is improved.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a signal transmission method, a terminal, a network device and a storage medium. Background technique [0002] Coordinated multi-point is an important technical means in the wireless communication system. Distributed transmission through multiple distributed transmission and receiving points can improve the coverage of the cell edge and reduce the time delay and signaling overhead caused by handover. For example, in a high-speed rail scenario, in order to avoid frequent cell handovers by terminal UEs (User Equipment, user equipment), the deployment method of SFN (Single Frequency Network, single frequency network), referred to as HST-SFN (High Speed Train-Single Frequency Network) is usually adopted. Network, high-speed rail single frequency network) scenarios. In the HST-SFN scenario, a cell includes multiple transmission and reception points (for exam...
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IPC IPC(8): H04W72/04H04L27/00H04L5/00
CPCH04W72/0453H04L27/0014H04L5/0053H04L2027/0026H04W72/23H04L5/0005H04L5/0094H04L5/0023H04L5/0035H04W72/0446H04L5/0048H04W72/046H04W72/1268H04W72/21H04B7/01H04L25/021
Inventor 黄秋萍苏昕高秋彬卢艺文
Owner DATANG MOBILE COMM EQUIP CO LTD