Method for determining timing advance, terminal device, and network side device

Abstract

The invention provides a method for determining timing advance (TA), a terminal device, a network side device and a communication system. The method comprises the following steps of: receiving a CSI-RS configuration or activation message of the network side device, wherein the message is used for configuring or activating a CSI-RS; transmitting a synchronization signal to the network side device on the basis of the CSI-RS configuration or activation message; receiving a TA adjustment message transmitted by the network side device, wherein the message carries a TA value determined by the network side device on the basis of the synchronization signal; on the basis of the TA value carried in the TA adjustment message, determining the TA value corresponding to the configured or activated CSI-RS. The synchronization signal is transmitted by a terminal to a network side on the basis of the CSI-RS configuration or activation message of the network side, and the corresponding TA value is calculated by the network side on the basis of the synchronization signal and then returned to the terminal, thus the terminal is enabled to learn the corresponding relation between the TA value and the CSI-RS, thereby the precision of uplink timing is raised, and uplink synchronization is realized.

Description

technical field [0001] The embodiments of the present invention relate to the field of wireless communication, and more specifically, to a method for determining a timing advance, a terminal device, and a network side device. Background technique [0002] In the LTE (Long Term Evolution; long-term evolution) R11 version, a new operation scenario will be introduced, that is, coordinated multi-point transmission / reception, CoMP (coordinated multi-point) for short. The main benefit of implementing CoMP is that the rate of data transmission can be increased, for example, the transmission of video services can be performed smoothly, thereby improving user satisfaction. Currently, there are four specific scenarios that need to be focused on for research, namely: [0003] Scenario 1: CoMP within a homogeneous website; [0004] Scenario 2: Homogeneous network with high power remote radio head (RRH); [0005] Scenario 3: In a heterogeneous network scenario with low power RRH, the ...

AI Technical Summary

Problems solved by technology

[0009] However, in the CoMP scenario, due to the different distances between the UE and different nodes, the time for the signal to reach different nodes may be different

And due to the existence of multiple CSI-RSs, after receiving a TA, if the UE performs timing adjustment on multiple CSI-RSs based on the same TA, the adjustment result may be inaccurate

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