Time lead indication method and device, base station and terminal

Abstract

The invention provides a time lead indication method and device, a base station and a terminal. The method comprises the steps of sending sub-carrier interval configuration information of a physical uplink sharing channel (PUSCH) and / or a physical uplink control channel (PUCCH) to the terminal; receiving a lead code fed back by the terminal according to the sub-carrier interval configuration information; according to the lead code, acquiring a quantized value of the time lead corresponding to a tracking area; and sending the quantized value of the time lead to the terminal. According to the method, device, base station and terminal provided by the embodiment of the invention, under the condition of ensuring that the signaling overhead is invariable, the indication of the uplink time lead is effectively achieved, and the condition that the random access mechanism of 5G NR can adjust the quantized interval of the time lead according to the uplink carrier interval is ensured, and the uplink orthogonality is achieved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a timing advance indicating method, base station, terminal and device. Background technique [0002] In LTE (Long Term Evolution, Long Term Evolution), all downlink and uplink control channels, data channels and reference signals use the same 15 kHz subcarrier spacing. In addition, the preamble format of each PRACH (Physical Random Access Channel) supports only one SCS (subcarrier spacing, subcarrier spacing). For example, the subcarrier spacing supported by preamble formats 0 to 3 is 1.25kHz, and the subcarrier spacing supported by preamble format 4 is 7.5kHz. [0003] Different from LTE, different subcarrier spacings can be used in the uplink and downlink control channels, data channels and reference signals of 5G NR (New Radio). At the same time, each preamble format of NR also supports multiple subcarrier intervals. [0004] In order to avoid mutual interfer...

AI Technical Summary

Problems solved by technology

[0008] Embodiments of the present invention provide a timing advance indication method, a base station, a terminal, and a device, so as to solve the time difference between uplink timing offset and uplink signal alignment time versus timing advance when performing uplink timing adjustment in the prior art Quantization unit selection has an impact, which in turn affects the issue of uplink orthogonality

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