Signal transmission method and user equipment

Abstract

The embodiment of the invention discloses a signal transmission method. The method comprises steps: first configuration parameters sent by a base station are received; on the basis of a corresponding relationship between the configuration parameters and periods, a period corresponding to the first configuration parameters is determined, wherein the period comprises a first period of SRS transmission by means of a special sub frame and a second period of SRS transmission by means of a normal sub frame; and the SRS is transmitted by means of the special subframe in the first period, and / or the SRS is transmitted by means of the normal subframe in the second period. The embodiment of the invention also discloses user equipment.

Description

technical field [0001] The present invention relates to channel sounding reference signal (Sounding Reference Signal, SRS) design in the field of wireless communication, in particular to a signal sending method and user equipment. Background technique [0002] With the development of wireless communication technology, very high transmission rates have been proposed in different fields and scenarios. As a result, some special scenarios, such as high-speed scenarios and airline scenarios, have relatively high requirements for frequency synchronization. If the center frequency is relatively high or very high, the problem of Doppler frequency offset in high-speed scenarios will seriously affect the system performance, especially how to solve the problem of frequency offset estimation brings a huge challenge. [0003] For the problem of frequency offset measurement, although many methods have been proposed in the industry, there are still many problems, especially when the freque...

AI Technical Summary

Problems solved by technology

If the center frequency is relatively high or very high, the problem of Doppler frequency offset in high-speed scenarios will seriously affect system performance, especially how to solve the problem of frequency offset estimation poses a huge challenge

[0003] For the problem of frequency offset measurement, although many methods have been proposed in the industry, there are still many problems, especially when the frequency offset value is large, or the estimation accuracy is relatively poor, or the frequency offset tracking speed is relatively slow. Neither can solve the problem of frequency offset better

According to the traditional way of thinking, SRS is used for frequency offset measurement, and there is a problem of poor estimation accuracy, which makes it difficult to meet the requirements of measurement accuracy.

[0004] Due to the shortage of spectrum resources, the utilization of spectrum resources has also become an important focus. However, various measurement needs require certain resources to be used for the transmission of pilot data, which undoubtedly leads to a reduction in the utilization of resources.

When SRS is transmitted periodically, if we need to set the period to be small in a certain period of time in order to meet some measurement requirements, if the terminal always transmits according to this configuration, it will undoubtedly be a greater waste of resources.

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