Sounding reference signal srs transmission method and communication device

Abstract

Embodiments of the present application provide an SRS transmission method and communication device. The method includes: receiving first configuration information and second configuration information, where the first configuration information is used to indicate SRS resources for CB and / or whether there is a For the multiplexing of the CB and the SRS used for the AS, the second configuration information is used to indicate the maximum number of transmission layers and the waveform used by the network device and the terminal device to communicate; the terminal device according to the first configuration information and the second configuration information, respectively. It is determined whether the condition that there is no multiplexing of SRS for CB and SRS and the condition that the upper limit value of the actual number of transmission layers is less than the number of antennas actually used by the terminal equipment for transmission are met; if both conditions are met, The terminal device sends the SRS for CB to the network device in SCDD mode. Thus, the scenario in which the SRS used for CB is sent in SCDD mode is expanded.

Description

technical field [0001] The embodiments of the present application relate to the field of electronic technologies, and in particular, to an SRS transmission method and a communication device. Background technique [0002] A sounding reference signal (sounding reference signal, SRS) is a kind of reference signal used to measure the uplink channel. The network device may perform uplink channel measurement based on the SRS sent by the terminal device, so as to obtain channel state information (channel state information, CSI) of the uplink channel, so as to facilitate scheduling of uplink resources. In some cases, the terminal equipment needs to transmit the SRS by means of antenna switching. For example, in some systems with channel reciprocity, the network device may estimate the CSI of the downlink channel through the CSI of the uplink channel obtained by measuring the uplink channel, so as to schedule downlink resources. The functions of the SRS usually include: determining...

AI Technical Summary

Problems solved by technology

However, in the case where there is no multiplexing of SRS for CB and SRS for AS and the number of antenna ports is greater than or equal to 2 and the number of transmit antennas is equal to the number of antenna ports, at this time, the communication system cannot uniquely determine whether it is a single Streaming mode or multi-streaming mode, the terminal device is not sure whether the SRS used for CB can be sent in SCDD

Therefore, the scenario where the traditional SRS used for CB is sent in SCDD mode is relatively limited.

Images