Signal transmission method, and apparatus

A signal transmission method, comprising:

• receiving an alternative transmission configuration that is sent by a transmit end and that corresponds to a first channel quality indicator (CQI), wherein the first CQI is selected by the transmit end from CQIs calculated for all alternative transmission configurations, and each alternative transmission configuration comprises at least one of the following:
• a waveform parameter, a subcarrier spacing parameter, or a symbol period parameter;
• determining a transmission configuration according to the received alternative transmission configuration;
• and
• transmitting a signal according to the determined transmission configuration;
• before the determining a transmission configuration according to the received alternative transmission configuration, further comprising:
• receiving the first CQI, wherein
• the determining a transmission configuration according to the received alternative transmission configuration comprises:
• determining the transmission configuration according to the first CQI and the received alternative transmission configuration.

A transmit end, comprising:

• a processor, configured to calculate a channel quality indicator (CQI) of each of at least two groups of alternative transmission configurations, wherein each alternative transmission configuration comprises at least one of the following:
• a waveform parameter, a subcarrier spacing parameter, or a symbol period parameter;
• wherein the processor is further configured to select a first CQI from all the calculated CQIs;
• and
• a transmitter, configured to send, to a receive end, a first alternative transmission configuration corresponding to the selected first CQI, so that the receive end transmits a signal according to the first alternative transmission configuration;
• wherein the processor is further configured to perform at least one of:
• if the receive end uses one frequency range during signal transmission, calculate a CQI of each of at least two groups of alternative transmission configurations in the one frequency range;
• and
• if the receive end uses at least two frequency ranges during signal transmission, calculate, for any one of the at least two frequency ranges, a CQI of each of at least two groups of alternative transmission configurations in the any one of the at least two frequency ranges.

A receive end, comprising:

• a receiver, configured to receive an alternative transmission configuration that is sent by a transmit end and that corresponds to a first channel quality indicator (CQI), wherein the first CQI is selected by the transmit end from CQIs calculated for all alternative transmission configurations, and the alternative transmission configuration comprises at least one of the following:
• a waveform parameter, a subcarrier spacing parameter, or a symbol period parameter;
• a processor, configured to determine a transmission configuration according to the received alternative transmission configuration;
• and
• a transmitter, configured to transmit a signal according to the determined transmission configuration;
• wherein the receiver is further configured to:
• receive the first CQI;
• and
• the processor is further configured to:
• determine the transmission configuration according to the first CQI and the received alternative transmission configuration.