Demodulation reference signal transmission method and related device

A demodulation reference signal transmission method, comprising:

• receiving, by a terminal device, configuration parameter indication information of a demodulation reference signal, wherein the configuration parameter indication information comprises an index;
• determining, by the terminal device based on a mapping relationship between an index and a configuration parameter set and that is in a preset first demodulation reference signal mapping relationship set, a configuration parameter set corresponding to the received index, wherein the determined configuration parameter set comprises a frequency-domain comb;
• and
• sending, by the terminal device, the demodulation reference signal based on the determined configuration parameter set.

A network device, comprising:

• a transmitter, configured to:
• send configuration parameter indication information of a demodulation reference signal, wherein the configuration parameter indication information comprises an index, the configuration parameter indication information indicates a configuration parameter set corresponding to the index, the configuration parameter set comprises a frequency-domain comb, and a mapping relationship between the configuration parameter set and the index is a mapping relationship in a preset first demodulation reference signal mapping relationship set;
• and
• a receiver, configured to receive, based on the configuration parameter set, the demodulation reference signal sent by the terminal device.

A terminal device, comprising:

• a receiver, configured to receive configuration parameter indication information of a demodulation reference signal, wherein the configuration parameter indication information comprises an index;
• a processor, configured to determine, based on a mapping relationship between an index and a configuration parameter set and that is in a preset first demodulation reference signal mapping relationship set, a configuration parameter set corresponding to the received index, wherein the determined configuration parameter set comprises a frequency-domain comb;
• and
• a transmitter, configured to send the demodulation reference signal based on the determined configuration parameter set.