Data sending method, related device, and system

A communication apparatus, comprising a receiver and a transmitter, wherein

• the receiver is configured to receive resource location information that is sent by a network device and that is of a first reference signal and a physical channel, wherein
• the first reference signal is mapped on a first time-frequency resource, the first time-frequency resource partially or totally overlaps a second time-frequency resource corresponding to the physical channel, and a time-frequency resource corresponding to a part that is in the second time-frequency resource and that overlaps the first time-frequency resource is an overlapping resource;
• and the terminal skips sending the first reference signal;
• and
• the overlapping resource is not used to transmit the physical channel, the transmitter is configured to send the physical channel to the network device on a third time-frequency resource, and the third time-frequency resource is a resource in the second time-frequency resource other than the overlapping resource;
• or
• the overlapping resource is used to send a second reference signal;
• and the transmitter is configured to send the second reference signal on the overlapping resource, and send the physical channel on the third time-frequency resource;
• or
• a second time-frequency resource corresponding to a symbol in which the overlapping resource is located is an overlapping region, the overlapping region is used to send a second reference signal, and a fourth time-frequency resource in the second time-frequency resource other than the overlapping region is used to transmit the physical channel;
• the transmitter is configured to send the second reference signal in the overlapping region, and the transmitter is further configured to send the physical channel on the fourth time-frequency resource;
• and the symbol is a discrete Fourier transform-spread orthogonal frequency division multiplexing (DFT-S-OFDM) symbol or an orthogonal frequency division multiplexing (OFDM) symbol, wherein
• the second reference signal is orthogonal to the first reference signal.

A network device, comprising a transmitter and a receiver, wherein

• the transmitter sends resource location information of a first reference signal and a physical channel to a terminal, wherein
• the first reference signal is mapped on a first time-frequency resource, the first time-frequency resource partially or totally overlaps a second time-frequency resource corresponding to the physical channel, and a time-frequency resource corresponding to a part that is in the second time-frequency resource and that overlaps the first time-frequency resource is an overlapping resource;
• and the terminal skips sending the first reference signal;
• and
• the overlapping resource is not used to transmit the physical channel, a third time-frequency resource is used to send the physical channel to the network device, and the third time-frequency resource is a resource in the second time-frequency resource other than the overlapping resource;
• or
• the overlapping resource is used to send a second reference signal;
• and the third time-frequency resource is used to send the physical channel;
• or
• a second time-frequency resource corresponding to a symbol in which the overlapping resource is located is an overlapping region, the overlapping region is used to send a second reference signal, and a fourth time-frequency resource in the second time-frequency resource other than the overlapping region is used to transmit the physical channel;
• and the symbol is a discrete Fourier transform-spread orthogonal frequency division multiplexing (DFT-S-OFDM) symbol or an orthogonal frequency division multiplexing (OFDM) symbol, wherein
• the second reference signal is orthogonal to the first reference signal;
• and
• the receiver is configured to receive the physical channel sent by the terminal;
• and the receiver is further configured to receive the second reference signal sent by the terminal.