Reference signal transmission technology

A reference signal sending apparatus, the apparatus comprising a processing unit and a transceiver unit, wherein:

• the transceiver unit receives reference signal sending configuration information from a base station, wherein the reference signal sending configuration information instructs a terminal to transmit a reference signal on one or more frequency domain units, and wherein the one or more frequency domain units and another frequency domain unit form a part of a transmission bandwidth supported by the base station, wherein the reference signal sending configuration information comprises a first parameter and a second parameter, wherein the first parameter indicates an order in which the terminal transmits the reference signal on the one or more frequency domain units, and wherein the second parameter indicates a correspondence between a time unit at which the terminal sends the reference signal and a frequency domain unit on which the terminal sends the reference signal, wherein the reference signal sending configuration information comprises a grouping parameter that is used to instruct the terminal to group the one or more frequency domain units, and wherein the grouping parameter comprises a quantity of frequency domain unit groups;
• the processing unit instructs the transceiver unit to:
• determine, based on the one or more frequency domain units and the quantity of frequency domain unit groups indicated in the grouping parameter, frequency domain units included in each of the frequency domain unit groups;
• and
• send, based on the order indicated in the first parameter and the correspondence between the time unit and the frequency domain unit in the second parameter, the reference signal on the one or more frequency domain units to the base station, wherein sending the reference signal on the one or more frequency domain units comprises simultaneously sending the reference signal on at least two of the frequency domain unit groups.

A reference signal sending method, the method comprising:

• receiving, by a terminal, reference signal sending configuration information from a base station, wherein the reference signal sending configuration information instructs the terminal to transmit a reference signal on at least one frequency domain unit, wherein the at least one frequency domain unit is a part of a transmission bandwidth supported by the base station, wherein the reference signal sending configuration information comprises:
• a first bandwidth that is used to indicate a bandwidth used to transmit the reference signal in the frequency domain unit, and a second bandwidth that is used to indicate a bandwidth for sending the reference signal on a symbol, and wherein the first bandwidth consists of a plurality of second bandwidths, wherein the first bandwidth is different from a total bandwidth of an actually sent reference signal, wherein the first bandwidth comprises a segment of consecutive bandwidths that include the total bandwidth of the actually sent reference signal, wherein the reference signal sending configuration information comprises a grouping parameter that is used to instruct the terminal to group the at least one frequency domain unit, and wherein the grouping parameter comprises a quantity of frequency domain unit groups;
• determining, by the terminal based on a preset rule or indication information from the base station, to select some second bandwidths in a reference signal period to send the reference signal;
• determining, by the terminal and based on the one or more frequency domain units and the quantity of frequency domain unit groups indicated in the grouping parameter, frequency domain units included in each of the frequency domain unit groups;
• and
• simultaneously sending, by the terminal, the reference signal on at least two of the frequency domain unit groups using the selected second bandwidths.