Method and apparatus for transmitting DMRS

A method for obtaining a demodulation reference signal (DMRS), comprising:

• determining a time-frequency resource used to carry the DMRS, wherein the DMRS is carried on the time-frequency resource in at least one resource unit, wherein a total quantity of supported DMRS ports is six DMRS ports, the six DMRS ports are divided into three DMRS port groups, each DMRS port group comprises two DMRS ports, the three DMRS port groups comprise a first DMRS port group, a second DMRS port group, and a third DMRS port group, and a same time-frequency resource is multiplexed for the DMRS ports in each DMRS port group in a code division multiplexing (CDM) manner, wherein, in each resource unit, a time-frequency resource to which the first DMRS port group is mapped comprises a subcarrier 0, a subcarrier 1, a subcarrier 6, and a subcarrier 7 that are in a first symbol and a second symbol in a time domain, a time-frequency resource to which the second DMRS port group is mapped comprises a subcarrier 2, a subcarrier 3, a subcarrier 8, and a subcarrier 9 that are in the first symbol and the second symbol in the time domain, and a time-frequency resource to which the third DMRS port group is mapped comprises a subcarrier 4, a subcarrier 5, a subcarrier 10, and a subcarrier 11 that are in the first symbol and the second symbol in the time domain;
• and
• obtaining the DMRS by using the time-frequency resource.

An indication method, comprising:

• generating indication information, wherein the indication information is used to indicate a time-frequency resource used to carry a demodulation reference signal (DMRS), wherein the DMRS is carried on the time-frequency resource in at least one resource unit, wherein a total quantity of supported DMRS ports is six DMRS ports, the six DMRS ports are divided into three DMRS port groups, each DMRS port group comprises two DMRS ports, the three DMRS port groups comprise a first DMRS port group, a second DMRS port group, and a third DMRS port group, and a same time-frequency resource is multiplexed for the DMRS ports in each DMRS port group in a code division multiplexing (CDM) manner, wherein, in each resource unit, a time-frequency resource to which the first DMRS port group is mapped comprises a subcarrier 0, a subcarrier 1, a subcarrier 6, and a subcarrier 7 that are in a first symbol and a second symbol in a time domain, a time-frequency resource to which the second DMRS port group is mapped comprises a subcarrier 2, a subcarrier 3, a subcarrier 8, and a subcarrier 9 that are in the first symbol and the second symbol in the time domain, and a time-frequency resource to which the third DMRS port group is mapped comprises a subcarrier 4, a subcarrier 5, a subcarrier 10, and a subcarrier 11 that are in the first symbol and the second symbol in the time domain;
• and
• sending the indication information.

A method for determining a time-frequency resource, comprising:

• receiving indication information, wherein the indication information is used to indicate a time-frequency resource used to carry a demodulation reference signal (DMRS), wherein the DMRS is carried on the time-frequency resource in at least one resource unit, wherein a total quantity of supported DMRS ports is six DMRS ports, the six DMRS ports are divided into three DMRS port groups, each DMRS port group comprises two DMRS ports, the three DMRS port groups comprise a first DMRS port group, a second DMRS port group, and a third DMRS port group, and a same time-frequency resource is multiplexed for the DMRS ports in each DMRS port group in a code division multiplexing (CDM) manner, wherein, in each resource unit, a time-frequency resource to which the first DMRS port group is mapped comprises a subcarrier 0, a subcarrier 1, a subcarrier 6, and a subcarrier 7 that are in a first symbol and a second symbol in a time domain, a time-frequency resource to which the second DMRS port group is mapped comprises a subcarrier 2, a subcarrier 3, a subcarrier 8, and a subcarrier 9 that are in the first symbol and the second symbol in the time domain, and a time-frequency resource to which the third DMRS port group is mapped comprises a subcarrier 4, a subcarrier 5, a subcarrier 10, and a subcarrier 11 that are in the first symbol and the second symbol in the time domain;
• and
• determining the time-frequency resource based on the indication information.

An apparatus for sending a demodulation reference signal (DMRS), comprising:

• at least one processor, and one or more memories coupled to the at least one processor and storing computer instructions for execution by the at least one processor to configure the apparatus for:
• determining a time-frequency resource used to carry the DMRS, wherein the DMRS is carried on the time-frequency resource in at least one resource unit, wherein a total quantity of supported DMRS ports is six DMRS ports, the six DMRS ports are divided into three DMRS port groups, each DMRS port group comprises two DMRS ports, the three DMRS port groups comprise a first DMRS port group, a second DMRS port group, and a third DMRS port group, and a same time-frequency resource is multiplexed for the DMRS ports in each DMRS port group in a code division multiplexing (CDM) manner, wherein, in each resource unit, a time-frequency resource to which the first DMRS port group is mapped comprises a subcarrier 0, a subcarrier 1, a subcarrier 6, and a subcarrier 7 that are in a first symbol and a second symbol in a time domain, a time-frequency resource to which the second DMRS port group is mapped comprises a subcarrier 2, a subcarrier 3, a subcarrier 8, and a subcarrier 9 that are in the first symbol and the second symbol in the time domain, and a time-frequency resource to which the third DMRS port group is mapped comprises a subcarrier 4, a subcarrier 5, a subcarrier 10, and a subcarrier 11 that are in the first symbol and the second symbol in the time domain;
• and
• sending the DMRS by using the time-frequency resource.

An apparatus for obtaining a demodulation reference signal (DMRS), comprising:

• at least one processor, and one or more memories coupled to the at least one processor and storing computer instructions for execution by the at least one processor to configure the apparatus for:
• determining a time-frequency resource used to carry the DMRS, wherein the DMRS is carried on the time-frequency resource in at least one resource unit, wherein a total quantity of supported DMRS ports is six DMRS ports, the six DMRS ports are divided into three DMRS port groups, each DMRS port group comprises two DMRS ports, the three DMRS port groups comprise a first DMRS port group, a second DMRS port group, and a third DMRS port group, and a same time-frequency resource is multiplexed for the DMRS ports in each DMRS port group in a code division multiplexing (CDM) manner, wherein, in each resource unit, a time-frequency resource to which the first DMRS port group is mapped comprises a subcarrier 0, a subcarrier 1, a subcarrier 6, and a subcarrier 7 that are in a first symbol and a second symbol in a time domain, a time-frequency resource to which the second DMRS port group is mapped comprises a subcarrier 2, a subcarrier 3, a subcarrier 8, and a subcarrier 9 that are in the first symbol and the second symbol in the time domain, and a time-frequency resource to which the third DMRS port group is mapped comprises a subcarrier 4, a subcarrier 5, a subcarrier 10, and a subcarrier 11 that are in the first symbol and the second symbol in the time domain;
• and
• obtaining the DMRS by using the time-frequency resource.

An indication apparatus, comprising:

• at least one processor, and one or more memories coupled to the at least one processor and storing computer instructions for execution by the at least one processor to configure the apparatus for:
• generating indication information, wherein the indication information is used to indicate a time-frequency resource used to carry a demodulation reference signal (DMRS), wherein the DMRS is carried on the time-frequency resource in at least one resource unit, wherein a total quantity of supported DMRS ports is six DMRS ports, the six DMRS ports are divided into three DMRS port groups, each DMRS port group comprises two DMRS ports, the three DMRS port groups comprise a first DMRS port group, a second DMRS port group, and a third DMRS port group, and a same time-frequency resource is multiplexed for the DMRS ports in each DMRS port group in a code division multiplexing (CDM) manner, wherein, in each resource unit, a time-frequency resource to which the first DMRS port group is mapped comprises a subcarrier 0, a subcarrier 1, a subcarrier 6, and a subcarrier 7 that are in a first symbol and a second symbol in a time domain, a time-frequency resource to which the second DMRS port group is mapped comprises a subcarrier 2, a subcarrier 3, a subcarrier 8, and a subcarrier 9 that are in the first symbol and the second symbol in the time domain, and a time-frequency resource to which the third DMRS port group is mapped comprises a subcarrier 4, a subcarrier 5, a subcarrier 10, and a subcarrier 11 that are in the first symbol and the second symbol in the time domain;
• and
• sending the indication information.

An apparatus for determining a time-frequency resource, comprising:

• at least one processor, and one or more memories coupled to the at least one processor and storing computer instructions for execution by the at least one processor to configure the apparatus for:
• receiving indication information, wherein the indication information is used to indicate a time-frequency resource used to carry a demodulation reference signal (DMRS), wherein the DMRS is carried on the time-frequency resource in at least one resource unit, wherein a total quantity of supported DMRS ports is six DMRS ports, the six DMRS ports are divided into three DMRS port groups, each DMRS port group comprises two DMRS ports, the three DMRS port groups comprise a first DMRS port group, a second DMRS port group, and a third DMRS port group, and a same time-frequency resource is multiplexed for the DMRS ports in each DMRS port group in a code division multiplexing (CDM) manner, wherein, in each resource unit, a time-frequency resource to which the first DMRS port group is mapped comprises a subcarrier 0, a subcarrier 1, a subcarrier 6, and a subcarrier 7 that are in a first symbol and a second symbol in a time domain, a time-frequency resource to which the second DMRS port group is mapped comprises a subcarrier 2, a subcarrier 3, a subcarrier 8, and a subcarrier 9 that are in the first symbol and the second symbol in the time domain, and a time-frequency resource to which the third DMRS port group is mapped comprises a subcarrier 4, a subcarrier 5, a subcarrier 10, and a subcarrier 11 that are in the first symbol and the second symbol in the time domain;
• and
• determining the time-frequency resource based on the indication information.

A non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and when the computer instructions run on a computer, the computer performs steps comprising:

• determining a time-frequency resource used to carry a demodulation reference signal (DMRS), wherein the DMRS is carried on the time-frequency resource in at least one resource unit, wherein a total quantity of supported DMRS ports is six DMRS ports, the six DMRS ports are divided into three DMRS port groups, each DMRS port group comprises two DMRS ports, the three DMRS port groups comprise a first DMRS port group, a second DMRS port group, and a third DMRS port group, and a same time-frequency resource is multiplexed for the DMRS ports in each DMRS port group in a code division multiplexing (CDM) manner, wherein, in each resource unit, a time-frequency resource to which the first DMRS port group is mapped comprises a subcarrier 0, a subcarrier 1, a subcarrier 6, and a subcarrier 7 that are in a first symbol and a second symbol in a time domain, a time-frequency resource to which the second DMRS port group is mapped comprises a subcarrier 2, a subcarrier 3, a subcarrier 8, and a subcarrier 9 that are in the first symbol and the second symbol in the time domain, and a time-frequency resource to which the third DMRS port group is mapped comprises a subcarrier 4, a subcarrier 5, a subcarrier 10, and a subcarrier 11 that are in the first symbol and the second symbol in the time domain;
• and
• sending the DMRS by using the time-frequency resource.

A non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and when the computer instructions run on a computer, the computer performs steps comprising:

• determining a time-frequency resource used to carry a demodulation reference signal (DMRS), wherein the DMRS is carried on the time-frequency resource in at least one resource unit, wherein a total quantity of supported DMRS ports is six DMRS ports, the six DMRS ports are divided into three DMRS port groups, each DMRS port group comprises two DMRS ports, the three DMRS port groups comprise a first DMRS port group, a second DMRS port group, and a third DMRS port group, and a same time-frequency resource is multiplexed for the DMRS ports in each DMRS port group in a code division multiplexing (CDM) manner, wherein, in each resource unit, a time-frequency resource to which the first DMRS port group is mapped comprises a subcarrier 0, a subcarrier 1, a subcarrier 6, and a subcarrier 7 that are in a first symbol and a second symbol in a time domain, a time-frequency resource to which the second DMRS port group is mapped comprises a subcarrier 2, a subcarrier 3, a subcarrier 8, and a subcarrier 9 that are in the first symbol and the second symbol in the time domain, and a time-frequency resource to which the third DMRS port group is mapped comprises a subcarrier 4, a subcarrier 5, a subcarrier 10, and a subcarrier 11 that are in the first symbol and the second symbol in the time domain;
• and
• obtaining the DMRS by using the time-frequency resource.

A non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and when the computer instructions run on a computer, the computer performs steps comprising:

• generating indication information, wherein the indication information is used to indicate a time-frequency resource used to carry a demodulation reference signal (DMRS), wherein the DMRS is carried on the time-frequency resource in at least one resource unit, wherein a total quantity of supported DMRS ports is six DMRS ports, the six DMRS ports are divided into three DMRS port groups, each DMRS port group comprises two DMRS ports, the three DMRS port groups comprise a first DMRS port group, a second DMRS port group, and a third DMRS port group, and a same time-frequency resource is multiplexed for the DMRS ports in each DMRS port group in a code division multiplexing (CDM) manner, wherein, in each resource unit, a time-frequency resource to which the first DMRS port group is mapped comprises a subcarrier 0, a subcarrier 1, a subcarrier 6, and a subcarrier 7 that are in a first symbol and a second symbol in a time domain, a time-frequency resource to which the second DMRS port group is mapped comprises a subcarrier 2, a subcarrier 3, a subcarrier 8, and a subcarrier 9 that are in the first symbol and the second symbol in the time domain, and a time-frequency resource to which the third DMRS port group is mapped comprises a subcarrier 4, a subcarrier 5, a subcarrier 10, and a subcarrier 11 that are in the first symbol and the second symbol in the time domain;
• and
• sending the indication information.

A non-transitory computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the computer instructions run on a computer, the computer performs steps comprising:

• receiving indication information, wherein the indication information is used to indicate a time-frequency resource used to carry a demodulation reference signal (DMRS), wherein the DMRS is carried on the time-frequency resource in at least one resource unit, wherein a total quantity of supported DMRS ports is six DMRS ports, the six DMRS ports are divided into three DMRS port groups, each DMRS port group comprises two DMRS ports, the three DMRS port groups comprise a first DMRS port group, a second DMRS port group, and a third DMRS port group, and a same time-frequency resource is multiplexed for the DMRS ports in each DMRS port group in a code division multiplexing (CDM) manner, wherein, in each resource unit, a time-frequency resource to which the first DMRS port group is mapped comprises a subcarrier 0, a subcarrier 1, a subcarrier 6, and a subcarrier 7 that are in a first symbol and a second symbol in a time domain, a time-frequency resource to which the second DMRS port group is mapped comprises a subcarrier 2, a subcarrier 3, a subcarrier 8, and a subcarrier 9 that are in the first symbol and the second symbol in the time domain, and a time-frequency resource to which the third DMRS port group is mapped comprises a subcarrier 4, a subcarrier 5, a subcarrier 10, and a subcarrier 11 that are in the first symbol and the second symbol in the time domain;
• and
• determining the time-frequency resource based on the indication information.