WO2024061236A1 - Procédé pour envoyer et recevoir un signal de référence, et appareil de communication - Google Patents

Procédé pour envoyer et recevoir un signal de référence, et appareil de communication Download PDF

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Publication number
WO2024061236A1
WO2024061236A1 PCT/CN2023/119831 CN2023119831W WO2024061236A1 WO 2024061236 A1 WO2024061236 A1 WO 2024061236A1 CN 2023119831 W CN2023119831 W CN 2023119831W WO 2024061236 A1 WO2024061236 A1 WO 2024061236A1
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Prior art keywords
reference signal
dmrs
port
time
frequency resources
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PCT/CN2023/119831
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English (en)
Chinese (zh)
Inventor
董昶钊
高翔
刘鹍鹏
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华为技术有限公司
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Publication of WO2024061236A1 publication Critical patent/WO2024061236A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • Embodiments of the present application relate to the field of communications, and more specifically, to methods and communications devices for transmitting and receiving reference signals.
  • MIMO Multiple input multiple output
  • 5G fifth generation
  • DMRS demodulation reference signal
  • the transmit power of the reference signal is one of the factors that affects the accuracy of channel estimation. When the transmit power is larger, the accuracy of channel estimation is also higher.
  • the existing technology adopts the principle of full power utilization, that is, on the same time-frequency resource (for example, resource element (RE)),
  • the transmit power of the idle port is lent to the active port.
  • the relationship between the power borrowed by the active port from the idle port and the initial transmit power pre-configured by the network device to the active port can be determined by the power boosting value (or power compensation value, offset value) etc.) to express.
  • the power enhancement value corresponding to different ports is predefined in the new radio (NR) protocol, and the terminal device can determine the power enhancement value of each port according to the instructions of the network device.
  • NR new radio
  • Embodiments of the present application provide a method and communication device for transmitting and receiving reference signals, which can support more flexible indication of the power ratio of the reference signal port, thereby improving the transmission power of the reference signal.
  • the first aspect provides a method for sending a reference signal.
  • the method may be executed by a network device, or may be executed by a chip or circuit configured in the network device. This application is not limited to this.
  • the method includes a network device determining a power ratio ⁇ ; the network device sends a reference signal to a terminal device based on the power ratio ⁇ ; wherein the power ratio ⁇ is related to a first parameter, a configuration type of the reference signal and a first code division multiplexing CDM
  • the first parameter is associated with the first time-frequency resource occupied by the reference signal, and the first code division multiplexing CDM group is a CDM group that does not send data.
  • the network device can flexibly indicate the power ratio of the reference signal port, thereby improving the The transmit power used to send the reference signal.
  • the first parameter includes at least one of the following parameters: an index of the antenna port associated with the reference signal, an index of the time-frequency resource occupied by the reference signal, the The ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources occupied by the data corresponding to the reference signal.
  • the network device can use the index of the antenna port associated with the reference signal, the index of the time-frequency resource occupied by the reference signal, the number of time-frequency resources occupied by the reference signal and the time-frequency resource occupied by the data corresponding to the reference signal. At least one of the ratios of the numbers, the configuration type of the reference signal and the number of the first code division multiplexing CDM group can flexibly indicate the power ratio of the reference signal port, thereby improving the transmission power of sending the reference signal.
  • the reference signal is a first reference signal corresponding to a first port
  • the first port is a port in a first port set
  • the first port set is The ports correspond to N CDM groups, and the time-frequency resources corresponding to each CDM group in the N CDM groups do not overlap, and N is an integer greater than or equal to 3.
  • the ports in the first port set may be supported by a reference signal configuration type or reference signal pattern in the system. port.
  • the N is 3 or 4, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/4; or, the N is 4 or 5 or 6, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.
  • the value of N can be any one of 3, 4, 5 or 6, and for the case where there are reference signal ports with an occupied time-frequency resource density of 1/4 or 1/6 among the reference signal ports supported by the system, by associating the power ratio ⁇ with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM groups, the power ratio of the reference signal port can be indicated more flexibly.
  • the first port set also includes a second port, and the ratio of the number of time-frequency resources occupied by the second reference signal of the second port to the number of time-frequency resources occupied by data corresponding to the second reference signal is different from the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal.
  • the value of N is greater than or equal to 3, and there are reference signal ports occupying different density of time-frequency resources in the reference signal port, by dividing the power ratio ⁇ is associated with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM group, and can more flexibly indicate the power ratio of the reference signal port.
  • the first parameter further includes the value of N.
  • the currently scheduled reference signal includes an existing reference signal port
  • its power ratio can also be flexibly indicated.
  • the network device sends indication information to the terminal device, the indication information includes first indication information and second indication information, the first indication information indicates the reference signal Corresponding to the reference signal configuration type, the second indication information indicates the index of the antenna port associated with the reference signal.
  • the network device sends indication information to the terminal device, so that the terminal device can determine the power ratio of the reference signal port according to the indication information.
  • the network device determines a power scaling factor according to the power ratio ⁇ .
  • the network device is based on the power scaling factor Sending the reference signal to the terminal device; wherein the power ratio ⁇ and the power scaling factor Satisfies the following relationship:
  • w f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′
  • w t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′
  • c represents the expansion capability coefficient
  • r(2n+k′) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.
  • wf (k′) is the frequency domain mask element corresponding to the subcarrier indexed as k′
  • wt (l′) is the time domain mask element corresponding to the OFDM symbol indexed as l′
  • r(2n+k′) is the element of the base sequence mapped onto the kth subcarrier and the lth symbol.
  • the value of N may be greater than or equal to 3, and there are reference signal ports occupying different densities of time-frequency resources in the reference signal port, through
  • the network device can flexibly indicate the power ratio of the reference signal port, based on the power ratio and time-frequency resources
  • the mapping rule maps the reference signal to the corresponding time-frequency resource, and the reference signal is sent through the time-frequency resource.
  • the second aspect provides a method for receiving a reference signal.
  • the method may be executed by a terminal device, or may be executed by a chip or circuit configured in the terminal device. This application is not limited to this.
  • the method includes a terminal device determining a power ratio ⁇ ; the terminal device receiving a reference signal based on the power ratio ⁇ ; wherein the power ratio ⁇ is related to a first parameter, a configuration type of the reference signal and the number of first code division multiplexing CDM groups
  • the first parameter is associated with the first time-frequency resource occupied by the reference signal, and the first code division multiplexing CDM group is a CDM group that does not send data.
  • the terminal device can flexibly receive the reference signal according to the power ratio of the reference signal port.
  • the first parameter includes at least one of the following parameters: an index of the antenna port associated with the reference signal, an index of the time-frequency resource occupied by the reference signal, the The ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources occupied by the data corresponding to the reference signal.
  • the terminal device can use the index of the antenna port associated with the reference signal, the index of the time-frequency resource occupied by the reference signal, the number of time-frequency resources occupied by the reference signal and the time-frequency resource occupied by the data corresponding to the reference signal. At least one of the ratios of the numbers, the configuration type of the reference signal and the number of the first code division multiplexing CDM group, flexibly determine the power ratio of the reference signal port, and receive the reference signal.
  • the reference signal is a first reference signal corresponding to a first port
  • the first port is a port in the first port set
  • the first port set The ports correspond to N CDM groups
  • the N CDM The time-frequency resources corresponding to each CDM group in the group do not overlap, and N is an integer greater than or equal to 3.
  • N is 3 or 4, and the number of time-frequency resources occupied by the first reference signal is equal to the number of time-frequency resources occupied by the data corresponding to the first reference signal.
  • the ratio of the quantities is 1/4, or the N is 4 or 5 or 6.
  • the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.
  • the first port set further includes a second port, and the number of time-frequency resources occupied by the second reference signal of the second port corresponds to the second reference signal.
  • the ratio of the number of time-frequency resources occupied by the data is different from the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal.
  • the first parameter further includes the value of N.
  • the terminal device receives indication information from the network device, the indication information includes first indication information and second indication information, the first indication information indicates the reference The reference signal configuration type corresponding to the signal, the second indication information indicates the index of the antenna port associated with the reference signal; the terminal device determines the power according to the reference signal configuration type corresponding to the reference signal and the index of the antenna port associated with the reference signal Ratio ⁇ .
  • the terminal device determines the power scaling factor according to the power ratio ⁇
  • the end device is based on this power scaling factor Receive the reference signal; where, the power ratio ⁇ and the power scaling factor Satisfy the following relationship:
  • wf (k′) is the frequency domain mask element corresponding to the subcarrier indexed as k′
  • wt (l′) is the time domain mask element corresponding to the OFDM symbol indexed as l′
  • c represents the expansion capability coefficient
  • r(2n+k′) is the element of the base sequence mapped onto the kth subcarrier and the lth symbol.
  • w f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′
  • w t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′
  • r(2n+k′ ) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.
  • the terminal device when there are N CDM groups corresponding to the reference signal ports supported by the system, the value of N may be greater than or equal to 3, and there are reference signal ports with densities occupying different time-frequency resources among the reference signal ports, by associating the power ratio ⁇ with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM groups, the terminal device can flexibly determine the power ratio of the reference signal port, and receive the reference signal based on the power ratio and the time-frequency resource mapping rule.
  • a method for sending a reference signal is provided.
  • the method may be executed by a network device, or may be executed by a chip or circuit configured in the network device. This application is not limited to this.
  • the method includes: the network device generates a reference signal based on the power ratio ⁇ ; the network device sends the reference signal to the terminal device; wherein the reference signal includes a first reference signal corresponding to a first port, and the first port is a first port set A reference signal port in, the first port set corresponds to N CDM groups, N is an integer greater than or equal to 2, the N CDM groups include at least one type of CDM group; the power ratio ⁇ The number, the configuration type of the reference signal and the first parameter are associated.
  • the first CDM group is the CDM group that does not send data among the N CDM groups.
  • the first parameter includes each type of the at least one type of CDM. The number of ports corresponding to the CDM group.
  • the network device can more flexibly indicate the power ratio of the reference signal port, and then can Increase the transmit power of the reference signal.
  • the at least one type of CDM group includes a first type of CDM group and a second type of CDM group, and the first type of CDM group occupies a time-frequency
  • the density of resources is different from the density of time-frequency resources occupied by the second type of CDM group.
  • the first parameter includes the number n 1 of reference signal ports corresponding to the first type of CDM group and the number of reference signal ports corresponding to the second type of CDM group. The number of ports n 2 .
  • the reference signal port supported by the system correspond to N CDM groups, and there are reference signal ports occupying different time-frequency resource densities in the reference signal ports, by comparing the power ratio ⁇ with the first parameter, the reference signal port
  • the configuration type of the signal is related to the number of the first code division multiplexing CDM group, which can more flexibly indicate the power ratio of the reference signal port.
  • N is 3 or 4, and the number of time-frequency resources occupied by the first reference signal is equal to the number of time-frequency resources occupied by data corresponding to the first reference signal.
  • the ratio of the quantities is 1/4, or the N is 4 or 5 or 6.
  • the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.
  • the network device sends indication information to the terminal device, the indication information includes first indication information and second indication information, the first indication information indicates the reference signal Corresponding to the reference signal configuration type, the second indication information indicates the index of the antenna port associated with the reference signal.
  • the network device sends indication information to the terminal device, so that the terminal device can determine the power ratio of the reference signal port according to the indication information.
  • the network device determines the power scaling factor according to the power ratio ⁇ The network device is based on this power scaling factor Send the reference signal to the terminal device; where the power ratio ⁇ and the power scaling factor Satisfy the following relationship:
  • w f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′
  • w t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′
  • c represents the expansion capability coefficient
  • r(2n+k′) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.
  • wf (k′) is the frequency domain mask element corresponding to the subcarrier indexed as k′
  • wt (l′) is the time domain mask element corresponding to the OFDM symbol indexed as l′
  • r(2n+k′) is the element of the base sequence mapped onto the kth subcarrier and the lth symbol.
  • the network device when there are N CDM groups corresponding to the reference signal ports supported by the system, the value of N may be greater than or equal to 3, and there are reference signal ports with densities occupying different time-frequency resources among the reference signal ports, by associating the power ratio ⁇ with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM groups, the network device can flexibly indicate the power ratio of the reference signal port, map the reference signal to the corresponding time-frequency resource based on the power ratio and the time-frequency resource mapping rule, and send the reference signal through the time-frequency resource.
  • the fourth aspect provides a method for receiving a reference signal.
  • the method may be executed by a terminal device, or may be executed by a chip or circuit configured in the terminal device. This application is not limited to this.
  • the method includes: a terminal device determines a power ratio ⁇ ; the terminal device receives a reference signal based on the power ratio ⁇ ; wherein the reference signal includes a first reference signal corresponding to a first port, and the first port is a first port in the first port set.
  • a reference signal port, the first port set corresponds to N CDM groups, N is an integer greater than or equal to 2, and the N CDM groups include at least one type of CDM group; the power ratio ⁇ is associated with the number of the first CDM group, the configuration type of the reference signal and the first parameter.
  • the first CDM group is a CDM group that does not send data among the N CDM groups.
  • the first parameter includes the The number of ports corresponding to each type of CDM group in at least one type of CDM.
  • the terminal device can flexibly receive the reference signal according to the power ratio of the reference signal port.
  • the at least one type of CDM group includes a first type of CDM group and a second type of CDM group, and the first type of CDM group occupies a time-frequency
  • the density of resources is different from the density of time-frequency resources occupied by the second type of CDM group.
  • the first parameter includes the number n 1 of reference signal ports corresponding to the first type of CDM group and the number of reference signal ports corresponding to the second type of CDM group. The number of ports n 2 .
  • the power ratio of the reference signal port can be flexibly indicated.
  • N is 3 or 4, and the number of time-frequency resources occupied by the first reference signal is equal to the number of time-frequency resources occupied by data corresponding to the first reference signal.
  • the ratio of the quantities is 1/4, or the N is 4 or 5 or 6.
  • the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.
  • the terminal device receives indication information from the network device, the indication information includes first indication information and second indication information, the first indication information indicates the reference signal Corresponding reference signal configuration type, the second indication information indicates the index of the antenna port associated with the reference signal; the terminal device determines the first parameter according to the index of the antenna port associated with the reference signal, and determines the first parameter according to the first parameter, the reference signal
  • the configuration type and the number of the first CDM group determine the power ratio.
  • the network device sends indication information to the terminal device, so that the terminal device can determine the power ratio of the reference signal port according to the indication information.
  • the terminal device determines the power scaling factor according to the power ratio ⁇ and based on Receive the reference signal; where, the power ratio ⁇ and the power scaling factor Satisfy the following relationship:
  • w f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′
  • w t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′
  • c represents the expansion capability coefficient
  • r(2n+k′) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol white.
  • w f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′
  • w t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′
  • r(2n+k′ ) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.
  • the terminal device can flexibly determine the power ratio of the reference signal port based on the power ratio and time-frequency resources. Mapping rules receive reference signals.
  • a communication device in a fifth aspect, includes a processing unit and a transceiver unit.
  • the processing unit is used to determine the power ratio ⁇ ; the transceiver unit is used to send a reference signal to the terminal device based on the power ratio ⁇ ; wherein,
  • the power ratio ⁇ is associated with a first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM group.
  • the first parameter is associated with the first time-frequency resource occupied by the reference signal.
  • the first A code division multiplexing CDM group is a CDM group that does not send data.
  • the first parameter includes at least one of the following parameters: an index of the antenna port associated with the reference signal, an index of the time-frequency resource occupied by the reference signal, the The ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources occupied by the data corresponding to the reference signal.
  • the reference signal is a first reference signal corresponding to a first port
  • the first port is a port in the first port set
  • the first port set is The ports correspond to N CDM groups, and the time-frequency resources corresponding to each CDM group in the N CDM groups do not overlap, and N is an integer greater than or equal to 3.
  • the N is 3 or 4, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/4; or, the N is 4 or 5 or 6, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.
  • the first port set further includes a second port, and the number of time-frequency resources occupied by the second reference signal of the second port corresponds to the second reference signal.
  • the ratio of the number of time-frequency resources occupied by the data is different from the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal.
  • the first parameter further includes the value of N.
  • the transceiver unit is also used to send indication information to the terminal device, the indication information including first indication information and second indication information, the first indication information indicating the reference signal configuration type corresponding to the reference signal, and the second indication information indicating the index of the antenna port associated with the reference signal.
  • the processing unit is specifically configured to determine the power scaling factor according to the power ratio ⁇
  • the transceiver unit is specifically configured to based on the power scaling factor Send the reference signal to the terminal device; , the power ratio ⁇ and the power scaling factor Satisfy the following relationship:
  • a communication device in a sixth aspect, includes a processing unit and a transceiver unit.
  • the processing unit is used to determine the power ratio ⁇ ; the transceiver unit is used to receive a reference signal based on the power ratio ⁇ ; wherein the power ratio ⁇ Associated with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM group, the first parameter is associated with the first time-frequency resource occupied by the reference signal, the first code division multiplexing
  • the CDM group is a CDM group that does not send data.
  • the first parameter includes at least one of the following parameters: an index of the antenna port associated with the reference signal, an index of the time-frequency resource occupied by the reference signal, the The ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources occupied by the data corresponding to the reference signal.
  • the reference signal is a first reference signal corresponding to a first port
  • the first port is a port in the first port set
  • the first port set is The ports correspond to N CDM groups, and the time-frequency resources corresponding to each CDM group in the N CDM groups do not overlap, and N is an integer greater than or equal to 3.
  • N is 3 or 4, and the number of time-frequency resources occupied by the first reference signal is equal to the number of time-frequency resources occupied by data corresponding to the first reference signal.
  • the ratio of the quantities is 1/4, or the N is 4 or 5 or 6.
  • the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.
  • the first port set further includes a second port, and the number of time-frequency resources occupied by the second reference signal of the second port corresponds to the second reference signal.
  • the ratio of the number of time-frequency resources occupied by the data is different from the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal.
  • the first parameter further includes the value of N.
  • the transceiver unit is further configured to receive indication information from the network device, where the indication information includes first indication information and second indication information, the first indication The information indicates the reference signal configuration type corresponding to the reference signal, and the second indication information indicates the index of the antenna port associated with the reference signal; the processing unit is specifically configured to: according to the reference signal configuration type corresponding to the reference signal and the reference signal association The index of the antenna port determines the power ratio ⁇ .
  • the processing unit is specifically configured to determine a power scaling factor according to the power ratio ⁇ .
  • the transceiver unit is specifically configured to: Receive the reference signal; wherein the power ratio ⁇ and the power scaling factor Satisfies the following relationship:
  • a communication device in a seventh aspect, includes a processing unit and a transceiver unit.
  • the processing unit is used to generate a reference signal based on the power ratio ⁇ ; the transceiver unit is used to send the reference signal to a terminal device; wherein, the reference The signal includes a first reference signal corresponding to a first port.
  • the first port is a reference signal port in a first port set.
  • the first port set corresponds to N CDM groups.
  • N is an integer greater than or equal to 2.
  • the N The CDM groups include at least one type of CDM group; the power ratio ⁇ is associated with the number of the first CDM group, the configuration type of the reference signal and the first parameter.
  • the first CDM group is the N CDM group in which no data is sent.
  • CDM group, the first parameter includes the number of ports corresponding to each type of CDM group in the at least one type of CDM.
  • the at least one type of CDM group includes a first type of CDM group and a second type of CDM group, and the first type of CDM group occupies a time-frequency
  • the density of resources is different from the density of time-frequency resources occupied by the second type of CDM group.
  • the first parameter includes the number n 1 of reference signal ports corresponding to the first type of CDM group and the number of reference signal ports corresponding to the second type of CDM group. The number of ports n 2 .
  • N is 3 or 4, and the number of time-frequency resources occupied by the first reference signal is equal to the number of time-frequency resources occupied by data corresponding to the first reference signal.
  • the ratio of the quantities is 1/4, or the N is 4 or 5 or 6.
  • the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.
  • the transceiver unit is further configured to send indication information to the terminal device, where the indication information includes first indication information and second indication information, and the first indication information indicates The reference signal configuration type corresponding to the reference signal, and the second indication information indicates the index of the antenna port associated with the reference signal.
  • the processing unit is specifically configured to determine the power scaling factor according to the power ratio ⁇
  • the transceiver unit is specifically configured to based on the power scaling factor Send the reference signal to the terminal device; where the power ratio ⁇ and the power scaling factor Satisfy the following relationship:
  • a communication device in an eighth aspect, includes a processing unit and a transceiver unit.
  • the processing unit is used to determine the power ratio ⁇ ; the transceiver unit is used to receive a reference signal based on the power ratio ⁇ ; wherein the reference signal includes The first reference signal corresponding to the first port.
  • the first port is a reference signal port in the first port set.
  • the first port set corresponds to N CDM groups. N is an integer greater than or equal to 2.
  • the group includes at least one type of CDM group; the power ratio ⁇ is associated with the number of the first CDM group, the configuration type of the reference signal and the first parameter.
  • the first CDM group is a CDM that does not send data among the N CDM groups. group, the first parameter includes the number of ports corresponding to each type of CDM group in the at least one type of CDM.
  • the at least one type of CDM group includes a first type of CDM group and a second type of CDM group, and the first type of CDM group occupies a time-frequency
  • the density of resources is different from the density of time-frequency resources occupied by the second type of CDM group.
  • the first parameter includes the number n 1 of reference signal ports corresponding to the first type of CDM group and the number of reference signal ports corresponding to the second type of CDM group. The number of ports n 2 .
  • N is 3 or 4, and the number of time-frequency resources occupied by the first reference signal is equal to the number of time-frequency resources occupied by data corresponding to the first reference signal.
  • the ratio of the quantities is 1/4, or the N is 4 or 5 or 6.
  • the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.
  • the transceiver unit is further configured to receive indication information from the network device, where the indication information includes first indication information and second indication information, and the first indication information indicates The reference signal configuration type corresponding to the reference signal, the second indication information indicates the index of the antenna port associated with the reference signal; the terminal device determines the first parameter according to the index of the antenna port associated with the reference signal, and determines the first parameter according to the first parameter , the configuration type of the reference signal and the number of the first CDM group determine the power ratio.
  • the processing unit is specifically configured to determine the power scaling factor according to the power ratio ⁇
  • the transceiver unit is specifically used according to Receive the reference signal; where, the power ratio ⁇ and the power scaling factor Satisfy the following relationship:
  • a communication device including a processor.
  • the processor is coupled to the memory and can be used to execute instructions in the memory to implement the method in any of the above first aspect, the third aspect and any possible implementation manner of the first aspect or the third aspect.
  • the communication device further includes a memory.
  • the communication device also includes a communication interface, and the processor is coupled to the communication interface.
  • the communication device is a network device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the communication device is a chip configured in a network device.
  • the communication interface may be an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a communication device including a processor.
  • the processor is coupled to the memory and can be used to execute instructions in the memory to implement the method in any of the above second aspect, the fourth aspect, and any possible implementation manner of the second aspect or the fourth aspect.
  • the communication device further includes a memory.
  • the communication device also includes a communication interface, and the processor is coupled to the communication interface.
  • the communication device is a terminal device.
  • the communication interface may be a transceiver or an input/output interface.
  • the communication device is a chip configured in a terminal device.
  • the communication interface may be an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a processor including: an input circuit, an output circuit and a processing circuit.
  • the processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any possible implementation manner of the first to fourth aspects.
  • the above-mentioned processor can be one or more chips
  • the input circuit can be an input pin
  • the output circuit can be As an output pin
  • the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, the receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by the transmitter, and the input circuit and the output A circuit may be the same circuit that functions as an input circuit and an output circuit at different times.
  • the embodiments of this application do not limit the specific implementation methods of the processor and various circuits.
  • a processing device including a processor and a memory.
  • the processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute the method in any possible implementation manner of the first to fourth aspects.
  • processors there are one or more processors and one or more memories.
  • the memory may be integrated with the processor, or the memory may be provided separately from the processor.
  • the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated on the same chip as the processor, or can be set in different On the chip, the embodiment of the present application does not limit the type of memory and the arrangement of the memory and the processor.
  • ROM read-only memory
  • sending instruction information may be a process of outputting instruction information from the processor
  • receiving capability information may be a process of the processor receiving input capability information.
  • the data output by the processor can be output to the transmitter, and the input data received by the processor can be from the receiver.
  • the transmitter and receiver can be collectively called a transceiver.
  • the processing device in the above-mentioned twelfth aspect may be one or more chips.
  • the processor in the processing device can be implemented by hardware or software.
  • the processor can be a logic circuit, an integrated circuit, etc.;
  • the processor can be a general processor, which is implemented by reading software codes stored in a memory, and the memory can Integrated in the processor, it can be located outside the processor and exist independently.
  • a computer program product includes: a computer program (which may also be called a code, or an instruction).
  • a computer program which may also be called a code, or an instruction.
  • the computer program When the computer program is run, it causes the computer to execute the above-mentioned first aspect to A method in any possible implementation manner of the fourth aspect.
  • a computer-readable storage medium stores a computer program (which may also be called a code, or an instruction) when it is run on a computer, so that the above-mentioned first aspect is achieved.
  • the method in any possible implementation manner of the fourth aspect is executed.
  • a communication system including at least one terminal device and at least one network device, for performing the method in any possible implementation manner of the first to fourth aspects.
  • Figure 1 is a schematic diagram of a communication system to which the method of the embodiment of the present application is applicable.
  • Figure 2 is a reference signal pattern for two configuration types in the current standard.
  • Figure 3 is a schematic flow chart of a method for sending reference signals provided by an embodiment of the present application.
  • FIGS 4 to 7 show several examples of reference signal patterns provided by embodiments of the present application.
  • FIG. 8 is a schematic flowchart of another method of sending reference signals provided by an embodiment of the present application.
  • Figure 9 is a schematic diagram of a communication device provided by an embodiment of the present application.
  • Figure 10 is a schematic diagram of another communication device provided by an embodiment of the present application.
  • Figure 11 is a schematic block diagram of a network device according to an embodiment of the present application.
  • Figure 12 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems, such as fifth generation ( 5th generation, 5G) systems or new radio (NR), evolved packet core (EPC) , evolved packet system (EPS), evolved universal mobile telecommunication system (UMTS), evolved UMTS terrestrial radio access network (E-UTRAN), long term evolution (long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc.
  • 5th generation, 5G systems or new radio (NR) evolved packet core (EPC) , evolved packet system (EPS), evolved universal mobile telecommunication system (UMTS), evolved UMTS terrestrial radio access network (E-UTRAN), long term evolution (long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc.
  • 5G fifth generation
  • NR new radio
  • EPC evolved packet core
  • EPS evolved packet system
  • UMTS evolved universal mobile telecommunication system
  • E-UTRAN evolved UM
  • D2D device-to-device
  • V2X vehicle-to-everything
  • M2M machine-to-machine
  • MTC machine type communication
  • IoT Internet of things
  • the terminal equipment in the embodiment of this application may be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless Communication equipment, user agent or user device.
  • UE user equipment
  • access terminal user unit
  • user station mobile station
  • mobile station mobile station
  • remote station remote terminal
  • mobile device user terminal
  • terminal wireless Communication equipment
  • user agent user device
  • the terminal device may be a device that provides voice/data to users, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc.
  • some terminals can be, for example: mobile phones, tablets, laptops, PDAs, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, and smart grids Wireless terminals, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocols , SIP) telephone, wireless local loop (WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, which can Wearable devices, terminal devices in the 5G network or terminal devices in the future evolved public land mobile communication network (public land mobile network, PLMN), etc., are not limited in the embodiments of this application.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices.
  • Wearable devices can be a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing, and shoes.
  • a wearable device is a portable device that can be worn directly on the body or integrated into the user's clothing or accessories.
  • Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones.
  • the terminal device may also be a terminal device in the IoT system.
  • IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing human-machine Interconnection, an intelligent network that interconnects things.
  • terminal equipment can also include sensors such as smart printers, train detectors, and gas stations. Its main functions include collecting data (some terminal equipment), receiving control information and downlink data from network equipment, and sending electromagnetic waves to transmit uplink data to network equipment. .
  • the network device in the embodiment of the present application may be a device used to communicate with a terminal device.
  • the network device may be a next-generation base station (gNodeB, gNB) in a 5G communication system, a next-generation base station in a 6G mobile communication system, or a future mobile Base stations in communication systems or access nodes in WiFi systems, etc., evolved node B (evolved node B, eNB), wireless network controller (radio network controller, RNC), node B (node B, NB) in LTE systems ), base station controller (BSC), home base station (e.g., home evolved NodeB, or home Node B, HNB), base band unit (BBU), transmission reception point (TRP) , transmitting point (TP), base transceiver station (BTS), etc.
  • gNodeB, gNB next-generation base station
  • gNodeB next-generation base station
  • gNodeB next-generation base station
  • gNodeB next-
  • the network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node, or a control plane CU node and a user plane CU node, and a RAN device of a DU node.
  • the network device may provide services for a cell, and a terminal device communicates with a base station through the transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell.
  • the cell may be a cell corresponding to a base station (e.g., a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell.
  • the small cell here may include: a metro cell, a micro cell, a pico cell, a femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • the network device can be a macro base station, a micro base station or an indoor station, a relay node or a donor node, a device that provides wireless communication services to user devices in a V2X communication system, a wireless controller in a cloud radio access network (CRAN) scenario, a relay station, a vehicle-mounted device, a wearable device, and a network device in a future evolution network.
  • CRAN cloud radio access network
  • the embodiments of the present application are related to network devices. The specific technology and equipment used are not limited.
  • the terminal device or the network device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • This hardware layer includes hardware such as central processing unit (CPU), memory management unit (MMU) and memory (also called main memory).
  • the operating system can be any one or more computer operating systems that implement business processing through processes, such as Linux operating system, Unix operating system, Android operating system, iOS operating system or windows operating system, etc.
  • This application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the present application do not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the present application can be run to provide according to the embodiment of the present application.
  • the execution subject of the method provided by the embodiment of the present application can be a terminal device or a network device, or a functional module in the terminal device or network device that can call a program and execute the program.
  • FIG. 1 is an exemplary architectural diagram of a communication system 100 suitable for embodiments of the present application.
  • the communication system 100 may include at least one network device, such as the network device 101 shown in FIG. 1 .
  • the communication system 100 may also include at least one terminal device, such as the terminal devices 102 to 107 shown in FIG. 1 .
  • the terminal devices 102 to 107 can be mobile or fixed.
  • the network device 101 may provide communication coverage for a specific geographical area, and the terminal devices 102 to 107 may be terminal devices located within the coverage area.
  • Network device 101 and one or more of terminal devices 102 to 107 may each communicate via wireless links.
  • the terminal devices may communicate directly with each other.
  • direct communication between the terminal devices may be achieved using device to device (D2D) technology.
  • D2D device to device
  • the terminal device 105 and the terminal device 106, and the terminal device 105 and the terminal device 107 may communicate directly using D2D technology.
  • the terminal device 106 and the terminal device 107 may communicate with the terminal device 105 individually or simultaneously.
  • the terminal devices 105 to 107 can also communicate with the network device 101 respectively. For example, it can directly communicate with the network device 101.
  • the terminal devices 105 and 106 in the figure can communicate directly with the network device 101; it can also communicate with the network device 101 indirectly, such as the terminal device 107 in the figure communicates with the network device via the terminal device 105. 101 Communication.
  • Each communication device in the communication system 100 shown in Figure 1 can be configured with multiple antennas.
  • the plurality of antennas configured may include at least one transmitting antenna for transmitting signals and at least one receiving antenna for receiving signals. Therefore, communication devices in the communication system 100 can communicate with each other through MIMO technology.
  • FIG. 1 is only a simplified schematic diagram for ease of understanding.
  • the communication system 100 may also include other network devices or other terminal devices, which are not shown in FIG. 1 .
  • Antenna ports are referred to as ports. It can be understood as a transmitting antenna recognized by the receiving end, or a transmitting antenna that can be distinguished in space.
  • An antenna port can be configured for each virtual antenna, and each virtual antenna can be a weighted combination of multiple physical antennas. According to the different signals carried, antenna ports can be divided into reference signal ports and data ports. Among them, the reference signal port may include but is not limited to a DMRS port, a channel state information reference signal (channel state information reference signal, CSI-RS) port, etc.
  • This application includes existing ports and newly added ports.
  • Existing ports refer to ports in existing protocols, or ports that support technical solutions in existing protocols;
  • newly added ports refer to ports that can support the technical solutions of this application.
  • time-frequency resources may include resources in the time domain and resources in the frequency domain.
  • time-frequency resources may include one or more time domain units (may also be called time units, time units, etc.); in the frequency domain, time-frequency resources may include one or more frequency domain units.
  • a time domain unit can be one symbol or several symbols (such as OFDM symbols), or a time slot (slot), or a mini-slot (mini-slot), or a subframe (subframe).
  • a time slot may be composed of 7 or 14 symbols;
  • a mini-slot may include at least one symbol (for example, 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols) ;
  • the duration of a subframe in the time domain may be 1 millisecond (ms).
  • a frequency domain unit can be a resource block (RB), a subcarrier, a resource block group (RBG), a predefined subband, or a precoding resource.
  • block group precoding resource block group (PRG), a bandwidth part (BWP), a resource element (RE) (also called a resource unit or resource particle), or a carrier, or a serving cell.
  • PRG resource block group
  • BWP bandwidth part
  • RE resource element
  • DMRS Demodulation reference signal
  • DMRS is used for data channels, such as physical uplink share channel (PUSCH) or control channels, such as physical downlink control channel (PDCCH), etc.
  • PUSCH physical uplink share channel
  • PDCCH physical downlink control channel
  • Effective channel matrix estimation is used for detection and demodulation of data on the corresponding channel.
  • DMRS is usually precoded the same as the transmitted data signal, thereby ensuring that DMRS and data signals experience the same equivalent channel.
  • the DMRS vector sent by the transmitter is s
  • the data signal vector sent is x
  • the DMRS and data signals are precoded the same (multiplied by the same precoding matrix).
  • n represents additive noise.
  • the receiving end uses channel estimation algorithms, such as least square (LS) channel estimation, minimum mean square error (MMSE) channel estimation, etc., to obtain the equivalent channel estimate.
  • LS least square
  • MMSE minimum mean square error
  • Demodulation of the data signal can be completed based on the equivalent channel.
  • the transmitter can transmit multiple streams of data on the same time-frequency resources, and the receiver can recover all data.
  • DMRS is used to estimate the equivalent channel matrix, and its dimension can be NR ⁇ R, where NR represents the number of receiving antennas and R represents the number of transmission streams (also called the number of transmission layers and the number of spatial layers).
  • NR represents the number of receiving antennas
  • R represents the number of transmission streams (also called the number of transmission layers and the number of spatial layers).
  • one DMRS port corresponds to one transmission stream, that is, for MIMO transmission with R transmission streams, the required number of DMRS ports is R.
  • the DMRS ports corresponding to multiple transmission streams are orthogonal ports.
  • multiple DMRS need to be sent on multiple time-frequency resources.
  • Multiple DMRS corresponding to one port correspond to one DMRS sequence.
  • a DMRS sequence includes multiple DMRS sequence elements.
  • the nth DMRS sequence element in the DMRS sequence r l (n) can be generated by the following formula:
  • c(n) is a pseudo-random sequence
  • N C 1600
  • l represents the index value of an OFDM symbol in a time slot; is the number of symbols contained in a time slot; is a time slot index within a system frame; It is an initialization parameter, and its value can be 0 or 1; It can be configured by high-level signaling, which is related to the cell (identifier, ID), and can usually be equal to the cell ID; ⁇ represents the code division multiplexing (code division multiplexing, CDM) group (group) index corresponding to the DMRS port.
  • CDM code division multiplexing
  • the DMRS sequence corresponding to a DMRS port can be mapped to the corresponding time-frequency resource through the preset time-frequency resource mapping rules.
  • antenna port p corresponding to DMRS port p
  • the m-th sequence element r(m) in the corresponding DMRS sequence can be calculated according to the public
  • the mapping rule shown in Equation (6) is mapped to the RE with index (k, l) p, ⁇ :
  • the RE with index (k,l) p, ⁇ corresponds to the OFDM symbol with index l in a time slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain.
  • ⁇ is the subcarrier spacing; is the index of the starting OFDM symbol occupied by the DMRS modulation symbol or the index of the reference OFDM symbol; is a power scaling factor;
  • w f (k′) is a frequency domain mask element corresponding to a subcarrier indexed as k′
  • w t (l′) is a time domain mask element corresponding to an OFDM symbol indexed as l′
  • m 2n+
  • the values of w f (k′), w t (l′), and ⁇ corresponding to DMRS port p can be found in Table 1 or TS 38.211 Section 6.4.1.1.3.
  • the values of w f (k′), w t (l′), and ⁇ corresponding to DMRS port p can be determined according to Table 2.
  • ⁇ represents the index of the CDM group, and the DMRS ports in the same CDM group occupy the same time-frequency resources.
  • Figure 2 shows DMRS patterns for two configuration types.
  • REs with different filling patterns in Figure 2 represent different CDM groups;
  • P0, P1,..., P11 represent DMRS port 0 to DMRS port 11;
  • the numbers on the horizontal axis represent the index of the symbol in a time slot, and the numbers on the vertical axis represent The index of the subcarrier within an RB.
  • DMRS occupied symbol 0 and occupied symbols 0 and 1 in Figure 2 are only examples, and the symbols occupied by DMRS in one time slot may also be other symbols, such as occupied symbol 1, or occupied symbols 1 and 2.
  • CDM group 0 includes DMRS ports P0 and P1
  • CDM group 1 includes P2 and P3.
  • the CDM groups are Frequency Division Multiplexing (FDM) (mapped on different frequency domain resources); the DMRS ports included in the CMD group are mapped on the same time domain resources (in the frequency domain in the form of comb teeth). method for resource mapping).
  • FDM Frequency Division Multiplexing
  • the reference signals corresponding to the DMRS ports contained in the CDM group are distinguished by orthogonal cover codes (OCC), thereby ensuring the orthogonality of the DMRS ports in the CDM group.
  • the dual-symbol DMRS configuration type 1 supports up to 8 orthogonal DMRS ports.
  • the 8 DMRS ports belong to 2 CDM groups (CDM group 0 and CDM group 1).
  • CDM group0 includes P0, P1, P4 and P5
  • CDM group 1 includes P2, P3, P6 and P7.
  • P0, P1, P4 and P5 are located in the same RE, and resource mapping is performed in the frequency domain in a comb-tooth manner.
  • P2, P3, P6 and P7 are located in the same RE and are mapped on the unoccupied subcarriers of P0, P1, P4 and P5 in a comb-tooth manner in the frequency domain.
  • the occupied two adjacent subcarriers and two OFDM symbols correspond to an OCC sequence of length 4 (can be obtained by referring to Table 1).
  • (c) and (d) of Figure 2 respectively correspond to the time-frequency resource mapping methods of single-symbol DMRS and dual-symbol DMRS of configuration type 2.
  • configuration type 2 single-symbol DMRS supports up to 6 orthogonal DMRS ports.
  • the 6 DMRS ports belong to 3 CDM groups (CDM group 0, CDM group 1 and CDM group 2).
  • CDM groups CDM group 0, CDM group 1 and CDM group 2
  • (d) of Figure 2 for dual-symbol DMRS configuration type 2, up to 12 orthogonal DMRS ports are supported.
  • the 12 DMRS ports belong to 3 CDM groups (CDM group 0, CDM group 1 and CDM group 2).
  • the introduction of the CDM group with configuration type 2DMRS and the time-frequency resources occupied by each DMRS port is omitted here.
  • the network device needs to notify the terminal device of the assigned antenna port (DMRS port) and the DMRS configuration type. Therefore, the terminal device can perform the DMRS signal reception and channel estimation process in the corresponding time-frequency resources based on the allocated antenna port and in accordance with the DMRS symbol generation method and time-frequency resource mapping rules defined by the protocol.
  • the NR protocol defines semi-static configuration of DMRS type through high-level signaling (for example, radio resource control (RRC) signaling), and dynamic notification of allocated DMRS port index through downlink control information (DCI).
  • RRC radio resource control
  • DCI downlink control information
  • the network device configures the configuration type of DMRS through high-level signaling DMRS-DownlinkConfig, where the dmrs-Type field can be used to indicate whether it is type 1 or type 2 DMRS; the maxLength field can be used to indicate whether single-symbol DMRS or dual-symbol DMRS is used.
  • Symbol DMRS If maxLength is configured as len2, DCI can be used to further indicate whether single-symbol DMRS or dual-symbol DMRS is used; if the maxLength field is not configured, single-symbol DMRS is used.
  • DCI signaling contains the Antenna port field, which can be used to indicate the allocated DMRS port index.
  • Configuration table of DMRS port calling method indicates the "index value" column in the table, and each index value corresponds to one or more DMRS ports.
  • the terminal device can determine the following information through the DCI signaling sent by the network device and combined with Table 3 to Table 6:
  • the number of symbols occupied by DMRS can be indicated by the "Number of leading symbols" column in the table.
  • the value of the "Number of leading symbols” column is 1, it can mean that the number of symbols occupied by DMRS is 1, or in other words, it means that the DMRS It is a single-symbol DMRS; when the value of the "number of leading symbols” column is 2, it means that the number of symbols occupied by the DMRS is 2, or in other words, it means that the DMRS is a dual-symbol DMRS.
  • the number of CDM groups that do not transmit data can be indicated by the "number of DMRS code division multiplexing CDM groups that do not transmit data" column in Table 3 to Table 6. According to different DMRS configuration types, this field can take three values: 1, 2, and 3.
  • the value when the value is 1, it can indicate that the RE of the current CDM group 0 does not send data. For example, if the current timeslot schedules a port belonging to CDM group 0, then the RE of the current CDM group 0 does not send data, and the REs that are not mapped to DMRS on the symbols occupied by the currently scheduled DMRS can be scheduled for data; when the value is 2 , it can mean that the REs of the current CDM group 0 and CDM group1 do not send data; when the value is 3, it means that the REs of the current CDM group 0, CDM group 1 and CDM group 2 do not send data.
  • network equipment and terminal equipment can determine the power ratio ⁇ DMRS of the DMRS port based on the “number of DMRS code division multiplexing CDM groups that do not send data”.
  • ⁇ DMRS may represent the ratio of the energy of data (eg, PDSCH) on each RE to the energy of DMRS on each RE.
  • ⁇ DMRS can represent the ratio of the energy on each RE carrying data to the energy on each RE carrying DMRS.
  • the energy on RE can also be replaced by the power on RE.
  • the protocol indicates the corresponding relationship between "the number of DMRS code division multiplexing CDM groups that do not send data" and ⁇ DMRS .
  • the value of ⁇ DMRS can be 0, -3, -4.77dB, corresponding to the power increase of 0dB, 3dB or 4.77dB for each RE carrying DMRS to each RE carrying PDSCH. .
  • the network device can further determine the power scaling factor based on the value of ⁇ DMRS The value of , as shown in formula (7):
  • network equipment can be based on The value of In other words, network equipment is based on Generate DMRS sequence.
  • the number of transmission layers of data streams increases, and the corresponding number of DMRS ports also needs to increase, that is, the DMRS ports supported by the current system need to be expanded.
  • Expanding the DMRS port can be implemented, for example, through frequency division multiplexing, that is, frequency domain resources of the existing DMRS port are multiplexed to the new DMRS port.
  • the DMRS port expansion scheme if the power ratio ⁇ DMRS of each DMRS port is indicated according to the method defined in the above NR protocol, the indication is not flexible enough.
  • the density of time-frequency resources occupied by a new DMRS port and an existing DMRS port may be different, and the power ratio ⁇ DMRS of DMRS ports occupying different time-frequency resource densities may be different.
  • the power ratio ⁇ DMRS of the existing DMRS ports may be different from that indicated in the NR protocol; secondly, the expanded DMRS ports (including existing DMRS ports and new (Add DMRS port)
  • the number of corresponding CDM groups may be greater than 3.
  • the current protocol does not currently support indicating the power ratio of the DMRS port in the above situation.
  • this application provides a method for transmitting and receiving reference signals by flexibly indicating the power of each reference signal port.
  • the ratio can increase the reference signal power of each reference signal port and improve the utilization of the reference signal transmission power.
  • the symbol in this application refers to the OFDM symbol.
  • symbol x in “symbol x” below represents the index of the symbol within a scheduling time unit. That is, “symbol x" represents the symbol with index x within one scheduling time unit. For example, symbol 0 represents the symbol with index 0 within a scheduling time unit.
  • DMRS port (Port)x represents the index of the DMRS port (or DMRS port number), that is, “DMRS port x" represents the DMRS port with index x.
  • DMRS port 0 represents the DMRS port with index 0.
  • the index of the symbol and the index of the DMRS port may start from 0 or 1, or other numbers, which is not limited in this application.
  • the index of the symbol and the index of the DMRS port starting from 0 are taken as an example for description.
  • the resource block RB involved in this application may refer to 12 consecutive subcarriers in the frequency domain.
  • the resource element RE refers to one subcarrier in the frequency domain and one symbol in the time domain.
  • the RE used to carry the reference signal is recorded as the reference signal RE.
  • the reference signal RE does not necessarily carry the reference signal on each port.
  • the RE it occupies can be determined based on the reference signal pattern.
  • the RE used to carry data is recorded as data RE.
  • the data RE and the reference signal RE can be frequency division multiplexing (FDM) or time division multiplexing (TDM). )of.
  • the density of time-frequency resources occupied by reference signals mentioned in the embodiments of this application may refer to the time-frequency resources (for example, RE) carrying the reference signals in a time-frequency resource group (for example, resource unit group (resource element group)). group, density in REG)).
  • the "density” may refer to the proportion of time-frequency resources used to carry reference signals in a time-frequency resource group to the time-frequency resources in a time-frequency resource group.
  • B represents the number of REs carrying reference signals in a REG (the number of REs occupied by reference signals)
  • P represents the number of all REs included in the REG, or P represents the REs carrying data corresponding to the reference signals.
  • the number (the number of REs occupied by the data corresponding to the reference signal).
  • B can also represent the number of subcarriers carrying the reference signal (the number of subcarriers occupied by the reference signal) on the symbol corresponding to the reference signal in one RB
  • P represents the number of all subcarriers included in the RB.
  • P represents the number of subcarriers carrying data corresponding to the reference signal (the number of subcarriers occupied by data corresponding to the reference signal).
  • the comb degree of the time-frequency resources occupied by the reference signal mentioned in the embodiment of the present application may be related to the density of the time-frequency resources occupied by the reference signal.
  • the density of the time-frequency resources occupied by the reference signal of the P0 port is 1/2, then the comb degree of the time-frequency resources occupied by the reference signal of the P0 port is 2, and the P0 port can It is called a port with a comb degree of 2 (can be recorded as Comb-2); the density of time-frequency resources occupied by the reference signal of the P8 port is 1/4, then the reference signal of the P8 port occupies a comb of time-frequency resources
  • the degree is 4, and the P8 port can be called a port with a comb degree of 4 (can be recorded as Comb-4).
  • the situation of lending the transmission power of an idle port to an active port mentioned in the embodiment of this application is described in units of time-frequency resources. Specifically, it is described in units of RE.
  • An idle port can be understood as the RE occupied by the port that carries no signals
  • an active port can be understood as the RE occupied by the port carries signals (for example, including reference signals, data signals, etc.).
  • Lending the transmit power of an idle port to an active port can be understood as compensating (or misappropriating) the transmit power pre-configured for a certain RE (for example, recorded as RE#0) that does not carry signals on a certain port.
  • the other port carries an RE (for example, RE#1) of the reference signal, thereby achieving the effect of increasing the transmission power of the reference signal on RE#1.
  • RE#1 for example, RE#1
  • the network device in the following method may correspond to, for example, the network device 101 in FIG. 1, and the terminal device may be a device that communicates with the network device. Any one of the multiple terminal devices connected to the communication, such as any one of the terminal devices 102 to 107 in Figure 1.
  • the reference signal is DMRS as an example to describe the technical solution of the embodiment of the present application, which shall not constitute any limitation to the present application.
  • the reference signal in this application can be any reference signal that can be used for channel estimation, such as a cell-specific reference signal (CRS), or other reference signals that can be used to implement the same or similar functions.
  • CRS cell-specific reference signal
  • the name of the reference signal may change, but as long as it is essentially the same as DMRS, the technical solution of this application should be applicable.
  • FIG. 3 is a schematic flowchart of a method 300 for transmitting and receiving reference signals provided by an embodiment of the present application.
  • the method 300 may include the following steps.
  • the network device determines the power ratio ⁇ .
  • the power ratio ⁇ is the power ratio corresponding to the currently scheduled reference signal port.
  • the network device may determine the reference signal of the currently scheduled reference signal port according to the power ratio ⁇ .
  • the power ratio ⁇ is associated with the configuration type of the reference signal, the number of the first code division multiplexing CDM group and the first parameter. In other words, when the configuration type of the reference signal is determined, the power ratio ⁇ has a first corresponding relationship with the number of the first CDM group and the first parameter.
  • the currently scheduled reference signal port belongs to the first port set.
  • the first port set includes M reference signal ports, and the M reference signal ports may be the maximum number of reference signal ports that the system can support.
  • the M reference signal ports correspond to N CDM groups, and each of the N CDM groups corresponds to at least one reference signal port.
  • the at least one reference signal port multiplexes the same time-frequency resource, such as RE, in a code division manner.
  • the time-frequency resources occupied by at least one reference signal port corresponding to different CDM groups do not overlap. In other words, the same time-frequency resources are multiplexed between N CDM groups through frequency division.
  • M and N are integers greater than or equal to 2. .
  • the port set is introduced in this application only to facilitate the description of the relationship between reference signal ports occupying different time-frequency resources.
  • the above description of the first port set can also be understood as a description of the reference signal configuration type or reference signal pattern.
  • the first port set corresponds to a reference signal configuration type or reference signal pattern.
  • N and/or M corresponding to different reference signal configuration types are different.
  • the values of N and M may include the following situations.
  • Case 1 The value of N can be 3 or 4, and the value of M can be 6 or 8 respectively, or the value of M can be 12 or 16 respectively;
  • N can also be 4, 5 or 6, which corresponds to the value of M to 8, 10 or 12 respectively, or the value to which M corresponds to is 16, 20 or 24 respectively.
  • the first situation can correspond to the situation of extending the reference signal port supported by the existing reference signal configuration type 1 (refer to (a) and (b) of Figure 2);
  • the second situation can correspond to the situation of expanding the existing reference signal configuration type 2 (Refer to (c) and (d) of Figure 2) The case of supported reference signal port expansion.
  • reference signal patterns corresponding to the reference signal configuration types involved in this application can be referred to any of the drawings in Figures 4 to 7 and related descriptions.
  • the currently scheduled reference signal port may include at least one port among the reference signal ports supported by the first reference signal configuration type.
  • the first reference signal configuration type includes N 1 CDM groups, where N 1 is an integer greater than or equal to 2.
  • the at least one port may include a first port, the first port corresponds to one CDM group among the N 1 CDM groups, and the density of the time-frequency resources occupied by the reference signal of the first port is 1/4 or 1/6.
  • the at least one port may also include a second port, the second port corresponds to one CDM group among the N 1 CDM groups, and the CDM group corresponding to the second port is different from the CDM group corresponding to the first port.
  • the time-frequency resources occupied by the second port do not overlap with the time-frequency resources occupied by the first port (the time-frequency resources occupied by the second port are frequency division multiplexed with the time-frequency resources occupied by the first port).
  • the density of time-frequency resources occupied by the reference signal of the second port is different from the density of time-frequency resources occupied by the reference signal of the first port.
  • the density of the time-frequency resources occupied by the second port may include four situations.
  • N1 may be 3, the density of the time-frequency resources occupied by the reference signal of the first port is 1/4, and the density of the time-frequency resources occupied by the reference signal of the second port is 1/2.
  • N 1 can be 4, the density of time-frequency resources occupied by the reference signal of the first port is 1/4, and the density of time-frequency resources occupied by the reference signal of the second port is 0, or in other words , the second port is not included in the first reference signal configuration type, or in other words, the reference signal ports of the reference signal ports supported by the first reference signal configuration type all occupy the same density of time-frequency resources.
  • N can also be 5 or 6.
  • the density of the time-frequency resources occupied by the reference signal of the first port is 1/6
  • the density of the time-frequency resources occupied by the reference signal of the second port is 1 respectively. /3 or 0.
  • the reference signal configuration type of the currently scheduled reference signal port is the first reference signal configuration type
  • the above-mentioned first CDM group can be the reference signal The CDM group that does not send data among the N CDM groups of the configuration type.
  • the CDM group corresponding to the currently scheduled reference signal port is a CDM group that does not transmit data.
  • the first parameter is associated with the time-frequency resource occupied by the reference signal.
  • the first parameter may include at least one of the following:
  • the index of the antenna port associated with the reference signal is, for example, the index of the subcarrier occupied by the reference signal.
  • the network device determines the configuration type of the currently scheduled reference signal.
  • the number of the first CDM group and the first parameter can determine the power ratio ⁇ .
  • the network device may determine the configuration type of the currently scheduled reference signal based on the number of currently transmitted data streams.
  • the specific process of the network device determining the reference signal configuration type may refer to existing relevant descriptions.
  • the network device can determine the number of CDM groups that do not send data among the N CDM groups based on the currently scheduled reference signal ports.
  • the currently scheduled reference signal port corresponds to a reference signal configuration type, and the N CDM groups are the reference signals.
  • CDM group corresponding to the reference signal port supported by the configuration type. There is a second corresponding relationship between the currently scheduled reference signal port and the number of CDM groups that do not send data.
  • the second correspondence relationship may be pre-configured in the network device.
  • the second correspondence relationship may be as shown in Table 16 to Table 21.
  • the network device may directly or indirectly determine the first parameter.
  • the network device may directly determine the index of the antenna port associated with the currently scheduled reference signal port.
  • the network device may determine the index of the time-frequency resource of the reference signal port by determining the index of the antenna port of the currently scheduled reference signal port, referring to the foregoing formula (6).
  • the network device may determine the density of the reference signal time-frequency resource by determining the index of the reference signal time-frequency resource.
  • the power ratio of the reference signal port can be indicated more flexibly (for example, different densities of occupied time-frequency resources can be indicated) The power ratio of the reference signal port), thereby increasing the transmission power of the reference signal.
  • the power ratio value may also be associated with the value of N, that is, the power ratio value is associated with the total number of CDM groups in the first port set, or in other words, is associated with the total number of CDM groups included in the current reference signal configuration type.
  • a reference signal port when the reference signal port is expanded, a reference signal port may correspond to an existing reference signal configuration type or a new reference signal configuration type.
  • the newly added reference signal configuration type can be understood as the reference signal configuration type including the new reference signal port.
  • the power that can be improved corresponding to the same first parameter and the first number of CDM groups may be different, that is, the power ratio may be different.
  • the power ratio can be associated with the value of N.
  • the network device sends a reference signal to the terminal device based on the power ratio ⁇ .
  • the terminal device receives the reference signal from the network device.
  • the network device may determine the power scaling factor based on the power ratio ⁇ And determine the reference signal based on the power scaling factor.
  • the power ratio ⁇ and the power scaling factor satisfy the following relationship:
  • the network device can map the reference signal to the corresponding time-frequency resource according to the time-frequency resource mapping rules, and use the time-frequency resource to The terminal device sends this reference signal.
  • the time-frequency resource mapping rule may refer to the above formula (6) and formula (7).
  • the time-frequency resource mapping rules can refer to Equation (8) to Equation (11).
  • the network device sends instruction information to the terminal device.
  • the terminal device receives the indication information from the network device.
  • the indication information is used to indicate the configuration type of the reference signal and the index of the antenna port associated with the reference signal.
  • step S330 may include the network device sending first indication information to the terminal device, where the first indication information indicates the configuration type of the reference signal.
  • the first indication information may be carried in a radio resource control RRC message.
  • the configuration type of the reference signal may be an existing reference signal configuration type or a new reference signal configuration type.
  • Step S330 may also include the network device sending second indication information to the terminal device, the second indication information indicating the index of the antenna port associated with the reference signal.
  • the second indication information may be carried in downlink control information DCI.
  • the index of the antenna port associated with the reference signal is the index of the antenna port associated with the currently scheduled reference signal.
  • the terminal device can determine the configuration type of the reference signal and the index of the antenna port associated with the reference signal (an example of the first parameter), so that the first CDM group number can be determined based on the second correspondence. Further, the terminal device may determine the power ratio ⁇ of the currently scheduled reference signal port according to the first CDM group number, the first parameter and the first correspondence.
  • the terminal device can pre-configure the first corresponding relationship and the second corresponding relationship.
  • the terminal device may be based on the index of the antenna port associated with the reference signal.
  • the index of the time-frequency resource occupied by the reference signal or the density of the time-frequency resource occupied by the reference signal is determined, and then the power ratio ⁇ is determined based on the first corresponding relationship.
  • the terminal device determines the reference signal based on the power ratio.
  • the terminal device may determine the power scaling factor based on the power ratio ⁇ and based on this power scaling factor
  • the reference signal for details, reference may be made to the description of the network device determining the reference signal in S320.
  • the reference signal as DMRS as an example, and combining different DMRS configuration types, the following describes in detail the corresponding relationship between the power ratio ⁇ and the first parameter and the number of the first CDM group in S310. It should be understood that in Figures 4 to 7 mentioned below, the numbers on the horizontal axis represent the index of the symbol in a time slot, and the numbers on the vertical axis represent the index of the subcarrier in one RB.
  • the DMRS patterns shown in Figures 4 and 5 may be DMRS patterns extended to ports supported by DMRS configuration type 1.
  • the DMRS pattern shown in Figure 4 may be a DMRS pattern extended to the ports supported by single-symbol DMRS configuration type 1 ((a) of Figure 4).
  • the DMRS pattern shown in Figure 5 may be a DMRS pattern extended to a port supported by dual-symbol DMRS configuration type 1 ((a) of Figure 5).
  • the DMRS patterns shown in FIG6 and FIG7 may be DMRS patterns obtained by expanding the ports supported by DMRS configuration type 2.
  • the DMRS pattern shown in FIG6 may be a DMRS pattern obtained by expanding the ports supported by single-symbol DMRS configuration type 2 (such as (a) in FIG6 ).
  • the DMRS pattern shown in FIG7 may be a DMRS pattern obtained by expanding the ports supported by dual-symbol DMRS configuration type 2 (such as (a) in FIG7 ).
  • Figure 4 (b) and Figure 4 (c) show DMRS patterns corresponding to two new DMRS configuration types (for simplicity, they are marked as DMRS configuration type 1a and DMRS configuration type 1b respectively).
  • CDM group 0 and/or CDM group 1 in single-symbol DMRS configuration type 1 can be sparsely designed to obtain DMRS configuration type 1a and DMRS configuration type 1b.
  • DMRS configuration type 1a is a sparse design of CDM group 1 in single-symbol DMRS configuration type 1.
  • the sparse design of CDM group 1 is as follows: Frequency division multiplexing of part of the subcarriers occupied by CDM group 1 to add two new DMRS ports (for example, ports P10 and P11).
  • the time-frequency resources of the corresponding DMRS ports of CDM group 0 are not changes occur. It can also be said that the time-frequency resources of CDM group 1 are divided into two groups (for example, divided into CDM group 2 and CDM group 3). Among them, CDM group 2 corresponds to the new ports P10 and P11.
  • the time-frequency resources corresponding to the original ports P2 and P3 have changed.
  • the original P2 and P3 can be The P3 port index is updated to P8 and P9.
  • P8 and P9 correspond to CDM group 3, and P8 and P9 can also be called new ports.
  • the DMRS pattern supports up to 6 DMRS ports (P0, P1, P8 to P11).
  • the 6 DMRS ports correspond to 3 CDM groups (CDM group 0, CDM group2, CDM group3).
  • the DMRS configuration type is DMRS configuration type 1a
  • the value of the total number of CDM groups N is 3 and the value of M is 6.
  • the density of the time-frequency resources occupied by the DMRS of the DMRS port corresponding to CDM group 2 or CDM group 3 (including the above-mentioned first port) is 1/4; the DMRS occupation of the DMRS port corresponding to CDM group 0 (including the above-mentioned second port) is The density of time-frequency resources is 1/2.
  • a currently scheduled DMRS port (DMRS port #1) is used as an example to illustrate the first correspondence relationship corresponding to the DMRS configuration type 1a.
  • the DMRS port #1 may be any DMRS port supported by DMRS configuration type 1a.
  • the number of CDM groups that do not transmit data in the DMRS configuration type 1a may be 1, 2 or 3.
  • the power ratio is different.
  • the determination of the power ratio includes two situations.
  • DMRS port #1 is an existing port, or in other words, DMRS port #1 is a port that occupies a time-frequency resource density of 1/2 (Comb-2 port).
  • Comb-2 port For convenience of description, the following takes DMRS port #1 as P0 as an example.
  • the situation where DMRS port #1 is P1 is similar to the situation where DMRS port #1 is P0.
  • the RE corresponding to the CDM group 0 carries the DMRS reference signal
  • the RE corresponding to the CDM group 2 and CDM group 3 carries the DMRS port #1 corresponding data (for example, PDSCH).
  • there is no RE that can "borrow" power that is, the power of each RE carrying DMRS is the same as the power of each RE carrying PUSCH, that is, the power ratio is 0.
  • the RE corresponding to the CDM group 0 carries the DMRS reference signal, and the RE corresponding to one of the CDM group 2 and CDM group 3 does not Carrying signals, the RE corresponding to another CDM group carries the data corresponding to DMRS port #1.
  • the power of REs that do not carry signals can be "borrowed" to REs that carry DMRS. Since the number of REs that can be borrowed (REs corresponding to CDM group 2 or CDM group 3) is 1/2 times the number of REs corresponding to DMRS port #1, the power of REs carrying DMRS can be increased to 1.5 times the original. That is, the power of each RE carrying DMRS is 1.5 times the power of each RE carrying PUSCH. That is, the power ratio is -10*log10(1.5), which is -1.76dB.
  • the RE corresponding to CDM group 0 carries DMRS reference signals, and the REs corresponding to CDM group 2 and CDM group 3 do not carry signals.
  • the number of REs that can be borrowed (REs corresponding to CDM group 2 and CDM group 3) is 1 times the number of REs corresponding to DMRS port #1. Therefore, the power of REs carrying DMRS can be increased to 2 times. That is, the power of each RE carrying DMRS is twice the power of each RE carrying PUSCH, and the power ratio is -10*log10(2), which is -3dB.
  • DMRS port #1 is P8, P9, P10 or P11
  • DMRS port #1 is a newly added port, or in other words, DMRS port #1 is a port that occupies a time-frequency resource density of 1/4 (Comb-4 port).
  • DMRS port #1 is a port that occupies a time-frequency resource density of 1/4 (Comb-4 port).
  • Comb-4 port a time-frequency resource density of 1/4
  • the following takes DMRS port #1 as P8 as an example.
  • the situation where DMRS port #1 is P9, P10 or P11 is similar to DMRS port #1 being P8.
  • the RE corresponding to the CDM group 3 carries the DMRS reference signal
  • the RE corresponding to the CDM group 0 and CDM group 2 carries the DMRS port #1 corresponding data (e.g., PDSCH).
  • the power ratio is 0.
  • the RE corresponding to the CDM group 3 carries the DMRS reference signal, and the RE corresponding to a CDM group in the CDM group 0 and CDM group 2 does not Carrying signals, the RE corresponding to another CDM group carries the data corresponding to DMRS port #1.
  • the power of REs that do not carry signals can be "borrowed" to REs that carry DMRS.
  • the number of REs that can be borrowed (REs corresponding to CDM group 0 or CDM group 2) is at least twice the number of REs corresponding to DMRS port #1.
  • the power of REs carrying DMRS can be increased to at least 2 times of the original, that is, the power of REs carrying DMRS can be increased to at least 2 times.
  • the power of each RE of DMRS is at least 2 times the power of each RE carrying PUSCH. That is, the power ratio is -10*log10(2), which is -3dB.
  • the power of each RE carrying DMRS is 3 times the power of each RE carrying PUSCH, that is, the power ratio is -10*log10(3), which is -4.77dB.
  • the total number of the CDM group may be 4.
  • the power of the RE carrying DMRS can be increased to N 2 times of the original, that is, the power ratio is -10*log10(N 2 ).
  • DMRS configuration type 1b is a sparse design of CDM group 0 and CDM group 1 in single-symbol DMRS configuration type 1. Specifically, part of the subcarriers occupied by CDM group 1 in DMRS configuration type 1 is frequency division multiplexed with the new two DMRS ports (such as P10 and P11), and part of the subcarriers occupied by CDM group 0 is frequency division multiplexed with the new Two additional DMRS ports (such as P14 and P15). It can also be said that the time-frequency resources of CDM group 0 and CDM group 1 are divided into two groups.
  • the time-frequency resources of CDM group 0 are divided into two groups (for example, divided into CDM group 4 and CDM group 5); the time-frequency resources of CDM group 1 are divided into two groups (for example, divided into CDM group 2 and CDM group 3 ).
  • CDM group 4 corresponds to the new ports P12 and P13
  • CDM group 3 corresponds to the new ports P8 and P9
  • CDM group 5 corresponds to the new ports P14 and P15
  • CDM group 2 correspond to the new ports P10 and P11.
  • the DMRS pattern supports up to 8 DMRS ports (P8 to P15), and 8 DMRS ports correspond to 4 CDM groups. That is, the value of N, the total number of CDM groups mentioned above, is 4, and the value of M is 8.
  • the following takes the currently scheduled DMRS port (DMRS port #1) as any one of the DMRS ports supported by the DMRS configuration type 1b as an example to illustrate the first correspondence relationship corresponding to the DMRS configuration type 1b.
  • the power of the RE carrying DMRS can be increased to N 2 times. , that is, the power ratio is -10*log10(N 2 ).
  • the number of CDM groups that do not transmit data in the DMRS configuration type 1b may be 1, 2, 3 or 4. That is, the value of N 2 can be 1, 2, 3 or 4.
  • N 1 is 2, 3 or 4
  • the corresponding power ratios are -10*log10(2), -10*log10(3) or -10*log10(4) respectively, which is -3dB, -4.77dB or -6dB.
  • Figure 5(b) and Figure 5(c) show DMRS patterns corresponding to two new DMRS configuration types (denoted as DMRS configuration type 1c and DMRS configuration type 1d respectively).
  • the DMRS configuration type 1c and DMRS configuration type 1d may be DMRS configuration types extended to the ports supported by dual-symbol DMRS configuration type 1.
  • CDM group 0 and/or CDM group 1 in dual-symbol DMRS configuration type 1 can be sparsely designed to obtain DMRS configuration type 1c and DMRS configuration type 1d.
  • DMRS configuration type 1c is a sparse design of CDM group 1 in dual-symbol DMRS configuration type 1.
  • DMRS configuration type 1d is a sparse design of CDM group0 and CDM group 1 in dual-symbol DMRS configuration type 1.
  • the sparse design of CDM group 0 and/or CDM group 1 is similar to the sparse design of CDM group 0 and/or CDM group 1 in Figure 4, and will not be described again.
  • the DMRS pattern supports up to 12 DMRS ports (P0, P1, P4, P5, P8-P15).
  • 12 DMRS ports correspond to 3 CDM groups (CDM group 0, CDM group 3 and CDM group 2). That is, the value of N, the total number of CDM groups mentioned above, is 3, and the value of M is 12.
  • the DMRS pattern supports up to 16 DMRS ports (P8 to P23).
  • 16 DMRS ports correspond to 4 CDM groups (CDM group 2 to CDM group 5). That is, the value of N, the total number of CDM groups mentioned above, is 4, and the value of M is 16.
  • the number of CDM groups that do not send data can be 1, 2, 3 or 4.
  • the first corresponding relationship is similar to the case where the DMRS configuration type is DMRS configuration type 1a or 1b, and will not be described again.
  • the first correspondence relationship may be as shown in Table 8.
  • the index of the new port in order to distinguish existing ports from new ports, can be set to be greater than or equal to "x".
  • x can be the maximum index of the existing port plus n.
  • the value of n may be 1.
  • the existing port is a port supported by DMRS configuration type 1
  • the value of x can be 8. Therefore, existing ports (ports supported by existing DMRS configuration type 1) and new ports can be distinguished through the relationship between the DMRS port index and "8". That is, the "antenna port” column may be indicated as a size relationship with "8".
  • the value of n can also be greater than 1, which is not limited in this application.
  • the “antenna port” may also indicate an index of a specific antenna port, for example, the “antenna port” column may be indicated as “8, 9, 10 . . . ”.
  • the "antenna port” may also indicate the index of the time-frequency resource occupied by the DMRS (for example, the index of the subcarrier) or the density of the time-frequency resource occupied by the DMRS (for example, 1/2, 1/4 or 1/6 ).
  • the network device or the terminal device can determine the information of the time-frequency resources occupied by the DMRS port through the index of the DMRS port, For example, the index of time-frequency resources and the density of time-frequency resources.
  • DMRS port P0 or P1 it may belong to the existing DMRS configuration type 1, or may belong to DMRS configuration type 1a or DMRS configuration type 1c.
  • the power ratio can be associated with the total number of CDM groups in the DMRS configuration type.
  • the first correspondence relationship between DMRS configuration type 1a to DMRS configuration type 1d can be as shown in Table 9 below.
  • DMRS ports while adding DMRS ports, it can also be compatible with existing terminal equipment (Rel.15 terminals, or terminal equipment that supports existing ports), that is, the terminal equipment provided by this application and only Supports multi-user pairing of terminal equipment with existing standard capabilities.
  • existing terminal equipment Rel.15 terminals, or terminal equipment that supports existing ports
  • Existing terminal equipment does not require any hardware and software updates.
  • Compatibility with existing terminal equipment means that when performing multi-user pairing, existing terminal equipment and new terminal equipment (Rel.18 terminals, or terminal equipment that supports new ports) can be scheduled together on the same time-frequency resources. transmission.
  • DMRS configuration type 1a to DMRS configuration type 1d when the scheduled DMRS port is a port supported by DMRS configuration type 1, DMRS configuration type 1a to DMRS configuration type 1d, it is assumed that DMRS configuration type 1, DMRS configuration type 1a to DMRS configuration type 1d correspond to other ports supported All time and frequency resources are used to carry DMRS, or in other words, it is assumed that all other ports are occupied.
  • the first correspondence relationship is as shown in Table 10.
  • the scheduled DMRS ports are ports supported by DMRS configuration type 1.
  • the REs corresponding to CDM group 0 and CDM group 1 in DMRS configuration type 1 carry DMRS reference signals.
  • the scheduled DMRS port can be the port corresponding to CDM group 0 or CDM group 1. Therefore, the power of the RE carrying DMRS can be increased to twice the original value, that is, the power ratio is -10*log10(2), which is -3dB.
  • the scheduled DMRS port is a port supported by DMRS configuration type 1a or 1c, and the scheduled DMRS port can be an existing port or a newly added port.
  • the REs corresponding to CDM group 0, CDM group 2, and CDM group 3 in the DMRS configuration type carry DMRS reference signals.
  • the scheduled port is an existing port, the power of the RE carrying DMRS can be increased to twice the original, that is, the power ratio is -10*log10(2), that is, -3dB; when the scheduled port is a newly added port, the power of the RE carrying DMRS can be increased to four times the original, that is, the power ratio is -10*log10(4), that is, -6dB.
  • the scheduled DMRS ports are ports supported by DMRS configuration type 1b or 1d, and the scheduled DMRS ports are all new ports.
  • CDM group 2 to CDM The RE corresponding to group 5 carries the DMRS reference signal.
  • the power of the RE carrying DMRS can be increased to 4 times the original, that is, the power ratio is -10*log10(4), which is -6dB.
  • multiple currently scheduled DMRS ports are used as an example to illustrate the first correspondence relationship between DMRS configuration types 1a to 1d.
  • the power of DMRS on each RE can be expressed as:
  • n 1 represents the number of DMRS ports (existing ports) that occupy 1/2 of the time-frequency resources in the DMRS configuration type
  • n 2 represents the DMRS ports that occupy 1/4 of the time-frequency resources in the DMRS configuration type. The number of (new ports).
  • REs with subcarrier indexes 0, 1, 2, 4, 5, 6, 8, 9, and 10 can be used to carry DMRS, that is, subcarriers used to carry DMRS.
  • the total power of the carrier is 9E. 2/3 of the 9E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/2, and 1/3 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/4. Therefore, DMRS is used in each
  • the power P DMRS on each RE can be expressed as the above formula.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the corresponding power ratio ⁇ can be expressed as the following formula:
  • the network device can determine each scheduled DMRS port according to the currently scheduled number of DMRS ports that occupy time-frequency resources with a density of 1/2 and/or a density of 1/4, that is, the values of n 1 and n 2 power ratio.
  • the power of DMRS on each RE can be expressed as:
  • n1 represents the number of DMRS ports (existing ports) in the DMRS configuration type that occupy a density of 1/2 of the time-frequency resources
  • n2 represents the number of DMRS ports (new ports) in the DMRS configuration type that occupy a density of 1/4 of the time-frequency resources.
  • REs with subcarrier indexes from 0 to 11 can be used to carry DMRS, that is, the total power of the subcarriers used to carry DMRS is 12E.
  • 1/2 of the 12E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/2, and 1/2 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/4. Therefore, DMRS is used in each
  • the power P DMRS on each RE can be expressed as the above formula.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the corresponding power ratio ⁇ can be expressed as follows:
  • the network device can determine the power ratio of each scheduled DMRS port to be -3dB based on the above formula.
  • the power of DMRS on each RE can be expressed as:
  • n 2 represents the number of DMRS ports (new ports) that occupy a time-frequency resource density of 1/4 in the DMRS configuration type.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the corresponding power ratio ⁇ can be expressed as the following formula:
  • the network device can determine the power ratio of each scheduled DMRS port based on the number k of CDM groups that do not send data in the current DMRS configuration type.
  • the first correspondence relationship may be as shown in Table 11.
  • the DMRS corresponding to the three new DMRS configuration types are recorded as DMRS configuration type 2a, DMRS configuration type 2b and DMRS configuration type 2c respectively) pattern.
  • one CDM group from CDM group 0 to CDM group 2 in single-symbol DMRS configuration type 2 can be sparsely designed to obtain the DMRS configuration type 2a; CDM group 0 to CDM group 2 in single-symbol DMRS configuration type 2 can be sparsely designed. Any two CDM groups in CDM group 2 are sparsely designed to obtain the DMRS configuration type 2b; CDM group 0 to CDM group 2 in the single-symbol DMRS configuration type 2 are sparsely designed to obtain the DMRS configuration type 2c.
  • the sparse design of CDM group can be referred to the description in Figure 4.
  • the DMRS pattern supports up to 8 DMRS ports (P0 to P3, P12 to P15), and 8 DMRS ports correspond to 4 CDM groups (CDM group 0, CDM group 1, CDM group 3, CDM group 4). That is, the value of N, the total number of CDM groups mentioned above, is 4, and the value of M is 8. And the density of time-frequency resources occupied by DMRS of the DMRS port corresponding to CDM group0 or CDM group 1 is 1/3, and the density of time-frequency resources occupied by DMRS of the DMRS port corresponding to CDM group 3 or CDM group4 is 1/6.
  • a currently scheduled DMRS port (DMRS port #1) is used as an example to illustrate the first correspondence relationship corresponding to DMRS configuration type 2a.
  • the DMRS port #1 may be any DMRS port supported by DMRS configuration type 2a.
  • the number of CDM groups that do not transmit data in the DMRS configuration type A may be 1, 2, 3 or 4.
  • the power ratio is different.
  • DMRS port #1 is P0, P1, P2 or P3
  • DMRS port #1 is an existing port, or in other words, DMRS port #1 is a port that occupies 1/3 of the time-frequency resource density.
  • DMRS port #1 is P0 as an example.
  • DMRS port #1 is P1, P2 or P3, which is similar to DMRS port #1 being P0.
  • the RE corresponding to the CDM group 0 carries the DMRS reference signal
  • the RE corresponding to the CDM group 1 CDM group 3 and CDM group 4 carry the DMRS port# 1 corresponding data (for example, PDSCH).
  • the power ratio is 0.
  • the RE corresponding to CDM group 0 carries DMRS reference signals
  • the RE corresponding to CDM group 1 does not carry signals
  • the RE corresponding to CDM group 3 and CDM group 4 RE carries data corresponding to DMRS port #1.
  • the power of the RE carrying DMRS can be increased to twice the original, that is, the power ratio is -10*log10(2), which is -3dB.
  • the RE corresponding to CDM group 0 carries DMRS reference signals, and the REs corresponding to CDM group 1 and CDM group 3 do not need to carry signals.
  • CDM group The RE corresponding to 4 carries the data corresponding to DMRS port #1. At this time, the power of the RE carrying DMRS can be increased to 2.5 times the original, that is, the power ratio is -10*log10(2.5), which is -3.98dB.
  • the RE corresponding to CDM group 0 carries the DMRS reference signal, and the REs corresponding to CDM group 1, CDM group 3 and CDM group 4 do not need to carry the DMRS reference signal. Signal.
  • the power of the RE carrying DMRS can be increased to 3 times the original, that is, the power ratio is -10*log10(3), which is -4.77dB.
  • DMRS port #1 is P12, P13, P14 or P15
  • DMRS port #1 is a newly added port, or in other words, DMRS port #1 is a port that occupies a time-frequency resource density of 1/6.
  • DMRS port #1 is a port that occupies a time-frequency resource density of 1/6.
  • P12 For convenience of description, the following takes DMRS port #1 as P12 as an example.
  • the situation where DMRS port #1 is P13, P14 or P15 is similar to DMRS port #1 being P12.
  • the power ratio is 0.
  • the RE corresponding to the CDM group 3 carries the DMRS reference signal, and at least one RE among the REs corresponding to the CDM group 0, CDM group 1 and CDM group 4 It does not need to carry signals.
  • the number of REs that can be borrowed is 1 times the number of REs corresponding to DMRS port 2, that is, the power ratio is -10*log10(2), which is -3dB.
  • the RE corresponding to the CDM group 3 carries the DMRS reference signal, and at least two of the REs corresponding to the CDM group 0, CDM group 1 and CDM group 4 RE does not need to carry signals.
  • the number of REs that can be borrowed is twice the number of REs corresponding to DMRS port #1, that is, the power ratio is -10*log10(3), which is -4.77dB.
  • the RE corresponding to the CDM group 3 carries the DMRS reference signal, and at least 3 of the REs corresponding to the CDM group 0, CDM group 1 and CDM group 4 RE does not need to carry signals.
  • the number of REs that can be borrowed is 4 times the number of REs corresponding to DMRS port #1, that is, the power ratio is -10*log10(4), which is -6dB.
  • DMRS port #1 when DMRS port #1 is a new port, the number of CDM groups that do not send data in DMRS configuration type 2a is N 2 , and the corresponding power ratio is -10*log10(N 2 ), N 2 >1 .
  • the total number of the CDM group can be 6.
  • the power of the RE carrying DMRS can be increased to the original N 2 times, that is, the power ratio is -10*log10(N 2 ), N 2 >1.
  • the DMRS pattern supports up to 10 DMRS ports (P0, P1, P12 to P19).
  • 10 DMRS ports correspond to 5 CDM groups (CDM group 0, CDM group 3 to CDM group 6). That is, the value of N, the total number of CDM groups mentioned above, is 5, and the value of M is 10.
  • the density of the time-frequency resources occupied by the DMRS of the DMRS port corresponding to CDM group 0 is 1/3
  • the density of the time-frequency resources occupied by the DMRS of the DMRS port corresponding to any one of CDM group 3 to CDM group 6 is 1/6 .
  • the following takes the currently scheduled DMRS port (DMRS port #1) as any one of the DMRS ports supported by DMRS configuration type 2b as an example to illustrate the first correspondence relationship corresponding to DMRS configuration type 2b.
  • the number of CDM groups that do not transmit data in the DMRS configuration type 2b may be any one from 1 to 5.
  • DMRS port #1 is P0 or P1.
  • the following description takes DMRS port #1 as P0 as an example.
  • the power ratio is 0.
  • the RE corresponding to the CDM group 0 carries the DMRS reference signal, and the RE corresponding to any CDM group among the CDM group 3 to CDM group 6 No signal is carried, and the RE corresponding to the other CDM groups carries the data corresponding to DMRS port #1.
  • the power of each RE carrying DMRS is 1.5 times the power of each RE carrying PUSCH. That is, the power ratio is -10*log10(1.5), which is -1.76dB.
  • the power of each RE carrying DMRS is twice the power of each RE carrying PUSCH. That is, the power ratio is -10*log10(2), which is -3dB.
  • the power of each RE carrying DMRS is 2.5 times the power of each RE carrying PUSCH, that is, the power ratio is -10*log10(2.5 ), which is -3.98dB.
  • the power of each RE carrying DMRS is 3 times the power of each RE carrying PUSCH, that is, the power ratio is -10*log10(3 ), which is -4.77dB.
  • DMRS port #1 is any one from P12 to P19
  • the power ratio value is 0.
  • the power ratio is -10*log10(N 2 ).
  • N 1 being 2, 3, 4 or 5
  • the power ratios are -3dB, -4.77dB, -6dB or -6.99dB respectively.
  • the DMRS pattern supports up to 12 DMRS ports (P12 to P23), and the 12 DMRS ports correspond to 6 CDM groups (CDM group 3 to CDM group8). That is, the value of N, the total number of CDM groups mentioned above, is 6, and the value of M is 12.
  • the power of the RE carrying DMRS can be increased to N 2 times. , that is, the power ratio is -10*log10(N 2 ).
  • the value of N 2 can be any one from 1 to 6.
  • the power ratio is -3dB, -4.77dB, -6dB, -6.99dB or -7.78dB respectively.
  • the DMRS patterns corresponding to the three new DMRS configuration types are respectively recorded as DMRS configuration type 2d, DMRS configuration type 2e and DMRS configuration type 2f.
  • one CDM group from CDM group 0 to CDM group 2 in the dual-symbol DMRS configuration type 2 can be sparsely designed to obtain the DMRS configuration type 2d; CDM group 0 to CDM group 2 in the dual-symbol DMRS configuration type 2 can be obtained. Any two CDM groups in CDM group 2 are sparsely designed to obtain the DMRS configuration type 2e; CDM group 0 to CDM group 2 in the dual-symbol DMRS configuration type 2 are sparsely designed to obtain the DMRS configuration type 2f. Among them, the sparse design of CDM group can be referred to the description in Figure 4.
  • the DMRS pattern supports up to 16 DMRS ports (P0-P3, P6-P8 and P12-P19).
  • 16 DMRS ports correspond to 4 CDM groups (CDM group0, CDM group 1, CDM group 3 and CDM group 4). That is, the value of N above is 4, and the value of M is 16.
  • CDM groups CDM group0, CDM group 1, CDM group 3 and CDM group 4
  • N the value of N above is 4
  • M is 16.
  • DMRS configuration type 2a For the density of time-frequency resources occupied by DMRS of the DMRS port corresponding to the CDM group, please refer to DMRS configuration type 2a.
  • the DMRS pattern supports up to 20 DMRS ports.
  • 20 DMRS ports correspond to 5 CDM groups. That is, the value of N, the total number of CDM groups mentioned above, is 5, and the value of M is 20.
  • the DMRS pattern supports up to 24 DMRS ports.
  • 24 DMRS ports correspond to 6 CDM groups. That is, the value of N, the total number of CDM groups mentioned above, is 6, and the value of M is 24.
  • the number of CDM groups that do not transmit data may be any one from 1 to 6.
  • the first corresponding relationship is similar to the case where the DMRS configuration type is DMRS configuration type 2a to 2c, and will not be described again.
  • the scheduled DMRS port belongs to DMRS configuration type 2 or any one of DMRS configuration types 2a to 2f
  • the first corresponding relationship is as shown in Table 12.
  • the scheduled DMRS port is a port supported by DMRS configuration type 2, DMRS configuration type 2a to DMRS configuration type 2f, it is assumed that DMRS configuration type 2, DMRS configuration type 2a to DMRS configuration type 2f are supported by other ports corresponding to All time and frequency resources are used to carry DMRS, or in other words, it is assumed that all other ports are occupied.
  • the first correspondence relationship is as shown in Table 13.
  • the index of the new port in order to distinguish existing ports from new ports, can be set to be greater than or equal to "x".
  • x can be the maximum index of the existing port plus n.
  • the value of n may be 1.
  • the existing port when the existing port is a port supported by DMRS configuration type 2, the value of x may be 12. Therefore, existing ports (ports supported by existing DMRS configuration type 2) and new ports can be distinguished through the relationship between the index of the DMRS port and "12". That is, the "antenna port” column may be indicated as a size relationship to "12".
  • the value of n can also be greater than 1, which is not limited in this application.
  • antenna port may also indicate the index of a specific antenna port.
  • the “antenna port” column is indicated as “12, 13,".
  • the "antenna port” may also indicate the index of the time-frequency resource occupied by the DMRS (for example, the index of the subcarrier) or the density of the time-frequency resource occupied by the DMRS (for example, 1/2, 1/4 or 1/6 ).
  • the scheduled DMRS port is the port supported by DMRS configuration type 2, and the REs corresponding to CDM group 0 and CDM group 1 in DMRS configuration type 2 carry DMRS reference signals.
  • the scheduled DMRS port can be the port corresponding to CDM group 0 or CDM group 1. Therefore, the power of the RE carrying DMRS can be increased to twice the original, that is, the power ratio is -10*log10(2), which is -3dB.
  • the scheduled DMRS ports are ports supported by DMRS configuration type 2.
  • the REs corresponding to CDM group 0 to CDM group 2 in DMRS configuration type 2 carry DMRS reference signals.
  • the scheduled DMRS port can be the port corresponding to CDM group 0, CDM group 1 or CDM group 2. Therefore, the power of the RE carrying DMRS can be increased to 3 times the original, that is, the power ratio is -10*log10(3), which is -4.77dB.
  • the scheduled DMRS port is a port supported by DMRS configuration type 2a or 2d, and the scheduled DMRS port can be an existing port or a new port.
  • CDM REs corresponding to group 0, CDMgroup 1, CDMgroup 3 and CDM group 4 carry DMRS reference signals.
  • the power of the RE carrying DMRS can be increased to 3 times the original, that is, the power ratio is -10*log10(3), which is -4.77dB; when the scheduled port When the port is a new port, the power of the RE carrying DMRS can be increased to 6 times the original, that is, the power ratio is -10*log10(6), which is -7.78dB.
  • the scheduled DMRS port is a port supported by DMRS configuration type 2b or 2e, and the scheduled DMRS port can be an existing port or a new port.
  • CDM group 0, CDMgroup REs corresponding to CDM group 3 to 6 carry DMRS reference signals.
  • the scheduled port is an existing port, the power of the RE carrying DMRS can be increased to 3 times the original, that is, the power ratio is -10*log10(3), which is -4.77dB; when the scheduled port When the port is a new port, the power of the RE carrying DMRS can be increased to 6 times the original, that is, the power ratio is -10*log10(6), which is -7.78dB.
  • the scheduled DMRS ports are ports supported by DMRS configuration type 2c or 2f, and the scheduled DMRS ports are all new ports.
  • CDM group 3 to CDM The RE corresponding to group 8 carries the DMRS reference signal.
  • the power of the RE carrying DMRS can be increased to 6 times the original, which is -7.78dB.
  • multiple currently scheduled DMRS ports are used as an example to illustrate the first correspondence relationship between DMRS configuration types 2a to 2f.
  • the power of DMRS on each RE can be expressed as:
  • n 1 represents the number of DMRS ports (existing ports) that occupy 1/3 of the time-frequency resources in the DMRS configuration type.
  • n 2 represents the number of DMRS ports (new ports) occupying a time-frequency resource density of 1/6 in the DMRS configuration type.
  • REs with subcarrier indexes 0, 1, 2, 3, 4, 6, 7, 8, 9, and 10 can be used to carry DMRS, that is, used to carry DMRS
  • the total power of the subcarriers is 10E. 4/5 of the 10E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 1/5 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is used in each
  • the power P DMRS on each RE can be expressed as the above formula.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the corresponding power ratio ⁇ can be expressed as the following formula:
  • the network device can determine each scheduled DMRS port according to the currently scheduled number of DMRS ports that occupy time-frequency resources with a density of 1/3 and/or a density of 1/6, that is, the values of n 1 and n 2 power ratio.
  • the power of DMRS on each RE can be expressed as:
  • n 1 represents the number of DMRS ports (existing ports) that occupy 1/3 of the time-frequency resources in the DMRS configuration type.
  • n 2 represents the number of DMRS ports (new ports) occupying a time-frequency resource density of 1/6 in the DMRS configuration type.
  • the power of data (eg, PDSCH) on each RE can be expressed as:
  • the corresponding power ratio ⁇ can be expressed as follows:
  • the network device can determine the power ratio of each scheduled DMRS port according to the above formula.
  • the power of DMRS on each RE can be expressed as:
  • n 1 represents the number of DMRS ports (existing ports) that occupy 1/3 of the time-frequency resources in the DMRS configuration type.
  • n 2 represents the number of DMRS ports (new ports) that occupy 1/6 of the time-frequency resources in the DMRS configuration type.
  • REs with subcarrier indexes of 0, 1, 2, 6, 7, and 8 can be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 6E. 2/3 of the 9E are used to carry DMRS of DMRS ports occupying a time-frequency resource density of 1/3, and 1/3 are used to carry DMRS of DMRS ports occupying a time-frequency resource density of 1/6. Therefore, the power P DMRS of DMRS on each RE can be expressed as the above formula.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the corresponding power ratio ⁇ can be expressed as the following formula:
  • the network device can determine each scheduled DMRS according to the number of currently scheduled DMRS ports that occupy time-frequency resources with a density of 1/3 and/or a density of 1/6, that is, the values of n 1 and n 2 Port power ratio.
  • the power of DMRS on each RE can be expressed as:
  • n 1 represents the number of DMRS ports (existing ports) that occupy 1/3 of the time-frequency resources in the DMRS configuration type.
  • n 2 represents the number of DMRS ports (new ports) that occupy 1/6 of the time-frequency resources in the DMRS configuration type.
  • REs with subcarrier indexes of 0, 1, 2, 3, 6, 7, 8, and 9 can be used to carry DMRS, that is, the subcarriers used to carry DMRS
  • the total power is 8E. 1/2 of the 12E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 1/2 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is
  • the power P DMRS on each RE can be expressed as the above formula.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the corresponding power ratio ⁇ can be expressed as the following formula:
  • the network device can determine the power ratio of each scheduled DMRS port to be -3dB based on the above formula.
  • the power of DMRS on each RE can be expressed as:
  • n 1 represents the number of DMRS ports (existing ports) that occupy 1/3 of the time-frequency resources in the DMRS configuration type.
  • n 2 represents the number of DMRS ports (new ports) occupying a time-frequency resource density of 1/6 in the DMRS configuration type.
  • REs with subcarrier indexes of 0, 1, 2, 3, 4, 6, 7, 8, 9, and 10 can be used to carry DMRS, that is, used to carry DMRS
  • the total power of the subcarriers is 10E. 2/5 of the 10E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 3/5 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is used in each
  • the power P DMRS on each RE can be expressed as the above formula.
  • the power of data (eg, PDSCH) on each RE can be expressed as:
  • the corresponding power ratio ⁇ can be expressed as the following formula:
  • the network device can determine each scheduled DMRS according to the number of currently scheduled DMRS ports that occupy time-frequency resources with a density of 1/3 and/or a density of 1/6, that is, the values of n 1 and n 2 Port power ratio.
  • the power of DMRS on each RE can be expressed as:
  • n1 represents the number of DMRS ports (existing ports) whose density of occupied time-frequency resources in the DMRS configuration type is 1/3
  • n2 represents the number of DMRS ports (newly added ports) whose density of occupied time-frequency resources in the DMRS configuration type is 1/6.
  • REs with subcarrier indexes from 0 to 11 can be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 12E. 1/3 of the 12E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 2/3 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is used in each The power P DMRS on each RE can be expressed as the above formula.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the corresponding power ratio ⁇ can be expressed as the following formula:
  • the network device can determine the power ratio of each scheduled DMRS port according to the above formula.
  • the power of DMRS on each RE can be expressed as:
  • n 2 represents the number of DMRS ports (new ports) that occupy a time-frequency resource density of 1/6 in the currently scheduled DMRS configuration type 2c or 2f.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the corresponding power ratio ⁇ can be expressed as the following formula:
  • the network device can determine each scheduled DMRS based on the number k of CDM groups that do not send data in the current DMRS configuration type. Port power ratio.
  • the first correspondence relationship may be as shown in Table 14.
  • the network device or terminal device can determine the value of ⁇ according to the DMRS configuration type. For example, when the number of CDM groups that do not send data is 4, n 1 is 1 and n 2 is 2, if the DMRS configuration type is 2a or 2d, the value of ⁇ is -3.52dB; if the DMRS configuration type If the type is 2b or 2e, the value of ⁇ is -0.27dB.
  • Table 14 is only an example of the first correspondence relationship.
  • the first correspondence relationship may also be a sub-table of table 14 , that is, the first correspondence relationship may include some rows of table 14 .
  • the current schedule Multiple DMRS ports are taken as an example to illustrate the first correspondence relationship between DMRS configuration types 2a to 2f.
  • the power of DMRS on each RE can be expressed as:
  • n 1 represents the number of DMRS ports (existing ports) that occupy 1/3 of the time-frequency resources in the DMRS configuration type
  • n 2 represents the DMRS ports that occupy 1/6 of the time-frequency resources in the DMRS configuration type. The number of (new ports).
  • REs with subcarrier indexes 0, 1, 2, 6, 7, and 8 can be used to carry DMRS, that is, the total power of the subcarriers used to carry DMRS is 6E .
  • 2/3 of the 6E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 1/3 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is used in each
  • the power P DMRS on each RE can be expressed as the above formula.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the power ratio ⁇ can be expressed as the following formula:
  • the network device can determine each scheduled DMRS according to the number of currently scheduled DMRS ports that occupy time-frequency resources with a density of 1/3 and/or a density of 1/6, that is, the values of n 1 and n 2 Port power ratio.
  • the power of DMRS on each RE can be expressed as:
  • n 1 represents the number of DMRS ports (existing ports) that occupy 1/3 of the time-frequency resources in the DMRS configuration type
  • n 2 represents the DMRS ports that occupy 1/6 of the time-frequency resources in the DMRS configuration type. The number of (new ports).
  • REs with subcarrier indexes of 0, 1, 2, 3, 6, 7, 8, and 9 can be used to carry DMRS, that is, the subcarriers used to carry DMRS
  • the total power is 8E. 1/2 of the 6E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 1/2 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is used in each
  • the power P DMRS on each RE can be expressed as the above formula.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the power ratio ⁇ can be expressed as the following formula:
  • the network device can determine the power ratio of each scheduled DMRS port according to the above formula.
  • the power of DMRS on each RE can be expressed as:
  • n 1 represents the number of DMRS ports (existing ports) that occupy 1/3 of the time-frequency resources in the DMRS configuration type
  • n 2 represents the DMRS ports that occupy 1/6 of the time-frequency resources in the DMRS configuration type. The number of (new ports).
  • REs with subcarrier indexes of 0, 1, 2, 3, 4, 6, 7, 8, 9, and 10 can be used to carry DMRS, that is, used to carry DMRS
  • the total power of the subcarriers is 10E. 2/5 of the 10E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 3/5 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is used in each
  • the power P DMRS on each RE can be expressed as the above formula.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the power ratio ⁇ when the number of CDM groups that do not send data is 5, the power ratio ⁇ can be expressed as the following formula:
  • the power of DMRS on each RE can be expressed as:
  • n1 represents the number of DMRS ports (existing ports) in the DMRS configuration type whose density of occupied time-frequency resources is 1/3
  • n2 represents the number of DMRS ports (newly added ports) in the DMRS configuration type whose density of occupied time-frequency resources is 1/6.
  • REs with subcarrier indexes 0, 1, 2, 3, 4, 6, 7, 8, 9, and 10 can be used to carry DMRS, that is, used to carry DMRS
  • the total power of the subcarriers is 10E. 4/5 of the 10E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 1/5 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is used in each
  • the power P DMRS on each RE can be expressed as the above formula.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the power ratio ⁇ when the number of CDM groups that do not send data is 5, the power ratio ⁇ can be expressed as the following formula:
  • the network device can determine each scheduled DMRS according to the number of currently scheduled DMRS ports that occupy time-frequency resources with a density of 1/3 and/or a density of 1/6, that is, the values of n 1 and n 2 Port power ratio.
  • the power of DMRS on each RE can be expressed as:
  • n 1 represents the number of DMRS ports (existing ports) that occupy 1/3 of the time-frequency resources in the DMRS configuration type
  • n 2 represents the DMRS ports that occupy 1/6 of the time-frequency resources in the DMRS configuration type. The number of (new ports).
  • REs with subcarrier indexes 0-11 can be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 12E. 1/3 of the 10E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 2/3 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, the power P DMRS of DMRS on each RE can be expressed as the above formula.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the power ratio ⁇ when the number of CDM groups that do not send data is 5, the power ratio ⁇ can be expressed as the following formula:
  • the power of DMRS on each RE can be expressed as:
  • n 1 represents the number of DMRS ports (existing ports) that occupy 1/3 of the time-frequency resources in the DMRS configuration type
  • n 2 represents the DMRS ports that occupy 1/6 of the time-frequency resources in the DMRS configuration type. The number of (new ports).
  • REs with subcarrier indexes of 0-11 can be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 12E. 2/3 of the 12E are used to carry DMRS of DMRS ports occupying a time-frequency resource density of 1/3, and 1/3 are used to carry DMRS of DMRS ports occupying a time-frequency resource density of 1/6. Therefore, the power P DMRS of DMRS on each RE can be expressed as the above formula.
  • the power of data (e.g., PDSCH) on each RE can be expressed as:
  • the power ratio ⁇ can be expressed as the following formula:
  • the network device can determine the power ratio of each scheduled DMRS port based on the currently scheduled number of DMRS ports occupying 1/3 and/or 1/6 of the time-frequency resources, that is, the values of n 1 and n 2 .
  • the density of time-frequency resources occupied by DMRS ports corresponding to different CDM groups is the same.
  • the first corresponding relationship may be as shown in Table 15.
  • the solution provided by the embodiment of the present application can flexibly indicate the power ratio of each DMRS port, thereby increasing the transmission power of the reference signal.
  • the network device can determine based on the first correspondence relationship shown in Tables 8 to 15 Power ratio of scheduled DMRS ports.
  • the number of the first CDM group is the "number of CDM groups that do not send data" shown in Table 8 to Table 15.
  • the network device After the network device determines the power ratio of the scheduled DMRS port according to the first correspondence relationship shown in Table 8 to Table 15, the network device can also map the reference signal to the corresponding time-frequency resource according to the time-frequency resource mapping rule. (Refer to S320).
  • the time-frequency resource mapping rules will be described in detail below in conjunction with the DMRS configuration types shown in Figures 4 to 7.
  • w f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′
  • w t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′
  • c It represents the expansion capability coefficient.
  • the specific value is as shown in any one of Table 22 to Table 25.
  • r(2n+k′) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.
  • w f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′
  • w t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′
  • c It represents the expansion capability coefficient. The specific value is as shown in any one of Table 22 to Table 25.
  • r(n) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.
  • Table 22 corresponds to the pattern obtained by single-symbol extension of configuration type 1;
  • Table 23 corresponds to the pattern obtained by double-sign extension of configuration type 1;
  • Table 24 corresponds to the pattern obtained by single-sign extension of configuration type 2;
  • Table 25 corresponds to the pattern obtained by single-sign extension of configuration type 2 Pattern obtained by configuring type 2 double sign extension.
  • the corresponding DMRS port is an existing port; when the port index value is 4 to 11, the corresponding DMRS port is a new port.
  • This application does not limit the index value of the new DMRS port.
  • the port index value of the new port can also be 8 to 15. That is, the antenna port P index values 1004 to 1011 in Table 22 can be replaced with 1008 to 1015 in sequence.
  • the corresponding DMRS port is an existing port, and when the port index value is 6 to 17, the corresponding DMRS port is a newly added port.
  • This application does not limit the index value of the newly added DMRS port.
  • the port index value of the newly added port can also be 12 to 23. That is, the antenna port P index values 1006 to 1017 in Table 22 can be replaced with 1012 to 1023 in sequence.
  • w f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′
  • w t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′, specifically The values are as shown in Table 26 to Table 29
  • r(2n+k′) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.
  • w f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′
  • w t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′, specifically The values are as shown in Table 26 to Table 29
  • r(n) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.
  • Table 26 corresponds to the pattern obtained by single-symbol extension of configuration type 1;
  • Table 27 corresponds to the pattern obtained by double-sign extension of configuration type 1;
  • Table 28 corresponds to the pattern obtained by single-symbol extension of configuration type 2;
  • Table 29 corresponds to Obtained from double sign extension of configuration type 2 pattern.
  • the corresponding DMRS port is a new port.
  • This application does not limit the index value of the new DMRS port.
  • the port index value of the new port can also be 8 to 15. That is, the antenna port P index values 1004 to 1011 in Table 22 can be replaced with 1008 to 1015 in sequence.
  • the corresponding DMRS port is a new port.
  • This application does not limit the index value of the new DMRS port.
  • the port index value of the new port can also be 12 to 23. That is, the antenna port P index values 1006 to 1017 in Table 28 can be replaced with 1012 to 1023 in sequence.
  • the network device can send the DMRS to the terminal device. Further, the network device sends indication information to the terminal device (refer to S330), the indication information DMRS configuration type, and the scheduled DMRS port.
  • the DMRS configuration type indicated by the network device may include any of the DMRS configuration types shown in Figures 4 to 7; the scheduled DMRS port indicated by the network device may be any row in Table 16 to Table 21. Therefore, the terminal device can receive DMRS based on the power ratio on the corresponding time-frequency resource according to the instruction information of the network device.
  • the above mainly introduces the scheme of sending reference signals in downlink communication, and the following briefly introduces the scheme of sending reference signals in uplink communication.
  • FIG. 8 is a schematic flowchart of another method 800 for sending and receiving reference signals provided by an embodiment of the present application. Each step in the method 800 is briefly described below, taking the reference signal as DMRS.
  • the network device determines a scheduled DMRS port.
  • the network device may determine the scheduled DMRS port according to the number of currently transmitted data streams.
  • the scheduled DMRS port corresponds to a DMRS configuration type.
  • the scheduled DMRS port belongs to a DMRS port set (first port set), and the first port set includes M DMRS ports.
  • the scheduled DMRS port is one or more of the M DMRS ports.
  • the M DMRS ports may be the most DMRS ports supported by the system.
  • the M DMRS ports correspond to N CDM groups.
  • the values of M and N may be different.
  • the description of the first port set and the values of N and M may refer to S310.
  • S820 The network device sends instruction information to the terminal device.
  • the terminal device receives the indication information from the network device.
  • the indication information includes indication information (first indication information) used to indicate the DMRS configuration type, or in other words, the first indication information is used to indicate the configuration type of the currently scheduled DMRS.
  • the indication information may be sent through RRC.
  • the indication information also includes indication information (second indication information) used to indicate the scheduled DMRS port, or in other words, the second indication information is used to indicate the DMRS port configured by the network device.
  • the indication information may be sent through DCI.
  • the terminal device determines the power ratio ⁇ according to the indication information.
  • the power ratio ⁇ is associated with the configuration type of the DMRS, the number of the first CDM group and the first parameter.
  • the first parameter is associated with the time-frequency resource occupied by the reference signal.
  • the first parameter may include at least one of the following:
  • the index of the antenna port associated with the reference signal is, for example, the index of the subcarrier occupied by the reference signal.
  • the terminal device may determine the configuration type of the reference signal according to the indication information from the network device.
  • the terminal device may determine the number of the first CDM group based on the currently scheduled DMRS port and the second corresponding relationship.
  • the second correspondence includes a correspondence between the currently scheduled DMRS ports and the number of the first CDM group.
  • the terminal device may determine the power ratio ⁇ according to the DMRS configuration type, the first parameter, and the number of the first CDM group.
  • S840 The terminal device sends DMRS based on the power ratio ⁇ on the scheduled DMRS port.
  • the network device receives the DMRS from the terminal device on the scheduled DMRS port.
  • the terminal device may also determine the DMRS based on the power ratio ⁇ , and map the DMRS sequence to the corresponding time-frequency resources according to the time-frequency resource mapping rule.
  • the terminal device's determination of DMRS based on the power ratio is similar to the network device's determination of DMRS. For details, please refer to the description in S320.
  • the method for transmitting a reference signal provided by the embodiment of the present application is described in detail above with reference to FIGS. 2 to 8 .
  • the following describes the communication device, network equipment and terminal equipment provided by the present application with reference to FIGS. 9 to 12 .
  • Figure 9 shows a schematic diagram of a communication device 900 provided by an embodiment of the present application.
  • the communication device 900 includes a transceiver unit 910 and a processing unit 920.
  • the transceiver unit 910 can be used to implement corresponding communication functions.
  • the transceiver unit 910 can also be called a communication interface or a communication unit.
  • the processing unit 920 can be used to perform data processing.
  • the communication device 900 also includes a storage unit, which can be used to store instructions and/or data, and the processing unit 920 can read the instructions and/or data in the storage unit, so that the device implements the aforementioned methods.
  • a storage unit which can be used to store instructions and/or data
  • the processing unit 920 can read the instructions and/or data in the storage unit, so that the device implements the aforementioned methods.
  • the communication device 900 can implement the steps or processes executed by the network device in the above method embodiment.
  • the transceiver unit 910 can be used to perform the operations related to the transceiver of the network device in the above method embodiment, such as the operations related to the transceiver of the network device in the embodiment shown in Figure 3 or Figure 8;
  • the processing unit 920 can be used to perform the operations related to the processing of the network device in the above method embodiment, such as the operations related to the processing of the network device in the embodiment shown in Figure 3 or Figure 8.
  • the communication device 900 may be the terminal device in the aforementioned embodiment, or may be a component (such as a chip) of the terminal device.
  • the communication device 900 can implement steps or processes corresponding to those executed by the terminal device in the above method embodiment.
  • the transceiver unit 910 can be used to perform the transceiver-related operations of the terminal device in the above method embodiment, such as the transceiver-related operations of the terminal device in the embodiment shown in Figure 3 or Figure 8;
  • the processing unit 920 can be used to perform the above method.
  • the processing-related operations of the terminal device in the embodiment are the processing-related operations of the terminal device in the embodiment as shown in FIG. 3 or FIG. 8 .
  • Figure 10 is a schematic block diagram of a communication device 1000 provided by an embodiment of the present application.
  • the apparatus 1000 includes a processor 1010 coupled to a memory 1030 .
  • a memory 1030 is also included for storing computer programs or instructions and/or data, and the processor 1010 is used to execute the computer programs or instructions stored in the memory 1030, or read the data stored in the memory 1030 to perform the above. Methods in Method Examples.
  • processors 1010 there are one or more processors 1010 .
  • the memory 1030 is integrated with the processor 1010, or is provided separately.
  • the device 1000 further includes a transceiver 1020, which is used for receiving and/or transmitting signals.
  • the processor 1010 is used to control the transceiver 1020 to receive and/or transmit signals.
  • the apparatus 1000 is used to implement the operations performed by the network device in each of the above method embodiments.
  • the processor 1010 is used to execute the computer program or instructions stored in the memory 1030 to implement the relevant operations of the network device in the above various method embodiments.
  • FIG. 11 shows a simplified schematic structural diagram of a base station.
  • the base station includes part 1110 and part 1120.
  • Part 1112 is mainly used for the transmission and reception of radio frequency signals and the conversion of radio frequency signals and baseband signals; part 1120 is mainly used for baseband processing and control of base stations.
  • Part 1110 can usually be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc.
  • Part 1120 is usually the control center of the base station, which can generally be called a processing unit, and is used to control the base station to perform processing operations on the network device side in the above method embodiments.
  • the transceiver unit of part 1110 can also be called a transceiver or transceiver, etc., which includes an antenna and a radio frequency circuit, where the radio frequency circuit is mainly used for radio frequency processing.
  • the device used to implement the receiving function in part 1110 can be regarded as a receiving unit
  • the device used to implement the sending function can be regarded as a sending unit, that is, part 1110 includes a receiving unit and a sending unit.
  • the receiving unit may also be called a receiver, receiver, or receiving circuit, etc.
  • the sending unit may be called a transmitter, transmitter, or transmitting circuit, etc.
  • Section 1120 may include one or more single boards, each of which may include one or more processors and one or more memories.
  • the processor is used to read and execute programs in the memory to implement baseband processing functions and control the base station. If there are multiple boards, each board can be interconnected to enhance processing capabilities. As an optional implementation, multiple single boards may share one or more processors, or multiple single boards may share one or more memories, or multiple single boards may share one or more processors at the same time. device.
  • the transceiver unit of part 1110 is used to perform transceiver-related steps performed by the network device in the embodiment shown in Figures 3 to 8; part 1120 is used to perform the implementation shown in Figures 3 to 8 The processing-related steps performed by the network device in the example.
  • FIG11 is only an example and not a limitation, and the above-mentioned network device including the transceiver unit and the processing unit may not rely on the structure shown in FIG11.
  • the chip When the communication device 1000 is a chip, the chip includes a transceiver unit and a processing unit.
  • the transceiver unit may be an input-output circuit or a communication interface;
  • the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip.
  • the communication device 1000 is used to implement the operations performed by the terminal device in each of the above method embodiments.
  • the processor 1010 is used to execute the computer program or instructions stored in the memory 1030 to implement the relevant operations of the terminal device in the above various method embodiments.
  • each step of the above method can be completed by instructions in the form of hardware integrated logic circuits or software in the processor 1010 .
  • the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware processor for execution, or can be executed by a combination of hardware and software modules in the processor.
  • the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
  • the storage medium is located in the memory 1030.
  • the processor 1010 reads the information in the memory 1030 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • FIG. 12 shows a simplified structural schematic diagram of the terminal device.
  • the terminal device is a mobile phone as an example.
  • the terminal equipment includes processor, memory, radio frequency circuits, antennas, and input and output devices.
  • the processor is mainly used to process communication protocols and communication data, control terminal equipment, execute software programs, process data of software programs, etc.
  • Memory is mainly used to store software programs and data.
  • Radio frequency circuits are mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal out in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor.
  • the processor converts the baseband signal into data and processes the data.
  • FIG. 12 In an actual terminal device product, there may be one or more processors and one or more memories. Memory can also be called storage media or storage devices.
  • the memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this application.
  • the antenna and the radio frequency circuit with the transceiver function can be regarded as the transceiver unit of the terminal device, and the processor with the processing function can be regarded as the processing unit of the terminal device.
  • the terminal device includes a transceiver unit 1210 and a processing unit 1220.
  • the transceiver unit 1210 may also be called a transceiver, a transceiver, a transceiver device, etc.
  • the processing unit 1220 may also be called a processor, a processing board, a processing module, a processing device, etc.
  • the devices used to implement the receiving function in the transceiver unit 1210 can be regarded as a receiving unit, and the devices used in the transceiver unit 1210 used to implement the transmitting function can be regarded as a transmitting unit, that is, the transceiver unit 1210 includes a receiving unit and a transmitting unit.
  • the transceiver unit may sometimes also be called a transceiver, transceiver, or transceiver circuit.
  • the receiving unit may also be called a receiver, receiver, or receiving circuit.
  • the sending unit may sometimes be called a transmitter, transmitter or transmitting circuit.
  • the transceiver unit 1210 is configured to perform receiving operations of the terminal devices in FIGS. 3 to 8 .
  • the processing unit 1220 is configured to perform processing actions on the terminal device side in FIGS. 3 to 8 .
  • FIG12 is merely an example and not a limitation, and the terminal device including the transceiver unit and the processing unit may not rely on the structure shown in FIG12 .
  • the chip When the communication device 1000 is a chip, the chip includes a transceiver unit and a processing unit.
  • the transceiver unit may be an input-output circuit or a communication interface;
  • the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip.
  • An embodiment of the present application also provides a network device, including: a processor, the processor is coupled to a memory, the memory is used to store programs or instructions, and when the programs or instructions are executed by the processor, the The network device performs the method for sending a reference signal as described in any one of the preceding items.
  • An embodiment of the present application also provides a network device, including a transceiver unit and a processing unit.
  • the transceiver unit may be used to perform the steps of sending and receiving by the network device in the above method embodiment.
  • the processing unit may be used to perform other steps of the network device in the above method embodiment except sending and receiving.
  • Embodiments of the present application also provide a computer-readable storage medium on which a computer program or instructions are stored.
  • the characteristic is that when the computer program or instructions are executed, the computer performs the sending reference as described in any one of the preceding paragraphs. Signal.
  • An embodiment of the present application also provides a computer program product.
  • the computer program product includes: computer program code.
  • the computer program code When the computer program code is run on a computer, it causes the computer to execute the method executed by the network device.
  • An embodiment of the present application also provides a computer program product.
  • the computer program product includes: computer program code.
  • the computer program code When the computer program code is run on a computer, it causes the computer to execute the method executed by the terminal device.
  • An embodiment of the present application also provides a communication system, which includes the network device and terminal device in the above embodiment.
  • the communication system includes: the network device and the terminal device in the embodiment described above in conjunction with FIGS. 3 to 8 .
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code. .

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Abstract

Un procédé pour envoyer et recevoir un signal de référence, et un appareil de communication, sont proposés dans la présente demande. Le procédé comprend les étapes suivantes : un dispositif de réseau détermine un rapport de puissance β ; et le dispositif de réseau envoie un signal de référence à un dispositif terminal sur la base du rapport de puissance β, dans lequel le rapport de puissance β est associé à un premier paramètre, à un type de configuration du signal de référence, et au nombre de premiers groupes de multiplexage par répartition en code (CDM), le premier paramètre étant associé à une première ressource temps-fréquence occupée par le signal de référence, et les premiers groupes CDM sont des groupes CDM qui n'envoient pas de données. Un rapport de puissance β est associé à un premier paramètre, à un type de configuration d'un signal de référence, et au nombre de premiers groupes CDM, de telle sorte que le rapport de puissance d'un port de signal de référence peut être indiqué de manière plus flexible, et que la puissance de transmission pour envoyer le signal de référence peut être améliorée.
PCT/CN2023/119831 2022-09-20 2023-09-19 Procédé pour envoyer et recevoir un signal de référence, et appareil de communication WO2024061236A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109511162A (zh) * 2017-09-15 2019-03-22 株式会社Kt 用于在新无线电中控制dmrs的传输功率的装置和方法
CN110266459A (zh) * 2018-05-11 2019-09-20 华为技术有限公司 通信的方法和通信装置
WO2020090623A1 (fr) * 2018-10-31 2020-05-07 シャープ株式会社 Dispositif terminal et procédé de communication
CN112272962A (zh) * 2018-04-06 2021-01-26 株式会社Ntt都科摩 用户终端

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109511162A (zh) * 2017-09-15 2019-03-22 株式会社Kt 用于在新无线电中控制dmrs的传输功率的装置和方法
CN112272962A (zh) * 2018-04-06 2021-01-26 株式会社Ntt都科摩 用户终端
CN110266459A (zh) * 2018-05-11 2019-09-20 华为技术有限公司 通信的方法和通信装置
WO2020090623A1 (fr) * 2018-10-31 2020-05-07 シャープ株式会社 Dispositif terminal et procédé de communication

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