CN117792588A

CN117792588A - Method for transmitting and receiving reference signal and communication device

Info

Publication number: CN117792588A
Application number: CN202211143839.1A
Authority: CN
Inventors: 董昶钊; 高翔; 刘鹍鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2024-03-29
Also published as: WO2024061236A1

Abstract

The application provides a method for transmitting and receiving a reference signal and a communication device, wherein the method comprises the steps that network equipment determines a power ratio beta; the network equipment sends a reference signal to the terminal equipment based on the power ratio beta; the power ratio β is associated with a first parameter, a configuration type of the reference signal, and a number of first CDM groups of CDM groups that do not transmit data, where the first parameter is associated with a first time-frequency resource occupied by the reference signal. By associating the power ratio β with the first parameter, the configuration type of the reference signal and the number of the first CDM groups for code division multiplexing, the power ratio of the reference signal port can be more flexibly indicated, and thus the transmission power of the transmitted reference signal can be improved.

Description

Method for transmitting and receiving reference signal and communication device

Technical Field

The embodiments of the present application relate to the field of communications, and more particularly, to a method for transmitting and receiving a reference signal, and a communication device.

Background

The multiple-input multiple-output (multiple input multiple output, MIMO) technology is the fifth generation (the 5) ^th Generation, 5G) one of the key technologies for communication. When MIMO is adopted to transmit data, the receiving terminal equipment can rootChannel estimation is performed based on the received reference signals (e.g., demodulation reference signals (demodulation reference signal, DMRS)).

The transmit power of the reference signal is one of the factors affecting the accuracy of the channel estimation. When the transmission power is large, the accuracy of channel estimation is also high. In order to fully utilize the transmit power and improve the accuracy of channel estimation, the prior art adopts a full power utilization (full power tilization) principle, i.e. transmit power of an idle port is borrowed for an active port to use on the same time-frequency resource (e.g. Resource Element (RE)). The relationship between the power that the active port borrows from the idle port and the initial transmit power that the network device pre-configures for the active port may be represented by a power boost (power boost) value (or power offset value), an offset value, etc.

The New Radio (NR) protocol defines power enhancement values corresponding to different ports in advance, and the terminal device may determine the power enhancement value of each port according to the indication of the network device. However, for scenarios with more ports requirements, using existing protocols to indicate the power boost values of the ports is often not flexible enough.

Disclosure of Invention

The embodiment of the application provides a method and a communication device for sending and receiving a reference signal, which can support more flexible indication of the power ratio of a reference signal port, so that the transmitting power of the reference signal can be improved.

In a first aspect, a method for transmitting a reference signal is provided, which may be performed by a network device, or may be performed by a chip or a circuit configured in the network device, which is not limited in this application.

The method includes the network device determining a power ratio β; the network equipment sends a reference signal to the terminal equipment based on the power ratio beta; the power ratio β is associated with a first parameter, a configuration type of the reference signal, and a number of first CDM groups of CDM groups that do not transmit data, where the first parameter is associated with a first time-frequency resource occupied by the reference signal.

Based on the above scheme, by associating the power ratio β 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, and further can improve the transmission power of the transmitted reference signal.

With reference to the first aspect, in certain implementations of the first aspect, the first parameter includes at least one of the following parameters: an index of an antenna port associated with the reference signal, an index of time-frequency resources occupied by the reference signal, and a ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources occupied by data corresponding to the reference signal.

Based on the above scheme, the network device may flexibly indicate the power ratio of the reference signal port through the index of the antenna port associated with the reference signal, the index of the time-frequency resource occupied by the reference signal, at least one of the ratio of the number of the time-frequency resources occupied by the reference signal to the number of the time-frequency resources occupied by the data corresponding to the reference signal, the configuration type of the reference signal and the number of the first code division multiplexing CDM group, and further may improve the transmission power of the transmitted reference signal.

With reference to the first aspect, in some implementations of the first aspect, the reference signal is a first reference signal corresponding to a first port, the first port is one port in a first port set, the ports in the first port set correspond to N CDM groups, time-frequency resources corresponding to each CDM group in the N CDM groups are not coincident, and N is an integer greater than or equal to 3.

Illustratively, the ports in the first port set may be ports supported by a reference signal configuration type or reference signal pattern in the system.

Based on the above scheme, for the case that the reference signal ports supported by the system correspond to N CDM groups, and the value of N is greater than or equal to 3, by associating the power ratio β 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 ports can be more flexibly indicated.

With reference to the first aspect, in some implementations of the first aspect, the N is 3 or 4, a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal is 1/4, or the N is 4 or 5 or 6, and a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal is 1/6.

Based on the above scheme, for the case that the reference signal ports supported by the system correspond to N CDM groups, the value of N may be any one of 3, 4, 5 or 6, and for the case that there is a reference signal port with an occupied time-frequency resource density of 1/4 or 1/6 in the reference signal ports supported by the system, by associating the power ratio β 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 may be more flexibly indicated.

With reference to the first aspect, in some implementations of the first aspect, the first port set further includes a second port, where a ratio of a number of time-frequency resources occupied by a second reference signal of the second port to a number of time-frequency resources occupied by data corresponding to the second reference signal is different from a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal.

Based on the above scheme, for the case that the reference signal ports supported by the system correspond to N CDM groups, the value of N is greater than or equal to 3, and there are reference signal ports occupying different densities of time-frequency resources in the reference signal ports, by associating the power ratio β with the first parameter, the configuration type of the reference signal and the number of the first CDM groups can more flexibly indicate the power ratio of the reference signal ports.

With reference to the first aspect, in certain implementations of the first aspect, the first parameter further includes a value of the N.

Based on the above scheme, for the case that the currently scheduled reference signal includes the existing reference signal port, the power ratio thereof can be flexibly indicated.

With reference to the first aspect, in some implementations of the first aspect, the network device sends indication information to the terminal device, where the indication information includes first indication information and second indication information, the first indication information indicates a reference signal configuration type corresponding to the reference signal, and the second indication information indicates an index of an antenna port associated with the reference signal.

Based on the scheme, the indication information is sent to the terminal equipment through the network equipment, so that the terminal equipment can determine the power ratio of the reference signal port according to the indication information.

With reference to the first aspect, in certain implementations of the first aspect, the network device determines a power scaling factor from the power ratio βThe network device is based on the power scaling factor +.>Transmitting the reference signal to the terminal equipment; wherein the power ratio beta and the power scaling factor +.>The following relationship is satisfied: />

With reference to the first aspect, in certain implementations of the first aspect, the network device is based on the power scaling factorMapping the reference signal to a corresponding time-frequency resource by a time-frequency resource mapping rule, and transmitting the reference signal to the terminal equipment through the time-frequency resource, wherein a reference signal port p corresponds to a reference signal sequence +. >Reference letterNumber sequence->Elements mapped on kth subcarrier and the ith symbol +.>The following relationship is satisfied:

k′＝0,1

c＝1,2

n＝0,1,...

l′＝0,1

wherein,for a power scaling factor, the power scaling factor +.>And the power ratio beta and satisfies the following relationship: />w _f (k') is the frequency domain mask element, w, corresponding to the subcarrier with index k _t (l ') is a time domain mask element corresponding to an OFDM symbol with index l'; c, representing a capacity expansion capacity coefficient; r (2n+k') is a base sequence mapElements on the kth subcarrier and the l symbol.

With reference to the first aspect, in certain implementations of the first aspect, the network device is based on the power scaling factorMapping the reference signal to a corresponding time-frequency resource by a time-frequency resource mapping rule, and transmitting the reference signal to the terminal equipment through the time-frequency resource, wherein a reference signal port p corresponds to a reference signal sequence +.>Reference signal sequence->Elements mapped on kth subcarrier and the ith symbol +.>The following relationship is satisfied:

k′＝0,1

n＝0,1,...

l′＝0,1

wherein,for a power scaling factor, the power scaling factor +.>And the power ratio beta and satisfies the following relationship: />w _f (k') is the frequency domain mask element, w, corresponding to the subcarrier with index k _t (l ') is a time domain mask element corresponding to an OFDM symbol with index l'; r (2n+k') is an element of the base sequence mapped on the kth subcarrier and the l symbol.

Based on the above scheme, in the case that the reference signal ports supported by the system correspond to N CDM groups, 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 ports, by associating the power ratio β 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 may flexibly indicate the power ratio of the reference signal ports, map the reference signal to the corresponding time-frequency resources based on the power ratio and the time-frequency resource mapping rule, and transmit the reference signal through the time-frequency resources.

In a second aspect, a method for receiving a reference signal is provided, which may be performed by a terminal device, or may be performed by a chip or a circuit configured in the terminal device, which is not limited in this application.

The method comprises the steps that terminal equipment determines a power ratio beta; the terminal equipment receives a reference signal based on the power ratio beta; the power ratio β is associated with a first parameter, a configuration type of the reference signal, and a number of first CDM groups of CDM groups that do not transmit data, where the first parameter is associated with a first time-frequency resource occupied by the reference signal.

Based on the above scheme, by associating the power ratio β 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 receive the reference signal according to the power ratio of the reference signal port.

With reference to the second aspect, in certain implementations of the second aspect, the first parameter includes at least one of the following parameters: an index of an antenna port associated with the reference signal, an index of time-frequency resources occupied by the reference signal, and a ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources occupied by data corresponding to the reference signal.

Based on the above scheme, the terminal device may flexibly determine the power ratio of the reference signal port and receive the reference signal by using the index of the antenna port associated with the reference signal, the index of the time-frequency resource occupied by the reference signal, at least one of the ratio of the number of the time-frequency resource occupied by the reference signal to the number of the time-frequency resource occupied by the data corresponding to the reference signal, the configuration type of the reference signal, and the number of the first code division multiplexing CDM group.

With reference to the second aspect, in some implementations of the second aspect, the reference signal is a first reference signal corresponding to a first port, the first port is one port in a first port set, the ports in the first port set correspond to N CDM groups, time-frequency resources corresponding to each CDM group in the N CDM groups are not coincident, and N is an integer greater than or equal to 3.

With reference to the second aspect, in some implementations of the second aspect, the N is 3 or 4, a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal is 1/4, or the N is 4 or 5 or 6, and a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal is 1/6.

With reference to the second aspect, in some implementations of the second aspect, the first port set further includes a second port, and a ratio of a number of time-frequency resources occupied by a second reference signal of the second port to a number of time-frequency resources occupied by data corresponding to the second reference signal is different from a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal.

With reference to the second aspect, in certain implementations of the second aspect, the first parameter further includes a value of the N.

With reference to the second aspect, in some implementations of the second aspect, the terminal device receives indication information from the network device, where the indication information includes first indication information and second indication information, the first indication information indicates a reference signal configuration type corresponding to the reference signal, and the second indication information indicates an index of an antenna port associated with the reference signal; the terminal equipment determines the power ratio beta according to the reference signal configuration type corresponding to the reference signal and the index of the antenna port associated with the reference signal.

With reference to the second aspect, in some implementations of the second aspect, the terminal device determines a power scaling factor according to the power ratio βThe terminal device is based on the power scaling factor +.>Receiving the reference signal; wherein the power ratio beta and the power scaling factor +.>The following relationship is satisfied: />

With reference to the second aspect, in certain implementations of the second aspect, the terminal device is based on the power scaling factorThe reference signal is received on the corresponding time-frequency resource by the time-frequency resource mapping rule, wherein the reference signal port p corresponds to the reference signal sequence +.>Reference signal sequence->Elements mapped on kth subcarrier and the ith symbol +.>The following relationship is satisfied:

k′＝0,1

c＝1,2

n＝0,1,...

l′＝0,1

wherein,for a power scaling factor, the power scaling factor +.>And the power ratio beta and satisfies the following relationship: />w _f (k') is the frequency domain mask element, w, corresponding to the subcarrier with index k _t (l ') is a time domain mask element corresponding to an OFDM symbol with index l'; c, representing a capacity expansion capacity coefficient; r (2n+k') is an element of the base sequence mapped on the kth subcarrier and the l symbol.

With reference to the second aspect, in certain implementations of the second aspect, the terminal device is based on the power scaling factor The reference signal is received on the corresponding time-frequency resource by the time-frequency resource mapping rule, wherein the reference signal port p corresponds to the reference signal sequence +.>Reference signal sequence->Elements mapped on kth subcarrier and the ith symbol +.>The following relationship is satisfied:

k′＝0,1

n＝0,1,...

l′＝0,1

Based on the above scheme, in the case that the reference signal ports supported by the system correspond to N CDM groups, 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 ports, by associating the power ratio β 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 may flexibly determine the power ratio of the reference signal ports, and receive the reference signal based on the power ratio and the time-frequency resource mapping rule.

In a third aspect, a method for transmitting a reference signal is provided, which may be performed by a network device, or may also be performed by a chip or a circuit configured in the network device, which is not limited in this application.

The method comprises the following steps: the network equipment generates a reference signal based on the power ratio beta; the network equipment sends the reference signal to the terminal equipment; the reference signal comprises a first reference signal corresponding to a first port, wherein the first port is one 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, and the N CDM groups comprise at least one type of CDM group; the power ratio β is associated with a number of first CDM groups, which are CDM groups of the N CDM groups that do not transmit data, a configuration type of the reference signal, and a first parameter including a number of ports corresponding to each type of CDM group of the at least one type of CDM.

Based on the above scheme, by associating the power ratio β 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 more flexibly indicate the power ratio of the reference signal port, and further can increase the transmission power of the transmitted reference signal.

With reference to the third aspect, in some implementations of the third aspect, the at least one CDM group includes a first type of CDM group and a second type of CDM group, the first type of CDM group occupies a different density of time-frequency resources than the second type of CDM group occupies, and the first parameter includes a number n of reference signal ports corresponding to the first type of CDM group ₁ And the number n of ports corresponding to the CDM group of the second type ₂ 。

Based on the above scheme, for the case that the reference signal ports supported by the system correspond to N CDM groups, and there are reference signal ports occupying different densities of time-frequency resources in the reference signal ports, by associating the power ratio β 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 ports can be more flexibly indicated.

With reference to the third aspect, in some implementations of the third aspect, the N is 3 or 4, a ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by data corresponding to the first reference signal is 1/4, or the N is 4 or 5 or 6, and a ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by data corresponding to the first reference signal is 1/6.

With reference to the third aspect, in some implementations of the third aspect, the network device sends indication information to the terminal device, where the indication information includes first indication information and second indication information, the first indication information indicates a reference signal configuration type corresponding to the reference signal, and the second indication information indicates an index of an antenna port associated with the reference signal.

With reference to the third aspect, in some implementations of the third aspect, the network device determines a power scaling factor from the power ratio βThe network device is based on the power scaling factor +.>Transmitting the reference signal to the terminal equipment; wherein the power ratio beta and the power scaling factor +.>The following relationship is satisfied: />

With reference to the third aspect, in some implementations of the third aspect, the network device is based on the power scaling factorMapping the reference signal to a corresponding time-frequency resource by a time-frequency resource mapping rule, and transmitting the reference signal to the terminal equipment through the time-frequency resource, wherein a reference signal port p corresponds to a reference signal sequence +. >Reference signal sequence->Elements mapped on kth subcarrier and the ith symbol +.>The following relationship is satisfied:

k′＝0,1

c＝1,2

n＝0,1,...

l′＝0,1

With reference to the third aspect, in some implementations of the third aspect, the network device is based on the power scaling factorMapping the reference signal to a corresponding time-frequency resource by a time-frequency resource mapping rule, and transmitting the reference signal to the terminal equipment through the time-frequency resource, wherein a reference signal port p corresponds to a reference signal sequence +.>Reference signal sequence->Elements mapped on kth subcarrier and the ith symbol +.>The following relationship is satisfied:

k′＝0,1

n＝0,1,...

l′＝0,1

In a fourth aspect, a method for receiving a reference signal is provided, which may be performed by a terminal device, or may be performed by a chip or a circuit configured in the terminal device, which is not limited in this application.

The method comprises the following steps: the terminal equipment determines a power ratio beta; the terminal equipment receives a reference signal based on the power ratio beta; the reference signal comprises a first reference signal corresponding to a first port, wherein the first port is one 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, and the N CDM groups comprise at least one type of CDM group; the power ratio β is associated with a number of first CDM groups, which are CDM groups of the N CDM groups that do not transmit data, a configuration type of the reference signal, and a first parameter including a number of ports corresponding to each type of CDM group of the at least one type of CDM.

With reference to the fourth aspect, in some implementations of the fourth aspect, the at least one CDM group includes a first type of CDM group and a second type of CDM group, the first type of CDM group occupies a different density of time-frequency resources than the second type of CDM group occupies, and the first parameter includes a number n of reference signal ports corresponding to the first type of CDM group ₁ And the number n of ports corresponding to the CDM group of the second type ₂ 。

Based on the above scheme, for the case that the reference signal ports supported by the system correspond to N CDM groups, and there are reference signal ports occupying different densities of time-frequency resources in the reference signal ports, by associating the power ratio β 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 ports can be flexibly indicated.

With reference to the fourth aspect, in some implementations of the fourth aspect, the N is 3 or 4, a ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by data corresponding to the first reference signal is 1/4, or the N is 4 or 5 or 6, and a ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by data corresponding to the first reference signal is 1/6.

With reference to the fourth aspect, in some implementations of the fourth aspect, the terminal device receives indication information from the network device, where the indication information includes first indication information and second indication information, the first indication information indicates a reference signal configuration type corresponding to the reference signal, and the second indication information indicates an index of an antenna port associated with the reference signal; the terminal device determines the first parameter according to an index of an antenna port associated with a reference signal, and determines the power ratio according to the first parameter, a configuration type of the reference signal, and the number of first CDM groups.

With reference to the fourth aspect, in some implementations of the fourth aspect, the terminal device determines a power scaling factor according to the power ratio βAnd according to->Receiving the reference signal; wherein the power ratio beta and the power scaling factorThe following relationship is satisfied: />

With reference to the fourth aspect, in some implementations of the fourth aspect, the terminal device is based on the power scaling factor The reference signal is received on the corresponding time-frequency resource by the time-frequency resource mapping rule, wherein the reference signal port p corresponds to the reference signal sequence +.>Reference signal sequence->Elements mapped on kth subcarrier and the ith symbol +.>The following relationship is satisfied:

k′＝0,1

c＝1,2

n＝0,1,...

l′＝0,1

With reference to the fourth aspect, in some implementations of the fourth aspect, the terminal device is based on the power scaling factorThe reference signal is received on the corresponding time-frequency resource by the time-frequency resource mapping rule, wherein the reference signal port p corresponds to the reference signal sequence +.>Reference signal sequence->Elements mapped on kth subcarrier and the ith symbol +.>The following relationship is satisfied:

k′＝0,1

n＝0,1,...

l′＝0,1

In a fifth aspect, a communication device is provided, the communication device comprising a processing unit and a transceiver unit, the processing unit being configured to determine a power ratio β; the receiving and transmitting unit is used for transmitting a reference signal to the terminal equipment based on the power ratio beta; the power ratio β is associated with a first parameter, a configuration type of the reference signal, and a number of first CDM groups of CDM groups that do not transmit data, where the first parameter is associated with a first time-frequency resource occupied by the reference signal.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the first parameter includes at least one of the following parameters: an index of an antenna port associated with the reference signal, an index of time-frequency resources occupied by the reference signal, and a ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources occupied by data corresponding to the reference signal.

With reference to the fifth aspect, in some implementations of the fifth aspect, the reference signal is a first reference signal corresponding to a first port, the first port is one port in a first port set, the ports in the first port set correspond to N CDM groups, time-frequency resources corresponding to each CDM group in the N CDM groups are not coincident, and N is an integer greater than or equal to 3.

With reference to the fifth aspect, in some implementations of the fifth aspect, the N is 3 or 4, a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal is 1/4, or the N is 4 or 5 or 6, and a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal is 1/6.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first port set further includes a second port, and a ratio of a number of time-frequency resources occupied by a second reference signal of the second port to a number of time-frequency resources occupied by data corresponding to the second reference signal is different from a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the first parameter further includes a value of the N.

With reference to the fifth aspect, in some implementations of the fifth aspect, 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, the first indication information indicates a reference signal configuration type corresponding to the reference signal, and the second indication information indicates an index of an antenna port associated with the reference signal.

With reference to the fifth aspect, in certain implementation manners of the fifth aspect, the processing unit is specifically configured to determine a power scaling factor according to the power ratio βThe transceiver unit is specifically configured to scale the power based on the power scaling factor- >Transmitting the reference signal to the terminal equipment; wherein the power ratio beta and the power scaling factor +.>The following relationship is satisfied:

in a sixth aspect, a communication device is provided, the communication device comprising a processing unit and a transceiver unit, the processing unit being configured to determine a power ratio β; the receiving and transmitting unit is used for receiving a reference signal based on the power ratio beta; the power ratio β is associated with a first parameter, a configuration type of the reference signal, and a number of first CDM groups of CDM groups that do not transmit data, where the first parameter is associated with a first time-frequency resource occupied by the reference signal.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the first parameter includes at least one of the following parameters: an index of an antenna port associated with the reference signal, an index of time-frequency resources occupied by the reference signal, and a ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources occupied by data corresponding to the reference signal.

With reference to the sixth aspect, in some implementations of the sixth aspect, the reference signal is a first reference signal corresponding to a first port, the first port is one port in a first port set, the ports in the first port set correspond to N CDM groups, 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.

With reference to the sixth aspect, in some implementations of the sixth aspect, the N is 3 or 4, a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal is 1/4, or the N is 4 or 5 or 6, and a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal is 1/6.

With reference to the sixth aspect, in some implementations of the sixth aspect, the first port set further includes a second port, and a ratio of a number of time-frequency resources occupied by a second reference signal of the second port to a number of time-frequency resources occupied by data corresponding to the second reference signal is different from a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the first parameter further includes a value of the N.

With reference to the sixth aspect, in some implementations of the sixth aspect, 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 information indicates a reference signal configuration type corresponding to the reference signal, and the second indication information indicates an index of an antenna port associated with the reference signal; the processing unit is specifically used for: and determining the power ratio beta according to the reference signal configuration type corresponding to the reference signal and the index of the antenna port associated with the reference signal.

With reference to the sixth aspect, in certain implementation manners of the sixth aspect, the processing unit is specifically configured to determine a power scaling factor according to the power ratio βThe transceiver unit is specifically configured to scale the power based on the power scaling factor->Receiving the reference signal; wherein the power ratio beta and the power scaling factor +.>The following relationship is satisfied: />

In a seventh aspect, a communication apparatus is provided, the apparatus comprising a processing unit and a transceiver unit, the processing unit configured to generate a reference signal based on a power ratio β; the receiving and transmitting unit is used for transmitting the reference signal to the terminal equipment; the reference signal comprises a first reference signal corresponding to a first port, wherein the first port is one 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, and the N CDM groups comprise at least one type of CDM group; the power ratio β is associated with a number of first CDM groups, which are CDM groups of the N CDM groups that do not transmit data, a configuration type of the reference signal, and a first parameter including a number of ports corresponding to each type of CDM group of the at least one type of CDM.

With reference to the seventh aspect, in some implementations of the seventh aspect, the at least one CDM group includes a first type of CDM group and a second type of CDM group, the first type of CDM group occupies a different density of time-frequency resources than the second type of CDM group occupies, and the first parameter includes a number n of reference signal ports corresponding to the first type of CDM group ₁ And the number n of ports corresponding to the CDM group of the second type ₂ 。

With reference to the seventh aspect, in some implementations of the seventh aspect, the N is 3 or 4, a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal is 1/4, or the N is 4 or 5 or 6, and a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal is 1/6.

With reference to the seventh aspect, in some implementations of the seventh aspect, 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, the first indication information indicates a reference signal configuration type corresponding to the reference signal, and the second indication information indicates an index of an antenna port associated with the reference signal.

With reference to the seventh aspect, in certain implementation manners of the seventh aspect, the processing unit is specifically configured to determine a power scaling factor according to the power ratio βThe transceiver unit is specifically configured to scale the power based on the power scaling factor->Transmitting the reference signal to the terminal equipment; wherein the power ratio beta and the power scaling factor +.>The following relationship is satisfied:

in an eighth aspect, a communication device is provided, the device comprising a processing unit and a transceiver unit, the processing unit being configured to determine a power ratio β; the receiving and transmitting unit is used for receiving a reference signal based on the power ratio beta; the reference signal comprises a first reference signal corresponding to a first port, wherein the first port is one 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, and the N CDM groups comprise at least one type of CDM group; the power ratio β is associated with a number of first CDM groups, which are CDM groups of the N CDM groups that do not transmit data, a configuration type of the reference signal, and a first parameter including a number of ports corresponding to each type of CDM group of the at least one type of CDM.

With reference to the eighth aspect, in some implementations of the eighth aspect, the at least one CDM group includes a first type of CDM group and a second type of CDM group, the first type of CDM group occupies a different density of time-frequency resources than the second type of CDM group occupies, and the first parameter includes a number n of reference signal ports corresponding to the first type of CDM group ₁ And the number n of ports corresponding to the CDM group of the second type ₂ 。

With reference to the eighth aspect, in some implementations of the eighth aspect, the N is 3 or 4, a 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 a 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.

With reference to the eighth aspect, in certain implementation manners of the eighth aspect, the transceiver unit is further configured to receive indication information from a network device, where the indication information includes first indication information and second indication information, where the first indication information indicates a reference signal configuration type corresponding to the reference signal, and the second indication information indicates an index of an antenna port associated with the reference signal; the terminal device determines the first parameter according to an index of an antenna port associated with a reference signal, and determines the power ratio according to the first parameter, a configuration type of the reference signal, and the number of first CDM groups.

With reference to the eighth aspect, in some implementations of the eighth aspect, the processing unit is specifically configured to determine a power scaling factor according to the power ratio βThe transceiver unit is particularly adapted to receive and transmit signals according to +.>Receiving the reference signal; wherein the power ratio beta and the power scaling factor +.>The following relationship is satisfied: />

In a ninth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute instructions in the memory to implement the method of the first aspect, the third aspect and any one of the possible implementation manners of the first aspect and the third aspect. Illustratively, the communications apparatus further comprises a memory. The communication device also includes a communication interface with which the processor is coupled.

In one implementation, the communication apparatus is a network device. When the communication apparatus is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in a network device. When the communication device is a chip configured in a network apparatus, the communication interface may be an input/output interface.

The transceiver may be, for example, a transceiver circuit. The input/output interface may be an input/output circuit.

In a tenth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute instructions in the memory to implement the method of the second aspect and the fourth aspect and any one of the possible implementation manners of the second aspect and the fourth aspect. Illustratively, the communications apparatus further comprises a memory. The communication device also includes a communication interface with which the processor is coupled.

In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in the terminal device. When the communication device is a chip configured in a terminal apparatus, the communication interface may be an input/output interface.

In an eleventh aspect, there is provided a processor comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive signals via the input circuit and to transmit signals via the output circuit, such that the processor performs the method of any one of the possible implementations of the first to fourth aspects.

In a specific implementation process, the processor may be one or more chips, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the output signal may be output by, for example and without limitation, a transmitter and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit, which functions as the input circuit and the output circuit, respectively, at different times. The embodiments of the present application do not limit the specific implementation manner of the processor and the various circuits.

In a twelfth aspect, a processing device is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory and is configured to receive signals via the receiver and to transmit signals via the transmitter to perform the method of any one of the possible implementations of the first to fourth aspects.

Illustratively, the processor is one or more and the memory is one or more.

The memory may be integrated with the processor or may be separate from the processor, for example.

In a specific implementation process, the memory may be a non-transient (non-transitory) memory, for example, a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

It should be appreciated that the related data interaction process, for example, transmitting the indication information, may be a process of outputting the indication information from the processor, and the receiving the capability information may be a process of receiving the input capability information by the processor. Specifically, the data output by the processor may be output to the transmitter, and the input data received by the processor may be from the receiver. Wherein the transmitter and receiver may be collectively referred to as a transceiver.

The processing means in the twelfth aspect may be one or more chips. The processor in the processing device may be implemented by hardware or may be implemented by software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor, implemented by reading software code stored in a memory, which may be integrated in the processor, or may reside outside the processor, and exist separately.

In a thirteenth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions) which, when executed, causes a computer to perform the method of any one of the possible implementations of the first to fourth aspects.

In a fourteenth aspect, there is provided a computer readable storage medium storing a computer program (which may also be referred to as code, or instructions) which, when run on a computer, causes the method of any one of the possible implementations of the first to fourth aspects described above to be performed.

A fifteenth aspect provides a communication system comprising at least one terminal device and at least one network device for performing the method of any one of the possible implementations of the first to fourth aspects.

Drawings

Fig. 1 is a schematic diagram of a communication system to which the method according to the embodiment of the present application is applicable.

Fig. 2 is a reference signal pattern of two configuration types in the current standard.

Fig. 3 is a schematic flowchart of a method for transmitting a reference signal according to an embodiment of the present application.

Fig. 4 to 7 show several examples of reference signal patterns provided by embodiments of the present application.

Fig. 8 is a schematic flow chart of another method for transmitting a reference signal according to an embodiment of the present application.

Fig. 9 is a schematic diagram of a communication device according to an embodiment of the present application.

Fig. 10 is a schematic diagram of another communication device according to an embodiment of the present application.

Fig. 11 is a schematic block diagram of a network device of an embodiment of the present application.

Fig. 12 is a schematic block diagram of a terminal device of an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: fifth generation (5) ^th generation, 5G) system or New Radio (NR), evolved packet core (evolved packet core, EPC), evolved packet system (evolved packet system, EPS), evolved universal mobile telecommunications system (univeRMal mobile telecommunication system, UMTS) terrestrial radio access network (evolved UMTS terrestrial radio access network, E-UTRAN), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), etc. The technical scheme provided by the application can also be applied to future communication systems, such as a sixth generation mobile communication system.

The technical solutions of the embodiments of the present application may also be applied to device-to-device (D2D) communication, vehicle-to-device (V2X) communication, machine-to-machine (machine to machine, M2M) communication, machine type communication (machine type communication, MTC), and internet of things (internet of things, ioT) communication systems or other communication systems.

The terminal device in the embodiments of the present application may be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment.

The terminal device may be a device that provides voice/data to a user, e.g., a handheld device with wireless connection, an in-vehicle device, etc. Currently, some terminals may be, for example: a mobile phone, tablet, laptop, palmtop, mobile internet device (mobile internet device, MID), wearable device, virtual Reality (VR) device, augmented reality (augmented reality, AR) device, wireless terminal in industrial control (industrial control), wireless terminal in unmanned (self driving), wireless terminal in teleoperation (remote medical surgery), wireless terminal in smart grid (smart grid), wireless terminal in transportation security (transportation safety), wireless terminal in smart city (smart city), wireless terminal in smart home (smart home), cellular phone, cordless phone, session initiation protocol (session initiation protocol, SIP) phone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication function, computing device or other processing device connected to wireless modem, wearable device, terminal device in 5G network or terminal in future evolved land mobile communication network (public land mobile network), and the like, without limiting the present application.

By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device, and the wearable device can be a generic name for intelligently designing daily wearing and developing wearable devices by applying wearable technology, such as glasses, gloves, watches, clothes, shoes and the like. Alternatively, the wearable device is a portable device that may be worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

In addition, in the embodiment of the application, the terminal device may also be a terminal device in an IoT system, where IoT is an important component of future information technology development, and the main technical feature is to connect the article with a network through a communication technology, so as to implement man-machine interconnection and an intelligent network for interconnecting the articles.

In addition, the terminal device may further include sensors such as an intelligent printer, a train detector, and a gas station, and the main functions include collecting data (part of the terminal device), receiving control information and downlink data of the network device, and transmitting electromagnetic waves to transmit uplink data to the network device.

The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may be a next generation base station (gndeb, gNB) in a 5G communication system, a next generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access Node in a WiFi system, or the like, an evolved Node B (eNB) in an LTE system, a radio network controller (radio network controller, RNC), a Node B (NB), a base station controller (base station controller, BSC), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a Base Band Unit (BBU), a transmission reception point (transmission reception point, TRP), a transmission point (transmitting point, TP), a base transceiver station (base transceiver station, BTS), or the like.

In one network architecture, 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 serve a cell, where the terminal device communicates with the base station through a transmission resource (e.g., a frequency domain resource, or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the 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 (small cell), where the small cell may include: urban cells (metro cells), micro cells (micro cells), pico cells (pico cells), femto cells (femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services. The network device may be a macro base station, a micro base station or an indoor station, a relay node or a donor node, a device in a V2X communication system that provides a wireless communication service for a user device, a wireless controller in a cloud wireless access network (cloud radio access network, CRAN) scenario, a relay station, a vehicle-mounted device, a wearable device, a network device in a future evolution network, and the like. The embodiments of the present application do not limit the specific technology and the specific device configuration adopted by the network device.

In the embodiment of the application, the terminal device or the network device may include a hardware layer, an operating system layer running above the hardware layer, and an application layer running above the operating system layer. The hardware layer includes hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like. Further, the embodiment of the present application is not particularly limited to the specific structure of the execution body of the method provided in the embodiment of the present application, as long as the communication can be performed by the method provided in the embodiment of the present application by running the program recorded with the code of the method provided in the embodiment of the present application, and for example, the execution body of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call the program and execute the program.

Fig. 1 is an exemplary architecture diagram of a communication system 100 suitable for use in embodiments of the present application. As shown in fig. 1, 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 102-107 shown in fig. 1. Wherein the terminal devices 102 to 107 may be mobile or stationary. Network device 101 may provide communication coverage for a particular geographic area and terminal devices 102-107 may be terminal devices located within the coverage area. One or more of network device 101 and terminal devices 102-107 may each communicate over a wireless link.

Alternatively, the terminal devices may communicate directly with each other. Direct communication between terminal devices may be implemented, for example, using device-to-device (D2D) technology or the like. As shown in fig. 1, communication may be directly performed between the terminal device 105 and the terminal device 106, and between the terminal device 105 and the terminal device 107 using D2D technology. Terminal device 106 and terminal device 107 may communicate with terminal device 105 separately or simultaneously.

Terminal devices 105 to 107 may also communicate with network device 101, respectively. For example, may communicate directly with network device 101, as terminal devices 105 and 106 in the figures may communicate directly with network device 101; or indirectly with the network device 101, as in the figure the terminal device 107 communicates with the network device 101 via the terminal device 105.

Each communication device in the communication system 100 shown in fig. 1 may be configured with multiple antennas. The plurality of antennas configured may include, for each communication device, at least one transmit antenna for transmitting signals and at least one receive antenna for receiving signals. Accordingly, communication can be performed by MIMO technology between the communication devices in the communication system 100.

It should be appreciated that fig. 1 is a simplified schematic diagram that is merely illustrative for ease of understanding, and that other network devices or other terminal devices may be included in the communication system 100, which are not shown in fig. 1.

In order to facilitate understanding of the embodiments of the present application, the following is a brief description of the terms and contexts referred to in this application.

1. Antenna port (antenna port)

The antenna ports are simply referred to as ports. It is understood as a transmitting antenna identified by the receiving end or a transmitting antenna that is spatially distinguishable. One antenna port may be configured for each virtual antenna, which may be a weighted combination of multiple physical antennas. The antenna ports may be divided into reference signal ports and data ports according to the difference of the carried signals. Among them, the reference signal ports may include, but are not limited to, DMRS ports, channel state information reference signal (channel state information reference signal, CSI-RS) ports, and the like.

The application comprises an existing port and a newly added port, wherein the existing port refers to a port in an existing protocol or a port supporting a technical scheme in the existing protocol; the newly added port refers to a port capable of supporting the technical scheme of the application.

2. Time-frequency resource

In the embodiment of the application, the data or information can be carried through time-frequency resources. The time-frequency resources may include resources in the time domain and resources in the frequency domain. Wherein, in the time domain, the time-frequency resource may include one or more time-domain units (may also be referred to as time units, etc.); in the frequency domain, the time-frequency resource may include one or more frequency domain units.

Wherein, a time domain unit may be one symbol or several symbols (such as OFDM symbols), or one slot (slot), or one mini-slot (mini-slot), or one subframe (subframe). Wherein, one slot may consist of 7 or 14 symbols; one mini-slot may include at least one symbol (e.g., 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols); the duration of one subframe in the time domain may be 1 millisecond (ms). It should be understood that the above-mentioned time domain unit sizes are merely for convenience of understanding the solution of the present application, and do not limit the protection scope of the present application, and it should be understood that the above-mentioned time domain unit sizes may be other values, which are not limited in the present application.

A frequency domain unit may be a Resource Block (RB), a subcarrier (subcarrier), a resource block group (resource block group, RBG), a predefined subband (subband), a pre-coded resource block group (precoding resource block group, PRG), a bandwidth part (BWP), a Resource Element (RE) (also referred to as a resource unit or resource element), or a carrier, or a serving cell.

3. Demodulation reference signal (demodulation reference signal, DMRS)

In a New Radio (NR) system, DMRS is used for equivalent channel matrix estimation of a data channel, e.g., a physical uplink shared channel (physical uplink share channel, PUSCH) or a control channel, e.g., a physical uplink shared channel (physical downlink control channel, PDCCH), for detection and demodulation of data on a corresponding channel.

Taking the data channel PDSCH as an example, the DMRS is usually precoded identically to the transmitted data signal, so as to ensure that the DMRS and the data signal experience the same equivalent channel. Assuming that the DMRS vector transmitted by the transmitting end is s, the transmitted data signal vector is x, and the DMRS and the data signal perform the same precoding (multiply by the same precoding matrix). The data signal vector y and the DMRS vector r received by the receiving end can be represented by formula (1) and formula (2), respectively:

Wherein,representing the equivalent channel experienced by the data signal and DMRS, n represents additive noise. The receiving end can obtain the equivalent channel +_ by using a channel estimation algorithm, such as Least Square (LS) channel estimation, minimum mean square error (minimum mean square error, MMSE) channel estimation, etc., based on the known DMRS vector s>Is a function of the estimate of (2). Demodulation of the data signal may be accomplished based on the equivalent channel.

With the introduction of the MIMO technology into a wireless communication system, a transmitting end may transmit multi-stream data on the same time-frequency resource, and a receiving end may recover all the data. At this time, the DMRS is used to estimate an equivalent channel matrix, and its dimension may be N _R X R, where N _R The number of receiving antennas is represented, and R represents the number of transport streams (also called the number of transport layers, the number of spatial layers). Typically, one DMRS port (port) corresponds to one transport stream, i.e., for MIMO transmission with a transport stream number R, the number of DMRS ports required is R. In order to ensure the quality of channel estimation, DMRS ports corresponding to multiple transmission streams are orthogonal ports.

For one DMRS port, in order to perform channel estimation for different time-frequency resources, multiple DMRS needs to be transmitted on multiple time-frequency resources. One DMRS sequence corresponds to a plurality of DMRS corresponding to one port. One DMRS sequence includes a plurality of DMRS sequence elements.

Taking the generation of DMRS sequences from gold sequences as an example, the DMRS sequence r _l The nth DMRS sequence element in (n) may be generated by:

wherein c (n) is a pseudo-random sequence, and c (n) may be a gold sequence with a sequence length of 31The method comprises the steps of carrying out a first treatment on the surface of the For an output length of M _PN Is a sequence c (n) of (a), n=0, 1, M _PN -1, which can be determined by formula (4):

wherein N is _C =1600, first m sequence x ₁ (n) can be initialized to x ₁ (0)＝1,x ₁ (n) =0, n=1, 2,..30, second m-sequence x ₂ (n) can be defined by parameter c _init Initializing, c _init Can be determined by equation (5):

wherein, l represents an index value of an OFDM symbol on one slot;the number of symbols contained in one slot;equal to the cell ID; lambda denotes a code division multiplexing (code division multiplexing, CDM) group (group) index corresponding to the DMRS port.

The DMRS sequence corresponding to one DMRS port can be mapped to the corresponding time-frequency resource through a preset time-frequency resource mapping rule. For the antenna port p (corresponding to the DMRS port p), the mth sequence element r (m) in the corresponding DMRS sequence may be mapped to the index (k, l) according to the mapping rule shown in the formula (6) _p,μ RE of (c):

wherein the index is (k, l) _p,μ The RE of (2) corresponds to an OFDM symbol with index l in one slot in the time domain and corresponds to a subcarrier with index k in the frequency domain. For mapping to index (k, l) _p,μ DMRS modulation symbol corresponding to DMRS port p on RE, +.>k′＝0,1；/>n=0, 1,; l' =0, 1; delta is a subcarrier offset factor; type1 and type2 respectively represent 2 DMRS configuration types (DMRSconfiguration type) defined in the current NR protocol; μ is the subcarrier spacing; />An index of a starting OFDM symbol or an index of a reference OFDM symbol occupied by the DMRS modulation symbol; />Is a power scaling factor; w (w) _f (k') is the frequency domain mask element, w, corresponding to the subcarrier with index k _t (l ') is a time domain mask element corresponding to an OFDM symbol with index l'; m=2n+k'.

In the configuration type1 mapping rule, w corresponding to the DMRS port p _f (k′)、w _t (l'), and the value of Δ, see Table 1 or section 6.4.1.1.3 of TS 38.211.

TABLE 1

In the configuration type2 mapping rule, w corresponding to DMRS port p _f (k′)、w _t (l'), and the value of Δ, can be determined from table 2.

TABLE 2

In tables 1 and 2, λ represents the index of CDM group, and the DMRS ports in the same CDM group occupy the same time-frequency resources.

4. DMRS configuration type

Fig. 2 shows DMRS patterns (pattern) of two configuration types. REs of different fill patterns in fig. 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 symbols within one slot and the numbers on the vertical axis represent the index of subcarriers within one RB.

It should be understood that the DMRS occupied symbol 0 and occupied symbols 0 and 1 in fig. 2 are only examples, and the symbol occupied by the DMRS in one slot may be other symbols, such as occupied symbol 1, or occupied symbols 1 and 2.

Referring to fig. 2 (a), for a single symbol DMRS of configuration type 1, a maximum of 4 orthogonal DMRS ports are supported. The 4 DMRS ports are divided into 2 CDM groups (CDM group0 and CDM group 1), each CDM group supporting a maximum of 2 orthogonal DMRS ports. Wherein CDM group0 includes DMRS ports P0 and P1, and CDM group 1 includes P2 and P3. Frequency division multiplexing (Frequency Division Multiplexing, FDM) between CDM groups (mapped on different frequency domain resources); DMRS ports included in CMD group are mapped on the same time domain resource (resource mapping is performed in a comb-tooth manner in the frequency domain). The reference signals corresponding to the DMRS ports contained in the CDM group are distinguished by an orthogonal cover code (orthogonal cover code, OCC), so that orthogonality of the DMRS ports in the CDM group is ensured.

Referring to fig. 2 (b), the dual-symbol DMRS of configuration type 1 supports a maximum of 8 orthogonal DMRS ports. The 8 DMRS ports belong to 2 CDM groups (CDM group0 and CDM group 1). Wherein CDM group0 comprises P0, P1, P4 and P5; CDM group 1 comprises P2, P3, P6 and P7. P0, P1, P4 and P5 are located in the same RE, and resource mapping is performed in a comb tooth mode in a frequency domain. Similarly, P2, P3, P6 and P7 are located in the same RE and mapped on the unoccupied subcarriers of P0, P1, P4 and P5 in a comb-tooth manner in the frequency domain. For one DMRS port, 2 adjacent subcarriers and 2 OFDM symbols occupied correspond to one OCC sequence of length 4 (can be derived with reference to table 1).

Fig. 2 (c) and (d) correspond to the time-frequency resource mapping manner of the single-symbol DMRS and the double-symbol DMRS of configuration type 2, respectively. As shown in fig. 2 (c), a single symbol DMRS of configuration type 2 supports a maximum of 6 orthogonal DMRS ports. The 6 DMRS ports belong to 3 CDM groups (CDM group 0, CDM group 1 and CDMgroup 2). As shown in fig. 2 (d), for a dual symbol DMRS of configuration type 2, a maximum of 12 orthogonal DMRS ports are supported. The 12 DMRS ports belong to 3 CDM groups (CDM group 0, CDM group 1 and CDMgroup 2). For brevity, the CDM group configuring the DMRS of type 2 and the time-frequency resource occupied by each DMRS port are omitted.

In each data transmission process, the network device needs to inform the terminal device of the allocated antenna port (DMRS port) and the configuration type of the DMRS. Therefore, the terminal equipment can receive the DMRS signal and perform channel estimation flow on the corresponding time-frequency resources according to the DMRS symbol generation method and the time-frequency resource mapping rule defined by the protocol based on the allocated antenna ports.

The manner in which the allocated DMRS port index is dynamically notified by higher layer signaling (e.g., radio resource control (radio resource control, RRC) signaling to semi-statically configure DMRS types, and downlink control information (downlink control information, DCI) is currently defined in the NR protocol:

(1) RRC signaling configuration DMRS configuration type and occupation symbol number

Illustratively, the network device configures a configuration Type of the DMRS through a higher layer signaling DMRS-DownlinkConfig, wherein a DMRS-Type field may be used to indicate whether the DMRS is Type 1 or Type 2 DMRS; the maxLength field may be used to indicate whether a single-symbol DMRS or a double-symbol DMRS is employed. If maxLength is configured to be len2, it is further indicated by DCI whether to use single-symbol DMRS or double-symbol DMRS; if the maxLength field is not configured, a single symbol DMRS is employed.

(2) DCI signaling

The DCI signaling includes an Antenna port field, which may be used to indicate an allocated DMRS port index. For the values of different DMRS-Type and maxLength configurations, the NR protocol defines various DMRS port calling modes. Tables 3 to 6 respectively show the configuration tables of DMRS-type=1, maxlength=1, DMRS-type=1, maxlength=2, DMRS-type=2, maxlength=1, DMRS-type=2, and maxlength=2 corresponding DMRS port calling modes. Wherein the Antenna port field indicates a column of "index values" in the table, each index value corresponding to one or more DMRS ports.

Table 3 (dmrs-type=1, maxLength=1)

Table 4 (dmrs-type=1, maxLength=2)

/>

Table 5 (dmrs-type=2, maxLength=1)

/>

Table 6 (dmrs-type=2, maxLength=2)

/>

That is, the terminal device may determine the following information through DCI signaling transmitted from the network device in combination with tables 3 to 6:

(1) Index of DMRS port

In tables 3 to 6, an "index value" can be obtained from a value indicated by the "Antenna port" field in DCI, and "DMRS port (ports)" can be obtained from the "index value". For example, if the terminal device obtains "Antenna port" =3 by parsing DCI in a certain slot, it can be known from the table look-up that DMRS port is 0, and PDSCH and DMRS indicated by the current DCI are transmitted in the Antenna port 1000.

(2) Number of symbols occupied by DMRS

The number of symbols occupied by a DMRS may be indicated by a "preamble symbol number" column in the table, for example, when the value of the "preamble symbol number" column is 1, it may indicate that the number of symbols occupied by a DMRS is 1, or that the DMRS is a single symbol DMRS; when the value of the "preamble symbol number" column is 2, it indicates that the number of symbols occupied by the DMRS is 2, or that the DMRS is a dual symbol DMRS.

(3) Number of CDM groups without data

The number of CDM groups without data may be indicated by the "number of DMRS code division multiplexing CDM groups without data" column in tables 3 to 6. According to different DMRS configuration types, the field may take three values of 1, 2 and 3.

Illustratively, when the value is 1, it may be indicated that the RE of the current CDM group 0 does not transmit data. For example, when the current time slot schedules a port belonging to CDM group 0, the REs of the current CDM group 0 do not transmit data, and REs which are not mapped to DMRS on symbols occupied by the currently scheduled DMRS may be scheduled to the data; when the value is 2, it may be indicated that REs of the current CDM group 0 and CDM group 1 do not transmit data; when the value is 3, it indicates REs of the current CDMgroup 0, CDM group 1, and CDM group 2, and no data is transmitted.

In the existing NR protocol, the network device and the terminal device may determine the power ratio β of the DMRS ports according to the "number of DMRS code division multiplexing CDM groups without transmitting data _DMRS 。β _DMRS The ratio of the energy of data (e.g., PDSCH) on each RE to the energy of DMRS on each RE may be represented. Alternatively stated, beta _DMRS The ratio of the energy on each RE carrying data to the energy on each RE carrying DMRS may be represented. Wherein the energy on the RE may also be replaced with power on the RE.

As shown in table 7, for DMRS of different configuration types, the protocol indicates "number of DMRS code division multiplexing CDM groups without transmitting data" and β _DMRS Corresponding relation of (3). For the DMRS configuration type supported by the current NR protocol, beta _DMRS The values of (1) can be 0, -3, -4.77dB, and the power of each RE carrying the DMRS is improved by 0dB, 3dB or 4.77dB respectively.

TABLE 7

The network device can be based on beta _DMRS Further determining a power scaling factor for the value of (2)As shown in equation (7):

referring to equation (6), the network device may be based onValue determination of +.>Alternatively, the network device is based onA DMRS sequence is generated.

With the development of the 5G multi-antenna technology, the number of transmission layers of the data stream increases, and the number of DMRS ports corresponding to the number of transmission layers also needs to increase, that is, DMRS ports supported by the current system need to be extended. The DMRS port expansion can be realized, for example, by a frequency division multiplexing mode, that is, the frequency domain resource of the existing DMRS port is multiplexed to the newly added DMRS port. Under the scheme of DMRS port expansion, if the power ratio beta of each DMRS port is indicated according to the mode defined in the NR protocol _DMRS The indication is not flexible enough.

For example, the density of time-frequency resources occupied by the newly added DMRS port and the existing DMRS port may be different, and the power ratio β of the DMRS ports occupying different time-frequency resource densities _DMRS May be different. For another example, for the case of simultaneous transmission of the newly added DMRS port and the existing DMRS port, the power ratio β of the existing DMRS port _DMRS Possibly different from that indicated in the NR protocol; second, the number of CDM groups corresponding to the extended DMRS ports (including the existing DMRS ports and the newly added DMRS ports) may be greater than 3. The current protocol does not support the power ratio of the DMRS port in the above case.

In view of this, the present application provides a method for transmitting and receiving reference signals, which can improve the power of the reference signals of each reference signal port and improve the utilization rate of the reference signal transmitting power by flexibly indicating the power ratio of each reference signal port.

Before introducing the solution of the present application, the following description is made:

(1) The symbol (symbol) in this application refers to an OFDM symbol.

(2) For convenience of description, "x" among "symbols x" hereinafter means an index of a symbol within one schedule time unit. That is, "symbol x" represents a symbol with index x within one scheduling time unit. For example, the symbol 0 represents a symbol with an index of 0 in one schedule time unit.

Similarly, "x" in "DMRS Port (Port) x" represents an index of a DMRS Port (or DMRS Port number), i.e., "DMRS Port x" represents a DMRS Port with index x. For example, DMRS port 0 represents a DMRS port with index 0.

The index of the symbol and the index of the DMRS port may start from 0 or 1, or from another number, which is not limited in this application. For ease of understanding and description, in this application, the index of the symbol and the index of the DMRS port are described as starting from 0.

(3) The resource block RB referred to in this application may refer to 12 subcarriers consecutive in the frequency domain. The resource element RE refers to 1 subcarrier in the frequency domain and one symbol in the time domain.

In the embodiment of the present application, for convenience of distinction and explanation, the RE for carrying the reference signal is referred to as the reference signal RE, and it is understood that the reference signal RE does not necessarily carry the reference signal at every port. For a reference signal of a certain port, the occupied RE may be determined according to a reference signal pattern (pattern). Correspondingly, the REs used to carry data are denoted as data REs, it being understood that the data REs and reference signal REs may be frequency division multiplexed (frequency division multiplexing, FDM) or time division multiplexed (time division multiplexing, TDM).

(4) The density of time-frequency resources occupied by the reference signal mentioned in the embodiments of the present application may refer to the density of time-frequency resources (e.g., REs) carrying the reference signal in one time-frequency resource group (e.g., resource element group (resource element group, REG)). Alternatively, the "density" may refer to the proportion of the time-frequency resources used to carry the reference signal in one time-frequency resource group to the time-frequency resources in one time-frequency resource group.

For example, let the density of the time-frequency resources occupied by the reference signal be ρ, ρ=b/P.

Wherein B represents the number of REs carrying reference signals (the number of REs occupied by reference signals) within one REG, and P represents the number of total REs included in the REG, or P represents the number of REs carrying data corresponding to reference signals (the number of REs occupied by data corresponding to reference signals).

It should be understood that the specific units of time-frequency resources listed above are merely exemplary and the present application is not limited thereto. For example, B may 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, or P represents the number of subcarriers carrying the data corresponding to the reference signal (the number of subcarriers occupied by the data corresponding to the reference signal).

For example, referring to fig. 4 (b), the number of REs carrying the reference signal of the P0 port is 6, and the total number of REs in the REG is 12, and the density of time-frequency resources occupied by the reference signal of the P0 port is 6/12=1/2; the number of REs carrying the reference signal of the P8 port is 3, and the density of time-frequency resources occupied by the reference signal of the P8 port is 3/12=1/4. For brevity, the description of the same or similar cases is omitted below.

(5) The comb degree of the time-frequency resource occupied by the reference signal mentioned in the embodiment of the present application may be related to the density of the time-frequency resource occupied by the reference signal. For example, referring to fig. 4 (b), if the density of the time-frequency resource occupied by the reference signal of the P0 port is 1/2, the Comb degree of the time-frequency resource occupied by the reference signal of the P0 port is 2, and the P0 port may be referred to as a port with a Comb degree of 2 (which may be denoted as Comb-2); the density of the time-frequency resource occupied by the reference signal of the P8 port is 1/4, and then the Comb degree of the time-frequency resource occupied by the reference signal of the P8 port is 4, and the P8 port may be referred to as a port with the Comb degree of 4 (which may be referred to as Comb-4).

(6) The case of lending the transmission power of the idle port to the active port for use in the embodiment of the present application is described in units of time-frequency resources. Specifically, it is described in terms of RE. An idle port may be understood as not carrying a signal on an RE occupied by the port, and an active port may be understood as carrying a signal (e.g., including a reference signal, a data signal, etc.) on an RE occupied by the port. The borrowing of the transmission power of the idle port to the active port may be understood as compensating (or stealing) the transmission power configured in advance for a certain RE (e.g., denoted as RE # 0) that does not carry a signal on a certain port to a RE (e.g., RE # 1) that carries a reference signal on another port, so as to achieve the effect of improving the transmission power of the reference signal on the RE # 1. Hereinafter, for the sake of brevity, the description of the same or similar cases will be omitted.

The method for transmitting and receiving the reference signal according to the embodiments of the present application will be described in detail below with reference to the accompanying drawings by taking the reference signal as an example. It should be appreciated that 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 any one of a plurality of terminal devices communicatively connected to the network device, for example, any one of the terminal devices 102 to 107 in fig. 1.

It should be noted that, in the embodiment of the present application, the reference signal is taken as an example of DMRS, and the technical solution of the embodiment of the present application is described, which should not constitute any limitation to the present application. The reference signal in this application may be any reference signal that may be used as a channel estimate, such as a cell-specific reference signal, CRS, or other reference signals that may be used to perform the same or similar functions. In future communication systems, the name of the reference signal may change, but the technical solution of the present application should be applied as long as it is essentially indistinguishable from DMRS.

Fig. 3 is a schematic flow chart of a method 300 of transmitting and receiving reference signals provided in an embodiment of the present application. The method 300 may include the following steps.

S310, the network device determines a power ratio β.

The power ratio beta is the power ratio corresponding to the reference signal port currently scheduled. The network device may determine a reference signal for the currently scheduled reference signal port based on the power ratio β.

The power ratio β is associated with a configuration type of the reference signal, a number of first code division multiplexing CDM groups, and a first parameter. Or, in case that the configuration type of the reference signal is determined, the power ratio β has a first correspondence with the number of the first CDM groups and the first parameter.

Wherein the currently scheduled reference signal port belongs to the first port set. The first port set includes M reference signal ports, which may be reference signal ports that the system can support at most. The M reference signal ports correspond to N CDM groups, each of the N CDM groups corresponding to at least one reference signal port. The at least one reference signal port multiplexes the same time-frequency resources, such as REs, by code division. The time-frequency resources occupied by at least one reference signal port corresponding to different CDM groups do not overlap, or, the same time-frequency resources are multiplexed between N CDM groups by frequency division, and M, N is an integer greater than or equal to 2.

It should be understood that port sets are merely introduced in this application for convenience in describing the relationship between reference signal ports that occupy different time-frequency resources. In practical implementation, there may be no concept of aggregation, but the characteristics of reference signal ports corresponding to different CDM groups, for example, occupied time-frequency resources, may refer to the description of the characteristics of reference signal ports in the port aggregation in the present application. The above description of the first port set may also be understood as a description of a reference signal configuration type or reference signal pattern. The first port set corresponds to a reference signal configuration type or a reference signal pattern.

It will be appreciated that the values of N and/or M corresponding to different reference signal configuration types are different. In the embodiments of the present application, the values of N, M may include the following cases, for example.

Case one: the value of N can be 3 or 4, and the value corresponding to M can be 6 or 8 respectively, or the value corresponding to M is 12 or 16 respectively;

and a second case: the value of N may also be 4, 5 or 6, corresponding to the value of M being 8, 10 or 12, respectively, or corresponding to the value of M being 16, 20 or 24, respectively.

Wherein case one may correspond to a case of reference signal port expansion supported for the existing reference signal configuration type 1 (refer to (a) and (b) of fig. 2); case two may correspond to the case of reference signal port expansion supported for the existing reference signal configuration type 2 (refer to (c) and (d) of fig. 2).

For example, reference signal patterns corresponding to reference signal configuration types referred to in the present application may refer to any one of fig. 4 to 7 and the related description.

Further, in an embodiment of the present application, the currently scheduled reference signal port may include at least one of the reference signal ports supported by the first reference signal configuration type. The first reference signal configuration type includes N ₁ CDM group, N ₁ Is an integer greater than or equal to 2. The at least one port may include a first port corresponding to the N ₁ One of the CDM groups, the reference signal of the first port occupies a time-frequency resource with a density of 1/4 or 1/6.

Optionally, the at least one port may further include a second port corresponding to the N ₁ One of the CDM groups, the CDM group corresponding to the second port being different from the CDM group corresponding to the first port. Or, the time-frequency resource occupied by the second port is not coincident with the time-frequency resource occupied by the first port (the time-frequency resource occupied by the second port is frequency division multiplexed with the time-frequency resource 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.

At N ₁ Under the condition that the densities of the time-frequency resources occupied by the reference signals of the first port are different values, the densities of the time-frequency resources occupied by the second port can comprise four conditions.

Case one: n (N) ₁ The value of (2) may be 3, 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 1/2.

And a second case: n (N) ₁ The value of (1) may 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 first reference signal configuration type does not include the second port, or in other words, the densities of time-frequency resources occupied by the reference signal of the reference signal ports supported by the first reference type configuration type are the same.

And a third case: n (N) ₁ The density of the time-frequency resource occupied by the reference signal of the first port is 1/6, and the density of the time-frequency resource occupied by the reference signal of the second port is 1/3.

Case four: the value of N may also be 5 or 6, the density of the time-frequency resource occupied by the reference signal of the first port is 1/6, and the density of the time-frequency resource occupied by the reference signal of the second port is 1/3 or 0, respectively.

In the case that the reference signal configuration type of the currently scheduled reference signal port is determined, for example, the reference signal configuration type of the currently scheduled reference signal port is the first reference signal configuration type, and the first CDM group may be a CDM group that does not transmit data among N CDM groups of the reference signal configuration type. Illustratively, 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 a time-frequency resource occupied by a reference signal. The first parameter may include at least one of:

index of antenna port associated with reference signal, index of time-frequency resource occupied by reference signal, and density of time-frequency resource occupied by reference signal. The index of the time-frequency resource occupied by the reference signal is, for example, the index of the subcarrier occupied by the reference signal.

In case that the power ratio β of the reference signal port is associated with the configuration type of the reference signal, the number of the first code division multiplexing CDM groups and the first parameter, the network device may determine the power ratio β by determining the configuration type of the currently scheduled reference signal, the number of the first CDM groups and the first parameter.

In particular, the network device may determine the configuration type of the currently scheduled reference signal according to the number of data streams currently transmitted, and the specific process of determining the configuration type of the reference signal by the network device may refer to the existing related description. The network device may determine, according to a currently scheduled reference signal port, a number of CDM groups that do not transmit data from among N CDM groups, where the currently scheduled reference signal port corresponds to a reference signal configuration type, and the N CDM groups are CDM groups corresponding to reference signal ports supported by the reference signal configuration type. There is a second correspondence between the currently scheduled reference signal port and the number of CDM groups that do not transmit data.

It should be understood that the second correspondence may be preconfigured in the network device, and the second correspondence may be shown in tables 16 to 21, for example.

The network device may directly or indirectly determine the first parameter. For example, the network device may directly determine the index of the antenna port associated with the currently scheduled reference signal port. For another example, the network device may determine the index of the time-frequency resource of the reference signal by determining the index of the antenna port of the currently scheduled reference signal port, referring to the foregoing formula (6). As another example, the network device may determine the density of the reference signal time-frequency resources by determining an index of the reference signal time-frequency resources.

By associating the power ratio of the reference signal port with the first parameter, the configuration type of the reference signal, and the number of the first CDM groups, the power ratio of the reference signal port may be indicated more flexibly (for example, the power ratio of the reference signal ports with different densities of occupied time-frequency resources may be indicated), thereby improving the transmission power of the transmitted reference signal.

Alternatively, the power ratio may be further associated with the value of N, that is, the power ratio is associated with the total number of CDM groups in the first port set, or, in other words, the total number of CDM groups included in the current reference signal configuration type.

It will be appreciated that in the case of an extension to a reference signal port, it may correspond to an existing reference signal configuration type or to a newly added reference signal configuration type for one reference signal port. The newly added reference signal configuration type may be understood as a reference signal configuration type including the newly added reference signal port. When the reference signal ports belong to different reference signal configuration types, the power that they can boost may be different, i.e., the power ratio may be different, corresponding to the same first parameter, the first CDM group number. To more flexibly indicate the power ratio of the reference signal port, the power ratio may be associated with the value of N.

And S320, the network equipment sends a reference signal to the terminal equipment based on the power ratio beta. Accordingly, the terminal device receives the reference signal from the network device.

In particular, the network device may determine a power scaling factor based on the power ratio βAnd determining the reference signal based on the power scaling factor. Wherein the power ratio β and the power scaling factor satisfy the following relationship:

the network device may map the reference signal to a corresponding time-frequency resource according to a time-frequency resource mapping rule, and send the reference signal to the terminal device through the time-frequency resource. For example, in case that the reference signal configuration type is an existing reference signal configuration type, the time-frequency resource mapping rule may refer to the above formula (6) and formula (7). In case that the reference signal configuration type is the newly added reference signal configuration type, the time-frequency resource mapping rule may refer to formulas (8) to (11).

And S330, the network equipment sends indication information to the terminal equipment. Accordingly, the terminal device receives the indication information from the network device.

The indication information is used to indicate a configuration type of the reference signal and an index of an antenna port to which the reference signal is associated.

Specifically, step S330 may include the network device sending first indication information to the terminal device, where the first indication information indicates a configuration type of the reference signal.

The first indication information may be carried in a radio resource control, RRC, message, for example. The reference signal configuration type may be an existing reference signal configuration type or a newly added reference signal configuration type.

Step S330 may further include the network device sending second indication information to the terminal device, the second indication information indicating an index of an antenna port associated with the reference signal.

For example, 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 reference signal which is currently scheduled.

Through S330, the terminal device may determine the configuration type of the reference signal and the index (an example of the first parameter) of the antenna port associated with the reference signal, so that the first CDM group number may be determined according to the second correspondence. Further, the terminal device may determine a power ratio β of the currently scheduled reference signal port according to the first CDM group number, the first parameter, and the first correspondence.

It may be appreciated that the terminal device may pre-configure the first correspondence and the second correspondence. Under the condition that the first parameter in the first corresponding relation is 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, the terminal equipment can determine 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 according to the index of the antenna port associated with the reference signal, and then determine the power ratio beta according to the first corresponding relation.

Optionally, S340, the terminal device determines the reference signal based on the power ratio.

Illustratively, the terminal device may determine a power scaling factor based on the power ratio βAnd based on the power scaling factor->The reference signal is determined, and the description of the reference signal may be determined with reference to the network device in S320.

The corresponding relationship between the power ratio β and the number of the first parameter and the first CDM group in S310 is described in detail below by taking the reference signal as the DMRS as an example, and combining different DMRS configuration types. It should be understood that in fig. 4 to 7 referred to below, numerals on the horizontal axis denote indexes of symbols in one slot, and numerals on the vertical axis denote indexes of subcarriers in one RB.

The DMRS patterns shown in fig. 4 and 5 may be DMRS patterns obtained by expanding ports supported by DMRS configuration type 1. The DMRS pattern shown in fig. 4 may be a DMRS pattern obtained by expanding ports supported by a single symbol DMRS configuration type 1 (e.g., fig. 4 (a)). The DMRS pattern shown in fig. 5 may be a DMRS pattern obtained by expanding ports supported by the dual-symbol DMRS configuration type 1 (e.g., fig. 5 (a)).

The DMRS patterns shown in fig. 6 and 7 may be DMRS patterns obtained by expanding ports supported by DMRS configuration type 2. The DMRS pattern shown in fig. 6 may be a DMRS pattern obtained by expanding ports supported by single symbol DMRS configuration type 2 (e.g., fig. 6 (a)). The DMRS pattern shown in fig. 7 may be a DMRS pattern obtained by expanding ports supported by the dual-symbol DMRS configuration type 2 (e.g., fig. 7 (a)).

As shown in fig. 4 (b) and fig. 4 (c), DMRS patterns corresponding to two newly added DMRS configuration types (for simplicity, referred to as DMRS configuration type 1a and DMRS configuration type 1b, respectively) are shown.

Specifically, CDM group 0 and/or CDM group 1 in the single-symbol DMRS configuration type 1 may be sparsely designed to obtain the DMRS configuration type 1a and the DMRS configuration type 1b.

As shown in fig. 4 (b), the DMRS configuration type 1a is obtained by sparsifying CDM group1 in single symbol DMRS configuration type 1. The sparse design for CDM group1 is specifically: and multiplexing the partial subcarrier frequency occupied by CDM group1 by two newly added DMRS ports (for example, ports P10 and P11), wherein the time-frequency resource where the CDM group 0 corresponds to the DMRS port is not changed. It can also be said that the time-frequency resources of CDM group1 are divided into two groups (e.g., CDM group2 and CDM group 3). Wherein CDM group2 corresponds to newly added ports P10 and P11. Since the time-frequency resources of the original CDM group1 are divided into two groups, the time-frequency resources corresponding to the original ports P2 and P3 are changed, and in order to flexibly indicate the positions of the time-frequency resources corresponding to the DMRS port indexes, the original port indexes P2 and P3 can be updated to P8 and P9. P8 and P9 correspond to CDM group3, and P8 and P9 may also be referred to as added ports.

In the case where the DMRS configuration type is DMRS configuration type 1a, the DMRS pattern supports a maximum of 6 DMRS ports (P0, P1, P8 to P11). The 6 DMRS ports correspond to 3 CDM groups (CDM group 0, CDM group2, CDM group 3).

That is, when the DMRS configuration type is DMRS configuration type 1a, the value of the total number N of CDM groups is 3 and the value of m is 6. The density of the time-frequency resources occupied by the DMRS of the DMRS port (comprising the first port) corresponding to the CDM group2 or CDM group3 is 1/4; the DMRS of the DMRS port (including the second port) corresponding to CDM group 0 occupies 1/2 of the time-frequency resource.

In one example, the first correspondence corresponding to DMRS configuration type 1a is illustrated with one DMRS port (DMRS port # 1) currently scheduled. The DMRS port #1 may configure any one of DMRS ports supported by type 1a for DMRS.

In case that the value of N is 3, the number of CDM groups in which no data is transmitted in the DMRS configuration type 1a may be 1, 2, or 3.

Corresponding to the same number of CDM groups which do not send data in the DMRS configuration type 1a, when the DMRS port #1 is a DMRS port with different occupied time-frequency resource densities, the power ratio is different. The determination of the power ratio includes two cases.

Case one: DMRS port #1 is P0 or P1

That is, DMRS port #1 is an existing port, or, DMRS port #1 is a port (Comb-2 port) occupying 1/2 of the time-frequency resource density. For convenience of description, DMRS port #1 is hereinafter described as P0. DMRS port #1 is P1 similarly to the case where DMRS port #1 is P0.

When the number of CDM groups in which data is not transmitted in the DMRS configuration type 1a is 1, DMRS reference signals are carried on REs corresponding to the CDM group 0, and data (e.g., PDSCH) corresponding to the DMRS port #1 is carried on REs corresponding to the CDM group 2 and the CDM group 3. At this time, there is no RE capable of "borrowing" power, i.e., the power of each RE carrying DMRS is the same as the power of each RE carrying PUSCH, i.e., the power ratio is 0.

When the number of CDM groups in which data is not sent in the DMRS configuration type 1a is 2, DMRS reference signals are carried on REs corresponding to the CDM group 0, no signals are carried on REs corresponding to one CDM group of the CDM group 2 and the CDM group 3, and data corresponding to the DMRS port #1 is carried on REs corresponding to the other CDM group. At this time, the power of the REs that do not carry signals may be "borrowed" to the REs carrying DMRS. Since the number of borrowable REs (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 the REs carrying the DMRS may be increased by 1.5 times as much as the original power, i.e., the power of each RE carrying the DMRS is 1.5 times as much as the power of each RE carrying the PUSCH. I.e. the power ratio is-10 log10 (1.5), i.e. -1.76dB.

When the number of CDM groups in which data is not sent in the DMRS configuration type 1a is 3, DMRS reference signals are carried on REs corresponding to the CDM group 0, and signals are not carried on REs corresponding to the CDM group 2 and the CDM group 3. At this time, the number of borrowable REs (REs corresponding to CDM group 2 and CDM group 3) is 1 time as large as the number of REs corresponding to DMRS port #1, and thus, the power of REs carrying DMRS can be increased to 2 times as large as the original power. I.e. the power of each RE carrying DMRS is 2 times the power of each RE carrying PUSCH, the power ratio is-10 log10 (2), i.e. -3dB.

And a second case: DMRS port #1 is P8, P9, P10 or P11

That is, DMRS port #1 is a newly added port, or, DMRS port #1 is a port (comb4 port) occupying 1/4 of the time-frequency resource density. For convenience of description, DMRS port #1 is hereinafter described as P8. DMRS port #1 is P9, P10, or P11 similarly to the case where DMRS port #1 is P8.

When the number of CDM groups in which data is not transmitted in the DMRS configuration type 1a is 1, DMRS reference signals are carried on REs corresponding to the CDM group 3, and data (e.g., PDSCH) corresponding to the DMRS port #1 is carried on REs corresponding to the CDM group 0 and the CDM group 2. At this time, the power ratio is 0.

When the number of CDM groups in which data is not sent in the DMRS configuration type 1a is 2, DMRS reference signals are carried on REs corresponding to the CDM group 3, no signals are carried on REs corresponding to one CDM group of the CDM group 0 and the CDM group2, and data corresponding to the DMRS port #1 is carried on REs corresponding to the other CDM group. At this time, the power of the REs that do not carry signals may be "borrowed" to the REs carrying DMRS. The number of borrowable REs (REs corresponding to CDM group 0 or CDM group 2) is at least 1 time as large as the number of REs corresponding to DMRS port #1, so that the power of REs carrying DMRS can be at least increased by at least 2 times as large as the original power, i.e., the power of each RE carrying DMRS is at least 2 times as large as the power of each RE carrying PUSCH. I.e. the power ratio is-10 log10 (2), i.e. -3dB.

Similarly, when the number of CDM groups in which no data is transmitted in the DMRS configuration type 1a is 3, the power of each RE carrying DMRS is 3 times that of each RE carrying PUSCH, i.e., the power ratio is-10×log10 (3), i.e., -4.77dB.

Alternatively, in the case where the DMRS port currently scheduled is a newly added port, the total number of CDM groups may be 4 for terminal devices supporting the newly added port. When the number of CDM groups in the DMRS configuration type 1a which does not send data is N ₂ When the power of RE carrying DMRS can be increased to the original N ₂ Multiple, i.e. power ratio of-10 log10 (N ₂ )。

As shown in fig. 4 (c), the DMRS configuration type 1b is obtained by sparsifying CDM group 0 and CDM group 1 in the single symbol DMRS configuration type 1. Specifically, the two DMRS ports (e.g., P10 and P11) that are newly added are multiplexed with the partial subcarrier frequency occupied by CDM group 1 in DMRS configuration type 1, and the two DMRS ports (e.g., P14 and P15) that are newly added are multiplexed with the partial subcarrier frequency occupied by CDM group 0. The time-frequency resources of CDM group 0 and CDM group 1 can be said to be divided into two groups. Dividing the time-frequency resources of CDM group 0 into two groups (e.g., CDM group 4 and CDM group 5); the time-frequency resources of CDM group 1 are divided into two groups (e.g., CDM group 2 and CDM group 3). After sparse design is performed on CDM group 0 and CDM group 1 in single-symbol DMRS configuration type 1, CDM group 4 corresponds to newly added ports P12 and P13, and CDM group 3 corresponds to newly added ports P8 and P9; CDM group 5 corresponds to newly added ports P14 and P15, and CDM group 2 corresponds to newly added ports P10 and P11.

In the case where the DMRS configuration type is DMRS configuration type 1b, the DMRS pattern supports at most 8 DMRS ports (P8 to P15), and the 8 DMRS ports correspond to 4 CDM groups. That is, the total number of CDM groups N is 4 and m is 8.

The first correspondence relationship corresponding to the DMRS configuration type 1b is described below by taking one DMRS port (DMRS port # 1) currently scheduled as an example, which is any one of the DMRS ports supported by the DMRS configuration type 1 b.

Since the DMRS ports supported by the DMRS configuration type 1b are all newly added ports, when the number of CDM groups in the DMRS configuration type 1b that do not send data is N ₂ When the power of RE carrying DMRS can be increased to the original N ₂ Multiple, i.e. power ratio of-10 log10 (N ₂ )。

In case that the value of N is 4, the number of CDM groups in which no data is transmitted in the DMRS configuration type 1b may be 1, 2, 3, or 4. I.e. N ₂ The value of (2), 3 or 4.

When N is ₁ When=1, the power ratio is 0.

When N is ₁ For a power ratio of 2, 3 or 4, the corresponding power ratio is-10 x log10 (2), -10 x log10 (3) or-10 x log10 (4), i.e., -3dB, -4.77dB or-6 dB, respectively.

As shown in fig. 5 (b) and 5 (c), DMRS patterns corresponding to two newly added DMRS configuration types (DMRS configuration type 1c and DMRS configuration type 1d, respectively) are shown.

The DMRS configuration type 1c and the DMRS configuration type 1d may be DMRS configuration types obtained by expanding ports supported by the dual-symbol DMRS configuration type 1. Specifically, CDM group 0 and/or CDM group 1 in the dual-symbol DMRS configuration type 1 may be sparsely designed to obtain the DMRS configuration type 1c and the DMRS configuration type 1d.

As shown in fig. 5 (b), the DMRS configuration type 1c is obtained by sparsifying CDM group 1 in the dual symbol DMRS configuration type 1. As shown in fig. 5 (c), the DMRS configuration type 1d is obtained by sparsifying CDM group 0 and CDM group 1 in the two-symbol DMRS configuration type 1. The sparse design for CDM group 0 and/or CDM group 1 is similar to the sparse design for CDM group 0 and/or CDM group 1 in fig. 4, and will not be described again.

In the case that the DMRS configuration type is DMRS configuration type 1c, the DMRS pattern supports a maximum of 12 DMRS ports (P0, P1, P4, P5, P8-P15). The 12 DMRS ports correspond to 3 CDM groups (CDM group 0, CDM group 3, and CDM group 2). That is, the total number of CDM groups N is 3 and m is 12.

In the case where the DMRS configuration type is DMRS configuration type 1d, the DMRS pattern supports a maximum of 16 DMRS ports (P8 to P23). The 16 DMRS ports correspond to 4 CDM groups (CDM group 2 to CDM group 5). That is, the total number of CDM groups N is 4 and m is 16.

In the case where the DMRS configuration type is the DMRS configuration type 1c or 1d, the number of CDM groups that do not transmit data may be 1, 2, 3, or 4. The first correspondence relationship is similar to the case that the DMRS configuration type is DMRS configuration type 1a or 1b, and will not be described again.

In summary, when the DMRS configuration type of the scheduled DMRS port is any one of the DMRS configuration types 1a to 1d, the first correspondence may be as shown in table 8.

TABLE 8

Where "/" indicates an arbitrary value, or, information of the column is not considered.

In this embodiment of the present application, in order to distinguish between an existing port and a newly added port, the index of the newly added port may be set to be "x" or more. Where x may be the maximum value of the index of the existing port plus n. Illustratively, the value of n may be 1. For example, when the existing port configures a port supported by type 1 for DMRS, the value of x may be 8. Thus, the existing ports (ports supported by the existing DMRS configuration type 1) and the newly added ports can be distinguished by the size relation between the index of the DMRS port and "8". I.e., the "antenna port" column may be indicated as a size relationship to "8". The value of n may also be greater than 1, which is not limited in this application.

It should be understood that the "antenna port" may also indicate an index of a particular antenna port, e.g., the "antenna port" column indicates "8,9, 10 …".

Optionally, the "antenna port" may also indicate an index of time-frequency resources occupied by the DMRS (e.g., an index of subcarriers) or a density of time-frequency resources occupied by the DMRS (e.g., 1/2,1/4, or 1/6). In the case that the "antenna port" indicates an index of time-frequency resources occupied by the DMRS or a density of time-frequency resources occupied by the DMRS, the network device or the terminal device may determine information of the time-frequency resources occupied by the DMRS port, for example, an index of time-frequency resources, a density of time-frequency resources, through the index of the DMRS port.

It is understood that for DMRS port P0 or P1, it may belong to existing DMRS configuration type 1, or may belong to DMRS configuration type 1a or DMRS configuration type 1c. To accommodate the above two possible scenarios, the power ratio of the reference signal port may be more flexibly indicated, which may be associated with the total number of CDM groups in the DMRS configuration type. The first correspondence relationship applicable to DMRS configuration type 1, DMRS configuration type 1a to DMRS configuration type 1d may be shown in table 9 below.

TABLE 9

According to the scheme of the embodiment of the application, the DMRS port is added, meanwhile, the existing terminal equipment (Rel.15 terminal or terminal equipment supporting the existing port) can be compatible, and the terminal equipment provided by the application and the terminal equipment only supporting the existing standard capability can be subjected to multi-user pairing, so that the existing terminal equipment does not need to be updated in any hardware and software. The compatibility with the existing terminal device means that when multi-user pairing is performed, the existing terminal device and the new terminal device (rel.18 terminal, or terminal device supporting a new port) can be scheduled to transmit together on the same time-frequency resource.

Further, when the scheduled DMRS port is the port supported by the DMRS configuration type 1 and the DMRS configuration type 1a to the DMRS configuration type 1d, it is assumed that the DMRS configuration type 1 and the time-frequency resources corresponding to the other ports supported by the DMRS configuration type 1a to the DMRS configuration type 1d are all used for carrying the DMRS, or that is, it is assumed that the other ports are all occupied. In this case, the first correspondence is as shown in table 10.

Table 10

In table 10, when the scheduled DMRS port is DMRS configuration type 1, the DMRS configuration type 1a to the ports supported by DMRS configuration type 1d, and the number of CDM groups that do not transmit data is 1, there are no REs that can "borrow" power, i.e., the power of each RE carrying DMRS is the same as the power of each RE carrying PUSCH, and the power ratio is 0.

When the number of CDM groups without data is 2, the scheduled DMRS ports are ports supported by the DMRS configuration type 1, and the DMRS reference signals are borne on REs corresponding to CDM group 0 and CDM group 1 in the DMRS configuration type 1. At this time, the scheduled DMRS port may be a CDM group 0 or CDM group 1 corresponding port. Therefore, the power of the RE carrying the DMRS can be increased by 2 times, i.e., the power ratio is-10×log10 (2), i.e., -3dB.

When the number of CDM groups that do not send data is 3, the scheduled DMRS port is a port supported by DMRS configuration type 1a or 1c, and the scheduled DMRS port may be an existing port or a newly added port, where DMRS reference signals are carried on REs corresponding to CDM group 0, cdmgroup 2, and CDM group 3 in the DMRS configuration type. In the case that the scheduled port is an existing port, the power of the RE carrying the DMRS can be increased by 2 times as much as the original one, that is, the power ratio is-10×log10 (2), that is, -3dB; in the case that the scheduled port is a newly added port, the power of the RE carrying the DMRS may be increased by 4 times, i.e., the power ratio is-10×log10 (4), i.e., -6dB.

When the number of CDM groups without data is 4, the scheduled DMRS ports are ports supported by the DMRS configuration type 1b or 1d, the scheduled DMRS ports are newly added ports, and the DMRS reference signals are borne on REs corresponding to CDM groups 2 to 5 in the DMRS configuration type. In the case that the scheduled port is a newly added port, the power of the RE carrying the DMRS may be increased by 4 times, i.e., the power ratio is-10×log10 (4), i.e., -6dB.

In another example, the first correspondence relationship corresponding to the DMRS configuration type 1a to the DMRS configuration type 1d is illustrated by taking a plurality of DMRS ports currently scheduled as an example.

Case one, for DMRS configuration type 1a or DMRS configuration type 1c, assume that the power on each subcarrier is E:

(1) When the number of CDM groups without data is 2:

the power of the DMRS on each RE can be expressed as:

wherein n is ₁ Represents the number of DMRS ports (existing ports) with the density of occupying time-frequency resources of 1/2 in the DMRS configuration type, n ₂ The number of DMRS ports (newly added ports) occupying 1/4 of the time-frequency resource in the DMRS configuration type is indicated.

Taking (b) of fig. 4 as an example, REs with subcarrier indexes of 0, 1, 2, 4, 5, 6, 8, 9, and 10 may be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 9E. In the 9E, 2/3 of the DMRS is used for bearing the DMRS port with the occupied time-frequency resource density of 1/2, and 1/3 of the DMRS is used for bearing the DMRS of the DMRS port with the occupied time-frequency resource density of 1/4, so that the power P of the DMRS on each RE _DMRS Can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE may be expressed as:

thus, for DMRS ports supported by DMRS configuration type 1a or 1c, its corresponding power ratio β can be expressed as:

from the above expression of the power ratio β, it can be seen that the power ratio of the DMRS port currently being scheduled is equal to n ₁ 、n ₂ Is related to the value of (a). Thus, the network device can determine the number of DMRS ports with density of 1/2 and/or density of 1/4 according to the currently scheduled occupied time-frequency resource, namely n ₁ 、n ₂ And determining the power ratio of each scheduled DMRS port.

For example, when the currently scheduled ports include DMRS port P0 and DMRS port P8, and the number of CDM groups in the DMRS configuration type 1a that do not transmit data is 2, the power ratio of each scheduled DMRS port is-10×log10[3×1+1/2×1+1) ]= -3dB.

(2) When the number of CDM groups without data is 3:

the power of the DMRS on each RE can be expressed as:

wherein n is ₁ Represents the number of DMRS ports (existing ports) with the density of occupying time-frequency resources of 1/2 in the DMRS configuration type, n ₂ Representing the number of DMRS ports (newly added ports) occupying 1/4 of the time-frequency resource in the DMRS configuration type

Taking (b) of fig. 4 as an example, REs with subcarrier indexes 0 to 11 may be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 12E. 1/2 of the 12E is used for bearing the DMRS of the DMRS port with the 1/2 of the occupied time-frequency resource density, and 1/2 of the 12E is used for bearing the DMRS of the DMRS port with the 1/4 of the occupied time-frequency resource density, so that the power P of the DMRS on each RE _DMRS Can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE may be expressed as:

the network device may determine that the power ratio of each scheduled DMRS port is-3 dB according to the above equation.

Case two, for DMRS configuration type 1b or DMRS configuration type 1d, assume that the power on each subcarrier is E:

when the number of CDM groups without data is k:

the power of the DMRS on each RE can be expressed as:

wherein n is ₂ The number of DMRS ports (newly added ports) with the density of 1/4 of the time-frequency resources occupied in the DMRS configuration type is represented.

The power of data (e.g., PDSCH) on each RE may be expressed as:

thus, for DMRS ports supported by DMRS configuration type 1b or 1d, its corresponding power ratio β can be expressed as:

from the above expression of the power ratio β, it can be seen that the power ratio of the DMRS port currently being scheduled is related to the value of k. Thus, the network device may determine the power ratio of each scheduled DMRS port according to k number of CDM groups that do not transmit data in the current DMRS configuration type.

In summary, when the DMRS configuration type of the scheduled DMRS port is any one of the DMRS configuration types 1a to 1d, the first correspondence may be as shown in table 11.

TABLE 11

Number of CDM groups without data	n ₁	n ₂	β(dB)
				2	1	1	-3.01
2	1	2	-3.52
				2	1	3	-3.80
2	1	4	-3.98
				2	2	1	-2.55
2	2	2	-3.01
				2	2	3	-3.31
2	2	4	-3.52
				3	1	1	-3.00
3	1	2	-3.00
				3	1	3	-3.00
3	1	4	-3.00
				3	2	1	-3.00
3	2	2	-3.00
				3	2	3	-3.00
3	2	4	-3.00
				1	0	-	0
2	0	-	-3
				3	0	-	-4.77
4	0	-	-6

As shown in fig. 6 (b) to 6 (d), DMRS patterns corresponding to three newly added DMRS configuration types (for simplicity, DMRS configuration type 2a, DMRS configuration type 2b, and DMRS configuration type 2c are respectively denoted).

Specifically, one CDM group from CDM group 0 to CDM group 2 in the single-symbol DMRS configuration type 2 may be sparsely designed to obtain the DMRS configuration type 2a; performing sparse design on any two CDM groups from CDM group 0 to CDM group 2 in the single-symbol DMRS configuration type 2 to obtain the DMRS configuration type 2b; and carrying out sparse design on CDM group 0 to CDM group 2 in the single-symbol DMRS configuration type 2 to obtain the DMRS configuration type 2c. Wherein, the sparse design of CDM group can be described with reference to fig. 4.

As shown in fig. 6 (b), in the case where the DMRS configuration type is DMRS configuration type 2a, the DMRS pattern supports at most 8 DMRS ports (P0 to P3, P12 to P15), and the 8 DMRS ports correspond to 4 CDM groups (CDM group 0, CDM group 1, CDM group 3, CDM group 4). That is, the total number of CDM groups N is 4 and m is 8. And the density of time-frequency resources occupied by the DMRS of the DMRS port corresponding to CDM group 0 or CDM group 1 is 1/3, and the density of time-frequency resources occupied by the DMRS of the DMRS port corresponding to CDM group 3 or CDM group 4 is 1/6.

In one example, the first correspondence corresponding to DMRS configuration type 2a is illustrated with one DMRS port (DMRS port # 1) currently scheduled. The DMRS port #1 may configure any one of DMRS ports supported by type 2a for DMRS.

In case that the value of N is 4, the number of CDM groups in which no data is transmitted in the DMRS configuration type a may be 1, 2, 3, or 4. Corresponding to the same number of CDM groups which do not send data in the DMRS configuration type 2a, when the DMRS port #1 is a DMRS port with different occupied time-frequency resource densities, the power ratio is different.

Case one: DMRS port #1 is P0, P1, P2 or P3

That is, DMRS port #1 is an existing port, or, DMRS port #1 is a port occupying 1/3 of the time-frequency resource density. For convenience of description, DMRS port #1 is hereinafter described as P0. DMRS port #1 is P1, P2, or P3 similarly to the case where DMRS port #1 is P0.

When the number of CDM groups in which data is not transmitted in the DMRS configuration type 2a is 1, DMRS reference signals are carried on REs corresponding to the CDM group 0, and data (e.g., PDSCH) corresponding to the DMRS port #1 are carried on REs corresponding to the CDM group1, CDM group3 and CDM group 4. At this time, the power ratio is 0.

When the number of CDM groups in which data is not sent in the DMRS configuration type 2a is 2, DMRS reference signals are carried on REs corresponding to the CDM group 0, no signals are carried on REs corresponding to the CDM group1, and REs corresponding to the CDM group3 and the CDM group4 carry data corresponding to the DMRS port # 1. At this time, the power of the RE carrying the DMRS may be increased by 2 times, i.e., the power ratio is-10×log10 (2), i.e., -3dB.

When the number of CDM groups in which data is not sent in the DMRS configuration type 2a is 3, DMRS reference signals are carried on REs corresponding to the CDM group 0, no signals may be carried on REs corresponding to the CDM group 1 and the CDM group 3, and data corresponding to the DMRS port #1 is carried on REs corresponding to the CDM group 4. At this time, the power of the RE carrying the DMRS may be increased by 2.5 times, i.e., the power ratio is-10×log10 (2.5), i.e., -3.98dB.

When the number of CDM groups in which data is not sent in the DMRS configuration type 2a is 4, DMRS reference signals are carried on REs corresponding to the CDM group 0, and signals may not be carried on REs corresponding to the CDM group 1, the CDM group 3, and the CDM group 4. At this time, the power of the RE carrying the DMRS may be increased by 3 times, i.e., the power ratio is-10×log10 (3), i.e., -4.77dB.

And a second case: DMRS port #1 is P12, P13, P14 or P15

Namely, DMRS port #1 is a newly added port, or, DMRS port #1 is a port occupying 1/6 of the time-frequency resource density. For convenience of description, DMRS port #1 is hereinafter described as P12. DMRS port #1 is P13, P14, or P15 similarly to the case where DMRS port #1 is P12.

When the number of CDM groups in which data is not transmitted in the DMRS configuration type 2a is 1, the power ratio is 0.

When the number of CDM groups in which data is not sent in the DMRS configuration type 2a is 2, DMRS reference signals are carried on REs corresponding to the CDM group 3, and signals may not be carried on at least one of REs corresponding to the CDM group0, the CDM group 1, and the CDM group 4. At this time, the number of available REs is 1 times that of REs corresponding to the DMRS port 2, i.e., the power ratio is-10 log10 (2), i.e., -3dB.

When the number of CDM groups in which data is not sent in the DMRS configuration type 2a is 3, DMRS reference signals are carried on REs corresponding to the CDM group 3, and signals may not be carried on at least two REs in REs corresponding to the CDM group0, the CDM group 1, and the CDM group 4. At this time, the number of available REs is 2 times that of REs corresponding to the DMRS port #1, i.e. the power ratio is-10 log10 (3), i.e. -4.77dB.

When the number of CDM groups in which data is not sent in the DMRS configuration type 2a is 4, DMRS reference signals are carried on REs corresponding to the CDM group 3, and signals may not be carried on at least 3 REs in REs corresponding to the CDM group0, the CDM group 1, and the CDM group 4. At this time, the number of available REs is 4 times that of the corresponding REs of DMRS port #1, i.e., the power ratio is-10×log10 (4), i.e., -6dB.

In summary, when DMRS port #1 is a newly added port, the number of CDM groups in DMRS configuration type 2a that do not transmit data is N ₂ The corresponding power ratio is-10 log10 (N ₂ )，N ₂ >1。

Alternatively, in the case where the DMRS port currently scheduled is a newly added port, the total number of CDM groups may be 6 for terminal devices supporting the newly added port. When the number of CDM groups in the DMRS configuration type 2a, which does not transmit data, is N ₂ When the power of RE carrying DMRS can be increased to the original N ₂ Multiple, i.e. power ratio of-10 log10 (N ₂ )，N ₂ >1。

As shown in fig. 6 (c), in case that the DMRS configuration type is DMRS configuration type 2b, the DMRS pattern supports at most 10 DMRS ports (P0, P1, P12 to P19). The 10 DMRS ports correspond to 5 CDM groups (CDM group 0, CDM group 3 to CDM group 6). That is, the total number of CDM groups N is 5 and m is 10. And, the density of the time-frequency resource occupied by the DMRS of the DMRS port corresponding to CDM group 0 is 1/3, and the density of the time-frequency resource occupied by the DMRS of the DMRS port corresponding to any one of CDM group 3 to CDM group 6 is 1/6.

The first correspondence relationship corresponding to the DMRS configuration type 2b is described below by taking one DMRS port (DMRS port # 1) currently scheduled as any one of the DMRS ports supported by the DMRS configuration type 2b as an example.

In case that the value of N is 5, the number of CDM groups in which no data is transmitted in the DMRS configuration type 2b may be any one of 1 to 5.

Case one: DMRS port #1 is P0 or P1, and a description will be given below taking DMRS port #1 as P0 as an example.

When the number of CDM groups in which data is not transmitted in the DMRS configuration type 2b is 1, the power ratio is 0.

When the number of CDM groups in which data is not sent in the DMRS configuration type 2b is 2, DMRS reference signals are carried on REs corresponding to the CDM group 0, no signals are carried on REs corresponding to any one of the CDM groups 3 to 6, and data corresponding to the DMRS port #1 are carried on REs corresponding to the remaining CDM groups. At this time, the power of each RE carrying the DMRS is 1.5 times the power of each RE carrying the PUSCH. I.e. the power ratio is-10 log10 (1.5), i.e. -1.76dB.

Similarly, when the number of CDM groups that do not send data in the DMRS configuration type 2b is 3, no signal is carried on REs corresponding to any two CDM groups of the CDM groups 3 to 6. At this time, the power of each RE carrying the DMRS is 2 times that of each RE carrying the PUSCH. I.e. the power ratio is-10 log10 (2), i.e. -3dB.

When the number of CDM groups in the DMRS configuration type 2b, which does not send data, is 4, the power of each RE carrying DMRS is 2.5 times that of each RE carrying PUSCH, i.e., the power ratio is-10×log10 (2.5), i.e., -3.98dB.

When the number of CDM groups in the DMRS configuration type 2b, which does not send data, is 5, the power of each RE carrying the DMRS is 3 times that of each RE carrying the PUSCH, i.e., the power ratio is-10×log10 (3), i.e., -4.77dB.

And a second case: DMRS port #1 is any one of P12 to P19

When the number of CDM groups in the DMRS configuration type 2b, which does not transmit data, is N ₂ When the power ratio is-10 log10 (N ₂ ). Corresponding to N ₁ The power ratio is-3 dB, -4.77dB, -6dB or-6.99 dB, respectively, for 2,3,4 or 5.

As shown in fig. 6 (d), in case that the DMRS configuration type is DMRS configuration type 2c, the DMRS pattern supports at most 12 DMRS ports (P12 to P23), and the 12 DMRS ports correspond to 6 CDM groups (CDMgroup 3 to CDM group 8). That is, the total number of CDM groups N is 6 and m is 12.

Since the DMRS ports supported by the DMRS configuration type 2c are all newly added ports, when the number of CDM groups in the DMRS configuration type 2c that do not send data is N ₂ When the power of RE carrying DMRS can be increased to the original N ₂ Multiple, i.e. power ratio of-10 log10 (N ₂ )。

In the case where the value of N is 6, N ₂ The value of (2) may be any one of 1 to 6.

When N is ₂ When the value of (2) is 1, the power ratio is 0.

When N is ₂ When the value of (2), 3, 4, 5 or 6 is chosen, the power ratio is-3 dB, -4.77dB, -6dB, -6.99dB or-7.78 dB respectively.

As shown in fig. 7 (b) to 7 (d), DMRS patterns corresponding to the three newly added DMRS configuration types are respectively denoted as DMRS configuration type 2d, DMRS configuration type 2e, and DMRS configuration type 2f.

Specifically, one CDM group from CDM group 0 to CDM group 2 in the dual-symbol DMRS configuration type 2 may be sparsely designed to obtain the DMRS configuration type 2d; performing sparse design on any two CDM groups from CDM group 0 to CDM group 2 in the double-symbol DMRS configuration type 2 to obtain the DMRS configuration type 2e; and carrying out sparse design on CDM group 0 to CDM group 2 in the double-symbol DMRS configuration type 2 to obtain the DMRS configuration type 2f. Wherein, the sparse design of CDM group can be described with reference to fig. 4.

As shown in fig. 7 (b), in case that the DMRS configuration type is DMRS configuration type 2d, the DMRS pattern supports at most 16 DMRS ports (P0-P3, P6-P8, and P12-P19). The 16 DMRS ports correspond to 4 CDM groups (CDM group 0,CDM group 1,CDM group 3, CDM group 4). Namely, the value of N is 4, and the value of M is 16. The DMRS configuration type 2a may be referred to by the density of time-frequency resources occupied by DMRS of the DMRS ports corresponding to CDM group.

Similarly, as shown in fig. 7 (c), in case that the DMRS configuration type is DMRS configuration type 2e, the DMRS pattern supports a maximum of 20 DMRS ports. The 20 DMRS ports correspond to 5 CDM groups. That is, the total number of CDM groups N is 5 and m is 20.

As shown in (d) of fig. 7, in case that the DMRS configuration type is DMRS configuration type 2f, the DMRS pattern supports at most 24 DMRS ports. The 24 DMRS ports correspond to 6 CDM groups. That is, the total number of CDM groups N is 6 and m is 24.

In the case where the DMRS configuration type is the DMRS configuration types 2d to 2f, the number of CDM groups that do not transmit data may be any one of 1 to 6. The first correspondence relationship and the DMRS configuration type are similar to the DMRS configuration types 2a to 2c, and will not be described again.

In summary, when the scheduled DMRS port belongs to DMRS configuration type 2, any one of DMRS configuration types 2a to 2f, the first correspondence is as shown in table 12.

Table 12

Further, when the scheduled DMRS port is a DMRS configuration type 2, and the DMRS configuration type 2a to the ports supported by the DMRS configuration type 2f, it is assumed that the DMRS configuration type 2, and time-frequency resources corresponding to other ports supported by the DMRS configuration type 2a to the DMRS configuration type 2f are all used for carrying the DMRS, or that is, it is assumed that all other ports are occupied. In this case, the first correspondence is as shown in table 13.

TABLE 13

In this embodiment of the present application, in order to distinguish between an existing port and a newly added port, the index of the newly added port may be set to be "x" or more. Where x may be the maximum value of the index of the existing port plus n. Illustratively, the value of n may be 1, for example, when an existing port is a port supported by DMRS configuration type 2, the value of x may be 12. Thus, the existing port (the port supported by the existing DMRS configuration type 2) and the newly added port can be distinguished by the size relation between the index of the DMRS port and "12". I.e., the "antenna port" column may be indicated as a size relationship to "12". The value of n may also be greater than 1, which is not limited in this application.

It should be understood that "antenna port" may also indicate an index of a particular antenna port, e.g., the "antenna port" column is indicated as "12, 13, …".

Optionally, the "antenna port" may also indicate an index of time-frequency resources occupied by the DMRS (e.g., an index of subcarriers) or a density of time-frequency resources occupied by the DMRS (e.g., 1/2,1/4, or 1/6).

In table 13, when the scheduled DMRS port is DMRS configuration type 2, the DMRS configuration type 2a to the ports supported by the DMRS configuration type 2f, and the number of CDM groups that do not transmit data is 1, there are no REs that can "borrow" power, that is, the power of each RE carrying the DMRS is the same as the power of each RE carrying the PUSCH, and the power ratio is 0.

When the number of CDM groups without data is 2, the scheduled DMRS ports are ports supported by the DMRS configuration type 2, and the DMRS reference signals are borne on REs corresponding to CDM group 0 and CDM group 1 in the DMRS configuration type 2. At this time, the scheduled DMRS port may be a CDM group 0 or CDM group 1 corresponding port. Therefore, the power of the RE carrying the DMRS can be increased by 2 times, i.e., the power ratio is-10×log10 (2), i.e., -3dB.

When the number of CDM groups without data is 3, the scheduled DMRS ports are ports supported by the DMRS configuration type 2, and the DMRS reference signals are borne on REs corresponding to CDM groups 0 to 2 in the DMRS configuration type 2. At this time, the scheduled DMRS port may be a CDM group 0, CDM group 1, or CDM group 2-corresponding port. Therefore, the power of the RE carrying the DMRS can be increased by 3 times, i.e., the power ratio is-10×log10 (3), i.e., -4.77dB.

When the number of CDM groups that do not send data is 4, the scheduled DMRS port is a port supported by DMRS configuration type 2a or 2d, and the scheduled DMRS port may be an existing port or a newly added port, where DMRS reference signals are carried on REs corresponding to CDM group 0,CDMgroup 1,CDMgroup 3 and CDM group 4 in the DMRS configuration type. In the case that the scheduled port is an existing port, the power of the RE carrying the DMRS can be increased by 3 times as much as the original one, that is, the power ratio is-10×log10 (3), that is, -4.77dB; in the case that the scheduled port is a newly added port, the power of the RE carrying the DMRS may be increased by 6 times, i.e., the power ratio is-10×log10 (6), i.e., -7.78dB.

When the number of CDM groups that do not send data is 5, the scheduled DMRS port is a port supported by DMRS configuration type 2b or 2e, and the scheduled DMRS port may be an existing port or a newly added port, where DMRS reference signals are carried on REs corresponding to CDM group 0, cdmgroup 3 to CDM group 6 in the DMRS configuration type. In the case that the scheduled port is an existing port, the power of the RE carrying the DMRS can be increased by 3 times as much as the original one, that is, the power ratio is-10×log10 (3), that is, -4.77dB; in the case that the scheduled port is a newly added port, the power of the RE carrying the DMRS may be increased by 6 times, i.e., the power ratio is-10×log10 (6), i.e., -7.78dB.

When the number of CDM groups without data is 6, the scheduled DMRS ports are ports supported by the DMRS configuration type 2c or 2f, the scheduled DMRS ports are newly added ports, and the DMRS reference signals are borne on REs corresponding to CDM groups 3 to 8 in the DMRS configuration type. Under the condition that the scheduled port is the newly added port, the power of RE carrying the DMRS can be improved to 6 times of the original power, namely-7.78 dB.

In another example, the first correspondence relationship corresponding to the DMRS configuration type 2a to the DMRS configuration type 2f is described by taking a plurality of DMRS ports currently scheduled as an example.

Case one, for DMRS configuration type 2a or DMRS configuration type 2d, assume that the power on each subcarrier is E:

(1) When the number of CDM groups without data is 3:

the power of the DMRS on each RE can be expressed as:/>

wherein n is ₁ The number of DMRS ports (existing ports) occupying 1/3 of the time-frequency resource in the DMRS configuration type is represented. n is n ₂ The number of DMRS ports (newly added ports) with the density of 1/6 of the time-frequency resources occupied in the DMRS configuration type is represented.

Taking fig. 6 (b) as an example, REs with subcarrier indexes of 0, 1, 2, 3, 4, 6, 7, 8, 9, and 10 may be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 10E. In the 10E, 4/5 of the DMRS is used for bearing the DMRS port with the occupied time-frequency resource density of 1/3, and 1/5 of the DMRS is used for bearing the DMRS of the DMRS port with the occupied time-frequency resource density of 1/6, so that the power P of the DMRS on each RE _DMRS Can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE may be expressed as:

thus, for DMRS ports supported by DMRS configuration type 2a or 2d, its corresponding power ratio β can be expressed as:

from the above expression of the power ratio β, it can be seen that the power ratio of the DMRS port currently being scheduled is equal to n ₁ 、n ₂ Is related to the value of (a). Thus, the network device can determine the number of DMRS ports with density of 1/3 and/or density of 1/6 according to the currently scheduled occupied time-frequency resource, namely n ₁ 、n ₂ And determining the power ratio of each scheduled DMRS port.

For example, when the currently scheduled ports include DMRS port P0 and DMRS port P12 and the number of CDM groups in the DMRS configuration type 2a that do not transmit data is 3, the power ratio of each scheduled DMRS port is-10×log10[5×1+1/4×1+1) ]= -3dB.

(2) When the number of CDM groups without data is 4:

the power of the DMRS on each RE can be expressed as:

Taking (b) of fig. 6 as an example, REs having subcarrier indexes of 0 to 11 may be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 12E. 2/3 of the 12E is used for bearing the DMRS of the DMRS port with the density of 1/3 of the occupied time-frequency resource, and 1/3 of the 12E is used for bearing the DMRS of the DMRS port with the density of 1/6 of the occupied time-frequency resource, so that the power P of the DMRS on each RE _DMRS Can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE may be expressed as:

thus, for DMRS ports supported by DMRS configuration type 2a or DMRS configuration type 2d, the corresponding power ratio β may be expressed as:

the network device may determine the power ratio of each scheduled DMRS port according to the above equation.

Case two, for DMRS configuration type 2b or DMRS configuration type 2E, assume that the power on each subcarrier is E:

(1) When the number of CDM groups without data is 2:

the power of the DMRS on each RE can be expressed as:

wherein n is ₁ The number of DMRS ports (existing ports) occupying 1/3 of the time-frequency resource in the DMRS configuration type is represented. n is n ₂ The number of DMRS ports (newly added ports) occupying 1/6 of the time-frequency resource in the DMRS configuration type is indicated.

Taking fig. 6 (c) as an example, REs with subcarrier indexes of 0, 1, 2, 6, 7, and 8 may be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 6E. 2/3 of the 9E is used for bearing the DMRS of the DMRS port with the 1/3 of the occupied time-frequency resource density, and 1/3 of the 9E is used for bearing the DMRS of the DMRS port with the 1/6 of the occupied time-frequency resource density, so that the power P of the DMRS on each RE _DMRS Can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE may be expressed as:

thus, for DMRS ports supported by DMRS configuration type 2b or 2e, its corresponding power ratio β can be expressed as:

from the above workThe expression of the ratio β can be seen that the ratio of the power of the DMRS port currently scheduled to n ₁ 、n ₂ Is related to the value of (a). Thus, the network device can determine the number of DMRS ports with the density of 1/3 and/or the density of 1/6 according to the currently scheduled occupied time-frequency resource, namely n ₁ 、n ₂ And determining the power ratio of each scheduled DMRS port.

For example, when the currently scheduled ports include DMRS port P0 and DMRS port P16, and the number of CDM groups in the DMRS configuration type 2b that do not transmit data is 2, the power ratio of each scheduled DMRS port is-10×log10[3×1+1/2×1+1) ]= -3dB.

(2) When the number of CDM groups without data is 3:

the power of the DMRS on each RE can be expressed as:

Taking fig. 6 (c) as an example, REs with subcarrier indexes of 0, 1, 2, 3, 6, 7, 8, and 9 may be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 8E. 1/2 of the 12E is used for bearing the DMRS of the DMRS port with the density of 1/3 of the occupied time-frequency resource, and 1/2 of the 12E is used for bearing the DMRS of the DMRS port with the density of 1/6 of the occupied time-frequency resource, so that the power P of the DMRS on each RE _DMRS Can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE may be expressed as:

(3) When the number of CDM groups without data is 4:

the power of the DMRS on each RE can be expressed as:/>

Taking fig. 6 (c) as an example, REs with subcarrier indexes of 0, 1, 2, 3, 4, 6, 7, 8, 9, and 10 may be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 10E. In the 10E, 2/5 of the DMRS is used for bearing the DMRS port with the occupied time-frequency resource density of 1/3, and 3/5 of the DMRS is used for bearing the DMRS of the DMRS port with the occupied time-frequency resource density of 1/6, so that the power P of the DMRS on each RE _DMRS Can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE may be expressed as:

from the above expression of the power ratio β, it can be seen that the power ratio of the DMRS port currently being scheduled is equal to n ₁ 、n ₂ Is related to the value of (a). Thus, the network device can occupy the time frequency according to the current scheduleThe number of DMRS ports with a density of 1/3 and/or a density of 1/6 of the resources, i.e. n ₁ 、n ₂ And determining the power ratio of each scheduled DMRS port.

For example, the currently scheduled ports include DMRS port P0 and DMRS port P16, and when the number of CDM groups in which no data is transmitted in the DMRS configuration type 2b is 2, the power ratio of each scheduled DMRS port is-10 log ₁₀ [5(1+1)/(2+3)]＝-3dB。

(4) When the number of CDM groups without data is 5:

the power of the DMRS on each RE can be expressed as:

Taking (c) of fig. 6 as an example, REs with subcarrier indexes 0 to 11 may 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 for bearing the DMRS of the DMRS port with the 1/3 of the occupied time-frequency resource density, and 2/3 of the 12E is used for bearing the DMRS of the DMRS port with the 1/6 of the occupied time-frequency resource density, so that the power P of the DMRS on each RE _DMRS Can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE may be expressed as:

thus, for DMRS ports supported by DMRS configuration type 2b or DMRS configuration type 2e, the corresponding power ratio β may be expressed as:

Case three, for DMRS configuration type 2c or DMRS configuration type 2f, assume that the power on each subcarrier is E:

when the number of CDM groups without data is k:

the power of the DMRS on each RE can be expressed as:

wherein n is ₂ Representing the number of DMRS ports (newly added ports) with a density of 1/6 of occupied time-frequency resources in the currently scheduled DMRS configuration type 2c or 2 f.

The power of data (e.g., PDSCH) on each RE may be expressed as:

thus, for DMRS ports supported by DMRS configuration type 2c or 2f, its corresponding power ratio β can be expressed as:

In summary, when the DMRS configuration type of the scheduled DMRS port is any one of the DMRS configuration types 2a to 2f, the first correspondence may be as shown in table 14.

TABLE 14

/>

Wherein, in the CDM group number of the non-data, n ₁ N is as follows ₂ And under the condition that the value of beta is determined to be not the only value, the network equipment or the terminal equipment can determine the value of beta according to the DMRS configuration type. For example, when the CDM group number of the data is 4, n ₁ Is 1 and n ₂ If the configuration type of the DMRS is 2a or 2d, the value of beta is-3.52 dB; if the configuration type of the DMRS is 2b or 2e, the value of beta is-0.27 dB.

Table 14 is only one example of the first correspondence relationship. In an actual configuration, the first correspondence may also be a sub-table of table 14, i.e. the first correspondence may comprise part of the rows of table 14.

In yet another example, the first correspondence relationship corresponding to the DMRS configuration types 2a to 2f is described with respect to a new terminal device (rel.18 terminal, or a terminal device supporting a new port) by using a plurality of DMRS ports currently scheduled as the DMRS configuration type.

Let the power on each subcarrier be E:

(1) When the number of CDM groups without data is 3:

The power of the DMRS on each RE can be expressed as:

wherein n is ₁ Represents the number of DMRS ports (existing ports) with the density of occupying time-frequency resources of 1/3 in the DMRS configuration type, n ₂ The number of DMRS ports (newly added ports) occupying 1/6 of the time-frequency resource in the DMRS configuration type is indicated.

Taking (c) of fig. 6 as an example, REs with subcarrier indexes of 0, 1, 2, 6, 7, 8 may be used to carry DMRS, that is, the total of subcarriers used to carry DMRSThe power is 6E. 2/3 of the DMRS in the 6E is used for bearing the DMRS of the DMRS port with the occupied time-frequency resource density of 1/3, and 1/3 of the DMRS is used for bearing the DMRS of the DMRS port with the occupied time-frequency resource density of 1/6, so that the power P of the DMRS on each RE _DMRS Can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE may be expressed as:

therefore, when the number of CDM groups that do not transmit data is 3, the power ratio β may be expressed as:

from the above expression of the power ratio β, it can be seen that the power ratio of the DMRS port currently being scheduled is equal to n ₁ 、n ₂ Is related to the value of (a). Thus, the network device can determine the number of DMRS ports with the density of 1/3 and/or the density of 1/6 according to the currently scheduled occupied time-frequency resource, namely n ₁ 、n ₂ And determining the power ratio of each scheduled DMRS port.

For example, the currently scheduled ports include DMRS port P0 and DMRS port P12, and when the number of CDM groups transmitting no data is 3, the power ratio of each scheduled DMRS port is-10 log ₁₀ [3(1+1)/(2+1)]＝-3.01dB。

(2) When the number of CDM groups without data is 4:

the power of the DMRS on each RE can be expressed as:

Take (c) of FIG. 6 as an example, whereinREs with subcarrier indexes 0, 1, 2, 3, 6, 7, 8, 9 may be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 8E. 1/2 of the DMRS in the 6E is used for bearing the DMRS of the DMRS port with the occupied time-frequency resource density of 1/3, and 1/2 of the DMRS is used for bearing the DMRS of the DMRS port with the occupied time-frequency resource density of 1/6, so that the power P of the DMRS on each RE _DMRS Can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE may be expressed as:

therefore, when the number of CDM groups that do not transmit data is 4, the power ratio β may be expressed as:

(3) When the number of CDM groups without data is 5:

in one case, the power of the DMRS on each RE can be expressed as:

The power of data (e.g., PDSCH) on each RE may be expressed as:

therefore, in this case, when the number of CDM groups that do not transmit data is 5, the power ratio β may be expressed as:

in another case, the power of the DMRS on each RE can be expressed as:

The power of data (e.g., PDSCH) on each RE may be expressed as:

(4) When the number of CDM groups without data is 6:

in one case, the power of the DMRS on each RE can be expressed as:

Taking (c) of fig. 6 as an example, REs with subcarrier indexes of 0-11 may be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 12E. In the 10E, 1/3 is used for bearing the DMRS of the DMRS port with the time-frequency resource density of 1/3, and 2/3 is used for bearing the DMRS of the DMRS port with the time-frequency resource density of 1/6. Thus, the power P of DMRS on each RE _DMRS Can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE may be expressed as:

in another case, the power of the DMRS on each RE can be expressed as:

Taking (b) of fig. 6 as an example, REs with subcarrier indexes of 0-11 may be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 12E. In the 12E, 2/3 of the DMRS is used for bearing the DMRS port with the occupied time-frequency resource density of 1/3, and 1/3 of the DMRS is used for bearing the DMRS of the DMRS port with the occupied time-frequency resource density of 1/6, so that the power P of the DMRS on each RE _DMRS Can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE may be expressed as:

therefore, in this case, when the number of CDM groups that do not transmit data is 6, the power ratio β may be expressed as:

from the above expression of the power ratio β, it can be seen that the power ratio of the DMRS port currently being scheduled is equal to n ₁ 、n ₂ Is related to the value of (a). Thus, the network device can determine the number of DMRS ports with 1/3 and/or 1/6 of the occupied time-frequency resource according to the current schedule, namely n ₁ 、n ₂ And determining the power ratio of each scheduled DMRS port.

In yet another example, for the case where the densities of time-frequency resources occupied by DMRS ports corresponding to different CDM groups are the same in DMRS configuration type 1E (including DMRS configuration types 1a to 1 d) and DMRS configuration type 2E (including DMRS configuration types 2a to 2 f) (e.g., DMRS configuration type 1b, DMRS configuration type 2 c), the first correspondence may be as shown in table 15.

TABLE 15

Number of CDM groups without data	DMRS configuration type 1E	DMRS configuration type 2E
			1	0dB	0dB
2	-3dB	-3dB
			3	-4.77dB	-4.77dB
4	-6dB	-6dB
			5	-	-6.99dB
6	-	-7.78dB

It should be understood that the DMRS patterns shown in fig. 4 to 7 are only examples and should not constitute any limitation to the present application.

In summary, under the condition that the DMRS ports currently supported by the protocol are extended, the scheme provided by the embodiment of the application can flexibly indicate the power ratio of each DMRS port, so that the transmitting power of the transmitted reference signal is improved.

As can be seen from the above, in the case that the DMRS configuration type corresponding to the scheduled DMRS port is any one of the configuration types of fig. 4 to 7, the network device may determine the power ratio of the scheduled DMRS port according to the first correspondence relationship shown in tables 8 to 15.

The number of the first CDM groups is the "number of CDM groups without data" shown in tables 8 to 15. There is a second correspondence between the number of the first CDM groups and the DMRS ports being scheduled. The second correspondence may be as shown in tables 16 to 21 in conjunction with the DMRS configuration types shown in fig. 4 to 7.

Table 16 (configuration type 1E (including DMRS configuration types 1a and 1 b), maxlength=1

/>

Table 17 (configuration type 1E (including DMRS configuration types 1a and 1 b), maxlength=1

Table 18 (configuration type 1E (including configuration types 1c and 1 d), maxlength=2)

/>

Table 19 (configuration type 2E (including configuration types 2a to 2 c), maxlength=1)

/>

Table 20 (configuration type 2E (including configuration types 2a to 2 c), maxlength=1)

/>

Table 21 (configuration type 2E (including configuration types 2d to 2 f), maxlength=2)

/>

In table 16, when the DMRS port index value is 0 to 3, it indicates an existing port, and when the DMRS port index value is 4 to 11, it indicates a newly added port; in table 17, when the DMRS port index value is 0 to 3, it indicates an existing port, and when the DMRS port index value is 8 to 15, it indicates a newly added port; in table 18, when the DMRS port index value is 0 to 7, it indicates an existing port, and when the DMRS port index value is 8 to 23, it indicates a newly added port; in table 19, when the DMRS port index value is 0 to 5, it indicates an existing port, and when the DMRS port index value is 6 to 17, it indicates a newly added port; in table 20, when the DMRS port index value is 0 to 5, it indicates an existing port, and when the DMRS port index value is 12 to 23, it indicates a newly added port; in table 21, when the DMRS port index value is 0 to 11, it indicates an existing port, and when the DMRS port index value is 12 to 35, it indicates a newly added port; it should be understood that the above tables 16 to 21 are examples only and should not be construed as limiting the present application in any way.

After the network device determines the power ratio of the scheduled DMRS port according to the first correspondence shown in tables 8 to 15, the network device may further map the reference signal onto the corresponding time-frequency resource according to the time-frequency resource mapping rule (refer to S320). The time-frequency resource mapping rule is described in detail below in connection with the DMRS configuration types shown in fig. 4 to 7.

In a possible implementation manner, the reference signal port p corresponds to a reference signal sequenceReference signal sequence->Elements mapped on kth subcarrier and the ith symbol +.>The following relationship is satisfied:

k′＝0,1

c＝1,2

n＝0,1,...

l′＝0,1

wherein,is a power scaling factor; w (w) _f (k') is the frequency domain mask element, w, corresponding to the subcarrier with index k _t (l ') is a time domain mask element corresponding to an OFDM symbol with index l'; c represents the capacity expansion coefficient, and the specific value is shown in any one of tables 22 to 25, and r (2n+k') is the element of the base sequence mapped on the kth subcarrier and the ith symbol.

In another possible implementation, the reference signal port p corresponds to a reference signal sequenceReference signal sequence->Elements mapped on kth subcarrier and the ith symbol +.>The following relationship is satisfied:

k′＝0,1

c＝1,2

n＝0,1,...

l′＝0,1

wherein,is a power scaling factor; w (w) _f (k') is the frequency domain mask element, w, corresponding to the subcarrier with index k _t (l ') is a time domain mask element corresponding to an OFDM symbol with index l'; c represents the capacity expansion coefficient, the specific value is shown in any one of tables 22 to 25, and r (n) is the element of the base sequence mapped on the kth subcarrier and the ith symbol.

In tables 22 to 25, p=1000+ port index values. Table 22 corresponds to a pattern obtained by single symbol spreading for configuration type 1; table 23 corresponds to a pattern obtained by two-symbol spreading for configuration type 1; table 24 corresponds to a pattern obtained for configuration type 2 single symbol spreading; table 25 corresponds to the pattern obtained for the configuration type 2 two-symbol spread.

Table 22

In table 22, when the port index value is 0 to 3, the corresponding DMRS port is the existing port, and when the port index value is 4 to 11, the corresponding DMRS port is the newly added port. The index value of the newly added port of the DMRS is not limited in this application, for example, the port index value of the newly added port may be 8-15. I.e., the antenna port P index values 1004 to 1011 in table 22 may be replaced with 1008 to 1015 in sequence.

Table 23

/>

In table 23, when the port index value is 0 to 7, the corresponding DMRS port is the existing port, and when the port index value is 8 to 23, the corresponding DMRS port is the newly added port. The index value of the DMRS newly added port is not limited in the present application.

Table 24

In table 24, when the port index value is 0 to 5, the corresponding DMRS port is the existing port, and when the port index value is 6 to 17, the corresponding DMRS port is the newly added port. The index value of the newly added port of the DMRS is not limited in this application, for example, the port index value of the newly added port may be 12 to 23. I.e. the antenna port P index values 1006 to 1017 in table 22 are replaced with 1012 to 1023 in sequence.

Table 25

In table 25, when the port index value is 0 to 11, the corresponding DMRS port is the existing port, and when the port index value is 12 to 35, the corresponding DMRS port is the newly added port. The index value of the DMRS newly added port is not limited in the present application.

k′＝0,1

n＝0,1,...

l′＝0,1

wherein,is a power scaling factor; w (w) _f (k') is the frequency domain mask element, w, corresponding to the subcarrier with index k _t (l ') is a time domain mask element corresponding to the OFDM symbol with index of l', and specific values are shown in tables 26 to 29; r (2n+k') is an element of the base sequence mapped on the kth subcarrier and the l symbol.

In another possible implementation, the reference signal port p corresponds to a reference signal sequence Reference signal sequence->Elements mapped on kth subcarrier and the ith symbol +.>The following relationship is satisfied:

k′＝0,1

n＝0,1,...

l′＝0,1

wherein,is a power scaling factor; w (w) _f (k') is the frequency domain mask element, w, corresponding to the subcarrier with index k _t (l ') is a time domain mask element corresponding to the OFDM symbol with index of l', and specific values are shown in tables 26 to 29; r (n) is an element of the base sequence mapped on the kth subcarrier and the ith symbol.

Wherein table 26 corresponds to a pattern obtained by single symbol spreading for configuration type 1; table 27 corresponds to a pattern obtained for the configuration type 1 two-symbol spread; table 28 corresponds to a pattern obtained for configuration type 2 single symbol spreading; table 29 corresponds to the pattern obtained for the configuration type 2 two-symbol spread.

Table 26

/>

In table 26, when the port index value is 4 to 11, the corresponding DMRS port is the newly added port. The index value of the newly added port of the DMRS is not limited in this application, for example, the port index value of the newly added port may be 8-15. I.e., the antenna port P index values 1004 to 1011 in table 22 may be replaced with 1008 to 1015 in sequence.

Table 27

In table 27, when the port index value is 8 to 23, the corresponding DMRS port is the newly added port. The index value of the DMRS newly added port is not limited in the present application.

Table 28

/>

In table 28, when the port index value is 6 to 17, the corresponding DMRS port is the newly added port. The index value of the newly added port of the DMRS is not limited in this application, for example, the port index value of the newly added port may be 12 to 23. I.e. the index values of the antenna port P in the table 28 are sequentially replaced by 1012 to 1023 with the index values of 1006 to 1017.

Table 29

In table 29, when the port index value is 12 to 35, the corresponding DMRS port is the newly added port. The index value of the DMRS newly added port is not limited in the present application.

After the DMRS is mapped to the corresponding time-frequency resource according to the time-frequency resource mapping rule, the network device may send the DMRS to the terminal device. Further, the network device transmits 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 one of the DMRS configuration types shown in fig. 4 to 7; the scheduled DMRS ports indicated by the network device may be as in any of tables 16 to 21. Therefore, the terminal equipment can receive the DMRS on the corresponding time-frequency resource based on the power ratio according to the indication information of the network equipment.

The scheme of transmitting the reference signal in the downlink communication is mainly described above, and the scheme of transmitting the reference signal in the uplink communication is briefly described below.

Fig. 8 is a schematic flow chart diagram of another method 800 for transmitting and receiving reference signals provided by an embodiment of the present application. The steps in method 800 are briefly described below using reference signals as DMRS.

S810, the network device determines the scheduled DMRS port.

Specifically, the network device may determine the DMRS port to be scheduled according to the number of data streams currently transmitted. 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, or the scheduled DMRS port is one or more of the M DMRS ports.

The M DMRS ports may be the DMRS ports most supported by the system. The M DMRS ports correspond to N CDM groups. The values of M, N may be different for different DMRS configuration types. Specifically, the description of the first port set and the values of N and M may refer to S310.

S820, the network device sends indication information to the terminal device. Accordingly, the terminal device receives the indication information from the network device.

The indication information includes indication information (first indication information) for indicating a DMRS configuration type, or the first indication information is used for indicating a configuration type of a DMRS currently scheduled. The indication information may be transmitted through RRC, for example.

The indication information further includes indication information (second indication information) for indicating the DMRS port to be scheduled, or the second indication information is used for indicating the DMRS port configured by the network device. For example, the indication information may be transmitted through DCI.

S830, the terminal equipment determines a power ratio beta according to the indication information.

The power ratio β is associated with a configuration type of the DMRS, a number of first CDM groups, and a first parameter.

Wherein the first parameter is associated with a time-frequency resource occupied by the reference signal. The first parameter may include at least one of:

Specifically, 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 according to the current scheduled DMRS port and the second correspondence. The second correspondence relationship includes a correspondence relationship between the DMRS port currently scheduled and the number of the first CDM groups, and may be specifically referred to the description in S330. The terminal device may determine the power ratio β according to the configuration type of the DMRS, the first parameter, and the number of the first CDM groups.

And S840, the terminal equipment transmits the DMRS on the scheduled DMRS port based on the power ratio beta.

Accordingly, the network device receives the DMRS from the terminal device on the scheduled DMRS port.

Before the terminal device sends the DMRS to the network device, the terminal device may further determine the DMRS based on the power ratio β, and map the DMRS sequence to a corresponding time-frequency resource according to a time-frequency resource mapping rule.

The terminal device determines that the DMRS is similar to the network device based on the power ratio, and reference may be made to the description in S320.

It should be understood that the specific examples in the embodiments of the present application are intended only to help those skilled in the art to better understand the embodiments of the present application and are not intended to limit the scope of the embodiments of the present application.

It should be further understood that the sequence numbers of the above processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and the internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

It is also to be understood that in the various embodiments of the application, terms and/or descriptions of the various embodiments are consistent and may be referenced to one another in the absence of a particular explanation or logic conflict, and that the features of the various embodiments may be combined to form new embodiments in accordance with their inherent logic relationships.

The method for transmitting the reference signal provided in the embodiment of the present application is described in detail above with reference to fig. 2 to 8. The communication apparatus, the network device, and the terminal device provided by the present application are described below with reference to fig. 9 to 12.

Fig. 9 shows a schematic diagram of a communication device 900 according to an embodiment of the present application.

The communication device 900 includes a transceiver unit 910 and a processing unit 920, where the transceiver unit 910 may be used to implement corresponding communication functions, the transceiver unit 910 may also be referred to as a communication interface or a communication unit, and the processing unit 920 may be used to perform data processing.

Optionally, the communication apparatus 900 further includes a storage unit, where the storage unit may be configured to store instructions and/or data, and the processing unit 920 may read the instructions and/or data in the storage unit, so that the apparatus implements the actions of the network device in the foregoing method embodiments.

In one possible design, the communication apparatus 900 may implement steps or flows corresponding to those performed by the network device in the above method embodiments. The transceiver unit 910 may be configured to perform operations related to the transceiver of the network device in the above method embodiment, for example, operations related to the transceiver of the network device in the embodiment shown in fig. 3 or fig. 8; the processing unit 920 may be configured to perform operations related to processing by a network device in the above method embodiment, such as the operations related to processing by a network device in the embodiment shown in fig. 3 or fig. 8.

In another possible design, the communication device 900 may be a terminal device in the foregoing embodiment, or may be a component (such as a chip) of the terminal device. The communication apparatus 900 may implement steps or procedures performed corresponding to the terminal device in the above method embodiment. The transceiver unit 910 may be configured to perform operations related to the transceiver of the terminal device in the above method embodiment, for example, operations related to the transceiver of the terminal device in the embodiment shown in fig. 3 or fig. 8; the processing unit 920 may be configured to perform operations related to processing of a terminal device in the above method embodiment, such as the operations related to processing of a terminal device in the embodiment shown in fig. 3 or fig. 8.

Fig. 10 is a schematic block diagram of a communication device 1000 provided in an embodiment of the present application. The apparatus 1000 includes a processor 1010, the processor 1010 being coupled to a memory 1030. Optionally, a memory 1030 is further included for storing computer programs or instructions and/or data, and the processor 1010 is configured to execute the computer programs or instructions stored in the memory 1030, or to read the data stored in the memory 1030, for performing the methods in the method embodiments above.

Optionally, the processor 1010 is one or more.

Optionally, the memory 1030 is one or more.

Optionally, the memory 1030 is integrated with the processor 1010 or separately provided.

Optionally, as shown in fig. 10, the apparatus 1000 further comprises a transceiver 1020, the transceiver 1020 being used for receiving and/or transmitting signals. For example, the processor 1010 is configured to control the transceiver 1020 to receive and/or transmit signals.

As an aspect, the apparatus 1000 is configured to implement the operations performed by the network device in the above method embodiments.

For example, the processor 1010 is configured to execute computer programs or instructions stored in the memory 1030 to implement the relevant operations of the network device in the method embodiments above. For example, the method performed by the network device in the embodiment shown in fig. 3 or fig. 8.

When the communication apparatus 1000 is a network device, it is a base station, for example. Fig. 11 shows a simplified schematic of a base station architecture. The base station includes 1110 a portion and 1120 a portion. The 1112 part is mainly used for receiving and transmitting radio frequency signals and converting the radio frequency signals and baseband signals; the 1120 part is mainly used for baseband processing, control of the base station, and the like. Section 1110 may be generally referred to as a transceiver unit, transceiver circuitry, or transceiver, etc. Portion 1120 is typically a control center of the base station, and may be generally referred to as a processing unit, and is configured to control the base station to perform the processing operations on the network device side in the foregoing method embodiment.

The transceiver unit of section 1110, which may also be referred to as a transceiver or transceiver, includes an antenna and radio frequency circuitry, wherein the radio frequency circuitry is primarily for performing radio frequency processing. Alternatively, the device for implementing the receiving function in the 1110 portion may be regarded as a receiving unit, and the device for implementing the transmitting function may be regarded as a transmitting unit, i.e., the 1110 portion includes the receiving unit and the transmitting unit. The receiving unit may also be referred to as a receiver, or a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, or a transmitting circuit, etc.

Portion 1120 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used for reading and executing the program in the memory to realize the baseband processing function and control of the base station. If there are multiple boards, the boards can be interconnected to enhance processing power. As an alternative implementation manner, the multiple boards may share one or more processors, or the multiple boards may share one or more memories, or the multiple boards may share one or more processors at the same time.

For example, in one implementation, the transceiver unit of section 1110 is configured to perform the steps related to the transceiver performed by the network device in the embodiments shown in fig. 3 to 8; 1120 are used in part to perform the steps associated with the processing performed by the network device in the embodiments shown in fig. 3-8.

It should be understood that fig. 11 is only an example and not a limitation, and the above-described network device including the transceiving unit and the processing unit may not depend on the structure shown in fig. 11.

When the communication device 1000 is a chip, the chip includes a transceiver unit and a processing unit. The receiving and transmitting unit can be an input and output circuit and a communication interface; the processing unit is an integrated processor or microprocessor or integrated circuit on the chip.

Alternatively, the communication apparatus 1000 is configured to implement the operations performed by the terminal device in the above respective method embodiments.

For example, the processor 1010 is configured to execute a computer program or instructions stored in the memory 1030 to implement the operations associated with the terminal device in the various method embodiments above. For example, the method performed by the terminal device in the embodiment shown in fig. 3 or fig. 8.

In implementation, the steps of the methods described above may be performed by integrated logic circuitry in hardware in processor 1010 or by instructions in software. The method disclosed in connection with the embodiments of the present application may be embodied directly in hardware processor execution or in a combination of hardware and software modules in a processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. Which is located in a memory 1030, and the processor 1010 reads information from the memory 1030 and performs the steps of the method described above in connection with its hardware. To avoid repetition, a detailed description is not provided herein.

When the communication apparatus 1100 is a terminal device, fig. 12 shows a simplified schematic structure of the terminal device. For easy understanding and convenient illustration, in fig. 12, a mobile phone is taken as an example of the terminal device. As shown in fig. 12, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the terminal equipment, executing software programs, processing data of the software programs and the like. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for converting a baseband signal and a radio frequency signal and processing the radio frequency signal. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used for receiving data input by a user and outputting data to the user. It should be noted that some kinds of terminal apparatuses may not have an input/output device.

When data need to be sent, the processor carries out baseband processing on the data to be sent and then outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit carries out radio frequency processing on the baseband signal and then sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of illustration, only one memory and processor are shown in fig. 12, and in an actual end device product, one or more processors and one or more memories may be present. The memory may also be referred to as a storage medium or storage device, etc. The memory may be provided separately from the processor or may be integrated with the processor, which is not limited in this application.

In the embodiment of the present application, the antenna and the radio frequency circuit with the transceiver function may be regarded as a transceiver unit of the terminal device, and the processor with the processing function may be regarded as a processing unit of the terminal device.

As shown in fig. 12, the terminal device includes a transceiving unit 1210 and a processing unit 1220. The transceiver unit 1210 may also be referred to as a transceiver, a transceiver device, etc. The processing unit 1220 may also be referred to as a processor, processing board, processing module, processing device, etc.

Alternatively, a device for implementing a receiving function in the transceiver unit 1210 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiver unit 1210 may be regarded as a transmitting unit, i.e., the transceiver unit 1210 includes a receiving unit and a transmitting unit. The transceiver unit may also be referred to as a transceiver, transceiver circuitry, or the like. The receiving unit may also be referred to as a receiver, or receiving circuit, among others. The transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

For example, in one implementation, the transceiving unit 1210 is configured to perform the receiving operation of the terminal device in fig. 3 to 8. The processing unit 1220 is configured to execute the processing actions on the terminal device side in fig. 3 to 8.

It should be understood that fig. 12 is only an example and not a limitation, and the above-described terminal device including the transceiving unit and the processing unit may not depend on the structure shown in fig. 12.

When the communication device 1000 is a chip, the chip includes a transceiver unit and a processing unit. The receiving and transmitting unit can be an input and output circuit or a communication interface; the processing unit may be an integrated processor or microprocessor or an integrated circuit on the chip.

The embodiment of the application also provides a network device, which comprises: a processor coupled to a memory for storing a program or instructions that, when executed by the processor, cause the network device to perform the method of transmitting a reference signal as claimed in any preceding claim.

The embodiment of the application also provides a network device, which comprises a receiving and transmitting unit and a processing unit. The transceiver unit may be configured to perform the steps of transmitting and receiving by the network device in the above-described method embodiment. The processing unit may be configured to perform steps of the network device other than transmitting and receiving in the above-described method embodiments.

Embodiments of the present application also provide a computer-readable storage medium having stored thereon a computer program or instructions, which when executed, cause a computer to perform transmitting a reference signal as claimed in any one of the preceding claims.

Embodiments of the present application also provide a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method performed by the network device as described above.

Embodiments of the present application also provide a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method performed by the terminal device as described above.

The embodiment of the application also provides a communication system, which comprises the network equipment and the terminal equipment in the embodiment.

As one example, the communication system includes: the network device and the terminal device in the embodiments described above in connection with fig. 3 to 8.

Any explanation and beneficial effects of the related content in any of the communication devices provided above may refer to the corresponding method embodiments provided above, and are not described herein.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of transmitting a reference signal, comprising:

the network equipment determines a power ratio beta;

the network equipment sends a reference signal to terminal equipment based on the power ratio beta;

the power ratio β is associated with a first parameter, a configuration type of the reference signal, and a number of first code division multiplexing CDM groups, where the first parameter is associated with a first time-frequency resource occupied by the reference signal, and the first code division multiplexing CDM groups are CDM groups that do not transmit data.

2. The method of claim 1, wherein the first parameter comprises at least one of the following parameters:

the index of the antenna port associated with the reference signal, the index of the time-frequency resource occupied by the reference signal, and the ratio of the number of the time-frequency resources occupied by the reference signal to the number of the time-frequency resources occupied by the data corresponding to the reference signal.

3. The method of claim 1 or 2, wherein the reference signal is a first reference signal corresponding to a first port, the first port is one port in a first port set, the ports in the first port set correspond to N CDM groups, time-frequency resources corresponding to each CDM group in the N CDM groups are not coincident, and N is an integer greater than or equal to 3.

4. The method of claim 3, wherein the step of,

the N is 3 or 4, 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,

and N is 4, 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.

5. The method of claim 3 or 4, wherein the first port set further comprises a second port, and wherein a ratio of a number of time-frequency resources occupied by a second reference signal of the second port to a number of time-frequency resources occupied by data corresponding to the second reference signal is different from a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal.

6. The method according to any one of claims 3 to 5, wherein the first parameter further comprises the value of N.

7. The method according to any one of claims 1 to 6, further comprising:

the network device sends indication information to the terminal device, wherein the indication information comprises first indication information and second indication information, the first indication information indicates a reference signal configuration type corresponding to the reference signal, and the second indication information indicates an index of an antenna port associated with the reference signal.

8. The method according to any of claims 1 to 7, wherein the network device transmitting a reference signal to a terminal device based on the power ratio β, comprises:

the network device determines a power scaling factor according to the power ratio beta

The network device is based on the power scaling factorTransmitting the reference signal to the terminal equipment;

wherein the power ratio beta and the power scaling factorThe following relationship is satisfied: />

9. A method of receiving a reference signal, comprising:

the terminal equipment determines a power ratio beta;

the terminal equipment receives a reference signal based on the power ratio beta;

10. The method of claim 9, wherein the first parameter comprises at least one of:

11. The method of claim 9 or 10, wherein the reference signal is a first reference signal corresponding to a first port, the first port is one port in a first port set, the ports in the first port set correspond to N CDM groups, time-frequency resources corresponding to each CDM group in the N CDM groups are not coincident, and N is an integer greater than or equal to 3.

12. The method of claim 11, wherein the step of determining the position of the probe is performed,

13. The method according to claim 11 or 12, wherein the first port set further comprises a second port, and wherein a ratio of a number of time-frequency resources occupied by a second reference signal of the second port to a number of time-frequency resources occupied by data corresponding to the second reference signal is different from a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal.

14. The method according to any one of claims 11 to 13, wherein the first parameter further comprises the value of N.

15. The method according to any one of claims 9 to 14, further comprising:

the terminal equipment receives indication information from the network equipment, wherein the indication information comprises first indication information and second indication information, the first indication information indicates a reference signal configuration type corresponding to the reference signal, and the second indication information indicates an index of an antenna port associated with the reference signal;

the terminal device determines a power ratio β, including:

and the terminal equipment determines the power ratio beta according to the reference signal configuration type corresponding to the reference signal and the index of the antenna port associated with the reference signal.

16. The method according to any of the claims 9 to 15, characterized in that the terminal device receives a reference signal based on the power ratio β, comprising:

the terminal equipment determines a power scaling factor according to the power ratio beta

The terminal device is based on the power scaling factorReceiving the reference signal;

wherein the power ratio beta and the power scaling factor The following relationship is satisfied: />

17. A communication device is characterized by comprising a processing unit and a receiving and transmitting unit,

the processing unit is used for determining a power ratio beta;

the receiving and transmitting unit is used for transmitting a reference signal to terminal equipment based on the power ratio beta;

18. The apparatus of claim 17, wherein the first parameter comprises at least one of:

19. The apparatus of claim 17 or 18, wherein the reference signal is a first reference signal corresponding to a first port, the first port is one port in a first port set, the ports in the first port set correspond to N CDM groups, time-frequency resources corresponding to each CDM group in the N CDM groups are not coincident, and N is an integer greater than or equal to 3.

20. The apparatus of claim 19, wherein the device comprises a plurality of sensors,

21. The apparatus of claim 19 or 20, wherein the first port set further comprises a second port, and wherein a ratio of a number of time-frequency resources occupied by a second reference signal of the second port to a number of time-frequency resources occupied by data corresponding to the second reference signal is different from a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal.

22. The apparatus of any one of claims 19 to 21, wherein the first parameter further comprises a value of the N.

23. The apparatus according to any one of claims 17 to 22, wherein the transceiver unit is further configured to:

And sending indication information to the terminal equipment, wherein the indication information comprises first indication information and second indication information, the first indication information indicates a reference signal configuration type corresponding to the reference signal, and the second indication information indicates an index of an antenna port associated with the reference signal.

24. The device according to any one of claims 17 to 23, wherein,

the processing unit is specifically configured to determine a power scaling factor according to the power ratio beta

The transceiver unit is specifically configured to scale the factor based on the powerTransmitting the reference signal to the terminal equipment;

25. A communication device is characterized by comprising a processing unit and a receiving and transmitting unit,

the processing unit is used for determining a power ratio beta;

the receiving and transmitting unit is used for receiving a reference signal based on the power ratio beta;

26. The apparatus of claim 25, wherein the first parameter comprises at least one of:

27. The apparatus of claim 25 or 26, wherein the reference signal is a first reference signal corresponding to a first port, the first port is one port in a first port set, the ports in the first port set correspond to N CDM groups, 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.

28. The apparatus of claim 27, wherein the device comprises a plurality of sensors,

29. The apparatus of claim 27 or 28, wherein the first port set further comprises a second port, and wherein a ratio of a number of time-frequency resources occupied by a second reference signal of the second port to a number of time-frequency resources occupied by data corresponding to the second reference signal is different from a ratio of a number of time-frequency resources occupied by the first reference signal to a number of time-frequency resources occupied by data corresponding to the first reference signal.

30. The apparatus of any one of claims 27 to 29, wherein the first parameter further comprises a value of the N.

31. The device according to any one of claims 25 to 30, wherein,

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 information indicates a reference signal configuration type corresponding to the reference signal, and the second indication information indicates an index of an antenna port associated with the reference signal;

the processing unit is specifically configured to:

and determining the power ratio beta according to the reference signal configuration type corresponding to the reference signal and the index of the antenna port associated with the reference signal.

32. The device according to any one of claims 9 to 15, wherein,

the processing unit is specifically configured to determine a power scaling factor according to the power ratio β

The transceiver unit is specifically configured to, based on the power scaling factorReceiving the reference signal;

33. A network device, comprising:

a unit or module comprising means for performing the method of any one of claims 1 to 8.

34. A terminal device, comprising:

a unit or module comprising means for performing the method of any one of claims 9 to 16.

35. A communication device, comprising:

a processor coupled to a memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any one of claims 1 to 8 or to perform the method of any one of claims 9 to 16.

36. A readable storage medium having stored thereon a computer program or instructions, which when executed, cause a computer to perform the method of any of claims 1 to 8, or 9 to 16.