Communication method and apparatus

Abstract

The present application relates to the technical field of communications, and provides a communication method and an apparatus, which are used for determining, when two PTRS ports correspond to two MCSs, time domain densities corresponding to the two PTRS ports. In the method, if two PTRS ports correspond to two MCSs, for example, a first MCS and a second MCS, a first time domain density corresponding to a first PTRS port may be determined on the basis of the first MCS and / or the second MCS indicated by a network device, and a time domain density corresponding to a second PTRS port may also be determined on the basis of the first MCS and / or the second MCS indicated by the network device. In this way, the terminal device can determine the first time domain density corresponding to the first PTRS port and the second time domain density corresponding to the second PTRS port, so that the terminal device subsequently sends a first PTRS on the first PTRS port and sends a second PTRS on the second PTRS port, thus improving the communication reliability.

Description

Communication method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on August 11, 2023, with application number 202311018942.8 and application name “Communication Method and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and in particular to a communication method and device. Background Art

[0003] Phase tracking reference signals (PTRS) are reference signals used by the receiving end to measure phase noise and estimate frequency domain offsets. Typically, a PTRS port is bound to an associated demodulation reference signal (DMRS) port for transmission, and uses the same sequence as the bound DMRS port. Currently, the existing new radio (NR) protocol supports a maximum uplink of less than or equal to 4 transmissions and 4 streams (transport layer rank). In NR version 18 (release 18, R18), further enhanced support for the number of uplink transmit antennas and the maximum number of uplink transmission streams is provided, and the uplink transmission capability of the maximum uplink 8T8 streams is standardized.

[0004] However, in scenarios where a single terminal supports more than 4 and / or more than 4 layers of transmission, if two PTRS ports correspond to two modulation and coding schemes (MCS), how to determine the time domain density corresponding to the two PTRS ports is a technical problem that needs to be solved urgently.

[0005] Summary of the Invention

[0006] Embodiments of the present application provide a communication method and apparatus for determining time domain densities corresponding to two PTRS ports when the two PTRS ports correspond to two MCSs.

[0007] To achieve the above objectives, this application adopts the following technical solutions:

[0008] In a first aspect, a communication method is provided, performed by a terminal device, the method comprising: receiving first indication information, sending a first phase tracking reference signal (PTRS) via a first PTRS port, and sending a second PTRS via a second PTRS port. The first indication information indicates a first modulation and coding scheme (MCS) and a second MCS; the time domain density corresponding to the first PTRS is a first time domain density, which is associated with the first MCS and / or the second MCS; and the time domain density corresponding to the second PTRS is a second time domain density, which is associated with the first MCS and / or the second MCS.

[0009] Based on the methods described in the first and second aspects, it can be known that if two PTRS ports correspond to two MCSs, such as the first MCS and the second MCS, the first time domain density corresponding to the first PTRS port can be determined based on the first MCS and / or the second MCS indicated by the network device, and the time domain density corresponding to the second PTRS port can also be determined based on the first MCS and / or the second MCS indicated by the network device. In this way, the terminal device can determine the first time domain density corresponding to the first PTRS port and the second time domain density corresponding to the second PTRS port, so that the terminal device can subsequently send the first PTRS on the first PTRS port and send the second PTRS on the second PTRS port, thereby improving the reliability and efficiency of communication.

[0010] In a possible design scheme, the method of the first aspect may further include: receiving second indication information. The second indication information includes PTRS time domain density information, and the PTRS time domain density information is used to indicate multiple MCS threshold values; the first time domain density is associated with at least one of the following: the first MCS and multiple MCS threshold values; the second MCS and multiple MCS threshold values; or the first MCS, the second MCS, and multiple MCS threshold values; the second time domain density is associated with at least one of the following: the first MCS and multiple MCS threshold values; the second MCS and multiple MCS threshold values; or the first MCS, the second MCS, and multiple MCS threshold values. This allows the terminal device to accurately determine the first time domain density and the second time domain density based on the association between the first MCS, the second MCS, and the multiple MCS threshold values, thereby improving communication efficiency.

[0011] Optionally, the multiple MCS threshold values ​​include at least one of the following: a first MCS threshold value, a second MCS threshold value, or a third MCS threshold value. The multiple MCS threshold values ​​may also include any other possible values ​​to meet different requirements without limitation.

[0012] In one possible design scheme, the first time domain density is associated with the first MCS and multiple MCS threshold values; the second time domain density is associated with the first MCS and multiple MCS threshold values. The first time domain density is associated with the first MCS and multiple MCS threshold values ​​and satisfies any of the following: if the first MCS is less than the first MCS threshold value, the first PTRS does not exist; if the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the first time domain density is the first value; if the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the first time domain density is the second value; if the first MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the first time domain density is the third value; wherein the fourth MCS threshold value is a preset value. The second time domain density is associated with the first MCS and multiple MCS threshold values ​​and satisfies any of the following items: if the first MCS is less than the first MCS threshold value, the second PTRS does not exist; if the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the second time domain density is the first value; if the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the second time domain density is the second value; if the first MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the second time domain density is the third value.

[0013] It can be understood that the first MCS threshold value, the second MCS threshold value, the third MCS threshold value and the fourth MCS threshold value can be divided into different intervals, each interval corresponds to a time domain density value, and the terminal device can determine the first time domain density and the second time domain density based on the interval where the first MCS is located.

[0014] In a possible design scheme, the first time domain density is associated with the fourth value and multiple MCS threshold values; the second time domain density is associated with the fourth value and multiple MCS threshold values; and the fourth value is associated with the first MCS and the second MCS. The first time domain density is associated with the fourth value and multiple MCS threshold values ​​and satisfies any of the following: if the fourth value is less than the first MCS threshold value, the first PTRS does not exist; if the fourth value is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the first time domain density is the first value; if the fourth value is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the first time domain density is the second value; if the fourth value is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the first time domain density is the third value; wherein, the fourth MCS threshold value is a preset value. The second time domain density is associated with the fourth value and multiple MCS threshold values ​​and satisfies any of the following items: if the fourth value is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the second time domain density is the first value; if the fourth value is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the second time domain density is the second value; if the fourth value is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the second time domain density is the third value.

[0015] It can be understood that the first MCS threshold value, the second MCS threshold value, the third MCS threshold value and the fourth MCS threshold value can be divided into different intervals, each interval corresponds to a time domain density value, and the terminal device can determine the first time domain density and the second time domain density based on the interval where the fourth value is located.

[0016] Optionally, the fourth value is at least one of the following: Mean (first MCS, second MCS); or, It is understandable that the fourth value may also be any other possible value to meet different needs without limitation.

[0017] Optionally, the first MCS is greater than the second MCS. That is, when the MCSs corresponding to the first PTRS port and the second PTRS port are not equal, the terminal device can directly use the larger of the two MCSs, such as the first MCS, or the terminal device can directly use the fourth value associated with the two MCSs as the first time domain density and the second time domain density. At this time, the values ​​of the first time domain density and the second time domain density are equal, thereby avoiding the problem that when the MCSs of the two PTRS ports fall in different intervals, the time domain densities corresponding to the two PTRS ports are different, resulting in different power coefficients of some PTRS ports on different OFDM symbols, which further causes the power coefficient of the PTRS sent by the part of the PTRS ports on some OFDM symbols to exceed the maximum power coefficient that the OFDM can support, thereby improving the reliability of communication.

[0018] Optionally, the first MCS is smaller than the second MCS. That is, when the MCSs corresponding to the first PTRS port and the second PTRS port are not equal, the terminal device can directly use the smaller of the two MCSs, such as the first MCS, or use the fourth value associated with the two MCSs as the first time domain density and the second time domain density. At this time, the values ​​of the first time domain density and the second time domain density are equal, thereby avoiding the problem that when the MCSs of the two PTRS ports fall in different intervals, the time domain densities corresponding to the two PTRS ports are different, resulting in different power coefficients of some PTRS ports on different OFDM symbols, which further causes the power coefficients of the PTRS sent by these some PTRS ports on some OFDM symbols to exceed the maximum power coefficient that the OFDM can support, thereby improving the reliability of communication.

[0019] In one possible design, the first PTRS port corresponds to the first MCS, and the second PTRS port corresponds to the second MCS; the fifth value is associated with the first MCS and multiple MCS threshold values; the sixth value is associated with the second MCS and multiple MCS threshold values; the first time domain density is associated with the fifth value and the sixth value; the second time domain density is associated with the fifth value and the sixth value. The fifth value is associated with the first MCS and multiple MCS threshold values ​​and satisfies any of the following: if the first MCS is less than the first MCS threshold value, the first PTRS does not exist; if the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the fifth value is the first value; if the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the fifth value is the second value; if the first MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the fifth value is the third value; wherein the fourth MCS threshold value is a preset value. The sixth value, associated with the second MCS and multiple MCS threshold values, satisfies any of the following: if the second MCS is less than the first MCS threshold value, the second PTRS does not exist; if the second MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the sixth value is the first value; if the second MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the fifth value is the second value; if the second MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the sixth value is the third value.

[0020] It can be understood that the terminal device determines the fifth value based on the interval where the first MCS is located, and determines the sixth value based on the interval where the second MCS is located, so that the terminal device can determine the first time domain density and the second time domain density.

[0021] Optionally, when the fifth value is greater than the sixth value, the values ​​of the first time domain density and the second time domain density are both equal to the fifth value. That is, when the first MCS and the second MCS fall in different intervals, the terminal device can directly use the larger fifth value of the time domain density values ​​corresponding to the two MCSs as the first time domain density and the second time domain density. At this time, the values ​​of the first time domain density and the second time domain density are equal, thereby avoiding the problem that when the MCSs of the two PTRS ports fall in different intervals, the time domain densities corresponding to the two PTRS ports are different, resulting in different power coefficients of some PTRS ports on different OFDM symbols, which further leads to the problem that the power coefficient of the PTRS sent by the part of the PTRS ports on some OFDM symbols exceeds the maximum power coefficient that the OFDM can support, thereby improving the reliability of communication.

[0022] Optionally, when the fifth value is less than the sixth value, the values ​​of the first time domain density and the second time domain density are both equal to the fifth value. That is, when the first MCS and the second MCS fall in different intervals, the terminal device can directly use the smaller fifth value of the time domain density values ​​corresponding to the two MCSs as the first time domain density and the second time domain density. At this time, the values ​​of the first time domain density and the second time domain density are equal, thereby avoiding the problem that when the MCSs of the two PTRS ports fall in different intervals, the time domain densities corresponding to the two PTRS ports are different, resulting in different power coefficients of some PTRS ports on different OFDM symbols, which further leads to the problem that the power coefficient of the PTRS sent by the part of the PTRS ports on some OFDM symbols exceeds the maximum power coefficient that the OFDM can support, thereby improving the reliability of communication.

[0023] Optionally, when the fifth value is greater than the sixth value, the value of the first time domain density and the value of the second time domain density are equal to the seventh value; the seventh value is associated with the fifth value and the sixth value. That is, when the first MCS and the second MCS fall in different intervals, the terminal device can use the seventh value associated with the fifth value and the sixth value as the first time domain density and the second time domain density. At this time, the values ​​of the first time domain density and the second time domain density are equal, thereby avoiding the problem that when the MCSs of the two PTRS ports fall in different intervals, the time domain densities corresponding to the two PTRS ports are different, resulting in different power coefficients of some PTRS ports on different OFDM symbols, which further causes the power coefficient of the PTRS sent by the part of the PTRS ports on some OFDM symbols to exceed the maximum power coefficient that the OFDM can support, thereby improving the reliability of communication.

[0024] Optionally, when the fifth value is less than the sixth value, the value of the first time domain density and the value of the second time domain density are equal to the seventh value; the seventh value is associated with the fifth value and the sixth value. That is, when the first MCS and the second MCS fall in different intervals, the terminal device can use the seventh value associated with the fifth value and the sixth value as the first time domain density and the second time domain density. At this time, the values ​​of the first time domain density and the second time domain density are equal, thereby avoiding the problem that when the MCSs of the two PTRS ports fall in different intervals, the time domain densities corresponding to the two PTRS ports are different, resulting in different power coefficients of some PTRS ports on different OFDM symbols, which further causes the power coefficient of the PTRS sent by the part of the PTRS ports on some OFDM symbols to exceed the maximum power coefficient that the OFDM can support, thereby improving the reliability of communication.

[0025] Furthermore, the seventh value is at least one of the following: Mean (fifth value, sixth value); or, It is understandable that the fourth value may also be any other possible value to meet different needs without limitation.

[0026] In one possible design scheme, the first indication information also indicates PUSCH precoding and transmission layer number information, and the second indication information also includes PTRS power information, so that the subsequent terminal device can determine the corresponding power coefficients of the first PTRS and the second PTRS.

[0027] In one possible design, the first power coefficient is associated with at least one of the following: PUSCH precoding, information about the number of transmission layers, PTRS power information, or the value of the first scheduled PTRS port number. The first power coefficient is the power coefficient corresponding to the first PTRS. The second power coefficient is associated with at least one of the following: PUSCH precoding, information about the number of transmission layers, PTRS power information, or the value of the second scheduled PTRS port number. The second power coefficient is the power coefficient corresponding to the second PTRS. In this way, the terminal device can accurately determine the first power coefficient and the second power coefficient.

[0028] Optionally, when the first time domain density is less than the second time domain density, the value of the first scheduled PTRS port number is 1, and the value of the second scheduled PTRS port number is 2. It can be understood that when the time domain densities corresponding to the two PTRS ports are different, some PTRS ports, such as the first PTRS port with a smaller time domain density, will have different power coefficients on different OFDM symbols, which will further cause the power coefficients of these some PTRS ports sending PTRS on some OFDM symbols to exceed the maximum power coefficient that can be supported by the OFDM symbol. At this time, the terminal device sets the value of the first scheduled PTRS port number to 1 and the value of the second scheduled PTRS port number to 2, thereby ensuring that the power coefficient of the first PTRS port sends the first PTRS with a smaller power coefficient, so that the maximum power coefficient requirement that can be supported by the OFDM symbol can be met in all OFDM symbols, thereby improving the reliability of communication.

[0029] Optionally, the value of the first number of scheduled PTRS ports is associated with the number of PTRS ports that actually transmit PTRS signals in each OFDM symbol; the value of the second number of scheduled PTRS ports is associated with the number of PTRS ports that actually transmit PTRS signals in each OFDM symbol; the PTRS signal includes the first PTRS and the second PTRS; and the OFDM symbol is the OFDM symbol included in the PUSCH. That is, the first power coefficient and the second power coefficient are calculated at the granularity of each OFDM symbol. The terminal device can calculate the first power coefficient and the second power coefficient separately for each OFDM symbol, thereby improving the accuracy of the first power coefficient and the second power coefficient and improving communication reliability.

[0030] In a second aspect, a communication method is provided, performed by a network device. The method includes: sending first indication information, and receiving a first PTRS, and a second PTRS. The first indication information indicates a first modulation and coding scheme (MCS) and a second MCS; the first PTRS is a PTRS sent on a first PTRS port, the time domain density corresponding to the first PTRS is a first time domain density, and the first time domain density is associated with the first MCS and / or the second MCS; the second PTRS is a PTRS sent on a second PTRS port, the time domain density corresponding to the second PTRS is a second time domain density, and the second time domain density is associated with the first MCS and / or the second MCS.

[0031] In one possible design scheme, the second indication information includes PTRS time domain density information, and the PTRS time domain density information is used to indicate multiple MCS threshold values; the first time domain density is associated with at least one of the following: a first MCS and multiple MCS threshold values; a second MCS and multiple MCS threshold values; or, a first MCS, a second MCS, and multiple MCS threshold values; the second time domain density is associated with at least one of the following: a first MCS and multiple MCS threshold values; a second MCS and multiple MCS threshold values; or, a first MCS, a second MCS, and multiple MCS threshold values.

[0032] Optionally, the multiple MCS threshold values ​​include at least one of the following: a first MCS threshold value, a second MCS threshold value, or a third MCS threshold value.

[0033] In one possible design scheme, the first time domain density is associated with the first MCS and multiple MCS threshold values; the second time domain density is associated with the first MCS and multiple MCS threshold values. The first time domain density is associated with the first MCS and multiple MCS threshold values ​​and satisfies any of the following: if the first MCS is less than the first MCS threshold value, the first PTRS does not exist; if the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the first time domain density is the first value; if the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the first time domain density is the second value; if the first MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the first time domain density is the third value; wherein the fourth MCS threshold value is a preset value. The second time domain density is associated with the first MCS and multiple MCS threshold values ​​and satisfies any of the following items: if the first MCS is less than the first MCS threshold value, the second PTRS does not exist; if the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the second time domain density is the first value; if the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the second time domain density is the second value; if the first MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the second time domain density is the third value.

[0034] In a possible design scheme, the first time domain density is associated with the fourth value and multiple MCS threshold values; the second time domain density is associated with the fourth value and multiple MCS threshold values; and the fourth value is associated with the first MCS and the second MCS. The first time domain density is associated with the fourth value and multiple MCS threshold values ​​and satisfies any of the following: if the fourth value is less than the first MCS threshold value, the first PTRS does not exist; if the fourth value is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the first time domain density is the first value; if the fourth value is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the first time domain density is the second value; if the fourth value is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the first time domain density is the third value; wherein, the fourth MCS threshold value is a preset value. The second time domain density is associated with the fourth value and multiple MCS threshold values ​​and satisfies any of the following items: if the fourth value is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the second time domain density is the first value; if the fourth value is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the second time domain density is the second value; if the fourth value is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the second time domain density is the third value.

[0035] Optionally, the fourth value is at least one of the following: Mean (first MCS, second MCS); or,

[0036] Optionally, the first MCS is greater than the second MCS.

[0037] Optionally, the first MCS is smaller than the second MCS.

[0038] In one possible design, the first PTRS port corresponds to the first MCS, and the second PTRS port corresponds to the second MCS; the fifth value is associated with the first MCS and multiple MCS threshold values; the sixth value is associated with the second MCS and multiple MCS threshold values; the first time domain density is associated with the fifth value and the sixth value; the second time domain density is associated with the fifth value and the sixth value. The fifth value is associated with the first MCS and multiple MCS threshold values ​​and satisfies any of the following: if the first MCS is less than the first MCS threshold value, the first PTRS does not exist; if the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the fifth value is the first value; if the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the fifth value is the second value; if the first MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the fifth value is the third value; wherein the fourth MCS threshold value is a preset value. The sixth value, associated with the second MCS and multiple MCS threshold values, satisfies any of the following: if the second MCS is less than the first MCS threshold value, the second PTRS does not exist; if the second MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the sixth value is the first value; if the second MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the fifth value is the second value; if the second MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the sixth value is the third value.

[0039] Optionally, when the fifth value is greater than the sixth value, the values ​​of the first time-domain density and the second time-domain density are both equal to the fifth value.

[0040] Optionally, when the fifth value is smaller than the sixth value, the values ​​of the first time-domain density and the second time-domain density are both equal to the fifth value.

[0041] Optionally, when the fifth value is greater than the sixth value, the value of the first time domain density and the value of the second time domain density are equal to the seventh value; the seventh value is associated with the fifth value and the sixth value.

[0042] Optionally, when the fifth value is less than the sixth value, the value of the first time-domain density and the value of the second time-domain density are equal to the seventh value; the seventh value is associated with the fifth value and the sixth value.

[0043] Furthermore, the seventh value is at least one of the following: Mean (fifth value, sixth value); or,

[0044] In one possible design scheme, the first indication information also indicates PUSCH precoding and transmission layer number information, and the second indication information also includes PTRS power information.

[0045] In one possible design, the first power coefficient is associated with at least one of the following: PUSCH precoding, number of transmission layers, PTRS power information, or the value of the first scheduled PTRS port number. The first power coefficient is the power coefficient corresponding to the first PTRS. The second power coefficient is associated with at least one of the following: PUSCH precoding, number of transmission layers, PTRS power information, or the value of the second scheduled PTRS port number. The second power coefficient is the power coefficient corresponding to the second PTRS.

[0046] In addition, the technical effects of the method described in the second aspect can refer to the technical effects of the communication method described in the first aspect, and will not be repeated here.

[0047] In a third aspect, a communication device is provided. The device includes modules for executing the method described in the first aspect. For example, a transceiver module and a processing module. The transceiver module can be used to implement the device's message sending and receiving functions. The processing module can be used to implement the device's functions other than message sending and receiving.

[0048] Optionally, the transceiver module may include a sending module and a receiving module, wherein the sending module is used to implement the sending function of the communication device described in the third aspect, and the receiving module is used to implement the receiving function of the communication device described in the third aspect.

[0049] Optionally, the communication device described in the third aspect may further include a storage module, wherein the storage module stores a program or instruction. When the processing module executes the program or instruction, the communication device may execute the communication method described in the first aspect.

[0050] It should be noted that the communication device described in the third aspect can be a terminal device, or a chip (system) or other parts or components that can be set in the terminal device, or a device that includes a terminal device. This application does not limit this.

[0051] In addition, the technical effects of the communication device described in the third aspect can refer to the technical effects of the communication method described in the first aspect, and will not be repeated here.

[0052] In a fourth aspect, a communication device is provided. The device includes modules for executing the method described in the second aspect, such as a transceiver module and a processing module. The transceiver module can be used to implement the device's message sending and receiving functions. The processing module can be used to implement the device's functions other than message sending and receiving.

[0053] For example: a processing module is used to control the transceiver module to send a first indication information. The transceiver module is used to receive a first PTRS. The transceiver module is also used to receive a second PTRS. The first indication information indicates a first modulation and coding scheme MCS and a second MCS; the first PTRS is a PTRS sent on a first PTRS port, the time domain density corresponding to the first PTRS is a first time domain density, and the first time domain density is associated with the first MCS and / or the second MCS; the second PTRS is a PTRS sent on a second PTRS port, the time domain density corresponding to the second PTRS is a second time domain density, and the second time domain density is associated with the first MCS and / or the second MCS.

[0054] Optionally, the transceiver module may include a sending module and a receiving module, wherein the sending module is used to implement the sending function of the communication device described in the fourth aspect, and the receiving module is used to implement the receiving function of the communication device described in the fourth aspect.

[0055] Optionally, the communication device described in the fourth aspect may further include a storage module, wherein the storage module stores a program or instruction. When the processing module executes the program or instruction, the communication device can execute the communication method described in the second aspect.

[0056] It should be noted that the communication device described in the fourth aspect can be a network device, or a chip (system) or other parts or components that can be set in the network device, or a device that includes a network device. This application does not limit this.

[0057] In addition, the technical effects of the communication device described in the fourth aspect can refer to the technical effects of the communication method described in the second aspect, and will not be repeated here.

[0058] In a fifth aspect, a communication device is provided, comprising: a processor configured to execute the method described in any one of the implementations of the first aspect or the second aspect.

[0059] In one possible design solution, the communication device described in the fifth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the fifth aspect to communicate with other communication devices.

[0060] In one possible design, the communication device described in the fifth aspect may further include a memory. The memory may be integrated with the processor or provided separately. The memory may be used to store the computer program and / or data involved in the method described in any one of the implementations of the first aspect or the second aspect.

[0061] In the present application, the communication device described in the fifth aspect can be the network device in the above-mentioned first aspect or second aspect, or a device including the above-mentioned network device, or a device included in the above-mentioned network device, such as a chip; or, the communication device can be the terminal device in the above-mentioned first aspect or second aspect, or a device including the above-mentioned terminal device, or a device included in the above-mentioned terminal device, such as a chip.

[0062] In addition, the technical effects of the communication device described in the fifth aspect can refer to the technical effects of the method described in any one of the implementation methods in the first aspect or the second aspect, and will not be repeated here.

[0063] In a sixth aspect, a communication device is provided, comprising: a processor coupled to a memory, the processor configured to execute a computer program stored in the memory, so that the communication device performs the method described in any one of the implementations of the first aspect or the second aspect.

[0064] In one possible design solution, the communication device described in the sixth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the sixth aspect to communicate with other communication devices.

[0065] In the present application, the communication device described in the sixth aspect can be the network device in the above-mentioned first aspect or second aspect, or a device including the above-mentioned network device, or a device included in the above-mentioned network device, such as a chip; or, the communication device can be the terminal device in the above-mentioned first aspect or second aspect, or a device including the above-mentioned terminal device, or a device included in the above-mentioned terminal device, such as a chip.

[0066] In addition, the technical effects of the communication device described in the sixth aspect can refer to the technical effects of the method described in any one of the implementation methods in the first aspect or the second aspect, and will not be repeated here.

[0067] In the seventh aspect, a communication device is provided, comprising: a processor and a memory; the memory is used to store a computer program, and when the processor executes the computer program, the communication device executes the method described in any one of the implementation methods in the first aspect or the second aspect.

[0068] In one possible design solution, the communication device described in the seventh aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the seventh aspect to communicate with other communication devices.

[0069] In the present application, the communication device described in the seventh aspect can be the network device in the above-mentioned first aspect or second aspect, or a device including the above-mentioned network device, or a device included in the above-mentioned network device, such as a chip; or, the communication device can be the terminal device in the above-mentioned first aspect or second aspect, or a device including the above-mentioned terminal device, or a device included in the above-mentioned terminal device, such as a chip.

[0070] In addition, the technical effects of the communication device described in the seventh aspect can refer to the technical effects of the method described in any one of the implementation methods in the first aspect or the second aspect, and will not be repeated here.

[0071] In an eighth aspect, a communication device is provided, comprising: a processor; the processor is used to couple with a memory, and after reading a computer program in the memory, execute the method described in any one of the implementation methods of the first aspect or the second aspect according to the computer program.

[0072] In one possible design solution, the communication device described in the eighth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the eighth aspect to communicate with other communication devices.

[0073] In the present application, the communication device described in the eighth aspect can be the network device in the above-mentioned first aspect or second aspect, or a device including the above-mentioned network device, or a device included in the above-mentioned network device, such as a chip; or, the communication device can be the terminal device in the above-mentioned first aspect or second aspect, or a device including the above-mentioned terminal device, or a device included in the above-mentioned terminal device, such as a chip.

[0074] In addition, the technical effects of the communication device described in the eighth aspect can refer to the technical effects of the method described in any one of the implementation methods in the first aspect or the second aspect, and will not be repeated here.

[0075] In a ninth aspect, a communication system is provided, which includes the terminal device described in the above aspect and the network device described in the above aspect.

[0076] In a tenth aspect, a computer-readable storage medium is provided, comprising: a computer program or instructions; when the computer program or instructions are run on a computer, the computer executes the method described in any one of the implementation methods in the first aspect or the second aspect.

[0077] In the eleventh aspect, a computer program product is provided, comprising a computer program or instructions, which, when executed on a computer, causes the computer to execute the method described in any one of the implementations of the first aspect or the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] FIG1 is a schematic diagram of time-frequency resource mapping of Type 1 DMRS;

[0079] FIG2 is a schematic diagram of time-frequency resource mapping of Type 2 DMRS;

[0080] FIG3 is a schematic diagram of a method for implementing code division multiplexing;

[0081] FIG4 is a schematic diagram of an association relationship between a PTRS port and a DMRS port according to an embodiment of the present application;

[0082] FIG5 is a second schematic diagram of an association relationship between a PTRS port and a DMRS port provided in an embodiment of the present application;

[0083] FIG6 is a third schematic diagram of an association relationship between a PTRS port and a DMRS port provided in an embodiment of the present application;

[0084] FIG7 is a fourth schematic diagram of an association relationship between a PTRS port and a DMRS port provided in an embodiment of the present application;

[0085] FIG8 is a fifth schematic diagram of an association relationship between a PTRS port and a DMRS port provided in an embodiment of the present application;

[0086] FIG9 is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0087] FIG10 is a flow chart of a communication method provided in an embodiment of the present application;

[0088] FIG11 is a first schematic diagram of time-frequency resources occupied by PTRS0 and PTRS1 provided in an embodiment of the present application;

[0089] FIG12 is a second schematic diagram of time-frequency resources occupied by PTRS0 and PTRS1 provided in an embodiment of the present application;

[0090] FIG13 is a third schematic diagram of time-frequency resources occupied by PTRS0 and PTRS1 provided in an embodiment of the present application;

[0091] FIG14 is a first structural diagram of a communication device provided in an embodiment of the present application;

[0092] FIG15 is a second structural diagram of the communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0093] For ease of understanding, the technical terms involved in the embodiments of this application are first introduced below.

[0094] 1.DMRS

[0095] DMRS can be used to estimate the equivalent channel matrix experienced by a data channel, such as a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), or a control channel, such as a physical downlink control channel (PUSCH), for data detection and demodulation.

[0096] Taking the data channel PDSCH as an example, DMRS is usually precoded in the same way as the transmitted data signal, ensuring that DMRS and data experience the same equivalent channel. Assuming that the DMRS vector sent by the transmitter is s and the data symbol vector sent is x, and the DMRS and data undergo the same precoding operation (for example, multiplying by the same precoding matrix P), the corresponding received signal vector at the receiver can be expressed as:

[0097] Data signal: The value of the first scheduling PTRS port number is associated with the number of PTRS ports that actually send PTRS signals on each OFDM symbol; the value of the second scheduling PTRS port number is associated with the number of PTRS ports that actually send PTRS signals on each OFDM symbol; the PTRS signal includes the first PTRS and the second PTRS; the OFDM symbol is the OFDM symbol contained in the PUSCH.

[0098] Data signal:

[0099] That is, the equivalent channels experienced by the data signal and the reference signal (ie, DMRS) are Among them, the DMRS vector s is known, so the receiving end can obtain the equivalent channel based on the DMRS vector s. For example, the equivalent channel is estimated by using the least square (LS) channel estimation algorithm or the minimum mean square error (MMSE) channel estimation algorithm. The estimation of the equivalent channel Complete the multiple input and multiple output (MIMO) equalization and subsequent demodulation of the data signal.

[0100] DMRS is used to estimate the equivalent channel Its dimensions are NR×R, where NR is the number of receive antennas and R is the number of transmission streams (also known as the number of transmission layers, spatial layers, or transmission rank). Generally speaking, one DMRS port corresponds to one spatial layer, that is, one DMRS port corresponds to one transmission stream. Therefore, for MIMO transmission with R transmission streams, the required number of DMRS ports is R. To ensure the quality of channel estimation, different DMRS ports are usually orthogonal. For example, the DMRS corresponding to different DMRS ports are orthogonal in the frequency domain, time-frequency domain, or code domain to avoid interference between different DMRS ports.

[0101] To reduce mutual interference, the DMRSs corresponding to multiple DMRS ports are often mapped to preset time-frequency resources through frequency division multiplexing, time division multiplexing, or code division multiplexing. Currently, 5G NR supports two DMRS configuration types: Type 1 DMRS configuration supports up to 8 orthogonal ports; Type 2 DMRS configuration supports up to 12 orthogonal ports.

[0102] For a DMRS port, in order to perform channel estimation on different time-frequency resources and ensure the quality of channel estimation, multiple DMRS need to be sent in multiple time-frequency resources. DMRS can occupy at least one orthogonal frequency division multiplexing (OFDM) symbol in the time domain, and the bandwidth occupied in the frequency domain is the same as the scheduling bandwidth of the scheduled data signal. The multiple DMRSs corresponding to a DMRS port correspond to a reference signal sequence, and a reference signal sequence can include multiple reference signal sequence elements. The reference signal sequence corresponding to DMRS can be a gold sequence or a Walsh sequence. Taking the reference signal sequence corresponding to DMRS as a gold sequence as an example, the nth element in the reference signal sequence can be generated by the following formula:

[0103] The pseudo-random sequence c(n) can be a gold sequence with a sequence length of 31. For a sequence c(n) with an output length of MPN, n = 0, 1, ..., MPN-1, it can be defined as: c(n) = (x1(n+N C )+x2(n+N C))mod 2 x1(n+31)=(x1(n+3)+x1(n))mod 2 x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod 2

[0104] Among them, N C = 1600. The first m sequence x1(n) can be initialized to x1(0) = 1, x1(n) = 0, n = 1, 2, ..., 30. The second m sequence x2(n) is initialized by the parameter c init Initialize.c init It can be defined as:

[0105] Among them, l is the OFDM symbol index contained in a time slot, is the time slot index within a system frame, Can be configured by higher-layer signaling. Related to the cell ID (identification), which can usually be equal to the cell Right now It is an initialization parameter, and its value can be 0 or 1. The specific determination formula is as follows:

[0106] Here, λ is the code division multiplexing (CDM) group index corresponding to the DMRS port. For adjacent DMRS frequency domain positions, different In order to achieve the effect of reducing the peak to average power ratio (PAPR). When the DMRS sequence initialization indication field is configured in the downlink control information (DCI), the DCI can be used to indicate n SCID ∈{0, 1}, otherwise n SCID The default value can be 0.

[0107] It should be understood that the reference signal sequence corresponding to a DMRS port can be mapped to the corresponding time-frequency resource after being multiplied by the corresponding mask sequence according to a preset time-frequency resource mapping rule.

[0108] For example, for DMRS port p, the mth reference sequence element r(m) in the corresponding reference signal sequence can be mapped to the index (k, l) according to the following mapping rules: p,μ On the resource element (RE), where the index is (k, l) p,μThe RE of corresponds to the OFDM symbol with index l in a time slot in the time domain and to the subcarrier with index k in the frequency domain. The mapping rules satisfy: k'=0,1; n=0,1,…; l'=0,1;

[0109] Where p is the index of the DMRS port, μ is the subcarrier spacing parameter, To map to index (k,l) p,μ The DMRS modulation symbol corresponding to the DMRS port p on the RE, l' is the symbol index of the starting OFDM symbol occupied by the DMRS modulation symbol or the symbol index of the reference OFDM symbol, is the power scaling factor, w t (l') is the time domain mask element corresponding to the OFDM symbol indexed as l', w f (k') is the frequency domain mask element corresponding to the subcarrier indexed by k', m=2n+k', and Δ is the subcarrier offset factor.

[0110] In the NR protocol, two types of DMRS configurations are defined, namely, Type 1 DMRS and Type 2 DMRS. In the mapping rule of Type 1 DMRS, the DMRS port p corresponds to w f (k'), w t The values ​​of (l') and Δ can be determined according to Table 1.

[0111] Table 1

[0112] Here, λ is the index of the code division multiplexing group (also called orthogonal multiplexing group) to which the DMRS port p belongs, and the DMRS ports in the same orthogonal multiplexing group occupy the same time-frequency resources.

[0113] According to formula (1), Figure 1 is a schematic diagram of the time-frequency resource mapping of Type 1 DMRS. As shown in Figure 1, for single-symbol DMRS (corresponding to l'=0), the DMRS resource occupies one OFDM symbol and supports a maximum of 4 DMRS ports. The 4 DMRS ports are divided into 2 code division multiplexing groups (CDM groups), for example, they can be divided into CDM group 0 and CDM group 1. CDM group 0 contains DMRS port 0 and DMRS port 1; CDM group 1 contains DMRS port 2 and DMRS port 3. Among them, CDM group 0 and CDM group 1 are frequency division multiplexed (that is, mapped on different frequency domain resources). The DMRS ports contained in the CDM group are mapped on the same time-frequency resources. The reference signals corresponding to the DMRS ports contained in the CDM group are distinguished by orthogonal cover code (OCC) to ensure the orthogonality of the DMRS ports in the CDM group, thereby suppressing the interference between DMRS transmitted on different antenna ports.

[0114] Specifically, as shown in (a) of Figure 1, DMRS port 0 and DMRS port 1 are located in the same resource element (RE) and are mapped in a comb-tooth manner in the frequency domain. That is, the adjacent frequency domain resources occupied by DMRS port 0 and DMRS port 1 are separated by one subcarrier. For a DMRS port, the two adjacent REs occupied correspond to an OCC codeword sequence of length 2. For example, for subcarrier 0 and subcarrier 2, DMRS port 0 and DMRS port 1 use a set of OCC codeword sequences of length 2 (+1+1 and +1-1).

[0115] Similarly, DMRS port 2 and DMRS port 3 are located in the same RE and are mapped in a comb-tooth manner in the frequency domain to the REs unoccupied by DMRS port 0 and DMRS port 1. For subcarrier 1 and subcarrier 3, DMRS port 2 and DMRS port 3 use a set of OCC codeword sequences of length 2 (+1+1 and +1-1).

[0116] For dual-symbol DMRS, DMRS resources occupy two OFDM symbols, supporting a maximum of eight DMRS ports. The eight DMRS ports are divided into two code division multiplexing groups, for example, CDM group 0 and CDM group 1. CDM group 0 includes DMRS port 0, DMRS port 1, DMRS port 4, and DMRS port 5; CDM group 1 includes DMRS port 2, DMRS port 3, DMRS port 6, and DMRS port 7. CDM group 0 and CDM group 1 are frequency division multiplexed, and the reference signals corresponding to the DMRS ports included in the CDM group are distinguished by the OCC.

[0117] Specifically, as shown in (b) of Figure 1, DMRS port 0, DMRS port 1, DMRS port 4, and DMRS port 5 are located in the same RE and are resource mapped in a comb-tooth manner in the frequency domain, that is, the adjacent frequency domain resources occupied by DMRS port 0, DMRS port 1, DMRS port 4, and DMRS port 5 are separated by one subcarrier. For one DMRS port, the two adjacent subcarriers and two OFDM symbols occupied correspond to an OCC codeword sequence of length 4. For example, for subcarrier 0 and subcarrier 2 corresponding to OFDM symbol 1 and OFDM symbol 2, DMRS port 0, DMRS port 1, DMRS port 4, and DMRS port 5 can use a set of OCC codeword sequences of length 4 (+1+1+1+1 / +1+1-1-1 / +1-1+1-1 / +1-1-1+1).

[0118] Similarly, DMRS port 2, DMRS port 3, DMRS port 6, and DMRS port 7 are located in the same RE and are mapped in a comb-tooth manner in the frequency domain to the unoccupied subcarriers of DMRS port 0, DMRS port 1, DMRS port 4, and DMRS port 5. For subcarrier 1 and subcarrier 3 corresponding to OFDM symbol 1 and OFDM symbol 2, DMRS port 2, DMRS port 3, DMRS port 6, and DMRS port 7 can use a set of OCC codeword sequences with a length of 4 (+1+1+1+1 / +1+1-1-1 / +1-1+1-1 / +1-1-1+1).

[0119] In the Type 2 DMRS mapping rule, the DMRS port p corresponds to w f (k'), w t The values ​​of (l') and Δ can be determined according to Table 2.

[0120] Table 2

[0121] Here, λ is the index of the code division multiplexing group (also called orthogonal multiplexing group) to which the DMRS port p belongs, and the DMRS ports in the same orthogonal multiplexing group occupy the same time-frequency resources.

[0122] According to formula (1), Figure 2 is a schematic diagram of the time-frequency resource mapping of Type 2 DMRS. As shown in Figure 2, for a single-symbol Type 2 DMRS, the DMRS resource occupies one OFDM symbol and supports a maximum of 6 DMRS ports. The 6 DMRS ports are divided into 3 code division multiplexing groups (CDM groups), for example, they can be divided into CDM group 0, CDM group 1, and CDM group 2. Frequency division multiplexing is used between CDM groups (i.e., mapped on different frequency domain resources), that is, frequency division multiplexing is used between CDM group 0, CDM group 1, and CDM group 2. The reference signals corresponding to the DMRS ports included in the CDM group are mapped on the same time-frequency resources, and the reference signals corresponding to the DMRS ports included in the CDM group are orthogonalized by OCC. Among them, CDM group 0 includes DMRS port 0 and DMRS port 1; CDM group 1 includes DMRS port 2 and DMRS port 3; CDM group 2 includes DMRS port 4 and DMRS port 5. For a DMRS port, its corresponding DMRS reference signal is mapped in the frequency domain to multiple resource subblocks containing two consecutive subcarriers, and adjacent resource subblocks are spaced four subcarriers apart in the frequency domain.

[0123] Specifically, as shown in (a) of Figure 2, DMRS port 0 and DMRS port 1 are located in the same RE and are resource mapped in a comb-tooth manner. For example, taking the frequency domain resource granularity of 1 resource block (RB) as an example, DMRS port 0 and DMRS port 1 occupy subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7, DMRS port 2 and DMRS port 3 occupy subcarrier 2, subcarrier 3, subcarrier 8, and subcarrier 9, and DMRS port 4 and DMRS port 5 occupy subcarrier 4, subcarrier 5, subcarrier 10, and subcarrier 11. For the two DMRS ports included in a CDM group, the corresponding OCC codeword sequences of length 2 (+1+1 and +1-1) are in the two adjacent subcarriers.

[0124] For dual-symbol Type 2 DMRS, DMRS resources occupy two OFDM symbols and support a maximum of 12 DMRS ports. The 12 DMRS ports are divided into three CDM groups, for example, CDM group 0, CDM group 1, and CDM group 2. Frequency division multiplexing is used between CDM groups, that is, frequency division multiplexing is used between CDM group 0, CDM group 1, and CDM group 2. The reference signals corresponding to the DMRS ports included in the CDM group are mapped to the same time-frequency resources, and the orthogonality of the reference signals corresponding to the DMRS ports included in the CDM is ensured by the OCC. Among them, CDM group 0 can include DMRS port 0, DMRS port 1, DMRS port 6, and DMRS port 7; CDM group 1 can include DMRS port 2, DMRS port 3, DMRS port 8, and DMRS port 9; CDM group 2 can include DMRS port 4, DMRS port 5, DMRS port 10, and DMRS port 11. For a DMRS port, its corresponding DMRS reference signal is mapped in the frequency domain to multiple resource subblocks containing two consecutive subcarriers, and adjacent resource subblocks are spaced four subcarriers apart in the frequency domain.

[0125] Specifically, as shown in (b) of Figure 2, the DMRS ports contained in a CDM group are located in the same RE and are resource mapped in a comb-tooth manner in the frequency domain. For example, taking the frequency domain resource granularity of 1RB as an example, DMRS port 0, DMRS port 1, DMRS port 6, and DMRS port 7 occupy subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7 corresponding to OFDM symbol 1 and OFDM symbol 2. DMRS port 2, DMRS port 3, DMRS port 8, and DMRS port 9 occupy subcarrier 2, subcarrier 3, subcarrier 8, and subcarrier 9 corresponding to OFDM symbol 1 and OFDM symbol 2. DMRS port 4, DMRS port 5, DMRS port 10, and DMRS port 11 occupy subcarrier 4, subcarrier 5, subcarrier 10, and subcarrier 11 corresponding to OFDM symbol 1 and OFDM symbol 2. For the four DMRS ports included in a CDM group, an OCC codeword sequence of length 4 (+1+1+1+1 / +1+1-1-1 / +1-1+1-1 / +1-1-1+1) corresponds to the two adjacent subcarriers corresponding to the two OFDM symbols.

[0126] In the current R18 DMRS topic discussion, code division multiplexing expansion methods have been supported to meet the higher transmission stream number requirements in actual scenarios. Figure 3 is a schematic diagram of a code division multiplexing implementation method. As shown in Figure 3, the schematic diagram uses a single-symbol Type 2 DMRS and a frequency domain resource granularity of 1RB as an example for illustrative purposes. It should be understood that other DMRS configuration types, namely dual-symbol Type 2 DMRS, single-symbol Type 1 DMRS, and dual-symbol Type 1 DMRS, can refer to this method to expand the DMRS port. Among them, P is used to represent the DMRS port in Figure 3. As shown in (a) of Figure 3, for single-symbol Type 2 DMRS, a maximum of 6 DMRS ports are supported, and the 6 DMRS ports are divided into 3 CDM groups, for example, they can be divided into CDM group 0, CDM group 1, and CDM group 2. Among them, CDM group 0 may include DMRS port 0 and DMRS port 1; CDM group 1 may include DMRS port 2 and DMRS port 3; CDM group 2 may include DMRS port 4 and DMRS port 5.

[0127] As shown in Figure 3(a), for CDM group 0, that is, for DMRS port 0 and DMRS port 1, the subcarrier index (Re) occupied within an RB can be {0, 1, 6, 7}. As shown in Figure 3(c), the frequency domain mask sequence corresponding to DMRS port 0 can be {+1, +1, +1, +1}, and the frequency domain mask sequence corresponding to DMRS port 1 can be {+1, -1, +1, -1}. DMRS port 1 and DMRS port 0 occupy the same time-frequency resources and are transmitted on the same time-frequency resources as DMRS port 0 through code division orthogonality.

[0128] As shown in (b) of Figure 3, for the same CDM group, a group of DMRS ports (i.e., two DMRS ports) can be multiplexed through code division multiplexing within the same time-frequency resource to expand the number of DMRS ports. For example, for CDM group 0, DMRS port 6 and DMRS port 7 can be multiplexed through code division multiplexing, and the subcarrier indexes occupied by DMRS port 6 and DMRS port 7 within one RB can be {0, 1, 6, 7}. As shown in (d) of Figure 3, the frequency domain mask sequence corresponding to DMRS port 6 is {+1, +1, -1, -1}, and the frequency domain mask sequence corresponding to DMRS port 7 can be {+1, -1, -1, +1}. It should be understood that the multiplexing method of the remaining CDM groups is similar. For example, CDM group 1 can multiplex DMRS port 8 and DMRS port 9 through code division multiplexing, and CDM group 2 can multiplex DMRS port 10 and DMRS port 11 through code division multiplexing, thereby doubling the total number of DMRS ports multiplexed within the same time-frequency resource.

[0129] The time-frequency resource mapping formula of the R18 DMRS port satisfies: k′=0,1,2,3; n=0,1,…; j=0,1,…,υ-1;

[0130] Among them, p j is the index of the DMRS port, μ is the subcarrier spacing parameter, is the DMRS symbol corresponding to the DMRS port p on the RE with index (k, l), is the power factor, w t (l') is the time domain mask sequence element corresponding to the time domain symbol indexed as l', w f (k') is the frequency domain mask sequence element corresponding to the subcarrier indexed by k'. Δ is the subcarrier offset factor, It is the symbol index of the starting time domain symbol occupied by the DMRS symbol or the symbol index of the reference time domain symbol.

[0131] It should be noted that according to the code division multiplexing expansion shown in FIG3, the DMRS port p corresponds to w f (k'), w t The values ​​of (l') and Δ can be determined according to Tables 3 to 6 below.

[0132] Table 3 shows the w corresponding to the DMRS port p in the mapping rule of Type 1 DMRS when the reference signal sequence corresponding to the DMRS is the gold sequence. f (k'), w t(l') and the expansion of the value of Δ, that is, Table 3 can be an expansion of the above Table 1. Table 4 shows the w corresponding to the DMRS port p in the mapping rule of Type 2 DMRS when the reference signal sequence corresponding to the DMRS is a gold sequence. f (k'), w t (l') and the value of Δ, that is, Table 4 can be an extension of the above Table 2. Table 5 shows the w corresponding to the DMRS port p in the mapping rule of Type 1 DMRS when the reference signal sequence corresponding to the DMRS is a Walsh sequence. f (k'), w t Table 6 shows the w corresponding to DMRS port p in the mapping rule of Type 2 DMRS when the reference signal sequence corresponding to DMRS is Walsh sequence. f (k'), w t (l') and the complement of the value of Δ.

[0133] Table 3

[0134] Table 4

[0135] Table 5

[0136] Table 6

[0137] For uplink transmissions with more than 4 PUSCH ports and more than 4 transmission streams, the network device may also set the corresponding DMRS port indication to determine the DMRS ports corresponding to the precoding matrix according to the DMRS port indication, thereby determining the candidate DMRS port index corresponding to the PTRS port. For example, for a single-symbol Type 1 DMRS, when the transmit precoding matrix is ​​disabled (transform precoder is disabled), the maximum length maxLength = 1, the number of transmission streams is 5, and the number of DMRS CDM groups without data (i.e., Number of DMRS CDM group(s)without data) is 2, the network device may set the DMRS port indication shown in Table 7 below:

[0138] Table 7

[0139] For example, for a single-symbol Type 1 DMRS, when the transmit precoding matrix is ​​disabled, maxLength = 2, the number of transmission streams is 6, and the number of DMRS CDM groups without data is 2, the network device may set the DMRS port indication shown in Table 8 below:

[0140] Table 8

[0141] For example, for a single-symbol Type 1 DMRS, when the transmit precoding matrix is ​​disabled, maxLength = 2, the number of transmission streams is 7, and the number of DMRS CDM groups without data is 2, the network device may set the DMRS port indication shown in Table 9 below:

[0142] Table 9

[0143] For example, for a single-symbol Type 1 DMRS, when the transmit precoding matrix is ​​disabled, maxLength = 2, the number of transmission streams is 8, and the number of DMRS CDM groups without data is 2, the network device may set the DMRS port indication shown in Table 10 below:

[0144] Table 10

[0145] For example, for a single-symbol Type 2 DMRS, when the transmit precoding matrix is ​​disabled, maxLength = 2, the number of transmission streams is 5, the number of DMRS CDM groups without data is 2, and the number of front-load DMRS occupancy (ie, the number of front-load symbols) is 1, the network device can set the DMRS port indication shown in Table 11 below:

[0146] Table 11

[0147] For example, for a single-symbol Type 2 DMRS, when the transmit precoding matrix is ​​disabled, maxLength = 2, the number of transmission streams is 6, the number of DMRS CDM groups without data is 2, and the number of pre-DMRS occupied is 1, the network device can set the DMRS port indication shown in Table 12 below:

[0148] Table 12

[0149] For example, for a single-symbol Type 2 DMRS, when the transmit precoding matrix is ​​disabled, maxLength = 2, the number of transmission streams is 7, the number of DMRS CDM groups without data is 2, and the number of pre-DMRS occupied is 1, the network device can set the DMRS port indication shown in Table 13 below:

[0150] Table 13

[0151] For example, for a single-symbol Type 2 DMRS, when the transmit precoding matrix is ​​disabled, maxLength = 2, the number of transmission streams is 8, the number of DMRS CDM groups without data is 2, and the number of pre-DMRS occupied is 1, the network device can set the DMRS port indication shown in Table 14 below:

[0152] Table 14

[0153] 2.PTRS

[0154] The phase tracking reference signal is a reference signal used by the receiver to measure phase noise and estimate frequency domain offset.

[0155] The base sequence generation of PTRS is the same as that of DMRS. The time-frequency resource mapping of PTRS is as follows:

[0156] Among them, r k is the kth element in the reference signal sequence corresponding to PTRS. The generation method of the reference signal sequence corresponding to PTRS is consistent with the generation method of the reference signal sequence corresponding to DMRS.

[0157] For PUSCH transmission, PTRS time-frequency resource mapping can also be as follows:

[0158] This includes the following situations:

[0159] l is the OFDM symbol allocated for PUSCH transmission;

[0160] RE(k, l) is not allocated to DMRS;

[0161] k'andΔ corresponding ports

[0162] For the above two PTRS time-frequency resource mappings, the base sequence r k It can be given as follows:

[0163] Among them, the antenna port or is the antenna port associated with the PTRS transmission determined according to Section 6.2.3 of 3GPP TS 38.214, and r(m) is the reference signal sequence generated in the background technology (formula r on page 7) orassociated with PT-RS transmission are given by clause 6.2.3 of[6,TS 38.214]; r(m)is given by clause 6.4.1.1.1.1.

[0164] Among them, the power coefficient β PTRS The value of satisfies the following power coefficient determination table 21 and the corresponding power coefficient determination method.

[0165] The specific time-frequency resource position value (k, l) can be determined by the following steps.

[0166] Specifically, the time domain position l corresponding to the PTRS can be determined according to the following steps:

[0167] Step 1: Set i=0,l ref =0;

[0168] Step 2: If max(l ref +(i-1)L PT-RS +1,l ref ) to l ref +iL PT-RS If any symbol in the interval overlaps with the DMRS symbol, set i = 1. If it is a single-symbol DMRS, set l ref The symbol index of DMRS. If it is a dual-symbol DMRS, set l ref is the index of the second symbol of DMRS. ref +iL PT-RS In the symbols allocated for PDSCH, repeat from step 2. PT-RS is the time domain density of PTRS.

[0169] Step 3: Put l ref +iL PT-RS Added to the PTRS time domain index set.

[0170] Step 4: Just ref +iL PT-RS The process is repeated from step 2 in the symbols allocated for the PDSCH.

[0171] That is to say, the range of the PTRS time domain can start from the first symbol of the scheduled PDSCH, avoiding the location of the DMRS, and ending at L PT-RS The density is L until the end of PDSCH. PT-RS The value of can be determined according to the following Table 15. MCSL is the modulation and coding scheme (MCS) of the current scheduling, ptrs-MCS1, ptrs-MCS2, ptrs-MCS3 and ptrs-MCS4 are the MCS threshold ranges configured by the higher layer. PT-RS The density of PTRS in the time domain, that is, the symbol interval at which PTRS appears in a time slot. A value of 1 indicates that PTRS is sent in each time domain OFDM symbol.

[0172] Table 15

[0173] The value of the frequency domain position k corresponding to PTRS can be determined according to the following formula:

[0174] Wherein, i is the resource block (RB) offset where PTRS exists, and i=0, 1, 2, .... RNTI It is the value of the radio network temporary indertifier (RNTI) corresponding to the DCI scheduling. RB K is the number of RBs scheduled at that time. PT-RS is the frequency domain density of PTRS (i.e. RB density), and K PT-RS ∈{2,4}, that is, K PT-RS The density of PTRS in the frequency domain indicates the RB interval of PTRS in a scheduling bandwidth. When the value is 2, it means that PTRS is sent once in every two frequency domain RBs. PT-RS The value of can be determined according to the following Table 16. RB0 、N RB1 RB threshold range configured for the higher layer.

[0175] Table 16

[0176] in, It is the subcarrier offset corresponding to the DMRS port associated with the PTRS port in each RB where the PTRS exists. For example, for Type 1 DMRS, when the candidate DMRS ports corresponding to the PTRS port include DMRS port 0, DMRS port 1, DMRS port 2 and DMRS port 3; for Type 2 DMRS, when the candidate DMRS ports corresponding to the PTRS port include DMRS port 0, DMRS port 1, DMRS port 2, DMRS port 3, DMRS port 4 and DMRS port 5, it can be determined according to the following Table 17 The option column corresponding to the resource element offset (resoureceElementOffset) of the current scheduling can be determined by the field in the high-level parameter "Phase Tracking Reference Signal-Downlink Configuration (PTRS-DownlinkConfig)". If there is no such field in the high-level parameter, the default value can be the value in "offset00".

[0177] Table 17

[0178] 3. Association between PTRS ports and DMRS ports for 4T4 flows

[0179] The current NR protocol specifies that the PTRS port can be bound to a candidate DMRS port, and the association relationship between the PTRS port and the DMRS port can be indicated by the Phase Tracking Reference Signal-Demodulation Reference Signal Association (PTRS-DMRS association) field in the DCI. There are two possibilities for this indication: 0 or 2 bits. Among them, PTRS-DMRS association is 0bit, indicating that the PTRS-UplinkConfig field does not exist, or maxRank=1, which means that there is no PTRS port configured or there is only one candidate DMRS port, so there is no need to bind the PTRS port to the DMRS port. When PTRS-DMRS association is 2bit, the PTRS-DMRS binding relationship can be selected according to the maximum number of PTRS ports configured in the PTRS-UplinkConfig field.

[0180] Specifically, when the maximum number of PTRS ports is 1, the DMRS port index bound to the PTRS port (e.g., PTRS port 0) can be determined according to the following Table 18. That is, when the number of PTRS ports is 1, one of the maximum 4 candidate DMRS ports (i.e., scheduled DMRS ports) can be indicated by the PTRS-DMRS association field as the DMRS port index bound to PTRS port 0.

[0181] Table 18

[0182] For example, when it is determined according to the indication of DCI signaling that the candidate DMRS ports corresponding to the PTRS port include DMRS port 0, DMRS port 1, DMRS port 2, and DMRS port 3, if the PTRS-DMRS association field indicates that the Value is 2, it means that PTRS port 0 is bound to the third candidate DMRS port (i.e., the third scheduled DMRS port), that is, DMRS port 2 is the DMRS port bound to PTRS port 0. If the PTRS-DMRS association field indicates that the Value is 3, it means that PTRS port 0 is bound to the fourth candidate DMRS port, that is, DMRS port 3 is the DMRS port bound to PTRS port 0. The value of Value can be indicated by DCI signaling.

[0183] When the maximum number of PTRS ports is 2, the DMRS port index bound to the PTRS port (i.e., PTRS port 0 and PTRS port 1) can be determined according to the following Table 19. That is, when the number of PTRS ports is 2, one of the maximum two candidate DMRS ports can be indicated as the DMRS port index bound to PTRS port 0 or the DMRS port index bound to PTRS port 1.

[0184] Table 19

[0185] Among them, the most significant bit (MSB) of the PTRS-DMRS association field can be used to indicate the DMRS port sharing PTRS port 0; the least significant bit (LSB) of the PTRS-DMRS association field can be used to indicate the DMRS port sharing PTRS port 1.

[0186] It should be understood that the MSB of the PTRS-DMRS association field can also be used to indicate the DMRS port sharing PTRS port 1; the LSB of the PTRS-DMRS association field can also be used to indicate the DMRS port sharing PTRS port 0.

[0187] For example, when it is determined according to the indication of the DCI signaling that the candidate DMRS ports corresponding to the PTRS port include DMRS port 0, DMRS port 1, DMRS port 2, and DMRS port 3 in sequence, if the Value of MSB is 1, it means that PTRS port 0 is bound to the second candidate DMRS port in the high order, that is, DMRS port 2 is the DMRS port bound to PTRS port 0. If the Value of LSB is 1, it means that PTRS port 1 is bound to the second candidate DMRS port in the low order, that is, DMRS port 3 is the DMRS port bound to PTRS port 1.

[0188] Among them, the configuration scenario with 2 PTRS ports generally appears in partially coherent and non-coherent uplink codebook transmission (UL Codebook baased transmission), and the configuration with 1 PTRS port generally appears in fully coherent uplink codebook transmission. Among them, full coherence means that all antenna ports (i.e., PUSCH ports) can send the same stream data. Partial coherence means that some antenna ports (i.e., antenna ports in the same coherent antenna group) can send the same stream data. Non-coherence means that each antenna port can only send one stream of data. The non-zero elements contained in a column in the partially coherent codebook correspond to the same coherent antenna group. A column in the non-coherent codebook contains only one non-zero element.

[0189] For partially coherent and incoherent uplink codebook transmission, the actual number of PTRS ports transmitted depends on the uplink precoding matrix indication (TPMI) and the maximum number of transmission streams. For example, for partially coherent and incoherent antenna configurations, PUSCH port 0 and PUSCH port 2 can share PTRS port 0, and PUSCH port 1 and PUSCH port 3 can share PTRS port 1 (it can be understood that this determines the mapping of PUSCH port to PTRS port, and on which PUSCH port PTRS is sent). At the same time, PTRS port 0 can be bound to the uplink "x" stream (i.e., DMRS port x), and PTRS port 1 can be bound to the uplink "y" stream (i.e., DMRS port y). Among them, x and y can be determined according to the above Table 18 (i.e., they can be indicated by DCI).

[0190] The network device can configure the codebook subset through radio resource control (RRC) signaling. When the codebook subset is limited to FullyAndPartialAndNonCoherent, the uplink codebook subset is all codebooks whose number of transmission streams is not greater than the maximum number of transmission streams; when the codebook subset is limited to PartialAndNonCoherent, the uplink codebook subset is all partially coherent codebooks and non-coherent codebooks whose number of transmission streams is not greater than the maximum number of transmission streams; when the codebook subset is limited to NonCoherent, the uplink codebook subset is all non-coherent codebooks whose number of transmission streams is not greater than the maximum number of transmission streams. It should be understood that DCI signaling can indicate the corresponding number of transmission streams and TPMI index (i.e., precoding matrix index), and each transmission stream number and TPMI index corresponds to a precoding matrix for PUSCH transmitted based on the codebook.

[0191] For example, for 4-stream PUSCH transmission, Table 20 shows the precoding matrix W used when 4 antenna ports perform four-layer transmission. This TPMI set corresponds to uplink 4-stream transmission under 4 transmit antennas. The precoding matrix (W) corresponding to codebook 0 (i.e., TPMI index = 0) can be understood as non-coherent transmission, the precoding matrices corresponding to codebook 1 (i.e., TPMI index = 1) and codebook 2 (i.e., TPMI index = 2) can be understood as partially coherent transmission, and the precoding matrices corresponding to codebook 3 (i.e., TPMI index = 3) and codebook 4 (i.e., TPMI index = 4) can be understood as fully coherent transmission. For the uplink codebook of 4 transmissions and 4 streams (i.e., uplink 4-stream transmission under 4 transmit antennas), a row of the codebook corresponds to a PUSCH antenna port (which can also be understood as a sounding reference signal (SRS) port), and a column of the codebook corresponds to an uplink transmission stream (which can also be understood as a DMRS port).

[0192] Table 20

[0193] As mentioned above, NR supports up to 4 uplink stream transmissions per terminal.

[0194] 4. Each resource element (RE) per layer

[0195] Power factor of PUSCH to PTRS per layer and per RE It refers to the ratio of the power of a PUSCH transmission layer to the power of a PTRS port on each layer and each RE.

[0196] The power factor can be in the linear domain. For example, the transmit power of the uplink transmission layer corresponding to a PTRS port is 1 / 4 of the total power of all uplink transmission layers. The linear domain can be understood as the power of a PUSCH transmission layer for a PTRS port is 4 times.

[0197] The power factor can also be expressed in dB. For example, the transmit power of the uplink transmission layer corresponding to a PTRS port is 1 / 4 of the total power of all uplink transmission layers. In dB, the power of a PUSCH transmission layer for a PTRS port is 6 dB.

[0198] The existing protocol specifies the power factor of PUSCH to PTRS per RE per layer for 4T and below, and 4 layers and below:

[0199] When the UE is scheduled with Qp={1,2} PTRS ports in the uplink, and the number of uplink scheduling layers / PUSCH layers is hour:

[0200] 1) If the UE is configured with the higher-level parameter ptrs-Power (carried in the higher-level signaling phase tracking reference signal - uplink configuration (PTRS-UplinkConfig)), the power factor of the PUSCH to PTRS per layer per RE is From this we can conclude that: in According to the following table 21, the high-level parameter ptrs-Power determines which row in Table 21 is selected (corresponding to different power factor assumptions); PTRS coefficient factor β PTRS Depend on The DCI is used to indicate the precoding information and number of layers in Table 21.

[0201] 2) When there is no ptrs-Power field in the higher layer configuration PTRS-UplinkConfig or PUSCH is transmitted based on non-codebook, the UE shall assume that ptrs-Power is set to state '00'.

[0202] Table 21

[0203] It can be understood that for the specific introduction in Table 21 above, reference can be made to the relevant introduction of the technical standard (TS) 38.214 6.2.3 UE PTRS transmission part, which will not be repeated here. For scenarios with multiple PTRS ports, take the following Table 22 as an example. The vertical axis corresponds to the subcarrier identifier, and the horizontal axis corresponds to the number of continuous OFDM symbols of PUSCH. The blank position can be understood as sending uplink data signals. Assume that the precoding used for its PUSCH transmission is the precoding matrix corresponding to TPMI index = 0 in Table 9, and assume that the DMRS port indications corresponding to the uplink 4 transmission layers are {0, 1, 12, 13}, where 12 and 13 are DMRS ports newly added to the protocol. The DMRS port indication method can refer to the relevant introduction in the technical terminology.

[0204] FIG4 is a schematic diagram of an example of an association between a PTRS port and a DMRS port according to an embodiment of the present application. As shown in FIG4 , PUSCH ports 0 and 2 share PTRS port 0, and PUSCH ports 1 and 3 share PTRS port 1. When ptrs-Power is set to state '00', assuming that the 2-bit indication value for indicating the PTRS-DMRS association relationship is "01" (corresponding to Table 22 below), then for this scenario, the PTRS p0 corresponding to the first RE (subcarrier 6, symbol #3) in Table 21 is transmitted by PUSCH port 0, and its precoding and sequence are determined according to the precoding and sequence corresponding to DMRS port 0; in Table 22, the PTRS p1 corresponding to the second RE (subcarrier #7, symbol #3) is transmitted by PUSCH port 3, and its precoding and sequence are determined according to the precoding and sequence corresponding to DMRS port 13. It can be understood that corresponding to this scenario, DMRS ports 0 and 12 share PTRS p0, DMRS ports 1 and 13 share PTRS p1, the DMRS port associated with the PTRS is determined according to the indicated PTRS-DMRS association relationship, and the PTRS is sent according to the sequence and time-frequency resources corresponding to the DMRS port and the TPMI corresponding to the DMRS port.

[0205] At this time, since multiple PTRS ports are frequency-division multiplexed on the same OFDM symbol (PTRS p0 and PTRS p1 are frequency-division multiplexed on symbol #3 in Table 22), and the subcarriers occupied by the PTRS ports do not send PUSCH (subcarrier #6 and subcarrier #7 in Table 22 do not send PUSCH), the same PUSCH port, such as PUSCH port 0 in this example, neither sends data in the first RE nor in the second RE. Therefore, the transmission of PTRS p0 can "borrow" the transmission power of PUSCH port 0 on the second RE for power boosting. It can also be understood that the power factor of the PUSCH port for PTRS is 2 times on each layer and each RE, corresponding to a 3dB increase (3*2-3) when the Qp value in Table 22 is 2. Similarly, the power boost coefficient of PTRS port 1 is also 3dB at this time.

[0206] Table 22

[0207] 4. Association between PTRS port and DMRS port for uplink maximum 8T8 flow

[0208] With the continuous evolution of massive MIMO systems, the number of transmit and receive antennas will further increase (for example, the number of network equipment transmit antennas supports 128T or 256T, and the number of terminal equipment receive antennas supports 8R), so that a higher number of transmission streams can be further supported (for example, a maximum of 8 uplink streams). This will inevitably require more PTRS ports to support a higher number of transmission streams, that is, more than two PTRS ports are required. Among them, the PTRS port is generally bound to an associated DMRS port for PTRS transmission. Therefore, more DMRS ports will also be required to support a higher number of transmission streams. The following is a detailed introduction to the method of determining the association relationship between PTRS ports and DMRS ports in scenarios with more than 4 uplink PUSCH ports and more than 4 streams.

[0209] 1: The maximum number of PTRS ports supported by the terminal device.

[0210] Assuming that the number of PUSCH ports shared by a PTRS port is greater than or equal to the number of PUSCH ports corresponding to the first stream, it can be understood that when Ng = 2, the first stream data is sent by a maximum of 4 PUSCH ports, and a PTRS port can correspond to at least 4 PUSCH ports, that is, the maximum number of PTRS ports is <= 2. When Ng = 4, the first stream data is sent by a maximum of 2 PUSCH ports, and the maximum number of PTRS ports is <= 4. Therefore, the relationship between the number of coherent antenna groups Ng and the number of PTRS ports can be:

[0211] When Ng=1, the maximum number of PTRS ports is 1;

[0212] When Ng=2, the maximum number of PTRS ports is 2;

[0213] When Ng=4, the maximum number of PTRS ports is 4.

[0214] That is to say, one PTRS port can correspond to one or more Ng groups, and one Ng group can correspond to multiple PUSCH ports.

[0215] It is understood that this step may also be: the network device may send first information to the terminal device to configure the PTRS port for the terminal device according to the first information. The first information may be radio resource control (RRC) signaling, that is, the network device may configure the current number of PTRS ports of the terminal device through high-layer signaling, without limitation.

[0216] 2: The network device sends the association relationship between the PTRS port and the DMRS port to the terminal device.

[0217] After obtaining the maximum number of PTRS ports supported by the terminal device or the configured number of PTRS ports, the network device can determine the association between the PTRS port and the DMRS port based on the PTRS port number corresponding to the terminal device. The network device can notify the terminal device of the current PTRS port number and PTRS-DMRS association through high-layer signaling. The PTRS-DMRS association can include the following scenarios, which are described in detail below.

[0218] (1) Ng = 1, number of PTRS ports = 1.

[0219] The association relationship (hereinafter referred to as association relationship A) between a PTRS port and a DMRS port (which may be represented as DMRS port in Table 23, and DMRS port may be represented as DMRS port in the following tables) may be as shown in Table 23 below. That is, a PTRS port can have a maximum of 8 candidate DMRS ports. In other words, when Ng = 1 and the number of PTRS ports is 1, one of the maximum 8 candidate DMRS ports can be indicated as the DMRS port index bound to the PTRS port.

[0220] Table 23

[0221] (2) Ng = 2, number of PTRS ports = 2. When Ng = 2 and number of PTRS ports = 2, four PUSCH ports can share one PTRS port, and the association relationship between the PTRS port and the DMRS port (hereinafter referred to as association relationship B) can be as shown in Table 24 below. That is, one PTRS port can have a maximum of four candidate DMRS ports. In other words, when Ng = 2 and the number of PTRS ports is 2, one of the maximum four candidate DMRS ports can be indicated as the DMRS port index bound to the PTRS port (i.e., PTRS port 0 or PTRS port 1).

[0222] Table 24

[0223] Corresponding to the above-mentioned PTRS-DMRS association relationship, FIG5 shows a second schematic diagram of the association relationship between the PTRS port and the DMRS port provided in an embodiment of the present application. This schematic diagram takes the codebook corresponding to the above-mentioned Ng=2 as an example for illustrative purposes. It should be understood that a row of the codebook corresponds to a PUSCH port, and a column of the codebook corresponds to an uplink transmission stream, which can also be understood as a DMRS port. For the convenience of description in FIG5 , the DMRS ports including DMRS port 0, DMRS port 1, DMRS port 2, DMRS port 3, DMRS port 8, DMRS port 9, DMRS port 10 and DMRS port 11 are used as an example for illustrative purposes. That is, as shown in FIG5 , DMRS port 0, DMRS port 1, DMRS port 2 and DMRS port 3 are high-order DMRS ports, and DMRS port 8, DMRS port 9, DMRS port 10 and DMRS port 11 are low-order DMRS ports.

[0224] As shown in Figure 5, when the antenna ports in Ng0 include PUSCH port 0, PUSCH port 1, PUSCH port 2, and PUSCH port 3; and the antenna ports in Ng1 include PUSCH port 4, PUSCH port 5, PUSCH port 6, and PUSCH port 7, PTRS port 0 can be bound to Ng0, that is, the candidate DMRS ports corresponding to PTRS port 0 can include DMRS port 0, DMRS port 1, DMRS port 2, and DMRS port 3. PTRS port 1 can be bound to Ng1, that is, the candidate DMRS ports corresponding to PTRS port 1 can include DMRS port 8, DMRS port 9, DMRS port 10, and DMRS port 11.

[0225] Therefore, when the DCI indicates that the Value of MSB is 1, the candidate DMRS port index corresponding to PTRS port 0 is 2, that is, the DMRS port bound to PTRS port 0 is the second one among the high-order DMRS ports, that is, the DMRS port bound to PTRS port 0 is the second one among {DMRS port 0, DMRS port 1, DMRS port 2, DMRS port 3}, that is, the DMRS port bound to PTRS port 0 is DMRS port 1. Similarly, when the DCI indicates that the Value of LSB is 2, the candidate DMRS port index corresponding to PTRS port 1 is 3, that is, the DMRS port bound to PTRS port 1 is the third one among the low-order DMRS ports, that is, the DMRS port bound to PTRS port 1 is the third one among {DMRS port 8, DMRS port 9, DMRS port 10, DMRS port 11}, that is, the DMRS port bound to PTRS port 1 is DMRS port 10.

[0226] (3) Ng = 4, number of PTRS ports = 4.

[0227] When Ng = 4 and the number of PTRS ports is 4, two PUSCH ports can share one PTRS port. The association relationship between the PTRS port and the DMRS port (hereinafter referred to as association relationship C) can be as shown in Table 25 below. That is, a PTRS port can have a maximum of two candidate DMRS ports. In other words, when Ng = 4 and the number of PTRS ports is 4, one of the maximum two candidate DMRS ports can be indicated as the DMRS port index bound to the PTRS port (i.e., PTRS port 0, PTRS port 1, PTRS port 2, or PTRS port 3).

[0228] Table 25

[0229] FIG6 is a third schematic diagram of the association relationship between the PTRS port and the DMRS port provided in an embodiment of the present application. As shown in FIG6 , the schematic diagram takes the codebook corresponding to the above-mentioned Ng=4 as an example for exemplary explanation. Similarly, in FIG6 , for the convenience of description, the DMRS ports including DMRS port 0, DMRS port 1, DMRS port 2, DMRS port 3, DMRS port 8, DMRS port 9, DMRS port 10, and DMRS port 11 are taken as an example for exemplary explanation. That is, as shown in FIG6 , DMRS port 0 and DMRS port 1 are the first high-order DMRS ports, DMRS port 2 and DMRS port 3 are the second high-order DMRS ports, DMRS port 8 and DMRS port 9 are the first low-order DMRS ports, and DMRS port 10 and DMRS port 11 are the second low-order DMRS ports.

[0230] As shown in Figure 6, when the antenna ports in Ng0 include PUSCH port 0 and PUSCH port 1, the antenna ports in Ng1 include PUSCH port 2 and PUSCH port 3, the antenna ports in Ng2 include PUSCH port 4 and PUSCH port 5, and the antenna ports in Ng3 include PUSCH port 6 and PUSCH port 7, PTRS port 0 can be bound to Ng0, PTRS port 1 can be bound to Ng1, PTRS port 2 can be bound to Ng2, and PTRS port 3 can be bound to Ng3. In other words, the candidate DMRS ports corresponding to PTRS port 0 can include DMRS port 0 and DMRS port 1. The candidate DMRS ports corresponding to PTRS port 2 can include DMRS port 2 and DMRS port 3. The candidate DMRS ports corresponding to PTRS port 1 can include DMRS port 8 and DMRS port 9. The candidate DMRS ports corresponding to PTRS port 3 can include DMRS port 10 and DMRS port 11.

[0231] Therefore, when the DCI indicates that the Value of 1st MSB is 0, the candidate DMRS port index corresponding to PTRS port 0 is 1, that is, the DMRS port bound to PTRS port 0 is the first of the DMRS ports in the first high order, that is, the DMRS port bound to PTRS port 0 is the first in {DMRS port 0, DMRS port 1}, that is, the DMRS port bound to PTRS port 0 is DMRS port 0. Similarly, when the DCI indicates that the Value of 2nd LSB is 1, the candidate DMRS port index corresponding to PTRS port 3 is 2, that is, the DMRS port bound to PTRS port 3 is the second of the DMRS ports in the second low order, that is, the DMRS port bound to PTRS port 3 is the second in {DMRS port 10, DMRS port 11}, that is, the DMRS port bound to PTRS port 3 is DMRS port 11.

[0232] (4) Ng = 4, number of PTRS ports = 2.

[0233] It should be understood that when Ng=4, there is a possibility that there are only 2 PTRS ports. At this time, the binding relationship between the two groups of Ng can be determined, or the binding relationship between the PUSCH port and the PTRS port can be directly determined, so that a maximum of 4 PUSCH ports can share 1 PTRS port. Therefore, when Ng=4 and the number of PTRS ports=2, 4 PUSCH ports can share 1 PTRS port, and the association relationship between the PTRS port and the DMRS port (hereinafter referred to as the association relationship D) can be as shown in Table 26 below. That is, a PTRS port can have a maximum of 4 candidate DMRS ports. In other words, when Ng=4 and the number of PTRS ports is 2, one of the maximum 4 candidate DMRS ports can be indicated as the DMRS port index bound to the PTRS port (i.e., PTRS port 0 or PTRS port 1).

[0234] Table 26

[0235] FIG7 is a fourth schematic diagram of the association relationship between PTRS ports and DMRS ports provided in an embodiment of the present application. As shown in FIG7 , the schematic diagram uses the codebook corresponding to the above-mentioned Ng=4 as an example for exemplary description. Similarly, in FIG7 , for the convenience of description, the DMRS ports including DMRS port 0, DMRS port 1, DMRS port 2, DMRS port 3, DMRS port 8, DMRS port 9, DMRS port 10, and DMRS port 11 are used as an example for exemplary description. As shown in FIG7 , DMRS port 0, DMRS port 1, DMRS port 2, and DMRS port 3 are high-order DMRS ports, and DMRS port 8, DMRS port 9, DMRS port 10, and DMRS port 11 are low-order DMRS ports.

[0236] As shown in Figure 7, when Ng = 4 and the number of PTRS ports = 2, if the antenna ports in Ng0 include PUSCH port 0 and PUSCH port 1, the antenna ports in Ng1 include PUSCH port 2 and PUSCH port 3, the antenna ports in Ng2 include PUSCH port 4 and PUSCH port 5, and the antenna ports in Ng3 include PUSCH port 6 and PUSCH port 7, PTRS port 0 can be bound to Ng0 and Ng1, and PTRS port 1 can be bound to Ng2 and Ng3. That is, the candidate DMRS ports corresponding to PTRS port 0 may include DMRS port 0, DMRS port 1, DMRS port 2, and DMRS port 3. The candidate DMRS ports corresponding to PTRS port 1 may include DMRS port 8, DMRS port 8, DMRS port 10, and DMRS port 11.

[0237] Therefore, when the DCI indicates that the Value of MSB is 2, the candidate DMRS port index corresponding to PTRS port 0 is 3, that is, the DMRS port bound to PTRS port 0 is the third one among {DMRS port 0, DMRS port 1, DMRS port 2, DMRS port 3}, that is, the DMRS port bound to PTRS port 0 is DMRS port 2. Similarly, when the DCI indicates that the Value of LSB is 0, the candidate DMRS port index corresponding to PTRS port 1 is 1, that is, the DMRS port bound to PTRS port 1 is the first one among {DMRS port 8, DMRS port 9, DMRS port 10, DMRS port 11}, that is, the DMRS port bound to PTRS port 1 is DMRS port 8.

[0238] 3: The terminal device determines the candidate DMRS port index bound to the PTRS based on the received PTRS-DMRS association relationship indication, and determines the time-frequency resources and sequence sent by the PTRS based on the DMRS port index, the MCS scheduled at the time, and the number of RBs scheduled at the time.

[0239] It is understood that when the network device sends the association relationship between the PTRS port and the DMRS port to the terminal device, it can also send corresponding codeword information (such as MCS), precoding matrix index (TPMI) and transmission layer number indication information (number of layers), as well as DMRS port indication information to the terminal device. For example, the corresponding MCS, TPMI, transmission layer number indication information, and DMRS port indication information can be sent to the terminal device through the same DCI signaling.

[0240] The terminal device can determine the DMRS port index corresponding to the PTRS port based on the TPMI, the transmission layer number indication information, and the association between the PTRS port and the DMRS port. Subsequently, the terminal device can determine the DMRS port corresponding to the PTRS port based on the DMRS port index and the DMRS port indication information corresponding to the PTRS port, and can determine the time-frequency resources and sequence corresponding to the PTRS based on the DMRS port corresponding to the PTRS port, the MCS scheduled at the time, and the number of RBs scheduled at the time, thereby mapping and sending the PTRS based on the time-frequency resources and sequence corresponding to the PTRS.

[0241] Specifically, the terminal device can determine the time-frequency resources and sequence corresponding to the PTRS according to the aforementioned PTRS time-frequency resource mapping method, that is, according to To determine the time-frequency resources and sequence corresponding to PTRS, and to map and send PTRS according to the determined time-frequency resources and sequence corresponding to PTRS. It should be noted that after the DMRS port is expanded, The value of can be determined according to the following Table 27.

[0242] Table 27

[0243] 4: The terminal device sends PTRS according to the time-frequency resources and sequence mapping corresponding to the determined PTRS port.

[0244] It should be noted that for uplink transmissions with more than four PUSCH ports and more than four transmission streams, two codewords (CWs) may exist. When two CWs exist, the network device can determine the CW with a larger or stronger MCS based on the MCS corresponding to each CW, and determine the association between the PTRS port corresponding to the CW and the DMRS port, thereby reducing the number of candidate DMRS ports from a maximum of 8 to a maximum of 4, thereby reducing the DCI indication overhead.

[0245] When the MCSs corresponding to two CWs are equal, the association relationship between the PTRS port and the DMRS port can be determined based on the default CW. The default CW is the codeword with the smallest serial number. Since the DMRS port corresponding to the CW may only be a candidate DMRS port associated with a PTRS port, it may cause at least one PTRS port to be unable to accurately determine the associated DMRS port through the association table. For the DMRS port that cannot be accurately determined to be associated through the association table, a default DMRS port among the candidate DMRS ports that can be associated with another PTRS port is bound to the PTRS port through the default rule. For example, the default rule may be "DMRS port with the smallest DMRS port number".

[0246] For example, Figure 8 is a schematic diagram 5 of the association relationship between the PTRS port and the DMRS port provided in an embodiment of the present application. As shown in Figure 8, the codebook A corresponding to the 8-transmission 8-stream transmission includes two codebooks CW0 and CW1. CW0 and CW1 each correspond to only one PTRS port. For example, CW0 corresponds to columns 0 to 3 of codebook A, and CW1 corresponds to columns 4 to 7 of codebook A. CW0 corresponds to PTRS port 0, and CW1 corresponds to PTRS port 1. That is, the PUSCH port sent by the 4-layer transmission stream included in CW0 (i.e., PUCSH port 0 to PUCSH port 3) corresponds to PTRS port 0, and the PUSCH port sent by the 4-layer transmission stream included in CW1 (i.e., PUCSH port 4 to PUCSH port 7) corresponds to PTRS port 1. At this time, the association relationship between PTRS port 0 and the DMRS port can be determined according to the following Table 28.

[0247] Table 28

[0248] For Type 2 DMRS, if the DMRS ports scheduled by the DCI are {0, 1, 2, 3, 12, 13, 14, 15}, as shown in Figure 8, the candidate DMRS ports associated with PTRS port 0 may be {0, 1, 2, 3}. In this case, if the DCI indicates that the Value is 1, the DMRS port bound to PTRS port 0 may be the second of the candidate DMRS ports {0, 1, 2, 3}, that is, PTRS port 0 is bound to DMRS port 1. PTRS port 1 may determine the bound DMRS port according to a default rule. For example, the default rule may be to select the DMRS port with the smallest DMRS port number among the bindable DMRS ports. That is, the DMRS port bound to PTRS port 1 may be the DMRS port with the smallest port number among the DMRS ports {12, 13, 14, 15}. In other words, PTRS port 1 may be bound to DMRS port 12.

[0249] At this time, assuming that the high-level parameter resourceElementoffset field is configured as 'offset01', the terminal device can determine that the frequency domain resource position corresponding to PTRS port 0 is subcarrier #6 based on the binding relationship between PTRS port 0 and DMRS port 1. Similarly, the terminal device can determine that the frequency domain resource position corresponding to PTRS port 1 is subcarrier #7 based on the binding relationship between PTRS port 1 and DMRS port 12.

[0250] It can be understood that, as shown in Figure 8, CW0 can also correspond to the 0th, 1st, 6th and 7th columns of the codebook, and CW1 corresponds to the 2nd, 3rd, 4th and 5th columns of the codebook; or, CW0 can also correspond to the 0th, 1st, 2nd and 7th columns of the codebook, and CW1 can also correspond to the 3rd, 4th, 5th and 6th columns of the codebook, etc., without limitation.

[0251] However, when the MCSs corresponding to CW0 and CW1 are different, that is, when the two PTRS ports correspond to two different MCSs, how to determine the time domain densities corresponding to the two PTRS ports is a technical problem that needs to be solved urgently.

[0252] In summary, in response to the above technical problems, the embodiments of the present application propose the following technical solution to determine the time domain density corresponding to the two PTRS ports when the two PTRS ports correspond to two MCSs.

[0253] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0254] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as wireless fidelity (WiFi) systems, vehicle to everything (V2X) communication systems, device-to-device (D2D) communication systems, 4G, such as long-term evolution (LTE) systems, world-wide interoperability for microwave access (WiMAX) communication systems, 5G, such as new radio (NR) systems, and future communication systems.

[0255] This application will present various aspects, embodiments, or features in the context of systems that may include multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the figures. Furthermore, combinations of these aspects may also be used.

[0256] Additionally, in the embodiments of this application, words such as "exemplary" and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a concrete manner.

[0257] In the embodiments of the present application, "information", "signal", "message", "channel" and "signaling" can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings they intend to express are matched. "of", "corresponding, relevant" and "corresponding" can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings they intend to express are matched. In addition, the " / " mentioned in the present application can be used to represent an "or" relationship. It can be understood that in the present application, "indication" can include direct indication, indirect indication, explicit indication and implicit indication. When describing a certain indication information as being used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0258] In this application, the information indicated by the indication information is referred to as the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated, etc., or the information to be indicated can be indirectly indicated by indicating other information, wherein there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved with the help of the arrangement order of each information agreed in advance (such as specified in the protocol), thereby reducing the indication overhead to a certain extent.

[0259] The information to be indicated can be sent as a whole or divided into multiple sub-information and sent separately. The transmission period and / or transmission timing of these sub-information can be the same or different. The specific transmission method is not limited in this application. The transmission period and / or transmission timing of these sub-information can be predefined, for example, according to a protocol, or can be configured by the transmitting device through sending configuration information to the receiving device.

[0260] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0261] To facilitate understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application is first described in detail using the communication system shown in Figure 9 as an example. For example, Figure 9 is a schematic diagram of the architecture of a communication system applicable to the communication method provided in the embodiments of the present application.

[0262] As shown in FIG9 , the communication system mainly includes: network equipment and terminal equipment.

[0263] The terminal device may be one or more, such as a first terminal device, a second terminal device, a third terminal device, etc. The terminal device may be a terminal device with transceiver functions, or may be a chip or chip system provided in the terminal device. The terminal device may also be referred to as user equipment (UE), access terminal device, subscriber unit (subscriber unit), user station, mobile station (MS), mobile station, remote station, remote terminal device, mobile device, user terminal device, terminal device, wireless communication device, user agent, or user device. The terminal device in the embodiments of the present application can be a mobile phone, a cellular phone, a smart phone, a tablet computer, a wireless data card, a personal digital assistant (PDA), a wireless modem, a handheld device (handset), a laptop computer, a machine type communication (MTC) terminal device, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a smart home device (for example, a refrigerator, a television, an air conditioner, an electric meter, etc.), an intelligent robot, a robotic arm, a workshop equipment, a wireless terminal device in unmanned driving, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical care, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, a smart home, etc. The terminal device of the present application may also be a vehicle-mounted module, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit that is built into a vehicle as one or more components or units. The terminal device may also be other devices with terminal device functions, for example, the terminal device may also be a device that functions as a terminal device in D2D communication.

[0264] The embodiments of this application do not limit the form of the terminal device. The device used to implement the functions of the terminal device can be the terminal device; it can also be a device that supports the terminal device to implement the functions, such as a chip system. The device can be installed in the terminal device or used in conjunction with the terminal device. In the embodiments of this application, the chip system can be composed of a chip or include a chip and other discrete devices.

[0265] There may be multiple network devices, such as a first network device, a second network device, a third network device, and the like. The network device may be a device with wireless transceiver functions, or may be a chip or chip system provided on the device, located in the access network (AN) of the communication system, for providing access services to the terminal. For example, the network device may be referred to as a radio access network device (RAN), which may specifically be a next-generation mobile communication system, such as a 6G access network device, such as a 6G base station, or in the next-generation mobile communication system, the network device may also have other naming methods, which are all covered within the scope of protection of the embodiments of this application, and this application does not impose any limitation on this. Alternatively, the network device may include 5G, such as a gNB in ​​a new radio (NR) system, or one or a group of antenna panels (including multiple antenna panels) of a base station in 5G, or a network node constituting a gNB, a transmission and reception point (TRP or TP), or a transmission measurement function (TMF), such as a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), a radio unit (RU), an RSU with base station functions, a wired access gateway, or a 5G core network element. Alternatively, the network device may include an access point (AP) in a wireless fidelity (WiFi) system, a wireless relay node, a wireless backhaul node, various types of macro base stations, micro base stations (also known as small cells), relay stations, access points, wearable devices, vehicle-mounted devices, and the like.

[0266] Among them, the CU and DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU) or a remote radio head (RRH). It can be understood that the network device can be a CU node, a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into a network device in the access network RAN, or the CU can be divided into a network device in the core network CN, and there is no limitation here.

[0267] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0268] In the embodiments of the present application, the form of the network device is not limited. The device used to implement the function of the network device can be a network device; it can also be a device that can support the network device to implement the function, such as a chip system. The device can be installed in the network device or used in conjunction with the network device.

[0269] In this communication system, two PTRS ports correspond to two MCSs, such as the first MCS and the second MCS. The first time domain density corresponding to the first PTRS port can be determined according to the first MCS and / or the second MCS indicated by the network device, and the time domain density corresponding to the second PTRS port can also be determined according to the first MCS and / or the second MCS indicated by the network device. In this way, the terminal device can determine the first time domain density corresponding to the first PTRS port and the second time domain density corresponding to the second PTRS port, so that the terminal device can subsequently send the first PTRS on the first PTRS port and send the second PTRS on the second PTRS port, thereby improving the reliability and efficiency of communication.

[0270] It can be understood that FIG9 is a simplified schematic diagram for ease of understanding, and the communication system may also include other network devices and / or other terminal devices, which are not shown in FIG9 .

[0271] For ease of understanding, the communication method provided by the embodiment of the present application will be specifically described below in conjunction with Figures 10 to 13. The embodiment of the present application is applicable to a scenario where a single terminal supports more than 4 and / or more than 4 layers of transmission. The communication method provided by the embodiment of the present application is specifically described below using this scenario.

[0272] For example, Figure 10 is a flow chart of a communication method provided in an embodiment of the present application. This method can be applied to the communication between the terminal device and the network device in the above communication system.

[0273] Specifically, as shown in FIG10 , the process of the communication method is as follows:

[0274] S1001: A network device sends first indication information, and a terminal device receives the first indication information.

[0275] Among them, the first indication information can be DCI signaling, and the DCI signaling can include transport block indication information, PUSCH precoding and precoding information and number of layers information, SRS resource indicator information, antenna port (antenna port(s), DMRS port or port combination) indication information and PTRS-DMRS association (PTRS-DMRS association), etc.

[0276] The transport block indication information may include two codeword information, namely, first codeword information and second codeword information. The first codeword information may include a first MCS, a new data indicator (NDI), and a redundancy version (RV) indication. The second codeword information may include a second MCS, an NDI, and an RV indication.

[0277] The values ​​of the first MCS and the second MCS can be determined according to any one of the following tables 29-31 without limitation.

[0278] Table 29

[0279] Table 30

[0280] Table 31

[0281] The parameters in Tables 29 to 31 above include: MCS index (MCS index, I MCS ), modulation order (Qm), target code rate and spectral efficiency. MCS They correspond to a set of Qm, target bit rate and spectrum efficiency respectively.

[0282] The first MCS is denoted as I MCS1 , the second MCS is recorded as I MCS2 , the network device can indicate I through DCI signaling MCS1 and I MCS2 For example, the network device may indicate I MCS1 is 10, and I MCS2 is 25.

[0283] It should be noted that the MCS indexes shown in Tables 29 to 31 above correspond to the respective I MCS The included modulation order, target code rate, and spectrum efficiency are only examples. The embodiments of the present application do not specifically limit the correspondence between the MCS index and the MCS. For example, the values ​​of the MCS index from top to bottom in Tables 29-31 may also be decreasing, that is, the MCS index corresponding to the MCS in the first row is 31, the MCS index corresponding to the MCS in the second row is 30, and so on. The MCS index corresponding to the MCS in the last row is 0. The embodiments of the present application do not limit this.

[0284] It can be understood that according to the introduction of the above technical terms, the reason why the first indication information indicates the first MCS and the second MCS may be: the two PTRS ports correspond to one CW respectively. For example, as shown in Figure 8, PTRS port 0 corresponds to CW0, and PTRS port 1 corresponds to CW1. At this time, the network device needs to indicate the MCS corresponding to the two CWs, such as the first MCS and the second MCS, through the first indication information. It should be noted that the first MCS and the second MCS can be carried in the same first indication information, or can be carried in different first indication information respectively, without limitation. For example, the network device can indicate the first MCS and the second MCS through a first indication information; for another example, the network device can indicate the first MCS through the first indication information #1, and indicate the second MCS through the first indication information #2.

[0285] NDI can be used to indicate whether the current schedule is a new transmission or a retransmission.

[0286] The RV indication can be used to indicate the starting position of each hybrid automatic repeat request (HARQ) subpacket in the buffer. PUSCH precoding can indicate TPMI for the precoding matrix. TPMI can be used to determine the PUSCH transmission mode. The PUSCH transmission mode may include a fully coherent transmission mode, a partially coherent transmission mode, a non-coherent transmission mode, a non-codebook transmission mode, etc. TPMI corresponds to a precoding matrix. The precoding matrix may include X uplink physical uplink shared channel PUSCH / sounding reference signal SRS ports, and Y data layers. Each data layer corresponds to a DMRS port. In an embodiment of the present application, X is greater than 4, and / or Y is greater than 4. The network device can send TPMI to the terminal device through DCI signaling. The terminal device can determine the precoding matrix based on TPMI. For example, the precoding matrix determined by the terminal device based on TPMI is shown in Figure 8, where PTRS port 0 corresponds to the first 4 rows of the precoding matrix, and PTRS port 1 corresponds to the last 4 rows of the precoding matrix.

[0287] The number of transmission layers can also be referred to as the number of uplink transmission streams, or the number of spatial layers. It can be understood that one DMRS port corresponds to one transmission stream number, or one column of the precoding matrix corresponds to one upper transmission layer. Therefore, the transmission layer number indication can represent the number of transmission layers corresponding to the terminal device, or the number of DMRS ports corresponding to the terminal device. It can be understood that in the embodiment of the present application, the number of transmission layers indicated by the transmission layer number information is greater than 4 and less than or equal to 8, that is, the number of uplink transmission streams of the terminal device can be 5, 6, 7 or 8, and the embodiment of the present application does not limit this. For ease of understanding, the embodiment of the present application is introduced with the uplink transmission stream number of 8, and will not be repeated later.

[0288] The SRS resource indication information is used to indicate PUSCH precoding and the number of transmission layers based on non-codebook transmission.

[0289] The following describes the specific steps for the terminal device to send PTRS.

[0290] Step a: The terminal device can determine the DMRS port associated with each PTRS port based on the DMRS port indication information and the PTRS-DMRS association relationship.

[0291] Among them, the DMRS port indication can refer to the above Table 7-Table 14, which will not be repeated here; the PTRS-DMRS association relationship can refer to the above Table 18 and Table 19.

[0292] It can be understood that Tables 22-25 and their corresponding PTRS-DMRS association determination processes can also be used in the embodiments of the present application to determine the DMRS port associated with the PTRS port, without limitation. The above antenna port combination indication is only a possible example. The antenna port combination can also have other combinations. Under each combination, the DMRS associated with the PTRS can be determined according to any of the above methods, without limitation. For example, for Type2 DMRS, if the DMRS port scheduled by DCI is {0, 1, 2, 3, 12, 13, 14, 15}, the candidate DMRS port associated with Type2 DMRS PTRS port 0 can be {0, 1, 2, 3}. At this time, if the DCI indication Value is 1, the DMRS port bound to PTRS port 0 can be the 4th among the candidate DMRS ports {0, 1, 2, 3}, that is, PTRS port 0 is bound to DMRS port 1. PTRS port 1 can determine the bound DMRS port through the default rule. For example, the default rule can be to select the DMRS port with the smallest DMRS port number among the DMRS ports that can be bound. That is, the DMRS port bound to PTRS port 1 can be the DMRS port with the smallest port number among the DMRS ports {12, 13, 14, 15}, that is, PTRS port 1 can be bound to DMRS port 12.

[0293] Step b: The terminal device may determine the PTRS time-frequency resources based on the DMRS port associated with each PTRS port, the PTRS time-frequency domain density, and the PTRS time-frequency resource mapping.

[0294] The time domain resource mapping of PTRS is similar to that of DMRS. The frequency domain resource mapping of PTRS can be determined based on the correspondence between the PTRS port and the DMRS port. For example, as shown in Table 17 above, assuming that the high-level parameter resourceElementoffset field is configured as 'offset01', the terminal device can determine that the frequency domain resource position corresponding to PTRS port 0 is subcarrier #6 based on the binding relationship between PTRS port 0 and DMRS port 3. Similarly, the terminal device can determine that the frequency domain resource position corresponding to PTRS port 1 is subcarrier #7 based on the binding relationship between PTRS port 1 and DMRS port 12.

[0295] It is understood that the above Table 17 is only a possible example and is not limited to the process corresponding to Table 17 described in the embodiment. The time domain position l corresponding to the PTRS can be described in accordance with the relevant description of steps 1 to 4 in the above technical term "2. PTRS", which will not be repeated here.

[0296] The PTRS time domain density can be determined based on the MCS of the current scheduling (such as the first MCS and the second MCS mentioned above). For detailed introduction, please refer to the relevant introduction in the following steps S1002 and S1003.

[0297] The PTRS frequency domain density can be determined based on the number of RBs scheduled at the time. The specific implementation process is similar to the judgment process shown in Table 4 above. You can refer to it for understanding and will not elaborate on it.

[0298] Step c: The terminal device determines the PTRS transmit power based on the TPMI, the number of transport layers, the number of PTRS ports, and the ptrs-Power field.

[0299] For PUSCH transmission with a maximum of 8 streams at 8T, the power coefficient of the PTRS port is determined according to Table 32, which is described in detail below.

[0300] Table 32

[0301] According to Table 32 above, for fully coherent transmission, the PTRS port power is the same as the criterion under 4T. For example, if the PUSCH transmission mode is fully coherent transmission, That is, the power coefficient of each PTRS port is only related to the total number of uplink transmission layers.

[0302] For partially coherent transmission, if the value of ptrs-Power can be 00, the power coefficient of each PTRS port can be P1=min{10log(L x )+10log(Q p ),10log(L)} or, P2=10log(L x )+10log(Q p )=10*log10(L x *Q p ); where L x is the number of PUSCH layers coherently transmitted by the PUSCH transmission layer associated with PTRS port x, Q p The number of PTRS ports. This application does not limit the use of P1 or P2 to calculate the power coefficient for the terminal device. If the value of ptrs-Power can be 01, That is, the power coefficient of each PTRS port is only related to the total number of uplink transmission layers.

[0303] For incoherent transmission and non-codebook based transmission, if the value of ptrs-Power can be 00, P = 10log 10 (Q p), that is, the power coefficient of each PTRS port is only related to the number of PTRS ports; if the value of ptrs-Power can be 01, That is, the power coefficient of each PTRS port is only related to the total number of uplink transmission layers.

[0304] The terminal device can determine the power coefficient of each PTRS port according to Table 32 above Afterwards, the terminal device can and The relationship between each PTRS port is determined by PT-RS .

[0305] It can be understood that the embodiments of the present application do not limit the order in which the terminal device determines the PTRS time-frequency resources and PTRS transmission power.

[0306] Step d: The terminal device can send PTRS according to the PTRS time-frequency resources and power coefficient and the predefined PTRS signal generation formula.

[0307] The terminal can be based on The corresponding PTRS is sent on each PTRS port.

[0308] The specific implementation process of this step can refer to the relevant introduction in the following steps S1002 and S1003, which will not be repeated here.

[0309] It can be understood that the naming of the above-mentioned first indication information is only an example, and the first indication information can also be called indication information #1, indication information #a, etc., without limitation.

[0310] S1002: The terminal device sends a first PTRS through a first PTRS port.

[0311] Among them, the first PTRS is the PTRS sent by the terminal device using the first PTRS port, the time domain density corresponding to the first PTRS is the first time domain density, and the first time domain density is associated with the first MCS and / or the second MCS.

[0312] The first time domain density can be used to represent the density of the first PTRS in the time domain, that is, the OFDM symbol interval where the first PTRS appears in a time slot. The first time domain density is recorded as L PT-RS 1. It can be understood that the greater the first time domain density, the fewer OFDM symbols the first PTRS occupies in a time slot; and the smaller the first time domain density, the more OFDM symbols the first PTRS occupies in a time slot. The OFDM symbols in the time slot may be OFDM symbols included in the PUSCH.

[0313] It is understood that the terminal device does not need to distinguish between the first MCS and the second MCS and the correspondence between the two PTRS ports. The terminal device can directly determine the first time domain density based on the first MCS; alternatively, the terminal device can determine the first time domain density based on the second MCS; alternatively, the terminal device can determine the first time domain density based on the first MCS and the second MCS. The following three cases are used as examples for detailed description.

[0314] First, the network device sends the second indication information, and the terminal device receives the second indication information.

[0315] The second indication information may be high-layer signaling, which may include PTRS time domain density information. The PTRS time domain density information may be used to divide different MCS threshold intervals, and the MCS threshold intervals are used to determine the first time domain density and the second time domain density. The PTRS time domain density information may include at least one of the following: a first MCS threshold value, a second MCS threshold value, or a third MCS threshold value.

[0316] The first MCS threshold value may be ptrs-MCS1 in Table 15 above, the second MCS threshold value may be ptrs-MCS2 in Table 15 above, and the third MCS threshold value may be ptrs-MCS3 in Table 15 above.

[0317] It can be understood that the naming of the above-mentioned second indication information is only an example, and the second indication information can also be called indication information #2, indication information #b, etc., without limitation.

[0318] Case 1: The terminal device can determine the first time domain density based on the first MCS and multiple MCS threshold values.

[0319] That is, the first time domain density may be associated with the first MCS and multiple MCS threshold values.

[0320] The first time domain density, associated with the first MCS and multiple MCS threshold values, may satisfy any of the following:

[0321] If the first MCS is less than the first MCS threshold value, the first PTRS does not exist.

[0322] If the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the first time domain density is the first value.

[0323] If the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the first time domain density is the second value.

[0324] If the first MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the first time domain density is the third value.

[0325] The non-existence of the first PTRS may also be replaced by the non-existence of the first PTRS port, that is, the terminal device does not use the first PTRS port to send the first PTRS, without limitation.

[0326] The fourth MCS threshold value may be a preset value or a default value, and the fourth MCS threshold value may be ptrs-MCS4 in Table 15. The value of ptrs-MCS4 may be determined by the MCS index in Tables 28-30. In Tables 28 and 30, the value of ptrs-MCS4 may be 29. In Table 29, the value of ptrs-MCS4 may be 28, without limitation.

[0327] According to ptrs-MCS1, ptrs-MCS2, ptrs-MCS3, ptrs-MCS4 and Table 15 above, the first value can be equal to 4, the second value can be equal to 2, and the third value can be equal to 2. It can be understood that the first value, the second value, and the third value can also be any other possible values ​​without limitation.

[0328] That is, if I MCS1 Less than ptrs-MCS1, the first PTRS does not exist; if I MCS1 Greater than or equal to ptrs-MCS1 and less than ptrs-MCS2, then L PT-RS 1 is equal to 4; if I MCS1 Greater than or equal to ptrs-MCS2 and less than ptrs-MCS3, then L PT-RS 1 is equal to 2; if I MCS1 Greater than or equal to ptrs-MCS3 and less than ptrs-MCS4, then L PT-RS 1 equals 1.

[0329] Case 2: The terminal device can directly determine the first time domain density based on the second MCS and multiple MCS threshold values.

[0330] That is, the first time domain density may be associated with the second MCS and multiple MCS threshold values.

[0331] The first time domain density, associated with the second MCS and multiple MCS threshold values, may satisfy any of the following:

[0332] If the second MCS is less than the first MCS threshold value, the first PTRS does not exist.

[0333] If the second MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the first time domain density is the first value.

[0334] If the second MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the first time domain density is the second value.

[0335] If the second MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the first time domain density is the third value.

[0336] That is, if I MCS2 Less than ptrs-MCS1, the first PTRS does not exist; if I MCS2 Greater than or equal to ptrs-MCS1 and less than ptrs-MCS2, then L PT-RS 1 is equal to 4; if I MCS2 Greater than or equal to ptrs-MCS2 and less than ptrs-MCS3, then L PT-RS 1 is equal to 2; if I MCS2 Greater than or equal to ptrs-MCS3 and less than ptrs-MCS4, then L PT-RS 1 equals 1.

[0337] Case 3: The terminal device can determine the first time domain density based on the first MCS, the second MCS and multiple MCS threshold values.

[0338] In other words, the first time domain density can be associated with the fourth value and multiple MCS threshold values.

[0339] The fourth value may be associated with the first MCS and the second MCS. The fourth value may be at least one of the following: Mean (first MCS, second MCS); ;or,

[0340] That is, if the average value of the first MCS and the second MCS is an integer, the fourth value may be Mean(first MCS, second MCS).

[0341] If the average of the first MCS and the second MCS is a non-integer, the fourth value can be or No restrictions.

[0342] For example, if I MCS1 Equal to 20, I MCS2 =10, then the fourth value = Mean(20, 10) = 15. MCS1 Equal to 15, I MCS2 is equal to 16, then or,

[0343] The first time domain density, associated with the fourth value and multiple MCS threshold values, may satisfy any of the following conditions:

[0344] If the fourth value is less than the first MCS threshold value, the first PTRS does not exist.

[0345] If the fourth value is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the first time domain density is the first value.

[0346] If the fourth value is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the first time domain density is the second value.

[0347] If the fourth value is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the first time domain density is the third value.

[0348] The fourth value is recorded as I MCS3 , at this time, if I MCS3 Less than ptrs-MCS1, the first PTRS does not exist; if I MCS3 Greater than or equal to ptrs-MCS1 and less than ptrs-MCS2, then L PT-RS 1 is equal to 4; if I MCS3 Greater than or equal to ptrs-MCS2 and less than ptrs-MCS3, then L PT-RS 1 is equal to 2; if I MCS3 Greater than or equal to ptrs-MCS3 and less than ptrs-MCS4, then L PT-RS 1 equals 1.

[0349] The terminal device can determine the L PT-RS 1. Send a first PTRS through a first PTRS port. S1003. The terminal device sends a second PTRS through a second PTRS port.

[0350] Among them, the second PTRS is the PTRS sent by the terminal device using the first PTRS port, the time domain density corresponding to the second PTRS is the second time domain density, and the second time domain density is associated with the first MCS and / or the second MCS.

[0351] The second time domain density can be used to represent the density of the second PTRS in the time domain, that is, the OFDM symbol interval where the second PTRS appears in a time slot. The second time domain density is recorded as L PT-RS2. It can be understood that the greater the second time domain density, the fewer OFDM symbols the second PTRS occupies in a time slot; and the smaller the second time domain density, the more OFDM symbols the second PTRS occupies in a time slot.

[0352] Similar to step S1002 above, the terminal device does not need to distinguish between the first and second MCSs and their corresponding relationships with the two PTRS ports. The terminal device can directly determine the second time domain density based on the first MCS. Alternatively, the terminal device can determine the second time domain density based on the second MCS. Alternatively, the terminal device can determine the second time domain density based on the first and second MCSs. The following three cases are used as examples for detailed description.

[0353] Case 4: The terminal device can determine the second time domain density based on the first MCS and multiple MCS threshold values.

[0354] That is, the second time domain density may be associated with the first MCS and multiple MCS threshold values.

[0355] The second time domain density, associated with the first MCS and multiple MCS threshold values, may satisfy any of the following:

[0356] If the first MCS is less than the first MCS threshold value, the second PTRS does not exist.

[0357] If the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the second time domain density is the first value.

[0358] If the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the second time domain density is the second value.

[0359] If the first MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the second time domain density is the third value.

[0360] The non-existence of the second PTRS may also be replaced by the non-existence of the second PTRS port, that is, the terminal device does not use the second PTRS port to send the second PTRS.

[0361] That is, if I MCS1 Less than ptrs-MCS1, the second PTRS does not exist; if I MCS1 Greater than or equal to ptrs-MCS1 and less than ptrs-MCS2, then L PT-RS 2 is 4; if I MCS1 Greater than or equal to ptrs-MCS2 and less than ptrs-MCS3, then L PT-RS 2 is 2; if IMCS1 Greater than or equal to ptrs-MCS3 and less than ptrs-MCS4, then L PT-RS 2 is 1.

[0362] Case 5: The terminal device can directly determine the second time domain density based on the second MCS and multiple MCS threshold values.

[0363] That is, the second time domain density may be associated with the second MCS and multiple MCS threshold values.

[0364] The second time domain density, associated with the second MCS and multiple MCS threshold values, may satisfy any of the following:

[0365] If the second MCS is less than the first MCS threshold value, the second PTRS does not exist.

[0366] If the second MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the second time domain density is the first value.

[0367] If the second MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the second time domain density is the second value.

[0368] If the second MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the second time domain density is the third value.

[0369] That is, if I MCS2 Less than ptrs-MCS1, the second PTRS does not exist; if I MCS1 Greater than or equal to ptrs-MCS1 and less than ptrs-MCS2, then L PT-RS 2 is equal to 4; if I MCS1 Greater than or equal to ptrs-MCS2 and less than ptrs-MCS3, then L PT-RS 2 is 2; if I MCS1 Greater than or equal to ptrs-MCS3 and less than ptrs-MCS4, then L PT-RS 2 equals 1.

[0370] Case 6: The terminal device can determine the second time domain density based on the first MCS, the second MCS and multiple MCS threshold values.

[0371] In other words, the second time domain density can be associated with the fourth value and multiple MCS threshold values.

[0372] The fourth value may be associated with the first MCS and the second MCS, and the fourth value may be at least one of the following: Mean (first MCS, second MCS); or,

[0373] That is, if the average value of the first MCS and the second MCS is an integer, the fourth value may be Mean(first MCS, second MCS).

[0374] If the average of the first MCS and the second MCS is a non-integer, the fourth value can be or No restrictions.

[0375] That is, if I MCS3 Less than ptrs-MCS1, the second PTRS does not exist; if I MCS3 Greater than or equal to ptrs-MCS1 and less than ptrs-MCS2, then L PT-RS 2 is equal to 4; if I MCS3 Greater than or equal to ptrs-MCS2 and less than ptrs-MCS3, then L PT-RS 2 is 2; if I MCS3 Greater than or equal to ptrs-MCS3 and less than ptrs-MCS4, then L PT-RS 2 equals 1.

[0376] In this way, the terminal device can determine the L PT-RS 2. Send the second PTRS on the second PTRS port.

[0377] It should be noted that the terminal device is using L PT-RS 1 When sending the first PTRS, it is necessary to determine the OFDM symbol occupied by the first PTRS in a time slot according to steps 1-4 in "2.PTRS" in the above technical terms. Similarly, when the terminal device uses L PT-RS When sending the second PTRS, the occupied OFDM symbols within the same time slot as the second PTRS need to be determined according to steps 1-4 in "2. PTRS" in the technical terminology above. The specific implementation process can be referred to the description in the technical terminology above and will not be repeated here. The occupied OFDM symbols within a time slot of the first PTRS and the occupied OFDM symbols within the same time slot of the second PTRS can be the OFDM symbols contained in the PUSCH.

[0378] In summary, if two PTRS ports correspond to two MCSs, for example, the first MCS and the second MCS, the first time-domain density corresponding to the first PTRS port can be determined according to the first MCS and / or the second MCS indicated by the network device, and the time-domain density corresponding to the second PTRS port can also be determined according to the first MCS and / or the second MCS indicated by the network device. In this way, the terminal device can determine the first time-domain density corresponding to the first PTRS port and the second time-domain density corresponding to the second PTRS port, so as to be used for the terminal device to subsequently send the first PTRS on the first PTRS port and send the second PTRS on the second PTRS port, thereby improving the reliability and efficiency of communication.

[0379] It can be understood that when the above first MCS is equal to the second MCS, the first time-domain density and the second time-domain density determined by the terminal device through any one of the above cases 1 - case 6 are equal. That is, within the same time slot, the OFDM symbols occupied by the first PTRS and the second PTRS are the same, or in other words, the OFDM symbols occupied by the first PTRS port and the second PTRS port are the same.

[0380] However, if the first MCS is not equal to the second MCS, the first MCS and the second MCS may fall into different threshold intervals in Table 15 above. The time-domain densities corresponding to the two PTRS ports are different, which may result in different power coefficients of some PTRS ports on different OFDM symbols, thereby causing the power coefficients of some of these PTRS ports to send PTRS on some OFDM symbols to exceed the maximum power coefficient supported by the OFDM.

[0381] For example, as shown in Figure 8, PTRS port 0 is bound to DMRS port 1, and PTRS port 1 is bound to DMRS port 12. At this time, assuming that the high-layer parameter resourceElementoffset field is configured as 'offset01', the terminal device can determine that the frequency-domain resource position corresponding to PTRS0 is subcarrier #6 according to the binding relationship between PTRS port 0 and DMRS port 1. Similarly, the terminal device can determine that the frequency-domain resource position corresponding to PTRS1 is subcarrier #7 according to the binding relationship between PTRS port 1 and DMRS port 12.

[0382] Let the MCS corresponding to CW0 be I MCS01 , and the MCS corresponding to CW1 be I MCS02 , if I MCS01 and I MCS02 fall into different intervals in Table 15 above, for example, ptrs - MCS2 ≤ I MCS01 < ptrs - MCS3, and ptrs - MCS3 ≤ I MCS02<ptrs-MCS4, the time-domain density L0 of PTRS0 is 2, and the time-domain density L1 of PTRS1 is 1.

[0383] The terminal device can send PTRS0 on PTRS port 0 according to the TPMI shown in Figure 8, the frequency-domain resource position corresponding to PTRS port 0, and L0, and send PTRS1 on PTRS port 1 according to the TPMI shown in Figure 8, the frequency-domain resource position corresponding to PTRS port 1, and L1. As shown in Figure 11, the vertical axis is the subcarrier index, and the horizontal axis is the OFDM symbol index. The time-frequency resources occupied by PTRS0 are: (symbol #3, subcarrier #6), (symbol #5, subcarrier #6), (symbol #7, subcarrier #6), (symbol #9, subcarrier #6). The time-frequency resources occupied by PTRS1 are: (symbol #3, subcarrier #7), (symbol #4, subcarrier #7), (symbol #5, subcarrier #7), (symbol #6, subcarrier #7), (symbol #7, subcarrier #7), (symbol #8, subcarrier #7), (symbol #9, subcarrier #7), and (symbol #10, subcarrier #7).

[0384] It can be understood that, as shown in Figure 11, the terminal device can send DMRS on symbol #2, and the blank positions on symbols # - #10 can be understood as sending PUSCH data.

[0385] According to the relevant introduction in the above technical terms, the PTRS port power coefficient depends on the number of subcarriers occupied by PTRS and data on each OFDM symbol. As shown in Figure 11, the number of subcarriers occupied by PTRS0 and PTRS1 on different OFDM symbols is different, and the different number of subcarriers may result in different power coefficients corresponding to the same PTRS port (such as PTRS1) on different symbols.

[0386] The power coefficients corresponding to PTRS port 0 and PTRS port 1 can be determined according to the above Table 32. For example, for symbol #3, PTRS0 and PTRS1 both occupy the time-frequency resources of symbol #3, that is, PTRS port 0 sends PTRS0 on symbol #3, and PTRS port 1 sends PTRS1 on symbol #3. At this time, the power coefficient corresponding to PTRS port 0 is 9dB, and the power coefficient corresponding to PTRS port 1 is 9dB; for symbol #4, PTRS0 occupies the time-frequency resources of symbol #4, and PTRS1 does not occupy the time-frequency resources of symbol #4, that is, PTRS0 does not exist, or in other words, PTRS port 0 does not If PTRS port 1 sends PTRS1 on symbol #4, the actual power coefficient of PTRS port 1 is 6dB. At this time, the maximum power coefficient that can be supported on symbol #4 is 6dB. If the terminal device sends PTRS1 on symbol #4 according to the 9dB defined in Table 8 above, the maximum power coefficient that can be supported on symbol #4 will be 6dB, which is inconsistent with the PTRS power coefficient of 9dB notified in Table 32. As a result, the power coefficient of PTRS port 1 sending PTRS1 on symbol #4 exceeds the maximum power coefficient that can be supported by symbol #4, resulting in power exceeding the limit, which leads to low communication reliability and communication efficiency.

[0387] That is, when the time domain densities corresponding to the two PTRS ports are different, the power coefficients of some PTRS ports on different OFDM symbols will be different, which will further cause the power coefficients of these PTRS ports sending PTRS on some OFDM symbols to exceed the maximum power coefficient that OFDM can support.

[0388] Therefore, the embodiment of the present application proposes the following solution to avoid the problem of power exceeding the limit when the time domain densities corresponding to the two PTRS ports are different. The following situation is used as an example to introduce the details.

[0389] Case a: the first MCS is greater than the second MCS; the first time domain density is associated with the first MCS and multiple MCS threshold values; the second time domain density is associated with the first MCS and multiple MCS threshold values.

[0390] In this case, the first time domain density and the second time domain density can both be determined by the larger first MCS of the two MCSs, that is, the above-mentioned case 1 and case 4. At this time, the value of the first time domain density and the value of the second time domain density are equal, then the power coefficients of the first PTRS port and the second PTRS port on the OFDM symbol are the same, thereby avoiding the problem of power exceeding the limit due to different power coefficients of some PTRS ports on different OFDM symbols.

[0391] For example, as shown in Figure 11, IMCS01 MCS02 At this time, the terminal can set I MCS02 The corresponding time domain density is used as the time domain density of PTRS0 and PTRS1, that is, the time domain density of PTRS0 and PTRS1 is L1. At this time, the time-frequency resources occupied by PTRS0 and PTRS1 can be as shown in Figure 12. The time-frequency resources occupied by PTRS0 can be: (symbol #3, subcarrier #6), (symbol #4, subcarrier #6), (symbol #5, subcarrier #6), (symbol #5, subcarrier #6), (symbol #7, subcarrier #6), (symbol #8, subcarrier #6), (symbol #9, subcarrier #6) and (symbol #10, subcarrier #6); the time-frequency resources occupied by PTRS1 can be: (symbol #3, subcarrier #7), (symbol #4, subcarrier #7), (symbol #5, subcarrier #7), (symbol #6, subcarrier #7), (symbol #7, subcarrier #7), (symbol #8, subcarrier #7), (symbol #9, subcarrier #7) and (symbol #10, subcarrier #7).

[0392] In this case, the power coefficients corresponding to PTRS port 0 and PTRS port 1 on symbol #3 to symbol #10 are both 9 dB.

[0393] Case b: the first MCS is greater than the second MCS; the first time domain density is associated with the fourth value and multiple MCS threshold values; the second time domain density is associated with the first MCS and multiple MCS threshold values.

[0394] In this case, the first time domain density and the second time domain density are both determined by the average value of the two MCSs or the rounded value of the average values, that is, the above-mentioned case 3 and case 6. At this time, the value of the first time domain density and the value of the second time domain density are equal, then the power coefficients of the first PTRS port and the second PTRS port on the OFDM symbol are the same, thereby avoiding the problem of power exceeding the limit due to different power coefficients of some PTRS ports on different OFDM symbols.

[0395] Case c: the first MCS is smaller than the second MCS; the first time domain density is associated with the first MCS and multiple MCS threshold values; the second time domain density is associated with the first MCS and multiple MCS threshold values.

[0396] ​In this case, the first time domain density and the second time domain density are both determined by the smaller first MCS of the two MCSs, that is, the above-mentioned case 1 and case 4. At this time, the value of the first time domain density and the value of the second time domain density are equal, then the power coefficients of the first PTRS port and the second PTRS port on the OFDM symbol are the same, thereby avoiding the problem of power exceeding the limit due to different power coefficients of some PTRS ports on different OFDM symbols.

[0397] For example, as shown in Figure 11, I MCS01 MCS02 At this time, the terminal can set I MCS01 The corresponding time domain density is used as the time domain density of PTRS0 and PTRS1, that is, the time domain resources of PTRS0 and PTRS1 are both L0. At this time, the time-frequency resources occupied by PTRS0 and PTRS1 can be shown in Figure 13. The time-frequency resources occupied by PTRS0 are: (symbol #3, subcarrier #6), (symbol #5, subcarrier #6), (symbol #7, subcarrier #6), (symbol #9, subcarrier #6). The time-frequency resources occupied by PTRS1 are: (symbol #3, subcarrier #7), (symbol #5, subcarrier #7), (symbol #7, subcarrier #7), and (symbol #9, subcarrier #7).

[0398] In this case, the power coefficients corresponding to PTRS port 0 and PTRS port 1 on symbol #3, symbol #5, symbol #7 and symbol #9 are both 9dB, and PTRS is not sent on symbol #4, symbol #6, symbol #8 and symbol #10.

[0399] Case d: The first MCS is smaller than the second MCS. The first time-domain density is associated with the fourth value and multiple MCS threshold values; the second time-domain density is associated with the first MCS and multiple MCS threshold values.

[0400] In this case, the first time domain density and the second time domain density are both determined by the average value of the two MCSs or the rounded value of the average values, that is, the above-mentioned case 3 and case 6. At this time, the value of the first time domain density and the value of the second time domain density are equal, then the power coefficients of the first PTRS port and the second PTRS port on the OFDM symbol are the same, thereby avoiding the problem of power exceeding the limit due to different power coefficients of some PTRS ports on different OFDM symbols.

[0401] ​It can be understood that in the above cases a - d, the terminal device uses the same MCS. For example, the first MCS, the second MCS, or the fourth value is used to determine the first time domain density and the second time domain density, so as to align the time domain resources occupied by the first PTRS port and the second PTRS port, thus avoiding the situation where the power exceeds the limit.

[0402] Case e: When the first MCS is not equal to the second MCS and they fall into different threshold value ranges as shown in Table 15. For example, the first MCS falls within the first threshold value range and the second MCS falls within the second threshold value range, then the first time domain density and the second time domain density can be determined by the time domain density corresponding to the first MCS threshold value range.

[0403] For example, as shown in Figure 8, ptrs - MCS2 ≤ I MCS01 <ptrs - MCS3, ptrs - MCS3 ≤ I MCS02 <ptrs - MCS4, at this time, the terminal device can be based on I MCS01 The threshold value range where it is located to determine the time domain density of PTRS0 and PTRS1. That is, the time domain resources of PTRS0 and PTRS1 are both L0. At this time, the time - frequency resources occupied by PTRS0 and PTRS1 can be as shown in Figure 13. In this case, the power coefficients corresponding to PTRS port 0 and PTRS port 1 on symbols #3, #5, #7, and #9 are all 9 dB, and no PTRS is sent on symbols #4, #6, #8, and #10. In this case, the power coefficients corresponding to PTRS port 0 and PTRS port 1 on symbols #3, #5, #7, and #9 are all 9 dB, and no PTRS is sent on symbols #4, #6, #8, and #10.

[0404] Case f: When the first MCS is not equal to the second MCS and they fall into different threshold value ranges as shown in Table 15. For example, the first MCS falls within the first threshold value range and the second MCS falls within the second threshold value range, then the first time domain density and the second time domain density can be determined by the time domain density corresponding to the second MCS threshold value range.

[0405] For example, as shown in Figure 8, ptrs - MCS2 ≤ I MCS01 <ptrs - MCS3, ptrs - MCS3 ≤ I MCS02 <ptrs - MCS4, at this time, the terminal device can be based on I MCS02The threshold value range is used to determine the time domain density of PTRS0 and PTRS1, that is, the time domain resources of PTRS0 and PTRS1 are both L1. At this time, the time-frequency resources occupied by PTRS0 and PTRS1 can be shown in Figure 12. In this case, the power coefficients corresponding to PTRS port 0 and PTRS port 1 on symbol #3-symbol #10 are both 9dB.

[0406] It can be understood that in the above situation ef, the terminal devices all use the same threshold value interval to determine the first time domain density and the second time domain density. The threshold value interval can be the threshold value interval where the first MCS is located, or the threshold value interval where the second MCS is located, so that the time domain resources occupied by the first PTRS port and the second PTRS port can be aligned to avoid the situation where the power exceeds the limit, thereby improving the reliability and efficiency of communication.

[0407] Case j: The fifth value is greater than the sixth value. The values ​​of the first time-domain density and the second time-domain density are both equal to the fifth value.

[0408] Among them, the first PTRS port corresponds to the first MCS, and the second PTRS port corresponds to the second MCS. For example, as shown in Figure 8, the MCS corresponding to CW0 is 1 MCS01 , the MCS corresponding to CW1 is I MCS02 , and CW0 corresponds to PTRS port 0, CW1 corresponds to PTRS port 1, so PTRS port 0 corresponds to I MCS01 , PTRS port 1 corresponds to I MCS02 .

[0409] The fifth value may be associated with the first MCS and multiple MCS threshold values. The fifth value, associated with the first MCS and multiple MCS threshold values, satisfies any of the following:

[0410] If the first MCS is less than the first MCS threshold value, the first PTRS does not exist.

[0411] If the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the fifth value is the first value.

[0412] If the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the fifth value is the second value.

[0413] If the first MCS is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, the fifth value is the third value.

[0414] That is, the fifth value is the time domain density value determined by the terminal device based on the threshold value interval where the first MCS is located.

[0415] The sixth value, associated with the second MCS and multiple MCS threshold values, can satisfy any of the following:

[0416] If the second MCS is less than the first MCS threshold value, the second PTRS does not exist.

[0417] If the second MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the sixth value is the first value.

[0418] If the second MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the fifth value is the second value.

[0419] If the second MCS is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, the sixth value is the third value.

[0420] That is, the fifth value is the time domain density value determined by the terminal device according to the threshold value interval where the second MCS is located.

[0421] If the fifth value is greater than the sixth value, the terminal device can use the larger of the fifth value and the sixth value as the values of the first time domain density and the second time domain density. For example, as shown in Figure 8, L1 = 1 < L0 = 2. At this time, the time domain resources of both PTRS0 and PTRS1 are L0. At this time, the time-frequency resources occupied by PTRS0 and PTRS1 can be as shown in Figure 13. In this case, the power coefficients corresponding to PTRS port 0 and PTRS port 1 on symbols #3, #5, #7, and #9 are all 9 dB, and no PTRS is transmitted on symbols #4, #6, #8, and #10.

[0422] Case h: The fifth value is greater than the sixth value. The values of the first time domain density and the second time domain density are equal to the seventh value; the seventh value is associated with the fifth value and the sixth value.

[0423] Among them, the seventh value can be at least one of the following: Mean(fifth value, sixth value); Or,

[0424] For example, if the fifth value is 4 and the sixth value is 2, then Or, There is no limit.

[0425] If the fifth value is greater than the sixth value, the terminal device may use the seventh value associated with the fifth value and the sixth value as the values of the first time-domain density and the second time-domain density. At this time, the values of the first time-domain density and the second time-domain density are equal, so the power coefficients of the first PTRS port and the second PTRS port on the OFDM symbol are the same, thus avoiding the problem that the power coefficients of some PTRS ports on different OFDM symbols are different, resulting in power exceeding the limit, thereby improving the reliability and efficiency of communication.

[0426] Case i: The fifth value is less than the sixth value. The values of the first time-domain density and the second time-domain density are both equal to the fifth value.

[0427] If the fifth value is less than the sixth value, the terminal device may use the smaller fifth value of the fifth value and the sixth value as the values of the first time-domain density and the second time-domain density. For example, in Figure 8, L1 = 1 < L0 = 2. At this time, the time-domain resources of PTRS0 and PTRS1 are both L1. At this time, the time-frequency resources occupied by PTRS0 and PTRS1 can be shown in Figure 12. In this case, the power coefficients corresponding to the symbol #3 - symbol #10 of the PTRS port 0 and the PTRS port 1 are both 9 dB.

[0428] Case g: The fifth value is less than the sixth value. The values of the first time-domain density and the second time-domain density are equal to the seventh value.

[0429] That is, when the fifth value is less than the sixth value, the terminal device may use the seventh value associated with the fifth value and the sixth value as the values of the first time-domain density and the second time-domain density. At this time, the values of the first time-domain density and the second time-domain density are equal, so the power coefficients of the first PTRS port and the second PTRS port on the OFDM symbol are the same, thus avoiding the problem that the power coefficients of some PTRS ports on different OFDM symbols are different, resulting in power exceeding the limit.

[0430] It can be understood that in the above cases j - g, the terminal device uses the same time-domain density value, such as the fifth value, the sixth value, or the seventh value, as the first time-domain density and the second time-domain density, so as to align the time-domain resources occupied by the first PTRS port and the second PTRS port, and avoid the situation that the power of the first PTRS port or the second PTRS port exceeds the limit on some OFDM symbols, thereby improving the reliability and efficiency of communication.

[0431] In one possible design, the first power coefficient is associated with at least one of the following: PUSCH precoding, transmission layer number information, PTRS power information, or a value of the first scheduled PTRS port number. The first power coefficient is a power coefficient corresponding to the first PTRS.

[0432] The second power coefficient is associated with at least one of the following: PUSCH precoding, transmission layer number information, PTRS power information, or a value of the second scheduled PTRS port number. The second power coefficient is a power coefficient corresponding to the second PTRS.

[0433] The first power coefficient may be a power coefficient corresponding to the first PTRS; the second power coefficient may be a power coefficient corresponding to the second PTRS. PUSCH precoding may be used to determine a PUSCH transmission mode, which may include a fully coherent transmission mode, a partially coherent transmission mode, a non-coherent transmission mode, a non-codebook transmission mode, and the like.

[0434] The transmission layer number information can be the uplink transmission layer number corresponding to the terminal device In the embodiments of this application, The value can range from 1 to 8.

[0435] The PTRS power information may be a ptrs-Power field, and the values ​​of ptrs-Power may be: 00, 01, 10, and 11. Different values ​​correspond to different power factor assumptions.

[0436] The number of first-scheduled PTRS ports and the number of second-scheduled PTRS ports = {1, 2} PTRS ports.

[0437] The terminal device can use Table 32 to determine the first power coefficient and the second power coefficient based on PUSCH precoding, transmission layer number information, PTRS power information, or PTRS port number.

[0438] In a possible design scheme, when the first time domain density is less than the second time domain density, the value of the first scheduling PTRS port number is 1, and the value of the second scheduling PTRS port number is 2.

[0439] It can be understood that, as shown in Figure 11, when a PTRS port with a small time domain density exceeds the power limit on some OFDM symbols, the terminal device uses the port number Qp=1 to calculate the first power coefficient, that is, the terminal device uses the minimum value of the power coefficients corresponding to multiple OFDM symbols occupied by the first PTRS port as the power coefficient of the first PTRS port, and uses this minimum value as the first power coefficient to send the first PTRS. For example, as shown in Figure 11, the terminal device can use the power coefficient corresponding to symbol #3 to send PTRS1, that is, the terminal device can use 6dB on symbol #3-symbol 10 to send PTRS1.

[0440] The power coefficient of the PTRS port with a large time domain density will not be affected. Therefore, the terminal device still uses the number of ports Qp=2 to calculate the second power coefficient.

[0441] It can be understood that the terminal device uses this minimum value as the first power coefficient at the expense of some performance of the first PTRS port. For example, the signal strength of the first PTRS will be attenuated, but it can avoid exceeding the power limit on some OFDM symbols, thereby improving communication reliability and efficiency.

[0442] In one possible design, the value of the first scheduled PTRS port number is associated with the number of PTRS ports that actually transmit PTRS signals on each OFDM symbol; the value of the second scheduled PTRS port number is associated with the number of PTRS ports that actually transmit PTRS signals on each OFDM symbol;

[0443] The PTRS signal may include a first PTRS and a second PTRS; the OFDM symbol may be an OFDM symbol included in the PUSCH.

[0444] The terminal device can calculate the first power coefficient and the second power coefficient with each OFDM symbol (per OFDM symbol) as the granularity. If the first time domain density is the same as the second time domain density, the value of the first scheduling PTRS port number and the value of the second scheduling PTRS port number are the same in each OFDM symbol.

[0445] If the first time domain density is different from the second time domain density, such as the first time domain density is smaller than the second time domain density, then the value of the first scheduled PTRS port number and the value of the second scheduled PTRS port number are different in each OFDM symbol. The terminal device calculates the corresponding power coefficient on each OFDM symbol based on the number of PTRS ports that actually send PTRS signals on each OFDM symbol, which enables the terminal device to use the actual power coefficient to send PTRS signals on each OFDM symbol, thereby avoiding the situation where the first PTRS port exceeds the power limit on some OFDM symbols, thereby improving communication reliability and communication efficiency.

[0446] For example, as shown in Figure 11, the number of PTRS ports that the terminal device actually sends PTRS signals on symbols #3, symbol #5, symbol #7 and symbol #9 is 2, and the number of PTRS ports that actually send PTRS signals on symbols #4, symbol #6, symbol #8 and symbol #10 is 1. At this time, the terminal device can use Qp=2 on symbol #3 to calculate the first power coefficient #1 and the second power coefficient #1; the terminal device can use Qp=1 on symbol #4 to calculate the first power coefficient #2; the terminal device can use Qp=2 on symbol #5 to calculate the first power coefficient #3 and the second power coefficient #2; the terminal device can use Qp=1 on symbol #6 to calculate the first power coefficient #4; the terminal device can use Qp=2 on symbol #7 to calculate the first power coefficient #5 and the second power coefficient #3; the terminal device can use Qp=1 on symbol #8 to calculate the first power coefficient #6; the terminal device can use Qp=2 on symbol #9 to calculate the first power coefficient #7 and the second power coefficient #4; the terminal device can use Qp=1 on symbol #10 to calculate the first power coefficient #8.

[0447] It can be understood that in the embodiment of the present application, the time-frequency resources occupied by the PTRS port and the time-frequency resources occupied by the PTRS can be replaced with each other without limitation.

[0448] To facilitate understanding of the plan, the following content is added:

[0449] The DMRS indication method in the technical terminology section can be reflected in the following two-level signaling indication. Corresponding to RRC signaling, the DMRS type and maximum length and other information are configured. The DCI signaling selects a port group from the antenna port indication table for PDSCH / PUSCH-associated DMRS transmission. The specific method can be as follows:

[0450] In the existing NR protocol, DMRS port indication is notified through the RRC+DCI two-level signaling indication method. The specific notification method is as follows.

[0451] According to the DMRS symbol and time-frequency resource mapping method corresponding to the DMRS port defined by the existing NR standard or R18 standard. During each data transmission process, the network device needs to notify the terminal device of the corresponding allocated DMRS port. Based on the allocated DMRS port, the terminal device receives the pilot signal and performs the corresponding channel estimation process at the corresponding resource location in accordance with the DMRS symbol generation method and time-frequency resource mapping rules defined in the protocol. The DMRS port notification method currently defined in the NR protocol adopts the method of semi-statically configuring the DMRS type by high-level signaling and dynamically notifying the allocated DMRS port index by DCI. The specific method is as follows:

[0452] 1) RRC signaling configures the DMRS type and number of occupied symbols.

[0453] The DMRS type used is configured through the high-level signaling DMRS-DownlinkConfig. The specific signaling content is as follows:

[0454] The dmrs-Type field indicates whether Type 1 or Type 2 DMRS is used. The maxLength field indicates whether single-symbol or dual-symbol DMRS is used. Specifically, if the maxLength field is set to len2, the DCI can further indicate whether single-symbol or dual-symbol DMRS is used. If the maxLength field is not set, single-symbol DMRS is used.

[0455] 2) DCI signaling notification

[0456] The DCI signaling contains the field Antenna port, which indicates the assigned DMRS port index. The NR protocol defines different DMRS port tables for different DMRS-Type and maxLength configuration values. The Antenna port field in the DCI signaling indicates the index value in the DMRS port table corresponding to the DMRS-Type and maxLength values ​​configured by higher-layer signaling. Each index value corresponds to one or more DMRS port indices.

[0457] The uplink DMRS port indication method tables of the existing NR protocol are shown in Tables 33 to 48 below.

[0458] Table 33

[0459] Table 34

[0460] Table 35

[0461] Table 36

[0462] Table 37

[0463] Table 38

[0464] Table 39

[0465] Table 40

[0466] Table 41

[0467] Table 42

[0468] Table 43

[0469] Table 44

[0470] Table 45

[0471] Table 46

[0472] Table 47

[0473] Table 48

[0474] It can be seen that the existing NR protocol supports PUSCH transmission of less than or equal to 4 streams, and the number of orthogonal DMRS ports it supports only includes the support capability for rank <= 4 combinations.

[0475] Considering the DMRS enhancements outlined in the NR Release 18 standard and the increasing demand for uplink streams in real-world industrial scenarios, the Release 18 standard further enhances support for uplink DMRS ports. For uplink PUSCH transmission, each DMRS configuration supports single-user transmission with up to eight streams. For PUSCH transmission with up to eight streams, a possible DMRS port indication table design defined in the Release 18 standard is shown in Tables 49-52 below.

[0476] Table 49

[0477] Table 50

[0478] Table 51

[0479] Table 52

[0480] The communication method provided in the embodiment of the present application is described in detail above in conjunction with Figures 10 to 13. The communication device for executing the communication method provided in the embodiment of the present application is described in detail below in conjunction with Figures 14 and 15.

[0481] For example, Figure 14 is a structural diagram of a communication device according to an embodiment of the present application. As shown in Figure 14, the communication device 1400 includes a transceiver module 1401 and a processing module 1402. For ease of illustration, Figure 14 only shows the main components of the communication device.

[0482] In some embodiments, the communication device 1400 may be applicable to the communication system shown in FIG. 9 to perform the functions of the aforementioned terminal device.

[0483] The transceiver module 1401 may be used to execute the function of the terminal device to send and receive messages, and the processing module 1402 may execute functions of the terminal device other than sending and receiving messages.

[0484] Optionally, the transceiver module 1401 may include a sending module and a receiving module, wherein the sending module is used to implement the sending function of the communication device 1400 , and the receiving module is used to implement the receiving function of the communication device 1400 .

[0485] Optionally, the communication device 1400 may further include a storage module, wherein the storage module stores a program or instruction. When the processing module 1402 executes the program or instruction, the communication device 1400 may perform the above-mentioned communication method.

[0486] It should be noted that the communication device 1400 can be a terminal device, a chip (system) or other parts or components that can be set in a terminal device, or a device that includes a terminal device, which is not limited in this application.

[0487] In addition, the technical effects of the communication device 1400 can refer to the technical effects of the above-mentioned communication method, and will not be repeated here.

[0488] In some other embodiments, the communication device 1400 may be applicable to the communication system shown in FIG. 9 to perform the functions of the aforementioned network device.

[0489] The transceiver module 1401 may be used to execute the function of the network device to send and receive messages, and the processing module 1402 may execute functions of the network device other than sending and receiving messages.

[0490] Optionally, the transceiver module 1401 may include a sending module and a receiving module, wherein the sending module is used to implement the sending function of the communication device 1400 , and the receiving module is used to implement the receiving function of the communication device 1400 .

[0491] Optionally, the communication device 1400 may further include a storage module, wherein the storage module stores a program or instruction. When the processing module 1402 executes the program or instruction, the communication device 1400 may perform the above-mentioned communication method.

[0492] It should be noted that the communication device 1400 can be a network device, a chip (system) or other parts or components that can be set in the network device, or a device that includes a network device. This application does not limit this.

[0493] In addition, the technical effects of the communication device 1400 can refer to the technical effects of the above-mentioned communication method, and will not be repeated here.

[0494] For example, FIG15 is a second structural diagram of a communication device provided in an embodiment of the present application. The communication device may be a terminal, or a chip (system) or other component or assembly that can be provided in a terminal. As shown in FIG15 , the communication device 1500 may include a processor 1501. Optionally, the communication device 1500 may further include a memory 1502 and / or a transceiver 1503. The processor 1501 is coupled to the memory 1502 and the transceiver 1503, such as by a communication bus.

[0495] The following is a detailed introduction to the various components of the communication device 1500 with reference to FIG15 :

[0496] The processor 1501 is the control center of the communication device 1500 and can be a single processor or a collective term for multiple processing elements. For example, the processor 1501 can be one or more central processing units (CPUs), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, such as one or more digital signal processors (DSPs) or one or more field programmable gate arrays (FPGAs).

[0497] Optionally, the processor 1501 can execute various functions of the communication device 1500 by running or executing software programs stored in the memory 1502 and calling data stored in the memory 1502, such as executing the communication method shown in Figures 5 to 7 above.

[0498] In a specific implementation, as an embodiment, the processor 1501 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG15 .

[0499] In a specific implementation, as an embodiment, the communication device 1500 may also include multiple processors, such as the processor 1501 and the processor 1504 shown in FIG15 . Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0500] The memory 1502 is used to store the software program for executing the solution of the present application, and the execution is controlled by the processor 1501. The specific implementation method can refer to the above method embodiment and will not be repeated here.

[0501] Alternatively, the memory 1502 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 1502 may be integrated with the processor 1501 or exist independently and be coupled to the processor 1501 via an interface circuit (not shown in FIG. 15 ) of the communication device 1500. This embodiment of the present application does not specifically limit this.

[0502] Transceiver 1503 is used for communication with other communication devices. For example, if communication device 1500 is a terminal, transceiver 1503 can be used to communicate with a network device or another terminal device. For another example, if communication device 1500 is a network device, transceiver 1503 can be used to communicate with a terminal or another network device.

[0503] Optionally, the transceiver 1503 may include a receiver and a transmitter (not shown separately in FIG15 ), wherein the receiver is used to implement a receiving function, and the transmitter is used to implement a sending function.

[0504] Optionally, the transceiver 1503 can be integrated with the processor 1501, or can exist independently and be coupled to the processor 1501 through the interface circuit of the communication device 1500 (not shown in Figure 15). This embodiment of the present application does not specifically limit this.

[0505] It should be noted that the structure of the communication device 1500 shown in FIG15 does not constitute a limitation on the communication device. An actual communication device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0506] In addition, the technical effects of the communication device 1500 can refer to the technical effects of the communication method described in the above method embodiment, and will not be repeated here.

[0507] An embodiment of the present application provides a communication system, which may include: a terminal device and a network device as shown in FIG4 .

[0508] It should be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0509] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0510] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (such as infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state drive.

[0511] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. A and B can be singular or plural. Furthermore, the character " / " as used herein generally indicates an "or" relationship between the associated objects, but it may also indicate an "and / or" relationship. For specific understanding, please refer to the context.

[0512] In this application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0513] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0514] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0515] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0516] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0517] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0518] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0519] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0520] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: Receive first indication information; wherein the first indication information indicates a first modulation and coding scheme MCS and a second MCS; Sending a first PTRS through a first phase tracking reference signal PTRS port; wherein the time domain density corresponding to the first PTRS is a first time domain density, and the first time domain density is associated with the first MCS and / or the second MCS; A second PTRS is sent through a second PTRS port; wherein the time domain density corresponding to the second PTRS is a second time domain density, and the second time domain density is associated with the first MCS and / or the second MCS.

2. The method according to claim 1, characterized in that: The method further comprises: Receive second indication information; wherein the second indication information includes PTRS time domain density information, and the PTRS time domain density information is used to indicate multiple MCS threshold values; The first time domain density is associated with at least one of the following: the first MCS and the multiple MCS threshold values; the second MCS and the multiple MCS threshold values; or the first MCS, the second MCS, and the multiple MCS threshold values; The second time domain density is associated with at least one of the following: the first MCS and the multiple MCS threshold values; the second MCS and the multiple MCS threshold values; or the first MCS, the second MCS, and the multiple MCS threshold values.

3. The method according to claim 2, characterized in that The multiple MCS threshold values ​​include at least one of the following: a first MCS threshold value, a second MCS threshold value, or a third MCS threshold value.

4. The method according to claim 3, characterized in that The first time domain density is associated with the first MCS and the multiple MCS threshold values; the second time domain density is associated with the first MCS and the multiple MCS threshold values; The first time domain density, associated with the first MCS and the multiple MCS threshold values, satisfies any of the following items: If the first MCS is less than the first MCS threshold value, the first PTRS does not exist; If the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the first time domain density is a first value; If the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the first time domain density is the second value; If the first MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the first time domain density is the third value; wherein the fourth MCS threshold value is a preset value; the second time domain density, associated with the first MCS and the multiple MCS threshold values, satisfies any of the following items: If the first MCS is less than the first MCS threshold value, the second PTRS does not exist; If the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the second time domain density is the first value; If the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the second time domain density is a second value; If the first MCS is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, the second time domain density is the third value.

5. The method according to claim 3, characterized in that: The first time domain density is associated with a fourth value and the multiple MCS threshold values; the second time domain density is associated with the fourth value and the multiple MCS threshold values; the fourth value is associated with the first MCS and the second MCS; The first time domain density, associated with the fourth value and the multiple MCS threshold values, satisfies any of the following items: If the fourth value is less than the first MCS threshold value, the first PTRS does not exist; If the fourth value is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the first time domain density is the first value; If the fourth value is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the first time domain density is the second value; If the fourth value is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the first time domain density is the third value; wherein the fourth MCS threshold value is a preset value; The second time domain density, in association with the fourth value and the multiple MCS threshold values, satisfies any of the following items: If the fourth value is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, then the The second time domain density is the first value; If the fourth value is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the second time domain density is the second value; If the fourth value is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the second time domain density is the third value.

6. The method according to claim 5, characterized in that The fourth value is at least one of the following: Mean (first MCS, second MCS); or, 7. The method according to any one of claims 4 to 6, characterized in that: The first MCS is greater than the second MCS.

8. The method according to any one of claims 4 to 6, characterized in that: The first MCS is smaller than the second MCS.

9. The method according to claim 3, characterized in that: The first PTRS port corresponds to a first MCS, and the second PTRS port corresponds to a second MCS; the fifth value is associated with the first MCS and the multiple MCS threshold values; the sixth value is associated with the second MCS and the multiple MCS threshold values; the first time domain density is associated with the fifth value and the sixth value; the second time domain density is associated with the fifth value and the sixth value; The fifth value, in association with the first MCS and the multiple MCS threshold values, satisfies any of the following items: If the first MCS is less than the first MCS threshold value, the first PTRS does not exist; If the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the fifth value is the first value; If the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the fifth value is the second value; If the first MCS is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, the fifth value is the third value; wherein the fourth MCS threshold value is a preset value; A sixth value, associated with the second MCS and the multiple MCS threshold values, satisfies any of the following items: If the second MCS is less than the first MCS threshold value, the second PTRS does not exist; If the second MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the sixth value is the first value; If the second MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the fifth value is the second value; If the second MCS is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, the sixth value is the third value.

10. The method according to claim 9, characterized in that When the fifth value is greater than the sixth value, the values ​​of the first time-domain density and the second time-domain density are both equal to the fifth value.

11. The method according to claim 9, characterized in that When the fifth value is less than the sixth value, the values ​​of the first time-domain density and the second time-domain density are both equal to the fifth value.

12. The method according to claim 9, characterized in that When the fifth value is greater than the sixth value, the value of the first time domain density and the value of the second time domain density are equal to the seventh value; the seventh value is associated with the fifth value and the sixth value.

13. The method according to claim 9, characterized in that When the fifth value is less than the sixth value, the value of the first time domain density and the value of the second time domain density are equal to the seventh value; the seventh value is associated with the fifth value and the sixth value.

14. The method according to claim 12 or 13, characterized in that The seventh value is at least one of the following: Mean (fifth value, sixth value); or, 15. The method according to claim 2, characterized in that The first indication information further indicates PUSCH precoding and transmission layer number information, and the second indication information further includes PTRS power information.

16. The method according to claim 15, characterized in that The first power coefficient is associated with at least one of the following: The value of the PUSCH precoding, the transmission layer number information, the PTRS power information, or the first scheduled PTRS port number; wherein the first power coefficient is the power coefficient corresponding to the first PTRS; The second power coefficient is associated with at least one of the following: the PUSCH precoding, the transmission layer number information, the PTRS power information, or the value of the second scheduled PTRS port number; wherein the second power coefficient is the power coefficient corresponding to the second PTRS.

17. The method according to claim 15, characterized in that When the first time domain density is less than the second time domain density, the value of the first scheduled PTRS port number is 1, and the value of the second scheduled PTRS port number is 2.

18. The method according to claim 15, characterized in that The value of the first scheduled PTRS port number is associated with the number of PTRS ports that actually send PTRS signals on each OFDM symbol; the value of the second scheduled PTRS port number is associated with the number of PTRS ports that actually send PTRS signals on each OFDM symbol; the PTRS signal includes the first PTRS and the second PTRS; the OFDM symbol is the OFDM symbol contained in the PUSCH.

19. A communication device, characterized in that: include: Transceiver module and processing module; wherein, The transceiver module is used to receive first indication information; wherein the first indication information indicates a first modulation and coding scheme MCS and a second MCS; The processing module is used to control the transceiver module to send a first PTRS through a first phase tracking reference signal PTRS port; wherein the time domain density corresponding to the first PTRS is a first time domain density, and the first time domain density is associated with the first MCS and / or the second MCS; The processing module is also used to control the transceiver module to send a second PTRS through a second PTRS port; wherein the time domain density corresponding to the second PTRS is a second time domain density, and the second time domain density is associated with the first MCS and / or the second MCS.

20. The device according to claim 19, characterized in that The transceiver module is further used to receive second indication information; wherein the second indication information includes PTRS time domain density information, and the PTRS time domain density information is used to indicate multiple MCS threshold values; The first time domain density is associated with at least one of the following: the first MCS and the multiple MCS threshold values; the second MCS and the multiple MCS threshold values; or the first MCS, the second MCS, and the multiple MCS threshold values; The second time domain density is associated with at least one of the following: the first MCS and the multiple MCS threshold values; the second MCS and the multiple MCS threshold values; or the first MCS, the second MCS, and the multiple MCS threshold values.

21. The device according to claim 20, characterized in that The multiple MCS threshold values ​​include at least one of the following: a first MCS threshold value, a second MCS threshold value, or a third MCS threshold value.

22. The device according to claim 21, characterized in that The first time domain density is associated with the first MCS and the multiple MCS threshold values; the second time domain density is associated with the first MCS and the multiple MCS threshold values; The first time domain density, associated with the first MCS and the multiple MCS threshold values, satisfies any of the following items: If the first MCS is less than the first MCS threshold value, the first PTRS does not exist; If the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the first time domain density is a first value; If the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the first time domain density is the second value; If the first MCS is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the first time domain density is the third value; wherein the fourth MCS threshold value is a preset value; the second time domain density, associated with the first MCS and the multiple MCS threshold values, satisfies any of the following items: If the first MCS is less than the first MCS threshold value, the second PTRS does not exist; If the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the second time domain density is the first value; If the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the second time domain density is a second value; If the first MCS is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, the second time domain density is the third value.

23. The device according to claim 21, characterized in that The first time domain density is associated with a fourth value and the multiple MCS threshold values; the second time domain density is associated with the fourth value and the multiple MCS threshold values; the fourth value is associated with the first MCS and the second MCS; The first time domain density, associated with the fourth value and the multiple MCS threshold values, satisfies any of the following items: If the fourth value is less than the first MCS threshold value, the first PTRS does not exist; If the fourth value is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the first time domain density is the first value; If the fourth value is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the first time domain density is the second value; If the fourth value is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the first time domain density is the third value; wherein the fourth MCS threshold value is a preset value; The second time domain density, in association with the fourth value and the multiple MCS threshold values, satisfies any of the following items: If the fourth value is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the second time domain density is the first value; If the fourth value is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the second time domain density is the second value; If the fourth value is greater than or equal to the third MCS threshold value and less than the fourth MCS threshold value, the second time domain density is the third value.

24. The device according to claim 23, characterized in that The fourth value is at least one of the following: Mean (first MCS, second MCS); or, 25. The device according to any one of claims 22 to 24, characterized in that The first MCS is greater than the second MCS.

26. The device according to any one of claims 22 to 24, characterized in that The first MCS is smaller than the second MCS.

27. The device according to claim 21, characterized in that The first PTRS port corresponds to a first MCS, and the second PTRS port corresponds to a second MCS; the fifth value is associated with the first MCS and the multiple MCS threshold values; the sixth value is associated with the second MCS and the multiple MCS threshold values; the first time domain density is associated with the fifth value and the sixth value; the second time domain density is associated with the fifth value and the sixth value; The fifth value, in association with the first MCS and the multiple MCS threshold values, satisfies any of the following items: If the first MCS is less than the first MCS threshold value, the first PTRS does not exist; If the first MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the fifth value is the first value; If the first MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the fifth value is the second value; If the first MCS is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, the fifth value is the third value; wherein the fourth MCS threshold value is a preset value; A sixth value, associated with the second MCS and the multiple MCS threshold values, satisfies any of the following items: If the second MCS is less than the first MCS threshold value, the second PTRS does not exist; If the second MCS is greater than or equal to the first MCS threshold value and less than the second MCS threshold value, the sixth value is the first value; If the second MCS is greater than or equal to the second MCS threshold value and less than the third MCS threshold value, the fifth value is the second value; If the second MCS is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, the sixth value is the third value.

28. The device according to claim 27, characterized in that When the fifth value is greater than the sixth value, the values ​​of the first time-domain density and the second time-domain density are both equal to the fifth value.

29. The device according to claim 27, characterized in that When the fifth value is less than the sixth value, the values ​​of the first time-domain density and the second time-domain density are both equal to the fifth value.

30. The device according to claim 27, characterized in that When the first time domain density value is greater than the second time domain density value, the first time domain density value and the second time domain density value are equal to the seventh value; the seventh value is associated with the fifth value and the sixth value.

31. The device according to claim 27, characterized in that When the first time domain density value is less than the second time domain density value, the first time domain density value and the second time domain density value are equal to the seventh value; the seventh value is associated with the fifth value and the sixth value.

32. The device according to claim 30 or 31, characterized in that The seventh value is at least one of the following: Mean (fifth value, sixth value); or, 33. The device according to claim 20, characterized in that The first indication information further indicates PUSCH precoding and transmission layer number information, and the second indication information further includes PTRS power information.

34. The device according to claim 33, characterized in that The first power coefficient is associated with at least one of the following: The value of the PUSCH precoding, the transmission layer number information, the PTRS power information, or the first scheduled PTRS port number; wherein the first power coefficient is the power coefficient corresponding to the first PTRS; The second power coefficient is associated with at least one of the following: the PUSCH precoding, the transmission layer number information, the PTRS power information, or the value of the second scheduled PTRS port number; wherein the second power coefficient is the power coefficient corresponding to the second PTRS.

35. The device according to claim 33, characterized in that When the first time domain density is less than the second time domain density, the value of the first scheduled PTRS port number is 1, and the value of the second scheduled PTRS port number is 2.

36. The device according to claim 33, characterized in that The value of the first scheduled PTRS port number is associated with the number of PTRS ports that actually send PTRS signals on each OFDM symbol; the value of the second scheduled PTRS port number is associated with the number of PTRS ports that actually send PTRS signals on each OFDM symbol; the PTRS signal includes the first PTRS and the second PTRS; the OFDM symbol is the OFDM symbol contained in the PUSCH.

37. A communication device, characterized in that: The communication device comprises: a processor coupled to a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device executes the method according to any one of claims 1 to 18.

38. A communication chip, characterized in that: Instructions are stored therein, and when the chip runs on a communication device, the method according to any one of claims 1 to 18 is implemented.

39. A computer-readable storage medium, characterized in that: The computer-readable storage medium comprises a computer program or instructions, and when the computer program or instructions are executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 18.

40. A computer program product, characterized in that The computer program product comprises a computer program or instructions, and when the computer program or instructions are executed by a communication device, the method according to any one of claims 1 to 18 is executed.

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