WO2019062386A1 - Power configuration method and device for reference signal - Google Patents

Abstract

Disclosed are a power configuration method and device for a reference signal. The method comprises: preconfiguring correspondences between Modulation and Coding Scheme (MCS) levels and reference signal power; obtaining a current MCS level; and determining transmit power of a reference signal according to the current MCS level and the correspondences between the MCS levels and the reference signal power. By determining transmit power of a reference signal according to preconfigured correspondences between MCS levels and reference signal power, the present invention can effectively adjust the reference signal during application to high order modulation schemes, thereby improving the precision of phase noise estimation for the reference signal.

Description

Power configuration method and device for reference signal Technical field

The present disclosure relates to the field of communications, and in particular, to a power configuration method and apparatus for a reference signal.

Background technique

The phase noise has a great influence on the communication system in the high frequency band. When the higher order modulation mode is adopted, the influence of the same phase noise cannot be ignored. When high-order modulation is applied, the data is more affected by phase noise, so more accurate phase noise estimation is needed.

The technique of power enhancement of the phase tracking reference signal can effectively improve the phase noise estimation accuracy of the phase tracking reference signal. Therefore, it is necessary to perform effective phase tracking reference signal enhancement when applying the high order modulation mode, but no application has yet been proposed. High-order modulation mode phase tracking reference signal power enhancement technical solution.

Summary of the invention

In order to solve the above technical problem, an embodiment of the present disclosure provides a power configuration method and apparatus for a reference signal.

In order to achieve the objectives of the present disclosure, the present disclosure provides the following technical solutions:

A power configuration method for a reference signal, comprising:

Pre-configuring the correspondence between the modulation coding mode level and the reference signal power;

Obtain the current modulation coding mode level;

The transmission power of the reference signal is determined according to the current modulation coding mode level and the correspondence between the modulation coding mode level and the reference signal power.

The corresponding relationship between the modulation coding mode level and the reference signal power includes: a preset modulation coding mode level interval, a power parameter of the reference signal, and a correspondence between the modulation coding mode level interval and the power parameter;

The power parameter of the reference signal includes at least one of the following parameters:

Predetermined power value;

Power offset

Power factor.

The determining the transmit power of the reference signal according to the current modulation coding mode level and the corresponding relationship between the modulation coding mode level and the reference signal power, including: determining a modulation coding mode level interval to which the current modulation coding mode level belongs, based on The modulation coding mode level interval determines a power parameter of the reference signal, and the transmission power of the reference signal is obtained based on the determined power parameter.

The correspondence between the modulation coding mode level and the reference signal power includes: preset M modulation coding mode level thresholds, power parameters of N reference signals, and modulation corresponding to the M modulation coding mode level thresholds. Corresponding relationship between the coding mode level interval and the power parameters of the N reference signals; wherein, M is not less than N, and M and N are positive integers, respectively.

The method further includes: determining an upper limit of a power of the reference signal according to an upper power limit of the uplink and a power allocated for data on the uplink;

Determining the power of the reference signal according to the current modulation coding mode level and the correspondence between the modulation coding mode level and the reference signal power, including: according to the current modulation coding mode level, the modulation coding mode level, and the reference signal power Corresponding relationship, and an upper power limit of the reference signal, determining a transmission power of the reference signal.

The method further includes: configuring a correspondence between a modulation coding mode level corresponding to different frequency domain segments and a reference signal power;

Determining the reference signal power according to the current modulation coding mode level and the corresponding relationship between the modulation coding mode level and the reference signal power, including: according to the correspondence between the modulation coding mode level and the reference signal power corresponding to the current frequency domain segment, And the current modulation coding mode level, and determining the transmission power of the reference signal.

The correspondence between the modulation coding mode level corresponding to different frequency domain segments and the reference signal power includes one of the following:

a modulation coding mode level interval of the first frequency domain segment, a correspondence relationship between the modulation coding mode level interval and the reference signal power parameter, and a modulation coding mode level interval of the second frequency domain segment and the modulation coding mode level interval and the Corresponding relationship of reference signal power parameters;

a reference signal power parameter of the first frequency domain segment and a correspondence between the reference signal power parameter and a modulation coding mode level interval, and a reference signal power parameter of the second frequency domain segment and the reference signal power parameter and the modulation code The correspondence between the mode level intervals.

The correspondence between the modulation coding mode level and the reference signal power is related to the waveform.

A power configuration device for a reference signal, comprising:

The configuration module is configured to pre-configure a correspondence between a modulation coding mode level and a reference signal power;

Obtaining a module, configured to obtain a current modulation coding mode level;

The determining module is configured to determine a transmit power of the reference signal according to a current modulation coding mode level and a correspondence between the modulation coding mode level and a reference signal power.

A power configuration device for a reference signal, comprising:

a memory of a power configuration program storing a reference signal;

A processor configured to read a power configuration program of the reference signal to perform the operations of the above method.

A computer readable storage medium storing a power configuration program of a reference signal on a computer readable storage medium, the power configuration method of the reference signal being executed by a processor to implement the power configuration method of the reference signal.

The embodiment of the present disclosure determines the transmission power of the reference signal by pre-configuring the correspondence between the MCS level and the reference signal power, and can effectively adjust the reference signal when the high-order modulation mode is applied, thereby improving the phase noise estimation accuracy of the reference signal.

Other features and advantages of the present disclosure will be set forth in the description which follows. The objectives and other advantages of the present disclosure can be realized and obtained by the structure particularly pointed out in the appended claims.

DRAWINGS

The drawings are used to provide a further understanding of the technical solutions of the present disclosure, and constitute a part of the specification, and the embodiments of the present application are used to explain the technical solutions of the present disclosure, and do not constitute a limitation of the technical solutions of the present disclosure.

1 is a schematic diagram of PTRS power configuration when ZP-PTRS exists in the related art;

2 is a schematic diagram of PTRS power configuration when the power of the PTRS and the DMRS are the same in the related art;

3 is a schematic diagram of PTRS power configuration when a multiplex mode of a PTRS and a DMRS port is related in the related art;

4 is a schematic flowchart of a PTRS power configuration method in Embodiment 1;

5 is a schematic structural diagram of a PTRS power configuration apparatus in Embodiment 2;

6 is a schematic diagram of signal power comparison after inserting PTRS in Example 3;

7 is a schematic diagram of comparison of PTRS power in Example 3;

8 is a schematic diagram of comparison of PTRS power in Example 3;

9 is a schematic diagram of PTRS power comparison in Example 5.

Detailed ways

The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

In the current method of power configuration of the phase tracking reference signal (PTRS, Phase Tracking Reference Signal), the main methods are:

1) As shown in Figure 1, if there is a zero-power phase noise reference signal (ZP-PTRS, Zero Power PTRS), power boosting is performed on the PTRS at this time, that is, if two orthogonal PTRS ports are allocated, port 1 is ZP. -PTRS, port 2 can perform Power boosting, and the power is increased by 3dB;

2) As shown in FIG. 2, when the power of the PTRS and the demodulation reference signal (DMRS) are the same, if the DMRS port corresponding to the PTRS performs power boosting, the PTRS and the corresponding DMRS port use the same power. , then PTRS also performs power boosting;

3) As shown in FIG. 3, the PTRS is associated with the multiplexing mode of the corresponding DMRS port. For example, if the DMRS is in the FD-OCC mode, and the DMRS port 1 and the DMRS port 2 are in the frequency division multiplexing manner, the same PTRS can be performed. Power boosting.

It can be seen from the above that the phase tracking reference signal enhancement technical scheme that applies the high-order modulation mode and considers that the uplink may have different waveforms and power control factors has not been proposed in the related art.

For the above technical problems of the related art, the present application proposes the following technical solutions. The implementation manner of the technical solution of the present application will be described in detail below. It should be noted that the following technical solutions of the present application can be applied to the uplink and the downlink. The technical solution of the present application can be implemented by the terminal when applied to the uplink, and can be implemented by the base station when the downlink is applicable.

Embodiment 1

A power configuration method of a reference signal, as shown in FIG. 4, may include:

Step 401: Pre-configure a correspondence between a modulation and coding scheme (MCS) level and a reference signal power;

Step 402: Acquire a current MCS level.

Step 403: Determine a transmit power of the reference signal according to a current MCS level and a correspondence between the MCS level and a reference signal power.

In this embodiment, the transmission power of the reference signal is determined by pre-configuring the correspondence between the MCS level and the reference signal power, and the effective phase tracking reference signal enhancement can be performed when the high-order modulation mode is applied, thereby improving the phase of the phase tracking reference signal. Noise estimation accuracy.

In an implementation manner, the correspondence between the modulation coding mode level and the reference signal power may include: a preset modulation coding mode level interval, a power parameter of the reference signal, and the modulation coding mode level interval and the power parameter. Correspondence. The power parameter of the reference signal may include at least one of the following parameters: a predetermined power value, a power offset, and a power coefficient.

In this embodiment, the correspondence between the pre-configured MCS level and the reference signal power may be standard default or configured, and the configured signaling may be physical layer signaling or higher layer signaling (MAC CE or RRC signaling). .

In this embodiment, the method for obtaining the current MCS level may be: the base station selects one MCS level from the MCS list (including all MCS level information) as the current MCS level, and the terminal sends the MCS level to the terminal. The information is transmitted and the channel quality indicator (CQI) is fed back according to the current channel condition, and the base station performs MCS adjustment according to the information fed back by the terminal. In this way, the base station and the terminal determine the current MCS level through negotiation. In an implementation manner, in the uplink, the base station may select an MCS level as the current MCS level according to the measured uplink channel condition, and notify the terminal of the MCS level.

In this embodiment, determining the transmit power of the reference signal according to the current MCS level and the corresponding relationship between the MCS level and the reference signal power may include: determining a modulation coding mode level interval to which the current modulation and coding mode level belongs, The modulation coding mode level interval determines a power parameter of the reference signal, and the transmission power of the reference signal is obtained based on the determined power parameter.

Here, if the power parameter is a predetermined power value, the predetermined power value may be directly used as the transmission power of the reference signal; if the power parameter is a power offset, the power offset and the preset base power value may be used. The sum is the transmission power of the reference signal; if the power parameter is a power coefficient, the sum of the product of the power coefficient and the base power value and the base power value may be used as the transmission power of the reference signal. Of course, there may be other ways, for example, the product of the power coefficient and the base power value may be used as the transmission power of the reference signal, or the weight value may be added in the above "and", or the weight value or the like may be added to the above product. For specific methods, it can be set according to the needs of the actual application environment.

In an implementation manner, the correspondence between the modulation coding mode level and the reference signal power includes: preset M modulation coding mode level thresholds, N reference signal power parameters, and the M modulation coding mode levels. Corresponding relationship between the modulation coding mode level interval corresponding to the threshold and the power parameters of the N reference signals; wherein M is not less than N, and M and N are positive integers, respectively.

For an uplink with power control, the method may further include determining an upper power limit of the reference signal according to a power upper limit of the uplink and a power allocated for data on the uplink; the level according to a current modulation coding mode And determining a power of the reference signal according to a correspondence between the modulation coding mode level and the reference signal power, and the method may include: according to a current modulation coding mode level, a correspondence between the modulation coding mode level and a reference signal power, and the reference The upper power limit of the signal determines the transmit power of the reference signal. In an implementation manner, the power upper limit of the reference signal may be used as the maximum value of the reference signal transmission power, and the power parameter of the corresponding uplink is preset according to the maximum value. In this way, it is convenient to control the transmission power of the reference signal within the power control range of the uplink.

In an implementation manner, the corresponding relationship between the modulation coding mode level and the reference signal power of the different frequency domain segments may include one of the following: 1) a modulation coding mode level interval of the first frequency domain segment and the modulation coding Corresponding relationship between the mode level interval and the reference signal power parameter, and the modulation coding mode level interval of the second frequency domain segment and the corresponding relationship between the modulation coding mode level interval and the reference signal power parameter; 2) the first frequency domain segment Corresponding relationship between the reference signal power parameter and the reference signal power parameter and the modulation coding mode level interval, and the reference signal power parameter of the second frequency domain segment and the reference signal power parameter and the modulation coding mode level interval relationship. In this way, different correspondences are configured corresponding to different frequency domain segments, so that different reference signal powers are used in different frequency domain segments to meet the requirements of practical applications.

In an implementation manner, a correspondence between the modulation coding mode level and a reference signal power is related to a waveform. In this way, different reference signal transmission powers can be configured for different waveforms to meet the needs of practical applications.

In this embodiment, the reference signal may be a PTRS. In addition, it can be other types of reference signals, and this is not limited in this regard.

Embodiment 2

A power configuration device for a reference signal, as shown in FIG. 5, may include:

The configuration module 51 is configured to pre-configure a correspondence between the MCS level and the reference signal power;

The obtaining module 52 is configured to obtain a current MCS level;

The determining module 53 is configured to determine the transmit power of the reference signal according to the current MCS level and the correspondence between the MCS level and the reference signal power.

In this embodiment, the correspondence between the modulation coding mode level and the reference signal power may include: a preset modulation coding mode level interval, a power parameter of the reference signal, and the modulation coding mode level interval and the power parameter. Corresponding relationship; wherein the power parameter of the reference signal includes at least one of the following parameters: a predetermined power value; a power offset; a power coefficient.

In this embodiment, the determining module 53 is configured to determine the transmit power of the reference signal according to the current modulation and coding mode level and the corresponding relationship between the modulation and coding mode level and the reference signal power, and may include: determining a current modulation and coding mode. a modulation coding mode level interval to which the level belongs, determining a power parameter of the reference signal based on the modulation coding mode level interval, and obtaining a transmission power of the reference signal based on the determined power parameter.

In an implementation manner, the correspondence between the modulation coding mode level and the reference signal power may include: preset M modulation coding mode level thresholds, power parameters of N reference signals, and the M modulation and coding modes. Corresponding relationship between the modulation coding mode level interval corresponding to the level threshold and the power parameters of the N reference signals; wherein M is not less than N, and M and N are positive integers, respectively.

In this embodiment, the determining module 53 may be further configured to determine a power upper limit of the reference signal according to the power upper limit of the uplink and the power allocated for the data in the uplink; the determining module 53 is configured to The current modulation coding mode level, and the corresponding relationship between the modulation coding mode level and the reference signal power, determining the power of the reference signal may include: according to the current modulation coding mode level, the correspondence between the modulation coding mode level and the reference signal power And an upper power limit of the reference signal to determine a transmit power of the reference signal.

In this embodiment, the configuration module 51 may be configured to configure a correspondence between a modulation coding mode level and a reference signal power corresponding to different frequency domain segments; the determining module 53 is further configured to: according to a current modulation coding mode level, and Determining a reference signal power according to a correspondence between a modulation coding mode level and a reference signal power, including: determining a reference signal according to a correspondence between a modulation coding mode level corresponding to a current frequency domain segment and a reference signal power, and a current modulation coding mode level Transmit power.

In an implementation manner, the correspondence between the modulation coding mode level corresponding to different frequency domain segments and the reference signal power may include one of the following:

a modulation coding mode level interval of the first frequency domain segment, a correspondence relationship between the modulation coding mode level interval and the reference signal power parameter, and a modulation coding mode level interval of the second frequency domain segment and the modulation coding mode level interval and the Corresponding relationship of reference signal power parameters;

a reference signal power parameter of the first frequency domain segment and a corresponding relationship between the reference signal power parameter and a modulation coding mode level interval, and a reference signal power parameter of the second frequency domain segment and the reference signal power parameter and the modulation code The correspondence between the mode level intervals.

In this embodiment, the configuration module 51 is further configured to correlate the correspondence between the modulation and coding mode level and the reference signal power and the waveform.

In this embodiment, the power configuration device of the reference signal may be deployed in the terminal and/or the base station. In an actual application, the configuration module 51, the obtaining module 52, and the determining module 53 may be software, hardware, or a combination of the two.

Other technical details of this embodiment refer to Embodiment 1.

Embodiment 3

A power configuration device for a reference signal, which may include:

a memory of a power configuration program storing a reference signal;

A processor configured to read a power configuration program of the reference signal to perform the operations of the method as described in the first embodiment.

In this embodiment, the power configuration device of the reference signal may be deployed in the terminal and/or the base station.

Other technical details of this embodiment refer to Embodiment 1.

Embodiment 4

In addition, the embodiment of the present application further provides a computer readable storage medium, where the power configuration program of the reference signal is stored, and the power configuration program of the reference signal is executed by the processor to implement the first embodiment. The steps of the power configuration method of the reference signal.

In this embodiment, the computer readable storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, a magnetic disk, or A variety of media such as optical discs that can store program code.

Other technical details of this embodiment refer to Embodiment 1.

The exemplary implementation manners of the foregoing embodiments are described in detail below by taking PTRS as an example. It should be noted that the following examples can be arbitrarily combined. In addition, in the actual application, the foregoing embodiments may have other implementation manners. The processes, execution processes, and the like in the following examples may also be adjusted according to actual application requirements.

It should be noted that in all of the examples below, the patterns of the demodulation reference signal and the phase tracking reference signal and the channel state indication reference signal are merely examples, and other implementations in which various forms exist may also be applied to the following examples.

Example 1

In this example, by predefining the correspondence between the power parameters of a PTRS (for example, PTRS power coefficient, PTRS power value, PTRS power offset, etc.) and the MCS level, the transmission power that the PTRS needs to achieve when power enhancement is accurately determined is determined. .

In practical applications, the higher the MCS level in the communication system, the greater the influence of phase noise on the data transmission, and the more accurate phase noise compensation for the PTRS is required, that is, the power requirement of the PTRS is related to the MCS level. If there is a modulation scheme greater than 256 Quadrature Amplitude Modulation (QAM), which is limited by the number of PTRS orthogonal ports and the number of DMRS ports that can be used for frequency division, the PTRS power obtained by the related art cannot be well obtained. The improvement is so that the phase noise compensation cannot be obtained very accurately. When the MCS reaches a certain level, the transmission power of the PTRS needs to be increased as the MCS level is increased.

In this example, one or several MCS level thresholds are preset, and the MCS level thresholds divide the MCS level into one or more MCS level intervals, and set the PTRS power coefficients corresponding to the MCS level intervals, so that the MCS can be learned. The transmission power value of the PTRS is accurately determined at the level.

In an implementation manner of this example, n MCS level thresholds may be set, and power coefficients corresponding to the MCS level intervals defined by the n MCS level thresholds are set. As shown in Table 1, the correspondence between the MCS level interval and the PTRS transmission power in this example is shown. The MCS level thresholds are: MCS1, MCS2, MCS3, ..., MCSn, where n is an integer not less than 1, and X, Y, ..., M are respectively power coefficients corresponding to different MCS level intervals, X>0, Y>0, M>0.

Table 1

As shown in Table 1, when the MCS level is less than MCS4, that is, the MCS level at this time is not very high, the power boosting of PTRS is not performed, or the PTRS transmission power value obtained by the following three methods can be solved. For the compensation of phase noise, set the PTRS power at this time to P1, where the value of P1 can be obtained based on one or more of the following methods: 1) according to whether there is a phase tracking reference signal with zero power; 2) according to whether The power of the phase tracking reference signal is set to be the same as the power of the corresponding demodulation reference signal; and 3) is obtained according to whether the demodulation reference signal is subjected to frequency division multiplexing in the frequency domain. Here, P1 can be determined by the manner corresponding to FIGS. 1 to 3.

As shown in Table 1, when the MCS level is greater than MCS4 and less than MCS5, the power coefficient of the PTRS can be set to X, and the corresponding PTRS transmission power can be determined as X×P1. Similarly, when the MCS level is greater than MCS5 and less than In MCS6, the power coefficient of the PTRS can be set to Y at this time, and the PTRS transmission power can be determined as Y×P1. Similarly, the PRTS power in other cases can be obtained. The power upper limit M×P1 of the PTRS transmission power is not greater than the data power K dB, where K=6, and X and Y may be positive numbers not greater than M.

It should be noted that, since the level of the modulation coding mode currently supported is not completely determined, it cannot be excluded that the modulation coding mode may be applied to 512QAM, 1024QAM or even higher. This example is also applicable to this case.

In this example, when setting the PTRS power parameter, the time density of the PTRS can also be referred to. As shown in Table 1, when the time domain density of PTRS is 1/2 or 1/4, the phase tracking reference signal has little effect, and better phase compensation can be ensured without power enhancement, but when the phase tracking reference signal is When the time domain density is 1, then more accurate phase compensation is required, which in turn requires PTRS power enhancement. Based on this, the correspondence between the MCS level and the PTRS power can be configured for the case where the phase tracking reference signal has a time domain density of not less than one.

In another implementation of this example, for the case where the phase tracking reference signal has a time domain density of not less than 1, the MCS level threshold is calculated from the MCS level when the time domain density is not less than one. Table 2 below is the correspondence between the PTRS power and the MCS level in this case for this case.

Scheduled MCS	Time density	PTRS power
0<=MCS<MCS1	No PTRS
MCS1<=MCS<MCS2	1/4
MCS2<=MCS<MCS3	1/2
MCS3<=MCS<MCS4	1	P1
MCS4<=MCS<MCS5	1	X×P1
MCS5<=MCS<MCS6	1	Y×P1
...	...	...
MCSn-1<=MCS<MCSn	1	M×P1

Table 2

In still another implementation of this example, n MCS level thresholds may be set, and predetermined power values corresponding to the respective MCS level intervals defined by the n MCS level thresholds may be set. As shown in Table 3, different MCS level intervals corresponding to the n MCS level thresholds are configured with different PTRS predetermined power values, wherein P1, P2, P3, ..., Pn-1 are these predetermined power values, respectively. A positive integer not less than one.

Scheduled MCS

Time density

PTRS power

0<=MCS<MCS1	No PTRS	No PTRS
MCS1<=MCS<MCS2	1/4	P1
MCS2<=MCS<MCS3	1/2	P2
MCS3<=MCS<MCS4	1	P3
...	...	...
MCSn-1<=MCS<MCSn	1	Pn-1

table 3

In another implementation manner of this example, different power offsets may be set corresponding to different MCS level intervals on the basis of one base power value P1, as shown in Table 4, where P _b1 , P _b2 . . . P _bm are different power offsets for different MCS levels, respectively.

Table 4

Example 2

In this example, the power enhancement of the phase tracking reference signal can be performed based on the uplink power control.

At present, there are two waveforms in the uplink, namely Orthogonal Frequency Division Multiplexing (CP-OFDM) and Discrete Fourier Transform Spread Orthogonal Frequency Division Multiple Access (DFT-s-OFDM, Discrete). -Fourier-transformspread optical Orthogonal Frequency Division Multiplexed). For CP-OFDM, when 256QAM or higher modulation scheme is applied, the uplink also needs more accurate PTRS for phase compensation, but the uplink has a certain limitation due to the influence of power control.

Since the phase tracking reference signal and the data have a frequency division multiplexing multiplexing mode, the uplink power control also needs to be effective for the phase tracking reference signal. It is assumed that the power upper limit of the i-th symbol uplink power control is P _CMAX,c (i), and the power allocated for the data is P _PUSCH,c (i), which can be used to transmit the power upper limit P of the phase tracking reference signal. _PTRS,c (i) needs to satisfy the following formula (1):

P _PTRS,c (i)=P _CMAX,c (i)-P _PUSCH,c (i) (1)

In this example, the configurations of Table 1 and Table 2 in Example 1 can be used, but the maximum value M×P1 of the phase tracking reference signal power does not exceed the upper power limit obtained by Equation (1). Specifically, the value of M can be obtained according to the value of P1, and the power of the phase tracking reference signals of the remaining levels can be obtained according to the set MCS level threshold.

In the case of power control, if there are multiple MCS level intervals, and the PTRS power difference corresponding to each MCS level interval is not very large, the complexity of system processing will be increased. At this time, the correspondence between the MCS level and the PTRS power can be simplified to reduce the complexity.

In an implementation manner of this example, the configuration shown in Table 5 below may be adopted, where some MCS level intervals may correspond to power coefficients of the same PTRS, that is, multiple MCS level intervals may correspond to the same PTRS power.

table 5

In another implementation manner in this example, the configuration shown in Table 6 below may be adopted, wherein the MCS level interval in which the MCS is higher than a certain value corresponds to the maximum value (M) of the power coefficient of the PTRS. As shown in Table 6, each MCS level interval whose MCS level is not lower than MCS6 corresponds to the same PTRS power M×P1.

Table 6

In Table 5, n-4 PTRS powers corresponding to X to M are divided into K values, each PTRS power corresponds to a plurality of MCS level intervals, and K is an integer not less than 1.

In Table 6, the threshold (MCS6) greater than a certain modulation coding mode level is uniformly corresponding to the maximum value of the PTRS transmission power value, that is, the upper limit corresponding to the PTRS power.

In this example, similarly, Table 2 can be simplified by the above simplified manner to implement the configuration of the correspondence between the MCS level and the PTRS power.

At the same time, since the result of the uplink power control can be obtained at this time, the correspondence between the power enhancement level of the phase tracking reference signal and the modulation and coding mode can adopt the correspondence relationship of Table 7, where P is the PTRS power before the power enhancement, P1 is According to the upper limit of the power of the phase tracking reference signal obtained by Equation 1, the power coefficients (X0, X, Y, ..., M) of the PTRS of P1 are different gradation values of not more than 1.

Table 7

If the uplink and downlink links use the same CP-OFDM waveform for communication, it may be considered to set the correspondence between the uplink and downlink links of the same phase tracking reference signal power enhancement level and the modulation and coding mode level. If the uplink and downlink use the same configuration, it is more convenient, but at this time, the downlink has a certain impact on the compensation effect of the phase tracking reference signal because there is no strict power control requirement. If the uplink and downlink links are configured with different correspondences, it can ensure that the phase tracking reference signal of the downlink can have better compensation effect, and the same system complexity is generated. In a practical application, the specific configuration manner may be determined according to the needs of the actual application environment, and the application is not limited.

Example 3

In this example, the power enhancement of the phase tracking reference signal in the uplink single carrier communication system will be described.

For example, the DFT-s-OFDM used in the uplink single carrier system, that is, the discrete Fourier transform spread spectrum orthogonal frequency division multiplexing multiple access technology scheme, when adding the phase tracking reference signal, most of the cases are Add before the discrete Fourier transform, that is, insert a certain number of phase tracking reference signals into the data samples, as shown in Figure 6.

If there are multiple orthogonal phase tracking reference signals in the uplink single carrier system, if there is a zero power phase tracking reference signal, the power level of the phase tracking reference signal to be configured may be determined according to the number of zero power phase tracking reference signals. As shown in FIG. 7, compared with FIG. 6, the phase tracking reference signal position of the second block inserted in the data is zero-phase phase tracking reference signal, so the appropriate power is applied to the phase tracking reference signal of the first block at this time. Enhancement does not increase the power within the entire symbol. If there is no zero-power phase tracking reference signal, the power of the input phase tracking reference signal can be appropriately increased according to the limitation of the uplink power control.

For the PTRS that does not have zero power as shown in FIG. 8 , the power control may be limited, and a proportional value, that is, the current MCS level, may be appropriately set according to the power of the Physical Layer Uplink Shared Channel (PUSCH). When the value is large, the upper limit value of the PTRS transmission power can be determined based on the following formula:

P _PTRS (i)=A×(P _CMAX,c (i)-P _PUSCH,c (i))

P _PUSCH,c (i)+P _PTRS (i)≤P _CMAX,c (i)

Where P _CMAX,c is the upper limit of the uplink power control, P _PUSCH,c is the power value allocated by the current data, P _PTRS is the power value that can be allocated to the PTRS, and the value of A can be taken as the PTRS power parameter in the above table. (For example, X, Y, ..., M).

Example 4

In this example, the power value of the phase tracking reference signal power enhancement can be determined according to the carrier frequency and the modulation coding mode level.

In high-frequency communication, data transmission is more susceptible to phase noise, that is, the higher the carrier frequency, the more serious the influence of phase noise. Therefore, the phase tracking reference signal should also set different power enhancement levels according to different carrier frequencies.

In an implementation manner of this example, different carrier frequencies select the same threshold of the modulation and coding mode, and 30 GHz and 60 GHz are taken as an example. As shown in Table 8, different carrier frequencies correspond to different phase tracking reference signal power enhancement levels. The PTRS power parameters (X0, X1, Y1, ..., M1) corresponding to the higher frequency corresponding to the modulation coding mode of the same level are larger than the PTRS power parameters (X, Y, ..., M) with lower frequencies.

Table 8

When the carrier frequency is low, the influence of phase noise is relatively small. If power enhancement is required, the transmission power of the phase tracking reference signal may take a relatively low value (for example, setting X, Y, etc. in the table to Relatively small value); when the carrier frequency is high, the influence of phase noise is relatively large. In this case, a higher power enhancement can be performed for the phase tracking reference signal. At this time, the transmission power of the phase tracking reference signal can be relatively Higher values (for example, setting X, Y, etc. in the table to a relatively large value).

For example, in the case of the same MCS level, the phase noise at the 60 GHz carrier frequency is greater than that at the 30 GHz carrier frequency. Therefore, when performing PTRS power enhancement, the values of the PTRS power parameters such as X and Y can be adjusted during configuration. The PTRS transmission power at a carrier frequency of 60 GHz is higher than the PTRS transmission power at a carrier frequency of 30 GHz.

In another implementation of the present example, different carrier frequencies select different modulation and coding modes. In the high frequency system, even if the level of the modulation and coding mode is not particularly high, the phase tracking reference signal also needs to perform certain power enhancement. Therefore, as shown in Table 9, in the case of the same phase tracking reference signal power enhancement factor, the corresponding level of the modulation coding mode level threshold corresponding to the high frequency system is smaller than the modulation coding mode level threshold of the lower frequency system. For example, the MCS level threshold corresponding to the PTRS power of Y×P1 includes MCSh5 of the high frequency system and MCS5 of the low frequency system, wherein MCSh5 is smaller than MCS5.

Table 9

Example 5

The phase tracking reference signal can be power enhanced based on other signals of zero power on other identical time domain sign bits.

If there are other reference signals in the time domain symbol position of the phase tracking reference signal, and there are a certain number of zero power reference signals, such as a sounding reference signal (SRS), the tracking reference signal (TRS, Tracking) Reference signal), CSI-RS or Demodulation Reference Signal (DMRS), and the above reference signal does not have power enhancement, and the phase tracking reference signal can be based on zero power at the same time domain symbol position. A certain amount of power enhancement is performed with the number of reference signals. As shown in Figure 9.

In FIG. 9, there is a zero-power channel state indication reference signal (CSI-RS) on the last two symbols of the slot, and if the power boost of the CSI-RS is not performed at this time, power boosting of the PTRS may be considered. The CSI-RS transmission power corresponding to the zero-power CSI-RS symbol position is allocated to the PTRS according to a certain ratio. The power information of the power boost is performed by the configuration information of the zero-power CSI-RS as the PTRS.

For example, this slot has a total of 2 symbol zero-power CSI-RSs, and the CSI-RS transmission power is P, and at this time according to the MCS level and the allocated bandwidth, and if the power of the PTRS is not boosted, For P2, the transmission power of the PTRS obtained according to the above is P1=P2+P. The value of P1 in the table in the foregoing embodiment may be calculated by referring to the transmission power of the PTRS in the above.

The existence of other zero-power reference signals of the same applicable case is similar to the calculation method of the above zero-power CSI-RS.

Example 6

The correspondence between the MCS level and the PTRS power is related to the waveform, that is, the transmission power of the PTRS is related to the MCS level and the waveform.

Corresponding relationship between the MCS level and the PTRS power related to the waveform configuration for various waveform configurations. For example, when the terminal adopts the CP-OFDM waveform, the power correspondence relationship between the MCS level and the PTRS is configured. As shown in Table 1, the terminal adopts DFT-s- In the OFDM waveform, the power correspondence relationship between the MCS level and the PTRS is configured as shown in Table 3. At this time, the power correspondence between the two MCS levels and the PTRS configured for the two waveforms may be identical, may be completely different, or partially identical.

For different waveforms, a power correspondence relationship between the MCS level and the PTRS corresponding to multiple waveforms can be configured, as shown in Table 10.

Scheduled MCS	PTRS power
0<=MCS<MCSb1	No PTRS
MCSb1<=MCS<MCSb2	Pb1
MCSb2<=MCS<MCSb3	Pb2
MCSb3<=MCS<MCSb4	Pb3
...	...
MCSbn-1<=MCS<MCSbn	Pbn-1
0<=MCS<MCSa1	No PTRS
MCSa1<=MCS<MCSa2	Pa1
MCSa2<=MCS<MCSa3	Pa2
MCSa3<=MCS<MCSa4	Pa3
...	...
MCSam-1<=MCS<MCSam	Pam-1

Table 10

As shown in Table 10, the correspondence relationship between the MCS level and the PTRS power for the two waveforms is configured, wherein the n-1 predetermined power values of Pb1 to Pbn-1 in the table are the first waveform (for example, CP-OFDM waveform). The corresponding PTRS transmission power value of the MCS level interval defined by the n-1 MCS level thresholds, and the m-1 predetermined power values of Pa1 to Pam-1 in Table 10 are the second waveform (for example, DFT-s-OFDM waveform The corresponding PTRS transmission power value corresponding to the MCS level interval defined by the m-1 MCS level thresholds. If the MCS level corresponding to the two waveforms in Table 10 and the predetermined power value corresponding to the MCS level are the same, the same parts can be combined. If a=b, then the two waveforms are considered to be the same MCS. Correspondence with PTRS power.

Two different comparison tables are configured for two different waveforms, so the correspondence between the MCS level and the PTRS power can be selected according to the waveform information used in the current communication. For example, when the waveform selected by the communication is a CP-OFDM waveform, the base station and the terminal can select the correspondence relationship between the MCS level and the PTRS power according to the waveform at this time. If the waveform used by the communication system is the DFT-S-OFDM waveform at this time. Then, the base station and the terminal can select the correspondence relationship 2 between the MCS level and the PTRS power according to the waveform information at this time.

Through the example, the information of the waveform can be used to implicitly indicate the correspondence between the MCS level and the PTRS power, and the transmission power of the PTRS is determined according to the correspondence, so that the PTRS can be transmitted with different powers for different waveforms.

The PTRS power values in all the above tables may or may not be related to the PTRS density.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware (e.g., a processor), which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function. This application is not limited to any specific combination of hardware and software.

The basic principles and main features of the present application and the advantages of the present application are shown and described above. The present application is not limited by the above-described embodiments, and the above-described embodiments and the description are only for explaining the principles of the present application, and various changes and modifications may be made to the present application without departing from the spirit and scope of the application. And improvements are within the scope of the claimed invention.

Industrial applicability

The technical solution of the present disclosure can be applied to the field of communications. The embodiment of the present disclosure determines the transmission power of the reference signal by pre-configuring the correspondence between the MCS level and the reference signal power, and can effectively adjust the reference signal when the high-order modulation mode is applied, thereby improving the phase noise estimation accuracy of the reference signal.

Claims (12)

1. A power configuration method for a reference signal, comprising:

   Pre-configuring the correspondence between the modulation coding mode level and the reference signal power;

   Obtain the current modulation coding mode level;

   The transmission power of the reference signal is determined according to the current modulation coding mode level and the correspondence between the modulation coding mode level and the reference signal power.
2. The power configuration method according to claim 1, wherein

   Corresponding relationship between the modulation coding mode level and the reference signal power includes: a preset modulation coding mode level interval, a power parameter of the reference signal, and a correspondence between the modulation coding mode level interval and the power parameter;

   The power parameter of the reference signal includes at least one of the following parameters:

   Predetermined power value;

   Power offset

   Power factor.
3. The power configuration method according to claim 2, wherein the determining the transmission power of the reference signal according to the current modulation coding mode level and the correspondence between the modulation coding mode level and the reference signal power comprises:

   Determining a modulation coding mode level interval to which the current modulation coding mode level belongs, determining a power parameter of the reference signal based on the modulation coding mode level interval, and obtaining a transmission power of the reference signal based on the determined power parameter.
4. The power configuration method according to claim 2, wherein

   Corresponding relationship between the modulation coding mode level and the reference signal power includes: preset M modulation coding mode level thresholds, power parameters of N reference signals, and modulation coding modes corresponding to the M modulation coding mode level thresholds Correspondence between the level interval and the power parameters of the N reference signals; wherein M is not less than N, and M and N are positive integers, respectively.
5. The power configuration method according to any one of claims 1 to 4, wherein

   The method further includes determining an upper power limit of the reference signal according to an upper power limit of the uplink and a power allocated for data on the uplink;

   Determining the power of the reference signal according to the current modulation coding mode level and the correspondence between the modulation coding mode level and the reference signal power, including: according to the current modulation coding mode level, the modulation coding mode level, and the reference signal power Corresponding relationship, and an upper power limit of the reference signal, determining a transmission power of the reference signal.
6. The power configuration method according to claim 2, wherein

   The method also includes determining a power parameter of the reference signal based on the other reference signals if there are other reference signals of zero power at a time domain symbol position of the reference signal.
7. The power configuration method according to any one of claims 1 to 4, wherein

   The method further includes: configuring a correspondence between a modulation coding mode level corresponding to different frequency domain segments and a reference signal power;

   Determining the reference signal power according to the current modulation coding mode level and the corresponding relationship between the modulation coding mode level and the reference signal power, including: according to the correspondence between the modulation coding mode level and the reference signal power corresponding to the current frequency domain segment, And the current modulation coding mode level, and determining the transmission power of the reference signal.
8. The power configuration method according to claim 7, wherein the correspondence between the modulation coding mode level corresponding to different frequency domain segments and the reference signal power includes one of the following:

   a modulation coding mode level interval of the first frequency domain segment, a correspondence relationship between the modulation coding mode level interval and the reference signal power parameter, and a modulation coding mode level interval of the second frequency domain segment and the modulation coding mode level interval and the Corresponding relationship of reference signal power parameters;

   a reference signal power parameter of the first frequency domain segment and a correspondence between the reference signal power parameter and a modulation coding mode level interval, and a reference signal power parameter of the second frequency domain segment and the reference signal power parameter and the modulation code The correspondence between the mode level intervals.
9. The power configuration method according to claim 1, wherein the correspondence relationship between the modulation coding mode level and the reference signal power is related to a waveform.
10. A power configuration device for a reference signal, comprising:

    The configuration module is configured to pre-configure a correspondence between a modulation coding mode level and a reference signal power;

    Obtaining a module, configured to obtain a current modulation coding mode level;

    The determining module is configured to determine a transmit power of the reference signal according to a current modulation coding mode level and a correspondence between the modulation coding mode level and a reference signal power.
11. A power configuration device for a reference signal, comprising:

    a memory of a power configuration program storing a reference signal;

    A processor configured to read a power configuration program of the reference signal to perform the operations of the method of any one of claims 1 to 9.
12. A computer readable storage medium having stored thereon a power configuration program of a reference signal, the power configuration program of the reference signal being executed by a processor to implement any one of claims 1 to 9 The steps of the power configuration method of the reference signal.

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