CN111491319B - Method and device for determining path loss, storage medium and terminal - Google Patents
Method and device for determining path loss, storage medium and terminal Download PDFInfo
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- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
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Abstract
A method and a device for determining path loss, a storage medium and a terminal are provided, the method comprises the following steps: searching a periodic reference signal having QCL relation with the path loss reference signal and recording the periodic reference signal as a compensation reference signal; and when the reference signal closest to the sending point is the compensation reference signal, compensating the path loss value of the path loss reference signal based on the path loss value of the compensation reference signal to obtain a compensated path loss value. The scheme provided by the invention can improve the real-time performance and the accuracy of the path loss calculation and enhance the performance of the uplink power control of the NR terminal.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for determining a path loss, a storage medium, and a terminal.
Background
Generally, before a New Radio (NR) terminal performs uplink transmission, a path loss value is calculated and added to other items of uplink power control, so as to obtain a final uplink transmission power. Based on this, the conventional processing procedure of the existing NR terminal is: according to an Uplink Channel (such as a Physical Random Access Channel (PRACH), a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH)) or a Signal (such as a Channel Sounding Reference Signal (SRS)) to be transmitted by an NR terminal, a Path Loss (Path Loss) Reference Signal (RS) closest to a transmission point is selected according to a protocol specification of a third Generation Partnership Project (3 GPP) and network side configuration, and a Path Loss value and a final Uplink transmission power value are calculated.
However, if the period of the path loss reference signal used for calculating the path loss is long or the path loss reference signal is far from the transmission point, the real-time performance and accuracy of the path loss value calculated based on the path loss reference signal may be reduced, thereby affecting the performance of the uplink power control of the NR terminal.
Disclosure of Invention
The technical problem solved by the invention is how to improve the real-time performance and the accuracy of the path loss calculation and enhance the performance of the uplink power control of the NR terminal.
To solve the foregoing technical problem, an embodiment of the present invention provides a method for determining a path loss, including: searching a periodic reference signal having QCL relation with the path loss reference signal and recording the periodic reference signal as a compensation reference signal; and when the reference signal closest to the sending point is the compensation reference signal, compensating the path loss value of the path loss reference signal based on the path loss value of the compensation reference signal to obtain a compensated path loss value.
Optionally, the searching for the periodic reference signal having a QCL relationship with the path loss reference signal includes: looking up a periodic reference signal having a QCL relationship with the path loss reference signal in a network configured and activated TCI state, wherein the TCI state comprises the periodic reference signal having the QCL relationship with the path loss reference signal.
Optionally, the TCI status is obtained at least from: a control resource set domain of the PDCCH; activating a PDSCH; non-zero power channel state information reference signal resource domain.
Optionally, the searching for the periodic reference signal having the QCL relationship with the path loss reference signal further includes: and if the periodic reference signal with QCL relation with the path loss reference signal is not found in the TCI state configured and activated by the network, determining the SSB associated with the path loss reference signal as the compensation reference signal.
Optionally, the ID of the SSB and/or the ID of the TCI status are the same as the ID of the serving cell.
Optionally, the compensating the path loss value of the path loss reference signal based on the path loss value of the compensation reference signal to obtain a compensated path loss value includes: calculating a path loss value of the compensation reference signal and a path loss value of the path loss reference signal; training a path loss energy relation between the path loss value of the compensation reference signal and the path loss value of the path loss reference signal; and compensating the path loss value of the path loss reference signal based on the path loss energy relation to obtain a compensated path loss value.
Optionally, the training of the path loss energy relationship between the path loss value of the compensation reference signal and the path loss value of the path loss reference signal includes: fitting the path loss value of the compensation reference signal by taking the path loss value of the path loss reference signal as a target; and when the error between the fitting result and the path loss value of the path loss reference signal is smaller than a preset tolerance value, determining the fitting result as the path loss energy relation.
Optionally, the compensating the path loss value of the path loss reference signal based on the path loss energy relationship to obtain a compensated path loss value includes: when the number of the compensation reference signals is multiple, determining the priority of the path loss energy relation of each compensation reference signal according to the strong and weak correlation of the large-scale characteristic between each compensation reference signal and the path loss reference signal; and adding the weighted summation result of the path loss energy relationship of each of the plurality of compensation reference signals to the path loss value of the path loss reference signal to obtain a compensated path loss value, wherein the weight of the path loss energy relationship of each compensation reference signal in the weighted summation is determined according to the priority of the path loss energy relationship of each compensation reference signal.
Optionally, the stronger the correlation of the large-scale characteristic is, the higher the priority of the path loss energy relationship of the compensation reference signal is.
Optionally, the strength of the correlation of the large-scale characteristic is determined according to a QCL type to which a QCL relationship between the compensation reference signal and the path loss reference signal belongs.
Optionally, the path loss reference signal is a candidate path loss reference signal closest to the sending point in candidate path loss reference signals configured by a network or a protocol.
To solve the foregoing technical problem, an embodiment of the present invention further provides a path loss determining apparatus, including: the searching module is used for searching a periodic reference signal which has QCL relation with the path loss reference signal and recording the periodic reference signal as a compensation reference signal; and the compensation module is used for compensating the path loss value of the path loss reference signal based on the path loss value of the compensation reference signal to obtain a compensated path loss value when the reference signal closest to the sending point is the compensation reference signal.
To solve the foregoing technical problem, an embodiment of the present invention further provides a storage medium, on which computer instructions are stored, and when the computer instructions are executed by a processor, the computer instructions perform the steps of the foregoing method.
In order to solve the foregoing technical problem, an embodiment of the present invention further provides a terminal, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the computer instructions to perform the steps of the foregoing method when executing the computer instructions
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a method for determining path loss, which comprises the following steps: searching a periodic reference signal having QCL relation with the path loss reference signal and recording the periodic reference signal as a compensation reference signal; and when the reference signal closest to the sending point is the compensation reference signal, compensating the path loss value of the path loss reference signal based on the path loss value of the compensation reference signal to obtain a compensated path loss value.
Compared with the existing path loss calculation process, the scheme of the embodiment can improve the real-time performance and the accuracy of path loss calculation and enhance the performance of uplink power control of the NR terminal. Specifically, on the premise that the protocol and the path loss reference signal configured on the network side are continuously adopted to calculate the path loss value, other periodic reference signal resources having a QCL relationship with the path loss reference signal are enabled, so that the time density of uplink path loss calculation is increased, the uplink transmission can be ensured to use the path loss value with higher real-time performance and more accuracy, and the uplink power control performance is enhanced. Further, when the compensation operation is judged to be executed according to whether the compensation reference signal is closer to the sending point than the path loss reference signal or not, the compensation operation can be immediately carried out without waiting for a protocol or a TPC command of a network side, so that the real-time compensation of the filtered path loss value becomes possible. Therefore, when the NR terminal according to the embodiment calculates the path loss value using the reference signal, the real-time performance and accuracy of the path loss value closest to the transmission point can be effectively improved without affecting the calculation of the path loss value based on the protocol and the path loss reference signal configured on the network side.
Further, calculating a path loss value of the compensation reference signal and a path loss value of the path loss reference signal; training a path loss energy relation between the path loss value of the compensation reference signal and the path loss value of the path loss reference signal; and compensating the path loss value of the path loss reference signal based on the path loss energy relation to obtain a compensated path loss value. The existence of the QCL relationship means that an energy correlation, such as a power correspondence, exists between the two path loss values. Therefore, the scheme of the embodiment compensates the path loss value of the path loss reference signal by finding out the specific path loss energy relationship between the two. The corresponding path loss value is simulated by fitting the compensation reference signal to the path loss reference signal according to the QCL relationship, and the actually measured path loss value of the path loss reference signal is compensated and corrected according to the simulation result.
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Fig. 1 is a flow chart of a method of determining path loss according to an embodiment of the present invention;
FIG. 2 is a flowchart of one embodiment of step S102 of FIG. 1;
fig. 3 is a schematic structural diagram of a path loss determining apparatus according to an embodiment of the present invention.
Detailed Description
As background art, before a mobile communication terminal (e.g. an NR terminal) performs uplink transmission, in order to obtain accurate uplink transmission power, a protocol and a path loss reference signal configured on a network side (i.e. a network side) are usually used to calculate a path loss value. However, the period of the path loss reference signal may be longer or farther from the transmission point, and the real-time performance and accuracy of the path loss value may be reduced, so as to increase the error of the uplink transmission power and finally affect the performance of the uplink power control.
In general, the conventional treatments are: all transmissions upstream of the NR (including PRACH, PUCCH, PUSCH, SRS) specify a path loss Reference Signal (including a Synchronization Signal Block (SSB)) and a Non-Zero Power Channel State Information Reference Signal (NZP-CSI-RS)) to calculate a path loss value according to the correlation description in section 7 of the 3GPP protocol 38.213. And after filtering the calculated instantaneous path loss value, the instantaneous path loss value is used for calculating the final uplink transmission power. If the uplink transmission Power has an error, the network side can adjust the uplink transmission Power in a closed loop through a Transmit Power Control (TPC) command.
However, there is a certain time delay in the adjustment of the TPC command through closed-loop power control, and at this time, if the period of the path loss reference signal is long or is far from the transmission point, the errors of the path loss value obtained by the NR terminal and the final uplink transmission power value will become large, resulting in a decrease in the performance of uplink power control.
Specifically, according to the description in section 7 of the 3gpp 38.213 protocol, there are four types of uplink transmissions of NR, including PRACH, PUCCH, PUSCH, and SRS, and the calculation formulas of the uplink transmission power are as follows:
PRACH：
PUCCH：
PUSCH：
SRS：
wherein PL of PRACH b,f,c PL with PUCCH/PUSCH/SRS b,f,c (q d ) All are path loss calculation items, which indicate that all the power calculations of uplink transmission include path loss calculation items. Therefore, the calculation of the NR uplink transmission power can be divided into Path Loss (Path Loss) calculation, calculation of other items of uplink power control, and total transmission power limitation.
The performance of NR uplink power control is determined by the above three steps. The Path Loss (Path Loss) calculation in this step has all uplink transmit power calculations, which is also the main optimization direction of the scheme of the present invention.
According to the description in section 7 of the 3gpp 38.213 protocol, for all uplink channels of the NR (including PRACH, PUCCH, PUSCH, and SRS), the protocol and the network side all specify or configure a path loss reference signal, and the NR terminal calculates a path loss value using the path loss reference signal. There are two options for the path loss reference signal: the SSB and a Channel State Information Reference Signal (CSI-RS).
According to the description of the path loss reference signal in the 3gpp 38.331 protocol, the network side specifies the SSB and CSI-RS by the SSB Index (SSB-Index) and CSI-RS Index (CSI-RS-Index), respectively, and the type of the CSI-RS is NZP-CSI-RS.
Wherein, the SSB must be periodic, and most of the CSI-RS should also be periodic. The inventor of the present application finds, through analysis, that the configuration of the uplink power Control path loss reference signal is a message in a Radio Resource Control (RRC) layer, and the configuration is not updated frequently. Therefore, when the path loss reference signal is configured as the CSI-RS, the probability is the periodic NZP-CSI-RS.
For SSB, the period can be up to 160ms for maximum, whether it is broadcast by System Information Block 1 (SIB 1) or RRC reconfiguration.
And for the periodic NZP-CSI-RS, the period can reach 640 slots (slots) at maximum. When the sub-carrier space (SCS for short) of the NR NZP-CSI-RS is 30KHz, the maximum period is 320ms; with 15KHz SCS, the maximum period is up to 640ms.
It can be seen that, before uplink transmission, if the period of the path loss reference signal is long (e.g., 160ms of SSB or 320ms of CSI-RS), or is far away from the transmission point (e.g., the path loss reference signal is transmitted at the end of the SSB or CSI-RS period), the real-time performance and accuracy of the path loss value calculated by the NR terminal based on the path loss reference signal may be reduced.
According to the description in section 4.4.1 of the 3GPP protocol 38.211, quasi co-location (QCL) indicates that there is a correlation between the uplink and downlink transceiving channels or signals, such as time delay, doppler shift, signal power, or spatial characteristics on a large scale.
QCL relationships may specifically include: delay spread (delay spread), doppler spread (Doppler spread), doppler shift (Doppler shift), average gain (average delay), average delay (average delay), and spatial Rx parameters.
Also, according to the description in section 5.1.5 of 3GPP protocol 38.214, QCL types can be classified into four types based on different numbers or kinds of correlation characteristics:
-'QCL-TypeA':{Doppler shift,Doppler spread,average delay,delay spread}
-'QCL-TypeB':{Doppler shift,Doppler spread}
-'QCL-TypeC':{Doppler shift,average delay}
-'QCL-TypeD':{Spatial Rx parameter}
in order to solve the problem of poor real-time performance and accuracy of the path loss calculation, the inventor of the present application finds that other periodic reference signal resources having a QCL relationship with the path loss reference signal can be activated by using the correlation of the large-scale characteristic. The real-time performance and the accuracy of the uplink loss calculation are improved by increasing the time density of the uplink loss calculation.
Specifically, an embodiment of the present invention provides a method for determining a path loss, including: searching a periodic reference signal having a QCL relation with the path loss reference signal, and recording the periodic reference signal as a compensation reference signal; and when the reference signal closest to the sending point is the compensation reference signal, compensating the path loss value of the path loss reference signal based on the path loss value of the compensation reference signal to obtain a compensated path loss value.
By adopting the scheme of the embodiment, the real-time performance and the accuracy of the path loss calculation can be improved, and the performance of the uplink power control of the NR terminal is enhanced. Specifically, on the premise that the protocol and the path loss reference signal configured on the network side are continuously adopted to calculate the path loss value, other periodic reference signal resources having a QCL relationship with the path loss reference signal are started, so that the time density of uplink path loss calculation is increased, and it is ensured that the uplink transmission can use a path loss value with higher real-time performance and more accuracy, thereby enhancing the uplink power control performance. Further, when the compensation operation is judged to be executed according to whether the compensation reference signal is closer to the sending point than the path loss reference signal, the compensation operation can be immediately carried out without waiting for a protocol or a TPC command of a network side, so that the real-time compensation of the filtered path loss value becomes possible. Therefore, when the NR terminal according to the embodiment calculates the path loss value using the reference signal, the real-time performance and accuracy of the path loss value closest to the transmission point can be effectively improved without affecting the calculation of the path loss value based on the protocol and the path loss reference signal configured on the network side.
Further, calculating a path loss value of the compensation reference signal and a path loss value of the path loss reference signal; training a path loss energy relation between the path loss value of the compensation reference signal and the path loss value of the path loss reference signal; and compensating the path loss value of the path loss reference signal based on the path loss energy relation to obtain a compensated path loss value. The existence of the QCL relationship means that an energy correlation, such as a power correspondence, exists between the two path loss values. Therefore, the scheme of the embodiment compensates the path loss value of the path loss reference signal by finding out the specific path loss energy relationship between the two. The corresponding path loss value is simulated by fitting the compensation reference signal to the path loss reference signal according to the QCL relationship, and the actually measured path loss value of the path loss reference signal is compensated and corrected according to the simulation result.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a flowchart of a method for determining a path loss according to an embodiment of the present invention. The scheme of the embodiment can be executed by a mobile communication terminal, such as an NR terminal. The scheme of the embodiment can be applied to an uplink transmission power calculation scenario before uplink transmission.
Specifically, referring to fig. 1, the method for determining a path loss according to this embodiment may include the following steps:
step S101, searching a periodic reference signal having QCL relation with a path loss reference signal and recording the periodic reference signal as a compensation reference signal;
and step S102, when the reference signal closest to the sending point is the compensation reference signal, compensating the path loss value of the path loss reference signal based on the path loss value of the compensation reference signal to obtain a compensated path loss value.
More specifically, the path loss reference signal may be a candidate path loss reference signal closest to the transmission point among candidate path loss reference signals configured by a network or a protocol. The transmission point is an uplink transmission time point, that is, a time point of an uplink channel/signal to be transmitted.
Further, if the reference signal closest to the sending point is still the path loss reference signal, the final path loss value is directly calculated based on the path loss reference signal configured by the protocol or the network side.
In one implementation, for any periodic reference signal, the QCL relationship of the periodic reference signal is indicated by a TCI state (TCI-state) except for the SSB when not specified by the network side.
Specifically, if the serving cell does not specify other periodic reference signals with which there is a QCL relationship in the TCI state of a certain periodic reference signal, the SSB is associated by default. For all periodic reference signals, except the foregoing, other periodic reference signals should be able to find corresponding indications in the TCI state, and thus determine that the periodic reference signal associated with the TCI state has QCL relationship.
In the power control scenario, if the ID of the SSB and/or the ID of the TCI status are the same as the ID of the serving cell, the foregoing indication is also applied.
In the scheme of the embodiment, based on the aforementioned indication information, when the path loss reference signal is a periodic reference signal, the periodic reference signal with which the QCL relationship exists is determined according to the indication information and/or the SSB in the TCI state of the path loss reference signal.
Accordingly, the step S101 may include the steps of: looking up a periodic reference signal having a QCL relationship with the path loss reference signal in a network configured and activated TCI state, wherein the TCI state includes the periodic reference signal having the QCL relationship with the path loss reference signal.
The network configured and activated TCI state may include all TCI states configured and activated by the network in which the NR terminal is currently located.
Further, the step S101 may further include the steps of: and if the periodic reference signal having the QCL relationship with the path loss reference signal is not found in the network configuration and activated TCI state, determining the SSB associated with the path loss reference signal as the compensation reference signal.
In one implementation, the TCI status may be obtained from at least: a control resource set region of the PDCCH; activating a PDSCH; non-zero power channel state information reference signal resource domain.
For example, when the path loss reference signal is a periodic NZP-CSI-RS, if another periodic reference signal (SSB or NZP-CSI-RS) is specified in an RRC Resource Element (RE) field through a TCI state, the periodic reference signal may be used as a compensation reference signal having a QCL relationship with the path loss reference signal.
In one implementation, if N compensating reference signals are found in step S101, the N compensating reference signals may be numbered as: QCL _ RS (N), where N =1,2, \8230, N, and 1 ≦ N.
In one implementation, referring to fig. 2, the step S102 may include the following steps:
step S1021, calculating a path loss value of the compensation reference signal and a path loss value of the path loss reference signal;
step S1022, train a path loss energy relationship between the path loss value of the compensation reference signal and the path loss value of the path loss reference signal;
and S1023, compensating the path loss value of the path loss reference signal based on the path loss energy relation to obtain a compensated path loss value.
Specifically, the existence of the QCL relationship means that there is an energy correlation, such as a correspondence of power, between two path loss values. Therefore, the scheme of the embodiment compensates the path loss value of the path loss reference signal by finding out the specific path loss energy relationship between the two. The corresponding path loss value is simulated by fitting the compensation reference signal to the path loss reference signal according to the QCL relationship, and the actually measured path loss value of the path loss reference signal is compensated and corrected according to the simulation result.
In one implementation, the step S1022 may include the steps of: fitting the path loss value of the compensation reference signal by taking the path loss value of the path loss reference signal as a target; and when the error between the fitting result and the path loss value of the path loss reference signal is smaller than a preset tolerance value, determining the fitting result as the path loss energy relation.
For example, the path loss value of the path loss reference signal is denoted as P PL_RS The path loss value of the compensated reference signal is recorded as P QCL_RS The trained energy relationship of the path loss can be described as P PL_RS ＝f(P QCL_RS )。
The fitting method may employ curve fitting or the like.
The Error between the fitting result and the path loss value of the path loss reference signal may be characterized based on Mean Squared Error (MSE for short).
The specific value of the preset tolerance value can be determined based on the following considerations: for example, based on mean square error MSE, referring to the constraint on uplink transmission tolerance in 3GPP protocol 38.101-1, MSE may be considered to be 1, i.e., the deviation does not exceed +/-1dB.
In one implementation, the step S1023 may include the steps of: when the number of the compensation reference signals is multiple, determining the priority of the path loss energy relation of each compensation reference signal according to the strong and weak correlation of the large-scale characteristic between each compensation reference signal and the path loss reference signal; and adding the weighted sum result of the path loss energy relationship of each of the plurality of compensation reference signals to the path loss value of the path loss reference signal to obtain a compensated path loss value, wherein the weight of the path loss energy relationship of each compensation reference signal in the weighted sum is determined according to the priority of the path loss energy relationship of each compensation reference signal.
Specifically, the stronger the correlation of the large-scale characteristic, the higher the priority of the path loss energy relationship of the compensation reference signal.
Further, the correlation strength of the large-scale characteristic may be determined according to a QCL type to which a QCL relationship between the compensation reference signal and the path loss reference signal belongs.
For example, the priority order from high to low is: QCL Type A > QCL Type B > QCL Type C > QCL Type D. In practical application, the proper priority order can be determined through simulation or actual measurement and the like.
In this embodiment, different priorities are set according to QCL types between the compensation reference signal and the path loss reference signal, and the different priorities correspond to different weights Pri QCL_Type . For example, the higher the priority, the greater the weight.
For the nth compensation reference signal, the weight Pri of the path loss energy relationship between the compensation reference signal and the path loss reference signal during compensation can be determined according to the corresponding priority QCL_Type . Further obtaining a compensation value C of the nth compensation reference signal QCL _ RS (n) acting on the path loss reference signal PL_RS (QCL_RS(n))＝Pri QCL_Type ×f(P QCL_RS ) Wherein 0 is not more than Pri QCL_Type ≤1，n＝1,2,…,N。
Further, the compensated path loss value may be represented as P Final_PL_RS ＝P PL_RS +C PL_RS (QCL_RS(1))+C PL_RS (QCL_RS(2))+…+C PL_RS (QCL _ RS (N)), where N =1,2, \8230;, N.
In a specific implementation, if the search result in step S101 is that there is no other periodic reference signal having a QCL relationship with the path loss reference signal, the final path loss value is calculated by directly using the path loss reference signal configured by the protocol or the network side.
In one implementation, when the number of the compensating reference signals is multiple, distances from the compensating reference signal closest to the transmission point and distances from the path loss reference signals to the transmission point may be compared to determine whether to perform step S102. Here, the distance refers to a deviation in time.
Alternatively, when the number of the compensation reference signals is plural, distances from respective transmission points of the compensation reference signal farthest from the transmission point and the path loss reference signal may be compared to determine whether to perform step S102.
Therefore, the scheme of the embodiment can improve the real-time performance and the accuracy of the path loss calculation and enhance the performance of the uplink power control of the NR terminal.
Specifically, on the premise that the protocol and the path loss reference signal configured on the network side are continuously adopted to calculate the path loss value, other periodic reference signal resources having a QCL relationship with the path loss reference signal are started, so that the time density of uplink path loss calculation is increased, and it is ensured that the uplink transmission can use a path loss value with higher real-time performance and more accuracy, thereby enhancing the uplink power control performance.
Further, when the compensation operation is judged to be executed according to whether the compensation reference signal is closer to the sending point than the path loss reference signal or not, the compensation operation can be immediately carried out without waiting for a protocol or a TPC command of a network side, so that the real-time compensation of the filtered path loss value becomes possible.
Therefore, when the NR terminal according to the embodiment calculates the path loss value using the reference signal, the real-time performance and accuracy of the path loss value closest to the transmission point can be effectively improved without affecting the calculation of the path loss value based on the protocol and the path loss reference signal configured on the network side.
In a variation of this embodiment, for the N compensation reference signals obtained by the search, the compensation value of each compensation reference signal acting on the path loss reference signal may be calculated immediately after the search operation is completed, so as to be used later.
Further, in step S102, if the transmission point closest to the transmission point is a compensation reference signal, the compensation value determined in the previous period is used to compensate the path loss value of the path loss reference signal. Otherwise, if the path loss reference signal is closest to the transmission point, the previously determined compensation value is temporarily not used, and the final path loss value is determined only based on the path loss value of the path loss reference signal.
In a variation of this embodiment, the distances from all the searched compensation reference signals to the transmission point and the distances from the path loss reference signals to the transmission point may be compared one by one, and the path loss value of the path loss reference signal may be compensated according to the path loss value of the compensation reference signal closer to the transmission point than the path loss reference signal.
Fig. 3 is a schematic structural diagram of a path loss determining apparatus according to an embodiment of the present invention. Those skilled in the art understand that the path loss determining apparatus 3 according to this embodiment may be used to implement the method technical solutions described in the embodiments of fig. 1 and fig. 2.
Specifically, referring to fig. 3, the path loss determining apparatus 3 according to this embodiment may include: a searching module 31, configured to search for a periodic reference signal having a QCL relationship with the path loss reference signal, and record the periodic reference signal as a compensation reference signal; and the compensation module 32 is configured to, when the reference signal closest to the transmission point is the compensation reference signal, compensate the path loss value of the path loss reference signal based on the path loss value of the compensation reference signal to obtain a compensated path loss value.
For more contents of the operation principle and the operation mode of the path loss determining apparatus 3, reference may be made to the relevant description in fig. 1 and fig. 2, and details are not repeated here.
Further, the embodiment of the present invention also discloses a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the technical solution of the method described in the embodiments shown in fig. 1 and fig. 2 is executed. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transient) memory. The storage medium may include ROM, RAM, magnetic or optical disks, etc.
Further, an embodiment of the present invention further discloses a terminal, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the technical solution of the method in the embodiment shown in fig. 1 and fig. 2 when executing the computer instructions. The terminal may be an NR terminal, and the NR terminal includes but is not limited to a mobile phone.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (13)
1. A method for determining a path loss, comprising:
searching a periodic reference signal having a QCL relation with the path loss reference signal, and recording the periodic reference signal as a compensation reference signal;
when the reference signal closest to the sending point is the compensation reference signal, compensating the path loss value of the path loss reference signal based on the path loss value of the compensation reference signal to obtain a compensated path loss value;
wherein the compensating the path loss value of the path loss reference signal based on the path loss value of the compensation reference signal to obtain a compensated path loss value comprises:
calculating a path loss value of the compensation reference signal and a path loss value of the path loss reference signal;
training a path loss energy relation between the path loss value of the compensation reference signal and the path loss value of the path loss reference signal;
and compensating the path loss value of the path loss reference signal based on the path loss energy relation to obtain a compensated path loss value.
2. The method of claim 1, wherein the finding the periodic reference signal having a QCL relationship with the path loss reference signal comprises:
looking up a periodic reference signal having a QCL relationship with the path loss reference signal in a network configured and activated TCI state, wherein the TCI state comprises the periodic reference signal having the QCL relationship with the path loss reference signal.
3. The method of claim 2, wherein the TCI status is obtained from at least: a control resource set region of the PDCCH; activating a PDSCH; non-zero power channel state information reference signal resource domain.
4. The method of claim 2, wherein the finding the periodic reference signal having a QCL relationship with the path loss reference signal further comprises:
and if the periodic reference signal with QCL relation with the path loss reference signal is not found in the TCI state configured and activated by the network, determining the SSB associated with the path loss reference signal as the compensation reference signal.
5. The method of claim 4, wherein the ID of the SSB and/or the ID of the TCI state are the same as the ID of the serving cell.
6. The method according to claim 1, wherein the training of the path loss energy relationship between the path loss value of the compensation reference signal and the path loss value of the path loss reference signal comprises:
fitting the path loss value of the compensation reference signal by taking the path loss value of the path loss reference signal as a target;
and when the error between the fitting result and the path loss value of the path loss reference signal is smaller than a preset tolerance value, determining the fitting result as the path loss energy relation.
7. The method of claim 1, wherein the compensating for the path loss value of the path loss reference signal based on the path loss energy relationship to obtain a compensated path loss value comprises:
when the number of the compensation reference signals is multiple, determining the priority of the path loss energy relation of each compensation reference signal according to the strong and weak correlation of the large-scale characteristic between each compensation reference signal and the path loss reference signal;
and adding the weighted sum result of the path loss energy relationship of each of the plurality of compensation reference signals to the path loss value of the path loss reference signal to obtain a compensated path loss value, wherein the weight of the path loss energy relationship of each compensation reference signal in the weighted sum is determined according to the priority of the path loss energy relationship of each compensation reference signal.
8. The method according to claim 7, wherein the stronger the correlation of the large-scale characteristic, the higher the priority of the path loss energy relationship of the compensation reference signal.
9. The method of claim 7, wherein the large-scale characteristic has a strong or weak correlation determined according to a QCL type to which a QCL relationship between the compensation reference signal and the path loss reference signal belongs.
10. The method according to any one of claims 1 to 9, wherein the path loss reference signal is a candidate path loss reference signal closest to the transmission point among candidate path loss reference signals configured by a network or a protocol.
11. A path loss determining apparatus, comprising:
the searching module is used for searching the periodic reference signal which has QCL relation with the path loss reference signal and recording the periodic reference signal as a compensation reference signal;
the compensation module is used for compensating the path loss value of the path loss reference signal based on the path loss value of the compensation reference signal to obtain a compensated path loss value when the reference signal closest to the sending point is the compensation reference signal;
wherein the compensation module performs the steps of:
calculating a path loss value of the compensation reference signal and a path loss value of the path loss reference signal;
training a path loss energy relation between the path loss value of the compensation reference signal and the path loss value of the path loss reference signal;
and compensating the path loss value of the path loss reference signal based on the path loss energy relation to obtain a compensated path loss value.
12. A storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the method of any one of claims 1 to 10.
13. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor executes the computer instructions to perform the steps of the method of any one of claims 1 to 10.
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