CN114389785A - Method and device for adjusting reference signal, terminal and network side equipment - Google Patents

Method and device for adjusting reference signal, terminal and network side equipment Download PDF

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CN114389785A
CN114389785A CN202011113008.0A CN202011113008A CN114389785A CN 114389785 A CN114389785 A CN 114389785A CN 202011113008 A CN202011113008 A CN 202011113008A CN 114389785 A CN114389785 A CN 114389785A
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reference signal
network side
time delay
terminal
information
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CN114389785B (en
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任千尧
孙鹏
宋扬
塔玛拉卡·拉盖施
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Vivo Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0079—Receiver details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter

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Abstract

The application discloses a method and a device for adjusting a reference signal, a terminal and network side equipment, and belongs to the technical field of communication. Wherein, the method comprises the following steps: acquiring first information; performing a first operation according to the first information, wherein the first operation comprises at least one of: adjusting a receiving time of the received first reference signal; performing time domain or frequency domain compensation on the calculation result of the first reference signal; it is determined whether to perform timing calibration. By the method and the device, the problem that in the prior art, the throughput of downlink transmission is reduced due to the fact that the indication of the network to the reference signal is not matched with the measurement result of the terminal side to the reference signal can be solved.

Description

Method and device for adjusting reference signal, terminal and network side equipment
Technical Field
The application belongs to the technical field of communication, and particularly relates to a method and device for adjusting a reference signal, a terminal and network side equipment.
Background
In a partial reciprocity system, a network performs channel estimation based on an SRS (Sounding Reference Signal) sent by a terminal to obtain an impulse response of an uplink channel, so as to obtain a time delay and an amplitude of each path of a multipath channel, but there may be a decrease in throughput of downlink transmission due to mismatching between an indication of the network for a Reference Signal and a measurement result of the terminal side for the Reference Signal.
Disclosure of Invention
The embodiment of the application provides a method and a device for adjusting a reference signal, a terminal and a network side device, which can solve the problem that in the prior art, the throughput of downlink transmission is reduced due to the fact that the indication of a network to the reference signal is not matched with the measurement result of the terminal side to the reference signal.
In a first aspect, a method for adjusting a reference signal is provided, which is performed by a terminal and includes: acquiring first information; performing a first operation according to the first information, wherein the first operation comprises at least one of: adjusting a receiving time of the received first reference signal; performing time domain or frequency domain compensation on the calculation result of the first reference signal; it is determined whether to perform timing calibration.
In a second aspect, an apparatus for adjusting a reference signal is provided, including: the acquisition module is used for acquiring first information; an execution module, configured to execute a first operation according to the first information, where the first operation includes at least one of: adjusting a receiving time of the received first reference signal; performing time domain or frequency domain compensation on the calculation result of the first reference signal; it is determined whether to perform timing calibration.
In a third aspect, a method for adjusting a reference signal is provided, where the method is performed by a network side device, and includes: and transmitting the first information and the reference signal to the terminal.
In a fourth aspect, an apparatus for adjusting a reference signal is provided, including: and the sending module is used for sending the first information and the reference signal to the terminal.
In a fifth aspect, there is provided a terminal comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, performs the steps of the method according to the first aspect.
In a sixth aspect, a network-side device is provided, which comprises a processor, a memory, and a program or instructions stored on the memory and executable on the processor, and when executed by the processor, the program or instructions implement the steps of the method according to the first aspect.
In a seventh aspect, there is provided a readable storage medium on which a program or instructions are stored, which program or instructions, when executed by a processor, implement the steps of the method according to the first aspect, or implement the steps of the method according to the third aspect.
In an eighth aspect, a chip is provided, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a network-side device program or instruction, implement the method according to the first aspect, or implement the method according to the third aspect.
In this embodiment of the present application, if a situation that the indication of the network for the reference signal and the measurement result of the terminal for the reference signal do not match occurs, the terminal may adjust the receiving time of the received first reference signal according to the first information, or perform time domain or frequency domain compensation on the calculation result of the first reference signal, so that the indication of the network for the reference signal and the measurement result of the terminal for the reference signal match; the reference signal is adjusted after the timing calibration that has been performed before is used, or the current channel state changes, and the timing calibration needs to be performed again if the parameters of the timing calibration cannot be used any more before, and then the reference signal is adjusted. That is to say, through the manner in the embodiment of the present application, the reference signal may be adjusted so that the indication of the network for the reference signal matches the measurement result of the terminal for the reference signal, thereby solving the problem in the prior art that the throughput of downlink transmission is reduced due to the mismatch between the indication of the network for the reference signal and the measurement result of the terminal for the reference signal, and achieving the effect of improving the throughput of downlink transmission.
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FIG. 1 illustrates a block diagram of a wireless communication system to which embodiments of the present application are applicable;
fig. 2 is a first flowchart of a method for adjusting a reference signal according to an embodiment of the present disclosure;
fig. 3 is a second flowchart of a method for adjusting a reference signal according to an embodiment of the present application;
fig. 4 is a first schematic diagram of an amplitude of an impulse response of a downlink channel obtained by a terminal performing channel estimation according to a CSI-RS configured by a network in an embodiment of the present application;
fig. 5 is a schematic diagram two of an amplitude of an impulse response of a downlink channel obtained by a terminal performing channel estimation according to a CSI-RS configured by a network in the embodiment of the present application;
fig. 6 is a first schematic structural diagram of an apparatus for adjusting a reference signal in an embodiment of the present application;
fig. 7 is a second schematic structural diagram of an apparatus for adjusting a reference signal in an embodiment of the present application;
fig. 8 is a schematic structural diagram of a communication device in an embodiment of the present application;
fig. 9 is a schematic hardware structure diagram of a terminal implementing the embodiment of the present application;
fig. 10 is a schematic structural diagram of a network-side device for implementing an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived from the embodiments given herein by a person of ordinary skill in the art are intended to be within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used are interchangeable under appropriate circumstances such that embodiments of the application can be practiced in sequences other than those illustrated or described herein, and the terms "first" and "second" used herein generally do not denote any order, nor do they denote any order, for example, the first object may be one or more. In addition, "and/or" in the specification and the claims means at least one of connected objects, and a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described techniques can be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for purposes of example, and NR terminology is used in much of the description below, but the techniques may also be applied to applications other than NR system applications, such as generation 6 (6)thGeneration, 6G) communication system.
Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: bracelets, earphones, glasses and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, where the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a WLAN access Point, a WiFi node, a Transmit Receiving Point (TRP), or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only the Base Station in the NR system is taken as an example, but a specific type of the Base Station is not limited.
The following will introduce related terms or contexts to the present application;
acquisition of channel state information
As can be seen from Information theory, accurate Channel State Information (CSI) is crucial to Channel capacity. Especially for a multi-antenna system, the transmitting end can optimize the transmission of signals according to the CSI, so that the signals can be more matched with the state of the channel. Such as: a Channel Quality Indicator (CQI) may be used to select an appropriate Modulation and Coding Scheme (MCS) to implement link adaptation; precoding Matrix Indicator (PMI) can be used to implement eigenbeamforming (beamforming) to maximize the strength of a received signal, or to suppress interference (e.g., inter-cell interference, inter-user interference, etc.). Therefore, since the Multi-antenna technology (MIMO) has been proposed, CSI acquisition has been a research focus.
Generally, CSI acquisition is mainly divided into two ways: one is explicit feedback, such as feedback of CQI, PMI, etc.; the other is implicit feedback, such as using channel reciprocity. For large-scale antenna array system (massive MIMO), implicit feedback based on channel reciprocity is favored because the number of antennas is large and the resource overhead of explicit feedback is large.
A typical case of acquiring CSI by using channel reciprocity is that a terminal sends a Sounding Reference Signal (SRS) to a network, and then the network performs channel estimation according to the SRS, thereby acquiring information of an uplink channel. Then, according to the reciprocity of the channels, the network converts the information of the uplink channel into the information of the downlink channel and determines the precoding matrix of downlink data transmission according to the information.
Among them, channel reciprocity exists in a Time Division Duplex (TDD) system. For example, in the Angle domain, the Angle of Departure (AoD) of the downlink channel is equal to the Angle of Arrival (Angle of Arrival, AoA) of the uplink channel; in the time delay domain, the uplink and downlink channels have the same Channel Impulse Response (CIR).
However, in practical measurements, it is found that in a Frequency Division Duplex (FDD) system, there is a certain degree of reciprocity between uplink and downlink channels: in the angle domain, the AoD of the downlink channel is equal to the AoA of the uplink channel; in the Delay domain, the uplink and downlink channels have the same Power Delay Profile (PDP), that is, the uplink and downlink channels have the same multipath Delay and multipath Power. However, the phases of the respective paths are different. To distinguish from full channel reciprocity (full reciprocity) in a TDD system, this certain degree of reciprocity in an FDD system is called partial channel reciprocity (partial reciprocity).
Second, channel reciprocity
In a partial reciprocity system, a network performs channel estimation based on an SRS transmitted by a terminal to obtain an impulse response of an uplink channel. Thus, the time delay and amplitude of each path of the multi-path channel are obtained. In order to obtain the phase of each path, there are generally the following two methods.
Mode 1: the network directly indicates the time delay of each path of the terminal. For a terminal, Channel estimation is performed based on a CSI-RS (Channel State Information Reference Signal) to obtain an impulse response of a downlink Channel, and then, a phase of each path is obtained through IDFT transformation according to a time delay of each path configured by a network, and is reported to the network.
Mode 2: networkMultiple paths are mapped onto multiple CSI-RS ports. Frequency Selective Precoding (Frequency Selective Precoding) is performed on each CSI-RS port, and there are two basic implementation methods for Frequency Selective Precoding, one is Small Delay Cyclic Delay Diversity (SD-CDD), and the Delay corresponding to Frequency Selective Precoding is the Delay of the path corresponding to the Frequency Selective Precoding. The terminal side performs simple operation (such as addition) to obtain an impulse response component (a complex number) of the path corresponding to the CSI-RS port, and reports the impulse response component (including phase and amplitude) or the phase thereof to the network. Suppose one CSI-RS symbol (one QPSK symbol) can be represented as xkAnd k is its corresponding sub-carrier mapping position, the symbol after frequency selective precoding thereof can be represented as
Figure BDA0002729212830000061
Wherein,
Figure BDA0002729212830000062
is an imaginary unit; n is the number of Fast Fourier Transform (FFT) points corresponding to an Orthogonal Frequency Division Multiplexing (OFDM) symbol; τ is the time delay corresponding to the frequency selective precoding.
The other method is that the base station obtains combined precoding according to the space-frequency two-dimensional SVD, and maps a plurality of space-frequency basis vectors to a plurality of ports, and the difference from the first method is that the base station performs simple operation (such as addition) on the terminal side in the process of precoding, so as to obtain an impulse response component (a complex number) of a path corresponding to the CSI-RS port, and reports the impulse response component (including phase and amplitude) or the phase thereof to the network.
At present, under the condition that an uplink channel and a downlink channel have only partial reciprocity, most of schemes only utilize the reciprocity of an angle domain when a network side carries out precoding design for downlink transmission. In addition, in a few schemes using the reciprocity of the delay domain, timing skew at the terminal side is not considered. Timing deviation mainly comes from two aspects, one is transmission delay, and estimation of Timing Advance (Timing Advance) can only guarantee that the main path falls within the CP, but cannot guarantee to align to an accurate sampling point, such as: the 0 th. Secondly, when the UE receives the signal, it usually windows a few sampling points in advance, which depends on the specific implementation of the terminal and is unknown to the network side.
Therefore, both of the above methods are affected by the timing at the terminal side. With the first method, the delay of each path indicated by the network is not the delay of the path (such as the path with the maximum strength) expected by the terminal side. Similarly, with regard to the second method, when performing frequency selective precoding, the network may also cause the selected path to be a path that is not desired by the terminal (e.g., the path with the greatest strength). Obviously, the phase reported by the terminal side is not the phase expected by the network side, so that the estimation of the impulse response of the network side to the downlink channel is inaccurate, the calculation and derivation of the downlink precoding matrix are affected, and the throughput of downlink transmission is reduced.
The method for adjusting the reference signal provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
The present application provides a method for adjusting a reference signal, where the method is executed by a terminal, and fig. 2 is a first flowchart of a method for adjusting a reference signal according to an embodiment of the present application, and as shown in fig. 2, the method includes the steps of:
step S202, acquiring first information;
step S204, executing a first operation according to the first information; wherein the first operation comprises at least one of: adjusting a receiving time of the received first reference signal; performing time domain or frequency domain compensation on the calculation result of the first reference signal; it is determined whether to perform timing calibration.
Through the steps S202 and S204 in the embodiment of the present application, if the indication of the network to the reference signal and the measurement result of the terminal side to the reference signal do not match, the terminal may adjust the receiving time of the received first reference signal according to the first information, or perform time domain or frequency domain compensation on the calculation result of the first reference signal, so that the indication of the network to the reference signal and the measurement result of the terminal side to the reference signal match; the reference signal is adjusted after the timing calibration that has been performed before is used, or the current channel state changes, and the timing calibration needs to be performed again if the parameters of the timing calibration cannot be used any more before, and then the reference signal is adjusted. That is to say, through the manner in the embodiment of the present application, the reference signal may be adjusted so that the indication of the network for the reference signal matches the measurement result of the terminal for the reference signal, thereby solving the problem in the prior art that the throughput of downlink transmission is reduced due to the mismatch between the indication of the network for the reference signal and the measurement result of the terminal for the reference signal, and achieving the effect of improving the throughput of downlink transmission.
In an optional implementation manner of the embodiment of the present application, the first information in the embodiment of the present application is used to indicate a Quasi Co-located QCL (Quasi Co-Location) relationship, and the performing timing calibration includes:
step S11, under QCL relation, measuring the second reference signal, and selecting the first time delay path meeting the preset condition from the measurement result;
step S12, determining a deviation value between the position of the second delay path and the position of the first delay path; and the second time delay path meets the preset condition, and the position of the second time delay path is configured by the network side or agreed by a protocol.
It can be seen that the purpose of performing timing calibration in the embodiment of the present application is to obtain the offset value, but in some cases, the previously measured offset value may be multiplexed, that is, although the indication of the reference signal by the network and the measurement result of the reference signal by the terminal side do not match, the channel state is always stable, that is, the offsets within a period of time are all stable, and then the previous offset value may be used; that is, the timing calibration need not be performed in this case. Only when the indication of the network to the reference signal is not matched with the measurement result of the terminal side to the reference signal, and the channel state is always in a relatively fluctuating condition, a deviation value obtained by measurement needs to be obtained at this time, so that the reference signal is adjusted by the deviation value obtained by re-measurement.
In the embodiment of the present application, the operation of calculating the deviation value is performed periodically or triggered by the network side device. Wherein the period is determined by at least one of: and multiplexing the measurement period of the second reference signal according to the protocol convention and indicated by the network side equipment.
In other alternative embodiments of the present application, the operation of calculating the deviation value may also be non-periodic. If periodic, the period may be an independent period, specified by a protocol or indicated by the network side; alternatively, the period may be multiplexed with a period of a previous measurement reference signal, for example, a TRS is used as the QCL resource for measurement, and the timing offset measurement is performed every time the TRS measurement is performed when the enhancement of the target protocol is configured. If the Information is non-periodic, the Information can be triggered by signaling such as DCI (Downlink Control Information), MAC CE (MAC Control Element), or RRC (Radio Resource Control).
In an optional implementation manner of the embodiment of the present application, the first delay path or the second delay path that meets the preset condition includes at least one of the following: the time delay path with the maximum time domain amplitude, the time delay path with the maximum time domain amplitude acceleration, the time delay path appointed by a protocol and the time delay path indicated by network side equipment.
The time delay path with the largest time domain amplitude or the time delay path with the largest time domain amplitude acceleration is the time delay path with the largest time domain amplitude or the time delay path with the largest time domain amplitude acceleration in the measurement result after the reference signal is measured. The time delay path agreed by the protocol and the time delay path indicated by the network side device may also be the time delay path with the largest time domain amplitude, or the time delay path with the largest time domain amplitude acceleration, or other specific time delay paths.
It should be noted that, in the embodiment of the present application, the first Reference Signal may be a CSI-RS, and the second Reference Signal may be a CSI-RS or a TRS (Tracking Reference Signal)). Of course, the above is only an example of the first Reference Signal and the second Reference Signal in the present application, and the first Reference Signal and the second Reference Signal may also be other Reference signals, such as DMRS (Demodulation Reference Signal).
In addition, the reference signals (the first reference signal and the second reference signal) in the embodiment of the present application may be precoded or may not be precoded; the precoding method comprises the following steps: spatial precoding and/or frequency selective precoding. However, in the embodiment of the present application, if the reference signal is a CSI-RS, the CSI-RS used for normal CSI measurement may be multiplexed, so that resource utilization may be saved.
In the case that the first reference signal is CSI-RS and the second reference signal is TRS, the QCL relationship between the two can be implemented as follows: the method comprises the steps that a network side device is configured with a TRS in advance as QCL resource of a CSI-RS, and when CSI enhancement in a target protocol is configured, a terminal adjusts the reception of the CSI-RS according to the measurement result of the TRS; the method can also be used for the network side equipment to directly indicate one TRS as the QCL resource of the timing measurement of the CSI-RS. In an optional implementation manner of the embodiment of the present application, the network side device may indicate that one TRS corresponds to one or more CSI-RS ports, or the network side device may indicate one TRS resource or one or more ports thereof.
In the case where the first reference signal is a CSI-RS and the second reference signal is also a CSI-RS, the QCL relationship between the two may be implemented as follows: multiplexing the CSI-RS to indicate the QCL relationship; the network side equipment indicates one or more CSI-RS resources or one or more ports thereof, and the terminal carries out timing measurement in addition to normal CSI measurement according to the indicated content.
It should be noted that, the QCL relationship referred to in the embodiments of the present application is determined by at least one of the following means: protocol agreement and network side equipment indication.
In an optional implementation manner in the embodiment of the present application, regarding the manner of adjusting the receiving time of the reference signal in step S204, the method may further include:
step S21, determining a windowing position according to the deviation value;
in step S22, the first reference signal is measured at the windowed position.
The window position determined according to the deviation means a window position which needs to be advanced or delayed for measuring a first reference signal received next time in an actual application scene, if the position of the first delay path is advanced compared with the position of the second delay path, the position corresponding to the deviation value is delayed, and then the first reference signal is measured, and if the position of the first delay path is delayed compared with the position of the second delay path, the position corresponding to the deviation value is advanced, and then the first reference signal is measured.
In another optional implementation manner in the embodiment of the present application, the manner of performing time-domain or frequency-domain compensation on the calculation result of the first reference signal, which is referred to in step S204, further may include:
step S31, calculating a frequency domain compensation coefficient of the first reference signal according to the deviation value; performing phase compensation on a channel estimation result of the received first reference signal according to the compensation coefficient, or performing phase compensation on a calculation result of channel quality calculation after performing channel estimation on the received first reference signal according to the compensation coefficient;
and step S32, performing delay compensation on the received delay information of the first reference signal according to the deviation value.
For the above step S31 and step S32, in a specific application scenario, an SD-CDD matrix is calculated according to the offset value and the number N of subcarriers occupied by the first reference signal, where the time delay is the offset value; suppose one CSI-RS symbol (one QPSK symbol) can be represented as xkK is the mapping position of the corresponding sub-carrier, and the corresponding frequency domain compensation coefficient is
Figure BDA0002729212830000111
Wherein,
Figure BDA0002729212830000112
in units of imaginary numbers. If the result of the channel estimation is compensated, it is
Figure BDA0002729212830000113
If the result of the channel quality calculation is compensated, the calculation is firstly carried out according to xkCalculating a precoding coefficient vkThen multiplied by the compensation coefficient
Figure BDA0002729212830000114
In an optional implementation manner of the embodiment of the present application, after performing the timing calibration, the method of the embodiment of the present application may further include:
step S206, reporting the number of CSI Processing Units (CPUs) or the operating time of the CSI Processing units to the network side device.
The terminal reports the CPU information of the deviation value calculation, because the deviation value calculation may be performed simultaneously with normal CSI calculation or other behaviors of the reference signal, whether a new CPU or the same CPU is occupied or performed in series needs to be considered, and the terminal reports the number of CPUs required by the network side equipment or the time for which the CPUs need to continuously work to assist the base station to perform other operations.
The above is an explanation of the present application from the terminal side, and the following will receive an explanation of the present application in conjunction with the network side;
an embodiment of the present application provides a method for adjusting a reference signal, where the method is executed by a network side device, and fig. 3 is a flowchart of a second method for adjusting a reference signal according to an embodiment of the present application, and as shown in fig. 3, the method includes:
step S302, the first information and the reference signal are sent to the terminal.
Optionally, the method may further include step S304 of determining first information, where the first information is used to indicate a quasi co-located QCL relationship, where the first reference signal and the second reference signal satisfy the QCL relationship, and under the QCL relationship, measuring the second reference signal, and selecting a first delay path satisfying a preset condition from a measurement result;
based on this, the reference signals in the embodiments of the present application include at least one of: a first reference signal and a second reference signal; and the resources or ports of the second reference signal and the first reference signal meet the QCL relationship.
In the embodiment of the present application, the second reference signal may be configured by a network side device, and the number of the second reference signals is one or more; one second reference signal corresponds to one or more first reference signals.
In the embodiment of the present application, the first Reference Signal may be a CSI-RS, and the second Reference Signal may be a CSI-RS or a TRS (Tracking Reference Signal). Of course, the above is only an example of the first Reference Signal and the second Reference Signal in the present application, and the first Reference Signal and the second Reference Signal may also be other Reference signals, such as DMRS (Demodulation Reference Signal).
The method in the embodiment of the present application may further include:
step S306, receiving the number of Central Processing Units (CPUs) or the working time of the CPUs reported by the terminal, wherein the number of the CPUs or the working time of the CPUs is required for timing calibration.
That is, the first information and the reference signal sent by the network side device to the terminal are required when the terminal needs to perform timing calibration or needs to adjust the reference signal.
The present application is exemplified below with reference to alternative embodiments in the examples of the present application;
alternative embodiment 1:
in this optional embodiment, fig. 4 is a first schematic diagram of an amplitude of an impulse response of a downlink channel obtained by a terminal performing channel estimation according to a CSI-RS configured by a network in this embodiment of the present application, and with reference to fig. 4, a method for adjusting a reference signal in this embodiment of the present application includes:
step S401, the network side device configures the UE to measure on port0, and indicates the position of the strongest path of the UE as tau1And transmitting the CSI-RS; the CSI-RS may be precoded in the spatial domain, or may not be precoded in the spatial domain.
Optionally, the CSI-RS is subjected to frequency selective precoding, and a time delay corresponding to the frequency selective precoding is a time delay corresponding to the strongest path of the uplink channel impulse response; the uplink channel impulse response is obtained by the network according to the SRS measurement sent by the terminal; the SRS transmitted by the terminal may be precoded in the spatial domain, or may not be precoded in the spatial domain.
In step S402, the terminal performs channel estimation at port0, so as to obtain the impulse response of the downlink channel.
Step S403, the terminal searches the time delay of the path with the maximum intensity in the downlink impulse response to be tau2And calculating the sum time delay tau1Deviation value 2.
Step S404, when the UE receives the CSI-RS next time, the UE advances the corresponding deviation value (tau)1-τ2) One sampling point) to ensure that the strongest path falls on the time delay tau1The position of (a).
Alternative embodiment 2:
in this optional embodiment, fig. 5 is a schematic diagram of an amplitude of an impulse response of a downlink channel obtained by a terminal performing channel estimation according to a CSI-RS configured by a network in an embodiment of the present application, and with reference to fig. 5, a method for adjusting a reference signal in the embodiment of the present application includes:
step S501, the network configures the UE to measure on port0, and indicates the position of the strongest path of the UE as tau0And transmitting the CSI-RS, wherein the CSI-RS is precoded through a space domain;
step S502, the network side indicates the time delay position T to be reported by the UE0，τ1，τ2；
Step S503, the terminal performs channel estimation at port0 to obtain the impulse response of the downlink channel;
step S504, the terminal searches the time delay tau of the path with the maximum intensity in the downlink impulse response;
step S505, UE calculates time delay as tau, tau-tau0+τ1，τ-τ0+τ2And the amplitudes and phases corresponding to the three paths are quantized and reported to the network.
Optional embodiment 3:
in this alternative implementation, the method for adjusting the reference signal in the embodiment of the present application includes:
first, the network configures the UE to measure on port0, indicating the location of the strongest path of the UE as τ0And transmitting CSI-RS, wherein the CSI-RS is subjected to space-frequency joint precoding, and three space-frequency orthogonal bases are mapped on each port.
Step S601, the network side indicates the time delay position to be reported by the UE as tau0，τ1，τ2；
Step S602, the terminal performs channel estimation at port0 to obtain the impulse response of the downlink channel;
step S603, the terminal is at tau0Searching the time delay tau of the path with the maximum intensity in the downlink impulse response nearby;
step S604, UE calculates time delay deviation tau-tau0Selecting a precoding matrix from the corresponding frequency domain;
wherein, it is assumed that one CSI-RS symbol (one QPSK symbol) can be represented as xkAnd k is its corresponding sub-carrier mapping position, the symbol after offset-compensating frequency-selective precoding can be represented as
Figure BDA0002729212830000141
Wherein,
Figure BDA0002729212830000142
is an imaginary unit; n is the DFT point number (such as the CSI-RS number).
Step S605, the UE calculates PMI and reports the PMI by taking the result of each CSI-RS estimation result after deviation compensation frequency selective precoding as a final result at each port.
Optional embodiment 4:
in this optional embodiment, the network side device selects the port with the highest strength or the space-frequency orthogonal basis indicator to perform timing calibration for the terminal, and when the network side device finds that the channel quality changes and the measurement port and/or the strongest path position need to be changed, instructs the terminal to change the measurement port through signaling such as mac ce, RRC, or DCI.
The network side equipment estimates an uplink channel according to the SRS and calculates the precoding of the CSI-RS; the precoding may be space precoding or space-frequency precoding, and the network side selects the strongest port from all the ports to indicate to the terminal. For example, the network side device calculates the strength of the encoded frequency domain result corresponding to each CSI-RS port or each space-frequency precoding orthogonal basis according to the received uplink channel, and selects the port with the highest strength or the space-frequency orthogonal basis to indicate to the terminal, where the strength may be calculated according to a second moment or may be calculated according to a first moment.
For example, let the precoding of each CSI-RS of a certain port p on the network side be wk,l,pWherein k represents a subcarrier or a PRB, l represents a port, and the channel coefficient of a downlink channel obtained by the network side according to the previous CSI reporting result or the downlink channel estimated according to the SRS at each CSI-RS is hk,lThen the second moment of this port p is expressed as
Figure BDA0002729212830000151
The strength of this port p can also be expressed as a first moment
Figure BDA0002729212830000152
When the channel quality changes and the port with the maximum strength is no longer the previous port or the position of the strongest path changes, the network side calculates a new port or a space-frequency orthogonal base and/or the position of the strongest path, and indicates the terminal through signaling such as MACCE, RRC or DCI.
When the terminal reaches the period of timing measurement, recalculating the deviation value according to the new port and/or the strongest path position indicated by the network side equipment; or, the network side equipment triggers the terminal to recalculate the deviation value according to the port indicated latest and/or the strongest path position through signaling such as DCI/MACCE/RRC.
Optional embodiment 5:
in this optional embodiment, the network side device configures a TRS for the CSI-RS in advance as a QCL resource; under normal conditions, the terminal carries out timing according to the TRS, when relevant enhancement information in a target protocol is configured, the terminal calculates timing deviation at the same time of TRS timing, or carries out measurement according to triggering of network side equipment, and then adjusts and estimates the window opening time of the CSI-RS according to a measurement result.
The network side device may indicate one TRS as QCL resources for each CSI-RS port, where the QCL resources may be partially the same, and the UE measures a timing offset at a specified resource location, and adjusts a windowing location when receiving at different CSI-RS ports, or performs phase compensation on a received result.
Through the optional embodiments 1 to 5, the network side device may instruct the terminal to perform timing calibration on resources (ports or a part of ports) periodically or non-periodically (triggered by the network side), and then the terminal adjusts, according to the result of the timing calibration, CSI reporting delay indicated by the network, and reports, to the network, the number of CPUs or duration required for the timing calibration. The terminal carries out timing calibration through the information indicated by the network side equipment, can inhibit performance loss caused by timing deviation, improves CSI measurement precision, and meanwhile, the terminal reports the time required by timing deviation detection, and can help the network side equipment to carry out scheduling.
It should be noted that, in the method for adjusting a reference signal provided in the embodiment of the present application, the execution subject may be an adjusting apparatus for a reference signal, or a control module in the adjusting apparatus for a reference signal, which is used for executing the method for adjusting a reference signal. In the embodiments of the present application, a method for performing an adjustment on a reference signal by using an adjustment apparatus for a reference signal is taken as an example, and the adjustment apparatus for a reference signal provided in the embodiments of the present application is described.
An embodiment of the present application provides an apparatus for adjusting a reference signal, and fig. 6 is a schematic structural diagram of the apparatus for adjusting a reference signal in the embodiment of the present application, as shown in fig. 6, the apparatus includes:
an obtaining module 62, configured to obtain first information;
an execution module 64, configured to execute a first operation according to the first information;
wherein the first operation comprises at least one of: adjusting a receiving time of the received first reference signal; performing time domain or frequency domain compensation on the calculation result of the first reference signal; it is determined whether to perform timing calibration.
By the device in the embodiment of the application, if the indication of the network to the reference signal and the measurement result of the terminal side to the reference signal are not matched, the terminal can adjust the receiving time of the received first reference signal according to the first information, or perform time domain or frequency domain compensation on the calculation result of the first reference signal, so that the indication of the network to the reference signal and the measurement result of the terminal side to the reference signal are matched; the reference signal is adjusted after the timing calibration that has been performed before is used, or the current channel state changes, and the timing calibration needs to be performed again if the parameters of the timing calibration cannot be used any more before, and then the reference signal is adjusted. That is to say, through the manner in the embodiment of the present application, the reference signal may be adjusted so that the indication of the network for the reference signal matches the measurement result of the terminal for the reference signal, thereby solving the problem in the prior art that the throughput of downlink transmission is reduced due to the mismatch between the indication of the network for the reference signal and the measurement result of the terminal for the reference signal, and achieving the effect of improving the throughput of downlink transmission.
Optionally, the first information in this embodiment of the present application is used to indicate a quasi-co-located QCL relationship, where the first reference signal and the second reference signal satisfy the QCL relationship, and in a case that the first operation is to perform timing calibration, the performing module 64 further may include:
the processing unit is used for measuring the second reference signal under the QCL relationship and selecting a first time delay path meeting a preset condition from a measurement result;
a first determining unit configured to determine a deviation value between a position of the second delay path and a position of the first delay path; and the second delay path meets the preset condition, and the position of the second delay path is configured by the network side or agreed by a protocol.
Optionally, in a case that the first operation is to adjust the receiving time of the reference signal, the executing module 64 in this embodiment of the application further may include: the second determining unit is used for determining the windowing position according to the deviation value; and the measuring unit is used for measuring the first reference signal at the windowing position.
Optionally, in the case that the first operation is to perform time-domain or frequency-domain compensation on the calculation result of the first reference signal, the executing module 64 in this embodiment may further include: the first compensation unit is used for calculating a frequency domain compensation coefficient of the first reference signal according to the deviation value; performing phase compensation on a channel estimation result of the received first reference signal according to the compensation coefficient, or performing phase compensation on a calculation result of channel quality calculation after performing channel estimation on the received first reference signal according to the compensation coefficient; and the second compensation unit is used for carrying out time delay compensation on the received time delay information of the first reference signal according to the deviation value.
Optionally, the QCL relationship is determined by means of at least one of: protocol agreement and network side equipment indication.
Optionally, after performing the timing calibration, the apparatus in the embodiment of the present application may further include: and the reporting module is used for reporting the number of the CSI processing units required by the timing calibration or the working time of the CSI processing units to the network side equipment.
It should be noted that, in the embodiment of the present application, the operation of calculating the deviation value is performed periodically or triggered by the network side device. Wherein the period is determined by at least one of: and multiplexing the measurement period of the second reference signal according to the protocol convention and indicated by the network side equipment.
It should be noted that the first delay path or the second delay path meeting the preset condition includes at least one of the following: the time delay path with the maximum time domain amplitude, the time delay path with the maximum time domain amplitude acceleration, the time delay path appointed by a protocol and the time delay path indicated by network side equipment.
The above explains the present application from the terminal side, and the following explains the present application from the network side.
An embodiment of the present application provides an apparatus for adjusting a reference signal, and fig. 7 is a schematic structural diagram of the apparatus for adjusting a reference signal according to the embodiment of the present application, and as shown in fig. 7, the apparatus includes: a sending module 72, configured to send the first information and the reference signal to the terminal.
Optionally, the apparatus according to the embodiment of the present application may further include: a determining module for determining first information; the first information is used for indicating quasi co-located QCL relationship, and the first reference signal and the second reference signal meet the QCL relationship; the reference signal includes at least one of: a first reference signal and a second reference signal.
Optionally, the second reference signals in the embodiment of the present application are configured by a network side device, and the number of the second reference signals is one or more; one second reference signal corresponds to one or more first reference signals.
Optionally, the first reference signal in the embodiment of the present application is a channel state information reference signal CSI-RS; the second reference signal is a tracking reference signal TRS or a CSI-RS.
Optionally, resources or ports of the second reference signal and the first reference signal in the embodiment of the present application satisfy the QCL relationship.
In an optional implementation manner of the embodiment of the present application, the apparatus in the embodiment of the present application may further include: and the receiving module is used for receiving the number of the Central Processing Units (CPUs) or the working time of the CPUs reported by the terminal, wherein the number of the CPUs or the working time of the CPUs is required for timing calibration.
The adjusting device of the reference signal in the embodiment of the present application may be a device, and may also be a component, an integrated circuit, or a chip in the terminal. The device can be a mobile terminal or a non-mobile terminal. By way of example, the mobile terminal may include, but is not limited to, the above-listed type of terminal 11, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.
The adjusting device of the reference signal in the embodiment of the present application may be a device having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.
The device for adjusting a reference signal provided in the embodiment of the present application can implement each process implemented by the method embodiments of fig. 2 and fig. 3, and achieve the same technical effect, and is not described herein again to avoid repetition.
Optionally, as shown in fig. 8, an embodiment of the present application further provides a communication device 800, which includes a processor 801, a memory 802, and a program or an instruction stored on the memory 802 and executable on the processor 801, for example, when the communication device 800 is a terminal, the program or the instruction is executed by the processor 801 to implement each process of the above-mentioned reference signal adjusting method embodiment, and can achieve the same technical effect. When the communication device 800 is a network-side device, the program or the instructions are executed by the processor 801 to implement the processes of the above-mentioned reference signal adjusting method embodiment, and the same technical effect can be achieved, and for avoiding repetition, the details are not described here again.
Fig. 9 is a schematic diagram of a hardware structure of a terminal for implementing the embodiment of the present application.
The terminal 900 includes but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, and a processor 910.
Those skilled in the art will appreciate that the terminal 900 may further include a power source (e.g., a battery) for supplying power to various components, and the power source may be logically connected to the processor 910 through a power management system, so as to manage charging, discharging, and power consumption management functions through the power management system. The terminal structure shown in fig. 9 does not constitute a limitation of the terminal, and the terminal may include more or less components than those in fig. 9, or combine some components, or have a different arrangement of components, and thus, will not be described again.
It should be understood that, in the embodiment of the present application, the input Unit 904 may include a Graphics Processing Unit (GPU) 9041 and a microphone 9042, and the Graphics Processing Unit 9041 processes image data of a still picture or a video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 907 includes a touch panel 9071 and other input devices 9072. A touch panel 9071 also referred to as a touch screen. The touch panel 9071 may include two parts, a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.
In this embodiment of the application, the radio frequency unit 901 receives downlink data from a network side device and then processes the downlink data to the processor 910; in addition, the uplink data is sent to the network side equipment. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
Memory 909 can be used to store software programs or instructions as well as various data. The memory 909 may mainly include a storage program or instruction area and a storage data area, wherein the storage program or instruction area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. In addition, the Memory 909 may include a high-speed random access Memory, and may also include a nonvolatile Memory, wherein the nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable PROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.
Processor 910 may include one or more processing units; alternatively, the processor 910 may integrate an application processor, which mainly handles operating systems, user interfaces, and applications or instructions, etc., and a modem processor, which mainly handles wireless communications, such as a baseband processor. It is to be appreciated that the modem processor described above may not be integrated into processor 910.
The radio frequency unit 901 is configured to obtain first information;
a processor 910 configured to perform a first operation according to first information, wherein the first operation includes at least one of:
adjusting a receiving time of the received first reference signal;
performing time domain or frequency domain compensation on the calculation result of the first reference signal;
it is determined whether to perform timing calibration.
By the method and the device, if the indication of the network to the reference signal is not matched with the measurement result of the terminal side to the reference signal, the terminal can adjust the receiving time of the received first reference signal according to the first information, or perform time domain or frequency domain compensation on the calculation result of the first reference signal, so that the indication of the network to the reference signal is matched with the measurement result of the terminal side to the reference signal; the reference signal is adjusted after the timing calibration that has been performed before is used, or the current channel state changes, and the timing calibration needs to be performed again if the parameters of the timing calibration cannot be used any more before, and then the reference signal is adjusted. That is to say, through the manner in the embodiment of the present application, the reference signal may be adjusted so that the indication of the network for the reference signal matches the measurement result of the terminal for the reference signal, thereby solving the problem in the prior art that the throughput of downlink transmission is reduced due to the mismatch between the indication of the network for the reference signal and the measurement result of the terminal for the reference signal, and achieving the effect of improving the throughput of downlink transmission.
Specifically, the embodiment of the application further provides a network side device. As shown in fig. 10, the network device 1000 includes: antenna 101, radio frequency device 102, baseband device 103. Antenna 101 is connected to radio frequency device 102. In the uplink direction, rf device 102 receives information via antenna 101 and sends the received information to baseband device 103 for processing. In the downlink direction, the baseband device 103 processes information to be transmitted and transmits the information to the rf device 102, and the rf device 102 processes the received information and transmits the processed information through the antenna 101.
The above-mentioned band processing apparatus may be located in the baseband apparatus 103, and the method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 103, where the baseband apparatus 103 includes the processor 104 and the memory 105.
The baseband apparatus 103 may include, for example, at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 10, where one of the chips, for example, the processor 104, is connected to the memory 105 to call up a program in the memory 105 to perform the network device operations shown in the above method embodiments.
The baseband device 103 may further include a network interface 106, such as a Common Public Radio Interface (CPRI), for exchanging information with the radio frequency device 102.
Specifically, the network side device of the embodiment of the present invention further includes: the instructions or programs stored in the memory 105 and capable of being executed on the processor 104, and the processor 104 invokes the instructions or programs in the memory 105 to execute the method executed by each module shown in fig. 10, and achieve the same technical effect, and are not described herein for avoiding repetition.
The embodiments of the present application further provide a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above-mentioned embodiment of the method for adjusting a reference signal, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.
The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a network-side device program or an instruction, to implement each process of the above-mentioned reference signal adjustment embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (33)

1. A method for adjusting a reference signal, performed by a terminal, includes:
acquiring first information;
performing a first operation according to the first information, wherein the first operation comprises at least one of:
adjusting a receiving time of the received first reference signal;
performing time domain or frequency domain compensation on the calculation result of the first reference signal;
it is determined whether to perform timing calibration.
2. The method of claim 1, wherein the first information is indicative of a quasi co-located QCL relationship, wherein the first and second reference signals satisfy the QCL relationship, and wherein performing timing calibration comprises:
under the QCL relationship, measuring the second reference signal, and selecting a first time delay path meeting a preset condition from a measurement result;
determining a deviation value between the position of a second time delay path and the position of the first time delay path;
and the second time delay path meets the preset condition, and the position of the second time delay path is configured by a network side or agreed by a protocol.
3. The method of claim 2, wherein the adjusting the time of reception of the reference signal comprises:
determining a windowing position according to the deviation value;
the first reference signal is measured at the windowed location.
4. The method of claim 2, wherein the compensating the calculation result of the first reference signal in time domain or frequency domain comprises:
calculating a frequency domain compensation coefficient of the first reference signal according to the deviation value; performing phase compensation on a channel estimation result of the received first reference signal according to the compensation coefficient, or performing phase compensation on a calculation result of channel quality calculation after performing channel estimation on the received first reference signal according to the compensation coefficient;
and performing time delay compensation on the received time delay information of the first reference signal according to the deviation value.
5. The method of claim 2, wherein said QCL relationship is determined by at least one of: protocol agreement and network side equipment indication.
6. The method according to any of claims 2 to 4, wherein after performing timing calibration, the method further comprises:
and reporting the number of the CSI processing units required by timing calibration or the working time of the CSI processing units to network side equipment.
7. The method of claim 2, wherein the operation of calculating the deviation value is performed periodically or triggered by a network side device.
8. The method of claim 7,
the period is determined by means of at least one of: and multiplexing the measurement period of the second reference signal according to the protocol and indicated by the network side equipment.
9. The method of claim 2, wherein the first or second delay paths satisfying the preset condition comprise at least one of:
the time delay path with the maximum time domain amplitude, the time delay path with the maximum time domain amplitude acceleration, the time delay path appointed by a protocol and the time delay path indicated by network side equipment.
10. A method for adjusting a reference signal, performed by a network side device, includes:
and transmitting the first information and the reference signal to the terminal.
11. The method of claim 10,
the first information is used for indicating a quasi co-located QCL relationship, and a first reference signal and a second reference signal satisfy the QCL relationship;
the reference signal includes at least one of: the first reference signal and the second reference signal.
12. The method according to claim 11, wherein the second reference signal is configured by the network side device and is one or more in number; one said second reference signal corresponds to one or more said first reference signals.
13. The method of claim 11, wherein the first reference signal is a channel state information reference signal (CSI-RS); the second reference signal is a tracking reference signal TRS or a CSI-RS.
14. The method of claim 11, wherein resources or ports of the second reference signal and the first reference signal satisfy the QCL relationship.
15. The method of claim 10, further comprising:
and receiving the number of the CSI processing units or the working time of the CSI processing units reported by the terminal, wherein the number of the CSI processing units or the working time of the CSI processing units is required for timing calibration.
16. An apparatus for adjusting a reference signal, comprising:
the acquisition module is used for acquiring first information;
an execution module, configured to execute a first operation according to the first information, where the first operation includes at least one of:
adjusting a receiving time of the received first reference signal;
performing time domain or frequency domain compensation on the calculation result of the first reference signal;
it is determined whether to perform timing calibration.
17. The apparatus of claim 16, wherein the first information indicates a quasi co-located QCL relationship, wherein the first and second reference signals satisfy the QCL relationship, and wherein the performing module, in the event that the first operation is performing timing calibration, comprises:
the processing unit is used for measuring the second reference signal under the QCL relationship and selecting a first time delay path meeting a preset condition from a measurement result;
a first determining unit, configured to determine an offset value between a position of a second delay path and a position of the first delay path;
and the second time delay path meets the preset condition, and the position of the second time delay path is configured by a network side or agreed by a protocol.
18. The apparatus of claim 17, wherein in a case that the first operation is adjusting a reception time of the reference signal, the performing module comprises:
the second determining unit is used for determining a windowing position according to the deviation value;
a measurement unit configured to measure the first reference signal at the windowing position.
19. The apparatus of claim 17, wherein in the case that the first operation is time-domain or frequency-domain compensation of the calculation result of the first reference signal, the performing module comprises:
the first compensation unit is used for calculating a frequency domain compensation coefficient of the first reference signal according to the deviation value; performing phase compensation on a channel estimation result of the received first reference signal according to the compensation coefficient, or performing phase compensation on a calculation result of channel quality calculation after performing channel estimation on the received first reference signal according to the compensation coefficient;
and the second compensation unit is used for carrying out time delay compensation on the received time delay information of the first reference signal according to the deviation value.
20. The apparatus of claim 17, wherein said QCL relationship is determined by at least one of: protocol agreement and network side equipment indication.
21. The apparatus according to any of claims 17 to 19, wherein after performing timing calibration, the apparatus further comprises:
and the reporting module is used for reporting the number of the CSI processing units required by the timing calibration or the working time of the CSI processing units to network side equipment.
22. The apparatus of claim 17, wherein the operation of calculating the deviation value is performed periodically or triggered by a network side device.
23. The apparatus of claim 22,
the period is determined by means of at least one of: and multiplexing the measurement period of the second reference signal according to the protocol and indicated by the network side equipment.
24. The apparatus of claim 17, wherein the first latency or the second latency meeting a preset condition comprises at least one of:
the time delay path with the maximum time domain amplitude, the time delay path with the maximum time domain amplitude acceleration, the time delay path appointed by a protocol and the time delay path indicated by network side equipment.
25. An apparatus for adjusting a reference signal, comprising:
and the sending module is used for sending the first information and the reference signal to the terminal.
26. The apparatus of claim 25,
the first information is used for indicating a quasi co-located QCL relationship, and a first reference signal and a second reference signal satisfy the QCL relationship;
the reference signal includes at least one of: the first reference signal and the second reference signal.
27. The apparatus according to claim 26, wherein the second reference signal is configured by a network side device, and the number of the second reference signals is one or more; one said second reference signal corresponds to one or more said first reference signals.
28. The apparatus of claim 26, wherein the first reference signal is a channel state information reference signal (CSI-RS); the second reference signal is a tracking reference signal TRS or a CSI-RS.
29. The apparatus of claim 26, wherein resources or ports of the second reference signal and the first reference signal satisfy the QCL relationship.
30. The apparatus of claim 25, further comprising:
and the receiving module is used for receiving the number of the CSI processing units or the working time of the CSI processing units reported by the terminal, wherein the number of the CSI processing units or the working time of the CSI processing units is required for timing calibration.
31. A terminal comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method of adjusting a reference signal according to any one of claims 1 to 9.
32. A network-side device, comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method for adjusting a reference signal according to any one of claims 10 to 15.
33. A readable storage medium, characterized in that the readable storage medium stores thereon a program or instructions which, when executed by the processor, implement the method of adjusting a reference signal according to any one of claims 1 to 9, or the steps of the method of adjusting a reference signal according to any one of claims 10 to 15.
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