TWI758112B - Frequency compensation method, device, network side device, terminal and storage medium - Google Patents

Abstract

Embodiments of the present invention provide a frequency compensation method, device, network-side device, terminal, and storage medium. The method includes: using one or more first transmission and reception points to receive a first uplink signal sent by the terminal for frequency compensation; using The first uplink signal determines the corresponding frequency compensation value of the at least one first transmission and reception point; according to the frequency compensation value corresponding to the at least one first transmission and reception point, it is determined that the at least one first transmission and reception point is used for the transmission of the downlink transmission. frequency. Therefore, the embodiment of the present invention realizes frequency compensation for at least one first transmission and reception point during downlink transmission, effectively eliminates Doppler spread on the terminal side, and also improves the performance of downlink transmission.

Description

Frequency compensation method, device, network side device, terminal and storage medium

Cross-references to related applications

The present invention claims the priority of the Chinese patent application with the application number 2020101475821 filed on March 5, 2020 and the invention title is "frequency compensation method, device, network side equipment, terminal and storage medium", which is incorporated by reference in its entirety. into this article.

technical field

The present invention relates to the field of communication technologies, and in particular, to a frequency compensation method, an apparatus, a network side device, a terminal and a storage medium.

Multi-point cooperation is an important technical means in wireless communication system. Distributed transmission through a plurality of distributed transmission points can improve the coverage of the cell edge and reduce the time delay and signaling overhead caused by handover.

At present, in the high-speed rail scenario, in order to avoid frequent cell handover by terminals, the deployment method of SFN (Single Frequency Network, single frequency network) is usually adopted, which is referred to as HST-SFN (High Speed Train - Single Frequency Network, high-speed rail single frequency network). )Scenes. Among them, a typical transmission scheme in the HST-SFN scenario is to send downlink signals simultaneously from all RRHs (Remote Radio Heads) connected to a BBU (Base Band Unit, baseband processing unit). However, the Doppler frequency shift generated by the signals from multiple RRHs forms the Doppler spread, and because the train moves very fast, the Doppler frequency shift may vary widely, so that the terminal cannot Good demodulation of the downlink signal.

Aiming at the problem that in the HST-SFN scenario, the Doppler frequency shift generated by the signals from a plurality of RRHs causes the terminal to be unable to demodulate the downlink signal well, the embodiments of the present invention provide a frequency compensation method, device, network Roadside equipment and terminals are used to implement frequency compensation for the transmission frequency of downlink transmission.

An embodiment of the present invention provides a frequency compensation method, and the frequency compensation method is used for network-side equipment, including:

Utilize one or more first transmission and reception points TRP to receive the first uplink signal sent by the terminal for frequency compensation;

Determine the corresponding frequency compensation value of at least one first TRP by using the first uplink signal;

According to the respective frequency compensation values of the at least one first TRP, the respective transmission frequencies of the at least one first TRP used for downlink transmission are determined.

Preferably, the determining the corresponding frequency compensation value of at least one first TRP by using the first uplink signal includes:

The frequency compensation value corresponding to each first TRP is determined by using the first uplink signal.

Preferably, the determining the corresponding frequency compensation value of at least one first TRP by using the first uplink signal includes:

Using the first uplink signal to perform frequency offset estimation to obtain a frequency offset estimation result;

Determine the reference point for frequency compensation;

According to the frequency offset estimation result and the reference point, each corresponding frequency compensation value of at least one first TRP is determined.

Preferably, the frequency offset estimation is performed using the first uplink signal to obtain a frequency offset estimation result, including:

The at least one first TRP performs frequency offset estimation on the first uplink signal, respectively, to obtain respective corresponding frequency offset estimation values.

Preferably, the determining a reference point for frequency compensation includes:

The reference point is determined according to the set rule or the reference point indication information sent by the terminal.

Preferably, the setting rule includes any of the following:

The reference point is the frequency offset estimation value corresponding to the designated first TRP determined by the network side device;

The reference point is the estimated frequency offset with the largest absolute value among the estimated frequency offsets corresponding to each first TRP determined by the network side device;

The reference point is the estimated frequency offset with the smallest absolute value among the estimated frequency offsets corresponding to each first TRP determined by the network side device;

The reference point is the maximum value among the absolute values of the frequency offset estimation values corresponding to each first TRP determined by the network side device;

The reference point is the minimum value among the absolute values of the frequency offset estimation values corresponding to each first TRP determined by the network side device.

Preferably, the reference point indication information includes any of the following:

The reference point indication information is indication information about the designated first TRP; wherein, the frequency offset estimation value corresponding to the designated first TRP is the reference point;

The reference point indication information is indication information about the downlink signal; wherein, the estimated frequency offset corresponding to the first TRP associated with the indication information of the downlink signal is the reference point;

The reference point indication information is indication information about the first uplink signal; wherein, the network-side device uses the estimated frequency offset estimated value of the first uplink signal indicated by the indication information as the reference point.

Preferably, the determining a reference point for frequency compensation includes:

The at least one first TRP determines the reference point according to the frequency offset estimation result; or

The central processing unit connected to the first TRP included in the network-side device determines the reference point according to the frequency offset estimation result.

Preferably, the at least one first TRP determines the reference point according to the frequency offset estimation result, including:

At least one first TRP performs information exchange on its corresponding frequency offset estimation value, and determines its own corresponding reference point for determining frequency compensation according to the information exchanged.

Preferably, the frequency compensation value corresponding to the at least one first TRP is determined according to the frequency offset estimation result and the reference point, including:

The at least one first TRP determines a corresponding frequency compensation value according to the frequency offset estimation result and the reference point; or

The central processing unit connected to the first TRP included in the network side device determines the frequency compensation value corresponding to at least one first TRP according to the frequency offset estimation result and the reference point.

Preferably, the at least one first TRP determines the corresponding frequency compensation value according to the frequency offset estimation result and the reference point, including:

The at least one first TRP determines a frequency compensation value corresponding to itself according to the estimated frequency offset value corresponding to itself and the reference point.

Preferably, the frequency compensation value corresponding to the at least one first TRP is determined according to the frequency offset estimation result and the reference point, including:

The second TRP determines the frequency compensation value corresponding to itself according to the frequency offset estimated value corresponding to itself, and sends the determined frequency compensation value or the frequency offset estimated value corresponding to the second TRP to the third TRP; wherein the second TRP Used to characterize a part of TRPs in the first TRP, and the third TRP is used to characterize another part of TRPs in the first TRP.

Preferably, determining the respective transmission frequencies of the at least one first TRP for downlink transmission according to the corresponding frequency compensation values of the at least one first TRP, including:

The second TRP determines its own transmission frequency for downlink transmission according to the frequency compensation value determined by itself;

The third TRP determines its own transmission frequency for downlink transmission according to the frequency compensation value determined by the second TRP or the frequency offset estimation value corresponding to the second TRP.

Preferably, the determining the corresponding frequency compensation value of at least one first TRP by using the first uplink signal includes:

The at least one first TRP uses the first uplink signal to determine a corresponding frequency compensation value; or

The central processing unit connected to the first TRP included in the network-side device uses the first uplink signal to determine the corresponding frequency compensation value of the at least one first TRP.

Preferably, the at least one first TRP uses the first uplink signal to determine the corresponding frequency compensation value, including:

The at least one first TRP respectively performs frequency offset estimation on the first uplink signal to obtain respective corresponding frequency offset estimation values;

The at least one first TRP determines a corresponding frequency compensation value according to the corresponding frequency offset estimation value.

Preferably, the first uplink signal includes a second uplink signal corresponding to each first TRP for performing frequency offset estimation;

The at least one first TRP performs frequency offset estimation on the first uplink signal, respectively, to obtain respective corresponding frequency offset estimation values, including:

The at least one first TRP performs frequency offset estimation on the respective corresponding second uplink signals to obtain respective corresponding frequency offset estimation values.

Preferably, it also includes:

The association relationship between the at least one first TRP and the second uplink signal is sent to the terminal.

Preferably, it also includes: the association relationship is indicated by any one of the following messages:

spatial relationship information of the second uplink signal;

The transmission configuration of the second uplink signal indicates the TCI state;

Quasi-Co-Location (Quasi-Co-Location) indication information of the second uplink signal.

An embodiment of the present invention provides a frequency compensation method, and the frequency compensation method is used in a terminal, including:

Generate a first uplink signal for frequency compensation according to the configuration or instruction of the network-side device;

Send the first uplink signal to the network side device, so that the network side device uses one or more first transmission and reception points TRP to receive the first uplink signal sent by the terminal, and uses the first uplink signal to determine at least one first TRP The respective corresponding frequency compensation values, according to the respective corresponding frequency compensation values of the at least one first TRP, determine the respective transmission frequencies of the at least one first TRP used for downlink transmission.

Preferably, the first uplink signals used by at least one first TRP for frequency offset estimation are the same.

Preferably, the first uplink signal includes a second uplink signal corresponding to each first TRP for performing frequency offset estimation.

Preferably, it also includes:

The association relationship between the at least one first TRP and the second uplink signal is received.

Preferably, it also includes: the association relationship is indicated by any one of the following messages:

spatial relationship information of the second uplink signal;

The transmission configuration of the second uplink signal indicates the TCI state;

The second uplink signal is quasi-co-located QCL indicating information.

Preferably, the association relationship indicates the downlink signal associated with the first uplink signal; the frequency compensation method further includes:

receiving a downlink signal associated with the second uplink signal;

Sending the first uplink signal to the network-side device includes:

Based on the reception of the downlink signal, the first uplink signal is sent to the network side device.

An embodiment of the present invention provides a frequency compensation device, the frequency compensation device is used for network side equipment, including:

a receiving module for receiving the first uplink signal for frequency compensation sent by the terminal using one or more first transmission receiving points TRP;

a frequency compensation determination module, used for determining the corresponding frequency compensation value of at least one first TRP by using the first uplink signal;

The transmission frequency determination module is configured to determine the respective transmission frequencies of the at least one first TRP used for downlink transmission according to the corresponding frequency compensation values of the at least one first TRP.

An embodiment of the present invention provides a frequency compensation device, wherein the frequency compensation device is used in a terminal, and includes:

A generation module, used for generating the first uplink signal for frequency compensation according to the configuration or instruction of the network side device;

The sending module is used for sending the first uplink signal to the network side equipment, so that the network side equipment uses one or more first transmission and reception points TRP to receive the first uplink signal sent by the terminal, and use the first uplink signal The frequency compensation value corresponding to the at least one first TRP is determined, and the transmission frequency used for the downlink transmission of the at least one first TRP is determined according to the frequency compensation value corresponding to the at least one first TRP.

An embodiment of the present invention provides a network-side device, including a memory, a processor, and a program stored in the memory and running on the processor. The network-side device includes a plurality of remote radio heads TRP, and the processor executes The program implements the following steps:

Utilize one or more first transmission and reception points TRP to receive the first uplink signal sent by the terminal for frequency compensation;

Determine the corresponding frequency compensation value of at least one first TRP by using the first uplink signal;

According to the respective frequency compensation values of the at least one first TRP, the respective transmission frequencies of the at least one first TRP used for downlink transmission are determined.

Preferably, the determining the corresponding frequency compensation value of at least one first TRP by using the first uplink signal includes:

Using the first uplink signal to perform frequency offset estimation to obtain a frequency offset estimation result;

Determine the reference point for frequency compensation;

According to the frequency offset estimation result and the reference point, each corresponding frequency compensation value of the at least one first TRP is determined.

Preferably, the frequency offset estimation is performed using the first uplink signal to obtain a frequency offset estimation result, including:

The at least one first TRP performs frequency offset estimation on the first uplink signal, respectively, to obtain respective corresponding frequency offset estimation values.

Preferably, the first uplink signal includes a second uplink signal corresponding to each first TRP for performing frequency offset estimation;

The at least one first TRP performs frequency offset estimation on the first uplink signal, respectively, to obtain respective corresponding frequency offset estimation values, including:

The at least one first TRP performs frequency offset estimation on the respective corresponding second uplink signals to obtain respective corresponding frequency offset estimation values.

Preferably, it also includes:

The association relationship between the at least one first TRP and the second uplink signal is sent to the terminal.

Preferably, the association is indicated by any of the following messages:

spatial relationship information of the second uplink signal;

The transmission configuration of the second uplink signal indicates the TCI state;

The second uplink signal is quasi-co-located QCL indicating information.

An embodiment of the present invention provides a terminal, including a memory, a processor, and a program stored in the memory and running on the processor. The processor implements the following steps when executing the program:

Generate a first uplink signal for frequency compensation according to the configuration or instruction of the network-side device;

Send the first uplink signal to the network side device, so that the network side device uses one or more first transmission and reception points TRP to receive the first uplink signal sent by the terminal, and uses the first uplink signal to determine at least one first TRP The respective corresponding frequency compensation values, according to the respective corresponding frequency compensation values of the at least one first TRP, determine the respective transmission frequencies of the at least one first TRP used for downlink transmission.

Preferably, the first uplink signal includes a second uplink signal corresponding to each first TRP for performing frequency offset estimation.

Preferably, it also includes:

The association relationship between the at least one first TRP and the second uplink signal is received.

Preferably, the association is indicated by any of the following messages:

spatial relationship information of the second uplink signal;

The transmission configuration of the second uplink signal indicates the TCI state;

The second uplink signal is quasi-co-located QCL indicating information.

Preferably, the association relationship indicates the downlink signal associated with the first uplink signal; the frequency compensation method further includes:

receiving a downlink signal associated with the second uplink signal;

Sending the first uplink signal to the network-side device includes:

Based on the reception of the downlink signal, the first uplink signal is sent to the network side device.

Embodiments of the present invention provide a non-transitory computer-readable storage medium on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the steps of a frequency compensation method for a network-side device are implemented.

An embodiment of the present invention provides a non-transitory computer-readable storage medium on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the steps of a frequency compensation method for a terminal are implemented.

The frequency compensation method, device, network-side device, terminal, and storage medium provided by the embodiments of the present invention use one or more first TRPs to receive the first uplink signal sent by the terminal for frequency compensation, and use the first uplink signal to determine The frequency compensation value corresponding to the at least one first TRP, according to the frequency compensation value corresponding to the at least one first TRP, the transmission frequency used for the downlink transmission of the at least one first TRP is determined, so that the at least one first TRP is performing downlink transmission. During transmission, the frequency-compensated transmission frequency can be used for downlink transmission, thereby realizing frequency compensation for at least one first TRP during downlink transmission, effectively eliminating Doppler spread on the terminal side, and improving downlink transmission. performance.

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those with ordinary knowledge in the art without creative work shall fall within the protection scope of the present invention.

In order to clearly describe the technical solutions of the embodiments of the present invention, in each embodiment of the present invention, if words such as "first" and "second" are used to distinguish the same or similar items with basically the same function and effect, Those with ordinary knowledge in the art can understand that words such as "first" and "second" do not limit the quantity and execution order.

Multi-point cooperation is an important technical means in wireless communication system. Distributed transmission through a plurality of distributed transmission points can improve the coverage of the cell edge and reduce the time delay and signaling overhead caused by handover.

Currently, in a high-speed rail scenario, in order to avoid frequent cell handovers by terminals, an SFN deployment method is usually adopted, which is referred to as an HST-SFN scenario for short. Among them, in the HST-SFN scenario, a typical transmission scheme is to simultaneously send downlink signals from all RRHs connected to a BBU. However, signals from multiple RRHs may experience different Doppler shifts (e.g. positive Doppler shifts from one or some RRHs, positive Doppler shifts from one or some RRHs, and positive Doppler shifts from another or some RRHs). The Doppler shift of the RRH is the negative Doppler shift), resulting in a Doppler spread containing positive and negative Doppler shifts. In addition, due to the fast moving speed of the train, the variation range of the Doppler frequency shift may be very large, which will cause the terminal to not be able to demodulate the downlink signal well.

In view of the above problems, embodiments of the present invention provide a frequency compensation method, device, network-side device, and terminal, which are used to eliminate Doppler spread experienced by downlink signals.

The frequency compensation method, device, network-side device, terminal, and storage medium provided by the embodiments of the present invention can be applied to a wireless communication system or a system combining wireless and wired. Including but not limited to 5G systems (such as NR systems), 6G systems, satellite systems, Internet of Vehicles systems, evolved Long Term Evolution (Long Term Evolution, LTE) systems, and subsequent evolution communication systems of the above systems.

The network side equipment provided in the embodiments of the present invention may include, but is not limited to, one or more of the following: a commonly used base station, an evolved node base station (evolved node base station, eNB), and network side equipment in a 5G system (for example, a next-generation base station) (next generation node base station, gNB), transmission and reception point (transmission and reception point, TRP)) and other equipment.

The terminals provided in the embodiments of the present invention may be referred to as user equipment or the like. Terminals include but are not limited to handheld devices and vehicle-mounted devices. For example, it may be a mobile phone, a tablet computer, a notebook computer, an Ultra-Mobile Personal Computer (UMPC), a netbook, or a Personal Digital Assistant (PDA).

The following description will be given through specific embodiments.

FIG. 1 is a flowchart of a frequency compensation method provided by an embodiment of the present invention. The frequency compensation method can be applied to a network side device. For example, the network side device may include a central processing unit and a TRP (Transmission Reception Point), etc. , the configuration or instruction of the network-side device may be performed by the central processing unit or by the TRP; as shown in FIG. 1 , the method includes the following steps:

Step 110: Use one or more first TRPs to receive the first uplink signal sent by the terminal for frequency compensation.

Specifically, a plurality of first TRPs are grouped (divided into one or more TRP groups), and one or more TRP groups use a part of the first TRPs in the group to perform the first uplink signal sent by the terminal for frequency compensation reception. For example, each first TRP group uses one first TRP to receive the first uplink signal.

Each first TRP receives the first uplink signal sent by the terminal for frequency compensation.

The first uplink signal may be an SRS (Sounding Reference Signal, information channel sounding reference signal), a random access signal, and other reference signals that can be used for frequency compensation. The random access signal can be sent through PRACH (Physical Random Access Channel, Physical Random Access Information Channel).

In addition, the TRP in the embodiment of the present invention may be an antenna unit group, an RRH, and the like of a network-side device.

Step 120: Determine the corresponding frequency compensation value of at least one first TRP by using the first uplink signal.

Specifically, at least one TRP in the one or more first TRPs determines its corresponding frequency compensation value.

It should be noted that when the first uplink signal is used to determine the corresponding frequency compensation value of at least one first TRP, the first uplink signal can be used to determine the corresponding frequency compensation value of each first TRP, that is, each first TRP uses The first uplink signal determines its corresponding frequency compensation value. That is to say, the number of the first TRPs for determining the frequency compensation value is not specifically limited here.

When each first TRP is divided into one or more TRP groups, when using the first uplink signal to determine the frequency compensation value corresponding to each first TRP, it may include determining the frequency compensation value for each TRP group, and further determining The corresponding frequency compensation value of each first TRP is obtained.

For all the first TRPs in each TRP group, the corresponding frequency compensation values may be the same, which are the frequency compensation values corresponding to the TRP group. For example, when any TRP group uses a first TRP in the group to receive the first uplink signal, the first uplink signal can be used to determine the frequency compensation value corresponding to the TRP group, and the frequency compensation value can be determined by using the first uplink signal. The value is used as the frequency compensation value corresponding to each first TRP in the TRP group. In this way, the frequency compensation values corresponding to the plurality of TRP groups are determined, and then the frequency compensation values corresponding to each of the first TRPs can be further determined.

In addition, when the first uplink signal is used to determine the frequency compensation value corresponding to each first TRP, the frequency compensation value corresponding to each first TRP may be determined according to the Doppler spectrum of the first uplink signal, or the frequency compensation value corresponding to each first TRP may be determined according to the Doppler spectrum of the first uplink signal. The frequency offset estimation value of the signal (for example, the Doppler frequency shift estimation value) determines the frequency compensation value corresponding to each first TRP and so on.

Step 130: Determine the respective transmission frequencies of the at least one first TRP used for downlink transmission according to the corresponding frequency compensation values of the at least one first TRP.

Specifically, when the first TRP performs downlink transmission, the transmission frequency after frequency compensation can be used, so that the downlink Doppler frequency shift received by the terminal from the first TRP can be controlled within a small difference range (that is, the Doppler spread is eliminated), thereby reducing the error of the information channel estimation and improving the performance of downlink transmission.

It can be seen from the above-mentioned embodiments that by using one or a plurality of first TRPs to receive the first uplink signal sent by the terminal for frequency compensation, and using the first uplink signal to determine the frequency compensation value corresponding to at least one first TRP, according to the at least one The frequency compensation value corresponding to each of the first TRPs determines the transmission frequency of at least one first TRP used for downlink transmission. In this way, when the first TRP performs downlink transmission, the frequency-compensated transmission frequency can be used for downlink transmission, thereby realizing In order to perform frequency compensation for the first TRP during downlink transmission, the Doppler spread on the terminal side is effectively eliminated, and the performance of downlink transmission is also improved.

Further, on the basis of the above method, the use of the first uplink signal in this step 120 to determine the respective corresponding frequency compensation values of at least one first TRP may adopt but not be limited to the following implementations:

(1-1-1) Use the first uplink signal to perform frequency offset estimation to obtain a frequency offset estimation result.

Preferably, the frequency offset estimation may be performed on the first uplink signal corresponding to the at least one first TRP to obtain an estimated frequency offset value corresponding to the at least one first TRP.

The first uplink signals corresponding to the first TRPs may be the same uplink signal, or may be different uplink signals.

Preferably, when each first TRP is divided into one or more TRP groups, frequency offset estimation can be performed on the first uplink signal corresponding to a first TRP in each TRP group to obtain the corresponding frequency offset of the TRP group. estimated value. Preferably, the estimated frequency offset corresponding to the TRP group to which any one of the first TRPs is located is further used as the estimated frequency offset corresponding to the first TRP.

(1-1-2) Determine the reference point for frequency compensation.

Specifically, each first TRP determines the frequency compensation value based on the same reference point, which can ensure that the Doppler received by the terminal after compensation is similar. For example, the difference between the respective first TRP frequency compensation values is equal to their one-way Doppler difference between each other.

Preferably, the reference points corresponding to each of the first TRPs may be the same reference point.

Preferably, when each first TRP is divided into one or more TRP groups, the reference points corresponding to each TRP group may be the same reference point.

It should be noted that the execution order of the above steps (1-1-1) and (1-1-2) is not specifically limited here, that is, the above steps (1-1-1) and (1-1- 2) The two steps may not be specifically distinguished.

(1-1-3) According to the frequency offset estimation result and the reference point, determine the corresponding frequency compensation value of at least one first TRP.

Specifically, the frequency compensation value corresponding to each first TRP may be determined according to the estimated frequency offset corresponding to each first TRP and the same reference point corresponding to each first TRP.

For example, if the reference point is fr, and the estimated frequency offset estimated by the nth first TRP is fn, then the frequency compensation value of the nth first TRP is fr-fn. Assuming that the nth first TRP should send the downlink signal at the frequency fx, it needs to be adjusted to send the downlink signal at the frequency fx+fr-fn.

where the reference point may be 0. At this time, if the estimated frequency offset value of the nth first TRP is fn, the frequency compensation value of the nth first TRP is -fn. Assuming that the n-th first TRP should send the downlink signal at the frequency fx, it needs to be adjusted to send the downlink signal at the frequency fx-fn.

Through the adjustment of the above embodiment, when the reference point is fr, the frequency of the downlink signal received by the terminal from any one of the first TRPs will be around fx+fy, where fy is the frequency compensation value of any one of the first TRPs The difference from the Doppler shift from the first TRP to the terminal.

It can be seen from the above embodiment that the first uplink signal can be used to perform frequency offset estimation to obtain a frequency offset estimation result, and to determine a reference point for determining the frequency compensation value, and to determine the frequency offset estimation result and the reference point according to the frequency offset estimation result and the reference point. The frequency compensation values corresponding to the respective first TRPs can achieve the effect of eliminating too large a Doppler extension range received by the terminal.

Further, on the basis of the above method, the reference point used for frequency compensation in (1-1-2) can be determined in but not limited to the following implementations:

(1-2-1) Determine the reference point according to the setting rule.

Specifically, the reference point for determining the frequency compensation value may be determined by the network side device. For example; according to some predefined rules to determine.

Further, on the basis of the above method, the setting rule in (1-2-1) may include but is not limited to any of the following:

(1-2-2) The reference point is a frequency offset estimation value or a frequency compensation value corresponding to the specified first TRP determined by the network side device;

(1-2-3) The reference point is the estimated frequency offset with the largest absolute value among the estimated frequency offsets corresponding to each first TRP determined by the network side device;

(1-2-4) The reference point is the frequency offset estimation value with the smallest absolute value among the frequency offset estimation values corresponding to each first TRP determined by the network side device;

(1-2-5) The reference point is the maximum value among the absolute values of the frequency offset estimation values corresponding to each first TRP determined by the network side device;

(1-2-6) The reference point is the minimum value among the absolute values of the frequency offset estimation values corresponding to each first TRP determined by the network side device;

(1-2-7) The reference point is an uplink frequency point determined by the network side device.

Preferably, when each first TRP is divided into one or a plurality of TRP groups, correspondingly, the above (1-2-2) may be: the reference point is the frequency offset estimation value corresponding to the designated or selected TRP group or frequency compensation value; the above (1-2-3) may be: the reference point is the frequency offset estimated value with the largest absolute value among the frequency offset estimated values corresponding to each TRP group; the above (1-2-4) may be: the The reference point is the frequency offset estimated value with the smallest absolute value among the frequency offset estimated values corresponding to each TRP group; the above (1-2-5) may be: the reference point is the absolute value of the frequency offset estimated value corresponding to each TRP group. The maximum value of ; the above (1-2-6) may be: the reference point is the minimum value among the absolute values of the frequency offset estimation values corresponding to each TRP group.

It can be seen from the above embodiments that the reference point can be determined according to the setting rule, and then the frequency compensation value corresponding to each first TRP/TRP group can be determined according to the reference point, thereby improving the reliability of determining the reference point.

Further, on the basis of the above method, the reference point used for frequency compensation in (1-1-2) can be determined in but not limited to the following implementations:

(1-3-1) Determine the reference point according to the reference point indication information sent by the terminal.

Specifically, the reference point for determining the frequency compensation value may be determined by the network side device. For example, it is determined according to the reference point indication information sent by the terminal.

Further, based on the above method, the reference point indication information in (1-3-1) may include any of the following:

(1-3-2) The reference point indication information is the indication information about the designated first TRP; wherein, the frequency offset estimation value corresponding to the designated first TRP is the reference point;

(1-3-3) The reference point indication information is indication information about the downlink signal; wherein, the estimated frequency offset corresponding to the first TRP associated with the indication information of the downlink signal is the reference point;

(1-3-4) The reference point indication information is indication information about the first uplink signal; wherein the frequency offset estimated value estimated by the network side device using the first uplink signal indicated by the indication information is the reference point.

Preferably, the first TRP in the indication information about the first TRP in the above (1-3-2) refers to a designated or selected TRP, and the reference point is the frequency offset corresponding to the designated or selected TRP. estimated value. Wherein, the indication information about the first TRP may refer to information indicating the identity of the first TRP.

Preferably, when each first TRP is divided into one or more TRP groups, the reference point indication information in the above (1-3-2) may also be indication information of a designated or selected TRP group. And, the reference point is the estimated frequency offset corresponding to the designated or selected TRP group. Wherein, the indication information about the designated or selected TRP group may refer to information indicating the identity of the designated or selected TRP group.

The indication information about the downlink signal in the above (1-3-3) may refer to an SSB (Synchronization Signal Block, synchronization signal block) identifier, a TRS (Tracking Refernece Signal, tracking reference signal) identifier, and the like. The indication information about the downlink signal is associated with the TRP, the associated TRP can be determined according to the indication information, and the reference point is the frequency offset estimated value estimated by the network side at the TRP. Alternatively, the network side uses other methods to determine the reference point according to the information obtained by the TRP associated with the indication information of the downlink signal. Note that SSB is sometimes also written as SS/PBCH block, namely Synchronization Signal/Physical Broadcast Channel Block Synchronization Signal/Broadcast Information Channel Block.

In the above (1-3-4), when the reference point indication information is the indication information about the first uplink signal, the reference point may be the frequency offset estimate estimated by the network side equipment using the uplink signal indicated by the indication information value.

It can be seen from the above embodiments that the reference point can be determined according to the reference point indication information sent by the terminal, and then the frequency compensation values corresponding to each of the first TRP/TRP groups can be determined according to the reference point, thereby enriching the implementation of determining the reference point. Improved flexibility in determining reference points.

Further, on the basis of the above method, the use of the first uplink signal in this step 120 to determine the respective corresponding frequency compensation values of the at least one first TRP may adopt but not be limited to the following implementations:

(1-4-1) The at least one first TRP uses the first uplink signal to determine the corresponding frequency compensation value; or

Preferably, each first TRP uses the first uplink signal to determine its corresponding frequency compensation value.

Preferably, when each first TRP is divided into one or more TRP groups, each TRP group can use the first uplink signal to determine its corresponding frequency compensation value, and then further determine the corresponding frequency compensation value of each first TRP. . Wherein, for all the first TRPs in each TRP group, the corresponding frequency compensation values may be the same, which are the frequency compensation values corresponding to the TRP group.

Preferably, a first TRP or a first TRP group uses a first uplink signal to determine its corresponding frequency compensation value as follows: using the first uplink signal for frequency offset estimation, and using the frequency offset estimation value as the frequency compensation value.

Preferably, a first TRP or a first TRP group uses a first uplink signal to determine its corresponding frequency compensation value as follows: using the first uplink signal received by itself to perform frequency offset estimation, and using the frequency offset estimation value. Negative values are used as frequency compensation values.

(1-4-2) The central processing unit connected to the first TRP included in the network-side device uses the first uplink signal to determine the corresponding frequency compensation value of at least one first TRP.

Preferably, when at least one first TRP is divided into one or more TRP groups, the central processing unit can use the first uplink signal to determine the frequency compensation value corresponding to each TRP group, and then further determine that the at least one first TRP corresponds to each of them. frequency compensation value. Wherein, for all the first TRPs in each TRP group, the corresponding frequency compensation values may be the same, which are the frequency compensation values corresponding to the TRP group.

Preferably, the method that the central processing unit uses the first uplink signal to determine the frequency compensation value corresponding to each TRP or TRP group is: performing frequency offset estimation for the first uplink signal received by each TRP or TRP group, using the frequency offset estimation value. as the frequency compensation value.

Preferably, the method that the central processing unit uses the first uplink signal to determine the frequency compensation value corresponding to each TRP or TRP group is: performing frequency offset estimation for the first uplink signal received by each TRP or TRP group, using the frequency offset estimation value. The negative value of is used as the frequency compensation value.

In addition, the central processing unit in this embodiment of the present invention may be a processing unit of a network-side device, or may be a BBU, etc., and is applicable to all the following embodiments, which will not be described in detail later.

It can be seen from the above embodiment that when the first uplink signal is used to determine the corresponding frequency compensation value of each first TRP/TRP group, each first TRP/TRP group can determine the corresponding frequency compensation value, or it can be The central processing unit obtains the corresponding frequency compensation values of each first TRP/TRP group, thereby enriching the implementation manner of determining the frequency compensation value and improving the flexibility of determining the frequency compensation value.

Further, on the basis of the above method, the reference point used for frequency compensation in (1-1-2) can be determined in but not limited to the following implementations:

(1-5-1) The at least one first TRP determines the reference point according to the frequency offset estimation result;

Preferably, when at least one first TRP is divided into one or more TRP groups, the reference point may be determined by each TRP group. For example, the reference point may be determined by a first TRP in each TRP group instead of all TRP groups in each TRP group.

(1-5-2) The central processing unit connected to the first TRP included in the network side device determines the reference point according to the frequency offset estimation result.

It can be seen from the above embodiment that when determining the reference point for determining the frequency compensation value, it can be determined by each first TRP/TRP group or by the central processing unit, thereby enriching the implementation of determining the reference point. , which improves the flexibility of determining the reference point.

Further, on the basis of the above method, the at least one first TRP in (1-5-1) determines the reference point according to the frequency offset estimation result, which can be implemented by but not limited to the following:

At least one first TRP performs information exchange on its corresponding frequency offset estimation value, and determines its own corresponding reference point for determining frequency compensation according to the information exchanged.

Specifically, the at least one first TRP can use the first uplink signal to estimate the frequency offset (or estimate the Doppler frequency offset) respectively, the at least one first TRP can exchange information with each other to determine the reference point, and the at least one first TRP is based on The same reference point determines the transmission frequency for downlink transmission.

Preferably, when at least one first TRP is divided into one or a plurality of TRP groups, each TRP group can perform information exchange on the frequency offset estimation values corresponding to each group, and determine the corresponding frequency offset estimates of each group according to the information of the information exchange. Determine the reference point for frequency compensation.

It can be seen from the above embodiment that each first TRP or TRP group performs information exchange on the corresponding frequency offset estimation values, and determines its own corresponding reference point for determining frequency compensation according to the information exchanged, thereby realizing the Each first TRP or TRP group jointly determines the same reference point, which enriches the implementation manner of determining the reference point and improves the flexibility of determining the reference point.

Further, on the basis of the above method, in this (1-1-3), according to the frequency offset estimation result and the reference point, determine the respective corresponding frequency compensation values of at least one first TRP, which can be adopted but not limited to The following implementations:

(1-6-1) The at least one first TRP determines the corresponding frequency compensation value according to the frequency offset estimation result and the reference point; or

(1-6-2) The central processing unit connected to the first TRP included in the network side device determines the corresponding frequency compensation value of at least one first TRP according to the frequency offset estimation result and the reference point.

Preferably, when at least one first TRP is divided into one or a plurality of TRP groups, in the above (1-6-1), each TRP group can be used to determine the respective TRP groups according to the frequency offset estimation result and the reference point. The corresponding frequency compensation value is further determined, and the corresponding frequency compensation value of the at least one first TRP is further determined. Wherein, for all the first TRPs in each TRP group, the corresponding frequency compensation values may be the same, which are the frequency compensation values corresponding to the TRP group.

Preferably, when at least one first TRP is divided into one or a plurality of TRP groups, the central processing unit in the above-mentioned (1-6-2) can determine the respective TRP groups according to the frequency offset estimation result and the reference point. The corresponding frequency compensation value is further determined, and the corresponding frequency compensation value of each first TRP is further determined. Wherein, for all the first TRPs in each TRP group, the corresponding frequency compensation values may be the same, which are the frequency compensation values corresponding to the TRP group.

Preferably, each TRP or TRP group determines the frequency compensation value corresponding to each TRP or TRP group according to the frequency offset estimation result and the reference point: using the frequency offset estimation value plus the reference point as the frequency compensation value.

Preferably, each TRP or TRP group determines the frequency compensation value corresponding to each TRP or TRP group according to the frequency offset estimation result and the reference point: using the reference point minus the corresponding frequency offset estimation value as the frequency compensation value.

Preferably, the central processing unit determines, according to the frequency offset estimation result and the reference point, the method for determining the frequency compensation value corresponding to each TRP or TRP group: for each TRP or TRP group, use the corresponding frequency offset estimation value plus the reference point. as the frequency compensation value.

Preferably, the central processing unit determines the frequency compensation value corresponding to each TRP or TRP group according to the frequency offset estimation result and the reference point as follows: for each TRP or TRP group, use the reference point to subtract the corresponding frequency offset estimation value. as the frequency compensation value.

It can be seen from the above embodiment that when determining the corresponding frequency compensation value of each first TRP according to the frequency offset estimation result and the reference point, it can be determined by each first TRP/TRP group, or it can be determined by the central processing unit. Therefore, the implementation manner of determining the frequency compensation value is enriched, and the flexibility of determining the frequency compensation value is improved.

Further, on the basis of the above method, at least one first TRP in this (1-6-1) determines the corresponding frequency compensation value according to the frequency offset estimation result and the reference point, which can be used but not limited to The following implementations:

At least one first TRP determines its corresponding frequency compensation value according to its corresponding frequency offset estimation value and the reference point.

Preferably, when each first TRP is divided into one or more TRP groups, each TRP group can determine its own corresponding frequency compensation value according to its own corresponding frequency offset estimation value and reference point, and then further determine each A frequency compensation value corresponding to each TRP. Wherein, for all the first TRPs in each TRP group, the corresponding frequency compensation values may be the same, which are the frequency compensation values corresponding to the TRP group.

The frequency offset estimation value of each TRP group may be a frequency offset estimation value of the first uplink signal corresponding to a first TRP in each TRP group to obtain the frequency offset estimation value corresponding to the TRP group.

It can be seen from the above-mentioned embodiment that each first TRP/TRP group can determine the frequency offset estimated value corresponding to itself, and determine the frequency corresponding to itself according to the frequency offset estimated value corresponding to itself and the same reference point corresponding to each first TRP. Compensation value, thereby enriching the implementation of determining the frequency compensation value and improving the flexibility of determining the frequency compensation value.

Further, on the basis of the above method, in this (1-1-3), according to the frequency offset estimation result and the reference point, to determine the respective corresponding frequency compensation values, but not limited to the following implementations:

(1-7-1) The second TRP determines the frequency compensation value corresponding to itself according to the frequency offset estimated value corresponding to itself, and sends the determined frequency compensation value or the frequency offset estimated value corresponding to the second TRP to the third TRP TRP; wherein, the second TRP is used to characterize a part of the TRP in the first TRP, and the third TRP is used to characterize another part of the TRP in the first TRP.

Correspondingly, in this step 130, according to the corresponding frequency compensation value of the at least one first TRP, to determine the respective transmission frequencies of the at least one first TRP used for downlink transmission, the following implementations may be adopted but not limited to:

(1-7-2) The second TRP determines its own transmission frequency for downlink transmission according to the frequency compensation value determined by itself;

(1-7-3) The third TRP determines its own transmission frequency for downlink transmission according to the frequency compensation value determined by the second TRP or the frequency offset estimation value corresponding to the second TRP.

Specifically, each first TRP uses the first uplink signal to perform frequency offset estimation (or Doppler frequency offset estimation) respectively, and the second TRP determines its own corresponding frequency compensation value according to its own corresponding frequency offset estimation value, and sends the corresponding frequency compensation value to the first TRP. The third TRP sends its own estimated frequency compensation value, and the third TRP determines its own frequency compensation value according to the frequency compensation value sent by the part of the RRH, and uses the frequency compensation value to determine the transmission frequency for downlink transmission.

Wherein, the second TRP may be a first TRP or a TRP group. Wherein, one TRP group may contain one or more TRPs.

It can be seen from the above embodiment that the second TRP determines its own transmission frequency for downlink transmission according to the frequency compensation value determined by itself; the third TRP determines the frequency compensation value or the frequency corresponding to the second TRP according to the frequency compensation value determined by the second TRP. The bias estimation value is used to determine the transmission frequency used for downlink transmission, thereby reducing the complexity of determining the frequency compensation value and improving the efficiency of frequency compensation.

Further, on the basis of the above method, the use of the first uplink signal in this step 120 to determine the respective corresponding frequency compensation values of at least one first TRP may adopt but not be limited to the following implementations:

(1-8-1) At least one first TRP performs frequency offset estimation on the first uplink signal, respectively, to obtain respective corresponding frequency offset estimation values;

(1-8-2) At least one first TRP determines a corresponding frequency compensation value according to the corresponding frequency offset estimation value.

Preferably, in the above (1-8-1), when each first TRP is divided into one or a plurality of TRP groups, the frequency offset estimation can be performed on the first uplink signal by each TRP group to obtain the corresponding Frequency offset estimate. The frequency offset estimation value of each TRP group may be a frequency offset estimation value of the first uplink signal corresponding to a first TRP in each TRP group to obtain the frequency offset estimation value corresponding to the TRP group.

In addition, in (1-8-1), each first TRP can perform the frequency offset estimation of the first uplink signal respectively to obtain the corresponding frequency offset estimation value, and the connection included in the network side equipment can also be used. The central processing unit of the first TRP performs frequency offset estimation using the first uplink signal, obtains the corresponding frequency offset estimation value of each first TRP, and determines the corresponding frequency compensation value of each first TRP.

Preferably, when each first TRP is divided into one or more TRP groups, the central processing unit may perform frequency offset estimation on the first uplink signal to obtain an estimated frequency offset corresponding to each TRP group. The frequency offset estimation value of each TRP group may be a frequency offset estimation value of the first uplink signal corresponding to a first TRP in each TRP group to obtain the frequency offset estimation value corresponding to the TRP group.

In the above (1-8-2), when each first TRP is divided into one or a plurality of TRP groups, each TRP group can determine the corresponding frequency compensation value according to the corresponding frequency offset estimation value, and then further determine The corresponding frequency compensation value of each first TRP is obtained. Wherein, for all the first TRPs in each TRP group, the corresponding frequency compensation values may be the same, which are the frequency compensation values corresponding to the TRP group.

In addition, in addition to (1-8-2), each first TRP can determine the corresponding frequency compensation value according to the corresponding frequency offset estimation value, and also can be included in the network side device. The central processing unit determines the frequency compensation value corresponding to each first TRP according to the frequency offset estimation value corresponding to each first TRP.

Preferably, when each first TRP is divided into one or a plurality of TRP groups, the central processing unit can determine the frequency compensation value corresponding to each TRP group according to the frequency offset estimation value of each TRP group, and then further determine each TRP group. The respective corresponding frequency compensation values of the first TRPs. Wherein, for all the first TRPs in each TRP group, the corresponding frequency compensation values may be the same, which are the frequency compensation values corresponding to the TRP group.

Preferably, each TRP or TRP group determines the corresponding frequency compensation value according to the frequency offset estimation result as follows: using the frequency offset estimation value as the frequency compensation value.

Preferably, each TRP or TRP group determines the corresponding frequency compensation value according to the frequency offset estimation result as follows: using the negative value of the frequency offset estimation value as the frequency compensation value.

Preferably, the method for the central processing unit to determine the frequency compensation value corresponding to each TRP or TRP group according to the frequency offset estimation result is: for each TRP or TRP group, use the corresponding frequency offset estimation value as the frequency compensation value.

Preferably, the central processing unit determines the frequency compensation value corresponding to each TRP or TRP group according to the frequency offset estimation result as follows: for each TRP or TRP group, use the negative value of the corresponding frequency offset estimation value as the frequency compensation value. .

It can be seen from the above embodiment that when the reference point for determining the frequency compensation value is 0, each first TRP/TRP group performs frequency offset estimation (or estimated Doppler frequency offset) on the first uplink signal respectively. , the corresponding frequency compensation value can be determined directly according to the corresponding frequency offset estimation value, which further improves the efficiency of frequency compensation.

Further, based on the above method, the downlink transmission in step 130 may include the transmission of terminal-specific downlink signals.

Specifically, the transmission of terminal-specific downlink signals includes but is not limited to: PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel), terminal-specific PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel), DMRS of PDSCH, DMRS of PDCCH, PT-RS (Phase Reference Signal), etc.

It can be seen from the above-mentioned embodiments that the respective transmission frequencies of the respective first TRPs used for downlink transmission are determined according to the corresponding frequency compensation values of the respective first TRPs, so that when the terminal-specific downlink signal is transmitted, the terminal can be effectively eliminated. The Doppler extension on the side further improves the transmission performance of terminal-specific downlink signals.

Further, on the basis of the above method, in this (1-1-1), using the first uplink signal to perform frequency offset estimation to obtain a frequency offset estimation result, the following implementations can be adopted but not limited to:

(1-9-1) At least one first TRP performs frequency offset estimation on the first uplink signal, respectively, to obtain respective corresponding frequency offset estimation values.

Preferably, when each first TRP is divided into one or more TRP groups, each TRP group may perform frequency offset estimation on the first uplink signal, respectively, to obtain respective corresponding frequency offset estimation values. The frequency offset estimation value of each TRP group may be a frequency offset estimation value of the first uplink signal corresponding to a first TRP in each TRP group to obtain the frequency offset estimation value corresponding to the TRP group.

It can be seen from the above embodiment that when using the first uplink signal to perform frequency offset estimation to obtain the frequency offset estimation result, each first TRP/TRP group may perform frequency offset estimation on the first uplink signal respectively to obtain the corresponding frequency offset estimation value, thereby improving the efficiency of determining the frequency offset estimation value.

Further, based on the above method, each first TRP in (1-8-1) and (1-9-1) can use the same first uplink signal to perform frequency offset of each first TRP estimate.

Further, on the basis of the above method, the first uplink signals in (1-8-1) and (1-9-1) may include the respective corresponding first TRPs for frequency offset estimation. The second uplink signal; correspondingly, each of the first TRPs in the (1-8-1) and (1-9-1) respectively performs frequency offset estimation on the first uplink signal to obtain the corresponding frequency offset. The estimated value can be implemented in but not limited to the following ways:

(1-10-1) At least one first TRP performs frequency offset estimation on the respective corresponding second uplink signals, respectively, to obtain respective corresponding frequency offset estimation values.

It can be seen from the above embodiments that each first TRP can use the same first uplink signal to perform frequency offset estimation, and can also use the corresponding second uplink signal to perform frequency offset estimation respectively, thereby enriching the implementation of frequency offset estimation and improving the frequency offset estimation. The flexibility of frequency offset estimation is improved.

Further, based on the above method, it also includes:

(1-11-1) Send the association relationship between the at least one first TRP and the second uplink signal to the terminal. Preferably, the association is indicated by any of the following messages:

Spatial Relation Info of the second uplink signal;

the TCI (Transmission Configuration Indicator) status of the second uplink signal;

The second uplink signal QCL (Quasi Co-Location, Quasi Co-Location) indicates information.

The spatial relationship information can be used to indicate the downlink signal associated with the second uplink signal, so that the transmission spatial filter of the uplink signal is determined according to the reception spatial filter of the downlink signal (or the transmission of the uplink signal is determined according to the reception beam of the downlink signal). beam), the first TRP/first TRP group used for transmitting the downlink signal is the first TRP/first TRP group receiving the uplink signal.

Preferably, the form of the TCI (Transmission Configuration Indicator) state of the second uplink signal is similar to that of the TCI state of the downlink signal in the NR system or the LTE system. For example, a TCI state contains a certain QCL type of downstream signal used to determine the upstream signal.

Preferably, the QCL indication information includes a type of QCL, such as Doppler shift, Doppler spread, and the like. Alternatively, the QCL indication information is used to indicate the associated downlink signal, and the first TRP/first TRP group that transmits the downlink signal is the same as the first TRP/first TRP group that receives the second uplink signal.

It can be seen from the above embodiment that by sending the terminal the association relationship between each first TRP and the second uplink signal, the terminal can send the corresponding first uplink signal to the network-side device according to the association relationship. The second uplink signal corresponding to each first TRP and used for frequency offset estimation may be included, thereby improving the reliability of frequency compensation.

FIG. 2 is a flowchart of a frequency compensation method provided by an embodiment of the present invention, and the frequency compensation method can be used in a terminal; as shown in FIG. 2 , the method includes the following steps:

Step 210: Generate a first uplink signal for frequency compensation according to the configuration or instruction of the network side device.

Specifically, the terminal may send the first uplink signal based on the configuration on the network side, that is, the network side sends configuration information, and the terminal sends the first uplink signal according to the configuration information; or the network side sends the configuration information of the first uplink signal , but an indication information is also required to instruct the terminal to send the first uplink signal (for example, through trigger signaling or activation signaling), and the user equipment UE only sends the first uplink signal after receiving the indication information.

Preferably, the network-side device includes a central processing unit and a TRP, and the configuration or instruction of the network-side device may be executed by the central processing unit or by the TRP.

Step 220: Send the first uplink signal to the network side device, so that the network side device uses one or more first TRPs to receive the first uplink signal sent by the terminal, and uses the first uplink signal to determine at least one corresponding first TRP. The frequency compensation value, according to the corresponding frequency compensation value of the at least one first TRP, determines the transmission frequency of the at least one first TRP used for downlink transmission.

Preferably, plural first TRPs are grouped (divided into one or plural TRP groups), and one or plural TRP groups utilize a part of the first TRPs in the group to carry out the first uplink for frequency compensation sent by the terminal. signal reception. For example, each first TRP group uses one first TRP to receive the first uplink signal.

Preferably, at least one of the first TRPs all receive the first uplink signal sent by the terminal for frequency compensation.

The first uplink signal may be an SRS, a random access signal, or other reference signals that can be used for frequency compensation. The random access signal can be sent through PRACH.

In addition, the TRP in the embodiment of the present invention may be an antenna unit group, an RRH, and the like of a network-side device.

It can be seen from the above embodiment that the first uplink signal for frequency compensation can be generated according to the configuration or instruction of the network side device, and the first uplink signal is sent to the network side device, so that the network side device can use one or more The first TRP receives the first uplink signal sent by the terminal; the first uplink signal is used to determine the corresponding frequency compensation value of the at least one first TRP; The transmission frequency used for downlink transmission, so that when at least one first TRP performs downlink transmission, it can use the frequency-compensated transmission frequency for downlink transmission, thereby realizing frequency compensation for at least one first TRP when performing downlink transmission, The Doppler spreading on the terminal side is effectively eliminated, and the performance of downlink transmission is also improved.

Further, on the basis of the above method, the first uplink signal used by at least one first TRP for frequency offset estimation in step 220 may be the same.

Further, based on the above method, in step 220, the first uplink signal includes the second uplink signal corresponding to each first TRP and used for frequency offset estimation.

Further, based on the above method, the frequency compensation method further includes:

(2-1-1) Receive the association relationship between the at least one first TRP and the second uplink signal.

Preferably, the association is indicated by any of the following messages:

Spatial Relation Info of the second uplink signal;

the TCI status of the second upstream signal;

The second uplink signal QCL indicates information.

Further, based on the above method, the association relationship in (2-1-1) indicates the downlink signal associated with the first uplink signal; the frequency compensation method also includes:

(2-2-1) Receive a downlink signal associated with the second uplink signal;

Correspondingly, the sending of the first uplink signal to the network-side device in step 220 may adopt but not be limited to the following implementations:

(2-3-1) Based on the reception of the downlink signal, the first uplink signal is sent to the network side device.

Specifically, the terminal may perform downlink signal detection, obtain downlink frequency points, and send the first uplink signal based on the downlink frequency points. The downlink signal can be SSB or TRS, etc.

Preferably, the terminal determines a downlink frequency point based on a downlink signal, determines an uplink frequency point based on the downlink frequency point, and then uses the uplink frequency point as an uplink frequency point for sending all the first uplink signals.

Preferably, the terminal determines a plurality of downlink frequency points based on the plurality of downlink signals, and determines a plurality of uplink frequency points based on the plurality of downlink frequency points, and then uses these uplink frequency points as the uplink frequency points for sending the first uplink signal. For example, the first uplink signal includes a plurality of second uplink signals, each second uplink signal is associated with a downlink signal sent by a TRP or a TRP group, and the uplink frequency of any second uplink signal is based on its associated The downlink frequency determined by the downlink signal is determined.

Preferably, a method for the terminal to determine the uplink frequency point based on the downlink frequency point is: the uplink frequency point is equal to the downlink frequency point plus the downlink frequency offset. The uplink and downlink frequency deviation is indicated to the terminal by the network device, or specified by the protocol, or determined by the terminal according to the indication information of the network device.

In each embodiment of the present invention, both the uplink frequency point and the downlink frequency point are reference frequencies, that is, frequencies that can be used to determine the frequency positions of the downlink RF information channel and/or the SSB and/or other units. For example, the downlink frequency is a reference frequency used to determine the frequency of downlink transmission such as downlink information channels (eg PDSCH, PDCCH, etc.), SSB, downlink reference signals (eg, downlink DMRS, CSI-RS, TRS). For example, the uplink frequency is a reference frequency used to determine the frequency of uplink transmission such as uplink information channels (PUSCH, PUCCH, PRACH, etc.), uplink reference signals (eg, SRS).

Preferably, the terminal can determine the frequency of the uplink signal based on the downlink signal; determine the transmission spatial filter of the uplink signal according to the reception spatial filter of the downlink signal; determine the transmission beam of the uplink signal according to the reception beam of the downlink signal; and so on.

It can be seen from the above embodiment that for each first TRP, the terminal can send the same first uplink signal, and can also send the second uplink signal corresponding to each first TRP, thereby enriching the frequency compensation method and improving the flexibility of frequency compensation. sex.

The following describes the frequency compensation method shown in FIG. 1 and FIG. 2 with a specific example.

Example 1:

A BBU is connected to 4 TRPs. According to the running direction of the train, the order of the train passing through these TRPs will be TRP1, TRP2, TRP3, TRP4. Assuming that the frequency of the downlink signal is fDL, the estimated Doppler frequency offset of TRP and the terminal is an ideal estimate. The reference point is f0+f1, and the frequency compensation value is the difference between the reference point and the Doppler frequency shift value estimated by TRP.

Among them, the frequency when the downlink signal from each TRP reaches the UE without frequency compensation (assuming that the offset of the downlink signal resource position relative to the downlink frequency point is not considered) is: TRP1 is fDL+f1; TRP2 is fDL+f2; TRP3 is fDL+f2; TRP4 is fDL+f2;

Assume that the uplink frequency point determined by the terminal is: fUL;

Then the frequency of the uplink signal received by the TRP when it reaches the TRP (assuming that the offset of the uplink signal resource position relative to the downlink frequency point is not considered) is: TRP1 is fUL +f1; TRP2 is fUL +f2; TRP3 is fUL +f3; TRP4 is fUL + f4;

TRP uses the following frequency compensation values: TRP1 is f0; TRP2 is f0+f1-f2; TRP3 is f0+f1-f3; TRP4 is f0+f1-f4;

The frequencies of the downlink signals from each TRP arriving at the UE after frequency compensation are: TRP1 is fDL+ f0+f1; TRP2 is fDL+ f0+f1; TRP3 is fDL+ f0+f1; TRP4 is fDL+ f0+f1.

It can be seen that the Doppler frequency shift of the downlink signals from each TRP received by the terminal is the same, and the terminal can more easily estimate the Doppler frequency shift and obtain better downlink reception performance.

Example 2:

A BBU is connected to 4 TRPs. According to the running direction of the train, the order of the train passing through these TRPs will be TRP1, TRP2, TRP3, TRP4. Among them, it is assumed that the Doppler frequency offset estimation of TRP and the terminal is an ideal estimate, and the unidirectional Doppler frequency offsets of TRP1, TRP2, TRP3, and TRP4 are f1, f2, f3, and f4, respectively, and f0 is the uplink frequency determined by the terminal. The difference from the actual line frequency point, the frequency compensation value is the Doppler frequency shift value estimated by the negative TRP.

Among them, the frequency (downlink receiving frequency) of the downlink signal from each TRP reaching the UE without frequency compensation: TRP1 is fDL+f1; TRP2 is fDL+f2; TRP3 is fDL+f2; TRP4 is fDL+f2;

The uplink frequency point determined by the terminal is: fUL;

The frequency when the uplink signal received by TRP reaches TRP: TRP1 is fUL +f1; TRP2 is fUL +f2; TRP3 is fUL +f3; TRP4 is fUL +f4;

Each TRP uses the following frequency compensation values: TRP1 is f0-f1; TRP2 is f0-f2; TRP3 is f0-f2; TRP4 is f0-f2;

The frequencies of the downlink signals from each TRP arriving at the UE after frequency compensation are: TRP1 is fDL+ f0; TRP2 is fDL+ f0; TRP3 is fDL+ f0; TRP4 is fDL+ f0.

It can be seen that under the scheme of the present invention, the Doppler frequency shift of the downlink signals received by the UE from each TRP is the same, and the UE can more easily estimate the Doppler frequency shift and obtain better downlink reception performance. .

FIG. 3 is a block diagram of a module of a frequency compensation device provided by an embodiment of the present invention. The frequency compensation device can be used for network-side equipment. For example, the network-side equipment may include BBU and TRP. As shown in FIG. 3, the frequency Compensation means may include:

The receiving module 31 is used for receiving the first uplink signal for frequency compensation sent by the terminal using one or more first transmission receiving points TRP;

a frequency compensation determination module 32, configured to use the first uplink signal to determine the corresponding frequency compensation value of at least one first TRP;

The transmission frequency determination module 33 is configured to determine the respective transmission frequencies of the at least one first TRP used for downlink transmission according to the corresponding frequency compensation value of the at least one first TRP.

Further, based on the above-mentioned device, the frequency compensation determination module is configured to use the first uplink signal to determine the frequency compensation value corresponding to each of the first TRPs.

Further, based on the above-mentioned device, the frequency compensation determination module comprises:

a frequency offset estimation sub-module, used for performing frequency offset estimation using the first uplink signal to obtain a frequency offset estimation result;

The reference point determination sub-module is used to determine the reference point for frequency compensation;

The frequency compensation value determination sub-module is configured to determine the frequency compensation value corresponding to each of the at least one first TRP according to the frequency offset estimation result and the reference point.

Further, based on the above-mentioned device, the frequency offset estimation sub-module is specifically used for:

The at least one first TRP performs frequency offset estimation on the first uplink signal, respectively, to obtain respective corresponding frequency offset estimation values.

Further, on the basis of the above-mentioned device, the reference point determination sub-module is specifically used for:

The reference point is determined according to the set rule or the reference point indication information sent by the terminal.

Further, based on the above device, the setting rule includes any of the following:

The reference point is the frequency offset estimation value corresponding to the designated first TRP determined by the network side device;

The reference point is the estimated frequency offset with the largest absolute value among the estimated frequency offsets corresponding to each first TRP determined by the network side device;

The reference point is the estimated frequency offset with the smallest absolute value among the estimated frequency offsets corresponding to each first TRP determined by the network side device;

The reference point is the maximum value among the absolute values of the frequency offset estimation values corresponding to each first TRP determined by the network side device;

The reference point is the minimum value among the absolute values of the frequency offset estimation values corresponding to each first TRP determined by the network side device.

Further, based on the above device, the reference point indication information includes any of the following:

The reference point indication information is indication information about the designated first TRP; wherein, the frequency offset estimation value corresponding to the designated first TRP is the reference point;

The reference point indication information is indication information about the downlink signal; wherein, the estimated frequency offset corresponding to the first TRP associated with the indication information of the downlink signal is the reference point;

The reference point indication information is indication information about the first uplink signal; wherein, the frequency offset estimated value estimated by the network side device using the first uplink signal indicated by the indication information is the reference point.

Further, on the basis of the above-mentioned device, the reference point determination submodule includes:

a first determining unit, used for the at least one first TRP to determine the reference point according to the frequency offset estimation result; or

The second determining unit is used for the central processing unit connected to the first TRP included in the network side device to determine the reference point according to the frequency offset estimation result.

Further, based on the above-mentioned device, the first determining unit is specifically used for:

At least one first TRP performs information exchange on its corresponding frequency offset estimation value, and determines its own corresponding reference point for determining frequency compensation according to the information exchanged.

Further, based on the above-mentioned device, the frequency compensation value determination sub-module includes:

a third determining unit, specifically configured for the at least one first TRP to determine the corresponding frequency compensation value according to the frequency offset estimation result and the reference point; or

The fourth determining unit is specifically used for the central processing unit connected to the first TRP included in the network side device to determine the respective frequency compensation values of the at least one first TRP according to the frequency offset estimation result and the reference point.

Further, on the basis of the above device, the third determining unit is specifically used for:

The at least one first TRP determines a frequency compensation value corresponding to itself according to the estimated frequency offset value corresponding to itself and the reference point.

Further, on the basis of the above-mentioned device, the frequency compensation value determination sub-module is specifically used for:

The second TRP determines the frequency compensation value corresponding to itself according to the frequency offset estimated value corresponding to itself, and sends the determined frequency compensation value or the frequency offset estimated value corresponding to the second TRP to the third TRP; wherein the second TRP Used to characterize a part of TRPs in the first TRP, and the third TRP is used to characterize another part of TRPs in the first TRP.

Further, based on the above-mentioned device, the transmission frequency determination module includes:

The first frequency determination submodule is used for the second TRP to determine its own transmission frequency for downlink transmission according to the frequency compensation value determined by itself;

The second frequency determination sub-module is used for the third TRP to determine its own transmission frequency for downlink transmission according to the frequency compensation value determined by the second TRP or the frequency offset estimation value corresponding to the second TRP.

Further, based on the above-mentioned device, the frequency compensation determination module comprises:

a first processing sub-module for the at least one first TRP to use the first uplink signal to determine a corresponding frequency compensation value; or

The second processing sub-module is used for the central processing unit connected to the first TRP included in the network side device to determine the corresponding frequency compensation value of the at least one first TRP by using the first uplink signal.

Further, based on the above-mentioned device, the first processing sub-module is specifically used for:

The at least one first TRP respectively performs frequency offset estimation on the first uplink signal to obtain respective corresponding frequency offset estimation values;

The at least one first TRP determines a corresponding frequency compensation value according to the corresponding frequency offset estimation value.

Further, based on the above-mentioned device, the first uplink signal includes a second uplink signal corresponding to each first TRP for performing frequency offset estimation;

The at least one first TRP performs frequency offset estimation on the first uplink signal, respectively, to obtain respective corresponding frequency offset estimation values, including:

The at least one first TRP performs frequency offset estimation on the respective corresponding second uplink signals to obtain respective corresponding frequency offset estimation values.

Further, based on the above-mentioned device, it also includes:

The association relationship sending module is used for sending the association relationship between the at least one first TRP and the second uplink signal to the terminal.

Further, based on the above device, the association relationship is indicated by any of the following messages:

spatial relationship information of the second uplink signal;

The transmission configuration of the second uplink signal indicates the TCI state;

The second uplink signal is quasi-co-located QCL indicating information.

It should be noted here that the apparatus provided in this embodiment can implement all the method steps that can be implemented by the above method embodiments, and can achieve the same beneficial effects, and the apparatus in this embodiment and the above method embodiments will not be discussed here. The same content and beneficial effects are described in detail.

FIG. 4 is a block diagram of a module of a frequency compensation apparatus provided by an embodiment of the present invention, and the frequency compensation apparatus can be used in a terminal; as shown in FIG. 4 , the frequency compensation apparatus may include:

The generating module 41 is used for generating the first uplink signal for frequency compensation according to the configuration or instruction of the network side device;

The sending module 42 is used for sending the first uplink signal to the network side equipment, so that the network side equipment uses one or more first transmission and reception points TRP to receive the first uplink signal sent by the terminal, and uses the first uplink signal The signal determines a frequency compensation value corresponding to the at least one first TRP, and determines a transmission frequency used for downlink transmission of the at least one first TRP according to the frequency compensation value corresponding to the at least one first TRP.

Further, based on the above-mentioned apparatus, the first uplink signals used by at least one first TRP for frequency offset estimation are the same.

Further, based on the above device, the first uplink signal includes second uplink signals corresponding to each of the first TRPs and used for frequency offset estimation.

Further, based on the above device, the frequency compensation device also includes:

The association relationship receiving module is used to receive the association relationship between the at least one first TRP and the second uplink signal; preferably, the association relationship is indicated by any of the following messages:

spatial relationship information of the second uplink signal;

The transmission configuration of the second uplink signal indicates the TCI state;

The second uplink signal is quasi-co-located QCL indicating information.

Further, based on the above-mentioned device, the association relationship indicates the downlink signal associated with the first uplink signal; the frequency compensation device also includes:

an association relationship receiving module for receiving a downlink signal associated with the second uplink signal;

Correspondingly, the sending module 42 may include:

The sending sub-module is used for sending the first uplink signal to the network side device based on the reception of the downlink signal.

It should be noted here that the apparatus provided in this embodiment can implement all the method steps that can be implemented by the above method embodiments, and can achieve the same beneficial effects, and the apparatus in this embodiment and the above method embodiments will not be discussed here. The same content and beneficial effects are described in detail.

FIG. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention. As shown in FIG. 5 , the terminal 500 may include: at least one processor 501 , memory 502 , at least one network interface 504 and other user interfaces 503 . The various components in terminal 500 are coupled together through busbar system 505 . It can be understood that the busbar system 505 is used to implement the connection communication between these components. In addition to the data bus, the bus system 505 also includes a power bus, a control bus, and a status signal bus. However, for clarity of illustration, the various busbars are labeled as busbar system 505 in FIG. 5 .

The user interface 503 may include a display, a keyboard, or a pointing device, such as a mouse, a trackball, a touchpad, or a touchscreen.

It can be understood that the memory 502 in the embodiment of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM) ), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache memory. By way of example and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous Dynamic RAM ( Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM). The memory 502 of the systems and methods described in various embodiments of the present invention is intended to include, but not be limited to, these and any other suitable types of memory.

In some embodiments, the memory 502 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set of them, such as an operating system 5021 and applications 5022.

The operating system 5021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks. The application program 5022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., for implementing various application services. The program for implementing the method of the embodiment of the present invention may be included in the application program 5022 .

In this embodiment of the present invention, by calling the computer program or instruction stored in the memory 502, specifically, the computer program or instruction stored in the application program 5022, the processor 501 is used for:

Generate a first uplink signal for frequency compensation according to the configuration or instruction of the network-side device;

Send the first uplink signal to the network side device, so that the network side device uses one or more first transmission and reception points TRP to receive the first uplink signal sent by the terminal, and uses the first uplink signal to determine at least one first TRP The respective corresponding frequency compensation values, according to the respective corresponding frequency compensation values of the at least one first TRP, determine the respective transmission frequencies of the at least one first TRP used for downlink transmission.

The methods disclosed in the above embodiments of the present invention may be applied to the processor 501, or implemented by the processor 501. The processor 501 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method can be completed through the hardware integrated logic circuit in the processor 501 or the instructions in the form of software. The above-mentioned processor 501 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or others. Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present invention may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in random memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in the art. The storage medium is located in the memory 502, and the processor 501 reads the information in the memory 502, and completes the steps of the above method in combination with its hardware.

It will be appreciated that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more Application Specific Integrated Circuits (ASIC), Digital Signal Processing (DSP), Digital Signal Processing Device (DSP Device, DSPD), Programmable Logic Device (PLD), Field-Programmable Gate Array (FPGA), general-purpose processor, controller, microcontroller, microprocessor, and others for performing the function of the present invention electronic unit or a combination thereof.

For software implementation, the technology can be implemented through modules (eg, procedures, functions, etc.) that execute the functions in the embodiments of the present invention. Software codes can be stored in memory and executed by a processor. Memory can be implemented in the processor or external to the processor.

Preferably, as another embodiment, the processor 501 is further configured to: the first uplink signals used by at least one first TRP for frequency offset estimation are the same.

Preferably, as another embodiment, the processor 501 is further configured to: the first uplink signal includes a second uplink signal corresponding to each first TRP and used for frequency offset estimation.

Preferably, as another embodiment, the processor 501 is further configured to: receive the association relationship between the at least one first TRP and the second uplink signal; preferably, the association relationship is indicated by any one of the following messages:

spatial relationship information of the second uplink signal;

The transmission configuration of the second uplink signal indicates the TCI state;

The second uplink signal is quasi-co-located QCL indicating information.

Preferably, as another embodiment, the association relationship indicates a downlink signal associated with the first uplink signal; the processor 501 is further configured to:

receiving a downlink signal associated with the second uplink signal;

Sending the first uplink signal to the network-side device includes:

Based on the reception of the downlink signal, the first uplink signal is sent to the network side device.

The terminal provided in this embodiment of the present invention can implement each process implemented by the terminal in the foregoing embodiments, and to avoid repetition, details are not described herein again.

It can be seen from the above embodiment that the first uplink signal for frequency compensation can be generated according to the configuration or instruction of the network side device, and the first uplink signal is sent to the network side device, so that the network side device can use one or more The first TRP receives the first uplink signal sent by the terminal; the first uplink signal is used to determine the corresponding frequency compensation value of the at least one first TRP; The transmission frequency used for downlink transmission, so that when at least one first TRP performs downlink transmission, it can use the frequency-compensated transmission frequency for downlink transmission, thereby realizing frequency compensation for at least one first TRP when performing downlink transmission, The Doppler spreading on the terminal side is effectively eliminated, and the performance of downlink transmission is also improved.

6 is a schematic structural diagram of another terminal provided by an embodiment of the present invention. The terminal in FIG. 6 may be a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), or an electronic reader, a handheld game console, a sales Terminal (Point of Sales, POS), vehicle electronic equipment (vehicle computer), etc. As shown in FIG. 6 , the terminal includes a radio frequency (RF) circuit 610 , a memory 620 , an input unit 630 , a display unit 640 , a processor 660 , an audio circuit 670 , a WiFi (Wireless Fidelity) module 680 and a power supply 690 . Those with ordinary knowledge in the art can understand that the structure of the mobile phone shown in FIG. 6 does not constitute a limitation on the mobile phone, and may include more or less components than those shown in the figure, or combine some components, or disassemble some components components, or a different arrangement of components.

The input unit 630 can be used for receiving digital or character information input by the user, and generating signal input related to user settings and function control of the terminal. Specifically, in this embodiment of the present invention, the input unit 630 may include a touch panel 6301 . The touch panel 6301, also referred to as a touch screen, can collect the user's touch operations on or near it (such as the user's operations on the touch panel 6301 using any suitable object or accessory such as a finger, a stylus pen, etc.) ), and drive the corresponding connection device according to the preset program. Optionally, the touch panel 6301 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch position of the user, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, and sends the signal to the touch controller. It is converted into contact coordinates, and then sent to the processor 660, and can receive commands sent by the processor 660 and execute them. In addition, the touch panel 6301 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch panel 6301, the input unit 630 may also include other input devices 6302, and the other input devices 6302 may be used to receive input numerical or character information, and generate key signal input related to user settings and function control of the terminal. Specifically, other input devices 6302 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, joysticks, optical mice (optical mice are touch-sensitive mice that do not display visual output) surface, or an extension of a touch-sensitive surface formed by a touch screen), etc.

The display unit 640 may be used to display information input by the user or information provided to the user and various menu interfaces of the terminal. The display unit 640 may include a display panel 6401 . The display panel 8401 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an organic light-emitting diode (Organic Light-Emitting Diode, OLED), etc. to configure the display panel 6401 .

It should be noted that the touch panel 6301 can cover the display panel 6401 to form a touch screen. When the touch screen detects a touch operation on or near it, it is sent to the processor 660 to determine the type of the touch event, and then the touch screen is processed. The controller 660 provides corresponding visual output on the touch screen according to the type of touch event.

The touch screen includes an application program interface display area and a display area for commonly used controls. The arrangement of the application program interface display area and the common control display area is not limited, and may be an arrangement that can distinguish the two display areas, such as up-down arrangement, left-right arrangement, or the like. The application program interface display area can be used to display the interface of the application program. Each interface may contain at least one application icon and/or interface elements such as widget desktop controls. The application program interface display area can also be an empty interface that does not contain any content. The commonly used control display area is used to display controls with high usage rates, such as setting buttons, interface numbers, scroll bars, phonebook icons and other application icons.

The RF circuit 610 can be used for receiving and sending signals during sending and receiving information or during a call. In particular, after receiving the downlink information from the network side, it is processed by the processor 660; in addition, it sends the design uplink data to the network side. Typically, the RF circuit 610 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuit 610 can also communicate with the network and other devices through wireless communication. The wireless communication can use any communication standard or protocol, including but not limited to Global System of Mobile Communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (Code Division Multiple Access) Access, CDMA), Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA), Long Term Evolution (Long Term Evolution, LTE), email, Short Messaging Service (Short Messaging Service, SMS) and the like.

The memory 620 is used for storing software programs and modules, and the processor 660 executes various functional applications and data processing of the terminal by running the software programs and modules stored in the memory 620 . The memory 620 may mainly include a stored program area and a stored data area, wherein the stored program area can store an operating system, an application program (such as a sound playback function, an image playback function, etc.) required for at least one function; Store data created according to the use of the terminal (such as audio data, phone book, etc.) and the like. In addition, the memory 620 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk memory, flash memory device, or other volatile solid state memory device.

The processor 660 is the control center of the terminal, using various interfaces and circuits to connect various parts of the entire mobile phone, by running or executing the software programs and/or modules stored in the first memory 6201, and calling the software programs and/or modules stored in the second memory Data in the body 6202, perform various functions of the terminal and process data, so as to monitor the terminal as a whole. Optionally, processor 660 may include one or more processing units.

In the embodiment of the present invention, by calling the software programs and/or modules stored in the first memory 6201 and/or the data in the second memory 6202, the processor 660 is used for:

Generate a first uplink signal for frequency compensation according to the configuration or instruction of the network-side device;

Send the first uplink signal to the network side device, so that the network side device uses one or more first transmission and reception points TRP to receive the first uplink signal sent by the terminal, and uses the first uplink signal to determine at least one first TRP The respective corresponding frequency compensation values, according to the respective corresponding frequency compensation values of the at least one first TRP, determine the respective transmission frequencies of the at least one first TRP used for downlink transmission.

Preferably, as another embodiment, the processor 660 is further configured to: the first uplink signals used by at least one first TRP for frequency offset estimation are the same.

Preferably, as another embodiment, the processor 660 is further configured to: the first uplink signal includes a second uplink signal corresponding to each first TRP and used for frequency offset estimation.

Preferably, as another embodiment, the processor 660 is further configured to: receive the association relationship between the at least one first TRP and the second uplink signal; preferably, the association relationship is indicated by any one of the following messages:

spatial relationship information of the second uplink signal;

The transmission configuration of the second uplink signal indicates the TCI state;

The second uplink signal is quasi-co-located QCL indicating information.

Preferably, as another embodiment, the association relationship indicates a downlink signal associated with the first uplink signal; the processor 660 is further configured to:

receiving a downlink signal associated with the second uplink signal;

Sending the first uplink signal to the network-side device includes:

Based on the reception of the downlink signal, the first uplink signal is sent to the network side device.

The terminal provided in this embodiment of the present invention can implement each process implemented by the terminal in the foregoing embodiments, and to avoid repetition, details are not described herein again.

It can be seen from the above embodiment that the first uplink signal for frequency compensation can be generated according to the configuration or instruction of the network side device, and the first uplink signal is sent to the network side device, so that the network side device can use one or more The first TRP receives the first uplink signal sent by the terminal; the first uplink signal is used to determine the corresponding frequency compensation value of each first TRP; according to the corresponding frequency compensation value of each first TRP, it is determined that each first TRP is used for downlink respectively The transmission frequency of transmission, so that each first TRP can use the frequency-compensated transmission frequency for downlink transmission when performing downlink transmission, thereby realizing frequency compensation for each first TRP when performing downlink transmission, effectively eliminating the need for terminals The Doppler extension on the side also improves the performance of downlink transmission.

FIG. 7 is a schematic structural diagram of a network side device according to an embodiment of the present invention. As shown in FIG. 7 , the network side device 700 may include at least one processor 701, memory 702, at least one other user interface 703, and Transceiver 704. The various components in the network side device 700 are coupled together through a busbar system 705 . It can be understood that the busbar system 705 is used to realize the connection communication between these components. In addition to the data bus, the bus system 705 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, the various busbars are designated as busbar system 705 in FIG. The various circuits of the memory represented by the memory 702 are linked together. The busbar system can also link together various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art, and therefore will not be further described in this embodiment of the present invention . The bus interface provides the interface. Transceiver 704 may be a plurality of elements, ie, including transmitters and receivers, that provide means for communicating with various other devices over a transmission medium. For different user equipments, the user interface 703 may also be an interface capable of externally connecting required devices, and the connected devices include but are not limited to keypads, displays, speakers, microphones, joysticks, and the like.

It can be understood that the memory 702 in the embodiment of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM) ), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache memory. By way of example and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous Dynamic RAM ( Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM). The memory 702 of the systems and methods described in various embodiments of the present invention is intended to include, but not be limited to, these and any other suitable types of memory.

The processor 701 is responsible for managing the bus system and general processing, and the memory 702 can store computer programs or instructions used by the processor 701 to perform operations. Specifically, the processor 701 can be used for:

Utilize one or more first transmission and reception points TRP to receive the first uplink signal sent by the terminal for frequency compensation;

Determine the corresponding frequency compensation value of at least one first TRP by using the first uplink signal;

According to the respective frequency compensation values of the at least one first TRP, the respective transmission frequencies of the at least one first TRP used for downlink transmission are determined.

The methods disclosed in the above embodiments of the present invention may be applied to the processor 701 or implemented by the processor 701 . The processor 701 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method can be completed through the hardware integrated logic circuit in the processor 701 or the instructions in the form of software. The above-mentioned processor 701 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or others. Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present invention may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in random memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in the art. The storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702, and completes the steps of the above method in combination with its hardware.

It will be appreciated that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more Application Specific Integrated Circuits (ASIC), Digital Signal Processing (DSP), Digital Signal Processing Device (DSP Device, DSPD), Programmable Logic Device (PLD), Field-Programmable Gate Array (FPGA), general-purpose processor, controller, microcontroller, microprocessor, and others for performing the function of the present invention electronic unit or a combination thereof.

For software implementation, the technology can be implemented through modules (eg, procedures, functions, etc.) that execute the functions in the embodiments of the present invention. Software codes can be stored in memory and executed by a processor. Memory can be implemented in the processor or external to the processor.

Preferably, the determining the corresponding frequency compensation value of at least one first TRP by using the first uplink signal includes:

The frequency compensation value corresponding to each first TRP is determined by using the first uplink signal. Preferably, the determining the corresponding frequency compensation value of at least one first TRP by using the first uplink signal includes:

Using the first uplink signal to perform frequency offset estimation to obtain a frequency offset estimation result;

Determine the reference point for frequency compensation;

According to the frequency offset estimation result and the reference point, each corresponding frequency compensation value of the at least one first TRP is determined.

Preferably, the frequency offset estimation is performed using the first uplink signal to obtain a frequency offset estimation result, including:

The at least one first TRP performs frequency offset estimation on the first uplink signal, respectively, to obtain respective corresponding frequency offset estimation values.

Preferably, the determining a reference point for frequency compensation includes:

The reference point is determined according to the set rule or the reference point indication information sent by the terminal.

Preferably, the setting rule includes any of the following:

The reference point is the frequency offset estimation value corresponding to the designated first TRP determined by the network side device;

The reference point is the estimated frequency offset with the largest absolute value among the estimated frequency offsets corresponding to each first TRP determined by the network side device;

The reference point is the estimated frequency offset with the smallest absolute value among the estimated frequency offsets corresponding to each first TRP determined by the network side device;

The reference point is the maximum value among the absolute values of the frequency offset estimation values corresponding to each first TRP determined by the network side device;

The reference point is the minimum value among the absolute values of the frequency offset estimation values corresponding to each first TRP determined by the network side device.

Preferably, the reference point indication information includes any of the following:

The reference point indication information is indication information about the designated first TRP; wherein, the frequency offset estimation value corresponding to the designated first TRP is the reference point;

The reference point indication information is indication information about the downlink signal; wherein, the estimated frequency offset corresponding to the first TRP associated with the indication information of the downlink signal is the reference point;

The reference point indication information is indication information about the first uplink signal; wherein, the network-side device uses the estimated frequency offset estimated value of the first uplink signal indicated by the indication information as the reference point.

Preferably, the determining a reference point for frequency compensation includes:

The at least one first TRP determines the reference point according to the frequency offset estimation result; or

The central processing unit connected to the first TRP included in the network-side device determines the reference point according to the frequency offset estimation result.

Preferably, the at least one first TRP determines the reference point according to the frequency offset estimation result, including:

At least one first TRP performs information exchange on its corresponding frequency offset estimation value, and determines its own corresponding reference point for determining frequency compensation according to the information exchanged.

Preferably, the frequency compensation value corresponding to the at least one first TRP is determined according to the frequency offset estimation result and the reference point, including:

The at least one first TRP determines a corresponding frequency compensation value according to the frequency offset estimation result and the reference point; or

The central processing unit connected to the first TRP included in the network-side device determines the respective frequency compensation values of the at least one first TRP according to the frequency offset estimation result and the reference point.

Preferably, the at least one first TRP determines the corresponding frequency compensation value according to the frequency offset estimation result and the reference point, including:

The at least one first TRP determines a frequency compensation value corresponding to itself according to the estimated frequency offset value corresponding to itself and the reference point.

Preferably, the frequency compensation value corresponding to the at least one first TRP is determined according to the frequency offset estimation result and the reference point, including:

The second TRP determines the frequency compensation value corresponding to itself according to the frequency offset estimated value corresponding to itself, and sends the determined frequency compensation value or the frequency offset estimated value corresponding to the second TRP to the third TRP; wherein the second TRP Used to characterize a part of TRPs in the first TRP, and the third TRP is used to characterize another part of TRPs in the first TRP.

Preferably, determining the respective transmission frequencies of the at least one first TRP for downlink transmission according to the corresponding frequency compensation values of the at least one first TRP, including:

The second TRP determines its own transmission frequency for downlink transmission according to the frequency compensation value determined by itself;

The third TRP determines its own transmission frequency for downlink transmission according to the frequency compensation value determined by the second TRP or the frequency offset estimation value corresponding to the second TRP.

Preferably, the determining the corresponding frequency compensation value of at least one first TRP by using the first uplink signal includes:

The at least one first TRP uses the first uplink signal to determine a corresponding frequency compensation value; or

The central processing unit connected to the first TRP included in the network-side device uses the first uplink signal to determine the corresponding frequency compensation value of the at least one first TRP.

Preferably, the at least one first TRP uses the first uplink signal to determine the corresponding frequency compensation value, including:

The at least one first TRP respectively performs frequency offset estimation on the first uplink signal to obtain respective corresponding frequency offset estimation values;

The at least one first TRP determines a corresponding frequency compensation value according to the corresponding frequency offset estimation value.

Preferably, the first uplink signal includes a second uplink signal corresponding to each first TRP for performing frequency offset estimation;

The at least one first TRP performs frequency offset estimation on the first uplink signal, respectively, to obtain respective corresponding frequency offset estimation values, including:

The at least one first TRP performs frequency offset estimation on the respective corresponding second uplink signals to obtain respective corresponding frequency offset estimation values.

Preferably, it also includes:

The association relationship between the at least one first TRP and the second uplink signal is sent to the terminal.

Preferably, it also includes: the association relationship is indicated by any one of the following messages:

spatial relationship information of the second uplink signal;

The transmission configuration of the second uplink signal indicates the TCI state;

The second uplink signal is quasi-co-located QCL indicating information.

The network-side device provided in the embodiment of the present invention can implement each process implemented by the network-side device in the foregoing embodiments, and to avoid repetition, details are not described herein again.

It can be seen from the above-mentioned embodiments that by using one or a plurality of first TRPs to receive the first uplink signal sent by the terminal for frequency compensation, and using the first uplink signal to determine the frequency compensation value corresponding to at least one first TRP, according to the at least one The frequency compensation value corresponding to each of the first TRPs is used to determine the respective transmission frequencies of the at least one first TRP used for downlink transmission, so that when the at least one first TRP performs downlink transmission, the frequency-compensated transmission frequency can be used for downlink transmission, Therefore, frequency compensation for each first TRP during downlink transmission is realized, Doppler spread on the terminal side is effectively eliminated, and the performance of downlink transmission is also improved.

The foregoing mainly introduces the solutions provided by the embodiments of the present invention from the perspective of network-side devices. It can be understood that, in order to implement the above-mentioned functions, the network-side device provided in the embodiment of the present invention includes a corresponding hardware structure and/or software module for executing each function. Those with ordinary knowledge in the art should easily realize that the present invention can be implemented in hardware or a combination of hardware and computer software in conjunction with the units and algorithm steps of each example described in the embodiments disclosed in the present invention.

Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

In this embodiment of the present invention, network-side devices and the like may be divided into functional modules according to the foregoing method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. middle. The above-mentioned integrated modules can be implemented in the form of hardware, or can be implemented in the form of software function modules.

It should be noted that the division of modules in the embodiments of the present invention is schematic, and is only a logical function division, and other division methods may be used in actual implementation.

Those with ordinary knowledge in the field can clearly understand that for the convenience and conciseness of the description, only the division of the above functional modules is used for illustration. In practical applications, the above functions can be allocated by different functional modules according to needs. Group completion means dividing the internal structure of the device into different functional modules to complete all or part of the functions described above. For the specific working process of the system, apparatus and unit described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, a plurality of units or components may be combined. Either it can be integrated into another system, or some features can be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units.

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

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, all or part of the technical solution can be embodied in the form of a computer software product, which is stored in a storage medium and contains a number of instructions to enable a computer device (which may be a personal computer, a server , or a network device, etc.) or a processor to execute all or part of the steps of the method in each embodiment of the present invention. The computer storage medium is a non-transitory (English: nontransitory) medium, including: flash memory, mobile hard disk, read-only memory, random access memory, magnetic disk or CD, etc. medium.

On the other hand, an embodiment of the present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored, and the computer program is implemented by a processor to execute the methods provided by the above embodiments, including:

Utilize one or more first transmission and reception points TRP to receive the first uplink signal sent by the terminal for frequency compensation;

Determine the corresponding frequency compensation value of at least one first TRP by using the first uplink signal;

According to the corresponding frequency compensation value of the at least one first TRP, the respective transmission frequencies of the at least one first TRP used for downlink transmission are determined.

On the other hand, an embodiment of the present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored, and the computer program is implemented by a processor to execute the methods provided by the above embodiments, including:

Generate a first uplink signal for frequency compensation according to the configuration or instruction of the network-side device;

Send the first uplink signal to the network side device, so that the network side device uses one or more first transmission and reception points TRP to receive the first uplink signal sent by the terminal, and uses the first uplink signal to determine at least one first TRP The respective corresponding frequency compensation values, according to the respective corresponding frequency compensation values of the at least one first TRP, determine the respective transmission frequencies of the at least one first TRP used for downlink transmission.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those with ordinary knowledge in the art should understand that: It is still possible to make modifications to the technical solutions recorded in the foregoing embodiments, or to perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and spirit of the technical solutions of the embodiments of the present invention. scope.

110, 120, 130, 210, 220: Steps 31: Receive module 32: Frequency compensation determination module 33: Transmission frequency determination module 41: Generate Mods 42: Send module 500: Terminal 501: Processor 502: memory 5021: Operating System 5022: Application 503: User Interface 504: network interface 505: Busbar system 610: RF Circuits 620: Memory 6201: first memory 6202: Second memory 630: Input unit 6301: Touch Panel 6302: Input device 640: Display unit 6401: Display panel 660: Processor 670: Audio Circuits 680: WiFi module 690: Power 700: Network side equipment 701: Processor 702: Memory 703: User Interface 704: Transceiver 705: Busbar System

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are the For some embodiments of the invention, for those with ordinary knowledge in the art, other drawings can also be obtained from these drawings without any creative effort. 1 is a flowchart of a frequency compensation method according to an embodiment of the present invention; 2 is a flowchart of a frequency compensation method provided by an embodiment of the present invention; 3 is a block diagram of a module of a frequency compensation device provided by an embodiment of the present invention; 4 is a block diagram of a module of a frequency compensation device provided by an embodiment of the present invention; FIG. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention; FIG. 6 is a schematic structural diagram of another terminal provided by an embodiment of the present invention; FIG. 7 is a schematic structural diagram of a network side device according to an embodiment of the present invention.

110, 120, 130: Steps

Claims (19)

A frequency compensation method, which is used for network side equipment, comprising: using one or more first transmission receiving points to receive a first uplink signal sent by a terminal for frequency compensation; using the first uplink signal to determine at least one first transmission The frequency compensation value corresponding to each receiving point; according to the corresponding frequency compensation value of the at least one first transmission receiving point, determine the transmission frequency used by the at least one first transmission receiving point for downlink transmission respectively; wherein, using the first uplink The step of determining the corresponding frequency compensation value of at least one first transmission and receiving point of the signal includes: using the first uplink signal to perform frequency offset estimation to obtain a frequency offset estimation result; determining a reference point for frequency compensation; The frequency offset estimation result and the reference point determine the respective frequency compensation values corresponding to the at least one first transmission and reception point. The frequency compensation method according to claim 1, wherein the step of using the first uplink signal to determine the frequency compensation value corresponding to each of the at least one first transmission and reception point comprises: using the first uplink signal to determine each of the first transmission and reception points point the corresponding frequency compensation value. The frequency compensation method according to claim 1, wherein the step of using the first uplink signal to perform frequency offset estimation to obtain a frequency offset estimation result includes: The at least one first transmission and reception point respectively performs frequency offset estimation on the first uplink signal to obtain respective corresponding frequency offset estimation values. The frequency compensation method according to claim 1, wherein the step of determining a reference point for frequency compensation includes at least one of the following: determining the reference point according to a setting rule or reference point indication information sent by the terminal; the at least one of the following: A first transmission and reception point determines the reference point according to the frequency offset estimation result; the central processing unit connected to the first transmission and reception point included in the network side device determines the reference point according to the frequency offset estimation result. The frequency compensation method according to claim 4, wherein the step of setting a rule includes any one of the following: the reference point is a frequency offset estimation value corresponding to the designated first transmission and reception point determined by the network-side device; the reference point is the frequency offset estimate with the largest absolute value among the frequency offset estimates corresponding to each first transmission and reception point determined by the network side device; the reference point is the frequency offset estimate corresponding to each first transmission and reception point determined by the network side device The frequency offset estimated value with the smallest absolute value among the values; the reference point is the maximum value among the absolute values of the frequency offset estimated values corresponding to each first transmission and reception point determined by the network-side device; the reference point is determined by the network-side device The minimum value among the absolute values of the frequency offset estimates corresponding to each first transmission and reception point of ; the reference point indication information includes any of the following: The reference point indication information is the indication information about the designated first transmission and reception point; wherein, the frequency offset estimation value corresponding to the designated first transmission and reception point is the reference point; the reference point indication information is the indication of the downlink signal information; wherein, the estimated frequency offset corresponding to the first transmission and reception point associated with the indication information of the downlink signal is the reference point; the reference point indication information is the indication information about the first uplink signal; wherein, the network side The device uses the estimated frequency offset estimated value of the first uplink signal indicated by the indication information as the reference point. The frequency compensation method according to claim 4, wherein the step of determining the reference point by the at least one first transmission and reception point according to the frequency offset estimation result comprises: at least one first transmission and reception point pair the respective corresponding frequency offset estimation values Perform information exchange, and determine its own corresponding reference point for frequency compensation according to the information exchanged. The frequency compensation method according to any one of claim 1 to claim 4, wherein, according to the frequency offset estimation result and the reference point, the step of determining the frequency compensation value corresponding to each of the at least one first transmission and reception point , including: the at least one first transmission and reception point determines the corresponding frequency compensation value according to the frequency offset estimation result and the reference point; or the central processing unit connected to the first transmission and reception point included in the network side device according to the The frequency offset estimation result and the reference point determine the respective frequency compensation values corresponding to the at least one first transmission and reception point. The frequency compensation method according to claim 7, wherein at least one of the first transmission The step of determining the corresponding frequency compensation value at the transmission and reception point according to the frequency offset estimation result and the reference point, comprising: the at least one first transmission and reception point determines the corresponding frequency offset value according to the frequency offset estimation value corresponding to itself and the reference point. frequency compensation value. The frequency compensation method according to claim 1, wherein, according to the frequency offset estimation result and the reference point, the step of determining the frequency compensation value corresponding to each of the at least one first transmission and reception point comprises: the second transmission and reception point according to The frequency offset estimation value corresponding to itself, determine the frequency compensation value corresponding to itself, and send the determined frequency compensation value or the frequency offset estimation value corresponding to the second transmission and reception point to the third transmission and reception point; wherein, the second transmission and reception point The transmission and reception points are used to represent a part of the first transmission and reception points, and the third transmission and reception points are used to represent another part of the transmission and reception points of the first transmission and reception points. The frequency compensation method according to claim 9, wherein the step of determining the respective transmission frequencies used by the at least one first transmission and reception point for downlink transmission according to the respective frequency compensation values of the at least one first transmission and reception point, comprising: : The second transmission and reception point determines its own transmission frequency for downlink transmission according to the frequency compensation value determined by itself; the third transmission and reception point determines the frequency compensation value or the second transmission frequency according to the frequency compensation value determined by the second transmission and reception point. The estimated frequency offset corresponding to the receiving point determines the transmission frequency used by itself for downlink transmission. The frequency compensation method according to any one of claim 1 to claim 4, wherein at least one first transmission receiving point is determined by using the first uplink signal The steps of the respective corresponding frequency compensation values include: the at least one first transmission and reception point uses the first uplink signal to determine the respective corresponding frequency compensation values; The unit uses the first uplink signal to determine the corresponding frequency compensation value of the at least one first transmission and reception point. The frequency compensation method according to claim 11, wherein the step of determining the respective corresponding frequency compensation values by the at least one first transmission and reception point using the first uplink signal comprises: the at least one first transmission and reception point is the first transmission and reception point The uplink signals are respectively subjected to frequency offset estimation to obtain respective corresponding frequency offset estimated values; the at least one first transmission and reception point determines respective corresponding frequency compensation values according to the respective corresponding frequency offset estimated values. The frequency compensation method according to claim 12, wherein the first uplink signal includes a second uplink signal corresponding to each first transmission and reception point for performing frequency offset estimation; at least one first transmission and reception point The steps of respectively performing frequency offset estimation on the first uplink signals to obtain respective corresponding frequency offset estimated values include: the at least one first transmission and reception point performs frequency offset estimation on the corresponding second uplink signals respectively, and obtains the respective corresponding frequency offset estimation values. Frequency offset estimate. A frequency compensation method, which is used for a terminal, comprising: generating a first uplink signal for frequency compensation according to a configuration or an instruction of a network side device; Send the first uplink signal to the network-side device, so that the network-side device uses one or more first transmission and reception points to transmit and receive the first uplink signal sent by the terminal, and uses the first uplink signal to determine at least one first uplink signal. A frequency compensation value corresponding to each transmission and reception point, according to the corresponding frequency compensation value of the at least one first transmission and reception point, determine the transmission frequency of the at least one first transmission and reception point for downlink transmission; wherein, using the first transmission and reception point The step of determining a frequency compensation value corresponding to at least one first transmission and reception point for an uplink signal includes: using the first uplink signal to perform frequency offset estimation to obtain a frequency offset estimation result; determining a reference point for frequency compensation; According to the frequency offset estimation result and the reference point, each corresponding frequency compensation value of the at least one first transmission and reception point is determined. The frequency compensation method of claim 14, wherein the first uplink signals used by the at least one first transmission and reception point for frequency offset estimation are the same. The frequency compensation method according to claim 14, wherein the first uplink signal includes second uplink signals corresponding to each of the first transmission and reception points for performing frequency offset estimation. The frequency compensation method of claim 16, further comprising: receiving an association relationship between the at least one first transmission receiving point and the second uplink signal; the association relationship indicates a downlink associated with the first uplink signal signal; The frequency compensation method further includes: receiving a downlink signal associated with the second uplink signal; the step of sending the first uplink signal to a network side device includes: based on receiving the downlink signal, sending the first uplink signal to the network side device. A network side device includes a memory, a processor, and a program stored in the memory and running on the processor, wherein the network side device includes a plurality of remote radio head transmission and reception points, and the processor executes the During the program, the following steps are implemented: use one or more first transmission and reception points to transmit the first uplink signal sent by the reception point and receive the terminal for frequency compensation; use the first uplink signal to determine the corresponding corresponding at least one first transmission and reception point. frequency compensation value; according to the corresponding frequency compensation value of the at least one first transmission and reception point, determine the transmission frequency used by the at least one first transmission and reception point for downlink transmission; wherein, the at least one first transmission frequency is determined by using the first uplink signal A step of transmitting the frequency compensation value corresponding to each receiving point includes: using the first uplink signal to perform frequency offset estimation to obtain a frequency offset estimation result; determining a reference point for frequency compensation; according to the frequency offset estimation result and The reference point determines the corresponding frequency compensation value of the at least one first transmission and reception point. A terminal, comprising a memory, a processor and a program stored in the memory and running on the processor, wherein the processor implements the following steps when executing the program: according to the configuration or instruction of a network side device, generate The first uplink signal of frequency compensation; send the first uplink signal to the network side equipment, so that the network side equipment uses one or more first transmission and reception points to transmit the first uplink signal sent by the reception point, and use the The first uplink signal determines the corresponding frequency compensation value of at least one first transmission and reception point, and determines the corresponding frequency compensation value of the at least one first transmission and reception point for downlink transmission according to the corresponding frequency compensation value of the at least one first transmission and reception point. transmission frequency; wherein, the step of using the first uplink signal to determine the corresponding frequency compensation value of at least one first transmission receiving point includes: using the first uplink signal to perform frequency offset estimation to obtain a frequency offset estimation result; at a reference point for frequency compensation; according to the frequency offset estimation result and the reference point, determine the frequency compensation value corresponding to each of the at least one first transmission and reception point.

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