CN113364714A

CN113364714A - Frequency compensation method, device, network side equipment, terminal and storage medium

Info

Publication number: CN113364714A
Application number: CN202010147582.1A
Authority: CN
Inventors: 黄秋萍; 卢艺文; 苏昕; 高秋彬
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2021-09-07
Anticipated expiration: 2040-03-05
Also published as: WO2021175146A1; CN113364714B; TWI758112B; TW202135566A

Abstract

The embodiment of the invention provides a frequency compensation method, a frequency compensation device, network side equipment, a terminal and a storage medium, wherein the method comprises the following steps: receiving a first uplink signal for frequency compensation transmitted by a terminal by using one or more first TRPs; determining a frequency compensation value corresponding to each first TRP by using the first uplink signal; and determining the transmission frequency of each first TRP for downlink transmission according to the frequency compensation value corresponding to each first TRP. Therefore, the embodiment of the invention realizes the frequency compensation aiming at each first TRP during the downlink transmission, effectively eliminates the Doppler spread at the terminal side and also improves the performance of the downlink transmission.

Description

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

Technical Field

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

Background

Multipoint coordination is an important technical means in wireless communication systems. The distributed transmission is carried out through a plurality of distributed transmission points, so that the coverage of the cell edge can be improved, and the time delay and signaling overhead brought by handover are reduced.

At present, in a High-Speed rail scene, in order to avoid frequent cell switching by a terminal, a deployment mode of an SFN (Single Frequency Network), which is referred to as an HST-SFN (High Speed Train-Single Frequency Network) scene for short, is generally adopted. A typical transmission scheme in an HST-SFN scenario is to transmit downlink signals from all RRHs (Remote Radio heads) connected to a BBU (Base Band Unit) at the same time. However, doppler shifts that may occur in signals from a plurality of RRHs form doppler spreads, and since the train moves at a high speed, the range of change in the doppler shift may be large, which may result in poor demodulation of the downlink signal by the terminal.

Disclosure of Invention

The embodiment of the invention provides a frequency compensation method, a frequency compensation device, network side equipment and a terminal, aiming at the problem that a terminal cannot demodulate a downlink signal well due to Doppler frequency shift generated by signals from a plurality of RRHs in an HST-SFN scene.

The embodiment of the invention provides a frequency compensation method, which is used for network side equipment and comprises the following steps:

receiving a first uplink signal for frequency compensation sent by a terminal by using one or more first Transmission Receiving Points (TRP);

determining a frequency compensation value corresponding to each first TRP by using the first uplink signal;

and determining the transmission frequency of each first TRP for downlink transmission according to the frequency compensation value corresponding to each first TRP.

Optionally, the determining, by using the first uplink signal, a frequency compensation value corresponding to each first TRP includes:

performing frequency offset estimation by using the first uplink signal to obtain a frequency offset estimation result;

determining a reference point for frequency compensation according to the frequency offset estimation result;

and determining a frequency compensation value corresponding to each first TRP according to the frequency offset estimation result and the reference point.

Optionally, the performing, by using the first uplink signal, frequency offset estimation to obtain a frequency offset estimation result includes:

and each first TRP carries out frequency offset estimation on the first uplink signal respectively to obtain respective corresponding frequency offset estimation values.

Optionally, determining a reference point for frequency compensation according to the frequency offset estimation result includes:

and determining the reference point according to a set rule or reference point indication information sent by the terminal.

Optionally, the setting rule includes any one of:

the reference point is a frequency offset estimation value corresponding to a specified first TRP determined by the network side equipment;

the reference point is a frequency offset estimation value corresponding to the maximum value of the absolute values in the frequency offset estimation values corresponding to the first TRPs determined by the network side equipment;

the reference point is a frequency offset estimation value corresponding to the minimum value of absolute values in the frequency offset estimation values corresponding to the first TRPs determined by the network side equipment;

the reference point is the maximum value in the absolute values of the frequency offset estimation values corresponding to the first TRPs determined by the network side equipment;

the reference point is the minimum value in the absolute values of the frequency offset estimation values corresponding to the first TRPs determined by the network side equipment.

Optionally, the reference point indication information includes any one of:

the reference point indication information is indication information on a specified first TRP; wherein, the frequency offset estimation value corresponding to the appointed first TRP is the reference point;

the reference point indication information is indication information about a downlink signal; the frequency offset estimation value 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; and the network side equipment uses the frequency offset estimation value estimated by the first uplink signal indicated by the indication information as the reference point.

Optionally, the determining a reference point for frequency compensation according to the frequency offset estimation result includes:

the reference points are determined by the first TRPs according to the frequency offset estimation result; or

And the central processing unit connected with the first TRP and arranged in the network side equipment determines the reference point according to the frequency offset estimation result.

Optionally, the determining, by the respective first TRPs, the reference point according to the frequency offset estimation result includes:

and each first TRP carries out information interaction on the frequency offset estimation value corresponding to each first TRP, and determines a reference point corresponding to the first TRP for determining frequency compensation according to the information of the information interaction.

Optionally, the determining, according to the frequency offset estimation result and the reference point, a frequency compensation value corresponding to each first TRP includes:

determining a frequency compensation value corresponding to each first TRP by each first TRP according to the frequency offset estimation result and the reference point; or

And the central processing unit connected with the first TRP and arranged in the network side equipment determines the frequency compensation value corresponding to each first TRP according to the frequency offset estimation result and the reference point.

Optionally, determining, by the first TRPs according to the frequency offset estimation result and the reference point, a frequency compensation value corresponding to each first TRP, including:

and each first TRP determines a frequency compensation value corresponding to itself according to the frequency offset estimation value corresponding to itself and the reference point.

the second TRP determines a frequency compensation value corresponding to the second TRP according to the frequency offset estimation value corresponding to the second TRP, and sends the determined frequency compensation value or the frequency offset estimation value corresponding to the second TRP to a third TRP; wherein the second TRP is used for characterizing one part of TRP in each first TRP, and the third TRP is used for characterizing the other part of TRP in each first TRP.

Optionally, the determining, according to the frequency offset value corresponding to each first TRP, a transmission frequency used by each first TRP for downlink transmission includes:

the second TRP determines the transmission frequency for downlink transmission according to the frequency compensation value determined by the second TRP;

and the third TRP determines the transmission frequency used 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.

the first TRPs utilize the first uplink signals to determine respective frequency compensation values corresponding to the first TRPs; or

And the central processing unit connected with the first TRP and included in the network side equipment determines the frequency compensation value corresponding to each first TRP by using the first uplink signal.

Optionally, the determining, by the first TRPs, frequency compensation values corresponding to the first TRPs by using the first uplink signals includes:

each first TRP respectively carries out frequency offset estimation on the first uplink signal to obtain respective corresponding frequency offset estimation values;

and each first TRP determines a corresponding frequency compensation value according to the corresponding frequency offset estimation value.

Optionally, the first uplink signal includes a second uplink signal for performing frequency offset estimation, which corresponds to each first TRP;

the frequency offset estimation of each first TRP on the first uplink signal is performed, so as to obtain respective corresponding frequency offset estimation values, including:

and each first TRP respectively carries out frequency offset estimation on the corresponding second uplink signal to obtain a corresponding frequency offset estimation value.

Optionally, the method further comprises:

sending the association relation between each first TRP and the second uplink signal to a terminal;

optionally, 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 a TCI state;

and the second uplink signal quasi-co-location QCL indication information.

The embodiment of the invention provides a frequency compensation method, which is used for a terminal and comprises the following steps:

generating a first uplink signal for frequency compensation according to the configuration or the indication of the network side equipment;

sending the first uplink signal to network side equipment so that the network side equipment receives the first uplink signal sent by a terminal by using one or more first Transmission Receiving Points (TRP); determining a frequency compensation value corresponding to each first TRP by using the first uplink signal; and determining the transmission frequency of each first TRP for downlink transmission according to the frequency compensation value corresponding to each first TRP.

Optionally, the first uplink signals, used for frequency offset estimation, of the respective first TRPs are the same.

Optionally, the first uplink signal includes a second uplink signal for performing frequency offset estimation, which corresponds to each first TRP.

Optionally, the method further comprises:

receiving the association relation between each first TRP and the second uplink signal; optionally, the association relationship is indicated by any one of the following messages:

spatial relationship information of the second uplink signal;

and the second uplink signal quasi-co-location QCL indication information.

Optionally, a downlink signal associated with the first uplink signal is indicated in the association relationship; the frequency compensation method further includes:

receiving a downlink signal associated with the second uplink signal;

the sending the first uplink signal to a network side device includes:

and sending the first uplink signal to the network side equipment based on the reception of the downlink signal.

The embodiment of the invention provides a frequency compensation device, which is used for network side equipment and comprises:

the receiving module is used for receiving a first uplink signal which is sent by a terminal and used for frequency compensation by utilizing one or more first Transmission Receiving Points (TRP);

a frequency compensation determining module, configured to determine a frequency compensation value corresponding to each first TRP by using the first uplink signal;

and the transmission frequency determining module is used for determining the transmission frequency of each first TRP for downlink transmission according to the frequency compensation value corresponding to each first TRP.

An embodiment of the present invention provides a frequency compensation apparatus, where the frequency compensation apparatus is used for a terminal, and includes:

the generating module is used for generating a first uplink signal for frequency compensation according to the configuration or the indication of the network side equipment;

a sending module, configured to send the first uplink signal to a network side device, so that the network side device receives, by using one or more first transmission and reception points TRP, a first uplink signal sent by a terminal, determines, by using the first uplink signal, a frequency offset value corresponding to each first TRP, and determines, according to the frequency offset value corresponding to each first TRP, a transmission frequency used by each first TRP for downlink transmission.

The embodiment of the invention provides a network side device, which comprises a memory, a processor and a program which is stored on the memory and can be operated on the processor, wherein the network side device comprises a plurality of radio remote heads TRP, and the processor executes the program to realize the following steps:

determining a reference point for determining the frequency compensation value;

Optionally, the method further comprises:

sending the association relation between each first TRP and the second uplink signal to a terminal; optionally, the association relationship is indicated by any one of the following messages:

spatial relationship information of the second uplink signal;

and the second uplink signal quasi-co-location QCL indication information.

The embodiment of the invention provides a terminal, which comprises a memory, a processor and a program which is stored on the memory and can be run on the processor, wherein the processor executes the program and realizes the following steps:

and sending the first uplink signal to network side equipment, so that the network side equipment receives the first uplink signal sent by a terminal by using one or more first Transmission Receiving Points (TRP), determines a frequency compensation value corresponding to each first TRP by using the first uplink signal, and determines a transmission frequency used for downlink transmission of each first TRP according to the frequency compensation value corresponding to each first TRP.

Optionally, the method further comprises:

spatial relationship information of the second uplink signal;

and the second uplink signal quasi-co-location QCL indication information.

receiving a downlink signal associated with the second uplink signal;

the sending the first uplink signal to a network side device includes:

An embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of the frequency compensation method for a network-side device.

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

According to the frequency compensation method, the frequency compensation device, the network side equipment, the terminal and the storage medium provided by the embodiment of the invention, the first uplink signal which is sent by the terminal and used for frequency compensation is received by using one or more first TRPs, the frequency compensation value which corresponds to each first TRP is determined by using the first uplink signal, and the transmission frequency which is used for downlink transmission of each first TRP is determined according to the frequency compensation value which corresponds to each first TRP, so that when each first TRP carries out downlink transmission, the transmission frequency after frequency compensation can be used for carrying out downlink transmission, the frequency compensation of each first TRP during downlink transmission is realized, the Doppler spread at the terminal side is effectively eliminated, and the performance of downlink transmission is also improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a flowchart of a frequency compensation method according to an embodiment of the present invention;

fig. 2 is a flowchart of a frequency compensation method according to an embodiment of the present invention;

fig. 3 is a block diagram of a frequency compensation apparatus according to an embodiment of the present invention;

fig. 4 is a block diagram of a frequency compensation apparatus according to 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 according to 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.

Detailed Description

In order to make the objects, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

For the convenience of clearly describing 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 items or similar items with basically the same functions and actions, those skilled in the art can understand that the words such as "first" and "second" do not limit the quantity and execution order.

At present, in a high-speed rail scene, in order to avoid frequent cell switching of a terminal, an SFN deployment mode, which is referred to as an HST-SFN scene for short, is generally adopted. In the HST-SFN scenario, a typical transmission scheme is to send downlink signals from all RRHs connected to a BBU at the same time. However, it is possible that signals from multiple RRHs may experience different doppler shifts (e.g., a doppler shift from one or some RRHs being positive and a doppler shift from another or some RRHs being negative), thereby producing a doppler spread that includes positive and negative doppler shifts. In addition, since the train moves at a high speed, the range of variation of the doppler shift may be large, which may result in that the terminal may not demodulate the downlink signal well.

In view of the foregoing problems, embodiments of the present invention provide a frequency compensation method, an apparatus, a network side device, and a terminal, which are used to eliminate doppler spread experienced by a downlink signal.

The frequency compensation method, the frequency compensation device, the network side equipment, the terminal and the storage medium provided by the embodiment of the invention can be applied to a wireless communication system or a wireless and wired combined system. Including but not limited to 5G systems (e.g., NR systems), 6G systems, satellite systems, car networking systems, Long Term Evolution (LTE) systems, and subsequent Evolution communication systems of the above systems.

The network side device provided by the embodiment of the present invention may include, but is not limited to, one or more of the following: generally, a base station, an evolved node base (eNB), a network side device in a 5G system (e.g., a next generation base station (gNB), a Transmission and Reception Point (TRP)), and other devices are used.

The terminal provided by the embodiment of the invention can be called as user equipment and the like. The terminal includes but is not limited to handheld devices and vehicle-mounted devices. For example, the Mobile phone may be a Mobile phone, a tablet pc, a notebook pc, an Ultra-Mobile Personal Computer (UMPC), a netbook, a Personal Digital Assistant (PDA), or the like.

The following description will be made by way of specific examples.

Fig. 1 is a flowchart of a frequency compensation method according to an embodiment of the present invention, where the frequency compensation method may be used in a network device, for example: the network side device may include a central processing unit, a TRP (Transmission Reception Point), and the like, and the configuration or the indication of the network side device may be performed by the central processing unit or by the TRP; as shown in fig. 1, the method comprises the steps of:

step 110: and receiving the first uplink signal for frequency compensation transmitted by the terminal by using one or more first TRPs.

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

Each of the first TRPs performs reception of a first uplink signal for frequency compensation transmitted by the terminal.

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

In addition, the TRP in the embodiment of the present invention may be an antenna element group, an RRH, or the like of the network side device.

Step 120: and determining a frequency compensation value corresponding to each first TRP by using the first uplink signal.

Specifically, each first TRP determines its corresponding frequency offset value using the first uplink signal.

When the first TRPs are divided into one or more TRP groups, when determining the frequency offset value corresponding to each first TRP by using the first uplink signal, determining the frequency offset value corresponding to each first TRP group may include determining the frequency offset value for each TRP group, and further determining the frequency offset value corresponding to each first TRP.

For all the first TRPs in each TRP group, the corresponding frequency offset values may be the same, and are all the frequency offset values corresponding to the TRP group. For example, when any one TRP group uses a first TRP in the TRP group to receive a first uplink signal, a frequency offset value corresponding to the TRP group may be determined using the first uplink signal, and the frequency offset value may be used as a frequency offset value corresponding to each first TRP in the TRP group. Thus, the frequency compensation values corresponding to the plurality of TRP groups are determined, and the frequency compensation value corresponding to each first TRP can be further determined.

In addition, when the frequency compensation value corresponding to each first TRP is determined using the first uplink signal, the frequency compensation value corresponding to each first TRP may be determined based on the doppler spectrum of the first uplink signal, or the frequency compensation value corresponding to each first TRP may be determined based on a frequency offset estimation value (e.g., a doppler shift estimation value) of the first uplink signal.

Step 130: and determining the transmission frequency of each first TRP for downlink transmission according to the frequency compensation value corresponding to each first TRP.

Specifically, when performing downlink transmission, each first TRP may use a transmission frequency after frequency compensation, so that a downlink doppler shift received by a terminal from each first TRP may be controlled within a smaller difference range (i.e., doppler spread is eliminated), thereby reducing an error of channel estimation and improving performance of downlink transmission.

As can be seen from the foregoing embodiments, first uplink signals for frequency compensation sent by one or more first TRPs are received, frequency compensation values corresponding to the first TRPs are determined by the first uplink signals, and transmission frequencies used for downlink transmission of the first TRPs are determined according to the frequency compensation values corresponding to the first TRPs, so that when downlink transmission of the first TRPs is performed, downlink transmission can be performed by using the transmission frequencies after frequency compensation, thereby implementing frequency compensation for the first TRPs during downlink transmission, effectively eliminating doppler spread at a terminal side, and further improving performance of downlink transmission.

Further, based on the above method, the determining, in step 120, the frequency compensation value corresponding to each first TRP by using the first uplink signal may adopt, but is not limited to, the following implementation manners:

and (1-1-1) carrying out frequency offset estimation by using the first uplink signal to obtain a frequency offset estimation result.

Optionally, frequency offset estimation may be performed on the first uplink signal corresponding to each first TRP, so as to obtain a frequency offset estimation value corresponding to each first TRP.

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

Optionally, when each first TRP is divided into one or more TRP groups, frequency offset estimation may be performed on a first uplink signal corresponding to one first TRP in each TRP group to obtain a frequency offset estimation value corresponding to the TRP group. Optionally, the frequency offset estimation value corresponding to the TRP group where any first TRP is located is further taken as the frequency offset estimation value corresponding to the first TRP.

(1-1-2) determining a reference point for frequency compensation according to the frequency offset estimation result

Specifically, each first TRP determines a frequency compensation value based on the same reference point, which can ensure that the compensated doppler received by the terminal is almost the same. For example, the difference between the respective first TRP frequency compensation values is equal to their single-pass doppler difference.

Alternatively, the reference points corresponding to the first TRPs may be the same reference point.

Alternatively, when the first TRPs are divided into one or more TRP groups, the reference points corresponding to the TRP groups may be the same reference point.

(1-1-3) determining respective frequency compensation values corresponding to the first TRPs according to the frequency offset estimation result and the reference point.

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

Such as: reference point f_rThe estimated frequency offset value of the nth first TRP is f_nThen the frequency compensation value of the nth first TRP is f_r-f_n. Suppose that the nth first TRP should be at frequency f_xSending downlinkThe signal needs to be adjusted to be at the frequency f_x+f_r-f_nAnd sending the downlink signal.

Where the reference point may be 0. At this time, if the estimated frequency offset value of the nth first TRP is f_nThen, the frequency offset value of the nth first TRP is-fn. Suppose that the nth first TRP should be at frequency f_xFor transmitting downlink signals, it needs to be adjusted to be at frequency f_x-f_nAnd sending the downlink signal.

By the adjustment of the above embodiment, when the reference point is f_rWhen the frequency of the downlink signal received by the terminal from any one first TRP is f, the frequency of the downlink signal is f_x+f_yIn the vicinity of, wherein f_yIs the difference between the frequency offset value of any one first TRP and the Doppler shift from the first TRP to the terminal.

As can be seen from the foregoing embodiments, the first uplink signal may be utilized to perform frequency offset estimation to obtain a frequency offset estimation result, determine a reference point for determining the frequency compensation value, and determine the frequency compensation value corresponding to each first TRP according to the frequency offset estimation result and the reference point, so as to achieve an effect of eliminating the doppler spread range received by the terminal being too large.

Further, based on the above method, the determining of the reference point for frequency compensation according to the frequency offset estimation result in (1-1-2) may adopt, but is not limited to, the following implementation manners:

(1-2-1) determining the reference point according to a set rule.

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

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

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

(1-2-3) the reference point is a frequency offset estimation value corresponding to the maximum value of absolute values in frequency offset estimation values corresponding to each first TRP determined by the network side equipment;

(1-2-4) the reference point is a frequency offset estimation value corresponding to the minimum value of absolute values in the frequency offset estimation values corresponding to the first TRPs determined by the network side equipment;

(1-2-5) the reference point is the maximum value in the absolute values of the frequency offset estimation values corresponding to the first TRPs determined by the network side equipment;

(1-2-6) the reference point is the minimum value of the absolute values of the frequency offset estimation values corresponding to the first TRPs determined by the network side equipment;

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

Alternatively, when the respective first TRPs are divided into one or more TRP groups, (1-2-2) above may be: the reference point is a frequency deviation estimated value or a frequency compensation value corresponding to the appointed or selected TRP group; the above (1-2-3) may be: the reference point is the frequency deviation estimation value with the maximum absolute value in the frequency deviation estimation values corresponding to all TRP groups; the above (1-2-4) may be: the reference point is the frequency deviation estimation value with the minimum absolute value in the frequency deviation estimation values corresponding to all TRP groups; the above (1-2-5) may be: the reference point is the maximum value in the absolute values of the frequency deviation estimated values corresponding to all TRP groups; the above (1-2-6) may be: the reference point is the minimum value of the absolute values of the frequency offset estimation values corresponding to the TRP groups.

As can be seen from the above embodiments, the reference point may be determined according to a set rule, and then the frequency compensation value corresponding to each first TRP/TRP group is determined according to the reference point, so as to improve the reliability of determining the reference point.

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

In particular, the reference point for determining the frequency compensation value may be determined by the network side device. For example; the reference point indication information is sent by the terminal.

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

(1-3-2) the reference point indication information is indication information on a specified first TRP; wherein, the frequency offset estimation value corresponding to the appointed first TRP is the reference point;

(1-3-3) the reference point indication information is indication information on a downlink signal; the frequency offset estimation value 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 on the first uplink signal; and the network side equipment uses the frequency offset estimation value estimated by the first uplink signal indicated by the indication information as the reference point.

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

Alternatively, when the respective first TRPs are divided into one or more TRP groups, the reference point indication information in (1-3-2) above may also be indication information of a specified or selected TRP group. And, the reference point is the frequency offset estimate corresponding to the specified or selected set of TRPs. Wherein the indication information about the specified or selected TRP group may refer to information indicating an identity of the specified or selected TRP group.

The indication information about the downlink Signal in (1-3-3) above may refer to an SSB (Synchronization Signal Block) flag, a TRS (Tracking reference Signal) flag, or the like. The indication information about the downlink signal has an association relation with the TRP, the associated TRP can be determined according to the indication information, and the reference point is a frequency offset estimation value estimated by the TRP at the network side. Or, the network side determines the reference point according to the information obtained by the TRP associated with the indication information of the downlink signal in other manners. Note that SSB is sometimes written as a SS/PBCH Block, i.e., a Synchronization Signal/Physical Broadcast Channel Block Synchronization Signal/Broadcast Channel Block.

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

It can be seen from the above embodiments that the reference point can be determined according to reference point indication information sent by the terminal, and then the frequency compensation value corresponding to each first TRP/TRP group is determined according to the reference point, thereby enriching implementation manners for determining the reference point and improving flexibility for determining the reference point.

(1-4-1) determining, by the respective first TRPs, respective frequency offset values corresponding to the respective first TRPs using the first uplink signal; or

Optionally, each first TRP determines its corresponding frequency offset value using the first uplink signal.

Optionally, when each first TRP is divided into one or more TRP groups, each TRP group may determine its corresponding frequency offset value by using the first uplink signal, and further determine the frequency offset value corresponding to each first TRP. For all the first TRPs in each TRP group, the corresponding frequency offset values may be the same and are all the frequency offset values corresponding to the TRP group.

Optionally, the method for determining the frequency offset value corresponding to a first TRP or a first TRP group by using a first uplink signal includes: and performing frequency offset estimation by using the first uplink signal, and using the frequency offset estimation value as a frequency compensation value.

Optionally, the method for determining the frequency offset value corresponding to a first TRP or a first TRP group by using a first uplink signal includes: and carrying out frequency offset estimation by using the first uplink signal received by the user, and using a negative value of the frequency offset estimation value as a frequency compensation value.

(1-4-2) the central processing unit connected with the first TRP included in the network side device determines a frequency offset value corresponding to each first TRP by using the first uplink signal.

Optionally, when each first TRP is divided into one or more TRP groups, the central processing unit may determine a frequency offset value corresponding to each TRP group by using the first uplink signal, and further determine a frequency offset value corresponding to each first TRP. For all the first TRPs in each TRP group, the corresponding frequency offset values may be the same and are all the frequency offset values corresponding to the TRP group.

Optionally, the method for determining, by the central processing unit, the frequency compensation value corresponding to each TRP or TRP group by using the first uplink signal includes: and carrying out frequency offset estimation on the first uplink signals received by each TRP or TRP group, and using the frequency offset estimation value as a frequency compensation value.

Optionally, the method for determining, by the central processing unit, the frequency compensation value corresponding to each TRP or TRP group by using the first uplink signal includes: and carrying out frequency offset estimation on the first uplink signals received by each TRP or TRP group, and using the negative value of the frequency offset estimation value as a frequency compensation value.

In addition, the central processing unit in the embodiment of the present invention may be a processing unit of a network side device, and may also be a BBU, and the like, and is applicable to all embodiments described below, and details are not described later.

As can be seen from the above embodiments, when determining the frequency offset value corresponding to each first TRP/TRP group by using the first uplink signal, the frequency offset value corresponding to each first TRP/TRP group may be determined by each first TRP/TRP group, or the frequency offset value corresponding to each first TRP/TRP group may be determined by the central processing unit, so that implementation manners for determining the frequency offset value are enriched, and flexibility for determining the frequency offset value is improved.

(1-5-1) the respective first TRPs determining the reference point based on the frequency offset estimation result; or

Alternatively, the reference point may be determined from each TRP group when each first TRP is divided into one or more TRP groups. Such as: the reference point may be determined by one first TRP in each TRP group, instead of all TRP groups in each TRP group.

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

As can be seen from the above embodiments, when determining the reference point for determining the frequency compensation value, the reference point may be determined by each first TRP/TRP group, or may be determined by the central processing unit, so that the implementation manner of determining the reference point is enriched, and the flexibility of determining the reference point is improved.

Further, based on the above method, the reference point is determined by the respective first TRP in (1-5-1) according to the frequency offset estimation result, which may be implemented by, but is not limited to:

Specifically, each first TRP may perform frequency offset estimation (or doppler frequency offset estimation) respectively using the first uplink signal, the first TRPs intersect with each other and exchange information to determine a reference point, and each first TRP determines a transmission frequency for downlink transmission based on the same reference point.

Optionally, when each first TRP is divided into one or more TRP groups, each TRP group may perform information interaction on the frequency offset estimation value corresponding to each group, and determine a reference point for determining frequency compensation corresponding to each group according to the information of information interaction.

As can be seen from the above embodiments, each first TRP or TRP group performs information interaction on its corresponding frequency offset estimation value, and determines its corresponding reference point for determining frequency compensation according to the information of the information interaction, thereby implementing that each first TRP or TRP group determines the same reference point together, enriching the implementation manner of determining the reference point, and improving the flexibility of determining the reference point.

Further, based on the above method, in the (1-1-3), the frequency compensation value corresponding to each first TRP is determined according to the frequency offset estimation result and the reference point, and the following implementation manners may be adopted, but are not limited to:

(1-6-1) determining, by the first TRPs, respective frequency compensation values corresponding to the first TRPs according to the frequency offset estimation result and the reference point; or

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

Optionally, when each first TRP is divided into one or more TRP groups, in (1-6-1) above, each TRP group may determine, according to the frequency offset estimation result and the reference point, a frequency offset value corresponding to each TRP group, and further determine a frequency offset value corresponding to each first TRP. For all the first TRPs in each TRP group, the corresponding frequency offset values may be the same and are all the frequency offset values corresponding to the TRP group.

Optionally, when each first TRP is divided into one or more TRP groups, the central processing unit in (1-6-2) may determine, according to the frequency offset estimation result and the reference point, a frequency compensation value corresponding to each TRP group, and further determine a frequency compensation value corresponding to each first TRP. For all the first TRPs in each TRP group, the corresponding frequency offset values may be the same and are all the frequency offset values corresponding to the TRP group.

Optionally, the method for determining the frequency compensation value corresponding to each TRP or TRP group according to the frequency offset estimation result and the reference point includes: the frequency offset estimate plus the reference point is used as the frequency compensation value.

Optionally, the method for determining the frequency compensation value corresponding to each TRP or TRP group according to the frequency offset estimation result and the reference point includes: and subtracting the frequency deviation estimated value corresponding to the reference point from the reference point to be used as a frequency compensation value.

Optionally, the method for determining, by the central processing unit, the frequency compensation value corresponding to each TRP or TRP group according to the frequency offset estimation result and the reference point includes: and for each TRP or TRP group, using the frequency offset estimation value corresponding to the TRP or TRP group plus a reference point as a frequency compensation value.

Optionally, the method for determining, by the central processing unit, the frequency compensation value corresponding to each TRP or TRP group according to the frequency offset estimation result and the reference point includes: and subtracting the frequency offset estimation value corresponding to the reference point from each TRP or TRP group to serve as a frequency compensation value.

As can be seen from the above embodiments, when determining the frequency offset value corresponding to each first TRP according to the frequency offset estimation result and the reference point, the frequency offset value may be determined by each first TRP/TRP group, or may be determined by the central processing unit, so that implementation manners for determining the frequency offset value are enriched, and flexibility for determining the frequency offset value is improved.

Further, based on the above method, each first TRP in (1-6-1) determines a frequency compensation value corresponding to each first TRP according to the frequency offset estimation result and the reference point, and the following implementation manners may be adopted, but are not limited to:

Optionally, when each first TRP is divided into one or more TRP groups, each TRP group may determine its corresponding frequency compensation value according to its corresponding frequency offset estimation value and reference point, and further determine its corresponding frequency compensation value. For all the first TRPs in each TRP group, the corresponding frequency offset values may be the same and are all the frequency offset values corresponding to the TRP group.

The frequency offset estimation value of each TRP group may be obtained by performing frequency offset estimation on a first uplink signal corresponding to a first TRP in each TRP group.

As can be seen from the above embodiments, each first TRP/TRP group may determine a frequency offset estimation value corresponding to itself, and determine a frequency compensation value corresponding to itself according to the frequency offset estimation value corresponding to itself and the same reference point corresponding to each first TRP, thereby enriching implementation manners for determining the frequency compensation value and improving flexibility for determining the frequency compensation value.

(1-7-1) the second TRP determines a frequency compensation value corresponding to the second TRP according to the frequency offset estimation value corresponding to the second TRP, and sends the determined frequency compensation value or the frequency offset estimation value corresponding to the second TRP to a third TRP; wherein the second TRP is used for characterizing one part of TRP in each first TRP, and the third TRP is used for characterizing the other part of TRP in each first TRP.

Correspondingly, in the step 130, the transmission frequency of each first TRP for downlink transmission is determined according to the frequency offset value corresponding to each first TRP, which may be implemented by, but is not limited to the following implementation manners:

(1-7-2) the second TRP determining a transmission frequency itself for downlink transmission according to the frequency offset value determined itself;

(1-7-3) the third TRP determines the transmission frequency used 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 performs frequency offset estimation (or estimates doppler frequency offset) using the first uplink signal, the second TRP determines a frequency compensation value corresponding to the second TRP according to the frequency offset estimation value corresponding to the second TRP, and sends the frequency compensation value estimated by the second TRP to the third TRP, and the third TRP determines a frequency compensation value according to the frequency compensation value sent by the partial RRH, and determines the transmission frequency for downlink transmission using the frequency compensation value.

Wherein the second TRP may be one first TRP or one TRP group. Wherein one TRP group may include one or more TRPs.

As can be seen from the above embodiments, the second TRP determines its own transmission frequency for downlink transmission according to the frequency compensation value determined by itself; and the third TRP determines the 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, thereby reducing the complexity of determining the frequency compensation value and improving the frequency compensation efficiency.

(1-8-1) each first TRP respectively carries out frequency offset estimation on the first uplink signal to obtain a frequency offset estimation value corresponding to each first TRP;

(1-8-2) each first TRP determines a corresponding frequency compensation value according to a corresponding frequency offset estimation value.

Optionally, (1-8-1) 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, to obtain corresponding frequency offset estimation values. The frequency offset estimation value of each TRP group may be obtained by performing frequency offset estimation on a first uplink signal corresponding to a first TRP in each TRP group.

In addition, in addition to (1-8-1), the first TRP may perform frequency offset estimation on the first uplink signal to obtain respective corresponding frequency offset estimation values, and a central processing unit connected to the first TRP and included in the network side device may perform frequency offset estimation on the first uplink signal to obtain respective corresponding frequency offset estimation values of the first TRPs, and determine respective corresponding frequency compensation values of the first TRPs.

Optionally, 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 a frequency offset estimation value corresponding to each TRP group. The frequency offset estimation value of each TRP group may be obtained by performing frequency offset estimation on a first uplink signal corresponding to a first TRP in each TRP group.

In the above (1-8-2), when each first TRP is divided into one or more TRP groups, each corresponding frequency offset value may be determined by each TRP group according to the corresponding frequency offset estimation value, and then the corresponding frequency offset value of each first TRP may be further determined. For all the first TRPs in each TRP group, the corresponding frequency offset values may be the same and are all the frequency offset values corresponding to the TRP group.

In addition, in addition to the (1-8-2), the frequency offset estimation value corresponding to each first TRP may be determined by each first TRP according to the frequency offset estimation value corresponding to each first TRP, and the frequency offset compensation value corresponding to each first TRP may be determined by a central processing unit included in the network side device and connected to the first TRP according to the frequency offset estimation value corresponding to each first TRP.

Optionally, when the first TRPs are divided into one or more TRP groups, the central processing unit may determine a frequency offset value corresponding to each TRP group according to the frequency offset estimation value of each TRP group, and further determine a frequency offset value corresponding to each first TRP. For all the first TRPs in each TRP group, the corresponding frequency offset values may be the same and are all the frequency offset values corresponding to the TRP group.

Optionally, the method for determining the frequency compensation value corresponding to each TRP or TRP group according to the frequency offset estimation result includes: the frequency offset estimate is used as a frequency compensation value.

Optionally, the method for determining the frequency compensation value corresponding to each TRP or TRP group according to the frequency offset estimation result includes: the negative of the frequency offset estimate is used as the frequency compensation value.

Optionally, the method for determining, by the central processing unit, the frequency compensation value corresponding to each TRP or TRP group according to the frequency offset estimation result includes: and for each TRP or TRP group, using the frequency offset estimation value corresponding to the TRP or TRP group as a frequency compensation value.

Optionally, the method for determining, by the central processing unit, the frequency compensation value corresponding to each TRP or TRP group according to the frequency offset estimation result includes: and for each TRP or TRP group, using the negative value of the frequency deviation estimation value corresponding to the TRP or TRP group as a frequency compensation value.

As can be seen from the above embodiments, when the reference point for determining the frequency compensation value is 0, after the first TRP/TRP groups perform frequency offset estimation (or estimate doppler frequency offset) on the first uplink signal, the respective corresponding frequency compensation values may be determined directly according to the respective corresponding frequency offset estimation values, so as to further improve the efficiency of frequency compensation.

Further, based on the above method, the downlink transmission in step 130 may include transmission of a downlink signal specific to the terminal.

Specifically, the transmission of the terminal-specific downlink signal includes, but is not limited to: a PDSCH (Physical Downlink Shared Channel), a PDCCH (Physical Downlink Control Channel) specific to a terminal, a DMRS of the PDSCH, a DMRS of the PDCCH, and a PT-RS (phase reference signal).

As can be seen from the foregoing embodiments, the transmission frequency of each first TRP for downlink transmission is determined according to the frequency compensation value corresponding to each first TRP, so that, during transmission of a downlink signal dedicated to a terminal, doppler spread at a terminal side can be effectively eliminated, and the performance of transmission of the downlink signal dedicated to the terminal is further improved.

Further, based on the above method, the frequency offset estimation performed by using the first uplink signal in (1-1-1) may obtain a frequency offset estimation result by using, but not limited to, the following implementation manners:

(1-9-1) each first TRP respectively carries out frequency offset estimation on the first uplink signal to obtain a frequency offset estimation value corresponding to each first TRP.

Optionally, 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, to obtain respective corresponding frequency offset estimation values. The frequency offset estimation value of each TRP group may be obtained by performing frequency offset estimation on a first uplink signal corresponding to a first TRP in each TRP group.

It can be seen from the above embodiments that, when the first uplink signal is used to perform frequency offset estimation to obtain a frequency offset estimation result, each first TRP/TRP group may perform frequency offset estimation on the first uplink signal to obtain respective corresponding frequency offset estimation values, 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) may use the same first uplink signal to perform frequency offset estimation on each first TRP.

Further, based on the above method, the first uplink signals in (1-8-1) and (1-9-1) may include second uplink signals, corresponding to the first TRPs, for performing frequency offset estimation; correspondingly, the frequency offset estimation is performed on the first uplink signal by each first TRP in (1-8-1) and (1-9-1), so as to obtain a corresponding frequency offset estimation value, which may adopt but is not limited to the following implementation manners:

(1-10-1) each first TRP respectively performs frequency offset estimation on the corresponding second uplink signal to obtain a corresponding frequency offset estimation value.

As can be seen from the above embodiments, each first TRP may use the same first uplink signal to perform frequency offset estimation, and may also use the corresponding second uplink signal to perform frequency offset estimation, respectively, so as to enrich the implementation manners of frequency offset estimation and improve the flexibility of frequency offset estimation.

Further, based on the method, the method further comprises:

(1-11-1) sending the association relation between each first TRP and the second uplink signal to a terminal. Optionally, the association relationship is indicated by any one of the following messages:

spatial relationship information (spatialrelalationinfo) of the second uplink signal;

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

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

The spatial relationship information may be used to indicate a downlink signal associated with a second uplink signal, so that a transmit spatial filter of the uplink signal is determined according to a receive spatial filter of the downlink signal (or a transmit beam of the uplink signal is determined according to a receive beam of the downlink signal), and the first TRP/first TRP set used to transmit the downlink signal is the first TRP/first TRP set used to receive the uplink signal.

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

Optionally, the QCL indication information includes a type of QCL, such as Doppler shift (Doppler shift), Doppler Spread (Doppler Spread), and the like. Or, the QCL indication information is used to indicate an associated downlink signal, and the first TRP/first TRP set for transmitting the downlink signal is the same as the first TRP/first TRP set for receiving the second uplink signal.

As can be seen from the foregoing embodiments, by sending the association relationship between each first TRP and the second uplink signal to the terminal, the terminal may send the corresponding first uplink signal to the network side device according to the association relationship, where the first uplink signal may include the second uplink signal for performing frequency offset estimation, which corresponds to each first TRP, and thus, the reliability of frequency compensation is improved.

Fig. 2 is a flowchart of a frequency compensation method according to an embodiment of the present invention, where the frequency compensation method can be used for a terminal; as shown in fig. 2, the method comprises the steps of:

step 210: and generating a first uplink signal for frequency compensation according to the configuration or the indication of the network side equipment.

Specifically, the terminal may send the first uplink signal based on the configuration of the network side, that is, the network side sends the configuration information, and the terminal sends the first uplink signal according to the configuration information; the network side may also send the configuration information of the first uplink signal, but an indication information is further needed to indicate the terminal to send the first uplink signal (for example, by triggering signaling or activating signaling), and the user equipment UE receives the indication information and then sends the first uplink signal.

Optionally, the network side device includes a central processing unit and a TRP, and the configuration or indication of the network side device may be performed by the central processing unit or by the TRP.

Step 220: and sending the first uplink signal to network side equipment, so that the network side equipment receives the first uplink signal sent by the terminal by using one or more first TRPs, determines a frequency compensation value corresponding to each first TRP by using the first uplink signal, and determines a transmission frequency used for downlink transmission of each first TRP according to the frequency compensation value corresponding to each first TRP.

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

Optionally, each first TRP performs reception of a first uplink signal for frequency compensation transmitted by the terminal.

The first uplink signal may be an SRS, a random access signal, and other reference signals that may be used for frequency compensation. Wherein, the random access signal may be transmitted through the PRACH.

As can be seen from the foregoing embodiments, according to the configuration or the indication of the network side device, a first uplink signal for frequency compensation may be generated, and the first uplink signal is sent to the network side device, so that the network side device may receive the first uplink signal sent by the terminal by using one or more first TRPs; determining a frequency compensation value corresponding to each first TRP by using the first uplink signal; and determining the transmission frequency of each first TRP for downlink transmission according to the frequency compensation value corresponding to each first TRP, so that the transmission frequency after frequency compensation can be used for downlink transmission when each first TRP carries out downlink transmission, thereby realizing the frequency compensation aiming at each first TRP when carrying out downlink transmission, effectively eliminating the Doppler expansion at the terminal side and also improving the performance of downlink transmission.

Further, based on the above method, the first uplink signals used by the respective first TRPs for frequency offset estimation in step 220 may be the same.

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

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

(2-1-1) receiving an association relationship of the respective first TRPs with the second uplink signal.

a TCI state of the second upstream signal;

and the second uplink signal QCL indication information.

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

(2-2-1) receiving a downstream signal associated with the second upstream signal;

correspondingly, the sending of the first uplink signal to the network side device in step 220 may adopt, but is not limited to, the following implementation manners:

(2-3-1) sending the first uplink signal to the network side device based on the reception of the downlink signal.

Specifically, the terminal may perform downlink signal detection, obtain a downlink frequency point, and send the first uplink signal based on the downlink frequency point. The downlink signal may be an SSB or a TRS.

Optionally, 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.

Optionally, the terminal determines a plurality of downlink frequency points based on a plurality of downlink signals, determines a plurality of uplink frequency points based on the plurality of downlink frequency points, and then uses the uplink frequency points as 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 one TRP or one TRP group, and an uplink frequency point of any second uplink signal is determined according to a downlink frequency point determined by the downlink signal associated with the uplink signal.

Optionally, a manner for the terminal to determine the uplink frequency point based on the downlink frequency point is as follows: the uplink frequency point is equal to the downlink frequency point plus the downlink frequency deviation. The uplink and downlink frequency deviation is indicated to the terminal by the network equipment, or specified by a protocol, or determined by the terminal according to the indication information of the network equipment.

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

Alternatively, the terminal may determine the frequency of the uplink signal based on the downlink signal; determining a sending spatial filter of an uplink signal according to a receiving spatial filter of a downlink signal; determining a transmitting wave beam of an uplink signal according to a receiving wave beam of a downlink signal; and the like.

As can be seen from the above embodiments, for each first TRP, the terminal may send the same first uplink signal or send the second uplink signal corresponding to each first TRP, thereby enriching the frequency compensation manner and improving the flexibility of frequency compensation.

The following description will be made of a specific example of the frequency compensation method shown in fig. 1 and 2.

Example 1:

one BBU is connected with 4 TRPs, and the order in which a train passes through these TRPs will be TRP1, TRP2, TRP3, TRP4, according to the direction of travel of the train. Suppose that the frequency point of the downlink signal is f_DLThe Doppler frequency offset estimation of the TRP and the terminal is ideal estimation, the unidirectional Doppler frequency shifts of the TRP1, the TRP2, the TRP3 and the TRP4 are f1, f2, f3 and f4 respectively, the reference point of frequency compensation is f0+ f1, and the frequency compensation value is the difference value of the reference point and the Doppler frequency shift value estimated by the TRP.

The frequency (assuming that the offset of the downlink signal resource position relative to the downlink frequency point is not considered) when the downlink signal from each TRP reaches the UE without frequency compensation is: TRP1 is f_DL+ f 1; TRP2 is f_DL+ f 2; TRP3 is f_DL+ f 2; TRP4 is f_DL+f2；

The uplink frequency points determined by the terminal are assumed to be: f. of_UL；

The frequency of the uplink signal received by the TRP when reaching the TRP (assuming that the offset of the uplink signal resource position relative to the downlink frequency point is not considered) is: TRP1 is f_UL+ f 1; TRP2 is f_UL+ f 2; TRP3 is f_UL+ f 3; TRP4 is f_UL+f4；

TRP uses the following frequency compensation values: TRP1 is f 0; TRP2 is f0+ f1-f 2; TRP3 is f0+ f1-f 3; TRP4 is f0+ f1-f 4;

then frequency compensated to the UEThe frequency of the downlink signal from each TRP is: TRP1 is f_DL+ f0+ f 1; TRP2 is f_DL+ f0+ f 1; TRP3 is f_DL+ f0+ f 1; TRP4 is f_DL+f0+f1。

Therefore, the Doppler frequency shift of the downlink signals from the TRPs received by the terminal is the same, and the terminal can estimate the Doppler frequency shift more easily to obtain better downlink receiving performance.

Example 2:

one BBU is connected with 4 TRPs, and the order in which a train passes through these TRPs will be TRP1, TRP2, TRP3, TRP4, according to the direction of travel of the train. Assuming that the Doppler frequency offset estimation of the TRP and the terminal is ideal estimation, the one-way Doppler frequency offsets of the TRP1, the TRP2, the TRP3 and the TRP4 are f1, f2, f3 and f4 respectively, f0 is the difference value between the uplink frequency point determined by the terminal and the actual uplink frequency point, and the frequency compensation value is a negative Doppler frequency offset value estimated by the TRP.

Among them, the frequency (downlink reception frequency) of the downlink signal from each TRP arriving at the UE without frequency compensation: TRP1 is f_DL+ f 1; TRP2 is f_DL+ f 2; TRP3 is f_DL+ f 2; TRP4 is f_DL+f2；

The uplink frequency points determined by the terminal are as follows: f. of_UL；

Frequency of an uplink signal received by the TRP when reaching the TRP: TRP1 is f_UL+ f 1; TRP2 is f_UL+ f 2; TRP3 is f_UL+ f 3; TRP4 is f_UL+f4；

Each TRP uses the following frequency compensation value: TRP1 is f0-f 1; TRP2 is f0-f 2; TRP3 is f0-f 2; TRP4 is f0-f 2;

the frequency of the downlink signal from each TRP arriving at the UE after the frequency compensation is: TRP1 is f_DL+ f 0; TRP2 is f_DL+ f 0; TRP3 is f_DL+ f 0; TRP4 is f_DL+f0。

Therefore, under the scheme of the invention, the Doppler frequency shift of the downlink signals from all TRPs received by the UE is the same, and the UE can estimate the Doppler frequency shift more easily to obtain better downlink receiving performance.

Fig. 3 is a block diagram of a frequency compensation apparatus according to an embodiment of the present invention, where the frequency compensation apparatus may be used in a network device, such as: the network side equipment can comprise BBU, TRP and the like; as shown in fig. 3, the frequency compensation apparatus may include:

a receiving module 31, configured to receive a first uplink signal for frequency compensation sent by a terminal using one or more first transmission receiving points TRP;

a frequency compensation determining module 32, configured to determine, by using the first uplink signal, a frequency compensation value corresponding to each first TRP;

a transmission frequency determining module 33, configured to determine, according to the frequency compensation value corresponding to each first TRP, a transmission frequency used by each first TRP for downlink transmission.

Further, based on the above apparatus, the frequency compensation determining module 32 may include:

the frequency offset estimation submodule is used for carrying out frequency offset estimation by utilizing the first uplink signal to obtain a frequency offset estimation result;

a reference point determining submodule for determining a reference point for frequency compensation according to the frequency offset estimation result;

and the frequency compensation value determining submodule is used for determining the frequency compensation value corresponding to each first TRP according to the frequency offset estimation result and the reference point.

Further, based on the above apparatus, the reference point determining sub-module may include:

and the first determining unit is used for determining the reference point according to a set rule.

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

the reference point is a frequency offset estimation value or a frequency compensation value corresponding to a specified first TRP determined by the network side equipment;

the reference point is the minimum value in the absolute values of the frequency offset estimation values corresponding to the first TRPs determined by the network side equipment;

and the reference point is an uplink frequency point determined by the network side equipment.

and the second determining unit is used for determining the reference point according to the reference point indication information sent by the terminal.

Further, based on the above apparatus, the reference point indication information includes any one of:

a first determining submodule, configured to determine, by using the first uplink signal, a frequency compensation value corresponding to each first TRP; or

And the second determining submodule is used for determining the frequency compensation value corresponding to each first TRP by using the first uplink signal through a baseband processing unit central processing unit connected with the first TRP and included in the network side equipment.

a third determination unit configured to determine the reference point for each of the first TRPs; or

A fourth determining unit, configured to determine the reference point by using a central processing unit connected to the first TRP included in the network-side device.

Further, based on the above apparatus, the frequency compensation value determining sub-module may include:

a fifth determining unit, configured to determine, according to the frequency offset estimation result and the reference point, a frequency compensation value corresponding to each first TRP; or

And a sixth determining unit, configured to determine, by a central processing unit connected to the first TRPs and included in the network-side device, frequency compensation values corresponding to the first TRPs according to the frequency offset estimation result and the reference point.

Further, based on the above apparatus, the third determining unit includes:

and the first determining subunit is used for performing information interaction on the frequency offset estimation value corresponding to each first TRP, and determining a reference point corresponding to the first determining subunit and used for determining frequency compensation according to the information of the information interaction.

Further, based on the above apparatus, the fifth determining unit may include:

and the second determining subunit is used for determining the frequency compensation value corresponding to each first TRP according to the frequency offset estimation value corresponding to each first TRP and the reference point.

a seventh determining unit, configured to determine, by the second TRP, a frequency compensation value corresponding to the second TRP according to the frequency offset estimation value corresponding to the second TRP, and send the determined frequency compensation value or the frequency offset estimation value corresponding to the second TRP to a third TRP; wherein the second TRP is used for characterizing one part of TRP in each first TRP, and the third TRP is used for characterizing the other part of TRP in each first TRP.

Correspondingly, the transmission frequency determining module 33 may include:

a first frequency determining submodule, configured to determine, by the second TRP, a transmission frequency used for downlink transmission according to the frequency compensation value determined by the second TRP;

and the second frequency determining submodule is used for determining the transmission frequency used for downlink transmission by the third TRP according to the frequency compensation value determined by the second TRP or the frequency offset estimation value corresponding to the second TRP by the third TRP.

the first processing submodule is used for performing frequency offset estimation on the first uplink signal by each first TRP to obtain respective corresponding frequency offset estimation values;

and the second processing submodule is used for determining respective corresponding frequency compensation values of the first TRPs according to the respective corresponding frequency offset estimation values.

Further, the downlink transmission is established on the basis of the above device, and the downlink transmission includes transmission of a downlink signal specific to the terminal.

Further, based on the foregoing apparatus, the frequency offset estimation sub-module may include:

and the frequency offset estimation unit is used for performing frequency offset estimation on the first uplink signals by each first TRP to obtain respective corresponding frequency offset estimation values.

Further, based on the above apparatus, the same first uplink signal is used to perform frequency offset estimation on each first TRP.

Further, based on the apparatus, the first uplink signal includes a second uplink signal for performing frequency offset estimation, which corresponds to each first TRP;

Further, on the basis of the above device, the method further includes:

an association relation sending module, configured to send, to a terminal, an association relation between each of the first TRPs and the second uplink signal; optionally, the association relationship is indicated by any one of the following messages:

spatial relationship information of the second uplink signal;

a TCI state of the second upstream signal;

and the second uplink signal QCL indication information.

It should be noted that the apparatus provided in this embodiment can implement all the method steps that can be implemented by the above method embodiment, and can achieve the same beneficial effects, and the same contents and beneficial effects in this apparatus embodiment as those in the above method embodiment are not described again.

Fig. 4 is a block diagram of a frequency compensation apparatus according to an embodiment of the present invention, where the frequency compensation apparatus can be used in a terminal; as shown in fig. 4, the frequency compensation apparatus may include:

a generating module 41, configured to generate a first uplink signal for frequency compensation according to a configuration or an instruction of a network-side device;

a sending module 42, configured to send the first uplink signal to a network side device, so that the network side device receives the first uplink signal sent by the terminal by using one or more first transmission and reception points TRP, determines, by using the first uplink signal, a frequency offset value corresponding to each first TRP, and determines, according to the frequency offset value corresponding to each first TRP, a transmission frequency used by each first TRP for downlink transmission.

Further, based on the above apparatus, the first uplink signals used by the first TRPs for frequency offset estimation are the same.

Further, based on the apparatus, the first uplink signal includes a second uplink signal for performing frequency offset estimation, where the second uplink signal corresponds to each first TRP.

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

an association relation receiving module, configured to receive an association relation between each of the first TRPs and the second uplink signal; optionally, the association relationship is indicated by any one of the following messages:

spatial relationship information of the second uplink signal;

and the second uplink signal quasi-co-location QCL indication information.

Further, based on the above apparatus, the association relationship indicates a downlink signal associated with the first uplink signal; the frequency compensation device further includes:

an association receiving module, configured to receive a downlink signal associated with the second uplink signal;

correspondingly, the sending module 42 may include:

and the sending submodule is used for sending the first uplink signal to the network side equipment based on the receiving of the downlink signal.

Fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention, and 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 by a bus system 505. It is understood that the bus system 505 is used to enable connection communications between these components. The bus system 505 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus 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 (trackball), a touch pad, or a touch screen, among others.

It is to be understood that the memory 502 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 502 of the systems and methods described in connection with the various embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 502 stores elements, executable modules or data structures, or a subset thereof, or an expanded set thereof, such as: an operating system 5021 and application programs 5022.

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

In the embodiment of the present invention, by calling a computer program or an instruction stored in the memory 502, specifically, a computer program or an instruction stored in the application 5022, the processor 501 is configured to:

The method disclosed by the above-mentioned 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 having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 501. The Processor 501 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. 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 connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known 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 method in combination with the hardware.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in the embodiments of the invention. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

Optionally, as another embodiment, the processor 501 is further configured to: the first uplink signals used for frequency offset estimation by the first TRPs are the same.

Optionally, as another embodiment, the processor 501 is further configured to: the first uplink signals comprise second uplink signals which are respectively corresponding to the first TRPs and used for frequency offset estimation.

Optionally, as another embodiment, the processor 501 is further configured to: receiving the association relation between each first TRP and the second uplink signal; optionally, the association relationship is indicated by any one of the following messages:

spatial relationship information of the second uplink signal;

and the second uplink signal quasi-co-location QCL indication information.

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

receiving a downlink signal associated with the second uplink signal;

the sending the first uplink signal to a network side device includes:

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

Fig. 6 is a schematic structural diagram of another terminal according to an embodiment of the present invention, where the terminal in fig. 6 may be a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), an electronic reader, a handheld game machine, a Point of Sales (POS), a vehicle-mounted electronic device (vehicle-mounted computer), or the like. 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 skilled in the art will appreciate that the handset configuration shown in fig. 6 is not intended to be limiting and may include more or fewer components than those shown, or may combine certain components, or split certain components, or arranged in different components.

The input unit 630 may be used, among other things, to receive numeric or character information input by a user and to generate signal inputs related to user settings and function control of the terminal. Specifically, in the 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 touch operations of a user (e.g., operations of the user on the touch panel 6301 by using a finger, a stylus pen, or any other suitable object or accessory) thereon or nearby, and drive the corresponding connection device according to a preset program. Alternatively, the touch panel 6301 may include two parts, i.e., a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 660, and can receive and execute commands sent by the processor 660. In addition, the touch panel 6301 can be implemented by using various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The input unit 630 may include other input devices 6302 in addition to the touch panel 6301, and the other input devices 6302 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. In particular, other input devices 6302 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, a light mouse (a light mouse is a touch-sensitive surface that does not display visual output, or is an extension of a touch-sensitive surface formed by a touch screen), and the like.

Among them, the display unit 640 may be used to display information input by a 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 as a Display panel 6401 in the form of a Liquid Crystal Display (LCD), an organic light-Emitting Diode (OLED), or the like.

It should be noted that the touch panel 6301 may cover the display panel 6401 to form a touch display screen, and when the touch display screen detects a touch operation thereon or nearby, the touch display screen is transmitted to the processor 660 to determine the type of the touch event, and then the processor 660 provides a corresponding visual output on the touch display screen according to the type of the touch event.

The touch display screen comprises an application program interface display area and a common control display area. The arrangement modes of the application program interface display area and the common control display area are not limited, and can be an arrangement mode which can distinguish two display areas, such as vertical arrangement, left-right arrangement and the like. The application interface display area may be used to display an interface of an application. Each interface may contain at least one interface element such as an icon and/or widget desktop control for an application. The application interface display area may also be an empty interface that does not contain any content. The common control display area is used for displaying controls with high utilization rate, such as application icons like setting buttons, interface numbers, scroll bars, phone book icons and the like.

The RF circuit 610 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, receives downlink information from a network side and then processes the received downlink information to the processor 660; in addition, the design uplink data is sent to the network side. In general, 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 circuitry 610 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to Global System for mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), and the like.

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

The processor 660 is a control center of the terminal, connects various parts of the entire mobile phone by using various interfaces and lines, and executes various functions and processes data of the terminal by running or executing software programs and/or modules stored in the first memory 6201 and calling data stored in the second memory 6202, thereby integrally monitoring the terminal. Optionally, processor 660 may include one or more processing units.

In this embodiment, the processor 660 is configured to, by calling the software programs and/or modules stored in the first memory 6201 and/or the data stored in the second memory 6202:

Optionally, as another embodiment, the processor 660 is further configured to: the first uplink signals used for frequency offset estimation by the first TRPs are the same.

Optionally, as another embodiment, the processor 660 is further configured to: the first uplink signals comprise second uplink signals which are respectively corresponding to the first TRPs and used for frequency offset estimation.

Optionally, as another embodiment, the processor 660 is further configured to: receiving the association relation between each first TRP and the second uplink signal; optionally, the association relationship is indicated by any one of the following messages:

spatial relationship information of the second uplink signal;

and the second uplink signal quasi-co-location QCL indication information.

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

receiving a downlink signal associated with the second uplink signal;

the sending the first uplink signal to a network side device includes:

Fig. 7 is a schematic structural diagram of a network-side device according to an embodiment of the present invention, and as shown in fig. 7, the network-side device 700 may include at least one processor 701, a memory 702, at least one other user interface 703, and a transceiver 704. The various components in network-side device 700 are coupled together by a bus system 705. It is understood that the bus system 705 is used to enable communications among the components. The bus system 705 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled in fig. 7 as the bus system 705, which may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 701, and various circuits, represented by the memory 702, being linked together. The bus system may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, embodiments of the present invention will not be described any further. The bus interface provides an interface. The transceiver 704 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 703 may also be an interface capable of interfacing externally to a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

It is to be understood that the memory 702 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 702 of the systems and methods described in connection with the various embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.

The processor 701 is responsible for managing the bus system and the general processing, and the memory 702 may store computer programs or instructions used by the processor 701 in performing operations, in particular, the processor 701 may be configured to:

The method 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 having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 701. The Processor 701 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. 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 connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702 and performs the steps of the above method in combination with the hardware thereof.

Optionally, as another embodiment, the processor 701 is further configured to: the determining, by using the first uplink signal, a frequency compensation value corresponding to each first TRP includes:

Optionally, as another embodiment, the processor 701 is further configured to: the performing frequency offset estimation by using the first uplink signal to obtain a frequency offset estimation result includes:

Optionally, as another embodiment, the processor 701 is further configured to: determining a reference point for frequency compensation according to the frequency offset estimation result, comprising:

Optionally, as another embodiment, the processor 701 is further configured to: the setting rule includes any one of:

Optionally, as another embodiment, the processor 701 is further configured to: the reference point indication information includes any one of:

Optionally, as another embodiment, the processor 701 is further configured to: the determining a reference point for frequency compensation according to the frequency offset estimation result includes:

Optionally, as another embodiment, the processor 701 is further configured to: the determining, by each first TRP, the reference point according to the frequency offset estimation result includes:

Optionally, as another embodiment, the processor 701 is further configured to: determining, by each first TRP, a frequency compensation value corresponding to each first TRP according to the frequency offset estimation result and the reference point, including:

Optionally, as another embodiment, the processor 701 is further configured to: determining, according to the frequency compensation value corresponding to each first TRP, a transmission frequency used by each first TRP for downlink transmission, including:

Optionally, as another embodiment, the processor 701 is further configured to: the determining, by the first TRPs, the respective frequency compensation values corresponding to the respective first TRPs by using the first uplink signals includes:

Optionally, as another embodiment, the processor 701 is further configured to: the first uplink signals comprise second uplink signals which are respectively corresponding to the first TRPs and used for frequency offset estimation;

Optionally, as another embodiment, the processor 701 is further configured to: further comprising:

spatial relationship information of the second uplink signal;

a TCI state of the second upstream signal;

and the second uplink signal QCL indication information.

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

The above description mainly introduces the scheme provided by the embodiment of the present invention from the perspective of a network side device. It is understood that, in order to implement the above functions, the network-side device provided in the embodiment of the present invention includes a hardware structure and/or a software module corresponding to the execution of each function. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software for performing the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein.

Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiment of the present invention, the network side device and the like may be divided into functional modules according to the above 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. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units.

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

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

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 such understanding, all or part of the technical solution can be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a processor to execute all or part of the steps of the method according to the embodiments of the present invention. The computer storage medium is a non-transitory (English) medium, comprising: flash memory, removable hard drive, read only memory, random access memory, magnetic or optical disk, and the like.

In another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented by a processor to perform the method provided in the foregoing embodiments, and the method includes:

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A frequency compensation method is used for a network side device, and comprises the following steps:

2. The method according to claim 1, wherein the determining, by using the first uplink signal, the frequency compensation value corresponding to each first TRP comprises:

3. The method of claim 2, wherein the performing frequency offset estimation by using the first uplink signal to obtain a frequency offset estimation result comprises:

4. The method of claim 2, wherein the determining a reference point for frequency compensation according to the frequency offset estimation result comprises:

5. The frequency compensation method according to claim 4, wherein the setting rule comprises any one of:

6. The frequency compensation method of claim 4, wherein the reference point indication information comprises any one of:

7. The method according to any of claims 2 to 4, wherein the determining a reference point for frequency compensation according to the frequency offset estimation result comprises:

8. The method of frequency compensation according to claim 7, wherein the determining the reference point by the respective first TRP according to the frequency offset estimation result comprises:

9. The method according to any one of claims 2 to 4, wherein the determining, according to the frequency offset estimation result and the reference point, a frequency compensation value corresponding to each first TRP comprises:

10. The method of frequency compensation according to claim 9, wherein the determining, by the first TRPs according to the frequency offset estimation result and the reference point, a frequency compensation value corresponding to each first TRP comprises:

11. The method of frequency compensation according to claim 2, wherein the determining the frequency compensation value corresponding to each first TRP according to the frequency offset estimation result and the reference point comprises:

12. The method of claim 11, wherein the determining the transmission frequency of each first TRP for downlink transmission according to the frequency compensation value corresponding to each first TRP comprises:

13. The method according to any one of claims 1 to 4, wherein the determining, by using the first uplink signal, the frequency compensation value corresponding to each first TRP comprises:

14. The method for frequency compensation according to claim 13, wherein the determining, by the first TRP, the frequency compensation value corresponding to each first TRP by using the first uplink signal comprises:

15. The method of claim 14, wherein the first uplink signal comprises a second uplink signal for performing frequency offset estimation corresponding to each first TRP;

16. The frequency compensation method of claim 15, further comprising:

and sending the association relation between each first TRP and the second uplink signal to a terminal.

17. The frequency compensation method of claim 16, further comprising: the association is indicated by any of the following messages:

spatial relationship information of the second uplink signal;

and the second uplink signal quasi-co-location QCL indication information.

18. A frequency compensation method, wherein the frequency compensation method is used for a terminal, and comprises:

19. The method of claim 18, wherein the first uplink signals for frequency offset estimation of the first TRPs are identical.

20. The method of claim 18, wherein the first uplink signal comprises a second uplink signal for performing frequency offset estimation corresponding to each first TRP.

21. The frequency compensation method of claim 20, further comprising:

and receiving the association relation between each first TRP and the second uplink signal.

22. The frequency compensation method of claim 21, further comprising: the association is indicated by any of the following messages:

spatial relationship information of the second uplink signal;

and the second uplink signal quasi-co-location QCL indication information.

23. The frequency compensation method of claim 22, wherein the association indicates a downlink signal associated with the first uplink signal; the frequency compensation method further includes:

receiving a downlink signal associated with the second uplink signal;

the sending the first uplink signal to a network side device includes:

24. A frequency compensation apparatus, wherein the frequency compensation apparatus is used for a network side device, and comprises:

25. A frequency compensation apparatus, wherein the frequency compensation apparatus is used for a terminal, and comprises:

26. A network side device, comprising a memory, a processor, and a program stored in the memory and executable on the processor, wherein the network side device includes a plurality of remote radio heads TRP, and the processor executes the program to implement the following steps:

27. The network-side device of claim 26, wherein the determining, by using the first uplink signal, the frequency offset value corresponding to each first TRP includes:

28. The network-side device of claim 27, wherein the performing frequency offset estimation by using the first uplink signal to obtain a frequency offset estimation result includes:

29. The network-side device of claim 28, wherein the first uplink signal includes a second uplink signal for performing frequency offset estimation, which corresponds to each first TRP;

30. The network-side device of claim 29, further comprising:

31. A terminal comprising a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

32. The terminal of claim 31, wherein the first uplink signal comprises a second uplink signal for performing frequency offset estimation corresponding to each first TRP.

33. The terminal of claim 32, further comprising:

34. The terminal of claim 33, wherein the association indicates a downlink signal associated with the first uplink signal; the frequency compensation method further includes:

receiving a downlink signal associated with the second uplink signal;

the sending the first uplink signal to a network side device includes:

35. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the frequency compensation method according to any one of claims 1 to 17.

36. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the frequency compensation method according to any one of claims 18 to 23.