WO2021155789A1

WO2021155789A1 - Frequency offset pre-compensation indication method, terminal device and network device

Info

Publication number: WO2021155789A1
Application number: PCT/CN2021/074918
Authority: WO
Inventors: 刘昊; 孙彦良; 孙鹏; 宋扬; 塔玛拉卡拉盖施
Original assignee: 维沃移动通信有限公司
Priority date: 2020-02-05
Filing date: 2021-02-02
Publication date: 2021-08-12
Also published as: CN113225293B; CN113225293A

Abstract

Disclosed in the present invention are a frequency offset pre-compensation indication method, a terminal device and a network device. The frequency offset pre-compensation indication method is applied to a terminal device, and said method comprises: sending uplink signaling to a network device to indicate whether frequency offset pre-compensation is performed when the terminal device sends an uplink signal.

Description

Frequency offset pre-compensation indication method, terminal equipment and network equipment

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 202010080907.9 filed in China on February 05, 2020, and the entire content of which is incorporated herein by reference.

Technical field

The present invention relates to the field of communications, in particular to a frequency offset pre-compensation indication method, terminal equipment and network equipment.

Background technique

At present, the speed of high-speed rail has generally reached 300km/h, and will even exceed 500km/h in the future. Although high-speed rail has brought convenience to everyone's travel, its high-speed operation will inevitably bring a series of impacts on mobile communications, of which the biggest impact is the Doppler effect on the uplink and downlink communication links. 5G New Radio (NR) communication still uses the multi-carrier technology based on Orthogonal Frequency Division Multiplexing (OFDM), and the Doppler effect will cause interference between OFDM sub-carriers, which is harmful to NR. The application of high-speed rail has a bad influence.

In related communication systems, one of the optimization schemes based on the high-speed rail network is to optimize the receiver algorithm on the terminal side. That is, the terminal assumes that the base station side is not optimized, and the terminal estimates the Doppler frequency offset value based on the downlink signal and uses the Doppler characteristics to do it. Compensate and use more complex channel estimation algorithms to improve receiver performance. The other is that the base station side uses frequency offset pre-compensation, that is, the base station estimates the Doppler frequency offset of the wireless channel based on the uplink signal sent by the terminal, and calculates the size of the downlink frequency offset based on a certain assumption and performs pre-compensation. The pre-compensation value and the downlink Doppler frequency offset cancel each other out, and the downlink signal received by the terminal will no longer be affected by Doppler.

In related technologies, base station equipment and terminal equipment are optimized independently, and there is no reasonable match between the two, resulting in limited improvement in actual network performance.

Summary of the invention

The purpose of the embodiments of the present invention is to provide a frequency offset pre-compensation indication method, terminal equipment, and network equipment, so that the frequency offset pre-compensation can improve network performance.

In the first aspect, a frequency offset pre-compensation indication method is provided, which is applied to a terminal device. The method includes: sending uplink signaling to the network device to instruct the terminal device whether to perform frequency offset pre-compensation when sending an uplink signal.

In a second aspect, a frequency offset pre-compensation method is provided, which is applied to a terminal device. The method includes: performing or not performing frequency offset pre-compensation when sending an uplink signal according to an indication of a preset signaling sent by a network device.

In a third aspect, a frequency offset pre-compensation method is provided, which is applied to a network device, and the method includes: performing frequency offset pre-compensation on the frequency of a downlink signal sent to the terminal device based on an indication of an uplink signaling sent by the terminal device, Wherein, the uplink signaling indicates whether the terminal equipment performs frequency offset pre-compensation when sending uplink signals.

In a fourth aspect, a frequency offset pre-compensation method is provided, which is applied to a network device, and the method includes: sending a notification signaling to a terminal device, wherein the notification signaling indicates whether the terminal device sends an uplink signal Perform frequency offset pre-compensation; based on whether the terminal device performs frequency offset pre-compensation when sending uplink signals, perform frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device.

In a fifth aspect, a terminal device is provided. The terminal device includes: a first sending module, configured to send uplink signaling to a network device to instruct the terminal device whether to perform frequency offset precompensation when sending an uplink signal.

In a sixth aspect, a terminal device is provided. The terminal device includes: a second sending module configured to perform or not perform frequency offset precompensation when sending an uplink signal according to an indication of a preset signaling sent by a network device.

In a seventh aspect, a network device is provided, including: a first compensation module configured to perform frequency offset pre-compensation on the frequency of a downlink signal sent to the terminal device based on an indication of an uplink signaling sent by the terminal device, wherein the The uplink signaling indicates whether the terminal equipment performs frequency offset pre-compensation when sending uplink signals.

In an eighth aspect, a network device is provided, including: a third sending module, configured to send notification signaling to a terminal device, wherein the notification signaling indicates whether the terminal device performs frequency offset pre-processing when sending uplink signals. Compensation; The second compensation module is used to perform frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device based on whether the terminal device performs frequency offset pre-compensation when sending the uplink signal.

In a ninth aspect, a terminal device is provided. The terminal device includes a processor, a memory, and a computer program stored on the memory and running on the processor. When the computer program is executed by the processor, The steps of the method as described in the first aspect or the second aspect are implemented.

In a tenth aspect, a network device is provided, including: a memory, a processor, and a computer program that is stored on the memory and can run on the processor. When the computer program is executed by the processor, the following The steps of the method described in the third aspect or the fourth aspect.

In an eleventh aspect, a computer-readable storage medium is provided, and a computer program is stored on the computer-readable storage medium. The steps of the method described in the fourth aspect.

In the embodiment of the present invention, the terminal device sends uplink signaling to the network device to instruct the terminal device whether to perform frequency offset precompensation when sending the uplink signal, or determine whether to perform frequency offset precompensation when sending the uplink signal according to the notification signaling sent by the network device. Frequency offset pre-compensation, so that the network equipment can know whether the terminal device performs frequency offset pre-compensation when sending the uplink signal, and then enables the network device to perform frequency offset pre-compensation according to whether the terminal device sends the uplink signal. Frequency offset pre-compensation is performed on the downlink signal to achieve frequency offset pre-compensation to improve network performance.

Description of the drawings

FIG. 1 is a schematic flowchart of a frequency offset pre-compensation indication method according to an embodiment of the present invention;

2 is a schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention;

FIG. 3 is another schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of another flow chart of a frequency offset pre-compensation method provided by an embodiment of the present invention;

Figure 5 is a schematic diagram of a scenario applied by an embodiment of the present invention;

Fig. 6 is a schematic diagram of another scenario applied by an embodiment of the present invention;

FIG. 7 is another schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of another terminal device according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a network device provided by an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of another network device provided by an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

Fig. 13 is a schematic structural diagram of a network device provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The technical solution of the present invention can be applied to various communication systems, such as: Global System of Mobile Communication (GSM), Code Division Multiple Access (CDMA) systems, and Wideband Code Division Multiple Access (GSM) systems. Wideband Code Division Multiple Access (WCDMA), General Packet Radio Service (GPRS), Long Term Evolution (LTE)/Long Term Evolution Advanced (LTE-A), NR, etc.

User Equipment (UE), also referred to as terminal equipment, mobile terminal (Mobile Terminal), mobile user equipment, etc., can communicate with one or more core networks via the Radio Access Network (RAN) For communication, user equipment can be mobile terminals, such as mobile phones (or "cellular" phones) and computers with mobile terminals. For example, they can be portable, pocket-sized, handheld, computer-built or vehicle-mounted mobile devices. Exchange language and/or data with the wireless access network.

The base station can be a base transceiver station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB) in WCDMA, or an evolved base station (eNB or e-NodeB, evolutional Node) in LTE. B) and 5G base station (gNB), the present invention is not limited, but for the convenience of description, the following embodiments take gNB as an example for description.

The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic flowchart of a frequency offset pre-compensation indication method provided in an embodiment of the present invention, and the method 100 may be executed by a terminal device. In other words, the method can be executed by software or hardware installed on the terminal device. As shown in Figure 1, the method may include the following steps.

S110: Send uplink signaling to the network device to instruct the terminal device whether to perform frequency offset pre-compensation when sending the uplink signal.

In the embodiment of the present invention, the terminal equipment can optimize the receiver algorithm according to its own settings, estimate the frequency offset value of the downlink signal, and perform frequency offset pre-compensation for the uplink signal. In order to enable the network side to know whether the UE has performed frequency offset precompensation when sending uplink signals, the UE sends uplink signaling to the network side to indicate whether the UE has performed frequency offset precompensation when sending uplink signals.

In the embodiment of the present invention, the terminal equipment sends uplink signaling to the network equipment to instruct the terminal equipment whether to perform frequency offset precompensation when sending uplink signals, so that the network equipment can learn whether the terminal equipment performs frequency offset precompensation when sending uplink signals. Compensation in turn enables the network equipment to perform frequency offset pre-compensation on the downlink signal sent to the terminal device according to whether the terminal device sends the uplink signal or not to perform frequency offset pre-compensation, so that the frequency offset pre-compensation can improve the network performance.

In a possible implementation, the UE may carry an uplink media access control layer (Media Access Control, MAC) control element (Control Element, CE) that indicates whether to perform frequency offset pre-compensation when the terminal device sends an uplink signal. Instructions. For example, the UE may carry 1-bit information in the uplink MAC CE to inform the UE whether frequency offset compensation has been performed.

In a possible implementation, when the uplink signaling indicates that the UE does not perform frequency offset pre-compensation when transmitting the uplink signal, the frequency offset estimated by the network equipment (such as the base station) is only the Doppler frequency offset; when the UE is instructed to The frequency offset pre-compensation is done when the uplink signal is sent, and the frequency offset estimated by the network equipment may be twice the Doppler frequency offset.

In a possible implementation, if the terminal device performs frequency offset pre-compensation when sending uplink signals, the terminal device can estimate the frequency offset value for frequency offset pre-compensation based on the detected preset downlink signal , Performing frequency offset pre-compensation on the transmitted uplink signal according to the frequency offset value.

In a possible implementation manner, if the terminal device does not perform frequency offset pre-compensation when sending the uplink signal, the terminal device uses the preset center frequency to send the uplink signal. The preset center frequency refers to the center frequency currently used by the network system, which is specifically related to the currently applied network system, and is not limited in this embodiment.

In a possible implementation manner, the preset downlink signal may be a tracking pilot on a pre-configured target tracking pilot resource. In practical applications, the network side can pre-configure the tracking pilot resource. The UE can estimate the frequency offset value by detecting the tracking pilot transmitted on the tracking pilot resource, and compensate the frequency of the transmitted uplink signal according to the frequency offset value. . For example, assuming that the center carrier frequency of the UE is F0, the UE detects the tracking pilot, and the estimated frequency offset value is Δf, then the UE sends the uplink signal at F0+Δf.

In a possible implementation manner, the network device may be pre-configured with at least two tracking pilot resources. Then, before the terminal device estimates the frequency offset value for frequency offset pre-compensation according to the detected preset downlink signal, The UE may determine the target tracking pilot resource for estimating the frequency offset value according to the signaling notification sent by the network device or an agreement with the network device in advance.

In a possible implementation manner, determining the target tracking pilot resource for estimating the frequency offset value may include one of the following: according to the indication of the radio resource control (RRC) configuration signaling sent by the network device, determining the Target tracking pilot resource; according to an agreement with the network device in advance, based on the transmission configuration indication (TCI) and/or quasi co-location (QCL) of each of the at least two tracking pilot resources, determining The target tracks the pilot frequency resource.

In a possible implementation manner, the network device may carry the identification information of the target tracking pilot resource in the RRC configuration signaling, or may also indicate the target tracking pilot resource through the TCI and/or QCL in the RRC configuration signaling. For example, multiple tracking pilot resources configured (for example, identification information of each tracking pilot resource) may be indicated in one or more signaling fields in RRC configuration signaling, and then carried as a target in another signaling field The identification information of the tracking pilot resource of the tracking pilot resource. Alternatively, the multiple tracking pilot resources configured are indicated in one or more signaling fields in the RRC configuration signaling, and then the target tracking pilot resource is indicated in the TCI and/or QCL domains of the RRC configuration signaling. For example, two tracking pilot resources RS1 and RS2 are configured in the RRC configuration signaling, and the network instructs the UE to use RS1 as the target tracking pilot resource, and it can carry a 2bit bitmap in TCI and/or QCL: 01, indicating configuration The second tracking pilot resource, that is, RS2 is the target tracking pilot resource.

In a possible implementation manner, determining the target tracking pilot resource based on the TCI and/or QCL of each tracking pilot resource in the at least two tracking pilot resources may include: The target tracking pilot resource is selected from the pilot resources, wherein the TCI and/or QCL of the target tracking pilot resource is the same as one of the following:

The TCI and/or QCI configured in the Downlink Control Information (DCI) to receive the Physical Downlink Shared Channel (PDSCH);

The TCI and/or QCI configured in the MAC CE for receiving the Physical Downlink Control Channel (PDCCH);

The TCI and/or QCI of the reference signal (RS) indicated by the spatial relationship information signaling of the uplink sounding reference signal (SRS) resource; that is, the network side sends the reference signal indicated by the uplink SRS spatial relationship information (spatial relation info) signaling TCI and/or QCI, where the SRS resource is indicated by the SRI configured in the DCI domain for sending the PUSCH, that is, the SRI configured in the DCI domain for the user to send the PUSCH indicates the SRS resource information. For example, the reference signal may be a tracking pilot.

The TCI and/or QCI configured by the RRC of the uplink SRS resource. Wherein, the SRS resource can be indicated by the SRI configured in the DCI domain for sending PUSCH.

FIG. 2 is a schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention. The method 200 may be executed by a terminal device. In other words, the method can be executed by software or hardware installed on the terminal device. As shown in Figure 2, the method may include the following steps.

S210: Receive notification signaling sent by a network device.

Wherein, the notification signaling indicates whether the terminal equipment performs frequency offset pre-compensation when sending uplink signals.

In the embodiment of the present invention, the network device (for example, the base station) can directly instruct the UE whether to perform frequency offset pre-compensation when sending uplink signals through notification signaling.

In a possible implementation manner, the notification signaling includes: broadcast signaling sent by the network device. For example, the base station may configure a broadcast signaling to indicate that the base station has enabled the frequency offset pre-compensation function. Therefore, after receiving the broadcast signaling, the terminal device determines not to perform frequency offset pre-compensation on the transmitted uplink signal.

In another possible implementation manner, the notification signaling includes: exclusive signaling sent by the network device to the terminal device. For example, the network device informs the terminal device whether to perform frequency offset pre-compensation when sending uplink signals through RRC configuration signaling.

In a possible implementation manner, before S210, the method may further include: reporting capability information, where the capability information includes indication information indicating whether the terminal device supports frequency offset precompensation. In this possible implementation manner, the network device may determine whether to allow the terminal device to perform frequency offset pre-compensation when sending the uplink signal according to the capability information reported by the terminal device. For example, for a base station located near the high-speed rail, which has the frequency offset pre-compensation capability enabled, when the base station receives the capability information reported by the terminal equipment, if it instructs the terminal equipment to support frequency offset pre-compensation, the base station can notify the terminal The device sends the above-mentioned exclusive signaling to notify the terminal device not to perform frequency offset pre-compensation when sending uplink signals.

S212: The terminal equipment performs or does not perform frequency offset pre-compensation when sending uplink signals according to the indication of the notification signaling.

In the embodiment of the present invention, the terminal equipment performs or does not perform frequency offset pre-compensation when sending uplink signals according to the indication of the notification signaling. For example, if the notification signaling instructs the terminal device to perform frequency offset pre-compensation when sending an uplink signal, the terminal device estimates the frequency offset value for frequency offset pre-compensation according to the detected preset downlink signal, and according to the frequency offset value Perform frequency offset pre-compensation on the transmitted uplink signal (assuming that the terminal has the capability of frequency offset pre-compensation). If the notification signaling instructs the terminal device not to perform frequency offset pre-compensation when sending an uplink signal, the terminal device does not perform frequency offset pre-compensation when sending an uplink signal, for example, sends the uplink signal at a preset center frequency.

In a possible implementation manner, as in method 100, the foregoing preset downlink signal includes: a tracking pilot on a pre-configured target tracking pilot resource.

In a possible implementation, if the network device is pre-configured with at least two tracking pilot resources, before the terminal device estimates the frequency offset value for frequency offset pre-compensation according to the detected preset downlink signal Determine the target tracking pilot resource used to estimate the frequency offset value according to the signaling notification sent by the network device or an agreement with the network device in advance.

TCI and/or QCI configured to receive PDSCH in Downlink Control Information (DCI);

The TCI and/or QCI configured in the MAC CE to receive the PDCCH;

In the embodiment of the present invention, the terminal device performs or does not perform frequency offset precompensation when sending uplink signals according to the instructions of the notification signaling sent by the network device, so that the network device can learn whether the terminal device performs frequency offset when sending uplink signals. Offset pre-compensation, in turn, enables network equipment to perform frequency offset pre-compensation on the downlink signal sent to the terminal device according to whether the terminal device performs frequency offset pre-compensation when sending uplink signals, so as to achieve frequency offset pre-compensation to improve network performance.

FIG. 3 is another schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention. The method 300 may be executed by a network device. In other words, the method can be executed by software or hardware installed on a network device. As shown in Figure 3, the method may include the following steps.

S310: Perform frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device based on the indication of the preset signaling.

Wherein, the preset signaling indicates whether to perform frequency offset pre-compensation when the terminal device sends an uplink signal.

In the embodiment of the present invention, the network device performs frequency offset precompensation on the downlink signal sent to the terminal device according to whether the terminal device performs frequency offset precompensation when sending the uplink signal, so that the frequency offset precompensation improves the network performance.

In a possible implementation manner, the preset signaling includes: uplink signaling of the terminal device. The uplink signaling may be the uplink signaling described in the method 100. For details, please refer to the description in the foregoing method 100. That is, in this possible implementation manner, the terminal device informs the network device whether or not the terminal device performs frequency offset pre-compensation when sending an uplink signal.

In another possible implementation manner, the preset signaling includes: notification signaling sent by the network device. The notification signaling may be the notification signaling described in the method 200, and may refer to the description in the foregoing method 200 for details. That is, in this possible implementation manner, the network device determines whether the terminal device performs frequency offset pre-compensation when sending an uplink signal, and notifies the terminal device.

In a possible implementation manner, performing frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal equipment based on the indication of the preset signaling may include: judging the terminal equipment according to the indication of the preset signaling Whether the transmitted uplink signal has been pre-compensated for frequency offset; for different judgment results, different compensation values are used to compensate the frequency of the downlink signal transmitted to the terminal device. For example, if the terminal equipment performs frequency offset compensation when sending uplink signals, the compensation value estimated by the base station may be twice the Doppler frequency offset; if the terminal does not perform frequency offset compensation when sending uplink signals, the compensation estimated by the base station The value is the Doppler frequency deviation.

In a possible implementation, the network device can estimate the frequency offset based on the uplink received signal of the terminal device to obtain the Doppler frequency offset, and then determine the specific compensation according to whether the terminal device performs frequency offset pre-compensation when sending the uplink signal value.

In a possible implementation manner, when the network device performs frequency offset pre-compensation on the downlink signal, the adopted manner includes, but is not limited to, implementation through adjustment of the crystal oscillator or implementation through baseband algorithm processing.

FIG. 4 is a schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention. The method 400 may be executed by a terminal device and a network device. In other words, the method can be executed by software or hardware installed on the terminal device and the network device. As shown in Figure 4, the method may include the following steps.

S410: The terminal device sends uplink signaling to the network device to instruct the terminal device whether to perform frequency offset pre-compensation when sending the uplink signal.

This step is the same as S110. For details, refer to the description in the above method 100.

S420: The network device performs frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device based on the indication of the received uplink signaling.

In the embodiment of the present invention, the network device may be a Transmit-Receive Point (TRP) on the network side, for example, it may be a base station or different antenna groups of the base station.

For example, the center carrier frequency of the two transceiver nodes TRP1 and TRP2 is F0, and the UE center carrier frequency is also F0. The Doppler frequency deviation caused by TRP1 is Δf0; and the Doppler frequency deviation caused by TRP2 is Δf1.

When the terminal equipment sends an uplink signal without precompensation for frequency offset, as shown in Figure 5, the uplink signals received by the two TRPs are F0+Δf0 and F0+Δf1, respectively. The two TRPs use the uplink pilot signals of the terminal equipment, such as DMRS or SRS, to estimate Doppler frequency offsets Δf0 and Δf1, respectively. Since the uplink signaling sent by the terminal equipment instructs the terminal equipment not to perform frequency offset precompensation when sending the uplink signaling, when the downlink signal is sent again, TRP1 frequency offset precompensation-Δf0; TRP1 frequency offset precompensation-Δf1.

The signal of TRP1 received by the terminal equipment is F0-Δf0+Δf0=F0;

The signal received by the terminal equipment TRP2 is F0-Δf1+Δf1=F0.

Among them, the downlink signal can include PDSCH and tracking pilot, that is, to eliminate Doppler influence on both PDSCH and tracking pilot. At this time, the two TRPs can be configured with the same tracking pilot resource, which is equivalent to only being configured with A tracking pilot resource.

When the terminal equipment sends uplink signals, it performs frequency offset pre-compensation, and configures two tracking pilot resources to send tracking reference signals (Tracking Reference Signal, TRS). The terminal equipment uses the downlink frequency offset compensation estimated by TRS1 based on the base station signaling instructions. . As shown in Figure 6, the uplink signals received by the two TRPs are F0+Δf0+Δf0 and F0+Δf0+Δf1, respectively. And two TRPs (actually two antennas of the same base station) use uplink pilot signals, such as DMRS or SRS, to estimate Doppler frequency offsets as 2Δf0 and Δf0+Δf1 respectively. The terminal equipment informs it through uplink signaling that it has done frequency offset pre-compensation when sending uplink signals. Since there is an ideal loop between the two TRPs (the baseband can obtain the information of the two sets of antennas), the equations can be solved jointly to obtain Δf0 and Δf1, respectively .

When sending the downlink signal again, TRP1 frequency offset pre-compensation -Δf0; TRP1 frequency offset pre-compensation -Δf1.

The signal of TRP1 received by the terminal equipment is F0-Δf0+Δf0=F0;

The signal received by the terminal equipment TRP2 is F0-Δf1+Δf1=F0.

Among them, the downlink signal may be PDSCH, which eliminates Doppler influence. However, in order to enable the terminal equipment to continue to estimate the downlink Doppler frequency offset, the tracking pilot TRS does not perform frequency offset pre-compensation.

FIG. 7 is a schematic flowchart of a frequency offset pre-compensation method provided by an embodiment of the present invention. The method 700 may be executed by a terminal device and a network device. In other words, the method can be executed by software or hardware installed on the terminal device and the network device. As shown in Figure 7, the method may include the following steps.

S720: The network device sends notification signaling to the terminal device, where the notification signaling indicates whether the terminal device performs frequency offset precompensation when sending an uplink signal.

S710: The terminal device receives the notification information.

This step is the same as S210. For details, refer to the description in the above method 200.

S712: The terminal device performs or does not perform frequency offset pre-compensation when sending uplink signals according to the indication of the notification signaling.

This step is the same as S212. For details, refer to the description in the above method 200.

S722: Perform frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device based on the indication of the notification signaling.

In the embodiment of the present invention, the network device may be a Transmit-Receive Point (TRP) on the network side. For example, it may be a base station or different antenna groups of the base station.

For example, in Figure 5, if the notification signaling received by the terminal equipment indicates that frequency offset pre-compensation is not performed when sending uplink signals, the uplink signals received by the two TRPs are F0+Δf0 and F0+Δf1, respectively. The two TRPs use the uplink pilot signals of the terminal equipment, such as DMRS or SRS, to estimate Doppler frequency offsets Δf0 and Δf1, respectively. Since the uplink signaling sent by the terminal equipment instructs the terminal equipment not to perform frequency offset precompensation when sending the uplink signaling, when the downlink signal is sent again, TRP1 frequency offset precompensation-Δf0; TRP1 frequency offset precompensation-Δf1.

The signal of TRP1 received by the terminal equipment is F0-Δf0+Δf0=F0;

The signal received by the terminal equipment TRP2 is F0-Δf1+Δf1=F0.

In Figure 6, when the notification signaling received by the terminal equipment indicates frequency offset pre-compensation when sending uplink signals, and two tracking pilot resources are configured to transmit tracking reference signals (Tracking Reference Signal, TRS), the terminal equipment Based on the base station signaling instruction to use TRS1 estimated downlink frequency offset compensation. Then the uplink signals received by the two TRPs are F0+Δf0+Δf0 and F0+Δf0+Δf1, respectively. And two TRPs (actually two antennas of the same base station) use uplink pilot signals, such as DMRS or SRS, to estimate Doppler frequency offsets as 2Δf0 and Δf0+Δf1 respectively. Since there is an ideal loop between the two TRPs (the baseband can obtain the information of the two sets of antennas), the equations can be solved jointly to obtain Δf0 and Δf1, respectively.

The signal of TRP1 received by the terminal equipment is F0-Δf0+Δf0=F0;

The signal received by the terminal equipment TRP2 is F0-Δf1+Δf1=F0.

The embodiment of the present invention also provides a method for determining a transmission scheme.

In the embodiment of the present invention, when the TCI field in the DCI indicates two TCI states, and the network side sends a preset signaling to the UE, the preset signaling configuration or indication (RRC, MAC CE, or DCI) is a scheduled transmission Scheme (such as SFN, SDM, etc.), the UE receives the PDSCH according to the predetermined transmission scheme. Or when there is no such signaling indication (for example, no high-level signaling RepSchemeEnabler is configured), the UE receives the PDSCH according to the pre-agreed reception scheme.

If SFN has multiple transmission schemes, for example, multiple DMRS ports indicated by DCI correspond to multiple CDM groups, and DMRS ports in each CDM group correspond to one TCI state; or each DMRS port corresponds to multiple TCI states, etc., you can also use The above-mentioned preset signaling is used to distinguish each TCI state.

FIG. 8 is a schematic structural diagram of a terminal device provided by an embodiment of the present invention. As shown in FIG. 8, the terminal device 800 includes: a first sending module 810, configured to send uplink signaling to a network device to instruct the terminal device Whether to perform frequency offset pre-compensation when sending uplink signals.

In a possible implementation manner, the first sending module 810 sending uplink signaling to the network device includes: carrying indication information in the uplink MAC CE that indicates whether the terminal device performs frequency offset precompensation when sending the uplink signal.

In a possible implementation manner, sending the uplink signal by the first sending module 810 includes: if frequency offset pre-compensation is performed when sending the uplink signal, the terminal device estimates that the frequency offset is pre-compensated according to the detected preset downlink signal. For the compensated frequency offset value, perform frequency offset pre-compensation on the transmitted uplink signal according to the frequency offset value; if the frequency offset pre-compensation is not performed when transmitting the uplink signal, the terminal device uses the preset center frequency to transmit the uplink signal .

In a possible implementation manner, the preset downlink signal includes: a tracking pilot on a pre-configured target tracking pilot resource.

In a possible implementation manner, the terminal device further includes: a first determining module, configured to, before obtaining the frequency offset value for frequency offset pre-compensation, if the network device is pre-configured with at least two tracking pilots Resource, the target tracking pilot resource used for estimating the frequency offset value is determined according to the signaling notification sent by the network device or an agreement with the network device in advance.

In a possible implementation manner, the first determining module determines the target tracking pilot resource for estimating the frequency offset value, including one of the following: determining the target tracking pilot resource according to the indication of the radio resource control RRC configuration signaling sent by the network device The target tracking pilot resource; according to an agreement with the network device in advance, the target tracking pilot resource is determined based on the TCI and/or QCL of each of the at least two tracking pilot resources.

In a possible implementation manner, the RRC configuration signaling carries identification information of the target tracking pilot resource, or the TCI and/or QCL in the RRC configuration signaling indicate the target tracking pilot resource.

In a possible implementation, determining the target tracking pilot resource based on the transmission configuration indication TCI and/or quasi-co-located QCL of each tracking pilot resource in the at least two tracking pilot resources includes: The target tracking pilot resource is selected from the at least two tracking pilot resources, wherein the TCI and/or QCL of the target tracking pilot resource is the same as one of the following: the TCI and the TCI configured in the DCI for receiving PDSCH /Or QCI; MAC CE configured to receive the TCI and/or QCI of the physical downlink control channel PDCCH; TCI and/or QCI of the reference signal RS indicated by the spatial relationship information signaling of the uplink sounding reference signal SRS resource; uplink SRS The TCI and/or QCI of the RRC configuration of the resource.

The terminal device provided by the embodiment of the present invention can implement each process implemented by the terminal device in the method embodiments of FIG. 1, FIG. 3, and FIG.

FIG. 9 is a schematic structural diagram of another terminal device provided by an embodiment of the present invention. As shown in FIG. 9, the terminal device 900 includes: a second sending module 910, which is configured to: Do or not do frequency offset pre-compensation when sending uplink signals.

In a possible implementation manner, the notification signaling includes: broadcast signaling sent by the network device, or dedicated signaling sent by the network device to the terminal device.

In a possible implementation manner, it further includes: a reporting module for reporting capability information, where the capability information includes indication information indicating whether the terminal device supports frequency offset pre-compensation.

In a possible implementation manner, sending the uplink signal by the second sending module 910 includes: if performing frequency offset pre-compensation when sending the uplink signal, the terminal device estimates that the frequency offset pre-compensation is performed according to the detected preset downlink signal. For the compensated frequency offset value, perform frequency offset pre-compensation on the transmitted uplink signal according to the frequency offset value; if the frequency offset pre-compensation is not performed when transmitting the uplink signal, the terminal device uses the preset center frequency to transmit the uplink signal .

In a possible implementation manner, it further includes: a second determining module, configured to, before the frequency offset value for frequency offset pre-compensation is obtained by estimating, if the network device is pre-configured with at least two tracking pilot resources, The signaling notification sent by the network device, or an agreement with the network device in advance, determines the target tracking pilot resource used to estimate the frequency offset value.

In a possible implementation manner, the second determining module determining the target tracking pilot resource used to estimate the frequency offset value includes one of the following: determining the target tracking pilot resource according to the indication of the radio resource control RRC configuration signaling sent by the network device The target tracking pilot resource; according to an agreement with the network device in advance, the target is determined based on the transmission configuration indication TCI and/or quasi-colocation QCL of each of the at least two tracking pilot resources Track pilot resources.

In a possible implementation, determining the target tracking pilot resource based on the transmission configuration indication TCI and/or quasi-co-located QCL of each tracking pilot resource in the at least two tracking pilot resources includes: The target tracking pilot resource is selected from the at least two tracking pilot resources, wherein the TCI and/or QCL of the target tracking pilot resource is the same as one of the following: the TCI and the TCI configured in the DCI for receiving PDSCH /Or QCI; TCI and/or QCI configured in MAC CE to receive PDCCH; TCI and/or QCI of reference signal RS indicated by spatial relationship information signaling of uplink SRS resources; TCI and/or QCI configured by RRC of uplink SRS resources / Or QCI.

The terminal device provided by the embodiment of the present invention can implement each process implemented by the terminal device in the method embodiments of FIG. 2, FIG. 3, and FIG.

FIG. 10 is a schematic structural diagram of a network device provided by an embodiment of the present invention. As shown in FIG. 10, the network device 1000 includes: a first compensation module 1010, which is configured to send information based on an uplink signaling instruction sent by a terminal device. Perform frequency offset pre-compensation on the frequency of the downlink signal of the terminal device, wherein the uplink signaling indicates whether the terminal device performs frequency offset pre-compensation when sending the uplink signal.

In a possible implementation manner, the first compensation module 1010 performs frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device, including: if the uplink signal sent by the terminal device has been pre-compensated for frequency offset, using the second A compensation value compensates for the frequency of the downlink signal sent to the terminal device; if the uplink signal sent by the terminal device is not pre-compensated for frequency offset, the second compensation value is used for the downlink signal sent to the terminal device The first compensation value is different from the second compensation value.

FIG. 11 is a schematic structural diagram of another network device provided according to an embodiment of the present invention. As shown in FIG. 11, the network device 1100 includes: a third sending module 1110, configured to send notification signaling to a terminal device. The notification signaling indicates whether the terminal device performs frequency offset pre-compensation when sending uplink signals; the second compensation module 1120 is configured to perform frequency offset pre-compensation based on whether the terminal device sends uplink signals to the terminal. The frequency of the device's downlink signal is pre-compensated for frequency offset.

In a possible implementation manner, the notification signaling includes broadcast signaling or dedicated signaling sent to the terminal device.

In a possible implementation manner, the second compensation module 1120 performs frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device, including: if the uplink signal sent by the terminal device has been pre-compensated for frequency offset, the second compensation module 1120 A compensation value compensates for the frequency of the downlink signal sent to the terminal device; if the uplink signal sent by the terminal device is not pre-compensated for frequency offset, the second compensation value is used for the downlink signal sent to the terminal device The first compensation value is different from the second compensation value.

The network device provided by the embodiment of the present invention can implement each process implemented by the network device in the foregoing method embodiments, and achieve the same effect. In order to avoid repetition, details are not described herein again.

Fig. 12 is a block diagram of a terminal device according to another embodiment of the present invention. The terminal device 1200 shown in FIG. 12 includes: at least one processor 1201, a memory 1202, at least one network interface 1204, and a user interface 1203. The various components in the terminal device 1200 are coupled together through the bus system 1205. It can be understood that the bus system 1205 is used to implement connection and communication between these components. In addition to the data bus, the bus system 1205 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clear description, various buses are marked as the bus system 1205 in FIG. 12.

The user interface 1203 may include a display, a keyboard, or a pointing device (for example, a mouse, a trackball (trackball), a touch panel, or a touch screen, etc.).

It can be understood that the memory 1202 in the embodiment of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synchronous Link Dynamic Random Access Memory (Synch Link DRAM, SLDRAM) ) And Direct Rambus RAM (DRRAM). The memory 1202 of the system and method described in the embodiment of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

In some embodiments, the memory 1202 stores the following elements, executable modules or data structures, or their subsets, or their extended sets: operating system 12021 and application programs 12022.

Among them, the operating system 12021 includes various system programs, such as a framework layer, a core library layer, and a driver layer, which are used to implement various basic services and process hardware-based tasks. The application program 12022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., which are used to implement various application services. The program for implementing the method of the embodiment of the present invention may be included in the application program 12022.

In the embodiment of the present invention, the terminal device 1200 further includes: a computer program stored in the memory 1202 and capable of running on the processor 1201. When the computer program is executed by the processor 1201, the following steps are implemented: sending uplink signaling to the network device, Instruct the terminal equipment whether to perform frequency offset pre-compensation when sending uplink signals; or, according to the instructions of the notification signaling sent by the network equipment, do or not perform frequency offset pre-compensation when sending uplink signals.

The method disclosed in the foregoing embodiment of the present invention may be applied to the processor 1201 or implemented by the processor 1201. The processor 1201 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 1201 or instructions in the form of software. The aforementioned processor 1201 may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present invention may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module may be located in a computer-readable storage medium that is mature in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The computer-readable storage medium is located in the memory 1202, and the processor 1201 reads information in the memory 1202, and completes the steps of the foregoing method in combination with its hardware. Specifically, a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 1201, each step in the above method 100 or method 200 is implemented.

It can be understood that the embodiments described in the embodiments of the present invention may be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application specific integrated circuits (ASIC), digital signal processor (Digital Signal Processing, DSP), digital signal processing equipment (DSP Device, DSPD), programmable Logic device (Programmable Logic Device, PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processors, controllers, microcontrollers, microprocessors, and others for performing the functions described in the present invention Electronic unit or its combination.

For software implementation, the technology described in the embodiments of the present invention can be implemented by modules (for example, procedures, functions, etc.) that execute the functions described in the embodiments of the present invention. The software codes can be stored in the memory and executed by the processor. The memory can be implemented in the processor or external to the processor.

The terminal device 1200 can implement each process implemented by the terminal device in the foregoing method 100 or method 200, and in order to avoid repetition, details are not described herein again.

Please refer to FIG. 13. FIG. 13 is a structural diagram of a network device applied in an embodiment of the present invention, which can implement various details in the method 300 and achieve the same effect. As shown in FIG. 13, the network device 1300 includes: a processor 1301, a transceiver 1302, a memory 1303, a user interface 1304, and a bus interface, where:

In the embodiment of the present invention, the network device 1300 further includes: a computer program that is stored in the memory 1303 and can run on the processor 1301, and the computer program is executed by the processor 1301 to implement the following steps:

Perform frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device based on the indication of the uplink signaling sent by the terminal device, wherein the uplink signaling indicates whether the terminal device performs frequency offset pre-compensation when sending the uplink signal ;or

Send notification signaling to the terminal device, where the notification signaling indicates whether the terminal device performs frequency offset precompensation when sending uplink signals; based on whether the terminal device performs frequency offset precompensation when sending uplink signals, The frequency of the downlink signal sent to the terminal device is pre-compensated for frequency offset.

In FIG. 13, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1301 and various circuits of the memory represented by the memory 1303 are linked together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, no further descriptions are provided herein. The bus interface provides the interface. The transceiver 1302 may be a plurality of elements, that is, including a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium. For different user equipment, the user interface 1304 may also be an interface capable of connecting externally and internally with the required equipment. The connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 1301 is responsible for managing the bus architecture and general processing, and the memory 1303 can store data used by the processor 1301 when performing operations.

The network device 1300 can implement each process implemented by the network device in the foregoing method 300,

method

400, or 700, and achieve the same effect. To avoid repetition, details are not described herein again.

The embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned method 100, method 200, method 300, method 400, or method 700 are implemented. Each process of the example, and can achieve the same technical effect, in order to avoid repetition, I will not repeat them here. Wherein, the computer-readable storage medium, such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk, or optical disk, etc.

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements that are not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or device that includes the element.

Through the description of the above implementation manners, those skilled in the art can clearly understand that the above-mentioned embodiment method can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is better.的实施方式。 Based on this understanding, the technical solution of the present invention essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the method described in each embodiment of the present invention.

The embodiments of the present invention are described above with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art are Under the enlightenment of the present invention, many forms can be made without departing from the purpose of the present invention and the scope of protection of the claims, and they all fall within the protection of the present invention.

Claims

A frequency offset pre-compensation indication method, applied to terminal equipment, and the method includes:

Send uplink signaling to the network device to instruct the terminal device whether to perform frequency offset pre-compensation when sending the uplink signal.
The method according to claim 1, wherein sending uplink signaling to the network device comprises: carrying an uplink media access control layer MAC control unit CE indicating whether the terminal device performs frequency offset precompensation when sending uplink signals Instructions.
A frequency offset pre-compensation method, applied to a terminal device, the method including:

According to the instructions of the notification signaling sent by the network equipment, do or not perform frequency offset pre-compensation when sending the uplink signal.
The method according to claim 3, wherein the notification signaling comprises: broadcast signaling sent by the network device or dedicated signaling sent by the network device to the terminal device.
The method according to claim 3, wherein, before performing or not performing frequency offset pre-compensation when sending the uplink signal according to the indication of the notification signaling sent by the network device, the method further comprises:

Reporting capability information, where the capability information includes indication information indicating whether the terminal device supports frequency offset pre-compensation.
The method according to any one of claims 1 to 5, wherein sending an uplink signal comprises:

If frequency offset pre-compensation is performed when transmitting an uplink signal, the terminal equipment estimates the frequency offset value for frequency offset pre-compensation according to the detected preset downlink signal, and performs frequency offset pre-compensation on the transmitted uplink signal according to the frequency offset value. Frequency offset pre-compensation;

If the frequency offset pre-compensation is not performed when sending the uplink signal, the terminal device uses the preset center frequency to send the uplink signal.
7. The method of claim 6, wherein the preset downlink signal comprises: a tracking pilot on a pre-configured target tracking pilot resource.
The method according to claim 7, wherein, before the terminal device estimates the frequency offset value for frequency offset pre-compensation according to the detected preset downlink signal, the method further comprises:

If the network device is pre-configured with at least two tracking pilot resources, the target tracking pilot used for estimating the frequency offset value is determined according to the signaling notification sent by the network device or an agreement with the network device in advance resource.
The method according to claim 8, wherein determining the target tracking pilot resource used for estimating the frequency offset value comprises one of the following:

Determine the target tracking pilot resource according to the indication of the radio resource control RRC configuration signaling sent by the network device;

According to an agreement with the network device in advance, the target tracking pilot resource is determined based on the transmission configuration indication TCI and/or quasi-co-located QCL of each of the at least two tracking pilot resources.
The method according to claim 9, wherein the RRC configuration signaling carries identification information of the target tracking pilot resource, or the TCI and/or QCL in the RRC configuration signaling indicates the target Track pilot resources.
The method according to claim 9, wherein determining the target tracking pilot resource based on the transmission configuration indication TCI and/or quasi-co-located QCL of each of the at least two tracking pilot resources includes : Select the target tracking pilot resource from the at least two tracking pilot resources, where the TCI and/or QCL of the target tracking pilot resource is the same as one of the following:

TCI and/or QCI configured in the downlink control information DCI for receiving the physical downlink shared channel PDSCH;

The TCI and/or QCI configured in the MAC CE for receiving the physical downlink control channel PDCCH;

TCI and/or QCI of the reference signal RS indicated by the spatial relationship information signaling of the uplink sounding reference signal SRS resource;

The TCI and/or QCI configured by the RRC of the uplink SRS resource.
A frequency offset pre-compensation method, applied to a network device, and the method includes:

Perform frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device based on the indication of the uplink signaling sent by the terminal device, wherein the uplink signaling indicates whether the terminal device performs frequency offset pre-compensation when sending the uplink signal .
A frequency offset pre-compensation method, applied to a network device, and the method includes:

Sending notification signaling to a terminal device, where the notification signaling indicates whether the terminal device performs frequency offset pre-compensation when sending an uplink signal;

Based on whether the terminal device performs frequency offset pre-compensation when sending the uplink signal, the frequency offset pre-compensation is performed on the frequency of the downlink signal sent to the terminal device.
The method according to claim 13, wherein the notification signaling comprises: broadcast signaling or dedicated signaling sent to the terminal device.
The method according to any one of claims 12 to 14, wherein performing frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device comprises:

If the uplink signal sent by the terminal device is pre-compensated for frequency offset, the first compensation value is used to compensate the frequency of the downlink signal sent to the terminal device;

If the uplink signal sent by the terminal device is not pre-compensated for frequency offset, the second compensation value is used to compensate the frequency of the downlink signal sent to the terminal device, where the first compensation value is different from the second compensation value .
A terminal device, including:

The first sending module is configured to send uplink signaling to the network device, instructing the terminal device whether to perform frequency offset pre-compensation when sending the uplink signal.
The terminal device according to claim 16, wherein the first sending module, which sends uplink signaling to the network device, comprises: carrying an uplink media access control layer MAC control unit CE to instruct the terminal device to send an uplink signal Whether to do frequency offset pre-compensation at the time.
A terminal device, including:

The second sending module is used to perform or not perform frequency offset pre-compensation when sending an uplink signal according to the indication of the notification signaling sent by the network device.
The terminal device according to claim 18, wherein the notification signaling comprises: broadcast signaling sent by the network device or dedicated signaling sent by the network device to the terminal device.
The terminal device according to claim 18, wherein the terminal device further comprises:

The reporting module is configured to report capability information, where the capability information includes indication information indicating whether the terminal device supports frequency offset pre-compensation.
The terminal device according to any one of claims 16 to 20, wherein sending an uplink signal comprises:

If frequency offset pre-compensation is performed when transmitting an uplink signal, the terminal equipment estimates the frequency offset value for frequency offset pre-compensation according to the detected preset downlink signal, and performs frequency offset pre-compensation on the transmitted uplink signal according to the frequency offset value. Frequency offset pre-compensation;

If the frequency offset pre-compensation is not performed when sending the uplink signal, the terminal device uses the preset center frequency to send the uplink signal.
The terminal device according to claim 21, wherein the preset downlink signal comprises: a tracking pilot on a pre-configured target tracking pilot resource.
The terminal device according to claim 22, wherein the terminal device further comprises:

The second determining module is configured to, before obtaining the frequency offset value for frequency offset pre-compensation, if the network device is pre-configured with at least two tracking pilot resources, according to the signaling notification sent by the network device, or According to an agreement with the network device in advance, the target tracking pilot resource used for estimating the frequency offset value is determined.
The terminal device according to claim 23, wherein determining the target tracking pilot resource used for estimating the frequency offset value comprises one of the following:

Determine the target tracking pilot resource according to the indication of the radio resource control RRC configuration signaling sent by the network device;

According to an agreement with the network device in advance, the target tracking pilot resource is determined based on the transmission configuration indication TCI and/or quasi-co-located QCL of each of the at least two tracking pilot resources.
The terminal device according to claim 24, wherein the RRC configuration signaling carries identification information of the target tracking pilot resource, or the TCI and/or QCL in the RRC configuration signaling indicate the Target tracking pilot resources.
The terminal device according to claim 24, wherein the target tracking pilot resource is determined based on the transmission configuration indication TCI and/or quasi-co-located QCL of each tracking pilot resource in the at least two tracking pilot resources, Including: selecting the target tracking pilot resource from the at least two tracking pilot resources, wherein the TCI and/or QCL of the target tracking pilot resource is the same as one of the following:

TCI and/or QCI configured in the downlink control information DCI for receiving the physical downlink shared channel PDSCH;

The TCI and/or QCI configured in the MAC CE for receiving the physical downlink control channel PDCCH;

TCI and/or QCI of the reference signal RS indicated by the spatial relationship information signaling of the uplink sounding reference signal SRS resource;

The TCI and/or QCI configured by the RRC of the uplink SRS resource.
A network device including:

The first compensation module is configured to perform frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device based on the indication of the uplink signaling sent by the terminal device, wherein the uplink signaling indicates that the terminal device is sending an uplink signal Whether to do frequency offset pre-compensation when
A network device including:

The third sending module is configured to send notification signaling to a terminal device, where the notification signaling indicates whether the terminal device performs frequency offset pre-compensation when sending an uplink signal;

The second compensation module is configured to perform frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device based on whether the terminal device performs frequency offset pre-compensation when sending the uplink signal.
The network device according to claim 28, wherein the notification signaling comprises: broadcast signaling or dedicated signaling sent to the terminal device.
The network device according to claim 28 or 29, wherein the second compensation module performs frequency offset pre-compensation on the frequency of the downlink signal sent to the terminal device, comprising:

If the uplink signal sent by the terminal device is pre-compensated for frequency offset, the first compensation value is used to compensate the frequency of the downlink signal sent to the terminal device;

If the uplink signal sent by the terminal device is not pre-compensated for frequency offset, the second compensation value is used to compensate the frequency of the downlink signal sent to the terminal device, where the first compensation value is different from the second compensation value .
A terminal device, comprising: a memory, a processor, and a computer program stored on the memory and running on the processor, the computer program being executed by the processor is implemented as in claims 1 to 11 Any of the steps of the method.
A network device, comprising: a memory, a processor, and a computer program stored on the memory and capable of running on the processor, the computer program being executed by the processor implements as in claims 12 to 15 Any of the steps of the method.
A computer-readable storage medium having a computer program stored on the computer-readable storage medium, and when the computer program is executed by a processor, the following is achieved:

The steps of the method according to any one of claims 1 to 11; or

The steps of the method according to any one of claims 12 to 15.