Frequency offset estimation method, device, equipment, system, storage medium and computer program product

Abstract

The invention discloses a frequency offset estimation method, the method is applied to terminal equipment, and the method comprises the following steps: sending first indication information to first network equipment; wherein the first indication information is used for indicating a frequency offset estimation parameter value of at least one first transmit-receive node (TRP) corresponding to the first network equipment. The invention also discloses a frequency offset estimation device, equipment, a system, a storage medium and a computer program product.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a frequency offset estimation method, apparatus, device, system, storage medium, and computer program product. Background Technology

[0002] In related technologies, the implementation of Coherent Joint Transmission (CJT) assumes perfect synchronization and calibration. However, in practical engineering, frequency offset, or frequency deviation, occurs between multiple Transmission and Receiving Points (TRPs) due to local oscillator clock drift. Currently, in mobile terminal scenarios, such as the High Speed ​​Train-Single Frequency Network (HST-SFN) scenario, to address the frequency offset between TRPs caused by the high-speed movement of high-speed trains, the protocol specifies a multi-TRP frequency offset estimation method based on Tracking Reference Signal (TRS) and Sounding Reference Signal (SRS). This method involves the network side and the user equipment (UE) side repeatedly transmitting reference signals to each other, and then performing frequency offset estimation on the network side.

[0003] However, in the current implementation process, frequency offset estimation can only be achieved on the network side after the network side and the UE side transmit reference signals to each other multiple times. How to reduce the reference signals transmitted between the network side and the UE side to achieve frequency offset estimation on the UE side has become a technical problem that urgently needs to be solved.

[0004] Application content

[0005] To address the aforementioned technical problems, this application aims to provide a frequency offset estimation method, apparatus, device, system, storage medium, and computer program product. This solves the problem that currently, the network side and UE side need to transmit multiple reference signals to each other to achieve frequency offset estimation. A frequency offset estimation method is proposed, which estimates the frequency offset on the UE side, eliminating the need for the UE side to send reference signals to the network side, thus effectively saving uplink resources on the UE side.

[0006] The technical solution of this application is implemented as follows:

[0007] This application provides a frequency offset estimation method, which is applied to a terminal device, and the method includes:

[0008] Send a first indication message to a first network device; wherein the first indication message is used to indicate the frequency offset estimation parameter value of at least one first transceiver node TRP corresponding to the first network device.

[0009] The method in the above scheme further includes:

[0010] Establish communication links with each of the m second TRPs; where m is an integer greater than or equal to 2, and the m second TRPs include at least one of the first TRPs;

[0011] Receive two or more reference signals sent by each of the second TRPs at different times to obtain a reference signal group corresponding to each of the second TRPs;

[0012] Based on the second indication information and the m groups of reference signals, a first indication information is generated that includes the frequency offset estimation parameter value of at least one of the first TRPs; wherein the second indication information is the configuration information of the m second TRPs.

[0013] In the above scheme, before generating first indication information including at least one frequency offset estimation parameter value of the first TRP based on the second indication information and m groups of the reference signal groups, the method further includes:

[0014] Receive the second indication information sent by one or more second network devices; wherein the one or more second network devices include the first network device.

[0015] In the above scheme, the second indication information includes at least m reference signal configuration information of the second TRP, and / or frequency offset feedback configuration information for indicating the frequency offset parameters reported by the terminal device.

[0016] The method in the above scheme further includes:

[0017] If the frequency offset feedback configuration information is not included in the second indication information, the frequency offset feedback configuration information is determined based on the device characteristic parameters of the terminal device.

[0018] In the above scheme, the frequency offset feedback configuration information includes at least one of the following: frequency offset parameter reporting information, frequency offset parameter representation method, frequency offset parameter quantization method, and TRP selection information indicating the selection of TRP.

[0019] In the above scheme, the frequency offset parameter is represented in one of the following ways:

[0020] The frequency offset parameter value is the difference between the center frequency of the first selected TRP and the center frequency of the second selected TRP;

[0021] The frequency offset parameter value is the ratio of the difference to the center frequency of the first selected TRP or the second selected TRP;

[0022] The frequency offset sub-parameter value is the ratio of the difference to the subcarrier spacing SCS;

[0023] The frequency offset sub-parameter value is one-nth of the subcarrier spacing SCS; where n is an integer greater than or equal to 1.

[0024] The frequency offset parameter value is m times one-mth of the symbol interval.

[0025] In the above scheme, when the device characteristic parameters do not include the moving speed parameter of the terminal device, the frequency offset parameter is expressed as: the difference between 1 and the ratio of the center frequency of the first selected TRP to the center frequency of the second selected TRP, or the difference between 1 and the ratio of the center frequency of the second selected TRP to the center frequency of the first selected TRP.

[0026] In the above scheme, the frequency offset parameter quantization method includes one of the following information:

[0027] Each of the first TRPs includes a minimum frequency offset parameter value, a maximum frequency offset parameter value, a range between the minimum and maximum frequency offset parameter values ​​divided into K-2 parts, and a target frequency offset quantization method for quantizing each frequency offset sub-parameter value; wherein the minimum and maximum frequency offset parameter values ​​correspond to the frequency offset sub-parameter values, the minimum and maximum frequency offset parameter values ​​are absolute or non-absolute values, and K is an integer greater than or equal to 2;

[0028] The quantization relationship between one or more frequency offset sub-parameter values ​​and the quantization frequency offset value.

[0029] In the above scheme, the target frequency offset quantization method indicates that the length of the quantized frequency offset value corresponding to each frequency offset sub-parameter value is log2(K) bits, and the quantized frequency offset value corresponding to each frequency offset sub-parameter value is a preset quantized frequency offset value. The preset quantized frequency offset value is the minimum quantized frequency offset value included in the evenly divided interval of the corresponding frequency offset sub-parameter value after dividing the range from the minimum frequency offset parameter value to the maximum frequency offset parameter value into K-2 parts.

[0030] In the above scheme, the TRP selection information includes one of the following:

[0031] All TRPs that establish a communication link with the terminal device;

[0032] A comparison and selection relationship between frequency offset estimation parameter values ​​and frequency offset thresholds; wherein, the frequency offset estimation parameter value is the frequency offset sub-parameter value or the quantized frequency offset value corresponding to each of the frequency offset sub-parameter values;

[0033] The preset number of TRPs to be reported and the selection requirements for selecting the preset number of TRPs.

[0034] In the above scheme, the frequency offset parameter reporting information is in one of the following forms:

[0035] The configuration information indicates a reference TRP, and reports the frequency offset parameter value of the selected TRP relative to the reference TRP and the TRP index of the selected TRP; wherein, the selected TRP is a TRP selected according to the TRP selection information;

[0036] The configuration information does not indicate the reference TRP, and reports the frequency offset parameter value obtained by combining the TRPs selected according to the TRP selection information in pairs and the TRP index of the corresponding two TRPs;

[0037] The frequency offset parameter values ​​of the TRPs selected according to the TRP selection information are reported sequentially using a preset TRP distribution order.

[0038] In the above scheme, the frequency offset parameter value is the quantized frequency offset value, and the minimum frequency offset parameter value corresponding to each first TRP is the actual minimum frequency offset parameter value of each first TRP. When the maximum frequency offset parameter value corresponding to each first TRP is the actual maximum frequency offset parameter value of each first TRP, the frequency offset parameter reporting information also includes the actual minimum frequency offset parameter value and the actual maximum frequency offset parameter value of each first TRP.

[0039] In the above scheme, generating first indication information based on the second indication information and m groups of reference signals, including at least one frequency offset estimation parameter value of the first TRP, includes:

[0040] Based on the reference signal configuration information of each second TRP and the corresponding reference signal group, the center frequency of each second TRP is calculated;

[0041] Based on the frequency offset feedback configuration information and the center frequencies of m second TRPs, at least one frequency offset estimation parameter value of the first TRP is determined; wherein, the frequency offset estimation parameter value is the frequency offset sub-parameter value corresponding to each first TRP, or the quantized frequency offset value corresponding to each frequency offset sub-parameter value;

[0042] The first indication information is generated based on the frequency offset estimation parameter value of at least one of the first TRPs.

[0043] In the above scheme, the first indication information belongs to the uplink control information UCI carried by the physical uplink control channel PUCCH, or the UCI carried by the physical uplink shared channel PUSCH.

[0044] This application provides a frequency offset estimation device, which is applied to a terminal device. The device includes: a transmitting unit; wherein:

[0045] The sending unit is configured to send first indication information to the first network device; wherein the first indication information is configured to indicate the frequency offset estimation parameter value of at least one first transceiver node TRP corresponding to the first network device.

[0046] This application provides a terminal device, the device comprising: a communication interface, a memory, a processor, and a communication bus; wherein:

[0047] Memory, used to store executable information;

[0048] The communication bus is used to implement communication connections between the communication interface, processor, and memory.

[0049] A processor is configured to execute a frequency offset estimation program stored in memory, implementing the steps in the frequency offset estimation method as described in any of the preceding claims.

[0050] This application provides a frequency offset estimation system, the system comprising at least: a terminal device and a first network device; wherein:

[0051] The terminal device is used to implement the steps of the frequency offset estimation method as described in any of the above items;

[0052] The first network device is configured to receive first indication information sent by the terminal device, perform frequency offset correction, and provide communication network services to the terminal device.

[0053] This application provides a storage medium storing a frequency offset estimation program, which, when executed, implements the steps of the frequency offset estimation method as described in any of the preceding claims.

[0054] This application provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the frequency offset estimation method as described in any of the preceding claims.

[0055] This application provides a frequency offset estimation method, apparatus, device, system, storage medium, and computer program product. A terminal device sends first indication information to a first network device, wherein the first indication information indicates the frequency offset estimation parameter value of at least one first TRP corresponding to the first network device. In this way, by sending the determined frequency offset estimation parameter value of at least one first TRP to the first network device through the terminal device, the problem of the current requirement for the network side and UE side to transmit multiple reference signals to achieve frequency offset estimation is solved. A frequency offset estimation method is proposed, which estimates the frequency offset at the UE side, eliminating the need for the UE side to send reference signals to the network side, effectively saving uplink resources on the UE side. Attached Figure Description

[0056] Figure 1 A flowchart illustrating the frequency offset estimation method provided in the embodiments of this application. Figure 1 ;

[0057] Figure 2 A flowchart illustrating the frequency offset estimation method provided in the embodiments of this application. Figure 2 ;

[0058] Figure 3 A flowchart illustrating the frequency offset estimation method provided in the embodiments of this application. Figure 3 ;

[0059] Figure 4 A flowchart illustrating the frequency offset estimation method provided in the embodiments of this application. Figure 4 ;

[0060] Figure 5 This is a schematic diagram illustrating an application scenario of a frequency offset estimation method provided in an embodiment of this application.

[0061] Figure 6 This application provides a schematic diagram of an application scenario where a TRP transmits a reference signal to a UE.

[0062] Figure 7 This is a schematic diagram of the structure of a frequency offset estimation device provided in an embodiment of this application;

[0063] Figure 8 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application;

[0064] Figure 9 This is a schematic diagram of the structure of a frequency offset estimation system provided in an embodiment of this application. Detailed Implementation

[0065] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0066] Embodiments of this application provide a frequency offset estimation method, referring to... Figure 1 As shown, the method is applied to a terminal device, and the method includes the following steps:

[0067] Step 101: Send the first instruction information to the first network device.

[0068] The first indication information is used to indicate the frequency offset estimation parameter value of at least one first transceiver node (TRP) corresponding to the first network device.

[0069] In this embodiment, the first network device can be a device currently providing communication network services to the terminal device, such as a base station or signal node. After the terminal device determines that it has obtained at least one frequency offset estimation parameter value of a first TRP, it sends the frequency offset estimation parameter value of at least one first TRP to the first network device through a first indication message. In this way, the first network device can perform frequency offset correction operation based on the frequency offset estimation parameter value of at least one TRP sent by the terminal device, thereby ensuring the signal service provided to the terminal device.

[0070] The frequency offset estimation method provided in this application involves a terminal device sending first indication information to a first network device. The first indication information indicates the frequency offset estimation parameter value of at least one first TRP corresponding to the first network device. By having the terminal device send the determined frequency offset estimation parameter values ​​of at least one first TRP to the first network device, this solves the problem that the network side and UE side currently need to transmit multiple reference signals to each other to achieve frequency offset estimation. This proposed frequency offset estimation method, by estimating the frequency offset on the UE side, eliminates the need for the UE side to send reference signals to the network side, effectively saving uplink resources on the UE side.

[0071] Based on the foregoing embodiments, embodiments of this application provide a frequency offset estimation method, which is applied to a terminal device, with reference to... Figure 2 As shown, the method includes the following steps:

[0072] Step 201: Establish communication links with each of the m second TRPs.

[0073] Where m is an integer greater than or equal to 2, and the m second TRPs include at least one first TRP.

[0074] In this embodiment, the m second TRPs can belong to different network devices or to the same network device. At different times, the terminal device establishes communication links with one or more different second TRPs.

[0075] Step 202: Receive two or more reference signals sent by each second TRP at different times to obtain the reference signal group corresponding to each second TRP.

[0076] In this embodiment of the application, when the terminal device establishes a communication link with each second TRP, each second TRP will send reference signals to the terminal device multiple times at certain time intervals during the process of establishing a communication link with the terminal device. In this way, the terminal device determines the two or more reference signals sent by each second TRP as the reference signal group corresponding to each second TRP.

[0077] Step 203: Based on the second indication information and m sets of reference signals, generate first indication information including at least one frequency offset estimation parameter value of the first TRP.

[0078] The second indication information is the configuration information of m second TRPs.

[0079] In this embodiment, the terminal device obtains configuration information pre-configured for m second TRPs to obtain second indication information. The terminal device analyzes the second indication information and m sets of reference signal groups to obtain frequency offset estimation parameter values ​​for at least one first TRP, and generates first indication information based on the frequency offset estimation parameter values ​​of at least one first TRP. It should be noted that the m second TRPs include at least one first TRP. The at least one first TRP is a TRP set on the first network device.

[0080] Step 204: Send the first instruction information to the first network device.

[0081] The first indication information is used to indicate the frequency offset estimation parameter value of at least one first transceiver node (TRP) corresponding to the first network device.

[0082] Based on the foregoing embodiments, in other embodiments of this application, reference is made to... Figure 3 As shown, before the terminal device executes step 203, it also executes step 205:

[0083] Step 205: Receive second instruction information sent by one or more second network devices.

[0084] One or more of the second network devices include the first network device.

[0085] In this embodiment of the application, the second indication information may be sent to the terminal device by one or more second network devices, that is, the configuration information of m second TRPs is obtained by configuring one or more second network devices.

[0086] Based on the foregoing embodiments, in other embodiments of this application, the second indication information includes at least m reference signal configuration information for second TRPs, and / or frequency offset feedback configuration information for indicating frequency offset parameters reported by the terminal device.

[0087] In this embodiment, the second indication information includes at least: reference signal configuration information for m second TRPs, frequency offset feedback configuration information for instructing the terminal device to report frequency offset parameters, or reference signal configuration information for m second TRPs and frequency offset feedback configuration information for instructing the terminal device to report frequency offset parameters. The reference signal configuration information may, for example, be signal characteristic parameters of the corresponding reference signal, and may further include the correlation relationship between the reference signals of the m second TRPs. The frequency offset parameters are parameters determined at the terminal device and sent to the corresponding network device so that the network device can determine the frequency offset of the corresponding TRP. For example, it may be a frequency offset value already estimated by the terminal device, or a parameter value used to determine the frequency offset value. The frequency offset feedback configuration information is configuration information used to instruct the terminal device how to report to the corresponding network device after determining the relevant parameter value related to the frequency offset, i.e., the frequency offset parameters.

[0088] Based on the foregoing embodiments, in other embodiments of this application, such as Figure 4 As shown, before executing step 203, the terminal device also executes step 206:

[0089] Step 206: If the second indication information does not include frequency offset feedback configuration information, determine the frequency offset feedback configuration information based on the device characteristic parameters of the terminal device.

[0090] In this embodiment, the device characteristic parameters of the terminal device may be, for example, channel quality parameters between the terminal device and the network base station, or movement parameters indicating the movement of the terminal device during application, such as the moving speed of the terminal device. In some application scenarios, the frequency offset feedback configuration information may be the following information content set by default. When the second indication information only includes the reference signal configuration information of m second TRPs and no frequency offset feedback configuration information is configured, the terminal device determines the frequency offset feedback configuration information used to feed back the relevant parameter values ​​obtained from the frequency offset based on its own device characteristic parameters.

[0091] Based on the foregoing embodiments, in other embodiments of this application, the frequency offset feedback configuration information includes at least one of the following: frequency offset parameter reporting information, frequency offset parameter representation method, frequency offset parameter quantization method, and TRP selection information indicating the selection of TRP.

[0092] In this embodiment of the application, frequency offset parameter reporting information refers to the reporting format of the specific frequency offset parameter value reported when reporting to the network device, frequency offset parameter representation refers to how to determine the specific frequency offset estimated parameter value corresponding to the frequency offset parameter, frequency offset parameter quantization method refers to the quantization method of how to calculate the frequency offset estimated parameter value corresponding to the frequency offset parameter, and TRP selection information indicating the selection of TRPs is used to indicate how to select which TRPs to calculate the corresponding frequency offset parameter for reporting.

[0093] Based on the foregoing embodiments, in other embodiments of this application, the frequency offset parameter is represented in one of the following ways:

[0094] The frequency offset parameter value is the difference between the center frequency of the first selected TRP and the center frequency of the second selected TRP;

[0095] In this embodiment, if the frequency offset parameter representation is configured such that the frequency offset sub-parameter value p = fo = f1 - f2 is calculated from the difference between the center frequency f1 of the first selected TRP and the center frequency f2 of the second selected TRP, the terminal device, upon receiving this configuration, calculates the corresponding frequency offset sub-parameter value using this frequency offset parameter representation. In this case, the unit of the frequency offset sub-parameter value is Hertz (Hz), Megahertz (MHz), or GiHertz (GHz).

[0096] The frequency offset parameter value is the ratio of the difference to the center frequency of the first selected TRP or the second selected TRP;

[0097] In this embodiment of the application, if the frequency offset parameter is configured as the ratio of the difference to the center frequency of the first selected TRP or the second selected TRP, i.e., p = fo / f1 or p = fo / f2, then the unit of the frequency offset sub-parameter value is one billionth (ppb) or one thousandth (ppm), and the value of p can be, for example, 0.01ppm, 0.1ppm, 0.2ppm or 0.1ppb, etc.

[0098] The frequency offset sub-parameter is the ratio of the difference to the sub-carrier spacing (SCS).

[0099] In this embodiment of the application, the frequency offset parameter is configured to be the ratio of the difference to the subcarrier spacing SCSΔf, i.e., p = fo / Δf. In this case, the value of p can be, for example, 1, 1 / 2, 1 / 4 or 1 / 8.

[0100] The frequency offset sub-parameter value is one-nth of the subcarrier spacing SCS; where n is an integer greater than or equal to 1.

[0101] In this embodiment of the application, the frequency offset parameter is configured to be one-nth of the subcarrier spacing SCSΔf, i.e., p = Δf / n, where n can be, for example, 1, 2, 4 or 8, and the corresponding p can be Δf, Δf / 2, Δf / 4 or Δf / 8, etc.

[0102] The frequency offset parameter value is m times one-mth of the symbol interval;

[0103] In the embodiments of this application, if the frequency offset parameter is configured to be one-m times the symbol interval Δt, i.e., p = 1 / (mΔt), for example, the value of m can be 4, 8, 16, 32 or 512, etc., and the corresponding value of p is 1 / (4Δt), 1 / (8Δt), 1 / (16Δt), 1 / (32Δt) or 1 / (512Δt), etc.

[0104] Based on the foregoing embodiments, in other embodiments of this application, when the device characteristic parameters do not include the moving speed parameter of the terminal device, the frequency offset parameter is expressed as: the difference between 1 and the ratio of the center frequency of the first selected TRP to the center frequency of the second selected TRP, or the ratio of 1 to the center frequency of the second selected TRP to the center frequency of the first selected TRP.

[0105] In this embodiment, when the second indication information does not have frequency offset feedback configuration information and the device characteristic parameter of the terminal device is the moving speed parameter of the terminal device, if the terminal device can detect its own moving speed, the frequency offset parameter representation method included in the frequency offset feedback configuration information determined by the terminal device according to the device characteristic parameter can be one of the above five methods. When the terminal device fails to detect its own moving speed, the frequency offset parameter representation method included in the frequency offset feedback configuration information determined by the terminal device according to the device characteristic parameter is by default the difference between 1 and the ratio of the center frequency of the first selected TRP to the center frequency of the second selected TRP, which can be specifically recorded as 1 - the center frequency of the first selected TRP / the center frequency of the second selected TRP, or the difference between 1 and the ratio of the center frequency of the second selected TRP to the center frequency of the first selected TRP, which can be specifically recorded as 1 - the center frequency of the second selected TRP / the center frequency of the first selected TRP.

[0106] Based on the foregoing embodiments, in other embodiments of this application, the frequency offset parameter quantization method includes one of the following information:

[0107] For each first TRP, the minimum frequency offset parameter value, the maximum frequency offset parameter value, the range between the minimum and maximum frequency offset parameter values ​​divided into K-2 parts, and the target frequency offset quantization method for quantizing each frequency offset sub-parameter value are defined. Among these, the minimum and maximum frequency offset parameter values ​​correspond to the frequency offset sub-parameter values, and the minimum and maximum frequency offset parameter values ​​are absolute or non-absolute values, where K is an integer greater than or equal to 2.

[0108] The quantization relationship between one or more frequency offset sub-parameter values ​​and the quantization frequency offset value.

[0109] In this embodiment, the minimum frequency offset parameter value corresponding to each first TRP can be the actual minimum frequency offset parameter value determined by the reference signal sent by each TRP, or it can be the theoretical minimum frequency offset empirical parameter value configured by the network device. The specific value can be determined based on the actual situation. Similarly, the maximum frequency offset parameter value for each first TRP is determined in the same way. The preset number of parts K can be an empirical value configured by the network device, or it can be an empirical value determined by the network device or terminal device based on the downlink resource size allocated to the terminal device by the network device. When the range between the minimum and maximum frequency offset parameter values ​​is divided into K-2 parts, K quantized values, including the minimum and maximum frequency offset parameter values, can be obtained. The corresponding minimum and maximum frequency offset parameter values ​​can be unprocessed or processed with absolute values, depending on the actual configuration requirements.

[0110] The quantization relationship between one or more frequency offset sub-parameter values ​​and the quantization frequency offset value is usually the quantization frequency offset value corresponding to different pre-defined frequency offset sub-parameter values. This quantization relationship can be expressed by a mathematical calculation formula or by an empirical relationship table, which includes one or more frequency offset sub-parameter values ​​and a list of corresponding quantization frequency offset values.

[0111] Based on the foregoing embodiments, in other embodiments of this application, the target frequency offset quantization method indicates that the length of the quantized frequency offset value corresponding to each frequency offset sub-parameter value is log2(K) bits, the quantized frequency offset value corresponding to each frequency offset sub-parameter value is a preset quantized frequency offset value, and the preset quantized frequency offset value is the minimum quantized frequency offset value included in the equal interval after the corresponding frequency offset sub-parameter value is divided into K-2 parts in the range from the minimum frequency offset parameter value to the maximum frequency offset parameter value.

[0112] In this embodiment, when quantizing the frequency offset sub-parameter value, a bit representation with a length of log2(K) bits can be used. Correspondingly, after determining the obtained frequency offset sub-parameter value, the terminal device determines the interval within which the frequency offset sub-parameter value falls within a range of K-2 equal parts from the minimum to the maximum frequency offset parameter value. Then, it determines the minimum quantized frequency offset value corresponding to this interval and sets this minimum quantized frequency offset value as the quantized frequency offset value of the frequency offset sub-parameter value. In this way, the terminal device sends the bit-quantized frequency offset sub-parameter value to the network device, ensuring transmission efficiency.

[0113] Based on the foregoing embodiments, in other embodiments of this application, the TRP selection information includes one of the following:

[0114] All TRPs that establish a communication link with the terminal device;

[0115] The comparison and selection relationship between the frequency offset estimation parameter value and the frequency offset threshold; wherein, the frequency offset estimation parameter value is the frequency offset sub-parameter value or the quantized frequency offset value corresponding to each frequency offset sub-parameter value;

[0116] The preset number of TRPs to be reported and the selection requirements for the preset number of TRPs.

[0117] In this embodiment, when the TRP selection information is configured to include all TRPs that have established communication links with the terminal device, it indicates that the frequency offset sub-parameter values ​​of all TRPs that have established communication links with the terminal device need to be uploaded. When the TRP selection information is configured to compare the frequency offset estimated parameter value with the frequency offset threshold, for example, when the comparison relationship is less than, the terminal device can report the frequency offset estimated parameter values ​​of TRPs whose frequency offset estimated parameter values ​​are less than the frequency offset threshold, and will not report the frequency offset estimated parameter values ​​of TRPs whose corresponding values ​​are greater than or equal to the frequency offset threshold. When the TRP selection information is configured to include a preset number of TRPs to be reported and a selection requirement for selecting a preset number of TRPs, the preset number can be an empirical value configured based on a large number of experiments. The selection requirement for selecting a preset number of TRPs can be, for example, sorting the frequency offset sub-parameter values ​​of TRPs in a certain order and then selecting a preset number of TRPs before or after sorting.

[0118] Based on the foregoing embodiments, in other embodiments of this application, the frequency offset parameter reporting information is one of the following information formats:

[0119] The configuration information indicates the reference TRP, reports the frequency offset parameter value of the selected TRP relative to the reference TRP, and the TRP index of the selected TRP; where the selected TRP is the TRP selected according to the TRP selection information;

[0120] The configuration information does not indicate the reference TRP. The report shows the frequency offset parameter value obtained by combining the TRPs selected according to the TRP selection information in pairs and the corresponding TRP indexes of the two TRPs.

[0121] The frequency offset parameter values ​​of the TRPs selected according to the TRP selection information are reported sequentially using a preset TRP distribution order.

[0122] In this embodiment, when the configuration information indicates a reference TRP and the frequency offset parameter reporting information includes the frequency offset parameter value of the selected TRP relative to the reference TRP and the TRP index of the selected TRP, the reference TRP can be either the first selected TRP or the second selected TRP in the aforementioned frequency offset parameter representation method, which can be determined by the actual application scenario. The frequency offset parameter value of the TRP relative to the reference TRP, or the frequency offset parameter value obtained by combining TRPs selected according to the TRP selection information in pairs, can be determined after processing according to the aforementioned frequency offset parameter representation method and frequency offset parameter quantization method. The preset TRP distribution order can be, for example, a sorting order based on frequency offset from largest to smallest or smallest to largest.

[0123] Based on the foregoing embodiments, in other embodiments of this application, when the frequency offset parameter value is the quantized frequency offset value, and the minimum frequency offset parameter value corresponding to each first TRP is the actual minimum frequency offset parameter value of each first TRP, and the maximum frequency offset parameter value corresponding to each first TRP is the actual maximum frequency offset parameter value of each first TRP, the frequency offset parameter reporting information also includes the actual minimum frequency offset parameter value and the actual maximum frequency offset parameter value of each first TRP.

[0124] Based on the foregoing embodiments, in other embodiments of this application, step 203 can be implemented by steps 203a to 203c:

[0125] Step 203a: Calculate the center frequency of each second TRP based on the reference signal configuration information and the corresponding reference signal group of each second TRP.

[0126] In this embodiment, the center frequency of each second TRP is calculated based on at least two reference signals transmitted by each second TRP and the corresponding reference signal configuration information. When a second TRP includes more than two reference signals, determining the center frequency of the second TRP can be achieved by selecting two reference signals from the more than two signals according to a selection rule, and calculating based on their corresponding reference signal configuration information; or by performing pairwise combination calculations on the more than two reference signals from the more than two signals according to the selection rule to obtain multiple center frequencies of the second TRP, then calculating the average of the corresponding center frequencies, and using the calculated average center frequency as the final center frequency of the second TRP.

[0127] Step 203b: Based on the frequency offset feedback configuration information and the center frequencies of the m second TRPs, determine the frequency offset estimation parameter value of at least one first TRP.

[0128] Among them, the frequency offset estimation parameter value is the frequency offset sub-parameter value corresponding to each first TRP, or the quantized frequency offset value corresponding to each frequency offset sub-parameter value.

[0129] In an embodiment of the present application, the terminal device calculates and analyzes the center frequencies of m second TRPs according to the configuration method in the frequency offset feedback configuration information, so as to determine at least one frequency offset estimation parameter value of the first TRP.

[0130] Step 203c: Generate first indication information based on at least one frequency offset estimation parameter value of the first TRP.

[0131] Based on the foregoing embodiments, in other embodiments of the present application, the first indication information belongs to the uplink control information (UCI) carried by the physical uplink control channel (PUCCH), or the UCI carried by the physical uplink shared channel (PUSCH).

[0132] Based on the foregoing embodiments, an embodiment of the present application provides a method for estimating the frequency offset between multiple TRPs based on speed measurement. When multiple TRPs measure the speed of the same user, i.e., the terminal device, the center frequency offset between multiple TRPs can be obtained by processing the Doppler frequency shift calculation result calculated by using the Doppler frequency shift calculation method. The specific implementation process can be as follows:

[0133] Step a11: The base station sends configuration information to the UE through radio resource control (RRC) signaling.

[0134] Among them, the configuration information includes the reference signal configuration information of each TRP included in the base station, and / or the frequency offset reporting configuration information. The reference signal configuration information is used to configure each downlink reference signal of each TRP, the association relationship of multiple downlink reference signals of each TRP, and whether multiple downlink reference signals belong to the same resource set, etc. The frequency offset reporting configuration information is used to specify the method for the terminal to report the frequency offset amount, including but not limited to the frequency offset reporting method, the frequency offset representation method, the frequency offset parameter quantization method, the TRP selection information, etc.

[0135] Among them, the frequency offset reporting method can be one of the following methods:

[0136] Method 1: When the configuration information indicates a certain TRP as the reference TRP, the reported content is <TRP index, frequency offset>.

[0137] Among them, the TRP index can be the index assigned by the base station to each TRP and has been pre-informed to the terminal in advance, or it can be the reference signal resource set index sent by each TRP. For the case where each TRP sends multiple reference signals, the TRP index during reporting is the index of at least one reference signal sent by a certain TRP. The frequency offset in the reported content is the frequency offset of other TRPs relative to the reference TRP, and the corresponding TRP index is the index of other TRPs. Exemplarily, when the reference TRP is TRP1, after determining the frequency offset between TRP2 and TRP1, report <the index of TRP2, the frequency offset between TRP2 and TRP1>.

[0138] Method 2: The reference TRP is not indicated in the configuration information, and the reported content is <TRPi index, TRPj index, frequency offset>.

[0139] Among them, this method indicates that after the UE calculates the frequency offset between two TRPs, it uploads both the indexes of these two TRPs and the frequency offset between these two TRPs.

[0140] Method 3: Report the frequency offset values of each TRP in sequence according to the TRP order agreed upon by the protocol between the base station and the terminal or configured at a higher layer, without reporting the TRP index.

[0141] Among them, exemplarily, when the TRP order agreed upon by the protocol between the base station and the terminal or configured at a higher layer is TRP1, TRP2,..., TRPN, the reported content is the frequency offset sequence {frequency offset 1, frequency offset 2,..., frequency offset N} calculated according to the above TRP order.

[0142] The frequency offset representation method is one of the following:

[0143] Solution 1, an absolute representation method: The frequency offset is the difference between the center frequencies of two different TRPs, and the unit of the corresponding frequency offset is Hz or MHz or GHz;

[0144] Solution 2, a relative representation method: The frequency offset is the difference between the center frequencies of two different TRPs divided by the center frequency of one of the two different TRPs, and the unit of the corresponding frequency offset is ppb or ppm;

[0145] Solution 3, a relative representation method: The frequency offset is the difference between the center frequencies of two different TRPs divided by the subcarrier spacing SCS.

[0146] Solution 4, a relative representation method: The frequency offset is one nth of the subcarrier spacing SCS; the value of n is not 0;

[0147] Solution 5, a relative representation method: The frequency offset is one mth of the symbol interval; the value of m is not 0;

[0148] The frequency offset parameter quantization method is one of the following:

[0149] Option 1: Instruct the terminal device to divide the range between the minimum and maximum frequency offsets of each TRP into K-2 equal parts, determine the interval range in which the frequency offset value of each TRP lies, and determine the minimum frequency offset value within the interval as the quantized frequency offset value of each TRP. It should be noted that the length of the quantized frequency offset value of each TRP can be... The sequence representation of bits. For example, assuming the range between the minimum and maximum frequency offset of TRP1 is divided into four equal parts, resulting in six quantized values, the length of each quantized frequency offset value is 3 bits. The corresponding quantized frequency offset values ​​are 000, 001, 010, 011, 100, and 101. If the obtained frequency offset value of TRP1 is determined to be within the range of 000-001 and is close to the frequency offset value corresponding to 000, then the quantized frequency offset value of TRP1 can be determined to be 000. It should be noted that the minimum and maximum frequency offsets of each TRP can be the allowed frequency offset values ​​configured by the base station or the actual frequency offset detected by the terminal device. Correspondingly, when the minimum and maximum frequency offsets of each TRP are the actual frequency offsets detected by the terminal device, the terminal device, in addition to reporting the quantized frequency offset values ​​of each TRP, also needs to report the maximum frequency offset value, the minimum frequency offset value, and the length of the quantized frequency offset value sequence.

[0150] Option 2: Instruct the terminal device to divide the range between the minimum and maximum absolute values ​​of the frequency offset values ​​of each TRP into K-2 equal parts, determine the interval range in which the absolute value of the frequency offset value of each TRP lies, and determine the minimum frequency offset value within the interval as the quantized frequency offset value of each TRP. It should be noted that the length of the quantized frequency offset value of each TRP can be... The terminal device uses a bit sequence representation. Correspondingly, when reporting the quantization frequency offset value, it also needs to report the actual positive or negative sign of the quantization frequency offset value. In this case, a single bit can be used to represent the positive or negative sign of the quantization frequency offset value; for example, 0 represents a negative quantization frequency offset value for the TRP, and 1 represents a positive quantization frequency offset value for the TRP. Thus, during the reporting process, the terminal device needs to report the absolute value of the quantization frequency offset for each TRP and its positive or negative sign. Furthermore, when the minimum and maximum absolute values ​​of the frequency offset values ​​for each TRP are determined based on the actual frequency offset values ​​of each TRP, the terminal device also needs to report the maximum absolute frequency offset value, the minimum absolute frequency offset value, and the length of the quantization frequency offset absolute value sequence.

[0151] Option 3: One or more quantization tables are pre-configured by the base station or higher-layer protocols. This allows the terminal device to directly select a quantization table to quantize the frequency offset and / or absolute frequency offset of each TRP. In this case, during the reporting process, if multiple quantization tables are available, the terminal device needs to report the table index of the selected quantization table, as well as the quantized frequency offset or absolute frequency offset of each TRP.

[0152] The TRP selection information is one of the following:

[0153] Option 1: Instruct the terminal device not to screen TRPs according to the frequency offset value, and directly report the frequency offset values of all TRPs to the gNB, so that the base station can select TRPs.

[0154] Option 2: Instruct the terminal device to compare the frequency offset threshold with the frequency offset values of each TRP to screen TRPs, so that the terminal device reports the frequency offset values of the screened TRPs to the base station, and / or sends corresponding operation instructions. Among them, the frequency offset threshold can be the frequency offset threshold agreed upon by the protocol between the base station and the terminal or configured by the upper layer, or the frequency offset threshold set by the terminal according to its own needs. The operation instruction can be to instruct the TRP with a frequency offset value greater than the frequency offset threshold to adjust its local oscillator frequency, and / or to instruct the TRP with a frequency offset value less than the frequency offset threshold not to adjust its local oscillator frequency.

[0155] Option 3: Instruct the terminal device to screen TRPs according to the preset number of TRPs to be reported. Correspondingly, when reporting, report the TRP index and frequency offset value of the pre-screened TRPs. Among them, the preset number of TRPs to be reported can be determined by the protocol agreement or upper layer configuration between the base station and the terminal, or determined by the terminal. For example, the UE can arrange the frequency offset values of each TRP except the reference TRP in ascending order, and report <TRP index, frequency offset> of the M TRPs with the smallest frequency offset.

[0156] Exemplarily, the corresponding application scenario of the embodiment is as Figure 5 shown, including three TRPs (denoted as TRP1, TRP2, and TRP3) and a UE under a base station. Among them, TRP1 is set as the reference TRP. Frequency calibration needs to be performed among the three TRPs. Assuming that the UE is within the service range of the three TRPs, its true speed is v = 10 m / s, and the direction is -π / 2.

[0157] There is a prior consensus between the base station and the UE on the frequency offset quantization table (such as specified by the upper layer protocol), and two quantization tables with different frequency offset ranges and granularities are set, namely Table 1 and Table 2. Among them, the index of Table 1 is 0, and the index of Table 2 is 1.

[0158] Table 1

[0159] Frequency offset value (ppm) -0.1 -0.05 0 0.05 0.1 Identifier 000 001 010 011 100

[0160] Table 2

[0161] Frequency offset value (ppm) -1 -0.5 0 0.5 1 Identifier 000 001 010 011 100

[0162] Based on the foregoing prerequisite conditions, the base station sends the reference signal configuration information and / or frequency offset feedback configuration information of each TRP to the UE through RRC signaling.

[0163] The reference signal can be a tracking reference signal (TRS) used for frequency offset calibration or a positioning reference signal (PRS) used for positioning. It can also be other existing reference signals, such as a demodulation reference signal (DMRS), a channel state information-reference signal (CSI-RS), a phase-tracking reference signal (PT-RS), or a newly designed reference signal.

[0164] For example, taking the CSI-RS signal as the reference signal, the reference signal configuration information can be implemented through the IE CSI-AssociatedReportConfigInfo of the RRC signaling. That is, a resource set is configured for each TRP, and multiple CSI-RS resources within the same resource set are indicated by the same TCI. The code for the reference signal configuration information is as follows:

[0165]

[0166] Frequency offset reporting configuration information is implemented through the IE CSI-ReportConfig of RRC signaling. It specifies that the quantization table index selected by the UE is reported in the form of a 1-bit string, the frequency offset is reported in the form of a 9-bit string, and the indication of whether each TRP needs to adjust the frequency offset value is reported in the form of a 3-bit string.

[0167]

[0168]

[0169] Step a12: The base station instructs each TRP to send multiple reference signals to the UE at multiple different times.

[0170] Among them, such as Figure 6 The diagram shows TRP1, TRP2, ..., TRPN transmitting reference signals to the UE at different times. TRPi is shown at time t... i,j Time (t) i,j ≥0, i=1,2,...,N, j=1,2,...,M), send reference signal RS to UE. i,1 RS i,2 , ..., RSi,M , (M≥2).

[0171] The time difference between any two reference signals is It should be noted that, Figure 6 The diagram only shows the case where each TRP transmits two reference signals to the UE according to its own time difference. Wherein, the transmission time t... i,j Time difference It can be obtained through prior information exchange between each TRP and UE, or it can be obtained by each TRP and UE from a higher layer, or it can be obtained by the UE by receiving and measuring the reference signals sent by each TRP.

[0172] For example, based on Figure 5 The application scenario shown assumes that each TRP sends a TRS signal to the UE twice.

[0173] Specifically, TRP1 sends a TRS signal to the UE at t1 = 0ms, denoted as TRS11; and sends the same TRS signal with the same configuration to the UE again at t1 + Δt1 (Δt1 = 10ms), denoted as TRS12.

[0174] TRP2 sends a TRS signal to the UE at time t2 = 3ms, denoted as TRS21; and sends the same TRS signal to the UE again at time t2 + Δt2 (Δt2 = 10ms), denoted as TRS22.

[0175] TRP3 sends a TRS signal to the UE at time t3 = 6ms, denoted as TRS31; and sends the same TRS signal to the UE again at time t3 + Δt3 (Δt3 = 10ms), denoted as TRS32.

[0176] In this context, "identical configuration" means that each TRS burst within a TRP can be composed of two adjacent time slots of length 2. Each slot contains two TRS symbols with identical TRS symbol and RE positions (e.g., both located at symbol positions {4, 8}), a symbol period of 10 ms, placement with a 4-RE interval, a bandwidth of 52 PRB, and a subcarrier spacing of 30 kHz. The two TRS signals within the same TRP have the same center frequency.

[0177] Step a13: After receiving the reference signals sent by each TRP, the UE calculates the frequency offset of each TRP according to the configuration information.

[0178] Specifically, the UE performs channel estimation based on the reference signals and reference signal configuration information received from each TRP, and calculates the phase difference between each TRP. Simultaneously, the UE also measures the angle of arrival of each TRP at the UE side and the UE's moving speed.

[0179] Specifically, the UE configures each TRP with the reference signals received from each TRP and the reference signal configuration information sent by the base station, and performs cross-correlation with each local reference signal to obtain at least two reference signals for each TRP. and reference signal Phase difference between

[0180] The UE can estimate the angle of arrival θ of each TRP using at least one reference signal from each TRP. i When calculating the angle of arrival using at least one reference signal, it can be obtained by measuring and estimating one of the reference signals, or by averaging the angles of arrival from at least two reference signals, or by establishing angle measurement equations for at least two reference signals and obtaining the angle of arrival using least squares or other optimization methods.

[0181] In this way, the UE uses the time difference between the two reference signals of each TRP. Phase difference between two reference signals Angle of arrival θ i Center frequency f i Wavelength λ i Doppler frequency shift The speed of light c and the speed of the UE v i The relationship between them is shown in formula (1), and the center frequency f is calculated. i As shown in formula (2).

[0182]

[0183]

[0184] It should be noted that when there are two or more reference signals for each TRP, the center frequency calculated from one of the reference signals can be used as the final center frequency of the TRP, or the average of the center frequencies of two or more reference signals can be used as the final center frequency of the TRP.

[0185] Assuming the frequency offset parameter in the frequency offset feedback configuration information is represented as the ratio of the difference to the center frequency of the first selected TRP or the second selected TRP, the calculated frequency offset can be recorded as:

[0186] For example, based on Figure 5In the application scenario shown, the Angle-of-Arrival (AoA) measurement or estimation is performed: For two reference signals TRSi1 and TRSi2 received from TRPi, where i = 1, 2, 3, the UE can determine the Angle-of-Arrival (AoA) of TRPi by weighted summation of the TRSi1 and / or TRSi2 signals received from different antennas. Furthermore, the UE can also obtain the Angle-of-Arrival (AoA) θi through methods such as channel estimation, receiver beamforming, and spatial filtering. Thus, the Angles of Arrival for the three TRPs can be measured as θ1 = -π / 3, θ2 = -π / 2, and θ3 = -2π / 3.

[0187] Phase difference measurement: The UE performs a Fast Fourier Transform (FFT) on two reference signals from the same TRP to convert the time-domain signal into a frequency-domain signal, and then performs peak search. Since the two reference signals come from the same TRP, their center frequencies are the same, and peaks will appear at the same location, but the phases corresponding to the peaks are different. The phase difference between the two peaks is the phase difference caused by the displacement due to the UE's velocity. Thus, assuming the phase differences measured by the UE for the three TRPs are as follows:

[0188] Thus, after measuring the angle of arrival and phase difference, the UE calculates the relationship according to the following formula: The frequency offsets of TRP2 and TRP3 relative to TRP1 were calculated and are as follows:

[0189] Step a14: The UE reports the first feedback information to the base station to which each TRP belongs via the uplink control information UCI carried by the PUCCH or PUSCH.

[0190] The first feedback information is used to provide feedback on the frequency offset value of at least one TRP.

[0191] For example, Figure 5 In the application scenario shown, the UE selects frequency offset quantization table 1, which has a smaller range and granularity, based on the calculated frequency offset value. The corresponding quantization table index is 0, and the identifiers for the frequency offset values ​​of the three TRPs are {'010', '011', '000'}, respectively. The UE sets the frequency offset threshold to ±0.05ppm according to its own needs. Since the frequency offset values ​​of TRP1 and TRP2 do not exceed the threshold, but the frequency offset value of TRP3 exceeds the threshold, the UE sets the local oscillator frequency adjustment operation indicator to '001'. The UE reports the quantization table index and / or the quantized frequency offset values ​​of all TRPs and / or the frequency offset adjustment indicators of all TRPs through PUCCH format 2.

[0192] In this way, by sending reference signals from each TRP to the terminal to measure the frequency offset between TRPs, the latency is effectively shortened, ensuring the accuracy of the TRP frequency offset. It eliminates the need to determine the actual frequency point of the TRP or the actual speed of the terminal device, directly calculating the frequency ratio between multiple TRPs, effectively reducing signaling and computational overhead. Furthermore, this application proposes an enhanced scheme for frequency offset calibration on the terminal side, designing a configuration for reporting terminal-side frequency offset measurement results, thus addressing the shortcomings of existing protocols in terminal-side reporting configuration.

[0193] It should be noted that the descriptions of the same steps and contents as in other embodiments in this embodiment can be found in the descriptions in other embodiments, and will not be repeated here.

[0194] The frequency offset estimation method provided in this application involves a terminal device sending first indication information to a first network device. The first indication information indicates the frequency offset estimation parameter value of at least one first TRP corresponding to the first network device. By having the terminal device send the determined frequency offset estimation parameter values ​​of at least one first TRP to the first network device, this solves the problem that the network side and UE side currently need to transmit multiple reference signals to each other to achieve frequency offset estimation. This proposed frequency offset estimation method, by estimating the frequency offset on the UE side, eliminates the need for the UE side to send reference signals to the network side, effectively saving uplink resources on the UE side.

[0195] Based on the foregoing embodiments, embodiments of this application provide a frequency offset estimation device, which can be applied to... Figures 1-4 In the frequency offset estimation method provided in the corresponding embodiment, refer to Figure 7 As shown, the frequency offset estimation device may include: a transmitting unit 31; wherein:

[0196] The sending unit 31 is used to send first indication information to the first network device; wherein the first indication information is used to indicate the frequency offset estimation parameter value of at least one first transceiver node TRP corresponding to the first network device.

[0197] In other embodiments of this application, the frequency offset estimation device further includes: an establishment unit, a receiving unit, and a generation unit; wherein:

[0198] A communication link establishment unit is used to establish communication links with m second TRPs respectively; where m is an integer greater than or equal to 2, and the m second TRPs include at least one first TRP;

[0199] The receiving unit is used to receive two or more reference signals transmitted by each second TRP at different times, and to obtain the reference signal group corresponding to each second TRP;

[0200] The generation unit is configured to generate first indication information, including frequency offset estimation parameter values ​​of at least one first TRP, based on the second indication information and m groups of reference signals; wherein the second indication information is configuration information of m second TRPs.

[0201] In other embodiments of this application, before the generating unit, the receiving unit is further configured to receive second indication information sent by one or more second network devices; wherein, the one or more second network devices include the first network device.

[0202] In other embodiments of this application, the second indication information includes at least m reference signal configuration information for second TRPs, and / or frequency offset feedback configuration information for indicating frequency offset parameters reported by the terminal device.

[0203] In other embodiments of this application, the frequency offset estimation device further includes: a determination unit; wherein:

[0204] The determining unit is used to determine the frequency offset feedback configuration information based on the device characteristic parameters of the terminal device if the second indication information does not include the frequency offset feedback configuration information.

[0205] In other embodiments of this application, the frequency offset feedback configuration information includes at least one of the following: frequency offset parameter reporting information, frequency offset parameter representation method, frequency offset parameter quantization method, and TRP selection information indicating the selection of TRP.

[0206] In other embodiments of this application, the frequency offset parameter is represented in one of the following ways:

[0207] The frequency offset parameter value is the difference between the center frequency of the first selected TRP and the center frequency of the second selected TRP;

[0208] The frequency offset parameter value is the ratio of the difference to the center frequency of the first selected TRP or the second selected TRP;

[0209] The frequency offset sub-parameter is the ratio of the difference to the subcarrier spacing (SCS).

[0210] The frequency offset sub-parameter value is one-nth of the subcarrier spacing SCS; where n is an integer greater than or equal to 1.

[0211] The frequency offset parameter value is m times one-mth of the symbol interval.

[0212] In other embodiments of this application, when the device characteristic parameters do not include the moving speed parameter of the terminal device, the frequency offset parameter is expressed as: the difference between 1 and the ratio of the center frequency of the first selected TRP to the center frequency of the second selected TRP, or the difference between 1 and the ratio of the center frequency of the second selected TRP to the center frequency of the first selected TRP.

[0213] In other embodiments of this application, the frequency offset parameter quantization method includes one of the following information:

[0214] For each first TRP, the minimum frequency offset parameter value, the maximum frequency offset parameter value, the range between the minimum and maximum frequency offset parameter values ​​divided into K-2 parts, and the target frequency offset quantization method for quantizing each frequency offset sub-parameter value are defined. Among these, the minimum and maximum frequency offset parameter values ​​correspond to the frequency offset sub-parameter values, and the minimum and maximum frequency offset parameter values ​​are absolute or non-absolute values, where K is an integer greater than or equal to 2.

[0215] The quantization relationship between one or more frequency offset sub-parameter values ​​and the quantization frequency offset value.

[0216] In other embodiments of this application, the target frequency offset quantization method indicates that the length of the quantized frequency offset value corresponding to each frequency offset sub-parameter value is log2(K) bits, and the quantized frequency offset value corresponding to each frequency offset sub-parameter value is a preset quantized frequency offset value. The preset quantized frequency offset value is the minimum quantized frequency offset value included in the equal interval after the corresponding frequency offset sub-parameter value is divided into K-2 parts within the range from the minimum frequency offset parameter value to the maximum frequency offset parameter value.

[0217] In other embodiments of this application, the TRP selection information includes one of the following:

[0218] All TRPs that establish a communication link with the terminal device;

[0219] The comparison and selection relationship between the frequency offset estimation parameter value and the frequency offset threshold; wherein, the frequency offset estimation parameter value is the frequency offset sub-parameter value or the quantized frequency offset value corresponding to each frequency offset sub-parameter value;

[0220] The preset number of TRPs to be reported and the selection requirements for the preset number of TRPs.

[0221] In other embodiments of this application, the frequency offset parameter reporting information is in one of the following forms:

[0222] The configuration information indicates the reference TRP, reports the frequency offset parameter value of the selected TRP relative to the reference TRP, and the TRP index of the selected TRP; where the selected TRP is the TRP selected according to the TRP selection information;

[0223] The configuration information does not indicate the reference TRP. The report shows the frequency offset parameter value obtained by combining the TRPs selected according to the TRP selection information in pairs and the corresponding TRP indexes of the two TRPs.

[0224] The frequency offset parameter values ​​of the TRPs selected according to the TRP selection information are reported sequentially using a preset TRP distribution order.

[0225] In other embodiments of this application, the frequency offset parameter value is the quantized frequency offset value, and the minimum frequency offset parameter value corresponding to each first TRP is the actual minimum frequency offset parameter value of each first TRP. When the maximum frequency offset parameter value corresponding to each first TRP is the actual maximum frequency offset parameter value of each first TRP, the frequency offset parameter reporting information also includes the actual minimum frequency offset parameter value and the actual maximum frequency offset parameter value of each first TRP.

[0226] In other embodiments of this application, the generation unit includes: a calculation module, a determination module, and a generation module; wherein:

[0227] The calculation module is used to calculate the center frequency of each second TRP based on the reference signal configuration information of each second TRP and the corresponding reference signal group;

[0228] The determination module is used to determine the frequency offset estimation parameter value of at least one first TRP based on the frequency offset feedback configuration information and the center frequencies of m second TRPs; wherein the frequency offset estimation parameter value is the frequency offset sub-parameter value corresponding to each first TRP, or the quantized frequency offset value corresponding to each frequency offset sub-parameter value;

[0229] A generation module is used to generate first indication information based on the frequency offset estimation parameter value of at least one first TRP.

[0230] In other embodiments of this application, the first indication information belongs to the uplink control information (UCI) carried by the physical uplink control channel PUCCH, or the UCI carried by the physical uplink shared channel PUSCH.

[0231] It should be noted that the process of information interaction between units and modules in this embodiment can be referred to the description in other embodiments, and will not be repeated here.

[0232] The frequency offset estimation apparatus provided in this application sends first indication information to a first network device via a terminal device. The first indication information indicates the frequency offset estimation parameter value of at least one first TRP corresponding to the first network device. In this way, by sending the determined frequency offset estimation parameter value of at least one first TRP to the first network device via the terminal device, the problem of the network side and UE side needing to transmit multiple reference signals to achieve frequency offset estimation is solved. A frequency offset estimation method is proposed that, by estimating the frequency offset on the UE side, the UE side does not need to send reference signals to the network side, effectively saving uplink resources on the UE side.

[0233] Based on the foregoing embodiments, embodiments of this application provide a terminal device that can be applied to... Figures 1-4 In the frequency offset estimation method provided in the corresponding embodiment, refer to Figure 8As shown, the terminal device 4 may include: a communication interface 41, a memory 42, a processor 43, and a communication bus 44; wherein:

[0234] Memory 42 is used to store executable information;

[0235] The communication bus 44 is used to realize the communication connection between the communication interface 41, the processor 43 and the memory 42;

[0236] Processor 43 is used to execute the frequency offset estimation program stored in memory 42, to implement, for example... Figures 1-2 The implementation process of the frequency offset estimation method provided in the corresponding embodiment will not be described in detail here.

[0237] Based on the foregoing embodiments, embodiments of this application provide a frequency offset estimation system, which can be applied to... Figures 1-4 In the frequency offset estimation method provided in the corresponding embodiment, refer to Figure 9 As shown, the frequency offset estimation system 5 includes at least: a terminal device 51 and a first network device 52; wherein:

[0238] Terminal device 51, used to implement such Figures 1-2 The implementation process of the frequency offset estimation method provided in the corresponding embodiment will not be described in detail here;

[0239] The first network device is used to receive the first instruction information sent by the terminal device, perform frequency offset correction, and provide communication network services to the terminal device.

[0240] It should be noted that terminal device 51 and terminal device 4 are the same device.

[0241] Based on the foregoing embodiments, embodiments of this application provide a computer-readable storage medium, simply referred to as a storage medium, which stores one or more programs that can be executed by one or more processors to implement the reference. Figures 1-4 The implementation process of the frequency offset estimation method provided in the corresponding embodiment will not be described in detail here.

[0242] Based on the foregoing embodiments, this application also provides a computer program product, including a computer program that can be executed by the processor 43 of the terminal device 4 to complete any of the foregoing method steps.

[0243] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0244] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0245] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0246] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0247] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application.

Claims

1. A frequency offset estimation method, characterized in that, The method is applied to a terminal device, and the method includes: Send a first indication message to a first network device; wherein the first indication message is used to indicate the frequency offset estimation parameter value of at least one first transceiver node TRP corresponding to the first network device.

2. The method according to claim 1, characterized in that, The method further includes: Establish communication links with each of the m second TRPs; where m is an integer greater than or equal to 2, and the m second TRPs include at least one of the first TRPs; Receive two or more reference signals sent by each of the second TRPs at different times to obtain a reference signal group corresponding to each of the second TRPs; Based on the second indication information and the m groups of reference signals, a first indication information is generated that includes the frequency offset estimation parameter value of at least one of the first TRPs; wherein the second indication information is the configuration information of the m second TRPs.

3. The method according to claim 2, characterized in that, Before generating first indication information including at least one frequency offset estimation parameter value of the first TRP based on the second indication information and m groups of the reference signal groups, the method further includes: Receive the second indication information sent by one or more second network devices; wherein the one or more second network devices include the first network device.

4. The method according to claim 2, characterized in that, The second indication information includes at least m reference signal configuration information of the second TRP, and / or frequency offset feedback configuration information for indicating the frequency offset parameters reported by the terminal device.

5. The method according to claim 4, characterized in that, The method further includes: If the frequency offset feedback configuration information is not included in the second indication information, the frequency offset feedback configuration information is determined based on the device characteristic parameters of the terminal device.

6. The method according to claim 4 or 5, characterized in that, The frequency offset feedback configuration information includes at least one of the following: frequency offset parameter reporting information, frequency offset parameter representation method, frequency offset parameter quantization method, and TRP selection information indicating the selection of TRP.

7. The method according to claim 6, characterized in that, The frequency offset parameter can be represented in one of the following ways: The frequency offset parameter value is the difference between the center frequency of the first selected TRP and the center frequency of the second selected TRP; The frequency offset parameter value is the ratio of the difference to the center frequency of the first selected TRP or the second selected TRP; The frequency offset sub-parameter value is the ratio of the difference to the subcarrier spacing SCS; The frequency offset sub-parameter value is one-nth of the subcarrier spacing SCS; where n is an integer greater than or equal to 1. The frequency offset parameter value is m times one-mth of the symbol interval.

8. The method according to claim 5, characterized in that, When the device characteristic parameters do not include the moving speed parameter of the terminal device, the frequency offset parameter is expressed as: the difference between 1 and the ratio of the center frequency of the first selected TRP to the center frequency of the second selected TRP, or the difference between 1 and the ratio of the center frequency of the second selected TRP to the center frequency of the first selected TRP.

9. The method according to claim 7, characterized in that, The frequency offset parameter quantization method includes one of the following information: Each of the first TRPs includes a minimum frequency offset parameter value, a maximum frequency offset parameter value, a range between the minimum and maximum frequency offset parameter values ​​divided into K-2 parts, and a target frequency offset quantization method for quantizing each frequency offset sub-parameter value; wherein the minimum and maximum frequency offset parameter values ​​correspond to the frequency offset sub-parameter values, the minimum and maximum frequency offset parameter values ​​are absolute or non-absolute values, and K is an integer greater than or equal to 2; The quantization relationship between one or more frequency offset sub-parameter values ​​and the quantization frequency offset value.

10. The method according to claim 9, characterized in that, In the target frequency offset quantization method, the length of the quantized frequency offset value corresponding to each frequency offset sub-parameter value is log2(K) bits. The quantized frequency offset value corresponding to each frequency offset sub-parameter value is a preset quantized frequency offset value. The preset quantized frequency offset value is the minimum quantized frequency offset value included in the evenly divided interval of the corresponding frequency offset sub-parameter value after dividing the range from the minimum frequency offset parameter value to the maximum frequency offset parameter value into K-2 parts.

11. The method according to any one of claims 7 to 9, characterized in that, The TRP selection information includes one of the following: All TRPs that establish a communication link with the terminal device; A comparison and selection relationship between frequency offset estimation parameter values ​​and frequency offset thresholds; wherein, the frequency offset estimation parameter value is the frequency offset sub-parameter value or the quantized frequency offset value corresponding to each of the frequency offset sub-parameter values; The preset number of TRPs to be reported and the selection requirements for the preset number of TRPs.

12. The method according to claim 11, characterized in that, The frequency offset parameter reporting information is in one of the following formats: The configuration information indicates a reference TRP, and reports the frequency offset parameter value of the selected TRP relative to the reference TRP and the TRP index of the selected TRP; wherein, the selected TRP is a TRP selected according to the TRP selection information; The configuration information does not indicate the reference TRP, and reports the frequency offset parameter value obtained by combining the TRPs selected according to the TRP selection information in pairs and the TRP index of the corresponding two TRPs; The frequency offset parameter values ​​of the TRPs selected according to the TRP selection information are reported sequentially using a preset TRP distribution order.

13. The method according to claim 12, characterized in that, The frequency offset parameter value is the quantized frequency offset value, and when the minimum frequency offset parameter value corresponding to each first TRP is the actual minimum frequency offset parameter value of each first TRP, and the maximum frequency offset parameter value corresponding to each first TRP is the actual maximum frequency offset parameter value of each first TRP, the frequency offset parameter reporting information also includes the actual minimum frequency offset parameter value and the actual maximum frequency offset parameter value of each first TRP.

14. The method according to claim 7, characterized in that, The generation of first indication information, which includes at least one frequency offset estimation parameter value of the first TRP, based on the second indication information and m groups of the reference signal groups, includes: Based on the reference signal configuration information of each second TRP and the corresponding reference signal group, the center frequency of each second TRP is calculated; Based on the frequency offset feedback configuration information and the center frequencies of m second TRPs, at least one frequency offset estimation parameter value of the first TRP is determined; wherein, the frequency offset estimation parameter value is the frequency offset sub-parameter value corresponding to each first TRP, or the quantized frequency offset value corresponding to each frequency offset sub-parameter value; The first indication information is generated based on the frequency offset estimation parameter value of at least one of the first TRPs.

15. The method according to claim 13, characterized in that, The first indication information belongs to the uplink control information (UCI) carried by the physical uplink control channel PUCCH, or the UCI carried by the physical uplink shared channel PUSCH.

16. A frequency offset estimation device, characterized in that, The device is applied to a terminal equipment, and the device includes: a transmitting unit; wherein: The sending unit is configured to send first indication information to the first network device; wherein the first indication information is configured to indicate the frequency offset estimation parameter value of at least one first transceiver node TRP corresponding to the first network device.

17. A terminal device, characterized in that, The device includes: a communication interface, a memory, a processor, and a communication bus; wherein: Memory, used to store executable information; The communication bus is used to implement communication connections between the communication interface, processor, and memory. A processor is configured to execute a frequency offset estimation program stored in memory, implementing the steps of the frequency offset estimation method as described in any one of claims 1 to 15.

18. A frequency offset estimation system, characterized in that, The system includes at least: a terminal device and a first network device; wherein: The terminal device is used to implement the steps of the frequency offset estimation method as described in any one of claims 1 to 15; The first network device is configured to receive first indication information sent by the terminal device, perform frequency offset correction, and provide communication network services to the terminal device.

19. A storage medium, characterized in that, The storage medium stores a frequency offset estimation program, which, when executed, is used to implement the steps of the frequency offset estimation method as described in any one of claims 1 to 15.

20. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the frequency offset estimation method as described in any one of claims 1 to 15.

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