Frequency offset estimation method, device, equipment, communication system, medium and product

Abstract

Disclosed are a frequency offset estimation method, apparatus, device, communication system, medium and product, relating to the technical field of wireless communications, the disclosed frequency offset estimation method comprising: acquiring prior frequency offset estimation information of a terminal station under the condition of receiving current uplink service data of the terminal station; and determining a current frequency offset estimation value of the current uplink service data based on the current uplink service data in combination with the prior frequency offset estimation information. Compared with the method that CFO estimation is carried out on each uplink time slot through a plurality of reference signals, a base station side only needs to demodulate one reference signal for one terminal station, so that the base station can process more terminal nodes under the condition of the same hardware and time-frequency resources, and the resource utilization rate of the base station is improved.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a frequency offset estimation method, device, equipment, communication system, medium and product. Background Art

[0002] In wireless communication systems, the inconsistency of the local oscillators at both ends of the transmitter and receiver and the Doppler effect in mobile scenarios will lead to frequency deviation. If the impact of the frequency deviation cannot be eliminated or reduced, when the frequency deviation is large, it will seriously affect the demodulation performance of the system.

[0003] Related wireless communication technologies usually insert reference signals between OFDM (Orthogonal Frequency Division Multiplexing) symbols at certain intervals to perform frequency offset estimation. However, if the base station uses multiple reference signals to estimate and compensate for CFO (carrier frequency offset) for each OFDM symbol, it will increase the complexity of base station demodulation, causing the number of terminal nodes that the base station can handle to decrease within the same hardware and time-frequency resources, resulting in low resource utilization of the base station. Summary of the invention

[0004] The main purpose of the present application is to provide a frequency offset estimation method, device, equipment, communication system, medium and product, aiming to solve the technical problem of low resource utilization of base stations.

[0005] To achieve the above object, the present application proposes a frequency offset estimation method, which includes:

[0006] When receiving current uplink service data of the terminal station, obtaining a priori frequency offset estimation information of the terminal station;

[0007] Based on the current uplink service data and in combination with the priori frequency offset estimation information, a current frequency offset estimation value of the current uplink service data is determined.

[0008] In one implementation, the step of determining a current frequency offset estimation value of the current uplink service data based on the current uplink service data and in combination with the priori frequency offset estimation information includes:

[0009] When the current uplink service data is real-time uplink service data, the current frequency offset estimation value of the current uplink service data is determined based on the current uplink service data and combined with prior frequency offset estimation information. The real-time uplink service data is uplink service data uploaded periodically.

[0010] In one implementation, when the current uplink service data is real-time uplink service data, the step of determining the current frequency offset estimation value of the current uplink service data based on the current uplink service data and in combination with the priori frequency offset estimation information includes:

[0011] When the current uplink service data is real-time uplink service data, performing channel estimation based on a current reference signal corresponding to the current uplink service data to obtain a current channel estimation result;

[0012] Based on the current channel estimation result and the priori frequency offset estimation information, a current frequency offset estimation value of the current uplink service data is determined.

[0013] In one embodiment,

[0014] The a priori frequency offset estimation information includes: historical channel estimation results;

[0015] The step of determining a current frequency offset estimation value of current uplink service data based on a current channel estimation result and a priori frequency offset estimation information comprises:

[0016] Based on the current channel estimation result and the historical channel estimation results, a current frequency offset estimation value of the current uplink service data is determined.

[0017] In one embodiment, the current channel estimation result is a current channel estimation matrix, and / or the historical channel estimation result is a historical channel estimation matrix;

[0018] The step of determining a current frequency offset estimation value of current uplink service data based on a current channel estimation result and a historical channel estimation result includes:

[0019] Based on the current channel estimation matrix and the historical channel estimation matrix, a superposition channel response matrix of subcarriers whose transmission resources overlap between the current reference signal and the historical reference signal is calculated;

[0020] Based on the superimposed channel response matrix, a current frequency offset estimate of current uplink service data is determined.

[0021] In one implementation, the step of determining a current frequency offset estimate of current uplink service data based on a superimposed channel response matrix includes:

[0022] Based on the angle parameter corresponding to the superimposed channel response matrix, the number of sampling points of the reference signal, the cyclic prefix length of the uplink service data, and the number of interval symbols between the current uplink service data and the historical uplink service data, the current frequency offset estimate of the current uplink service data is estimated.

[0023] In one implementation, the a priori frequency offset estimation information includes: historical frequency offset estimation values ​​of real-time uplink service data;

[0024] The step of determining a current frequency offset estimation value of the current uplink service data based on the current uplink service data and in combination with the priori frequency offset estimation information comprises:

[0025] In the case that the current uplink service data is non-real-time uplink service data, the historical frequency offset estimation value is used as the current frequency offset estimation value of the current uplink service data.

[0026] In one embodiment, at least one of the following is included:

[0027] The frequency domain resources of the current uplink service data and the frequency domain resources of the historical uplink service data corresponding to the priori frequency offset estimation information at least partially overlap;

[0028] The reference signal in the current uplink service data and / or the reference signal in the historical uplink service data corresponding to the priori frequency offset estimation information is single.

[0029] In one implementation, when current uplink service data of a terminal station is received, before the step of obtaining a priori frequency offset estimation information of the current uplink service data, the frequency offset estimation method further includes:

[0030] Obtaining periodic information of real-time services of terminal stations, where real-time services are periodic uplink services;

[0031] Allocate resources for real-time services based on cycle information and system parameters.

[0032] In one implementation, the step of configuring resources for real-time services based on period information and system parameters includes:

[0033] For at least two real-time uplink service data corresponding to the real-time service, at least partially overlapping frequency domain resources are configured based on the period information and the system parameters.

[0034] In one implementation, the real-time uplink service data is uploaded by means of data retransmission;

[0035] When the number of the terminal station is one, the data retransmission mode of the real-time uplink service data includes at least one of inter-frame transmission, cross-frame transmission and same-frame transmission;

[0036] When the number of terminal stations is at least two, if the real-time uplink service data is new uplink service data, it is transmitted through even-numbered frames; if the real-time uplink service data is retransmitted uplink service data, it is transmitted through odd-numbered frames.

[0037] In one implementation, before the step of acquiring period information of the real-time service of the terminal station, the frequency offset estimation method further includes:

[0038] Based on any one or a combination of communication cycle, number of terminal stations, reliability requirements, scenario information, and business mode, the frequency offset estimation mode is configured as a priori frequency offset estimation mode.

[0039] In addition, to achieve the above purpose, the present application also proposes a frequency offset estimation device, the frequency offset estimation device comprising:

[0040] An acquisition module, used to acquire a priori frequency offset estimation information of the terminal station when receiving current uplink service data of the terminal station;

[0041] The estimation module is used to determine the current frequency offset estimation value of the current uplink service data based on the current uplink service data and in combination with the prior frequency offset estimation information.

[0042] In addition, to achieve the above objectives, the present application also proposes a frequency offset estimation device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the frequency offset estimation method as described above.

[0043] In addition, to achieve the above purpose, the present application also proposes a communication system, the communication system comprising:

[0044] A management station is provided with the frequency deviation estimation device as described above.

[0045] In addition, to achieve the above purpose, the present application also proposes a storage medium, which is a computer-readable storage medium. A computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the frequency offset estimation method as described above are implemented.

[0046] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the frequency offset estimation method as described above are implemented.

[0047] One or more technical solutions proposed in this application have at least the following technical effects:

[0048] The present application provides a frequency offset estimation method, apparatus, equipment, communication system, medium and product, which obtain the prior frequency offset estimation information of the terminal station when the current uplink service data of the terminal station is received; based on the current uplink service data, combined with the prior frequency offset estimation information, determine the current frequency offset estimation value of the current uplink service data.

[0049] Therefore, the present application estimates the current frequency offset estimation value of the current uplink service data by combining the current uplink service data and the prior frequency offset estimation information of the terminal station on the base station side. Since the prior frequency offset estimation information is taken into account, only a single reference signal needs to be inserted into the current uplink service data to accurately estimate the current frequency offset estimation value of the current uplink service data. Compared with CFO estimation through multiple reference signals for each uplink time slot, the base station side only needs to demodulate one reference signal for one terminal station, so that the base station can process more terminal nodes within the same hardware and time-frequency resources, thereby improving the resource utilization of the base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0052] Figure 1 Performance curves of the communication system against frequency offset under different reference signal configurations;

[0053] Figure 2 is an exemplary 5G NR PUSCH DMRS configuration table;

[0054] Figure 3 is a schematic diagram of an exemplary 5G NR PUSCH DMRS configuration;

[0055] Figure 4 This is a schematic diagram of an exemplary WIFI long and short preamble sequence;

[0056] Figure 5 This is a flow chart of the first embodiment of the frequency offset estimation method of the present application;

[0057] Figure 6 This is an exemplary frequency offset estimation schematic diagram of a frequency offset estimation method of the present application;

[0058] Figure 7 This is a schematic diagram of exemplary scheduling information of a frequency offset estimation method of the present application;

[0059] Figure 8 is a schematic diagram of an exemplary frequency domain resource allocation for alternate frame transmission;

[0060] Fig. 9is another exemplary schematic diagram of frequency domain resource allocation for alternate frame transmission;

[0061] Fig.10 is a schematic diagram of an exemplary frequency domain resource allocation for cross-frame transmission;

[0062] Fig.11 is a schematic diagram of an exemplary frequency domain resource allocation for same-frame transmission;

[0063] Fig.12 is another exemplary schematic diagram of frequency domain resource allocation for cross-frame transmission;

[0064] Fig.13 Schematic diagram of data retransmission method when there are at least two terminal stations;

[0065] Fig.14 This is a schematic diagram of the module structure of the frequency offset estimation device according to an embodiment of the present application;

[0066] Fig.15 Schematic diagram of the device structure of the hardware operating environment involved in the frequency offset estimation method in the embodiment of the present application.

[0067] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0068] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0069] In this application, the term "comprises", "includes" or any other variation thereof is intended to cover non-exclusive inclusion, so that a device or system including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a device or system. In the absence of more restrictions, an element defined by the sentence "includes..." does not exclude the presence of other identical elements in the device or system including the element.

[0070] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0071] The main solution of the embodiment of the present application is: when receiving the current uplink service data of the terminal station, obtaining the prior frequency offset estimation information of the terminal station; based on the current uplink service data, combined with the prior frequency offset estimation information, determining the current frequency offset estimation value of the current uplink service data.

[0072] In wireless communication systems, the inconsistency of the local oscillators at both ends of the transmitter and receiver and the Doppler effect in mobile scenarios will lead to frequency deviation. If the impact of the frequency deviation cannot be eliminated or reduced, when the frequency deviation is large, it will seriously affect the demodulation performance of the system.

[0073] In addition, in industrial communication networks, wireless technology is slowly penetrating from the IT (Information Technology) layer to the OT (Operational Technology) layer. The OT layer communication has a particularly high requirement for system reliability, reaching 99.9999% or above. If frequency offset estimation and compensation are not performed, the application of wireless technology in the industrial field will be greatly affected. Figure 1 As shown, Figure 1 The performance curves of the communication system against frequency offset under different reference signal configurations are shown. CFO (carrier frequency offset) estimation and compensation are performed using a single symbol reference signal and two symbol reference signals respectively. It can be seen that the demodulation performance is significantly improved compared with that of a single reference signal when CFO estimation and compensation is performed using two symbol reference signals, and the demodulation performance can be further improved when the interval between reference signals changes. Therefore, inserting reference signals between OFDM symbols at a certain interval for CFO estimation and compensation can greatly improve the demodulation performance on the base station side.

[0074] Specifically, the frequency deviation in the frequency domain is manifested as a phase rotation that changes with time in the time domain. Therefore, in related industrial communication networks, wireless communication technology generally sends a known reference signal at a certain interval within a time slot or a specific frame. At the receiving end, a certain algorithm operation is performed on the reference signal at different times to obtain the frequency deviation estimate. Figures 2 to 4 As shown, Figure 2 is an exemplary 5G NR PUSCH DMRS configuration table, Figure 3 is a schematic diagram of an exemplary 5G NR PUSCH DMRS configuration, Figure 4 This is a schematic diagram of an exemplary WIFI long and short preamble sequence. It can be seen that in the 5G NR system, 1 to 3 additional DMRS (Demodulation Reference Signal) can be configured to cope with frequency offset estimation under different degrees of channel conditions. Among them, the 8th to 10th short preamble sequences of WIFI can be used for coarse frequency offset estimation, and the long preamble sequence can be used for fine frequency offset estimation.

[0075] It can be seen that configuring multiple known DMRS for frequency offset estimation can accurately measure the frequency offset value for data compensation, reducing the impact of frequency offset on the demodulation performance of the wireless system, but it will also occupy system resources, resulting in a decrease in the resource utilization of the base station on the base station side, affecting the communication system rate or the number of supported terminal stations. For example, if a slot contains 14 symbols, the resource utilization of the base station is 92.9% when there is only one reference signal, and the resource utilization of the base station is 85.7% when there are two reference signals, a decrease of 7.2%; however, if multiple reference signals are used for CFO estimation and compensation for the terminal station in each uplink slot on the base station side, the complexity of demodulation on the base station side will increase, resulting in a decrease in the number of terminal nodes that can be processed by the base station side within the same hardware and time-frequency resources.

[0076] Therefore, the present application provides a solution, which estimates the current frequency offset estimation value of the current uplink service data by combining the current uplink service data and the prior frequency offset estimation information of the terminal station on the base station side. Since the prior frequency offset estimation information is taken into account, only a single reference signal needs to be inserted into the current uplink service data to accurately estimate the current frequency offset estimation value of the current uplink service data. Compared with CFO estimation through multiple reference signals for each uplink time slot, the base station side only needs to demodulate one reference signal for one terminal station, so that the base station can process more terminal nodes within the same hardware and time-frequency resources, thereby improving the resource utilization of the base station.

[0077] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of implementing the above functions, a frequency offset estimation device, etc. The following takes the frequency offset estimation device as an example to illustrate this embodiment and the following embodiments.

[0078] Based on this, the embodiment of the present application provides a frequency offset estimation method, referring to Figure 5 and Figure 6 , Figure 5 This is a flow chart of the first embodiment of the frequency offset estimation method of the present application. Figure 6 This is an exemplary frequency offset estimation diagram of the frequency offset estimation method of the present application.

[0079] In this embodiment, Figure 5 As shown, the frequency offset estimation method includes steps S100 to S200:

[0080] Step S100: upon receiving current uplink service data of a terminal station, obtaining a priori frequency offset estimation information of the terminal station.

[0081] Step S200: Determine a current frequency offset estimation value of the current uplink service data based on the current uplink service data and in combination with a priori frequency offset estimation information.

[0082] It should be noted that the frequency offset estimation device can be set at the MS (Management Station) side, i.e., the base station side, in the communication system to perform frequency offset estimation and frequency offset compensation on the uplink service data uploaded by at least one TS (Terminal Station) in the communication system. The current uplink service data is the uplink service data received at the current moment, and the a priori frequency offset estimation information may include a priori frequency offset estimation value and / or a priori channel estimation result.

[0083] It is understandable that the frequency offset estimation device can perform frequency offset estimation in combination with current uplink service data and prior frequency offset estimation information to obtain current frequency offset estimation information, and update the prior frequency offset estimation information based on the current frequency offset estimation information.

[0084] In addition, it can be understood that the specific implementation of determining the current frequency offset estimation value is as follows.

[0085] In a feasible implementation, step S200 may include step A210:

[0086] Step A210, when the current uplink service data is real-time uplink service data, a current frequency offset estimation value of the current uplink service data is determined based on the current uplink service data and in combination with prior frequency offset estimation information.

[0087] Real-time uplink service data is uplink service data that is uploaded periodically.

[0088] It should be noted that, taking the industrial communication system as an example, since the information such as the communication cycle, the number of TS served by the MS, the reliability requirements, the physical planning of the production line and the business model of the production line in the field of industrial control is deterministic, the control data in the field of industrial control is usually regarded as periodic uplink business data by the frequency deviation estimation device when it is carried by the wireless industrial communication network. That is, most of the control data of the OT layer in the industrial communication system is periodically uploaded uplink business data, which will be periodically sent to the management station side and returned by the management station side. For example, the control data may include the position command for controlling the movement of the motor and the position information fed back after the action is executed.

[0089] It is understandable that the uplink service data of the same terminal station in the industrial communication system may include real-time uplink service data of real-time services and / or non-real-time uplink service data of non-real-time services; wherein the real-time services are periodic, and therefore, the real-time uplink service data is periodically uploaded uplink service data. Therefore, in this embodiment, for real-time services, the current frequency offset estimation value of the current uplink service data is estimated based on the current uplink service data in combination with the prior frequency offset estimation information.

[0090] In a feasible implementation, step A210 may include steps A211 to A212:

[0091] Step A211: When the current uplink service data is real-time uplink service data, channel estimation is performed based on a current reference signal corresponding to the current uplink service data to obtain a current channel estimation result.

[0092] Step A212, based on the current channel estimation result and the priori frequency offset estimation information, determine the current frequency offset estimation value of the current uplink service data.

[0093] It should be noted that the current reference signal is a reference signal in the current uplink service data. When the current uplink service data is real-time uplink service data, the a priori frequency offset estimation information is a priori channel estimation result. The current channel estimation result can represent the channel condition when receiving the current uplink service data.

[0094] It is understandable that by performing channel estimation based on the current reference signal, a current channel estimation result can be obtained. Therefore, by combining the current channel estimation result and the priori channel estimation result, a current frequency offset estimation value of the current uplink service data can be determined.

[0095] In a feasible implementation, the a priori frequency offset estimation information includes: historical channel estimation results. Step A212 may include: determining a current frequency offset estimation value of current uplink service data based on the current channel estimation result and the historical channel estimation results.

[0096] It should be noted that the a priori channel estimation result is the historical channel estimation result of the terminal station at a historical moment before the current moment. The historical channel estimation result can be obtained by channel estimation based on the historical reference signal in the historical uplink service data received at the historical moment, and the historical uplink service data is the uplink service data of the real-time service received at the historical moment.

[0097] In a feasible implementation manner, the reference signal in the current uplink service data and / or the reference signal in the historical uplink service data corresponding to the priori frequency offset estimation information is single.

[0098] It should be noted that, before the industrial communication system enters the service phase, the number of reference signals in the uplink service data of at least one terminal station in the industrial communication system may be configured at the management station.

[0099] In a specific implementation, before the industrial communication system enters the service stage, for the uplink service data of each terminal station, the frequency offset estimation device can configure the reference signal in the uplink service data to be single. After the industrial communication system enters the service stage, when the frequency offset estimation device receives the uplink service data of the terminal station for the first time, it only performs channel estimation on the uplink service data received for the first time, obtains the corresponding first channel estimation result, and does not perform frequency offset estimation and frequency offset compensation, and uses the first channel estimation result as the prior frequency offset estimation information. Thus, when the current uplink service data is subsequently received, the current uplink service data and the prior frequency offset estimation information can be combined to perform frequency offset estimation and frequency offset compensation to obtain the current frequency offset estimation value and the current channel estimation result, and the current frequency offset estimation value and / or the current channel estimation result are used to update the prior frequency offset estimation information.

[0100] In a feasible implementation manner, the frequency domain resources of the current uplink service data at least partially overlap with the frequency domain resources of the historical uplink service data corresponding to the priori frequency offset estimation information.

[0101] It should be noted that before the industrial communication system enters the service phase, the frequency domain resources for uplink service data corresponding to each terminal station can also be configured at the management station. For the uplink service data of the same terminal station, the frequency domain resources of the current uplink service data are configured to overlap completely or partially with the frequency domain resources of the historical uplink service data corresponding to the prior frequency offset estimation information, so as to ensure that the current frequency offset estimation value can be accurately estimated based on the historical channel estimation results and the current channel results.

[0102] In a feasible implementation manner, the current channel estimation result is a current channel estimation matrix, and / or the historical channel estimation result is a historical channel estimation matrix.

[0103] The step of "determining the current frequency offset estimation value of the terminal station based on the current channel estimation result and the historical channel estimation result" may include: calculating the superimposed channel response matrix of the subcarriers whose transmission resources overlap between the current reference signal and the historical reference signal based on the current channel estimation matrix and the historical channel estimation matrix. Based on the superimposed channel response matrix, determine the current frequency offset estimation value of the terminal station.

[0104] It should be noted that the channel estimation result can be represented in the form of a matrix. In the case where the frequency domain resources of the current uplink service data at least partially overlap with the frequency domain resources of the historical uplink service data, there are usually subcarriers with overlapping transmission resources between the current reference signal in the current uplink service data and the historical reference signal in the historical uplink service data, and the channel estimation result corresponding to the subcarriers with overlapping transmission resources is the superimposed channel response between the current reference signal and the historical reference signal. Therefore, the current frequency offset estimation value of the terminal station can be estimated based on the superimposed channel response matrix of the subcarriers with overlapping transmission resources between the current reference signal and the historical reference signal. Among them, the superimposed channel response matrix may include the superimposed channel response corresponding to at least one subcarrier with overlapping transmission resources, which can be calculated based on the current channel estimation matrix and the historical channel estimation matrix.

[0105] In a feasible implementation, the step of "determining the current frequency offset estimate of the terminal station based on the superimposed channel response matrix" may include: estimating the current frequency offset estimate based on the angle parameter corresponding to the superimposed channel response matrix, the number of sampling points of the reference signal, the cyclic prefix length of the uplink service data, and the number of interval symbols between the current uplink service data and the historical uplink service data.

[0106] It should be noted that the number of sampling points is the number of sampling points for sampling the reference signal when channel estimation is performed based on the reference signal, wherein the number of sampling points for channel estimation based on the current reference signal is the same as the number of sampling points for channel estimation based on the historical reference signal. The cyclic prefix length can be determined based on the frame structure of the uplink signal in the industrial communication system, and the uplink signal is the signal for the terminal station to upload uplink service data. The number of interval symbols is the total number of interval symbols in the transmission interval between the current uplink service data and the historical uplink service data; the transmission interval and interval symbol between the current uplink service data and the historical uplink service data can be pre-configured at the management station before the industrial communication system enters the service stage.

[0107] In this embodiment, the current frequency offset estimation value can be estimated using the following formula 1. Formula 1 is:

[0108]

[0109] in, represents the current frequency offset estimate, d represents the number of interval symbols between the current uplink service data and the historical uplink service data, N represents the number of sampling points of the reference signal, N CP Indicates the cyclic prefix length of the uplink service data, N RS represents the number of subcarriers whose transmission resources overlap between the current reference signal and the historical reference signal, n represents the subcarrier whose transmission resources overlap nth, and H old represents the historical channel estimation matrix, Hnew represents the current channel estimation matrix, * represents conjugate, and angle represents the angle parameter. From formula 1, we can see that the angle range of the angle parameter is (-π, π), and the range of the frequency offset estimation value is

[0110] In one example, if the frame structure of the uplink signal in the industrial communication system is a symmetrical 4D4U, each 1ms is 1 frame, 1 frame includes 8 slots, each slot is 125us, including 9 symbols, the subcarrier spacing is 78.125KHz, N is equal to 256, Ncp=21, then it can be determined that d is equal to 72, so that in the service stage, using formula 1, the channel estimation result based on the real-time uplink service data of two adjacent transmissions can estimate the frequency deviation estimation value range: (-501Hz~501Hz).

[0111] In a feasible implementation, the a priori frequency offset estimation information includes: a historical frequency offset estimation value of real-time uplink service data.

[0112] Step S200 may include: when the current uplink service data is non-real-time uplink service data, using the historical frequency offset estimation value as the current frequency offset estimation value of the current uplink service data.

[0113] It should be noted that, for the non-real-time uplink service data of the terminal station's non-real-time service, based on the determinism of the terminal station in the industrial communication system, the historical frequency deviation estimate value when the terminal station received the real-time uplink service data at the historical moment before the current moment can be used as the current frequency deviation estimate value of the current uplink service data to compensate for the frequency deviation of the non-real-time uplink service data.

[0114] In one example, if Figure 6 As shown, after the industrial communication system enters the service phase, for the real-time uplink service data of the terminal station TS0, the current uplink service data of the Nth frame and the current uplink service data of the N+1th frame respectively correspond to the current frequency offset estimation value FO new , can be calculated by calculating the current channel estimation matrix H new , combined with the historical channel estimation matrix H Old Furthermore, the current uplink service data of the Nth frame and the current uplink service data of the N+1th frame can be obtained by using their respective corresponding current frequency offset estimation values ​​FO new Perform frequency offset compensation. In which, the current channel estimation matrix H is calculated new and the current frequency offset estimate FO new , using the current channel estimation matrix H new and the current frequency offset estimate FO new , update the historical channel estimation matrix H in the prior frequency offset estimation information Oldand the historical frequency deviation estimate FO Old In addition, for the non-real-time uplink service data of the terminal station TS0, the historical frequency offset estimation value FO corresponding to the real-time uplink service data of the terminal station TS0 is directly converted into Old , as the current frequency offset estimate of the non-real-time uplink service data, and perform frequency offset compensation on the non-real-time uplink service data. Figure 6 In the embodiment, the real-time service new transmission corresponds to the real-time uplink service data is the new transmission uplink service data, the real-time service retransmission corresponds to the real-time uplink service data is the retransmission uplink service data, and the non-real-time service corresponds to the non-real-time uplink service data.

[0115] Therefore, this embodiment provides a frequency offset estimation method, in which the management station estimates the current frequency offset estimation value of the current uplink service data by combining the current uplink service data and the prior frequency offset estimation information. Since the prior frequency offset estimation information is taken into account, only a single reference signal needs to be inserted into the current uplink service data to accurately estimate the current frequency offset estimation value of the current uplink service data. Compared with performing CFO estimation on each uplink time slot through multiple reference signals, the management station only needs to demodulate one reference signal for one terminal station, so that the management station can process more terminal nodes within the same hardware and time-frequency resources, thereby improving the resource utilization of the management station.

[0116] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be described in detail later. Figures 7 to 13 , Figure 7 This is a schematic diagram of exemplary scheduling information of a frequency offset estimation method of the present application. Figure 8 is a schematic diagram of an exemplary frequency domain resource allocation for alternate frame transmission, Fig. 9 is another exemplary schematic diagram of frequency domain resource allocation for alternate frame transmission, Fig.10 is a schematic diagram of an exemplary frequency domain resource allocation for cross-frame transmission, Fig.11 is a schematic diagram of an exemplary frequency domain resource allocation for same-frame transmission, Fig.12 is another exemplary schematic diagram of frequency domain resource allocation for cross-frame transmission. Fig.13 Schematic diagram of data retransmission method when there are at least two terminal stations.

[0117] On this basis, before step S100, the frequency offset estimation method may further include steps S300 to S400:

[0118] Step S300: acquiring periodic information of real-time services of the terminal station.

[0119] Real-time services are periodic uplink services.

[0120] Step S400: configuring resources for real-time services based on cycle information and system parameters.

[0121] It should be noted that the real-time uplink service data in the industrial communication system corresponds to the real-time service, and the non-real-time uplink service data corresponds to the non-real-time service. Before the industrial communication system enters the service stage, it is necessary to configure resources for the real-time service of each terminal station based on the periodic information of the real-time service of each terminal station at the management station, and / or, configure resources for the non-real-time service of each terminal station at the management station, obtain the scheduling information of each terminal station and send it to the corresponding terminal station, so that each terminal station can upload its own uplink service data according to the received scheduling information. Among them, the periodic information can be determined based on the communication period in the industrial communication system, the number of TS served by the MS, the reliability requirements, the physical planning of the production line, and the service model of the production line. System parameters may include parameters such as the frame structure and subcarrier spacing of the uplink signal.

[0122] In a feasible implementation, before step S300, the frequency offset estimation method further includes: configuring the frequency offset estimation mode as a priori frequency offset estimation mode based on any one or combination of communication cycle, number of terminal stations, reliability requirements, scenario information, and business mode.

[0123] It should be noted that the scheduling information may also include the frequency offset estimation mode of the frequency offset estimation device, that is, before the communication system enters the service phase, the frequency offset estimation mode of each terminal station may also be configured in the management station. The frequency offset estimation mode may include a normal mode and a priori frequency offset estimation mode. In the normal mode, the frequency offset estimation device performs frequency offset estimation based on multiple reference signals, and in the priori frequency offset estimation mode, the frequency offset estimation device performs frequency offset estimation based on the frequency offset estimation method of this embodiment. Figure 7 As shown, in the scheduling information, an unsigned 8-bit integer is used to represent the frequency offset estimation mode, the normal mode is represented by 0, and the a priori frequency offset estimation mode is represented by 1.

[0124] It is understandable that for different communication systems, the frequency deviation estimation mode to be adopted can be determined according to any one or combination of the communication cycle, the number of terminal stations, the reliability requirements, the scenario information, and the business model of the communication system. Among them, the communication cycle, the reliability requirements, the scenario information, and the business model can all be determined according to the actual industrial control scenario. The number of terminal stations is the total number of terminal stations served by the management station in the communication system. The scenario information may include the physical planning of the production line, and the business model may include the business model of the production line.

[0125] In one example, when the terminal station does not move or the crystal oscillator has high accuracy, the normal mode may be used. On the contrary, when the terminal station moves or the crystal oscillator has low accuracy, the a priori frequency offset estimation mode may be used.

[0126] In addition, it can be understood that in order to accurately send the scheduling information of each terminal station, the scheduling information may also include the identity identifier TS ID of the terminal station. Figure 7 As shown, in the scheduling information, the TS ID can be represented by an unsigned 8-bit integer.

[0127] In a feasible implementation, step S400 may include step A410:

[0128] Step A410: for at least two real-time uplink service data corresponding to the real-time service, at least partially overlapping frequency domain resources are configured based on the period information and the system parameters.

[0129] It should be noted that for the same terminal station, it is necessary to ensure that the frequency domain resources of each real-time uplink service data uploaded at different times are fully or partially overlapped. Therefore, the scheduling information may also include the frequency domain overlapping positions of at least two real-time uplink service data of each terminal station. Figure 7 As shown, when the total number of RBs (Resource Blocks) of frequency domain resources is 20, the frequency domain overlapping positions in the scheduling information are represented in a bitmap manner using an unsigned 32-bit integer.

[0130] In a feasible implementation manner, the real-time uplink service data is uploaded by way of data retransmission.

[0131] When the number of the terminal station is one, the data retransmission mode of the real-time uplink service data includes at least one of inter-frame transmission, cross-frame transmission and same-frame transmission.

[0132] When the number of terminal stations is at least two, if the real-time uplink service data is newly transmitted uplink service data, it is transmitted through even-numbered frames, and if the real-time uplink service data is retransmitted uplink service data, it is transmitted through odd-numbered frames.

[0133] It should be noted that the scheduling information may also include a transmission interval between two adjacent transmissions of real-time uplink service data, and the transmission interval may be determined according to a data retransmission method of the real-time uplink service data and a frame structure of an uplink signal. In particular, when the industrial communication system includes different numbers of terminal stations, the data retransmission method of the real-time uplink service data is different.

[0134] In this embodiment, when there is only one terminal station in the industrial communication system, the data retransmission method of the terminal station may include at least one of interframe transmission, cross-frame transmission and same-frame transmission. Preferably, the data retransmission method of the same terminal station is any one of interframe transmission, cross-frame transmission and same-frame transmission. When there are two or more terminal stations in the industrial communication system, the newly transmitted uplink service data of each terminal station is transmitted through even frames, and the retransmitted uplink service data of each terminal station is transmitted through odd frames. For the non-real-time uplink service data of the terminal station, the idle frequency domain resources of the frame corresponding to the non-real-time uplink service data are used for transmission. Figure 7 As shown, in the scheduling information, the transmission interval can be represented by an unsigned 8-bit integer.

[0135] In one example, it is assumed that the frame structure of the uplink signal of the communication system is a symmetrical 4D4U, where each 1ms is a frame, including 8 slots, each slot is 125us, and includes 9 symbols. Figure 8 As shown, when the number of terminal stations is one, when data retransmission is one retransmission, the newly transmitted uplink service data is in frame N, and the retransmitted uplink service data is in frame N+1, and the frequency domain resource positions of the two transmissions of real-time uplink service data are consistent. Fig. 9 As shown, when the number of terminal stations is one and the data is retransmitted three times, the newly transmitted uplink service data is in frame N, and the retransmitted uplink service data is in frame N+1. The frequency domain resource positions of the two transmissions of real-time uplink service data are consistent. The newly transmitted uplink service data is in frame N, and the retransmitted uplink service data is in frame N+1, frame N+2 and frame N+3. The frequency domain resource positions of the four transmissions of uplink service data are consistent. Fig.10 As shown, when the number of terminal stations is one, when data retransmission is one retransmission, the newly transmitted uplink service data is in frame N, and the retransmitted uplink service data is in frame N+2, and the frequency domain resource positions of the two transmissions of real-time uplink service data are consistent. Fig.11 As shown, when the number of terminal stations is one and the data is retransmitted once, the newly transmitted uplink service data is in U0, and the retransmitted uplink service data is in U2, and the frequency domain resource positions of the two transmissions of real-time uplink service data are consistent. Fig.12 As shown, when the number of terminal stations is one and the data is retransmitted once, the newly transmitted uplink service data is in frame N, and the retransmitted uplink service data is in frame N+1. The frequency domain resource positions of the two transmissions of real-time uplink service data are inconsistent, but partially overlap.

[0136] In another example, it is assumed that the frame structure of the uplink signal of the communication system is a symmetrical 4D4U, where each 1 ms is a frame, including 8 slots, each slot is 125 us, and includes 9 symbols. Fig.13As shown, if the MS serves 14 TS real-time services, numbered TS0 to TS13, with a service cycle of 2ms, the newly transmitted uplink service data of each terminal station is transmitted in the even-numbered frames, and the retransmitted uplink service data is transmitted in the odd-numbered frames.

[0137] In addition, it can be understood that the non-real-time uplink service data for the non-real-time services of each terminal station can be transmitted on idle frequency domain resources. Fig.13 As shown, in the 2N+1 frame, the non-real-time uplink service data of TS0 is transmitted on the idle frequency domain resources of U3.

[0138] Therefore, this embodiment provides a frequency offset estimation method. Before the communication system enters the service stage, the scheduling information of each terminal station in the communication system is configured according to the system characteristics of the communication system, so that in the subsequent service stage, the frequency offset estimation device can perform real-time frequency offset estimation based on the prior frequency offset estimation information, thereby improving the resource utilization of the management station.

[0139] The present application provides a frequency offset estimation device, such as Fig.14 As shown, the frequency offset estimation device may include:

[0140] The acquisition module 10 is used to acquire the prior frequency offset estimation information of the terminal station when receiving the current uplink service data of the terminal station;

[0141] The estimation module 20 is used to determine the current frequency offset estimation value of the current uplink service data based on the current uplink service data and in combination with the priori frequency offset estimation information.

[0142] For more implementation details in the specific implementation of the above frequency offset estimation device, please refer to the description of the specific implementation of the frequency offset estimation method in the above embodiment, and for the sake of brevity of the description, they will not be repeated here.

[0143] The present application provides a frequency offset estimation device, which includes: at least one processor; and a memory that is communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the frequency offset estimation method in the above-mentioned embodiment 1.

[0144] Reference below Fig.15 , which shows a schematic diagram of the structure of a frequency offset estimation device suitable for implementing an embodiment of the present application. The frequency offset estimation device in the embodiment of the present application may include but is not limited to mobile terminals such as laptop computers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), etc., and fixed terminals such as desktop computers, etc. Fig.15 The frequency offset estimation device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0145] like Fig.15 As shown, the frequency offset estimation device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the frequency offset estimation device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 may allow the frequency offset estimation device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a frequency offset estimation device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have alternatively.

[0146] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0147] The frequency offset estimation device provided by the present application adopts the frequency offset estimation method in the above embodiment, which can solve the technical problem of low resource utilization of the base station. Compared with the related art, the beneficial effect of the frequency offset estimation device provided by the present application is the same as the beneficial effect of the frequency offset estimation method provided by the above embodiment, and other technical features in the frequency offset estimation device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0148] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0149] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0150] The present application provides a communication system, which may include:

[0151] A management station is provided with the frequency deviation estimation device as described above.

[0152] For more implementation details in the specific implementation of the above frequency offset estimation device, please refer to the description of the specific implementation of the frequency offset estimation device in the above embodiment. For the sake of brevity of the specification, they will not be repeated here.

[0153] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the frequency offset estimation method in the above-mentioned embodiment.

[0154] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0155] The computer-readable storage medium may be included in the frequency offset estimation device; or may exist independently without being assembled into the frequency offset estimation device.

[0156] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the frequency deviation estimation device, the frequency deviation estimation device: obtains the prior frequency deviation estimation information of the terminal station when receiving the current uplink service data of the terminal station; determines the current frequency deviation estimation value of the current uplink service data based on the current uplink service data and in combination with the prior frequency deviation estimation information.

[0157] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0158] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0159] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0160] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned frequency offset estimation method, and can solve the technical problem of low resource utilization of base stations. Compared with the related art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the frequency offset estimation method provided in the above-mentioned embodiment, and will not be repeated here.

[0161] The present application also provides a computer program product, including a computer program, which implements the steps of the above-mentioned frequency offset estimation method when executed by a processor.

[0162] The computer program product provided by the present application can solve the technical problem of low resource utilization of base stations. Compared with the related art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the frequency offset estimation method provided by the above embodiment, which will not be described in detail here.

[0163] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A frequency offset estimation method, characterized in that: The frequency offset estimation method comprises: Upon receiving current uplink service data of a terminal station, obtaining a priori frequency offset estimation information of the terminal station; Based on the current uplink service data and in combination with the priori frequency offset estimation information, a current frequency offset estimation value of the current uplink service data is determined.

2. The frequency offset estimation method according to claim 1, wherein: The step of determining a current frequency offset estimation value of the current uplink service data based on the current uplink service data and in combination with the priori frequency offset estimation information comprises: In the case where the current uplink service data is real-time uplink service data, the current frequency offset estimation value of the current uplink service data is determined based on the current uplink service data and combined with the prior frequency offset estimation information, and the real-time uplink service data is uplink service data uploaded periodically.

3. The frequency offset estimation method according to claim 2, wherein: The step of determining a current frequency offset estimation value of the current uplink service data based on the current uplink service data and in combination with the priori frequency offset estimation information when the current uplink service data is real-time uplink service data comprises: In a case where the current uplink service data is real-time uplink service data, performing channel estimation based on a current reference signal corresponding to the current uplink service data to obtain a current channel estimation result; Based on the current channel estimation result and the priori frequency offset estimation information, a current frequency offset estimation value of the current uplink service data is determined.

4. The frequency offset estimation method according to claim 3, wherein: The a priori frequency offset estimation information includes: historical channel estimation results; The step of determining a current frequency offset estimation value of the current uplink service data based on the current channel estimation result and the priori frequency offset estimation information comprises: Based on the current channel estimation result and the historical channel estimation result, a current frequency offset estimation value of the current uplink service data is determined.

5. The frequency offset estimation method according to claim 4, wherein: The current channel estimation result is a current channel estimation matrix, and / or the historical channel estimation result is a historical channel estimation matrix; The step of determining the current frequency offset estimation value of the current uplink service data based on the current channel estimation result and the historical channel estimation result comprises: Calculate, based on the current channel estimation matrix and the historical channel estimation matrix, a superposition channel response matrix of subcarriers whose transmission resources overlap between the current reference signal and the historical reference signal; Based on the superimposed channel response matrix, a current frequency offset estimation value of the current uplink service data is determined.

6. The frequency offset estimation method according to claim 5, wherein: The step of determining the current frequency offset estimation value of the current uplink service data based on the superimposed channel response matrix comprises: Based on the angle parameter corresponding to the superimposed channel response matrix, the number of sampling points of the reference signal, the cyclic prefix length of the uplink service data and the number of interval symbols between the current uplink service data and the historical uplink service data, the current frequency offset estimation value of the current uplink service data is estimated.

7. The frequency offset estimation method according to claim 1, wherein: The a priori frequency offset estimation information includes: historical frequency offset estimation values ​​of real-time uplink service data; The step of determining a current frequency offset estimation value of the current uplink service data based on the current uplink service data and in combination with the priori frequency offset estimation information comprises: In a case where the current uplink service data is non-real-time uplink service data, the historical frequency offset estimation value is used as the current frequency offset estimation value of the current uplink service data.

8. The frequency offset estimation method according to any one of claims 1 to 7, characterized in that: Include at least one of the following: The frequency domain resources of the current uplink service data at least partially overlap with the frequency domain resources of the historical uplink service data corresponding to the priori frequency offset estimation information; The reference signal in the current uplink service data and / or the reference signal in the historical uplink service data corresponding to the priori frequency offset estimation information is single.

9. The frequency offset estimation method according to any one of claims 1 to 7, characterized in that: Before the step of acquiring a priori frequency offset estimation information of the current uplink service data when the current uplink service data of the terminal station is received, the frequency offset estimation method further includes: Acquiring periodic information of a real-time service of a terminal station, wherein the real-time service is a periodic uplink service; Resources are configured for the real-time service based on the period information and system parameters.

10. The frequency offset estimation method according to claim 9, wherein: The step of configuring resources for the real-time service based on the periodic information and system parameters includes: For at least two real-time uplink service data corresponding to the real-time service, at least partially overlapping frequency domain resources are configured based on the period information and system parameters.

11. The frequency offset estimation method according to claim 9, wherein: The real-time uplink service data is uploaded by means of data retransmission; In the case where the number of the terminal station is one, the data retransmission mode of the real-time uplink service data includes at least one of inter-frame transmission, cross-frame transmission and same-frame transmission; When the number of the terminal stations is at least two, if the real-time uplink service data is new uplink service data, it is transmitted through even frames; if the real-time uplink service data is retransmitted uplink service data, it is transmitted through odd frames.

12. The frequency offset estimation method according to claim 9, wherein: Before the step of acquiring the period information of the real-time service of the terminal station, the frequency offset estimation method further includes: Based on any one or a combination of communication cycle, number of terminal stations, reliability requirements, scenario information, and business mode, the frequency offset estimation mode is configured as a priori frequency offset estimation mode.

13. A frequency offset estimation device, characterized in that: The frequency offset estimation device comprises: An acquisition module, configured to acquire a priori frequency offset estimation information of a terminal station when receiving current uplink service data of the terminal station; The estimation module is used to determine the current frequency offset estimation value of the current uplink service data based on the current uplink service data and in combination with the priori frequency offset estimation information.

14. A frequency offset estimation device, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the frequency offset estimation method according to any one of claims 1 to 12.

15. A communication system, characterized in that: The communication system comprises: A management station, wherein the management station is provided with the frequency offset estimation device according to claim 14.

16. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the frequency offset estimation method according to any one of claims 1 to 12 are implemented.

17. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the frequency offset estimation method according to any one of claims 1 to 12 are implemented.

Images