IRT determination method and device, access network equipment and medium

Abstract

The invention discloses an IRT determination method and device, access network equipment and a medium, and relates to the field of wireless communication. The specific implementation scheme is as follows: an access network device determines SNRs of a plurality of first antenna arrays according to SRSs received by the plurality of first antenna arrays to which a target terminal belongs, and determines a target antenna array with the maximum SNR from the plurality of first antenna arrays; for any subcarrier in a plurality of subcarriers in the bandwidth occupied by the SRS, acquiring a first power value estimated by an SRS channel of any subcarrier on a receiving antenna corresponding to each antenna port of the target antenna array; and determining the IRT of the target terminal according to the first power values of the plurality of subcarriers. Therefore, the IRT of the terminal can be calculated based on the target antenna array with the strongest SNR in the multiple antenna arrays to which the terminal belongs, generation of negative gain can be prevented, and uplink and downlink demodulation performance can be enhanced.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a method, device, access network equipment and medium for determining an IRT. Background Art

[0002] In the cell merging scenario in the 5G communication system, the access network equipment can be equipped with multiple antenna arrays, and the terminal may select multiple antenna arrays. In the related technology, when the access network equipment calculates the IRT (Impulse Response Timing, uplink timing synchronization, or impulse response timing) of the terminal based on the SRS (Sounding Reference Signal, measurement reference signal) sent by the terminal, it calculates the IRT of the terminal based on all antenna arrays selected or owned by the terminal.

[0003] However, when calculating the IRT based on all antenna arrays to which the terminal belongs, there may be a negative gain, resulting in low accuracy of the IRT calculation result, thereby causing poor uplink and downlink demodulation performance. Summary of the invention

[0004] The present application provides a method, apparatus, access network equipment and medium for determining IRT.

[0005] According to one aspect of the present application, a method for determining an IRT is provided, which is executed by an access network device, and includes: determining a signal-to-noise ratio (SNR) of multiple first antenna arrays based on a measurement reference signal (SRS) sent by a target terminal and received by multiple first antenna arrays; wherein the first antenna array is an antenna array to which the target terminal belongs; determining a target antenna array with a maximum SNR from the multiple first antenna arrays; for any subcarrier among multiple subcarriers within the SRS occupied bandwidth, obtaining a first power value of an SRS channel estimation of any subcarrier on a receiving antenna corresponding to each antenna port of the target antenna array; and determining the IRT of the target terminal based on the first power values ​​of the multiple subcarriers.

[0006] As a possible implementation method, for any subcarrier among multiple subcarriers within the SRS occupied bandwidth, obtain the first power value of the SRS channel estimation of any subcarrier on the receiving antenna corresponding to each antenna port of the target antenna array, including: for any subcarrier, obtain the time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port of the target antenna array; wherein the OFDM symbol is the symbol occupied by the SRS, and j and k are both positive integers; obtain the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; wherein the first target factor is used to indicate the inverse discrete Fourier transform IDFT shift factor and automatic gain control AGC scaling factor obtained by frequency domain processing; according to the time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port and the first target factor, determine the first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port.

[0007] As a possible implementation method, a first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port is determined based on a time domain channel estimation result and a first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port, including: performing AGC adjustment on the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port to obtain a second target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; and determining the first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port based on a time domain channel estimation result and a second target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port.

[0008] As a possible implementation method, determining the IRT of the target terminal according to the first power values ​​of multiple subcarriers includes: determining the timing deviation of the target terminal according to the first power values ​​of multiple subcarriers; and determining the IRT of the target terminal according to the timing deviation.

[0009] As a possible implementation method, the timing deviation of the target terminal is determined based on the first power values ​​of multiple subcarriers, including: for any subcarrier within the SRS occupied bandwidth, according to multiple first power values ​​of any subcarrier, determining the target power value of any subcarrier; determining the target subcarrier with the largest target power value from multiple subcarriers; and determining the timing deviation of the target terminal based on the first position index of the target subcarrier.

[0010] As a possible implementation method, for any subcarrier within the SRS occupied bandwidth, a target power value of any subcarrier is determined based on multiple first power values ​​of any subcarrier, including: obtaining a first number of antenna ports included in the target antenna array and a second number of receiving antennas included in the target antenna array; determining a target value m based on the product of the first number and the second number; for any subcarrier within the SRS occupied bandwidth, respectively shifting the multiple first power values ​​of any subcarrier right by m places to obtain multiple second power values ​​of any subcarrier; and taking the sum of the multiple second power values ​​of any subcarrier as the target power value of any subcarrier.

[0011] As a possible implementation method, the timing deviation of the target terminal is determined according to the first position index of the target subcarrier, including: shifting the first position index left by a first set number of bits to obtain a second position index; determining the length of the time domain channel estimation result of the target subcarrier on the OFDM symbol received by the receiving antenna corresponding to any antenna port according to the third number of resource blocks RB occupied by the target terminal and the frequency domain offset of the SRS; and determining the timing deviation of the target terminal according to the second position index and the length.

[0012] As a possible implementation method, the timing deviation of the target terminal is determined according to the second position index and the length, including: determining a reference value according to the product of the length and a first set coefficient, and judging whether the second position index is less than the reference value; when the second position index is less than the reference value, using the second position index as the timing deviation; when the second position index is greater than or equal to the reference value, determining a first intermediate coefficient according to the product of the reference value and the second set coefficient; wherein the second set coefficient is less than the first set coefficient; and determining the timing deviation according to the difference between the second position index and the first intermediate coefficient.

[0013] As a possible implementation method, the IRT of the target terminal is determined according to the timing deviation, including: determining the fast Fourier transform FFT length according to the subcarrier spacing SCS between multiple subcarriers; using the product of the FFT length and the timing deviation as the second intermediate coefficient; determining the IRT of the target terminal according to the ratio of the second intermediate coefficient and the third number of RBs occupied by the target terminal.

[0014] As a possible implementation method, the IRT of the target terminal is determined based on the ratio of the second intermediate coefficient and the third number of RBs occupied by the target terminal, including: determining the third intermediate coefficient based on the ratio of the second intermediate coefficient and the third number; right-shifting the third intermediate coefficient by a second set number of bits to obtain a fourth intermediate coefficient; and determining the IRT based on the fourth intermediate coefficient and the time domain compensation target value configured by the OM module in the access network device.

[0015] According to another aspect of the present application, an access network device is provided, including:

[0016] Memory, transceiver, processor:

[0017] A memory for storing computer programs; a transceiver for transmitting and receiving data under the control of a processor; a processor for reading the computer program in the memory and performing the following operations: determining the signal-to-noise ratios (SNRs) of the multiple first antenna arrays according to the measurement reference signals (SRSs) sent by the target terminal and received by the multiple first antenna arrays; wherein the first antenna array is the antenna array to which the target terminal belongs; determining the target antenna array with the largest SNR from the multiple first antenna arrays; obtaining, for any subcarrier among the multiple subcarriers within the SRS occupied bandwidth, a first power value of the SRS channel estimation of any subcarrier on the receiving antenna corresponding to each antenna port of the target antenna array; and determining the IRT of the target terminal according to the first power values ​​of the multiple subcarriers.

[0018] As a possible implementation method, the processor executes, for any subcarrier among multiple subcarriers within the SRS occupied bandwidth, to obtain the first power value of the SRS channel estimation of any subcarrier on the receiving antenna corresponding to each antenna port of the target antenna array, specifically: for any subcarrier, obtain the time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port of the target antenna array; wherein the OFDM symbol is the symbol occupied by the SRS, and j and k are both positive integers; obtain the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; wherein the first target factor is used to indicate the inverse discrete Fourier transform IDFT shift factor and automatic gain control AGC scaling factor obtained by frequency domain processing; according to the time domain channel estimation result and the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port, determine the first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port.

[0019] As a possible implementation method, the processor determines the first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port based on the time domain channel estimation result and the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port, specifically: AGC adjustment is performed on the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port to obtain the second target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; based on the time domain channel estimation result and the second target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port, the first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port is determined.

[0020] As a possible implementation method, the processor determines the IRT of the target terminal based on the first power values ​​of multiple subcarriers, specifically: determines the timing deviation of the target terminal based on the first power values ​​of multiple subcarriers; determines the IRT of the target terminal based on the timing deviation.

[0021] As a possible implementation method, the processor executes to determine the timing deviation of the target terminal based on the first power values ​​of multiple subcarriers, specifically: for any subcarrier within the SRS occupied bandwidth, according to multiple first power values ​​of any subcarrier, determine the target power value of any subcarrier; determine the target subcarrier with the largest target power value from multiple subcarriers; determine the timing deviation of the target terminal according to the first position index of the target subcarrier.

[0022] As a possible implementation method, the processor determines the target power value of any subcarrier within the SRS occupied bandwidth according to multiple first power values ​​of any subcarrier, specifically: obtaining a first number of antenna ports included in the target antenna array and a second number of receiving antennas included in the target antenna array; determining a target value m according to the product of the first number and the second number; for any subcarrier within the SRS occupied bandwidth, respectively shifting the multiple first power values ​​of any subcarrier right by m places to obtain multiple second power values ​​of any subcarrier; and taking the sum of the multiple second power values ​​of any subcarrier as the target power value of any subcarrier.

[0023] As a possible implementation method, the processor executes to determine the timing deviation of the target terminal based on the first position index of the target subcarrier, specifically: shift the first position index left by a first set number of bits to obtain a second position index; determine the length of the time domain channel estimation result of the target subcarrier on the OFDM symbol received by the receiving antenna corresponding to any antenna port based on the third number of resource blocks RB occupied by the target terminal and the frequency domain offset of the SRS; determine the timing deviation of the target terminal based on the second position index and the length.

[0024] As a possible implementation method, the processor determines the timing deviation of the target terminal based on the second position index and the length, specifically: determines a reference value based on the product of the length and the first set coefficient, and determines whether the second position index is less than the reference value; when the second position index is less than the reference value, uses the second position index as the timing deviation; when the second position index is greater than or equal to the reference value, determines the first intermediate coefficient based on the product of the reference value and the second set coefficient; wherein the second set coefficient is less than the first set coefficient; determines the timing deviation based on the difference between the second position index and the first intermediate coefficient.

[0025] As a possible implementation method, the processor determines the IRT of the target terminal based on the timing deviation, specifically: determining the fast Fourier transform FFT length based on the subcarrier spacing SCS between multiple subcarriers; taking the product of the FFT length and the timing deviation as the second intermediate coefficient; determining the IRT of the target terminal based on the ratio of the second intermediate coefficient and the third number of RBs occupied by the target terminal.

[0026] As a possible implementation method, the processor determines the IRT of the target terminal based on the ratio of the second intermediate coefficient and the third number of RBs occupied by the target terminal, specifically: determining the third intermediate coefficient based on the ratio of the second intermediate coefficient and the third number; right shifting the third intermediate coefficient by a second set number of bits to obtain a fourth intermediate coefficient; determining the IRT based on the fourth intermediate coefficient and the time domain compensation target value configured by the OM module in the access network device.

[0027] According to another aspect of the present application, there is provided an IRT determination device, which is applied to an access network device, and includes: a first determination unit, which is used to determine the signal-to-noise ratio SNR of multiple first antenna arrays based on a measurement reference signal SRS sent by a target terminal and received by multiple first antenna arrays; wherein the first antenna array is the antenna array to which the target terminal belongs; a second determination unit, which is used to determine the target antenna array with the largest SNR from the multiple first antenna arrays; an acquisition unit, which is used to acquire, for any subcarrier among multiple subcarriers within the SRS occupied bandwidth, a first power value of the SRS channel estimation of any subcarrier on the receiving antenna corresponding to each antenna port of the target antenna array; and a third determination unit, which is used to determine the IRT of the target terminal based on the first power values ​​of the multiple subcarriers.

[0028] As a possible implementation method, the acquisition unit is specifically used to: for any subcarrier, obtain the time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port of the target antenna array; wherein the OFDM symbol is the symbol occupied by the SRS, and j and k are both positive integers; obtain the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; wherein the first target factor is used to indicate the inverse discrete Fourier transform IDFT shift factor and automatic gain control AGC scaling factor obtained by frequency domain processing; determine the first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port based on the time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port and the first target factor.

[0029] As a possible implementation method, the acquisition unit is specifically used to: perform AGC adjustment on the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port to obtain the second target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; determine the first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port based on the time domain channel estimation result and the second target factor on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port.

[0030] As a possible implementation manner, the third determination unit is specifically configured to: determine a timing deviation of the target terminal according to first power values ​​of multiple subcarriers; and determine an IRT of the target terminal according to the timing deviation.

[0031] As a possible implementation method, the third determination unit is specifically used to: determine the target power value of any subcarrier within the SRS occupied bandwidth based on multiple first power values ​​of any subcarrier; determine the target subcarrier with the largest target power value from multiple subcarriers; and determine the timing deviation of the target terminal based on the first position index of the target subcarrier.

[0032] As a possible implementation method, the third determination unit is specifically used to: obtain a first number of antenna ports included in the target antenna array, and a second number of receiving antennas included in the target antenna array; determine a target value m based on the product of the first number and the second number; for any subcarrier within the SRS occupied bandwidth, respectively shift multiple first power values ​​of any subcarrier right by m places to obtain multiple second power values ​​of any subcarrier; and use the sum of the multiple second power values ​​of any subcarrier as the target power value of any subcarrier.

[0033] As a possible implementation method, the third determination unit is specifically used to: shift the first position index left by a first set number of bits to obtain a second position index; determine the length of the time domain channel estimation result of the target subcarrier on the OFDM symbol received by the receiving antenna corresponding to any antenna port based on the third number of resource blocks RB occupied by the target terminal and the frequency domain offset of the SRS; determine the timing deviation of the target terminal based on the second position index and the length.

[0034] As a possible implementation method, the third determination unit is specifically used to: determine a reference value based on the product of the length and the first set coefficient, and judge whether the second position index is less than the reference value; when the second position index is less than the reference value, use the second position index as the timing deviation; when the second position index is greater than or equal to the reference value, determine the first intermediate coefficient based on the product of the reference value and the second set coefficient; wherein the second set coefficient is less than the first set coefficient; and determine the timing deviation based on the difference between the second position index and the first intermediate coefficient.

[0035] As a possible implementation method, the third determination unit is specifically used to: determine the fast Fourier transform FFT length based on the subcarrier spacing SCS between multiple subcarriers; use the product of the FFT length and the timing deviation as the second intermediate coefficient; determine the IRT of the target terminal based on the ratio of the second intermediate coefficient and the third number of RBs occupied by the target terminal.

[0036] As a possible implementation method, the third determination unit is specifically used to: determine the third intermediate coefficient based on the ratio of the second intermediate coefficient and the third number; shift the third intermediate coefficient right by a second set number of bits to obtain a fourth intermediate coefficient; determine the IRT based on the fourth intermediate coefficient and the time domain compensation target value configured by the OM module in the access network device.

[0037] According to another aspect of the present application, a processor-readable storage medium is provided, characterized in that the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the IRT determination method described in the above embodiment.

[0038] According to another aspect of the present application, a computer program product is provided, including a computer program, which, when executed by a processor, implements the method for determining the IRT described in the above embodiment of the present application.

[0039] The IRT determination method, apparatus, access network equipment, and medium provided in the embodiments of the present application can calculate the IRT of the terminal based on the target antenna array with the strongest SNR among multiple antenna arrays to which the terminal belongs, thereby preventing the generation of negative gain and enhancing uplink and downlink demodulation performance.

[0040] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings are used to better understand the present solution and do not constitute a limitation of the present application.

[0042] Figure 1A flowchart of a method for determining an IRT provided in an embodiment of the present application;

[0043] Figure 2 A flowchart of another method for determining an IRT provided in an embodiment of the present application;

[0044] Figure 3 A flowchart of another method for determining an IRT provided in an embodiment of the present application;

[0045] Figure 4 A flowchart of another method for determining an IRT provided in an embodiment of the present application;

[0046] Figure 5 A flowchart of another method for determining an IRT provided in an embodiment of the present application;

[0047] Figure 6 A schematic diagram of the structure of an access network device provided in an embodiment of the present application;

[0048] Figure 7 A schematic diagram of the structure of an IRT determination device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] In the embodiments of the present application, the term "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0050] In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0051] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] In the cell merging scenario in the 5G communication system, the access network equipment can be equipped with multiple antenna arrays. At this time, the terminal may select multiple antenna arrays. Currently, when the access network equipment calculates the IRT of the terminal based on the SRS sent by the terminal, it calculates the IRT of the terminal based on all antenna arrays selected or belonged to by the terminal.

[0053] However, in actual field tests, it was found that the method of calculating the IRT of the terminal according to all antenna arrays to which the terminal belongs may result in negative gain, resulting in a low uplink MCS (Modulation Coding Scheme) and poor uplink demodulation performance, which has a great impact on field performance indicators.

[0054] For example, when deploying antenna arrays in the field, the antenna arrays are too far apart and some antenna arrays have strong transmission power, causing the terminal to select multiple antenna arrays. If the IRT is calculated based on all the antenna arrays selected by the terminal, the IRT calculation will be inaccurate, which will lead to a decrease in the uplink and downlink demodulation performance.

[0055] Therefore, in order to solve at least one of the above-mentioned problems, an embodiment of the present application provides a method, device, access network equipment and medium for determining IRT, wherein the method and device are based on the same application concept. Since the principles of solving the problems by the method and device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0056] The following is a method, apparatus, access network device and medium for determining IRT provided by the present application with reference to the accompanying drawings. Before describing the embodiments of the present application in detail, for ease of understanding, common technical terms are first introduced:

[0057] IRT calculation or measurement refers to measuring the uplink timing deviation of the terminal during the uplink timing tracking phase (the unit is Ts, where Ts=1 / (15000*2048) seconds).

[0058] It should be noted that the uplink transmission (or uplink data transmission) of the terminal must always maintain timing synchronization, because the deviation of timing synchronization will not only cause the channel detection error of the terminal, but also bring interference between multiple terminals, affecting the signal detection performance of other terminals. Therefore, the access network equipment must periodically track and correct the uplink timing of the terminal to prevent the timing deviation caused by the change of the terminal's moving distance or accidental link interruption.

[0059] The parameters related to IRT may be as shown in Table 1, and the input and output ports related to IRT may be as shown in Table 2.

[0060] Table 1 Important parameters of IRT estimation

[0061]

[0062]

[0063] Among them, μ is related to the value of SCS (Subcarrier Spacing).

[0064] Among them, RB is the abbreviation of Resource Block; FFT is the abbreviation of Fast Fourier Transform; OFDM is the abbreviation of Orthogonal Frequency Division Multiplexing; ZC is the abbreviation of Zadoff-Chu.

[0065] Table 2 Input and output ports of IRT estimation

[0066]

[0067]

[0068] Among them, IDFT is the abbreviation of Inverse Discrete Fourier Transform; AGC is the abbreviation of Automatic gain control; MAC is the abbreviation of Media Access Control; OM is the abbreviation of Operation Maintain; PUSCH is the abbreviation of Physical Uplink Share Channel; RRU is the abbreviation of Remote Radio Unit; SNR is the abbreviation of Signal-Noise Ratio.

[0069] Figure 1 A flowchart of a method for determining an IRT provided in an embodiment of the present application.

[0070] The method for determining the IRT in the embodiment of the present application may be executed by an access network device.

[0071] The access network equipment may be, for example, a base station, which may include multiple cells providing services for the terminal equipment. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in the access network that communicates with the wireless terminal equipment through one or more sectors on the air interface, or may be called by other names. The base station may be used to interchange received air frames with Internet Protocol (IP) packets, and may serve as a router between the wireless terminal equipment and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The base station may also coordinate the attribute management of the air interface. For example, the base station involved in the embodiments of the present application may be a base station (Base Transceiver Station, BTS) in the Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), or a base station (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary Node B (eNB or e-NodeB) in the long term evolution (LTE) system, or a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (HeNB), a relay node, a home base station (femto), a pico base station, etc., which is not limited in the embodiments of the present application. In some network structures, the base station may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be arranged geographically separately.

[0072] The terminal device may be a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. In different systems, the names of the terminal devices may also be different. For example, in a 5G system, the terminal device may be called a user equipment (UE). The wireless terminal device may communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device may be a mobile terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal device. For example, it may be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with a wireless access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDA) and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal device, an access terminal device, a user terminal device, a user agent, and a user device, but is not limited in the embodiments of the present application.

[0073] like Figure 1 As shown, the method for determining the IRT may include the following steps:

[0074] Step S101: Determine SNRs of multiple first antenna arrays according to SRSs sent by a target terminal and received by multiple first antenna arrays.

[0075] Among them, the first antenna array is the antenna array to which the target terminal belongs.

[0076] The target terminal may be any terminal device within a service cell of the access network device.

[0077] In an embodiment of the present application, the access network device may receive the SRS sent by the target terminal through multiple first antenna arrays selected or belonged to by the target terminal, and determine the SNR of each first antenna array based on the SRS received by each first antenna array.

[0078] Step S102: determining a target antenna array with the largest SNR from the multiple first antenna arrays.

[0079] In an embodiment of the present application, the access network device may determine an antenna array with the largest SNR from multiple first antenna arrays and use it as the target antenna array.

[0080] Step S103: for any subcarrier among the multiple subcarriers within the SRS occupied bandwidth, obtain a first power value of the SRS channel estimation of any subcarrier on a receiving antenna corresponding to each antenna port of the target antenna array.

[0081] In an embodiment of the present application, the access network device may respectively calculate the power value of the SRS channel estimation on each receiving antenna corresponding to each antenna port of the target antenna array for multiple subcarriers within the SRS occupied bandwidth (referred to as the first power value in the present application). That is, the access network device may calculate the first power value of the SRS channel estimation on each receiving antenna corresponding to each antenna port of the target antenna array for any one of the multiple subcarriers within the SRS occupied bandwidth.

[0082] Step S104: determining an IRT of the target terminal according to first power values ​​of the plurality of subcarriers.

[0083] In an embodiment of the present application, the access network device may calculate the IRT of the target terminal based on the first power values ​​of multiple subcarriers.

[0084] The method for determining the IRT of the embodiment of the present application determines the SNR of multiple first antenna arrays according to the SRS received by multiple first antenna arrays to which the target terminal belongs through the access network device, and determines the target antenna array with the largest SNR from the multiple first antenna arrays; for any subcarrier among the multiple subcarriers within the SRS occupied bandwidth, obtains the first power value of the SRS channel estimation of any subcarrier on the receiving antenna corresponding to each antenna port of the target antenna array; and determines the IRT of the target terminal according to the first power values ​​of the multiple subcarriers. In this way, the IRT of the terminal can be calculated based on the target antenna array with the strongest SNR among the multiple antenna arrays to which the terminal belongs, which can prevent the generation of negative gain and enhance the uplink and downlink demodulation performance.

[0085] In order to clearly illustrate how the access network device in any embodiment of the present application calculates the first power value of the SRS channel estimation of each subcarrier on the receiving antenna corresponding to each antenna port of the target antenna array, the present application also proposes a method for determining IRT.

[0086] Figure 2 A flowchart of another method for determining IRT provided in an embodiment of the present application.

[0087] like Figure 2 As shown, the IRT determination method may be performed by an access network device and may include the following steps:

[0088] Step S201: Determine SNRs of the multiple first antenna arrays according to the SRSs sent by the target terminal and received by the multiple first antenna arrays.

[0089] Among them, the first antenna array is the antenna array to which the target terminal belongs.

[0090] Step S202: determining a target antenna array with the largest SNR from multiple first antenna arrays.

[0091] The explanation of steps S201 to S202 can be found in the relevant description in any embodiment of the present application and will not be repeated here.

[0092] Step S203: For any subcarrier among the multiple subcarriers within the SRS occupied bandwidth, obtain a time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port.

[0093] Among them, OFDM symbols are symbols occupied by SRS, and j and k are both positive integers.

[0094] In an embodiment of the present application, for any subcarrier among multiple subcarriers within the SRS occupied bandwidth, a time domain channel estimation result of the subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port of the target antenna array can be calculated.

[0095] The number of OFDM symbols occupied by the SRS may be at least one, and the time domain channel estimation result on each OFDM symbol may be calculated.

[0096] As an example, assume that the target terminal is the kth UE UE, then the subcarrier is received by the kth receiving antenna corresponding to the jth antenna port. sym The time domain channel estimation result on OFDM symbols is: Mark j as p and k as k aR , then the subcarrier is received by the kth receiving antenna corresponding to the jth antenna port sym The time domain channel estimation result on OFDM symbols is:

[0097] Step S204: Obtain a first target factor of any subcarrier on an OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port.

[0098] Among them, the first target factor is used to indicate the IDFT shift factor obtained by frequency domain processing (that is, the shift factor output by the IDFT algorithm) and the AGC scaling factor (or called data scaling factor, for example, when performing RB-level output compression, compressing or converting 16 to 4 means shifting right by 2 bits. At this time, the AGC scaling factor is 2).

[0099] In the embodiment of the present application, the first target factor of the above subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port can be obtained. For example, the first target factor can be marked as Among them, j is marked as p and k is marked as k aR , then the subcarrier is received by the kth receiving antenna corresponding to the jth antenna port sym The first target factor on OFDM symbols can be:

[0100] Step S205, determining a first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port according to a time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port and a first target factor.

[0101] In an embodiment of the present application, the first power value of the subcarrier on the kth receiving antenna corresponding to the jth antenna port can be calculated based on the time domain channel estimation result of the above-mentioned subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port and the first target factor.

[0102] The number of first power values ​​of the subcarrier on the kth receiving antenna corresponding to the jth antenna port is the same as the number of OFDM symbols, that is, the subcarrier has a first power value on each OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port.

[0103] In any embodiment of the present application, in order to further improve the accuracy of the IRT calculation result, the first power value of the SRS channel estimation after removing the influence of AGC may be calculated.

[0104] For example, the first power value may be calculated as follows:

[0105] 1. AGC adjustment may be performed on the first target factor of the subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port to obtain a second target factor of the subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port.

[0106] As an example, the subcarrier is marked as the kth receiving antenna corresponding to the jth antenna port. sym The second target factor on OFDM symbols is In which, let j be p and k be k aR , then the second objective factor It can be written as For example, the following formula can be used to calculate

[0107]

[0108] in, refers to the kth sym The maximum AGC scaling factor within an OFDM symbol. For example, within an OFDM symbol, 16 is converted to 4 (i.e., shifted right by two bits, the AGC scaling factor is 2), and 8 is converted to 4 (i.e., shifted right by one bit, the AGC scaling factor is 1). At this time, It can be 2.

[0109] 2. Determine a first power value of the subcarrier on the kth receiving antenna corresponding to the jth antenna port according to a time domain channel estimation result of the subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port and a second target factor.

[0110] Still taking the above example as an example, the subcarrier is marked as the kth receiving antenna corresponding to the jth antenna port. sym The first power value on the OFDM symbol is In which, let j be p and k be k aR , then the first power value It can be written as For example, the following formula can be used to calculate

[0111]

[0112] In summary, the first power value of each OFDM symbol received by the subcarrier on the kth receiving antenna corresponding to the jth antenna port can be used as the first power value of the subcarrier on the kth receiving antenna corresponding to the jth antenna port, thereby improving the effectiveness of the first power value calculation and thus improving the effectiveness of subsequent IRT calculations.

[0113] Step S206: Determine the IRT of the target terminal according to the first power values ​​of the multiple subcarriers.

[0114] For the explanation of step S206, please refer to the relevant description in any embodiment of the present application, which will not be repeated here.

[0115] The IRT determination method of the embodiment of the present application can effectively calculate the first power value of the subcarrier on the kth receiving antenna corresponding to the jth antenna port based on the time domain channel estimation result of each OFDM symbol received by the subcarrier on the kth receiving antenna corresponding to the jth antenna port and the first target factor, thereby improving the effectiveness of the first power value calculation, and thus improving the effectiveness of subsequent IRT calculations.

[0116] In order to clearly explain how the access network device in any embodiment of the present application determines the IRT of the target terminal based on the first power values ​​of multiple subcarriers, the present application also proposes a method for determining the IRT.

[0117] Figure 3 A flowchart of another method for determining IRT provided in an embodiment of the present application.

[0118] like Figure 3 As shown, the IRT determination method may be performed by an access network device and may include the following steps:

[0119] Step S301: Determine SNRs of the plurality of first antenna arrays according to SRSs sent by the target terminal and received by the plurality of first antenna arrays.

[0120] Among them, the first antenna array is the antenna array to which the target terminal belongs.

[0121] Step S302: determining a target antenna array with the largest SNR from multiple first antenna arrays.

[0122] Step S303: For any subcarrier among the multiple subcarriers within the SRS occupied bandwidth, obtain a first power value of the SRS channel estimation of any subcarrier on a receiving antenna corresponding to each antenna port of the target antenna array.

[0123] The explanation of steps S301 to S303 can be found in the relevant description in any embodiment of the present application and will not be repeated here.

[0124] Step S304: determining a timing deviation of the target terminal according to first power values ​​of the plurality of subcarriers.

[0125] In an embodiment of the present application, the access network device may calculate the timing deviation of the target terminal according to the first power values ​​of the multiple subcarriers. For example, the target subcarrier may be determined from the multiple subcarriers according to the first power values ​​of the multiple subcarriers, and the timing deviation of the target terminal may be calculated according to the position index of the target subcarrier.

[0126] Step S305: determining the IRT of the target terminal according to the timing deviation.

[0127] In the embodiment of the present application, the IRT of the target terminal can be calculated according to the timing deviation of the target terminal. There is a positive correlation between the IRT and the timing deviation, that is, the larger the timing deviation, the larger the IRT, and vice versa, the smaller the timing deviation, the smaller the IRT.

[0128] The method for determining the IRT in the embodiment of the present application can effectively calculate the IRT of the target terminal according to the first power values ​​of multiple subcarriers.

[0129] In order to clearly explain how the access network device in the above embodiment determines the timing deviation of the target terminal according to the first power values ​​of multiple subcarriers, the present application also proposes a method for determining IRT.

[0130] Figure 4 A flowchart of another method for determining IRT provided in an embodiment of the present application.

[0131] like Figure 4 As shown, the IRT determination method may be performed by an access network device and may include the following steps:

[0132] Step S401: Determine SNRs of the multiple first antenna arrays according to the SRSs sent by the target terminal and received by the multiple first antenna arrays.

[0133] Among them, the first antenna array is the antenna array to which the target terminal belongs.

[0134] Step S402: determining a target antenna array with the largest SNR from a plurality of first antenna arrays.

[0135] Step S403: For any subcarrier among the multiple subcarriers within the SRS occupied bandwidth, obtain a first power value of the SRS channel estimation of any subcarrier on a receiving antenna corresponding to each antenna port of the target antenna array.

[0136] The explanation of steps S401 to S403 can be found in the relevant description in any embodiment of the present application and will not be repeated here.

[0137] Step S404: determining a target power value of any subcarrier according to the multiple first power values ​​of any subcarrier.

[0138] In an embodiment of the present application, for any subcarrier among the multiple subcarriers within the SRS occupied bandwidth, the target power value of the subcarrier can be calculated based on the multiple first power values ​​of the subcarrier. For example, the multiple first power values ​​of the subcarrier can be averaged to obtain the target power value of the subcarrier.

[0139] In any embodiment of the present application, the target power value of the subcarrier may be calculated, for example, as follows:

[0140] 1. Obtain the number of antenna ports included in the target antenna array (referred to as the first number in this application), and obtain the number of receiving antennas included in the target antenna array (referred to as the second number in this application).

[0141] For example, the first quantity can be recorded as K ap , the second quantity can be written as in, The value of can be equal to the number of actually deployed receiving antennas in the target antenna array.

[0142] 2. Determine the target value m based on the product of the first quantity and the second quantity.

[0143] As an example, the target value m may be: For example, assuming K ap is 2, is 4, then m=3.

[0144] 3. Shift the multiple first power values ​​of the subcarrier right by m bits respectively (ie, divide the multiple first power values ​​of the subcarrier by 2 respectively). m ) to obtain multiple second power values ​​of the subcarrier.

[0145] Taking the example in step 205 as an example, the subcarrier is received by the kth receiving antenna corresponding to the jth antenna port. sym The first power value on the OFDM symbol is Then Shift right by m bits, and the second power value can be obtained as

[0146] 4. The sum of the multiple second power values ​​of the subcarrier is used as the target power value of the subcarrier.

[0147] For example, the target power value is The following formula can be used to calculate

[0148] Step S405: determining a target subcarrier having a maximum target power value from among the multiple subcarriers.

[0149] In the embodiment of the present application, a subcarrier with the largest target power value among multiple subcarriers may be used as a target subcarrier.

[0150] Step S406: Determine the timing offset of the target terminal according to the first position index of the target subcarrier.

[0151] In an embodiment of the present application, the timing deviation of the target terminal may be calculated according to a position index of a target subcarrier (referred to as a first position index in the present application).

[0152] In any embodiment of the present application, the timing deviation of the target terminal is calculated, for example, as follows:

[0153] 1. Shift the first position index left by the first set number of bits to obtain the second position index.

[0154] The first set number of digits is a preset fixed number of digits, for example, the first set number of digits may be 2 digits.

[0155] In the embodiment of the present application, the first position index of the target subcarrier may be shifted left by a first set number of bits to obtain a second position index.

[0156] For example, taking the first set bit number as 2 bits, the first position index is marked as Then the second position index can be in,

[0157] 2. Determine the length of the time domain channel estimation result of the target subcarrier on the OFDM symbol received by the receiving antenna corresponding to any antenna port according to the third number of RBs occupied by the target terminal and the frequency domain offset of the SRS.

[0158] The frequency domain offset of SRS can be k in Table 2. TC .

[0159] The third number of RBs occupied by the target terminal is related to the bandwidth occupied by the SRS. For example, the third number of RBs occupied by the target terminal is marked as When the protocol stipulates that the bandwidth occupied by SRS is 272PRB (Physical Resource Block), is 144; when the protocol stipulates that the bandwidth occupied by SRS is 68PRB bandwidth, is 36.

[0160] In the embodiment of the present application, according to k TC and Determine the length of the time domain channel estimation result of the target subcarrier on the OFDM symbol received by the receiving antenna corresponding to any antenna port.

[0161] For example, the length of the time domain channel estimation result is marked as N SRS_che , N SRS_che It can be calculated using the following formula:

[0162] When k TC =2,

[0163] When k TC =4,

[0164] 3. Determine the timing deviation of the target terminal based on the second position index and the above length.

[0165] In an embodiment of the present application, the timing deviation of the target terminal can be calculated based on the second position index and the length of the time domain channel estimation result.

[0166] In any embodiment of the present application, the timing deviation of the target terminal may be calculated, for example, as follows:

[0167] A. Determine the reference value based on the product of the above length and the first set coefficient.

[0168] Among them, the first setting coefficient is a preset value.

[0169] As an example, the product of the length and the first set coefficient can be used as a reference value.

[0170] As another example, the number Scale of signal windows used in SRS channel estimation may be determined, and the product of the length, the first set coefficient and Scale may be used as a reference value.

[0171] For example, taking the first setting coefficient as For example, the reference value can be

[0172] B. Determine whether the second position index is less than the reference value. If so, execute the subsequent step C; if not, execute the subsequent step D.

[0173] It should be noted that step C and step D are two parallel implementation methods. In actual application, only one needs to be executed.

[0174] C. When the second position index is smaller than the reference value, the second position index may be used as the timing deviation.

[0175] D. When the second position index is greater than or equal to the reference value, the product of the reference value and the second set coefficient can be used as the first intermediate coefficient.

[0176] The second setting coefficient is also a preset value, and the second setting coefficient is smaller than the first setting coefficient. For example, the first setting coefficient can be The second setting coefficient can be

[0177] E. Use the difference between the second position index and the first intermediate coefficient as the timing deviation of the target terminal.

[0178] As an example, the first set number of bits is 2 bits, and the first set coefficient is The second setting coefficient is For example, the timing deviation of the target terminal For example, it could be:

[0179]

[0180] Step S407: determining the IRT of the target terminal according to the timing deviation.

[0181] For the explanation of step S407, please refer to the relevant description in any embodiment of the present application, which will not be repeated here.

[0182] The IRT determination method of the embodiment of the present application can effectively calculate the timing deviation of the target terminal according to the position index of the target subcarrier with the largest power among multiple subcarriers, thereby improving the effectiveness of subsequent IRT calculations.

[0183] In order to clearly explain how the access network device in the above embodiment calculates the IRT of the target terminal according to the timing deviation of the target terminal, the present application also proposes a method for determining the IRT.

[0184] Figure 5 A flowchart of another method for determining IRT provided in an embodiment of the present application.

[0185] like Figure 5 As shown, the IRT determination method may be performed by an access network device and may include the following steps:

[0186] Step S501: Determine SNRs of the plurality of first antenna arrays according to SRSs sent by the target terminal and received by the plurality of first antenna arrays.

[0187] Among them, the first antenna array is the antenna array to which the target terminal belongs.

[0188] Step S502: determining a target antenna array with the largest SNR from multiple first antenna arrays.

[0189] Step S503: For any subcarrier among the multiple subcarriers within the SRS occupied bandwidth, obtain a first power value of the SRS channel estimation of any subcarrier on a receiving antenna corresponding to each antenna port of the target antenna array.

[0190] Step S504: determining a timing deviation of the target terminal according to first power values ​​of the plurality of subcarriers.

[0191] The explanation of steps S501 to S504 can be found in the relevant description in any embodiment of the present application and will not be repeated here.

[0192] Step S505, determining the FFT length according to the SCS between multiple subcarriers.

[0193] Among them, the FFT length can be N in Table 1 FFT , where N FFT Related to the SCS between multiple subcarriers, for example, when the SCS is 15kHz (kilohertz), N FFT Equal to 8192; when SCS is 30kHz, N FFT Equal to 4096.

[0194] Step S506: The product of the FFT length and the timing deviation is used as the second intermediate coefficient.

[0195] In the embodiment of the present application, the product of the FFT length and the timing deviation may be used as the second intermediate coefficient, that is, the second intermediate coefficient may be:

[0196] Step S507: determining the IRT of the target terminal according to the ratio of the second intermediate coefficient to the third number of RBs occupied by the target terminal.

[0197] The third number of RBs occupied by the target terminal is related to the bandwidth occupied by the SRS. For example, the third number of RBs occupied by the target terminal is marked as When the protocol stipulates that the bandwidth occupied by SRS is 272PRB bandwidth, is 144; when the protocol stipulates that the bandwidth occupied by SRS is 68PRB bandwidth, is 36.

[0198] In the embodiment of the present application, the third number of RBs occupied by the target terminal can be calculated based on the second intermediate coefficient and the third number of RBs occupied by the target terminal. The ratio of the target terminal and the IRT of the target terminal are calculated.

[0199] In any embodiment of the present application, the IRT of the target terminal is calculated, for example, as follows:

[0200] 1. According to the second intermediate coefficient and the third quantity The ratio of , determines the third intermediate coefficient.

[0201] As an example, the third intermediate coefficient is marked as It can be calculated using the following formula:

[0202]

[0203] Among them, [] indicates rounding operation.

[0204] 2. Shift the third intermediate coefficient right by the second set number of bits to obtain the fourth intermediate coefficient.

[0205] The second set number of digits is a preset fixed number of digits, for example, the second set number of digits may be 2 digits.

[0206] It should be noted that the present application does not limit the size relationship between the first set number of bits and the second set number of bits. The above example only takes the case where the second set number of bits has the same value as the first set number of bits.

[0207] As an example, taking the second set number of bits as 2 bits as an example, the fourth intermediate coefficient can be

[0208] 3. Determine the IRT of the target terminal according to the fourth intermediate coefficient and the time domain compensation target value configured by the OM module in the access network device.

[0209] Among them, the time domain compensation target value configured by the OM module can be τ in Table 2 target .

[0210] In the embodiment of the present application, the IRT of the target terminal can be determined according to the fourth intermediate coefficient and the time domain compensation target value configured by the OM module in the access network device. For example, the fourth intermediate coefficient can be target The difference between the two is taken as the IRT of the target terminal, that is, IRT is equal to

[0211] The method for determining the IRT of the embodiment of the present application can comprehensively calculate the IRT of the target terminal based on the SCS, the number of RBs occupied by the target terminal and the timing deviation, thereby further improving the accuracy of the IRT calculation.

[0212] The present application proposes a method for calculating the IRT of a terminal based on the antenna array with the strongest SNR in a cell merging scenario. When multiple antenna arrays are far apart and the terminal selects multiple antenna arrays, the antenna array with the strongest SNR can be used to calculate the IRT of the terminal, thereby enhancing the uplink and downlink demodulation performance capabilities and having a strong effect on improving external field performance indicators.

[0213] Specifically, the kth UE IRT of terminals:

[0214] Step 1: Calculate the SNR of multiple antenna arrays to which the terminal belongs (referred to as the first antenna array in this application), and select the first antenna array with the largest SNR as the target antenna array.

[0215] Step 2: Calculate the power value of the SRS channel estimation under the target antenna array after removing the influence of AGC (referred to as the first power value in this application).

[0216] Calculate the first power value of the SRS channel estimation on each receiving antenna at each antenna port of the target antenna array for each subcarrier within the SRS occupied bandwidth:

[0217]

[0218] in, It refers to the channel estimation response before SRS time domain windowing and noise suppression, and its length is N SRS_che , when k TC =2, When k TC =4, Among them, for the bandwidth occupied by SRS is 272PRB bandwidth, is 144; for the bandwidth occupied by SRS is 68PRB bandwidth, is 36.

[0219] The power calculation result is calibrated to Q(32,3), and the AGC adjustment result is The calculation result is calibrated to Q(32,6). The purpose of AGC adjustment is to align the maximum AGC within an OFDM symbol. The specific value of the AGC factor (referred to as the second target factor in this application) is expressed as:

[0220]

[0221] Step 3, average the first power value of each subcarrier on each receiving antenna corresponding to each antenna port to obtain the target power value of each subcarrier:

[0222]

[0223] in, is the number of receiving antennas contained in the target antenna array. The current value is equal to the number of receiving antennas actually deployed in the target antenna array. For example, if the number of antenna ports is 2 and the number of receiving antennas is 4, then m = 3. In the above cumulative calculation, each first power value needs to be right-shifted by m bits before the accumulation, and then the accumulation calculation is performed. The accumulation result is calibrated to Q (32, 6 + m). The right shift operation, that is, the division operation, can be performed by table lookup. The final calculation result (that is, the right-shifted ) is calibrated to Q(32,6).

[0224] Step 4: According to the Determine from each subcarrier The largest target subcarrier, and determine the position index of the target subcarrier (recorded as the first position index in this application, for example, marked as ), and secondly, Shift the first set number of bits to the left to find the timing position. For example, if the first set number of bits is 2 bits, then:

[0225]

[0226] Among them, k sym Indicates the number of OFDM symbols configured for SRS.

[0227] Step 5, perform the following calculations and calculate the timing deviation:

[0228]

[0229] When two windows are used as signal windows, Scale=2, otherwise, Scale=1.

[0230] Step 6, perform the following calculation:

[0231]

[0232] Among them, [] indicates rounding operation; Related to the bandwidth occupied by SRS. For example, when the protocol stipulates that the bandwidth occupied by SRS is 272PRB bandwidth, is 144. When the protocol stipulates that the bandwidth occupied by SRS is 68PRB bandwidth, is 36; N FFT Related to SCS, for example, when SCS is 15kHz, N FFT Equal to 8192, when SCS is 30kHz, N FFT Equal to 4096.

[0233] Step 7: Shift right by the second set number of digits and subtract τ target , and get the IRT:

[0234] Assume that the second set bit is 2 bits, and IRT is equal to

[0235] In summary, in the cell merging scenario, calculating IRT based on the antenna array with the strongest SNR can enhance the uplink and downlink demodulation performance. Compared with the existing solution, it has a stronger effect on improving the uplink MCS and optimizing the field performance indicators. That is, when the antenna arrays are too far apart and the terminal selects multiple antenna arrays, using the antenna array with the strongest SNR to calculate IRT can prevent the generation of negative gain and enhance the uplink and downlink demodulation performance.

[0236] The technical solution provided in the embodiment of the present application can be applicable to a variety of systems, especially 5G systems. For example, the applicable system can be a global system of mobile communication (Global System of Mobile communication, referred to as GSM) system, code division multiple access (Code Division Multiple Access, referred to as CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, referred to as WCDMA) general packet radio service (General Packet Radio Service, referred to as GPRS) system, long term evolution (long term evolution, referred to as LTE) system, LTE frequency division duplex (Frequency Division Duplex, referred to as FDD) system, LTE time division duplex (time division duplex, referred to as TDD) system, advanced long term evolution (Long Term Evolution Advanced, referred to as LTE-A) system, Universal Mobile Telecommunication System (Universal Mobile Telecommunication System, referred to as UMTS), Worldwide interoperability for Microwave Access (Worldwide interoperability for Microwave Access, referred to as WiMAX) system, 5G new air interface (NewRadio, referred to as NR) system, etc. These various systems include terminals and network equipment. The system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0237] In order to implement the above embodiments, the present application also proposes an access network device.

[0238] Figure 6 A schematic diagram of the structure of an access network device provided in an embodiment of the present application.

[0239] like Figure 6 As shown, the access network device may include: a transceiver 600 , a processor 610 , and a memory 620 .

[0240] Among them, the memory 620 is used to store computer programs; the transceiver 600 is used to send and receive data under the control of the processor 610; the processor 610 is used to read the computer program in the memory 620 and perform the following operations: determine the signal-to-noise ratio SNR of multiple first antenna arrays based on the measurement reference signal SRS sent by the target terminal received by multiple first antenna arrays; wherein the first antenna array is the antenna array to which the target terminal belongs; determine the target antenna array with the largest SNR from the multiple first antenna arrays; for any subcarrier among the multiple subcarriers within the SRS occupied bandwidth, obtain the first power value of the SRS channel estimation of any subcarrier on the receiving antenna corresponding to each antenna port of the target antenna array; determine the IRT of the target terminal based on the first power values ​​of the multiple subcarriers.

[0241] Among them, Figure 6 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 610 and memory represented by memory 620. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 600 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which transmission medium may include a wireless channel, a wired channel, an optical cable, and the like. The processor 610 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 610 when performing operations.

[0242] The processor 610 may be a CPU, an ASIC, an FPGA or a CPLD, and the processor 610 may also adopt a multi-core architecture.

[0243] As a possible implementation method, the processor 610 executes, for any subcarrier among multiple subcarriers within the SRS occupied bandwidth, to obtain the first power value of the SRS channel estimation of any subcarrier on the receiving antenna corresponding to each antenna port of the target antenna array, specifically: for any subcarrier, obtain the time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port of the target antenna array; wherein the OFDM symbol is the symbol occupied by the SRS, and j and k are both positive integers; obtain the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; wherein the first target factor is used to indicate the inverse discrete Fourier transform IDFT shift factor and automatic gain control AGC scaling factor obtained by frequency domain processing; according to the time domain channel estimation result and the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port, determine the first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port.

[0244] As a possible implementation method, the processor 610 executes, based on the time domain channel estimation result and the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port, to determine the first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port, specifically: performing AGC adjustment on the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port to obtain the second target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; determining the first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port according to the time domain channel estimation result and the second target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port.

[0245] As a possible implementation method, the processor 610 determines the IRT of the target terminal based on the first power values ​​of multiple subcarriers, specifically: determines the timing deviation of the target terminal based on the first power values ​​of multiple subcarriers; determines the IRT of the target terminal based on the timing deviation.

[0246] As a possible implementation method, the processor 610 executes to determine the timing deviation of the target terminal based on the first power values ​​of multiple subcarriers, specifically: for any subcarrier within the SRS occupied bandwidth, according to multiple first power values ​​of any subcarrier, determine the target power value of any subcarrier; determine the target subcarrier with the largest target power value from multiple subcarriers; determine the timing deviation of the target terminal according to the first position index of the target subcarrier.

[0247] As a possible implementation method, the processor 610 determines the target power value of any subcarrier within the SRS occupied bandwidth according to multiple first power values ​​of any subcarrier, specifically: obtaining a first number of antenna ports included in the target antenna array and a second number of receiving antennas included in the target antenna array; determining a target value m according to the product of the first number and the second number; for any subcarrier within the SRS occupied bandwidth, respectively right-shifting the multiple first power values ​​of any subcarrier by m places to obtain multiple second power values ​​of any subcarrier; and taking the sum of the multiple second power values ​​of any subcarrier as the target power value of any subcarrier.

[0248] As a possible implementation method, the processor 610 executes to determine the timing deviation of the target terminal based on the first position index of the target subcarrier, specifically: shift the first position index left by a first set number of bits to obtain a second position index; determine the length of the time domain channel estimation result of the target subcarrier on the OFDM symbol received by the receiving antenna corresponding to any antenna port based on the third number of resource blocks RB occupied by the target terminal and the frequency domain offset of the SRS; determine the timing deviation of the target terminal based on the second position index and the length.

[0249] As a possible implementation method, the processor 610 determines the timing deviation of the target terminal based on the second position index and the length, specifically: determines a reference value based on the product of the length and the first set coefficient, and determines whether the second position index is less than the reference value; when the second position index is less than the reference value, uses the second position index as the timing deviation; when the second position index is greater than or equal to the reference value, determines the first intermediate coefficient based on the product of the reference value and the second set coefficient; wherein the second set coefficient is less than the first set coefficient; determines the timing deviation based on the difference between the second position index and the first intermediate coefficient.

[0250] As a possible implementation method, the processor 610 determines the IRT of the target terminal according to the timing deviation, specifically: determines the fast Fourier transform FFT length according to the subcarrier spacing SCS between multiple subcarriers; uses the product of the FFT length and the timing deviation as the second intermediate coefficient; determines the IRT of the target terminal according to the ratio of the second intermediate coefficient and the third number of RBs occupied by the target terminal.

[0251] As a possible implementation method, the processor 610 determines the IRT of the target terminal based on the ratio of the second intermediate coefficient and the third number of RBs occupied by the target terminal, specifically: determines the third intermediate coefficient based on the ratio of the second intermediate coefficient and the third number; right-shifts the third intermediate coefficient by a second set number of bits to obtain a fourth intermediate coefficient; determines the IRT based on the fourth intermediate coefficient and the time domain compensation target value configured by the OM module in the access network device.

[0252] It should be noted that the access network device provided in the embodiment of the present application can achieve the above Figures 1 to 5 All the method steps implemented in the method embodiment can achieve the same technical effect, and the parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0253] With the above Figures 1 to 5 Corresponding to the method for determining the IRT provided in the embodiment, the present application also provides an apparatus for determining the IRT. Figures 1 to 5 The IRT determination method provided in the embodiment corresponds to the IRT determination method, so the implementation method of the IRT determination method is also applicable to the IRT determination device provided in the embodiment of the present application, and will not be described in detail in the embodiment of the present application.

[0254] Figure 7 A schematic diagram of the structure of an IRT determination device provided in an embodiment of the present application.

[0255] like Figure 7 As shown, the IRT determination device 700 is applied to an access network device and may include: a first determination unit 710 , a second determination unit 720 , an acquisition unit 730 and a third determination unit 740 .

[0256] The first determination unit 710 is used to determine the signal-to-noise ratios SNRs of the multiple first antenna arrays according to the measurement reference signals SRS sent by the target terminal and received by the multiple first antenna arrays; wherein the first antenna array is the antenna array to which the target terminal belongs.

[0257] The second determining unit 720 is configured to determine a target antenna array with the largest SNR from the multiple first antenna arrays.

[0258] The acquisition unit 730 is configured to acquire, for any subcarrier among multiple subcarriers within the SRS occupied bandwidth, a first power value of the SRS channel estimation of any subcarrier on a receiving antenna corresponding to each antenna port of a target antenna array.

[0259] The third determining unit 740 is configured to determine the IRT of the target terminal according to the first power values ​​of the multiple subcarriers.

[0260] As a possible implementation method, the acquisition unit 730 is specifically used to: for any subcarrier, obtain the time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port of the target antenna array; wherein the OFDM symbol is the symbol occupied by the SRS, and j and k are both positive integers; obtain the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; wherein the first target factor is used to indicate the inverse discrete Fourier transform IDFT shift factor and automatic gain control AGC scaling factor obtained by frequency domain processing; determine the first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port based on the time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port and the first target factor.

[0261] As a possible implementation method, the acquisition unit 730 is specifically used to: perform AGC adjustment on the first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port to obtain the second target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; determine the first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port based on the time domain channel estimation result and the second target factor on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port.

[0262] As a possible implementation manner, the third determining unit 740 is specifically configured to: determine a timing deviation of the target terminal according to first power values ​​of multiple subcarriers; and determine an IRT of the target terminal according to the timing deviation.

[0263] As a possible implementation method, the third determination unit 740 is specifically used to: determine the target power value of any subcarrier within the SRS occupied bandwidth based on multiple first power values ​​of any subcarrier; determine the target subcarrier with the largest target power value from multiple subcarriers; and determine the timing deviation of the target terminal based on the first position index of the target subcarrier.

[0264] As a possible implementation method, the third determination unit 740 is specifically used to: obtain a first number of antenna ports included in the target antenna array, and a second number of receiving antennas included in the target antenna array; determine a target value m based on the product of the first number and the second number; for any subcarrier within the SRS occupied bandwidth, respectively right-shift multiple first power values ​​of any subcarrier by m places to obtain multiple second power values ​​of any subcarrier; and use the sum of the multiple second power values ​​of any subcarrier as the target power value of any subcarrier.

[0265] As a possible implementation method, the third determination unit 740 is specifically used to: shift the first position index left by a first set number of bits to obtain a second position index; determine the length of the time domain channel estimation result of the target subcarrier on the OFDM symbol received by the receiving antenna corresponding to any antenna port based on the third number of resource blocks RB occupied by the target terminal and the frequency domain offset of the SRS; determine the timing deviation of the target terminal based on the second position index and the length.

[0266] As a possible implementation method, the third determination unit 740 is specifically used to: determine a reference value based on the product of the length and the first set coefficient, and determine whether the second position index is less than the reference value; when the second position index is less than the reference value, use the second position index as the timing deviation; when the second position index is greater than or equal to the reference value, determine the first intermediate coefficient based on the product of the reference value and the second set coefficient; wherein the second set coefficient is less than the first set coefficient; and determine the timing deviation based on the difference between the second position index and the first intermediate coefficient.

[0267] As a possible implementation method, the third determination unit 740 is specifically used to: determine the fast Fourier transform FFT length according to the subcarrier spacing SCS between multiple subcarriers; use the product of the FFT length and the timing deviation as the second intermediate coefficient; determine the IRT of the target terminal according to the ratio of the second intermediate coefficient and the third number of RBs occupied by the target terminal.

[0268] As a possible implementation method, the third determination unit 740 is specifically used to: determine the third intermediate coefficient based on the ratio of the second intermediate coefficient and the third number; right-shift the third intermediate coefficient by a second set number of bits to obtain a fourth intermediate coefficient; and determine the IRT based on the fourth intermediate coefficient and the time domain compensation target value configured by the OM module in the access network device.

[0269] It should be noted that the above-mentioned IRT determination device provided in the embodiment of the present application can achieve the above-mentioned Figures 1 to 5 All the method steps implemented in the method embodiment can achieve the same technical effect, and the parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0270] It should be noted that each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0271] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of each embodiment method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store program code.

[0272] In order to implement the above embodiments, the present application also proposes a processor-readable storage medium.

[0273] The processor-readable storage medium stores a computer program for causing the processor to execute the present application. Figures 1 to 5 The method for determining the IRT of any embodiment.

[0274] Among them, the processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NANDFLASH), solid-state drive (SSD)), etc.

[0275] In order to implement the above embodiments, the present application also proposes a computer program product.

[0276] The computer program product includes a computer program which, when executed by a processor, implements the present application. Figures 1 to 5 The method for determining the IRT of any embodiment.

[0277] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt 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, etc.) that contain computer-usable program code.

[0278] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer executable instructions. These computer executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0279] These processor executable instructions may also be stored in a processor readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0280] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0281] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for determining uplink timing synchronization IRT, characterized in that: Applied to access network equipment, including: Determine the signal-to-noise ratio SNR of the plurality of first antenna arrays according to the measurement reference signal SRS sent by the target terminal and received by the plurality of first antenna arrays; wherein the first antenna array is the antenna array to which the target terminal belongs; Determine the target antenna array with the largest SNR from the multiple first antenna arrays; For any subcarrier among the multiple subcarriers within the SRS occupied bandwidth, obtain a first power value of an SRS channel estimation of the any subcarrier on a receiving antenna corresponding to each antenna port of the target antenna array; An IRT of the target terminal is determined according to the first power values ​​of the multiple subcarriers.

2. The method according to claim 1, characterized in that The acquiring, for any subcarrier among the multiple subcarriers within the SRS occupied bandwidth, a first power value of an SRS channel estimation of the any subcarrier on a receiving antenna corresponding to each antenna port of the target antenna array includes: For any subcarrier, obtain a time domain channel estimation result of the any subcarrier on an OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port of the target antenna array; wherein the OFDM symbol is a symbol occupied by the SRS, and j and k are both positive integers; Obtaining a first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; wherein the first target factor is used to indicate an inverse discrete Fourier transform IDFT shift factor and an automatic gain control AGC scaling factor obtained by frequency domain processing; Determine a first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port according to a time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port and a first target factor.

3. The method according to claim 2, characterized in that The determining, according to a time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port and a first target factor, a first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port includes: Performing AGC adjustment on a first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port to obtain a second target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; Determine a first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port according to a time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port and a second target factor.

4. The method according to claim 1, characterized in that: The determining, according to the first power values ​​of the multiple subcarriers, the IRT of the target terminal includes: Determining a timing deviation of the target terminal according to first power values ​​of the multiple subcarriers; The IRT of the target terminal is determined based on the timing deviation.

5. The method according to claim 4, characterized in that The determining, according to the first power values ​​of the multiple subcarriers, the timing deviation of the target terminal includes: For any subcarrier within the SRS occupied bandwidth, determining a target power value of the any subcarrier according to multiple first power values ​​of the any subcarrier; Determine a target subcarrier having a maximum target power value from the multiple subcarriers; A timing deviation of the target terminal is determined according to the first position index of the target subcarrier.

6. The method according to claim 5, characterized in that The determining, for any subcarrier within the SRS occupied bandwidth, a target power value of any subcarrier according to a plurality of first power values ​​of the any subcarrier, comprises: Acquire a first number of antenna ports included in the target antenna array and a second number of receiving antennas included in the target antenna array; Determine a target value m according to the product of the first number and the second number; For any subcarrier within the SRS occupied bandwidth, right-shift multiple first power values ​​of the any subcarrier by m bits respectively to obtain multiple second power values ​​of the any subcarrier; The sum of the multiple second power values ​​of any one of the subcarriers is used as the target power value of the any one of the subcarriers.

7. The method according to claim 5, characterized in that The determining, according to the first position index of the target subcarrier, the timing deviation of the target terminal includes: Shift the first position index left by a first set number of bits to obtain a second position index; Determine, according to a third number of resource blocks RB occupied by the target terminal and the frequency domain offset of the SRS, the length of a time domain channel estimation result of the target subcarrier on an OFDM symbol received by a receiving antenna corresponding to any antenna port; A timing deviation of the target terminal is determined according to the second location index and the length.

8. The method according to claim 7, characterized in that The determining, according to the second position index and the length, the timing deviation of the target terminal includes: Determine a reference value according to the product of the length and a first set coefficient, and judge whether the second position index is less than the reference value; When the second position index is less than the reference value, using the second position index as the timing deviation; In the case where the second position index is greater than or equal to the reference value, determining a first intermediate coefficient according to the product of the reference value and a second set coefficient; wherein the second set coefficient is less than the first set coefficient; The timing offset is determined based on a difference between the second position index and the first intermediate coefficient.

9. The method according to claim 4, characterized in that The determining the IRT of the target terminal according to the timing deviation includes: Determine a fast Fourier transform (FFT) length according to a subcarrier spacing (SCS) between the multiple subcarriers; Taking the product of the FFT length and the timing deviation as the second intermediate coefficient; The IRT of the target terminal is determined according to a ratio of the second intermediate coefficient and a third number of RBs occupied by the target terminal.

10. The method according to claim 9, characterized in that The determining the IRT of the target terminal according to a ratio of the second intermediate coefficient to a third number of RBs occupied by the target terminal comprises: determining a third intermediate coefficient according to a ratio of the second intermediate coefficient to the third quantity; Shifting the third intermediate coefficient right by a second set number of bits to obtain a fourth intermediate coefficient; The IRT is determined according to the fourth intermediate coefficient and a time domain compensation target value configured by an OM module in the access network device.

11. An access network device, characterized in that: Including memory, transceiver, processor; a memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: Determine the signal-to-noise ratio SNR of the plurality of first antenna arrays according to the measurement reference signal SRS sent by the target terminal and received by the plurality of first antenna arrays; wherein the first antenna array is the antenna array to which the target terminal belongs; Determine the target antenna array with the largest SNR from the multiple first antenna arrays; For any subcarrier among the multiple subcarriers within the SRS occupied bandwidth, obtain a first power value of an SRS channel estimation of the any subcarrier on a receiving antenna corresponding to each antenna port of the target antenna array; An IRT of the target terminal is determined according to the first power values ​​of the multiple subcarriers.

12. The access network device according to claim 11, characterized in that: The processor executes, for any subcarrier among multiple subcarriers within the SRS occupied bandwidth, obtaining a first power value of an SRS channel estimation of the any subcarrier on a receiving antenna corresponding to each antenna port of the target antenna array, specifically: For any subcarrier, obtain a time domain channel estimation result of the any subcarrier on an OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port of the target antenna array; wherein the OFDM symbol is a symbol occupied by the SRS, and j and k are both positive integers; Obtaining a first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; wherein the first target factor is used to indicate an inverse discrete Fourier transform IDFT shift factor and an automatic gain control AGC scaling factor obtained by frequency domain processing; Determine a first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port according to a time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port and a first target factor.

13. The access network device according to claim 12, characterized in that: The processor executes, according to a time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port and a first target factor, determining a first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port, specifically: Performing AGC adjustment on a first target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port to obtain a second target factor of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port; Determine a first power value of any subcarrier on the kth receiving antenna corresponding to the jth antenna port according to a time domain channel estimation result of any subcarrier on the OFDM symbol received by the kth receiving antenna corresponding to the jth antenna port and a second target factor.

14. The access network device according to claim 11, characterized in that: The processor determines the IRT of the target terminal according to the first power values ​​of the multiple subcarriers, specifically: Determining a timing deviation of the target terminal according to first power values ​​of the multiple subcarriers; The IRT of the target terminal is determined based on the timing deviation.

15. The access network device according to claim 14, characterized in that: The processor determines the timing deviation of the target terminal according to the first power values ​​of the multiple subcarriers, specifically: For any subcarrier within the SRS occupied bandwidth, determining a target power value of the any subcarrier according to multiple first power values ​​of the any subcarrier; Determine a target subcarrier having a maximum target power value from the multiple subcarriers; A timing deviation of the target terminal is determined according to the first position index of the target subcarrier.

16. The access network device according to claim 15, characterized in that: The processor determines, for any subcarrier in the SRS occupied bandwidth, a target power value of the any subcarrier according to multiple first power values ​​of the any subcarrier, specifically: Acquire a first number of antenna ports included in the target antenna array and a second number of receiving antennas included in the target antenna array; Determine a target value m according to the product of the first number and the second number; For any subcarrier within the SRS occupied bandwidth, right-shift multiple first power values ​​of the any subcarrier by m bits respectively to obtain multiple second power values ​​of the any subcarrier; The sum of the multiple second power values ​​of any one of the subcarriers is used as the target power value of the any one of the subcarriers.

17. The access network device according to claim 15, characterized in that: The processor determines the timing deviation of the target terminal according to the first position index of the target subcarrier, specifically: Shift the first position index left by a first set number of bits to obtain a second position index; Determine, according to a third number of resource blocks RB occupied by the target terminal and the frequency domain offset of the SRS, the length of a time domain channel estimation result of the target subcarrier on an OFDM symbol received by a receiving antenna corresponding to any antenna port; A timing deviation of the target terminal is determined according to the second location index and the length.

18. The access network device according to claim 17, characterized in that: The processor determines the timing deviation of the target terminal according to the second location index and the length, specifically: Determine a reference value according to the product of the length and a first set coefficient, and judge whether the second position index is less than the reference value; When the second position index is less than the reference value, using the second position index as the timing deviation; In the case where the second position index is greater than or equal to the reference value, determining a first intermediate coefficient according to the product of the reference value and a second set coefficient; wherein the second set coefficient is less than the first set coefficient; The timing offset is determined based on a difference between the second position index and the first intermediate coefficient.

19. The access network device according to claim 14, characterized in that: The processor determines the IRT of the target terminal according to the timing deviation, specifically: Determine a fast Fourier transform (FFT) length according to a subcarrier spacing (SCS) between the multiple subcarriers; Taking the product of the FFT length and the timing deviation as the second intermediate coefficient; The IRT of the target terminal is determined according to a ratio of the second intermediate coefficient and a third number of RBs occupied by the target terminal.

20. The access network device according to claim 19, characterized in that: The processor determines the IRT of the target terminal according to a ratio of the second intermediate coefficient to a third number of RBs occupied by the target terminal, specifically: determining a third intermediate coefficient according to a ratio of the second intermediate coefficient to the third quantity; Shifting the third intermediate coefficient right by a second set number of bits to obtain a fourth intermediate coefficient; The IRT is determined according to the fourth intermediate coefficient and a time domain compensation target value configured by an OM module in the access network device.

21. A device for determining uplink timing synchronization IRT, characterized in that: Applied to access network equipment, including: A first determining unit, configured to determine a signal-to-noise ratio SNR of the plurality of first antenna arrays according to a measurement reference signal SRS sent by a target terminal and received by the plurality of first antenna arrays; wherein the first antenna array is an antenna array to which the target terminal belongs; A second determining unit, configured to determine the target antenna array with the largest SNR from the multiple first antenna arrays; an acquiring unit, configured to acquire, for any subcarrier among a plurality of subcarriers within the SRS occupied bandwidth, a first power value of an SRS channel estimation of the any subcarrier on a receiving antenna corresponding to each antenna port of the target antenna array; The third determining unit is used to determine the IRT of the target terminal according to the first power values ​​of the multiple subcarriers.

22. A processor-readable storage medium, characterized in that: The processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the method according to any one of claims 1 to 10.

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