Radio frequency parameter calibration method and system of 5G NR mobile terminal

Abstract

The invention discloses a radio frequency parameter calibration method of a 5G NR mobile terminal. All single-carrier frequency bands are divided into three types: a reference frequency band, a complete multiplexing frequency band and a partial multiplexing frequency band, and a complete calibration mode, a data multiplexing mode and an incremental calibration mode are executed respectively. A single frequency band of in-band carrier aggregation, a combination of a plurality of frequency bands of inter-band carrier aggregation and a combination of a plurality of frequency bands of E-UTRA-NR dual connectivity are respectively processed by referring to three modes. According to the invention, the overall radio frequency parameter calibration time of the 5G NR mobile terminal is shortened, the volume and occupied storage space of the overall calibration data are reduced, and the query time for searching the radio frequency parameters needing to be compensated in the overall calibration data is shortened.

Description

Technical Field

[0001] The present application relates to a method for optimizing radio frequency parameter calibration of a mobile terminal. Background Art

[0002] In the manufacturing process of mobile phones and other wireless communication devices (hereinafter referred to as mobile terminals), RF calibration is a core process used to ensure the performance consistency of mobile terminals. RF calibration plays the important role of compensating for the following three key variables: (1) Manufacturing tolerance compensation, eliminating the ±5% process deviation of semiconductor components. (2) Environmental adaptability calibration, covering parameter drift compensation in the operating temperature range of -40°C to 85°C. (3) Lifecycle management, hedging the annual performance degradation of RF components by 2%. In order to eliminate these effects, each mobile terminal needs to undergo RF calibration before leaving the factory to measure and calculate the error data of various RF parameters and store them in storage media such as NVM (non-volatile memory). During normal use of the mobile terminal, the CPU reads the calibration data in the NVM and uses a certain algorithm to compensate for the RF parameters that need to be compensated.

[0003] The existing method for calibrating radio frequency parameters of mobile terminals is to perform calibration for each mobile terminal individually. The calibration items are mainly performed on core radio frequency parameters, including AFC (automatic frequency control), AGC (automatic gain control) and APC (automatic power control).

[0004] With the advent of the 5G NR (New Radio) era, mobile terminals newly support 5G frequency bands on the basis of the original frequency bands, in addition to 5G CA (Carrier Aggregation) combinations and EN-DC (E-UTRA-NR Dual Connectivity) combinations. Among them, E-UTRA represents Evolved UMTS Terrestrial Radio Access or Evolved Universal Terrestrial Radio Access, which usually refers to LTE mobile communication technology. UMTS represents Universal Mobile Telecommunications System. This brings the following challenges to the RF calibration of mobile terminals. The first is the pressure of spectrum expansion. The number of sub-6 GHz (below 6 GHz) frequency bands has increased to 56, which is 240% higher than that of LTE frequency bands. The second is the complexity of combinations. There are 32 new scenarios for CA combinations and 57 new scenarios for EN-DC combinations. If the existing RF parameter calibration method is used, the calibration time of a single mobile terminal will be multiplied, the calibration data will be multiplied, and the NVM storage space required for the calibration data will also be multiplied, which will greatly increase the production time of mobile terminals and greatly increase the manufacturing cost of mobile terminals. In addition, the time for real-time query of the RF parameters that need to be compensated in the multiplied calibration data is also increased. SUMMARY

[0005] The technical problem to be solved by the present application is how to reduce the RF calibration time of the mobile terminal, reduce the amount of calibration data, thereby reducing the NVM storage space required for the calibration data, and reducing the query time in the calibration data.

[0006] In order to solve the above technical problems, the present application proposes a method for calibrating the radio frequency parameters of a 5G NR mobile terminal, comprising the following steps. Step S1: Set non-overlapping frequency band indexes for all frequency bands and frequency band combinations supported by the 5G NR mobile terminal. Step S2: Divide all single-carrier frequency bands into three categories: reference frequency band, fully reused frequency band, and partially reused frequency band. If the first condition is met between two single-carrier frequency bands, one of the frequency bands is called the anchor frequency band and the other frequency band is called the fully reused frequency band; the first condition refers to: the frequency range overlap of the two frequency bands is ≥90%, and the combination of power amplifiers and filters in the transmitting links of the two frequency bands is the same, and the combination of low-noise amplifiers and filters in the receiving links of the two frequency bands is the same, and the topology of the RF switch matrices of the two frequency bands is consistent. If two single-carrier frequency bands meet the second condition, one of the frequency bands is designated as the anchor frequency band and the other as the partially reused frequency band. This second condition means that the frequency range overlap between the two frequency bands is ≥90%, the power amplifier and filter combinations in the transmit chains of the two frequency bands are identical, and the low-noise amplifier and filter combinations in the receive chains of the two frequency bands are identical, but the RF switch matrix topologies of the two frequency bands are different. All single-carrier frequency bands except the fully reused and partially reused frequency bands are reference frequency bands. Step S3: A full calibration process is performed on each reference frequency band to obtain calibration data for each reference frequency band, and the frequency band index and calibration data for each reference frequency band are saved. This is the full calibration mode. Step S4: No calibration is performed on each fully reused frequency band. Only the frequency band index of each fully reused frequency band and the frequency band index of the corresponding anchor frequency band are saved, thereby reusing the calibration data of the corresponding anchor frequency band. This is the data reuse mode. A single-point calibration process is performed for each incremental power point between each partially reused frequency band and the corresponding anchor frequency band due to the different RF switch matrix topology, obtaining one or more single-point calibration data. The frequency band index of each partially reused frequency band, the frequency band index of the corresponding anchor frequency band, and the single-point calibration data of all incremental power points are saved, thereby reusing the calibration data of the corresponding anchor frequency band. This is the incremental calibration mode. Step S5: For each single frequency band in intra-band carrier aggregation, whether the first condition or the second condition is met is determined between the single carrier frequency band. Also, for each frequency band in the combination of multiple frequency bands in inter-band carrier aggregation and the single carrier frequency band, whether the first condition or the second condition is met is determined. If the first condition is met, the data multiplexing mode is adopted; if the second condition is met, the incremental calibration mode is adopted; otherwise, the full calibration mode is adopted. Step S6: For each frequency band in the combination of multiple frequency bands in E-UTRA-NR dual connectivity, whether the first condition or the second condition is met between the single carrier frequency band and the single carrier frequency band is determined. If the first condition is met, the data multiplexing mode is adopted; if the second condition is met, the incremental calibration mode is adopted; otherwise, the full calibration mode is adopted.The step S5 and step S6 may be performed either before or simultaneously.

[0007] Furthermore, in step S1, all frequency bands and frequency band combinations supported by the 5G NR mobile terminal include: a single carrier frequency band, a single frequency band of intra-band carrier aggregation, an inter-band carrier aggregation and a combination of multiple frequency bands of E-UTRA-NR dual connectivity.

[0008] Furthermore, in step S1, if the frequency ranges of two frequency bands are completely or partially the same, different frequency band indexes are set respectively; if the frequency ranges of two frequency band combinations are completely or partially the same, different frequency band indexes are set respectively.

[0009] Furthermore, in step S2, when determining the anchor frequency bands, the total number of anchor frequency bands is made as small as possible.

[0010] Furthermore, in step S2, the reference frequency band completely includes all anchor frequency bands.

[0011] Furthermore, during or after the execution of steps S4, S5, and S6, step S7 is also included: establishing a reusable frequency band relationship matrix, which records the multiplexing relationship between each frequency band and frequency band combination supported by the 5G NR mobile terminal and the single carrier frequency band.

[0012] Furthermore, in step S7, the recorded content includes: the multiplexing relationship between single carrier frequency bands, the multiplexing relationship between a single frequency band of intra-band carrier aggregation and a single carrier frequency band, the multiplexing relationship between a combination of multiple frequency bands of inter-band carrier aggregation and a single carrier frequency band, and the multiplexing relationship between a combination of multiple frequency bands of E-UTRA-NR dual connection and a single carrier frequency band.

[0013] This application also proposes a radio frequency parameter calibration system for a 5G NR mobile terminal, comprising a frequency band index setting unit, a single carrier frequency band classification unit, a reference frequency band calibration unit, a single carrier frequency band multiplexing unit, a carrier aggregation frequency band and frequency band combination processing unit, and a dual connection frequency band combination processing unit. The frequency band index setting unit is used to set non-overlapping frequency band indices for all frequency bands and frequency band combinations supported by the 5G NR mobile terminal. The single-carrier frequency band classification unit is used to classify all single-carrier frequency bands into three categories: fully reused frequency bands, partially reused frequency bands, and reference frequency bands. When two single-carrier frequency bands meet a first condition, one of the frequency bands is called an anchor frequency band and the other frequency band is called a fully reused frequency band. The first condition is that the frequency range overlap of the two frequency bands is ≥90%, the combination of power amplifiers and filters in the transmit chains of the two frequency bands is the same, the combination of low-noise amplifiers and filters in the receive chains of the two frequency bands is the same, and the topologies of the radio frequency switch matrices of the two frequency bands are consistent. When two single-carrier frequency bands meet a second condition, one of the frequency bands is called an anchor frequency band and the other frequency band is called a partially reused frequency band. The second condition is that the frequency range overlap of the two frequency bands is ≥90%, the combination of power amplifiers and filters in the transmit chains of the two frequency bands is the same, the combination of low-noise amplifiers and filters in the receive chains of the two frequency bands is the same, but the topologies of the radio frequency switch matrices of the two frequency bands are different. Among all single-carrier frequency bands, frequency bands other than the fully reused frequency band and the partially reused frequency band are reference frequency bands. The reference frequency band calibration unit is used to perform a complete calibration process on each reference frequency band, obtain calibration data for each reference frequency band, and save the frequency band index and calibration data of each reference frequency band in the NVM; this is the complete calibration mode. The single-carrier frequency band multiplexing unit is used to not perform a calibration operation on each fully multiplexed frequency band, but only save the frequency band index of each fully multiplexed frequency band and the frequency band index of the corresponding anchor frequency band; this is the data multiplexing mode; the single-carrier frequency band multiplexing unit is also used to perform a single-point calibration process on each incremental power point caused by the different topology of the RF switch matrix between each partially multiplexed frequency band and the corresponding anchor frequency band, and obtain one or more single-point calibration data; save the frequency band index of each partially multiplexed frequency band, the frequency band index of the corresponding anchor frequency band, and the single-point calibration data of all incremental power points; this is the incremental calibration mode. The carrier aggregation frequency band and frequency band combination processing unit is used to determine whether the first condition or the second condition is met between each single frequency band of intra-band carrier aggregation and the single carrier frequency band, and is also used to determine whether the first condition or the second condition is met between each frequency band in the combination of multiple frequency bands of inter-band carrier aggregation and the single carrier frequency band; if the first condition is met, the data multiplexing mode is adopted; if the second condition is met, the incremental calibration mode is adopted; otherwise, the full calibration mode is adopted.The dual-connection frequency band combination processing unit is used to determine whether each frequency band in the combination of multiple frequency bands of the E-UTRA-NR dual connection and the single carrier frequency band meets the first condition or the second condition; if the first condition is met, the data multiplexing mode is adopted; if the second condition is met, the incremental calibration mode is adopted; otherwise, the complete calibration mode is adopted.

[0014] The technical effects achieved by this application are: shortening the overall RF parameter calibration time of 5G NR mobile terminals, reducing the volume of overall calibration data and the storage space occupied, and avoiding the time and data storage costs associated with repeated calibration of the same or similar RF paths. This application optimizes storage resources while ensuring calibration accuracy. This application also shortens the query time for finding RF parameters that require compensation in the overall calibration data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a flow chart of the RF parameter calibration method for a 5G NR mobile terminal proposed in this application.

[0016] Figure 2 This is a structural diagram of the RF parameter calibration system for the 5G NR mobile terminal proposed in this application.

[0017] Explanation of the reference numerals in the figure: frequency band index setting unit 1, single carrier frequency band classification unit 2, reference frequency band calibration unit 3, single carrier frequency band multiplexing unit 4, carrier aggregation frequency band and frequency band combination processing unit 5, dual connection frequency band combination processing unit 6. DETAILED DESCRIPTION

[0018] Research on 3GPP Release 15 to 3GPP Release 17 standards shows that in the Sub-6 GHz band, which is 5G NR's FR1 (Frequency Range 1), there is frequency overlap between the 4G LTE band and the 5G NR band.

[0019] Table 1 shows examples of completely overlapping frequency bands between NR and LTE bands and their corresponding frequency ranges.

[0020] NR band LTE frequency bands Uplink frequency (MHz) Downlink frequency (MHz) n1 Band 1 1920-1980 2110-2170 n3 Band 3 1710-1785 1805-1880 n5 Band 5 824-849 869-894 n8 Band 8 880-915 925-960 n28 Band 28 703-748 758-803

[0021] Table 1

[0022] Table 2 shows examples of partially overlapping frequency bands between NR and LTE bands and their corresponding frequency ranges.

[0023]

[0024]

[0025] Table 2

[0026] For fully or partially overlapping NR and LTE bands, the uplink and downlink RF path architectures are likely identical. For example, if the uplink and downlink RF paths for NRn1 and LTE Band1 are identical, only one band needs to be calibrated, and the calibration results for the other band can be fully reused.

[0027] See also Figure 1 The RF parameter calibration method for a 5G NR mobile terminal proposed in this application includes the following steps.

[0028] Step S1: Set a unique and non-overlapping frequency band index for all frequency bands and frequency band combinations supported by the 5G NR mobile terminal. All frequency bands and frequency band combinations supported by the 5G NR mobile terminal are divided into the following seven parts: (1) each LTE single carrier frequency band; (2) each NR single carrier frequency band; (3) each single LTE frequency band of LTE intra-band carrier aggregation (CA); (4) each single NR frequency band of NR intra-band carrier aggregation; (5) each combination of multiple LTE frequency bands of LTE inter-band carrier aggregation; (6) each combination of multiple NR frequency bands of NR inter-band carrier aggregation; (7) each combination of one or more LTE frequency bands and one or more NR frequency bands of E-UTRA-NR dual connectivity (EN-DC). Among them, (1) and (2) belong to single carrier frequency bands, (3) and (4) belong to single frequency bands of intra-band carrier aggregation, (5) and (6) and (7) belong to the combination of multiple frequency bands of inter-band carrier aggregation and E-UTRA-NR dual connectivity. If the frequency ranges of two frequency bands are completely or partially identical, for example, an LTE single-carrier frequency band and an NR single-carrier frequency band have completely or partially identical frequency ranges, different frequency band indices should be set for each. If the frequency ranges of two frequency band combinations are completely or partially identical, different frequency band indices should also be set for each.

[0029] Step S2: All LTE single-carrier frequency bands and NR single-carrier frequency bands supported by the 5G NR mobile terminal are divided into three categories: reference frequency band, fully reused frequency band, and partially reused frequency band.

[0030] If a 5G NR mobile terminal supports an LTE single-carrier frequency band and an NR single-carrier frequency band that meet the first condition, one of the frequency bands is called the anchor frequency band and the other is called the fully reused frequency band. The first condition means that the frequency range overlap of the two frequency bands is ≥ 90%, the power amplifier and filter combination in the transmit chain of the two frequency bands is the same, the low-noise amplifier and filter combination in the receive chain of the two frequency bands is the same, and the topology of the RF switch matrix of the two frequency bands is consistent.

[0031] If a certain LTE single-carrier frequency band and a certain NR single-carrier frequency band supported by the 5G NR mobile terminal meet the second condition, one of the frequency bands is called an anchor frequency band, and the other is called a partial multiplexing frequency band. The second condition refers to that the frequency range overlap of the two frequency bands is ≥ 90%, and the combination of the power amplifier and the filter in the transmit chain of the two frequency bands is the same, and the combination of the low-noise amplifier and the filter in the receive chain of the two frequency bands is the same, but the topology of the radio frequency switch matrix of the two frequency bands is different.

[0032] wherein the radio frequency switch matrix is a device that enables the routing of radio frequency signals through selectable paths. In the above two cases, the anchor frequency band is determined so that the total number of anchor frequency bands is as small as possible.

[0033] In addition to the full multiplexing frequency band and the partial multiplexing frequency band, all LTE single-carrier frequency bands and NR single-carrier frequency bands supported by the 5G NR mobile terminal are called reference frequency bands. The reference frequency band completely contains all anchor frequency bands.

[0034] Step S3: Perform a complete calibration process for each reference frequency band to obtain calibration data for each reference frequency band, and save the frequency band index and calibration data of each reference frequency band in the NVM. This is called full calibration mode (Full Cal).

[0035] Step S4: Do not perform calibration for each full multiplexing frequency band, find the corresponding anchor frequency band of each full multiplexing frequency band, and only save the frequency band index of each full multiplexing frequency band and the frequency band index of the corresponding anchor frequency band in the NVM, thereby multiplexing the calibration data of the corresponding anchor frequency band. This is called data multiplexing mode (No Cal). Since the calibration data of the corresponding anchor frequency band of each full multiplexing frequency band is not saved repeatedly, the storage space required for the calibration data is reduced.

[0036] For each partial multiplexing frequency band, find the corresponding anchor frequency band of each partial multiplexing frequency band, perform a single-point calibration process for each incremental power point between each partial multiplexing frequency band and the corresponding anchor frequency band due to the difference in the topology of the radio frequency switch matrix, to obtain one or more single-point calibration data; save the frequency band index of each partial multiplexing frequency band and the frequency band index of the corresponding anchor frequency band, as well as the single-point calibration data of all incremental power points, in the NVM, thereby multiplexing the calibration data of the corresponding anchor frequency band. This is called delta calibration mode (Delta Cal). Since the calibration data of the corresponding anchor frequency band of each partial multiplexing frequency band is not saved repeatedly, the storage space required for the calibration data is reduced.

[0037] Step S5: For each single LTE frequency band supported by the 5G NR mobile terminal for LTE intra-band carrier aggregation and each LTE single-carrier frequency band supported by the 5G NR mobile terminal, determine whether the first condition or the second condition is met. If the first condition is met, the data multiplexing mode is used for processing. If the second condition is met, the incremental calibration mode is used for processing. If neither the first condition nor the second condition is met, the full calibration mode is used for processing.

[0038] For each single NR frequency band supported by the 5G NR mobile terminal for NR intra-band carrier aggregation and each NR single-carrier frequency band supported by the 5G NR mobile terminal, determine whether the first condition or the second condition is met. If the first condition is met, the data multiplexing mode is used for processing. If the second condition is met, the incremental calibration mode is used for processing. If neither the first condition nor the second condition is met, the full calibration mode is used for processing.

[0039] For each LTE frequency band in each combination of multiple LTE frequency bands supported by the 5G NR mobile terminal for LTE inter-band carrier aggregation, and for each LTE single-carrier frequency band supported by the 5G NR mobile terminal, determine whether the first condition or the second condition is met. If the first condition is met, the data multiplexing mode is used for processing. If the second condition is met, the incremental calibration mode is used for processing. If neither the first condition nor the second condition is met, the full calibration mode is used for processing.

[0040] For each NR frequency band in each combination of multiple NR frequency bands supported by the 5G NR mobile terminal for inter-band carrier aggregation, and for each NR single-carrier frequency band supported by the 5G NR mobile terminal, determine whether the first condition or the second condition is met. If the first condition is met, the data multiplexing mode is used for processing. If the second condition is met, the incremental calibration mode is used for processing. If neither the first condition nor the second condition is met, the full calibration mode is used for processing.

[0041] In actual scenarios, it is more likely that the first or second condition is met between the frequency band of intra-band carrier aggregation and the single carrier frequency band, and it is more likely that the first or second condition is met between the main carrier frequency band of inter-band carrier aggregation and the single carrier frequency band, and it is less likely that the first or second condition is met between the secondary carrier frequency band of inter-band carrier aggregation and the single carrier frequency band.

[0042] Step S6: The frequency band combination of E-UTRA-NR dual connectivity supported by the 5G NR mobile terminal can be regarded as a combination of one or more LTE frequency bands and one or more NR frequency bands.

[0043] For each LTE frequency band in the LTE and NR frequency band combination, and for each LTE single-carrier frequency band supported by the 5G NR mobile terminal, determine whether the first or second condition is met. If the first condition is met, process the call using the data multiplexing mode. If the second condition is met, process the call using the incremental calibration mode. If neither the first nor the second condition is met, process the call using the full calibration mode.

[0044] For each NR band in the LTE and NR band combination, and each NR single-carrier band supported by the 5G NR mobile terminal, determine whether the first or second condition is met. If the first condition is met, use the data multiplexing mode for processing. If the second condition is met, use the incremental calibration mode for processing. If neither the first nor the second condition is met, use the full calibration mode for processing.

[0045] In actual scenarios, it is unlikely that the first or second condition is met between the E-UTRA-NR dual-connectivity frequency band and the single-carrier frequency band.

[0046] There is no strict order restriction between step S5 and step S6, and they can be performed either before or at the same time.

[0047] Optionally, during or after the execution of step S4, step S5, and step S6, the method further includes step S7: establishing a reusable frequency band relationship matrix, wherein the matrix records the reusability relationship between each frequency band and frequency band combination supported by the 5G NR mobile terminal and the single carrier frequency band. If no reusability relationship exists, no record is made. The contents of the operation record include: (1) the reuse relationship between each fully reused frequency band and the reference frequency band, (2) the reuse relationship between each partially reused frequency band and the reference frequency band, (3) the reuse relationship between a single LTE frequency band of LTE intra-band carrier aggregation and a LTE single-carrier frequency band, (4) the reuse relationship between a single NR frequency band of NR intra-band carrier aggregation and a NR single-carrier frequency band, (5) the reuse relationship between a combination of multiple LTE frequency bands of LTE inter-band carrier aggregation and a LTE single-carrier frequency band, (6) the reuse relationship between a combination of multiple NR frequency bands of NR inter-band carrier aggregation and a NR single-carrier frequency band, (7) the reuse relationship between a combination of LTE and NR frequency bands of E-UTRA-NR dual connectivity and a LTE single-carrier frequency band, and (8) the reuse relationship between a combination of LTE and NR frequency bands of E-UTRA-NR dual connectivity and a NR single-carrier frequency band. Among them, (1) and (2) belong to the reuse relationship between single carrier frequency bands, (3) and (4) belong to the reuse relationship between a single frequency band of intra-band carrier aggregation and a single carrier frequency band, (5) and (6) belong to the reuse relationship between a combination of multiple frequency bands of inter-band carrier aggregation and a single carrier frequency band, and (7) and (8) belong to the reuse relationship between a combination of multiple frequency bands of E-UTRA-NR dual connectivity and a single carrier frequency band.

[0048] The following uses a specific 5G NR mobile terminal RF parameter calibration project as an example to illustrate the difference between the existing technology and this application. Table 3 lists the number of frequency bands supported by the 5G NR mobile terminal in this calibration project.

[0049] Radio Access Technology (RAT) Mode Single carrier / primary component carrier (PCC) Secondary Component Carrier (SCC) LTE single carrier 14 0 LTE carrier aggregation 27 27 NR single carrier 12 0 NR carrier aggregation 17 17 E-UTRA-NR Dual Connectivity 11 11 total 81 55

[0050] Table 3

[0051] If the existing radio frequency parameter calibration method is used, a complete calibration mode needs to be adopted in all 136 frequency bands, and the calibration data of all 136 frequency bands needs to be saved in the NVM.

[0052] If the RF parameter calibration method of the present application is adopted, it is assumed that the present application only has a full calibration mode and a data multiplexing mode, and no incremental calibration mode. All incremental calibration modes are changed to full calibration mode. This extreme scenario actually deteriorates the performance of the present application, but is more convenient for calculation. The present application only needs to adopt a full calibration mode for 47 key frequency bands and a data multiplexing mode for 89 derivative frequency bands. The number of frequency bands using the full calibration mode in the present application is reduced from 136 to 47, a reduction of 65%. Assuming that the volume of the calibration data for each frequency band using the full calibration mode is 1KB, the storage space occupied by all calibration data of the present application is reduced from 136KB to 47KB, saving 89KB of storage space. The retrieval speed of the present application for finding RF parameters that need to be compensated in all calibration data is increased by 2.9 times, and the query time is reduced by 72%.

[0053] See also Figure 2 The RF parameter calibration system for a 5G NR mobile terminal proposed in this application includes a frequency band index setting unit 1, a single carrier frequency band classification unit 2, a reference frequency band calibration unit 3, a single carrier frequency band multiplexing unit 4, a carrier aggregation frequency band and frequency band combination processing unit 5, and a dual connection frequency band combination processing unit 6. Figure 2 The system shown corresponds to Figure 1 The method shown.

[0054] The frequency band index setting unit 1 is used to set unique, non-overlapping frequency band indexes for all frequency bands and frequency band combinations supported by the 5G NR mobile terminal.

[0055] The single-carrier frequency band classification unit 2 is used to classify all LTE single-carrier frequency bands and NR single-carrier frequency bands supported by the 5G NR mobile terminal into three categories: fully reused frequency bands, partially reused frequency bands, and reference frequency bands. When a certain LTE single-carrier frequency band and a certain NR single-carrier frequency band supported by the 5G NR mobile terminal meet the first condition, one of the frequency bands is called the anchor frequency band, and the other frequency band is called the fully reused frequency band. The first condition means that the frequency range overlap of the two frequency bands is ≥90%, and the combination of power amplifiers and filters in the transmit links of the two frequency bands is the same, and the combination of low-noise amplifiers and filters in the receive links of the two frequency bands is the same, and the topology of the RF switch matrices of the two frequency bands is consistent. When a certain LTE single-carrier frequency band and a certain NR single-carrier frequency band supported by the 5G NR mobile terminal meet the second condition, one of the frequency bands is called the anchor frequency band, and the other frequency band is called the partially reused frequency band. The second condition means that the frequency range overlap of the two bands is ≥ 90%, the power amplifier and filter combinations in the transmit chains of the two bands are the same, and the low-noise amplifier and filter combinations in the receive chains of the two bands are the same, but the topologies of the RF switch matrices of the two bands are different. All LTE single-carrier bands and NR single-carrier bands supported by 5G NR mobile terminals, except for fully reused bands and partially reused bands, are referred to as reference bands.

[0056] The reference frequency band calibration unit 3 is used to perform a complete calibration process for each reference frequency band, obtain calibration data for each reference frequency band, and save the frequency band index and calibration data of each reference frequency band in the NVM. This is the complete calibration mode.

[0057] The single-carrier frequency band multiplexing unit 4 is used to multiplex the calibration data of the corresponding anchor frequency band for each fully multiplexed frequency band, and only save the frequency band index of each fully multiplexed frequency band and the frequency band index of the corresponding anchor frequency band in the NVM. This is the data multiplexing mode. The single-carrier frequency band multiplexing unit 4 is also used to multiplex the calibration data of the corresponding anchor frequency band for each partially multiplexed frequency band, and to perform a single-point calibration process on each incremental power point caused by the different topology of the RF switch matrix between each partially multiplexed frequency band and the corresponding anchor frequency band to obtain one or more single-point calibration data; the frequency band index of each partially multiplexed frequency band, the frequency band index of the corresponding anchor frequency band, and the single-point calibration data of all incremental power points are saved in the NVM. This is the incremental calibration mode.

[0058] The carrier aggregation frequency band and frequency band combination processing unit 5 is configured to determine whether the first condition or the second condition is met for each LTE intra-band carrier aggregation frequency band supported by the 5G NR mobile terminal, each LTE single carrier frequency band supported by the 5G NR mobile terminal, each NR intra-band carrier aggregation frequency band supported by the 5G NR mobile terminal, each NR single carrier frequency band supported by the 5G NR mobile terminal, each LTE frequency band in the LTE frequency band combination, and each NR frequency band in the NR frequency band combination. If the first condition is met, the data multiplexing mode is used for processing. If the second condition is met, the incremental calibration mode is used for processing. If neither the first condition nor the second condition is met, the complete calibration mode is used for processing.

[0059] The dual connectivity frequency band combination processing unit 6 is configured to determine whether the first condition or the second condition is met for each LTE frequency band in the frequency band combination of the E-UTRA-NR dual connectivity supported by the 5G NR mobile terminal, each LTE single carrier frequency band supported by the 5G NR mobile terminal, each NR frequency band in the frequency band combination of the E-UTRA-NR dual connectivity supported by the 5G NR mobile terminal, and each NR single carrier frequency band supported by the 5G NR mobile terminal. If the first condition is met, the data multiplexing mode is used for processing. If the second condition is met, the incremental calibration mode is used for processing. If neither the first condition nor the second condition is met, the complete calibration mode is used for processing.

[0060] All frequency bands and frequency band combinations supported by 5G NR mobile terminals are roughly divided into three parts: the first part is single-carrier frequency bands, the second part is a single frequency band for intra-band carrier aggregation, and the third part is a combination of multiple frequency bands for inter-band carrier aggregation and E-UTRA-NR dual connectivity. For the first part, this application divides all single-carrier frequency bands into three categories: only perform a full calibration mode on the reference frequency band and save all calibration data; no calibration is performed on the fully multiplexed frequency band, and only the frequency band index of the corresponding reference frequency band is saved; only perform a single-point calibration on the partially multiplexed frequency band, and only the frequency band index and single-point calibration data of the corresponding reference frequency band are saved. For the second part, this application compares a single frequency band for intra-band carrier aggregation with all single-carrier frequency bands, and when the first condition or the second condition is met, adopts the data multiplexing mode or the incremental calibration mode. For the second part, this application compares each frequency band in the frequency band combination with all single-carrier frequency bands, and when the first condition or the second condition is met, adopts the data multiplexing mode or the incremental calibration mode. Obviously, this application reduces the RF calibration time of the 5G NR mobile terminal in data multiplexing mode or incremental calibration mode, reduces the overall calibration data volume, and reduces the storage space required for the overall calibration data. It also reduces the query time for finding the RF parameters that need to be compensated in the overall calibration data, thereby improving the query efficiency.

[0061] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A method for calibrating radio frequency parameters of a 5G NR mobile terminal, characterized in that: The method includes the following steps: Step S1: setting non-overlapping frequency band indexes for all frequency bands and frequency band combinations supported by the 5G NR mobile terminal; Step S2: Divide all single-carrier frequency bands into three categories: reference frequency band, fully reused frequency band, and partially reused frequency band; If two single-carrier frequency bands meet the first condition, one of the frequency bands is called the anchor frequency band and the other frequency band is called the fully reused frequency band; the first condition means that the frequency range overlap of the two frequency bands is ≥ 90%, the power amplifier and filter combination in the transmit chain of the two frequency bands is the same, the low-noise amplifier and filter combination in the receive chain of the two frequency bands is the same, and the topology of the RF switch matrix of the two frequency bands is consistent; If two single-carrier frequency bands meet the second condition, one of the frequency bands is called the anchor frequency band and the other is called the partially reused frequency band. The second condition means that the frequency range overlap of the two frequency bands is ≥ 90%, the power amplifier and filter combination in the transmit chain of the two frequency bands is the same, and the low-noise amplifier and filter combination in the receive chain of the two frequency bands is the same, but the topology of the RF switch matrix of the two frequency bands is different. All single-carrier frequency bands except fully reused frequency bands and partially reused frequency bands are reference frequency bands; Step S3: Perform a complete calibration process for each reference frequency band to obtain calibration data for each reference frequency band, and save the frequency band index and calibration data of each reference frequency band; this is the complete calibration mode; Step S4: No calibration operation is performed on each fully reused frequency band. Only the frequency band index of each fully reused frequency band and the frequency band index of the corresponding anchor frequency band are saved, thereby reusing the calibration data of the corresponding anchor frequency band. This is the data reuse mode. A single-point calibration process is performed on each incremental power point caused by the different topology of the RF switch matrix between each partially reused frequency band and the corresponding anchor frequency band to obtain one or more single-point calibration data; the frequency band index of each partially reused frequency band, the frequency band index of the corresponding anchor frequency band, and the single-point calibration data of all incremental power points are saved, thereby reusing the calibration data of the corresponding anchor frequency band; this is the incremental calibration mode; Step S5: Determine whether the first condition or the second condition is satisfied between each single frequency band of intra-band carrier aggregation and the single carrier frequency band, and also determine whether the first condition or the second condition is satisfied between each frequency band in the combination of multiple frequency bands of inter-band carrier aggregation and the single carrier frequency band; if the first condition is satisfied, adopt the data multiplexing mode; if the second condition is satisfied, adopt the incremental calibration mode; otherwise, adopt the full calibration mode; Step S6: Determine whether each frequency band in the combination of multiple frequency bands of E-UTRA-NR dual connectivity and the single carrier frequency band meets the first condition or the second condition; if the first condition is met, adopt the data multiplexing mode; if the second condition is met, adopt the incremental calibration mode; otherwise, adopt the full calibration mode; The step S5 and step S6 may be performed either before or simultaneously.

2. The radio frequency parameter calibration method for a 5G NR mobile terminal according to claim 1, wherein: In step S1, all frequency bands and frequency band combinations supported by the 5G NR mobile terminal include: a single carrier frequency band, a single frequency band of intra-band carrier aggregation, an inter-band carrier aggregation and a combination of multiple frequency bands of E-UTRA-NR dual connectivity.

3. The radio frequency parameter calibration method for a 5G NR mobile terminal according to claim 2, wherein: In step S1, if the frequency ranges of two frequency bands are completely or partially the same, different frequency band indexes are set respectively; if the frequency ranges of two frequency band combinations are completely or partially the same, different frequency band indexes are set respectively.

4. The radio frequency parameter calibration method for a 5G NR mobile terminal according to claim 1, wherein: In step S2, when determining the anchor frequency bands, the total number of anchor frequency bands is made as small as possible.

5. The radio frequency parameter calibration method for a 5G NR mobile terminal according to claim 1, wherein: In step S2, the reference frequency band completely includes all anchor frequency bands.

6. The radio frequency parameter calibration method for a 5G NR mobile terminal according to claim 1, wherein: During or after the execution of steps S4, S5, and S6, step S7 is also included: establishing a reusable frequency band relationship matrix, which records the multiplexing relationship between each frequency band and frequency band combination supported by the 5G NR mobile terminal and the single carrier frequency band.

7. The radio frequency parameter calibration method for a 5G NR mobile terminal according to claim 6, wherein: In step S7, the recorded content includes: the multiplexing relationship between single carrier frequency bands, the multiplexing relationship between a single frequency band of intra-band carrier aggregation and a single carrier frequency band, the multiplexing relationship between a combination of multiple frequency bands of inter-band carrier aggregation and a single carrier frequency band, and the multiplexing relationship between a combination of multiple frequency bands of E-UTRA-NR dual connectivity and a single carrier frequency band.

8. A radio frequency parameter calibration system for a 5G NR mobile terminal, characterized in that: It includes a frequency band index setting unit, a single carrier frequency band classification unit, a reference frequency band calibration unit, a single carrier frequency band multiplexing unit, a carrier aggregation frequency band and frequency band combination processing unit, and a dual connection frequency band combination processing unit; The frequency band index setting unit is used to set non-overlapping frequency band indexes for all frequency bands and frequency band combinations supported by the 5G NR mobile terminal; The single-carrier frequency band classification unit is used to classify all single-carrier frequency bands into three categories: fully reused frequency bands, partially reused frequency bands, and reference frequency bands. When two single-carrier frequency bands meet the first condition, one of the frequency bands is called an anchor frequency band and the other frequency band is called a fully reused frequency band. The first condition is that the frequency range overlap of the two frequency bands is ≥90%, the combination of power amplifiers and filters in the transmit chains of the two frequency bands is the same, the combination of low-noise amplifiers and filters in the receive chains of the two frequency bands is the same, and the topology of the radio frequency switch matrices of the two frequency bands is consistent. When two single-carrier frequency bands meet the second condition, one of the frequency bands is called an anchor frequency band and the other frequency band is called a partially reused frequency band. The second condition is that the frequency range overlap of the two frequency bands is ≥90%, the combination of power amplifiers and filters in the transmit chains of the two frequency bands is the same, the combination of low-noise amplifiers and filters in the receive chains of the two frequency bands is the same, but the topology of the radio frequency switch matrices of the two frequency bands is different. Among all single-carrier frequency bands, frequency bands other than the fully reused frequency band and the partially reused frequency band are reference frequency bands. The reference frequency band calibration unit is used to perform a complete calibration process for each reference frequency band, obtain calibration data for each reference frequency band, and save the frequency band index and calibration data of each reference frequency band in the NVM; this is the complete calibration mode; The single-carrier frequency band multiplexing unit is used to not perform a calibration operation on each fully multiplexed frequency band, and only save the frequency band index of each fully multiplexed frequency band and the frequency band index of the corresponding anchor frequency band; this is a data multiplexing mode; the single-carrier frequency band multiplexing unit is further used to perform a single-point calibration process on each incremental power point caused by the different topology of the radio frequency switch matrix between each partially multiplexed frequency band and the corresponding anchor frequency band, to obtain one or more single-point calibration data; save the frequency band index of each partially multiplexed frequency band, the frequency band index of the corresponding anchor frequency band, and the single-point calibration data of all incremental power points; this is an incremental calibration mode; The carrier aggregation frequency band and frequency band combination processing unit is used to determine whether the first condition or the second condition is met between each single frequency band of intra-band carrier aggregation and the single carrier frequency band, and is also used to determine whether the first condition or the second condition is met between each frequency band in the combination of multiple frequency bands of inter-band carrier aggregation and the single carrier frequency band; if the first condition is met, the data multiplexing mode is adopted; if the second condition is met, the incremental calibration mode is adopted; otherwise, the full calibration mode is adopted; The dual-connection frequency band combination processing unit is used to determine whether each frequency band in the combination of multiple frequency bands of the E-UTRA-NR dual connection and the single carrier frequency band meets the first condition or the second condition; if the first condition is met, the data multiplexing mode is adopted; if the second condition is met, the incremental calibration mode is adopted; otherwise, the complete calibration mode is adopted.

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