RSRP compensation method, device and user equipment

Abstract

The present invention provides a method, device and user equipment for compensating RSRP. The method comprises: setting a signal source to transmit a modulated signal, the signal strength makes the device work in a linear region, keeping the signal strength unchanged, and injecting it out through the antenna port; for different dimensions, arbitrarily selecting a dimension, and traversing the positions of different resource blocks to obtain the corresponding first received signal strength indication RSSI value; setting a signal source to transmit a single-tone signal, the frequency is set to a predetermined value of the local oscillation to the right, and the signal strength is consistent with the signal strength of the modulated signal transmitted by the signal source, and obtaining a second RSSI value of the single-tone signal; subtracting the first RSSI value from the second RSSI value to obtain a compensation value of the reference signal received power RSRP; for each dimension, repeating the above steps to obtain multiple compensation values. The present invention can accurately compensate for RSRP measured by SSB.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to an RSRP compensation method, device and user equipment. Background Art

[0002] In NR (New Radio), the downlink needs to support 100M signal bandwidth. Due to the influence of the RF front-end and filter, the frequency response at the 100M sideband will be several db lower than the mid-channel amplitude.

[0003] Since the signal position of SSB (Synchronization Signal Block) in NR is not fixed, if the SSB is located at the sideband, the RSRP (Reference Signal Receiving Power) estimated by SSB will deviate from the actual signal strength.

[0004] Taking SSB with a subcarrier bandwidth of 30KHz as an example, the total bandwidth is 7.2MHz, but the NR cell is generally 100MHz. Due to the existence of frequency, the measurement results using 7.2MHz bandwidth may not accurately reflect the overall situation of 100MHz bandwidth.

[0005] In order to solve the problem of inaccurate RSRP measurement by SSB, the prior art adopts a solution of software-written dead compensation value. However, due to the differences in frequency responses of different low-noise amplifier gears and different channels, this solution cannot completely solve the existing problem. Summary of the invention

[0006] The RSRP compensation method, device and user equipment provided by the present invention can accurately compensate the RSRP measured by SSB.

[0007] In a first aspect, the present invention provides a method for compensating RSRP, the method comprising:

[0008] Set the signal source to transmit the modulated signal. The signal strength makes the device work in the linear region. Keep the signal strength unchanged and inject it through the antenna port.

[0009] For different dimensions, one dimension is arbitrarily selected, and the corresponding first received signal strength indication RSSI value is obtained by traversing the positions of different resource blocks;

[0010] Set the signal source to transmit a single-tone signal, set the frequency to the local oscillator to the right by a predetermined value, and keep the signal strength consistent with the signal strength of the modulated signal transmitted by the signal source to obtain a second RSSI value of the single-tone signal;

[0011] Subtract the first RSSI value from the second RSSI value to obtain a compensation value of reference signal received power RSRP;

[0012] For each dimension, the above steps are repeated to obtain multiple compensation values.

[0013] Optionally, the method further comprises:

[0014] fitting the plurality of compensation values ​​into a quadratic curve;

[0015] The coefficients of the polynomial corresponding to the quadratic curve are stored in the non-volatile memory NV.

[0016] Optionally, the bandwidth of the modulated signal emitted by the signal source is 20RB;

[0017] The traversing of the positions of different resource blocks specifically includes: traversing the positions of different resource blocks at an interval of 20 RB each time.

[0018] Optionally, the different dimensions include one or more of different gain control words, different low noise amplifier gears, different channels, different frequency bands, different SSB positions, different bandwidths and different receiving paths.

[0019] In a second aspect, the present invention provides an RSRP compensation device, the device comprising:

[0020] A setting unit is used to set the signal source to transmit a modulated signal, and the signal strength makes the device work in a linear region, keeps the signal strength unchanged, and injects it through the antenna port;

[0021] A first acquisition unit is used to arbitrarily select a dimension for different dimensions, and obtain a corresponding first received signal strength indication RSSI value by traversing positions of different resource blocks;

[0022] A second acquisition unit is used to set a signal source to transmit a single-tone signal, the frequency is set to be a predetermined value of the local oscillation to the right, the signal strength is consistent with the signal strength of the modulated signal transmitted by the signal source, and a second RSSI value of the single-tone signal is obtained;

[0023] The calculation unit is used to obtain a compensation value of reference signal received power RSRP by subtracting the first RSSI value from the second RSSI value.

[0024] Optionally, the device further comprises:

[0025] A processing unit, configured to fit the plurality of compensation values ​​into a quadratic curve;

[0026] The storage unit is used to store the coefficients of the polynomial corresponding to the quadratic curve in a non-volatile memory NV.

[0027] Optionally, the bandwidth of the modulated signal emitted by the signal source is 20RB;

[0028] The traversing of the positions of different resource blocks specifically includes: traversing the positions of different resource blocks at an interval of 20 RB each time.

[0029] Optionally, the different dimensions include one or more of different gain control words, different low noise amplifier gears, different channels, different frequency bands, different SSB positions, different bandwidths and different receiving paths.

[0030] In a third aspect, the present invention provides a user equipment, the user equipment comprising:

[0031] at least one processor; and

[0032] a memory communicatively connected to the at least one processor; wherein,

[0033] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can perform the above-mentioned RSRP compensation method.

[0034] In a fourth aspect, the present invention provides a chip, comprising:

[0035] at least one processor; and

[0036] a memory communicatively connected to the at least one processor; wherein,

[0037] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can perform the above-mentioned RSRP compensation method.

[0038] In a fifth aspect, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the above-mentioned RSRP compensation method is implemented.

[0039] The RSRP compensation method, device and user equipment provided in the embodiments of the present invention comprehensively consider different gain control words, different low noise amplifier gears, different channels, different frequency bands, different SSB positions, different bandwidths and different receiving paths, and calibrate the RSRP measured by SSB. After calibration, accurate compensation effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Flow chart of a method for compensating RSRP according to an embodiment of the present invention;

[0041] Figure 2 is a flow chart of a method for compensating RSRP according to another embodiment of the present invention;

[0042] Figure 3 A curve graph obtained by performing polynomial fitting on multiple compensation values ​​provided by an embodiment of the present invention;

[0043] Figure 4 It is a structural schematic diagram of an RSRP compensation device according to an embodiment of the present invention;

[0044] Figure 5 FIG. 4 is a schematic diagram of the structure of an RSRP compensation device according to another embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] An embodiment of the present invention provides a method for compensating RSRP, the method being applied to a user equipment, such as Figure 1 As shown, the method includes:

[0047] S11. Set the signal source to transmit a modulated signal with a signal strength that makes the device work in a linear region, keep the signal strength constant, and inject it out through the antenna port.

[0048] S12. For different dimensions, arbitrarily select one dimension, and obtain a corresponding first received signal strength indication RSSI value by traversing positions of different resource blocks.

[0049] S13, setting a signal source to transmit a single-tone signal, setting the frequency of the local oscillator to the right by a predetermined value, and keeping the signal strength consistent with the signal strength of the modulated signal transmitted by the signal source, to obtain a second RSSI (Received Signal Strength Indication) value of the single-tone signal.

[0050] S14. Subtract the first RSSI value from the second RSSI value to obtain a compensation value of reference signal received power RSRP.

[0051] For each dimension, the above steps S12 to S14 are repeatedly performed to obtain multiple compensation values.

[0052] The RSRP compensation method provided in the embodiment of the present invention comprehensively considers different gain control words, different low noise amplifier gears, different channels, different frequency bands, different SSB positions, different bandwidths and different receiving paths, and calibrates the RSRP measured by SSB. After calibration, an accurate compensation effect can be achieved.

[0053] The RSRP compensation method of the present invention is described in detail below with reference to specific embodiments.

[0054] In this embodiment, an AGC (Automatic Gain Control) calibration result is simulated by externally injecting a single tone signal, and the frequency of the single tone signal is the downlink local oscillator frequency plus freoffset (frequency offset), where freoffset=1Mhz.

[0055] In order to simulate the difference between different SSB positions and calibration results, for example, 100M bandwidth, SCS (carrier spacing) is 30K, and the signal source sets the number of resource blocks to 20. Traverse the resource block compensation value and calculate the difference between the signal capability and calibration signal strength at different SSB positions. Scan high, medium and low channels in each frequency band, and select compensation parameters for all channels in the frequency band. The latitudes that need to be covered are: different gain control words, different low noise amplifier gears, different channels, different frequency bands, different SSB positions, different bandwidths (needed for parts above 50M) and different receiving paths.

[0056] like Figure 2 As shown, the RSRP compensation method provided by the embodiment of the present invention includes:

[0057] S21. Set the signal source to transmit a modulated signal with a signal strength that makes the device work in a linear region, keep the signal strength constant, and inject it out through the antenna port.

[0058] The bandwidth of the modulated signal transmitted by the signal source is 20 RBs (resource blocks, 12 consecutive subcarriers in frequency and one time slot in time domain, referred to as 1 RB).

[0059] S22. For different dimensions, arbitrarily select one dimension, and obtain a corresponding first RSSI value by traversing the positions of different resource blocks.

[0060] Specifically, a frequency band, a gain control word, and a channel are selected, and the corresponding RSSI value is obtained by traversing the positions of different resource blocks (each time at an interval of 20 RB). Due to the frequency response of the RF front end and the filter, the RSSI at the sideband is lower than the RSSI in the middle band (some results in Table 1 also confirm this), which is why RSRP will be inaccurate if SSB falls on the sideband.

[0061] S23, setting the signal source to transmit a single-tone signal, setting the frequency to a predetermined value that the local oscillator is deviated to the right, and keeping the signal strength consistent with the signal strength of the modulated signal transmitted by the signal source, to obtain a second RSSI value of the single-tone signal.

[0062] Optionally, the frequency can be set to 1MHz to the right of the local oscillator.

[0063] S24. Subtract the first RSSI value obtained in step S22 from the second RSSI value obtained in step S23 to obtain a compensation value of RSRP.

[0064] For different frequency bands, different receiving paths, different channels, and different gain control words, steps S22-S24 are repeated to obtain data as shown in Table 1:

[0065] Table 1

[0066] S25. Fit the multiple compensation values ​​into a quadratic curve.

[0067] S26. Store the coefficients of the polynomial corresponding to the quadratic curve in a non-volatile memory NV.

[0068] Since the amount of data is too large, if all of it is written in the NV (non-volatile memory) used to store control information and compensated by table lookup, it will increase the huge overhead of NV space. Figure 3 As shown, the compensation values ​​corresponding to different resource block compensation locations are fitted into a quadratic curve, where: Figure 3 The horizontal coordinate of the quadratic curve is the RB offset, and the vertical coordinate is the compensation value. The error caused by this is only about plus or minus 0.5db. The coefficients of the polynomial corresponding to the obtained quadratic curve are stored in NV for baseband call, which can greatly save NV storage space.

[0069] Table 2

[0070]

[0071] The RSRP compensation method provided by the embodiment of the present invention comprehensively considers different gain control words, different low noise amplifier gears, different channels, different frequency bands, different SSB positions, different bandwidths and different receiving paths, and calibrates the RSRP measured by SSB. After calibration, an accurate compensation effect can be achieved; in addition, the compensation values ​​corresponding to the compensation positions of different resource blocks are fitted into a quadratic curve, and the coefficients of the polynomial corresponding to the obtained quadratic curve are stored in a non-volatile memory for baseband call, thereby greatly saving the storage space of the non-volatile memory.

[0072] The embodiment of the present invention also provides a RSRP compensation device, the device is located in the user equipment, such as Figure 4 As shown, the device comprises:

[0073] The setting unit 11 is used to set the signal source to transmit a modulated signal, the signal strength of which makes the device work in a linear region, keeps the signal strength unchanged, and injects it out through the antenna port;

[0074] A first acquisition unit 12 is used to arbitrarily select a dimension for different dimensions and obtain a corresponding first received signal strength indication RSSI value by traversing positions of different resource blocks;

[0075] The second acquisition unit 13 is used to set the signal source to transmit a single-tone signal, the frequency is set to be a predetermined value of the local oscillation rightward, the signal strength is consistent with the signal strength of the modulated signal transmitted by the signal source, and a second RSSI value of the single-tone signal is obtained;

[0076] The calculation unit 14 is used to obtain a compensation value of reference signal received power RSRP by subtracting the first RSSI value from the second RSSI value.

[0077] The RSRP compensation device provided in the embodiment of the present invention comprehensively considers different gain control words, different low noise amplifier gears, different channels, different frequency bands, different SSB positions, different bandwidths and different receiving paths, and calibrates the RSRP measured by SSB. After calibration, an accurate compensation effect can be achieved.

[0078] Furthermore, if Figure 5 As shown, the device also includes:

[0079] A processing unit 15, configured to fit the multiple compensation values ​​into a quadratic curve;

[0080] The storage unit 16 is used to store the coefficients of the polynomial corresponding to the quadratic curve in a non-volatile memory NV.

[0081] Optionally, the bandwidth of the modulated signal emitted by the signal source is 20RB;

[0082] The traversing of the positions of different resource blocks specifically includes: traversing the positions of different resource blocks at an interval of 20 RB each time.

[0083] Optionally, the different dimensions include one or more of different gain control words, different low noise amplifier gears, different channels, different frequency bands, different SSB positions, different bandwidths and different receiving paths.

[0084] The device of this embodiment can be used to execute the technical solution of the above method embodiment. Its implementation principle and technical effect are similar and will not be repeated here.

[0085] An embodiment of the present invention further provides a user equipment, the user equipment comprising:

[0086] at least one processor; and

[0087] a memory communicatively connected to the at least one processor; wherein,

[0088] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can perform the above-mentioned RSRP compensation method.

[0089] An embodiment of the present invention further provides a chip, comprising:

[0090] at least one processor; and

[0091] a memory communicatively connected to the at least one processor; wherein,

[0092] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can perform the above-mentioned RSRP compensation method.

[0093] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the above-mentioned RSRP compensation method is implemented.

[0094] Those skilled in the art can understand that all or part of the processes in the above method embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes in the above method embodiments. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0095] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for compensating RSRP, characterized in that: The method comprises: Set the signal source to transmit the modulated signal. The signal strength makes the device work in the linear region. Keep the signal strength unchanged and inject it through the antenna port. For different dimensions, arbitrarily select a dimension, and obtain the corresponding first received signal strength indication RSSI value by traversing the positions of different resource blocks; wherein the different dimensions include one or more of different gain control words, different low noise amplifier gears, different channels, different frequency bands, different SSB positions, different bandwidths, and different receiving paths; Set the signal source to transmit a single-tone signal, set the frequency to the local oscillator to the right by a predetermined value, and keep the signal strength consistent with the signal strength of the modulated signal transmitted by the signal source to obtain a second RSSI value of the single-tone signal; Subtract the first RSSI value from the second RSSI value to obtain a compensation value of reference signal received power RSRP; For each dimension, the above steps are repeated to obtain multiple compensation values.

2. The method according to claim 1, characterized in that The method further comprises: fitting the plurality of compensation values ​​into a quadratic curve; The coefficients of the polynomial corresponding to the quadratic curve are stored in the non-volatile memory NV.

3. The method according to claim 1 or 2, characterized in that: The bandwidth of the modulated signal emitted by the signal source is 20RB; The traversing of the positions of different resource blocks specifically includes: traversing the positions of different resource blocks at an interval of 20 RB each time.

4. A RSRP compensation device, characterized in that: The device comprises: A setting unit is used to set the signal source to transmit a modulated signal, and the signal strength makes the device work in a linear region, keeps the signal strength unchanged, and injects it through the antenna port; A first acquisition unit is used to arbitrarily select a dimension for different dimensions, and obtain a corresponding first received signal strength indication RSSI value by traversing the positions of different resource blocks; wherein the different dimensions include one or more of different gain control words, different low noise amplifier gears, different channels, different frequency bands, different SSB positions, different bandwidths, and different receiving paths; A second acquisition unit is used to set a signal source to transmit a single-tone signal, the frequency is set to be a predetermined value of the local oscillation to the right, the signal strength is consistent with the signal strength of the modulated signal transmitted by the signal source, and a second RSSI value of the single-tone signal is obtained; a calculation unit, configured to obtain a compensation value of a reference signal received power RSRP by subtracting the first RSSI value from the second RSSI value; For each dimension, the first acquisition unit, the second acquisition unit, and the calculation unit repeatedly perform corresponding actions to obtain multiple compensation values.

5. The device according to claim 4, characterized in that The device also includes: A processing unit, configured to fit the plurality of compensation values ​​into a quadratic curve; The storage unit is used to store the coefficients of the polynomial corresponding to the quadratic curve in a non-volatile memory NV.

6. The device according to claim 4 or 5, characterized in that The bandwidth of the modulated signal emitted by the signal source is 20RB; The traversing of the positions of different resource blocks specifically includes: traversing the positions of different resource blocks at an interval of 20 RB each time.

7. A user equipment, characterized in that: The user equipment comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 3.

8. A chip, characterized in that: The chip comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 3.

9. A chip module, characterized in that: The chip module comprises the chip according to claim 8.

10. A computer-readable storage medium, wherein: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the method according to any one of claims 1 to 3 is implemented.

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