CN114520698A - RSRP compensation method and device and user equipment - Google Patents
RSRP compensation method and device and user equipment Download PDFInfo
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- CN114520698A CN114520698A CN202210139812.9A CN202210139812A CN114520698A CN 114520698 A CN114520698 A CN 114520698A CN 202210139812 A CN202210139812 A CN 202210139812A CN 114520698 A CN114520698 A CN 114520698A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
- H04B17/102—Power radiated at antenna
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a RSRP compensation method, a device and user equipment. The method comprises the following steps: setting a signal source to transmit a modulation signal, enabling a device to work in a linear region by signal intensity, keeping the signal intensity unchanged, and externally filling through an antenna port; randomly selecting one dimension aiming at different dimensions, and obtaining a corresponding first Received Signal Strength Indication (RSSI) value by traversing the positions of different resource blocks; setting a signal source to transmit a single-tone signal, setting the frequency as a local oscillator to be deviated to a right preset value, and keeping the signal strength consistent with the signal strength of a modulation signal transmitted by the signal source to obtain a second RSSI value of the single-tone signal; the first RSSI value and the second RSSI value are subjected to difference to obtain a compensation value of Reference Signal Received Power (RSRP); and repeating the steps for each dimension to obtain a plurality of compensation values. The invention can accurately compensate the RSRP measured by the SSB.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for compensating RSRP, and a user equipment.
Background
In NR (New Radio, New air interface), the downlink needs to support 100M signal bandwidth, and due to the influence of the Radio frequency front end and the filter, the frequency response at 100M sideband will be several db lower than the amplitude of the intermediate channel.
Since the Signal position of SSB (Synchronization Signal Block) in NR is not fixed, if the SSB position is at the sideband, RSRP (Reference Signal Receiving Power) estimated by SSB deviates from the actual Signal strength.
Taking the SSB with a sub-carrier bandwidth of 30KHz as an example, the bandwidth is 7.2MHz, but the NR cell is generally 100MHz, and due to the existence of frequency, the overall situation of the 100MHz bandwidth cannot be accurately reflected by the measurement result of the 7.2MHz bandwidth.
In order to solve the problem that the SSB measurement RSRP is inaccurate, a scheme of writing dead compensation values on a software side is adopted in the prior art, but the scheme cannot completely solve the existing problem due to the fact that different low noise amplifier gears and different channel frequency responses are different.
Disclosure of Invention
The RSRP compensation method, the device and the user equipment provided by the invention can accurately compensate the RSRP measured by the SSB.
In a first aspect, the present invention provides a method for compensating RSRP, the method comprising:
setting a signal source to transmit a modulation signal, enabling a device to work in a linear region by signal intensity, keeping the signal intensity unchanged, and externally filling through an antenna port;
randomly selecting one dimension aiming at different dimensions, and obtaining a corresponding first Received Signal Strength Indication (RSSI) value by traversing the positions of different resource blocks;
setting a signal source to transmit a single-tone signal, setting the frequency to be that a local oscillator deviates to a preset value to the right, and keeping the signal intensity consistent with the signal intensity of a modulation signal transmitted by the signal source to obtain a second RSSI value of the single-tone signal;
the first RSSI value and the second RSSI value are subjected to difference to obtain a compensation value of Reference Signal Received Power (RSRP);
and repeating the steps for each dimension to obtain a plurality of compensation values.
Optionally, the method further comprises:
fitting the plurality of compensation values to a quadratic curve;
the coefficients of the polynomial corresponding to the quadratic curve are stored in a non-volatile memory NV.
Optionally, the bandwidth of the modulation signal transmitted by the signal source is 20 RB;
the positions of traversing different resource blocks are specifically as follows: the positions of the different resource blocks are traversed at each interval of 20 RB.
Optionally, the different dimensions include one or more of different gain control words, different low noise amplifier stages, different channels, different frequency bands, different SSB locations, different bandwidths, and different receive paths.
In a second aspect, the present invention provides a device for RSRP compensation, the device comprising:
the setting unit is used for setting a signal source to transmit a modulation signal, enabling the device to work in a linear region due to the signal intensity, keeping the signal intensity unchanged, and externally filling the device through an antenna port;
the first acquisition unit is used for randomly selecting one dimension aiming at different dimensions and obtaining a corresponding first Received Signal Strength Indicator (RSSI) value by traversing the positions of different resource blocks;
the second acquisition unit is used for setting a signal source to transmit a single-tone signal, setting the frequency as a local oscillator to deviate to a right preset value, and keeping the signal intensity consistent with the signal intensity of a modulation signal transmitted by the signal source to obtain a second RSSI value of the single-tone signal;
and the calculating unit is used for subtracting the first RSSI value from the second RSSI value to obtain a compensation value of Reference Signal Received Power (RSRP).
Optionally, the apparatus further comprises:
a processing unit for fitting the plurality of compensation values to a quadratic curve;
a storage unit, configured to store the coefficients of the polynomial corresponding to the quadratic curve in a non-volatile memory NV.
Optionally, the bandwidth of the modulation signal transmitted by the signal source is 20 RB;
the positions of traversing different resource blocks are specifically as follows: the positions of the different resource blocks are traversed at each interval of 20 RB.
Optionally, the different dimensions include one or more of different gain control words, different low noise amplifier stages, different channels, different frequency bands, different SSB locations, different bandwidths, and different receive paths.
In a third aspect, the present invention provides a user equipment, including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the RSRP compensation method described above.
In a fourth aspect, the present invention provides a chip, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the RSRP compensation method described above.
In a fifth aspect, the present invention provides a computer readable storage medium, wherein the computer readable storage medium stores computer instructions, which when executed by a processor, implement the RSRP compensation method described above.
The RSRP compensation method, the RSRP compensation device and the user equipment provided by the embodiment of the 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, calibrate the RSRP measured by the SSB, and can realize accurate compensation effect after calibration.
Drawings
Fig. 1 is a flowchart of a RSRP compensation method according to an embodiment of the present invention;
fig. 2 is a flowchart of a RSRP compensation method according to another embodiment of the present invention;
fig. 3 is a graph obtained by performing polynomial fitting on a plurality of compensation values according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a RSRP compensation device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a RSRP compensation device according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a method for compensating RSRP, where the method is applied to user equipment, and as shown in fig. 1, the method includes:
and S11, setting a signal source to emit a modulation signal, enabling the device to work in a linear region by the signal intensity, keeping the signal intensity unchanged, and filling the device outside through an antenna port.
And S12, randomly selecting one dimension according to different dimensions, and obtaining a corresponding first Received Signal Strength Indicator (RSSI) value by traversing the positions of different resource blocks.
S13, setting a Signal source to transmit a single-tone Signal, setting the frequency as a local oscillator to be deviated to a right preset value, and keeping the Signal Strength consistent with the Signal Strength of the modulation Signal transmitted by the Signal source to obtain a second RSSI (Received Signal Strength Indication) value of the single-tone Signal.
And S14, subtracting the first RSSI value and the second RSSI value to obtain a compensation value of Reference Signal Received Power (RSRP).
The above steps S12-S14 are repeatedly performed for each dimension, resulting in a plurality of compensation values.
The RSRP compensation method provided by the embodiment of the 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, calibrates the RSRP measured by the SSB, and can realize accurate compensation effect after calibration.
The RSRP compensation method of the present invention is described in detail below with reference to specific embodiments.
In this embodiment, as a result of calibrating the external tone analog AGC (Automatic Gain Control), the frequency of the tone signal is the sum of the local downlink frequency plus freoffset (1 Mhz).
To model the differences between the different SSB locations and the calibration results, e.g., 100M bandwidth, SCS (carrier spacing) of 30K, the signal source sets the number of resource blocks to 20. And traversing the resource block compensation value, and calculating the difference value between the signal capability and the calibration signal strength of different SSB positions. Each frequency band scans high, medium and low channels, and all channels in the frequency band select compensation parameters nearby. The latitudes that need to be covered are: different gain control words, different lna levels, different channels, different frequency bands, different SSB locations, different bandwidths (more than 50M needed), and different receive paths.
As shown in fig. 2, a method for compensating RSRP according to an embodiment of the present invention includes:
and S21, setting a signal source to emit a modulation signal, enabling the device to work in a linear region by the signal intensity, keeping the signal intensity unchanged, and filling the device outside through an antenna port.
The bandwidth of the modulation signal transmitted by the signal source is 20 RBs (resource block, 12 subcarriers in succession in frequency, one slot in time domain, referred to as 1 RB).
And S22, randomly selecting one dimension according to different dimensions, and obtaining a corresponding first RSSI value by traversing the positions of different resource blocks.
Specifically, selecting a frequency band, a gain control word, a channel, by traversing the positions of the different resource blocks (each time interval 20RB), results in corresponding RSSI values, which are lower at the sidebands than at the middle band due to the frequency response of the rf front-end and the filter (this is also confirmed by the partial results in table 1), which is why RSRP is inaccurate if SSB falls at the sidebands.
S23, setting a signal source to transmit a single-tone signal, setting the frequency as a local oscillator to deviate to a right preset value, and keeping the signal strength consistent with the signal strength of the modulation signal transmitted by the signal source to obtain a second RSSI value of the single-tone signal.
Alternatively, the frequency may be set to the local oscillator offset to the right by 1 MHz.
And S24, obtaining a compensation value of the RSRP by making a difference between the first RSSI value obtained in the step S22 and the second RSSI value obtained in the step S23.
Repeating the steps S22-S24 for different frequency bands, different receiving paths, different channels and different gain control words, so as to obtain the data shown in table 1:
TABLE 1
And S25, fitting the compensation values into a quadratic curve.
S26, the coefficients of the polynomial corresponding to the quadratic curve are stored in the non-volatile memory NV.
Since the data amount is too large, if the entire data is written in NV (non-volatile memory) for storing control information and compensation of the look-up table is performed, a large overhead of NV space is increased. In order to save the storage space of NV, as shown in fig. 3, a quadratic curve is fitted to the corresponding compensation values at different resource block compensation positions, wherein the abscissa of the quadratic curve shown in fig. 3 is the RB offset, and the ordinate is the compensation value. The error caused by the method is only about plus or minus 0.5db, and the coefficient of the polynomial corresponding to the obtained quadratic curve is stored in the NV for the baseband calling, so that the storage space of the NV can be greatly saved.
TABLE 2
The RSRP compensation method provided by the embodiment of the 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, calibrates the RSRP measured by the SSB, and can realize accurate compensation effect after calibration; in addition, the compensation values corresponding to different resource block compensation positions are fitted into a quadratic curve, and the coefficients of the polynomial corresponding to the obtained quadratic curve are stored in the nonvolatile memory for the baseband calling, so that the storage space of the nonvolatile memory can be greatly saved.
An embodiment of the present invention further provides a RSRP compensation apparatus, where the apparatus is located in a user equipment, and as shown in fig. 4, the apparatus includes:
the setting unit 11 is used for setting a signal source to transmit a modulation signal, the signal intensity enables the device to work in a linear region, the signal intensity is kept unchanged, and the signal intensity is externally filled through an antenna port;
the first obtaining unit 12 is configured to arbitrarily select one dimension for different dimensions, and obtain a corresponding first received signal strength indicator RSSI value by traversing positions of different resource blocks;
a second obtaining unit 13, configured to set a signal source to transmit a single-tone signal, set a frequency to a local oscillator that deviates to the right by a predetermined value, and keep a signal strength consistent with a signal strength of a modulation signal transmitted by the signal source, to obtain a second RSSI value of the single-tone signal;
and the calculating unit 14 is configured to perform a difference between the first RSSI value and the second RSSI value to obtain a compensation value of reference signal received power RSRP.
The RSRP compensation device provided by the embodiment of the 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, calibrates the RSRP measured by the SSB, and can realize accurate compensation effect after calibration.
Further, as shown in fig. 5, the apparatus further includes:
a processing unit 15 for fitting the plurality of compensation values to a quadratic curve;
a storage unit 16, configured to store the coefficients of the polynomial corresponding to the quadratic curve in a non-volatile memory NV.
Optionally, the bandwidth of the modulation signal transmitted by the signal source is 20 RB;
the positions of traversing different resource blocks are specifically as follows: the positions of the different resource blocks are traversed at each interval of 20 RB.
Optionally, the different dimensions include one or more of different gain control words, different low noise amplifier stages, different channels, different frequency bands, different SSB locations, different bandwidths, and different receive paths.
The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
An embodiment of the present invention further provides a user equipment, where the user equipment includes:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the RSRP compensation method described above.
An embodiment of the present invention further provides a chip, where the chip includes:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of RSRP compensation described above.
The embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and the computer instructions, when executed by a processor, implement the RSRP compensation method described above.
It will be understood by those skilled in the art that all or part of the processes of the embodiments of the methods described above may be implemented by a computer program, which may be stored in a computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. A method of RSRP compensation, the method comprising:
a signal source is arranged to transmit a modulation signal, the signal intensity enables a device to work in a linear region, the signal intensity is kept unchanged, and the signal intensity is externally filled through an antenna port;
randomly selecting one dimension aiming at different dimensions, and obtaining a corresponding first Received Signal Strength Indication (RSSI) value by traversing the positions of different resource blocks;
setting a signal source to transmit a single-tone signal, setting the frequency as a local oscillator to be deviated to a right preset value, and keeping the signal strength consistent with the signal strength of a modulation signal transmitted by the signal source to obtain a second RSSI value of the single-tone signal;
the first RSSI value and the second RSSI value are subjected to difference to obtain a compensation value of Reference Signal Received Power (RSRP);
and repeating the steps for each dimension to obtain a plurality of compensation values.
2. The method of claim 1, further comprising:
fitting the plurality of compensation values to a quadratic curve;
the coefficients of the polynomial to which the quadratic curve corresponds are stored in a non-volatile memory NV.
3. The method of claim 1 or 2, wherein the bandwidth of the modulated signal transmitted by the signal source is 20 RB;
the positions of traversing different resource blocks are specifically as follows: the positions of the different resource blocks are traversed at each interval of 20 RB.
4. The method of claim 1 or 2, wherein the different dimensions comprise one or more of different gain control words, different low noise amplifier stages, different channels, different frequency bands, different SSB locations, different bandwidths, and different receive paths.
5. A device for RSRP compensation, the device comprising:
the setting unit is used for setting a signal source to transmit a modulation signal, enabling the device to work in a linear region due to the signal intensity, keeping the signal intensity unchanged, and externally filling the device through an antenna port;
the first acquisition unit is used for randomly selecting one dimension aiming at different dimensions and obtaining a corresponding first Received Signal Strength Indicator (RSSI) value by traversing the positions of different resource blocks;
the second acquisition unit is used for setting a signal source to transmit a single-tone signal, setting the frequency as a local oscillator to deviate to a right preset value, and keeping the signal intensity consistent with the signal intensity of a modulation signal transmitted by the signal source to obtain a second RSSI value of the single-tone signal;
and the calculating unit is used for subtracting the first RSSI value from the second RSSI value to obtain a compensation value of Reference Signal Received Power (RSRP).
6. The apparatus of claim 5, further comprising:
a processing unit for fitting the plurality of compensation values to a quadratic curve;
a storage unit, configured to store the coefficients of the polynomial corresponding to the quadratic curve in a non-volatile memory NV.
7. The apparatus of claim 5 or 6, wherein the bandwidth of the modulated signal transmitted by the signal source is 20 RB;
the positions of traversing different resource blocks are specifically as follows: the positions of the different resource blocks are traversed at each interval of 20 RB.
8. The apparatus of claim 5 or 6, wherein the different dimensions comprise one or more of different gain control words, different low noise amplifier stages, different channels, different frequency bands, different SSB locations, different bandwidths, and different receive paths.
9. A user equipment, the user equipment comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 4.
10. A chip, wherein the chip comprises:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 4.
11. A chip module, characterized in that it comprises a chip according to claim 10.
12. A computer readable storage medium, wherein the computer readable storage medium stores computer instructions which, when executed by a processor, implement the method of any one of claims 1 to 4.
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