A method, device and storage medium for combined uplink and downlink power control

Abstract

The present invention discloses an uplink and downlink combined power control method, device and storage medium. The method includes: when it is determined that RSRP meets a first preset condition, or when it is determined that the downlink RSSI meets a second preset condition, performing a downlink power amplifier attenuation value control operation; the downlink power amplifier attenuation value control operation includes: determining a target downlink power amplifier attenuation value according to RSRP, a first threshold value, a downlink RSSI, a preset downlink target power and a first downlink power amplifier attenuation value; when it is determined based on RSRP that the combined power control condition is met, performing an uplink power amplifier attenuation value control operation in combination with the downlink power amplifier attenuation value determined by measurement involved in the downlink power amplifier attenuation value control operation; the uplink power amplifier attenuation value control operation includes: when it is determined that the first downlink power amplifier attenuation value meets a third preset condition, or when it is determined that the uplink RSSI meets a fourth preset condition, determining the target uplink power amplifier attenuation value according to the uplink RSSI, the first downlink power amplifier attenuation value, the preset uplink target power and the first uplink power amplifier attenuation value.

Description

Technical Field

[0001] The present invention relates to high-speed rail communication technology, and in particular to an uplink and downlink combined power control method, device and storage medium. Background Art

[0002] To address signal coverage issues within high-speed trains, a related technology uses multi-stage cascaded micro-amplifiers to amplify and transmit signals within high-speed trains. Micro-amplifiers typically use a modem to demodulate the time slot conversion of uplink / downlink frames to control the transmit / receive switching of the RF link. The downlink power amplifier power of the micro-amplifier is controlled based on the downlink received signal strength (RSSI_DL) and the reference signal received power (RSRP) of the synchronization signal / physical broadcast channel block (SSB, (SS, synchronization signal) / (PBCH, physical broadcast channel) block), while the uplink power amplifier power of the micro-amplifier is controlled based on the uplink received signal strength (RSSI_UL). This means that uplink power control and downlink power control are performed independently. In some scenarios, such as those close to the base station, the uplink rate of some terminals may be limited. Summary of the Invention

[0003] In view of this, the main object of the present invention is to provide a method, device and storage medium for uplink and downlink combined power control.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] An embodiment of the present invention provides a method for combined uplink and downlink power control, the method comprising:

[0006] When it is determined that a reference signal received power (RSRP) satisfies a first preset condition, or when it is determined that a downlink received signal strength (RSSI) satisfies a second preset condition, a downlink power amplifier attenuation value control operation is performed; the downlink power amplifier attenuation value control operation includes: determining a target downlink power amplifier attenuation value based on the RSRP, a first threshold value, the downlink RSSI, a preset downlink target power, and the first downlink power amplifier attenuation value;

[0007] When it is determined based on the RSRP that the joint power control condition is met, the uplink power amplifier attenuation value control operation is performed in combination with the first downlink power amplifier attenuation value involved in the downlink power amplifier attenuation value control operation; the uplink power amplifier attenuation value control operation includes: determining that the first downlink power amplifier attenuation value meets the third preset condition, or, when determining that the uplink RSSI meets the fourth preset condition, determining the target uplink power amplifier attenuation value based on the uplink RSSI, the first downlink power amplifier attenuation value, the preset uplink target power and the first uplink power amplifier attenuation value.

[0008] In the above solution, determining that the RSRP satisfies the first preset condition includes: determining that the RSRP is greater than the first threshold value;

[0009] The determining that the downlink RSSI meets the second preset condition includes: determining that the downlink RSSI is greater than a preset downlink target power.

[0010] In the above solution, determining the target downlink power amplifier attenuation value according to the RSRP, the first threshold, the downlink RSSI, the preset downlink target power, and the first downlink power amplifier attenuation value includes:

[0011] Determining a first downlink process attenuation value according to the RSRP and the first threshold;

[0012] Determining a second downlink process attenuation value according to the downlink RSSI, the preset downlink target power, and the first downlink power amplifier attenuation value;

[0013] The larger value of the first downlink process attenuation value and the second downlink process attenuation value is determined as the target downlink power amplifier attenuation value.

[0014] In the above solution, the method further includes:

[0015] When it is determined that the RSRP is less than or equal to the first threshold value and that the downlink RSSI is less than the preset downlink target power, gradually adjusting the first downlink power amplifier attenuation value based on a preset first difference until the RSRP satisfies a first preset condition or the downlink RSSI satisfies a second preset condition;

[0016] When it is determined that the RSRP is less than or equal to the first threshold value and when it is determined that the downlink RSSI is equal to the preset downlink target power, the first downlink process attenuation value is kept unchanged and used as the target downlink power amplifier attenuation value.

[0017] In the above solution, determining whether the joint power control condition is met based on the RSRP includes: determining that the RSRP is greater than a preset second threshold value.

[0018] In the above solution, the determining that the first downlink power amplifier attenuation value satisfies a third preset condition includes: determining that the first downlink power amplifier attenuation value is greater than 0;

[0019] The determining that the uplink RSSI satisfies a fourth preset condition includes: determining that the uplink RSSI is greater than the preset uplink target power.

[0020] In the above solution, determining the target uplink power amplifier attenuation value according to the uplink RSSI, the first downlink power amplifier attenuation value, the preset uplink target power, and the first uplink power amplifier attenuation value includes:

[0021] Determining a first uplink process attenuation value according to the uplink RSSI, the preset uplink target power, and the first uplink power amplifier attenuation value;

[0022] Using the first downlink power amplifier attenuation value as the second uplink process attenuation value;

[0023] A larger value of the first uplink process attenuation value and the second uplink process attenuation value is determined as the target uplink power amplifier attenuation value.

[0024] In the above solution, the method further includes:

[0025] When it is determined that the first downlink power amplifier attenuation value is less than or equal to 0 and the uplink RSSI is less than the preset uplink target power, gradually adjusting the first uplink power amplifier attenuation value based on a preset second difference until the first downlink power amplifier attenuation value satisfies a third preset condition or the uplink RSSI satisfies a fourth preset condition;

[0026] When it is determined that the first downlink power amplifier attenuation value is less than or equal to 0 and the uplink RSSI is determined to be equal to the preset uplink target power, the first uplink process attenuation value is kept unchanged and is used as the target uplink power amplifier attenuation value.

[0027] In the above solution, when it is determined based on the RSRP that the joint power control condition is not met, the method further includes:

[0028] When it is determined that the uplink RSSI is greater than the preset uplink target power, determining a first uplink process attenuation value as the target uplink power amplifier attenuation value according to the uplink RSSI, the preset uplink target power, and the first uplink power amplifier attenuation value;

[0029] When it is determined that the uplink RSSI is less than the preset uplink target power, gradually adjusting the first uplink power amplifier attenuation value based on a preset second difference until the first downlink power amplifier attenuation value meets a third preset condition or the uplink RSSI meets a fourth preset condition;

[0030] When it is determined that the uplink RSSI is equal to the preset uplink target power, the first uplink process attenuation value is kept unchanged and is used as the target uplink power amplifier attenuation value.

[0031] An embodiment of the present invention provides an uplink and downlink combined power control device, the device comprising: a first processing module and a second processing module; wherein,

[0032] The first processing module is configured to perform a downlink power amplifier attenuation value control operation when determining that a reference signal received power RSRP satisfies a first preset condition or when determining that a downlink received signal strength RSSI satisfies a second preset condition; the downlink power amplifier attenuation value control operation includes: determining a target downlink power amplifier attenuation value based on the RSRP, a first threshold value, the downlink RSSI, a preset downlink target power, and a first downlink power amplifier attenuation value;

[0033] The second processing module is used to perform an uplink power amplifier attenuation value control operation in combination with the first downlink power amplifier attenuation value involved in the downlink power amplifier attenuation value control operation when determining that the joint power control condition is met based on the RSRP; the uplink power amplifier attenuation value control operation includes: determining that the first downlink power amplifier attenuation value meets the third preset condition, or determining that the uplink RSSI meets the fourth preset condition, determining the target uplink power amplifier attenuation value based on the uplink RSSI, the first downlink power amplifier attenuation value and the preset uplink target power, and the first uplink power amplifier attenuation value.

[0034] In the above solution, the determining that the reference signal received power RSRP satisfies the first preset condition includes: determining that the RSRP is greater than the first threshold value;

[0035] The determining that the downlink received signal strength RSSI meets the second preset condition includes: determining that the downlink RSSI is greater than a preset downlink target power.

[0036] In the above solution, the first processing module is used to determine a first downlink process attenuation value according to the RSRP and the first threshold value;

[0037] Determining a second downlink process attenuation value according to the downlink RSSI, the preset downlink target power, and the first downlink power amplifier attenuation value;

[0038] The larger value of the first downlink process attenuation value and the second downlink process attenuation value is determined as the target downlink power amplifier attenuation value.

[0039] In the above scheme, the first processing module is further configured to, when determining that the RSRP is less than or equal to the first threshold value and determining that the downlink RSSI is less than the preset downlink target power, gradually adjust the first downlink power amplifier attenuation value based on a preset first difference until the RSRP meets the first preset condition or the downlink RSSI meets the second preset condition;

[0040] When it is determined that the RSRP is less than or equal to the first threshold value and when it is determined that the downlink RSSI is equal to the preset downlink target power, the first downlink process attenuation value is kept unchanged and used as the target downlink power amplifier attenuation value.

[0041] In the above solution, determining whether the joint power control condition is met based on the RSRP includes: determining that the RSRP is greater than a preset second threshold value.

[0042] Specifically, determining that the first downlink power amplifier attenuation value satisfies a third preset condition includes: determining that the first downlink power amplifier attenuation value is greater than 0;

[0043] The determining that the uplink RSSI satisfies a fourth preset condition includes: determining that the uplink RSSI is greater than the preset uplink target power.

[0044] In the above solution, the second processing module is used to determine the first uplink process attenuation value according to the uplink RSSI, the preset uplink target power, and the first uplink power amplifier attenuation value;

[0045] Using the first downlink power amplifier attenuation value as the second uplink process attenuation value;

[0046] A larger value of the first uplink process attenuation value and the second uplink process attenuation value is determined as the target uplink power amplifier attenuation value.

[0047] In the above scheme, the second processing module is further used to determine that the first downlink power amplifier attenuation value is less than or equal to 0, and when it is determined that the uplink RSSI is less than the preset uplink target power, gradually adjust the first uplink power amplifier attenuation value based on a preset second difference until the first downlink power amplifier attenuation value meets a third preset condition or the uplink RSSI meets a fourth preset condition;

[0048] When it is determined that the first downlink power amplifier attenuation value is less than or equal to 0 and the uplink RSSI is determined to be equal to the preset uplink target power, the first uplink process attenuation value is kept unchanged and is used as the target uplink power amplifier attenuation value.

[0049] Specifically, when it is determined based on the RSRP that the joint power control condition is not met, the first processing module is further used to determine that when the uplink RSSI is greater than the preset uplink target power, the first uplink process attenuation value is determined according to the uplink RSSI, the preset uplink target power, and the first uplink power amplifier attenuation value, as the target uplink power amplifier attenuation value;

[0050] When it is determined that the uplink RSSI is less than the preset uplink target power, gradually adjusting the first uplink power amplifier attenuation value based on a preset second difference until the first downlink power amplifier attenuation value meets a third preset condition or the uplink RSSI meets a fourth preset condition;

[0051] When it is determined that the uplink RSSI is equal to the preset uplink target power, the first uplink process attenuation value is kept unchanged and is used as the target uplink power amplifier attenuation value.

[0052] An embodiment of the present invention provides an uplink and downlink combined power control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, steps of the uplink and downlink combined power control method are performed.

[0053] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the steps of the uplink and downlink combined power control method are performed.

[0054] An embodiment of the present invention provides an uplink and downlink joint power control method, device, and storage medium, including: performing a downlink power amplifier attenuation value control operation when determining that RSRP satisfies a first preset condition or when determining that the downlink RSSI satisfies a second preset condition; the downlink power amplifier attenuation value control operation includes: determining a target downlink power amplifier attenuation value based on the RSRP, a first threshold value, the downlink RSSI, a preset downlink target power, and a first downlink power amplifier attenuation value; performing an uplink power amplifier attenuation value control operation in combination with the first downlink power amplifier attenuation value involved in the downlink power amplifier attenuation value control operation when determining that the joint power control condition is satisfied based on the RSRP; the uplink power amplifier attenuation value control operation includes: determining the first downlink power amplifier attenuation value satisfies a third preset condition or when determining that the uplink RSSI satisfies a fourth preset condition, determining the target uplink power amplifier attenuation value based on the uplink RSSI, the first downlink power amplifier attenuation value, the preset uplink target power, and the first uplink power amplifier attenuation value. In this way, the uplink power amplifier power and the downlink power amplifier power are jointly controlled to effectively solve the problem of micro-amplification equipment in certain scenarios raising the noise floor of user terminals in the overall base station coverage area due to excessive uplink gain, thereby effectively improving the uplink rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 A schematic diagram of a power control process of a micro-amplifier;

[0056] Figure 2 This is a schematic diagram of the coverage of a micro-amplification device;

[0057] Figure 3 A schematic diagram of a flow chart of an uplink and downlink combined power control method provided by an embodiment of the present invention;

[0058] Figure 4 A schematic flow chart of another uplink and downlink combined power control method provided by an embodiment of the present invention;

[0059] Figure 5 A schematic diagram of a flow chart of a downlink power control method provided by an embodiment of the present invention;

[0060] Figure 6 A schematic diagram of a flow chart of an uplink power control method provided by an embodiment of the present invention;

[0061] Figure 7 A schematic structural diagram of an uplink and downlink combined power control device provided by an embodiment of the present invention;

[0062] Figure 8 A schematic structural diagram of another uplink and downlink combined power control device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0063] Before further describing the present invention in detail with reference to the embodiments, the related art will be described first.

[0064] Figure 1 FIG. 1 is a schematic diagram of a power control process of a micro-amplifier; FIG. Figure 1 As shown, the micro-amplifier performs downlink power control based on the downlink received signal strength (RSSI_DL) and RSRP, and performs uplink power control based on the uplink received signal strength (RSSI_UL). Uplink power control and downlink power control are performed independently.

[0065] Figure 2 is a schematic diagram of the coverage of a micro-amplification device; Figure 2 As shown in the figure, when the path loss is small, such as when the distance to the base station is close, the uplink transmission meets the rated transmit power, and the uplink micro-amplification gain needs to be adjusted very high. In this case, for terminal A (UE A) in the micro-amplification coverage area, both the signal and noise are amplified, and the signal-to-noise ratio remains unchanged. However, the noise amplification in the micro-amplification coverage area increases the overall uplink noise floor on the base station side.

[0066] At this point, for other terminals B (UE B) under the same host base station, the signal is not amplified, and the noise floor is raised, resulting in a decrease in the signal-to-noise ratio of terminals B in areas not covered by the micro-amplification, further reducing the uplink rate of terminals B. At the same time, excessive micro-amplification gain increases the power consumption of the micro-amplification, which is not conducive to energy conservation.

[0067] Based on this, the method provided by an embodiment of the present invention determines that when RSRP satisfies a first preset condition, or when it is determined that the downlink RSSI satisfies a second preset condition, a downlink power amplifier attenuation value control operation is performed; the downlink power amplifier attenuation value control operation includes: determining a target downlink power amplifier attenuation value based on the RSRP, a first threshold value, the downlink RSSI, a preset downlink target power, and a first downlink power amplifier attenuation value; when it is determined based on the RSRP that a joint power control condition is satisfied, an uplink power amplifier attenuation value control operation is performed in combination with the first downlink power amplifier attenuation value involved in the downlink power amplifier attenuation value control operation; the uplink power amplifier attenuation value control operation includes: determining that the first downlink power amplifier attenuation value satisfies a third preset condition, or when it is determined that the uplink RSSI satisfies a fourth preset condition, determining a target uplink power amplifier attenuation value based on the uplink RSSI, the first downlink power amplifier attenuation value, the preset uplink target power, and the first uplink power amplifier attenuation value.

[0068] The present invention will be further described in detail below with reference to the embodiments.

[0069] Figure 3 A schematic flow chart of an uplink and downlink combined power control method provided by an embodiment of the present invention; Figure 3 As shown, the uplink and downlink combined power control method is applied to any micro-amplification device, and the method includes:

[0070] Step 301: When it is determined that RSRP meets a first preset condition, or when it is determined that downlink RSSI meets a second preset condition, a downlink power amplifier attenuation value control operation is performed;

[0071] The uplink power amplifier attenuation value control operation includes: determining a target downlink power amplifier attenuation value according to the RSRP, the first threshold value, the downlink RSSI, a preset downlink target power and the first downlink power amplifier attenuation value;

[0072] Step 302: When it is determined based on the RSRP that a joint power control condition is met, an uplink power amplifier attenuation value control operation is performed in combination with the first downlink power amplifier attenuation value involved in the downlink power amplifier attenuation value control operation;

[0073] Among them, the uplink power amplifier attenuation value control operation includes: determining that the first downlink power amplifier attenuation value meets the third preset condition, or, when determining that the uplink RSSI meets the fourth preset condition, determining the target uplink power amplifier attenuation value based on the uplink RSSI, the first downlink power amplifier attenuation value and the preset uplink target power and the first uplink power amplifier attenuation value.

[0074] In some embodiments, determining that the RSRP satisfies a first preset condition includes: determining that the RSRP is greater than the first threshold value;

[0075] The determining that the downlink received signal strength RSSI meets the second preset condition includes: determining that the downlink RSSI is greater than a preset downlink target power.

[0076] Here, the first threshold value is the threshold value set for RSRP, recorded as RSRP_thr; it can be set by the developer based on his experience, or it can be set in combination with the downlink target power (Po_DL), downlink rated gain (Gain_DL), number of resource blocks (RB, Resource Block), etc. The specific setting method is not limited.

[0077] In one embodiment, determining the target downlink power amplifier attenuation value according to the RSRP, the first threshold, the downlink RSSI, a preset downlink target power, and the first downlink power amplifier attenuation value includes:

[0078] Determining a first downlink process attenuation value according to the RSRP and the first threshold;

[0079] Determining a second downlink process attenuation value according to the downlink RSSI, the preset downlink target power, and the first downlink power amplifier attenuation value;

[0080] The larger value of the first downlink process attenuation value and the second downlink process attenuation value is determined as the target downlink power amplifier attenuation value.

[0081] Specifically, the first downlink process attenuation value is determined according to the RSRP and the first threshold value, and is calculated as follows: first downlink process attenuation value (denoted as D1)=RSRP-RSRP_thr.

[0082] The second downlink process attenuation value is determined according to the downlink RSSI, the preset downlink target power, and the first downlink power amplifier attenuation value, and is calculated as follows: the second downlink process attenuation value (denoted as D2) = RSSI_DL - Po_DL + Att_DL_rect;

[0083] Among them, RSSI_DL represents the downlink RSSI;

[0084] Att_DL_rect represents the currently measured downlink power amplifier attenuation value, i.e., the first downlink power amplifier attenuation value;

[0085] Att_DL represents the newly calculated downlink power amplifier attenuation value.

[0086] In one embodiment, the method further includes:

[0087] When it is determined that the RSRP is less than or equal to the first threshold value and the downlink RSSI is less than the preset downlink target power, the first downlink power amplifier attenuation value is gradually adjusted based on a preset first difference until the RSRP meets the first preset condition or the downlink RSSI meets the second preset condition;

[0088] When it is determined that the RSRP is less than or equal to the first threshold value and the downlink RSSI is equal to the preset downlink target power, the first downlink process attenuation value remains unchanged as the target downlink power amplifier attenuation value.

[0089] Specifically, when RSRP > RSRP_thr, or, RSSI_DL > Po_DL, the target downlink power amplifier attenuation value takes the larger value of D1 and D2;

[0090] When RSSI_DL < Po_DL, Att_DL = Att_DL_rect – △, and the downlink power amplifier attenuation value is gradually adjusted by reducing △ dB based on the previous value; △ is the first difference, and the value of △ can be set to 0.1, 0.2, 0.5, etc. The specific setting can be determined based on the accuracy requirement. If the accuracy requirement is high, △ is smaller; if the accuracy requirement is low, the value of △ can be relatively larger; no specific numerical limit is set here. <​​​​​​​​​​​​The determining that the uplink RSSI satisfies a fourth preset condition includes: determining that the uplink RSSI is greater than the preset uplink target power.

[0096] In some embodiments, determining the target uplink power amplifier attenuation value based on the uplink RSSI, the first downlink power amplifier attenuation value, a preset uplink target power, and the first uplink power amplifier attenuation value includes:

[0097] Determining a first uplink process attenuation value according to the uplink RSSI, the preset uplink target power, and the first uplink power amplifier attenuation value;

[0098] Using the first downlink power amplifier attenuation value as the second uplink process attenuation value;

[0099] A larger value of the first uplink process attenuation value and the second uplink process attenuation value is determined as the target uplink power amplifier attenuation value.

[0100] Specifically, the first uplink process attenuation value is determined according to the uplink RSSI, the preset uplink target power, and the first uplink power amplifier attenuation value, and the calculation method is: first uplink process attenuation value (denoted as D3) = RSSI_UL-Po_UL+Att_UL_rect;

[0101] The first downlink power amplifier attenuation value is used as the second uplink process attenuation value, and the calculation method is: the second uplink process attenuation value (denoted as D4) = Att_DL_rect;

[0102] RSSI_UL indicates the uplink RSSI.

[0103] Po_UL represents the uplink target power;

[0104] Att_UL_rect represents the currently measured uplink power amplifier attenuation value, that is, the first uplink power amplifier attenuation value;

[0105] Att_DL_rect represents the currently measured downlink power amplifier attenuation value, that is, the first downlink power amplifier attenuation value.

[0106] In some embodiments, the method further comprises:

[0107] When it is determined that the first downlink power amplifier attenuation value is less than or equal to 0 and the uplink RSSI is less than the preset uplink target power, gradually adjusting the first uplink power amplifier attenuation value based on a preset second difference until the first downlink power amplifier attenuation value satisfies a third preset condition or the uplink RSSI satisfies a fourth preset condition;

[0108] When it is determined that the first downlink power amplifier attenuation value is less than or equal to 0 and the uplink RSSI is equal to the preset uplink target power, keep the first uplink process attenuation value unchanged as the target uplink power amplifier attenuation value.

[0109] Specifically, the control method for the uplink power amplifier attenuation value is as follows:

[0110] When D4 > 0 or the uplink RSSI > the uplink target power (Po_UL), take the larger value of D3 and D4;

[0111] When the uplink RSSI < Po_UL, the uplink power amplifier attenuation value is gradually adjusted by decreasing ΔdB based on the previous value; Δ is the second difference, and the value of Δ can be set to 0.1, 0.2, 0.5, etc. The specific setting can be determined based on the accuracy requirement. If the accuracy requirement is high, Δ is smaller; if the accuracy requirement is low, the value of Δ can be relatively larger; no specific numerical limit is set here. The first difference and the second difference can be the same or different;

[0112] When the uplink RSSI = Po_UL, keep the current attenuation value of the uplink power amplifier unchanged.

[0113] In some embodiments, when it is determined based on the RSRP that the joint power control condition is not satisfied, the method further includes: [[ID=第十六]] [[ID=第十七]]

[0114] When it is determined that the uplink RSSI is greater than the preset uplink target power, determine the first uplink process attenuation value based on the uplink RSSI, the preset uplink target power, and the first uplink power amplifier attenuation value as the target uplink power amplifier attenuation value;

[0115] When it is determined that the uplink RSSI is less than the preset uplink target power, gradually adjust the first uplink power amplifier attenuation value based on the preset second difference until the first downlink power amplifier attenuation value meets the third preset condition or the uplink RSSI meets the fourth preset condition;

[0116] When it is determined that the uplink RSSI is equal to the preset uplink target power, keep the first uplink process attenuation value unchanged as the target uplink power amplifier attenuation value.

[0117] Specifically, when RSRP <= RSRP_swth_thr, that is, when the uplink and downlink powers are not linked, the determination method for the uplink power amplifier attenuation value is:

[0118] When the uplink RSSI > Po_UL, the uplink power amplifier attenuation value is D3; [[ID=三十二]]

[0119] When the uplink RSSI < Po_UL, the uplink power amplifier attenuation value = the current uplink power amplifier attenuation value - △dB, that is, it is adjusted step by step until the first downlink power amplifier attenuation value meets the third preset condition or the uplink RSSI meets the fourth preset condition;

[0120] When the uplink RSSI = Po_UL, the uplink power amplifier attenuation value remains unchanged at the current attenuation value.

[0121] In the embodiments of the present invention, by setting the first threshold, the second threshold, the first difference, and the second difference, the stability of the adjustment can be improved.

[0122] Figure 4 It is a schematic flowchart of another uplink and downlink joint power control method provided by the embodiments of the present invention; as Figure 4 shown, the power control is divided into uplink power control and downlink power control. The uplink power attenuation value and the downlink power attenuation value are calculated respectively, and the value of the uplink power attenuation value is related to the downlink power attenuation value. Certain uplink / downlink joint adjustment criteria and judgment thresholds are set to realize the interlocking of uplink / downlink power control.

[0123] Specifically, the downlink power control is based on the joint calculation of RSRP and downlink RSSI for control. The basic principle is: according to RSRP, the power adjustment threshold and the downlink target power (Po_DL) are set. When it is greater than the RSRP threshold and less than the RSRP threshold, different criteria for calculating the attenuation power are performed. When it is less than the RSRP threshold, the attenuation power is determined by the downlink rated output power; when it is greater than the RSRP threshold, the attenuation value needs to be calculated according to the downlink power attenuation value at the same time. Specifically as Figure 5

[0124] Figure 5 It is a schematic flowchart of a downlink power control method provided by the embodiments of the present invention; as Figure 5 shown, the downlink power control method includes:

[0125] Step 501, determine whether the RSRP or the downlink received signal strength (RSSI_DL) meets the first preset condition;

[0126] When it is determined that the first preset condition is met, enter step 02;

[0127] When it is determined that the first preset condition is not met, enter step 03;

[0128] Here, the RSRP or RSSI_DL meets the first preset condition, including:

[0129] RSRP > RSRP_thr; or,

[0130] RSSI_DL > Po_DL;​

[0131] Among them, RSRP_thr represents the RSRP threshold, which is preset by developers. The setting method can be based on their experience or calculated and set in combination with the downlink target power (Po_DL), downlink rated gain (Gain_DL), and the number of RBs. There is no limitation here.

[0132] RSSI_DL represents the downlink received signal strength.

[0133] Step 502: Determine that the downlink process attenuation value is the larger value of D1 and D2.

[0134] Here, the downlink process attenuation values D1 and D2 are set as follows:

[0135] D1 = RSRP - RSRP_thr;

[0136] D2 = RSSI_DL – Po_DL + Att_DL_rect;

[0137] Here, Po_DL represents the downlink target power, which is determined by the manufacturer or user according to the application requirements, that is, set the corresponding power according to how much downlink power is needed.

[0138] Att_DL_rect represents the current downlink power amplifier attenuation value determined by real-time detection.

[0139] Att_DL represents the newly calculated current downlink power amplifier attenuation value.

[0140] Step 503: When judging whether RSSI_DL is less than Po_DL, when it is determined that RSSI_DL < Po_DL, gradually lower the downlink power amplifier attenuation value; when it is determined that RSSI_DL is equal to Po_DL, the downlink power amplifier attenuation value remains unchanged.

[0141] Specifically, according to the formula Att_DL = Att_DL_rect – △, reduce the downlink power amplifier attenuation value by △ dB based on the previous value and adjust it step by step. The value of △ can be set to 0.1, 0.2, 0.5, etc. The specific setting can be determined based on the accuracy requirements. If the accuracy requirements are high, △ is smaller; if the accuracy requirements are low, the value of △ can be relatively larger. There is no specific numerical limitation here.

[0142] Specifically, the uplink power amplifier power control is based on the uplink RSSI power control, the uplink / downlink RSRP linkage threshold value and the downlink power attenuation value. The basic principle is: set the start threshold of the uplink and downlink power linkage, and perform attenuation power calculations according to different criteria when the value is greater than the linkage threshold and when it is less than the linkage threshold. When it is less than the linkage threshold, the linkage is closed, and the attenuation power is determined by the uplink rated output power; when it is greater than the linkage threshold, the attenuation value needs to be calculated based on the downlink power attenuation value. Specifically, Figure 6 shown.

[0143] Figure 6 A schematic diagram of a flow chart of an uplink power control method provided by an embodiment of the present invention; Figure 6 As shown, the uplink power control method includes:

[0144] Step 601: Determine whether RSRP is greater than the uplink and downlink linkage threshold (RSRP_swth_thr); if RSRP is greater than RSRP_swth_thr, proceed to step 601; otherwise, proceed to step 605;

[0145] Here, RSRP_swth_thr is pre-set by the developer. By setting the uplink and downlink linkage threshold, it is ensured that linkage control is performed only under specific circumstances.

[0146] Step 602: Determine whether the following conditions are met: the current downlink power amplifier attenuation value (denoted as D4)>0 or the uplink received signal strength (denoted as RSSI_UL)>uplink rated output power (Po_UL);

[0147] When it is determined that D4>0 or RSSI_UL>Po_UL, go to step 603; otherwise, go to step 604;

[0148] Step 603: Take the maximum value of the uplink process attenuation values ​​D3 and D4; otherwise, proceed to step 605;

[0149] Here, the uplink attenuation values ​​D3 and D4 are set as:

[0150] D3=RSSI_UL–Po_UL+Att_UL_rect;

[0151] D4 = Att_DL_rect;

[0152] Among them, RSSI_UL represents the uplink received signal strength;

[0153] Po_UL represents the rated uplink output power. It is determined by the manufacturer or user based on application requirements. In other words, the power is set accordingly to the required uplink power.

[0154] Att_UL_rect represents the current uplink power amplifier attenuation value determined by real-time detection;

[0155] Att_DL_rect represents the current downlink power amplifier attenuation value determined by real-time detection.

[0156] Step 604: When it is determined that RSSI_UL is less than Po_UL, gradually decrease the uplink power amplifier attenuation value; when it is determined that RSSI_UL is equal to Po_UL, keep the uplink power amplifier attenuation value unchanged;

[0157] Specifically, according to the formula Att_UL = Att_UL_rect – △, reduce the uplink power amplifier attenuation value by △ dB based on the previous value and adjust it step by step. The value of △ can be 0.1, 0.2, etc., and can be specifically set according to the accuracy requirements. If the accuracy requirements are high, △ is smaller; if the accuracy requirements are low, the value of △ can be relatively larger; it is specifically set based on actual requirements and is not limited here.

[0158] Step 605: When RSRP <= RSRP_swth_thr (the uplink and downlink powers are not linked), compare the uplink RSSI and the uplink rated output power;

[0159] When the uplink RSSI > Po_UL, the uplink process attenuation value is D3;

[0160] When the uplink RSSI < Po_UL, the uplink process attenuation value = the current value – △ dB;

[0161] Otherwise, the uplink attenuation value remains unchanged.

[0162] By jointly controlling the uplink and downlink powers, the problem that in some scenarios, the uplink gain of the microwave amplifier is too large, thereby increasing the noise floor of users in the overall base station coverage area and restricting the uplink rate, is effectively solved, and the uplink rate is greatly improved. Moreover, by setting the RSRP judgment threshold for the uplink / downlink joint power, the uplink attenuation calculation method in different gain scenarios is realized, and the uplink / downlink power joint control is started. The linkage automatic control is realized, and the robustness of the overall solution is enhanced.

[0163] The method provided by the embodiment of the present invention can adopt the uplink / downlink power control linkage method for both single-stage microwave amplifier links and multi-stage microwave amplifier cascade links, effectively control the microwave amplifier gain, and achieve equipment energy saving to a certain extent.

[0164] Figure 7 It is a schematic structural diagram of a uplink / downlink joint power control device provided by an embodiment of the present invention; as Figure 7 shown, the device includes: a first processing module, a second processing module; where

[0165] The first processing module is configured to perform a downlink power amplifier attenuation value control operation when determining that the RSRP satisfies a first preset condition or when determining that the downlink RSSI satisfies a second preset condition; the downlink power amplifier attenuation value control operation includes: determining a target downlink power amplifier attenuation value based on the RSRP, a first threshold value, the downlink RSSI, a preset downlink target power, and the first downlink power amplifier attenuation value;

[0166] The second processing module is used to perform an uplink power amplifier attenuation value control operation in combination with the first downlink power amplifier attenuation value involved in the downlink power amplifier attenuation value control operation when determining that the joint power control condition is met based on the RSRP; the uplink power amplifier attenuation value control operation includes: determining that the first downlink power amplifier attenuation value meets the third preset condition, or determining that the uplink RSSI meets the fourth preset condition, determining the target uplink power amplifier attenuation value based on the uplink RSSI, the first downlink power amplifier attenuation value, the preset uplink target power and the first uplink power amplifier attenuation value.

[0167] Specifically, determining that the RSRP satisfies a first preset condition includes: determining that the RSRP is greater than the first threshold value;

[0168] The determining that the downlink RSSI meets the second preset condition includes: determining that the downlink RSSI is greater than a preset downlink target power.

[0169] Specifically, the first processing module is configured to determine a first downlink process attenuation value according to the RSRP and the first threshold value;

[0170] Determining a second downlink process attenuation value according to the downlink RSSI, the preset downlink target power, and the first downlink power amplifier attenuation value;

[0171] The larger value of the first downlink process attenuation value and the second downlink process attenuation value is determined as the target downlink power amplifier attenuation value.

[0172] Specifically, the first processing module is further configured to, when determining that the RSRP is less than or equal to the first threshold value and determining that the downlink RSSI is less than the preset downlink target power, gradually adjust the first downlink power amplifier attenuation value based on a preset first difference until the RSRP satisfies a first preset condition or the downlink RSSI satisfies a second preset condition;

[0173] When it is determined that the RSRP is less than or equal to the first threshold value and when it is determined that the downlink RSSI is equal to the preset downlink target power, the first downlink process attenuation value is kept unchanged and used as the target downlink power amplifier attenuation value.

[0174] Specifically, determining that a joint power control condition is satisfied based on the RSRP includes: determining that the RSRP is greater than a preset second threshold value.

[0175] Specifically, determining that the first downlink power amplifier attenuation value satisfies a third preset condition includes: determining that the first downlink power amplifier attenuation value is greater than 0;

[0176] The determining that the uplink RSSI satisfies a fourth preset condition includes: determining that the uplink RSSI is greater than the preset uplink target power.

[0177] Specifically, the second processing module is used to determine the first uplink process attenuation value according to the uplink RSSI, the preset uplink target power, and the first uplink power amplifier attenuation value;

[0178] Using the first downlink power amplifier attenuation value as the second uplink process attenuation value;

[0179] A larger value of the first uplink process attenuation value and the second uplink process attenuation value is determined as the target uplink power amplifier attenuation value.

[0180] Specifically, the second processing module is further configured to, when determining that the first downlink power amplifier attenuation value is less than or equal to 0 and determining that the uplink RSSI is less than the preset uplink target power, gradually adjust the first uplink power amplifier attenuation value based on a preset second difference until the first downlink power amplifier attenuation value satisfies a third preset condition or the uplink RSSI satisfies a fourth preset condition;

[0181] When it is determined that the first downlink power amplifier attenuation value is less than or equal to 0 and the uplink RSSI is determined to be equal to the preset uplink target power, the first uplink process attenuation value is kept unchanged and is used as the target uplink power amplifier attenuation value.

[0182] Specifically, when it is determined based on the RSRP that the joint power control condition is not met, the first processing module is further used to determine that when the uplink RSSI is greater than the preset uplink target power, the first uplink process attenuation value is determined according to the uplink RSSI, the preset uplink target power, and the first uplink power amplifier attenuation value, as the target uplink power amplifier attenuation value;

[0183] When it is determined that the uplink RSSI is less than the preset uplink target power, gradually adjusting the first uplink power amplifier attenuation value based on a preset second difference until the first downlink power amplifier attenuation value meets a third preset condition or the uplink RSSI meets a fourth preset condition;

[0184] When it is determined that the uplink RSSI is equal to the preset uplink target power, the first uplink process attenuation value is kept unchanged and is used as the target uplink power amplifier attenuation value.

[0185] It should be noted that the above-described embodiments provide an uplink and downlink combined power control apparatus, and only illustrate the division of the above-described program modules when implementing the corresponding uplink and downlink combined power control method. In actual applications, the above-described processing can be assigned to different program modules as needed, that is, the internal structure of the network device can be divided into different program modules to complete all or part of the above-described processing. In addition, the apparatus provided in the above-described embodiments and the corresponding method embodiments are based on the same concept. The specific implementation process is detailed in the method embodiments and will not be repeated here.

[0186] Figure 8 A schematic diagram of the structure of an uplink and downlink combined power control device provided in an embodiment of the present invention; Figure 8 As shown, the device 80 includes: a processor 801 and a memory 802 for storing a computer program that can be run on the processor; wherein, when the processor 801 is used to run the computer program, it is executed: when determining that RSRP meets a first preset condition, or when determining that the downlink RSSI meets a second preset condition, executing a downlink power amplifier attenuation value control operation; the downlink power amplifier attenuation value control operation includes: determining a target downlink power amplifier attenuation value based on the RSRP, a first threshold value, the downlink RSSI, a preset downlink target power, and a first downlink power amplifier attenuation value; when determining that a joint power control condition is met based on the RSRP, executing an uplink power amplifier attenuation value control operation in combination with the first downlink power amplifier attenuation value involved in the downlink power amplifier attenuation value control operation; the uplink power amplifier attenuation value control operation includes: when determining that the first downlink power amplifier attenuation value meets a third preset condition, or when determining that the uplink RSSI meets a fourth preset condition, determining a target uplink power amplifier attenuation value based on the uplink RSSI, the first downlink power amplifier attenuation value, the preset uplink target power, and the first uplink power amplifier attenuation value. Specifically, the device 80 can perform the following steps: Figure 3 The method shown, with Figure 3 The method embodiments shown belong to the same concept, and their specific implementation processes are detailed in the method embodiments, which will not be repeated here.

[0187] In actual application, the device 80 may further include: at least one network interface 803. The various components in the uplink and downlink combined power control device 80 are coupled together via a bus system 804. It is understood that the bus system 804 is used to achieve connection and communication between these components. In addition to the data bus, the bus system 804 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Figure 8In the figure, various buses are labeled as bus system 804. There may be at least one processor 801. The network interface 803 is used for wired or wireless communication between the uplink and downlink combined power control apparatus 80 and other devices.

[0188] The memory 802 in the embodiment of the present invention is used to store various types of data to support the operation of the uplink and downlink combined power control device 80.

[0189] The methods disclosed in the above embodiments of the present invention can be applied to or implemented by processor 801. Processor 801 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits in processor 801 or by software instructions. Processor 801 may be a general-purpose processor, a digital signal processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc. Processor 801 can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present invention can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in memory 802. Processor 801 reads information from memory 802 and, in conjunction with its hardware, completes the steps of the above method.

[0190] In an exemplary embodiment, the uplink and downlink combined power control device 80 can be implemented by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers (MCUs), microprocessors, or other electronic components to execute the aforementioned method.

[0191] An embodiment of the present invention also provides a computer-readable storage medium having a computer program stored thereon; when the computer program is run by a processor, it executes: when it is determined that RSRP satisfies a first preset condition, or when it is determined that the downlink RSSI satisfies a second preset condition, a downlink power amplifier attenuation value control operation is executed; the downlink power amplifier attenuation value control operation includes: determining a target downlink power amplifier attenuation value based on the RSRP, the first threshold value, the downlink RSSI, the preset downlink target power and the first downlink power amplifier attenuation value; when it is determined based on the RSRP that a joint power control condition is satisfied, an uplink power amplifier attenuation value control operation is executed in combination with the first downlink power amplifier attenuation value involved in the downlink power amplifier attenuation value control operation; the uplink power amplifier attenuation value control operation includes: when it is determined that the first downlink power amplifier attenuation value satisfies a third preset condition, or when it is determined that the uplink RSSI satisfies a fourth preset condition, a target uplink power amplifier attenuation value is determined based on the uplink RSSI, the first downlink power amplifier attenuation value, the preset uplink target power and the first uplink power amplifier attenuation value. Specifically, the computer-readable storage medium can execute the following Figure 3 The method shown, with Figure 3 The embodiments of the uplink and downlink combined power control method shown belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0192] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0193] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0194] In addition, all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0195] Those skilled in the art will appreciate that all or part of the steps of the above-mentioned method embodiments may be implemented by hardware associated with program instructions, and the aforementioned program may be stored in a computer-readable storage medium. When the program is executed, the program executes the steps of the above-mentioned method embodiments. The aforementioned storage medium includes various media that can store program codes, such as mobile storage devices, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0196] Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

[0197] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0198] In addition, the technical solutions described in the embodiments of the present application can be arbitrarily combined without conflict.

[0199] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A method for joint uplink and downlink power control, characterized in that: The method comprises: When it is determined that the reference signal received power RSRP meets the first preset condition, or when it is determined that the downlink received signal strength RSSI meets the second preset condition, a downlink power amplifier attenuation value control operation is performed; the downlink power amplifier attenuation value control operation includes: determining a target downlink power amplifier attenuation value based on the RSRP, a first threshold value, the downlink RSSI, a preset downlink target power, and the first downlink power amplifier attenuation value; When it is determined that the RSRP is greater than a preset second threshold value, an uplink power amplifier attenuation value control operation is performed in combination with the first downlink power amplifier attenuation value involved in the downlink power amplifier attenuation value control operation; the uplink power amplifier attenuation value control operation includes: when it is determined that the first downlink power amplifier attenuation value is greater than 0, or when it is determined that the uplink RSSI is greater than a preset uplink target power, a first uplink process attenuation value is determined based on the uplink RSSI, the preset uplink target power, and the first uplink power amplifier attenuation value; the first downlink power amplifier attenuation value is used as the second uplink process attenuation value; and the larger value of the first uplink process attenuation value and the second uplink process attenuation value is determined as the target uplink power amplifier attenuation value.

2. The method according to claim 1, characterized in that The determining that the reference signal received power RSRP satisfies the first preset condition includes: determining that the RSRP is greater than the first threshold value; The determining that the downlink received signal strength RSSI meets the second preset condition includes: determining that the downlink RSSI is greater than a preset downlink target power.

3. The method according to claim 2, characterized in that The determining a target downlink power amplifier attenuation value according to the RSRP, the first threshold, the downlink RSSI, a preset downlink target power, and a first downlink power amplifier attenuation value includes: Determining a first downlink process attenuation value according to the RSRP and the first threshold; Determining a second downlink process attenuation value according to the downlink RSSI, the preset downlink target power, and the first downlink power amplifier attenuation value; The larger value of the first downlink process attenuation value and the second downlink process attenuation value is determined as the target downlink power amplifier attenuation value.

4. The method according to claim 2, characterized in that The method further comprises: When it is determined that the RSRP is less than or equal to the first threshold value and that the downlink RSSI is less than the preset downlink target power, gradually adjusting the first downlink power amplifier attenuation value based on a preset first difference until the RSRP satisfies a first preset condition or the downlink RSSI satisfies a second preset condition; When it is determined that the RSRP is less than or equal to the first threshold value and when it is determined that the downlink RSSI is equal to the preset downlink target power, the first downlink process attenuation value is kept unchanged and used as the target downlink power amplifier attenuation value.

5. The method according to claim 1, wherein The method further comprises: When it is determined that the first downlink power amplifier attenuation value is less than or equal to 0 and the uplink RSSI is less than the preset uplink target power, gradually adjusting the first uplink power amplifier attenuation value based on a preset second difference until the first downlink power amplifier attenuation value meets a third preset condition or the uplink RSSI meets a fourth preset condition; When it is determined that the first downlink power amplifier attenuation value is less than or equal to 0 and the uplink RSSI is determined to be equal to the preset uplink target power, the first uplink process attenuation value is kept unchanged and is used as the target uplink power amplifier attenuation value.

6. The method according to claim 1, characterized in that When it is determined based on the RSRP that a joint power control condition is not met, the method further includes: When it is determined that the uplink RSSI is greater than the preset uplink target power, determining a first uplink process attenuation value as the target uplink power amplifier attenuation value according to the uplink RSSI, the preset uplink target power, and the first uplink power amplifier attenuation value; When it is determined that the uplink RSSI is less than the preset uplink target power, gradually adjusting the first uplink power amplifier attenuation value based on a preset second difference until the first downlink power amplifier attenuation value meets a third preset condition or the uplink RSSI meets a fourth preset condition; When it is determined that the uplink RSSI is equal to the preset uplink target power, the first uplink process attenuation value is kept unchanged and is used as the target uplink power amplifier attenuation value.

7. A combined uplink and downlink power control device, characterized in that: The device comprises: a first processing module and a second processing module; wherein, The first processing module is configured to perform a downlink power amplifier attenuation value control operation when determining that a reference signal received power RSRP satisfies a first preset condition or when determining that a downlink received signal strength RSSI satisfies a second preset condition; the downlink power amplifier attenuation value control operation includes: determining a target downlink power amplifier attenuation value based on the RSRP, a first threshold value, the downlink RSSI, a preset downlink target power, and a first downlink power amplifier attenuation value; The second processing module is used to perform an uplink power amplifier attenuation value control operation in combination with the first downlink power amplifier attenuation value involved in the downlink power amplifier attenuation value control operation when determining that the RSRP is greater than a preset second threshold value; the uplink power amplifier attenuation value control operation includes: determining the first downlink power amplifier attenuation value is greater than 0, or determining that the uplink RSSI is greater than a preset uplink target power, determining the first uplink process attenuation value according to the uplink RSSI, the preset uplink target power, and the first uplink power amplifier attenuation value; using the first downlink power amplifier attenuation value as the second uplink process attenuation value; and determining the larger value of the first uplink process attenuation value and the second uplink process attenuation value as the target uplink power amplifier attenuation value.

8. A device for combined uplink and downlink power control, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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