WO2013078808A1

WO2013078808A1 - Method and apparatus for reporting gain factor

Info

Publication number: WO2013078808A1
Application number: PCT/CN2012/073679
Authority: WO
Inventors: 杨培营; 仇岩; 宋飞; 邓阳; 高明
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-11-28
Filing date: 2012-04-09
Publication date: 2013-06-06
Also published as: CN103139795A; CN103139795B

Abstract

Disclosed are a method and an apparatus for reporting a gain factor. The method comprises: comparing a radio remote unit (RRU) of a gain factor to be reported with a radio frequency link budget gain of a preset reference RRU, an analog to digital converter (ADC) quantized gain and a digital link gain; according to a gain difference obtained through comparison and an analog gain budget value of the reference RRU, determining an analog fixed gain value of the RRU of the gain factor to be reported; and reporting the analog fixed gain value. By means of the present invention, a base band unit (BBU) can calculate a signal-to-noise ratio of an antenna accurately in real time according to a calibration equation of the reference RRU without identifying the RRU type.

Description

The present invention relates to the field of communications, and in particular to a method and apparatus for reporting a gain factor. The current base station performs closed-loop power control when performing service interaction with a user equipment (User Equipment, UE for short), ensuring that all UEs within the coverage radius of the cell can adjust the appropriate power according to their position to the base station to ensure that the base station receives the base station. The multi-UE signal power level is comparable. For the base station, the important closed-loop parameter is the signal-to-noise ratio calculation of the receiving RF port, and the SNR result is converted into control information and sent to the UE for uplink power control adjustment. If the received signal-to-noise ratio (SR) is large, the transmission path is in good condition, and the UE side can reduce the transmission power. Otherwise, the transmission path is in poor condition and the UE needs to increase the transmission. Power, to ensure the stability of signal reception. FIG. 1 is a schematic diagram of a closed loop power control path according to the related art. As shown in FIG. 1 , the base station side needs to know the true and accurate receiving RF power of the radio remote unit (Radio Remote Unit, RRU for short), however, the baseband receiving The digital power is processed by the RRU link, so the RRU is reported in real time by the RRU to estimate the true and accurate RF power of the antenna port. The gain reporting method used in the related art is as follows: Each type of RRU and the baseband unit (BBU) are scaled once, and the power value of the RRU air interface is corresponding to the digital power amplitude received by the BBU side. In this way, in the process of estimating the true and accurate RF power of the antenna port, the BBU side must know the model of the connected RRU in advance, and adopt different scaling coefficients for different RRUs, and the gain value is inserted into the common public wireless interface ( The Common Public Radio Interface (CPRI) protocol is reported in the control word. SUMMARY OF THE INVENTION The present invention provides a gain factor reporting method and apparatus to address at least the problem of employing different scaling factors for different RRUs in the related art. According to an aspect of the present invention, a gain factor reporting method is provided, including: an RF link budget gain of an RRU to be reported with a gain factor and a preset reference RRU, and an analog to digital converter (Analog to Digital Conventer, referred to as Compare the quantization gain and the digital link gain for the ADC; the gain difference from the comparison The value and the analog gain budget value of the reference RRU determine the analog fixed gain value of the RRU to which the gain factor is to be reported; report the analog fixed gain value. The analog fixed gain value of the RRU that determines the gain factor to be reported is determined according to the difference between the gain obtained by the comparison and the simulated gain budget value of the reference RRU, including: determining that the analog fixed gain value is equal to GAIN0 - RF_dec - ADC_dec - DDC_dec, where GAIN0 is the reference RRU The analog gain budget value, RF_dec is the gain difference of the calculated RF link budget gain, ADC_dec is the gain difference of the compared ADC quantization gain, and DDC_dec is the gain difference of the compared digital link gain. The full scale of the ADC corresponding to the reference RRU is 2Vp-p, and the external resistance of the reference RRU is 200 ohms.

Next, , where X is to be on

The input external resistance of the RRU of the gain factor is reported. In the case where the RRU to which the gain factor is to be reported is extended by N bits with respect to the lower order of the reference RRU and the non-zero intermediate frequency real filter down-converted case, DDC_dec = 20*log2 ^N -3db. The reported analog fixed gain value includes: inserting the analog fixed gain value into the data; and reporting the inserted data. Inserting the analog fixed gain value into the data includes: Inserting the analog fixed gain value plus the RXATT adjustment gain value and the VGA adjustment gain value into the data. Before inserting the analog fixed gain value plus the RXATT adjustment gain value and the VGA adjustment gain value into the data, the method further includes: measuring a delay value of the RRU radio frequency input from the to-be-reported gain factor into the data to insert the analog fixed gain value; The delay value delays the operation of inserting the RXATT adjustment gain value and the VGA adjustment gain value into the data, and adds a start judgment and an end judgment as gain value extraction flags of the alignment adjustment data. According to another aspect of the present invention, a gain factor reporting apparatus is provided, comprising: a comparison module, a radio link budget gain, an ADC quantization gain, and a number of an RRU to which a gain factor is to be reported and a preset reference RRU The link gain is compared; the determining module is configured to determine an analog fixed gain value of the RRU of the to-be-reported gain factor according to the compared gain difference value and the analog gain budget value of the reference RRU; and the reporting module is configured to report the simulated fixed gain value . The determining module includes: a determining submodule for determining that the analog fixed gain value is equal to GAIN0 - RF_dec -

ADC dec - DDC dec - 3db, where GAIN0 is the analog gain budget of the reference RRU, RF dec It is the gain difference of the obtained RF link budget gain, ADC_dec is the gain difference of the compared ADC quantization gain, and DDC dec is the gain difference of the compared digital link gain. The full scale of the ADC corresponding to the reference RRU is 2Vp-p, and the external resistance of the reference RRU is 200 ohms.

Next, , where X is to be on

Report the gain factor of the RRU input external resistance. Through the invention, the difference between different types of RRU hardware and link processing is normalized, and the problem of using different scaling coefficients for different RRUs in the related art is solved, and the BBU does not need to identify the RRU type, and is scaled according to a reference RRU. The formula can accurately calculate the signal-to-noise ratio of the antenna port in real time. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a schematic diagram of a closed loop power control path according to the related art; FIG. 2 is a flowchart of a gain factor reporting method according to an embodiment of the present invention; FIG. 3 is a RRU processing link according to a preferred embodiment of the present invention. The position of the three-part unit that brings the gain

4 is a schematic diagram of a post-spectrum spectrum of an ADC according to a preferred embodiment of the present invention; FIG. 5 is a schematic diagram of a spectrum after NCO shifting in accordance with a preferred embodiment of the present invention; FIG. 6 is a diagram of a low pass filtered spectrum according to a preferred embodiment of the present invention. 7 is a schematic diagram of gain factor insertion data reporting in accordance with a preferred embodiment of the present invention; FIG. 8 is a schematic diagram of insertion data reporting after gain factor buffer Tuldelay in accordance with a preferred embodiment of the present invention; FIG. a block diagram of a gain factor reporting device; 10 is a block diagram showing the structure of a gain factor reporting apparatus according to a preferred embodiment of the present invention; FIG. 11 is a block diagram 3 of a structure of a gain factor reporting apparatus according to a preferred embodiment of the present invention; FIG. 12 is a gain factor according to a preferred embodiment of the present invention. The block diagram of the reporting device is four. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. The present invention provides a gain factor reporting method, and FIG. 2 is a flowchart of a gain factor reporting method according to an embodiment of the present invention, which includes the following steps S202 to S206. Step S202, comparing the RRU of the gain factor to be reported with the RF link budget gain, ADC quantization gain and digital link gain of the preset reference RRU. Step S204, determining an analog fixed gain value of the RRU to which the gain factor is to be reported according to the compared gain difference value and the analog gain budget value of the reference RRU. Step S206, reporting an analog fixed gain value. In the related art, the gain factor reporting method uses different types of RRUs and the BBU to perform a calibration, and the gain value of the RRU air interface corresponds to the digital power amplitude received by the BBU side. In the embodiment of the present invention, by normalizing the difference between different types of RRU hardware and link processing, the BBU does not need to identify the RRU type, and can accurately calculate the signal-to-noise ratio of the antenna port in real time according to a benchmark RRU calibration formula. Preferably, determining the analog fixed gain value of the to-be-reported gain factor RRU according to the compared gain difference value and the analog gain budget value of the reference RRU comprises: determining that the analog fixed gain value is equal to GAIN0 - RF_dec - ADC dec - DDC dec - 3db, Where GAIN0 is the analog gain budget of the reference RRU, RF_dec is the gain difference of the calculated RF link budget gain, ADC_dec is the gain difference of the compared ADC quantization gain, and DDC_dec is the comparison of the digital link gain Gain difference. In the preferred embodiment, the analog fixed gain value is directly calculated by GAIN0 - RF dec - ADC_dec - DDC_dec - 3db, and the calculation process is simple and reliable. Preferably, the full scale of the ADC corresponding to the reference RRU is 2Vp-p, and the external resistance of the reference RRU is 200 ί.

ADC _ dec = {dBm) — 10 * log

In the case of ohms, 10

X in X is the RRU input external resistance of the gain factor to be reported. Preferably, in the case where the RRU of the gain factor to be reported is extended by N bits with respect to the lower bit of the reference RRU, the non-zero intermediate frequency real filtering down conversion gain loss is combined, DDC_dec = 20*log2 ^N -3db. Preferably, reporting the simulated fixed gain value comprises: inserting the analog fixed gain value into the data; and reporting the inserted data. In the preferred embodiment, by inserting the real-time calculated gain factor into the data and reporting it, the synchronization of the gain factor and the received signal power variation is ensured, and the real-time accuracy of the applied gain factor calculation SR is improved. Preferably, inserting the analog fixed gain value into the data comprises: inserting the analog fixed gain value plus the RXATT adjustment gain value and the VGA adjustment gain value into the data. Considering that RXATT adjusts the attenuation of the large signal input to the antenna port, the input signal of the antenna port is amplified and the VGA adjusts the gain to make the input signal of the ADC unsaturated. Therefore, to estimate the true signal amplitude of the antenna port, The adjustment values of VGA and RXATT need to be taken into account. In the preferred embodiment, when the base station receives a signal with a relatively large instantaneous amplitude change (for example, the UE moves in a high-speed environment), the RXATT adjustment gain value and the VGA adjustment gain value are inserted into the data for reporting, thereby ensuring that the calculated SNR is accurate. Timely. Preferably, before inserting the analog fixed gain value plus the RXATT adjustment gain value and the VGA adjustment gain value into the data, the method further includes: measuring an RRU radio frequency input from the to-be-reported gain factor to a delay value for inserting the analog gain value into the data; According to the delay value, the operation of inserting the RXATT adjustment gain value and the VGA adjustment gain value into the data is delayed, and the start judgment and the end judgment are added as the gain value extraction flag of the alignment adjustment data. In order to ensure that the corresponding relationship between the reported data and the gain is correct, in the preferred embodiment, the delay value measurement is performed, and the insertion of the RXATT adjustment gain value and the VGA adjustment gain value is delayed according to the delay value. In this way, it can be ensured that the inserted gain start position corresponds to the adjusted data, and the synchronization of the baseband received data and the gain factor is ensured. The invention simplifies the flow of the BBU calculating the antenna port SR, that is, the BBU calculation parameters need not be changed after the calibration with the reference RRU. All other RRUs do not need to be recalibrated, and are calibrated by reducing the gain difference. At the same time, the synchronization of the gain factor reporting and the received power variation is ensured, and the accuracy of the power control is improved. The implementation process of the embodiment of the present invention will be described in detail below with reference to examples. Including steps 1 through 3 < Step 1: The preferred embodiment of the present invention firstly scales an RRU as a reference and a BBU, and performs power statistics on the baseband side by adding a fixed signal source power to the antenna port, and the power decibel value (dbm value) input by the antenna port. A conversion factor is generated after conversion to the digital power value on the baseband side. In this way, for the digital power statistics received by each BBU, the dbm value of the corresponding antenna port can be obtained by the conversion coefficient. For example, if a single tone signal of -60 dbm is input to the RF port, we can test a digital value corresponding to the baseband BBU side, assuming that the data transmission bit width is 16 bits, and the baseband receiving digital power of -60 dbm is mdbFS. If the input power of the antenna port is Xdbm, the corresponding baseband digital power is (60+X+m) dbFS. Calculate the dimensionless digital power as 10*[ (60+X+A) +201g32768]/20, so that we have a calibration algorithm that can calculate the RRU antenna receiving port by the digital dimensionless power received by the baseband. Analog power. Step 2: According to the RF link design budget, ADC quantization, digital IF processing, and the reference RRU, the other models are compared and calculated. The comparison difference is uniformly converted into the analog gain and reported to the BBU through the gain factor. For example, for Model A RRU, calculate the difference in gain from the reference model RRU. The gain difference typically consists of three parts: RF link budget gain difference, ADC quantization gain difference, and digital link gain difference (including spread and DDC ( Digital Down Converter) The difference in gain caused by digital down conversion. FIG. 3 is a diagram showing the position of a three-part unit that brings gain to the RRU processing link according to a preferred embodiment of the present invention. Calculating the gain difference of the three parts relative to the reference calibration RRU, the difference can be normalized to the analog link db difference for unified reporting. For example, for Model A RRU, Link Analog Gain = Reference RRU Gain + RF Link Design Difference + ADC Receive Quantization Difference + Digital Processing Gain Difference. Further, the RF link budget design value (without VGA and RXATT RF devices not attenuating), for RRU Model A, the RF link gain difference is RF_dec. Further, ADC devices typically do not introduce gain, but the hardware link of the ADC device design can result in a different power scaling difference for the ADC module due to the difference in input power corresponding to its input full-scale. Gain conversion calculation at the receiving end of the ADC device: For the reference RRU, the corresponding ADC has a full-scale of 2Vp-p and an external resistance of 200 ohms.

At this time, the corresponding quantization of the ADC includes the peak-to-average ratio OdbFS, that is, the effective data of the ADC with a digital bit width of l lbits is a maximum value of 723, and the corresponding digital power is 723 ² = 522729. Thus, if the A model RRU, hardware design ADC input external resistance is X, then the corresponding full scale of the ADC can be calculated by 1-1, and the corresponding dBm value is 10 * log

, this is for

Further, the DDC link brings a gain change, which is mainly derived from the mixing filter and the bit width conversion. The ADC in l lbits is converted into 16-bit IQ (In-phase & Quadrature, in-phase and offset quarter) Cycle) data, which will bring about a gain change in the bit width extension. The bit width spread difference is calculated according to different extension bit width modes (if only the sign bit is extended, there is no gain difference, and a low bit complement 0 will bring the gain larger). Relative to the reference RRU, if the low bit of the A model RRU is extended by N bits, the gain is increased to 20*log2 ^N . When digital frequency shifting is performed, the reference RRU receives a complex signal whose ADC output sampling signal is 0 intermediate frequency. The ADC output of the A model RRU is a real signal of non-zero intermediate frequency, and there will be a gain difference after frequency shifting. Because the theoretical real signal is filtered after spectral shift filtering, it will cause 2 times gain loss. 4 is a schematic diagram of a post-spectrum spectrum of an ADC according to a preferred embodiment of the present invention, FIG. 5 is a schematic diagram of a spectrum after NCO migration according to a preferred embodiment of the present invention, and FIG. 6 is a diagram of a low-pass filtered spectrum according to a preferred embodiment of the present invention. The schematic diagram, as shown in Figures 4 through 6, shows the process of losing energy after fs/4 shift filtering. Further, by calculating the 3-part gain difference brought by the RRU design, it can be concluded that the gain difference of the A-type RRU relative to the reference calibration RRU is (-RF_dec-ADC_dec-20*log2 ^N -3db), The analog fixed gain GAIN0-RF_dec-ADC_dec-20*log2N -3db reported by the Model A RRU. Where GIN0 is the reference RRU analog gain budget value. Step 3: Measure the link delay value of the RRU RF input to the digital processing insertion gain factor module, and adjust the gain value according to the Variable Gain Amplifier (VGA) and the Receive Attenuator (RX Attenuator, RXATT for short). , after adding the analog gain, insert it into the current data for reporting. In order to keep the signal processed by the analog RF link part at a certain power level (the RF device works in a linear region, the link coupling noise is minimized, and the signal-to-noise ratio is optimal), the attenuation adjustment performed by RXATT is large for the antenna port input. The signal is attenuated and the small signal is amplified. The VGA adjustment gain makes the input signal of the ADC unsaturated, so to calculate the true signal amplitude received by the antenna port, it is necessary to take into account the dynamic gain adjustment values of VGA and RXATT. When the base station receives a signal with a relatively large instantaneous amplitude change (the UE moves in a high speed environment). RXATT and VGA are required to continuously report the real-time adjustment value to the gain factor for reporting, to ensure that the calculated signal-to-noise ratio is accurate and timely, and the adjustment value can be aligned with the adjusted data. The reported gain factor thus includes the RRU inherent analog gain + VGA + RXATT three parts, the conversion of the inherent analog gain has been described previously. The VGA and RXATT reports are updated in real time according to the adjusted accuracy, and the gain values adjusted by VGA and RXATT are inserted into the data to maintain synchronization with the data. After the VGA or RXATT adjustment, the adjusted data will arrive at the insertion point with a certain delay. The buffer value of the VGA or RXATT adjustment gain is obtained by measuring the delay, and the current received data is inserted into the buffer gain value for reporting. The simulation proves that the uplink signal IQ compression to 9bits transmission will not affect the demodulation of the signal. Therefore, the last lbit of 16bits~10bits data can be used as the gain factor. The current RRU gain range is not more than 110dbm, considering the control accuracy of 0.5. Db, 8bits can fully represent the gain factor. Therefore, a total of 8 data lengths are required to transfer the gain adjustment value of the corresponding data, and the 17 data required for the initial judgment and the end judgment can be transmitted. 7 is a schematic diagram of gain factor insertion data reporting in accordance with a preferred embodiment of the present invention, showing a transmission method using 15 bits of data + 1 bit gain factor. The first 8 bits of the first set of data are 8 pilots for monitoring the preamble sequence, followed by a gain factor of 8 data, followed by a data gain factor position filled with 0 to indicate the end. Further, in order to ensure that the corresponding relationship between the reported data and the gain is correct, a delay measurement is required. Make sure that the inserted gain start position corresponds to the adjusted data. Since the delay of the analog link is almost negligible, the main digital domain delay is obtained by the uplink delay measurement, and the delay value is expressed as Tuldel _a y. 8 is a diagram showing the insertion of data after the gain factor buffer Tuldelay is reported in accordance with a preferred embodiment of the present invention, showing the uplink delay values that need to be tested. This is done after each VGA or RXATT adjustment is completed. The adjustment gain buffer Tuldelay+VGA control generates a delay and then inserts it into the IQ for transmission to the baseband side for use, ensuring the synchronization of the VGA baseband receiving data and the gain factor. By doing this, it is not necessary to perform multiple calibrations on the BBU side for multiple models of RRUs. When calculating the power control parameters on the BBU side, only the calibration formula of the reference RRU can be used to correctly calculate the SR value. By inserting the gain factor of the real-time calculation into the data, the synchronization of the gain factor and the received signal power is guaranteed, and the real-time accuracy of the applied gain factor calculation SR is improved. It should be noted that the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein. The embodiment of the invention further provides a gain factor reporting device, which can be used to implement the above-mentioned gain factor reporting method. FIG. 9 is a structural block diagram of a gain factor reporting apparatus according to an embodiment of the present invention. As shown in FIG. 9, a comparison module 92, a determination module 94, and a reporting module 96 are included. The structure is described in detail below. The comparison module 92 is configured to compare the RRU of the gain factor to be reported with the RF link budget gain, the ADC quantization gain, and the digital link gain of the preset reference RRU; the determining module 94 is connected to the comparison module 92, and configured to The analog fixed gain value of the RRU of the gain factor to be reported is determined according to the gain difference value obtained by the comparison and the analog gain budget value of the reference RRU. The reporting module 96 is connected to the determining module 94 for reporting the analog fixed gain value. In the embodiment of the present invention, by normalizing the difference between different types of RRU hardware and link processing, the BBU does not need to identify the RRU type, and can accurately calculate the signal-to-noise ratio of the antenna port in real time according to a benchmark RRU calibration formula. 10 is a block diagram of a structure of a gain factor reporting apparatus according to a preferred embodiment of the present invention. As shown in FIG. 10, the gain factor reporting apparatus further includes a determining sub-module 942 for determining that the analog fixed gain value is equal to GAIN0 - RF. Dec - ADC dec - DDC dec - 3db, where GAIN0 is the analog gain budget value of the reference RRU, RF_dec is the gain difference of the compared RF link budget gain, and ADC_dec is the gain difference of the compared ADC quantization gain The value, DDC_dec, is the gain difference of the resulting digital link gain. In the preferred embodiment, the analog fixed gain value is directly calculated by GAIN0 - RF dec - ADC_dec - DDC_dec - 3db, and the calculation process is simple and reliable. 11 is a structural block diagram 3 of a gain factor reporting apparatus according to a preferred embodiment of the present invention. As shown in FIG. 11, the gain factor reporting apparatus further includes: an insertion sub-module 962 for adjusting the analog fixed gain value by adding VGA and RXATT dynamics. The gain value is inserted into the data; the reporting sub-module 964 is coupled to the insertion sub-module 962 for reporting the data inserted into the sub-module 962 after the fixed and dynamic gain additions. In the preferred embodiment, by inserting the real-time calculated gain factor into the data and reporting it, the synchronization of the gain factor and the received signal power variation is ensured, and the real-time accuracy of the applied gain factor calculation SR is improved. At the same time, considering that RXATT performs attenuation adjustment on the input signal of the antenna port, the input signal of the antenna port is amplified and adjusted, and the gain of the VGA adjusts the input signal of the ADC to be unsaturated. Therefore, it is estimated that the antenna signal receives the true signal amplitude. , you need to take into account the adjustment values of VGA and RXATT. In the preferred embodiment, when the base station receives a signal with a relatively large instantaneous amplitude change (for example, the UE moves in a high-speed environment), the RXATT adjustment gain value and the VGA adjustment gain value are inserted into the data for reporting, thereby ensuring that the calculated SNR is accurate. Timely. 12 is a block diagram of a structure of a gain factor reporting apparatus according to a preferred embodiment of the present invention. As shown in FIG. 12, the gain factor reporting apparatus further includes: a measurement sub-module 966, configured to measure an RRU radio frequency input from a gain factor to be reported to The analog fixed gain value is inserted into the delay value in the data; the delay sub-module 968 is connected to the measurement sub-module 966 for inserting the RXATT adjustment gain value and the VGA adjustment gain value together with the analog fixed gain according to the delay value, delay The operation in the data, plus the start judgment and the end judgment as the gain value extraction flag of the alignment adjustment data. In order to ensure that the corresponding relationship between the reported data and the gain is correct, in the preferred embodiment, the delay value measurement is performed, and the insertion of the RXATT adjustment gain value and the VGA adjustment gain value is delayed according to the delay value. In this way, it is ensured that the inserted gain start position corresponds to the adjusted data, and the synchronization of the VGA baseband received data and the gain factor is ensured. In summary, according to the above embodiments of the present invention, a gain factor reporting method and apparatus are provided. Through the present invention, different types of RRU hardware and link processing differences are normalized, and the problem of using different scaling coefficients for different RRUs in the related art is solved, and the BBU does not need to identify the RRU type, according to a reference RRU. The calibration formula can accurately calculate the signal-to-noise ratio of the antenna port in real time. It should be noted that the gain factor reporting device described in the device embodiment corresponds to the foregoing method embodiment, and the specific implementation process has been described in detail in the method embodiment, and details are not described herein again. INDUSTRIAL APPLICABILITY The technical solution of the present invention has industrial applicability, normalizes different RRU hardware and link processing differences, and solves the problem of using different scaling coefficients for different RRUs in related art, and thus the BBU does not need to be identified. The RRU type can accurately calculate the signal-to-noise ratio of the antenna port in real time according to a benchmark RRU calibration formula. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claims A method for reporting gain factors, including:

Comparing the RRU of the gain factor to be reported with the RF link budget gain, ADC quantization gain, and digital link gain of the preset reference RRU;

Determining, according to the compared gain difference value and the analog gain budget value of the reference RRU, an analog fixed gain value of the RRU of the to-be-reported gain factor;

The simulated fixed gain value is reported. The method according to claim 1, wherein determining the simulated fixed gain value of the RRU of the to-be-reported gain factor according to the compared gain difference value and the analog gain budget value of the reference RRU comprises: determining the analog fixed The gain value is equal to GAIN0 - RF dec - ADC_dec - DDC_dec, where GAIN0 is the analog gain budget value of the reference RRU, RF_dec is the gain difference of the compared RF link budget gain, and ADC_dec is the comparison of the ADC quantization gain The gain difference, DDC_dec, is the gain difference of the resulting digital link gain. The method according to claim 2, wherein, in the case where the full scale of the ADC corresponding to the reference RRU is 2Vp-p, and the external resistance of the reference RRU is 200 ohms,

ADC _ dec = {dBm) — 10 * log 10 where X

It is the RRU input external resistance of the to-be-reported gain factor. The method according to claim 2, wherein, in the case where the RRU of the to-be-reported gain factor is extended by N bits with respect to the lower order of the reference RRU, the gain loss caused by combining the non-zero intermediate frequency real-number filter down-conversion is DDC_dec =20*log2 ^N -3db. The method according to any one of claims 1 to 4, wherein reporting the simulated fixed gain value comprises:

Inserting the analog fixed gain value into the data;

The data after the insertion is reported.

6. The method of claim 5, wherein inserting the analog fixed gain value into the data comprises: inserting the analog fixed gain value plus an RXATT adjusted gain value and a VGA adjusted gain value into the data.

The method according to claim 6, wherein before inserting the analog fixed gain value plus the RXATT adjustment gain value and the VGA adjustment gain value into the data, the method further includes:

Measuring a delay value of the RRU radio frequency input from the to-be-reported gain factor to insert the analog fixed gain value into the data;

Based on the delay value, an operation of inserting the RXATT adjustment gain value and the VGA adjustment gain value into the data is delayed, and a start judgment and an end judgment are added as gain value extraction flags of the alignment adjustment data.

8. A gain factor reporting device, comprising:

a comparison module, configured to compare an RRU of the gain factor to be reported with a radio link budget gain, an ADC quantization gain, and a digital link gain of a preset reference RRU;

a determining module, configured to determine, according to the compared gain difference value and the analog gain budget value of the reference RRU, an analog fixed gain value of the RRU of the to-be-reported gain factor;

The reporting module is configured to report the simulated fixed gain value.

9. The apparatus according to claim 8, wherein the determining module comprises: a determining submodule, configured to determine that the analog fixed gain value is equal to GAIN0 - RF_dec - ADC_dec - DDC_dec , where GAIN0 is the reference RRU The analog gain budget value, RF_dec is the gain difference of the obtained RF link budget gain, ADC_dec is the gain difference of the compared ADC quantization gain, and DDC dec is the gain difference of the compared digital link gain.

10. The apparatus according to claim 9, wherein, when the full scale of the ADC corresponding to the reference RRU is 2Vp-p, and the external resistance of the reference RRU is 200 ohms,

Where X is the RRU input external resistance of the to-be-reported gain factor.