CN117440490B - Method and system for adaptively adjusting downlink power of O-RU - Google Patents
Method and system for adaptively adjusting downlink power of O-RU Download PDFInfo
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Abstract
The invention provides a method and a system for adaptively adjusting downlink power of an O-RU, comprising the following steps: according to the downlink carrier information issued by the O-DU equipment, calculating the expected power value of each carrier of each antenna as a downlink power detection threshold of the corresponding carrier; carrying out symbol-level power statistics on downlink baseband IQ data, comparing the downlink baseband IQ data with a downlink power detection threshold, generating a power abnormality indication according to a comparison result, and calculating a corresponding power adjustment factor; and according to the power abnormality indication, performing power adjustment on the corresponding symbol data by using the corresponding power adjustment factor. The invention can effectively avoid the result of hardware burnout caused by the abnormal baseband signal flowing into the back-stage module, and effectively improves the reliability of the whole radio frequency unit.
Description
Technical Field
The present invention relates to the field of radio access networks, and in particular, to a method and a system for adaptively adjusting downlink power of an O-RU.
Background
An (Open Radio Access Network ) is an open radio access network technology intended to transform the traditional closed radio access network architecture. Conventional base station vendors can only connect with their own RU (wireless unit) through proprietary forward protocols. The object of the ora is to implement interworking between DUs of different manufacturers and RUs of different manufacturers through standardized interfaces and protocols, thereby reducing the cost of the whole network. The key to heterogeneous interconnection is the standardization and normalization of the interfaces so that the O-DUs (distributed units under the ora) and the O-RUs (wireless units under the ora) can be normally connected.
For the ORAN system, the O-DU normalizes the power of each symbol of the downlink baseband IQ signal, then performs data compression through a block floating point compression technology, and then transmits the compressed 9bit IQ data and 4bit index to the O-RU through an ORAN protocol user plane message. On the O-RU, the baseband signal can be restored by using 4bits exponent and IQ data through a decompression protocol of block floating point. However, different O-DU manufacturers may differ in the definition of the index and the power scaling, and if the O-DU and the O-RU are not negotiated in the scaling, the RU decompressed data may cause power and spectrum anomalies, which may cause the RU post-digital signal processing module to overflow, thereby jeopardizing the whole radio frequency system. In addition, unstable fronthaul interfaces may also cause IQ or exponential signal anomalies, with similar consequences.
Disclosure of Invention
Aiming at the problems in the prior art, the self-adaptive adjustment method and the self-adaptive adjustment system for the downlink power of the O-RU are provided, and abnormal symbol data can be automatically identified and power adjustment can be performed.
The first aspect of the present invention provides a method for adaptively adjusting downlink power of an O-RU, including:
according to the downlink carrier information issued by the O-DU equipment, calculating the expected power value of each carrier of each antenna as a downlink power detection threshold of the corresponding carrier;
carrying out symbol-level power statistics on downlink baseband IQ data, comparing the downlink baseband IQ data with a downlink power detection threshold, generating a power abnormality indication according to a comparison result, and calculating a corresponding power adjustment factor;
and according to the power abnormality indication, performing power adjustment on the corresponding symbol data by using the corresponding power adjustment factor.
Further, the downlink power detection threshold obtaining method comprises the following steps: after the carrier information is acquired, calculating the maximum rated power through the bandwidth, and taking the maximum rated power as a corresponding carrier downlink power detection threshold.
Further, the power adjustment factor obtaining method comprises the following steps:
calculating the frequency domain power of each symbol by using the downlink baseband IQ data;
comparing each symbol frequency domain power with a corresponding carrier downlink power detection threshold respectively;
if the symbol frequency domain power is greater than the downlink power detection threshold, setting the power abnormality indication to be 1, and calculating a power adjustment factor by combining the symbol frequency domain power and the corresponding carrier downlink power detection threshold; if the symbol frequency domain is less than or equal to the downlink power detection threshold, setting the power abnormality indication to 0 and setting the power adjustment factor to 1.
Further, the method for calculating the power adjustment factor by combining the symbol frequency domain power and the corresponding carrier downlink power detection threshold comprises the following steps:
wherein,the mth antenna is in the nth carrierlPower adjustment factor for each symbol,/>A downlink power detection threshold for the nth carrier,/->Is the mth antenna in the nth carrierlAnd the frequency domain power of each symbol.
Further, after calculating the power adjustment factor, recording the current antenna number, carrier number and symbol index, and establishing a lookup table composed of address, power abnormality indication and power adjustment factor fields for transmitting and storing the power adjustment factor; wherein the lookup table is divided into two blocks, and is established by combining symbol indexes and a ping-pong mechanism, wherein one block stores even symbol information and the other block stores odd symbol information; the address consists of ping-pong indication, antenna number, carrier number.
Further, the specific process of the power adjustment is as follows:
after receiving one symbol data, acquiring a power abnormality indication of the symbol, and if the power abnormality indication is 0, directly performing power adjustment according to the power adjustment factor of 1; and if the power abnormality indication is 1, acquiring a corresponding power adjustment factor by using a lookup table to perform power adjustment.
The second aspect of the present invention provides a downlink power adaptive adjustment system of an O-RU, which is disposed in a downlink data signal processing module of the O-RU device, and includes a symbol power detection module, a look-up table module, and a power adjustment module;
the symbol power detection module is used for acquiring the symbol of each antenna carrier wave entering the IFFT module, judging whether the power of the corresponding symbol is abnormal, calculating a corresponding power adjustment factor after generating a power abnormality indication, and sending the antenna number, the carrier wave number, the symbol index, the power abnormality indication and the power adjustment factor to the lookup table module; transmitting power abnormality indication corresponding to each symbol to a power adjustment module;
the lookup table module is used for establishing a lookup table by combining the symbol index and the ping-pong mechanism, wherein the lookup table is divided into two blocks, one block stores even symbol information, and the other block stores odd symbol information; the lookup table comprises an address, a power abnormality indication and a power adjustment factor field, wherein the address consists of a ping-pong indication, an antenna number and a carrier number.
And the power adjustment module is used for acquiring the symbol output by the IFFT module, acquiring a power adjustment factor according to the corresponding power abnormality indication and adjusting the power of the symbol data.
Further, in the symbol power detection module, the process of calculating the corresponding power adjustment factor after generating the power abnormality indication includes:
calculating the frequency domain power of each symbol;
comparing each symbol frequency domain power with a corresponding carrier downlink power detection threshold respectively;
if the symbol frequency domain power is greater than the downlink power detection threshold, setting the power abnormality indication to be 1, and calculating a power adjustment factor by combining the symbol frequency domain power and the corresponding carrier downlink power detection threshold; if the symbol frequency domain is less than or equal to the downlink power detection threshold, setting the power abnormality indication to 0 and setting the power adjustment factor to 1.
Further, in the symbol power detection module, the method for calculating the power adjustment factor by combining the symbol frequency domain power and the corresponding carrier downlink power detection threshold comprises the following steps:
wherein,the mth antenna is in the nth carrierlPower adjustment factor for each symbol,/>A downlink power detection threshold for the nth carrier,/->Is the mth antenna in the nth carrierlAnd the frequency domain power of each symbol.
Further, in the power adjustment module, after the power abnormality indication of the symbol is obtained, if the power abnormality indication is 0, power adjustment is directly performed according to the power adjustment factor of 1; and if the power abnormality indication is 1, acquiring a corresponding power adjustment factor by using a lookup table to perform power adjustment.
Compared with the prior art, the beneficial effects of adopting the technical scheme are as follows: the invention can effectively avoid the result of hardware burnout caused by the abnormal baseband signal flowing into the back-stage module, and effectively improves the reliability of the whole radio frequency unit.
Drawings
Fig. 1 is a schematic diagram of a conventional downlink signal processing flow.
Fig. 2 is a flowchart of a downlink power adaptive adjustment method according to the present invention.
Fig. 3 is a schematic diagram of a downlink power adaptive adjustment system according to an embodiment of the invention.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar modules or modules having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the present application include all alternatives, modifications, and equivalents as may be included within the spirit and scope of the appended claims.
Example 1
According to the ora 7-2 protocol, the O-DU transmits the frequency domain data of each OFDM symbol to the O-RU, which converts the frequency domain data into time domain data through IFFT transformation and then transmits it through subsequent digital signal processing (as shown in fig. 1). Under some abnormal conditions, such as mismatching of the O-DU power setting and the O-RU, or abnormal occurrence of a forward protocol stack, the O-RU digital domain is excessively powered, and after passing through a subsequent digital signal processing module, the digital domain overflows, so that risks are generated for the radio frequency system. Therefore, the problem that abnormal data possibly exists in the downlink signal processing flow in the existing O-RU equipment to cause overflow of the RU post-stage digital signal processing module and further damage the whole radio frequency system is solved. The embodiment of the invention provides a symbol-level downlink power self-adaptive adjustment method suitable for O-RU equipment. The specific scheme is as follows:
referring to fig. 2, the method for adaptively adjusting the downlink power of the O-RU includes:
step S1, according to downlink carrier information issued by the O-DU equipment, calculating the expected power value of each carrier of each antenna as a downlink power detection threshold of the corresponding carrier.
According to the 3GPP protocol, after the carrier information is acquired, the maximum rated power is calculated through the bandwidth by the software, and then the maximum rated power is configured into the system to be used as the downlink power detection threshold of the corresponding carrier.
And S2, carrying out symbol-level power statistics on the downlink baseband IQ data, comparing the symbol-level power statistics with a downlink power detection threshold, generating a power abnormality indication according to a comparison result, and calculating a corresponding power adjustment factor.
After passing through the ORAN protocol stack, the downlink baseband data enters an IFFT module for time-frequency conversion in a symbol unit. In this embodiment, the frequency domain power of each symbol is calculated by using the downlink baseband IQ data, and the calculation formula is as follows:
wherein,is->Root antenna->First->Power of individual symbols>Is->Root antenna->First->First->Frequency domain data of sub-carrier,/->Is the number of frequency domain subcarriers.
After the symbol frequency domain power is calculated, the symbol frequency domain power is compared with a downlink power detection threshold of a corresponding carrier. The specific comparison is as follows:
wherein,and the downlink power detection threshold corresponding to the nth carrier is used.
If the symbol frequency domain power is larger than the downlink power detection threshold, the symbol power is excessively large, the power abnormality indication is set to be 1, and a power adjustment factor is calculated by combining the symbol frequency domain power and the corresponding carrier downlink power detection threshold; if the symbol frequency domain is less than or equal to the downlink power detection threshold, the symbol power is normal, the power abnormality indication is set to 0, and the power adjustment factor is set to 1. The power adjustment factor is calculated as follows:
in order to realize the storage and transmission of the power adjustment factor, in this embodiment, after the power adjustment factor is calculated, the current antenna number, carrier number and symbol index are recorded, and a lookup table composed of address, power abnormality indication and power adjustment factor fields is established for the transmission and storage of the power adjustment factor. The details are shown in table 1 below.
Table 1 look-up table
Referring to the above table, in order to improve the efficiency of the lookup table, the lookup table is divided into two blocks, and the block 0 stores the information of even symbols and the information of odd symbols by combining the symbol index and the ping-pong mechanism, so that the simultaneous storage of the information of all symbols (280 symbols) can be avoided, and the design of the lookup table is greatly simplified. Meanwhile, as the power anomaly detection is input in the IFFT module, the power adjustment is output in the IFFT module, the processing time delay of the IFFT module is within 1 symbol period, the read-write collision can be effectively avoided through a ping-pong mechanism, and the correctness of the stored information is ensured.
In this embodiment, the lookup table address is composed of a 1bit ping-pong indication, a 2bits antenna number, and a 3bits carrier number, and G corresponding to all antenna carriers of each symbol may be stored. The data of the lookup table consists of a 1bit power anomaly indication and a 16bit power adjustment factor G. If the current symbol has antenna carrier power abnormality, the power adjustment factor G needs to be stored in the storage space, and the corresponding power abnormality indication is set to be 1. For a normal antenna carrier, the power abnormality indicator is set to 0 and the power adjustment factor is 1.
And step S3, according to the power abnormality indication, performing power adjustment on the corresponding symbol data by using the corresponding power adjustment factor.
The power adjustment process is performed on the symbol data output by the IFFT module, and in one embodiment, each symbol output by the IFFT module may be power adjusted by a set of complex multipliers. To avoid querying the look-up table for all antenna carrier power adjustment factors per symbol, a power anomaly indication may be obtained in advance to determine whether to perform the look-up procedure. Specific:
after acquiring the power abnormality indication of the current symbol, if the power abnormality indication is 0, indicating that the current symbol has no power abnormality, and directly performing power adjustment according to the power adjustment factor of 1 without inquiring the power adjustment factor, namely, keeping the power unchanged; if the power abnormality indication is 1, the current symbol has power abnormality on the antenna carrier, and at this time, the corresponding power adjustment factor is obtained by using the lookup table to perform power adjustment. By the method, the query efficiency can be greatly improved.
It should be noted that, in practical applications, the steps 1, 2, and 3 are not completely performed in sequence, and it is also possible to perform or exchange part of the step sequences in parallel according to practical requirements.
The downlink power self-adaptive adjustment method provided by the embodiment can effectively avoid the problem that abnormal baseband signals flow into a later-stage module to cause the burning of hardware, and effectively improves the reliability of the whole radio frequency unit.
Example 2
Referring to fig. 3, the present embodiment provides a downlink power adaptive adjustment system of an O-RU, which is disposed in a downlink data signal processing module of the O-RU device, and includes a symbol power detection module, a look-up table module, and a power adjustment module; wherein,
the symbol power detection module is used for acquiring the symbol of each antenna carrier wave entering the IFFT module, judging whether the power of the corresponding symbol is abnormal, calculating a corresponding power adjustment factor after generating a power abnormality indication, and sending the antenna number, the carrier wave number, the symbol index, the power abnormality indication and the power adjustment factor to the lookup table module; transmitting power abnormality indication corresponding to each symbol to a power adjustment module;
the lookup table module is used for establishing a lookup table by combining the symbol index and the ping-pong mechanism, wherein the lookup table is divided into two blocks, one block stores even symbol information, and the other block stores odd symbol information; the lookup table comprises an address, a power abnormality indication and a power adjustment factor field, wherein the address consists of a ping-pong indication, an antenna number and a carrier number.
And the power adjustment module is used for acquiring the symbol output by the IFFT module, acquiring a power adjustment factor according to the corresponding power abnormality indication and adjusting the power of the symbol data.
It should be noted that referring to fig. 3, a data mapping module, a phase compensation module, a CP inserting module, a digital up-conversion module, and a peak clipping/predistortion module are also shown in the downstream data processing module, but the detailed description is omitted herein because the partial modules are all existing modules. And according to the characteristics of O-RU digital signal processing, performing symbol-level power detection on the data of each carrier wave entering each antenna of the IFFT module, generating a corresponding power adjustment factor, and storing the corresponding power adjustment factor into a corresponding lookup table. The frequency domain data of each symbol is transformed into 4096-point time domain data through an IFFT module, then gain adjustment is carried out through a gain adjustment module, the power of an abnormal symbol can be adjusted to a normal value, and then the abnormal symbol enters a radio frequency system through subsequent insertion of CP, digital up-conversion, peak clipping and digital predistortion.
In the symbol power detection module:
after passing through the ORAN protocol stack, the downlink baseband data enters an IFFT module for time-frequency conversion in a symbol unit. In this embodiment, the frequency domain power of each symbol is calculated by using the downlink baseband IQ data, and the calculation formula is as follows:
wherein,is->Root antenna->First->Power of individual symbols>Is->Root antenna->First->First->Frequency domain data of sub-carrier,/->Is the number of frequency domain subcarriers.
After the symbol frequency domain power is calculated, the symbol frequency domain power is compared with a downlink power detection threshold of a corresponding carrier. The specific comparison is as follows:
wherein,and the downlink power detection threshold corresponding to the nth carrier is used.
If the symbol frequency domain power is greater than the downlink power detection threshold, indicating that the symbol power is too large, setting the power abnormality indication to 1, and calculating a power adjustment factor by combining the symbol frequency domain power and the corresponding carrier downlink power detection thresholdThe method comprises the steps of carrying out a first treatment on the surface of the If the symbol frequency domain is less than or equal to the downlink power detection threshold, the symbol power is normal, the power abnormality indication is set to 0, and the power adjustment factor is set to 1.
In the lookup table module, the lookup table may be established using the method set forth in embodiment 1.
In order to avoid the efficiency reduction caused by the fact that each symbol inquires the power adjustment factors of all antenna carriers of the lookup table, in a power adjustment module, acquiring a power abnormality indication transmitted by a symbol power detection module, judging the power abnormality indication, and if the power abnormality indication is 0, directly adjusting the power according to the power adjustment factor of 1; and if the power abnormality indication is 1, acquiring a corresponding power adjustment factor by using a lookup table to perform power adjustment.
In particular, according to embodiment 1 of the present application, the described process may be implemented as a computer software program. For example, embodiments of the present application include a computer program product comprising a computer program loaded on a computer readable medium. In such embodiments, the computer program may be downloaded and installed from a network via a communication portion, and/or installed from a removable medium. When executed by a Central Processing Unit (CPU), performs the various functions defined in the present application.
It should be noted that, the computer readable medium shown in the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-Only Memory (ROM), an erasable programmable read-Only Memory (Erasable Programmable Read Only Memory, EPROM), flash Memory, an optical fiber, a portable compact disc read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present application, however, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. Where each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units involved in the embodiments of the present application may be implemented by means of software, or may be implemented by means of hardware, and the described units may also be provided in a processor. Wherein the names of the units do not constitute a limitation of the units themselves in some cases.
As another aspect, the present application also provides a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the method for adaptively adjusting the downlink power of the O-RU described in the above embodiment.
As another aspect, the present application also provides a computer-readable medium that may be contained in the electronic device described in the above embodiment; or may exist alone without being incorporated into the electronic device. The computer readable medium carries one or more programs, which when executed by one of the electronic devices, cause the electronic device to implement the method for adaptively adjusting the downlink power of the O-RU described in the foregoing embodiments.
It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functions of two or more modules or units described above may be embodied in one module or unit, in accordance with embodiments of the present application. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.
The specific meaning of the above terms in the present invention will be understood in detail by those skilled in the art; the accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (6)
1. The downlink power self-adaptive adjustment method of the O-RU is characterized by comprising the following steps of:
according to the downlink carrier information issued by the O-DU equipment, calculating the expected power value of each carrier of each antenna as a downlink power detection threshold of the corresponding carrier;
carrying out symbol-level power statistics on downlink baseband IQ data, comparing the downlink baseband IQ data with a downlink power detection threshold, generating a power abnormality indication according to a comparison result, and calculating a corresponding power adjustment factor;
according to the power abnormality indication, performing power adjustment on the corresponding symbol data by using the corresponding power adjustment factor;
the power adjustment factor acquisition method comprises the following steps:
calculating the frequency domain power of each symbol by using the downlink baseband IQ data;
comparing each symbol frequency domain power with a corresponding carrier downlink power detection threshold respectively;
if the symbol frequency domain power is greater than the downlink power detection threshold, setting the power abnormality indication to be 1, and calculating a power adjustment factor by combining the symbol frequency domain power and the corresponding carrier downlink power detection threshold; if the symbol frequency domain is less than or equal to the downlink power detection threshold, setting the power abnormality indication to 0 and setting the power adjustment factor to 1;
after calculating the power adjustment factor, recording the current antenna number, carrier number and symbol index, and establishing a lookup table composed of address, power abnormality indication and power adjustment factor field for transmitting and storing the power adjustment factor;
the specific process of the power adjustment is as follows:
after receiving one symbol data, acquiring a power abnormality indication of the symbol, and if the power abnormality indication is 0, directly performing power adjustment according to the power adjustment factor of 1; and if the power abnormality indication is 1, acquiring a corresponding power adjustment factor by using a lookup table to perform power adjustment.
2. The method for adaptively adjusting the downlink power of the O-RU of claim 1, wherein the method for obtaining the downlink power detection threshold is: after the carrier information is acquired, calculating the maximum rated power through the bandwidth, and taking the maximum rated power as a corresponding carrier downlink power detection threshold.
3. The method for adaptively adjusting the downlink power of an O-RU according to claim 1, wherein the method for calculating the power adjustment factor by combining the symbol frequency domain power and the corresponding carrier downlink power detection threshold is:
wherein,the mth antenna is in the nth carrierlPower adjustment factor for each symbol,/>A downlink power detection threshold for the nth carrier,/->Is the mth antenna in the nth carrierlAnd the frequency domain power of each symbol.
4. The method for adaptively adjusting the downlink power of an O-RU of claim 1, wherein the look-up table is divided into two blocks, and is built by combining a symbol index and a ping-pong mechanism, one block storing even symbol information and the other block storing odd symbol information; the address consists of ping-pong indication, antenna number, carrier number.
5. The downlink power self-adaptive adjustment system of the O-RU is characterized by being arranged in a downlink data signal processing module of O-RU equipment and comprising a symbol power detection module, a lookup table module and a power adjustment module;
the symbol power detection module is used for acquiring the symbol of each antenna carrier wave entering the IFFT module, judging whether the power of the corresponding symbol is abnormal, calculating a corresponding power adjustment factor after generating a power abnormality indication, and sending the antenna number, the carrier wave number, the symbol index, the power abnormality indication and the power adjustment factor to the lookup table module; transmitting power abnormality indication corresponding to each symbol to a power adjustment module;
the lookup table module is used for establishing a lookup table by combining the symbol index and the ping-pong mechanism, wherein the lookup table is divided into two blocks, one block stores even symbol information, and the other block stores odd symbol information; the lookup table comprises an address, a power abnormality indication and a power adjustment factor field, wherein the address consists of a ping-pong indication, an antenna number and a carrier number;
the power adjustment module is used for acquiring the symbol output by the IFFT module, acquiring a power adjustment factor according to the corresponding power abnormality indication and adjusting the power of the symbol data;
in the symbol power detection module, the process of calculating the corresponding power adjustment factor after generating the power abnormality indication includes:
calculating the frequency domain power of each symbol;
comparing each symbol frequency domain power with a corresponding carrier downlink power detection threshold respectively;
if the symbol frequency domain power is greater than the downlink power detection threshold, setting the power abnormality indication to be 1, and calculating a power adjustment factor by combining the symbol frequency domain power and the corresponding carrier downlink power detection threshold; if the symbol frequency domain is less than or equal to the downlink power detection threshold, setting the power abnormality indication to 0 and setting the power adjustment factor to 1;
in the power adjustment module, after the power abnormality indication of the symbol is obtained, if the power abnormality indication is 0, directly performing power adjustment according to the power adjustment factor of 1; and if the power abnormality indication is 1, acquiring a corresponding power adjustment factor by using a lookup table to perform power adjustment.
6. The system for adaptively adjusting the downlink power of an O-RU of claim 5, wherein the method for calculating the power adjustment factor by combining the symbol frequency domain power with the corresponding carrier downlink power detection threshold in the symbol power detection module comprises:
wherein,the mth antenna is in the nth carrierlPower adjustment factor for each symbol,/>A downlink power detection threshold for the nth carrier,/->Is the mth antenna in the nth carrierlAnd the frequency domain power of each symbol.
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