CN114430564B - Dynamic identification system and identification method for 5G communication center frequency point - Google Patents
Dynamic identification system and identification method for 5G communication center frequency point Download PDFInfo
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- CN114430564B CN114430564B CN202210354930.1A CN202210354930A CN114430564B CN 114430564 B CN114430564 B CN 114430564B CN 202210354930 A CN202210354930 A CN 202210354930A CN 114430564 B CN114430564 B CN 114430564B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H—ELECTRICITY
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Abstract
The invention discloses a dynamic identification system and an identification method for a 5G communication center frequency point, which relate to the technical field of 5G communication and comprise a configuration module, a scanning module, an iteration frequency sweeping module, a frequency point screening module and a frequency point transmission module; by applying the technical scheme provided by the invention, the technical problem that the accurate identification of the dynamic central frequency point is required to be realized on the radio remote unit RRU side is solved, when the baseband processing unit BBU can send the varying central frequency point according to the monitored interference in the process of communicating the private network baseband processing unit BBU and the radio remote unit RRU, the radio remote unit RRU can timely and accurately identify the central frequency points with different bandwidths, and the anti-interference performance and the communication effect of the communication between the private network baseband processing unit BBU and the radio remote unit RRU are enhanced.
Description
Technical Field
The invention relates to the technical field of 5G communication, in particular to application of dynamic identification of a communication center frequency point, and the position of the center frequency point is accurately identified when a baseband processing unit (BBU) and a Radio Remote Unit (RRU) communicate, so that smooth communication is ensured.
Background
In 5G communication, a central frequency point is used as a central broadband signal by interaction of a baseband processing unit BBU and a remote radio unit RRU, the central frequency point at the end of the remote radio unit RRU is a reference for radio frequency transmission and reception, and the central frequency point can be received only when the central frequency point is consistent with the central frequency point of the broadband signal transmitted by the baseband processing unit BBU.
In the application of a private network, the central frequency bands are specially used, the special frequency bands can be interfered by other signals in an actual test environment, and in order to reduce the influence caused by uncorrelated signal interference, broadband signals with changed central frequency points can be sent according to the monitored interference in private network 5G communication, so that the communication between a baseband processing unit (BBU) and a Radio Remote Unit (RRU) can achieve the optimal effect. Therefore, accurate identification of the dynamic center frequency point is also required to be achieved on the radio remote unit RRU side.
When the baseband processing unit BBU sends different central frequency points, the remote radio unit RRU needs to respond in time, the identification accuracy requirements of different bandwidths are different, and the remote radio unit RRU must be able to accurately identify the central frequency points under the condition of different bandwidths, so a method for dynamically identifying the central frequency points, which has strong real-time performance and high identification accuracy and changes along with the bandwidth of 5G signals, needs to be implemented on the remote radio unit RRU.
Disclosure of Invention
The invention aims to provide a method for accurately identifying a 5G communication dynamic central frequency point, wherein when a baseband processing unit (BBU) can send a changed central frequency point according to monitored interference in the process of communicating the BBU with a Radio Remote Unit (RRU), the RRU can timely and accurately identify the central frequency points with different bandwidths, and the anti-interference performance and the communication effect of communication between the BBU and the RRU in a private network are enhanced.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a dynamic identification system for a 5G communication center frequency point comprises:
a configuration module: controlling and triggering frequency point scanning initiation, configuring a radio frequency initial central frequency point and updating and configuring according to the screened frequency point;
the scanning module scans by taking an initial central frequency point as a center and taking half of the bandwidth as a radius, and the scanning precision is the bandwidth N1/N2M (unit, megahertz), wherein N1 is the bandwidth, N2 is the number of PRBs (unit is M); when a 100M bandwidth signal is scanned, the number of full physical resource blocks PRB is 273, and the scanning precision is 100/273= 0.36M;
an iteration frequency sweep module: in the data stream, 256 is taken as a sliding window, in each sliding window, a scanning module firstly carries out frequency point scanning on a first group of data, the obtained first group of results are brought into the scanning module, and the first group of results and a second group of data are carried out again to obtain two groups of results, and the same is repeated for the 256 th time, so that the iterative computation result of each window is obtained;
a frequency point screening module: selecting a central frequency point from the iteration calculation result according to 256 iteration power values corresponding to each physical resource block PRB under the condition that new frequency point scanning is not triggered, and if the new frequency point scanning is triggered, performing iteration calculation again and outputting a new central frequency point;
a frequency point transmission module: and transmitting the screened frequency points to a base band processing unit (BBU) for checking, and sending a scanning stopping command to a Radio Remote Unit (RRU) after the BBU checks correctly.
Further, the invention also provides an identification method based on the dynamic identification system for the 5G communication center frequency point, which comprises the following steps:
step one, initialization configuration: the configuration module sending the configuration information comprises: initial central frequency point configuration, frequency sweep switch, bandwidth antenna number, symbol number (symbol, 5G signal symbol value range: 0-13), Physical Resource Block PRB number (Physical Resource Block), and the like;
step two, calculating and scanning: after receiving configuration information sent by a configuration module, a scanning module triggers frequency band scanning calculation to start, determines the bandwidth and the number of PRBs (physical resource blocks), selects and calculates the power of the PRBs under which antenna number and symbol number are different according to the configuration information, and then sends the settlement result of each PRB to an iteration frequency sweeping module for continuous processing;
step three, iterative computation: after receiving the power of each physical resource block PRB sent by the scanning module, iterating the power of each physical resource block PRB by taking 256 as a sliding window, outputting an accurate result after iteration, and updating the accurate result to the frequency point screening module once every 13 ms;
step four, frequency point screening: when the frequency point screening module receives the accurate power values of all physical resource blocks PRB, judging whether a new scanning trigger instruction is received or not, and if the new scanning trigger instruction is received, returning to the calculation scanning module for calculation; if not, starting to compare the power corresponding to the maximum physical resource block PRB, calculating a corresponding frequency point offset value, and finally updating the central frequency point after scanning and screening and sending the central frequency point to a frequency point transmission module;
step five, uploading frequency points: and uploading the new central frequency point calculated by the frequency point screening module to a base band processing unit (BBU), if the correct BBU is checked, sending a frequency sweeping stopping instruction to the configuration module and triggering the end of frequency sweeping, and if not, restarting.
In the existing 5G communication technology, the central frequency point re-scanning and updating are not carried out in the communication process, and by applying the technical scheme provided by the invention, when the base band processing unit BBU can send and change the central frequency point according to the monitored interference in the communication process of the private network base band processing unit BBU and the remote radio unit RRU, the remote radio unit RRU can timely and accurately identify the central frequency points with different bandwidths, so that the anti-interference performance and the communication effect of the communication between the base band processing unit BBU and the remote radio unit RRU in the private network are enhanced.
Drawings
Fig. 1 is a schematic diagram of a system for dynamically identifying a 5G communication center frequency point in this embodiment.
Fig. 2 is a flowchart of a dynamic identification method for a 5G communication center frequency point in this embodiment.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
The following table defines the relevant registers of the iterative sweep frequency module
The iterative sweep module may change, read, and verify scan-related control parameters via registers in the table above.
sweet _ config _ data (scan control signal): there are 32 bits, wherein 31 th bit represents scanning start/end, 27 th-30 th bits represent the number of antennas, 16 th to 19 th bits are the number of symbols, and the rest are reserved. Current scan control information such as start/end, antenna number, symbol number is written through register address 0x1f 0. During the frequency sweep, the current frequency sweep information can be read through the address of 0x1f0, or new frequency sweep information can be reconfigured, and new results can be obtained by waiting for 130ms (millisecond) after each configuration.
Sweep _ data _ o (Sweep result output signal): this signal is used to read the power value of the corresponding PRB.
sweep _ prb _ num (sweep prb information): the signal is used for reading and writing frequency sweep prb information, fixed prb information can be specified, the frequency sweep central frequency point generally used for curve calculation is pre-verified whether to be correct on the RRU side, and whether the power value of the position of the central frequency point is the maximum value can be reversely verified through comparing with surrounding points.
Referring to fig. 1, the present embodiment provides a dynamic identification system for a 5G communication center frequency point, which includes a configuration module, a scanning module, an iterative frequency sweeping module, a frequency point screening module, and a frequency point transmission module.
A configuration module: controlling and triggering frequency point scanning initiation, configuring a radio frequency initial central frequency point and updating and configuring according to the screened frequency point;
the scanning module scans by taking an initial central frequency point as a center and taking half of the bandwidth as a radius, wherein the scanning precision is the bandwidth N1/N2(M), N1 is the bandwidth, N2 is the number of PRBs (total physical resource blocks), and the unit is M; taking a 100M bandwidth signal 273PRB as an example, the scanning step is 100/273M;
an iteration frequency sweep module: carrying out iterative computation on the frequency point scanning result in the scanning module by taking 256 as a sliding window in the data stream to obtain an iterative computation result of each window;
a frequency point screening module: selecting a central frequency point from the results of iterative calculation under the condition that new frequency point scanning is not triggered, and if the new frequency point scanning is triggered, carrying out iterative calculation again and outputting a new central frequency point;
a frequency point transmission module: and transmitting the screened frequency points to a base band processing unit (BBU) for checking, and sending a scanning stopping command to a Radio Remote Unit (RRU) after the BBU checks correctly.
Referring to fig. 2, the method for dynamically identifying a center frequency point in 5G communication provided by this embodiment includes the following steps:
a. initialization configuration, wherein the configuration module sends configuration information and comprises the following steps: the method comprises the following steps of initial central frequency point configuration, frequency sweep switches, bandwidth antenna numbers, symbol numbers, physical resource block PRB numbers and the like;
b, calculating and scanning, namely triggering frequency band scanning calculation to start after the scanning module receives the configuration information sent by the configuration module, determining the bandwidth and the number of PRBs (physical resource blocks), selecting and calculating the power of the PRBs under which antenna number and symbol number are different according to the configuration information, and then sending the settlement result of each PRB to the iteration frequency sweeping module for continuous processing;
c. iteration calculation, namely after receiving the power of each physical resource block PRB sent by the scanning module, iterating the power of each physical resource block PRB by taking 256 as a sliding window, outputting an accurate result after iteration, and updating the accurate result once every 13ms to the frequency point screening module;
d. the method comprises the steps of frequency point screening, wherein when a frequency point screening module receives accurate power values of all physical resource blocks PRB, whether a new scanning trigger instruction is received or not is judged, if a new scanning trigger is received, the new scanning trigger instruction is returned to a calculation scanning module for calculation, if no new scanning trigger is received, the power corresponding to the physical resource block PRB with the maximum power is compared, the corresponding frequency point deviation value is calculated, and finally, the center frequency point after scanning screening is updated and sent to a frequency point transmission module;
e. and uploading the new central frequency point calculated by the frequency point screening module to a baseband processing unit (BBU), waiting for the BBU to check and confirm, and if the BBU checks correctly, sending a frequency sweeping stopping instruction to the configuration module and triggering the frequency sweeping to be finished, otherwise, restarting.
In the process of communication between the private network baseband processing unit BBU and the RRU, when the baseband processing unit BBU can send and change the central frequency point according to the monitored interference, the RRU can identify the central frequency points with different bandwidths timely and accurately, so that the anti-interference performance and the communication effect of the communication between the private network baseband processing unit BBU and the RRU are enhanced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.
Claims (4)
1. A dynamic identification system for a 5G communication center frequency point is characterized in that: comprises that
A configuration module: controlling the start and stop of frequency point scanning, configuring a radio frequency initial central frequency point, and selecting whether to update a scanned new frequency point according to instruction information;
a scanning module: scanning by taking a radio frequency initial central frequency point as a center and taking half of a bandwidth as a radius, wherein the scanning precision is N1/N2, N1 is the bandwidth, N2 is the total number of PRBs (physical resource blocks), and the scanning precision and the bandwidth unit are both megaM;
an iteration frequency sweep module: in the data stream, 256 is taken as a sliding window, in each sliding window, a scanning module firstly carries out frequency point scanning on a first group of data, the obtained first group of results are brought into the scanning module, and the first group of results and a second group of data are carried out frequency point scanning again to obtain two groups of results, and the rest is repeated for 256 times to obtain the iterative computation result of each window;
a frequency point screening module: selecting a central frequency point from the iteration calculation result according to 256 iteration power values corresponding to each physical resource block PRB under the condition that new frequency point scanning is not triggered, and if the new frequency point scanning is triggered, performing iteration calculation again and outputting a new central frequency point;
a frequency point transmission module: and transmitting the screened central frequency points to a base band processing unit (BBU) for checking, and sending a scanning stopping command to a Radio Remote Unit (RRU) after the BBU checks correctly.
2. The dynamic identification system for the 5G communication center frequency point according to claim 1, characterized in that: the configuration module sends configuration information from a baseband processing unit (BBU) to a scanning module, the scanning module selects power of different Physical Resource Blocks (PRB) under an antenna and a symbol to be calculated according to the received configuration information, the calculation result of each physical resource block PRB is sent to an iteration frequency sweeping module, the iteration frequency sweeping module iterates the received result to obtain an accurate result and updates the accurate result to a frequency point screening module every 13ms, the frequency point screening module judges whether to continue frequency sweeping or send the updated central frequency point to the BBU for checking according to the state of a frequency sweeping switch in the configuration module, if the frequency sweeping switch is 1, scanning is continued, if the frequency sweeping switch is 0, the central frequency point is updated to the BBU, and if the frequency sweeping switch is correctly checked after the BBU receives the frequency sweeping switch, a closing instruction is sent, so that the dynamic identification of the frequency point of the 5G communication center is realized.
3. The dynamic identification system for 5G communication center frequency points according to claim 2, characterized in that: the configuration information comprises initial central frequency point configuration, a frequency sweeping switch, a bandwidth antenna number, a symbol and physical resource block PRB number.
4. An identification method for a dynamic identification system of 5G communication center frequency points based on any one of claims 1 to 3, characterized by comprising the following steps:
step one, initialization configuration: the configuration module sends configuration information from a baseband processing unit (BBU) to the scanning module; the configuration information includes: the method comprises the steps of initial central frequency point configuration, a frequency sweeping switch, a bandwidth antenna number, a symbol number and a physical resource block PRB number;
step two, calculating and scanning: after receiving the configuration information, the scanning module triggers frequency band scanning calculation to start, determines the bandwidth and the total physical resource block PRB number according to the configuration information, selects and calculates which antenna number and the power of different physical resource blocks PRB under the symbol number, and then sends the settlement result of each physical resource block PRB to the iteration frequency sweeping module for continuous processing;
step three, iterative computation: after receiving the power of each physical resource block PRB sent by the scanning module, iterating the power of each physical resource block PRB by taking 256 as a sliding window, outputting an accurate result after iteration, and updating the accurate result to the frequency point screening module once every 13 ms;
step four, frequency point screening: when the frequency point screening module receives the accurate power values of all physical resource blocks PRB, judging whether a new scanning trigger instruction is received or not, and if a new scanning trigger instruction is received, returning to the calculation scanning module for calculation; if not, starting to compare the power corresponding to the maximum physical resource block PRB to obtain the Nth physical resource block PRB corresponding to the maximum power, then using N (N1/N2) + P, wherein N is the number of the physical resource blocks PRB corresponding to the maximum power, N1 is the bandwidth, N2 is the total number of the physical resource blocks PRB, P is an initial central frequency point, calculating a corresponding new frequency point value, and finally updating the central frequency point after scanning and screening and sending the new frequency point value to a frequency point transmission module;
step five, frequency point uploading: and uploading the new central frequency point calculated by the frequency point screening module to a baseband processing unit (BBU) and waiting for the BBU to check and confirm.
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Inventor after: Huang Chuan Inventor after: Xu Jie Inventor before: Huang Chuan Inventor before: He Yujun Inventor before: Zhang Hongze Inventor before: Xu Jie |