CN-122027049-A - Antenna fault detection method, device, equipment and storage medium based on MIMO system

CN122027049ACN 122027049 ACN122027049 ACN 122027049ACN-122027049-A

Abstract

The embodiment of the application provides an antenna fault detection method, device, equipment and storage medium based on a MIMO system, wherein the method comprises the steps of obtaining channel state information and an actual demodulation performance index of user equipment from a data link layer of the MIMO system; the method comprises the steps of predicting a theoretical demodulation performance index according to channel state information, comparing the theoretical demodulation performance index with an actual demodulation performance index, determining a suspected fault antenna according to the signal energy value of each antenna in an antenna array if the theoretical demodulation performance index is inconsistent with the actual demodulation performance index, shielding the suspected fault antenna, determining whether the suspected fault antenna is an actual fault antenna according to the actual performance data of a shielded MIMO system, and realizing the combination of quick sensing and accurate judgment through the joint identification of the link layer index and the signal energy value of the antenna, thereby effectively distinguishing instantaneous channel fluctuation from permanent and semi-permanent hardware faults and obviously reducing the misjudgment and missed judgment probability of the fault antenna.

Inventors

WANG BO
ZHU TAO
ZHOU JIANFENG
TANG YUNMIN

Assignees

西安邵朗科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260113

Claims (10)

1. An antenna fault detection method based on a MIMO system, comprising: acquiring channel state information and an actual demodulation performance index of user equipment from a data link layer of the MIMO system; predicting theoretical demodulation performance indexes according to channel state information, and comparing the theoretical demodulation performance indexes with actual demodulation performance indexes; under the condition that the theoretical demodulation performance index is inconsistent with the actual demodulation performance index, acquiring a signal energy value of each antenna in the antenna array, and determining a suspected fault antenna according to the signal energy value; and shielding the suspected fault antenna, acquiring actual performance data of the shielded MIMO system, and determining whether the suspected fault antenna is an actual fault antenna according to the actual performance data.
2. The method of claim 1, wherein predicting theoretical demodulation performance metrics based on channel state information comprises: for each channel, determining the effective signal-to-interference-and-noise ratio of the current channel according to the channel state information of the current channel, and acquiring a modulation and coding strategy; and determining a theoretical block error rate according to the effective signal-to-interference-and-noise ratio of the current channel and a modulation and coding strategy, and taking the theoretical block error rate as a theoretical demodulation performance index.
3. The method of claim 1, wherein comparing the theoretical demodulation performance index with the actual demodulation performance index comprises: Determining a performance deviation factor according to the theoretical demodulation performance index and the actual demodulation performance index; Comparing the performance deviation factor with a preset threshold; And under the condition that the performance deviation factor is larger than a preset threshold value, judging that the theoretical demodulation performance index is inconsistent with the actual demodulation performance index.
4. The method of claim 1, wherein determining a suspected faulty antenna based on the signal energy value for each antenna comprises: acquiring a group of channel estimation values corresponding to each antenna unit, and determining the average received power of the current antenna unit on all subcarriers for each antenna unit; determining the power statistical characteristic of the whole antenna array according to the average received power of each antenna unit on all subcarriers, wherein the power statistical characteristic comprises an array power average value and an array power standard deviation; And determining the suspected fault antenna according to the power statistical characteristics of the whole antenna array and the average received power of each antenna unit on all subcarriers.
5. The method of claim 4, wherein the average received power of the current antenna element over all subcarriers is determined by the following expression: P_i = (1/K) Σ{k=1 to K} |h{i,k}|2 wherein, p_i is the average received power of the ith antenna unit on all subcarriers, K is the total number of subcarriers, h { i, K } is the channel estimation value of the ith antenna on the kth subcarrier, |h { i, K } |2 is the modular square of the channel estimation value, representing the instantaneous power on the subcarrier.
6. The method of claim 4, wherein the suspected faulty antenna is determined from the power statistics of the entire antenna array and the average received power of each antenna element over all subcarriers by the following expression: an antenna satisfying the following expression is taken as a suspected fault antenna: P_i > μ + α·σ Wherein, p_i is the average received power of the ith antenna unit on all subcarriers, μ is the array power average value of the whole antenna array, σ is the array power standard deviation of the whole antenna array, α is a configurable sensitivity coefficient, and is between 2.0 and 3.0.
7. The method of claim 1, wherein determining whether the suspected faulty antenna is an actual faulty antenna based on actual performance data of the shielded MIMO system comprises: acquiring the block error rate, throughput and modulation and coding strategy level of the MIMO system after shielding, and respectively comparing the block error rate, throughput and modulation and coding strategy level with the block error rate, throughput and modulation and coding strategy level of the MIMO system before shielding; And determining whether the suspected fault antenna is an actual fault antenna according to the comparison result.
8. An antenna failure detection apparatus based on a MIMO system, comprising: The acquisition module is used for acquiring the channel state information and the actual demodulation performance index of the user equipment from the MIMO system data link layer; the comparison module is used for predicting theoretical demodulation performance indexes according to the channel state information and comparing the theoretical demodulation performance indexes with actual demodulation performance indexes; the first determining module is used for acquiring the signal energy value of each antenna in the antenna array and determining a suspected fault antenna according to the signal energy value under the condition that the theoretical demodulation performance index is inconsistent with the actual demodulation performance index; The second determining module is used for shielding the suspected fault antenna, acquiring actual performance data of the shielded MIMO system, and determining whether the suspected fault antenna is an actual fault antenna according to the actual performance data.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the MIMO system-based antenna failure detection method of any one of claims 1 to 7.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the MIMO system-based antenna failure detection method of any one of claims 1 to 7.

Description

Antenna fault detection method, device, equipment and storage medium based on MIMO system Technical Field The present application relates to the field of wireless communications technologies, and in particular, to a method, an apparatus, a device, and a storage medium for detecting antenna faults based on a MIMO system. Background Currently, massive MIMO (multiple input multiple output) is a core technology of 5G-Advanced and future communication systems, and its performance is highly dependent on the accuracy of beamforming. However, in practical deployment, the antenna array is prone to "soft failure" caused by device aging, physical damage and the like, and the problem of abnormal signal power of part of antenna units is prone to occur. In the existing fault detection scheme, the power monitoring based on the physical layer is fast in response, but permanent hardware faults and instantaneous channel fading cannot be effectively distinguished, so that the false alarm rate is extremely high. Based on the performance statistics of the data link layer, the performance degradation can be reflected, but the reaction is slow and a fault source cannot be positioned, so that the operation and maintenance response is slow and the positioning is difficult. The existing fault detection scheme has the following problems that firstly, the limitation and misjudgment of single-level detection are solved, the traditional fault detection is often judged only by depending on the signal power or quality of a physical layer, but the instantaneous abnormality of the physical layer can be caused by rapid fading and instantaneous interference of a channel, so that the false alarm rate is high. On the contrary, the response is slow only by means of packet loss rate of the data link layer, and the fault cannot be located in time. Second, the existing systems are insensitive to partially anomalous or degraded antennas, which typically detect "complete failure" of the antenna, but lack effective detection means for antennas with anomalous signal power (e.g., reduced gain, power drift) but not completely disabled, and such partially anomalous or degraded antennas can continue to contaminate the beamforming results. Thirdly, when part of antenna unit signals are abnormal, the calculated beam forming weight based on the assumption that all antennas are normal will be wrong, which results in that the main beam gain is reduced, the energy in the expected signal direction is not concentrated, the sidelobe level is increased, unnecessary radiation directions are generated, energy leakage and adjacent cell interference are caused, the beam pointing bias is that the beam is not accurately aligned to the target user, the distorted beam cannot effectively utilize the space freedom degree, the interference elimination capability of multi-user MIMO is reduced, the space multiplexing gain is reduced, and the overall throughput of the system is reduced and the loss of the spectrum efficiency is finally embodied. Fourth, when the system performance is reduced, the operation staff has difficulty in quickly positioning the antenna unit, the radio frequency link or the algorithm itself, manual station-up check is needed, time and labor are consumed, and the operation and maintenance cost is high. Therefore, the antenna with partially deteriorated performance affects the performance of the whole communication system, but the existing fault detection scheme cannot quickly isolate, locate and repair the problem of the partial fault of the radio frequency antenna, has higher operation and maintenance cost, and cannot realize high-precision and low-false-report diagnosis and treatment of the fault of the antenna on the premise of low delay, which causes the abnormal antenna to continuously pollute the beam, causes beam distortion, gain reduction and system capacity loss, and becomes a key bottleneck affecting the reliability of the network. Disclosure of Invention The embodiment of the application provides an antenna fault detection method, an antenna fault detection device, computer equipment and a storage medium based on a MIMO system. In a first aspect of the embodiment of the present application, there is provided an antenna fault detection method based on a MIMO system, including: acquiring channel state information and an actual demodulation performance index of user equipment from a data link layer of the MIMO system; predicting theoretical demodulation performance indexes according to channel state information, and comparing the theoretical demodulation performance indexes with actual demodulation performance indexes; under the condition that the theoretical demodulation performance index is inconsistent with the actual demodulation performance index, acquiring a signal energy value of each antenna in the antenna array, and determining a suspected fault antenna according to the signal energy value; and shielding the suspected fault antenna, acquir