Positioning information transmission method and system based on Beidou short message communication

Abstract

The invention relates to the technical field of data transmission, in particular to a positioning information transmission method and system based on Beidou short message communication, and the method comprises the steps: obtaining the signal strength and power of each base station; determining an abnormal base station as a transmitting point; vibration and deformation in the transmission range are obtained; determining a temporary base station; determining a target base station according to the temporary base station; adjusting a radius or a synchronization degree threshold value; and transmitting the positioning information to the target base station. By monitoring the signal intensity, the vibration intensity and the deformation quantity of the transmission base station in real time and combining the strategy of dynamically adjusting the radius and the synchronization degree threshold value, the method can effectively adapt to the complex environment, reduce the influence of signal attenuation on the transmission stability and improve the transmission reliability of the positioning information of the abnormal base station, and compared with a traditional transmission mode of fixed parameters, the method has the advantage that the transmission efficiency is improved. The problem that the response speed is low when the interference of a complex tunnel environment is faced due to dependence on static parameters is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of data transmission, and in particular to a positioning information transmission method and system based on Beidou short message communication. Background Art

[0002] With the acceleration of global informatization, communication technology plays an increasingly important role in all walks of life, especially in areas with extremely high requirements for communication network stability and reliability, such as tunnels, underground mines, underground transportation and other places. Due to their special geographical and physical conditions, these environments often have problems such as signal attenuation and transmission interruption. In order to ensure that information can be continuously transmitted in these extreme environments, how to find the best balance between the reliability and efficiency of signal transmission has become a key challenge in the current technological development.

[0003] At present, a variety of technologies have been proposed and applied to address communication problems in special environments such as tunnels and underground mines. Traditional solutions mainly rely on the layout and wiring of fixed base stations, but due to the complex and changeable tunnel environment, the location and number of base stations are difficult to optimally match, which often leads to uneven signal coverage. In order to improve this problem, some systems use wireless relay technology to expand the signal coverage by arranging relay base stations in the tunnel. These relay base stations can connect to the main base station via wireless signals, thereby expanding the communication range. However, traditional relay systems also have some limitations. For example, when equipment in the tunnel fails or the signal is interrupted, the relay signal transmission cannot be adjusted in time, affecting the overall communication efficiency.

[0004] Existing technologies often rely on fixed static parameters when deploying base stations in tunnels or complex environments. However, environmental factors in tunnels (such as shape, material, traffic flow, etc.) can cause attenuation and uneven distribution of signal transmission, resulting in signal blind spots or weak signal areas in certain areas. Traditional base station layout methods are difficult to dynamically adjust to cope with these changes; existing technologies rely on fixed configurations and parameter adjustments, have poor adaptability to complex environments, and cannot handle the impact of complex environmental changes in real time, resulting in insufficient system stability and adaptability. Summary of the invention

[0005] To this end, the present invention provides a positioning information transmission method and system for Beidou short message communication, which is used to overcome the problem of low response speed in the prior art when facing interference in a complex tunnel environment due to reliance on static parameters by dynamically adjusting the transmission path and dynamic threshold adjustment of Beidou short messages.

[0006] To achieve the above object, on the one hand, the present invention provides a positioning information transmission method based on Beidou short message communication, comprising: Obtain the real-time transmission signal strength and real-time signal power of each transmission base station evenly arranged along the tunnel; Determine a number of abnormal base stations according to the real-time transmission signal strength and a preset signal strength threshold, and use each abnormal base station as a transmission point; Acquire the real-time vibration intensity of each transmission base station and the real-time deformation amount at the base station bracket within a circular range divided by a preset length with each transmitting point as the center; Determine a number of temporary base stations according to the real-time vibration intensity, the real-time deformation amount and a preset synchronization threshold; Determine the target base station according to the real-time signal power of any two adjacent temporary base stations and the position of the preset Beidou transmitting base station; The preset radius is adjusted according to the number and position of the target base stations within the preset adjustment time to form an adjusted radius, or the preset synchronization threshold is adjusted according to the real-time transmission signal strength of the target base station within the preset adjustment time and the real-time transmission signal strength of the next adjacent transmission base station to form an adjusted synchronization threshold; The positioning information of the abnormal base station is transmitted to the target base station re-determined based on the adjustment radius or the adjustment synchronization threshold through the built-in Beidou short message device, and the target base station is used as the next transmission point until the positioning information is transmitted to the preset Beidou transmitting base station.

[0007] Further, determining a number of abnormal base stations according to the real-time transmission signal strength and a preset signal strength threshold comprises: When the real-time transmission signal strength is less than the preset signal strength threshold, record its duration; When the duration is greater than a preset duration threshold, it is determined that the transmission base station signal is interrupted, and the corresponding transmission base station is determined to be the abnormal base station, so as to determine a number of abnormal base stations.

[0008] Further, determining a number of temporary base stations according to the real-time vibration intensity, the real-time deformation amount and a preset synchronization threshold comprises: Calculating the standard deviation of the real-time vibration intensity within a preset determined time period to form a vibration fluctuation value; Calculating the standard deviation of the real-time deformation amount within the preset determined time length to form a deformation fluctuation value; A number of temporary base stations are determined according to the vibration fluctuation value and the deformation fluctuation value.

[0009] Further, determining a number of temporary base stations according to the vibration fluctuation value and the deformation fluctuation value includes: Drawing a change curve of the vibration fluctuation value within the preset determined time period to form a vibration curve; Drawing a change curve of the deformation fluctuation value within the preset determined time length to form a deformation curve; Calculating the cosine similarity of the vibration curve and the deformation curve to form a change synchronization; When the change synchronization degree is greater than the preset synchronization degree threshold, the transmission base station is determined to be the temporary base station, so as to determine a plurality of temporary base stations.

[0010] Further, determining the target base station according to the real-time signal power of any two adjacent temporary base stations and the position of a preset Beidou transmitting base station includes: Calculating the absolute value of the relative deviation between the real-time signal power of each temporary base station and a preset unobstructed power threshold to form a terrain obstruction index; Calculate the difference between the terrain shielding indexes of any two adjacent temporary base stations and the ratio of the horizontal distance between the two temporary base stations to form a number of shielding index change rates; The target base station is determined according to the occlusion index change rate and the position of the preset Beidou transmitting base station.

[0011] Further, determining the target base station according to the occlusion index change rate and the position of the preset Beidou transmitting base station includes: Calculate the standard deviation of all the occlusion index change rates to form a discrete value of the change rate; Calculating an average value of all the occlusion index change rates to form a change rate average value; When the change rate discrete value is less than the preset standard discrete value, and the shading index change rate is greater than the change rate average value, it is determined that the corresponding temporary base stations are all to-be-determined base stations, forming a number of to-be-determined base stations; The target base station is determined according to the positions of each of the base stations to be determined and the preset Beidou transmitting base station.

[0012] Further, determining the target base station according to the positions of each of the to-be-determined base stations and the preset Beidou transmitting base station includes: Obtaining the distance between the positions of each of the base stations to be determined and the preset Beidou transmitting base station to form a target determination distance; The to-be-determined base station corresponding to the shortest target determination distance is selected as the target base station.

[0013] Further, adjusting the preset radius according to the number and position of the target base stations within the preset adjustment time, to form the adjusted radius includes: When the number of the target base stations is greater than a preset number threshold, obtaining the distance from the position of each target base station to the transmission point to form a number of transmission point distances; Calculating the standard deviation of all the transmission point distances to form a base station distribution degree; When the base station distribution degree is less than a preset standard distribution degree, the preset radius is adjusted according to a relative deviation between the preset standard distribution degree and the base station distribution degree and a preset first adjustment coefficient to form an adjusted radius.

[0014] Further, adjusting the preset synchronization threshold according to the real-time transmission signal strength of the target base station within the preset adjustment time and the real-time transmission signal strength of the next adjacent transmission base station, to form the adjustment synchronization threshold includes: Calculate the difference between the real-time transmission signal strength of the target base station and the real-time transmission signal strength of the next adjacent transmission base station to form a signal strength attenuation value; Calculating the standard deviation of the signal strength attenuation value to form an attenuation fluctuation value; When the attenuation fluctuation value is greater than the preset attenuation fluctuation threshold, the preset synchronization threshold is adjusted according to the relative deviation between the attenuation fluctuation value and the preset attenuation fluctuation threshold and a preset second adjustment coefficient to form the adjusted synchronization threshold.

[0015] On the other hand, the present invention also provides a positioning information transmission system based on Beidou short message communication, comprising: A first acquisition module is used to acquire the real-time transmission signal strength and real-time signal power of each transmission base station evenly arranged along the tunnel; an abnormality determination module, connected to the first acquisition module, for determining a number of abnormal base stations according to the real-time transmission signal strength and a preset signal strength threshold, and using each abnormal base station as a transmission point; A second acquisition module, connected to the abnormality determination module, is used to obtain the real-time vibration intensity of each transmission base station and the real-time deformation amount at the base station bracket within a circular range divided by a preset length with each transmitting point as the center; a temporary determination module, which is connected to the first acquisition module and the second acquisition module respectively, and is used to determine a number of temporary base stations according to the real-time vibration intensity, the real-time deformation amount and a preset synchronization threshold; A target determination module, connected to the temporary determination module, for determining a target base station according to the real-time signal power of any two adjacent temporary base stations and the position of a preset Beidou transmitting base station; an adjustment module, which is connected to the first acquisition module and the target determination module respectively, and is used to adjust the preset radius according to the number and position of the target base stations within the preset adjustment time to form an adjusted radius, or adjust the preset synchronization threshold according to the real-time transmission signal strength of the target base station within the preset adjustment time and the real-time transmission signal strength of the next transmission base station adjacent thereto to form an adjusted synchronization threshold; A Beidou transmission module is respectively connected to the abnormal determination module and the target determination module, and is used to transmit the positioning information of the abnormal base station to the target base station re-determined based on the adjustment radius or the adjustment synchronization threshold through a built-in Beidou short message device, and use the target base station as the next transmission point until the positioning information is transmitted to the preset Beidou transmitting base station.

[0016] Compared with the prior art, the beneficial effect of the present invention lies in that, by real-time monitoring of the signal strength, vibration intensity and deformation of the transmission base station, and combining the strategy of dynamically adjusting the radius and synchronization threshold, it can effectively adapt to complex environments, reduce the impact of signal attenuation on transmission stability, and improve the transmission reliability of abnormal base station positioning information. Compared with the traditional fixed parameter transmission method, the system's adaptability is enhanced, and it can optimize the information transmission path under different working conditions, ensure communication continuity in the tunnel environment, and improve the emergency response capability in sudden situations. At the same time, it reduces the base station maintenance cost, improves the stability and service life of the overall communication system, and effectively solves the problem of communication interruption caused by changes in geological conditions, equipment vibration or signal attenuation in the tunnel, ensures the stable transmission of positioning information, and effectively solves the problem of low response speed when facing interference in a complex tunnel environment due to reliance on static parameters.

[0017] Furthermore, by setting a duration threshold, it is possible to effectively avoid misjudging abnormal base stations due to short-term signal fluctuations, thereby improving the accuracy of the judgment. At the same time, it ensures that only base stations with long-term signal anomalies are identified, which helps to distinguish temporary interference from real transmission failures, making the subsequent compensation mechanism more accurate, thereby improving the stability and reliability of positioning information transmission in the tunnel.

[0018] Furthermore, by calculating the fluctuations of vibration and deformation, it is possible to effectively identify base stations that are greatly affected by external interference or structural deformation, and avoid unstable factors in the transmission process of these base stations. At the same time, it reduces the probability of misjudgment and improves the accuracy of abnormal base station information transmission, making the Beidou short message communication system more stable and reliable in tunnel environments, ensuring that positioning information can still be transmitted in a timely manner in the event of base station failure or abnormal conditions.

[0019] Furthermore, vibration intensity and deformation are important parameters that characterize the stability of the base station. The vibration intensity reflects the short-period disturbances to the base station, such as mechanical vibration or external shock, while the deformation reflects the long-term structural changes of the base station bracket, such as uneven force or geological deformation. When the vibration fluctuation value of the base station is large but the deformation fluctuation value is small, it means that there may be short-term interference, which may not necessarily affect the signal stability; when the deformation fluctuation value is large but the vibration fluctuation value is small, it indicates that the base station may have slowly displaced, affecting the long-term stability. Only when both show abnormal fluctuations at the same time, it indicates that the base station is in an unstable state. Therefore, using these two parameters to jointly determine the temporary base station can effectively avoid misjudgment and ensure the communication system's dual adaptability to structural changes and short-term interference.

[0020] Furthermore, using the cosine similarity of the vibration curve and the deformation curve to determine the state of the base station can effectively distinguish short-term disturbances from long-term structural changes, and improve the accuracy of abnormal base station screening. If the change trends of the two curves are highly similar, it means that the vibration and deformation of the base station may be caused by the same external factors (such as geological changes or abnormal structural stress), which means that the base station is in an unstable state. If the change trends of the two are different, it may be a short-term disturbance or an individual sensor error. It does not need to be directly determined as a temporary base station, which can ensure that the selection of temporary base stations is more accurate and avoid false alarms or omissions.

[0021] Furthermore, in a tunnel environment, signal transmission is easily affected by terrain obstruction, resulting in different fluctuation characteristics of signal power changes between base stations. Calculating the standard deviation of the rate of change of the obstruction index (discrete value of the rate of change) can measure the stability of the overall obstruction change and prevent local abnormal points from interfering with the determination of the target base station. At the same time, calculating the average value of the rate of change and screening out base stations greater than the mean can ensure that the selected base station is indeed in an area where the signal attenuation is more obvious, thereby accurately reflecting the signal obstruction in the tunnel. When the discrete value of the rate of change is small, it means that the rate of change of the obstruction index is relatively stable in the tunnel environment. At this time, combined with the average value for screening, random fluctuations can effectively avoid misleading the selection of target base stations. Finally, combined with the location of the base station to be determined and the Beidou transmitting base station, the target base station distribution is ensured to be reasonable to optimize the transmission path of abnormal base station information.

[0022] Furthermore, selecting the base station with the shortest target determination distance helps reduce the attenuation of the signal propagation process and improve the quality of data transmission. Due to the closed nature of the tunnel environment, the signal is easily affected by factors such as wall reflection and equipment interference. The shorter signal transmission path can effectively reduce the loss and ensure stable data transmission. It can optimize the signal transmission path in the tunnel and ensure that the data information of the abnormal base station can be quickly and stably transmitted to the Beidou transmitting base station, thereby improving the reliability of the tunnel communication system. In the event of an abnormal base station, the signal can be guaranteed to be uninterrupted, ensuring the continuity of tunnel monitoring and safety management.

[0023] Furthermore, by calculating the base station distribution degree, the spatial distribution of the target base station can be determined and its distribution can be ensured to be balanced. When the base station distribution is too concentrated or too dispersed, the effective coverage range of the signal will be affected. Through adjustments based on the standard distribution degree, the base station coverage area can be dynamically optimized to avoid signal redundancy or coverage blind spots, and improve the stability and adaptability of the system. It ensures that the signal relay base stations near the abnormal base station can be reasonably distributed, thereby improving the stability of communication and data transmission efficiency. By dynamically adjusting the preset radius, the target base station will neither be over-concentrated to cause signal interference nor over-dispersed to cause insufficient coverage, ensuring that the communication system in the tunnel environment can still operate efficiently and reliably under abnormal circumstances, which helps to improve the intelligent management level and emergency handling capabilities of the entire system.

[0024] Furthermore, by calculating the signal strength difference (signal strength attenuation value) between the target base station and the adjacent base station and analyzing its fluctuation, the instability of signal attenuation can be accurately captured. The standard deviation of the signal attenuation value (attenuation fluctuation value) reflects the fluctuation during signal transmission. When the attenuation fluctuation is large, it means that the signal quality is highly unstable and may be affected by environmental changes or other interference factors. In this case, by adjusting the synchronization threshold, the system can flexibly adapt to signal changes and avoid misjudgment or base station position deviation caused by excessive signal fluctuations.

[0025] Furthermore, through the detection of abnormal base stations and the determination of temporary base stations, the synchronization threshold or transmission radius can be adjusted in time when the signal is weak or interrupted to ensure continuous and stable signals, effectively improving the robustness of the positioning system in the tunnel environment and ensuring that the base station can maintain accurate signal transmission even in complex environments, thereby ensuring efficient and stable transmission of positioning information and avoiding the accuracy of positioning information affected by environmental changes or signal attenuation in the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a flow chart of the positioning information transmission method based on Beidou short message communication in this embodiment; Figure 2 This is a logic diagram for determining an abnormal base station in this embodiment; Figure 3 A logic decision diagram for determining a temporary base station for this embodiment; Figure 4 This is a logic decision diagram for determining a base station to be determined in this embodiment. DETAILED DESCRIPTION

[0027] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0029] On the one hand, see Figure 1 As shown, it is a flow chart of the positioning information transmission method based on Beidou short message communication in this embodiment; This embodiment provides a positioning information transmission method based on Beidou short message communication, including: Obtain the real-time transmission signal strength and real-time signal power of each transmission base station evenly arranged along the tunnel; Determine a number of abnormal base stations according to the real-time transmission signal strength and a preset signal strength threshold, and use each abnormal base station as a transmission point; Acquire the real-time vibration intensity of each transmission base station and the real-time deformation amount at the base station bracket within a circular range divided by a preset length with each transmitting point as the center; Determine a number of temporary base stations according to the real-time vibration intensity, the real-time deformation amount and a preset synchronization threshold; Determine the target base station according to the real-time signal power of any two adjacent temporary base stations and the position of the preset Beidou transmitting base station; The preset radius is adjusted according to the number and position of the target base stations within the preset adjustment time to form an adjusted radius, or the preset synchronization threshold is adjusted according to the real-time transmission signal strength of the target base station within the preset adjustment time and the real-time transmission signal strength of the next adjacent transmission base station to form an adjusted synchronization threshold; The positioning information of the abnormal base station is transmitted to the target base station re-determined based on the adjustment radius or the adjustment synchronization threshold through the built-in Beidou short message device, and the target base station is used as the next transmission point until the positioning information is transmitted to the preset Beidou transmitting base station.

[0030] Through the built-in signal monitoring modules of each transmission base station evenly set in the tunnel, the real-time transmission signal strength and signal power of the base station are continuously collected and recorded. The signal strength is measured by the RSSI (received signal strength indication) value of the received signal, while the signal power is calculated by the power detection device at the transmitting end of the transmission base station. Each transmission base station is equipped with an independent vibration sensor and deformation monitoring device to obtain its own vibration intensity and the deformation amount at the bracket of the base station in real time. The vibration sensor calculates the vibration amplitude and frequency by detecting the slight acceleration change of the base station body, while the deformation monitoring device uses strain gauges to monitor the force change of the bracket. These data are collected in real time by the processing unit inside the base station and stored in the local storage module or directly uploaded to the system through the built-in communication module, so that after the abnormal base station is identified, the base station data within the relevant range can be directly retrieved without additional data request, thereby ensuring the independence and real-time nature of data acquisition.

[0031] The preset signal strength threshold is a reference value for determining whether a base station is abnormal. It depends on the normal signal attenuation level in the tunnel environment and is usually set between 60 dBm and 80 dBm. In this embodiment, it is set to 70 dBm to ensure a timely response to signal abnormalities.

[0032] The preset length is the radius length of the circular range of data collection defined around the abnormal base station, which depends on the spacing between base stations in the tunnel and the signal coverage capability. It is usually set to 50m to 150m. In this embodiment, it is set to 100m to cover a sufficient range and ensure the accuracy of data collection.

[0033] The preset synchronization threshold is a reference value for determining whether the vibration and deformation of the base station are synchronized. It depends on the tunnel structure characteristics and the base station installation method. It is usually set to 0.6 to 0.9. In this embodiment, it is set to 0.75 to improve the accuracy of base station status determination.

[0034] The preset adjustment duration is a time window for dynamically adjusting parameters, which depends on the response speed of the base station status change and is usually set to 5 minutes to 30 minutes. In this embodiment, it is set to 10 minutes to take into account both real-time performance and data stability.

[0035] The preset Beidou transmitting base station is the only signal transmitting base station at the tunnel entrance. It is mainly used to directly send the positioning information in the form of Beidou short messages when the base station in the tunnel fails. Its setting depends on the length of the tunnel and the coverage of Beidou short message communication. In this embodiment, it is set at the tunnel entrance to ensure that even if the transmission inside the tunnel is blocked, the positioning information can still be sent smoothly to the outside, thereby improving the emergency communication capability and information transmission reliability in the tunnel environment.

[0036] First, the real-time transmission signal strength and signal power of each transmission base station evenly distributed along the tunnel are obtained, and the abnormal base station is identified according to the signal strength threshold. Subsequently, within the radius of a preset length centered on the abnormal base station as the transmitting point, the real-time vibration intensity and deformation at the bracket of each base station in the area are further obtained, and the temporary base station is determined according to the preset synchronization threshold. By analyzing the signal power of any adjacent temporary base station and the position of the preset Beidou transmitting base station, the target base station is finally determined. Within the preset adjustment time, the radius or synchronization threshold is dynamically adjusted according to the number, location and transmission signal strength of the target base station. Finally, the positioning information of the abnormal base station is transmitted through the Beidou short message communication device on the target base station to ensure accurate and efficient transmission of information.

[0037] By real-time monitoring of the signal strength, vibration intensity and deformation of the transmission base station, and combining the strategy of dynamically adjusting the radius and synchronization threshold, it can effectively adapt to complex environments, reduce the impact of signal attenuation on transmission stability, and improve the transmission reliability of abnormal base station positioning information. Compared with the traditional fixed parameter transmission method, the system's adaptability is enhanced, and it can optimize the information transmission path under different working conditions, ensure communication continuity in the tunnel environment, and improve the emergency response capability in sudden situations. At the same time, it reduces the maintenance cost of the base station, improves the stability and service life of the overall communication system, and effectively solves the problem of communication interruption caused by changes in geological conditions, equipment vibration or signal attenuation in the tunnel, ensures the stable transmission of positioning information, and effectively solves the problem of low response speed when facing interference in a complex tunnel environment due to reliance on static parameters.

[0038] Please continue reading Figure 2 As shown, it is a determination logic diagram of determining an abnormal base station in this embodiment; Determining a number of abnormal base stations according to the real-time transmission signal strength and a preset signal strength threshold comprises: When the real-time transmission signal strength is less than the preset signal strength threshold, record its duration; When the duration is greater than a preset duration threshold, it is determined that the transmission base station signal is interrupted, and the corresponding transmission base station is determined to be the abnormal base station, so as to determine a number of abnormal base stations.

[0039] The preset duration threshold refers to the time threshold used to determine that the base station signal is abnormal, that is, the base station signal strength is lower than the preset signal strength threshold and lasts for more than this duration before it is judged as an abnormal base station. It depends on the stability of the signal environment in the tunnel, the instantaneous interference situation and the system's tolerance for short-term signal fluctuations. It is usually set between 3 seconds and 10 seconds to balance the misjudgment rate and response speed. In this embodiment, it is set to 5 seconds, which can not only avoid misjudgment caused by short-term interference, but also respond quickly when the base station actually fails, thereby improving the reliability of positioning information transmission in the tunnel.

[0040] First, the real-time transmission signal strength of each transmission base station is compared with the preset signal strength threshold. When the signal strength of a base station is lower than the threshold, its duration is recorded. If the abnormal state lasts longer than the preset duration threshold, the signal of the base station is determined to be interrupted and marked as an abnormal base station, thereby determining the location of each abnormal base station in the tunnel.

[0041] By setting a duration threshold, we can effectively avoid misjudging abnormal base stations due to short-term signal fluctuations and improve the accuracy of judgment. At the same time, we ensure that only base stations with long-term signal abnormalities are identified, which helps to distinguish temporary interference from real transmission failures, making the subsequent compensation mechanism more accurate, thereby improving the stability and reliability of positioning information transmission in tunnels.

[0042] Specifically, determining a number of temporary base stations according to the real-time vibration intensity, the real-time deformation amount, and a preset synchronization threshold includes: Calculating the standard deviation of the real-time vibration intensity within a preset determined time period to form a vibration fluctuation value; Calculating the standard deviation of the real-time deformation amount within the preset determined time length to form a deformation fluctuation value; A number of temporary base stations are determined according to the vibration fluctuation value and the deformation fluctuation value.

[0043] The system collects the real-time vibration intensity of each transmission base station and the real-time deformation of the base station bracket within a preset time, and calculates their standard deviations to obtain the vibration fluctuation value and deformation fluctuation value. Then, based on these two fluctuation values, the system selects the base stations whose signal transmission may be structurally affected as temporary base stations, providing a basis for subsequent adjustment of communication parameters and optimization of transmission paths.

[0044] Vibration intensity and deformation are important parameters that characterize the stability of base stations. Vibration intensity reflects the short-period disturbances to the base station, such as mechanical vibration or external shock, while deformation reflects the long-term structural changes of the base station bracket, such as uneven force or geological deformation. When the vibration fluctuation value of the base station is large but the deformation fluctuation value is small, it means that there may be short-term interference, which may not necessarily affect the signal stability; when the deformation fluctuation value is large but the vibration fluctuation value is small, it indicates that the base station may have slowly displaced, affecting the long-term stability. Only when both show abnormal fluctuations at the same time, it indicates that the base station is in an unstable state. Therefore, using these two parameters to jointly determine temporary base stations can effectively avoid misjudgment and ensure the communication system's dual adaptability to structural changes and short-term interference.

[0045] Please continue reading Figure 3 As shown, it is a logic decision diagram for determining a temporary base station in this embodiment; Determining a number of temporary base stations according to the vibration fluctuation value and the deformation fluctuation value comprises: Drawing a change curve of the vibration fluctuation value within the preset determined time period to form a vibration curve; Drawing a change curve of the deformation fluctuation value within the preset determined time length to form a deformation curve; Calculating the cosine similarity of the vibration curve and the deformation curve to form a change synchronization; When the change synchronization degree is greater than the preset synchronization degree threshold, the transmission base station is determined to be the temporary base station, so as to determine a plurality of temporary base stations.

[0046] The preset synchronization threshold is the minimum standard for the cosine similarity of the vibration curve and the deformation curve, which depends on the stability requirements of the tunnel structure, the rigidity of the base station bracket, geological environmental factors, and the correlation between vibration and deformation in historical monitoring data. It is usually set between 0.7 and 0.9. In this embodiment, it is set to 0.85, which can ensure that the temporary base station is marked only when there is a high correlation between vibration and deformation, thereby reducing false alarms and avoiding erroneous judgments due to short-term vibration or sensor errors.

[0047] First, the vibration fluctuation value and deformation fluctuation value of each base station are monitored within a preset time, and the vibration curve and deformation curve are drawn respectively to reflect the dynamic change trend of the base station. Then, by calculating the cosine similarity of the two curves, the synchronization degree of the vibration change and the deformation change is evaluated to form the change synchronization degree. Finally, when the change synchronization degree of an abnormal base station exceeds the preset synchronization degree threshold, the base station is determined to be a temporary base station to determine a number of temporary base stations.

[0048] Using the cosine similarity of the vibration curve and the deformation curve to determine the status of the base station can effectively distinguish short-term disturbances from long-term structural changes, and improve the accuracy of abnormal base station screening. If the change trends of the two curves are highly similar, it means that the vibration and deformation of the base station may be caused by the same external factors (such as geological changes or abnormal structural stress), which means that the base station is in an unstable state. If the change trends of the two curves are different, it may be a short-term disturbance or an individual sensor error. It does not need to be directly determined as a temporary base station, which can ensure that the selection of temporary base stations is more accurate and avoid false alarms or missed alarms.

[0049] Specifically, determining the target base station according to the real-time signal power of any two adjacent temporary base stations and the position of a preset Beidou transmitting base station includes: Calculating the absolute value of the relative deviation between the real-time signal power of each temporary base station and a preset unobstructed power threshold to form a terrain obstruction index; Calculate the difference between the terrain shielding indexes of any two adjacent temporary base stations and the ratio of the horizontal distance between the two temporary base stations to form a number of shielding index change rates; The target base station is determined according to the occlusion index change rate and the position of the preset Beidou transmitting base station.

[0050] The preset unobstructed power threshold refers to the reference power level of the base station's normal transmission signal in an unobstructed environment, which depends on the base station's transmit power, receiving sensitivity, antenna gain, and signal propagation model, and needs to consider the reflection and attenuation characteristics in the tunnel. It is usually set between 20dBm and 30dBm to adapt to the signal propagation characteristics of different tunnel environments. In this embodiment, it is set to 25dBm, which takes into account the strong signal multipath effect in the tunnel and ensures that the base station has sufficient signal coverage in the unobstructed area, thereby improving the communication stability between base stations and providing a reasonable benchmark for the calculation of the terrain obstruction index.

[0051] First, the absolute value of the relative deviation of the real-time signal power of each temporary base station relative to the preset unobstructed power threshold is calculated to form a terrain obstruction index, which is used to measure the degree of obstruction of the tunnel environment to signal transmission. Next, the ratio of the difference in the terrain obstruction index of any two adjacent temporary base stations to the horizontal distance between the two base stations is calculated to obtain the obstruction index change rate, which is used to reflect the signal obstruction change trend in different areas of the tunnel. Finally, the target base station is determined by combining the obstruction index change rate with the location of the preset Beidou transmitting base station to optimize the information transmission path.

[0052] By calculating the terrain shielding index and its rate of change, the signal attenuation characteristics of different areas in the tunnel can be accurately identified to avoid misjudging the target base station due to abnormal single signal power. At the same time, combined with the location of the Beidou transmitting base station, the distribution of the target base station can be optimized so that it can effectively receive Beidou signals and minimize the impact of the tunnel structure on signal propagation, thereby improving the stability and reliability of Beidou short message communication in the tunnel, ensuring that the positioning information of abnormal base stations can be transmitted smoothly, and maintaining smooth communication even in complex terrain environments.

[0053] Please continue reading Figure 4 As shown, it is a logic decision diagram for determining the base station to be determined in this embodiment; Specifically, determining the target base station according to the occlusion index change rate and the position of the preset Beidou transmitting base station includes: Calculate the standard deviation of all the occlusion index change rates to form a discrete value of the change rate; Calculating an average value of all the occlusion index change rates to form a change rate average value; When the change rate discrete value is less than the preset standard discrete value, and the shading index change rate is greater than the change rate average value, it is determined that the corresponding temporary base stations are all to-be-determined base stations, forming a number of to-be-determined base stations; The target base station is determined according to the positions of each of the base stations to be determined and the preset Beidou transmitting base station.

[0054] The preset standard discrete value is a threshold value for measuring the overall fluctuation of the occlusion index change rate, which depends on the complexity of the tunnel environment, the base station spacing, the signal fluctuation characteristics and the terrain occlusion degree. It is usually set between 0.05 and 0.2. In this embodiment, it is set to 0.1, which can ensure that the target base station is screened when the signal occlusion fluctuation is relatively stable, avoiding local sudden interference and causing erroneous screening, while ensuring the continuity and stability of communication in the tunnel.

[0055] First, the standard deviation of all occlusion index change rates is calculated to obtain the discrete value of the change rate to measure the degree of fluctuation of the occlusion index change. Then, the average value of all occlusion index change rates is calculated as a benchmark reference. When the discrete value of the change rate is less than the preset standard discrete value, and the change rate of a certain occlusion index is greater than the average value of the change rate, the temporary base station is determined as a base station to be determined, forming several base stations to be determined. Finally, based on the locations of these base stations to be determined and the locations of the preset Beidou transmitting base stations, the target base station is finally determined.

[0056] In a tunnel environment, signal transmission is easily affected by terrain obstruction, resulting in different fluctuation characteristics of signal power changes between base stations. Calculating the standard deviation of the rate of change of the obstruction index (discrete value of the rate of change) can measure the stability of the overall obstruction change and prevent local abnormal points from interfering with the determination of the target base station. At the same time, calculating the average value of the rate of change and screening out base stations greater than the average value can ensure that the selected base station is indeed in an area where the signal attenuation is more obvious, thereby accurately reflecting the signal obstruction in the tunnel. When the discrete value of the rate of change is small, it means that the rate of change of the obstruction index is relatively stable in the tunnel environment. At this time, combined with the average value for screening, random fluctuations can effectively avoid misleading the selection of target base stations. Finally, combined with the location of the base station to be determined and the Beidou transmitting base station, ensure that the target base station is reasonably distributed to optimize the transmission path of abnormal base station information.

[0057] Specifically, determining the target base station according to the positions of each of the to-be-determined base stations and the preset Beidou transmitting base station includes: Obtaining the distance between the positions of each of the base stations to be determined and the preset Beidou transmitting base station to form a target determination distance; The to-be-determined base station corresponding to the shortest target determination distance is selected as the target base station.

[0058] After determining several base stations to be determined, first obtain the actual distance between each base station to be determined and the preset Beidou transmitting base station, and record it as the target determination distance. Then, compare the target determination distances of all base stations to be determined, and select the base station to be determined with the shortest distance as the target base station to ensure that the base station can relay and transmit signals at the optimal location.

[0059] After determining several base stations to be determined, first obtain the actual distance between each base station to be determined and the preset Beidou transmitting base station, and record it as the target determination distance. Then, compare the target determination distances of all base stations to be determined, and select the base station to be determined with the shortest distance as the target base station to ensure that the base station can be in the optimal position to undertake signal relay and transmission tasks, thereby improving data transmission efficiency and reliability.

[0060] Selecting the base station with the shortest target determination distance helps reduce the attenuation of the signal during propagation and improve the quality of data transmission. Due to the closed nature of the tunnel environment, the signal is easily affected by factors such as wall reflection and equipment interference. A shorter signal transmission path can effectively reduce the loss and ensure stable data transmission. It can optimize the signal transmission path in the tunnel and ensure that the data information of the abnormal base station can be quickly and stably transmitted to the Beidou transmitting base station, thereby improving the reliability of the tunnel communication system. In the event of an abnormal base station, the signal can be guaranteed to be uninterrupted, ensuring the continuity of tunnel monitoring and safety management.

[0061] Specifically, adjusting the preset radius according to the number and position of the target base stations within the preset adjustment time to form the adjusted radius includes: When the number of the target base stations is greater than a preset number threshold, obtaining the distance from the position of each target base station to the transmission point to form a number of transmission point distances; Calculating the standard deviation of all the transmission point distances to form a base station distribution degree; When the base station distribution degree is less than the preset standard distribution degree, the preset radius is adjusted according to the relative deviation between the preset standard distribution degree and the base station distribution degree and the preset first adjustment coefficient to form an adjusted radius, wherein the relative deviation between the preset standard distribution degree and the base station distribution degree is positively correlated with the adjusted radius.

[0062] The preset number threshold refers to the radius adjustment triggered when the number of target base stations exceeds the threshold within the preset adjustment time. Its value is usually determined according to the deployment density of the target base stations, signal coverage requirements and environmental complexity. Usually, the threshold is set between 3 and 7 to ensure that the number of base stations is moderate, which can cover abnormal areas without causing overly dense signal interference. In this embodiment, it is set to 5 to maintain a reasonable signal relay distribution in a tunnel environment.

[0063] The preset first adjustment coefficient is used to dynamically adjust the preset radius according to the relative deviation between the base station distribution degree and the standard distribution degree. Its value is usually determined based on historical data, signal attenuation model and actual test experience to ensure that the adjustment range is not too large or too small. It is usually set between 0.1 and 0.5 to balance the sensitivity and stability of the adjustment. In this embodiment, it is set to 0.3 to avoid excessive changes in signal distribution due to excessive adjustment range while ensuring signal coverage.

[0064] First, the number of target base stations is counted within the preset adjustment time and compared with the preset number threshold. If the number of target base stations exceeds the threshold, the distances from all target base stations to abnormal base stations are obtained to form a set of transmission point distances. Next, the standard deviation of these distances is calculated to obtain the base station distribution degree. Then, the base station distribution degree is compared with the preset standard distribution degree, the relative deviation is calculated, and the preset radius is adjusted in combination with the preset first adjustment coefficient to form a new adjustment radius to optimize the base station distribution range.

[0065] By calculating the base station distribution degree, the spatial distribution of the target base station can be determined and its distribution can be balanced. When the base station distribution is too concentrated or too dispersed, the effective coverage of the signal will be affected. Through adjustments based on the standard distribution degree, the base station coverage area can be dynamically optimized to avoid signal redundancy or coverage blind spots, and improve the stability and adaptability of the system. It ensures that the signal relay base stations near the abnormal base station can be reasonably distributed, thereby improving the stability of communication and data transmission efficiency. By dynamically adjusting the preset radius, the target base station will neither be over-concentrated to cause signal interference nor over-dispersed to cause insufficient coverage, ensuring that the communication system in the tunnel environment can still operate efficiently and reliably under abnormal circumstances, which helps to improve the intelligent management level and emergency handling capabilities of the entire system.

[0066] Specifically, adjusting the preset synchronization threshold according to the real-time transmission signal strength of the target base station within the preset adjustment time and the real-time transmission signal strength of the next adjacent transmission base station, to form the adjustment synchronization threshold includes: Calculate the difference between the real-time transmission signal strength of the target base station and the real-time transmission signal strength of the next adjacent transmission base station to form a signal strength attenuation value; Calculating the standard deviation of the signal strength attenuation value to form an attenuation fluctuation value; When the attenuation fluctuation value is greater than the preset attenuation fluctuation threshold, the preset synchronization threshold is adjusted according to the relative deviation between the attenuation fluctuation value and the preset attenuation fluctuation threshold and the preset second adjustment coefficient to form the adjusted synchronization threshold, wherein the relative deviation between the attenuation fluctuation value and the preset attenuation fluctuation threshold is negatively correlated with the adjusted synchronization threshold.

[0067] The preset attenuation fluctuation threshold refers to the standard value within the fluctuation range of the signal strength attenuation value, which is used to determine whether the signal attenuation fluctuation exceeds the normal fluctuation range. It depends on the system's tolerance range for signal attenuation and the impact of environmental changes in the tunnel on signal transmission. It is usually set between 0.5dB and 2dB. In this embodiment, it is set to 1.5dB. While ensuring system stability, it can avoid too frequent adjustments, ensure that signal fluctuations are within a reasonable range, and avoid misjudgment due to small fluctuations.

[0068] The preset second adjustment coefficient is a proportional factor used to adjust the synchronization threshold, which determines the amplitude of change of the synchronization threshold when the signal strength attenuation fluctuates greatly. It depends on the sensitivity requirements of the system and the impact of the attenuation fluctuation on the synchronization of the base station. It is usually set between 0.1 and 0.5. In this embodiment, it is set to 0.3, which can ensure that when the signal attenuation fluctuation exceeds the normal range, the synchronization threshold will not be adjusted too drastically, which can ensure the adaptability of the system to abnormal situations without excessive adjustment causing interference with normal working conditions.

[0069] First, the real-time transmission signal strength of the target base station and the real-time signal strength of the next adjacent transmission base station are obtained, and the difference between the two is calculated to form a signal strength attenuation value. Then, the standard deviation of the attenuation value is calculated to obtain an attenuation fluctuation value. If the attenuation fluctuation value is greater than the preset attenuation fluctuation threshold, the preset synchronization threshold is adjusted based on the relative deviation between the attenuation fluctuation value and the preset threshold, and finally the adjusted synchronization threshold is formed.

[0070] By calculating the signal strength difference (signal strength attenuation value) between the target base station and the adjacent base station and analyzing its fluctuation, the instability of signal attenuation can be accurately captured. The standard deviation of the signal attenuation value (attenuation fluctuation value) reflects the fluctuation during signal transmission. When the attenuation fluctuation is large, it means that the signal quality is highly unstable and may be affected by environmental changes or other interference factors. In this case, by adjusting the synchronization threshold, the system can flexibly adapt to signal changes and avoid misjudgment or base station position deviation caused by excessive signal fluctuations.

[0071] On the other hand, this embodiment also provides a positioning information transmission system based on Beidou short message communication, including: A first acquisition module is used to acquire the real-time transmission signal strength and real-time signal power of each transmission base station evenly arranged along the tunnel; an abnormality determination module, connected to the first acquisition module, for determining a number of abnormal base stations according to the real-time transmission signal strength and a preset signal strength threshold, and using each abnormal base station as a transmission point; A second acquisition module, connected to the abnormality determination module, is used to obtain the real-time vibration intensity of each transmission base station and the real-time deformation amount at the base station bracket within a circular range divided by a preset length with each transmitting point as the center; a temporary determination module, which is connected to the first acquisition module and the second acquisition module respectively, and is used to determine a number of temporary base stations according to the real-time vibration intensity, the real-time deformation amount and a preset synchronization threshold; A target determination module, connected to the temporary determination module, for determining a target base station according to the real-time signal power of any two adjacent temporary base stations and the position of a preset Beidou transmitting base station; an adjustment module, which is connected to the first acquisition module and the target determination module respectively, and is used to adjust the preset radius according to the number and position of the target base stations within the preset adjustment time to form an adjusted radius, or adjust the preset synchronization threshold according to the real-time transmission signal strength of the target base station within the preset adjustment time and the real-time transmission signal strength of the next transmission base station adjacent thereto to form an adjusted synchronization threshold; A Beidou transmission module is respectively connected to the abnormal determination module and the target determination module, and is used to transmit the positioning information of the abnormal base station to the target base station re-determined based on the adjustment radius or the adjustment synchronization threshold through a built-in Beidou short message device, and use the target base station as the next transmission point until the positioning information is transmitted to the preset Beidou transmitting base station.

[0072] This system realizes the transmission of positioning information based on Beidou short message communication through the collaborative work of multiple modules. First, the first acquisition module obtains the real-time signal strength and signal power of each transmission base station in the tunnel, and determines the abnormal base station according to the preset threshold through the abnormal determination module. Then, the second acquisition module obtains the vibration intensity and deformation around these abnormal base stations. The temporary determination module determines the temporary base station based on these data and the synchronization threshold. The target determination module determines the target base station by the signal power of the adjacent temporary base station and the position of the preset Beidou transmitting base station. The adjustment module adjusts the radius or synchronization threshold according to the number, location, signal strength and other information of the target base station. Finally, the Beidou transmission module uses the adjusted parameters to transmit the positioning information of the abnormal base station on the target base station through the Beidou short message communication device, and uses the target base station as the next transmission point until the positioning information is transmitted to the preset Beidou transmitting base station.

[0073] By detecting abnormal base stations and determining temporary base stations, the synchronization threshold or transmission radius can be adjusted in time when the signal is weak or interrupted to ensure continuous and stable signals, effectively improving the robustness of the positioning system in the tunnel environment and ensuring that the base station can maintain accurate signal transmission even in complex environments, thereby ensuring efficient and stable transmission of positioning information and avoiding the accuracy of positioning information affected by environmental changes or signal attenuation in the tunnel.

[0074] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A positioning information transmission method based on Beidou short message communication, characterized in that: include: Obtain the real-time transmission signal strength and real-time signal power of each transmission base station evenly arranged along the tunnel; Determine a number of abnormal base stations according to the real-time transmission signal strength and a preset signal strength threshold, and use each abnormal base station as a transmission point; Acquire the real-time vibration intensity of each transmission base station and the real-time deformation amount at the base station bracket within a circular range divided by a preset length with each transmitting point as the center; Determine a number of temporary base stations according to the real-time vibration intensity, the real-time deformation amount and a preset synchronization threshold; Determine the target base station according to the real-time signal power of any two adjacent temporary base stations and the position of the preset Beidou transmitting base station; The preset radius is adjusted according to the number and position of the target base stations within the preset adjustment time to form an adjusted radius, or the preset synchronization threshold is adjusted according to the real-time transmission signal strength of the target base station within the preset adjustment time and the real-time transmission signal strength of the next adjacent transmission base station to form an adjusted synchronization threshold; The positioning information of the abnormal base station is transmitted to the target base station re-determined based on the adjustment radius or the adjustment synchronization threshold through the built-in Beidou short message device, and the target base station is used as the next transmission point until the positioning information is transmitted to the preset Beidou transmitting base station.

2. The positioning information transmission method based on Beidou short message communication according to claim 1 is characterized in that: Determining a number of abnormal base stations according to the real-time transmission signal strength and a preset signal strength threshold comprises: When the real-time transmission signal strength is less than the preset signal strength threshold, record its duration; When the duration is greater than a preset duration threshold, it is determined that the transmission base station signal is interrupted, and the corresponding transmission base station is determined to be the abnormal base station, so as to determine a number of abnormal base stations.

3. The positioning information transmission method based on Beidou short message communication according to claim 2 is characterized in that: Determining a number of temporary base stations according to the real-time vibration intensity, the real-time deformation amount, and a preset synchronization threshold comprises: Calculating the standard deviation of the real-time vibration intensity within a preset determined time period to form a vibration fluctuation value; Calculating the standard deviation of the real-time deformation amount within the preset determined time length to form a deformation fluctuation value; A number of temporary base stations are determined according to the vibration fluctuation value and the deformation fluctuation value.

4. The positioning information transmission method based on Beidou short message communication according to claim 3 is characterized in that: Determining a number of temporary base stations according to the vibration fluctuation value and the deformation fluctuation value comprises: Drawing a change curve of the vibration fluctuation value within the preset determined time period to form a vibration curve; Drawing a change curve of the deformation fluctuation value within the preset determined time length to form a deformation curve; Calculating the cosine similarity of the vibration curve and the deformation curve to form a change synchronization; When the change synchronization degree is greater than the preset synchronization degree threshold, the transmission base station is determined to be the temporary base station, so as to determine a plurality of temporary base stations.

5. The positioning information transmission method based on Beidou short message communication according to claim 4 is characterized in that: Determining the target base station according to the real-time signal power of any two adjacent temporary base stations and the position of a preset Beidou transmitting base station includes: Calculating the absolute value of the relative deviation between the real-time signal power of each temporary base station and a preset unobstructed power threshold to form a terrain obstruction index; Calculate the difference between the terrain shielding indexes of any two adjacent temporary base stations and the ratio of the horizontal distance between the two temporary base stations to form a number of shielding index change rates; The target base station is determined according to the occlusion index change rate and the position of the preset Beidou transmitting base station.

6. The positioning information transmission method based on Beidou short message communication according to claim 5 is characterized in that: Determining the target base station according to the occlusion index change rate and the position of the preset Beidou transmitting base station includes: Calculate the standard deviation of all the occlusion index change rates to form a discrete value of the change rate; Calculating an average value of all the occlusion index change rates to form a change rate average value; When the change rate discrete value is less than the preset standard discrete value, and the shading index change rate is greater than the change rate average value, it is determined that the corresponding temporary base stations are all to-be-determined base stations, forming a number of to-be-determined base stations; The target base station is determined according to the positions of each of the base stations to be determined and the preset Beidou transmitting base station.

7. The positioning information transmission method based on Beidou short message communication according to claim 6 is characterized in that: Determining the target base station according to the positions of each of the to-be-determined base stations and the preset Beidou transmitting base station includes: Obtaining the distance between the positions of each of the base stations to be determined and the preset Beidou transmitting base station to form a target determination distance; The to-be-determined base station corresponding to the shortest target determination distance is selected as the target base station.

8. The positioning information transmission method based on Beidou short message communication according to claim 7 is characterized in that: Adjusting the preset radius according to the number and position of the target base stations within the preset adjustment time, forming the adjusted radius includes: When the number of the target base stations is greater than a preset number threshold, obtaining the distance from the position of each target base station to the transmission point to form a number of transmission point distances; Calculating the standard deviation of all the transmission point distances to form a base station distribution degree; When the base station distribution degree is less than a preset standard distribution degree, the preset radius is adjusted according to a relative deviation between the preset standard distribution degree and the base station distribution degree and a preset first adjustment coefficient to form an adjusted radius.

9. The positioning information transmission method based on Beidou short message communication according to claim 8 is characterized in that: The preset synchronization threshold is adjusted according to the real-time transmission signal strength of the target base station within the preset adjustment time and the real-time transmission signal strength of the next adjacent transmission base station, and the adjustment synchronization threshold is formed including: Calculate the difference between the real-time transmission signal strength of the target base station and the real-time transmission signal strength of the next adjacent transmission base station to form a signal strength attenuation value; Calculating the standard deviation of the signal strength attenuation value to form an attenuation fluctuation value; When the attenuation fluctuation value is greater than the preset attenuation fluctuation threshold, the preset synchronization threshold is adjusted according to the relative deviation between the attenuation fluctuation value and the preset attenuation fluctuation threshold and a preset second adjustment coefficient to form the adjusted synchronization threshold.

10. A positioning information transmission system based on Beidou short message communication, based on the positioning information transmission method based on Beidou short message communication according to any one of claims 1 to 9, characterized in that: include: A first acquisition module is used to acquire the real-time transmission signal strength and real-time signal power of each transmission base station evenly arranged along the tunnel; an abnormality determination module, connected to the first acquisition module, for determining a number of abnormal base stations according to the real-time transmission signal strength and a preset signal strength threshold, and using each abnormal base station as a transmission point; A second acquisition module, connected to the abnormality determination module, is used to obtain the real-time vibration intensity of each transmission base station and the real-time deformation amount at the base station bracket within a circular range divided by a preset length with each transmitting point as the center; a temporary determination module, which is connected to the first acquisition module and the second acquisition module respectively, and is used to determine a number of temporary base stations according to the real-time vibration intensity, the real-time deformation amount and a preset synchronization threshold; A target determination module, connected to the temporary determination module, for determining a target base station according to the real-time signal power of any two adjacent temporary base stations and the position of a preset Beidou transmitting base station; an adjustment module, which is connected to the first acquisition module and the target determination module respectively, and is used to adjust the preset radius according to the number and position of the target base stations within the preset adjustment time to form an adjusted radius, or adjust the preset synchronization threshold according to the real-time transmission signal strength of the target base station within the preset adjustment time and the real-time transmission signal strength of the next transmission base station adjacent thereto to form an adjusted synchronization threshold; A Beidou transmission module is respectively connected to the abnormal determination module and the target determination module, and is used to transmit the positioning information of the abnormal base station to the target base station re-determined based on the adjustment radius or the adjustment synchronization threshold through a built-in Beidou short message device, and use the target base station as the next transmission point until the positioning information is transmitted to the preset Beidou transmitting base station.

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