Method and system for monitoring performance of a radio time service

Abstract

The application discloses a performance monitoring method and system of a radio time service system, and relates to the radio time service field.The method comprises the following steps: judging the working state of a monitoring receiver according to the working state information of the monitoring receiver and the state information of an external reference time frequency signal; when the working state of the monitoring receiver is normal, the monitoring receiver demodulates time service message parameters according to the received radio time service signal of the radio time service system, and measures signal quality parameters; the monitoring receiver takes a standard frequency signal as a reference input; the monitoring receiver receives the radio time service signal and outputs at least one 1PPS timing signal; a time difference measuring device measures the deviation between the 1PPS timing signal output by the receiver and a standard time 1PPS signal, and obtains a time service deviation; and the performance of the radio time service system is determined according to the time service deviation, the time service message parameters and the signal quality parameters.The application can realize unified and comprehensive monitoring of the radio time service system.

Description

Technical Field

[0001] This invention relates to the field of radio timing, and in particular to a method and system for monitoring the performance of a radio timing system. Background Technology

[0002] Time synchronization is the primary means of transmitting time values, enabling the transmission of high-precision standard time information from timekeeping laboratories to end users. Therefore, time synchronization is a crucial bridge connecting timekeeping and time usage. Radio time synchronization systems, such as satellite navigation systems, are the main physical entities for achieving time synchronization, undertaking the important task of time synchronization broadcasting, and are an important component of the national time and frequency system, representing a major national infrastructure.

[0003] The service performance of a radio time synchronization system, including accuracy, availability, continuity, and stability, is a crucial aspect of concern for both the system itself and its users. Monitoring is the primary method for objectively and accurately reflecting the performance of a radio time synchronization system. However, current monitoring methods are mainly tailored to specific types of time synchronization systems, resulting in inconsistent monitoring references, varying monitoring methods, incomplete monitoring content, and a lack of comparability between monitoring data.

[0004] In view of the aforementioned problems in the timing monitoring of current radio timing systems, and the urgent need to build an integrated space-ground timing system, it is imperative to propose a new performance monitoring method or system for radio timing systems. Summary of the Invention

[0005] The purpose of this invention is to provide a method and system for monitoring the performance of a radio timing system, which can achieve unified and comprehensive monitoring of the radio timing system.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] A method for monitoring the performance of a radio timing system includes:

[0008] The operating status of the monitoring receiver is determined based on the operating status information of the monitoring receiver and the status information of the external reference time and frequency signal; the operating status includes: normal or abnormal.

[0009] Once the monitoring receiver is in normal working condition, it demodulates the timing message parameters based on the received radio timing signal from the radio timing system and measures the signal quality parameters; the monitoring receiver uses a standard frequency signal as a reference input.

[0010] The monitoring receiver uses a standard frequency signal as a reference input, receives radio timing signals, and outputs a 1PPS timing signal; the time difference measurement device measures the time deviation between the standard time 1PPS signal and the 1PPS timing signal output by the monitoring receiver to determine the timing deviation.

[0011] The performance of a radio timing system is determined based on timing deviation, timing message parameters, and signal quality parameters.

[0012] Optionally, determining the operating status of the monitoring receiver based on the operating status information of the monitoring receiver and the status information of the external reference time and frequency signal specifically includes:

[0013] Determine whether the working status information and the external reference time and frequency signal status information are both normal;

[0014] If all are normal, then the receiver's working status is normal.

[0015] Conversely, if the receiver's operating status is abnormal, an alarm will be issued.

[0016] Optionally, determining the performance of the radio timing system based on timing deviation, timing message parameters, and signal quality parameters specifically includes:

[0017] Determine whether the signal quality parameters are within the set reception level;

[0018] If not, an alarm will be displayed;

[0019] If present, the performance of the radio timing system is determined based on the timing deviation and timing message parameters.

[0020] Optionally, if the condition is met, the performance of the radio timing system is determined based on the timing deviation and timing message parameters, specifically including:

[0021] Determine whether the timing message parameters exceed the message parameter threshold;

[0022] If the parameters are exceeded, the timing message parameters are abnormal, and an alarm will be issued.

[0023] If the parameters are within the range, then the timing message parameters are normal.

[0024] Optionally, if the condition is met, the performance of the radio timing system is determined based on the timing deviation and timing message parameters, specifically including:

[0025] Determine whether the difference between the same type of parameters broadcast in two adjacent time synchronization messages at the same time exceeds the difference threshold.

[0026] If the error exceeds the limit, a message will be broadcast indicating that the corresponding parameters are abnormal, and an alarm will be given.

[0027] Conversely, if the parameters for message broadcasting are normal, then the message will be broadcast normally.

[0028] Optionally, if the condition is met, the performance of the radio timing system is determined based on the timing deviation and timing message parameters, specifically including:

[0029] Determine whether the time synchronization deviation exceeds the time synchronization deviation threshold corresponding to the service accuracy of the time synchronization system;

[0030] If the time limit is exceeded, the timing performance of the radio timing system has not reached the corresponding service level, and an alarm will be issued.

[0031] A performance monitoring system for a radio timing system, comprising:

[0032] The working status judgment module is used to determine the working status of the monitoring receiver based on the working status information of the monitoring receiver and the status information of the external reference time and frequency signal; the working status includes: normal or abnormal.

[0033] The parameter demodulation module is used to demodulate the timing message parameters and measure the signal quality parameters based on the received radio timing signal from the radio timing system when the monitoring receiver is in normal working condition; the monitoring receiver uses a standard frequency signal as a reference input.

[0034] The timing deviation determination module is used to monitor the receiver receiving radio timing signals with a standard frequency signal as a reference input and outputting a 1PPS timing signal; the time difference measurement device measures the time deviation between the standard time 1PPS signal and the 1PPS timing signal output by the monitoring receiver to determine the timing deviation.

[0035] The performance determination module of the radio timing system is used to determine the performance of the radio timing system based on timing deviation, timing message parameters, and signal quality parameters.

[0036] A performance monitoring system for a radio timing system includes: at least one processor, at least one memory, and computer program instructions stored in the memory, which implement the method when the computer program instructions are executed by the processor.

[0037] A storage medium having computer program instructions stored thereon, which, when executed by a processor, implement the method.

[0038] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0039] This invention provides a performance monitoring method and system for a radio timing system. The monitoring receiver uses a standard frequency signal as a reference input, i.e., based on unified standard time and frequency resources, to comprehensively monitor the timing performance of the radio timing system from the perspectives of signal quality parameters, timing message parameters, and timing deviation. Real-time monitoring and analysis of the receiver's operating status ensures the validity of the monitoring data. This solves the problems of inconsistent monitoring references, inconsistent monitoring methods, incomplete monitoring content, and incomparable monitoring data in current timing monitoring. It achieves a unified evaluation of the timing performance of different radio timing systems using the same time scale, provides feedback on problems existing in the timing system, assists the timing system in adjusting its control and broadcasting strategies, provides users with feedback on the actual operating status of the radio timing system, and provides support for users to select timing methods and understand the performance of the timing system. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of a performance monitoring method for a radio timing system provided by the present invention;

[0042] Figure 2 The logic flowchart for determining the operating status of a wireless timing system. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] The purpose of this invention is to provide a method and system for monitoring the performance of a radio timing system, which can achieve unified and comprehensive monitoring of the radio timing system.

[0045] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] like Figure 1 As shown, the performance monitoring method for a radio timing system provided by the present invention includes:

[0047] S101, based on the operating status information of the monitoring receiver and the status information of the external reference time and frequency signal, determine the operating status of the monitoring receiver; the operating status includes: normal or abnormal; the monitoring receiver is a monitoring receiver with integrated time difference measurement function; or the monitoring receiver is actually a time synchronization monitoring device; the time synchronization monitoring device includes one monitoring receiver and one time difference measurement device. The monitoring receiver has an automatic alarm function when the external input time and frequency signal is abnormal and an alarm function for abnormal receiver operating status.

[0048] S101 specifically includes:

[0049] Determine whether the working status information and the external reference time and frequency signal status information are both normal;

[0050] If all are normal, then the receiver's working status is normal.

[0051] Conversely, if the receiver's operating status is abnormal, an alarm will be issued.

[0052] S102, when the monitoring receiver is in normal working condition, the monitoring receiver demodulates the timing message parameters according to the received radio timing signal from the radio timing system and measures the signal quality parameters; the monitoring receiver uses a standard frequency signal as a reference input; the standard frequency signal is a 10MHz frequency signal; and the position of the monitoring receiver is precisely known.

[0053] The monitoring receiver receives over-the-air radio timing signals, demodulates and outputs timing message parameters, signal quality parameters and other data, and at the same time outputs at least one 1PPS timing signal.

[0054] Different radio timing systems contain different timing message parameters.

[0055] The timing message parameters of a satellite navigation system include: UTCO parameters, satellite clock parameters, ephemeris parameters, ionospheric parameters, and TGD parameters.

[0056] Longwave time message parameters include: GTP deviation, transmission deviation, and time code;

[0057] Other radio timing systems primarily use time codes as the timing message parameter.

[0058] Signal quality parameters include: signal-to-noise ratio, field strength, bit error rate, etc.

[0059] S103, the monitoring receiver determines the time discrepancy based on the radio time signal and the standard time signal;

[0060] The standard 10MHz frequency signal provides a measurement reference for the time difference measurement equipment. The deviation between the 1PPS timing signal output by the receiver and the standard time 1PPS signal is measured and monitored in real time to obtain the time synchronization deviation.

[0061] S104 determines the performance of the radio timing system based on timing deviation, timing message parameters, and signal quality parameters.

[0062] As a specific embodiment, S104 specifically includes:

[0063] Determine whether the signal quality parameters are within the set reception level;

[0064] If not, an alarm will be displayed;

[0065] If present, the performance of the radio timing system is determined based on the timing deviation and timing message parameters.

[0066] As a specific embodiment, S104 specifically includes:

[0067] Determine whether the timing message parameters exceed the message parameter threshold;

[0068] If the parameters are exceeded, the timing message parameters are abnormal, and an alarm will be issued.

[0069] If the parameters are within the range, then the timing message parameters are normal.

[0070] As a specific embodiment, S104 specifically includes: determining whether the difference between the same type of parameters broadcast by two adjacent sets of time synchronization messages at the same time exceeds the difference threshold;

[0071] If the error exceeds the limit, a message will be broadcast indicating that the corresponding parameters are abnormal, and an alarm will be given.

[0072] Conversely, if the parameters for message broadcasting are normal, then the message will be broadcast normally.

[0073] As a specific embodiment, S104 specifically includes: determining whether the timing deviation exceeds the timing deviation threshold corresponding to the service accuracy of the timing system;

[0074] If the time limit is exceeded, the timing performance of the radio timing system has not reached the corresponding service level, and an alarm will be issued.

[0075] This embodiment uses the timing performance monitoring of a long-wavelength timing system as an example for illustration. The following is a detailed explanation in conjunction with the appendix. Figure 2 The present invention is further illustrated by the embodiments described below, and the present invention includes, but is not limited to, the following embodiments.

[0076] Step 1: Place the longwave time synchronization performance monitoring equipment, including a longwave monitoring receiver and a time difference measurement device, at the monitoring site. The receiver antenna is installed on a base pier at a known location. The monitoring receiver is connected to a standard 10MHz frequency signal, and the time difference measurement device is connected to a standard 1PPS time signal and a 10MHz frequency signal.

[0077] Step 2: The longwave monitoring receiver receives the longwave time signal in the air, demodulates and outputs data such as time message parameters and signal quality parameters, and outputs at least one 1PPS timing signal.

[0078] Step 3: The standard 10MHz frequency signal provides a measurement reference for the time difference measurement equipment. The deviation between the 1PPS timing signal output by the long-wave monitoring receiver and the standard time 1PPS signal is measured in real time to obtain the time synchronization deviation.

[0079] Step 4: Real-time analysis of the operating status information of the output longwave monitoring receiver and the status information of the external reference time and frequency signal. When there are no alarms in either, the longwave monitoring receiver is judged to be operating normally; if either is abnormal, the longwave monitoring receiver is judged to be operating abnormally.

[0080] Step 5: For longwave signal quality parameters, including signal-to-noise ratio, field strength, and packet error, determine the power, signal strength, and waveform of the received longwave timing signal. Determine if the signal-to-noise ratio, field strength, and packet error are within normal reception levels; otherwise, issue an alarm.

[0081] Step 6: For the time code and transmission deviation of the long-wave time synchronization message parameters, compare whether the time code obtained from the message parsing is consistent with the reference time code. If they are inconsistent, it indicates that the long-wave time synchronization message transmission parameter is abnormal. Compare the relationship between the message parsing transmission deviation and the transmission signal timing accuracy (1μs). If the former is greater than the latter, give an alarm prompt.

[0082] Step 7: The service accuracy of the long-wave time synchronization system is better than 100μs. Analyze whether the time synchronization deviation is within ±100μs. If it exceeds the range, it means that the time synchronization performance of the long-wave time synchronization system does not meet the promised service accuracy, and an alarm prompt will be given.

[0083] Step 8: Based on the analysis results in steps 4 to 7, conduct a comprehensive analysis according to the following logic.

[0084] If step 4 issues an alarm, the longwave monitoring receiver is malfunctioning. In this case, the monitoring data is invalid, and the timing performance of the longwave timing system cannot be analyzed based on the monitoring data.

[0085] If no alarm is given in step 5, then the longwave timing signal coverage around the monitoring environment is normal, the electromagnetic environment is good and there is no interference, and the longwave monitoring receiver receives the signal normally.

[0086] The following judgment logic is derived under the premise that no alarm prompts are given in steps 4 and 5:

[0087] If step 6 provides an alarm but step 7 does not, it indicates that the longwave timing message parameters are being broadcast abnormally. This could be due to abnormal time code information or the accuracy of the broadcast signal timing exceeding the control range. However, this abnormal parameter does not affect the timing performance of the longwave timing system. If both steps 6 and 7 provide alarms, it indicates that at least some message parameters of the longwave timing system are being broadcast abnormally and the timing performance of the longwave timing system is degraded.

[0088] If no alarm is given in step 6 but an alarm is given in step 7, it means that the longwave time synchronization system is broadcasting time synchronization message parameters normally, but the time synchronization performance of the longwave time synchronization system has degraded, and the time synchronization system has not given an alarm in time; if no alarm is given in step 6 and no alarm is given in step 7, it means that the time synchronization system is operating normally.

[0089] Step 9: When no less than 3 sets of long-wave time synchronization monitoring equipment are running simultaneously, first judge the monitoring data of each set of monitoring equipment according to steps 1 to 8, combine the monitoring results of multiple sets of monitoring equipment, and give the final monitoring conclusion of the time synchronization performance of the long-wave time synchronization system according to the principle of majority rule.

[0090] As can be seen from the above embodiments, the main feature of this invention is that it uses a unified standard time and frequency signal as the reference input for monitoring, and uses monitoring equipment to receive radio timing signals to obtain monitoring data. Through the analysis of the monitoring data and anomaly judgment logic, the timing performance and operating status of the timing system are accurately reflected.

[0091] Corresponding to the above method, the present invention provides a performance monitoring system for a radio timing system, comprising:

[0092] The working status judgment module is used to determine the working status of the monitoring receiver based on the working status information of the monitoring receiver and the status information of the external reference time and frequency signal; the working status includes: normal or abnormal.

[0093] The parameter demodulation module is used to demodulate the timing message parameters and measure the signal quality parameters based on the received radio timing signal from the radio timing system when the monitoring receiver is in normal working condition; the monitoring receiver uses a standard frequency signal as a reference input.

[0094] The timing deviation determination module is used to monitor the receiver receiving radio timing signals with a standard frequency signal as a reference input and outputting a 1PPS timing signal; the time difference measurement device measures the time deviation between the standard time 1PPS signal and the 1PPS timing signal output by the monitoring receiver to determine the timing deviation.

[0095] The performance determination module of the radio timing system is used to determine the performance of the radio timing system based on timing deviation, timing message parameters, and signal quality parameters.

[0096] In order to execute the method corresponding to Embodiment 1 above and achieve the corresponding functions and technical effects, the present invention also provides a performance monitoring system for a radio timing system, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory, wherein the method is implemented when the computer program instructions are executed by the processor.

[0097] Based on the above description, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned computer storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory, random access memory, magnetic disks, or optical disks.

[0098] Compared to existing radio time synchronization system performance monitoring technologies, this invention features unified monitoring references, consistent monitoring methods, comprehensive monitoring content, and comparable monitoring data. Currently, monitoring is a component of radio time synchronization systems such as satellite navigation systems, longwave, shortwave, and low-frequency time codes. Monitoring data is only used for broadcast monitoring and operational status monitoring of the time synchronization system and is not shared externally. The monitoring methods and references differ for each time synchronization system, leading to a lack of comparability between monitoring data and a lack of unified third-party monitoring to achieve unified and comprehensive monitoring of radio time synchronization systems.

[0099] This method is applicable to performance monitoring of radio timing methods such as satellite navigation, longwave, shortwave, and low-frequency time codes. To ensure the continuity and reliability of monitoring data, at least three sets of monitoring equipment should be deployed at the same monitoring site. Compared to traditional internal monitoring within a timing system, this method is an independent third-party monitoring method with a unified time reference. Internal monitoring within a timing system is mostly in-field monitoring, while this method is not limited by monitoring location, enabling both in-field and far-field monitoring of timing signals, comprehensively reflecting the performance of the timing system in different geographical and airspace regions. Internal monitoring within a timing system only serves a single system and is not shared; the data monitored by this method is fed back to each timing system to assist its operation, and is also shared with users, allowing them to monitor the operational status of each timing system.

[0100] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0101] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method of performance monitoring of a radio time service, characterized in that, The method comprises the steps of: determining the working state of the monitoring receiver according to the working state information of the monitoring receiver and the state information of the external reference time frequency signal; the working state comprises: normal or abnormal; after the working state of the monitoring receiver is determined as normal, the monitoring receiver demodulates the time service text parameters according to the received radio time service signal of the radio time service system, and measures the signal quality parameters; the monitoring receiver takes the standard frequency signal as the reference input; the monitoring receiver takes the standard frequency signal as the reference input, receives the radio time service signal, and outputs the 1PPS timing signal; the time difference measuring device measures the time deviation between the standard time 1PPS signal and the 1PPS timing signal output by the monitoring receiver, and determines the time service deviation; determining the performance of the radio time service system according to the time service deviation, the time service text parameters and the signal quality parameters.

2. The method of claim 1, wherein the step of determining the performance of the radio time transfer system comprises the steps of: The step of determining the working state of the monitoring receiver according to the working state information of the monitoring receiver and the state information of the external reference time frequency signal comprises the steps of: ​ determining whether the working state information and the state information of the external reference time frequency signal are both normal; if both are normal, the working state of the monitoring receiver is normal; otherwise, the working state of the monitoring receiver is abnormal, and an alarm prompt is given.

3. The performance monitoring method for a radio timing system according to claim 1, characterized in that, The step of determining the performance of the radio time service system according to the time service deviation, the time service text parameters and the signal quality parameters comprises the steps of: determining whether the signal quality parameters are within the set receiving level; if not, an alarm prompt is given; if yes, the performance of the radio time service system is determined according to the time service deviation and the time service text parameters.

4. The performance monitoring method for a radio timing system according to claim 3, characterized in that, The step of determining the performance of the radio time service system according to the time service deviation and the time service text parameters if yes comprises the steps of: determining whether the time service text parameters exceed the text parameter threshold; if yes, the time service text parameters are abnormal, and an alarm prompt is given; if no, the time service text parameters are normal.

5. The performance monitoring method for a radio timing system according to claim 3, characterized in that, The step of determining the performance of the radio time service system according to the time service deviation and the time service text parameters if yes further comprises the steps of: determining whether the difference between the same type parameters of adjacent two groups of time service text broadcast at the same time exceeds the difference threshold; if yes, the corresponding parameters of the text broadcast are abnormal, and an alarm prompt is given; otherwise, the corresponding parameters of the text broadcast are normal.

6. The performance monitoring method for a radio timing system according to claim 3, characterized in that, The step of determining the performance of the radio time service system according to the time service deviation and the time service text parameters if yes comprises the steps of: determining whether the time service deviation exceeds the time service deviation threshold corresponding to the service precision of the time service system; if yes, the time service performance of the radio time service system does not reach the corresponding service level, and an alarm prompt is given.

7. A performance monitoring system for a radio time service system, characterized in that The device comprises: a working state determining module, configured to determine the working state of the monitoring receiver according to the working state information of the monitoring receiver and the state information of the external reference time frequency signal; the working state comprises: normal or abnormal; a parameter demodulating module, configured to, after the working state of the monitoring receiver is determined as normal, demodulate the time service text parameters according to the received radio time service signal of the radio time service system, and measure the signal quality parameters; the monitoring receiver takes the standard frequency signal as the reference input; The time service bias determination module is configured to monitor a receiver to receive a radio time service signal as a reference input of a standard frequency signal, and output a 1PPS timing signal; a time difference measurement device measures a time difference between the standard time 1PPS signal and the 1PPS timing signal output by the monitoring receiver, and obtains a time service bias; The performance determination module of the radio time service system is configured to determine the performance of the radio time service system according to the time service bias, the time service message parameters and the signal quality parameters.

8. A performance monitoring system for a radio time service system, characterized in that The method comprises: at least one processor, at least one memory, and computer program instructions stored in the memory, which, when executed by the processor, implement the method of any one of claims 1-6.

9. A storage medium having stored thereon computer program instructions, characterized in that, The computer program instructions, when executed by the processor, implement the method of any one of claims 1-6.

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