TWI793924B - Sysetem and method for monitoring remote device online time synchronization accurancy - Google Patents

Abstract

A system and method for monitoring remote device online time synchronization is provided, including a transceiver, a storage media and a processor. The storage media stores network management module, channel scheduling module and time measurement module. The channel scheduling module receives a control signal from the network management module and a plurality of time signals to be tested from a plurality of users, and schedules the time signals to be measured according to the control signal. The time measurement module sequentially receives the scheduled time signals to be measured, performs time measurement according to the measurement reference signal and the plurality of the time signals to be measured to obtain a plurality of time measurement results and sent the plurality of time measurement results to the network management module, the network management module is used to set a time difference threshold, receives the plurality of time measurement results and compares the plurality of time measurement results according to the time difference threshold to determine whether to send an alarm signal.

Description

Monitoring system and method for online time synchronization accuracy of remote equipment

The present invention relates to online time monitoring of remote equipment, and in particular to a monitoring system and method for online time synchronization accuracy of remote equipment.

Time synchronization is an indispensable technology in the communication network. The telecommunications industry, financial industry, industry, aviation industry and national defense industry all have high-precision time synchronization requirements. In order to meet this requirement, how network devices receive high-precision time signals is crucial. The current technology for obtaining high-precision time signals includes: receiving time signals transmitted by upstream equipment through Precision Time Protocol (Precision Time Protocol, PTP) and directly obtaining world standards through Global Navigation Satellite System (GNSS) receivers time.

However, the above-mentioned technologies all have potential stability issues, which may further affect the quality of time signals and network services. The system obtains universal time, and its signal quality may be affected by weather, interference from the installation environment, or man-made sabotage, malicious deception, etc. In addition, how to effectively manage the time signal quality of many network devices in the network is also an important issue.

According to past experience, there may be many reasons for mobile network obstacles or quality degradation, and it takes a lot of time to clarify, especially the degradation of synchronization quality drifting gradually, which is even more difficult to control, and even needs to bring various instruments to the site. The nodes are measured and clarified one by one. The 5G mobile base station requires strict time synchronization accuracy. For example, according to different application requirements according to international telecommunication standards, the accuracy error between the time of the base station and the world standard time must be less than 130ns~1,500ns. If the time synchronization accuracy is slightly deviated, the base station can still operate, but it may interfere with or fail to interoperate with adjacent base stations, which will affect the service quality and performance. If the deviation is serious, the base station may not be able to serve at all.

The present invention provides a remote device online time synchronization accuracy monitoring system and method thereof, which can provide remote devices with real-time monitoring of time synchronization accuracy, serve multiple devices at the same time, and effectively improve time synchronization monitoring efficiency.

A monitoring system for online time synchronization accuracy of remote equipment of the present invention includes: a transceiver, a storage medium, and a processor. The storage medium stores multiple modules. The processor is coupled to the storage medium and the transceiver, and accesses and executes the modules, wherein the modules include: a network management module, a channel scheduling module and a time measurement module. The channel scheduling module is coupled with the network management module, and the channel scheduling module communicates with multiple users to receive control signals from the network management module and multiple waiting times of these users signals, and schedule the time signals to be tested according to the control signals. The time measurement module is respectively coupled with the network management module and the channel scheduling module. The time measurement module sequentially receives the time signals to be measured after being scheduled by the channel scheduling module, and according to the measurement standard The signals are respectively measured with these time signals to obtain multiple time measurement results and sent to the network management module, wherein the network management module is used to set the time difference threshold, and the network management The module receives the time measurement results and compares them with the time measurement results respectively according to the time difference threshold to determine whether to issue an alarm signal.

In an embodiment of the present invention, the above-mentioned remote device online time synchronization accuracy monitoring system, wherein the measurement reference signal is a ToD (Time of Day) reference signal or a Global Navigation Satellite System (Global Navigation Satellite System, GNSS) receiver transmits the universal time signal.

In an embodiment of the present invention, the above-mentioned online time synchronization accuracy monitoring system of remote equipment further includes a clock source synchronization module, which receives a measurement reference signal through a transceiver and transmits it to the time measurement module.

In an embodiment of the present invention, the above-mentioned online time synchronization accuracy monitoring system for remote equipment, wherein the time signals to be measured include Precision Time Protocol (Precision Time Protocol, PTP), Common Public Radio Interface (Common Public Radio Interface, CPRI) or enhanced common public radio interface (enhanced CPRI, eCPRI) packet time stamp data.

In an embodiment of the present invention, the above-mentioned remote device online time synchronization accuracy monitoring system, wherein the channel scheduling module supports L1 optical layer transparent (Bypass), L2 Ethernet (Ethernet), multiple communication Protocol Label Switching - Transport Profile (Multiprotocol Label Switching - Transport Profile, MPLS-TP) or L3 Internet Protocol/Multiprotocol Label Switching - Transport Profile (Internet Protocol/ Multiprotocol Label Switching, IP/MPLS) network channel settings, to communicate with the users respectively.

In an embodiment of the present invention, the above-mentioned online time synchronization accuracy monitoring system for remote devices, wherein the network management module supports Network Management System (NMS), Element Management System (Element Management System, EMS) and a network element control protocol for Software Defined Network (SDN).

A monitoring method for online time synchronization accuracy of a remote device of the present invention, comprising: receiving a control signal and a plurality of time signals to be measured from multiple users, scheduling these time signals to be measured according to the control signal; receiving in sequence After scheduling the time signals to be measured, perform time measurement with the time signals to be measured according to the measurement reference signal to obtain multiple time measurement results; and set the time difference threshold value, respectively Compare with these time measurement results to decide whether to issue an alarm signal.

In an embodiment of the present invention, the above-mentioned method for monitoring online time synchronization accuracy of remote equipment, wherein the measurement reference signal is a ToD (Time of Day) reference signal or a Global Navigation Satellite System (Global Navigation Satellite System, GNSS) receiver transmits the universal time signal.

In an embodiment of the present invention, the above-mentioned method for monitoring the online time synchronization accuracy of remote equipment, wherein the time signals to be measured include Precision Time Protocol (Precision Time Protocol, PTP), Common Public Radio Interface (Common Public Radio Interface, CPRI) or enhanced common public radio interface (enhanced CPRI, eCPRI) packet time stamp data.

Based on the above, the monitoring system and method for online time synchronization accuracy of remote devices of the present invention can remotely and online measure and synchronize the time of multiple network devices, effectively reduce the error with the world standard time, and improve the measurement Accuracy is conducive to locating the abnormal occurrence point and sending an alarm signal to immediately notify the maintenance personnel to repair when the time synchronization abnormality occurs, effectively improving the efficiency of time synchronization monitoring.

Parts of the embodiments of the present invention will be described in detail with reference to the accompanying drawings. For the referenced reference symbols in the following description, when the same reference symbols appear in different drawings, they will be regarded as the same or similar components. These embodiments are only a part of the present invention, and do not reveal all possible implementation modes of the present invention. More precisely, these embodiments are just examples of the method, electronic device and computer-readable storage medium within the scope of the patent application of the present invention.

FIG. 1 is a schematic diagram of a monitoring system for online time synchronization accuracy of a remote device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a storage medium according to an embodiment of the invention.

Please refer to FIG. 1 and FIG. 2 , the monitoring system 10 for online time synchronization accuracy of remote equipment includes a transceiver 110 , a storage medium 120 and a processor 130 . The monitoring system 10 for online time synchronization accuracy of remote devices is suitable for monitoring the time of multiple remote devices connected to it through communication, and the present invention is not limited thereto.

The transceiver 110 transmits and receives signals in a wireless or wired manner. The transceiver 110 may also perform operations such as low noise amplification, impedance matching, frequency mixing, up or down frequency conversion, filtering, amplification, and the like.

The storage medium 120 is, for example, any type of fixed or removable random access memory (random access memory, RAM), read-only memory (read-only memory, ROM), flash memory (flash memory) , hard disk drive (hard disk drive, HDD), solid state drive (solid state drive, SSD) or similar components or a combination of the above components, the storage device 120 is used to record a plurality of instructions that can be executed by the processor 130, and is also used to store A plurality of modules or various application programs executable by the processor 130 . In this embodiment, the storage medium 120 can store multiple modules including a clock source synchronization module 1201, a network management module 1202, a channel scheduling module 1203, and a time measurement module 1204, and the network management module Group 1202, channel scheduling module 1203, and time measurement module 1204 form a remote measurement module 121 for performing time measurement on remote devices 20 (such as user 1, user 2 . . . user n) , its function will be explained later.

The processor 130 is, for example, a central processing unit (central processing unit, CPU), or other programmable general purpose or special purpose micro control unit (micro control unit, MCU), microprocessor (microprocessor), digital signal processing Digital signal processor (DSP), programmable controller, application specific integrated circuit (ASIC), graphics processing unit (graphics processing unit, GPU), arithmetic logic unit (arithmetic logic unit, ALU) , complex programmable logic device (complex programmable logic device, CPLD), field programmable logic gate array (field programmable gate array, FPGA) or other similar components or a combination of the above components. The processor 130 can be coupled to the storage medium 120 and the transceiver 110, and access and execute a plurality of modules and various application programs stored in the storage medium 120, so as to control the monitoring system 10 of online time synchronization accuracy of remote devices overall operation.

FIG. 3 is a schematic diagram of a communication connection between a monitoring system for online time synchronization accuracy of a remote device and a user according to an embodiment of the present invention. FIG. 4 and FIG. 5 are respectively schematic diagrams of the user clock source module obtaining the world standard time and providing it to the user according to an embodiment of the present invention.

Please refer to Fig. 3, the user clock source module 1, the user clock source module 2 ... the user clock source module n respectively obtain the world standard time as its clock 101, clock 102 ... clock 103, and provide the remote Each user (user 1 , user 2 . . . user n) in the end device 20 is respectively used as the user clock 201 , user time 202 . . . user time 203 of each user.

Please refer to FIG. 4, in one embodiment, the user clock source module can communicate with the GNSS 30 via the PTP network 303, the PTP master clock 302, and the Global Navigation Satellite System (GNSS) receiver 301 to receive Precision Time Protocol (PTP) signal to obtain the world standard time provided by GNSS30. Please refer to FIG. 5. In another embodiment, the user clock source module can be directly connected to the GNSS30 through the GNSS receiver 301 to receive the ToD (Time of Day) reference signal for measurement, so as to obtain the world information provided by the GNSS30. standard Time. In this way, user 1 is connected to user clock source module 1, user clock source module 1 transmits PTP signal or ToD reference signal according to its clock 101, user 1 obtains user clock 201 after analyzing the signal, and user 2 Connect with user clock source module 2, user clock source module 2 transmits PTP signal or ToD reference signal according to its clock 102, user 2 gets user clock 202 after analyzing this signal, and so on, user n and The user clock source module n is connected, and the user clock source module n transmits a PTP or ToD reference signal according to its clock 103, and the user n analyzes the signal to obtain the user clock 203, thereby obtaining multiple time signals to be measured, and Send multiple time signals to be measured to the remote measurement module 121 respectively. The plurality of time signals to be measured include time stamps packetized with Precision Time Protocol (Precision Time Protocol, PTP), Common Public Radio Interface (CPRI), or enhanced Common Public Radio Interface (enhanced CPRI, eCPRI) Data (such as user clock 201, user clock 202...user clock 203). In the process of analyzing data or in signal transmission, there may be signal delay, poor design of time synchronization correction algorithm, etc., resulting in the difference between user clock 201, user clock 202, user clock 203 and the universal standard There is an error between the user clocks 201, 202, 203 and the universal standard time, resulting in different degrees of time deviation.

FIG. 6 and FIG. 7 are respectively schematic diagrams of a clock source synchronization module acquiring a measurement reference signal and transmitting it to a remote measurement module according to an embodiment of the present invention.

The remote measurement module 121 is connected to the clock source synchronization module 1201 , and the clock source synchronization module 1201 receives the measurement reference signal through the transceiver 110 and transmits it to the remote measurement module 121 .

Please refer to Figure 6. In one embodiment, the clock source synchronization module 1201 can communicate with the GNSS 30 through the PTP master clock 302 and the GNSS receiver 301 to receive the PTP signal, thereby obtaining the world standard time provided by the GNSS 30 and adjusting the measurement reference signal. Calibrate to achieve the synchronization of the measurement reference signal with the world standard time provided by the GNSS30, and transmit the measurement reference signal to the remote measurement module 121. Please refer to Figure 7. In one embodiment, the clock source synchronization module 1201 can communicate with the GNSS 30 through the GNSS receiver 301 to receive the ToD reference signal, so as to obtain the world standard time provided by the GNSS 30 , and adjust the measurement reference signal to achieve The measurement reference signal is synchronized with the world standard time provided by the GNSS 30 , and the measurement reference signal is sent to the remote measurement module 121 .

Please refer to FIG. 3 again, the clock source synchronization module 1201 transmits the measurement reference signal to the remote measurement module 121 according to its clock 104, and the remote measurement module 121 compares the measurement reference signal with the remote device 20 (using User 1 , user 2 . . . user n) respectively obtain multiple time signals to be tested for subsequent scheduling of multiple time signals to be tested and measurement of the time difference between each user's clock relative to the universal standard time.

Referring to FIG. 2 again, the channel scheduling module 1203 is coupled to the network management module 1202, and the channel scheduling module 1203 communicates with the remote device 20 (user 1, user 2 . . . user n), To receive the control signal of the network management module 1202 and multiple time signals to be tested, and schedule the multiple time signals to be tested according to the control signal. Among them, the channel scheduling module 1203 can flexibly determine the scheduling priority of each channel corresponding to each user and automatically monitor the scheduling period according to the control signal, and transmit the time signal to be measured of each channel to the time measurement The module 1204 measures the time difference with the measurement reference signal respectively. Among them, the channel scheduling module 1203 supports L1 optical layer transparent (Bypass), L2 Ethernet (Ethernet), Multiprotocol Label Switching-Transport Profile (Multiprotocol Label Switching - Transport Profile, MPLS-TP) or L3 Internet Protocol /Multiprotocol Label Switching-transmitting files (Internet Protocol/Multiprotocol Label Switching, IP/MPLS) network channel settings to communicate with user 1, user 2...user n respectively.

The time measurement module 1204 is coupled with the network management module 1202 and the channel scheduling module 1203 respectively, and the time measurement module 1204 receives a plurality of time signals scheduled by the channel scheduling module 1203 sequentially, And according to the measurement reference signal and the measurement of the time difference between the multiple time signals to be measured, to obtain multiple time measurement results (corresponding to the time difference of the multiple time signals to be measured), and send them to the network management module 1202. In one embodiment, multiple time signals to be measured are analyzed and obtained from time stamp data in PTP, CPRI or eCPRI packets (such as user clock 201, user clock 202...user clock 203), so as to obtain corresponding The user's user clock, the time measurement module 1204 measures the time difference of each user clock relative to the universal standard time according to the measurement reference signal and multiple time signals to be measured, and sends the time measurement result to the network management Module 1202 records and stores.

The network management module 1202 is further used to set the time difference threshold, and the network management module 1202 receives the above time measurement results, and compares them with the above time measurement results according to the time difference threshold to determine whether to send an alarm signal. Among them, the network management module supports network management system (Network Management System, NMS), element management system (Element Management System, EMS) and software defined network (Software Defined Network, SDN) network element control protocol. In one embodiment, the network management module 1202 can set the time difference threshold, for example, when measuring the time difference between one of the user's clocks relative to the universal standard time (that is, when there is an error in synchronization between the user's clock and the universal standard time ) exceeds the set time difference threshold value, the network management module 1202 sends out an alarm signal to remind the maintenance personnel to deal with it.

FIG. 8 is a schematic flowchart of a method for monitoring online time synchronization accuracy of a remote device according to an embodiment of the present invention. The method for monitoring the accuracy of online time synchronization of remote devices can be implemented by the monitoring system 10 for online time synchronization accuracy of remote devices as shown in FIGS. 1 to 7 .

In step S501, the clock source synchronization module 1201 receives the measurement reference signal through the transceiver 110, wherein the clock source synchronization module 1201 receives the world standard time signal provided by the GNSS30 through the transceiver 110 to adjust the measurement reference signal Calibrate to achieve the synchronization of the measurement reference signal with the world standard time.

In step S502, the channel scheduling module 1203 receives the control signal from the network management module 1202 and multiple time signals to be tested from multiple users, and schedules the time signals to be tested according to the control signals. A plurality of time signals to be measured are time stamp data obtained from PTP, CPRI or eCPRI packets (such as user clock 201 , user clock 202 . . . user clock 203 ) and are analyzed to obtain user clocks corresponding to each user.

In step S503 , the time measurement module 1204 sequentially receives the scheduled time signal to be measured, and performs time measurement with the time signal to be measured according to the measurement reference signal to obtain multiple time measurement results. In one embodiment, the time measurement module 1204 performs time measurement according to the measurement reference signal and the time signal to be measured respectively, so as to obtain the time difference corresponding to the time signal to be measured respectively (that is, the user clock is synchronized with the world standard time error).

In step S504, the network management module 1202 sets the time difference threshold value, compares the time difference threshold value with the time measurement results (for example, the time difference corresponding to the time signal to be measured), and determines that it corresponds to one of the time signal to be measured Whether the time difference is less than the time difference threshold to determine whether to issue an alarm signal.

In step S505, if the time difference corresponding to one of the time signals to be measured is smaller than the time difference threshold, then end.

In step S506, if the time difference corresponding to one of the time signals to be measured is not less than the time difference threshold, an alarm signal is issued.

To sum up, the online time synchronization accuracy monitoring system and method of the remote equipment of the present invention, when the time difference of one of the time signals to be measured is not less than the time difference threshold value, the monitoring system for the online time synchronization accuracy of the remote equipment It will send out an alarm signal and immediately notify the maintenance personnel to repair it. It can not only measure and synchronize the time of multiple network devices remotely and online, but also effectively reduce the error with the world standard time, improve the measurement accuracy, and facilitate the occurrence of abnormal time synchronization. Real-time positioning of abnormal occurrence points and sending out alarm signals to immediately notify maintenance personnel to repair, effectively improving the efficiency of time synchronization monitoring.

10: Monitoring system for online time synchronization accuracy of remote equipment 110: Transceiver 120: storage media 130: Processor 1, 2, n: user, user clock source module 101, 102, 103, 104: Clock 201, 202, 203: user clock 121:Remote measurement module 1201: Clock source synchronization module 1202: Network management module 1203: Channel scheduling module 1204: Time measurement module 20: Remote device 30: Global Satellite System 301: GNSS receiver 302: PTP main clock 303: PTP network S501-S506: Steps

FIG. 1 is a schematic diagram of a monitoring system for online time synchronization accuracy of a remote device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a storage medium according to an embodiment of the invention. FIG. 3 is a schematic diagram of a communication connection between a monitoring system for online time synchronization accuracy of a remote device and a user according to an embodiment of the present invention. FIG. 4 and FIG. 5 are respectively schematic diagrams of the user clock source module obtaining the world standard time and providing it to the user according to an embodiment of the present invention. FIG. 6 and FIG. 7 are respectively schematic diagrams of a clock source synchronization module acquiring a measurement reference signal and transmitting it to a remote measurement module according to an embodiment of the present invention. FIG. 8 is a schematic flowchart of a method for monitoring online time synchronization accuracy of a remote device according to an embodiment of the present invention.

S501-S506: Steps

Claims (7)

A monitoring system for online time synchronization accuracy of remote equipment, including: a transceiver; a storage medium, storing multiple modules; and a processor, coupled to the storage medium and the transceiver, and accessing and executing the modules , wherein these modules include: a network management module; a channel scheduling module, coupled with the network management module, and the channel scheduling module is respectively connected to a plurality of users for receiving the network The control signal of the road management module and the multiple time signals to be tested of these users, and schedule these time signals to be tested according to the control signal; and the time measurement module, respectively connected with the network management module group, the channel scheduling module is coupled, the time measurement module sequentially receives the time signals to be measured after being scheduled by the channel scheduling module, and respectively compares the time signals to be measured according to the measurement reference signal The signal performs time measurement to obtain multiple time measurement results and sends them to the network management module, wherein the measurement reference signal is a ToD (Time of Day) reference signal or a Global Navigation Satellite System (Global Navigation Satellite System) for measurement System, GNSS) receiver transmits the world standard time signal, wherein, the network management module is further used to set the time difference threshold value, and the network management module receives the time measurement results, according to the time difference threshold value respectively Compare with these time measurement results to decide whether to issue an alarm signal. The monitoring system for online time synchronization accuracy of remote equipment as described in claim 1, wherein the system further includes: a clock source synchronization module, which receives the measurement reference signal through the transceiver and transmits it to the time measurement module . The monitoring system for online time synchronization accuracy of remote equipment as described in claim 1, wherein the time signals to be measured include Precision Time Protocol (Precision Time Protocol, PTP), Common Public Radio Interface (Common Public Radio Interface, CPRI) ) or enhanced common public radio interface (enhanced CPRI, eCPRI) packet time stamp data. The monitoring system for online time synchronization accuracy of remote equipment as described in request item 1, wherein the channel scheduling module supports L1 optical layer transparent (Bypass), L2 Ethernet (Ethernet), multiple protocol label switching -Transfer file (Multiprotocol Label Switching-Transport Profile, MPLS-TP) or L3 Internet Protocol/Multiprotocol Label Switching-Transmission file (Internet Protocol/Multiprotocol Label Switching, IP/MPLS) network channel setting, to respectively communicate with the some user communication connections. The monitoring system for online time synchronization accuracy of remote equipment as described in claim 1, wherein the network management module supports network management system (Network Management System, NMS), element management system (Element Management System, EMS) and Network element control protocol for Software Defined Network (SDN). A monitoring method for online time synchronization accuracy of remote equipment, comprising: receiving a control signal and multiple time signals to be measured from multiple users, and scheduling the time signals to be tested according to the control signal; receiving the scheduled time signals in sequence The time signals to be measured after the process, and perform time measurement with the time signals to be measured according to the measurement reference signal to obtain multiple time measurement results, wherein the measurement reference signal is the measurement using ToD(Time of Day) reference signal or the global standard time signal transmitted by the Global Navigation Satellite System (GNSS) receiver; and setting the time difference threshold value, and comparing the time difference threshold value with the time measurement results respectively, so as to Decide whether to issue an alarm signal. The monitoring method for online time synchronization accuracy of remote equipment as described in claim 6, wherein the time signals to be measured include Precision Time Protocol (Precision Time Protocol, PTP), Common Public Radio Interface (Common Public Radio Interface, CPRI) ) or enhanced common public radio interface (enhanced CPRI, eCPRI) packet time stamp data.

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