WO2012088931A1

WO2012088931A1 - Method and device for monitoring time synchronization

Info

Publication number: WO2012088931A1
Application number: PCT/CN2011/080086
Authority: WO
Inventors: 陈聪
Original assignee: 华为技术有限公司
Priority date: 2010-12-29
Filing date: 2011-09-23
Publication date: 2012-07-05
Also published as: CN102098121A; CN102098121B

Abstract

Disclosed are a method and a device for monitoring time synchronization, which relate to the communications technology, so as to solve the problem in the prior art that time synchronization cannot be monitored in real time. The technical solution provided in an embodiment of the present invention comprises: receiving a precision time protocol 1588v2 time signal, and acquiring a precision time protocol 1588v2 time stamp of the precision time protocol 1588v2 time signal; performing frequency locking and phase locking on the precision time protocol 1588v2 time stamp, so as to obtain a precision time protocol 1588v2 pulse per second (PPS) of the precision time protocol 1588v2 time signal; performing phase detection on the precision time protocol 1588v2 PPS and a satellite PPS of a satellite signal, so as to obtain a decimal part of a precision time protocol 1588v2 time deviation of a base station; and reporting the decimal part of the precision time protocol 1588v2 time deviation. The embodiments of the present invention may be applied in industrial automation, measurement, and communications procedures.

Description

Time synchronization monitoring method and device

The present invention relates to communication technologies, and in particular, to a time synchronization monitoring method and apparatus. Background technique

As communication networks become more demanding for time synchronization, satellite synchronization technology is gradually being replaced by the Precision Clock Protocol 1588v2 time synchronization technology. The precision clock protocol 1588v2 is a synchronization technology standard based on packet transmission. It uses timestamp mechanism and master-slave clock scheme to encode and transmit time. At the same time, it uses the symmetry and delay measurement technology of network link to realize master-slave. Synchronization of clock frequency and time. Precision Clock Protocol 1588v2 is a general specification for improving the timing synchronization capability of network systems. It enables distributed communication networks to have strict time synchronization and can be applied in communications, industrial automation and other fields.

In order to ensure time synchronization of the communication network, it is necessary to monitor the time synchronization of the precision clock protocol 1588v2. The prior art method for monitoring the time synchronization of the precision clock protocol 1588v2 is: when the start and acceptance, and the wireless service problems (such as dropped calls, business abnormalities, etc.), the staff uses a time deviation measurement tool (such as a time analyzer) to measure each The time offset of the base stations, whether the time synchronization of the base station is problematic by the time deviation.

In the process of implementing the above-mentioned time synchronization monitoring, the inventors found that at least the following problems exist in the prior art: During the start and acceptance, it is necessary to monitor the time synchronization of each base station, and the staff uses the time deviation measurement tool to measure each base station. The time deviation, the large amount of manpower and material resources, the high cost, and the long measurement period, it is difficult to ensure that the project is delivered on time. In the network maintenance process, the time synchronization is considered only when there is a problem in the wireless service. It is necessary for the staff to measure the time deviation of each base station, and then find the problem base station and debug it. The cost is high, the problem of the base station is difficult to locate, the positioning period is long, and the key performance indicators of the wireless service during the measurement ( Key Performance Indicators, ΚΡΙ ) may have been severely degraded, and wireless services may have serious problems.

Summary of the invention

Embodiments of the present invention provide a time synchronization monitoring method and apparatus capable of real-time monitoring of the precision clock protocol 1588 ν 2 time synchronization to ensure the stability of wireless services.

In one aspect, a time synchronization monitoring method is provided, including: receiving a precision clock protocol 1588v2 time signal, wherein the precision clock protocol 1588v2 time signal is a time signal synchronized according to a precision clock protocol; and acquiring the precision clock protocol 1588v2 time signal precision clock protocol 1588v2 time stamp; the precision clock protocol 1588v2 time stamp is frequency-locked to obtain the precision clock protocol 1588v2 time signal precision clock protocol 1588v2 second pulse PPS; for the precise clock protocol The 1588v2 second pulse PPS and the satellite signal PPS of the satellite signal are phase-detected, and the fractional part of the time delay of the precision clock protocol 1588v2 of the base station is obtained; and the fractional part of the time deviation of the precision clock protocol 1588v2 is reported.

In another aspect, a time synchronized monitoring device is provided, comprising:

a timestamp obtaining module, configured to receive a precision clock protocol 1588v2 time signal, wherein the precision clock protocol 1588v2 time signal is a time signal synchronized according to a precision clock protocol; and obtaining a precision clock protocol of the precision clock protocol 1588v2 time signal

1588v2 time stamp;

a precision clock protocol 1588v2PPS acquisition module, configured to perform frequency lock phase locking on the precision clock protocol 1588v2 time stamp obtained by the time stamp acquisition module, to obtain a precision clock protocol of the precision clock protocol 1588v2 time signal, 1588v2 second pulse PPS;

a nanosecond deviation acquisition module, configured to perform phase identification on the precision clock protocol 1588v2 second pulse PPS obtained by the precision clock protocol 1588v2PPS acquisition module and the satellite PPS of the satellite signal, to obtain a fractional part of the time delay of the precision clock protocol 1588v2 of the base station And a nanosecond deviation reporting module, configured to report a fractional part of a precision clock protocol 1588v2 time deviation obtained by the nanosecond deviation acquisition module.

The time synchronization monitoring method and device provided by the embodiment of the present invention can acquire and report the time delay of the precision clock protocol 1588v2 of the base station to the monitoring system in real time, and can acquire the time clock of the precision clock protocol 1588v2 in real time, and the time of the precision clock protocol 1588v2 The signal is processed to obtain a precision clock protocol 1588v2 second pulse PPS. The precision clock protocol 1588v2 second pulse PPS and satellite PPS are phase-detected, and the precision clock protocol 1588v2 time deviation can be obtained, thereby realizing the real-time monitoring precision clock protocol 1588v2 time synchronization. The embodiments of the present invention solve the problems in the prior art that the time difference of each base station is measured by the staff using the time deviation measuring tool, the measurement period is long, the cost is high, and the problem of the base station of the problem is difficult.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description Merely some embodiments of the invention, for the field For the ordinary technicians, other drawings can be obtained based on these drawings without any creative work.

1 is a flowchart of a method for monitoring time synchronization according to an embodiment of the present invention; FIG. 2 is a flowchart of a method for monitoring time synchronization according to another embodiment of the present invention; FIG. 3 is a time according to another embodiment of the present invention. FIG. 4 is a schematic structural diagram 1 of a time synchronization monitoring apparatus according to still another embodiment of the present invention; FIG.

FIG. 5 is a schematic structural diagram of a time synchronization monitoring apparatus according to still another embodiment of the present invention; FIG.

FIG. 6 is a schematic structural diagram of a time synchronization monitoring apparatus according to still another embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to solve the problem that the time synchronization cannot be monitored in real time in the prior art, the embodiment of the present invention provides a method and apparatus for monitoring time synchronization.

As shown in FIG. 1 , the time synchronization monitoring method provided by the embodiment of the present invention includes: Step 101: Receive a precision clock protocol 1588v2 time signal, where the precision clock protocol 1588v2 time signal is synchronized according to a precision clock protocol. Signal; and obtain the precision clock protocol 1588v2 time stamp of the precision clock protocol 1588v2 time signal.

In this embodiment, step 101 can directly receive the precision clock protocol 1588v2 time signal using the precision clock protocol 1588v2 port. Step 101: The precision clock protocol 1588v2 time signal is time stamped, the best master clock (BMC) algorithm is used to select the source and the state of the decision port, and the precision clock protocol 1588v2 time stamp is obtained.

Step 102: Perform frequency-locked phase locking on the precision clock protocol 1588v2 time stamp to obtain a precision clock protocol 1588v2 time signal precision clock protocol 1588v2 second pulse PPS.

In this embodiment, step 102 performs filtering on the precision clock protocol 1588v2 time signal according to the precision clock protocol 1588v2 time stamp, and the lock frequency lock is equalized to obtain a direct number. Frequency Synthesizer (DDS) frequency control word and precision clock protocol 1588v2 time deviation, the frequency control word can control the clock frequency of the DDS output synchronized with the precision clock protocol 1588v2 time signal and then process the frequency control word through DDS , Get the clock frequency, Real Time Clock (RTC) According to the clock frequency and the precision clock protocol 1588v2 time deviation, you can get the precision clock protocol 1588v2 second pulse PPS synchronized with the precision clock protocol 1588v2 time signal.

Step 103: Perform phase discrimination on the precision clock protocol 1588v2 second pulse PPS and the satellite signal PPS, and obtain the fractional part of the base clock precision time protocol 1588v2 time deviation.

In this embodiment, step 103 may obtain a satellite PPS by acquiring a satellite signal and filtering the satellite signal. Step 103 performs phase discrimination on the satellite PPS and the precision clock protocol 1588v2 second pulse PPS, and obtains the phase deviation of the two PPS, which is the fractional part of the time offset of the precision clock protocol 1588v2.

Step 104: Report the fractional part of the time offset of the precision clock protocol 1588v2. In this embodiment, the method for reporting the time offset of the precision clock protocol 1588v2 in step 104 may be various, for example: using the host to encapsulate the time delay of the precision clock protocol 1588v2, the monitoring system uses the network management software to call the QX interface, so that the monitoring system obtains The precision clock protocol 1588v2 time deviation is thus displayed on the network management terminal of the monitoring system. In addition to the above methods, there are other methods for displaying the time delay of the precision clock protocol 1588v2, which is no longer - praise.

In this embodiment, step 104 may report the time offset of the precision clock protocol 1588v2 to a monitoring system such as a maintenance terminal or a network management terminal. When the absolute value of the 1588v2 time deviation of the base station displayed on the monitoring system is greater than 1.5 microseconds, the base station is the problem base station, and the staff compensates the problem base station to ensure the stability of the wireless service.

The time synchronization monitoring method provided in this embodiment can be used in the fields of communication and industrial automation, and thus controls the time and frequency of the slave clock of the base station in the field to be synchronized with the time frequency of the master clock. Precision Clock Protocol The 1588v2 time synchronization technology detects and corrects the 1588v2 time signal of the base station through the master clock to synchronize the master-slave clock frequency and time. The master clock can be the satellite clock of the original base station or other precise clock. This time synchronization technique is more stable and accurate than the time synchronization technology of satellite timing.

The time synchronization monitoring method provided by the embodiment of the present invention can acquire and report the time delay of the precision clock protocol 1588v2 of the base station to the monitoring system in real time, and can acquire in real time. The precision clock protocol 1588v2 time signal, and the precision clock protocol 1588v2 time signal is processed to obtain the precision clock protocol 1588v2 second pulse PPS. The precision clock protocol 1588v2 second pulse PPS and satellite PPS are phase-detected, and the precision clock protocol 1588v2 time can be obtained. The fractional part of the deviation, in turn, enables real-time monitoring of the precision clock protocol 1588v2 time synchronization. The embodiment of the invention solves the problems in the prior art that the time deviation of each base station is measured by the staff using the time deviation measurement tool, the measurement period is long, the cost is high, and the problem of the problem location of the base station is large.

As shown in FIG. 2, a method for monitoring time synchronization provided by another embodiment of the present invention includes:

Step 201 and step 202, obtaining a precision clock protocol 1588v2 second pulse PPS. The specific acquisition process is the same as step 101 and step 102 in Fig. 1, and will not be described again here.

Step 203: Acquire a satellite signal.

In this embodiment, step 203 can receive satellite signals using a device such as a receiver, a feeder, an amplifier, and a lightning arrester.

Step 204: Perform analog-to-digital conversion on the satellite signal to obtain an initial satellite PPS.

In this embodiment, step 204 may perform analog-to-digital conversion on the satellite signal using a star card, and convert the satellite signal from an analog signal to a digital signal to obtain an initial PPS containing noise.

Step 205: Filter the jitter of the initial satellite PPS to obtain the satellite PPS of the satellite signal. In this embodiment, the process of processing the initial PPS in step 205 may include: performing phase discrimination on the initial PPS according to the satellite signal to obtain a PPS phase difference; and performing the filtering and the frequency-locking equalization algorithm on the PPS phase difference to obtain satellite frequency control. Word and satellite time offset; The satellite frequency control word can control the clock frequency of the DDS output synchronized with the satellite signal, and according to the clock frequency and the satellite time deviation, obtain a satellite PPS that filters the jitter and synchronizes with the satellite signal for a long time.

Step 206 and step 207, obtaining and reporting the fractional part of the time offset of the precision clock protocol 1588v2. For the specific reporting process, refer to step 103 and step 104 in FIG.

In this embodiment, the satellite signal may be a GPS satellite signal, a Beidou satellite signal, or other satellite signals that can be timed, and is not described here.

The time synchronization monitoring method provided in this embodiment can be used in the fields of communication and industrial automation, and further controls the synchronization of the slave clock of the base station in the field with the time frequency of the master clock. The precision clock protocol 1588v2 time synchronization technology detects and corrects the 1588v2 time signal of the base station through the master clock, and realizes the synchronization of the master-slave clock frequency and time. The master clock can be The satellite clock of the original base station can also be other precise clocks. This time synchronization technique is more stable and accurate than the time synchronization technique of satellite timing.

The time synchronization monitoring method provided by the embodiment of the present invention can acquire and report the time delay of the precision clock protocol 1588v2 of the base station to the monitoring system in real time, and can acquire the time clock of the precision clock protocol 1588v2 in real time, and perform the time signal of the precision clock protocol 1588v2. Processing, the precision clock protocol 1588v2 second pulse PPS is obtained, and the precision clock protocol 1588v2 second pulse PPS and satellite PPS are phase-detected, and the fractional part of the precision clock protocol 1588v2 time deviation can be obtained, thereby realizing the real-time monitoring precision clock protocol 1588v2 time synchronization. . The embodiments of the present invention solve the problems in the prior art that the time difference of each base station is measured by the staff using the time deviation measuring tool, the measurement period is long, the cost is high, and the problem of the base station of the problem is difficult.

As shown in FIG. 3, a method for monitoring time synchronization provided by another embodiment of the present invention includes:

Step 301 to step 304, obtaining and reporting the fractional part of the time offset of the precision clock protocol 1588v2. For the specific reporting process, refer to step 101 to step 104 in Figure 1, and details are not described herein again.

Step 305, obtaining a precision clock protocol of the precision clock protocol 1588v2 time signal 1588v2 precise time protocol PTP time.

In this embodiment, the specific process of obtaining the precise time protocol PTP time of the precision clock protocol 1588v2 in step 305 may include:

First, the precision clock protocol 1588v2 for obtaining the time signal of the precision clock protocol 1588v2 is in this embodiment, and the time signal of the precision clock protocol 1588v2 is time-stamped, the best master clock (BMC) algorithm is selected, and the state of the decision port is determined. Etc., get the precision clock protocol 1588v2 time stamp.

Secondly, the precision clock protocol 1588v2 time stamp is frequency-locked to obtain the precision clock protocol 1588v2 precise time protocol PTP time.

In this embodiment, the precision clock protocol 1588v2 time stamp is filtered and the lock frequency lock is equalized to obtain a direct digital synthesis (DDS) frequency control word and a precision clock protocol 1588v2 time deviation, the frequency The control word can control the clock frequency of the DDS output synchronized with the precision clock protocol 1588v2 time signal. The system real time clock (RTC) is based on the clock frequency and the precision clock protocol. The 1588v2 time offset can be obtained, and the precision clock protocol 1588v2 precise time protocol PTP time can be obtained.

Step 306: Obtain a satellite PTP time of the satellite signal.

In this embodiment, the specific process of obtaining the satellite PTP time in step 306 may include: 1. Performing analog-to-digital conversion on the satellite signal to obtain a time of day T0D.

In this embodiment, the satellite signal can be analog-to-digital converted using a star card, and the satellite signal is converted from an analog signal to a digital signal to obtain an initial PPS containing noise.

Second, the time conversion of the time of day T0D, the satellite PTP time.

In this embodiment, the GPS time elapsed time in the T0D can be converted into a satellite PTP time.

Step 307, Precision Clock Protocol 1588v2 Precision Time Protocol PTP Time and Satellite

The PTP time is compared and calculated, and the integer part of the 1588v2 time deviation of the precision clock protocol of the base station is obtained.

In this embodiment, step 307 may compare and calculate the satellite PTP time obtained in step 306 and the precision clock protocol 1588v2 precise time protocol PTP time obtained in step 305 to obtain a second value deviation.

Step 308, reporting an integer part of the time offset of the precision clock protocol 1588v2. In this embodiment, step 308 reports the integer portion of the time offset of the precision clock protocol 1588v2, which is similar to the process of reporting the fractional portion of the time offset of the precision clock protocol 1588v2 in step 104 of FIG. 1, and is not repeated here.

The time synchronization detection method provided in this embodiment can not only monitor the fractional part of the time delay of the precision clock protocol 1588v2 of the base station, but also measure the time deviation of the precision clock protocol 1588v2 of the base station when the time deviation of the precision clock protocol 1588v2 of the base station is large. The integer part of the base, thus avoiding monitoring errors of the base station.

The time synchronization monitoring method provided in this embodiment can be used in the fields of communication and industrial automation, and further controls the synchronization of the slave clock of the base station in the field with the time frequency of the master clock. The precision clock protocol 1588v2 time synchronization technology detects and corrects the 1588v2 time signal of the base station through the master clock to synchronize the master-slave clock frequency and time. The master clock can be the satellite clock of the original base station or other precise clock. This time synchronization technique is more stable and accurate than the time synchronization technique of satellite timing. The time synchronization monitoring method provided by the embodiment of the present invention can acquire and report the time delay of the precision clock protocol 1588v2 of the base station to the monitoring system in real time, and can acquire the time clock of the precision clock protocol 1588v2 in real time, and perform the time signal of the precision clock protocol 1588v2. Processing, obtaining a precision clock protocol 1588v2 second pulse PPS, phase-checking the precision clock protocol 1588v2 second pulse PPS and satellite PPS, and simultaneously calculating and calculating the precision clock protocol 1588v2 PTP time and satellite PTP time, can obtain the "secret clock protocol 1588v2 time" The deviation, and the real-time monitoring of the precision clock protocol 1588v2 time synchronization is realized. The embodiment of the invention solves the problem that the staff needs the time deviation measurement tool to measure the time deviation of each base station, and the measurement period is long and the cost is high. The problem of the location of the problem base station is difficult.

As shown in FIG. 4, a time synchronization monitoring apparatus according to still another embodiment of the present invention includes:

The time stamp obtaining module 401 is configured to receive a precision clock protocol 1588v2 time signal, wherein the precision clock protocol 1588v2 time signal is a time signal synchronized according to a precision clock protocol; and a precision clock protocol 1588v2 for obtaining a precision clock protocol 1588v2 time signal Time stamp.

In this embodiment, the time stamp acquisition module 401 can directly receive the precision clock protocol 1588v2 time signal using the precision clock protocol 1588v2 port. The time stamp acquisition module 401 pairs the precision clock protocol 1588v2 time signal by time stamping, the best master clock (BMC) algorithm source selection and decision port status, etc., to obtain a precision clock protocol 1588v2 time stamp.

The precision clock protocol 1588v2 PPS acquisition module 402 is used to lock the frequency of the 1588v2 time stamp obtained by the time stamp acquisition module, and obtain the precision clock protocol of the precision clock protocol 1588v2 time signal 1588v2 second pulse PPS.

In this embodiment, the precision clock protocol 1588v2 PPS acquisition module 402 filters the precision clock protocol 1588v2 time stamp and locks the lock lock equalization process to obtain a direct digital synthesis (DDS) frequency control word and a precision clock. Protocol 1588v2 time deviation, the frequency control word can control the clock frequency of the DDS output synchronized with the precision clock protocol 1588v2 time signal, and the system real time clock (RTC) can be obtained according to the clock frequency and the precision clock protocol 1588v2 time deviation. Precision clock protocol 1588v2 sec pulse PPS synchronized with the precision clock protocol 1588v2 time signal. The nanosecond deviation obtaining module 403 is configured to perform phase discrimination on the precision clock protocol 1588v2 second pulse PPS obtained by the precision clock protocol 1588v2 PPS acquisition module and the satellite PPS of the satellite signal, to obtain a fractional part of the base clock precision time protocol 1588v2 time deviation.

In this embodiment, the nanosecond deviation acquisition module 403 can obtain the satellite PPS by acquiring satellite signals and filtering the satellite signals. Nanosecond deviation acquisition module

403 pairs the satellite PPS and the precision clock protocol 1588v2 second pulse PPS to phase-detect, and obtain the phase deviation of the two PPS, which is the fractional part of the 1588v2 time deviation of the precision clock protocol.

The nanosecond deviation reporting module 404 is configured to report the fractional part of the precision clock protocol acquired by the nanosecond deviation acquisition module 1588 V 2 time deviation.

In this embodiment, the method for reporting the time offset of the precision clock protocol 1588v2 in the nanosecond deviation reporting module 404 can be various, for example: using the host to encapsulate the time delay of the precision clock protocol 1588v2, and the monitoring system uses the network management software to call the QX interface. The monitoring system obtains the time offset of the precision clock protocol 1588v2, thereby being displayed on the network management terminal of the monitoring system. In addition to the above methods, there are other methods that can be used to display the time delay of the 1588v2 precision clock protocol.

In this embodiment, the nanosecond deviation reporting module 404 can report the time offset of the precision clock protocol 1588v2 to a monitoring system such as a maintenance terminal or a network management terminal. When the absolute value of the 1588v2 time offset of the base station displayed on the monitoring system is greater than 1.5 microseconds, the base station is the problem base station, and the staff compensates the problem base station to ensure the stability of the wireless service.

Further, as shown in FIG. 5, the time synchronization monitoring apparatus in this embodiment may further include:

The satellite signal acquisition module 405 is configured to acquire satellite signals.

In this embodiment, the satellite signal acquisition module 405 can receive satellite signals using devices such as receivers, feeders, amplifiers, and lightning arresters.

The initial satellite PPS acquisition module 406 is configured to perform analog-to-digital conversion on the satellite signals acquired by the satellite signal acquisition module to obtain an initial satellite PPS.

In this embodiment, the initial satellite PPS acquisition module 406 can perform analog-to-digital conversion on the satellite signal using a star card, and convert the satellite signal from an analog signal to a digital signal to obtain an initial PPS containing noise.

A satellite PPS acquisition module 407 for initializing the initial satellite PPS acquisition module The satellite PPS filters out the jitter and obtains the satellite PPS of the satellite signal.

In this embodiment, the process of processing the initial PPS in the satellite PPS obtaining module 407 may include: performing phase discrimination on the initial PPS according to the satellite signal to obtain a PPS phase difference; and performing the filtering and frequency locking equalization algorithm on the PPS phase difference to obtain Satellite frequency control word and satellite time offset; The satellite frequency control word can control the clock frequency of the DDS output synchronized with the satellite signal, and according to the clock frequency and the satellite time deviation, obtain a satellite PPS that filters the jitter and synchronizes with the satellite signal for a long time.

Further, as shown in FIG. 6, the time synchronization monitoring apparatus in this embodiment may further include:

Precision Clock Protocol 1588v2PTP Acquisition Module 408 for obtaining precision clock protocols

Precision Clock Protocol for 1588v2 Time Signal 1588v2 Precision Time Protocol PTP time, where the precision clock protocol 1588v2 time signal is the time signal after synchronization processing according to the precision clock protocol.

In this embodiment, the precision clock protocol 1588v2 PTP acquisition module 408 may further include: a time stamp acquisition submodule and a precision clock protocol 1588v2 acquisition submodule. Wherein: a time stamp acquisition submodule, a precision clock protocol 1588v2 time stamp for obtaining a time clock protocol 1588v2 time signal; a precision clock protocol 1588v2 acquisition submodule, configured to perform a precision clock protocol 1588v2 time stamp obtained by the time stamp acquisition submodule The frequency-locked phase lock is obtained by the precision clock protocol 1588v2 precise time protocol PTP time.

In this embodiment, the time stamp acquisition sub-module can perform time stamping, best time master clock (BMC) algorithm selection, and decision port status for the precision clock protocol 1588v2 time signal, and obtain the precision clock protocol 1588v2. stamp. The precision clock protocol 1588v2 acquisition sub-module filters the precision clock protocol 1588v2 time stamp and locks the frequency lock equalization to obtain a direct digital synthesis (DDS) frequency control word and a precision clock protocol 1588v2 time deviation. The frequency control word can control the clock frequency of the DDS output synchronized with the precision clock protocol 1588v2 time signal. The Real Time Clock (RTC) can obtain the precision clock protocol 1588v2 precise time protocol according to the clock frequency and the time delay of the precision clock protocol 1588v2. PTP time.

The satellite PTP acquisition module 409 is used to acquire the satellite PTP time of the satellite signal.

In this embodiment, the satellite PTP acquisition module 409 may further include: a T0D acquisition submodule and a satellite acquisition submodule. Where: T0D acquisition submodule, used to model satellite signals The number conversion, the time of day TOD is obtained; the satellite acquisition sub-module is used for time conversion of the time of day T0D acquired by the T0D acquisition sub-module, and the satellite PTP time is obtained.

In this embodiment, the T0D acquisition sub-module can perform analog-to-digital conversion on the satellite signal using a star card, and convert the satellite signal from an analog signal to a digital signal to obtain an initial PPS containing noise. The satellite acquisition sub-module converts the GPS time elapsed time in the TOD and can be converted into satellite PTP time.

The second deviation obtaining module 410 is configured to compare and calculate a precision clock protocol 1588v2 precise time protocol PTP time acquired by the precision clock protocol 1588v2 PTP acquisition module and a satellite PTP time acquired by the satellite PTP acquisition module, to obtain a time clock deviation of the base station's precise clock protocol 1588v2 The integer part.

The second deviation reporting module 411 is configured to report the integer part of the precision clock protocol 1588v2 time deviation obtained by the second deviation acquisition module.

In this embodiment, the second deviation reporting module 411 reports the integer part of the time deviation of the precision clock protocol 1588v2, and can refer to the process of reporting the fractional part of the time deviation of the precision clock protocol 1588v2 by the nanosecond deviation reporting module 404, which is not repeated here. .

The time synchronization monitoring apparatus provided in this embodiment can be used in the fields of communication and industrial automation, and further controls the time and frequency of the slave clock of the base station in the field to be synchronized with the time frequency of the master clock. Precision Clock Protocol The 1588v2 time synchronization technology detects and corrects the 1588v2 time signal of the base station through the master clock to synchronize the master-slave clock frequency and time. The master clock can be the satellite clock of the original base station or other precise clock. This time synchronization technique is more stable and accurate than the time synchronization technology of satellite timing.

The time synchronization monitoring apparatus provided by the embodiment of the present invention can acquire and report the time delay of the precision clock protocol 1588v2 of the base station to the monitoring system in real time, and can acquire the time clock of the precision clock protocol 1588v2 in real time, and perform the time signal of the precision clock protocol 1588v2. Processing, the precision clock protocol 1588v2 second pulse PPS is obtained, and the precision clock protocol 1588v2 second pulse PPS and satellite PPS are phase-detected, and the precision clock protocol 1588v2 time deviation can be obtained, thereby realizing the real-time monitoring precision clock protocol 1588v2 time synchronization. The embodiment of the invention solves the problems in the prior art that the time deviation of each base station is measured by the staff using the time deviation measurement tool, the measurement period is long, the cost is high, and the problem of the problem location of the base station is large. The method and device for monitoring the time synchronization performance of the precision clock protocol 1588v2 provided by the embodiment of the invention can be applied in the process of industrial automation, measurement and communication, and solves the problem that multiple stations need to be measured in the start and acceptance process, and the precision is improved. The maintainability of the clock protocol 1588v2 time synchronization performance reduces the implementation cost and maintenance cost of the project.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be implemented directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module can be placed in random access memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or technical field. Any other form of storage medium known.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request

A time synchronization monitoring method, characterized in that it comprises:

Receiving a precision clock protocol 1588v2 time signal, the precision clock protocol 1588v2 time signal is a time signal synchronized according to a precision clock protocol; and obtaining a precision clock protocol 1588v2 time stamp of the precision clock protocol 1588v2 time signal;

Performing frequency-locked phase locking on the precision clock protocol 1588v2 time stamp to obtain a precision clock protocol of the precision clock protocol 1588v2 time signal 1588v2 second pulse PPS;

The precision clock protocol 1588v2 second pulse PPS and the satellite signal PPS are phase-detected to obtain a fractional part of the precision clock protocol 1588v2 time deviation of the base station; and the fractional part of the precision clock protocol 1588v2 time deviation is reported.

2. The method of monitoring time synchronization according to claim 1, further comprising:

Obtaining the satellite signal;

Performing analog-to-digital conversion on the satellite signal to obtain an initial satellite PPS;

The jitter is filtered out of the initial satellite PPS to obtain a satellite PPS of the satellite signal.

3. The method of monitoring time synchronization according to claim 1, further comprising:

Obtaining the precision clock protocol of the precision clock protocol 1588v2 time signal 1588v2 precise time protocol PTP time;

Obtaining a satellite PTP time of the satellite signal;

Comparing the precision clock protocol 1588v2 precise time protocol PTP time with the satellite PTP time to obtain an integer part of the precision clock protocol 1588v2 time offset of the base station;

The integer part of the 1588v2 time offset of the precision clock protocol is reported.

The time synchronization monitoring method according to claim 3, wherein the precise clock protocol 1588v2 precise time protocol P TP time for acquiring the precision clock protocol 1588v2 time signal comprises:

The precision clock protocol for obtaining the precision clock protocol 1588v2 time signal 1588v2 performs frequency-locked phase locking on the precision clock protocol 1588v2 time stamp to obtain the precision clock protocol 1588v2 precise time protocol PTP time.

The time synchronization monitoring method according to claim 3, wherein the acquiring the satellite PTP time of the satellite signal comprises: Performing analog-to-digital conversion on the satellite signal to obtain a time of day T0D;

Time conversion is performed on the daily time T0D to obtain the satellite PTP time.

6. A time synchronization monitoring device, comprising:

a timestamp obtaining module, configured to receive a precision clock protocol 1588v2 time signal, wherein the precision clock protocol 1588v2 time signal is a time signal that is synchronously processed according to a precision clock protocol; and obtains a precision clock protocol of the precision clock protocol 1588v2 time signal 1588v2 time stamp;

a precision clock protocol 1588v2 PPS acquisition module, configured to perform frequency lock phase locking on the precision clock protocol 1588v2 time stamp obtained by the time stamp acquisition module, to obtain a precision clock protocol of the precision clock protocol 1588v2 time signal, 1588v2 second pulse PPS;

a nanosecond deviation acquisition module, configured to perform phase identification on the precision clock protocol 1588v2 second pulse PPS obtained by the precision clock protocol 1588v2 PPS acquisition module and the satellite PPS of the satellite signal, to obtain a fractional time deviation of the precision clock protocol 1588v2 of the base station And a nanosecond deviation reporting module, configured to report a fractional part of a precision clock protocol 1588v2 time deviation obtained by the nanosecond deviation acquisition module.

7. The time synchronization monitoring apparatus according to claim 6, further comprising:

a satellite signal acquisition module, configured to acquire the satellite signal;

An initial satellite PPS acquisition module, configured to perform analog-to-digital conversion on the satellite signal acquired by the satellite signal acquisition module to obtain an initial satellite PPS;

A satellite PPS acquisition module is configured to filter jitter of the initial satellite PPS acquired by the initial satellite PPS acquisition module to obtain a satellite PPS of the satellite signal.

8. The time synchronization monitoring apparatus according to claim 6, further comprising:

Precision Clock Protocol 1588v2 PTP acquisition module for obtaining the precision clock protocol

1588v2 time signal precision clock protocol 1588v2 precise time protocol PTP time; satellite PTP acquisition module, satellite PTP time for acquiring the satellite signal; second deviation acquisition module, used for obtaining the precision clock protocol 1588v2 PTP acquisition module The precision clock protocol 1588v2 precise time protocol PTP time is compared with the satellite PTP time acquired by the satellite PTP acquisition module, and the integer part of the precision clock protocol 1588v2 time deviation of the base station is obtained;

The second deviation reporting module is configured to report an integer part of the precision clock protocol 1588v2 time deviation acquired by the second deviation obtaining module.

The time synchronization monitoring device according to claim 8, wherein the precision clock protocol 1588v2 PTP acquisition module comprises:

a time stamp acquisition submodule, configured to acquire a precision clock protocol 1588v2 time stamp of the precision clock protocol 1588v2 time signal;

The precision clock protocol 1588v2 acquires a submodule for performing frequency lock phase locking on the precision clock protocol 1588v2 time stamp obtained by the time stamp acquisition submodule, and obtains the precision clock protocol 1588v2 precise time protocol PTP time.

The time synchronization monitoring device according to claim 8, wherein the satellite PTP acquisition module comprises:

a T0D acquisition submodule, configured to perform analog-to-digital conversion on the satellite signal to obtain a time of day

T0D;

The satellite acquisition sub-module is configured to perform time conversion on the time of day T0D acquired by the T0D acquisition sub-module to obtain the satellite PTP time.