WO2014161213A1

WO2014161213A1 - Clock synchronization method and apparatus in seamless redundant network

Info

Publication number: WO2014161213A1
Application number: PCT/CN2013/075089
Authority: WO
Inventors: 肖智中; 薛百华; 马化一
Original assignee: 北京东土科技股份有限公司
Priority date: 2013-04-03
Filing date: 2013-05-02
Publication date: 2014-10-09
Also published as: CN103236894A; CN103236894B

Abstract

Disclosed are a clock synchronization method and apparatus in a seamless redundant network, so as to solve the problem in the prior art that precision of synchronization between a primary node clock and a secondary node clock is low. The method comprises: a secondary clock node in a seamless redundant network receiving a seamless redundant packet through different seamless redundant ports of the secondary clock node separately; determining, according to a packet identifier carried by the received seamless redundant packet, whether each seamless redundant packet comprises PTP packet information; if a determining result is yes, storing the seamless redundant packets comprising the PTP packet information; parsing the stored seamless redundant packets received through different seamless redundant ports, and obtaining PTP adjustment value sets corresponding to the different seamless redundant ports according to the PTP packet information obtained by parsing; and selecting one PTP adjustment value set from the obtained PTP adjustment value sets to adjust a local clock of the secondary clock node.

Description

The invention relates to a clock synchronization method and device in a seamless redundant network. The application is filed on April 3, 2013, and the application number is 201310114333.1. The invention name is "a clock synchronization party and device in a seamless redundant network. The priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference. TECHNICAL FIELD The present invention relates to the field of seamless redundant network technologies, and in particular, to a clock synchronization method and apparatus in a seamless redundant network. BACKGROUND OF THE INVENTION A high availability seamless automatic ring has been added to the IEC62439-3 standard (High Availability Seamless)

Automation Ring, HSR) The protocol content of the network. The HSR network (also known as the seamless redundant network) specified in the content of the protocol consists of multiple dual-connected nodes. Each node has two ring access ports. Port), wherein when the source node sends a packet to the destination node, it first adds an HSR label to the duplicated message, and then simultaneously sends the duplicated message to the two ports of the destination node through the two ports. 4 艮文. The destination node receives a packet from each port at different times, and the two received packets are the same packet, so that the destination node retains the first packet received and discards the packet. The second message received.

The Precision Timing Protocol (PTP) protocol implements clock synchronization by selecting one node as the master clock and the other nodes as the slave clock. The master clock node periodically sends the master clock time to the slave clock node through the 艮艮 text, and after receiving the message from the clock node, the ΡΤΡ adjustment value is calculated based on the master clock time, and the ΡΤΡ adjustment is calculated according to the calculation. The value is adjusted to achieve synchronization with the primary clock node.

In the prior art, in order to implement master-slave clock synchronization in a seamless redundant network, it is usually implemented as follows:

As shown in FIG. 1 , a schematic diagram of a connection between a node and a node in a seamless redundant network, where node A is a master clock, node B is a slave clock, port A1 of node A is connected to port B1 of node B, and Port A2 of node A is connected to port B2 of node B. Node A sends a PTP protocol message AB1 to port B1 of node B through port A1, and a port A2 of node A sends a PTP protocol message AB2 to port B2 of node B. Generally, the length of the cable between port A1 and port B1 and the length of the cable between port A2 and port B2 will cause the node B to receive PTP packets from port B1 and port B2 at different times. AB1 and AB2. In this scenario, the PTP protocol packet received is discarded, and the PTP protocol packet received is synchronized. However, due to the influence of external factors, the PTP protocol received by Node B will be jittered, and the jitter level of different protocols received will be different. If the jitter level of the received PTP protocol is higher than the jitter of the received protocol, then the synchronization is based on the first received protocol packet. The adjustment value determined by the ΡΤΡ protocol message is quite different from the value that should be adjusted, and the clock synchronization accuracy of the node Β based on the node 不 is not high. SUMMARY OF THE INVENTION Embodiments of the present invention provide a clock synchronization method and apparatus in a seamless redundant network, which are used to solve the problem of low synchronization accuracy of a master-slave node in the prior art.

The following technical solutions are used in the embodiments of the present invention:

A clock synchronization method in a seamless redundant network, comprising:

The slave clock nodes in the seamless redundant network receive seamless redundancy through their different seamless redundant ports. The seamless redundancy is determined according to the message identifier carried in the received seamless redundant packets. Whether the remaining message includes the message information; when the determination result is yes, the seamless redundant message including the message information is saved;

The stored seamless redundancy received by the different seamless redundant ports is parsed, and according to the parsed ΡΤΡ message information, a set of ΡΤΡ adjustment values corresponding to different seamless redundant ports is obtained;

A set of adjustment values is selected from the obtained set of adjustment values to adjust the local clock of the slave clock node. A clock synchronization device in a seamless redundant network, comprising:

a receiving unit for receiving seamless redundancy through different seamless redundant ports thereof;

a determining unit, configured to determine, according to the packet identifier carried in the seamless redundant packet received by the receiving unit, whether the seamless redundant packet includes the packet information;

a saving unit, configured to: when the determining result of the determining unit is yes, seamlessly including the information including the ΡΤΡ message

• 艮进行进行 save;

The parsing unit is configured to parse the seamless redundancy received by the storage unit through different seamless redundant ports, and obtain corresponding seamless redundancy according to the parsed message information a set of ΡΤΡ adjustment values for the remaining ports;

And an adjusting unit, configured to select a set of adjustment values from the set of adjustment values obtained by the parsing unit to adjust a local clock of the slave clock node.

The beneficial effects of the embodiments of the present invention are as follows:

Through the foregoing solution, the embodiment of the present invention can save the seamless redundant message including the ΡΤΡ packet information received by the different seamless redundant ports, and perform the seamless redundancy of the saved After parsing, the set of ΡΤΡ adjustment values corresponding to different seamless redundant ports are respectively obtained, and then a ΡΤΡ adjustment value set is selected to adjust the local clock of the slave clock node, instead of the ΡΤΡ packet information received after being directly discarded. Seamlessly redundant packets are adjusted according to the seamlessly received packets containing the first received packet information, thus effectively ensuring the degree of jitter A smaller set of seamless redundancy is used to adjust the local clock of the slave clock node, which improves the accuracy of master-slave clock synchronization adjustment. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic diagram of a connection between a node Α and a node B in a seamless redundant network;

2 is a main flowchart of a clock synchronization method in a seamless redundant network according to Embodiment 1 of the present invention; FIG. 3 is a schematic diagram of connection between a GMC and a slave clock node in an actual application according to Embodiment 2 of the present invention; 4 is a specific flowchart of a method for clock synchronization in a seamless redundant network in practical applications according to Embodiment 2 of the present invention;

5 is a distribution diagram of an adjustment value interval according to Embodiment 2 of the present invention;

6 is a distribution state diagram of two sets of adjustment values provided by Embodiment 2 of the present invention;

FIG. 7 is a schematic structural diagram of a clock synchronization apparatus in a seamless redundant network according to Embodiment 3 of the present invention. FIG. 8 is a schematic structural diagram of a clock synchronization system in a seamless redundant network according to Embodiment 4 of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to solve the problem of low synchronization accuracy of a master-slave node in the prior art, an embodiment of the present invention provides a scheme for clock synchronization in a seamless redundant network. The solution can save the seamless redundant packets containing the PTP packet information received by the different seamless redundant ports, and analyze the saved seamless redundancy 4 to obtain different correspondences respectively. A set of PTP adjustment values of the seamless redundant port, and then a PTP adjustment value set is selected to adjust the local clock of the slave clock node, instead of directly receiving the seamless redundant message including the PTP message information. The adjustment is performed according to the seamlessly received packet containing the PTP message information received first, so that the localization of the slave clock node can be realized according to a set of seamless redundancy that is less jittery. The clock is adjusted to improve the accuracy of the master-slave clock synchronization adjustment.

The main implementation principles, specific implementation manners, and the corresponding beneficial effects that can be achieved by the technical solutions of the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Embodiment 1:

As shown in FIG. 2, it is a main flow diagram of a clock synchronization method in a seamless redundant network according to Embodiment 1 of the present invention, where the method includes the following steps:

Step 21: The slave clock nodes in the seamless redundant network respectively receive seamless redundant packets through different seamless redundant ports;

The master clock node sends the same seamless redundancy to the seamless redundant ports of the slave clock nodes through its different seamless ports at the same time. Due to external factors, it is sent separately for the master clock node. The same seamless redundancy 4, the slave clock nodes will be received from different seamless redundant ports at different times. Step 22: Determine, according to the packet identifier carried in the seamlessly redundant packet, whether the seamless redundant packet includes the packet information.

Step 23: When the determination result is yes, the seamless redundant message including the ΡΤΡ message information is saved; wherein, when the determination result is no, the received seamless redundant message does not include the ΡΤΡ message When the information is received, it is determined whether the slave clock node stores the seamless redundant message that is the same as the data information included in the received seamless redundant message. If the judgment result is yes, the seamlessness received will be received. Redundant packets are discarded.

Step 24: parsing the seamlessly redundant packets received by the different seamless redundant ports, and obtaining the adjusted values corresponding to different seamless redundant ports according to the parsed packet information. Collection

Optionally, in this step, the saved seamless redundancy received by the different seamless redundant ports may be collected at least once, and the seamless redundant packets are collected. The analysis is performed, and further, the parsed message information is obtained, and a set of adjustment values corresponding to different seamless redundant ports is obtained.

Step 25: Select a set of adjustment values from the obtained set of adjustment values to adjust the local clock of the slave clock node.

Optionally, in this step, a set of ΡΤΡ adjustment values may be selected from the obtained ΡΤΡ adjustment value set according to the distribution state information of the ΡΤΡ adjustment values respectively included in each obtained ΡΤΡ adjustment value set;

The method may include: determining, according to a preset adjustment value interval, an adjustment value interval to which the ΡΤΡ adjustment value is included in each set of adjustment values, and then performing, for each ΡΤΡ adjustment value set: from the ΡΤΡ adjustment value set In the adjustment value interval to which the ΡΤΡ adjustment value belongs, the candidate adjustment value interval having the largest ΡΤΡ adjustment value is determined, and finally, from the determined candidate adjustment value interval, a candidate adjustment value interval having the smallest lower limit is selected.

ΡΤΡ Adjust the value set.

Further, after selecting a set of adjustment values, the local clock of the slave clock node may be adjusted according to an average value of the adjusted values included in the selected set of values.

It should be noted that adjusting the local clock of the slave clock node according to the selected set of ΡΤΡ adjustment values may be, but is not limited to, the above-mentioned processing manner. For example, you can adjust the following method: Adjust the local clock of the slave clock node according to any one of the selected ΡΤΡ adjustment value sets. In the embodiment of the present invention, the average value of the ΡΤΡ adjustment value included in the selected ΡΤΡ adjustment value set is adjusted in such a manner as to further improve the clock synchronization accuracy. Due to the sudden jitter of the ΡΤΡ adjustment value contained in the selected ΡΤΡ adjustment value set, for example, the hopping range between the ΡΤΡ adjustment value and the ΡΤΡ adjustment value is relatively large, and if one of the ΡΤΡ adjustment value sets is used, Adjusting the adjustment value may make the synchronization accuracy of the slave clock node lower.

Embodiments of the present invention are capable of seamlessly receiving ΡΤΡ packet information received by different seamless redundant ports

• 艮进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行进行保存保存保存保存保存保存保存保存保存保存Local clock is adjusted, Rather than directly collecting the seamlessly redundant packets containing the PTP packet information and adjusting them according to the received seamless redundant packets containing the PTP packet information, the degree of jitter can be effectively guaranteed. A smaller set of seamless redundant messages is used to adjust the local clock of the slave clock node, which improves the accuracy of master-slave clock synchronization adjustment.

Embodiment 2:

As shown in FIG. 3, it is a schematic diagram of a connection between a GMC (Grandmaster Clock) and a slave clock node in an actual application according to Embodiment 2 of the present invention, wherein a seamless redundant port of the GMC (hereinafter referred to as a port) A1 is connected to port B1 of the slave clock node, and port A2 of the GMC is connected to port B2 of the slave clock node. The basic idea of the scheme is: Save multiple seamless redundant packets containing PTP message information received by port B1 and port B2 from the clock node, and save multiple seamless redundancy 4 The parsing is performed to obtain a PTP adjustment value set corresponding to the port B1 and the port B2 respectively, and according to the obtained distribution state information of the two PTP adjustment value sets, an actual PTP adjustment value is obtained for the local clock of the slave clock node. Adjustment.

As shown in FIG. 4, it is a specific flowchart of a clock synchronization method in a seamless redundant network in an actual application according to Embodiment 2 of the present invention, where the method specifically includes:

Step 41: The slave clock node in the seamless redundant network receives the seamless redundancy message through port B1 and port B2, respectively.

Step 42: Determine, according to the packet identifier that is received by the seamlessly redundant packet, whether the PTP packet information is included. If the determination is yes, go to step 43. If the result is no, go to step 47. ;

According to the message identifier of the seamlessly redundant packet containing the PTP packet information specified in the IEEE 1588 standard, we can determine that if the received packet identifier in the seamless redundant packet is 0x88F7, then The seam redundancy message contains PTP 4 message information.

Step 43: Save the received seamless redundant packet containing the PTP packet information.

In step 44, the stored seamless redundancy received by the port B1 and the port B2 are collected at least once, and the seamless redundant packets are parsed and parsed according to the analysis. The ΡΤΡ message information is obtained, and the ΡΤΡ adjustment value set corresponding to the port B1 and the port Β2 respectively is obtained;

In the embodiment of the present invention, the ΡΤΡ adjustment value obtained by the parsing of the port B1 can be stored in the data area corresponding to the port B1, and the seamless redundancy received by the port Β2 is parsed. The ΡΤΡ adjustment value is stored in the data area corresponding to the port Β2, and the ΡΤΡ adjustment values stored in the two data areas respectively constitute the ΡΤΡ adjustment value set corresponding to the port B1 and the ΡΤΡ adjustment value set corresponding to the port Β2.

Step 45: Select a set of adjustment values from the obtained set of adjusted values according to the distribution state information of the adjusted values respectively included in each obtained set of adjustment values;

Specifically, as shown in FIG. 5, it is an adjustment value interval distribution diagram provided by an embodiment of the present invention. The ΡΤΡ adjustment value in the data area corresponding to the port B1 and the ΡΤΡ adjustment value in the data area corresponding to the port Β2 are respectively corresponding to each adjustment value interval according to the preset adjustment value interval, and respectively determined for Port B1 contains the most adjusted value The candidate adjustment value interval and the candidate adjustment value interval including the most PTP adjustment value for the port B2, then, in the above-mentioned determined candidate adjustment value intervals for the port B1 and the port B2, we consider that there is a minimum lower limit. The PTP adjustment value included in the PTP adjustment value set corresponding to the candidate adjustment value interval is relatively stable, and the jitter range between the PTP adjustment value and the PTP adjustment value is small. The preset adjustment value interval may be set according to the user's needs, and is not specifically limited herein.

As shown in FIG. 6, the distribution state diagram of the set of values of the two PTPs, wherein the abscissa is the number of adjustments, the ordinate is the PTP adjustment value, and each data point is obtained according to a seamlessly redundant message received. A PTP adjustment value, the hollow data point is a set of ΡΤΡ adjustment value D1 obtained according to a set of seamless redundancy received by port B1, and the solid data point is a group received according to port Β2 A set of ΡΤΡ adjustment values D2 obtained by seamlessly redundant messages. It can be seen more clearly from Figure 6 that D1 has a larger jitter range, and D2 has a smaller jitter range than D1, which indicates that D2 is more stable, so D2 is selected to adjust the local clock of the slave clock node.

Step 46: Adjust the local clock of the slave clock node according to an average value of the PTP adjustment values included in the selected PTP adjustment value set.

Step 47: For the seamless redundancy received by the different ports and containing the same data information, the seamless redundancy received first is saved, and the seamless redundancy received later is received. Discard.

Specifically, the step may specifically include: determining whether the seamless redundant message that is the same as the data information included in the received seamless redundant message is stored, and when the determination result is yes, the received no Seated redundant packets are discarded.

• 艮进行进行进行进行进行进行进行进行进行进行进行进行进行进行艮进行进行艮艮艮艮艮进行艮艮艮艮艮保存保存保存保存保存保存保存保存保存保存保存保存保存保存保存保存分布The distribution state information of the adjustment value is selected as a set of adjustment values, and the local clock of the slave clock node is adjusted, instead of directly receiving the seamless redundant message containing the message information and receiving it first. The seamless redundant packets including the ΡΤΡ message information are adjusted, so that the local clock of the slave clock node can be adjusted according to a set of seamless redundant messages with less jitter. The accuracy of the master-slave clock synchronization adjustment.

In addition, the local clock is adjusted according to the average value of the ΡΤΡ adjustment values included in the selected ΡΤΡ adjustment value set, which further prevents the sudden jitter of a set of seamless redundancy in the selected jitter degree. , so that the determined average adjustment value is closer to the actual adjustment value, and the synchronization adjustment precision of the master-slave clock is further improved.

Embodiment 3:

Based on the clock synchronization method in the seamless redundant network, the embodiment of the present invention further provides a clock synchronization device in a seamless redundant network. As shown in FIG. 7, the following functional modules are included:

The receiving unit 71 is configured to receive seamless redundancy respectively through different seamless redundant ports thereof;

The determining unit 72 is configured to determine, according to the packet identifier carried in the seamless redundancy packet received by the receiving unit 71, whether the seamless redundancy packet includes the packet information. The saving unit 73 is configured to save the seamless redundancy information including the PTP message information when the determination result of the determining unit 72 is YES;

The parsing unit 74 is configured to parse the seamless redundant packets respectively received by the different seamless redundant ports saved by the saving unit 73, and obtain corresponding seamless redundancy according to the parsed ΡΤΡ message information. a set of ΡΤΡ adjustment values for the remaining ports;

The adjusting unit 75 is configured to select a set of adjustment values from the set of adjustment values obtained by the parsing unit 74 to adjust the local clock of the slave clock node.

Optionally, the device may further include:

The determining unit 76 is configured to: when the determining result of the determining unit 72 is negative, determine whether the seamless redundant message that is the same as the data information included in the received seamless redundant message is stored;

The discarding unit 77 is configured to discard the received seamless redundant message when the determining result of the determining unit 76 is YES. Optionally, the parsing unit 74 may be specifically configured to:

The seamless redundancy received by the different seamless redundant ports is stored at least once, and the seamlessly redundant 4 files are parsed.

Optionally, the adjusting unit 75 can be specifically configured to:

A set of ΡΤΡ adjustment values is selected from the ΡΤΡ adjustment value set obtained by the parsing unit 74, and the local clock of the slave clock node is adjusted according to the average value of the ΡΤΡ adjustment values included in the selected ΡΤΡ adjustment value set.

Further, the adjusting unit 75 is further specifically configured to:

Based on the distribution state information of the ΡΤΡ adjustment values respectively included in each set of adjustment values obtained by the analysis unit 74, a set of ΡΤΡ adjustment values is selected from the obtained ΡΤΡ adjustment value set.

Specifically, it may include:

a first determining module, configured to determine, according to a preset adjustment value interval, an adjustment value interval to which the ΡΤΡ adjustment value respectively included in each set of adjustment values belongs;

a second determining module, configured to perform, for each set of adjustment values: determining, from the adjustment value interval to which the ΡΤΡ adjustment value included in the ΡΤΡ adjustment value set belongs, a candidate adjustment value interval that includes the most ΡΤΡ adjustment value;

The selection module is configured to select a set of adjustment values corresponding to the candidate adjustment value interval having the smallest lower limit.

Embodiment 4:

Based on the clock synchronization method and apparatus in the seamless redundant network, the embodiment of the present invention further provides a clock synchronization system in a seamless redundant network, as shown in FIG. 8, which specifically includes: a master clock node 81 and a slave a clock node 82; wherein, the master clock node 81 is configured to respectively send seamless redundancy to different seamless redundant ports of the slave clock node 82; the slave clock node 82 is used for different seamless redundancy The remaining ports respectively receive the seamless redundant packets sent by the primary clock node 71; and determine whether the seamless redundant packets contain the ΡΤΡ message information according to the received packet identifiers of the seamless redundant packets; If yes, save the seamless redundant message containing the message information; save and save Parsing seamless redundant packets received by different seamless redundant ports, and obtaining PTP adjustment value sets corresponding to different seamless redundant ports according to the parsed PTP message information; A set of PTP adjustment values is selected from the set of PTP adjustment values to adjust the local clock of the slave clock node 82.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request

1. A clock synchronization method in a seamless redundant network, characterized by including:

The slave clock nodes in the seamless redundant network receive seamless redundant messages through their different seamless redundant ports;

According to the message identifier carried by the received seamless redundant message, determine whether the seamless redundant message includes PTP message information; when the determination result is yes, the seamless redundant message containing the PTP message information is save the document; and

Analyze the saved seamless redundant messages received through different seamless redundant ports, and obtain a set of PTP adjustment values corresponding to different seamless redundant ports based on the parsed PTP message information;

Select a PTP adjustment value set from the obtained PTP adjustment value set to adjust the local clock of the slave clock node.

2. The method according to claim 1, characterized in that, parsing the saved seamless redundant messages received through different seamless redundant ports, specifically includes:

Collect the saved seamless redundant messages received through different seamless redundant ports at least once, and analyze the collected seamless redundant messages.

3. The method according to claim 1, characterized in that, selecting a PTP adjustment value set from the obtained PTP adjustment value set to adjust the local clock of the slave clock node, specifically including:

Select a PTP adjustment value set from the obtained PTP adjustment value set, and adjust the local clock of the slave clock node according to the average value of the PTP adjustment values included in the selected PTP adjustment value set.

4. The method of claim 1, 2 or 3, wherein a PTP adjustment value set is selected from the obtained PTP adjustment value set, specifically including:

According to the distribution status information of the PTP adjustment values contained in each obtained PTP adjustment value set, a PTP adjustment value set is selected from the obtained PTP adjustment value set.

5. The method according to claim 4, characterized in that, selecting a PTP adjustment value set according to the distribution status information, specifically including: According to the preset adjustment value interval, determine the adjustment value interval to which the PTP adjustment value contained in each PTP adjustment value set respectively belongs;

Executed for each PTP adjustment value set: From the adjustment value intervals to which the PTP adjustment values contained in the PTP adjustment value set belong, determine the candidate adjustment value interval containing the most PTP adjustment values; select the candidate adjustment value interval with the smallest lower limit The corresponding set of PTP adjustment values.

6. A clock synchronization device in a seamless redundant network, characterized by including:

The receiving unit is used to receive seamless redundant messages respectively through its different seamless redundant ports; the determining unit is used to determine the seamless redundant message according to the message identifier carried by the seamless redundant message received by the receiving unit. Whether the remaining message includes PTP message information;

A saving unit, configured to save the seamless redundant message containing PTP message information when the determination result of the determining unit is yes;

The parsing unit is used to parse the seamless redundant messages received through different seamless redundant ports saved by the storage unit, and obtain the corresponding seamless redundant ports based on the parsed PTP message information. A set of PTP adjustment values;

The adjustment unit is configured to select a PTP adjustment value set from the PTP adjustment value set obtained by the analysis unit to adjust the local clock of the slave clock node.

7. The device according to claim 6, wherein the parsing unit is specifically configured to: perform at least one analysis on the saved seamless redundant messages received through different seamless redundant ports. Collect, and analyze the collected seamless redundant messages.

8. The device according to claim 6, wherein the adjustment unit is specifically configured to: select a PTP adjustment value set from the PTP adjustment value set obtained by the parsing unit, and select a PTP adjustment value set according to the selected PTP adjustment value set. Contains the average of the PTP adjustment values that adjust the local clock of the slave clock node.

9. The device according to claim 6, 7 or 8, characterized in that the adjustment unit is specifically used for:

According to the distribution status information of PTP adjustment values contained in each PTP adjustment value set obtained by the parsing unit, a PTP adjustment value set is selected from the obtained PTP adjustment value set.

10. The device according to claim 9, wherein the adjustment unit specifically includes: a first determination module, configured to determine the PTP adjustment included in each PTP adjustment value set according to the preset adjustment value interval. The adjustment value range to which the value belongs;

The second determination module is configured to perform for each PTP adjustment value set: from the adjustment value intervals to which the PTP adjustment values contained in the PTP adjustment value set belong, determine the candidate adjustment value interval containing the most PTP adjustment values;

Selection module, used to select the PTP adjustment corresponding to the candidate adjustment value interval with the minimum lower limit