WO2016119362A1

WO2016119362A1 - Clock synchronization method, router and cluster routing system

Info

Publication number: WO2016119362A1
Application number: PCT/CN2015/081174
Authority: WO
Inventors: 罗俊翔
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-01-28
Filing date: 2015-06-10
Publication date: 2016-08-04
Also published as: CN105991204A

Abstract

Disclosed are a clock synchronization method, a router and a cluster routing system. The clock synchronization method is applied to the cluster routing system. The cluster routing system comprises a main center frame router and at least two service frame routers. The clock synchronization method comprises the following steps: according to configuration data input by a user, the main center frame router sets a clock source, the clock source being the main center frame router or the service frame router; the main center frame router acquires pre-set synchronization clock information in the clock source, the synchronization clock information comprising frequency synchronization information and phase synchronization information; and according to the type of the clock source, the main center frame router sends the synchronization clock information to a corresponding router to allow the router to perform clock synchronization.

Description

Clock synchronization method, router and cluster routing system

Technical field

This paper covers the field of communication technology, especially clock synchronization methods, routers and cluster routing systems.

Background technique

Router clustering technology is to bridge two or more ordinary routers through one or more special central connection routers, so that these common routers can cooperate with each other and process in parallel, such as the same router is working, thus achieving bandwidth upgrade and Increased processing power. In a cluster, a common router is called a service box router, and a central connection router is called a center box router.

In digital communication systems, data is transmitted in the form of data streams. When these data streams are transmitted between digital switching devices, their rates must be completely consistent to ensure accurate data transmission. It can be understood that in order to enable the routers in the cluster to work together, it is necessary to perform clock synchronization on each router in the cluster. The clock synchronization includes two aspects of synchronization information, on the one hand, phase synchronization, that is, correcting the time deviation, and on the other hand, frequency synchronization, that is, correcting the frequency. However, the related art does not have a technical solution for clock synchronization of the cluster routing system, which leads to the problem that the cluster routing system is unstable.

Summary of the invention

The embodiment of the invention provides a clock synchronization method, a router and a cluster routing system, which are used to improve the stability of the cluster routing system.

The embodiment of the present invention provides a clock synchronization method, where the clock synchronization method is applied to a cluster routing system, where the cluster routing system includes a main center frame router and at least two service box routers, and the clock synchronization method includes the following steps:

The main center frame router sets a clock source according to the configuration data input by the user, and the clock source is a main center box router or a service box router;

The main center frame router acquires synchronization clock information preset in the clock source, where the synchronization The clock information includes frequency synchronization information and phase synchronization information;

The primary center frame router sends the synchronous clock information to a corresponding router according to the type of the clock source, so that the router performs clock synchronization.

Optionally, after the primary center frame router sends the synchronous clock information to the corresponding router according to the type of the clock source, and the clock is synchronized by the router, the method further includes:

The router that receives the synchronous clock information synchronizes its own clock according to the synchronous clock information.

Optionally, before any of the service box routers is configured as a clock source, before the master center box router acquires the synchronization clock information preset in the clock source, the method further includes:

The service box router configured as a clock source acquires clock information of a preset external clock source, and synchronizes its own clock according to the clock information;

The service box router configured as the clock source generates synchronization clock information according to the clock information and sends the synchronization clock information to the main center box router, so that the main center box router acquires synchronization clock information.

Optionally, when the primary center frame router is configured as a clock source, the acquiring, by the primary center frame router, the synchronized clock information preset in the clock source includes:

The primary center frame router generates synchronous clock information according to its own clock information.

Optionally, the cluster routing system further includes a backup center box router, where the clock synchronization method further includes:

When the primary center frame router fails to obtain the synchronous clock information preset in the clock source, the primary center frame router performs switching between the primary central frame router and the standby primary central frame router.

The embodiment of the invention further provides a main central frame router, including:

The clock source setting module is configured to set a clock source according to the configuration data input by the user, where the clock source is a central center frame router or a service box router;

The synchronous clock information acquiring module is configured to acquire synchronization clock information preset in the clock source, The synchronous clock information includes frequency synchronization information and phase synchronization information;

The first sending module is configured to send the synchronous clock information to a corresponding router according to the type of the clock source, so that the router performs clock synchronization.

Optionally, the primary center frame router further includes a first synchronization module, configured to synchronize the self clock according to the synchronous clock information after receiving the synchronous clock information.

Optionally, when the primary center-box router is configured as a clock source by the clock source setting module, the synchronous clock information acquiring module acquires synchronization clock information preset in the clock source, and includes: the synchronous clock. The information acquisition module generates synchronous clock information according to the clock information of the main center frame router itself.

Optionally, the main central frame router further includes a switching module, configured to perform, when the synchronous clock information acquiring module fails to acquire the synchronous clock information preset in the clock source, Switch.

The embodiment of the invention further provides a service box router, including:

a second synchronization module, configured to: when the service box router is configured as a clock source, acquire clock information of a preset external clock source, and synchronize the clock according to the clock information;

The second sending module is configured to generate synchronous clock information according to the clock information, and send the synchronous clock information to the primary center frame router, so that the primary center frame router obtains synchronous clock information.

Optionally, the second synchronization module is further configured to: when the service box router is not a clock source, after receiving the synchronization clock information sent by the main center frame router, synchronize the self clock according to the synchronization clock information.

The embodiment of the present invention further provides a cluster routing system, including a main center box router and at least two service box routers, where the main center box router includes a main center box router as described above; Business box router as described earlier.

The embodiment of the invention further provides a computer readable storage medium storing program instructions, which can be implemented when the program instructions are executed.

In the embodiment of the present invention, the clock source is configured by the main center frame router according to the configuration data input by the user, where the clock source is a main center box router or a service box router; and the main center box router acquires presets in the clock source. Synchronizing clock information, the synchronization clock information includes frequency synchronization information and phase synchronization information; the primary center frame router sends the synchronization clock information to a corresponding router according to the type of the clock source, for the router to perform Clock synchronization. Therefore, the clocks of all routers in the cluster routing system are synchronized, thereby improving the stability of the cluster routing system.

BRIEF abstract

1 is a schematic diagram of a network connection in a cluster routing system according to Embodiment 1 of the present invention;

2 is a schematic flowchart of a clock synchronization method according to Embodiment 1 of the present invention;

3 is a schematic flowchart of a clock synchronization method according to Embodiment 2 of the present invention;

4 is a schematic flowchart of a clock synchronization method according to Embodiment 3 of the present invention;

5 is a schematic diagram of a redundant backup network connection in a cluster router system according to Embodiment 4 of the present invention;

6 is a schematic structural diagram of a main center frame router in Embodiment 4 of the present invention;

FIG. 7 is a schematic structural diagram of a service box router according to Embodiment 4 of the present invention.

Embodiments of the invention

It should be noted that, in the case of no conflict, the features in the embodiments of the present invention and the embodiments may be arbitrarily combined with each other.

Example 1

An embodiment of the present invention provides a clock synchronization method, where the clock synchronization method is applied to a cluster routing system, where the cluster routing system includes a main center frame router and at least two service box routers. Referring to FIG. 1 and FIG. 2, in this implementation In the example, the clock synchronization method includes:

In step S10, the primary center frame router sets a clock source according to the configuration data input by the user, and the clock source is a central center frame router or a service box router;

The clock synchronization method provided in this embodiment is applied to the clock synchronization of the cluster routing system, and the clock is synchronized between the main central box router and the multiple service box routers in the cluster routing system, and under the coordination of the main central box router. The service box routers can cooperate with each other and process in parallel, such as the same router working, thereby achieving bandwidth upgrade and processing capability. It should be noted that the clock synchronization includes two aspects of synchronization information, on the one hand, phase synchronization, that is, correcting the time deviation, and on the other hand, frequency synchronization, that is, correcting the frequency.

In step S10, the user may input configuration data on the designated interface of the main center box router, so that the main center box router sets the clock source according to the configuration data input by the user; the clock source may be a main center box router or a service box router. For example, the user can set any service box router in the cluster routing system as a clock source, so that the main center box router obtains synchronous clock information from the service box router.

Step S20: The primary center frame router acquires synchronization clock information preset in the clock source, where the synchronization clock information includes frequency synchronization information and phase synchronization information.

Step S30: The primary center frame router sends the synchronous clock information to a corresponding router according to the type of the clock source, so that the router performs clock synchronization.

The clock source type includes a center box router and a service box router.

In the cluster routing system, the main central box router is responsible for coordinating and managing other service box routers, and the service box router is responsible for packet basic services such as packet forwarding. Therefore, in this embodiment, after the main central frame router obtains the synchronous clock information, The main center box router is responsible for synchronizing the distribution of clock information.

Alternatively, the primary center frame router can be set as a clock source, and the service box router can also be set as a clock source.

When the service box router is set as the clock source, the above step S30 is: the main center frame router sends the synchronous clock information to all routers except the service box router set as the clock source.

When the main center frame router is set as the clock source, the above step S30 is: the main center frame The router sends the synchronous clock information to all routers except the main central frame router.

It can be seen that the "corresponding router" in step S30 refers to all routers except the router set as the clock source.

It can be understood that the router that receives the synchronous clock information will synchronize its own clock according to the synchronous clock information.

In the embodiment of the present invention, the primary center frame router sets a clock source according to configuration data input by the user; the primary center frame router acquires synchronization clock information preset in the clock source; and the main center frame router according to the clock The type of the source sends the synchronous clock information to the corresponding router for clock synchronization of the router. Therefore, the clocks of all routers in the cluster routing system are synchronized, thereby improving the stability of the cluster routing system.

Example 2

Referring to FIG. 3, the difference between the embodiment and the first embodiment is that, in the embodiment, after the step S30, the method further includes:

Step S40: The router that receives the synchronous clock information synchronizes its own clock according to the synchronous clock information.

It can be understood that the router that receives the synchronous clock information synchronizes its own clock according to the synchronous clock information. The router that receives the synchronous clock information synchronizes the frequency of the own clock according to the frequency synchronization information in the synchronous clock information, and synchronizes the phase of the own clock according to the phase synchronization information in the synchronous clock information.

Example 3

Since the primary center frame router can be set as the clock source, the service box router can also be set as the clock source. In this example, a clock synchronization method is provided when any of the service box routers is configured as a clock source. Referring to FIG. 4, the difference between the embodiment and the embodiment 1 is that the foregoing step S20 further includes:

Step S50, the service box router configured as a clock source acquires clock information of a preset external clock source, and synchronizes its own clock according to the clock information;

Step S60: The service box router configured as the clock source generates synchronization clock information according to the clock information, and sends the synchronization clock information to the main center frame router, so that the main center frame router acquires synchronization clock information.

In this embodiment, the clock information of the preset external clock source is obtained by the service box router configured as the clock source, and the clock is synchronized according to the clock information; the service box router configured as the clock source generates the clock information according to the clock information. The clock information is synchronized and sent to the main center frame router for the main center frame router to acquire synchronous clock information. Synchronous clock information is generated according to the clock information of the external clock source for the cluster routing system to synchronize the clock, which can make the cluster routing system clock synchronization more accurate.

The user can input configuration data on the specified interface of the service box router to specify an external clock source. The clock information of the external clock source can be obtained in various ways, for example, GPS, GLONASS, Galileo, Synce, 1588V2, and the like.

It should be noted that GPS, GLONASS, and Galileo can simultaneously provide clock information including frequency synchronization information and phase synchronization information. Synce can only provide frequency synchronization information, and 1588V2 can only provide phase synchronization information. Therefore, when using Syne to obtain frequency synchronization information, phase synchronization information needs to be acquired with 1588V2.

Optionally, when the primary center frame router is configured as a clock source, the foregoing step S20 includes:

In this embodiment, when the primary center frame router is set as the clock source, the primary center frame router can generate synchronous clock information according to its own clock information.

It can be understood that the primary center frame router can also obtain clock information of an external clock source and generate synchronous clock information according to the clock information. The clock information of the external clock source can be obtained in various ways, for example, GPS, GLONASS, Galileo, Synce, 1588V2, and the like.

Optionally, in the embodiment, the cluster routing system further includes a backup center box router, and the clock synchronization method further includes:

In this embodiment, the standby central chassis router is configured to replace the faulty primary central frame router with the primary central frame router as the primary central frame router when the primary central frame router fails to obtain the synchronous clock information preset in the clock source. For example, when any of the service box routers is configured as the clock source and the current main center box router fails to obtain the synchronization clock information from the service box router, the backup center box router is switched to the primary center frame router, that is, the backup center box. The router acquires synchronization clock information preset in the service box router, where the synchronization clock information includes frequency synchronization information and phase synchronization information, and sends the synchronization clock information to a corresponding router according to the type of the clock source, to The clock is synchronized by the router.

It can be understood that in order to improve the stability of the clock synchronization of the cluster routing system, redundant backups can be performed on all devices in the cluster routing system. Referring to FIG. 5, the cluster routing system includes a main center box router R1, a standby center box router R2, a service box router R3, and a service box router R4. The main central frame router R1 and the standby central frame router R2 respectively include a main main control board, a standby main control board, and a clock board. The service box router R3 and the service box router R4 respectively include a main main control board, a standby main control board, and a line. card.

The clock synchronization method is described by taking the service box router R3 as the clock source as an example.

The line card of the service box router R3 obtains the clock information sent by the external clock source through the SyncE+1588V2, and synchronizes the clock with the clock, and sends the clock information to the main or standby main control board of the service box router R3; The main main control board generates synchronous clock information according to the clock information, and sends the synchronous clock information to the clock board of the main center frame router R1. The clock board of the main center frame router R1 synchronizes its own clock according to the synchronous clock information, and sends the synchronous clock information to the primary or standby main control board of the main central frame router R1; and is mastered by the main central frame router R1. The board sends the synchronous clock information to the standby center frame router R2. The clock board of the main center frame router R1 sends the synchronous clock information to the service box router R4 for other routers in the cluster routing system. Perform clock synchronization. It should be noted that the backup center frame router R4 may also send the received synchronization clock information to the service box router connected thereto.

The device in the cluster routing system has redundant backups. For example, when the main control board of the R1 is faulty, the standby main control board can replace the work. For example, when the main center frame router R1 is abnormal or the networking cable is loose. The standby center frame router R2 can be ready to be transferred to the master at any time to complete the acquisition and delivery of synchronous clock information.

Example 4

The embodiment of the present invention further provides a cluster routing system. Referring to FIG. 1 , the cluster routing system includes a main central box router and at least two service box routers, where

As shown in FIG. 6, the main central frame router includes a clock source setting module 601, a synchronous clock information acquiring module 602, and a first sending module 603, where:

The clock source setting module 601 is configured to set a clock source according to configuration data input by the user, where the clock source is a central center frame router or a service box router;

The synchronization clock information obtaining module 602 is configured to acquire synchronization clock information preset in the clock source, where the synchronization clock information includes frequency synchronization information and phase synchronization information;

The first sending module 603 is configured to send the synchronous clock information to a corresponding router according to the type of the clock source, so that the router performs clock synchronization.

By synchronizing the clock between the main central box router and the service box router in the cluster routing system, and under the coordination of the main central box router, all service box routers can cooperate with each other and process in parallel, such as the same router working, thereby realizing bandwidth. Upgrade and processing capabilities. It should be noted that the clock synchronization includes two aspects of synchronization information, on the one hand, phase synchronization, that is, correcting the time deviation, and on the other hand, frequency synchronization, that is, correcting the frequency.

The user can input the configuration data on the designated interface of the main center box router, so that the main center box router can set the clock source according to the configuration data input by the user; the clock source can be the main center box router or the service box router. For example, the user can set any service box router in the cluster routing system as a clock source, so that the main center box router obtains synchronous clock information from the service box router.

In the cluster routing system, the main central frame router is responsible for coordinating and managing all the service box routers, and the service box router is responsible for packet basic services such as packet forwarding. It can be understood that, in this embodiment, when the main central frame router obtains the synchronous clock information. After that, the main center box router is responsible for synchronizing the distribution of clock information.

The main center frame router can be set as a clock source, and the service box router can also be set as a clock source.

When the service box router is set as the clock source, the first sending module 603 is configured to deliver the synchronous clock information to all routers except the service box router that is set as the clock source.

When the primary center frame router is set as the clock source, the first sending module 603 is configured to deliver the synchronous clock information to all routers except the main center box router.

When the primary center frame router is set as a clock source, the primary center frame router is set to generate synchronous clock information based on its own clock information.

In this embodiment, when the primary center frame router is set as the clock source, the synchronous clock information acquiring module 602 is configured to generate synchronous clock information according to the clock information of the clock.

In the embodiment of the present invention, the clock source is configured by the main center frame router according to the configuration data input by the user, where the clock source is a main center box router or a service box router; and the main center box router acquires presets in the clock source. Synchronizing clock information, the synchronization clock information includes frequency synchronization information and phase synchronization information; the primary center frame router sends the synchronization clock information to a corresponding router according to the type of the clock source, for the router to perform Clock synchronization. Thereby making The clocks of all routers in the cluster routing system are synchronized, which improves the stability of the cluster routing system.

Optionally, the primary center frame router further includes a first synchronization module 604 configured to synchronize the self clock according to the synchronization clock information after receiving the synchronization clock information.

The main center frame router can be set as the clock source, and the service box router can also be set as the clock source.

When any service box router is set as the clock source, the service box router set as the clock source is set to acquire the preset external clock source before the main center box router acquires the synchronization clock information preset in the clock source. The clock information is synchronized with the clock according to the clock information; and is further configured to generate synchronous clock information according to the clock information and send the synchronous clock information to the main center frame router, so that the primary center frame router acquires synchronous clock information.

The service box router is as shown in FIG. 7, and includes:

The second synchronization module 701 is configured to: when the service box router is configured as a clock source, acquire clock information of a preset external clock source, and synchronize the clock according to the clock information;

The second sending module 702 is configured to generate synchronous clock information according to the clock information, and send the synchronous clock information to the primary center frame router, so that the primary center frame router acquires synchronous clock information.

Optionally, the second synchronization module 701 is further configured to: when the service box router is not a clock source, after receiving the synchronization clock information sent by the main center frame router, according to the synchronization time The clock information synchronizes its own clock.

Optionally, in order to prevent the primary central frame router from working properly, the cluster routing system clock is not synchronized, the cluster routing system further includes a backup central box router, and the primary central frame router is further configured to fail to obtain the primary central frame router. When the synchronous clock information preset in the clock source is described, the switching between the primary center frame router and the standby primary center frame router is performed.

It can be understood that in order to improve the stability of the clock synchronization of the cluster routing system, the cluster can be All devices in the routing system make redundant backups. For example, referring to FIG. 5, the cluster routing system includes a main center box router R1, a standby center box router R2, a service box router R3, and a service box router R4. The main central frame router R1 and the standby central frame router R2 respectively include a main main control board, a standby main control board, and a clock board. The service box router R3 and the service box router R4 respectively include a main main control board, a standby main control board, and a line. card.

The clock synchronization method is described by using the service box router R3 as the clock source.

The line card of the service box router R3 obtains the clock information sent by the external clock source through the SyncE+1588V2, and synchronizes the clock with the clock. The clock information is sent to the main frame of the service box router R3. The service box router R3 The main main control board generates synchronous clock information according to the clock information, and sends the synchronous clock information to the clock board of the main center frame router R1. The clock board of the main center frame router R1 synchronizes its own clock according to the synchronous clock information, and sends the synchronous clock information to the main/standby main control board of the main center frame router R1; and is mastered by the main central frame router R1. The board sends the synchronous clock information to the standby center frame router R2. The clock board of the main center frame router R1 sends the synchronous clock information to the service box router R4 for clock synchronization of all routers in the cluster routing system. It should be noted that the backup center frame router R4 may also send the received synchronization clock information to the service box router connected thereto.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program that instructs the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware or in the form of a software function module. Embodiments of the invention are not limited to any specific form of combination of hardware and software.

Industrial applicability

The method, the device and the system of the embodiment of the invention enable the clocks of all the routers in the cluster routing system to be synchronized, thereby improving the stability of the operation of the cluster routing system.

Claims

A clock synchronization method is characterized in that the clock synchronization method is applied to a cluster routing system, and the cluster routing system includes a main center box router and at least two service box routers, and the clock synchronization method includes the following steps:

The main center frame router sets a clock source according to the configuration data input by the user, and the clock source is a main center box router or a service box router;

The main center frame router acquires synchronization clock information preset in the clock source, where the synchronization clock information includes frequency synchronization information and phase synchronization information;

The primary center frame router sends the synchronous clock information to a corresponding router according to the type of the clock source, so that the router performs clock synchronization.
The clock synchronization method according to claim 1, wherein the main center frame router transmits the synchronous clock information to a corresponding router according to a type of the clock source, after the router performs clock synchronization, the method Also includes:

The router that receives the synchronous clock information synchronizes its own clock according to the synchronous clock information.
The clock synchronization method of claim 1, wherein the method further comprises: before the main center frame router acquires the synchronization clock information preset in the clock source, when the service box is configured as a clock source, the method further includes:

The service box router configured as a clock source acquires clock information of a preset external clock source, and synchronizes its own clock according to the clock information;

The service box router configured as the clock source generates synchronization clock information according to the clock information and sends the synchronization clock information to the main center box router, so that the main center box router acquires synchronization clock information.
The clock synchronization method of claim 1 , wherein when the primary center frame router is configured as a clock source, the primary center frame router acquires synchronization clock information preset in the clock source, including:

The primary center frame router generates synchronous clock information according to its own clock information.
The clock synchronization method according to any one of claims 1 to 4, wherein the cluster routing system further comprises a backup center box router, and the clock synchronization method further comprises:

When the primary center frame router fails to obtain the synchronous clock information preset in the clock source, the primary center frame router performs switching between the primary central frame router and the standby primary central frame router.
A main center box router, including:

The clock source setting module is configured to set a clock source according to the configuration data input by the user, where the clock source is a central center frame router or a service box router;

a synchronization clock information acquisition module, configured to acquire synchronization clock information preset in the clock source, where the synchronization clock information includes frequency synchronization information and phase synchronization information;

The first sending module is configured to send the synchronous clock information to a corresponding router according to the type of the clock source, so that the router performs clock synchronization.
The primary center frame router of claim 6, further comprising a first synchronization module configured to synchronize the self clock according to the synchronization clock information after receiving the synchronization clock information.
The main center frame router according to claim 6, wherein the synchronous clock information acquisition module acquires a synchronization clock preset in the clock source when the main center frame router is set as a clock source by the clock source setting module. The information includes: the synchronous clock information acquiring module generates synchronous clock information according to the clock information of the main center frame router itself.
The primary center frame router according to any one of claims 6 to 8, further comprising a switching module configured to: when the synchronous clock information acquiring module fails to acquire a preset in the clock source When the clock information is synchronized, the switch to the standby center frame router is performed.
A service box router in the clock synchronization method according to any one of claims 1 to 5, comprising:

a second synchronization module, configured to: when the service box router is configured as a clock source, acquire clock information of a preset external clock source, and synchronize the clock according to the clock information;

The second sending module is configured to generate synchronous clock information according to the clock information, and send the synchronous clock information to the primary center frame router, so that the primary center frame router obtains synchronous clock information.
The service box router according to claim 10, wherein the second synchronization module is further configured to: after the service box router is not a clock source, after receiving the synchronization clock information sent by the main center frame router, according to the synchronization The clock information synchronizes its own clock.
A trunking routing system, comprising: a main center box router and at least two service box routers, wherein the main center box router comprises the main center box router according to any one of claims 6 to 9; A service box router according to any one of claims 10 to 11.
A computer readable storage medium storing program instructions that, when executed, can implement the method of any one of claims 1 to 5.