WO2015131569A1

WO2015131569A1 - Cross-network-element protection processing method, protection method, apparatus and system in passive optical network

Info

Publication number: WO2015131569A1
Application number: PCT/CN2014/092148
Authority: WO
Inventors: 张理慧; 欧阳海明
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-10-17
Filing date: 2014-11-25
Publication date: 2015-09-11
Also published as: CN105577335A

Abstract

The present invention provides a cross-network-element protection processing method, a protection method, an apparatus and a system in a passive optical network. The protection processing method comprises: a first network element where a working port is located obtains an IP address of a second network element where a protection port is located, the first network element and the second network element being located in a same protection group in a passive optical network; the first network element sends, according to the IP address, an IP packet to the second network element, the IP packet carrying service configuration data or a switchover instruction used for triggering a port switchover. The use of a technical scheme provided by the present invention solves technical problems of low efficiency in switching the working port and the protection port, complicated operation and the like in the related art, thereby improving switchover efficiency, and simplifying operation steps because a process of independently configuring two network elements manually is omitted.

Description

Protection processing and protection method, device and system for passive optical network across network elements

Technical field

The present invention relates to the field of communications, and in particular to a protection processing and protection method, device, and system for a passive optical network across network elements.

Background technique

Passive Optical Network (PON) is a pure media network that avoids electromagnetic interference and lightning impact of external devices, reduces the failure rate of lines and external devices, improves system reliability, and saves maintenance costs. It is a technology that the telecom maintenance department has long expected.

In current passive optical network technologies, PON protection includes protection between different ports on the same network element and protection between different ports of different network elements in the system. However, there are still some shortcomings and deficiencies in the current cross-network element protection technology:

The two NEs in the protection group cannot communicate with each other. The working port and the protection port cannot know the status of the other party. The switch can be switched between the ports in the interleaving mode. Therefore, the fast switching cannot be guaranteed.

The service configuration data between the two NEs needs to be manually configured by the operator separately on the two NEs. When the configuration data is large, the operation is cumbersome and error-prone.

In view of the above problems in the related art, there is currently no effective solution.

Summary of the invention

The invention provides a protection processing and protection method, device and system for a cross-network element of a passive optical network, so as to at least solve the technical problems of low switching efficiency and cumbersome operation of the working port and the protection port in the related art.

According to an embodiment of the present invention, a method for protecting a passive optical network across network elements is provided, including: obtaining, by the first network element where the working port is located, an IP address of a second network element where the protection port is located, where the a network element and the second network element are located in the same protection group in the passive optical network; the first network element sends an IP packet to the second network element according to the IP address, where the IP The packet carries service configuration data or a switching instruction for triggering port switching.

Preferably, the first network element where the working port is located obtains the IP address of the second network element where the protection port is located, and the first network element obtains the IP address from the local pre-configuration information.

Preferably, after the first network element where the working port is located obtains the IP address of the second network element where the protection port is located, the method includes: the first network element establishing an IP channel between the first network element and the second network element; The first network element periodically sends a heartbeat packet to the second network element by using the IP channel, where the heartbeat packet is an IP packet.

Preferably, the IP packet carries the following information: an IP address of the source network element, information of the protection group where the destination network element is located, and an identifier used to distinguish the service configuration data or the switching instruction.

Preferably, before the first network element where the working port is located obtains the IP address of the second network element where the protection port is located, the method includes: the first network element detects that the link where the working port is located is faulty, or the first network The element detects that the service configuration data has changed.

According to another embodiment of the present invention, a method for protecting a passive optical network across network elements is provided, including: the second network element where the protection port is located receives the IP packet from the first network element where the working port is located, where The first network element and the second network element are located in the same protection group in the passive optical network, where the IP packet carries service configuration data or a switching instruction for triggering port switching; The second network element configures the protection port according to the service configuration data, or sets the protection port as a working port under the trigger of the switching instruction.

Preferably, the method further includes at least one of the following: when the local service configuration data of the second network element changes, the second network element sends the changed local service configuration data to the first network element; The second network element sends a heartbeat packet to the first network element, where the heartbeat packet is an IP packet.

According to still another embodiment of the present invention, a protection processing device for a cross-network element of a passive optical network is provided, which is applied to a first network element where a working port is located, and the device includes: an acquiring module, configured to acquire a protection port. An IP address of the second network element, wherein the first network element and the second network element are located in a same protection group in the passive optical network; and the sending module is configured to go to the second network according to the IP address The element sends an IP packet, where the IP packet carries service configuration data or a switching instruction for triggering port switching.

Preferably, the sending module is further configured to send the IP packet carrying the following information: an IP address of the source network element, information of the protection group where the destination network element is located, used to distinguish the service configuration data or the The identifier of the switching instruction.

According to still another embodiment of the present invention, a protection device for a passive optical network across network elements is provided, which is applied to a second network element where a protection port is located, and the device includes: a receiving module, configured to receive from a working port An IP packet of a network element, where the first network element and the second network element are located in a same protection group in the passive optical network, where the IP packet carries service configuration data or uses The switching module is configured to trigger a port switching, and the configuration module is configured to configure the protection port according to the service configuration data, or set the protection port as a working port triggered by the switching instruction.

Preferably, the device further includes: a first sending module, configured to send the changed local service configuration data to the first network element when the local service configuration data of the second network element changes; and Or the second sending module is configured to send a heartbeat packet to the first network element, where the heartbeat packet is an IP packet.

According to still another embodiment of the present invention, a protection system for a cross-network element of a passive optical network is provided, including: a first network element where the working port is located and a second network element where the protection port is located, where the first network element is set Obtaining an IP address of the second network element where the protection port is located, where the first network element and the second network element are located in a same protection group in the passive optical network; and according to the IP address, the The second network element is configured to receive the IP packet, where the IP packet carries the service configuration data or the switching instruction for triggering the port switching. The second network element is configured to receive the first network element. An IP packet; and configuring the protection port according to the service configuration data, or setting the protection port as a working port under the trigger of the switching instruction.

According to the present invention, the first network element where the working port is located sends a technical means for carrying the service configuration data or the switching instruction for triggering the port switching to the second network element according to the IP address of the second network element where the obtained protection port is located. The technical problems of low switching efficiency and complicated operation of the working port and the protection port in the related art are solved, thereby improving the efficiency of the switching, and simplifying the operation steps by eliminating the manual configuration process between the two network elements.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flowchart of a method for protecting a cross-network element of a passive optical network according to an embodiment of the present invention;

2 is a structural block diagram of a protection processing apparatus for a cross-network element of a passive optical network according to an embodiment of the present invention;

3 is a structural block diagram of a protection processing apparatus for a cross-network element of a passive optical network according to an embodiment of the present invention;

4 is a flowchart of a method for protecting a passive optical network across network elements according to an embodiment of the present invention;

FIG. 5a is a structural block diagram of a protection device for a passive optical network across network elements according to an embodiment of the present invention; FIG.

FIG. 5b is another structural block diagram of a protection device for a passive optical network across network elements according to an embodiment of the present invention; FIG.

6 is a structural diagram of a heartbeat maintenance IP packet according to a preferred embodiment of the present invention;

7 is a structural diagram of a data configuration message according to a preferred embodiment of the present invention;

8 is a block diagram of a protection system for a passive optical network in accordance with a preferred embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

FIG. 1 is a flowchart of a method for protecting a cross-network element of a passive optical network according to an embodiment of the present invention. As shown in Figure 1, the method includes:

Step S102: The first network element where the working port is located obtains the IP address of the second network element where the protection port is located, where the first network element and the second network element are located in the same protection group in the passive optical network.

Step S104: The first network element sends an IP packet to the second network element according to the foregoing IP address, where the IP packet carries service configuration data or a switching instruction for triggering port switching.

The first network element can send an IP packet to the second network element, and the switching instruction can be carried in the IP packet, so that the network element where the working port is located and the network element where the protection port is located are implemented. During the communication, the working port can know the status of the protection port and implement fast switching. At the same time, the service configuration data can be carried in the IP packet to avoid the cumbersome operation of the operator separately configuring the protection port and the working port.

In the implementation of the step S102, the IP address can be obtained from the third-party device in real time. In a preferred embodiment of the present embodiment, the first network element can be configured from the local pre-configuration information. Obtain the above IP address.

In order to maintain the activation state of the link, in a preferred embodiment of the present invention, after the first network element where the working port is located obtains the IP address of the second network element where the protection port is located, the first network element establishes the first network element and the first network element. The IP channel between the two network elements; the first network element periodically sends a heartbeat packet to the second network element through the foregoing IP channel, where the heartbeat packet is an IP packet. In a preferred implementation, the heartbeat packet may also carry a source IP address and protection group information (such as a PON port ID of the destination network element).

In this embodiment, the IP packet sent by the first network element to the second network element may also carry the following information: the IP address of the source network element and the information of the protection group where the destination network element is located, and used to distinguish the service. The configuration data or the identification of the switching instruction. The IP address of the source NE can be used to check whether the received IP packet is accurate at the receiving end.

In a preferred embodiment, in order to save operating resources, step S102 may be performed based on the following triggering conditions: that is, before the first network element where the working port is located obtains the IP address of the second network element where the protection port is located, the first network element detects the foregoing The link of the working port is faulty. The first network element detects that the service configuration data changes, that is, the service configuration data is updated.

The embodiment of the present invention further provides a protection processing device for a cross-network element of a passive optical network, where the device can be applied to a first network element where a working port is located, and the device is used to implement the foregoing method, as shown in FIG. include:

The obtaining module 20 is configured to obtain an IP address of the second network element where the protection port is located, where the first network element and the second network element are located in the same protection group in the passive optical network;

The sending module 22 is connected to the obtaining module 20 and configured to send an IP packet to the second network element according to the IP address, where the IP packet carries service configuration data or a switching instruction for triggering port switching.

In a preferred implementation, the sending module 22 is further configured to send an IP packet carrying the following information: an IP address of the source network element, information of the protection group where the destination network element is located, and information for distinguishing the service configuration data or the The identifier of the switching instruction.

In a preferred embodiment, the acquisition module 20 is arranged to obtain the above IP address from local pre-configuration information.

In a preferred embodiment of the present invention, as shown in FIG. 3, the protection processing device for the passive optical network across the network element further includes: a detecting module 24, configured to detect that the working port detects the link where the working port is located Failure, or, it is detected that the above service configuration data is updated.

It should be noted that each of the foregoing modules may be implemented by software or hardware. For the latter, the foregoing modules may be implemented by: each of the foregoing modules being located in the same processor; or each of the foregoing modules being located in different processors. .

The embodiment of the invention further provides a method for protecting a passive optical network across network elements. As shown in FIG. 4, the method includes the following processing steps:

Step S402, the second network element where the protection port is located receives the IP packet from the first network element where the working port is located, where the first network element and the second network element are located in the same protection group in the passive optical network, where The IP packet carries service configuration data or a switching instruction for triggering port switching.

Step S404, the second network element configures the protection port according to the service configuration data, or sets the protection port as a working port under the trigger of the switching instruction.

In the method for protecting a passive optical network across network elements provided by the embodiments of the present invention, at least one of the following processes is also provided:

(1) When the local service configuration data of the second network element is changed, the second network element sends the changed local service configuration data to the first network element; that is, the second network element can also perform service configuration. The data is updated and then synchronized to the first network element described above.

(2) The second network element sends a heartbeat packet to the first network element, where the heartbeat packet is an IP packet. That is, the second network element can also maintain the link in an active state.

Therefore, for the sending of the heartbeat packet and the update of the configuration data, the second network element where the protection port is located may also be sent to the first network element. Only the switching command is sent by the first network element to the second network element. After the switchover is successful, the first network element and the second network element can perform role exchange.

The IP packet provided in this embodiment may also carry the following information: an IP address of the source network element, information of the protection group where the destination network element is located, and an identifier used to distinguish the service configuration data or the switching instruction.

The embodiment of the present invention further provides a protection device for a cross-network element of a passive optical network, which is applied to a second network element where the protection port is located. The device is used to implement the foregoing method. As shown in FIG. 5a, the device includes:

The receiving module 50 is configured to receive an IP packet from the first network element where the working port is located, where the first network element and the second network element are located in a same protection group in the passive optical network, where the IP packet is The file carries service configuration data or a switching instruction for triggering port switching;

The configuration module 52 is connected to the receiving module 50, configured to configure the protection port according to the service configuration data, or set the protection port as a working port under the trigger of the switching instruction.

The protection device for the cross-network element of the passive optical network provided by the embodiment of the present invention, as shown in FIG. 5b, may further include: a first sending module 54 configured to: when the local service configuration data of the second network element changes, Sending the changed local service configuration data to the first network element; and/or, the second sending module 56 is configured to send a heartbeat packet to the first network element, where the heartbeat packet is an IP packet.

It should be noted that the second network element may also implement detection of configuration data changes, and may also acquire functions such as an IP address of the first network element. Of course, the foregoing functions may also be implemented by corresponding functional modules: for example, respectively, by detecting The module and the acquisition module are implemented, but are not limited to this.

The embodiment of the present invention further provides a protection system for a cross-network element of a passive optical network, including: a first network element where the working port is located and a second network element where the protection port is located, where the first network element is configured to acquire a protection port. An IP address of the second network element, where the first network element and the second network element are located in the same protection group in the passive optical network, and send the IP packet to the second network element according to the IP address. The IP packet carries service configuration data or a switching instruction for triggering port switching. The second network element is configured to receive an IP packet from the first network element, and according to the service configuration data. The protection port is configured, or the protection port is set as a working port under the trigger of the above-mentioned switching instruction.

It should be noted that the limitation of the technical features in the foregoing method embodiments is also applicable to the limitation of corresponding or the same technical features in the protection system of the above-mentioned passive optical network across network elements.

For a better understanding of the above embodiments, the following detailed description will be given in conjunction with the preferred embodiments. The main design of the preferred embodiment is that the service configuration data can be synchronized between the active and standby ports in the IP packet mode. That is, the data of the working port or the protection port is configured on one NE. The system automatically synchronizes the port to the peer NE and keeps the configuration data consistent. When the protection group is switched, the NE that the primary port is configured to notify the network element where the standby port resides in IP packets and complete the switchover of the standby NE port.

The following takes IPv4 packets as an example for detailed description.

First, establish a cross-network element PON protection system:

Step 1: Configure the IP address and protection port of the peer NE on the two NEs, and specify one as the working port and the other as the protection port.

Step 2: The system automatically establishes an IP channel between two NEs and maintains the link heartbeat state (the network element at the sending end and the network element at the receiving end can periodically send heartbeat packets to each other);

The network element periodically sends an IP packet carrying the protection group information to the peer network element. When the network element receives the IP packet from the peer network element carrying the protection group information within a certain period of time, the network element maintains the activation state of the link. The heartbeat maintenance IP packet structure is shown in Figure 6.

Step 3: The working port network element automatically sends the configuration data of the working port to the network element where the protection port is located through the IP channel in step 2. When one network element (any one of the working port NE and the protected port network element) When the port is configured with the service, the system automatically extracts the IP address of the peer NE and the protection group port information of the protection group, and sends the configuration data to the peer network element.

Step 4: The network element where the protection port is located receives the IP packet carrying the protection group information from the network element where the working port is located, and then parses the data and configures the data to the protection port. The structure of the data synchronization IP packet (that is, the data configuration packet) As shown in Figure 7.

Second, the specific implementation of protection switching

Step 1: When the working port detects the link interruption, the working port network element switches the working port to the standby state, and reads the IP address of the peer network element, and sends the switching command to the protection port through the IP channel in step 2. Network element

Step 2: The network element where the protection port is located receives the IP packet from the peer NE, parses the switchover command, sets the protection port as the active state, and completes the protection switchover.

8 is a block diagram of a protection system for a passive optical network in accordance with a preferred embodiment of the present invention. As shown in Figure 8, the optical network unit (Optical Network Unit, ONU) is connected to the working port and the protection port by optical fibers. The NEs where the working port resides and the protection port are connected to the IP network.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

According to the foregoing technical solution provided by the embodiment of the present invention, the first network element where the working port is located is configured to send the service configuration data or trigger the port switching to the second network element according to the IP address of the second network element where the obtained protection port is located. The technical means of the switching instruction solves the switching efficiency of the working port and the protection port in the related art The technical problems such as low operation and cumbersome operation improve the efficiency of the switching, and at the same time, the operation steps are simplified by eliminating the manual configuration process between the two network elements.

Claims

A method for protecting and processing a cross-network element of a passive optical network includes:

The first network element where the working port is located obtains the IP address of the second network element where the protection port is located, where the first network element and the second network element are located in the same protection group in the passive optical network;

The first network element sends an IP packet to the second network element according to the IP address, where the IP packet carries service configuration data or a switching instruction for triggering port switching.
The method of claim 1, wherein the first network element where the working port is located obtains the IP address of the second network element where the protection port is located, including:

The first network element obtains the IP address from local pre-configuration information.
The method of claim 1, wherein after the first network element where the working port is located obtains the IP address of the second network element where the protection port is located, the method includes:

The first network element establishes an IP channel between the first network element and the second network element;

The first network element periodically sends a heartbeat packet to the second network element by using the IP channel, where the heartbeat packet is an IP packet.
The method according to claim 1, wherein the IP packet further carries the following information:

The IP address of the source NE, the information of the protection group where the destination NE is located, and the identifier used to distinguish service configuration data or switching instructions.
The method according to any one of claims 1 to 4, wherein before the first network element where the working port is located obtains the IP address of the second network element where the protection port is located, the method includes:

The first network element detects that the link where the working port is located is faulty, or the first network element detects that the service configuration data is changed.
A method for protecting a passive optical network across network elements, comprising:

The second network element where the protection port is located receives the IP packet from the first network element where the working port is located, where the first network element and the second network element are located in the same protection group in the passive optical network, where The IP packet carries service configuration data or a switching instruction for triggering port switching.

The second network element configures the protection port according to the service configuration data, or sets the protection port as a working port under the trigger of the switching instruction.
The method of claim 6 further comprising at least one of the following:

When the local service configuration data of the second network element is changed, the second network element sends the changed local service configuration data to the first network element;

The second network element sends a heartbeat packet to the first network element, where the heartbeat packet is an IP packet.
The method according to claim 6, wherein the IP packet further carries the following information:

The IP address of the source NE, the information of the protection group where the destination NE is located, and the identifier used to distinguish service configuration data or switching instructions.
A protection device for a cross-network element of a passive optical network is applied to the first network element where the working port is located, including:

An acquiring module, configured to obtain an IP address of a second network element where the protection port is located, where the first network element and the second network element are located in a same protection group in the passive optical network;

The sending module is configured to send an IP packet to the second network element according to the IP address, where the IP packet carries service configuration data or a switching instruction for triggering port switching.
The apparatus according to claim 9, wherein the sending module is further configured to send the IP packet carrying the following information:

The IP address of the source NE, the information of the protection group where the destination NE is located, and the identifier used to distinguish the service configuration data or the switching instruction.
A protection device for a cross-network element of a passive optical network is applied to a second network element where the protection port is located, and the device includes:

The receiving module is configured to receive an IP packet from the first network element where the working port is located, where the first network element and the second network element are located in a same protection group in the passive optical network, where the The IP packet carries service configuration data or a switching instruction for triggering port switching.

The configuration module is configured to configure the protection port according to the service configuration data, or set the protection port as a working port under the trigger of the switching instruction.
The device according to claim 11, further comprising:

The first sending module is configured to send the changed local service configuration data to the first network element when the local service configuration data of the second network element changes; and/or

The second sending module is configured to send a heartbeat packet to the first network element, where the heartbeat packet is an IP packet.
A protection system for a cross-network element of a passive optical network includes: a first network element where the working port is located and a second network element where the protection port is located,

The first network element is configured to obtain an IP address of a second network element where the protection port is located, where the first network element and the second network element are located in a same protection group in the passive optical network; The IP address sends an IP packet to the second network element, where the IP packet carries service configuration data or a switching instruction for triggering port switching.

The second network element is configured to receive an IP packet from the first network element, and configure the protection port according to the service configuration data, or the triggering is performed by the switching instruction The protection port is set to the working port.