Network element management method, optical line terminal and communication network

Abstract

The invention discloses a network element management method, an optical line terminal and a communication network, and relates to the field of optical networks. The method comprises the following steps: when a link between a first optical line terminal and a network management system fails, receiving a first management message sent by a second optical line terminal, and executing a management operation of the network management system on the first optical line terminal according to a management identifier indicated by the first management message. Therefore, the plurality of optical line terminals are interconnected, and after the link between the first optical line terminal and the network management system fails, the second optical line terminal connected with the first optical line terminal forwards the management message, so that the network management system can manage the first optical line terminal in time and does not take off the management of the first optical line terminal; and the network element management reliability of the network management system is improved. Besides, uplink networking between the optical line terminal and the network management system does not need to be changed, or an out-of-band switch does not need to be additionally arranged between the optical line terminal and the network management system, and the scheme provided by the invention is easy to implement and low in cost.

Description

Technical Field

[0001] The present application relates to the field of optical networks, and in particular to a network element management method, an optical line terminal and a communication network. Background Art

[0002] Usually, the network management system connects to the network element (such as the optical line terminal (OLT)) through optical fiber to remotely manage the network element. For example, network element fault management, configuration management, and performance management. When the link between the network element and the network management system fails, such as the optical fiber failure between the network element and the network management system, or the interface failure of the network element, or the interface failure of the network management system, the network management system cannot manage the network element, and the network element is out of management.

[0003] At present, dual uplinks are used between network elements and network management systems, that is, two optical fibers are connected between network elements and network management systems, or switches are deployed between network elements and network management systems to realize out-of-band channels for communication between network elements and network management systems, so as to reduce the phenomenon of network elements being out of management. However, this leads to a waste of optical fiber resources or transmission resources. Summary of the invention

[0004] The present application provides a network element management method, an optical line terminal and a communication network, thereby improving the reliability of the network element management by the network management system without changing the connection relationship between the optical line terminal and the network management system.

[0005] In a first aspect, a network element management method is provided. The method is applied to a communication network. The communication network includes a network management system and multiple optical line terminals. The multiple optical line terminals are connected to each other. The multiple optical line terminals include a first optical line terminal and a second optical line terminal. The method is executed by the first optical line terminal. The method includes: when a link between the first optical line terminal and the network management system fails and the first optical line terminal is disconnected from the network management system, receiving a first management message sent by the second optical line terminal, and executing a management operation of the network management system on the first optical line terminal according to a management identifier indicated by the first management message.

[0006] Compared with connecting two optical fibers between the optical line terminal and the network management system, which leads to a waste of optical fiber resources, or adding a switch between the optical line terminal and the network management system to realize an out-of-band channel for communication between the optical line terminal and the network management system, which leads to a waste of transmission resources. The present application provides a solution, by interconnecting multiple optical line terminals, messages can be forwarded between the optical line terminals. After the link between the first optical line terminal and the network management system fails, the second optical line terminal connected to the first optical line terminal forwards the management message of the network management system for the first optical line terminal, that is, the link between the second optical line terminal and the network management system, and the link between the second optical line terminal and the first optical line terminal, are used as backup paths for the network management system to send management messages to the first optical line terminal, so that the network management system can manage the first optical line terminal in time, does not lose management of the first optical line terminal, and improves the reliability of the network management system for network element management.

[0007] In addition, there is no need to change the uplink networking between the optical line terminal and the network management system, or to deploy an additional out-of-band switch between the optical line terminal and the network management system. The solution provided by the present application is easy to implement and has low cost.

[0008] In a possible implementation, receiving a first management message sent by a second optical line terminal includes: receiving a first message sent by the second optical line terminal, the first message including a first management message; wherein the first management message is located in a payload field of the first message; a header of the first message includes a source address and a destination address, the source address is used to indicate a neighbor address of the second optical line terminal, the destination address is used to indicate a neighbor address of the first optical line terminal, and the neighbor address of the first optical line terminal and the neighbor address of the second optical line terminal are used for communication between the first optical line terminal and the second optical line terminal.

[0009] Since multiple optical line terminals are interconnected, multiple optical line terminals can form a local area network, and the first management message is encapsulated in a message suitable for transmission in the local area network, so that the first optical line terminal can receive the first management message sent by the network management system to the first optical line terminal.

[0010] In another possible implementation manner, the method further includes: sending a first management response message, where the first management response message is used to indicate a result of the management operation.

[0011] Thus, after the first optical line terminal completes the management operation of the network management system, the optical line terminal connected to the first optical line terminal can feed back the result of the management operation to the network management system so that the network management system can know whether the management of the first optical line terminal is successful or not.

[0012] In another possible implementation, sending a first management response message includes: sending a second message to a second optical line terminal, the second message including the first management response message; wherein the first management response message is located in a payload field of the second message; a header of the second message includes a source address and a destination address, the source address is used to indicate a neighbor address of the first optical line terminal, and the destination address is used to indicate a neighbor address of the second optical line terminal.

[0013] Since multiple optical line terminals are interconnected, multiple optical line terminals can form a local area network, encapsulate the first management response message in a message suitable for transmission in the local area network, and use the second optical line terminal connected to the first optical line terminal to feed back the result of the management operation to the network management system.

[0014] In a second aspect, a network element management method is provided, the method is applied to a communication network, the communication network includes a network management system and multiple optical line terminals, the multiple optical line terminals are connected to each other, the multiple optical line terminals include a first optical line terminal and a second optical line terminal, the method is executed by the second optical line terminal, the method includes: receiving a first management message sent by the network management system, and sending the first management message to the first optical line terminal. The first management message is used to indicate the management operation of the network management system on the first optical line terminal.

[0015] The present application provides a solution that interconnects multiple optical line terminals so that messages can be forwarded between the optical line terminals. After a link failure occurs between the first optical line terminal and the network management system, the second optical line terminal connected to the first optical line terminal forwards the management message for the first optical line terminal, that is, the link between the second optical line terminal and the network management system, and the link between the second optical line terminal and the first optical line terminal, are used as backup paths for the network management system to send management messages to the first optical line terminal, so that the network management system can manage the first optical line terminal in a timely manner, and the first optical line terminal is not out of management, thereby improving the reliability of the network management system's management of network elements. In addition, there is no need to change the uplink networking between the optical line terminal and the network management system, or to deploy an additional out-of-band switch between the optical line terminal and the network management system. The solution provided by the present application is easy to implement and low in cost.

[0016] In a possible implementation, receiving a first management message sent by a network management system includes: receiving a second management message sent by the network management system, the second management message including the first management message; wherein the first management message is located in a payload field of the second management message; and a header of the second management message includes a source address, a destination address, and an agent identifier. The source address is used to indicate an address of the network management system. The destination address is used to indicate a management address of a second optical line terminal. The management address of the second optical line terminal is used for the second optical line terminal to communicate with the network management system. The agent identifier is used to indicate that the second management message is a agent message.

[0017] In this way, the first management message is encapsulated in a message suitable for communication between the second optical line terminal and the network management system. The second optical line terminal acts as a proxy network element to forward the management message of the network management system to the first optical line terminal, thereby realizing the management operation of the network management system on the first optical line terminal after a link failure between the first optical line terminal and the network management system.

[0018] In another possible implementation, sending a first management message to a first optical line terminal includes: sending a first message to the first optical line terminal, the first message including a first management message; wherein the first management message is located in a payload field of the first message; a header of the first message includes a source address and a destination address, the source address is used to indicate a neighbor address of the second optical line terminal, the destination address is used to indicate a neighbor address of the first optical line terminal, and the neighbor address of the first optical line terminal and the neighbor address of the second optical line terminal are used for communication between the first optical line terminal and the second optical line terminal.

[0019] Since multiple optical line terminals are interconnected, multiple optical line terminals can form a local area network, and the first management message is encapsulated in a message suitable for transmission in the local area network, so as to forward the first management message sent by the network management system to the first optical line terminal to the first optical line terminal.

[0020] In another possible implementation manner, the method further includes: receiving a first management response message sent by the first optical line terminal, where the first management response message is used to indicate a result of the management operation.

[0021] Thus, after the first optical line terminal completes the management operation of the network management system, the second optical line terminal connected to the first optical line terminal feeds back the result of the management operation to the network management system so that the network management system can know whether the management of the first optical line terminal is successful or not.

[0022] In another possible implementation, receiving a first management response message sent by a first optical line terminal includes: receiving a second message sent by the first optical line terminal, the second message including the first management response message; wherein the first management response message is located in a payload field of the second message. A header of the second message includes a source address and a destination address. The source address is used to indicate a neighbor address of the first optical line terminal. The destination address is used to indicate a neighbor address of the second optical line terminal.

[0023] Since multiple optical line terminals are interconnected, multiple optical line terminals can form a local area network, encapsulate the first management response message in a message suitable for transmission in the local area network, and use the second optical line terminal connected to the first optical line terminal to feed back the result of the management operation to the network management system.

[0024] In another possible implementation, the method further includes: sending a second management response message to the network management system, the second management response message including the first management response message; wherein the first management response message is located in the payload field of the second management response message. The header of the second management response message includes a source address and a destination address. The source address is used to indicate the management address of the second optical line terminal. The destination address is used to indicate the address of the network management system.

[0025] In this way, the second management response message is encapsulated in a message suitable for communication between the second optical line terminal and the network management system, so as to forward the result of the management operation of the first optical line terminal through the link between the second optical line terminal and the network management system.

[0026] In a third aspect, a network element management method is provided, the method is applied to a communication system, the communication system includes a network management system and multiple optical line terminals, the multiple optical line terminals are connected to each other, the multiple optical line terminals include a first optical line terminal and a second optical line terminal, the method is executed by the network management system, the method includes: when the network management system detects a link failure between the first optical line terminal and the network management system, sending a first management message to the second optical line terminal, receiving a first management response message sent by the second optical line terminal, wherein the first management message is used to indicate the management operation of the network management system on the first optical line terminal. The first management response message is used to indicate the result of the management operation.

[0027] The present application provides a solution that interconnects multiple optical line terminals so that messages can be forwarded between the optical line terminals. After a link failure occurs between the first optical line terminal and the network management system, the link between the second optical line terminal and the network management system, and the link between the second optical line terminal and the first optical line terminal are used as backup paths for the network management system to send management messages to the first optical line terminal. The network management system forwards the management message for the first optical line terminal through the second optical line terminal connected to the first optical line terminal, so that the network management system can manage the first optical line terminal in a timely manner, and the first optical line terminal is not out of management, thereby improving the reliability of the network management system's management of network elements. In addition, there is no need to change the uplink networking between the optical line terminal and the network management system, or to deploy an additional out-of-band switch between the optical line terminal and the network management system. The solution provided by the present application is easy to implement and has low cost.

[0028] In a possible implementation, sending a first management message to a second optical line terminal includes: sending a second management message to the second optical line terminal, the second management message including the first management message; wherein the first management message is located in a payload field of the second management message. A header of the second management message includes a source address and a destination address. The source address is used to indicate an address of a network management system. The destination address is used to indicate a management address of the second optical line terminal. The management address of the second optical line terminal is used for the second optical line terminal to communicate with the network management system.

[0029] In this way, the first management message is encapsulated in a message suitable for communication between the second optical line terminal and the network management system, so that the first management message sent by the network management system to the first optical line terminal is forwarded by the second optical line terminal.

[0030] In another possible implementation, receiving a first management response message sent by a second optical line terminal includes: receiving a second management response message sent by the second optical line terminal, the second management response message including the first management response message; wherein the first management response message is located in a payload field of the second management response message. The header of the second management response message includes a source address and a destination address. The source address is used to indicate a management address of the second optical line terminal. The destination address is used to indicate an address of a network management system.

[0031] In this way, the second management response message is encapsulated in a message suitable for communication between the second optical line terminal and the network management system, so as to forward the result of the management operation of the first optical line terminal through the link between the second optical line terminal and the network management system.

[0032] In another possible implementation, the method further includes: when the network management system detects that the link failure between the first optical line terminal and the network management system is restored, sending a third management message to the first optical line terminal based on the link between the network management system and the first optical line terminal.

[0033] In a fourth aspect, a network element management device is provided, wherein a communication network includes a network management system and a plurality of optical line terminals, the plurality of optical line terminals are connected to each other, and the plurality of optical line terminals include a first optical line terminal and a second optical line terminal; the network element management device is used to implement the function of the first optical line terminal. The device includes: a communication module, used to receive a first management message sent by the second optical line terminal when a link between the first optical line terminal and the network management system fails; and a processing module, used to execute a management operation of the network management system on the first optical line terminal according to a management identifier indicated by the first management message.

[0034] In a possible implementation, when the communication module receives the first management message sent by the second optical line terminal, it is specifically used to: receive the first message sent by the second optical line terminal, the first message includes the first management message; wherein the first management message is located in the payload field of the first message; the header of the first message includes a source address and a destination address, the source address is used to indicate the neighbor address of the second optical line terminal, the destination address is used to indicate the neighbor address of the first optical line terminal, and the neighbor address of the first optical line terminal and the neighbor address of the second optical line terminal are used for communication between the first optical line terminal and the second optical line terminal.

[0035] In another possible implementation manner, the communication module is further used to: send a first management response message, where the first management response message is used to indicate a result of the management operation.

[0036] In another possible implementation, when the communication module sends the first management response message, it is specifically used to: send a second message to the second optical line terminal, the second message including the first management response message; wherein the first management response message is located in the payload field of the second message; the header of the second message includes a source address and a destination address, the source address is used to indicate the neighbor address of the first optical line terminal, and the destination address is used to indicate the neighbor address of the second optical line terminal.

[0037] In a fifth aspect, a network element management device is provided, wherein the communication network includes a network management system and a plurality of optical line terminals, the plurality of optical line terminals are connected to each other, and the plurality of optical line terminals include a first optical line terminal and a second optical line terminal; the network element management device is used to implement the function of the second optical line terminal. The device includes: a communication module, which is used to receive a first management message sent by the network management system; the communication module is also used to send a first management message to the first optical line terminal. The first management message is used to instruct the network management system to perform management operations on the first optical line terminal.

[0038] In a possible implementation, when the communication module receives a first management message sent by the network management system, it is specifically used to: receive a second management message sent by the network management system, the second management message includes the first management message; wherein the first management message is located in the payload field of the second management message; the header of the second management message includes a source address, a destination address and an agent identifier, the source address is used to indicate the address of the network management system, the destination address is used to indicate the management address of the second optical line terminal, the management address of the second optical line terminal is used for the second optical line terminal to communicate with the network management system, and the agent identifier is used to indicate that the second management message is a agent message.

[0039] In another possible implementation, when the communication module sends the first management message to the first optical line terminal, it is specifically used to: send the first message to the first optical line terminal, the first message includes the first management message; wherein the first management message is located in the payload field of the first message; the header of the first message includes a source address and a destination address, the source address is used to indicate the neighbor address of the second optical line terminal, the destination address is used to indicate the neighbor address of the first optical line terminal, and the neighbor address of the first optical line terminal and the neighbor address of the second optical line terminal are used for communication between the first optical line terminal and the second optical line terminal.

[0040] In another possible implementation manner, the communication module is further used to: receive a first management response message sent by the first optical line terminal, where the first management response message is used to indicate a result of the management operation.

[0041] In another possible implementation, when the communication module receives the first management response message sent by the first optical line terminal, it is specifically used to: receive a second message sent by the first optical line terminal, the second message including the first management response message; wherein the first management response message is located in the payload field of the second message; the header of the second message includes a source address and a destination address, the source address is used to indicate a neighbor address of the first optical line terminal, and the destination address is used to indicate a neighbor address of the second optical line terminal.

[0042] In another possible implementation, the communication module is also used to: send a second management response message to the network management system, the second management response message including the first management response message; wherein the first management response message is located in the payload field of the second management response message; the header of the second management response message includes a source address and a destination address, the source address is used to indicate the management address of the second optical line terminal, and the destination address is used to indicate the address of the network management system.

[0043] In a sixth aspect, a network element management device is provided, wherein the communication system includes a network management system and a plurality of optical line terminals, the plurality of optical line terminals are connected to each other, and the plurality of optical line terminals include a first optical line terminal and a second optical line terminal; the network element management device is used to implement the functions of the network management system. The device includes: a communication module, which is used to send a first management message to the second optical line terminal when the network management system detects a link failure between the first optical line terminal and the network management system, and the first management message is used to indicate the management operation of the network management system on the first optical line terminal; the communication module is also used to receive a first management response message sent by the second optical line terminal, and the first management response message is used to indicate the result of the management operation.

[0044] In a possible implementation, when the communication module sends the first management message to the second optical line terminal, it is specifically used to: send the second management message to the second optical line terminal, the second management message includes the first management message; wherein the first management message is located in the payload field of the second management message; the header of the second management message includes a source address and a destination address, the source address is used to indicate the address of the network management system, the destination address is used to indicate the management address of the second optical line terminal, and the management address of the second optical line terminal is used for the second optical line terminal to communicate with the network management system.

[0045] In another possible implementation, when the communication module receives the first management response message sent by the second optical line terminal, it is specifically used to: receive the second management response message sent by the second optical line terminal, the second management response message includes the first management response message; wherein the first management response message is located in the payload field of the second management response message; the header of the second management response message includes a source address and a destination address, the source address is used to indicate the management address of the second optical line terminal, and the destination address is used to indicate the address of the network management system.

[0046] In another possible implementation, the communication module is further configured to: when the network management system detects that the link failure between the first optical line terminal and the network management system is restored, send a third management message to the first optical line terminal based on the link between the network management system and the first optical line terminal.

[0047] In a seventh aspect, a communication network is provided, the communication network comprising a network management system, a first optical line terminal and a second optical line terminal, the first optical line terminal and the second optical line terminal being connected; when a link between the first optical line terminal and the network management system fails, the network management system is used to send a first management message to the second optical line terminal; the second optical line terminal is used to receive the first management message sent by the network management system and forward the first management message to the first optical line terminal, the first management message being used to indicate the management operation of the network management system on the first optical line terminal; the first optical line terminal is used to receive the first management message sent by the second optical line terminal; the first optical line terminal is also used to execute the management operation of the network management system on the first optical line terminal according to the management identifier indicated by the first management message; the second optical line terminal is also used to receive the first management response message sent by the first optical line terminal, the first management response message being used to indicate the result of the management operation; the second optical line terminal is also used to send the first management response message to the network management system.

[0048] In a possible implementation, when the second optical line terminal receives the first management message sent by the network management system, it is specifically used to: receive the second management message sent by the network management system, the second management message includes the first management message; wherein the first management message is located in the payload field of the second management message; the header of the second management message includes a source address, a destination address and an agent identifier, the source address is used to indicate the address of the network management system, the destination address is used to indicate the management address of the second optical line terminal, the management address of the second optical line terminal is used for the second optical line terminal to communicate with the network management system, and the agent identifier is used to indicate that the second management message is a agent message.

[0049] In another possible implementation, when the first optical line terminal receives the first management message sent by the second optical line terminal, it is specifically used to: receive the first message sent by the second optical line terminal, the first message includes the first management message; wherein the first management message is located in the payload field of the first message; the header of the first message includes a source address and a destination address, the source address is used to indicate the neighbor address of the second optical line terminal, the destination address is used to indicate the neighbor address of the first optical line terminal, and the neighbor address of the first optical line terminal and the neighbor address of the second optical line terminal are used for communication between the first optical line terminal and the second optical line terminal.

[0050] In another possible implementation, when the second optical line terminal receives the first management response message sent by the first optical line terminal, it is specifically used to: receive a second message sent by the first optical line terminal, the second message includes the first management response message; wherein the first management response message is located in the payload field of the second message; the header of the second message includes a source address and a destination address, the source address is used to indicate the neighbor address of the first optical line terminal, and the destination address is used to indicate the neighbor address of the second optical line terminal.

[0051] In another possible implementation, when the second optical line terminal sends a first management response message to the network management system, it is specifically used to: send a second management response message to the network management system, the second management response message includes the first management response message; wherein the first management response message is located in the payload field of the second management response message; the header of the second management response message includes a source address and a destination address, the source address is used to indicate the management address of the second optical line terminal, and the destination address is used to indicate the address of the network management system.

[0052] In an eighth aspect, an optical line terminal is provided, the optical line terminal comprising an optical module, a memory and a processor, the memory being used to store a set of computer instructions; the optical module being used to receive or send data, and when the processor executes a set of computer instructions, the operating steps of the method described in the first aspect or any possible implementation of the first aspect are executed, or the operating steps of the method described in the second aspect or any possible implementation of the second aspect are executed, or the operating steps of the method described in the third aspect or any possible implementation of the third aspect are executed, so as to realize management of the optical line terminal by the network management system after the optical line terminal is disconnected from the network management system.

[0053] In a ninth aspect, a computer-readable storage medium is provided, comprising: computer software instructions; when the computer software instructions are executed in a processor, the processor executes the operating steps of the method described in the first aspect or any possible implementation of the first aspect, or executes the operating steps of the method described in the second aspect or any possible implementation of the second aspect, or executes the operating steps of the method described in the third aspect or any possible implementation of the third aspect, to realize that the network management system manages the network device after the network device is disconnected from the network management system.

[0054] In the tenth aspect, a computer program product is provided. When the computer program product runs on a computer, it enables the computer to execute the operating steps of the method described in the first aspect or any possible implementation of the first aspect, or execute the operating steps of the method described in the second aspect or any possible implementation of the second aspect, or execute the operating steps of the method described in the third aspect or any possible implementation of the third aspect, so as to realize that the network management system manages the network device after the network device is disconnected from the network management system.

[0055] The technical effects brought about by any design method in the fourth to tenth aspects can refer to the technical effects brought about by different design methods in the first to third aspects or the first to third aspects, and will not be repeated here.

[0056] Based on the implementations provided in the above aspects, the present application can also be further combined to provide more implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 A schematic diagram of a PON system architecture provided for this application;

[0058] Figure 2 A schematic diagram of another PON system architecture provided for this application;

[0059] Figure 3 A schematic diagram of a network management system and multiple optical line terminals provided by the prior art;

[0060] Figure 4 A schematic diagram of another network management system and multiple optical line terminals provided by the prior art;

[0061] Figure 5 A schematic diagram of the architecture of a communication network provided for this application;

[0062] Figure 6 A schematic diagram of a network management system and multiple optical line terminals provided in this application;

[0063] Figure 7 A flowchart of a network element management method provided in this application;

[0064] Figure 8 A schematic diagram of a message format provided for this application;

[0065] Fig. 9 A schematic diagram of a message format provided for this application;

[0066] Fig.10 A schematic diagram of the structure of a network element management device provided by this application;

[0067] Fig.11 A schematic diagram of the structure of an optical line terminal provided in this application. DETAILED DESCRIPTION

[0068] To facilitate understanding, the main terms involved in the embodiments of the present application are first explained.

[0069] Passive optical network (PON): is an implementation technology of optical access network (OAN). PON is an optical access technology for point-to-multipoint transmission. PON is an optical access network that provides users with high bandwidth and full services. PON can be divided into multiple modes according to the upstream and downstream rates and upstream and downstream wavelengths. For example, Ethernet passive optical network (EPON), Gigabit passive optical network (GPON) and 10Gbit passive optical network (XG-PON).

[0070] For example, Figure 1 A schematic diagram of the system architecture of a PON provided in this application. Figure 1 As shown, the passive optical network 100 mainly includes an optical line terminal (OLT) 110, an optical distribution network (ODN) 120 and at least one optical network unit (ONU) 130 or at least one optical network terminal (ONT) 140.

[0071] OLT is used to provide a network side interface for OAN. For example, one end of OLT is connected to the upper network to complete the upstream access of PON. The upper network can be an Internet protocol (IP) backbone network or a public switched telephone network (PSTN). The other end of OLT is connected to the user terminal device through ODN to complete the downstream transmission of PON and realize the control, management and ranging functions of the user terminal device. The user terminal device includes at least one of ONU or ONT.

[0072] One end of the user-end device is connected to the OLT through the ODN, and the other end of the user-end device is connected to other terminal devices, such as personal computers, fixed-line phones, etc. ONU works with OLT to implement Ethernet layer 2 and layer 3 functions and provide voice, data and multimedia services for users. For example, ONU can select and receive data sent by OLT; respond to management commands issued by OLT and make corresponding adjustments; cache user Ethernet data and send it to the uplink in the sending window allocated by OLT; and other user management functions.

[0073] ODN includes a passive optical splitter for optical power distribution, a trunk optical fiber connected between the passive optical splitter and the OLT, and a branch optical fiber connected between the passive optical splitter and the ONU. When transmitting data downstream, the ODN transmits the downstream data from the OLT to each ONU through the splitter. Similarly, when transmitting data upstream, the ODN aggregates the upstream data of the ONU and transmits it to the OLT. For example, Figure 1 In the embodiment, the ODN 120 provides an optical transmission channel between the OLT 110 and the ONU 130 , and the ODN 120 includes passive components such as an optical fiber 121 and a passive optical splitter (splitter) 122 .

[0074] ONU provides a user-side interface for OAN, and ONU is connected to ODN. If ONU provides user port function, such as ONU provides Ethernet user port or plain old telephone service (POTS) user port, it is called optical network termination (ONT). ONT can be a part of ONU. The difference between ONT and ONU is that ONT can be directly located at the user end, while ONU is an optical network unit, and there may be other networks between the user and the user, such as Ethernet. ONU can connect to various types of digital subscriber line (DSL) or Ethernet access gateway devices, and the gateway device is then connected to the network terminal. For the convenience of description, in the embodiments of the present application, the user-end devices are collectively referred to as ONTs.

[0075] like Figure 1 As shown, OLT is usually located in the center office (CO), and CO usually also includes network side equipment. Figure 1 The passive optical network 100 shown is suitable for deploying ONUs and ONTs in areas such as cities that are close to a central computer room.

[0076] In other embodiments, Figure 2As shown in Figure 1, OLT is no longer deployed in the central machine room, but is deployed closer to ONT, ONU and other devices. Figure 2 The passive optical network 100 shown may include more OLTs, so that users in more areas can access broadband services.

[0077] Element Management System (EMS): is a system that manages one or more telecommunication network elements (NE) of a specific type. For example, an EMS can manage the functions and capacity of a network element. An EMS can also be referred to as a network management system.

[0078] The network element management system provides unified operation and maintenance functions in the professional network field, focusing on the management of network elements within the region, network, and sub-network, and can manage and maintain equipment and networks end-to-end. For example, a network element management system can be used to centrally manage an operator's IP Multimedia Subsystem (IMS) network and equipment. IMS includes core network equipment, data communication equipment, Next Generation Network (NGN) equipment, business equipment, and third-party Information Technology (IT) equipment.

[0079] For another example, the network element management system included in the passive optical network remotely manages the OLT. Or alternatively, it can be described as the network element management system included in the passive optical network remotely manages the OLT network element. The network element management system may include one or more servers, and the server provides remote management functions for the network element. For example, the management functions include fault management, configuration management, and performance management. For example, Figure 1 As shown, the passive optical network 100 further includes a network element management system 150. The network element management system 150 can be connected to multiple OLTs 110 via optical fibers. The OLTs 110 and the network element management system 150 communicate via the OLT uplink optical port.

[0080] Optionally, the network element management system may also be connected to the OLT via a network device (such as a switch, a router).

[0081] In some embodiments, the link between the OLT and the network management system fails, causing the network management system to be unable to remotely manage the OLT, i.e., causing the OLT to be out of management. The OLT out of management failure has become a pain point for operators' operation and maintenance, especially in the scenario where the OLT has only a single uplink optical port.

[0082] The reasons for the link failure between the OLT and the network management system mainly include the optical fiber failure between the OLT and the network management system, or the interface failure of the OLT (such as: the optical module failure of the OLT), or the interface failure of the network management system (such as: the optical module failure of the network management system).

[0083] In order to enhance the reliability of network element management and reduce the problem of network element loss of management, dual uplinks can be used between the network element and the network management system. That is, two optical fibers are connected between the network element and the network management system. If one optical fiber between the network element and the network management system fails, the other optical fiber can be used for communication. Figure 3 The following is a schematic diagram of a network management system and multiple optical line terminals provided by the prior art. Figure 3 As shown, OLT network element 1, OLT network element 2 and OLT network element 3 are connected to network device 320 through two optical fibers respectively. Understandably, the optical fiber and interface module between the OLT network element and the network device realize dual backup protection, reducing the network management system from losing management of the OLT. The network management system 310 connects OLT network element 1, OLT network element 2 and OLT network element 3 through the network device 320. Among them, the network device 320 can be a switch or a router. The network management system 310 can be connected to the network device 320 through an optical fiber.

[0084] Assume that optical fiber 1 between OLT network element 1 and network device 320 fails, and optical fiber 2 between OLT network element 1 and network device 320 is unobstructed, OLT network element 1 communicates with network device 320 through optical fiber 2, and network management system 310 manages OLT network element 1 through optical fiber 2 between OLT network element 1 and network device 320.

[0085] Since the OLT uses dual uplink optical ports to communicate with the network management system, the optical fiber between the OLT and the network equipment needs to be doubled, resulting in a waste of optical fiber resources. The implementation cost of this solution is relatively high.

[0086] In other embodiments, a switch is additionally deployed between the network element and the network management system to implement an out-of-band channel for communication between the network element and the network management system. Figure 4 Another network management system and multiple optical line terminals provided by the prior art are shown in FIG. Figure 4 As shown, OLT network element 1, OLT network element 2 and OLT network element 3 are connected to network management system 410 through switch 420 respectively. Among them, OLT network element 1, OLT network element 2 and OLT network element 3 can be connected to switch 420 through Ethernet electrical ports of out-of-band channels. Switch 420 can be deployed in a central computer room. Switch 420 is connected to network management system 410 through optical fiber uplink. An out-of-band channel for communication between the network management system and OLT is realized to reduce the loss of management of OLT by the network management system.

[0087] Assuming that the link between the OLT network element 1 and the network device 430 fails, the OLT network element 1 communicates with the network management system 410 through the switch 420 , and the network management system 410 manages the OLT network element 1 through the switch 420 between the OLT network element 1 and the network management system 410 .

[0088] This solution has a high implementation cost because it requires additional deployment of switches with Ethernet electrical ports, which results in a waste of transmission resources.

[0089] In order to solve the problem of wasting optical fiber resources or transmission resources by changing the connection relationship between an optical line terminal and a network management system to ensure the reliability of the network management system for network elements, the present application provides a network element management method, that is, connecting multiple optical line terminals to each other, and messages can be forwarded between optical line terminals. When a link between a first optical line terminal and a network management system fails, a management message sent by the network management system to the first optical line terminal is forwarded by a second optical line terminal, so that the first optical line terminal performs the management operation of the network management system on the first optical line terminal according to the management identifier indicated by the management message.

[0090] In this way, the link between the second optical line terminal and the network management system, and the link between the second optical line terminal and the first optical line terminal are used as backup paths for the network management system to send management messages to the first optical line terminal. After a link failure occurs between the first optical line terminal and the network management system, the management message for managing the first optical line terminal is forwarded by the second optical line terminal connected to the first optical line terminal, so that the network management system can manage the first optical line terminal in a timely manner without losing management of the first optical line terminal, thereby improving the reliability of the network management system's management of network elements.

[0091] Compared with connecting two optical fibers between the optical line terminal and the network management system, which results in a waste of optical fiber resources, or deploying an additional out-of-band switch between the optical line terminal and the network management system, which results in a waste of transmission resources, the present application provides a solution without changing the uplink networking between the optical line terminal and the network management system, which effectively enhances the reliability of the network management system for network element management. The solution provided by the present application is easy to implement and has low cost.

[0092] The network element management method provided by the present application is described in detail below with reference to the accompanying drawings.

[0093] Figure 5 This is a schematic diagram of the architecture of a communication network provided by this application. Figure 5 As shown, the communication network 500 includes a network management system 510 and OLT network element 1, OLT network element 2 and OLT network element 3. The network management system 510 is connected to OLT network element 1, OLT network element 2 and OLT network element 3 through a network device 520. The network device 520 may be a switch or a router. The network management system 510 may be connected to the network device 520 through an optical fiber.

[0094] Among them, OLT network element 1, OLT network element 2 and OLT network element 3 are connected to each other. This application does not limit the connection method between multiple OLT network elements.

[0095] For example, Figure 5 As shown, OLT network element 1, OLT network element 2 and OLT network element 3 are connected to each other in pairs. OLT network element 1 is connected to OLT network element 2 and OLT network element 3 respectively. OLT network element 2 is connected to OLT network element 3. Thus, the reliability of message transmission between OLT network elements is improved.

[0096] Optionally, OLT network element 1, OLT network element 2 and OLT network element 3 are connected adjacently. OLT network element 1 is connected to OLT network element 2 respectively. OLT network element 2 is connected to OLT network element 3.

[0097] In some embodiments, multiple OLT network elements are connected to network cables through electrical ports to achieve interconnection of multiple OLT network elements. For example, multiple OLT network elements are located in the same machine room or a nearby machine room. Since the distance between multiple OLT network elements is relatively close, multiple OLT network elements can be interconnected through network cables.

[0098] Electrical ports are a general term for various twisted pair interfaces such as RJ45 in servers and networks. Electrical ports use electricity as the carrier medium for information, and sometimes they also include coaxial cable ports. Electrical ports may use Fast Ethernet (FE), Gigabit Ethernet (GE), 10 Gigabit Ethernet or other types of transmission protocols.

[0099] It should be understood that a switching module is provided on the control board of the OLT network element, an electrical port is provided on the panel of the OLT network element, and the OLT network element is connected to the network cable through the electrical port to facilitate the transmission of management messages of the network management system between multiple OLT network elements.

[0100] For example, Figure 6 As shown, the OLT network element 1 includes a main control board 11, a main control board 12 and a general purpose I / O ports (GPIO) board. The main control board 11 and the main control board 12 respectively include a processor (such as a central processing unit (CPU)) and an uplink module. The processor is used to process the message received by the OLT network element 1. The uplink module is used for the OLT network element 1 to communicate with the network element (such as the network device 520) to which the OLT network element 1 is connected.

[0101] The GPIO board includes a switching module, such as a LAN switch (Lan Switch, LSW) module. The switching module is used to transmit messages with the OLT network element 2 or the OLT network element 3. The switching module is connected to the processor via a Serial Gigabit Media Independent Interface (Serial Gigabit Media Independent Interface, SGMII) interface.

[0102] The panel of the OLT network element 1 is provided with an electrical port 1 and an electrical port 2. The OLT network element 1 is connected to the OLT network element 3 through the electrical port 2 via the electrical port 1. The OLT network element 1 is connected to the OLT network element 2 through the electrical port 1 via the electrical port 2. The OLT network element 2 is connected to the OLT network element 3 through the electrical port 1 via the electrical port 2.

[0103] The internal configuration of OLT network element 2 and OLT network element 3 is as described for OLT network element 1 and will not be described in detail herein.

[0104] Optionally, the switching module may also be arranged on the main control board. The present application does not limit the location of the switching module. If the OLT network element does not include an electrical port, a device electrical port may be added to the panel, or a device switching module may be added to the main control board or GPIO board to realize interconnection between OLT network elements.

[0105] In other embodiments, multiple OLT network elements are connected to optical fibers through optical ports to achieve interconnection of multiple OLT network elements. For example, multiple OLT network elements are located in different computer rooms that are far apart. Since the distance between multiple OLT network elements is far, multiple OLT network elements can be interconnected through optical fibers. Optical ports refer to the general term for various optical fiber ports in servers and networks. Optical ports use light as the carrier medium for information.

[0106] In addition, the present application does not limit the rate of the electrical port or the rate of the optical port interconnected between OLT network elements, and can be set according to actual needs.

[0107] Since the OLT network elements are interconnected, when the link between any OLT network element in the communication network and the network management system fails, the management message of the network management system to the OLT network element that is out of management is forwarded by other OLT network elements in the communication network, so that the OLT network element that is out of management performs the management operation of the network management system according to the management identifier indicated by the management message. For example, when the link between OLT network element 1 and the network management system fails, the management message sent by the network management system to OLT network element 1 is forwarded by OLT network element 2 or OLT network element 3, so that OLT network element 1 performs the management operation of the network management system to OLT network element 1 according to the management identifier indicated by the management message.

[0108] In some embodiments, after the OLT network elements are connected to each other, they can search for adjacent OLT network elements according to the Neighbor Discovery Protocol (NDP or ND) and report the neighbor addresses of the OLT network elements to the network management system, so that the network management system can obtain the topological relationship between the OLT network elements.

[0109] Optionally, the network administrator can manually configure the neighbor addresses of the OLT network elements and the topological relationship between the OLT network elements. The OLT network elements can send heartbeat messages to each other to ensure the connectivity between the OLT network elements. The OLT network elements can also automatically identify the channel connectivity with the network management system.

[0110] This application does not limit the method of selecting the proxy network element. For example, the network management system can select an OLT network element from OLT network element 2 and OLT network element 3 according to the topological relationship to forward the management message to OLT network element 1. For another example, the network management system can forward the management message from the OLT network element that is closer to OLT network element 1 to OLT network element 1. For another example, the network management system selects an OLT network element according to the priority of the OLT network element to forward the management message to OLT network element 1.

[0111] Figure 5 The device structure shown in the figure does not constitute a limitation on the communication network, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently. For example, the communication network may include more OLT network elements.

[0112] Next, the network element management method provided by the present application is described in detail with reference to the accompanying drawings.

[0113] See also Figure 7 , Figure 7 A flow chart of a network element management method provided in this application. Figure 5 As shown, OLT network element 1, OLT network element 2 and OLT network element 3 are connected to each other in pairs. Assuming that the link between OLT network element 1 and the network management system fails, the management message forwarded by OLT network element 2 is used as an example for explanation. The first optical line terminal may refer to OLT network element 1. The second optical line terminal may refer to OLT network element 2. Figure 7 As shown, the method includes the following steps.

[0114] Step 710: When the network management system detects a link failure between the first optical line terminal and the network management system, the network management system sends a first management message to the second optical line terminal.

[0115] When the network management system cannot send a message to the first optical line terminal, or the network management system cannot receive a message sent by the first optical line terminal, the link between the network management system and the first optical line terminal may fail. In some embodiments, the network management system may send a heartbeat message to the first optical line terminal to detect whether the link between the network management system and the first optical line terminal fails. If the network management system does not receive the heartbeat message sent by the first optical line terminal within a preset period of time, it is determined that the link between the network management system and the first optical line terminal may fail. In other embodiments, the network management system may send a ping command to the first optical line terminal, for example, the network management system may send an Internet Control Message Protocol (ICMP) request message to the first optical line terminal, and does not receive a response message sent by the first optical line terminal, then it is determined that the link between the network management system and the first optical line terminal may fail.

[0116] Due to a link failure between the first optical line terminal and the network management system, the network management system cannot manage the first optical line terminal, for example, the network management system cannot send a first management message to the first optical line terminal, then the network management system sends the first management message to the second optical line terminal, and the first management message is forwarded by the second optical line terminal, so that the first optical line terminal receives the first management message sent by the network management system.

[0117] In some embodiments, the network management system encapsulates the first management message in a second management message sent to the second optical line terminal. The network management system sends the second management message to the second optical line terminal. For example, the network management system 510 sends the second management message to the OLT network element 2 through the network device 520, and the second management message includes the first management message. Understandably, the second management message can be a proxy message. The second optical line terminal can forward the first management message sent by the network management system to the first optical line terminal as a proxy network element.

[0118] For example, Figure 8 As shown, the first management message is located in the payload field of the second management message. The header of the second management message includes a source address, a destination address, and an agent identifier. The source address is used to indicate the address of the network management system. The destination address is used to indicate the management address of the second optical line terminal. The management address of the second optical line terminal is used for the second optical line terminal to communicate with the network management system. The agent identifier is used to indicate that the second management message is a proxy message. The agent identifier can be located in the payload field or in the header of the second management message. Figure 8 As shown, the proxy identifier may be located in the header of the second management message.

[0119] The payload field of the first management message also includes a management identifier, which is used to instruct the first optical line terminal to execute a management operation of the network management system on the first optical line terminal.

[0120] The source address included in the first management message is used to indicate the address of the network management system, and the destination address included in the first management message is used to indicate the management address of the first optical line terminal. The management address of the first optical line terminal is used for the first optical line terminal to communicate with the network management system.

[0121] Correspondingly, the second optical line terminal receives the first management message. The second optical line terminal can receive the first management message sent by the network management system through the optical fiber connected to the network management system.

[0122] In some embodiments, the second optical line terminal receives a second management message sent by the network management system. The second management message includes the first management message. The explanation of the first management message and the second management message is as described in step 710 above.

[0123] Optionally, the first optical line terminal and the second optical line terminal can transmit messages to the network management system based on the Simple Network Management Protocol (SNMP) or the NETCONF protocol. The format of the management message can be the Management Information Base (MIB) format or the yang format.

[0124] Step 720: The second optical line terminal sends a first management message to the first optical line terminal.

[0125] The second optical line terminal receives the second management message, parses the second management message, and obtains the first management message. Since the source address in the header of the first management message indicates the address of the network management system, and the destination address indicates the management address of the first optical line terminal, it means that the first management message is a message sent by the network management system to the first optical line terminal, and the second optical line terminal forwards the first management message to the first optical line terminal.

[0126] Optionally, the second optical line terminal parses the second management message, obtains the proxy identifier, determines that the second management message is a proxy message, and forwards the first management message to the first optical line terminal.

[0127] In some embodiments, since the second optical line terminal has established a connection with the first optical line terminal, the second optical line terminal may encapsulate the first management message in the first message sent to the first optical line terminal. The second optical line terminal sends the first message to the first optical line terminal, and the first message includes the first management message. The second optical line terminal may check the local routing table to forward the first message to the first optical line terminal. The local routing table is used to indicate the corresponding relationship between the neighbor addresses of the two connected optical line terminals. For example, the second optical line terminal may check the local routing table to obtain that the neighbor address of the second optical line terminal has a corresponding relationship with the neighbor address of the first optical line terminal.

[0128] For example, Fig. 9 As shown, the first management message is located in the payload field of the first message. The header of the first message includes a source address and a destination address. The source address is used to indicate the neighbor address of the second optical line terminal, and the destination address is used to indicate the neighbor address of the first optical line terminal. The neighbor address of the first optical line terminal is used for the first optical line terminal to communicate with the second optical line terminal. The neighbor address of the second optical line terminal is used for the second optical line terminal to communicate with the first optical line terminal.

[0129] It can be understood that the neighbor address of the second optical line terminal and the neighbor address of the first optical line terminal may be addresses of a local area network established by the second optical line terminal and the first optical line terminal.

[0130] Correspondingly, the first optical line terminal receives the first management message sent by the second optical line terminal. The first management message is transmitted through the network cable connecting the second optical line terminal and the first optical line terminal, and the first optical line terminal receives the first management message sent by the second optical line terminal through the electrical port connected to the second optical line terminal. The first management message is transmitted through the optical fiber connecting the second optical line terminal and the first optical line terminal, and the first optical line terminal receives the first management message sent by the second optical line terminal through the optical port connected to the second optical line terminal.

[0131] In some embodiments, the first optical line terminal receives a first message sent by the second optical line terminal. The first message includes a first management message. The explanation of the first message is as described in step 720 above.

[0132] Step 730: The first optical line terminal executes the management operation of the network management system on the first optical line terminal according to the management identifier indicated by the first management message.

[0133] In some embodiments, the management identifier may be a numerical value, and the first optical line terminal performs a corresponding management operation according to the value of the management identifier.

[0134] For example, the management identifier indicates reset, and the first optical line terminal can reset and restart the optical module. For another example, the management identifier indicates reporting fault information, and the first optical line terminal reports the fault information to the network management system.

[0135] Step 740: The first optical line terminal sends a first management response message.

[0136] The first management response message is used to indicate the result of the management operation. For example, the result of the management operation indicates reset success or reset failure. For another example, the result of the management operation indicates fault information.

[0137] In some embodiments, the first optical line terminal may encapsulate the first management response message in a second message sent to the second optical line terminal. The first optical line terminal sends the second message to the second optical line terminal, and the second message includes the first management response message. The first optical line terminal may check the local routing table to obtain that the neighbor address of the second optical line terminal has a corresponding relationship with the neighbor address of the first optical line terminal, and forward the second message to the second optical line terminal based on the corresponding relationship.

[0138] The first management response message is located in the payload field of the second message. The header of the second message includes a source address and a destination address. The source address is used to indicate the neighbor address of the first optical line terminal, and the destination address is used to indicate the neighbor address of the second optical line terminal.

[0139] The source address included in the first management response message is used to indicate the management address of the first optical line terminal, and the destination address included in the first management response message is used to indicate the address of the network management system.

[0140] Optionally, the second message may further include a proxy identifier, where the proxy identifier is used to indicate that the second message is a proxy message.

[0141] Correspondingly, the second optical line terminal receives the first management response message sent by the first optical line terminal. The first management response message is transmitted through the network cable connecting the second optical line terminal and the first optical line terminal, and the second optical line terminal receives the first management response message sent by the first optical line terminal through the electrical port connected to the first optical line terminal. The first management response message is transmitted through the optical fiber connected to the second optical line terminal and the first optical line terminal, and the second optical line terminal receives the first management response message sent by the first optical line terminal through the optical port connected to the first optical line terminal.

[0142] In some embodiments, the second optical line terminal receives a second message sent by the first optical line terminal, and the second message includes the first management response message. The explanation of the second message is as described in step 740 above.

[0143] Optionally, the first optical line terminal may also send the first management response message through other optical line terminals. For example, the first optical line terminal is connected to the third optical line terminal, the first optical line terminal sends the first management response message to the third optical line terminal, and the first management response message is forwarded to the network management system through the third optical line terminal.

[0144] Step 750: The second optical line terminal sends a first management response message to the network management system.

[0145] The second optical line terminal receives the second message, parses the second message, and obtains the first management response message. Since the source address in the header of the first management response message indicates the management address of the first optical line terminal, and the destination address indicates the address of the network management system, it means that the first management response message is a message sent by the first optical line terminal to the network management system, and the second optical line terminal forwards the first management response message to the network management system.

[0146] Optionally, the second optical line terminal parses the second message, obtains the proxy identifier, determines that the second message is a proxy message, and forwards the first management response message to the network management system.

[0147] In some embodiments, the second optical line terminal encapsulates the first management response message into a second management response message sent to the network management system. The second optical line terminal sends the second management response message to the network management system, and the second management response message includes the first management response message.

[0148] The first management response message is located in the payload field of the second management response message. The header of the second management response message includes a source address and a destination address. The source address is used to indicate the management address of the second optical line terminal, and the destination address is used to indicate the address of the network management system. The management address of the second optical line terminal is used for the second optical line terminal to communicate with the network management system.

[0149] Correspondingly, the network management system receives the first management response message. The network management system receives the first management response message sent by the second optical line terminal.

[0150] In some embodiments, the network management system receives a second management response message sent by the second optical line terminal. The second management response message includes the first management response message. The explanation of the first management response message and the second management response message is as described in step 740 and step 750 above.

[0151] It should be noted that, when the network management system detects that the link failure between the first optical line terminal and the network management system is restored, the network management system manages the first optical line terminal based on the link between the network management system and the first optical line terminal.

[0152] In this way, the out-of-management optical line terminal is used as the target optical line terminal, and the optical line terminal connected to the out-of-management optical line terminal is used as the proxy network element. The management message sent by the network management system to the target optical line terminal is forwarded by the proxy optical line terminal. In the case of a link failure between the target optical line terminal and the network management system, the network management system can manage the target optical line terminal in time, and the target optical line terminal is not out of management, thereby improving the reliability of the network management system's management of the network element.

[0153] It is understandable that, in order to implement the functions in the above-mentioned embodiments, the optical line terminal includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0154] Combined with the above Figures 1 to 9 , describes in detail the network element management method provided by this embodiment, and will now be combined with Fig.10 , describes the network element management device provided according to this embodiment.

[0155] Fig.10 Schematic diagram of the structure of a network element management device provided in this embodiment. These network element management devices can be used to implement the functions of the optical line terminal in the above method embodiment, so as to achieve the beneficial effects of the above method embodiment. In this embodiment, the network element management device can be as follows Figure 5 The optical line terminal shown may also be a module (such as a chip) applied to an optical line terminal.

[0156] like Fig.10 As shown, the network element management device 1000 includes a communication module 1010, a processing module 1020 and a storage module 1030. The network element management device 1000 is used to implement the above Figure 7 The function of the first optical line terminal in the method embodiment shown in FIG.

[0157] The communication module 1010 is used to receive a first management message sent by the second optical line terminal.

[0158] The processing module 1020 is configured to execute a management operation of the network management system on the first optical line terminal according to the management identifier indicated by the first management message. Figure 7 Step 730.

[0159] The communication module 1010 is also used to send a first management response message, where the first management response message is used to indicate the result of the management operation. Figure 7 Step 740.

[0160] The network element management device 1000 is used to implement the above Figure 7 The function of the second optical line terminal in the method embodiment shown in FIG.

[0161] The communication module 1010 is used to receive a first management message sent by a network management system, where the first management message is used to instruct the network management system to perform a management operation on the first optical line terminal.

[0162] The processing module 1020 is used to parse the second management message sent by the network management system to obtain the first management message.

[0163] The communication module 1010 is also used to send a first management message to the first optical line terminal. Figure 7 Step 720.

[0164] The communication module 1010 is also used to send a first management response message to the network management system. Figure 7 Step 750.

[0165] The storage module 1030 is used to store neighbor addresses of the first optical line terminal and the second optical line terminal, so as to facilitate message forwarding between the first optical line terminal and the second optical line terminal.

[0166] It should be understood that the network element management device 1000 of the embodiment of the present application can be implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), and the above PLD can be a complex programmable logical device (CPLD), a field programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof. It can also be implemented by software Figure 7 When the forwarding management message is shown, its various modules may also be software modules, and the network element management device 1000 and its various modules may also be software modules.

[0167] The network element management device 1000 according to the embodiment of the present application may correspond to executing the method described in the embodiment of the present application, and the above and other operations and / or functions of each unit in the network element management device 1000 are respectively to implement Figure 7 For the sake of brevity, the corresponding processes of each method in are not repeated here.

[0168] See also Fig.11 , Fig.11 This is a schematic diagram of the structure of an optical line terminal provided by this application. Fig.11 As shown, the optical line terminal 1100 mainly includes the following parts: a processor 1101 , a memory 1102 , an optical module 1103 and a power management module 1104 .

[0169] The power management module 1104 is used to provide a stable current for the optical line terminal 1100 .

[0170] The optical module 1103 is used to connect optical fibers so that the optical line terminal 1100 can communicate with other devices, such as network-side devices, other optical line terminals, and user-end devices.

[0171] Optionally, the optical line terminal 1100 may also be configured with a first PON interface and a second PON interface. The first PON interface is used for optical communication between the optical line terminal 1100 and an upper layer device (other optical line terminals at the upper layer), and the second PON interface is used for optical communication between the optical line terminal 1100 and a user terminal device. Among them, the first PON interface and the second PON interface are ports connected using PON technology, and the first PON interface may include at least one of the following: a GPON interface, an EPON interface, a symmetrical 10G GPON interface, an asymmetrical 10G GPON interface, a 10G EPON interface, a TWDM PON interface, or a PON interface with a higher working rate that will appear in the future, and the second PON interface may include at least one of the following: a GPON interface, an EPON interface, a symmetrical 10G GPON interface, an asymmetrical 10G GPON interface, a 10G EPON interface, a TWDM PON interface, or a PON interface with a higher working rate that will appear in the future.

[0172] In the present application, the first PON interface and the second PON interface may be PON interfaces of different types or PON interfaces of the same type.

[0173] Optionally, the optical line terminal 1100 may also be configured with an Ethernet interface, which is an interface that uses the Ethernet protocol for communication and can be used for the optical line terminal 1100 to communicate with upper-layer network-side devices (switches, routers, etc.).

[0174] The memory 1102 is coupled to the processor 1101 and is used to store various software programs and / or multiple sets of instructions. Specifically, the memory 1102 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more disk storage devices, flash memory devices or other non-volatile solid-state storage devices. The memory 1102 may store an operating system (hereinafter referred to as system), such as ANDROID, IOS, WINDOWS, or LINUX and other embedded operating systems. The memory 1102 may also store neighbor addresses between multiple optical line terminals.

[0175] The processor 1101 may be used to read and execute computer-readable instructions, complete the management function of the optical line terminal 1100, interpret, control or process the message received by the optical line terminal 1100, etc. Specifically, the processor 1101 may be used to call a program stored in the memory 1102 and execute instructions included in the program, which may be used to implement the signal transmission function of the optical line terminal 1100 in the PON communication network.

[0176] It is understandable that the optical line terminal 1100 may also include an uplink board, a backplane providing physical connections for various units, a clock, a fan, a fan control module, etc., which will not be described in detail here.

[0177] Need to explain, Fig.11 The optical line terminal 1100 shown is only one implementation of the present application. In practical applications, the optical line terminal 1100 may also include more or fewer components, which is not limited here.

[0178] from Fig.11 According to the structure shown, when the optical line terminal 1100 is connected to the upper layer device, it can be connected to the device supporting the downstream PON (such as the traditional optical line terminal) through the first PON interface, and can also be connected to the network side devices such as switches and routers through the traditional Ethernet interface.

[0179] The method steps in this embodiment can be implemented by hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, which can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, mobile hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a computing device. Of course, the processor and the storage medium can also exist in a computing device as discrete components.

[0180] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device. The computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instruction may be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, for example, a floppy disk, a hard disk, a tape; it may also be an optical medium, for example, a digital video disc (DVD); it may also be a semiconductor medium, for example, a solid state drive (SSD). The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A network element management method, characterized in that: The method is applied to a communication network, the communication network includes a network management system and a plurality of optical line terminals, the plurality of optical line terminals are connected to each other, the plurality of optical line terminals include a first optical line terminal and a second optical line terminal, the method is performed by the first optical line terminal, and the method includes: When a link between the first optical line terminal and the network management system fails, receiving a first management message sent by the second optical line terminal; The management operation of the network management system on the first optical line terminal is performed according to the management identifier indicated by the first management message.

2. The method according to claim 1, characterized in that Receiving a first management message sent by the second optical line terminal includes: receiving a first message sent by the second optical line terminal, wherein the first message includes the first management message; Wherein, the first management message is located in the payload field of the first message; The header of the first message includes a source address and a destination address, the source address is used to indicate the neighbor address of the second optical line terminal, the destination address is used to indicate the neighbor address of the first optical line terminal, and the neighbor address of the first optical line terminal and the neighbor address of the second optical line terminal are used for communication between the first optical line terminal and the second optical line terminal.

3. The method according to claim 1 or 2, characterized in that: The method further comprises: A first management response message is sent, where the first management response message is used to indicate a result of the management operation.

4. The method according to claim 3, characterized in that Sending a first management response message, including: Sending a second message to the second optical line terminal, where the second message includes the first management response message; Wherein, the first management response message is located in the payload field of the second message; The header of the second message includes a source address and a destination address, the source address is used to indicate a neighbor address of the first optical line terminal, and the destination address is used to indicate a neighbor address of the second optical line terminal.

5. A network element management method, characterized in that: The method is applied to a communication network, the communication network includes a network management system and a plurality of optical line terminals, the plurality of optical line terminals are connected to each other, the plurality of optical line terminals include a first optical line terminal and a second optical line terminal, the method is performed by the second optical line terminal, and the method includes: When a link between the first optical line terminal and the network management system fails, receiving a first management message sent by the network management system, wherein the first management message is used to instruct the network management system to perform a management operation on the first optical line terminal; Sending the first management message to the first optical line terminal.

6. The method according to claim 5, characterized in that Receiving a first management message sent by the network management system includes: receiving a second management message sent by the network management system, where the second management message includes the first management message; Wherein, the first management message is located in the payload field of the second management message; The header of the second management message includes a source address, a destination address and a proxy identifier, the source address is used to indicate the address of the network management system, the destination address is used to indicate the management address of the second optical line terminal, the management address of the second optical line terminal is used for the second optical line terminal to communicate with the network management system, and the proxy identifier is used to indicate that the second management message is a proxy message.

7. The method according to claim 5 or 6, characterized in that: Sending the first management message to the first optical line terminal includes: Sending a first message to the first optical line terminal, where the first message includes the first management message; Wherein, the first management message is located in the payload field of the first message; The header of the first message includes a source address and a destination address, the source address is used to indicate the neighbor address of the second optical line terminal, the destination address is used to indicate the neighbor address of the first optical line terminal, and the neighbor address of the first optical line terminal and the neighbor address of the second optical line terminal are used for communication between the first optical line terminal and the second optical line terminal.

8. The method according to claim 5, characterized in that The method further comprises: A first management response message sent by the first optical line terminal is received, where the first management response message is used to indicate a result of the management operation.

9. The method according to claim 8, characterized in that Receiving a first management response message sent by the first optical line terminal includes: receiving a second message sent by the first optical line terminal, where the second message includes the first management response message; Wherein, the first management response message is located in the payload field of the second message; The header of the second message includes a source address and a destination address, the source address is used to indicate a neighbor address of the first optical line terminal, and the destination address is used to indicate a neighbor address of the second optical line terminal.

10. The method according to claim 8 or 9, characterized in that: The method further comprises: a second management response message sent to the network management system, wherein the second management response message includes the first management response message; Wherein, the first management response message is located in the payload field of the second management response message; The header of the second management response message includes a source address and a destination address, the source address is used to indicate the management address of the second optical line terminal, and the destination address is used to indicate the address of the network management system.

11. A communication network, characterized in that: The communication network includes a network management system, a first optical line terminal and a second optical line terminal, wherein the first optical line terminal and the second optical line terminal are connected; when a link failure occurs between the first optical line terminal and the network management system, The second optical line terminal is used to receive a first management message sent by the network management system, where the first management message is used to instruct the network management system to perform a management operation on the first optical line terminal; The first optical line terminal is used to receive the first management message sent by the second optical line terminal; The first optical line terminal is further configured to execute a management operation of the network management system on the first optical line terminal according to the management identifier indicated by the first management message; The second optical line terminal is further used to receive a first management response message sent by the first optical line terminal, where the first management response message is used to indicate a result of the management operation; The second optical line terminal is further used to send the first management response message to the network management system.

12. The communication network according to claim 11, characterized in that When the second optical line terminal receives the first management message sent by the network management system, it is specifically used to: receiving a second management message sent by the network management system, where the second management message includes the first management message; Wherein, the first management message is located in the payload field of the second management message; The header of the second management message includes a source address, a destination address and a proxy identifier, the source address is used to indicate the address of the network management system, the destination address is used to indicate the management address of the second optical line terminal, the management address of the second optical line terminal is used for the second optical line terminal to communicate with the network management system, and the proxy identifier is used to indicate that the second management message is a proxy message.

13. The communication network according to claim 11 or 12, characterized in that: When the first optical line terminal receives the first management message sent by the second optical line terminal, it is specifically used to: receiving a first message sent by the second optical line terminal, wherein the first message includes the first management message; Wherein, the first management message is located in the payload field of the first message; The header of the first message includes a source address and a destination address, the source address is used to indicate the neighbor address of the second optical line terminal, the destination address is used to indicate the neighbor address of the first optical line terminal, and the neighbor address of the first optical line terminal and the neighbor address of the second optical line terminal are used for communication between the first optical line terminal and the second optical line terminal.

14. The communication network according to any one of claims 11 to 13, characterized in that: When the second optical line terminal receives the first management response message sent by the first optical line terminal, it is specifically used to: receiving a second message sent by the first optical line terminal, where the second message includes the first management response message; Wherein, the first management response message is located in the payload field of the second message; The header of the second message includes a source address and a destination address, the source address is used to indicate a neighbor address of the first optical line terminal, and the destination address is used to indicate a neighbor address of the second optical line terminal.

15. The communication network according to any one of claims 11 to 14, characterized in that: When the second optical line terminal sends the first management response message to the network management system, it is specifically used to: a second management response message sent to the network management system, wherein the second management response message includes the first management response message; Wherein, the first management response message is located in the payload field of the second management response message; The header of the second management response message includes a source address and a destination address, the source address is used to indicate the management address of the second optical line terminal, and the destination address is used to indicate the address of the network management system.

16. An optical line terminal, characterized in that: The optical line terminal includes an optical module, a memory and a processor, wherein the memory is used to store a set of computer instructions; the optical module is used to receive or send data, and when the processor executes the set of computer instructions, the operation steps of the method described in any one of claims 1 to 10 are performed.

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