CN112866834B

CN112866834B - Optical network unit and processing method and system for long light-emitting fault thereof

Info

Publication number: CN112866834B
Application number: CN201911189194.3A
Authority: CN
Inventors: 金嘉亮; 张德智; 张东
Original assignee: China Telecom Corp Ltd
Current assignee: China Telecom Corp Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2023-02-03
Anticipated expiration: 2039-11-28
Also published as: CN112866834A

Abstract

The disclosure provides an optical network unit and a method and a system for processing a long light-emitting fault thereof, and relates to the field of passive optical fiber access networks. In the present disclosure, any ONU determines whether all ONUs have an uplink failure based on the total number of all ONUs in the network obtained by the obtaining, and if the determination result is yes, obtains an optical power detection value of all ONUs when its own transmitter is turned off, and locates an ONU having a long light emission failure using the optical power detection value. The method can locate the ONU with the long light-emitting fault by reading the broadcast message record stored by any ONU, realizes the rapid location and processing of the fault, and meets the availability requirement and fault recovery speed requirement of the PON system in the industrial field.

Description

Optical network unit and processing method and system for long light-emitting fault thereof

Technical Field

The present disclosure relates to the field of passive optical access networks, and in particular, to an optical network unit and a method and a system for processing a long light-emitting fault thereof.

Background

With the transformation and upgrade of manufacturing industry, industrial networking and intellectualization gradually become an evolution trend. In an industrial manufacturing enterprise, network connection between manufacturing equipment in a production workshop and an upper-layer manufacturing management system is realized through a Passive Optical Network (PON), and the advantages of low deployment cost, high bandwidth, mature industrial chain and the like of the Passive Optical Network can be fully utilized to meet the information and intelligent requirements of the traditional manufacturing enterprise. In an industrial manufacturing scenario, the availability of a network system is a key technical index, and compared with a traditional public access network, once an industrial network fails, the network system needs to perform fault location and removal at a higher speed, otherwise, a large amount of economic loss is generated.

In a passive Optical Network PON system, an Optical Line Terminal (OLT) and an Optical Network Unit (ONU) are in a point-to-multipoint Network topology, where the OLT is a Terminal device for connecting an Optical fiber trunk. The ONU adopts a time division multiplexing technology in an uplink, each ONU needs to carry out data transmission strictly according to an uplink time slot allocated by the OLT, otherwise, uplink data collision among the ONUs can be caused, and uplink data packet loss or network interruption can be caused. If the upstream optical transmitter of an ONU fails, a long light-emitting problem may be caused (i.e. the transmitter is normally on), which may occupy the upstream transmission timeslots of all other ONUs, resulting in interruption of the upstream data of all ONUs and making the network unusable.

In some related technologies, to solve the problem that the OLT and the upper network management system cannot perform fault location and troubleshooting on the long-emitting ONU due to the uplink interruption between the OLT and the ONU, an operation and maintenance person is usually required to go to the site to manually test and troubleshoot all the ONUs one by one.

Disclosure of Invention

The inventor finds that, in the related art, the method for manually testing and troubleshooting all the optical network units ONU one by the operation and maintenance personnel going to the workshop site is low in efficiency, extremely long in time consumption and incapable of meeting the requirements on the availability and the fault recovery speed of the network system in the industrial manufacturing scene.

In the disclosure, any ONU determines whether uplink faults occur in all ONUs based on the obtained total number of all ONUs in the network, and if yes, obtains optical power detection values of all ONUs when transmitters of all ONUs are turned off, and positions the ONU with the long light-emitting fault by using the optical power detection values, so that the ONU with the long light-emitting fault can be positioned as long as the broadcast message record stored in any ONU is read, thereby realizing quick positioning and processing of faults, and meeting the requirements of the industrial field on availability and fault recovery speed of the PON system.

Some embodiments of the present disclosure provide a method for processing a long light-emitting fault of an optical network unit, where all optical network units ONUs under a single passive optical network PON port of an optical line terminal OLT form a network, and the processing method executed by any one ONU includes:

acquiring the total number of all ONU in the network;

based on the total number, judging whether all ONUs have uplink faults;

if the judgment result is yes, acquiring optical power detection values of all the ONUs when the transmitters of the ONUs are turned off;

and based on the optical power detection value of each ONU, positioning the ONU with the long light-emitting fault.

In some embodiments, obtaining the total number of all ONUs in the network comprises: and counting the total number of all the ONUs in the network according to the heartbeat message periodically broadcast by each ONU in the network.

In some embodiments, the broadcast message sent by each ONU carries the identification information of the ONU.

In some embodiments, determining whether all ONUs have uplink failures includes: and if all the ONUs send the uplink fault message, judging that all the ONUs have the uplink fault.

In some embodiments, obtaining optical power detection values for all ONUs when their own transmitters are off comprises: the optical power detection value of the ONU is detected when the transmitter of the ONU is turned off, and the detection message which is sent by other ONUs and contains the optical power detection value when the transmitter of the ONU is turned off is received.

In some embodiments, locating an ONU that has a long light failure comprises: and if the optical power detection value of one ONU shows that the transmitter of the ONU cannot be closed or the optical power of the ONU when the transmitter of the ONU is closed is not in a preset tolerance range close to zero, judging that the ONU is the ONU with the long light-emitting fault.

In some embodiments, each ONU broadcasts an alarm that the optical power is not zero when its own transmitter cannot be turned off or when the optical power when its own transmitter is turned off is not within a preset tolerance range close to zero.

In some embodiments, all ONUs under a single PON port of the OLT build a bus-type network based on the power line network.

In some embodiments, further comprising: an ONU with a long light failure attempts to turn off its own transmitter.

In some embodiments, further comprising: and if the ONU with the long light-emitting fault cannot close the transmitter of the ONU, the operation and maintenance personnel is prompted to process the ONU.

Some embodiments of the present disclosure provide an optical network unit, where all optical network units ONU under a single passive optical network PON port of an optical line terminal OLT include the optical network unit to form a network, including:

the communication module is configured to broadcast heartbeat messages of the communication module, uplink fault messages and optical power detection values when the transmitter is closed based on the established network, and receive heartbeat messages, uplink fault messages and optical power detection values when the transmitter is closed broadcast by other ONUs;

the data storage module is configured to store heartbeat messages, uplink fault messages and optical power detection values of all the ONUs when the transmitter is turned off;

a detection module configured to control turning off its own transmitter, and detect an optical power detection value at the time when its own transmitter is turned off;

the positioning module is configured to count the total number of all the ONUs in the network according to the heartbeat message periodically broadcast by each ONU in the network; judging whether all ONUs have uplink faults or not based on the total number and the received uplink fault message; if the judgment result is yes, controlling to execute the detection module and receiving optical power detection values of other ONUs when the own transmitter is closed; and based on the optical power detection value of each ONU, positioning the ONU with the long light-emitting fault.

Still other embodiments of the present disclosure provide an optical network unit, including: a memory; and a processor coupled to the memory, the processor configured to execute the method for handling long light faults according to any one of the embodiments based on instructions stored in the memory.

Some embodiments of the present disclosure provide a system for processing a long light emitting fault of an optical network unit, including: all the optical network units ONU belonging to a single passive optical network PON port of the optical line terminal OLT, all the ONUs forming a network, wherein any one of the ONUs is configured to execute the method for processing the long light-emitting fault according to any one of the embodiments.

Some embodiments of the present disclosure propose a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of handling long light emission failures described in any of the embodiments.

Drawings

The drawings that will be used in the description of the embodiments or the related art will be briefly described below. The present disclosure will be more clearly understood from the following detailed description, which proceeds with reference to the accompanying drawings,

it is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without undue inventive faculty.

Fig. 1 shows an architectural schematic of a PON system according to some exemplary embodiments of the present disclosure.

Fig. 2 illustrates an architectural diagram of a PON system in combination with a power line network according to some exemplary embodiments of the present disclosure.

Fig. 3 illustrates a flowchart of an ONU long optical emission failure handling method according to some exemplary embodiments of the present disclosure.

Fig. 4 shows a flowchart of an ONU long emission failure handling method according to further exemplary embodiments of the present disclosure.

Figure 5 shows a schematic diagram of an optical network unit according to some example embodiments of the present disclosure.

Figure 6 shows a schematic diagram of an optical network unit according to further exemplary embodiments of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure.

The PON system shown in fig. 1 includes an OLT, which corresponds to a plurality of ONUs (three are exemplarily shown), which are respectively labeled as ONU1, ONU2, and ONU3, and an optical splitter, wherein the optical splitter is used for separating out a required resonance absorption line.

In the PON system, because a point-to-multipoint network topology structure is formed between the OLT and the ONUs, the ONUs use a time division multiplexing technique in an uplink direction, and each ONU needs to transmit data strictly according to an uplink time slot allocated by the OLT, otherwise, uplink data collision between the ONUs is caused, which results in uplink data packet loss or network interruption. If the transmitter of the ONU1 fails, a problem of long light emission may be caused, that is, the transmitter is normally on and occupies the upstream transmission timeslots of all ONUs (that is, the ONU1, the ONU2, and the ONU 3), so that the upstream data of all ONUs are interrupted, and the network is not available. In this case, the uplink between the OLT and the ONU is interrupted, and the OLT and the upper network management system cannot perform fault location and processing on the long-emitting ONU.

In order to realize the processing of the long-time light-emitting fault of the ONU, all the ONUs under the single PON port of the OLT need to establish a bus network based on a power line network, so that the ad hoc network of the ONUs under the same PON port is realized.

Fig. 2 illustrates an architectural diagram of a PON system in combination with a power line network according to some exemplary embodiments of the present disclosure. As shown in fig. 2, each ONU forms an ad hoc network communication channel between ONUs through a power line network (referred to as a power line carrier communication network). When a network fault occurs in the PON system, each ONU receives heartbeat messages and alarm messages from other ONUs, and implements ONU long-emission fault detection and fault location by executing a message processing and determining mechanism and an ONU long-emission fault troubleshooting process in any subsequent embodiment of the present disclosure. The power line carrier communication is a technology for performing data communication by using a power line for supplying power to a communication device as a transmission medium. In a factory workshop, all ONU equipment in the same workshop is in the same power line power supply range, and meanwhile, the range generally does not cross over an air switch in a power network, so that the problem that data transmission is blocked by the air switch does not exist, therefore, power line carrier communication can be effectively combined with a PON system, and other required functions are realized in an auxiliary manner.

Fig. 3 illustrates a flow diagram of a long light fault handling method according to some exemplary embodiments of the present disclosure. Each step of this embodiment may be performed by any ONU in an ad hoc network formed by each ONU.

As shown in FIG. 3, the method of this embodiment includes steps 301-304.

In step 301, the total number of all ONUs in the network is obtained.

An exemplary method for acquiring the total number of all ONUs in the network is to count the total number of all ONUs in the network according to a heartbeat message periodically broadcast by each ONU in the network, where a broadcast message sent by each ONU carries identification information of the ONU.

In step 302, it is determined whether all ONUs have an uplink failure based on the total number of ONUs in the network.

And judging whether all the ONUs have uplink faults or not based on the total number of the ONUs in the network, namely judging whether all the ONUs send uplink fault messages or not, and if so, judging that all the ONUs have uplink faults.

In step 303, in the case where the determination result is yes, the optical power detection values of all ONUs at the time when their own transmitters are turned off are acquired.

And if the judgment result is yes, acquiring the optical power detection values of all the ONUs when the own transmitters are turned off, namely detecting the optical power detection value of the ONU when the own transmitter is turned off, and receiving detection messages which are sent by other ONUs and contain the optical power detection value when the own transmitter is turned off. When the transmitter of each ONU cannot be turned off or the optical power of the ONU when the transmitter of the ONU is turned off is not within a preset tolerance range close to zero, the ONU broadcasts an alarm that the optical power is not zero.

In step 304, the ONU having a long light emission failure is located based on the optical power detection values of the respective ONUs.

An exemplary method for locating an ONU with a long light emission fault based on an optical power detection value of the ONU is to determine that the ONU is the ONU with the long light emission fault if the optical power detection value of one ONU indicates that the transmitter of the ONU cannot be turned off, or the optical power of the ONU when the transmitter of the ONU is turned off is not within a preset tolerance range close to zero.

And finally, after the ONU with the long light-emitting fault is positioned, the ONU with the long light-emitting fault tries to close the transmitter thereof, if the ONU with the long light-emitting fault cannot close the transmitter thereof, the operation and maintenance personnel are prompted to process, and if the ONU with the long light-emitting fault can close the transmitter thereof, the fault is solved. The long light-emitting fault processing method realizes quick positioning and processing of faults and meets the requirements of the industrial field on the availability and the fault recovery speed of the PON system.

Fig. 4 shows a flow diagram of a long light fault handling method according to further exemplary embodiments of the present disclosure.

As shown in fig. 4, the method of this embodiment includes steps 401-404, wherein step 403 includes five sub-steps 403a, 403b, 403c, 403d, and 403 e.

In step 401, all ONUs form a bus-type network over the power line network.

All the ONUs form a bus type network through a power line network, namely all the ONUs under a single PON port are subjected to bus type network networking through the power line network.

In step 402, each ONU periodically broadcasts heartbeat information with its own identification information.

Each ONU broadcasts heartbeat information with the identification information of the ONU by a power line network regularly, so that each ONU can acquire the total number of the ONUs of the network by counting the heartbeat information broadcast by other ONUs, the heartbeat information comprises a message type and the identification information of the ONU, and the message format is as follows:

in step 403, a long optical fault occurs in a certain ONU.

When a certain ONU fails, the ONU becomes a long-light-emitting ONU, and communication between all the ONUs and the OLT is interrupted. Next, substeps 403a to 403e are performed

In sub-step 403a, each ONU broadcasts a transmit uplink failure message.

When detecting and finding the uplink fault, each ONU sends a broadcast message of the uplink fault to other ONUs through the power line network, where the message includes ONU identification information of the ONU, and the message format is, for example:

in sub-step 403b, each ONU receives the uplink failure warning messages of all other ONUs.

According to the total number of the ONUs counted in the step 402, if each ONU can receive the fault alarm message of other ONUs, it is determined that a long-emitting ONU is present in the network, and the subsequent steps are triggered.

In sub-step 403c, according to the size sequence of the identification information of the ONUs, each ONU sequentially turns off its own transmitter and detects the optical power (hereinafter referred to as optical power) when the transmitter is turned off, and performs broadcasting.

According to the size sequence of the ONU identification information, each ONU sequentially cuts off the power supply of the self transmitter and detects the optical power of the transmitter at the moment, if the power supply is within the preset measurement tolerance close to zero, the ONU identification information of the ONU and the optical power value at the moment are broadcasted through the power line network, and the message format is as follows:

in sub-step 403d, each ONU determines whether it cannot turn off the transmitter itself or whether the optical power is not zero.

If a certain ONU finds that the power supply of a transmitter cannot be turned off or the detection result of the optical power is not within the preset measurement tolerance close to zero, the ONU identification information and the alarm of which the optical power is not zero are broadcasted through the power line network, and the message format is as follows:

in sub-step 403e, the ONU with the long optical fault is located.

Each ONU locates the ONU identification information generating the ONU with the luminous fault through the turn-off and detection messages and the alarm contents of other ONUs, the ONU sending the alarm with the optical power not being zero in the power line network is the fault ONU for the normal ONU, and the ONU can be judged to be the fault ONU when the optical power of the ONU is not zero for the fault ONU. If the long-light-emitting ONU can successfully keep the power supply of the transmitter of the long-light-emitting ONU closed at the moment, the network uplink service of the whole PON system is recovered to be normal, if the long-light-emitting ONU cannot control the transmitter of the long-light-emitting ONU to be closed, the long-light-emitting ONU needs subsequent processing of operation and maintenance personnel and can send alarm information to prompt the operation and maintenance personnel to process the long-light-emitting ONU.

In step 404, the message data of any ONU is read, and ONU fault location and subsequent troubleshooting are realized.

And reading the message data result of any ONU, positioning the failed ONU, and directly closing the failed ONU to remove the failure so as to avoid traversing all ONUs for trying.

Fig. 5 shows a schematic diagram of an optical network unit according to an example embodiment of the present disclosure.

The optical network unit 500 shown in fig. 5 includes: a communication module 501, a data storage module 502, a detection module 503, and a location module 504.

A communication module 501 configured to broadcast a heartbeat message of itself, an uplink failure message, and an optical power detection value when the transmitter is turned off, and receive a heartbeat message, an uplink failure message, and an optical power detection value when the transmitter is turned off, which are broadcast by other ONUs, based on the network.

A data storage module 502 configured to store heartbeat messages, uplink failure messages, optical power detection values when the transmitter is turned off for all ONUs.

The detection module 503 is configured to control to turn off its own transmitter, and detect the optical power detection value when its own transmitter is turned off.

A positioning module 504 configured to count the total number of all ONUs in the network according to the heartbeat message periodically broadcast by each ONU in the network; judging whether all ONUs have uplink faults or not based on the total number and the received uplink fault messages; if the determination result is yes, controlling the execution detection module 503 and receiving the optical power detection values of other ONUs when their own transmitters are turned off; and based on the optical power detection value of each ONU, positioning the ONU with the long light-emitting fault.

Figure 6 shows a schematic diagram of an optical network unit according to another example embodiment of the present disclosure.

As shown in fig. 6, the optical network unit 600 of this embodiment includes: a memory 610 and a processor 620 coupled to the memory 610, the processor 620 being configured to execute the long light fault handling method in any of the foregoing embodiments based on instructions stored in the memory 610.

Memory 610 may include, for example, system memory, fixed non-volatile storage media, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), and other programs.

The optical network unit 600 may further include an input-output interface 630, a network interface 640, a storage interface 650, and the like. These

interfaces

630, 640, 650 and the connections between the memory 610 and the processor 620 may be, for example, via a bus 660. The input/output interface 630 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 640 provides a connection interface for various networking devices. The storage interface 650 provides a connection interface for external storage devices such as an SD card and a usb disk.

As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims

1. A processing method for long light-emitting fault of Optical Network Unit (ONU) is characterized in that all ONUs under a single passive optical fiber network (PON) port of an Optical Line Terminal (OLT) form a network, and the processing method executed by any one ONU comprises the following steps:

acquiring the total number of all ONU in the network;

based on the total number, judging whether all ONUs have uplink faults or not;

2. The method for handling long optical transmission failure of ONU according to claim 1, wherein obtaining the total number of all ONUs in the network comprises:

and counting the total number of all the ONUs in the network according to the heartbeat message periodically broadcast by each ONU in the network.

3. The method for handling long optical transmission failure of optical network unit according to claim 2,

and the broadcast message sent by each ONU carries the identification information of the ONU.

4. The method for handling long optical transmission failure of ONU according to claim 1, wherein determining whether all ONUs have uplink failure comprises:

and if all the ONUs send the uplink fault message, judging that all the ONUs have the uplink fault.

5. The method for handling long optical transmission failure of ONU according to claim 1, wherein obtaining the optical power detection values of all ONUs when their own transmitters are turned off comprises:

the optical power detection value of the ONU is detected when the transmitter of the ONU is turned off, and the detection message which is sent by other ONUs and contains the optical power detection value when the transmitter of the ONU is turned off is received.

6. The method for processing the long optical transmission fault of the ONU of claim 1, wherein the positioning the ONU with the long optical transmission fault comprises:

and if the optical power detection value of one ONU shows that the transmitter of the ONU cannot be closed or the optical power of the ONU when the transmitter of the ONU is closed is not in a preset tolerance range close to zero, judging that the ONU is the ONU with the long light-emitting fault.

7. The method for handling long optical transmission failure of ONU according to claim 5,

and each ONU broadcasts an alarm with the optical power not being zero when the transmitter of each ONU cannot be turned off or the optical power when the transmitter of each ONU is turned off is not within a preset tolerance range close to zero.

8. The method for handling long optical transmission failure of optical network unit according to claim 1,

all ONUs under a single PON port of the OLT establish a bus type network based on the power line network.

9. The method for processing the long light-emitting fault of the optical network unit according to claim 1, further comprising:

an ONU with a long light failure attempts to turn off its own transmitter.

10. The method for handling the long light-emitting failure of the onu according to claim 9, further comprising:

and if the ONU with the long light-emitting fault cannot close the transmitter of the ONU, the operation and maintenance personnel is prompted to process the ONU.

11. An optical network unit, characterized in that, a network is constructed by all optical network units ONU belonging to a single passive optical network PON port of an optical line terminal OLT and including the optical network unit, comprising:

the communication module is configured to broadcast heartbeat messages of the communication module, uplink fault messages and optical power detection values when the transmitter is turned off based on the established network, and receive heartbeat messages, uplink fault messages and optical power detection values when the transmitter is turned off broadcast by other ONUs;

12. An optical network unit comprising:

a memory; and a processor coupled to the memory, the processor configured to perform the method of handling long light faults of any one of claims 1-10 based on instructions stored in the memory.

13. A system for processing long light-emitting fault of optical network unit is characterized in that the system comprises:

all optical network units, ONUs, belonging to a single passive optical network, PON, port of an optical line termination, OLT, all ONUs constituting a network, any one of the ONUs being configured to perform the method for handling long luminous faults as claimed in any one of claims 1 to 10.

14. A non-transitory computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the method of handling long light faults of any one of claims 1-10.