CN114389979A

CN114389979A - Method, device and terminal for detecting registration abnormity of optical communication network

Info

Publication number: CN114389979A
Application number: CN202011139115.0A
Authority: CN
Inventors: 岳浩
Original assignee: Hisense Broadband Multimedia Technology Co Ltd
Current assignee: Hisense Broadband Multimedia Technology Co Ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2022-04-22

Abstract

The application belongs to the technical field of optical fiber communication, and relates to a method, a device and a terminal for detecting registration abnormity of an optical communication network. The embodiment of the application provides a method for detecting the registration abnormity of an optical communication network, which comprises the steps of obtaining the current registration state information; when the current registration state is a non-operation state, acquiring an interactive message generated in the registration process; searching preset registration failure reason information according to the interactive information; and outputting the registration failure reason information to the outside.

Description

Method, device and terminal for detecting registration abnormity of optical communication network

Technical Field

The present application relates to the field of optical fiber communications, and in particular, to a method, an apparatus, and a terminal for detecting a registration anomaly in an optical communication network.

Background

With the continuous push of fiber to the home, the intelligent gateway device in the GPON mode has more and more network access tests and the requirement of network access in the current network. In the existing network access process, the situation that the registration of the ONU to the OLT cannot be completed normally due to various PON interaction anomalies is often encountered. The reasons for the failure of normal registration are many, and strict judgment is needed, so that the problem is solved thoroughly. In the conventional solution, hardware devices such as an optical power meter and a diffraction graph instrument need to be used to measure and calibrate the single board again, but these requirements are difficult to implement in the current network environment.

Disclosure of Invention

The embodiment of the application provides a method, a device and a terminal for detecting registration abnormity of an optical communication network, and prompts the reason of the registration abnormity by analyzing the registration process.

In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions;

the method for detecting the registration abnormity of the optical communication network comprises the steps of obtaining current registration state information; when the current registration state is a non-operation state, acquiring an interactive message generated in the registration process; searching preset registration failure reason information according to the interactive information; and outputting the registration failure reason information to the outside.

The device for detecting the registration abnormity of the optical communication network comprises a registration state data acquisition module, a registration state data acquisition module and a registration state data acquisition module, wherein the registration state data acquisition module can be used for counting and storing the interaction information; a registration state data analysis module: analyzing the current registration state according to the interactive information, and analyzing whether the receiving and sending of the physical layer operation management and maintenance message are abnormal or not; the registration abnormal reason prompting module: and prompting the reason of the registration failure according to the result of the registration state data analysis module.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a connection relationship of an optical communication terminal;

fig. 2 is a flowchart of an optical communication network registration provided in an embodiment of the present application;

fig. 3 is a schematic diagram illustrating an analysis flow of a registration process according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In an optical communication network, two-party communication needs to be performed, for example, communication is performed between an optical network unit ONU and an optical line terminal OLT, and a many-to-one network topology structure is established between a plurality of optical network units and a single optical line terminal. At the beginning of network connection, the optical network unit needs to establish registration at the optical line terminal through communication with the optical line terminal, and after registration, normal data communication can be formed between the optical network unit and the optical line terminal.

One of the core links of optical fiber communication is the interconversion of optical and electrical signals. The optical fiber communication uses optical signals carrying information to transmit in information transmission equipment such as optical fibers/optical waveguides, and the information transmission with low cost and low loss can be realized by using the passive transmission characteristic of light in the optical fibers/optical waveguides; meanwhile, the information processing device such as a computer uses an electric signal, and in order to establish information connection between the information transmission device such as an optical fiber or an optical waveguide and the information processing device such as a computer, it is necessary to perform interconversion between the electric signal and the optical signal.

The optical module realizes the function of interconversion of optical signals and electrical signals in the technical field of optical fiber communication, and the interconversion of the optical signals and the electrical signals is the core function of the optical module. The optical module is electrically connected with an external upper computer through a golden finger on an internal circuit board of the optical module, and the main electrical connection comprises power supply, I2C signals, data signals, grounding and the like; the optical module realizes optical connection with external optical fibers through an optical interface, the external optical fibers are connected in various ways, and various optical fiber connector types are derived; the method is characterized in that the electric connection is realized by using a golden finger at an electric interface, which becomes the mainstream connection mode of the optical module industry, and on the basis, the definition of pins on the golden finger forms various industry protocols/specifications; the optical connection mode realized by adopting the optical interface and the optical fiber connector becomes the mainstream connection mode of the optical module industry, on the basis, the optical fiber connector also forms various industry standards, such as an LC interface, an SC interface, an MPO interface and the like, the optical interface of the optical module also makes adaptive structural design aiming at the optical fiber connector, and the optical fiber adapters arranged at the optical interface are various.

Fig. 1 is a schematic diagram of connection relationship of an optical communication terminal. As shown in fig. 1, the connection of the optical communication terminal mainly includes the interconnection among the optical network terminal 100, the optical module 200, the optical fiber 101 and the network cable 103;

one end of the optical fiber 101 is connected with a far-end server, one end of the network cable 103 is connected with local information processing equipment, and the connection between the local information processing equipment and the far-end server is completed by the connection between the optical fiber 101 and the network cable 103; and the connection between the optical fiber 101 and the network cable 103 is made by the optical network terminal 100 having the optical module 200.

An optical interface of the optical module 200 is externally accessed to the optical fiber 101, and establishes bidirectional optical signal connection with the optical fiber 101; the electrical interface of the optical module 200 is externally connected to the optical network terminal 100, and establishes a bidirectional electrical signal connection with the optical network terminal 100; bidirectional interconversion of optical signals and electric signals is realized inside the optical module, so that information connection is established between the optical fiber and the optical network terminal; specifically, the optical signal from the optical fiber 101 is converted into an electrical signal by the optical module and then input to the optical network terminal 100, and the electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module and input to the optical fiber 101.

The optical network terminal is provided with an optical module interface 102, which is used for accessing an optical module 200 and establishing bidirectional electric signal connection with the optical module 200; the optical network terminal has a network cable interface 104, which is used for accessing the network cable 103 and establishing a bidirectional electrical signal connection (generally, an electrical signal of an ethernet protocol, which is different from an electrical signal used by an optical module in protocol/type) with the network cable 103; the optical module 200 is connected to the network cable 103 through the optical network terminal 100, specifically, the optical network terminal transmits a signal from the optical module to the network cable and transmits the signal from the network cable to the optical module, and the optical network terminal serves as an upper computer of the optical module to monitor the operation of the optical module. The optical network terminal is an upper computer of the optical module, provides data signals for the optical module and receives the data signals from the optical module, and a bidirectional signal transmission channel is established between the remote server and the local information processing equipment through the optical fiber, the optical module, the optical network terminal and a network cable.

Common local information processing apparatuses include routers, home switches, electronic computers, and the like; common optical network terminals include an optical network unit ONU, an optical line terminal OLT, a data center server, a data center switch, and the like.

The reason why the ONU registers to the OLT is often abnormal is that the received/emitted light power of the optical module in each ONU device is calibrated to a rough range, which may cause a problem that the calibration does not reach the standard, or the hardware of the ONU device ages to cause abnormal received/emitted light power of the optical module along with the long-term use of the ONU device.

The registration process of the ONU is controlled by the OLT, and is completed by interacting the uplink and downlink marks and PLOAM messages. Monitoring and counting the receiving/sending frames of the PLOAM message in the interaction process within the set timer time, and analyzing the interaction information so as to judge whether the receiving/sending optical function of the optical module is normal, and the method can realize the detection of the abnormity in the registration process.

In order to realize the method, the optical network unit comprises a registration state data acquisition module, a registration state data analysis module and a registration abnormal reason prompt module, and the functions of the modules are as follows:

a registration state data acquisition module: after the function is started, the register state initiated by the ONU to the OLT and the receiving and sending information of the PLOAM message based on the current state are counted and stored in the set acquisition time.

A registration state data analysis module: and analyzing the current registration state according to data from the registration state data acquisition module, such as the acquired registration state and the information receiving and sending data of the PLOAM message, analyzing whether the receiving and sending of the PLOAM message in the current state are abnormal or not, and sending an analysis result to the registration abnormal reason prompting module.

The registration abnormal reason prompting module: and according to the result of the registration state data analysis module, such as whether the receiving and sending of PLOAM messages are abnormal or not, the registration state is fed back, whether the registration is abnormal or not is prompted, and the reason of the abnormality is prompted.

Fig. 2 is a flowchart of optical communication network registration provided in an embodiment of the present application. As shown in fig. 2, after the anomaly detection method provided in this embodiment of the present application is started, a registration state data acquisition module in an optical network unit starts acquisition of interaction information within a time set by a timer, where the interaction information includes Physical Layer Operation Administration and Maintenance (PLOAM) message transmission and reception between an OLT and an ONU, and a switching state of the ONU within the time.

After data acquisition is completed, the interactive information enters a registration state data analysis module, and switching change of the ONU state and received and sent PLOAM information are analyzed in the registration state data analysis module, so that whether the receiving and sending optical functions of the optical module are normal or not, whether the registration process is normal or not and which possible reasons for registration failure exist are judged. If the registration fails, the registration abnormal reason prompting module feeds back the abnormal reason according to the analysis result.

Fig. 3 is a schematic diagram illustrating an analysis flow of a registration process according to an embodiment of the present disclosure. As shown in fig. 3, the ONUs have a total of 7 different registration states during the entire process of registering with the OLT. With the message interaction between the ONU and the OLT, the ONU will switch back and forth between these 7 registration states. Fig. 3 is a logic diagram illustrating a state change of an ONU driven by different PLOAM messages during a registration process. The registration state data acquisition module focuses on the changes of the states of the ONUs in O1-O7 and PLOAM messages sent and received by the ONUs in each state on a sequence time axis. When the ONU is stably in the operating state (O5 state), the OLT issues all the configurations required for registering the ONU, and the ONU configures and feeds back the parameters according to the configuration requirements to complete the registration process.

The status and registration process of the ONU is shown in fig. 3:

and the registration state data analysis module pays attention to and analyzes the whole registration process, and the registration process is specified by the state of the ONU and the functional behavior in the state transition. For the general registration flow, attention needs to be paid to the process from the state O1 to O5.

The ONU is in an initial state immediately after power-on (O1), and upon receiving a downstream from the OLT, the ONU transitions to a standby state (O2).

The ONU in the standby state (O2) has received the downstream data stream from the OLT and is in a state of waiting for receiving the network parameters; when the ONU receives an Upstream data message (Upstream _ Overhead), it performs related configuration according to the network parameter in the message, and transitions to a serial number state (O3).

In the serial number state (O3), the ONU waits for the OLT to give an assigned ONU-ID; the OLT sends Serial-Number (Serial-Number) messages to all the ONUs in the state so as to discover new ONUs and Serial numbers of the new ONUs, when the OLT discovers the new ONUs, the OLT assigns ONU-IDs to the ONUs, and the OLT completes the issuing of the ONU-IDs by distributing ONUID (Assign _ ONU-ID) messages; the ONU acquires the ONU-ID and then shifts to the ranging state (O4).

In the ranging state (O4), the ONU may obtain an equalization delay; different ONU sending signals are kept synchronous when reaching the OLT, so that the ONU needs an equalizing time delay which is measured in a ranging state; the ONU receives the equalizing delay Ranging _ Time message and transitions to the running state (O5).

The ONU in the running state (O5) can send uplink data and PLOAM messages under the control of the OLT, and the ONU in the running state can also establish other connections according to the requirements and is in a normal working running state after the successful registration; after ranging is successful, all ONUs send signals according to respective equalization time delays to keep synchronization of uplink data sent to the OLT, signals sent by different ONUs respectively reach the OLT, but each signal happens to appear at a position where the signal should appear in the uplink data.

The registration state data analysis module completes the following work:

and judging whether the registration is normally completed or not according to the final registration state and the configuration synchronization condition of the ONU, and if the registration is not normally completed (the ONU is not normally in the running state (O5) or the configuration synchronization is not normally completed), judging whether the abnormal reason belongs to a software layer or a physical layer.

The registration abnormal reason preferentially considers that software interaction is blocked, if synchronous configuration is abnormal, the software problem is attributed to, and an analysis result can prompt a possible error range according to protocol logic;

if the registration process is blocked in other states except O5 between O1-O7, the messages of successful receiving and sending and failure of receiving and sending at the stage are integrated, and whether the exception belongs to the physical connection level or the mismatching of the software configuration level is judged; the stagnation of the registration flow in a specific state has a specific reason, and the reason of the abnormality can be deduced according to the state of the stagnation, for example, the state is always in an initial state (O1), and basically belongs to physical connection failure; after the analysis is completed, the module outputs the analysis result to a registration abnormity reason prompting module, and the module can prompt possible reasons of registration failure.

After software configuration interaction abnormality and hardware link abnormality are eliminated, when the optical module transceiving optical function (transceiving optical power) of the ONU (or OLT) is abnormal, if the optical power is too large or too small, packet loss of different degrees occurs in the message interaction process between the OLT and the ONU, and when the packet loss is too much, normal transceiving of the PLOAM message by the optical module in the registration process is necessarily affected, thereby affecting the switching of the ONU state, and causing ONU registration failure. The ONU registration is failed due to link connection abnormity, software configuration abnormity, optical power abnormity and the like, but different reasons have different expressions in a message interaction layer. Through the statistical analysis of PLOAM information and ONU registration state, and in combination with practical engineering application, whether the registration process is influenced by hardware reasons can be judged, and especially the abnormal condition of the light receiving and transmitting of the optical module is not easy to be found visually from the surface.

Description of the judging method of the registration state data analysis module:

when the registration is abnormal, the optical fiber can be disconnected, the function of detecting the registration abnormality is started, then the optical fiber is plugged, and the abnormal detection result is prompted after the operation is carried out for a period of time (such as 5 min).

The registration state data acquisition module records the registration result (success or failure) of the ONU when the timer ends, the number of times of each stage of O1-O7 where the ONU is located in the final registration stage, and the number of times of successfully receiving and sending the corresponding message in each stage during the timing period.

According to the ONU registration flow, the times of jumping paths from the O1 to the O5 at all stages are recorded. The number num of O1 to O2 phases was recorded_1-2Number of O2 to O3 phases num_2-3Number of O3 to O2 phases num_3-2Number of O3 to O4 phases num_3-4Number of O4 to O2 phases num_4-2Number of O4 to O5 phases num_4-5Number of O5 to O2 phases num_5-2(ii) a Once num_5-2Increase by 1 time, num_2-3，num_3-2, num_3-4，num_4-2And clearing all the data.

Recording the Number of times NUM _ SN _ Request of receiving the Serial Number Request (SN _ Request) message in the O3 stage, recording the Number of times NUM _ Serial _ Number _ ONU of the Serial Number (Serial _ Number _ ONU) transmitted in the O3 stage, and recording the Number of times NUM _ Assign _ ONU _ ID of receiving the registration ID (Assign _ ONU _ ID) message in the O3 stage; recording the times NUM _ Ranging _ Request of receiving the Ranging Request (Ranging _ Request) message in the O4 stage, recording the times NUM _ Ranging _ Response of sending the Ranging Response (Ranging _ Response) message in the O4 stage, and recording the times NUM _ Ranging _ Time of receiving the equalizing delay (Ranging _ Time) message in the O4 stage; the method comprises the steps of recording the times NUM _ Request _ PassWord of receiving a Password acquisition (Request _ PassWord) message in the O5 stage, recording the times NUM _ PassWord of sending the Password (PassWord) message in the O5 stage, and recording the times NUM _ Deactivate _ OnuID of receiving a Deactivate _ OnuID message in the O5 stage. And simultaneously recording whether each message is abnormal in receiving and sending.

The data analysis module works as follows, and the processes are all based on the environment that the registration is not completed normally.

1) When the registration fails, if the ONU is in the O7 stage, the equipment enters an emergency state; and if the ONU is in the stage of O1 or O6, no data interaction exists, and the abnormality of the optical fiber physical connection is prompted.

2) Num is judged_5-2Value of (d), if num_5-2>1, acquiring data synchronization abnormity warning. If the alarm exists, prompting the reason of the data abnormity corresponding to the alarm (Anomaly parameters and causes). And when the alarm does not exist, prompting that the optical module of the ONU equipment receives and transmits light abnormally.

3) If num_5-2And if the value is equal to 1, acquiring a data synchronization abnormity alarm. And if the alarm exists, prompting the data abnormal reason (abnormal parameter and reason) corresponding to the alarm. When the alarm does not exist, if the message receiving and sending at the stage O5 is abnormal, prompting the reason of the abnormality; and if the message is not abnormal and the NUM _ Deactivative _ OnuID is larger than 0, prompting the ONU to register the SN abnormal (the SN does not exist or the SN conflicts with other ONUs)/the password is not matched, checking whether the OLT implements the silencing function on the ONU or not, and if not, continuing.

4)num_5-2Equal to 1 and does not satisfy the step 3 condition, or num_5-2Equal to 0. At this time if num_3-4If the message is more than 0, giving an abnormal prompt if the messages of the Ranging _ Request, the Ranging _ Response and the Ranging _ Time are abnormal; and if no abnormity exists, prompting that the optical module of the ONU equipment receives and transmits light abnormally. If num_2-3If the SN _ Request, the Serial _ Number _ ONU and the Assign _ ONU _ ID message are abnormal, giving an abnormal prompt; and if no abnormity exists, prompting that the optical module of the ONU equipment receives and transmits light abnormally.

The technical method is mainly applied to the existing network test and the general operation and maintenance environment, when the ONU registers abnormity to the OLT, the reason of the abnormal registration (especially the problem of the optical abnormity of the hidden optical module for receiving and transmitting light) can be quickly judged and positioned according to the abnormal registration prompt, so that the problem of registration can be solved in time, the network access is promoted, and the operation and maintenance work efficiency is improved.

The method for judging whether the PON module receives and emits light normally under the GPON mode based on the software capability is realized, and the problem that hardware conditions are often insufficient in the existing network testing process is effectively solved. Meanwhile, various registration states in the process of registering the ONU to the OLT are monitored, various abnormal states in the registration process are analyzed and opinions are given, and the reason of the abnormal problems is rapidly located on site.

Claims

1. A method for detecting abnormal registration in optical communication network includes

Acquiring current registration state information;

when the current registration state is a non-operation state, acquiring an interactive message generated in the registration process;

searching preset registration failure reason information according to the interaction information;

and outputting the registration failure reason information to the outside.

2. The detection method according to claim 1, further comprising, before obtaining the current registration status information:

starting timing after power-on;

and acquiring the current registration state information after a preset time.

3. The detection method according to claim 1, wherein the interaction information includes handover information of registration status and physical layer operation management and maintenance messages.

4. The detection method according to claim 1, wherein searching for the preset registration failure cause information according to the interaction information comprises:

if the switching frequency of the running state to the standby state is more than 1 time and no data synchronization abnormity warning exists, the registration failure reason is abnormal light receiving and emitting;

and if the switching frequency of the running state to the standby state is 1 time, the data synchronization abnormity warning does not exist, the message abnormity does not exist, and the acquisition frequency of the equipment number is greater than 0, prompting that the reason of the registration failure is mismatching of the serial number/the password.

5. An optical communication network registration abnormality detection apparatus, comprising

The registration state data acquisition module can carry out statistics and storage on the interaction information;

a registration state data analysis module: analyzing the current registration state according to the interactive information, and analyzing whether the receiving and sending of the physical layer operation management and maintenance message are abnormal or not;

the registration abnormal reason prompting module: and prompting the reason of the registration failure according to the result of the registration state data analysis module.

6. The detection apparatus of claim 5, further comprising a timing module; the timing module can time after the equipment is powered on.