An OLT device, an ONU device and a method for remote management and control of a faulty ONU

Abstract

The application discloses an OLT device, an ONU device and a method for remote management and control of a fault ONU, which comprises a first top adjustment management unit and a first top adjustment transceiving unit; the first top adjustment transceiving unit is connected with the first top adjustment management unit; the first top adjustment management unit is used for creating a management message; the first top adjustment transceiving unit is used for converting the management message into a downlink top adjustment communication message, and sending the downlink top adjustment communication message to the ONU device; the first top adjustment transceiving unit is used for receiving an uplink top adjustment communication message from the ONU device; and the first top adjustment management unit is used for processing the uplink top adjustment communication message to obtain an execution result of the ONU device, wherein the uplink top adjustment communication message is a response message of the downlink top adjustment communication message. The OLT remote control of the fault ONU is realized by using the top adjustment communication technology, the OLT can remotely send an instruction to the ONU to obtain local information of the ONU, so that the fault can be remotely recovered and the cause of the fault can be located, and the ONU can work normally.

Description

Technical Field

[0001] This invention belongs to the field of communication technology, and more specifically, relates to a method for remote management and control of an OLT device, an ONU device, and a faulty ONU. Background Technology

[0002] PON (Passive Optical Network) is currently the most widely used optical access system. It has many advantages such as high bandwidth, high efficiency, high service quality, wide coverage and rich user interfaces. It is the ideal technology for most operators to realize broadband and integrated access network services.

[0003] Currently, in PON system engineering applications, occasional malfunctions of the ONU (Optical Network Unit) prevent message exchange and data transmission with the OLT (Optical Line Terminal), causing the OLT to lose management and control over the ONU. In this situation, the OLT cannot remotely send commands to the ONU or remotely obtain local information from the ONU, thus hindering remote fault recovery and fault location. Maintenance personnel must then travel to the fault location, restore the faulty ONU, and obtain local information for fault analysis. This method is inefficient and costly.

[0004] Therefore, when the ONU malfunctions and cannot exchange messages or transmit data with the OLT, how the OLT can remotely restore the faulty ONU and obtain local information to locate the cause of the fault is a problem to be solved. Summary of the Invention

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a method for remote control of OLT devices, ONU devices, and faulty ONUs. Its purpose is to utilize OLT communication technology to enable remote control of faulty ONUs by the OLT. The OLT can remotely send commands to the ONU to obtain local information from the ONU, thereby remotely recovering from the fault and locating the cause of the fault, ensuring its normal operation. This solves the technical problem of how to control ONU devices when they malfunction and cannot communicate or transmit data between the ONU and the OLT.

[0006] To achieve the above objectives, according to a first aspect of the present invention, an OLT device is provided, including a first top-level control unit and a first top-level transceiver unit; the first top-level transceiver unit is connected to the first top-level control unit.

[0007] The first top-level control unit is used to create control messages; the first top-level transceiver unit is used to convert the control messages into downlink top-level communication messages and send the downlink top-level communication messages to the ONU device.

[0008] The first top-level adjustment transceiver unit is used to receive uplink top-level adjustment communication messages from the ONU device; the first top-level adjustment control unit is used to process the uplink top-level adjustment communication messages to obtain the execution results of the ONU device, wherein the uplink top-level adjustment communication message is a response message to the downlink top-level adjustment communication message.

[0009] Furthermore, the OLT device is equipped with a first TOSA, which is connected to the first top-down transceiver unit;

[0010] The first top-tuning transceiver unit is used to adjust the transmit optical power of the first TOSA according to the downlink top-tuning communication message, so as to load the downlink top-tuning communication message onto the optical signal.

[0011] Furthermore, under the condition that the optical signal can be transmitted normally, the first top-tuning transceiver unit is used to adjust the minimum transmit optical power value P0 and the maximum transmit optical power value P1 of the first TOSA; the minimum transmit optical power value P0 is mapped to a first logic level, and the maximum transmit optical power value P1 is mapped to a second logic level;

[0012] The first top-tuning transceiver unit is used to convert the downlink top-tuning communication message into a control flow characterized by a first logic level and a second logic level, and adjust the transmit optical power of the first TOSA according to the logic level corresponding to each data bit of the control flow, so as to load the downlink top-tuning communication message onto the optical signal.

[0013] Furthermore, the OLT device is equipped with a first ROSA, which is connected to the first top-adjusting transceiver unit;

[0014] The first ROSA is used to receive uplink top-level communication messages from the ONU device, process the uplink top-level communication messages, and obtain an RSSI signal;

[0015] The first top-level transceiver unit is used to convert the uplink top-level communication message into a response stream characterized by logic levels according to the strength of the RSSI signal, and send the response stream to the first top-level control unit.

[0016] The first top control unit is used to determine the execution result of the ONU device based on the response flow.

[0017] Furthermore, the frame structure of the uplink top-down communication message and the downlink top-down communication message is the same;

[0018] The frame structure of a communication message includes: frame header, destination ID, source ID, command ID, sequence number, payload, and frame trailer;

[0019] The frame header consists of fixed special bytes that represent the start of a frame;

[0020] The destination ID is the destination of the communication message, and the source ID is the source of the communication message.

[0021] Command IDs represent different instructions, including one or more of the following: reboot, restore factory settings, image upgrade, and log reporting; different instructions have different values ​​for their command IDs.

[0022] The sequence number represents the frame sequence number, which starts from 1 and increments. The value x represents the xth frame of the same instruction.

[0023] The payload is the message content of the instruction;

[0024] The frame tail is a fixed special byte that indicates the end of a frame.

[0025] To achieve the above objectives, according to a second aspect of the present invention, an ONU device is provided, comprising: a second top-level transceiver unit and a second top-level control unit, wherein the second top-level transceiver unit is connected to the second top-level control unit;

[0026] The second top-level adjustment transceiver unit is used to receive downlink top-level adjustment communication messages from the OLT device described in the first aspect, and send the downlink top-level adjustment communication messages to the second top-level adjustment control unit;

[0027] The second top-level control unit is used to perform corresponding actions according to the downlink top-level communication message and to feed back the execution result to the second top-level transceiver unit;

[0028] The second top-level adjustment transceiver unit is used to convert the execution result into an uplink top-level adjustment communication message and send the uplink top-level adjustment communication message to the OLT device.

[0029] Furthermore, the ONU device also includes a second TOSA and a second ROSA; the second TOSA and the second ROSA are respectively connected to the second top-adjustment transceiver unit;

[0030] The second ROSA is used to receive downlink top-level communication messages from the OLT device, process the downlink top-level communication messages, and obtain the RSSI signal;

[0031] The second top-level transceiver unit is used to convert the downlink top-level communication message into a control flow represented by logic levels according to the strength of the RSSI signal, and send the control flow to the second top-level control unit;

[0032] The second top-level control unit is used to execute corresponding actions according to the control flow and to feed back the execution results to the second top-level transceiver unit;

[0033] The second top-adjustment transceiver unit is used to adjust the minimum transmit optical power value P0' and the maximum transmit optical power value P1' of the second TOSA; to form a mapping relationship between the minimum transmit optical power value P0' and the first logic level, and to form a mapping relationship between the maximum transmit optical power value P1' and the second logic level;

[0034] The second top-level transceiver unit is used to convert the execution result into an uplink top-level communication message, convert the uplink top-level communication message into a response stream characterized by a first logic level and a second logic level, and adjust the transmit optical power of the second TOSA according to the logic level corresponding to each data bit of the response stream, so as to load the uplink top-level communication message onto the optical signal.

[0035] Furthermore, the ONU device includes a separate ONU and a second optical module, the ONU and the second optical module are connected, the second top-level transceiver unit is disposed in the second optical module, and the second top-level control unit is disposed in the ONU;

[0036] Alternatively, the optical module at the ONU end can be integrated with the ONU to form the ONU device.

[0037] To achieve the above objectives, according to a third aspect of the present invention, a method for remote management and control of a faulty ONU in a PON system is provided, wherein the method is applied to an OLT device as described in the first aspect, comprising:

[0038] When the OLT device does not receive a response from the ONU device within the predetermined time, the OLT device sends a downlink adjustment communication message to the ONU device.

[0039] The OLT device receives an uplink top-down communication message from the ONU device, processes the uplink top-down communication message to obtain the execution result of the ONU device, wherein the uplink top-down communication message is a response message to the downlink top-down communication message.

[0040] To achieve the above objectives, according to a fourth aspect of the present invention, a method for remote management and control of a faulty ONU in a PON system is provided. This method is applied to the ONU device as described in the second aspect, and includes:

[0041] The ONU device receives downlink top-level communication messages from the OLT device and performs corresponding actions based on the downlink top-level communication messages.

[0042] The execution result is converted into an uplink top-level communication message and sent to the OLT device.

[0043] In summary, compared with existing technologies, the technical solutions conceived in this invention have the following beneficial effects: The method for remotely managing OLT devices, ONU devices, and faulty ONUs provided in this embodiment of the invention, under the premise that both the TOSA and ROSA at the OLT and ONU ends are working normally, utilizes top-level communication technology to enable the OLT to remotely control the faulty ONU. The OLT can remotely send commands to the ONU to obtain the ONU's local information, thereby remotely recovering from the fault and locating the cause of the fault, ensuring its normal operation. When the ONU malfunctions, management messages and data exchange such as PLOAM, OMCI, OAM, and TR069 cannot occur between the ONU and the OLT. When the ONU is disconnected from management, engineering maintenance personnel do not need to go to the fault site, significantly improving the efficiency of engineering fault resolution and reducing costs, which is of great significance to engineering operation and maintenance. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of a PON system according to an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the top-down management structure in a PON system according to an embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram illustrating the relationship between the roof control system and other components in an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the specific structure of a top-down management system in a PON system according to an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the structure of an OLT device according to an embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram of a communication data structure in an embodiment of the present invention;

[0050] Figure 7 A schematic diagram of a data conversion process provided in an embodiment of the present invention;

[0051] Figure 8 This is a schematic diagram of another data conversion process provided in an embodiment of the present invention;

[0052] Figure 9 This is a schematic diagram of the structure of an integrated ONU device according to an embodiment of the present invention;

[0053] Figure 10This is a schematic diagram of the structure of a non-integrated ONU device according to an embodiment of the present invention;

[0054] Figure 11 This is a schematic diagram of the frame structure of a top-level communication message in an embodiment of the present invention;

[0055] Figure 12 This is a flowchart illustrating a method for remote management and control of a faulty ONU in a PON system according to an embodiment of the present invention.

[0056] Figure 13 This is a flowchart illustrating a method for remote management of a faulty ONU in a PON system according to an embodiment of the present invention. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0058] Example 1:

[0059] like Figure 1 As shown, in PON system engineering applications, occasionally an ONU malfunctions, preventing message exchange and data transmission between it and the OLT, causing the OLT to lose management and control over the ONU. In this situation, the OLT cannot remotely send commands to the ONU or remotely obtain local information from the ONU, thus hindering remote fault recovery and fault location. Maintenance personnel must then travel to the fault location, restore the faulty ONU, and obtain local information for fault cause analysis. This method is inefficient and costly.

[0060] Therefore, when the ONU malfunctions and cannot exchange messages or transmit data with the ONU, including messages such as PLOAM, OMCI, OAM, and TR069, the question of how the OLT can remotely recover the faulty ONU and obtain local information to locate the cause of the fault is a problem to be solved.

[0061] In view of the shortcomings of existing technologies, such as Figure 2 As shown, this embodiment provides a PON system, which optimizes the OLT and ONU ends of the PON system. A first top-level management system is added to the OLT end, and the first top-level management system is connected to the first PON management system of the OLT end; at the same time, a second top-level management system is added to the ONU end, and the second top-level management system is connected to the second PON management system of the ONU end.

[0062] The communication method between the first ceiling control system and the first PON control system is basically the same as the communication method between the second ceiling control system and the second PON control system. Here, we will only refer to... Figure 3 This section describes the communication method between the ceiling-mounted control system and the PON management system. The ceiling-mounted control system and the PON management subsystem exist independently. The ceiling-mounted control system can obtain data information from the PON management system. This data information primarily refers to the ONU's own management data, such as the physical serial number (SN) and ONU authorization ID. When the ONU malfunctions, management messages and data exchange (PLOAM, OMCI, OAM, TR069, etc.) between the ONU and the OLT cannot occur. Even when the ONU is disconnected (i.e., the PON management system is not functioning properly), the ceiling-mounted control system can still operate normally and can control access to the underlying drivers. When the ONU is disconnected, the OLT retains the ONU's uplink transmission time slots. Through the ceiling-mounted control system, it controls the corresponding TOSA and ROSA, enabling interaction between the OLT and ONU by loading ceiling-mounted communication messages onto the optical signal. The database is shared; both the ceiling-mounted control system and the PON management system can read and write to it.

[0063] Furthermore, such as Figure 4 As shown, the first roof adjustment management system includes a first roof adjustment control unit and a first roof adjustment receiving unit, the locations and operating methods of which are detailed below. The second roof adjustment management system includes a second roof adjustment control unit and a second roof adjustment receiving unit, the locations and operating methods of which are detailed below.

[0064] The first top-mount adjustment control unit is responsible for managing the entire top-mount adjustment management system. It sends downlink top-mount adjustment communication messages to each connected ONU via top-mount adjustment communication. These messages carry instructions, including restart, factory reset, upgrade, and log reporting. Simultaneously, it is responsible for receiving and processing uplink top-mount adjustment communication messages from ONUs, such as log information reported by ONUs, and performing analysis and processing.

[0065] The second top-level control unit is responsible for processing downlink top-level control communication messages sent by the OLT and executing various instructions sent by the OLT, such as receiving upgrade image content and updating its own software version. Simultaneously, it sends log information such as the time of the fault to the OLT via uplink top-level control communication messages.

[0066] The first top-level transceiver unit is responsible for sending downlink top-level communication messages and receiving uplink top-level communication messages; the second top-level transceiver unit is responsible for sending uplink top-level communication messages and receiving downlink top-level communication messages. The top-level transceiver unit can be set in the PON port optical module or the PON system equipment, which refers to the OLT or ONU.

[0067] In addition, such as Figure 1 In the PON system shown, the PON port of the OLT can connect to multiple ONUs via the ODN, and these ONUs share the backbone fiber to communicate with the OLT. At the same time, multiple ONUs may simultaneously send uplink data to the OLT, or uplink and downlink optical modulation signals may appear simultaneously on the same fiber. These optical modulation signals can interfere with each other and cause conflicts, leading to data distortion, garbled characters, and ultimately, failure to communicate normally.

[0068] To address this issue, in this embodiment of the invention, the downlink top-level communication messages sent by the OLT are broadcast, ensuring that each ONU receives the downlink top-level communication messages simultaneously. The uplink top-level communication messages sent by the ONU are sent serially, with each ONU sending its message at a different time, managed by the OLT. Only one ONU is allowed to send a top-level communication message at any given time to avoid conflicts.

[0069] The ONU will not proactively send messages to the OLT via communication. Only when the ONU receives a communication message from the OLT containing a destination ID that belongs to itself will it perform message parsing and then send a communication message to the OLT in response.

[0070] This embodiment adds a top-level management system to the traditional PON system. When an ONU fails and cannot interact with the OLT for message exchange and data transmission, the OLT can still remotely control the ONU through the top-level management system, send commands to the ONU, recover from the fault, and obtain local information to locate the cause of the fault. Simultaneously, the top-level management system can also be used to remotely upgrade the ONU. This significantly improves the efficiency of troubleshooting engineering problems, reduces costs, and is of great significance for engineering operation and maintenance.

[0071] The optical path modulation management system communicates using optical path modulation communication technology. This technology superimposes a low-speed optical accompanying signal onto the optical signal, without occupying the original optical signal's service channel or interfering with existing optical signal transmission, while simultaneously enabling the transmission of the low-speed modulation signal. Based on optical path modulation communication technology, data transmission and reception are similar to UART, employing an asynchronous serial transmission method.

[0072] The specific implementation details of the top adjustment management system are described below.

[0073] Example 2:

[0074] This embodiment provides an OLT device, which is deployed at the OLT end. The OLT device includes a first top-level control unit and a first top-level transceiver unit; the first top-level transceiver unit is connected to the first top-level control unit.

[0075] Based on the aforementioned PON system, for the OLT end, the PON port optical module can be independent of the OLT. In this structure, the first modulation and control unit needs to be located in the OLT, and the first modulation and transceiver unit needs to be located in the PON port optical module. Based on this architecture, such as... Figure 5 As shown, this embodiment provides an OLT device, which includes an OLT and a first optical module. The OLT is connected to the first optical module. A first top-level control unit is disposed within the OLT, and a first top-level transceiver unit is disposed within the first optical module. The first top-level transceiver unit is connected to the first top-level control unit via a communication link. For example, the first top-level control unit communicates via I... 2 Channel C communicates with the first modulation / transfer unit via modulation / transfer messages. The first modulation / transfer unit is located on the OLT's CPU; it can be understood that the CPU integrates corresponding software designs that implement the functions of the first modulation / transfer unit. The first modulation / transfer unit is located on the MCU of the first optical module; it can be understood that the MCU integrates corresponding software designs that implement the functions of the first modulation / transfer unit.

[0076] The first top-level control unit is used to create control messages; the first top-level transceiver unit is used to convert the control messages into downlink top-level communication messages and send the downlink top-level communication messages to the ONU device. Specifically, the downlink top-level communication messages control the corresponding TOSA luminous power to load the downlink top-level communication messages into the optical signal, forming a downlink optical signal, and the downlink optical signal carrying the downlink top-level communication messages is sent to the ONU device.

[0077] The first top-level adjustment transceiver unit is used to receive uplink top-level adjustment communication messages from the ONU device; the first top-level adjustment control unit is used to process the uplink top-level adjustment communication messages to obtain the execution results of the ONU device, wherein the uplink top-level adjustment communication message is a response message to the downlink top-level adjustment communication message.

[0078] In this case, both the TOSA and ROSA of the OLT and ONU ends are normal, and the OLT end continues to retain the uplink emission time slot of the ONU end. Therefore, the downlink and uplink top-tuning communication messages can be loaded onto the optical signal and transmitted at the OLT and ONU ends in the form of optical signals.

[0079] In practical application scenarios, the OLT is also equipped with a first PON management system, which is connected to the first top-level control unit. The first PON management system periodically sends interactive messages to the ONU to obtain the ONU's working status information. These interactive messages can be: PLOAM messages, OMCI messages, OAM messages, TR069 messages, etc. When the ONU does not respond to the OLT for a certain period of time, the OLT starts the first top-level control system and sends a top-level communication message to the ONU through optical path top-level communication.

[0080] The first modulation transceiver unit is responsible for sending and receiving modulation communication messages. In the sending direction, the first modulation transceiver unit controls the bias current or voltage of the first TOSA via a DAC to change the optical power, thereby loading a modulation signal onto the optical signal to achieve message transmission. In the receiving direction, the first modulation transceiver unit detects the strength of the RSSI signal received by the first ROSA to achieve information reception.

[0081] More specifically, the OLT device is equipped with a first TOSA, which is connected to the first top-adjustment transceiver unit; the OLT device is also equipped with a first ROSA, which is connected to the first top-adjustment transceiver unit.

[0082] based on Figure 5 Specifically, the architecture includes a first TOSA within the first optical module, which is connected to the first top-tuning transceiver unit; and a first ROSA within the first optical module, which is also connected to the first top-tuning transceiver unit.

[0083] In the transmission direction, the workflow of the first top-adjustment transceiver unit and the first top-adjustment control unit is as follows:

[0084] When the OLT does not receive a response from the ONU within the predetermined time, the first top-level control unit will transmit the control message to the first top-level transceiver unit.

[0085] The first top-tuning transceiver unit is used to adjust the transmit optical power of the first TOSA according to the downlink top-tuning communication message, so as to load the downlink top-tuning communication message onto the optical signal.

[0086] In practical use, under the condition of normal optical signal transmission, the first tuning transceiver unit is used to adjust the minimum transmit optical power value P0 and the maximum transmit optical power value P1 of the first TOSA; a mapping relationship is formed between the minimum transmit optical power value P0 and a first logic level, and a mapping relationship is formed between the maximum transmit optical power value P1 and a second logic level. The first logic level can be 0, and the second logic level can be 1.

[0087] The first top-level modulation transceiver unit is used to convert the downlink top-level modulation communication message into a control flow characterized by a first logic level and a second logic level. It adjusts the transmit optical power of the first TOSA according to the logic level corresponding to each data bit of the control flow to load the downlink top-level modulation communication message onto the optical signal. The downlink top-level modulation communication message is then transmitted to the ONU device through the first TOSA. Specifically, the control flow is formed by "0" and "1". The control flow is parsed to obtain the logic level of each data bit, and the emission status of the first TOSA is controlled according to the logic level. When the current data bit is "0", the first TOSA is controlled to transmit an optical signal at the minimum transmit optical power value P0, with a preset delay. When the next data bit is "1", the first TOSA is controlled to transmit an optical signal at the maximum transmit optical power value P1, with a preset delay. Following the aforementioned method, the control message is loaded onto the optical signal to form the downlink top-level modulation communication message.

[0088] In the receiving direction, the workflow of the first top-adjustment transceiver unit and the first top-adjustment control unit is as follows:

[0089] The first ROSA is used to receive uplink top-level communication messages from the ONU device, process the uplink top-level communication messages, and obtain the RSSI signal.

[0090] The first top-level transceiver unit is used to convert the uplink top-level communication message into a response stream represented by logic levels according to the strength of the RSSI signal, and send the response stream to the first top-level control unit. The first top-level control unit is used to determine the execution result of the ONU device based on the response stream.

[0091] Specifically, the RSSI signal is converted by ADC to obtain the ADC value of the RSSI signal. When the ADC value is greater than the set value, it indicates that the RSSI signal is relatively strong, and its corresponding logic level is "1". When the ADC value is not greater than the set value, it indicates that the RSSI signal is relatively weak, and its corresponding logic level is "0". This forms a response stream characterized by "0" and "1", and the execution result of the ONU device is determined based on the response stream.

[0092] Combination Figure 6 and Figure 7 The method of converting the downlink communication message into a control flow characterized by the first logic level as "0" and the second logic level as "1" is specifically described.

[0093] The communication between the OLT and ONU is conducted using a simulated standard UART serial communication protocol, that is, the communication data structure of the UART serial communication protocol, through which communication messages are exchanged. For example... Figure 6As shown, the communication data structure includes a start bit, data bits immediately following the start bit, a parity bit, and a stop bit. The data bits consist of n bits, specifically D0 to Dn, where n can be 4, 5, 6, 7, or 8, depending on the specific situation.

[0094] Start bit: A logic "0" signal, indicating the start of transmitted characters.

[0095] Data bits: Following the start bit, multiple data bits constitute a character. ASCII code is typically used, and transmission can begin from the least significant bit or the most significant bit, with clock positioning. Multiple data bits can be linked together to form an instruction, with each data bit of the aforementioned control flow corresponding to that data bit.

[0096] Parity bit: This bit is added after the data bits to ensure that the number of "1" bits is either even (even parity) or odd (odd parity), thereby verifying the correctness of data transmission.

[0097] Stop bit: It is a marker indicating the end of a character of data. It can be 1, 1.5, or 2 bits high. Since data is timed on the transmission line, and each device has its own clock, slight asynchrony can easily occur between two devices during communication. Therefore, the stop bit not only indicates the end of transmission but also provides the computer with an opportunity to correct clock synchronization. The more bits used for the stop bit, the greater the tolerance for different clock synchronizations, but the data transmission rate will also be slower.

[0098] See Figure 7 The method for converting downlink top-level communication messages into control flow is as follows:

[0099] Step S11: Set the logic level of the start bit, and set bit_send_index = 0. Set the start bit to logic "0".

[0100] Step S12: Delay for a preset duration.

[0101] Step S13: Determine whether bit_send_index is less than the set value.

[0102] bit_send_index refers to the number of data bits. If it is less than the number of bits, proceed to step S14; otherwise, proceed to step S16.

[0103] Step S14: Set the logic level of the corresponding data bits. The control message can be converted into a binary value message, and then the logic level of the corresponding data bits can be set sequentially according to the binary value message.

[0104] Step S15: Delay for a preset duration and execute bit_send_index++.

[0105] After setting the logic level for a data bit, execute bit_send_index++.

[0106] Step S16: Set the logic level of the parity bit.

[0107] Step S17: Delay for a preset duration.

[0108] Step S18: Set the logic level of the stop bit to logic "1".

[0109] Step S19: Delay for a preset duration.

[0110] In accordance with the aforementioned method, the control message is converted into a control flow represented by "1" and "0" to facilitate the control of optical transmission power based on the control flow, thereby obtaining the downlink modulation communication message loaded on the optical signal.

[0111] Combination Figure 8 The specific implementation process of receiving information by detecting the strength of the ROSA RSSI signal is as follows:

[0112] Step S21: Obtain the ADC value of RSSI.

[0113] The downlink communication message is processed to obtain the corresponding RSSI signal. The RSSI signal is then converted by ADC to obtain the ADC value of the RSSI signal.

[0114] Step S22: Determine the high or low logic level.

[0115] The strength of the optical signal is determined by the ADC value, and then the logic level is determined. When the ADC value is greater than the set value, it means that the RSSI signal is relatively strong, and the corresponding logic level is "1", and step S24 is executed. When the ADC value is not greater than the set value, it means that the RSSI signal is relatively weak, and the corresponding logic level is "0", and step S23 is executed. Thus, a response stream characterized by "0" and "1" is formed.

[0116] Step S23: Set the corresponding BIT bit (i.e., data bit) to 0.

[0117] Step S24: Set the corresponding BIT bit (i.e., data bit) to 1.

[0118] Step S25: Store the received data. This data is the response stream.

[0119] In the aforementioned manner, the uplink modulation communication message loaded on the optical signal is converted into a response stream represented by "1" and "0" so as to determine the execution result of the ONU device based on the response stream.

[0120] Example 3:

[0121] Based on the aforementioned PON system, for the ONU end, the PON port optical module of the ONU end can be independent of the ONU and not integrated together; or, the PON port optical module of the ONU end can be integrated with the ONU. The deployment methods of the second top-mount transceiver unit and the second top-mount control unit differ depending on the product form.

[0122] In an optional embodiment, the optical module at the ONU end is integrated with the ONU to form the ONU device. See also Figure 9 This embodiment provides an ONU device, including: a second top-level transceiver unit and a second top-level control unit. The second top-level transceiver unit is connected to the second top-level control unit, and both the second top-level transceiver unit and the second top-level control unit are located within the ONU device. Furthermore, a second PON management system is also located within the ONU device. Both the second top-level control unit and the second top-level transceiver unit are located on the ONU's CPU. This can be understood as the CPU integrating corresponding software designs capable of implementing the functions corresponding to the second top-level control unit; the CPU also integrates other software designs capable of implementing the functions corresponding to the second top-level transceiver unit.

[0123] See Figure 10 In another optional embodiment, the ONU device includes a separate ONU and a second optical module, the ONU and the second optical module being connected. A second modulation transceiver unit is disposed within the second optical module, and a second modulation control unit is disposed within the ONU. A second PON management system is disposed within the ONU. The second modulation transceiver unit and the second modulation control unit are connected via a communication link, for example, via I... 2 The communication connection is established via Channel C. The second modulation and control unit is located on the ONU's CPU; this can be understood as the CPU integrating the corresponding software design, which enables the functions of the second modulation and control unit. The second modulation and transceiver unit is located on the MCU of the second optical module; this can also be understood as the MCU integrating the corresponding software design, which enables the functions of the second modulation and transceiver unit.

[0124] Although the deployment methods of the second top-adjustment transceiver unit and the second top-adjustment control unit differ across product forms, the workflow of the ONU equipment is basically the same, as follows:

[0125] In practical application scenarios, the ONU is also equipped with a second PON management system, which is connected to the first top control unit. The second PON management system receives interactive messages sent by the first PON management system to enable normal services.

[0126] When the ONU fails, the second top-level control transceiver unit is used to receive downlink top-level control communication messages from the OLT device described in the foregoing embodiments, and send the downlink top-level control communication messages to the second top-level control unit.

[0127] The second top-level control unit is used to perform corresponding actions according to the downlink top-level communication message and to feed back the execution result to the second top-level transceiver unit; that is, the second top-level control unit parses the downlink top-level communication message and performs corresponding actions according to the instructions in the message, such as: restart, restore factory, upgrade, report logs, etc.

[0128] The second top-level modulation transceiver unit is used to convert the execution result into an uplink top-level modulation communication message and send the uplink top-level modulation communication message to the OLT device. Specifically, the uplink top-level modulation communication message controls the corresponding TOSA emission power to load the uplink top-level modulation communication message into the optical signal, forming an uplink optical signal, and the uplink optical signal carrying the uplink top-level modulation communication message is sent to the ONU device.

[0129] Furthermore, the ONU device also includes a second TOSA and a second ROSA; the second TOSA and the second ROSA are respectively connected to the second top-adjustment transceiver unit.

[0130] In practical use, the second ROSA is used to receive downlink top-level communication messages from the OLT device, process the downlink top-level communication messages to obtain an RSSI signal; the second top-level transceiver unit is used to convert the downlink top-level communication messages into a control flow represented by logic levels according to the strength of the RSSI signal, and send the control flow to the second top-level control unit; the second top-level control unit is used to execute corresponding actions according to the control flow and feed back the execution results to the second top-level transceiver unit.

[0131] The second top-tuning transceiver unit is used to adjust the minimum transmit optical power value P0' and the maximum transmit optical power value P1' of the second TOSA; to form a mapping relationship between the minimum transmit optical power value P0' and the first logic level, and to form a mapping relationship between the maximum transmit optical power value P1' and the second logic level; the second top-tuning transceiver unit is used to convert the execution result into an uplink top-tuning communication message, to convert the uplink top-tuning communication message into a response stream characterized by the first logic level and the second logic level, and to adjust the transmit optical power of the second TOSA according to the logic level corresponding to each data bit of the response stream, so as to load the uplink top-tuning communication message onto the optical signal.

[0132] The data interaction and data conversion process between the second top-adjustment transceiver unit and the second top-adjustment transceiver unit is similar to the implementation method of the OLT end, and will not be repeated here.

[0133] Example 4:

[0134] Based on the foregoing embodiments, this embodiment also provides a frame structure for a top-down communication message, which sets the corresponding top-down communication message through a corresponding frame structure. The frame structures of the uplink and downlink top-down communication messages in the foregoing embodiments are the same.

[0135] like Figure 11 As shown, the frame structure of a telemetry communication message includes: frame header, destination ID, source ID, command ID, sequence number, payload, and frame trailer. The frame header, destination ID, source ID, command ID, sequence number, payload, and frame trailer are equivalent to... Figure 6 The data bits in the frame are set with values ​​for information such as frame header, destination ID, source ID, command ID, sequence number, payload, and frame trailer, according to the actual situation, and then the corresponding values ​​are encapsulated in... Figure 6 The data bits shown.

[0136] The frame header consists of fixed special bytes representing the start of a frame; the destination ID is the destination of the communication message, and the source ID is the source of the communication message; the command ID represents different instructions, including one or more of the following: reboot, restore factory settings, image upgrade, and log reporting; different instructions have different values ​​for the command ID; the sequence number represents the frame sequence number, starting from 1 and incrementing, with the value x representing the xth frame of the same instruction; the payload is the message content of the instruction; and the frame tail consists of fixed special bytes representing the end of a frame.

[0137] In an optional embodiment, the frame header occupies 2 bytes, the destination ID occupies 1 byte, the source ID occupies 1 byte, the sequence number occupies 1 byte, the payload occupies N bytes, and the frame trailer occupies 1 byte.

[0138] The PON port ID can be 0xFF, and the ONU ID is the same as the ONUID assigned by the OLT after successful ONU registration. The destination ID of downlink communication messages is the ONUID, and the source ID is the PON port ID; the destination ID of uplink communication messages is the PON port ID, and the source ID is the ONUID.

[0139] Different values ​​for the command ID represent different instructions. For example, 1 represents reboot, 2 represents factory reset, 3 represents image upgrade, and 4 represents log reporting.

[0140] Example 5:

[0141] like Figure 12 As shown, this embodiment provides a method for remote management and control of a faulty ONU in a PON system. This method is applied to the OLT device in Embodiment 2 and includes:

[0142] Step 101: When the OLT device does not receive a response from the ONU device within the predetermined time, the OLT device sends a downlink communication message to the ONU device.

[0143] The downlink top-level communication message is loaded onto the optical signal. Specifically, a control flow characterized by logic levels is generated based on the control information, and the transmit optical power of the OLT terminal TOSA is controlled according to the control flow to load the downlink top-level communication message onto the optical signal. For details on the specific implementation, please refer to the aforementioned embodiments, which will not be repeated here.

[0144] Step 102: The OLT device receives the uplink adjustment communication message from the ONU device, processes the uplink adjustment communication message, and obtains the execution result of the ONU device.

[0145] The uplink top-tuning communication message is a response message to the downlink top-tuning communication message.

[0146] The uplink modulation communication message is loaded onto the optical signal. Specifically, a response stream characterized by logic levels is generated based on the execution result, and the transmit optical power of the ONU's TOSA is controlled according to the response stream to load the uplink modulation communication message onto the optical signal. For details on the specific implementation, please refer to the aforementioned embodiments, which will not be repeated here.

[0147] The uplink top-level communication message is converted into an RSSI signal. Based on the strength of the RSSI signal, the uplink top-level communication message is converted into a response stream characterized by logic levels, so as to obtain the execution result based on the response stream.

[0148] The specific implementation method of remote management and control of faulty ONUs in the PON system is detailed in the aforementioned embodiments and will not be repeated here.

[0149] Example 6:

[0150] like Figure 13 As shown, this embodiment provides a method for remote management and control of a faulty ONU in the PON system. This method is applied to the ONU device as described in Embodiment 3, and includes:

[0151] Step 201: The ONU device receives a downlink top-down communication message from the OLT device and performs corresponding actions based on the downlink top-down communication message.

[0152] The downlink top-level communication message is loaded onto the optical signal. The downlink top-level communication message is converted into an RSSI signal. Based on the strength of the RSSI signal, the downlink top-level communication message is converted into a control flow represented by logic levels. The specific implementation method of executing the response action according to the control flow is detailed in the aforementioned embodiments and will not be repeated here.

[0153] Step 202: Convert the execution result into an uplink top-level communication message and send the uplink top-level communication message to the OLT device.

[0154] The uplink modulation communication message is loaded onto the optical signal. Specifically, a response stream characterized by logic levels is generated based on the execution result, and the transmit optical power of the ONU's TOSA is controlled according to the response stream to load the uplink modulation communication message onto the optical signal. For details on the specific implementation, please refer to the aforementioned embodiments, which will not be repeated here.

[0155] The specific implementation method of remote management and control of faulty ONUs in the PON system is detailed in the aforementioned embodiments and will not be repeated here.

[0156] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An OLT device, characterized by, The first top adjustment control unit and the first top adjustment transceiver unit are included; the first top adjustment transceiver unit is connected with the first top adjustment control unit; The first top adjustment control unit is used to create a control message; the first top adjustment transceiver unit is used to convert the control message into a downlink top adjustment communication message and send the downlink top adjustment communication message to an ONU device; The first top adjustment transceiver unit is used to receive an uplink top adjustment communication message from the ONU device; the first top adjustment control unit is used to process the uplink top adjustment communication message to obtain an execution result of the ONU device, wherein the uplink top adjustment communication message is a response message of the downlink top adjustment communication message; The downlink top adjustment communication message sent by the OLT terminal is sent in a broadcast manner, and each ONU can receive the downlink top adjustment communication message at the same time; the uplink top adjustment communication message sent by the ONU terminal is sent in a serial manner, and the time for each ONU to send the top adjustment communication message is different, which is controlled by the OLT, and only one ONU is allowed to send the top adjustment communication message at the same time; when the ONU terminal receives the top adjustment communication message from the OLT terminal and the destination ID in the top adjustment communication message belongs to itself, the ONU terminal will only perform message analysis and processing and send the top adjustment communication message to the OLT terminal for response.

2. The OLT device of claim 1, wherein, The first TOSA is arranged in the OLT device, and the first TOSA is connected with the first top adjustment transceiver unit; The first top adjustment transceiver unit is used to adjust the transmission optical power of the first TOSA according to the downlink top adjustment communication message, so as to load the downlink top adjustment communication message on an optical signal.

3. The OLT device of claim 2, wherein, In the case of meeting the normal transmission of the optical signal, the first top adjustment transceiver unit is used to adjust the minimum transmission optical power value P0 and the maximum transmission optical power value P1 of the first TOSA; the minimum transmission optical power value P0 is mapped with a first logic level, and the maximum transmission optical power value P1 is mapped with a second logic level; The first top adjustment transceiver unit is used to convert the downlink top adjustment communication message into a control stream represented by the first logic level and the second logic level, and adjust the transmission optical power of the first TOSA according to the logic level corresponding to each data bit of the control stream, so as to load the downlink top adjustment communication message on an optical signal.

4. The OLT device of claim 2, wherein, The first ROSA is arranged in the OLT device, and the first ROSA is connected with the first top adjustment transceiver unit; The first ROSA is used to receive an uplink top adjustment communication message from the ONU device, process the uplink top adjustment communication message, and obtain an RSSI signal; The first top adjustment transceiver unit is used to convert the uplink top adjustment communication message into a response stream represented by a logic level according to the strength of the RSSI signal, and send the response stream to the first top adjustment control unit; The first top adjustment control unit is used to determine an execution result of the ONU device according to the response stream.

5. The OLT device of claim 2, wherein, The frame structure of the uplink top adjustment communication message and the downlink top adjustment communication message is the same; The frame structure of the top adjustment communication message includes a frame header, a destination ID, a source ID, a command ID, a serial number, a payload, and a frame tail. Wherein, the frame header is a fixed special byte, representing the beginning of a frame; The destination ID is the sink of the over-the-top communication message, and the source ID is the source of the over-the-top communication message; The command ID represents different instructions, including one or more of restart, restore factory configuration, image upgrade and log reporting; different instructions have different command ID values; The serial number represents the frame serial number, which starts from 1 and increases by 1, and the value x represents the xth frame of the same instruction; The payload is the message content of the instruction; The frame tail is a fixed special byte, representing the end of a frame.

6. An ONU device, comprising: It comprises: A second over-the-top transceiver unit and a second over-the-top management and control unit, the second over-the-top transceiver unit is connected with the second over-the-top management and control unit; The second over-the-top transceiver unit is used for receiving the downlink over-the-top communication message from the OLT device of any one of claims 1-5, and sending the downlink over-the-top communication message to the second over-the-top management and control unit; The second over-the-top management and control unit is used for executing corresponding actions according to the downlink over-the-top communication message, and feeding back the execution result to the second over-the-top transceiver unit; The second over-the-top transceiver unit is used for converting the execution result into an uplink over-the-top communication message, and sending the uplink over-the-top communication message to the OLT device.

7. The ONU device of claim 6, wherein, The ONU device further comprises a second TOSA and a second ROSA; the second TOSA and the second ROSA are connected with the second over-the-top transceiver unit respectively; The second ROSA is used for receiving the downlink over-the-top communication message from the OLT device, processing the downlink over-the-top communication message to obtain an RSSI signal; The second over-the-top transceiver unit is used for converting the downlink over-the-top communication message into a control stream represented by a logic level according to the strength of the RSSI signal, and sending the control stream to the second over-the-top management and control unit; The second over-the-top management and control unit is used for executing corresponding actions according to the control stream, and feeding back the execution result to the second over-the-top transceiver unit; The second over-the-top transceiver unit is used for adjusting the minimum transmission optical power value P0' and the maximum transmission optical power value P1' of the second TOSA; the minimum transmission optical power value P0' and the first logic level form a mapping relationship, and the maximum transmission optical power value P1' and the second logic level form a mapping relationship; The second over-the-top transceiver unit is used for converting the execution result into an uplink over-the-top communication message, converting the uplink over-the-top communication message into a response stream represented by the first logic level and the second logic level, and adjusting the transmission optical power of the second TOSA according to the logic level corresponding to each data bit of the response stream, so as to load the uplink over-the-top communication message on the optical signal.

8. The ONU device of claim 6, wherein, The ONU device comprises a separate ONU and a second optical module, the ONU and the second optical module are connected, the second over-the-top transceiver unit is arranged in the second optical module, and the second over-the-top management and control unit is arranged in the ONU; Or, the optical module at the ONU end is integrated with the ONU to form the ONU device.

9. A method for remote management of a failed ONU in a PON system, the method comprising: The method for remotely managing and controlling the faulty ONU in the PON system is applied to the OLT device of any one of claims 1-5, and comprises: When the OLT device does not receive the response from the ONU device for more than a predetermined time, the OLT device sends a downstream communication message to the ONU device; The OLT device receives an upstream communication message from the ONU device, processes the upstream communication message to obtain the execution result of the ONU device, wherein the upstream communication message is a response message of the downstream communication message.

10. A method for remote management of a failed ONU in a PON system, the method comprising: The method for remote management and control of the faulty ONU in the PON system is applied to the ONU device as claimed in any one of claims 6 to 8, and comprises: The ONU device receives a downstream communication message from the OLT device, and performs corresponding actions according to the downstream communication message; The execution result is converted into an upstream communication message, and the upstream communication message is sent to the OLT device.

Images