Feeder terminal wireless operation and maintenance method and system based on PNP auto-negotiation

Abstract

The invention discloses a feeder terminal wireless operation and maintenance method and system based on PNP auto-negotiation, and the method comprises the steps: carrying out the adaptive opening of a wireless access point, enabling a feeder terminal to be opened for a period in a fixed interval, and carrying out the real-time adjustment according to the time and duration of the last wireless operation and maintenance; an auto-negotiation interaction model is established, and when a feeder terminal wireless access point is open, after a wireless operation and maintenance tool is connected with a terminal and a wireless channel is established, the two parties carry out auto-negotiation interaction, and reading of equipment parameters is completed; and performing auto-negotiation interaction, searching an access point by a wireless operation and maintenance tool, establishing a wireless channel, performing identity authentication and parameter verification, opening an operation and maintenance function after success, and exiting operation and maintenance and re-searching the access point of the feeder terminal if a message of the operation and maintenance tool is not received or no response is made when the message is continuously sent in the operation and maintenance process. Through a local wireless operation and maintenance mode, the problem of on-site feeder terminal pole climbing operation and maintenance is solved, and the feeder terminal operation and maintenance efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of power system operation and maintenance and wireless communication technology, and in particular to a feeder terminal wireless operation and maintenance method and system based on PNP auto-negotiation. Background Art

[0002] The feeder terminal is a secondary power monitoring device installed on the overhead line. It has remote control, telemetry, telesignaling and fault detection functions, and can communicate with the distribution automation master station to provide the distribution system operation status and various parameters, that is, the information required for monitoring and control. At present, the feeder terminal operation and maintenance business efficiency is not high. In operation and maintenance business scenarios such as fixed value modification, terminal program upgrade, professional inspection, on-site switch operation, fault information viewing, etc., operation and maintenance personnel are required to climb ladders and poles to operate. Operation and maintenance through wired methods have safety hazards and are inefficient. The use of wireless communication operation and maintenance can reduce the difficulty of on-site operation and maintenance of feeder terminals, but the power industry has high requirements for the security of wireless communication operation and maintenance. At the same time, due to the particularity of wireless communication, operators need to know the ID of the terminal wireless access point in advance during operation and maintenance, otherwise they cannot establish a wireless channel for operation and maintenance.

[0003] The present invention proposes a wireless operation and maintenance method based on PNP self-negotiation technology. The feeder terminal adaptively opens a wireless access point according to the wireless connection state. The wireless operation and maintenance tool periodically searches for the current wireless access point. The wireless operation and maintenance tool performs self-negotiation interaction after the wireless communication establishes a channel, obtains the parameters of all currently maintainable feeder terminal access points to establish an maintainable terminal table, and the operation and maintenance personnel select the feeder terminal to be maintained to perform local wireless operation and maintenance operations. The wireless operation and maintenance tool performs handshake connection with the selected feeder terminal according to the parameters of the maintainable terminal table, thereby realizing self-negotiation of the operation and maintenance channel of the feeder terminal, which not only ensures the security of wireless communication operation and maintenance, but also simplifies the operation and maintenance operation of the on-site feeder terminal, and the wireless operation and maintenance channel of the feeder terminal can be established without manual intervention. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention is proposed.

[0005] Therefore, the technical problem solved by the present invention is that the existing feeder terminal operation and maintenance method requires operation and maintenance personnel to climb ladders and poles for wired operation and maintenance, which has safety hazards and is inefficient. The use of wireless communication can reduce the difficulty of on-site operation and maintenance, but the power industry has high security requirements for wireless communication operation and maintenance, and the ID of the terminal wireless access point needs to be known in advance during operation and maintenance, otherwise the wireless channel cannot be established for operation and maintenance.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for wireless operation and maintenance of a feeder terminal based on PNP auto-negotiation, comprising: performing adaptive opening of a wireless access point, so that the feeder terminal is opened for a period within a fixed interval, and real-time adjustment is performed according to the time and duration of the last wireless operation and maintenance;

[0007] Establish an auto-negotiation interaction model. During the period when the wireless access point of the feeder terminal is open, when the wireless operation and maintenance tool connects to the terminal and establishes a wireless channel, the two parties conduct auto-negotiation interaction to complete the reading of device parameters.

[0008] Auto-negotiation interaction is performed, the wireless operation and maintenance tool searches for access points, establishes wireless channels, performs identity authentication and parameter verification, and opens the operation and maintenance function after success. During the operation and maintenance process, if no message from the operation and maintenance tool is received or there is no response to continuous message sending, the operation and maintenance is exited and the feeder terminal access point is searched again.

[0009] As a preferred solution of the feeder terminal wireless operation and maintenance method based on PNP auto-negotiation described in the present invention, wherein: the adaptive opening of the wireless access point includes that the terminal is set by default to open a period t0 within a fixed interval T0, and close the wireless hotspot within (T0-t0);

[0010] During the hotspot periodic opening, adaptive calculation is performed to modify the T0 and t0 parameters in real time based on the time of the last wireless operation and maintenance and the time occupied by the last wireless operation and maintenance;

[0011] The terminal records the last operation and maintenance time T in real time last , the relationship is expressed as:

[0012] T1=T cur -T last

[0013] T1 represents the time from the current moment to the last wireless operation and maintenance; T cur represents the current time, T last Indicates the time of the last wireless operation and maintenance;

[0014] When T1≤0, the wireless access point is still in the operation and maintenance state and is in the open state;

[0015] When T l When >0, there is no operation and maintenance terminal connected and the wireless access point is in a closed state.

[0016] As a preferred solution of the feeder terminal wireless operation and maintenance method based on PNP auto-negotiation described in the present invention, wherein: the adaptive opening of the wireless access point also includes that the modified wireless hotspot opening time interval is expressed as:

[0017]

[0018] Wherein, T0′ represents the corrected wireless hotspot opening time interval;

[0019] The time when the feeder terminal and the wireless operation and maintenance tool start negotiating is the feeder terminal operation and maintenance response time, and the time when the feeder terminal and the wireless operation and maintenance tool are disconnected is the operation and maintenance end time;

[0020] The feeder terminal SOE actively records the response time and end time of the last wireless operation and maintenance. Suppose the last wireless operation and maintenance cycle is t last , expressed as:

[0021] t last =t respond-last -t final-last

[0022] Among them, t last Indicates the cycle of the last wireless operation and maintenance, that is, the time occupied by the last wireless operation and maintenance; t respond-last Indicates the response time of the last wireless operation and maintenance; t final-last Indicates the end time of the last wireless operation and maintenance;

[0023] Calculate the revised wireless hotspot open time window, the formula is:

[0024]

[0025] Among them, T win represents the open time window; k represents the coefficient, which can be customized according to the engineering application conditions.

[0026] As a preferred solution of the feeder terminal wireless operation and maintenance method based on PNP auto-negotiation described in the present invention, wherein: the auto-negotiation interaction model includes an auto-negotiation interaction authentication model and a feeder terminal parameter model;

[0027] The self-negotiation interactive authentication model includes a device ID, a registration identifier, a self-negotiation model feature code, and an encrypted identity authentication code;

[0028] The feeder terminal parameter model includes a feeder terminal ID, a feeder terminal name and a feeder terminal SIM card IP;

[0029] Among them, the SM2 encryption algorithm is used on both sides of the encrypted identity authentication code to realize the two-way identity authentication of the terminal and the operation and maintenance tool.

[0030] As a preferred solution of the feeder terminal wireless operation and maintenance method based on PNP self-negotiation described in the present invention, wherein: the self-negotiation interaction includes: the wireless operation and maintenance tool searches for wireless open access points within the current range, and if multiple access points of feeder terminals are searched, the wireless operation and maintenance terminal establishes wireless channels with the terminals one by one;

[0031] After the wireless operation and maintenance terminal establishes a wireless channel with the feeder terminal, the wireless operation and maintenance terminal sends a self-registration message, and the identity authentication code is empty at this time.

[0032] As a preferred solution of the feeder terminal wireless operation and maintenance method based on PNP self-negotiation described in the present invention, wherein: the self-negotiation interaction also includes that the feeder terminal sends a negotiation message with an encrypted identity authentication code after receiving the self-registration message;

[0033] The feeder terminal signs the unique identification parameter using the SM2 national encryption algorithm, and the result is the generated terminal identity authentication code;

[0034] After receiving the negotiation message, the wireless operation and maintenance tool verifies the signature of the received identity authentication code. After the signature verification is successful, the operation and maintenance tool signs the unique identification parameter of the feeder terminal through the SM2 national secret algorithm. The signature result derives the corresponding identity authentication code, and the operation and maintenance tool fills the identity authentication code into the reply negotiation message;

[0035] The feeder terminal opens the operation and maintenance function after decrypting the identity authentication code.

[0036] As a preferred solution of the feeder terminal wireless operation and maintenance method based on PNP self-negotiation described in the present invention, wherein: the self-negotiation interaction also includes returning if the feeder terminal identity authentication fails, the wireless channel is closed after a delay of 10s, and enters the sleep state again;

[0037] After the wireless operation and maintenance tool completes the operation and maintenance, it sends a message to the feeder terminal to complete the operation and maintenance.

[0038] After receiving the end message, the feeder terminal turns off the operation and maintenance function and closes the wireless open access point;

[0039] During the operation and maintenance process, if the feeder terminal does not receive the message sent by the wireless operation and maintenance tool within 30 seconds, it will be considered that the communication is interrupted, the connection will be closed, the wireless channel will be closed after a delay of 10 seconds, and it will enter the dormant state again;

[0040] During the operation and maintenance process, if the wireless operation and maintenance tool sends three messages in succession without any response, it will immediately re-establish a wireless channel with the terminal. If the connection cannot be established, it will exit the operation and maintenance and search for the feeder terminal access point again.

[0041] A feeder terminal wireless operation and maintenance system based on PNP auto-negotiation, characterized by: comprising:

[0042] Wireless access point adaptive opening module: Performs adaptive opening of wireless access points, allowing feeder terminals to be opened for a period at fixed intervals, and makes real-time adjustments based on the time and duration of the last wireless operation and maintenance;

[0043] Auto-negotiation interaction model establishment module: establish an auto-negotiation interaction model. During the period when the wireless access point of the feeder terminal is open, when the wireless operation and maintenance tool connects to the terminal and establishes a wireless channel, the two parties conduct auto-negotiation interaction to complete the reading of device parameters.

[0044] Auto-negotiation interaction module: Auto-negotiation interaction is performed, the wireless operation and maintenance tool searches for access points, establishes wireless channels, performs identity authentication and parameter verification, and opens the operation and maintenance function after success. During the operation and maintenance process, if no message from the operation and maintenance tool is received or there is no response to continuous message sending, the operation and maintenance is exited and the feeder terminal access point is searched again.

[0045] Beneficial effects of the present invention: The present invention solves the problem of on-site feeder terminal pole climbing operation and maintenance through local wireless operation and maintenance, thereby improving the efficiency of feeder terminal operation and maintenance. Since the establishment of wireless channels requires complex parameter settings, the present invention reduces the operations of on-site operation and maintenance personnel through self-negotiation interaction, and the operation and maintenance channel establishment is completed by the operation and maintenance tools and the feeder terminal. Self-negotiation interaction comes with identity authentication encryption to ensure the security of wireless operation and maintenance. The power consumption of the feeder terminal caused by wireless operation and maintenance is reduced through the adaptive opening of the wireless access point of the feeder terminal, while reducing interference from other external wireless devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the figures required for describing the embodiments. Obviously, the figures described below are only some embodiments of the present invention. For ordinary technicians in this field, other figures can be obtained based on these figures without creative work. Among them:

[0047] Figure 1 A flow chart of a feeder terminal wireless operation and maintenance method based on PNP auto-negotiation provided in the first embodiment of the present invention;

[0048] Figure 2 An overall flow chart of wireless operation and maintenance of a feeder terminal according to a wireless operation and maintenance method of a feeder terminal based on PNP auto-negotiation provided in the first embodiment of the present invention;

[0049] Figure 3 A wireless operation and maintenance flow chart of a wireless operation and maintenance tool for a feeder terminal wireless operation and maintenance method based on PNP auto-negotiation is provided for the first embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the specification drawings. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0051] Example 1

[0052] Reference Figures 1 to 3 , is an embodiment of the present invention, and provides a feeder terminal wireless operation and maintenance method based on PNP auto-negotiation, comprising:

[0053] S1: Perform adaptive opening of wireless access points, so that feeder terminals are opened for a period at fixed intervals, and real-time adjustments are made based on the time and duration of the last wireless operation and maintenance;

[0054] To ensure security and terminal operation power consumption, during the operation of the feeder terminal, in order to reduce the power consumption of the wireless hotspot, the terminal selects the periodic opening mode. The terminal is set by default to open a period t0 within a fixed interval T0, and close the wireless hotspot within (T0-t0). At this time, the operation and maintenance tools cannot access the terminal. Compared with the normally open mode, the power consumption can be reduced to. Due to the fixed interval, the time for the operation and maintenance tools to access the terminal will be extended, and the experience is slightly worse than that of the normally open mode. Therefore, based on the hotspot periodic opening mode, adaptive calculations are performed according to the time of the last wireless operation and maintenance and the time occupied by the last wireless operation and maintenance to correct the T0 and t0 parameters in real time.

[0055] The terminal records the last operation and maintenance time T in real time last , the relationship is expressed as:

[0056] T1=T cur -T last

[0057] T1 represents the time from the current moment to the last wireless operation and maintenance; T cur represents the current time, T last Indicates the time of the last wireless operation and maintenance.

[0058] When T1≤0, the wireless access point is still in the operation and maintenance state and is in the open state.

[0059] When T l When >0, there is no operation and maintenance terminal connected and the wireless access point is in a closed state.

[0060] The corrected wireless hotspot opening time interval is expressed as:

[0061]

[0062] Wherein, T0′ represents the corrected wireless hotspot opening time interval;

[0063] The time when the feeder terminal and the wireless operation and maintenance tool start negotiating is the feeder terminal operation and maintenance response time, and the time when the feeder terminal and the wireless operation and maintenance tool are disconnected is the operation and maintenance end time. The feeder terminal SOE actively records the response time and end time of the last wireless operation and maintenance. Let the last wireless operation and maintenance cycle be t last , expressed as:

[0064] t last =t respond-last -t final-last

[0065] Among them, t last Indicates the cycle of the last wireless operation and maintenance, that is, the time occupied by the last wireless operation and maintenance; t respond-last Indicates the response time of the last wireless operation and maintenance; t final-last Indicates the end time of the last wireless operation and maintenance;

[0066] Calculate the revised wireless hotspot open time window, the formula is:

[0067]

[0068] Among them, T win represents the open time window; k represents the coefficient, which can be customized according to the engineering application conditions.

[0069] It should be noted that by adaptively adjusting the opening time and interval of the wireless access point, the operation and maintenance personnel can quickly access the terminal when needed, reduce waiting time, and improve the operation and maintenance efficiency. The periodic opening mode is adopted to close the wireless access point when no operation and maintenance is required, which greatly reduces power consumption. Compared with the always-on mode, the power consumption is significantly reduced, which prolongs the service life of the equipment. While ensuring the operation and maintenance function, the long-term opening of the wireless access point is avoided, the risk of illegal access is reduced, and the security of the system is improved.

[0070] S2: Establish an auto-negotiation interaction model. During the period when the wireless access point of the feeder terminal is open, when the wireless operation and maintenance tool connects to the terminal and establishes a wireless channel, the two parties conduct auto-negotiation interaction to complete the reading of device parameters.

[0071] The auto-negotiation interaction model includes an auto-negotiation interaction authentication model and a feeder terminal parameter model;

[0072] Auto-negotiation interactive authentication model: including device ID, registration identifier, auto-negotiation model feature code and encrypted identity authentication code. Device ID and registration identifier ensure the uniqueness and legitimacy of device identity; auto-negotiation model feature code describes the interaction characteristics to ensure the accuracy of interaction; encrypted identity authentication code uses SM2 encryption algorithm to achieve two-way identity authentication and prevent illegal device access.

[0073] Device ID: Uniquely identifies each feeder terminal to ensure that the specific device can be accurately located during the auto-negotiation interaction. The beneficial effect of this is that even if there are multiple terminals, the operation and maintenance tools can accurately identify and connect to the target device, avoiding confusion and erroneous operations.

[0074] Registration ID: Identifies the registration status of the device, ensuring that only registered devices can participate in auto-negotiation interaction. This design effectively prevents unauthorized devices from accessing and enhances the security and stability of the system.

[0075] Auto-negotiation model signature: used to describe the auto-negotiation interaction characteristics of the device, ensuring that both parties can correctly parse and process the interaction information during the interaction. The use of this signature makes the auto-negotiation process more flexible and adaptable, and can be customized according to the characteristics of different devices.

[0076] Encrypted identity authentication code: The SM2 encryption algorithm is used for two-way identity authentication to ensure the legitimacy of the identities of both parties and prevent illegal devices from accessing. Two-way authentication not only improves security, but also ensures the integrity and confidentiality of data transmission.

[0077] Feeder terminal parameter model: including feeder terminal ID, feeder terminal name and feeder terminal SIM card IP. These parameters ensure that the operation and maintenance tools can accurately identify and manage each terminal when establishing a connection and interacting with the feeder terminal.

[0078] Feeder terminal ID: uniquely identifies the feeder terminal to ensure that the specific device can be accurately located during the auto-negotiation interaction process. It enables operation and maintenance tools to accurately identify and manage multiple terminals, reducing the possibility of misoperation.

[0079] Feeder terminal name: Provides device name information for easy identification and management. The use of name information enables operation and maintenance personnel to identify devices more intuitively, reducing the time for searching and confirmation and improving work efficiency.

[0080] Feeder terminal SIM card IP: used for the communication IP address of the device to ensure that the connection can be established correctly during wireless communication. It ensures the stability and connectivity of data transmission and avoids connection problems caused by IP address confusion.

[0081] S3: Perform auto-negotiation interaction, the wireless operation and maintenance tool searches for access points, establishes wireless channels, performs identity authentication and parameter verification, and opens the operation and maintenance function after success. During the operation and maintenance process, if no message from the operation and maintenance tool is received or there is no response after continuous message sending, the operation and maintenance is exited and the feeder terminal access point is searched again. Figure 2 .

[0082] The wireless operation and maintenance tool searches for wireless open access points within the current range. If multiple access points of feeder terminals are found, the wireless operation and maintenance terminal establishes wireless channels with the terminals one by one. This process ensures that the operation and maintenance tool can find and connect to the correct access point in the shortest time, thus improving the operation and maintenance efficiency. Figure 3 .

[0083] After the wireless operation and maintenance terminal establishes a wireless channel with the feeder terminal, the wireless operation and maintenance terminal sends a self-registration message, and the identity authentication code is empty at this time.

[0084] After receiving the self-registration message, the feeder terminal sends a negotiation message with an encrypted identity authentication code. The feeder terminal signs the unique identification parameters (terminal IP, terminal ID, terminal MAC) through the SM2 national encryption algorithm, and the result is the generated terminal identity authentication code.

[0085] After receiving the negotiation message, the wireless operation and maintenance tool verifies the signature of the received identity authentication code. After the signature verification is successful, the operation and maintenance tool signs the unique identification parameters of the feeder terminal (terminal IP, terminal ID, terminal MAC) through the SM2 national secret algorithm, and the signature result derives the corresponding identity authentication code. The tool fills the identity authentication code into the reply negotiation message.

[0086] The feeder terminal opens the operation and maintenance function after decrypting the identity authentication code.

[0087] If the feeder terminal identity authentication fails, it returns, the wireless channel is closed after a delay of 10s, and enters the sleep state again.

[0088] After the wireless operation and maintenance tool completes the operation, it sends a message to the feeder terminal to complete the operation and maintenance.

[0089] After receiving the end message, the feeder terminal turns off the operation and maintenance function and closes the wireless open access point.

[0090] During the operation and maintenance process, if the feeder terminal does not receive the message sent by the wireless operation and maintenance tool within 30 seconds, it is considered that the communication is interrupted, the connection is closed, the wireless channel is closed after a delay of 10 seconds, and it enters the sleep state again.

[0091] It should be noted that 30 seconds is long enough to cover short-term network fluctuations and interference, and avoid unnecessary operation and maintenance interruptions caused by instantaneous signal instability. A certain amount of time is required for data transmission and operation during the operation and maintenance process. Failure to receive a message within 30 seconds may indicate that there is a problem with the connection and the connection needs to be reestablished. According to actual operation and maintenance experience, the 30-second time window can effectively balance response speed and network stability, ensuring that the system can take timely measures when communication is interrupted. The 10-second delay shutdown can prevent frequent switching operations and save energy, while avoiding frequent reconnections caused by short-term signal recovery. The 10-second buffer time allows the operation and maintenance tool to quickly restore the connection after a short signal interruption, reducing unnecessary re-search and connection operations. The 10-second time window has been proven to effectively prevent frequent switching operations and maintain system stability in actual operation and maintenance.

[0092] During the operation and maintenance process, if the wireless operation and maintenance tool sends three messages in succession without any response, it will immediately re-establish a wireless channel with the terminal. If the connection cannot be established, it will exit the operation and maintenance and search for the feeder terminal access point again.

[0093] It should be noted that sending three messages in a row without a response can indicate a connection problem and requires a new search and connection establishment. A single or two no responses may be a temporary network problem, while three messages without a response are more reliably considered a connection interruption. Setting a threshold of three messages can prevent false alarms caused by occasional message loss and ensure that the system only re-searches for access points when there is a real communication problem. Based on actual operation and maintenance experience, the threshold of three messages can effectively distinguish between temporary communication failures and real connection interruptions, improving system stability.

[0094] The above embodiments also include a feeder terminal wireless operation and maintenance system based on PNP auto-negotiation, specifically:

[0095] Data collection and preprocessing module: By deploying edge computing nodes near key equipment in power plants, the operating data of the equipment can be collected in real time and preprocessed.

[0096] Communication network building module: The communication network built using 5G base stations and dedicated network slicing technology enables real-time data transmission between edge computing nodes and the central monitoring system.

[0097] Predictive maintenance module: A predictive maintenance model is established through historical data and machine learning algorithms, and deployed on edge computing nodes for real-time data analysis and fault warning.

[0098] Dynamic threshold adjustment module: dynamically adjusts the fault warning threshold based on real-time data and historical data;

[0099] Early warning information transmission and fault handling module: The early warning information is transmitted to the central monitoring system in real time through the 5G network, and the corresponding fault handling process is triggered.

[0100] The computer device may be a server. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface is connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data cluster data of the power monitoring system. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a feeder terminal wireless operation and maintenance method based on PNP self-negotiation is implemented.

[0101] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0102] Example 2

[0103] As an embodiment of the present invention, a feeder terminal wireless operation and maintenance method based on PNP auto-negotiation is provided. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation / comparative experiments.

[0104] In order to verify the effectiveness of the wireless operation and maintenance method of the feeder terminal based on PNP auto-negotiation of the present invention, a series of experiments were carried out. This embodiment aims to verify the effectiveness and superiority of the wireless operation and maintenance method of the feeder terminal based on PNP auto-negotiation. The experiment used six feeder terminals, all of which had built-in Bluetooth chips and used Bluetooth hotspots as the communication method for wireless operation and maintenance. The main parameters of the experiment include fixed interval T0, open period t0, power consumption coefficients k1 and k2, and the power consumption and operation and maintenance time of each terminal in different operation and maintenance scenarios were measured.

[0105] Equipment preparation:

[0106] Six feeder terminals, numbered feeder terminal 1 to feeder terminal 6.

[0107] Configure the Bluetooth hotspot of each terminal and set the initial power consumption to 100mW.

[0108] The fixed interval T0 is set to 60 seconds, the open period t0 is set to 5 seconds, the power consumption coefficient k1 is set to 2, and k2 is set to 0.5.

[0109] Initial Measurement:

[0110] Record the power consumption of each terminal when the Bluetooth hotspot is always on.

[0111] Set the terminal's operation and maintenance mode under default parameters and record the initial power consumption before operation and maintenance begins.

[0112] Adaptive open policy application:

[0113] Start the PNP auto-negotiation technology, and the terminal will make adaptive adjustments based on the time and duration of the last operation and maintenance.

[0114] Each terminal records its last operation and maintenance response time and end time, and calculates and adjusts the revised wireless hotspot opening time interval

[0115] The open period t0 and fixed interval T0 are modified in real time to optimize power consumption and operation efficiency.

[0116] Operation and maintenance process:

[0117] The wireless operation and maintenance tool searches for open wireless access points within the current range and establishes wireless channels with the terminal one by one.

[0118] The self-registration message is sent for identity authentication, and the terminal replies with a negotiation message with an encrypted identity authentication code. Both parties perform two-way identity authentication using the SM2 national encryption algorithm.

[0119] After successful verification, the terminal opens the operation and maintenance function. After the operation and maintenance tool performs the necessary maintenance operations, it sends a message to end the operation and maintenance operation.

[0120] If no message is received during the operation and maintenance process or there is no response to continuous message sending, the system automatically exits the operation and maintenance and searches for access points again.

[0121] Data recording and analysis:

[0122] Record the average power consumption of each terminal after multiple operations and maintenance within 24 hours.

[0123] Statistics are collected on the power consumption differences and operation and maintenance time savings of each terminal before and after the adaptive open strategy is adopted.

[0124] For details, please refer to Table 1.

[0125] Table 1 Experimental data reference table

[0126]

[0127]

[0128] Through the analysis of experimental data, the following conclusions can be drawn:

[0129] Significantly reduced power consumption:

[0130] Before the implementation of PNP auto-negotiation technology, the power consumption of the Bluetooth hotspot of each feeder terminal was 100mW. After the adaptive open strategy was adopted, the average power consumption of each terminal was significantly reduced, with the highest power consumption reduced to 18mW and the lowest power consumption reduced to 22mW, and the average power consumption was about 20mW.

[0131] This power consumption reduction not only reduces energy consumption, but also extends the service life of terminal equipment, with significant energy-saving effects.

[0132] Significant savings in operation and maintenance time:

[0133] The traditional operation and maintenance method requires two pole climbings, each time taking about 30 minutes. After adopting the wireless operation and maintenance method of the present invention, the operation and maintenance time is saved by about 30 minutes on average, with the maximum saving being 35 minutes and the minimum being 27 minutes.

[0134] This time saving is mainly due to the application of the self-negotiation interaction model, which eliminates the need for operation and maintenance personnel to repeatedly climb poles and can complete most operation and maintenance tasks through wireless communication, greatly improving operation and maintenance efficiency.

[0135] System reliability enhancement:

[0136] During the operation and maintenance process, the system can automatically handle communication interruptions. If no message is received for 30 consecutive seconds or three messages are sent without a response, the system will automatically exit the operation and maintenance and search for access points again. This mechanism effectively avoids operation and maintenance failures caused by short-term communication interruptions and improves system reliability.

[0137] Two-way identity authentication and parameter verification are performed through the SM2 national encryption algorithm, ensuring the communication security between operation and maintenance tools and terminals, and preventing illegal device access and data theft.

[0138] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A wireless operation and maintenance method for a feeder terminal based on PNP auto-negotiation, characterized in that: include: Perform adaptive opening of wireless access points, so that feeder terminals are opened for a period at fixed intervals, and real-time adjustments are made based on the time and duration of the last wireless operation and maintenance; Establish an auto-negotiation interaction model. During the period when the wireless access point of the feeder terminal is open, when the wireless operation and maintenance tool connects to the terminal and establishes a wireless channel, the two parties conduct auto-negotiation interaction to complete the reading of device parameters. Auto-negotiation interaction is performed, the wireless operation and maintenance tool searches for access points, establishes wireless channels, performs identity authentication and parameter verification, and opens the operation and maintenance function after success. During the operation and maintenance process, if no message from the operation and maintenance tool is received or there is no response to continuous message sending, the operation and maintenance is exited and the feeder terminal access point is searched again.

2. The feeder terminal wireless operation and maintenance method based on PNP auto-negotiation according to claim 1, characterized in that: The adaptive opening of the wireless access point includes that the terminal sets by default a fixed interval T0 to open a period t0, and closes the wireless hotspot within (T0-t0); During the hotspot periodic opening, adaptive calculation is performed to modify the T0 and t0 parameters in real time based on the time of the last wireless operation and maintenance and the time occupied by the last wireless operation and maintenance; The terminal records the last operation and maintenance time T in real time last , the relationship is expressed as: T1=T cur -T last T1 represents the time from the current moment to the last wireless operation and maintenance; T cur represents the current time, T last Indicates the time of the last wireless operation and maintenance; When T1≤0, the wireless access point is still in the operation and maintenance state and is in the open state; When T l When >0, there is no operation and maintenance terminal connected and the wireless access point is in a closed state.

3. The feeder terminal wireless operation and maintenance method based on PNP auto-negotiation according to claim 2, characterized in that: The adaptive opening of the wireless access point also includes that the modified wireless hotspot opening time interval is expressed as: Wherein, T0′ represents the corrected wireless hotspot opening time interval; The time when the feeder terminal and the wireless operation and maintenance tool start negotiating is the feeder terminal operation and maintenance response time, and the time when the feeder terminal and the wireless operation and maintenance tool are disconnected is the operation and maintenance end time; The feeder terminal SOE actively records the response time and end time of the last wireless operation and maintenance. Suppose the last wireless operation and maintenance cycle is t last , expressed as: t last =t respond-last -t final-last Among them, t last Indicates the cycle of the last wireless operation and maintenance, that is, the time occupied by the last wireless operation and maintenance; t respond-last Indicates the response time of the last wireless operation and maintenance; t final-last Indicates the end time of the last wireless operation and maintenance; Calculate the revised wireless hotspot open time window, the formula is: Among them, T win represents the open time window; k represents the coefficient, which can be customized according to the engineering application conditions.

4. The feeder terminal wireless operation and maintenance method based on PNP auto-negotiation according to claim 3, characterized in that: The self-negotiation interaction model includes a self-negotiation interaction authentication model and a feeder terminal parameter model; The self-negotiation interactive authentication model includes a device ID, a registration identifier, a self-negotiation model feature code, and an encrypted identity authentication code; The feeder terminal parameter model includes a feeder terminal ID, a feeder terminal name and a feeder terminal SIM card IP; Among them, the SM2 encryption algorithm is used on both sides of the encrypted identity authentication code to realize the two-way identity authentication of the terminal and the operation and maintenance tool.

5. The feeder terminal wireless operation and maintenance method based on PNP auto-negotiation according to claim 4, characterized in that: The self-negotiation interaction includes the wireless operation and maintenance tool searching for wireless open access points within the current range, and if multiple access points of feeder terminals are found, the wireless operation and maintenance terminal establishes wireless channels with the terminals one by one; After the wireless operation and maintenance terminal establishes a wireless channel with the feeder terminal, the wireless operation and maintenance terminal sends a self-registration message, and the identity authentication code is empty at this time.

6. The feeder terminal wireless operation and maintenance method based on PNP auto-negotiation according to claim 5, characterized in that: The self-negotiation interaction further includes, after receiving the self-registration message, the feeder terminal sends a negotiation message with an encrypted identity authentication code; The feeder terminal signs the unique identification parameter using the SM2 national encryption algorithm, and the result is the generated terminal identity authentication code; After receiving the negotiation message, the wireless operation and maintenance tool verifies the signature of the received identity authentication code. After the signature verification succeeds; The operation and maintenance tool signs the unique identification parameter of the feeder terminal using the SM2 national secret algorithm. The signature result derives the corresponding identity authentication code, and the operation and maintenance tool fills the identity authentication code into the reply negotiation message; The feeder terminal opens the operation and maintenance function after decrypting the identity authentication code.

7. The feeder terminal wireless operation and maintenance method based on PNP auto-negotiation according to claim 6, characterized in that: The self-negotiation interaction also includes returning if the identity authentication of the feeder terminal fails, closing the wireless channel after a delay of 10 seconds, and entering the dormant state again; After the wireless operation and maintenance tool completes the operation and maintenance, it sends a message to the feeder terminal to complete the operation and maintenance. After receiving the end message, the feeder terminal turns off the operation and maintenance function and closes the wireless open access point; During the operation and maintenance process, if the feeder terminal does not receive the message sent by the wireless operation and maintenance tool within 30 seconds, it will be considered that the communication is interrupted, the connection will be closed, the wireless channel will be closed after a delay of 10 seconds, and it will enter the dormant state again; During the operation and maintenance process, if the wireless operation and maintenance tool sends three messages in succession without any response, it will immediately re-establish a wireless channel with the terminal. If the connection cannot be established, it will exit the operation and maintenance and search for the feeder terminal access point again.

8. A feeder terminal wireless operation and maintenance system based on PNP auto-negotiation using the method according to any one of claims 1 to 7, characterized in that: Wireless access point adaptive opening module: Performs adaptive opening of wireless access points, allowing feeder terminals to be opened for a period at fixed intervals, and makes real-time adjustments based on the time and duration of the last wireless operation and maintenance; Auto-negotiation interaction model establishment module: establish an auto-negotiation interaction model. During the period when the wireless access point of the feeder terminal is open, when the wireless operation and maintenance tool connects to the terminal and establishes a wireless channel, the two parties conduct auto-negotiation interaction to complete the reading of device parameters. Auto-negotiation interaction module: Auto-negotiation interaction is performed, the wireless operation and maintenance tool searches for access points, establishes wireless channels, performs identity authentication and parameter verification, and opens the operation and maintenance function after success. During the operation and maintenance process, if no message from the operation and maintenance tool is received or there is no response to continuous message sending, the operation and maintenance is exited and the feeder terminal access point is searched again.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

Images