Network enhancement system and method applied to electric power

Abstract

The invention provides a network enhanced connection system and method applied to electric power, and belongs to the technical field of electric power communication. Comprising a dual-mode communication terminal, a wireless public network, a wireless local area network and a power integrated data network, the dual-mode communication terminal is provided with a dual-mode communication module which is used for establishing dual-mode connection with a wireless public network and a wireless local area network and accessing the power integrated data network through the wireless public network or the wireless local area network; the dual-mode communication module comprises an SOC subsystem and is used for realizing network switching between a wireless public network and a wireless local area network. On the basis of single network connection, another backup communication channel is added, dual-mode connection is supported, service is guaranteed not to be interrupted, and network seamless roaming is supported. And meanwhile, non-perceptual dynamic switching and combination of the wireless public network and the wireless local area network are realized through the SOC subsystem, so that uninterrupted high-speed internet access can be ensured, delay is reduced to the greatest extent, and bandwidth efficiency is improved to the greatest extent.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power communication, and in particular to a network enhancement system and method applied to electric power. Background Art

[0002] At present, the State Grid and China Southern Power Grid have deployed secure and reliable wireless LANs (i.e., WAPI wireless LANs) in substations and distribution rooms with fiber optic access. The communication terminal devices used by the power industry can access the encrypted WAPI wireless LAN without using the operator's public network (2G / 3G / 4G / 5G), thereby saving traffic fees and ensuring data security. However, the coverage of the WAPI wireless LAN deployed by the power industry is limited. Power workers need to have data communication online throughout the inspection process. Therefore, the communication terminal devices need to support both the operator's public network and the power-specific WAPI wireless LAN connection at the same time, so as to ensure that the communication terminal devices are away from the area covered by the WAPI wireless LAN when moving, and can switch to the operator's public network to continue data communication and prevent communication disconnection. However, the current power communication terminal devices will be disconnected when switching between the operator's public network and the WAPI wireless LAN, and business continuity cannot be guaranteed. Summary of the invention

[0003] In view of this, the present invention provides a network enhancement system and method for electric power to solve the technical problem that the existing terminal equipment is disconnected when switching between the electric power dedicated wireless local area network and the operator's public network, and the business continuity cannot be guaranteed.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A network enhanced connection system applied to electric power, comprising a dual-mode communication terminal, a wireless public network, a wireless local area network and an electric power integrated data network; the dual-mode communication terminal is provided with a dual-mode communication module for establishing a dual-mode connection with the wireless public network and the wireless local area network, and accessing the electric power integrated data network through the wireless public network or the wireless local area network; the dual-mode communication module comprises a SOC subsystem for realizing network switching between the wireless public network and the wireless local area network.

[0005] Preferably, the dual-mode communication module also includes a 4 / 5G communication module, a WiFi communication module and a terminal communication interface; the SOC subsystem is simultaneously communicated with the 4 / 5G communication module and the WiFi communication module to achieve simultaneous connection to the wireless public network and the wireless local area network; the SOC subsystem communicates with the dual-mode communication terminal through the terminal communication interface.

[0006] Preferably, the 4 / 5G communication module includes a 4 / 5G baseband chip, the WiFi communication module includes a WiFi baseband chip, and a state perception interface is provided between the 4 / 5G baseband chip and the WiFi baseband chip.

[0007] Preferably, the status perception interface includes a public network baseband subsystem network connection status indication pin, a public network baseband subsystem communication status indication pin, a Wi-Fi baseband subsystem network connection status indication pin, and a Wi-Fi baseband subsystem communication status indication pin.

[0008] Preferably, the network enhanced connection system applied to electricity also includes a communication management platform, and the integrated power data network includes a front-end machine and a business management platform; the communication management platform is communicatively connected to the business management platform, and the dual-mode communication terminal establishes a connection with the business management platform through the communication management platform to access the data of the business management platform.

[0009] Preferably, the business management platform includes multiple business systems, the multiple business systems are uniformly connected to the front-end processor, and communicate indirectly with the communication management platform through the front-end processor.

[0010] The present invention also provides a network enhanced connection method for electric power, using the network enhanced connection system for electric power as described above, comprising the following steps: S10, SOC subsystem scans available wireless public networks and wireless local area networks in real time; S20, selecting the best backup network and establishing a connection; S30, SOC subsystem monitors the signal strength and link margin changes of the main network in real time; S40. The SOC subsystem performs network switching based on changes in signal strength and link margin.

[0011] Preferably, in step S40, performing network switching based on changes in signal strength and link margin includes the following steps: S41, judging whether the signal strength and link margin change are lower than the safety threshold, and judging the flow limit at the same time; S42, if the signal strength and link margin change are lower than the safety threshold, or the traffic exceeds the limit, synchronize the network data frame MAC address, socket sequence number, and frame sequence number; S43: Switch the main network to the optimal backup network for data transmission.

[0012] Preferably, the method further comprises: S44, if the signal strength and link margin changes are higher than the safety threshold and the traffic is normal, then determine network congestion; S45, if network congestion occurs, dual-mode link aggregation is performed; S46, performing load balancing judgment to determine whether the network load is abnormal; S47. If the network load is abnormal, perform load balancing adjustment.

[0013] Preferably, in step S2, selecting the optimal backup network and establishing a connection includes the following steps: S21, the SOC subsystem sorts the demodulatable broadcast signals according to signal quality from high to low; S22, initiating network access requests to the network in the sorted order and establishing a network connection. Compared with the prior art, the present invention has the following beneficial effects: Dual-mode communication terminals traditionally only support operators' public 4 / 5G networks or power-specific wireless LANs, and add Wi-Fi hotspot network connections to support Internet public channels to connect to the power integrated data network. On the basis of a single network connection, additional backup communication channels are added to support dual-mode connections to ensure uninterrupted business and seamless network roaming. At the same time, the SOC subsystem realizes non-perceptual dynamic switching and combines wireless public networks and wireless LANs, which can ensure uninterrupted high-speed Internet access, minimize latency and maximize bandwidth efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the communication network.

[0015] Figure 2 This is the structural diagram of the dual-mode communication module.

[0016] Figure 3 This is a schematic diagram of the baseband interconnect subsystem synchronization interface.

[0017] Figure 4 Schematic diagram of the communication network architecture.

[0018] Figure 5 A flow chart is created for the communication connection.

[0019] Figure 6 It is a schematic diagram of the method flow of the present invention.

[0020] Figure 7 The present invention is another method flow chart.

[0021] Figure 8 This is a schematic diagram of the connection status switching process. DETAILED DESCRIPTION

[0022] The technical solutions and technical effects of the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings of the present invention.

[0023] Please see Figure 1, a network enhanced connection system applied to electric power, including dual-mode communication terminal, wireless public network, wireless local area network and electric power integrated data network; the dual-mode communication terminal is provided with a dual-mode communication module for establishing dual-mode connection with wireless public network and wireless local area network, and accessing electric power integrated data network through wireless public network or wireless local area network; the dual-mode communication module includes SOC subsystem for realizing network switching between wireless public network and wireless local area network. Among them, wireless local area network includes electric power dedicated wireless local area network and public wireless local area network, public wireless local area network is urban Wi-Fi hotspot, and wireless public network is operator public network 4 / 5G.

[0024] like Figure 1 As shown, the dual-mode communication terminal can establish a connection with the power-specific wireless LAN to access the power integrated data network, or establish a connection with the operator's public network 4 / 5G to access the power integrated data network, and can also establish a connection with the city's WiFi hotspot to access the power integrated data network through the Internet. On the basis of the traditional support for only the operator's public network 4 / 5G or the power-specific wireless LAN, the dual-mode communication terminal adds Wi-Fi hotspot network connection and supports the Internet public channel to connect to the power integrated data network. On the basis of a single network connection, an additional backup communication channel is added to support dual-mode connection, ensure uninterrupted business, and support seamless network roaming. At the same time, the SOC subsystem realizes imperceptible dynamic switching and combines wireless public networks and wireless LANs, which can ensure uninterrupted high-speed Internet access, minimize latency and maximize bandwidth efficiency.

[0025] In some embodiments, the dual-mode communication terminal includes a fixed-position power terminal and a mobile terminal, wherein the fixed-position power terminal includes FTU, DTU, fusion terminal, concentrator, special transformer terminal, electric meter, smart switch, IPC camera. Mobile terminals include mobile operation terminals, mobile phones, tablets, control balls, smart helmets, law enforcement recorders, inspection robots, drones, robot dogs and other power terminal products that can use dual-mode communication modules.

[0026] Please see again Figure 1 , where the components of the communication network diagram are described as follows: Electric power integrated data network: The power system is divided into four major areas in total. Different from the production control area (Area I, Area II) and the management information area (Area III, Area IV) of the power system, the electric power integrated data network is also called the Internet area. It is used to connect to the external public Internet. Networks outside the power system can only exchange information through the electric power integrated data network, and internal information can only be sent out through the electric power integrated data network. It is the front line of defense against Internet attacks.

[0027] Internet: The Internet in the traditional sense is the public network, which is accessible to computers / servers.

[0028] Operator public network 4G / 5G: mobile operator network accessible by mobile phones / tablets / mobile communication terminals. China has four major public network operators, namely China Mobile / China Telecom / China Unicom / China Broadcasting and Television, providing mobile access network services. Operators have their own core network / dispatching network / data network, which can provide network services to the outside world and manage access terminals. The data export is the Internet, and they can provide dedicated APN / VPN channels for government and enterprise customers, also known as enterprise virtual private networks.

[0029] Power-specific wireless LAN: A regional enterprise wireless LAN independently built and operated by the power company based on its own communication equipment. It is mainly used for wireless LAN coverage in power places, different from home networks. Enterprise wireless SSID numbers are managed in a standardized manner and support regional / city / provincial roaming.

[0030] City Wi-Fi hotspot: A public wireless hotspot built by a city / district / county that provides free wireless access network services to the public.

[0031] Dual-mode communication terminal: A business terminal with wireless public network / wireless LAN access function, generally with built-in dual-mode communication modules and modules. The module is embedded and integrated on the business terminal motherboard, while the communication module is pluggable.

[0032] For further information, see Figure 2 The dual-mode communication module also includes a 4 / 5G communication module, a WiFi communication module and a terminal communication interface; the SOC subsystem is simultaneously connected to the 4 / 5G communication module and the WiFi communication module to achieve simultaneous connection to the wireless public network and the wireless local area network; the SOC subsystem communicates with the dual-mode communication terminal through the terminal communication interface.

[0033] At the dual-mode communication module level, the present invention improves the traditional 4 / 5G communication module and Wi-Fi communication module, and merges the northbound interface with the service terminal into one, that is, the SOC subsystem is used to host the protocol docking work with the user terminal, and is compatible with the 4 / 5G communication module and the Wi-Fi communication module. The dual-mode communication module can directly replace the existing support for any 4 / 5G communication module and Wi-Fi communication module / module, without modifying the driver interface program of the user terminal, and the non-perceiving channel is changed from single-mode 4 / 5G and Wi-Fi to dual-mode connection, which can be connected to the wireless public network and the wireless local area network at the same time in the north, so that the dual-mode communication terminal can be connected to the wireless public network and the wireless local area network at the same time. In addition, the dual-mode communication module shares the same external southbound communication interface, that is, it only occupies one terminal communication interface, which is one less interface than the traditional terminal perception 2 modules, thereby saving hardware resources, one less set of communication interface protocols, and reducing the software development workload on the client side. The terminal communication interface is a communication interface of a general terminal module, including USB, PCIE, UART, such as any one of USB, serial port, bus port, etc.

[0034] Furthermore, the SOC subsystem hosts an external switching driver interface, which can directly replace any 4 / 5G communication module or Wi-Fi module of existing products with plug-in, support smooth transition and upgrade of existing stock products, without modifying the power terminal software and hardware. The SOC subsystem is a central control unit that can monitor the signal strength, link margin, data usage and network congestion of the communication module in real time. It provides driver interface and protocol conversion functions for the southbound connection terminal, and manages the dual-mode module in the northbound direction, providing network status collection, data forwarding, packetization, network switching control, load balancing, carrier aggregation and other functions. In addition, the SOC subsystem has a built-in predefined algorithm for determining the best network switching (5G or Wi-Fi) and a control switching protocol agreed upon by the remote communication platform. According to the channel monitoring status and business communication status (such as signal strength, current bandwidth usage and delay requirements), it dynamically selects single / dual channels, seamlessly switches network channels, does not lose data, and the business platform does not perceive changes in network connection status. According to the algorithm, the SOC subsystem can packetize / frame the business terminal data packets and send them from the dual channels at the same time to achieve the functions of load balancing and smooth transition of channel switching.

[0035] In some embodiments, Figure 2 As shown, the 4 / 5G communication module includes a 4 / 5G baseband chip, an RF transceiver, a FEM front end, and an RF connector / antenna. The WiFi communication module includes a WiFi baseband chip, an RF transceiver, a FEM front end, and an RF connector / antenna. Among them, the 4 / 5G baseband chip includes complete physical layer coding, decoding, modulation, demodulation, and data link layer / application layer protocols, and synchronously controls the peripheral switches to achieve transceiver channel frequency band switching, which is used to access base stations and operator networks. The WiFi baseband chip includes complete physical layer coding, decoding, modulation, demodulation, and data link layer / application layer protocols, and synchronously controls the peripheral switches to achieve transceiver channel frequency band switching, which is used to access enterprise wireless LANs or home wireless networks, and urban public Wi-Fi hotspots. The RF transceiver is used to convert the digital transceiver signals of the baseband subsystem into analog radio electromagnetic wave signals. The FEM front end is used for built-in PA RF amplifiers, LNA low noise amplifiers, and RF switches for transceiver signal amplification and antenna switching. RF connector / antenna is used for coaxial connector or onboard antenna, supports external antenna or onboard antenna connection, transmits electromagnetic waves into the air, provides impedance matching and conversion functions, and transmits and receives radio signals.

[0036] In some embodiments, the 4 / 5G communication module includes a 4 / 5G baseband chip, the WiFi communication module includes a WiFi baseband chip, and a state perception interface is provided between the 4 / 5G baseband chip and the WiFi baseband chip.

[0037] The SOC subsystem manages the 4 / 5G baseband chip and the WiFi baseband chip at the same time. The baseband chip only completes the encoding and decoding work. In addition, an additional state perception interface is added between the sensing 4 / 5G communication module and the Wi-Fi communication module to support real-time status updates between the communication module subsystems, thereby reducing the delay caused by CPU query synchronization, further improving the real-time response of the network connection, realizing network switching without waiting, and reducing communication process disconnections. The two communication modules directly use the existing network configuration parameters / MAC address / Socket socket / frame number, without the need to re-establish the network connection, and the business platform is unaware of the network communication switch.

[0038] For further information, see Figure 3 The status perception interface includes the public network baseband subsystem network connection status indication pin 1 Connection break, the public network baseband subsystem communication status indication pin 2 Busy / Idle, the Wi-Fi baseband subsystem network connection status indication pin 3 Connection break, and the Wi-Fi baseband subsystem communication status indication pin 4 Busy / Idle. Among them, the public network baseband subsystem network connection status indication pin defaults to a low level, and a high level represents a disconnection. It is used for dual-mode connection trigger signals to sense all control frames / management frames in the wireless air. It is not limited to communication frame messages related to its own communication, and distinguishes between periodic query feedback and abnormal feedback of the SOC subsystem application layer data frame, with a smaller response delay. The high level of the public network baseband subsystem communication status indication pin represents communication, and the low level represents idle state, which is used for dual-mode network switching state identification. The Wi-Fi baseband subsystem network connection status indication pin is low level by default, and high level indicates disconnection. It is used for dual-mode connection trigger signals, and senses all control frames / management frames abnormal in the wireless air, not limited to communication frame messages related to its own communication, distinguishes periodic query feedback and abnormal feedback of SOC subsystem application layer data frames, and has a smaller response delay. The high level of the Wi-Fi baseband subsystem communication status indication pin indicates communication, and the low level indicates idle state, which is used for dual-mode network switching state identification.

[0039] Existing devices do not have interfaces for such network coexistence. They are all based on the perception state switching of business terminal application software or system. Application APP will appear stuck / disconnected / re-established connection process, and there are defects in compatibility and real-time performance. The user level can perceive the network state change and switching process. For business applications with poor compatibility, it directly causes network communication interruption and cannot be restored, requiring manual intervention. By adding a state perception interface, the public network baseband subsystem and Wi-Fi baseband subsystem can sense the receiving / idle state in real time, which is used for network switching and carrier aggregation synchronous receiving and transmitting. At the same time, communication and idle high and low level IO recognition and rising edge ready trigger signal recognition are added for two-way synchronization to improve synchronization accuracy. Busy / Idle high and low level changes can sense whether it is currently in communication state. Connection break can sense that the 4 / 5G / Wi-Fi network connection data link layer has been disconnected, triggering another section to quickly complete random access, meet the conditions for network channel connection establishment, and reduce latency.

[0040] In some embodiments, see Figure 4 , the network enhanced connection system applied to power also includes a communication management platform, and the power integrated data network includes a front-end machine and a business management platform; the communication management platform is connected to the business management platform in communication, and the dual-mode communication terminal establishes a connection with the business management platform through the communication management platform to access the data of the business management platform. Specifically, at the communication network architecture level, the communication management platform and the channel management layer control protocol are added. The communication management platform manages the network access authentication, configuration parameters, network status monitoring, communication mode switching and other network-side functions of the dual-mode communication network through the built-in network management protocol. There is no perception of changes on the communication network side, which does not affect any function of the business management platform. The dual-mode communication module can be remotely OTA upgraded by the communication management platform without the participation of the user side. Furthermore, through the improved dual-mode transceiver communication module and the communication management platform, the business data flow and the control management flow are separated, the network management and business data communication are in parallel, and the user side controls the channel switching without feeling.

[0041] Among them, the communication management platform implements dedicated control management for mobile terminal access to facilitate traffic management, security management, file management, identity authentication, network parameter management, upgrades, system operation parameter configuration, etc. of access equipment. It mainly carries network control data frames and does not process business data messages. Dual-mode communication modules / modules generally have separate background processes / threads to connect to the communication management platform to complete connection authentication requests, identity authentication, network status collection and monitoring, and network status switching control. The front-end refers to the connection server of the target IP and port of the power business system. In order to support business expansion, protocol conversion, equipment management, and load balancing, the business system generally distinguishes between the network access front end and the data processing middle platform and business system to achieve hierarchical management. The front-end is responsible for real-time interactive business and data transfer services, and provides a public service interface to the upper-level business system, which can be shared by multiple business systems.

[0042] Furthermore, the business management platform includes multiple business systems, which are uniformly connected to the front-end processor and communicate indirectly with the communication management platform through the front-end processor. Figure 4 As shown, multiple business systems include business systems 1~N. Electricity has many business management systems according to profession and purpose, such as marketing system, new load management system, distribution automation system, dispatching system, unified video monitoring platform, etc.

[0043] In some embodiments, at the communication network architecture level, the system of the present invention also includes a cryptographic service management platform, which is a unified cryptographic service management platform and a unified cryptographic certificate issuance platform for the power management information area (area III, area IV) / Internet area.

[0044] In some embodiments, the dual-mode communication terminal is first connected to the communication management platform through the dual-mode communication module before going online, and the network connection of the service management platform is initiated after the legal identity authentication is completed. The communication management platform and the service management platform are dual-connected. Among them, the communication connection establishment process between the dual-mode communication terminal and the communication management platform and the service management platform includes: the dual-mode communication terminal completes the status check of all peripheral interfaces after booting up, and the network connection request can be initiated without hardware failure. The actual network connection establishment and legal identity network access authentication are completed by the dual-mode communication module. The user side cannot perceive the real-time process of the current network connection and can only return the final connection result. Common types of fault codes include network registration failure, no available network at present, illegal identity authentication, and request connection timeout. After the network request connection is initiated, the dual-mode communication module normally initiates a network random access request. Generally, two processes are established, the communication management process and the service data communication process. After the communication management process completes the identity authentication and parameter configuration, the service data communication process is allowed to initiate and establish the network connection of the service management platform. The user side receives the return status information of successful communication establishment, and can start normal business-level data communication.

[0045] For details, please see Figure 5 The dual-mode communication terminal communication connection establishment process includes the following steps: 101: The dual-mode communication terminal initiates a communication connection request. After the dual-mode communication terminal is powered on, it completes all peripheral interface status checks and initiates a communication connection request if there is no hardware failure; or wakes up from sleep mode and needs to start communication, calls the driver interface, and initiates a network connection process.

[0046] 102: After receiving the communication request from the terminal, the SOC subsystem queries the dual-mode network status, scans the spectrum in the air, demodulates the wireless signal in the air, identifies the demodulated wireless information, and searches for wireless public network services / wireless local area network services, thereby confirming the existence of the network before establishing a connection.

[0047] 103: Whether the network is available is determined, and the accessible network is identified according to the wireless public network SIM card and the built-in wireless local area network parameters to form a network access sequence list. Specifically, from the perspective of the operator, the card or tariff of the dual-mode communication terminal supports a certain operator, that is, the corresponding operator is selected. For example, when scanning the air frequency band, it is found that there is a mobile operator public network and a telecommunications operator public network, and the card used by the dual-mode communication terminal is a mobile operator, then the mobile operator public network is an available network and can be accessed. The dual-mode communication terminal can also support multiple frequency bands, and the multiple supported frequency bands are sorted to form a network access sequence list. In the case of a wireless local area network, there are generally multiple hotspots, and the dual-mode communication terminal will sort according to the signal, and sort from high to low according to the signal quality to form a network access sequence list.

[0048] 104: Select an available network to initiate a random access request. After obtaining the network access sequence list, start requesting to establish a network connection in sequence according to the sequence list.

[0049] 105: Network connection establishment result judgment. When the network connection is established successfully, the success code is returned, and the next state connection can be made. Otherwise, the available network is reselected from the sequence list to initiate the connection. When all attempts in the sequence list are completed, the identification code is returned, and the network service is refused. Please contact the network service provider for information.

[0050] 106: Initiate a connection to the communication management platform. After the access layer network channel is established, a network connection request to the communication management platform is initiated according to the built-in communication management platform IP and port. If the number of attempts exceeds the limit, a timeout error is displayed.

[0051] 107: Determine the result of establishing the network connection. The communication management platform determines whether the dual-mode communication terminal is a legitimate communication terminal based on the managed IMEI file. If it is a legitimate communication terminal, the communication management platform receives the network connection request and returns a success code to complete the handshake exchange communication. Otherwise, request the communication management platform for network connection again.

[0052] 108: The communication management platform connection is established. The terminal network communication status information is read, the network configuration parameters are issued, and the identity authentication process is allowed to enter.

[0053] 109: Initiate an identity authentication request. The communication management platform sends an identity authentication message with the encrypted chip serial number / MAC address according to the authentication protocol.

[0054] 110: Determination of identity authentication result. The communication management platform authenticates the legal identity of the dual-mode communication terminal according to the format of the encryption chip. If it is legal, the MAC address information is recorded to complete the binding of the MAC address and the encryption chip. Otherwise, it returns that the identity authentication is illegal and rejects the network access request.

[0055] 111: Returns the connection request error code. If the identification is illegal, the communication management platform returns the identification error code, and the dual-mode module records the error code information. If the terminal tries to connect again, it directly returns the identity is illegal, and asks the connection module provider to register the encryption chip or SIM card information.

[0056] 112: Connection request ends. The dual-mode communication module returns an error code to the terminal and stops the network access request.

[0057] 113: Initiate a connection to the business management platform. If the identity is authenticated as legitimate, the communication management platform will synchronize the legitimate MAC address information and valid connection delay to the target business system front-end, and return the identity authentication information. The SOC subsystem of the dual-mode communication module initiates a connection to the business platform, and the module must complete it within the specified time, where the specified time is determined according to the network status and communication delay, generally 0.1-5s.

[0058] 114: Network connection establishment result judgment. After receiving the network connection request, the business management platform front-end determines whether the MAC address and the current time stamp are legal. If legal, it passes the connection request and returns a connection success status information code. Otherwise, the connection is rejected. The dual-mode communication module can continue to try to connect for the maximum number of times.

[0059] 115: The business management platform connection is established. After the network connection request is authenticated and legal, the dual-mode communication module and the business system front-end establish a network connection and maintain a periodic heartbeat.

[0060] Please see Figure 6The present invention also provides a network enhanced connection method for electric power, using the network enhanced connection system for electric power as described above, comprising the following steps: S10. The SOC subsystem scans the available wireless public networks and wireless local area networks in real time. Specifically, the SOC subsystem scans the available 4 / 5G / Wi-Fi networks in the surrounding area in real time, and scans the public network broadcast signals and wireless local area network broadcast signals of the designated operator in the full frequency band.

[0061] S20, select the best backup network and establish a connection; sort the available wireless public networks or wireless local area networks from high to low according to signal quality, and use the network with the highest signal quality as the best backup network for connection establishment. If the network with the highest signal quality fails to connect successfully, select the next network in the sorting order for connection establishment; if the network connection is successful, the network is used as the final best backup network.

[0062] S30, the SOC subsystem monitors the signal strength and link margin changes of the main network in real time; specifically, it scans the signal strength of the communication channel of the main network, records the RSSI signal strength of the demodulated data frame, management frame, and control frame; at the same time, it obtains the minimum receiving sensitivity value, and determines the link margin changes of the main network based on the signal strength and the minimum receiving sensitivity value.

[0063] S40, the SOC subsystem switches the network based on the signal strength and link margin changes. Specifically, when the signal strength and link margin changes of the main communication channel are lower than the safety threshold, the SOC subsystem switches the main network to the optimal backup network. Among them, the safety threshold is the safety link margin value, which can be designed to be 6dB. Subtract the current signal strength from the minimum receiving sensitivity value. If the difference is lower than the safety threshold, that is, lower than 6dB, it is necessary to switch the network and switch the main network to the optimal backup network.

[0064] The SOC subsystem scans the available wireless public networks and wireless LANs in real time, determines the optimal backup network based on the signal strength to establish a network connection, and monitors the signal strength and link margin changes of the main network in real time; when the signal strength and link margin changes of the main network are lower than the safety threshold, the main network is switched to the optimal backup network. The SOC subsystem first establishes a dual-mode connection and then switches the network, so that dynamic and imperceptible switching can be performed between the wireless public network, the power-specific wireless LAN, and the Wi-Fi city hotspot to ensure a stable connection.

[0065] In the specific implementation process, please refer to Figure 7 In step S40, performing network switching based on changes in signal strength and link margin includes the following steps: S41, determine whether the signal strength and link margin change are lower than the safety threshold, and perform flow limit judgment at the same time; according to the real-time recorded frame signal strength value, use the current signal strength minus the minimum receiving sensitivity value, if the difference is lower than the safety threshold, then go to step 42. If using a public network signal, add a flow limit judgment, if the flow exceeds the limit, then go to step 42, otherwise go to step 44.

[0066] S42. If the signal strength and link margin change is lower than the safety threshold, or the traffic exceeds the limit, the network data frame MAC address, SOCKET sequence number, and frame sequence number are synchronized; when the signal strength and link margin change is lower than the safety threshold, or the traffic exceeds the limit, that is, after the SOC subsystem senses the change in network status, the network data frame MAC address, SOCKET sequence number, and frame sequence number in the SOC subsystem thread are synchronized for subsequent data frame information sending.

[0067] S43, switch the main network to the optimal backup network for data transmission. After the backup network connection request is established, the SOC subsystem switches the transmission channel, suspends the current thread connection, switches to the backup channel thread, starts data transmission, and returns a successful switching result, and enters step S10.

[0068] S44, if the signal strength and link margin change are higher than the safety threshold and the traffic is normal, the network congestion is judged; specifically, by scanning the available networks and frequency bands in the air, it is judged whether the current rate reaches the theoretical communication rate of the time slot / spectrum allocation. If it is lower than the typical value, it is judged as network congestion, and the dual-mode link aggregation process is entered according to the preset parameters and strategies. If there is no abnormality, it returns to step S10.

[0069] S45. If network congestion occurs, dual-mode link aggregation is performed; wherein, dual-mode link aggregation is to share network parameters through dual-mode communication transceiver threads, use dual channels to send and receive network data, thereby increasing the bandwidth of the link, improving the stability of the link, and providing a unified and enhanced connection. Therefore, in scenarios requiring high data throughput, the SOC subsystem can combine the bandwidth of the wireless public network and the wireless LAN to provide a unified and enhanced connection, and in multi-APP application scenarios, it can support multiple connections of data, voice, and video at the same time.

[0070] S46. Perform load balancing judgment to determine whether the network load is abnormal; the SOC subsystem counts the received and sent data in the wireless public network band / wireless local area network band and calculates the network load difference. If it exceeds the preset ratio, it is determined that the network load is abnormal. If there is no abnormality, return to step S10.

[0071] S47. If the network load is abnormal, load balancing adjustment is performed. Load balancing adjustment is to achieve basic balancing of data on different data links by redistributing the number of data packets / data frames in different channels / different frequency bands and sending / receiving communication data according to the allocation ratio. In this way, data traffic is intelligently distributed between the wireless public network and the wireless local area network to avoid congestion and optimize network resources, save traffic, and improve communication delay.

[0072] In the specific implementation process, in step S2, selecting the optimal backup network and establishing a connection includes the following steps: S21, the SOC subsystem sorts the demodulated broadcast signals according to signal quality from high to low, compares the system preset parameters, and selects the network with the best signal quality as the best backup network; S22, initiating network access requests to the networks in the order of ranking to establish network connections. First, the network with the highest signal quality is selected to establish network connection. If the network with the highest signal quality fails to connect successfully, the next network is selected according to the ranking to establish connection; if the network connection is successful, the network is used as the final optimal backup network.

[0073] In general, wireless public networks 4 / 5G have achieved regional coverage, while power-specific wireless LANs and public wireless hotspots are only covered in power sites and urban areas. The network connection status switching depends on the network services available at the current location / time. Generally, priority is given to power-specific wireless LANs and public wireless hotspots with the best rates. In areas of cross-coverage, dual connections can be used to ensure network channel backup, improve connection reliability, and improve latency. The communication management platform can perceive the real-time status of multiple connections and remotely control the dual-mode communication module to switch the main channel for business data communication. Because the network status of mobile terminals may change in real time during travel, it needs to be dynamically adjusted according to the quality of the network connection, generally like Figure 8 There are five states shown. The network switch at a fixed location gives priority to using the default parameter configuration of the communication management platform for network connection, and selects the backup channel after a sudden change in network quality. During the use of mobile terminals, according to the real-time network status changes, the local autonomous decision is made to switch the main network communication channel.

[0074] Please see Figure 8 , the connection status switching of the power wireless LAN, wireless public network and public wireless LAN includes the following processes: Process 1: The communication terminal moves away from the power wireless LAN area and close to the wireless public network signal coverage area, triggering the establishment of a dual-mode channel connection.

[0075] Process 2: The dual-mode channel connection has been established. If the wireless public network signal strength and link margin change are lower than the safety threshold or the traffic exceeds the limit, the wireless public network connection is disconnected, and only the power wireless LAN connection is retained.

[0076] Process 3: The dual-mode channel connection has been established. The power wireless LAN connection signal strength and link margin change are lower than the safety threshold. The power wireless LAN connection is disconnected, and only the wireless public network is retained.

[0077] Process 4: The communication terminal is away from the wireless public network signal coverage area and close to the power wireless LAN area, triggering the establishment of a dual-mode channel connection.

[0078] Process 5: The communication terminal is close to the public wireless LAN area and far away from the wireless public network signal coverage area, triggering the establishment of the dual-mode channel connection.

[0079] Process 6: The dual-mode channel connection has been established, the signal strength and link margin change of the public wireless LAN connection are lower than the safety threshold, the public wireless LAN connection is disconnected, and only the wireless public network is retained.

[0080] Process 7: The dual-mode channel connection has been established. The wireless public network signal strength and link margin change are lower than the safety threshold or the traffic exceeds the limit. The wireless public network connection is disconnected, and only the public wireless LAN connection is retained.

[0081] Process 8: The communication terminal monitors the signal strength and link margin of the power wireless LAN communication channel and the change is lower than the safety threshold, triggering the establishment of a dual-mode channel connection. The default wireless public network coverage area completely covers the public wireless hotspot area.

[0082] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A network enhanced connection system for electric power, characterized in that: It includes a dual-mode communication terminal, a wireless public network, a wireless local area network and an integrated power data network; the dual-mode communication terminal is provided with a dual-mode communication module for establishing a dual-mode connection with the wireless public network and the wireless local area network, and accessing the integrated power data network through the wireless public network or the wireless local area network; the dual-mode communication module includes a SOC subsystem for realizing network switching between the wireless public network and the wireless local area network.

2. The network enhanced connection system for electric power according to claim 1, characterized in that: The dual-mode communication module also includes a 4 / 5G communication module, a WiFi communication module and a terminal communication interface; the SOC subsystem is simultaneously connected to the 4 / 5G communication module and the WiFi communication module to achieve simultaneous connection to the wireless public network and the wireless local area network; The SOC subsystem communicates with the dual-mode communication terminal through the terminal communication interface.

3. The network enhanced connection system for electric power according to claim 2, characterized in that: The 4 / 5G communication module includes a 4 / 5G baseband chip, the WiFi communication module includes a WiFi baseband chip, and a state perception interface is provided between the 4 / 5G baseband chip and the WiFi baseband chip.

4. The network enhanced connection system for electric power according to claim 3, characterized in that: The state perception interface includes a public network baseband subsystem network connection state indication pin, a public network baseband subsystem communication state indication pin, a Wi-Fi baseband subsystem network connection state indication pin, and a Wi-Fi baseband subsystem communication state indication pin.

5. The network enhanced connection system for electric power according to any one of claims 1 to 4, characterized in that: The network enhanced connection system applied to electricity also includes a communication management platform, and the power integrated data network includes a front-end machine and a business management platform; the communication management platform is communicatively connected with the business management platform, and the dual-mode communication terminal establishes a connection with the business management platform through the communication management platform to access the data of the business management platform.

6. The network enhanced connection system for electric power according to claim 5, characterized in that: The business management platform includes multiple business systems, and the multiple business systems are uniformly connected to the front-end processor and communicate indirectly with the communication management platform through the front-end processor.

7. A network enhanced connection method for electric power, using the network enhanced connection system for electric power as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S10, SOC subsystem scans available wireless public networks and wireless local area networks in real time; S20, selecting the best backup network and establishing a connection; S30, SOC subsystem monitors the signal strength and link margin changes of the main network in real time; S40. The SOC subsystem performs network switching based on changes in signal strength and link margin.

8. The network enhanced connection method for electric power according to claim 7, characterized in that: In step S40, performing network switching based on changes in signal strength and link margin includes the following steps: S41, judging whether the signal strength and link margin change are lower than the safety threshold, and judging the flow limit at the same time; S42, if the signal strength and link margin change are lower than the safety threshold, or the traffic exceeds the limit, synchronize the network data frame MAC address, socket sequence number, and frame sequence number; S43: Switch the main network to the optimal backup network for data transmission.

9. The network enhanced connection method applied to electric power according to claim 8, characterized in that: The method further comprises: S44, if the signal strength and link margin changes are higher than the safety threshold and the traffic is normal, then determine network congestion; S45, if network congestion occurs, dual-mode link aggregation is performed; S46, performing load balancing judgment to determine whether the network load is abnormal; S47. If the network load is abnormal, perform load balancing adjustment.

10. The network enhanced connection method applied to electric power according to claim 7, characterized in that: In step S2, selecting the optimal backup network and establishing a connection includes the following steps: S21, the SOC subsystem sorts the demodulatable broadcast signals according to signal quality from high to low; S22. Initiate network access requests to the network in order of sorting to establish a network connection.

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