Method and system for accessing Internet based on dual-mode local communication network

Abstract

The invention discloses a method and a system for accessing to the Internet based on a dual-mode local communication network, relates to the technical field of intelligent electric meters, and solves the technical problem that the flexibility and the reliability of an intelligent power grid are influenced due to the fact that the single-point fault influence range of a concentrator is relatively large. The method comprises the following steps: a central coordinator CCO is in communication connection with a mobile communication router after being powered on; the station STA joins the network by selecting the central coordinator CCO; the end equipment transmits data to the station STA, and the station STA transmits the data to the central coordinator CCO through an HPLC link or an HRF link; the central coordinator CCO sends the data to a mobile communication router and forwards the data to a cloud master station through a public network; and the cloud master station sends a response frame after receiving the data, and the central coordinator CCO and the station STA receive the response frame in sequence and send the response frame to the end equipment. According to the invention, public network access is carried out through the mobile communication router, the flexibility and reliability of the smart power grid are improved, and the deployment process is simplified.

Description

Technical Field

[0001] This invention relates to the field of smart meter technology, and in particular to a method and system for accessing the Internet based on a dual-mode local communication network. Background Technology

[0002] In a smart grid system, the concentrator (or Data Concentrator Unit, DCU) is a key device in the electricity information collection system. It is primarily used to collect, store, process, and forward data from multiple smart meters, gathering data from all meters in the entire distribution area and then centrally transmitting it to the cloud master station. This model of smart meters relaying data to the cloud master station via concentrators (i.e., "meter → concentrator → cloud master station") is widely adopted in deployment due to its low cost and ease of management.

[0003] However, the concentrator is the core relay node connecting multiple electricity meters to the cloud master station. If the concentrator fails due to hardware / software failure, power outage, network link failure (such as the interruption of the communication link with the cloud master station), the data of all electricity meters within its jurisdiction will be unable to be uploaded, resulting in regional data interruption.

[0004] In the process of realizing this invention, the inventors discovered at least the following problems in the prior art: A single point of failure in a concentrator of a smart grid can have a wide impact, affecting the grid's flexibility and reliability. Summary of the Invention

[0005] The purpose of this invention is to provide a method and system for accessing the Internet based on a dual-mode local communication network, in order to solve the technical problem in existing smart grids where a single point of failure in a concentrator has a large impact range, affecting the flexibility and reliability of the smart grid. The various technical effects of the preferred solutions among the many technical solutions provided by this invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a method for accessing the Internet based on a dual-mode local communication network, comprising the following steps: S100: After the Central Coordinator (CCO) is powered on, it establishes a communication connection with the mobile communication router. The mobile communication router assigns an IP address to the CCO, completing the basic configuration for public network access; S200: After the Station STA is powered on, it automatically searches for nearby CCOs and joins the network by selecting a CCO, completing the construction of the local hierarchical network; S300: The end device transmits data to the Station STA. After receiving the data, the Station STA sends the data to the CCO via an HPLC link or an HRF link; S400: After receiving the data, the CCO performs operations such as constructing an internal / external network mapping table, reconstructing the IP packet sent to the cloud master station, and encapsulating the MAC frame, before sending the data to the mobile communication router, which forwards it to the cloud master station via the public network; S500: After receiving the data, the cloud master station sends a response frame. The CCO and the Station STA receive the response frame successively and send it to the end device, completing one bidirectional communication.

[0007] Preferably, in step S100, the Central Coordinator (CCO) is connected to the mobile communication router via a network cable, and the mobile communication router assigns an IP address to the CCO via Dynamic Host Configuration Protocol (DHCP).

[0008] Preferably, in step S200, the central coordinator (CCO) adopts fileless networking. If the terminal STA is joining the network for the first time, it selects the central coordinator (CCO) with the best communication quality to join the network. If it is not joining the network for the first time, it selects the central coordinator (CCO) that successfully joined the network last time.

[0009] Preferably, in step S300, the terminal device encapsulates the application layer data into IP packets through its internal network protocol stack and transmits them to the station STA via the SLIP protocol serial port. After receiving the data, the station STA parses the SLIP format data into IP packets, adds a dual-mode protocol header, and then sends the data to the central coordinator CCO via the HPLC link or HRF link.

[0010] Preferably, step S400 includes: S410: The Central Coordinator (CCO) extracts the source IP address, source port, destination IP address, destination port, and the Terminal Equipment Identifier (TEI) of the site STA, saves them as a set of key values, and assigns a port PORT_CCO as an internal / external network mapping table; S420: The IP packets of the site STA are replaced, replacing the source IP address with the IP address of the Central Coordinator (CCO) as the destination IP address, and replacing the source port with the port PROT_CCO as the destination port, and the checksum is recalculated; S430: The MAC address of the mobile communication router is used as the destination MAC address, and the MAC address of the Central Coordinator (CCO) is used as the source MAC address for MAC frame encapsulation. The Central Coordinator (CCO) sends the data to the mobile communication router through the network interface, and then forwards it to the cloud master station through the public network.

[0011] Preferably, in step S500, the Central Coordinator (CCO) performs the following operations upon receiving the response frame: S510: Extract the target IP address and target port from the IP packet of the response frame, obtain the source IP address and source port of the STA through the internal / external network mapping table, replace the target IP address and target port respectively, and recalculate the IP packet checksum; S520: Simultaneously obtain the Terminal Equipment Identifier (TEI) of the STA, construct a dual-mode protocol header based on the TEI, with the payload being an IP packet, and send it to the corresponding STA through the HPLC link or HRF link.

[0012] Preferably, after receiving the response frame from the Central Coordinator (CCO), the STA encapsulates it into serial port data using the SLIP protocol and then forwards it to the end device.

[0013] A system for accessing the Internet based on a dual-mode local communication network, used to run any of the above-described methods for accessing the Internet based on a dual-mode local communication network, includes a mobile communication router, a central coordinator (CCO), site stations (STAs), and end devices; the mobile communication router communicates with the cloud master station through a mobile network; the mobile communication router and the central coordinator (CCO) are connected through an RJ45 interface; the central coordinator (CCO) and the site stations (STAs) are connected through an HPLC link or an HRF link; the central coordinator (CCO) and multiple site stations (STAs) form a multi-level local network; and the site stations (STAs) and end devices communicate serially via the SLIP protocol.

[0014] Preferably, the transmission data of the Central Coordinator (CCO) and the Station (STA) includes a frame header and IP packets. The frame header is defined by the dual-mode protocol and is used to carry network control information. The IP packets are the service data exchanged between the end devices and the cloud master station.

[0015] Preferably, the mobile communication router is a 4G router or a 5G router.

[0016] Implementing one of the above-described technical solutions of the present invention has the following advantages or beneficial effects: This invention breaks through the traditional hierarchical architecture of "meter-concentrator-master station," using a mobile communication router to directly handle public network access, reducing the risk of intermediate node failures and improving the flexibility and reliability of the smart grid. Since local configuration and maintenance of the concentrator are unnecessary, the deployment process is simplified. Simultaneously, it integrates the State Grid dual-mode interconnection protocol with public IP transmission, preserving the stability of powerline / wireless local networking while enabling direct logical communication between end devices and the cloud master station via IP protocol, solving the technical bottleneck of traditional local networks being unable to directly access the public network. Furthermore, it supports end devices accessing multiple master stations and multiple ports, is compatible with smart meters and other smart devices, and adapts to both HPLC and HRF local links, forming a flexible communication capability of "one-time deployment, multi-device adaptation, and multi-link redundancy." Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a flowchart of a method for accessing the Internet based on a dual-mode local communication network according to Embodiment 1 of the present invention; Figure 2 This is a flowchart of step S400 in a method for accessing the Internet based on a dual-mode local communication network according to Embodiment 1 of the present invention; Figure 3 This is a flowchart of step S500 in a method for accessing the Internet based on a dual-mode local communication network according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of a system for accessing the Internet based on a dual-mode local communication network, according to Embodiment 2 of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of a system for accessing the Internet based on a dual-mode local communication network, according to Embodiment 2 of the present invention. Figure 2 . Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, various exemplary embodiments described below will be referenced to the accompanying drawings, which form part of the exemplary embodiments, illustrating various exemplary embodiments that may be used to implement the present invention. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. It should be understood that they are merely examples of processes, methods, and apparatuses consistent with some aspects of the present invention disclosed as detailed in the appended claims, and other embodiments may be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and spirit of the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the referred element must have a specific orientation, or be constructed and operated in a specific orientation. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. The term "multiple" means two or more. The terms "connected" and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, communication connections, direct connections, indirect connections through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more of the related listed items. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] To illustrate the technical solution described in this invention, specific embodiments are described below, showing only the parts related to the embodiments of this invention.

[0021] Example 1: like Figure 1As shown, this invention provides a method for accessing the Internet based on a dual-mode local communication network, including the following steps: S100: After the Central Coordinator (CCO) is powered on, it connects to the mobile communication router. The mobile communication router assigns an IP address to the CCO, completing the basic configuration for public network access; S200: After the Station STA (STA) is powered on, it automatically searches for nearby CCOs and joins the network by selecting a CCO, completing the construction of the local hierarchical network; S300: The end device (such as a smart meter) transmits data to the Station STA. After receiving the data, the Station STA transmits it via an HPLC link (High-speed Power Line Communication, using low-voltage or medium-voltage power lines as the transmission medium) or an HRF link (High-speed Radio). Frequency (high-speed wireless radio frequency communication, specifically referring to wireless communication in the 470-510MHz frequency band in the field of smart meters) sends the data to the Central Coordinator (CCO). This embodiment employs dual-mode communication, utilizing both low-voltage power lines and spatial radiation paths to achieve a communication network for the aggregation, transmission, and interaction of electricity consumption information from low-voltage power users and energy consumption information from other energy users. S400: The CCO receives the data, constructs an internal / external network mapping table, reconstructs the IP packet destined for the cloud master station, and encapsulates the MAC frame before sending the data to the mobile communication router, which then forwards it to the cloud master station via the public network. S500: Upon receiving the data, the cloud master station sends a response frame. The CCO and the STA (Station) receive the response frame successively and send it to the end device, completing one bidirectional communication cycle. In this embodiment, the IP address addressing rules are as follows: only static IP addresses of end devices are supported, and IP addresses can be flexibly allocated; the first communication requires the end device to take the initiative, so that the cloud master station can obtain the IP address and port number of the site STA; end devices can access different cloud master stations and different port numbers; both IPv4 and IPv6 are supported, and the central coordinator CCO maintains the corresponding internal and external network mapping tables respectively to achieve dual protocol stack adaptation; only UDP service is provided.This embodiment breaks through the traditional hierarchical architecture of "meter-concentrator-master station" by using a mobile communication router to directly undertake the public network access function, reducing the risk of intermediate node failure. Since there is no need for local configuration and maintenance of the concentrator, the deployment process is simplified. At the same time, it integrates the State Grid dual-mode interconnection protocol with public network IP transmission, which not only retains the stability of powerline / wireless local networking, but also realizes direct logical communication between end devices and cloud master stations through IP protocol, solving the technical bottleneck that traditional local networks cannot directly access the public network. Furthermore, it supports end devices to access multiple master stations and multiple ports, is compatible with smart meters and other smart devices, and adapts to both HPLC and HRF local links, forming a flexible communication capability of "one-time deployment, multi-device adaptation, and multi-link redundancy".

[0022] As an optional implementation, in step S100, the Central Coordinator (CCO) and the Mobile Communication Router are connected via a network cable, i.e., they communicate via wired connection, thereby enabling more stable data transmission. The Mobile Communication Router assigns an IP address to the Central Coordinator (CCO) via Dynamic Host Configuration Protocol (DHCP). Assigning IP addresses via DHCP enables automated operation, saves IP address resources, and is easy to expand and maintain.

[0023] As an optional implementation, in step S200, the Central Coordinator (CCO) adopts a file-free networking approach, i.e., the whitelist mechanism is disabled, meaning it does not rely on locally stored configuration files for networking. Network parameters are automatically obtained via Dynamic Host Configuration Protocol (DHCP), enabling end devices to connect to the network immediately upon power-on, significantly reducing the initial deployment configuration costs (no need to pre-configure device files). If a terminal STA is joining the network for the first time, it selects the CCO with the best communication quality (which can be determined using existing technology) to join the network. If it is not joining the network for the first time, it selects the CCO from the last time it successfully joined the network, thereby ensuring the communication quality between the terminal STA and the CCO and achieving reliable data transmission.

[0024] As an optional implementation, in step S300, the terminal device encapsulates the application layer data into IP packets through its internal network protocol stack and transmits them to the station STA via the SLIP (Serial Line Internet Protocol) serial port. The SLIP protocol is extremely simple to implement, has low transmission overhead, and is suitable for deterministic point-to-point environments. After receiving the data, the station STA parses the SLIP format data into IP packets, adds a dual-mode protocol header (the dual-mode protocol refers to two network protocols, HPLC and HRF. The dual-mode protocol header includes network control information such as the terminal device identifier TEI, as well as key parts for control, routing, verification, and management, located before the payload), and then sends the data to the central coordinator CCO via the HPLC link or HRF link.

[0025] As an optional implementation method, such as Figure 2 As shown, step S400 includes: S410: The Central Coordinator (CCO) extracts the source IP address, source port, destination IP, destination port, and the Terminal Equipment Identifier (TEI) of the site STA (a logical address concept, typically 2 bytes or 16 bits long, used to uniquely identify a communication terminal device in a power line communication network, such as a smart meter or relay node), saves it as a set of key values, and allocates a port PORT_CCO as an internal / external network mapping table, as shown in Table 1; by dynamically allocating the CCO port and binding it with the Terminal Equipment Identifier (TEI), transparent communication between the local private network IP (end device) and the public network IP (cloud master site) is achieved without relying on complex NAT devices, and simultaneously supports IPv4 / IPv6 dual protocol stacks. S420: Replace the IP packet of the STA site, replacing the source IP address with the IP address of the Central Coordinator (CCO) as the destination IP address, and replacing the source port with port PROT_CCO as the destination port. Recalculate the checksum to verify data integrity or update its checksum field after modifying the data packet. S430: Use the MAC address of the mobile communication router as the destination MAC address and the MAC address of the CCO as the source MAC address for MAC frame encapsulation. This encapsulates the upper-layer protocol data unit into a frame format that conforms to the network protocol standard for transmission over the physical medium. The CCO sends the data to the mobile communication router through the network interface and then forwards it to the cloud master site via the public network.

[0026] Table 1. Mapping Table of Internal and External Networks of the Central Coordinator (CCO) As an optional implementation method, such as Figure 3As shown, in step S500, the Central Coordinator (CCO) performs the following operations upon receiving the response frame: S510: Extract the target IP address (CCO's IP address) and target port (port PROT_CCO) from the IP packet of the response frame. Obtain the source IP address and source port of the STA through the internal and external network mapping table, replace the target IP address and target port respectively, and recalculate the IP packet checksum; S520: Simultaneously obtain the Terminal Equipment Identifier (TEI) of the STA, construct a dual-mode protocol header based on the TEI, and send the payload as an IP packet to the corresponding STA through the HPLC link or HRF link.

[0027] As an optional implementation, after receiving the response frame from the Central Coordinator (CCO), the STA encapsulates it into serial port data using the SLIP protocol and then forwards it to the end device, thereby completing a bidirectional communication.

[0028] The embodiment is merely a specific example and does not indicate that this is the only way to implement the present invention.

[0029] Example 2: A system for accessing the Internet based on a dual-mode local communication network, used to run Embodiment 1 One method for accessing the Internet based on a dual-mode local communication network, such as Figure 4 , Figure 5As shown, the system includes a mobile communication router, a central coordinator (CCO), site stations (STAs), and end devices. The mobile communication router communicates with the cloud master station via the mobile network. The mobile communication router and the central coordinator (CCO) are connected via an RJ45 interface, transmitting standard MAC frames conforming to the IEEE 802.3 Ethernet specification to enable IP data interaction between the central coordinator (CCO) and the public network. The central coordinator (CCO) and the site stations (STAs) are connected via HPLC or HRF links. The central coordinator (CCO) and multiple site stations (STAs) form a multi-level local network. The site stations (STAs) and end devices communicate via serial port using the SLIP protocol. The communication interface of the site stations (STAs) is consistent with the pin definitions of existing single-phase / three-phase smart meter carrier modules. They communicate with the end devices via serial port using the international standard SLIP protocol, which encapsulates IP packets to achieve data forwarding (the SLIP protocol is responsible for frame delimitation and transparent data transmission of the serial port link). With the above-mentioned equipment, the following hierarchical relationship is formed in this embodiment: Public network access layer: The central coordinator (CCO) is directly connected to the 4G router via a network cable, and accesses the public network through the 4G network to realize remote communication with the cloud master station; Local communication layer: The central coordinator (CCO) acts as the core node and forms a multi-level local network with multiple site STAs through HPLC links or HRF links. The networking protocol adopts the State Grid dual-mode interconnection protocol. This invention breaks through the traditional hierarchical architecture of "meter-concentrator-master station," using a mobile communication router to directly handle public network access, reducing the risk of intermediate node failures and improving the flexibility and reliability of the smart grid. Since local configuration and maintenance of the concentrator are unnecessary, the deployment process is simplified. Simultaneously, it integrates the State Grid dual-mode interconnection protocol with public IP transmission, preserving the stability of powerline / wireless local networking while enabling direct logical communication between end devices and the cloud master station via IP protocol, solving the technical bottleneck of traditional local networks being unable to directly access the public network. Furthermore, it supports end devices accessing multiple master stations and multiple ports, is compatible with smart meters and other smart devices, and adapts to both HPLC and HRF local links, forming a flexible communication capability of "one-time deployment, multi-device adaptation, and multi-link redundancy."

[0030] As an optional implementation, the transmission data of the Central Coordinator (CCO) and the Station (STA) includes a frame header and IP packets. The frame header is defined by the dual-mode protocol and is used to carry network control information. The IP packets are the service data exchanged between the end devices and the cloud master station.

[0031] As an optional implementation, the mobile communication router can be a 4G router or a 5G router. The choice between 4G and 5G mobile communication can be made based on the usage scenario; in this embodiment, a 4G router is preferred. Using a 4G or 5G router directly handles public network access, reducing the risk of intermediate node failures and eliminating the need for local configuration and maintenance of a concentrator, thus simplifying the deployment process.

[0032] The above description is merely a preferred embodiment of the present invention. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A method for accessing the Internet based on a dual-mode local communication network, characterized in that, Includes the following steps: S100: After the Central Coordinator (CCO) is powered on, it connects to the mobile communication router. The mobile communication router assigns an IP address to the Central Coordinator (CCO) and completes the basic configuration for public network access. S200: After the STA is powered on, it automatically searches for the surrounding Central Coordinator (CCO), selects the CCO to join the network, and completes the construction of the local hierarchical network. S300: The terminal device transmits data to the station STA. After receiving the data, the station STA sends the data to the central coordinator CCO via the HPLC link or HRF link. S400: After receiving the data, the Central Coordinator (CCO) performs operations such as building an internal and external network mapping table, reconstructing the IP packets destined for the cloud master station, and encapsulating MAC frames, it sends the data to the mobile communication router, which then forwards it to the cloud master station via the public network. S500: After receiving the data, the cloud master station sends a response frame. The central coordinator (CCO) and the site STA receive the response frame one after another and send it to the end device, completing a two-way communication.

2. A method for accessing the Internet based on a dual-mode local communication network according to claim 1, characterized in that, In step S100, the Central Coordinator (CCO) is connected to the mobile communication router via a network cable, and the mobile communication router assigns an IP address to the CCO via Dynamic Host Configuration Protocol (DHCP).

3. A method for accessing the Internet based on a dual-mode local communication network according to claim 1, characterized in that, In step S200, the Central Coordinator (CCO) adopts fileless networking. If the terminal STA is joining the network for the first time, it selects the CCO with the best communication quality to join the network. If it is not joining the network for the first time, it selects the CCO that successfully joined the network last time.

4. A method for accessing the Internet based on a dual-mode local communication network according to claim 1, characterized in that, In step S300, the terminal device encapsulates the application layer data into IP packets through its internal network protocol stack and transmits them to the station STA via the SLIP protocol serial port. After receiving the data, the station STA parses the SLIP format data into IP packets, adds a dual-mode protocol header, and then sends the data to the central coordinator CCO via the HPLC link or HRF link.

5. A method for accessing the Internet based on a dual-mode local communication network according to claim 1, characterized in that, The S400 process includes: S410: The Central Coordinator (CCO) extracts the source IP address, source port, destination IP address, destination port, and the Terminal Equipment Identifier (TEI) of the site (STA), saves them as a set of key values, and assigns a port (PORT_CCO) as an internal / external network mapping table. S420: Replace the IP packets of the STA site, replace the source IP address with the IP address of the Central Coordinator (CCO) as the destination IP address, replace the source port with the port PROT_CCO as the destination port, and recalculate the checksum; S430: The MAC address of the mobile communication router is used as the destination MAC address, and the MAC address of the central coordinator (CCO) is used as the source MAC address for MAC frame encapsulation. The central coordinator (CCO) sends the data to the mobile communication router through the network interface, and then forwards it to the cloud master station through the public network.

6. A method for accessing the Internet based on a dual-mode local communication network according to claim 1, characterized in that, In step S500, the Central Coordinator (CCO) performs the following operations upon receiving the response frame: S510: Extract the target IP address and target port from the IP packet of the response frame, obtain the source IP address and source port of the STA through the internal and external network mapping table, replace the target IP address and target port respectively, and recalculate the IP packet checksum; S520: Simultaneously obtain the Terminal Equipment Identifier (TEI) of the STA, construct a dual-mode protocol header based on the TEI, and send the payload as an IP packet to the corresponding STA via the HPLC link or HRF link.

7. A method for accessing the Internet based on a dual-mode local communication network according to claim 6, characterized in that, After receiving the response frame from the Central Coordinator (CCO), the STA encapsulates it into serial data using the SLIP protocol and then forwards it to the end device.

8. A system for accessing the Internet based on a dual-mode local communication network, characterized in that, The method for accessing the Internet based on a dual-mode local communication network according to any one of claims 1-7 includes a mobile communication router, a central coordinator (CCO), site STAs, and end devices; the mobile communication router communicates with the cloud master station through a mobile network, the mobile communication router and the central coordinator (CCO) are connected through an RJ45 interface, the central coordinator (CCO) and the site STAs are connected through an HPLC link or an HRF link, the central coordinator (CCO) and multiple site STAs form a multi-level local network, and the site STAs and end devices communicate serially through the SLIP protocol.

9. A system for accessing the Internet based on a dual-mode local communication network according to claim 8, characterized in that, The data transmitted by the Central Coordinator (CCO) and the Stations (STAs) includes frame headers and IP packets. The frame headers are defined by the dual-mode protocol and are used to carry network control information. The IP packets are the business data exchanged between the end devices and the cloud master station.

10. A system for accessing the Internet based on a dual-mode local communication network according to claim 8, characterized in that, The mobile communication router is either a 4G router or a 5G router.

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