A broadband-narrowband convergence node device and a method for determining its location

Abstract

The present invention relates to the field of wireless communications and discloses a broadband-narrowband convergence node device and a method for determining its location. The broadband-narrowband convergence node device includes a narrowband wireless communication module, a broadband wireless communication module, and a processing module. The narrowband wireless communication module and the broadband wireless communication module are respectively used to respond to communication connection requests and call corresponding protocols to establish communication connections with narrowband devices or broadband devices. The processing module is used to parse narrowband data and broadband data. The location determination method determines the number of broadband-narrowband convergence node devices set in the substation and the location of each broadband-narrowband convergence node device by constructing and solving a broadband-narrowband convergence node device location determination model. The goal of the model is to minimize the number of narrowband convergence node devices set under the premise of maximizing the signal strength sum function. Compared with the existing technology, the present invention has the advantages of being compatible with broadband and narrowband devices.

Description

Technical Field

[0001] The present invention relates to the field of wireless communications, and in particular to a broadband-narrowband convergence node device and a method for determining a location thereof. Background Art

[0002] As new power systems accelerate their development, the contradiction between insufficient grassroots equipment management personnel and the continued growth of equipment scale is becoming increasingly prominent. To address this conflict between insufficient O&M personnel and the increasing workload, substations are using drones, robots, intelligent sensing terminals, and other devices to replace some of the O&M work performed by operators, significantly improving overall substation O&M efficiency.

[0003] However, in terms of wireless networking in substations, there is a problem of inconsistent wireless network communication protocols due to the large number of wireless equipment manufacturers and complex interfaces. In addition, each manufacturer independently networks according to its own network needs. This networking model is difficult to manage, has high networking costs, and is technically complex.

[0004] CN116436943A discloses a communication system and method for the Internet of Things (IoT) of power transmission and transformation equipment, comprising a broadband and narrowband converged core network, a converged gateway, an access controller, an access node, a convergence node, and a sensor terminal that are sequentially connected in communication; the access node is integrated with a broadband board, a broadband independent antenna, a narrowband board, and a narrowband independent antenna; the sensor terminal is divided into a wired sensor terminal and a wireless sensor terminal; the number of the convergence nodes, wired sensor terminals, and wireless sensor terminals is set to multiple; the access node and the convergence node are electrically connected via a wireless communication link or a wired communication link, and a suitable network communication method is selected according to business requirements and network quality to ensure reliable and secure transmission of the broadband and narrowband networks of the IoT, improve the utilization rate of network resources, and optimize the transmission performance of the power transmission and transformation equipment. Although this application provides a method for connecting broadband devices and narrowband devices in a compatible manner, it still has the following defects:

[0005] 1. Lack of flexibility in adapting to communication protocols;

[0006] 2. The impact of the location of the aggregation node on the communication effect is not considered. Summary of the Invention

[0007] The purpose of the present invention is to provide a broadband-narrowband convergence node device and a method for determining its location in order to solve the above-mentioned defects in the prior art.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] According to a first aspect of the present invention, a broadband-narrowband fusion aggregation node device is provided for establishing a communication connection with a device to be accessed, wherein the device to be accessed includes a broadband device and a narrowband device. The broadband-narrowband fusion aggregation node device adaptively selects a communication protocol through a narrowband wireless communication module and a broadband wireless communication module to establish a communication connection with the broadband device and the narrowband device.

[0010] Optionally, the broadband and narrowband convergence node device includes:

[0011] a narrowband wireless communication module for, when the communication mode of the device to be connected is determined to be narrowband communication, obtaining a wireless networking protocol for an Internet of Things node device of a power transmission and transformation device from an adaptive protocol library in response to a communication connection request sent by the narrowband device, and establishing a communication connection with the narrowband device according to the wireless networking protocol for the Internet of Things node device of the power transmission and transformation device;

[0012] a broadband wireless communication module, configured to, when the communication mode of the device to be connected is determined to be broadband communication, obtain the WAPI protocol from the adaptive protocol library in response to a communication connection request sent by the broadband device, and establish a communication connection with the broadband device according to the WAPI protocol;

[0013] The processing module is used to parse the narrowband data received from the narrowband device according to the wireless networking protocol of the Internet of Things node device of the power transmission and transformation equipment after establishing a communication connection with the narrowband device, determine the monitored object, monitoring data and monitoring time, and encapsulate the monitored object, monitoring data and monitoring time according to a preset encapsulation format according to a preset format to obtain narrowband encapsulated data; after establishing a communication connection with the broadband device, parse the broadband data received from the broadband device according to the WAPI protocol, determine the monitored object, monitoring data and monitoring time, and encapsulate the monitored object, monitoring data and monitoring time according to a preset encapsulation format according to a preset format to obtain broadband encapsulated data.

[0014] Optionally, the preset encapsulation format is: writing the monitoring data and monitoring time, or the monitoring data and monitoring time, at the head of the corresponding encapsulated data, and writing the monitoring data or the monitoring data at the tail of the corresponding encapsulated data to achieve data encapsulation.

[0015] According to a second aspect of the present invention, a method for determining the location of a broadband-narrowband convergence node device as described above is provided, the method comprising the following steps:

[0016] Constructing a wide-narrowband convergence node device location determination model to determine a signal strength sum function that characterizes the signal strength between broadband and narrowband devices. The goal of the wide-narrowband convergence node device location determination model is to minimize the number of narrowband convergence node devices while maximizing the signal strength sum function. The model's decision variables include the number of wide-narrowband convergence node devices and the location coordinates of each wide-narrowband convergence node device.

[0017] The broadband and narrowband convergence node device location determination model is solved according to the constraint conditions to determine the number of broadband and narrowband convergence node devices set in the substation and the location of each broadband and narrowband convergence node device.

[0018] Optionally, the signal strength sum function is:

[0019]

[0020] in, is the total signal strength, 、 Respectively represent the first Narrowband devices, Broadband devices, The value range is 1 to , is the number of narrowband devices in the substation, The value range is 1 to , is the number of broadband devices in the substation, is the theoretical signal strength function of the broadband and narrowband convergence node device, , Respectively Narrowband devices, The broadband equipment is in the substation plan. The straight-line distance between the broadband and narrowband convergence node devices, and They are the signal attenuation coefficients of the substation wall and the signal attenuation coefficients of the main equipment in the substation, and Respectively A broadband and narrowband convergence node device and the The number of substation walls and main substation equipment between narrowband devices, and Respectively A broadband and narrowband convergence node device and the The number of substation walls and main substation equipment between broadband devices, For the The connection signal strength of narrowband devices, For the The connection signal strength of each narrowband device;

[0021] Optionally, the The connection signal strength of narrowband devices For the Narrowband devices and The actual signal strength between broadband and narrowband convergence node devices - The maximum value in The connection signal strength of narrowband devices For the Narrowband devices and The actual signal strength between broadband and narrowband convergence node devices - The maximum value among them, The number of broadband and narrowband convergence node devices.

[0022] Optionally, the constraints include:

[0023]

[0024] in, For the The connection signal strength required for a narrowband device to work properly.

[0025] Optionally, the constraint condition further includes:

[0026]

[0027] in, For the The connection signal strength required for broadband devices to work properly.

[0028] Optionally, the process of determining the location of the broadband-narrowband convergence node device further includes:

[0029] Obtain data information about data to be sent and received by the device to be connected, and determine the communication mode of each device to be connected based on the data information;

[0030] Determine the number of narrowband devices connected to the narrowband wireless communication module and the number of broadband devices connected to the broadband wireless communication module in the broadband-narrowband convergence node device according to the communication mode of each device to be connected;

[0031] Determine whether the number of connected narrowband devices is greater than the threshold for the number of connected narrowband wireless communication modules, and whether the number of connected broadband devices is greater than the threshold for the number of connected broadband wireless communication modules;

[0032] If the number of connected narrowband devices is greater than the access number threshold of narrowband wireless communication modules and / or the number of connected broadband devices is greater than the access number threshold of broadband wireless communication modules, the number of broadband and narrowband fusion aggregation node devices is increased at the corresponding positions.

[0033] Optionally, the data information includes one or more of data size and transmission and reception frequency.

[0034] Determining the communication mode of each device to be connected based on the data information is as follows:

[0035] If only one of the data size or the transceiver frequency is obtained, then if the obtained data size is less than a preset data size threshold or the obtained transceiver frequency is less than a preset transceiver frequency threshold, it is determined that the communication mode of the device to be connected is narrowband communication;

[0036] If the data size and the transceiver frequency are obtained at the same time, then if the obtained data size is less than a preset data size threshold and the obtained transceiver frequency is less than a preset transceiver frequency threshold, it is determined that the communication mode of the device to be connected is narrowband communication.

[0037] Optionally, the data information includes data usage; the device types of the devices to be connected include online monitoring devices, remote inspection devices, and operation and maintenance management devices;

[0038] Determining the communication mode of each device to be connected based on the data information is as follows:

[0039] If the data is used for sensor data of an online monitoring device, the communication mode of the device to be connected is determined to be narrowband communication;

[0040] If the data is used for video stream data of remote patrol equipment or operation and maintenance data of operation and maintenance management equipment, the communication mode of the device to be connected is determined to be broadband communication.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] (1) The present invention proposes a broadband-narrowband convergence node device that can be installed in a substation. When receiving a communication connection request from a device to be connected, the device selects a broadband protocol or a narrowband protocol suitable for the device to be connected from an adaptive protocol library, and establishes a communication connection with the device to be connected based on the selected broadband protocol or narrowband protocol. The broadband-narrowband convergence node device can simultaneously and compatibly connect broadband devices and narrowband devices, reducing the cost of deploying a wireless network in a substation and eliminating the need to network broadband devices and narrowband devices separately.

[0043] (2) The broadband-narrowband convergence node device proposed in the present invention can also adaptively determine relevant protocols to meet the connection requirements of various devices, improve the connection efficiency of establishing communication connections with various devices, and reduce connection costs.

[0044] (3) The present invention provides a method for determining the location of a broadband-narrowband convergence node device, which can ensure that the number of broadband-narrowband convergence node devices is minimized while ensuring maximum signal strength, thereby reducing equipment costs while ensuring communication quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic diagram of the structure of wireless networking of multiple types of devices in the prior art;

[0046] Figure 2 Schematic diagram of broadband converged wireless networking for substations according to an exemplary embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the structure of a broadband-narrowband convergence node device according to the present invention;

[0048] Figure 4 is a schematic diagram of a broadband-narrowband convergence node device according to an exemplary embodiment of the present invention;

[0049] Figure 5 is a schematic diagram of a broadband-narrowband convergence node device according to another exemplary embodiment of the present invention;

[0050] Figure 6 is a schematic diagram of a broadband converged wireless network for a substation according to another exemplary embodiment of the present invention;

[0051] Figure 7 Schematic diagram of the arrangement of a broadband-narrowband convergence node device according to an exemplary embodiment of the present invention;

[0052] Figure 8 FIG. 4 is a structural block diagram of a computing device according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0053] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0054] Example 1

[0055] Figure 1 The figure shows a schematic diagram of the structure of wireless networking of multiple types of devices in the prior art. Figure 1As shown in Figure 1, narrowband and broadband devices are deployed in the substation. Narrowband and broadband devices use different wireless networking methods.

[0056] Among them, the narrowband device is connected to the first network server through the edge physical proxy device, and then connected to the corresponding first backend server through the first network server. When the narrowband device is connected to the edge physical proxy device, narrowband communication is used. Narrowband communication mainly uses low-frequency signals to transmit data. The transmission rate is lower than that of broadband signals, but it can penetrate obstacles and has better coverage at long distances. Narrowband communication can be specifically implemented as communication technologies such as NB-IoT, LoRa, and Sigfox. Narrowband devices can be specifically implemented as sensor devices. The present invention does not limit the specific implementation method of narrowband devices.

[0057] According to one embodiment of the present invention, the edge physical proxy device can be specifically implemented as an edge device in a narrowband communication network to implement network management, data forwarding, etc. The first network server is configured to forward the received narrowband data sent by the narrowband device to the first backend server.

[0058] When broadband devices connect to routers, they utilize broadband communication. Broadband communication primarily uses high-frequency signals to transmit data, offering high transmission rates but limited coverage. Broadband communication can be implemented using communication technologies such as 4G, 5G, and WiFi. The broadband device transmits broadband data to the second backend server via the router, switch, and second network server. Broadband devices can be implemented as devices that utilize broadband for communication. The present invention does not limit the specific implementation of broadband devices.

[0059] Figure 2 FIG. 1 shows a schematic diagram of a broadband converged wireless network for a substation according to an exemplary embodiment of the present invention. Figure 2 As shown, narrowband devices and broadband devices are connected to a broadband-narrowband convergence node device, which is connected to an authentication server via an access switch. The authentication server and access switch are also connected to a broadband-narrowband access controller.

[0060] According to one embodiment of the present invention, the communication mode of the narrowband device includes narrowband communication, and the communication mode of the broadband device includes broadband communication, or the communication mode of the narrowband device is narrowband communication, and the communication mode of the broadband device is broadband communication.

[0061] Narrowband devices specifically include online monitoring equipment, such as various sensors. In substations, these devices primarily utilize narrowband wireless communication equipment for environmental monitoring. Specifically, they can be implemented as sensors for monitoring equipment temperature, ambient temperature and humidity, partial discharge, leakage current, and SF6 gas leaks. The amount of data transmitted is approximately several hundred bytes per transaction, and data is often reported periodically. Table 1 shows information about some narrowband devices:

[0062] Table 1 Narrowband device information

[0063]

[0064] Broadband equipment specifically includes remote patrol equipment and operation and maintenance management equipment. In substations, remote patrol equipment mainly includes equipment used for security monitoring, anti-theft, and personnel monitoring within the station, including robots, cameras, drones and other equipment. The transmitted data includes inspection data of real-time video streams, using high-bandwidth and real-time networks. Operation and maintenance management equipment mainly includes equipment used to support various operations of on-site personnel, including handheld terminals (including live detection instruments), smart safety helmets and other equipment. Through trajectory tracking and personnel positioning, it regulates on-site personnel patrol operations, switching operations, live maintenance and other behaviors, and requires the collection of facial, personnel behavior, voice and other data. The network requirements are the same as those of remote patrol equipment, and a high-bandwidth and real-time network is required. Table 2 shows the information of some broadband equipment:

[0065] Table 2 Broadband device information

[0066]

[0067] According to an embodiment of the present invention, a broadband-narrowband convergence node device receives narrowband data sent by narrowband devices and broadband data sent by broadband devices.

[0068] According to one embodiment of the present invention, Figure 3 As shown, the broadband-narrowband convergence node device includes a processing module, one or more narrowband wireless communication modules, and one or more broadband wireless communication modules.

[0069] The narrowband wireless communication module is used to respond to the communication connection request sent by the narrowband device when the communication mode of the device to be accessed is narrowband communication, obtain the wireless networking protocol of the Internet of Things node device of the power transmission and transformation equipment from the adaptive protocol library, and establish a communication connection with the narrowband device according to the wireless networking protocol of the Internet of Things node device of the power transmission and transformation equipment.

[0070] The broadband wireless communication module is used to obtain the WAPI protocol from the adaptive protocol library in response to a communication connection request sent by the broadband device when the communication mode of the determined device to be accessed is broadband communication, and establish a communication connection with the broadband device according to the WAPI protocol.

[0071] The processing module is suitable for parsing narrowband data sent by narrowband devices according to the wireless networking protocol of the Internet of Things node device of the power transmission and transformation equipment, determining the monitored object, monitoring data and monitoring time, encapsulating the monitored object, monitoring data and monitoring time according to the preset format according to the preset encapsulation format to obtain narrowband encapsulated data, parsing the received broadband data according to the WAPI protocol, determining the monitored object, monitoring data and monitoring time, encapsulating the monitored object, monitoring data and monitoring time according to the preset format according to the preset encapsulation format to obtain broadband encapsulated data.

[0072] Figure 4 FIG. 1 shows a schematic diagram of a broadband-narrowband convergence node device according to an exemplary embodiment of the present invention. Figure 4 As shown, the broadband-narrowband convergence node device includes a central processor for processing received broadband data and narrowband data; and also includes a memory for storing the received broadband data and narrowband data, etc.

[0073] According to one embodiment of the present invention, the broadband-narrowband convergence node device further includes one or more narrowband wireless communication modules and one or more broadband wireless communication modules. The present invention does not limit the specific number of narrowband wireless communication modules or broadband wireless communication modules included in the broadband-narrowband convergence node device, nor does it limit the specific frequency bands covered by the narrowband wireless communication modules or broadband wireless communication modules.

[0074] According to an embodiment of the present invention, a broadband and narrowband convergence node device may include three narrowband wireless communication modules and one broadband wireless communication module.

[0075] According to one embodiment of the present invention, the frequency bands covered by the narrowband wireless communication module in the broadband and narrowband convergence node device may include 470M and 2.4G frequency bands, and the frequency bands covered by the broadband wireless communication module may include 2.4G and 5G frequency bands.

[0076] According to one embodiment of the present invention, the narrowband wireless communication module in a broadband-narrowband convergence node device uses a communication protocol for narrowband communication with narrowband devices, including a wireless networking protocol for IoT nodes in power transmission and transformation equipment. This protocol standardizes the communication protocol used by IoT perception layer nodes in power transmission and transformation equipment during networking and communication, and is designed to achieve standardized networking and data transmission for these nodes.

[0077] The communication protocols used by broadband wireless communication modules and broadband devices for broadband communication include the WAPI protocol, namely Wireless LAN Authentication and Privacy Infrastructure, which is called Wireless LAN Authentication and Privacy Infrastructure in Chinese. It is a security protocol and also a mandatory standard for wireless LAN security in China.

[0078] Figure 5 FIG. 1 shows a schematic diagram of a broadband-narrowband convergence node device according to another exemplary embodiment of the present invention. Figure 5 As shown, the broadband-narrowband convergence node device includes a central processing unit and memory, a node networking protocol communication module serving as a narrowband wireless communication module, a first micropower wireless communication module, and a second micropower wireless communication module. The node networking protocol communication module uses a communication frequency band of 470 MHz and can be used for narrowband communication with other broadband-narrowband convergence node devices, sensor devices that communicate in low-power mode, and the like. Sensor devices that communicate in low-power mode specifically include devices that transmit a small amount of data each time, such as less than 100 KB or less than 200 KB. The first micropower wireless communication module and the second micropower wireless communication module use a communication frequency band of 2.4 GHz. Devices that use the node networking protocol communication module, the first micropower wireless communication module, and the second micropower wireless communication module for narrowband communication include narrowband devices, such as online monitoring devices.

[0079] According to one embodiment of the present invention, the broadband-narrowband convergence node device also includes a WAPI wireless communication module as a broadband wireless communication module. The WAPI wireless communication module uses 2.4 GHz and 5 GHz frequency bands. Devices that use the WAPI wireless communication module for broadband communication include broadband devices, such as remote inspection devices and operation and maintenance management devices.

[0080] According to an embodiment of the present invention, the broadband-narrowband convergence node device is further provided with an optical fiber or network cable interface for connecting to an access switch or other device for data exchange.

[0081] Back to Figure 2 The access switch is used to realize data exchange between the authentication server, broadband and narrowband access controller and broadband and narrowband convergence node equipment.

[0082] The authentication server can be implemented as a broadband or narrowband authentication server (AS). The authentication server is typically deployed centrally at the substation master station and communicates with substations. The authentication server can be deployed in a master-slave mode. The authentication server is suitable for managing digital certificates for broadband and narrowband devices, as well as broadband and narrowband access controllers, including certificate issuance, certificate authentication, and certificate recovery.

[0083] The Broadband Access Controller (AC), or Broadband AC, is an edge computing device that supports converged broadband and narrowband communications. Typically deployed in a cabinet in the secondary room, it manages the broadband and narrowband wireless networks within the substation, providing simultaneous broadband and narrowband network coverage. It supports broadband and narrowband network management functions, has built-in broadband network WAPI AC functionality, and incorporates all the access node functions of the existing narrowband wireless networking protocol for power transmission and transformation equipment IoT nodes. Depending on the voltage level, the AC can be deployed within the substation, in a regional centralized control center, or at a municipal or provincial level. It aggregates service data from all converged broadband and narrowband aggregation nodes (i.e., converged APs) for unified external forwarding. It supports management of all converged APs, including AP registration, networking, and configuration delivery.

[0084] Figure 6 FIG. 1 shows a schematic diagram of a broadband integrated wireless network for a substation according to another exemplary embodiment of the present invention. Figure 6 As shown, the dotted line represents a wireless network connection, which includes a broadband network and a narrowband network, and the solid line represents a wired network.

[0085] Narrowband devices include wireless temperature and humidity sensors, voiceprint monitoring sensors, and environmental noise sensors for online monitoring; broadband devices include drones, robots, control balls, intelligent monitoring mobile terminals for remote patrols, as well as safety helmets and handheld terminals for operation and maintenance management.

[0086] According to one embodiment of the present invention, narrowband devices communicate with a converged broadband AP through narrowband, while broadband devices communicate with the converged broadband AP through broadband. Multiple converged broadband and narrowband APs, or converged broadband and narrowband APs, can be deployed in a distributed manner within a substation. The present invention does not limit the number or deployment method of these converged broadband APs.

[0087] According to one embodiment of the present invention, when deploying one or more broadband-narrowband convergence node devices, one or more wireless access points APs for broadband communication may be supplementarily set up for the broadband network, such as WAPI wireless access points APs (WAPI APs for short) that use the WAPI protocol for broadband communication.

[0088] According to one embodiment of the present invention, a narrowband converged aggregation node, or a broadband-narrowband converged AP, can be connected to a broadband-narrowband access controller (AC) or core switch via one of the access switches. The core switch can be configured in a master and backup mode. The narrowband converged aggregation node, or broadband-narrowband converged AP, can also be connected to the core switch via an optical network unit (ONU), an optical splitter, or an optical line terminal (OLT).

[0089] The narrowband converged aggregation node, or broadband and narrowband converged AP, can also connect to other switches at the master station through the slave station's core switch, and further to the master station's authentication server through other switches. The authentication server is also connected to the integrated network equipment, and the core switch is also connected to the master station system and equipped with a firewall.

[0090] Forward isolation devices and reverse isolation devices are also set between the substation and the main station, and are connected to the comprehensive application host in the production control area.

[0091] Example 2

[0092] According to one embodiment of the present invention, when installing broadband and narrowband convergence node devices within a substation, it is necessary to rationally deploy multiple broadband and narrowband convergence node devices based on the substation's data collection requirements and the locations where broadband and narrowband convergence node devices can be installed. If there is still a need for a broadband network but it is not covered, it is necessary to deploy one or more broadband communication wireless access points (APs), such as WAPI wireless access points (APs), to meet the corresponding network requirements. Therefore, this embodiment provides a method for determining the location of broadband and narrowband convergence node devices.

[0093] According to one embodiment of the present invention, when setting up a broadband-narrowband convergence node, the first step is to obtain a substation floor plan. The substation floor plan includes the substation building walls, main substation equipment, broadband equipment, and narrowband equipment. The specific locations of the substation building walls, main substation equipment, broadband equipment, and narrowband equipment are marked on the substation floor plan.

[0094] Substation walls include the substation's perimeter walls and the exterior and interior walls of buildings such as houses. Substation main equipment, such as transformers, maintains the substation's normal operation. Broadband and narrowband equipment are suitable for monitoring the substation environment and main equipment.

[0095] Since the building walls and main equipment of the substation will have a certain impact on the signal transmission of broadband and narrowband devices, the signals of the broadband and narrowband fusion node equipment will be attenuated when passing through the building walls or bypassing the substation.

[0096] According to one embodiment of the present invention, a substation wall signal attenuation coefficient is set to account for signal attenuation caused by substation walls. This coefficient can be determined based on the thickness and material of the substation walls, and can be determined through actual testing or preset, such as 0.7. Each time a signal from a broadband-narrowband convergence node passes through a substation wall, the signal strength is multiplied by the substation wall signal attenuation coefficient.

[0097] The present invention also sets a substation main equipment signal attenuation coefficient to account for signal attenuation caused by substation main equipment. This coefficient can be determined based on the size of the substation main equipment and the electromagnetic effects generated by the substation main equipment during operation. This coefficient can be determined through actual testing and can also be preset, such as 0.8. Each time the signal from the broadband-narrowband convergence node passes through a substation device, the signal strength is multiplied by the substation main equipment signal attenuation coefficient.

[0098] According to an embodiment of the present invention, a broadband-narrowband convergence node device location determination model may be established to determine the location of the broadband-narrowband convergence node device.

[0099] According to one embodiment of the present invention, a wide-narrow fusion aggregation node device location determination model determines a target by determining a signal strength sum function that characterizes the signal strength between broadband devices and narrowband devices. The target is to set the least number of narrowband fusion aggregation node devices under the premise of maximizing the signal strength sum function. Its decision variables include the number of wide-narrow fusion aggregation node devices and the location coordinates of each wide-narrow fusion aggregation node device.

[0100] The location coordinates of each broadband-narrowband convergence node device include the horizontal coordinate x and the vertical axis y The location coordinates of the broadband and narrowband convergence node equipment can be expressed in longitude and latitude respectively, and can also be determined by establishing a coordinate system based on the plane map of the substation. The present invention does not limit the specific representation method of the location coordinates of the broadband and narrowband convergence node equipment. A total of broadband and narrowband convergence node devices, then The location coordinates of the broadband and narrowband convergence node devices include: ), Indicates the A broadband and narrowband convergence node device, The value range is 1- .

[0101] The substation includes Narrowband devices and The location coordinates of broadband devices are similar to those of broadband and narrowband convergence node devices. Indicates the Narrowband devices, The value range is 1- , Indicates the Broadband devices, The value range is 1- . No. The location coordinates of narrowband devices include ( ), No. The location coordinates of broadband devices include: ).

[0102] According to The location coordinates of narrowband devices ( ) and The location coordinates of the broadband and narrowband convergence node device ( ) Determine the straight-line distance between ,include:

[0103]

[0104] According to The location coordinates of broadband devices ( ) and The location coordinates of the broadband and narrowband convergence node device ( ) Determine the straight-line distance between ,include:

[0105]

[0106] No. The signal of the broadband and narrowband convergence node device is transmitted to the The theoretical signal strength of a narrowband device is , No. The signal of the broadband and narrowband convergence node device is transmitted to the The theoretical signal strength of a narrowband device is . is the theoretical signal strength function of the broadband and narrowband convergence node device, which is related to the distance of the receiving device. It can be obtained according to surveying, fitting and other steps.

[0107] Then, according to the connection lines between each broadband and narrowband convergence node device and narrowband or broadband devices on the substation plan, the number of substation walls and the number of substation main devices between the broadband and narrowband convergence node device and the narrowband or broadband devices are determined. A broadband and narrowband convergence node device and the The number of substation walls between narrowband devices is , the number of main equipment of the substations separated by , No. A broadband and narrowband convergence node device and the The number of substation walls between broadband devices is , the number of main equipment of the substations separated by .

[0108] The signal attenuation coefficient of the substation wall is α, and the signal attenuation coefficient of the substation main equipment is β. The signal of the broadband and narrowband convergence node device is transmitted to the The actual signal strength of a narrowband device is: , No. The signal of the broadband and narrowband convergence node device is transmitted to the The actual signal strength of broadband devices is .

[0109] In the present invention, each narrowband device or broadband device is configured to select a broadband convergence node device with the largest actual signal strength for connection. The connection signal strength of narrowband devices is Narrowband devices and The actual signal strength between broadband and narrowband convergence node devices - The maximum value in (i.e. Take 1- hour, The maximum value of The connection signal strength of broadband devices is Narrowband devices and The actual signal strength between broadband and narrowband convergence node devices - The maximum value in (i.e. Take 1- hour, maximum value of ).

[0110] The total signal strength is calculated based on the connection signal strength of each narrowband device and the connection signal strength of each broadband device. The signal strength sum function is:

[0111]

[0112] in, is the total signal strength, 、 Respectively represent the first Narrowband devices, Broadband devices, The value range is 1 to , is the number of narrowband devices in the substation, The value range is 1 to , is the number of broadband devices in the substation, is the theoretical signal strength function of the broadband and narrowband convergence node device, , Respectively Narrowband devices, The broadband equipment is in the substation plan. The straight-line distance between the broadband and narrowband convergence node devices, and They are the signal attenuation coefficients of the substation wall and the signal attenuation coefficients of the main equipment in the substation, and Respectively A broadband and narrowband convergence node device and the The number of substation walls and main substation equipment between narrowband devices, and Respectively A broadband and narrowband convergence node device and the The number of substation walls and main substation equipment between broadband devices, For the The connection signal strength of narrowband devices, The value range is [1, ], For the The connection signal strength of narrowband devices, The value range is [1, ].

[0113] The constraints for solving the broadband-narrowband convergence node device location determination model include:

[0114] The connection signal strength of each narrowband device must be greater than the first preset threshold , For the The connection signal strength required for a narrowband device to work properly.

[0115]

[0116] The connection signal strength of each broadband device must be greater than the second preset threshold , For the The connection signal strength required for broadband devices to work properly.

[0117]

[0118] By solving the wide-narrow convergence node device location determination model according to the constraint conditions, the number of wide-narrow convergence node devices set in the substation and the location of each wide-narrow convergence node device can be determined.

[0119] According to one embodiment of the present invention, when solving the wide-narrow convergence node device determination model based on constraints, a particle swarm optimization algorithm or other method can be used to solve the model. A variety of algorithms can be used to solve the model, and the present invention does not limit the specific type of algorithm selected.

[0120] According to one embodiment of the present invention, if, when determining the number and location of broadband-narrow fusion aggregation node devices, the network requirements of broadband devices are high and cannot be met by only broadband-narrow fusion aggregation node devices, one or more wireless access points AP for broadband communication, such as WAPI wireless access points AP, can also be set to meet the corresponding network requirements.

[0121] The process of determining the setting location of the wide-narrow fusion aggregation node device also includes: obtaining one or more of the data size, transmission and reception frequency, and data purpose of the data to be sent and received by the device to be connected, and determining the communication mode of each device to be connected based on one or more of the data size, transmission and reception frequency, and data purpose; determining the number of narrowband devices accessed by the narrowband wireless communication module and the number of broadband devices accessed by the broadband wireless communication module in the wide-narrow fusion aggregation node device to be set based on the communication mode of each device to be connected; judging whether the number of narrowband devices accessed is greater than the access number threshold of the narrowband wireless communication module, and whether the number of broadband devices accessed is greater than the access number threshold of the broadband wireless communication module; if the number of narrowband devices accessed is greater than the access number threshold of the narrowband wireless communication module and / or the number of broadband devices accessed is greater than the access number threshold of the broadband wireless communication module, then increasing the number of wide-narrow fusion aggregation node devices to be set at the corresponding position.

[0122] According to one embodiment of the present invention, when the number of wide-narrow fusion aggregation node devices to be set up is increased at the corresponding position, at the location where the number of wide-narrow fusion aggregation node devices connected is greater than the narrowband wireless communication module access number threshold and / or the number of broadband devices connected is greater than the broadband wireless communication module access number threshold, wide-narrow fusion aggregation node devices are added until the restriction requirements of the narrowband wireless communication module access number threshold and the broadband wireless communication module access number threshold are met.

[0123] According to one embodiment of the present invention, the size of data to be sent and received can be the size of data to be transmitted at one time, or the size of data to be transmitted every minute or every second. The frequency of transmission and reception determines the length of each data transmission cycle, such as once every minute. Data usage includes descriptive information about the data, such as sensor data from online monitoring equipment used to monitor a specific indicator; video stream data from remote inspection equipment used for security monitoring; and operation and maintenance data from operation and maintenance management equipment used for manual equipment inspections and personnel location.

[0124] When determining the communication mode, if the data size is less than a preset data size threshold and / or the transceiver frequency is less than a preset transceiver frequency threshold, the communication mode is determined to be narrowband communication; otherwise, the communication mode is determined to be broadband communication. According to one embodiment of the present invention, the preset data size threshold can be set to 200 KB, and the preset transceiver frequency threshold can be set to once per minute.

[0125] When determining the communication mode, if the data is used as sensor data from online monitoring equipment for monitoring a certain indicator, then the communication mode is determined to be narrowband communication. If the data is used as video stream data from remote patrol equipment for security monitoring, or operation and maintenance data from operation and maintenance management equipment for manual equipment inspection, personnel positioning, etc., then the communication mode is determined to be broadband communication.

[0126] Figure 7 FIG. 1 shows a schematic diagram of the arrangement of a wide-narrow convergence node device according to an exemplary embodiment of the present invention. Figure 7 As shown in the figure, multiple broadband-narrowband convergence node devices and WAPI wireless access points (APs) are installed in the substation. The circle with the broadband-narrowband convergence node device or WAPI wireless access point (AP) as the center represents the range of devices connected to the broadband-narrowband convergence node device or WAPI wireless access point (AP).

[0127] According to one embodiment of the present invention, the broadband-narrowband convergence node device is also equipped with an adaptive protocol library to meet the connection requirements of multiple devices, including broadband and narrowband devices. According to one embodiment of the present invention, after multiple broadband-narrowband convergence node devices are set up within the substation, the broadband-narrowband convergence node device begins operation and sends an AP signal. Broadband and narrowband devices can then select the broadband-narrowband convergence node device with the strongest signal that can be found for connection, and send a communication connection request to the target broadband-narrowband convergence node device.

[0128] According to an embodiment of the present invention, when a broadband device and a narrowband device send a communication connection request, since different devices may have multiple communication modes, they can select one of the communication modes for communication based on the data to be sent and received.

[0129] like Figure 3 As shown in the figure, the broadband and narrowband convergence node device includes:

[0130] a narrowband wireless communication module for, when the communication mode of the device to be connected is determined to be narrowband communication, obtaining a wireless networking protocol for an Internet of Things node device of a power transmission and transformation device from an adaptive protocol library in response to a communication connection request sent by the narrowband device, and establishing a communication connection with the narrowband device according to the wireless networking protocol for the Internet of Things node device of the power transmission and transformation device;

[0131] a broadband wireless communication module, configured to, when the communication mode of the device to be connected is determined to be broadband communication, obtain the WAPI protocol from the adaptive protocol library in response to a communication connection request sent by the broadband device, and establish a communication connection with the broadband device according to the WAPI protocol;

[0132] The processing module is used to parse the narrowband data received from the narrowband device according to the wireless networking protocol of the Internet of Things node device of the power transmission and transformation equipment after establishing a communication connection with the narrowband device, determine the monitored object, monitoring data and monitoring time, and encapsulate the monitored object, monitoring data and monitoring time according to a preset encapsulation format according to a preset format to obtain narrowband encapsulated data; and after establishing a communication connection with the broadband device, parse the broadband data received from the broadband device according to the WAPI protocol, determine the monitored object, monitoring data and monitoring time, and encapsulate the monitored object, monitoring data and monitoring time according to a preset encapsulation format according to a preset format to obtain broadband encapsulated data.

[0133] After receiving narrowband data from the narrowband wireless communication module, the processing module parses the data according to a narrowband communication protocol, such as the wireless networking protocol for IoT nodes in power transmission and transformation equipment, to determine the monitored object, monitoring data, and monitoring time. Monitored objects include the substation environment and substation equipment. Monitoring data includes monitoring items and item values, such as equipment temperature and the corresponding temperature value. The detection value is the time when the data was detected.

[0134] According to one embodiment of the present invention, after the broadband wireless communication module receives broadband data, the processing module parses the broadband data according to a broadband communication protocol, such as the WAPI protocol, to determine the monitored object, monitoring data, and monitoring time. Monitored objects include substation equipment, operation and maintenance personnel, etc. The monitoring data includes monitoring items and corresponding monitoring data. The monitoring data can be implemented as video data or image data, and the present invention does not limit the specific type of monitoring data. The monitoring time is the time when the data is monitored.

[0135] Subsequently, the processing module encapsulates the monitored object, monitoring data and monitoring time according to the preset encapsulation format according to the preset format to obtain narrowband encapsulation data, and the processing module encapsulates the monitored object, monitoring data and monitoring time according to the preset format according to the preset encapsulation format to obtain broadband encapsulation data.

[0136] When the processing module encapsulates the monitored object, monitoring data and monitoring time according to the preset encapsulation format, the narrowband encapsulation data is marked according to the monitoring time and the monitored object, so as to sort the narrowband encapsulation data according to the monitoring time, classify the narrowband encapsulation data according to the monitored object, and parse the narrowband encapsulation data according to a unified parsing method to obtain monitoring data, so as to further process the monitoring data.

[0137] When the processing module encapsulates the monitored object, monitoring data and monitoring time according to the preset encapsulation format, the broadband encapsulation data is marked according to the monitoring time and the monitored object, so as to sort the broadband encapsulation data according to the monitoring time, classify the broadband encapsulation data according to the monitored object, and parse the broadband encapsulation data according to a unified parsing method to obtain monitoring data so as to further process the monitoring data.

[0138] According to one embodiment of the present invention, the preset encapsulation format may specifically include writing the monitoring data and monitoring time, or the monitoring data and monitoring time, at the head of the encapsulated data, and writing the monitoring data or the monitoring data at the tail of the encapsulated data, thereby encapsulating the data. The present invention does not limit the specific form of the preset encapsulation format. Encapsulating broadband data and narrowband data using the same preset encapsulation format can improve the efficiency of data encapsulation, transmission, and parsing, eliminating the need to set separate transmission links and transmission requirements for broadband data and narrowband data, thereby reducing data transmission and processing costs.

[0139] Example 3

[0140] The broadband and narrowband convergence node device of the present invention can be specifically implemented as a computing device. Figure 8 A schematic diagram of a computing device 800 is shown according to an exemplary embodiment of the present invention.

[0141] like Figure 8 As shown, the computing device 800 may include a central processing unit 810, a memory 820, an input / output interface 830, a communication interface 840, and a bus 850. The central processing unit 810, the memory 820, the input / output interface 830, and the communication interface 840 are connected to each other via the bus 850 within the computing device.

[0142] The central processing unit 810 can be implemented using a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0143] The memory 820 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage devices, dynamic storage devices, etc. The memory 820 can store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 820 and is called and executed by the central processing unit 810.

[0144] The input / output interface 830 is used to connect to input / output modules to enable information input and output. The communication interface 840 is used to enable communication between the computing device and other devices. The bus 850 comprises a pathway for transmitting information between the various components of the computing device (e.g., the CPU 810, memory 820, the input / output interface 830, and the communication interface 840).

[0145] It should be noted that although the computing device shown above only includes a central processing unit 810, a memory 820, an input / output interface 830, a communication interface 840, and a bus 850, in a specific implementation, the computing device may also include other components necessary for normal operation. In addition, those skilled in the art will understand that the computing device may only include the components necessary to implement the embodiments of this specification, and does not necessarily include all the components shown in the figure.

[0146] As used herein, unless otherwise specified, the use of ordinal numbers "first," "second," "third," etc. to describe common objects merely indicates that different instances of similar objects are involved and are not intended to imply that the objects so described must have a given order in time, space, ranking, or in any other manner.

[0147] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A method for determining the location of a broadband-narrowband convergence node device, characterized in that: The broadband-narrowband convergence node device is used to establish a communication connection with the device to be accessed, and the device to be accessed includes a broadband device and a narrowband device. The broadband-narrowband convergence node device adaptively selects a communication protocol through a narrowband wireless communication module and a broadband wireless communication module to establish a communication connection with the broadband device and the narrowband device. The location determination method includes the following steps: A wide-narrow fusion aggregation node device location determination model is constructed to determine the signal strength sum function that characterizes the signal strength between broadband devices and narrowband devices. The goal of the wide-narrow fusion aggregation node device location determination model is to minimize the number of narrowband fusion aggregation node devices while maximizing the signal strength sum function. The decision variables of the model include the number of wide-narrow fusion aggregation node devices and the location coordinates of each wide-narrow fusion aggregation node device. The signal strength sum function is: in, is the total signal strength, 、 Respectively represent the first Narrowband devices, Broadband devices, The value range is 1 to , is the number of narrowband devices in the substation, The value range is 1 to , is the number of broadband devices in the substation, is the theoretical signal strength function of the broadband and narrowband convergence node device, , Respectively Narrowband devices, The broadband equipment is in the substation plan. The straight-line distance between the broadband and narrowband convergence node devices, and They are the signal attenuation coefficients of the substation wall and the signal attenuation coefficients of the main equipment in the substation, and Respectively A broadband and narrowband convergence node device and the The number of substation walls and main substation equipment between narrowband devices, and Respectively A broadband and narrowband convergence node device and the The number of substation walls and main substation equipment between broadband devices, For the The connection signal strength of narrowband devices, For the The connection signal strength of each narrowband device; The wide-narrow convergence node device location determination model is solved according to the constraint conditions to determine the number of wide-narrow convergence node devices to be set in the substation and the location of each wide-narrow convergence node device. The constraint conditions include: in, For the The connection signal strength required for the normal operation of narrowband devices, For the The connection signal strength required for broadband devices to work properly.

2. The method for determining the location of a broadband-narrowband convergence node device according to claim 1, wherein: The broadband and narrowband convergence node device includes: a narrowband wireless communication module for, when the communication mode of the device to be connected is determined to be narrowband communication, obtaining a wireless networking protocol for an Internet of Things node device of a power transmission and transformation device from an adaptive protocol library in response to a communication connection request sent by the narrowband device, and establishing a communication connection with the narrowband device according to the wireless networking protocol for the Internet of Things node device of the power transmission and transformation device; a broadband wireless communication module, configured to, when the communication mode of the device to be connected is determined to be broadband communication, obtain the WAPI protocol from the adaptive protocol library in response to a communication connection request sent by the broadband device, and establish a communication connection with the broadband device according to the WAPI protocol; The processing module is used to parse the narrowband data received from the narrowband device according to the wireless networking protocol of the Internet of Things node device of the power transmission and transformation equipment after establishing a communication connection with the narrowband device, determine the monitored object, monitoring data and monitoring time, and encapsulate the monitored object, monitoring data and monitoring time according to a preset encapsulation format according to a preset format to obtain narrowband encapsulated data; after establishing a communication connection with the broadband device, parse the broadband data received from the broadband device according to the WAPI protocol, determine the monitored object, monitoring data and monitoring time, and encapsulate the monitored object, monitoring data and monitoring time according to a preset encapsulation format according to a preset format to obtain broadband encapsulated data.

3. The method for determining the location of a broadband-narrowband convergence node device according to claim 2, wherein: The preset encapsulation format is: writing the monitoring data and monitoring time, or the monitoring data and monitoring time, at the head of the corresponding encapsulated data, and writing the monitoring data or the monitoring data at the tail of the corresponding encapsulated data to achieve data encapsulation.

4. The method for determining the location of a broadband-narrowband convergence node device according to claim 1, wherein: The said The connection signal strength of narrowband devices For the Narrowband devices and The actual signal strength between broadband and narrowband convergence node devices - The maximum value in The connection signal strength of narrowband devices For the Narrowband devices and The actual signal strength between broadband and narrowband convergence node devices - The maximum value among them, The number of broadband and narrowband convergence node devices.

5. The method for determining the location of a broadband-narrowband convergence node device according to claim 1, wherein: The process of determining the location of the broadband-narrowband convergence node device further includes: Obtain data information about data to be sent and received by the device to be connected, and determine the communication mode of each device to be connected based on the data information; Determine the number of narrowband devices connected to the narrowband wireless communication module and the number of broadband devices connected to the broadband wireless communication module in the broadband-narrowband convergence node device according to the communication mode of each device to be connected; Determine whether the number of connected narrowband devices is greater than the threshold for the number of connected narrowband wireless communication modules, and whether the number of connected broadband devices is greater than the threshold for the number of connected broadband wireless communication modules; If the number of connected narrowband devices is greater than the access number threshold of narrowband wireless communication modules and / or the number of connected broadband devices is greater than the access number threshold of broadband wireless communication modules, the number of broadband and narrowband fusion aggregation node devices is increased at the corresponding positions.

6. The method for determining the location of a broadband-narrowband convergence node device according to claim 5, characterized in that: The data information includes one or more of data size and transmission and reception frequency. Determining the communication mode of each device to be connected based on the data information is as follows: If only one of the data size or the transceiver frequency is obtained, then if the obtained data size is less than a preset data size threshold or the obtained transceiver frequency is less than a preset transceiver frequency threshold, it is determined that the communication mode of the device to be connected is narrowband communication; If the data size and the transceiver frequency are obtained at the same time, then if the obtained data size is less than a preset data size threshold and the obtained transceiver frequency is less than a preset transceiver frequency threshold, it is determined that the communication mode of the device to be connected is narrowband communication.

7. The method for determining the location of a broadband-narrowband convergence node device according to claim 5, characterized in that: The data information includes the purpose of the data; the types of devices to be connected include online monitoring devices, remote inspection devices and operation and maintenance management devices; Determining the communication mode of each device to be connected based on the data information is as follows: If the data is used for sensor data of an online monitoring device, the communication mode of the device to be connected is determined to be narrowband communication; If the data is used for video stream data of remote patrol equipment or operation and maintenance data of operation and maintenance management equipment, the communication mode of the device to be connected is determined to be broadband communication.

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