Wide-narrow fusion sink node equipment and position determination method thereof

Abstract

The invention relates to the field of wireless communication, and discloses a wide-narrow fusion sink node device and a position determination method thereof, the wide-narrow fusion sink node device comprises a narrow-band wireless communication module, a wide-band wireless communication module and a processing module, the narrow-band wireless communication module and the wide-band wireless communication module are respectively used for responding to a communication connection request, and the processing module is used for processing the communication connection request. Calling a corresponding protocol to establish communication connection with the narrowband equipment or the broadband equipment; the processing module is used for analyzing the narrowband data and the broadband data; the position determination method comprises the following steps of: constructing a position determination model of the wide-narrow fusion sink node equipment and solving to determine the number of the wide-narrow fusion sink node equipment arranged in the transformer substation and the position of each piece of wide-narrow fusion sink node equipment; the target of the model is that the number of narrow-band fusion aggregation node devices arranged on the premise of the maximum signal intensity sum function is minimum. Compared with the prior art, the method has the advantages of being compatible with broadband equipment and narrowband equipment and the like.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication, and in particular to a wide and narrowband integrated convergence node device and a method for determining its position. Background Art

[0002] Under the situation of the accelerated development of the new power system, the contradiction between the shortage of grass-roots equipment management personnel and the continuous growth of the equipment scale has become increasingly prominent. To solve the contradiction between the shortage of operation and maintenance personnel and the increasing equipment maintenance volume, substations rely on equipment such as unmanned aerial vehicles, robots, and intelligent sensing terminals to replace some of the substation operation and maintenance work of operation and maintenance personnel, greatly improving the overall operation and maintenance efficiency of substations.

[0003] However, in terms of substation wireless networking, due to the large number of wireless device manufacturers and complex interfaces, there is a problem of inconsistent wireless network communication protocols. And each manufacturer independently networks according to its own network requirements, making the management of this networking mode difficult, with high networking costs and complex technologies.

[0004] CN116436943A discloses a communication system and method applied to the Internet of Things for power transmission and transformation equipment, including a wide and narrowband integrated core network, a convergence gateway, an access controller, an access node, a convergence node, and a sensor terminal that are communicatively connected in sequence; a broadband board card, a broadband independent antenna, a narrowband board card, and a narrowband independent antenna are integrated in the access node; the sensor terminals are divided into wired sensor terminals and wireless sensor terminals; the number of the convergence nodes, wired sensor terminals, and wireless sensor terminals is set to be multiple; the access node and the convergence node are electrically connected through a wireless communication link or a wired communication link, and a suitable network communication method is selected according to service requirements and network quality to ensure the reliable and secure transmission of the wide and narrow networks of the Internet of Things, improve the utilization rate of network resources, and optimize the transmission performance of power transmission and transformation equipment. Although this application gives a method for compatibly connecting broadband devices and narrowband devices, there are still the following defects: 1. Lack of flexibility in adapting communication protocols; 2. The influence of the position setting of the convergence node on the communication effect is not considered. Summary of the Invention

[0005] The purpose of the present invention is to provide a wide and narrowband integrated convergence node device and a method for determining its position to solve the above-mentioned defects existing in the prior art.

[0006] The purpose of the present invention can be achieved through the following technical solutions: According to a first aspect of the present invention, there is provided a wide - narrow fusion convergence node device for communicating and connecting with devices to be accessed. The devices to be accessed include broadband devices and narrow - band devices. The wide - narrow fusion convergence node device adaptively selects a communication protocol through a narrow - band wireless communication module and a broadband wireless communication module, and establishes communication connections with the broadband devices and the narrow - band devices.

[0007] Optionally, the wide - narrow fusion convergence node device includes: A narrow - band wireless communication module, which is used to, when the determined communication mode of the device to be accessed is narrow - band communication, in response to a communication connection request sent by the narrow - band device, obtain the wireless networking protocol for power transmission and transformation equipment Internet of Things node devices from the adaptive protocol library, and establish a communication connection with the narrow - band device according to the wireless networking protocol for power transmission and transformation equipment Internet of Things node devices; A broadband wireless communication module, which is used to, when the determined communication mode of the device to be accessed is broadband communication, in response to a communication connection request sent by the broadband device, obtain the WAPI protocol from the adaptive protocol library, and establish a communication connection with the broadband device according to the WAPI protocol; A processing module, which is used to, after establishing a communication connection with the narrow - band device, parse the narrow - band data sent by the narrow - band device according to the wireless networking protocol for power transmission and transformation equipment Internet of Things node devices, determine the monitored object, the monitoring data, and the monitoring time, encapsulate the monitored object, the monitoring data, and the monitoring time according to a preset format into a preset encapsulation format to obtain narrow - band encapsulated data. After establishing a communication connection with the broadband device, parse the broadband data sent by the broadband device according to the WAPI protocol, determine the monitored object, the monitoring data, and the monitoring time, encapsulate the monitored object, the monitoring data, and the monitoring time according to a preset format into a preset encapsulation format to obtain broadband encapsulated data.

[0008] Optionally, the preset encapsulation format is: writing the monitoring data and the monitoring time, or the monitoring data and the 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 implement data encapsulation.

[0009] According to a second aspect of the present invention, there is provided a method for determining the position of the wide - narrow fusion convergence node device as described above. The method includes the following steps: Construct a wide - narrow fusion convergence node device position determination model, and determine the signal strength sum function representing the signal strength between the broadband device and the narrow - band device. The goal of the wide - narrow fusion convergence node device position determination model is to minimize the number of wide - narrow fusion convergence node devices on the premise that the signal strength sum function is the largest. The decision variables of the model include the number of wide - narrow fusion convergence node devices and the position coordinates of each wide - narrow fusion convergence node device; Solve the wide - narrow fusion convergence node device location determination model according to the constraint conditions to determine the number of wide - narrow fusion convergence node devices set in the substation and the location of each wide - narrow fusion convergence node device.

[0010] Optionally, the signal strength sum function is: , where, G is the sum of signal strengths, i , l respectively represent the i th narrow - band device and the l th wide - band device in the substation. The value range of i is from 1 to m , m is the number of narrow - band devices in the substation. The value range of l is from 1 to n , n is the number of wide - band devices in the substation. is the theoretical signal strength function of the wide - narrow fusion convergence node device. , respectively are the straight - line distances between the i th narrow - band device, the l th wide - band device and the t th wide - narrow fusion convergence node device in the floor plan of the substation. and are respectively the substation wall signal attenuation coefficient and the substation main equipment signal attenuation coefficient in the substation. and respectively are the number of substation walls and the number of substation main equipment separated between the t th wide - narrow fusion convergence node device and the i th narrow - band device. and respectively are the number of substation walls and the number of substation main equipment separated between the t th wide - narrow fusion convergence node device and the l th wide - band device. is the connection signal strength of the i th narrow - band device. is the connection signal strength of the l th narrow - band device.

[0011] Optionally, the connection signal strength i of the th narrow - band device i is the connection between the kThe actual signal strength between narrow-wideband converging node devices - The maximum value in, the l connection signal strength of the th narrowband device is l the actual signal strength between the k th narrowband device and the - maximum value in, where k is the number of narrow-wideband converging node devices.

[0012] Optionally, the constraint conditions include: , where is the i connection signal strength required for the normal operation of the

[0013] Optionally, the constraint conditions further include: , where is the l connection signal strength required for the normal operation of the

[0014] Optionally, the process of determining the installation location of the narrow-wideband converging node devices further includes: Obtaining the data information of the data to be transmitted and received by the devices to be connected, and determining the communication mode of each device to be connected according to the data information; According to the communication mode of each device to be connected, 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 narrow-wideband converging node devices; Judging whether the number of accessed narrowband devices is greater than the access number threshold of the narrowband wireless communication module, and whether the number of accessed broadband devices is greater than the access number threshold of the broadband wireless communication module; If the number of accessed narrowband devices is greater than the access number threshold of the narrowband wireless communication module and / or the number of accessed broadband devices is greater than the access number threshold of the broadband wireless communication module, increasing the number of narrow-wideband converging node devices at the corresponding location.

[0015] Optionally, the data information includes one or more of data size, transmission and reception frequency, Determining the communication mode of each device to be connected according to the data information specifically includes: If only one of the data size or the transceiver frequency is obtained, then, if the obtained data size is less than the preset data size threshold or the obtained transceiver frequency is less than the preset transceiver frequency threshold, determine that the communication mode of the device to be connected is narrowband communication; If both the data size and the transceiver frequency are obtained, then, if the obtained data size is less than the preset data size threshold and the obtained transceiver frequency is less than the preset transceiver frequency threshold, determine that the communication mode of the device to be connected is narrowband communication.

[0016] Optionally, the data information includes the data usage; the device types of the devices to be connected include on-line monitoring devices, remote inspection devices, and operation and maintenance management devices; Determining the communication mode of each device to be connected according to the data information is specifically as follows: If the data usage is the sensor data of an on-line monitoring device, determine that the communication mode of the device to be connected is narrowband communication; If the data usage is the video stream data of a remote inspection device or the operation and maintenance data of an operation and maintenance management device, determine that the communication mode of the device to be connected is broadband communication.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention proposes a wide-narrow fusion convergence node device, which can be set in a substation. When receiving a communication connection request from a device to be connected, it selects a suitable broadband protocol or narrowband protocol for the device to be connected from the adaptive protocol library, and establishes a communication connection with the device to be connected according to the selected broadband protocol and narrowband protocol. The wide-narrow fusion convergence node device can simultaneously and compatibly connect broadband devices and narrowband devices, reducing the cost of deploying a wireless network in the substation and eliminating the need for separate networking of broadband devices and narrowband devices.

[0018] (2) The wide-narrow fusion convergence node device proposed by the present invention can also adaptively determine relevant protocols, meet the connection requirements of various devices, improve the connection efficiency of establishing communication connections with various devices, and reduce the connection cost.

[0019] (3) The present invention provides a method for determining the position of a wide-narrow fusion convergence node device, which can ensure the least number of wide-narrow fusion convergence node devices set while satisfying the maximum signal strength, and reduce the device cost on the premise of ensuring communication quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of wireless networking of multiple types of devices in the prior art; Figure 2 is a schematic diagram of broadband fusion wireless networking in a substation according to an exemplary embodiment of the present invention; Figure 3 Schematic diagram of the structure of the wide - narrow integration convergence node device of the present invention; Figure 4 Schematic diagram of the wide - narrow integration convergence node device according to an exemplary embodiment of the present invention; Figure 5 Schematic diagram of the wide - narrow integration convergence node device according to another exemplary embodiment of the present invention; Figure 6 Schematic diagram of the broadband integrated wireless networking of a substation according to another exemplary embodiment of the present invention; Figure 7 Arrangement schematic diagram of the wide - narrow integration convergence node device according to an exemplary embodiment of the present invention; Figure 8 Block diagram of the structure of a computing device according to an exemplary embodiment of the present invention. Detailed implementation manners

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and gives detailed implementation manners and specific operation procedures, but the protection scope of the present invention is not limited to the following embodiments.

[0022] Embodiment 1 Figure 1 Shows a schematic diagram of the wireless networking structure of multiple types of devices in the prior art. As Figure 1 shown, narrow - band devices and broadband devices are deployed in a substation. The narrow - band devices and broadband devices use different methods for wireless networking respectively.

[0023] Among them, the narrow - band devices are 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 narrow - band devices are connected to the edge physical proxy device, narrow - band communication is used. Narrow - band communication (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 a better coverage range in the case of long distances. Narrow - band communication can be specifically implemented as communication technologies such as NB - IoT, LoRa, Sigfox, etc. The narrow - band devices can be specifically implemented as sensor devices, and the present invention does not limit the specific implementation manners of the narrow - band devices.

[0024] According to an embodiment of the present invention, the edge physical proxy device can be specifically implemented as an edge device in a narrow - band communication network to implement functions such as network management and data forwarding. The first network server is used to forward the narrow - band data received from the narrow - band devices to the first backend server.

[0025] When broadband devices are connected to a router, broadband communication is adopted. Broadband communication mainly uses high-frequency signals to transmit data, with a very high transmission rate but a limited coverage range. Broadband communication can be specifically implemented as communication technologies such as 4G, 5G, and WiFi. The broadband devices send broadband data to the second backend server through a router, a switch, and a second network server. The broadband devices can be specifically implemented as devices that use broadband for communication. The present invention does not limit the specific implementation manner of the broadband devices.

[0026] Figure 2 FIG. shows a schematic diagram of a substation broadband convergence wireless networking according to an exemplary embodiment of the present invention. As Figure 2 shown, narrowband devices and broadband devices are communicatively connected to a narrowband and broadband convergence node device, and the narrowband and broadband convergence node device is connected to an authentication server through an access switch. The authentication server and the access switch are also connected to a narrowband and broadband access controller.

[0027] According to an embodiment of the present invention, the communication mode of the narrowband devices includes narrowband communication, the communication mode of the broadband devices includes broadband communication, or the communication mode of the narrowband devices is narrowband communication, and the communication mode of the broadband devices is broadband communication.

[0028] The narrowband devices specifically include on-line monitoring devices, such as various sensors. In a substation, the on-line monitoring devices are mainly narrowband wireless communication devices mainly used for environmental monitoring, and can be specifically implemented as sensors for monitoring equipment temperature, ambient temperature and humidity, partial discharge, leakage current, SF6 gas leakage, etc. The amount of data transmitted each time is about several hundred bytes, and the data is mostly reported periodically. Table 1 shows the information of some narrowband devices: Table 1 Narrowband Device Information

[0029] The broadband devices specifically include remote inspection devices and operation and maintenance management devices. In a substation, the remote inspection devices mainly include devices for security monitoring, anti-theft, and personnel monitoring in the station, including robots, cameras, and drones, etc. The data transmitted includes inspection data of real-time video streams, and a high-bandwidth and real-time network is adopted. The operation and maintenance management devices mainly include devices for supporting various operation behaviors of on-site personnel, including handheld terminals (including live detection instruments), intelligent safety helmets, etc. By tracking trajectories and positioning personnel, the on-site personnel's inspection operations, switching operations, live maintenance, etc. are standardized, and data such as human faces, personnel behaviors, and voices are required to be collected. The network requirements are the same as those of the remote inspection devices, and a high-bandwidth and real-time network is needed. Table 2 shows the information of some broadband devices: Table 2 Broadband Device Information

[0030] According to an embodiment of the present invention, the narrow-wideband convergence node device receives narrowband data sent by narrowband devices and broadband data sent by broadband devices.

[0031] According to an embodiment of the present invention, as Figure 3 shown, the narrow-wideband convergence node device includes a processing module, one or more narrowband wireless communication modules, and one or more broadband wireless communication modules.

[0032] The narrowband wireless communication module is configured to, when the determined communication mode of the device to be accessed is narrowband communication, in response to a communication connection request sent by a narrowband device, obtain the wireless networking protocol of the power transmission and transformation equipment Internet of Things node device from the adaptive protocol library, and establish a communication connection with the narrowband device according to the wireless networking protocol of the power transmission and transformation equipment Internet of Things node device.

[0033] The broadband wireless communication module is configured to, when the determined communication mode of the device to be accessed is broadband communication, in response to a communication connection request sent by a broadband device, obtain the WAPI protocol from the adaptive protocol library, and establish a communication connection with the broadband device according to the WAPI protocol.

[0034] The processing module is adapted to parse the narrowband data sent by the narrowband device according to the wireless networking protocol of the power transmission and transformation equipment Internet of Things node device, determine the monitored object, the monitoring data, and the monitoring time, encapsulate the monitored object, the monitoring data, and the monitoring time according to a preset format in a preset encapsulation format to obtain narrowband encapsulated data, parse the received broadband data according to the WAPI protocol, determine the monitored object, the monitoring data, and the monitoring time, and encapsulate the monitored object, the monitoring data, and the monitoring time according to a preset format in a preset encapsulation format to obtain broadband encapsulated data.

[0035] Figure 4 Shows a schematic diagram of a narrow-wideband convergence node device according to an exemplary embodiment of the present invention. As Figure 4 shown, the narrow-wideband convergence node device includes a central processing unit for processing the received broadband data and narrowband data; and also includes a memory for storing the received broadband data and narrowband data, etc.

[0036] According to an embodiment of the present invention, the narrow-wideband 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 narrow-wideband convergence node device, nor does it limit the specific frequency bands covered by the narrowband wireless communication modules or broadband wireless communication modules.

[0037] According to an embodiment of the present invention, a narrow-wideband convergence node device may include three narrowband wireless communication modules and one broadband wireless communication module.

[0038] According to an embodiment of the present invention, the frequency bands covered by the narrowband wireless communication modules in the narrow-wideband convergence node device may include the 470M and 2.4G frequency bands, etc., and the frequency bands covered by the broadband wireless communication module may include the 2.4G and 5G frequency bands, etc.

[0039] According to an embodiment of the present invention, the communication protocol adopted by the narrowband wireless communication modules in the narrow-wideband convergence node device for narrowband communication with narrowband devices includes the wireless networking protocol for power transmission and transformation equipment Internet of Things node devices. The wireless networking protocol for power transmission and transformation equipment Internet of Things node devices is a communication protocol that standardizes the networking communication of node devices in the perception layer of the power transmission and transformation equipment Internet of Things, and is a protocol specified to achieve the standardized networking and data transmission of node devices.

[0040] The communication protocol adopted by the broadband wireless communication module for broadband communication with broadband devices includes the WAPI protocol, that is, Wireless LAN Authentication and Privacy Infrastructure, which is called Wireless Local Area Network Authentication and Confidentiality Infrastructure in Chinese. It is a security protocol and also a mandatory standard for wireless local area network security in China.

[0041] Figure 5 The schematic diagram of the narrow-wideband convergence node device according to another exemplary embodiment of the present invention is shown. As Figure 5 shown, the narrow-wideband convergence node device includes a central processor and a memory, a node networking protocol communication module, a first micro-power wireless communication module, and a second micro-power wireless communication module as narrowband wireless communication modules. The communication frequency band adopted by the node networking protocol communication module includes 470M, which can be used for narrowband communication with other narrow-wideband convergence node devices, sensor devices that communicate in a low-power mode, etc. Sensor devices that communicate in a low-power mode specifically include devices with a small amount of data transmitted each time, such as less than 100Kb or less than 200b, etc. The communication frequency bands adopted by the first micro-power wireless communication module and the second micro-power wireless communication module include 2.4G. The devices for narrowband communication of the node networking protocol communication module, the first micro-power wireless communication module, and the second micro-power wireless communication module include narrowband devices, such as on-line monitoring devices.

[0042] According to an embodiment of the present invention, the wide-and-narrowband convergence node device further includes a WAPI wireless communication module as a broadband wireless communication module. The communication frequency bands adopted by the WAPI wireless communication module include 2.4G and 5G. The devices for which the WAPI wireless communication module conducts broadband communication include broadband devices, such as remote inspection devices and operation and maintenance management devices.

[0043] According to an embodiment of the present invention, the wide-and-narrowband convergence node device is also provided with an optical fiber or network cable interface for connecting to devices such as an access switch to perform data exchange.

[0044] Back to Figure 2 , the access switch is used to realize data exchange among the authentication server, the wide-and-narrowband access controller, and the wide-and-narrowband convergence node device.

[0045] The authentication server can be specifically implemented as a broadband and narrowband authentication server (AS). The authentication server is generally deployed in a centralized manner at the substation main station and communicates with the substation substations. The authentication server can be deployed in a primary and standby mode. The authentication server is suitable for managing the digital certificates of broadband devices, narrowband devices, and wide-and-narrowband access controllers, including certificate issuance, certificate authentication, certificate recycling, etc.

[0046] The wide-and-narrowband access controller, that is, the wide-and-narrowband AC, is an edge computing device that supports wide-and-narrowband convergence communication. It is generally deployed in the secondary room cabinet. It is a management device for wide-and-narrowband wireless networks in the substation. At the same time, it realizes wide-and-narrowband network coverage, supports wide-and-narrowband network management functions, has the AC function of the broadband network WAPI built-in, and has all the functions of the access node in the wireless networking protocol of the original narrowband power transmission and transformation equipment Internet of Things node devices. According to different voltage levels, the wide-and-narrowband AC can be selectively deployed in the substation, regional centralized control, city, or province to converge the service data of all wide-and-narrowband convergence node devices, that is, wide-and-narrowband fusion APs, and forward them externally in a unified manner. It supports the management of all wide-and-narrowband fusion AP devices, including the registration, networking, and configuration distribution of wide-and-narrowband fusion APs.

[0047] Figure 6 Shows a schematic diagram of a substation broadband fusion wireless networking according to another exemplary embodiment of the present invention. As Figure 6 shown, the dotted lines represent wireless network connections. The wireless network includes a broadband network and a narrowband network, and the solid lines represent wired networks.

[0048] Narrowband devices include on-line monitoring wireless temperature and humidity sensors, voiceprint monitoring sensors, and environmental noise sensors; broadband devices include drones, robots, bullet cameras, and intelligent monitoring mobile terminals for remote inspection, as well as safety helmets and handheld terminals for operation and maintenance management.

[0049] According to an embodiment of the present invention, narrowband devices communicate with a narrow-wideband integrated AP in narrowband, and broadband devices communicate with a narrow-wideband integrated AP in broadband. Multiple narrow-wideband integrated convergence node devices, i.e., narrow-wideband integrated APs, can be distributedly deployed in a substation. The present invention does not limit the number and deployment method of the specifically deployed broadband integrated convergence node devices.

[0050] According to an embodiment of the present invention, when deploying one or more narrow-wideband integrated convergence node devices, one or more wireless access points APs for broadband communication can also be supplementarily set for the broadband network, such as a WAPI wireless access point AP that uses the WAPI protocol for broadband communication, simply referred to as a WAPI AP.

[0051] According to an embodiment of the present invention, the narrowband integrated convergence node device, i.e., the narrow-wideband integrated AP, can be connected to a narrow-wideband access controller (AC) or a core switch through one of the access switches. Among them, the core switch can be set in the mode of a main machine and a standby machine. The narrowband integrated convergence node device, i.e., the narrow-wideband integrated AP, can also be connected to the core switch through an optical network unit, an optical splitter, and an optical line terminal.

[0052] The narrowband integrated convergence node device, i.e., the narrow-wideband integrated AP, can also be connected to other switches of the main station through the core switch of the substation, and be connected to the authentication server deployed in the main station through other switches of the main station. The authentication server is also connected to the integrated network device, and the core switch is also connected to the main station system and is provided with a firewall.

[0053] A forward isolation device and a reverse isolation device are also set between the substation and the main station and are connected to the integrated application host in the production control area.

[0054] Embodiment 2 According to an embodiment of the present invention, when installing narrow-wideband integrated convergence node devices in a substation, it is necessary to reasonably arrange multiple narrow-wideband integrated convergence node devices according to the data acquisition requirements in the substation and the locations where the narrow-wideband integrated convergence node devices can be installed. If there is still a demand for a broadband network but it is not covered, one or more wireless access points APs for broadband communication, such as WAPI wireless access point APs, need to be set to meet the corresponding network requirements. Therefore, this embodiment provides a method for determining the location of narrow-wideband integrated convergence node devices.

[0055] According to an embodiment of the present invention, when setting narrow-wideband integrated convergence node devices, first obtain a floor plan of the substation. The floor plan of the substation includes the building walls of the substation, the main equipment of the substation, broadband devices, and narrowband devices. The specific locations of the building walls of the substation, the main equipment of the substation, broadband devices, and narrowband devices are marked on the floor plan of the substation.

[0056] The building walls of the substation include the perimeter wall of the substation, the outer and inner walls of buildings such as houses. The main equipment of the substation is the equipment that maintains the normal operation of the substation, such as transformers, etc. The broadband equipment and narrowband equipment are suitable for monitoring the status of the substation environment, the main equipment of the substation, etc.

[0057] Since the building walls of the substation and the main equipment of the substation will both have a certain impact on the signal transmission of the broadband equipment and narrowband equipment, when the signal of the wide - narrow fusion convergence node equipment passes through the building wall or bypasses the substation, certain attenuation will occur.

[0058] According to an embodiment of the present invention, a substation wall signal attenuation coefficient is set for the signal attenuation caused by the substation wall. The substation wall signal attenuation coefficient can be determined according to the thickness and material of different substation walls. Specifically, it can also be obtained through actual testing and can also be preset, such as set to 0.7. When the signal of the wide - narrow fusion convergence node equipment passes through the substation wall once, the signal strength will be multiplied by the substation wall signal attenuation coefficient once.

[0059] The present invention also sets a substation main equipment signal attenuation coefficient for the signal attenuation caused by the substation main equipment. The substation main equipment signal attenuation coefficient can be determined according to the size of different substation main equipment and the electromagnetic effect generated when the substation main equipment is working. Specifically, it can also be obtained through actual testing and can also be preset, such as set to 0.8. When the signal of the wide - narrow fusion convergence node equipment bypasses the substation equipment once, the signal strength will be multiplied by the substation main equipment signal attenuation coefficient once.

[0060] According to an embodiment of the present invention, a wide - narrow fusion convergence node equipment position determination model can be established to determine the installation position of the wide - narrow fusion convergence node equipment.

[0061] According to an embodiment of the present invention, the wide - narrow fusion convergence node equipment position determination model determines the target by determining the signal strength sum function that characterizes the signal strength between the broadband equipment and the narrowband equipment. The target is to minimize the number of narrow - band fusion convergence node equipment on the premise that the signal strength sum function is the largest. Its decision variables include the number of wide - narrow fusion convergence node equipment and the position coordinates of each wide - narrow fusion convergence node equipment position.

[0062] The position coordinates of each wide - narrow fusion convergence node equipment position include the abscissa x and the ordinate y , the position coordinates of the wide - narrow fusion convergence node equipment position can be represented by longitude and latitude respectively, and can also be determined by establishing a coordinate system with the floor plan of the substation. The present invention does not limit the specific representation method of the position coordinates of the wide - narrow fusion convergence node equipment position. It is preset that a total ofk If there is a narrow-wideband convergence node device, then the position coordinates of the t narrow-wideband convergence node device position include ( ). t Indicates the t narrow-wideband convergence node device. t The value range of k is 1 -

[0063] The substation includes m narrowband devices and n broadband devices. Similar to the representation method of the position coordinates of the narrow-wideband convergence node device, i Indicates the i narrowband device. i The value range of m is 1 - l Indicates the l broadband device. l The value range of n is 1 - i The position coordinates of the narrowband device include ( l ), and the position coordinates of the broadband device include (

[0064] According to the position coordinates of the i narrowband device ( ) and the position coordinates of the t narrow-wideband convergence node device position ( ), determine the straight-line distance apart, including:

[0065] According to the position coordinates of the l broadband device ( ) and the position coordinates of the t narrow-wideband convergence node device position ( ), determine the straight-line distance apart, including:

[0066] The theoretical signal strength of the signal transmitted from the t narrow-wideband convergence node device to the i narrowband device is , and the theoretical signal strength of the signal transmitted from the t narrow-wideband convergence node device to the l narrowband device is . It is the theoretical signal strength function of the wide - narrow fusion convergence node device and is related to the distance from the receiving device. It can be obtained according to steps such as surveying and mapping, fitting, etc.

[0067] Subsequently, set to determine the number of substation walls and the number of main substation equipment separated between the wide - narrow fusion convergence node device and the narrow - band device or broadband device according to the connection lines of each wide - narrow fusion convergence node device with the narrow - band device or broadband device on the floor plan of the substation. The t th wide - narrow fusion convergence node device and the i th narrow - band device are separated by substation walls, and the number of main substation equipment separated is ; the t th wide - narrow fusion convergence node device and the l th broadband device are separated by substation walls, and the number of main substation equipment separated is .

[0068] If the signal attenuation coefficient of the substation wall is α and the signal attenuation coefficient of the main substation equipment is β, then the actual signal strength when the signal of the t - th wide - narrow fusion convergence node device is transmitted to the i th narrow - band device is: ; the actual signal strength when the signal of the t th wide - narrow fusion convergence node device is transmitted to the l th broadband device is .

[0069] In the present invention, set each narrow - band device or broadband device to select the wide - narrow fusion convergence node device with the maximum actual signal strength for connection. Then the connection signal strength of the i th narrow - band device is the maximum value of the actual signal strength between the i th narrow - band device and the k th wide - narrow fusion convergence node device - (that is, when taking 1 - (also that is t taking 1 - k ), is the maximum value), and the connection signal strength of the l th broadband device is the maximum value of the actual signal strength between the l th narrow - band device and the k th wide - narrow fusion convergence node device - (that is, when taking 1 - (also that is t taking 1 - k ), is the maximum value).

[0070] 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 total signal strength function is:

[0071] where, G is the total signal strength, i 、 l respectively represent the i th narrowband device and the l th broadband device in the substation, i ranges from 1 to m , m is the number of narrowband devices in the substation, l ranges from 1 to n , n is the number of broadband devices in the substation, is the theoretical signal strength function of the narrowband and broadband convergence node device, , respectively represent the i th narrowband device and the l th broadband device's straight-line distance from the t th narrowband and broadband convergence node device in the floor plan of the substation, and respectively represent the substation wall signal attenuation coefficient and the substation main equipment signal attenuation coefficient in the substation, and respectively represent the number of substation walls and the number of substation main equipment separated between the t th narrowband and broadband convergence node device and the i th narrowband device, and respectively represent the number of substation walls and the number of substation main equipment separated between the t th narrowband and broadband convergence node device and the l th broadband device, is the connection signal strength of the i th narrowband device, i ranges from [1, m , is the connection signal strength of the l th narrowband device, l ranges from [1, n .

[0072] The constraint conditions for solving the narrowband and broadband convergence node device location determination model include: The connection signal strength of each narrowband device needs to be greater than the first preset threshold , is the connection signal strength required for the normal operation of the i-th narrowband device.

[0073]

[0074] The connection signal strength of each broadband device needs to be greater than the second preset threshold , is the connection signal strength required for the normal operation of the l-th broadband device.

[0075]

[0076] By solving the narrow-wideband fusion convergence node device location determination model according to the constraint conditions, the number of narrow-wideband fusion convergence node devices set in the substation and the setting position of each narrow-wideband fusion convergence node device can be determined.

[0077] According to an embodiment of the present invention, when solving the narrow-wideband fusion convergence node device determination model according to the constraint conditions, the particle swarm optimization algorithm or other methods can be used to solve the model. When solving this model, various algorithms can be selected, and the present invention does not limit the specific type of algorithm selected.

[0078] According to an embodiment of the present invention, if the network demand of the broadband device is high when determining the number and location of the narrow-wideband fusion convergence node device and cannot be met only by the narrow-wideband fusion convergence node device, 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 demand.

[0079] The process of determining the setting position of the narrow-wideband fusion convergence node device further includes: obtaining one or more of the data size, transmission and reception frequency, and data usage for the data to be transmitted and received by the device to be accessed, and determining the communication method of each device to be accessed according to one or more of the data size, transmission and reception frequency, and data usage; according to the communication method of each device to be accessed, 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 narrow-wideband fusion convergence node device to be set; judging whether the number of accessed narrowband devices is greater than the narrowband wireless communication module access number threshold, and whether the number of accessed broadband devices is greater than the broadband wireless communication module access number threshold; if the number of accessed narrowband devices is greater than the narrowband wireless communication module access number threshold and / or the number of accessed broadband devices is greater than the broadband wireless communication module access number threshold, the number of narrow-wideband fusion convergence node devices to be set is increased at the corresponding position.

[0080] According to an embodiment of the present invention, when increasing the number of narrow-wideband convergence node devices to be set at corresponding positions, at the positions where 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, narrow-wideband convergence node devices are added until the limit requirements of the access number threshold of the narrowband wireless communication module and the access number threshold of the broadband wireless communication module are met.

[0081] According to an embodiment of the present invention, the data size to be transmitted and received can be the data size that needs to be transmitted at one time, or the data size that needs to be transmitted per minute or per second. The transmission and reception frequency determines the cycle length of each data transmission, such as once per minute, etc. The data usage includes the descriptive information of the data, such as the sensor data of the online monitoring device for monitoring a certain index; the video stream data of the remote inspection device for security monitoring; the operation and maintenance data of the operation and maintenance management device for manual inspection of equipment, personnel positioning, etc.

[0082] When determining the communication mode, if it is determined that the data size is less than the preset data size threshold and / or the transmission and reception frequency is less than the preset transmission and reception frequency threshold, the communication mode is determined to be narrowband communication; otherwise, the communication mode is determined to be broadband communication. According to an embodiment of the present invention, the preset data size threshold can be set to 200 kb, and the preset transmission and reception frequency threshold can be set to once per minute.

[0083] When determining the communication mode, if the data usage is the sensor data of the online monitoring device for monitoring a certain index, the communication mode is determined to be narrowband communication; if the data usage is the video stream data of the remote inspection device for security monitoring, or the operation and maintenance data of the operation and maintenance management device for manual inspection of equipment, personnel positioning, etc., the communication mode is determined to be broadband communication.

[0084] Figure 7 Shows a layout diagram of the narrow-wideband convergence node device according to an exemplary embodiment of the present invention. As Figure 7 shown, multiple narrow-wideband convergence node devices and WAPI wireless access points AP are arranged in the substation. Taking the narrow-wideband convergence node device or the WAPI wireless access point AP as the center, the circle made represents the device range accessing the narrow-wideband convergence node device or the WAPI wireless access point AP.

[0085] According to an embodiment of the present invention, an adaptive protocol library is further provided in the wide and narrow integration convergence node device to meet the connection requirements of various devices, including broadband devices and narrowband devices. According to an embodiment of the present invention, after multiple wide and narrow integration convergence node devices are set up in a substation, the wide and narrow integration convergence node devices start to work, send out AP signals, and broadband devices and narrowband devices can select the one wide and narrow integration convergence node device with the strongest signal that can be searched to send a communication connection request to the target wide and narrow integration convergence node device.

[0086] According to an embodiment of the present invention, when broadband devices and narrowband devices send communication connection requests, since different devices may have multiple communication methods, one of the communication methods can be selected according to the data to be sent and received for communication.

[0087] As Figure 3 shown, the wide and narrow integration convergence node device includes: A narrowband wireless communication module, which is used to, when the communication method of the to-be-connected device determined is narrowband communication, in response to the communication connection request sent by the narrowband device, obtain the wireless networking protocol of the power transmission and transformation equipment Internet of Things node device from the adaptive protocol library, and establish a communication connection with the narrowband device according to the wireless networking protocol of the power transmission and transformation equipment Internet of Things node device; A broadband wireless communication module, which is used to, when the communication method of the to-be-connected device determined is broadband communication, in response to the communication connection request sent by the broadband device, obtain the WAPI protocol from the adaptive protocol library, and establish a communication connection with the broadband device according to the WAPI protocol; A processing module, which is used to, after establishing a communication connection with the narrowband device, parse the narrowband data sent by the narrowband device received according to the wireless networking protocol of the power transmission and transformation equipment Internet of Things node device, determine the monitored object, monitoring data, and monitoring time, and encapsulate the monitored object, monitoring data, and monitoring time according to a preset format according to a preset encapsulation format to obtain narrowband encapsulated data; and, after establishing a communication connection with the broadband device, parse the broadband data sent by the broadband device received 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 format according to a preset encapsulation format to obtain broadband encapsulated data.

[0088] After the processing module receives narrowband data from the narrowband wireless communication module, it parses the narrowband data according to the narrowband communication protocol, such as the wireless networking protocol for Internet of Things nodes of power transmission and transformation equipment, to determine the monitored object, monitoring data, and monitoring time. The monitored object includes substation environment, substation equipment, etc. The 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 is monitored.

[0089] According to an embodiment of the present invention, after the processing module receives broadband data from the broadband wireless communication module, it parses the broadband data according to the broadband communication protocol, such as the WAPI protocol, to determine the monitored object, monitoring data, and monitoring time. The monitored object includes substation equipment, operation and maintenance personnel, etc. The monitoring data includes monitoring items and the corresponding monitoring data. The monitoring data can be specifically implemented as video data or image data, and the present invention does not limit the specific type of the monitoring data. The monitoring time is the time when the data is monitored.

[0090] Subsequently, the processing module encapsulates the monitored object, monitoring data, and monitoring time according to the preset format into a narrowband encapsulated data according to the preset encapsulation format, and the processing module encapsulates the monitored object, monitoring data, and monitoring time according to the preset format into a broadband encapsulated data according to the preset encapsulation format.

[0091] When the processing module encapsulates the monitored object, monitoring data, and monitoring time according to the preset encapsulation format, it labels the narrowband encapsulated data according to the monitoring time and the monitored object, so as to sort the narrowband encapsulated data according to the monitoring time, classify the narrowband encapsulated data according to the monitored object, and parse the narrowband encapsulated data according to a unified parsing method to obtain the monitoring data, so as to further process the monitoring data.

[0092] When the processing module encapsulates the monitored object, monitoring data, and monitoring time according to the preset encapsulation format, it labels the broadband encapsulated data according to the monitoring time and the monitored object, so as to sort the broadband encapsulated data according to the monitoring time, classify the broadband encapsulated data according to the monitored object, and parse the broadband encapsulated data according to a unified parsing method to obtain the monitoring data, so as to further process the monitoring data.

[0093] According to an 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 monitoring data at the tail of the encapsulated data to implement data encapsulation. The present invention does not limit the specific form of the preset encapsulation format. Encapsulating broadband data and narrowband data according to the same preset encapsulation format can improve the efficiency of data encapsulation, transmission, and parsing, and there is no need to separately set up transmission links and transmission requirements for broadband data and narrowband data, reducing the cost of data transmission and processing.

[0094] Embodiment 3 The wide-narrow fusion convergence node device of the present invention can be specifically implemented as a computing device. Figure 8 The schematic diagram of a computing device 800 according to an exemplary embodiment of the present invention is shown.

[0095] As Figure 8 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. Among them, the central processing unit 810, the memory 820, the input / output interface 830, and the communication interface 840 are communicatively connected to each other inside the computing device through the bus 850.

[0096] The central processing unit 810 can be implemented in a general CPU (Central Processing Unit), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0097] The memory 820 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), a static storage device, a dynamic storage device, etc. The memory 820 can store an operating system and other application programs. When implementing the technical solutions provided in the embodiments of this specification through software or firmware, the relevant program codes are stored in the memory 820 and are called and executed by the central processing unit 810.

[0098] The input / output interface 830 is used to connect to the input / output module to implement information input and output. The communication interface 840 is used to implement the communication interaction between this computing device and other devices. The bus 850 includes a path for transmitting information between various components of the computing device (such as the central processing unit 810, the memory 820, the input / output interface 830, and the communication interface 840).

[0099] It should be noted that although the above computing device only shows the central processing unit 810, the memory 820, the input / output interface 830, the communication interface 840, and the bus 850, in the specific implementation process, the computing device may further include other components necessary for normal operation. In addition, those skilled in the art can understand that the above computing device may also only include the components necessary to implement the solution of the embodiments of this specification, and does not necessarily include all the components shown in the figure.

[0100] As used herein, unless otherwise specified, the use of ordinal numbers "first", "second", "third", etc. to describe ordinary objects only indicates different instances of similar objects, and is not intended to imply that the objects so described must have a given order in terms of time, space, sorting, or any other way.

[0101] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A wide and narrow integration convergence node device for communicating and connecting with devices to be accessed, where the devices to be accessed include broadband devices and narrowband devices, and is characterized in that, The wide - narrowband integrated convergence node device adaptively selects a communication protocol through a narrowband wireless communication module and a broadband wireless communication module, and establishes communication connections with broadband devices and narrowband devices.

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

3. The wide-narrow fusion convergence node device according to claim 2, characterized in that, The preset encapsulation format is: write the monitoring data and monitoring time, or the monitoring data and monitoring time at the head of the corresponding encapsulated data, and write the monitoring data or monitoring data at the tail of the corresponding encapsulated data to implement data encapsulation.

4. A method for determining the location of a wide and narrow fusion convergence node device as described in any one of claims 1-3, characterized in that, The method includes the following steps: Construct a wide - narrowband integrated convergence node device location determination model, determine the signal strength sum function representing the signal strength between broadband devices and narrowband devices, the goal of the wide - narrowband integrated convergence node device location determination model is to minimize the number of wide - narrowband integrated convergence node devices set under the premise of the maximum signal strength sum function, and the decision variables of the model include the number of wide - narrowband integrated convergence node devices and the position coordinates of each wide - narrowband integrated convergence node device; Solve the wide - narrowband integrated convergence node device location determination model according to the constraint conditions to determine the number of wide - narrowband integrated convergence node devices set in the substation and the location where each wide - narrowband integrated convergence node device is set.

5. The method for determining the position of a narrow-wide fusion convergence node device according to claim 4, wherein The signal strength sum function is: ， in, G is the total signal strength, i , l Respectively represent the first i Narrowband devices, l Broadband devices, i The value range is 1 to m , m is the number of narrowband devices in the substation, l The value range is 1 to n , n is the number of broadband devices in the substation, is the theoretical signal strength function of the broadband and narrowband fusion aggregation node device, , Respectively i Narrowband devices, l The broadband equipment is located in the substation plan. t The straight-line distance between the broadband and narrowband convergence node devices, and They are the signal attenuation coefficient of the substation wall and the signal attenuation coefficient of the main equipment in the substation. and Respectively t A broadband and narrowband convergence node device and i The number of substation walls and main equipment in the substation between narrowband devices, and Respectively t A broadband and narrowband convergence node device and l The number of substation walls and the number of substation main equipment between broadband devices, For the i The connection signal strength of narrowband devices, For the l The connection signal strength of a narrowband device.

6. The method for determining the position of a wide and narrow fusion convergence node device according to claim 5, characterized in that The connection signal strength of the i th narrowband device is the maximum value among the actual signal strengths between the i th narrowband device and the k wide-narrowband fusion convergence node devices in - . The connection signal strength of the l th narrowband device is the maximum value among the actual signal strengths between the l th narrowband device and the k wide-narrowband fusion convergence node devices in - , where k is the number of wide-narrowband fusion convergence node devices.

7. A method for determining the location of a narrow-wide fusion convergence node device according to claim 5, characterized in that, The constraint conditions include: ， ， Among them, is the connection signal strength required for the i th narrowband device to work properly, and l is the connection signal strength required for the 8. The method for determining the position of a wide and narrow fusion convergence node device according to claim 4, characterized in that The process of determining the setting position of the wide - narrowband integrated convergence node device further includes: Obtain the data information of the data to be sent and received by the device to be accessed, and determine the communication mode of each device to be accessed according to the data information; According to the communication mode of each device to be accessed, determine the number of narrowband devices accessed by the narrowband wireless communication module in the wide - narrowband integrated convergence node device and the number of broadband devices accessed by the broadband wireless communication module. Determine whether the number of narrowband devices connected is greater than the access quantity threshold of the narrowband wireless communication module, and whether the number of broadband devices connected is greater than the access quantity threshold of the broadband wireless communication module; If the number of narrowband devices connected is greater than the access quantity threshold of the narrowband wireless communication module and / or the number of broadband devices connected is greater than the access quantity threshold of the broadband wireless communication module, increase the number of narrowband-wideband convergence node devices at the corresponding position.

9. The method for determining the position of a wide-narrow fusion convergence node device according to claim 8, wherein The data information includes one or more of data size and transceiver frequency, Specifically, determining the communication mode of each device to be connected according to the data information is as follows: If only one of the data size or transceiver frequency is obtained, then, if the obtained data size is less than the preset data size threshold or the obtained transceiver frequency is less than the preset transceiver frequency threshold, determine that the communication mode of the device to be connected is narrowband communication; If both the data size and transceiver frequency are obtained, then, if the obtained data size is less than the preset data size threshold and the obtained transceiver frequency is less than the preset transceiver frequency threshold, determine that the communication mode of the device to be connected is narrowband communication.

10. The method for determining the location of a wide and narrow fusion convergence node device according to claim 8, characterized in that, The data information includes data usage; the device types of the devices to be connected include on-line monitoring devices, remote inspection devices, and operation and maintenance management devices; Specifically, determining the communication mode of each device to be connected according to the data information is as follows: If the data usage is the sensor data of the on-line monitoring device, determine that the communication mode of the device to be connected is narrowband communication; If the data usage is the video stream data of the remote inspection device or the operation and maintenance data of the operation and maintenance management device, determine that the communication mode of the device to be connected is broadband communication.

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