A communication method based on a wide and narrow fusion aggregation node device

Abstract

The present invention relates to the field of wireless communication, and discloses a communication method based on a narrow-wideband integrated convergence node device, which is used to realize communication connections between a narrow-wideband access controller, a backend server, an authentication server, and multiple narrow-wideband integrated convergence node devices. Among them, the narrow-wideband access controller performs the following steps: receiving a communication verification request and parsing it, and sending multi-node access device certificates and convergence node device certificates to the authentication server; receiving a second authentication success message sent by the authentication server after the certificate authentication passes; receiving target data content sent by a target narrow-wideband integrated convergence node device and verification data content sent by the verification narrow-wideband integrated convergence node device, and determining whether the target data content is consistent with the verification data content; if they are consistent, uploading the target data content to the backend server. Compared with the prior art, the present invention has the advantages of being able to improve the integrity and accuracy of data transmission, etc.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication, and in particular, to a communication method based on a wide and narrow fusion aggregation node device. 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 forms a network according to its own network requirements. The management of this networking mode is difficult, the networking cost is high, and the technology is relatively complex. CN116436943A discloses a communication system and method applied to the Internet of Things for power transmission and transformation equipment, including a wide and narrowband fusion core network, a fusion gateway, an access controller, an access node, an aggregation node, and a sensor terminal that are sequentially communicatively connected; 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 terminal is divided into a wired sensor terminal and a wireless sensor terminal; the number of the aggregation node, the wired sensor terminal, and the wireless sensor terminal is set to be multiple; the access node and the aggregation 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, in a substation, there are many live devices, and each live device will generate an electromagnetic field, resulting in a relatively complex electromagnetic environment in the substation. The prior art does not consider that when the access device transmits data, it may be affected by this and phenomena such as data packet loss and data errors may occur. Summary of the Invention

[0004] The purpose of the present invention is to provide a communication method based on a wide and narrow fusion aggregation node device to solve the above-mentioned defects existing in the prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] According to a first aspect of the present invention, there is provided a communication method based on a narrow-wideband integrated convergence node device, which is used to implement communication connections between a narrow-wideband access controller, a backend server, an authentication server, and multiple narrow-wideband integrated convergence node devices. Through the narrow-wideband access controller's verification of the certificates and data content of the access devices, it ensures the secure access of the devices and reliably uploads the data to the backend server.

[0007] Optionally, the method includes the following steps:

[0008] In response to a communication verification request sent by a narrow-wideband integrated convergence node device, the narrow-wideband access controller parses the communication verification request to obtain a multi-node access device certificate and a convergence node device certificate of the device to be accessed. The device to be accessed includes broadband devices and narrowband devices deployed in a substation;

[0009] The narrow-wideband access controller sends the multi-node access device certificate and the convergence node device certificate to the authentication server for the authentication server to perform certificate authentication;

[0010] In response to a second authentication success message sent by the authentication server after successful certificate authentication, the narrow-wideband access controller sends an allow connection message to the narrow-wideband integrated convergence node device, so that the device to be accessed can access the narrow-wideband integrated convergence node device and become an access device;

[0011] In response to the target data content sent by the target narrow-wideband integrated convergence node device and the verification data content sent by the verification narrow-wideband integrated convergence node device, the narrow-wideband access controller verifies the target data content according to the verification data content to determine whether the target data content is consistent with the verification data content; if they are consistent, the target data content is uploaded to the backend server. The target data content, the target narrow-wideband integrated convergence node device, and the verification narrow-wideband integrated convergence node device are determined according to the set of narrow-wideband integrated convergence node devices connected by the access device.

[0012] Optionally, the method further includes the following steps:

[0013] In response to a second device registration request sent by a narrow-wideband integrated convergence node device, the narrow-wideband access controller parses the second device registration request to obtain a first device registration request and a convergence node device certificate of the narrow-wideband integrated convergence node device. The first device registration request is a request sent by the device to be accessed to the narrow-wideband integrated convergence node device and includes device information of the device to be accessed. The device information includes the convergence node device ID of each narrow-wideband integrated convergence node device in the set of narrow-wideband integrated convergence node devices to be connected;

[0014] The narrow-wideband access controller sends the convergence node device certificate to the authentication server;

[0015] The broadband and narrowband access controller responds to the first authentication success message sent by the authentication server after authenticating the aggregation node device certificate, registers the device to be accessed according to the device information, and applies to the authentication server for a multi-node access device certificate of the device to be accessed;

[0016] The broadband and narrowband access controller responds to the multi-node access device certificate made by the authentication server according to the device information, and sends the multi-node device certificate to the device to be accessed through the broadband and narrowband fusion aggregation node device.

[0017] Optionally, if the device to be accessed is a broadband device, the broadband and narrowband fusion aggregation node device receives the first device registration request sent by the device to be accessed according to the broadband wireless communication module; if the device to be accessed is a narrowband device, the broadband and narrowband fusion aggregation node device receives the first device registration request sent by the device to be accessed according to the narrowband wireless communication module.

[0018] Optionally, the broadband and narrowband fusion aggregation node device responds to the communication connection request sent by the device to be accessed, generates a communication verification request according to the communication connection request and the aggregation node device certificate, and sends the communication verification request to the broadband and narrowband access controller. The communication connection request includes the multi-node access device certificate of the device to be accessed.

[0019] Optionally, after receiving the connection permission message, the broadband and narrowband fusion aggregation node device negotiates a secret key with the device to be accessed to determine the session secret key.

[0020] Optionally, the session secret key includes the private key and public key of the broadband and narrowband fusion aggregation node device. The method further includes:

[0021] The broadband and narrowband fusion aggregation node device responds to the encrypted uplink communication data sent by the access device, decrypts the encrypted uplink communication data according to the private key of the broadband and narrowband fusion aggregation node device to obtain the data content of the uplink communication data. The encrypted uplink communication data is encrypted by the access device according to the public key of the broadband and narrowband fusion aggregation node device.

[0022] Optionally, the uplink communication data sent by the access device to the target broadband and narrowband fusion aggregation node device is target uplink communication data, and the target broadband and narrowband fusion aggregation node device determines the target data content according to the target uplink communication data;

[0023] The uplink communication data sent by the access device to the verification broadband and narrowband fusion aggregation node device is verification uplink communication data, and the verification broadband and narrowband fusion aggregation node device determines the verification data content according to the verification uplink communication data.

[0024] Optionally, the device to be connected determines a preset number of narrow-wideband convergence node devices as the narrow-wideband convergence node devices to be connected based on the signal strength of the signals sent by multiple narrow-wideband convergence node devices that can be received, so as to obtain a set of narrow-wideband convergence node devices to be connected.

[0025] Optionally, the device to be connected selects the narrow-wideband convergence node device with the strongest signal in the set of narrow-wideband convergence node devices as the target narrow-wideband convergence node device, and other narrow-wideband convergence node devices in the set of narrow-wideband convergence node devices as the verification narrow-wideband convergence node devices.

[0026] Optionally, verifying the target data content according to the verification data content and determining whether the target data content is consistent with the verification data content includes:

[0027] Determining a first number of target data information included in the target data content and a second number of verification data information included in the verification data content;

[0028] Judging whether the first number is the same as the second number. If they are different, it is judged that there is a packet loss in the target data content. If they are the same, then

[0029] Judging whether the order of each piece of target data information in the target data content is the same as the order of the corresponding piece of verification data information in the verification data content. If they are different, it is judged that there is a data order error in the target data content. If they are the same, then

[0030] Judging whether each piece of target data information is the same as the corresponding piece of verification data information. If they are the same, it is judged that the target data content is consistent with the verification data content. If there is one piece of target data information that is different from the corresponding piece of verification data information, it is judged that there is a data content error in the target data content.

[0031] Optionally, after receiving the target data content, the narrow-wideband access controller uploads the target data content to the backend server for the backend server to process the data;

[0032] After receiving the subsequently sent verification data content, the narrow-wideband access controller verifies the target data content according to the verification data content to determine whether the target data content is consistent with the verification data content;

[0033] If they are inconsistent, a data correction message including the verification data content is sent to the backend server.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The present invention provides a communication method based on a wide - narrowband fusion convergence node device. The wide - narrowband fusion convergence node device can simultaneously access broadband devices and narrowband devices. When performing communication access, there is no need to separately network each type of device. The wide - narrowband fusion convergence node device uniformly sends a communication verification request to the wide - narrowband access controller to implement certificate verification and device access after the certificate verification passes. And when sending and receiving data, the target wide - narrowband fusion convergence node device sends the target data content, and the verification wide - narrowband fusion convergence node device sends the verification data content, so that the wide - narrowband access controller can verify the target data content, avoiding affecting the data transmission of the access device when the electromagnetic environment in the substation is relatively complex. It can reduce the probability of packet loss or data error when important data is transmitted to the backend server, improving data integrity and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of wireless networking of multiple types of devices in the prior art;

[0037] Figure 2 is a schematic diagram of broadband fusion wireless networking in a substation according to an exemplary embodiment of the present invention;

[0038] Figure 3 is a schematic diagram of a wide - narrowband fusion convergence node device according to an exemplary embodiment of the present invention;

[0039] Figure 4 is a schematic diagram of a wide - narrowband fusion convergence node device according to another exemplary embodiment of the present invention;

[0040] Figure 5 is a schematic diagram of broadband fusion wireless networking in a substation according to another exemplary embodiment of the present invention;

[0041] Figure 6 is a flowchart of the communication method according to the present invention;

[0042] Figure 7 is a structural block diagram of a computing device according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] 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 processes, but the protection scope of the present invention is not limited to the following embodiments.

[0044] Embodiment 1

[0045] Figure 1 shows a schematic structural diagram of wireless networking of multiple types of devices in the prior art. As Figure 1As shown in the figure, narrowband devices and broadband devices are deployed in the substation. The narrowband devices and broadband devices use different methods for wireless networking respectively.

[0046] Among them, the narrowband 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 narrowband devices are 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 a better coverage range in the case of long distances. Narrowband communication can be specifically implemented as communication technologies such as NB-IoT, LoRa, Sigfox, etc. The narrowband devices can be specifically implemented as sensor devices, and the present invention does not limit the specific implementation manner of the narrowband devices.

[0047] According to an embodiment of the present invention, the edge physical proxy device can be specifically implemented as an edge device in the narrowband communication network to implement functions such as network management and data forwarding. The first network server is used to forward the narrowband data received from the narrowband devices to the first backend server.

[0048] When the broadband devices are connected to the router, broadband communication is used. Broadband communication mainly uses high-frequency signals to transmit data. The transmission rate is very high, but the coverage range is limited. Broadband communication can be specifically implemented as communication technologies such as 4G, 5G, WiFi, etc. The broadband devices send the broadband data to the second backend server through the router, switch, and the 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.

[0049] Figure 2 Shows a schematic diagram of the broadband fusion wireless networking in the substation according to an exemplary embodiment of the present invention. As Figure 2 shown, the narrowband devices and broadband devices are communicatively connected to the narrowband and broadband convergence node device, and the narrowband and broadband convergence node device is connected to the authentication server through the access switch. The authentication server and the access switch are also connected to the narrowband and broadband access controller.

[0050] According to an embodiment of the present invention, the communication method of the narrowband devices includes narrowband communication, the communication method of the broadband devices includes broadband communication, or the communication method of the narrowband devices is narrowband communication, and the communication method of the broadband devices is broadband communication.

[0051] Narrowband devices specifically include online monitoring devices, such as various sensors. In a substation, online monitoring devices are mainly narrowband wireless communication devices mainly used for environmental monitoring. Specifically, they can be 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:

[0052] Table 1 Information of Narrowband Devices

[0053]

[0054] Broadband devices specifically include remote inspection devices and operation and maintenance management devices. In a substation, remote inspection devices mainly include devices for security monitoring, anti-theft, and personnel monitoring within 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 used. 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, on-site personnel's inspection operations, switching operations, live maintenance, etc. are standardized, and data such as faces, personnel behaviors, and voices need to be collected. The network requirements are the same as those of remote inspection devices, and a high-bandwidth and real-time network is required. Table 2 shows the information of some broadband devices:

[0055] Table 2 Information of Broadband Devices

[0056]

[0057] According to an embodiment of the present invention, 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.

[0058] The narrowband wireless communication module is adapted to, when the communication mode of the device to be accessed is determined to be narrowband communication, in response to a 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.

[0059] The broadband wireless communication module is adapted to, when the communication mode of the device to be accessed is determined to be 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.

[0060] The processing module is adapted to parse the narrowband data sent by narrowband devices according to the wireless networking protocol of power transmission and transformation equipment Internet of Things node devices, 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, parse the received broadband data 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 in a preset encapsulation format to obtain broadband encapsulated data.

[0061] Figure 3 FIG. shows a schematic diagram of a narrow-wideband fusion aggregation node device according to an exemplary embodiment of the present invention. As Figure 3 shown, the narrow-wideband fusion aggregation node device includes a central processor for processing the received broadband data and narrowband data; and also includes a memory for storing the received broadband data and narrowband data, etc.

[0062] According to an embodiment of the present invention, the narrow-wideband fusion aggregation 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 fusion aggregation node device, nor does it limit the specific frequency bands covered by the narrowband wireless communication modules or broadband wireless communication modules.

[0063] According to an embodiment of the present invention, the narrow-wideband fusion aggregation node device may include three narrowband wireless communication modules and one broadband wireless communication module.

[0064] According to an embodiment of the present invention, the frequency bands covered by the narrowband wireless communication modules in the narrow-wideband fusion aggregation node device may include 470M and 2.4G frequency bands, etc., and the frequency bands covered by the broadband wireless communication modules may include 2.4G and 5G frequency bands, etc.

[0065] According to an embodiment of the present invention, the communication protocol adopted by the narrowband wireless communication modules in the narrow-wideband fusion aggregation node device for narrowband communication with narrowband devices includes the wireless networking protocol of power transmission and transformation equipment Internet of Things node devices. The wireless networking protocol of 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 for realizing the standardized networking and data transmission of node devices.

[0066] The communication protocols adopted by the broadband wireless communication module for broadband communication with broadband devices include the WAPI protocol, namely Wireless LAN Authentication and Privacy Infrastructure, which is named Wireless Local Area Network Authentication and Secrecy Infrastructure in Chinese. It is a security protocol and also a mandatory standard for wireless local area network security in China.

[0067] Figure 4 FIG. shows a schematic diagram of a wide-narrow convergence aggregation node device according to another exemplary embodiment of the present invention. As Figure 4 shown, the wide-narrow convergence aggregation 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 wide-narrow convergence aggregation node devices, sensor devices that communicate in a low-power mode, etc. The 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 by 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.

[0068] According to an embodiment of the present invention, the wide-narrow convergence aggregation 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 broadband communication by the WAPI wireless communication module include broadband devices, such as remote inspection devices and operation and maintenance management devices.

[0069] According to an embodiment of the present invention, the wide-narrow convergence aggregation node device is further provided with an optical fiber or network cable interface for connecting to devices such as an access switch for data exchange.

[0070] Return to Figure 2 , and the access switch is used to realize data exchange between the authentication server, the wide-narrow access controller, and the wide-narrow convergence aggregation node device.

[0071] The authentication server can be specifically implemented as a broadband and narrowband authentication server (AS). The authentication server is generally deployed centrally in the substation main station and communicates with the substation sub-station. 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-narrow access controllers, including certificate issuance, certificate authentication, certificate recovery, etc.

[0072] The wide and narrow band access controller, namely the wide and narrow band AC, is an edge computing device that supports wide and narrow band integrated communication. It is generally deployed in the secondary room cabinet and is the management device for the wide and narrow wireless networks in the substation. It simultaneously realizes wide and narrow network coverage, supports wide and narrow band network management functions, has the AC function of the built-in broadband network WAPI, and has all the functions of the access node in the wireless networking protocol of the original narrow band power transmission and transformation equipment Internet of Things node equipment. According to different voltage levels, the wide and narrow band AC can be selectively deployed in the substation, regional centralized control, city or province to converge all the service data of the wide and narrow band integrated convergence node devices, namely the wide and narrow band integrated AP, and forward it externally in a unified manner. It supports the management of all wide and narrow band integrated AP devices, including the registration, networking, and configuration distribution of the wide and narrow band integrated AP.

[0073] Figure 5 FIG. shows a schematic diagram of a substation broadband integrated wireless networking according to another exemplary embodiment of the present invention. As Figure 5 shown, the dashed line represents the wireless network connection, and the wireless network includes a broadband network and a narrow band network, while the solid line represents the wired network.

[0074] The narrow band devices include wireless temperature and humidity sensors, voiceprint monitoring sensors, and environmental noise sensors for on-line monitoring; the broadband devices include drones, robots, ball cameras, intelligent monitoring mobile terminals for remote inspection, and safety helmets and handheld terminals for operation and maintenance management.

[0075] According to an embodiment of the present invention, the narrow band devices communicate with the wide and narrow band integrated AP in narrow band, and the broadband devices communicate with the wide and narrow band integrated AP in broadband. Multiple wide and narrow band integrated convergence node devices, namely the wide and narrow band integrated AP, can be distributedly deployed in the substation. The present invention does not limit the number and deployment method of the specifically deployed broadband integrated convergence node devices.

[0076] According to an embodiment of the present invention, when deploying one or more wide and narrow band integrated convergence node devices, one or more wireless access points AP for broadband communication can also be complementarily set for the broadband network, such as the WAPI wireless access point AP that uses the WAPI protocol for broadband communication, abbreviated as WAPI AP.

[0077] According to an embodiment of the present invention, the narrow band integrated convergence node device, namely the wide and narrow band integrated AP, can be connected to the wide and narrow band access controller (AC) or the 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 narrow band integrated convergence node device, namely the wide and narrow band integrated AP, can also be connected to the core switch through the optical network unit, optical splitter, and optical line terminal.

[0078] The narrowband fusion convergence node device, i.e., the narrow and wideband fusion AP, can also be connected to other switches of the main station through the core switch of the sub-station, and 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 equipped with a firewall.

[0079] A forward isolation device and a reverse isolation device are also set between the sub-station and the main station, and are connected to the integrated application host in the production control area.

[0080] According to an embodiment of the present invention, when deploying narrow and wideband fusion convergence node devices in a substation, it is necessary to reasonably arrange multiple narrow and wideband fusion convergence node devices according to the data acquisition requirements in the substation and the locations where narrow and wideband fusion convergence node devices can be set. If there is a need for a broadband network but it is not covered, one or more wireless access points AP for broadband communication, such as WAPI wireless access points AP, need to be set up to meet the corresponding network requirements.

[0081] Embodiment 2

[0082] According to an embodiment of the present invention, when broadband devices and narrowband devices want to access the narrow and wideband fusion convergence node, the authentication server and the narrow and wideband access controller manage the access and data transmission of broadband devices and narrowband devices.

[0083] According to an embodiment of the present invention, the authentication server first issues a convergence node device certificate to multiple narrow and wideband fusion convergence node devices connected to the authentication server. The convergence node device certificate is a certificate that identifies the legal identity of the narrow and wideband fusion convergence node device.

[0084] According to an embodiment of the present invention, an adaptive protocol library is also set in the narrow and wideband fusion 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 narrow and wideband fusion convergence node devices are set up in the substation, the narrow and wideband fusion convergence node devices start to work and will send out AP signals. Broadband devices and narrowband devices can select the narrow and wideband fusion convergence node device with the strongest signal that can be searched to connect.

[0085] According to an embodiment of the present invention, since different devices in broadband devices and narrowband 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.

[0086] The narrow-wideband convergence aggregation node device includes a narrowband wireless communication module, which is adapted to, when the device to be accessed determines that the communication mode is narrowband communication, in response to a communication connection request sent by a narrowband device, obtain the wireless networking protocol for 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 for the power transmission and transformation equipment Internet of Things node device.

[0087] A broadband wireless communication module, which is adapted to, when the device to be accessed determines that the communication mode 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.

[0088] The narrow-wideband convergence aggregation node device includes a processing module, which is adapted to parse the narrowband data sent by the narrowband device according to the wireless networking protocol for 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.

[0089] In a substation, there are many energized devices, and each energized device will generate an electromagnetic field, resulting in a relatively complex electromagnetic environment in the substation. When an access device transmits data, it may be affected by such factors and exhibit phenomena such as data packet loss and data errors.

[0090] Therefore, the device to be accessed can select multiple narrow-wideband convergence aggregation node devices for access and transmit the uplink communication data to be sent to the multiple narrow-wideband convergence aggregation node devices.

[0091] According to an embodiment of the present invention, the device to be accessed can select multiple narrow-wideband convergence aggregation node devices closest to the access device for communication connection and send the uplink communication data.

[0092] According to an embodiment of the present invention, the device to be accessed can also connect to multiple narrow-wideband convergence aggregation node devices according to the signal strength. The device to be accessed determines a preset number of narrow-wideband convergence aggregation node devices according to the signals sent by the multiple narrow-wideband convergence aggregation node devices that can be received, and uses them as the narrow-wideband convergence aggregation node devices to be connected to obtain a set of narrow-wideband convergence aggregation node devices to be connected. The present invention does not limit the determination method of the preset number. For example, the preset number is set to 5.

[0093] Figure 6 FIG. shows a schematic diagram of a communication method 600 based on a narrow-wideband convergence aggregation node device according to another exemplary embodiment of the present invention. AsFigure 6 As shown, first, step 610 is executed. The wide - and - narrow - band access controller responds to the communication verification request sent by the wide - and - narrow - band convergence node device, parses the communication verification request, and obtains the multi - node access device certificate and the convergence node device certificate of the device to be accessed.

[0094] According to an embodiment of the present invention, the device to be accessed includes wide - band devices and narrow - band devices deployed in a substation. The device to be accessed first sends a first device registration request to any one of the wide - and - narrow - band convergence node devices in the wide - and - narrow - band convergence node device set.

[0095] If the device to be accessed is a wide - band device, the wide - band device sends the first device registration request to the wide - band wireless communication module through wide - band communication; if the device to be accessed is a narrow - band device, the narrow - band device sends the first device registration request to the narrow - band wireless communication module through the narrow - band communication module.

[0096] The first device registration request includes the device information of the device to be accessed. The device information of the device to be accessed includes: a unique identification code for identifying the device to be accessed: device ID, communication method, the convergence node device ID of each wide - and - narrow - band convergence node device in the wide - and - narrow - band convergence node device set, and data usage. The convergence node device ID is the unique ID of the wide - and - narrow - band convergence node device to which the device to be accessed will be connected.

[0097] According to an embodiment of the present invention, after receiving the first device registration request, the wide - band convergence node device packages the first device registration request and the convergence node device certificate to generate a second device registration request, and sends it to the wide - and - narrow - band access controller. The wide - and - narrow - band access controller parses the second device registration request to obtain the first device registration request and the convergence node device certificate.

[0098] The wide - and - narrow - band access controller responds to the second device registration request sent by the wide - and - narrow - band convergence node device, parses the second device registration request, and obtains the first device registration request and the convergence node device certificate of the wide - and - narrow - band convergence node device that received the first device registration request.

[0099] Subsequently, the wide - and - narrow - band access controller sends the convergence node device certificate to the authentication server. The authentication server authenticates the convergence node device certificate. After successful authentication, the authentication server sends a first authentication success message to the wide - and - narrow - band access controller.

[0100] The broadband and narrowband access controller responds to the first authentication success message sent by the authentication server after authenticating the aggregation node device certificate, registers the device to be accessed according to the device information, and writes each piece of information in the device information of the device to be accessed into the registration information table. And apply to the authentication server for a multi-node access device certificate for the device to be accessed. The device information includes the aggregation node device ID of each broadband and narrowband fusion aggregation node device in the broadband and narrowband fusion aggregation node device set to be connected.

[0101] After the broadband and narrowband access controller successfully registers the device to be accessed, it applies to the authentication server for a multi-node access device certificate for the device to be accessed. The authentication server makes a multi-node access device certificate according to the device information of the device to be accessed and sends it to the broadband and narrowband access controller.

[0102] Subsequently, the broadband and narrowband access controller responds to the received multi-node access device certificate made according to the device information, and sends the multi-node access device certificate to the device to be accessed through the broadband and narrowband fusion aggregation node device.

[0103] The broadband and narrowband access controller responds to the received made multi-node access device certificate, and first sends a registration success message and a device certificate to the broadband and narrowband fusion aggregation node device. Subsequently, the broadband and narrowband fusion aggregation node device sends the multi-node access device certificate to the device to be accessed.

[0104] After the device to be accessed receives the multi-node device certificate, each time it establishes a communication connection with a broadband and narrowband fusion aggregation node device in the broadband and narrowband fusion aggregation node device set, it sends a communication connection request to the broadband and narrowband fusion aggregation node device, and the communication connection request includes the multi-node access device certificate.

[0105] After the broadband and narrowband fusion aggregation node device receives the communication connection request, it generates a communication verification request according to the communication connection request and the aggregation node device certificate and sends it to the broadband and narrowband access controller.

[0106] The broadband and narrowband access controller responds to the received communication verification request sent by the broadband and narrowband fusion aggregation node device, parses the communication verification request, and obtains the multi-node access device certificate and the aggregation node device certificate of the device to be accessed.

[0107] Subsequently, step 620 is executed. The broadband and narrowband access controller sends the multi-node access device certificate and the aggregation node device certificate to the authentication server so that the authentication server can perform certificate authentication.

[0108] The authentication server performs certificate authentication. If the authentication passes, it sends a second authentication success message to the broadband and narrowband access controller.

[0109] Subsequently, step 630 is executed. In response to the second authentication success message sent by the authentication server after successful certificate authentication, the broadband and narrowband access controller sends an allow connection message to the broadband and narrowband convergence node device, so that the device to be accessed can access the broadband and narrowband convergence node device and become an access device.

[0110] The device to be accessed can become an access device of multiple broadband and narrowband convergence node devices through the above method.

[0111] Based on the authentication success message, the broadband and narrowband access controller allows the device to be accessed to access the broadband and narrowband convergence node device, and sends an allow connection message to the broadband and narrowband convergence node device that receives the communication connection request. After receiving the allow connection message, the broadband and narrowband convergence node device negotiates a secret key with the device to be accessed to determine the session secret key. After the device to be accessed completes the secret key negotiation, it becomes an access device connected to the broadband and narrowband convergence node device.

[0112] The session secret key includes the private key and public key of the access device, and the private key and public key of the broadband and narrowband convergence node device.

[0113] When the access device communicates with the broadband and narrowband convergence node device, it encrypts the uplink communication data according to the public key of the broadband and narrowband convergence node device and sends it to the broadband and narrowband convergence node device. After receiving the encrypted uplink communication data, the broadband and narrowband convergence node device decrypts the uplink communication data according to the private key of the broadband and narrowband convergence node device to obtain the data content of the uplink communication data.

[0114] When the broadband and narrowband convergence node device needs to communicate with the access device, it encrypts the downlink communication data according to the public key of the access device and sends it to the access device. After receiving the downlink communication data sent by the broadband and narrowband convergence node device, the access device decrypts the downlink communication data according to the private key of the access device to obtain the data content of the downlink communication data.

[0115] According to an embodiment of the present invention, the access device includes a broadband device and a narrowband device. When the broadband device communicates with the broadband and narrowband convergence node device, it establishes a communication connection with the broadband wireless communication module for communication. When the narrowband device communicates with the broadband and narrowband convergence node device, it establishes a communication connection with the narrowband wireless communication module for communication.

[0116] According to an embodiment of the present invention, the uplink communication data includes narrowband data and broadband data. The downlink communication data includes data sent to the narrowband device and data of the broadband device.

[0117] According to an embodiment of the present invention, after broadband devices and narrowband devices are connected to the converged wide and narrowband aggregation node device, the wide and narrowband access controller manages the access devices according to the device type. The access devices include broadband devices and narrowband devices. Among them, the broadband devices include remote inspection devices and operation and maintenance management devices; the narrowband devices include online monitoring devices, such as various sensors.

[0118] According to an embodiment of the present invention, the wide and narrowband access controller can manage the access devices according to the registration information table. The registration information table also includes the device type of the access devices, specifically whether they belong to broadband devices or narrowband devices, and which type of device they are among the broadband devices or narrowband devices.

[0119] According to an embodiment of the present invention, the wide and narrowband access controller can also create device lists of different categories, such as the device list of broadband devices and the device list of narrowband devices, and can be further subdivided, such as the device list of remote inspection devices, the device list of operation and maintenance management devices, and the device list of online monitoring devices.

[0120] According to an embodiment of the present invention, the wide and narrowband access controller can also provide a management interface for the backend. The backend management personnel can obtain the management situation of the wide and narrowband access controller for various devices, including various device lists, through the management interface.

[0121] The management interface also provides management controls in the device list. Users can disconnect the access devices in the device list according to the management controls, set the disconnection time, etc., and set to add to the blacklist to prohibit the device from accessing the converged wide and narrowband aggregation node device in the future, etc. The present invention does not limit the specific implementation manner of the management controls and the management manner of the access devices.

[0122] According to an embodiment of the present invention, the access device determines a target converged wide and narrowband aggregation node device from the converged wide and narrowband aggregation node device set, and the uplink communication data sent by the access device to the target converged wide and narrowband aggregation node device is the target uplink communication data. The specific manner for the access device to determine a target converged wide and narrowband aggregation node device from the converged wide and narrowband aggregation node device set can be implemented as selecting the converged wide and narrowband aggregation node device with the shortest distance as the target converged wide and narrowband aggregation node device, or selecting the converged wide and narrowband aggregation node device with the strongest signal as the target converged wide and narrowband aggregation node device. The present invention does not limit the specific manner for selecting the target converged wide and narrowband aggregation node device.

[0123] According to an embodiment of the present invention, in the concentration of wide and narrowband integrated convergence node devices, other wide and narrowband integrated convergence node devices except the target wide and narrowband integrated convergence node device are verification wide and narrowband integrated convergence node devices. The uplink communication data sent by the access device to the verification wide and narrowband integrated convergence node device is verification uplink communication data. The verification wide and narrowband integrated convergence node device may include multiple wide and narrowband integrated convergence node devices, and the verification uplink communication data may include multiple uplink communication data.

[0124] According to an embodiment of the present invention, after receiving the target uplink communication data, the target wide and narrowband integrated convergence node device obtains the target data content of the target uplink communication data. Subsequently, the target wide and narrowband integrated convergence node device sends the target data content to the wide and narrowband access controller.

[0125] After receiving the verification uplink communication data, the verification wide and narrowband integrated convergence node device obtains the verification data content of the verification uplink communication data. Subsequently, the verification wide and narrowband integrated convergence node device sends the verification data content to the wide and narrowband access controller.

[0126] Subsequently, step 640 is executed. In response to receiving the target data content sent by the target wide and narrowband integrated convergence node device and the verification data content sent by the verification wide and narrowband integrated convergence node device, the wide and narrowband access controller verifies the target data content according to the verification data content, and determines whether the target data content is consistent with the verification data content; step 650 is executed. If they are consistent, the target data content is uploaded to the backend server.

[0127] When determining whether the target data content is consistent with the verification data content, determine the first number of target data information included in the target data content, and determine the second number of verification data information included in the verification data content. Determine whether the first number is the same as the second number. If they are different, it is determined that packet loss occurs in the target data content, and the verification data content is uploaded to the backend server.

[0128] If the first number is the same as the second number, then determine whether the order of each piece of target data information in the target data content is the same as the order of the corresponding piece of verification data information in the verification data content. If they are different, it is determined that a data order error occurs in the target data content, and the verification data content is uploaded to the backend server.

[0129] If the order of each piece of target data information in the target data content is the same as the order of the corresponding verification data information in the verification data content, then determine whether each piece of target data information is the same as the corresponding verification data information. If they are the same, it is determined that the target data content is consistent with the verification data content, and the target data content is uploaded to the backend server.

[0130] If a piece of target data information is different from the corresponding verification data information, it is determined that there is an error in the data content of the target data, and the verification data content is uploaded to the backend server.

[0131] According to an embodiment of the present invention, the broadband and narrowband access controller may also, after receiving the target data content, first upload the target data content to the backend server so that the backend server can perform data processing. After receiving the subsequently sent verification data content, the target data content is verified according to the verification data content to determine whether the target data content is consistent with the verification data content. If they are consistent, no processing is performed.

[0132] If they are inconsistent, a data correction message including the verification data content is sent to the backend server. [[ID=VIII]]

[0133] When the backend server receives the target data content or the verification data content, it processes the target data content or the verification data content.

[0134] Embodiment 3

[0135] The broadband and narrowband convergence node device, broadband and narrowband access controller, authentication server, and backend server of the present invention can be specifically implemented as a computing device. Figure 7 The schematic diagram of a computing device 700 according to an exemplary embodiment of the present invention is shown.

[0136] As Figure 7 shown, the computing device 700 may include: a central processing unit 710, a memory 720, an input / output interface 730, a communication interface 740, and a bus 750. Among them, the central processing unit 710, the memory 720, the input / output interface 730, and the communication interface 740 are communicatively connected to each other inside the computing device through the bus 750.

[0137] The central processing unit 710 may be implemented in a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (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.

[0138] The memory 720 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage devices, dynamic storage devices, etc. The memory 720 can store the 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 720 and are called and executed by the central processing unit 710.

[0139] The input / output interface 730 is used to connect to the input / output module to implement information input and output. The communication interface 740 is used to implement communication and interaction between this computing device and other devices. The bus 750 includes a path for transmitting information between various components of the computing device (such as the central processing unit 710, the memory 720, the input / output interface 730, and the communication interface 740).

[0140] It should be noted that although the above computing device only shows the central processing unit 710, the memory 720, the input / output interface 730, the communication interface 740, and the bus 750, in the specific implementation process, this computing device may also 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 solutions of the embodiments of this specification, and does not necessarily include all the components shown in the figure.

[0141] 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 does not intend to imply that the objects so described must have a given order in terms of time, space, sorting, or in any other way.

[0142] 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 efforts. 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 communication method based on a wide-narrow fusion convergence node device, characterized in that, It is used to implement communication connections between a broadband and narrowband access controller, a backend server, an authentication server, and multiple broadband and narrowband convergence node devices. Through the broadband and narrowband access controller, certificate verification and data content verification of access devices are carried out to ensure the secure access of devices and reliably upload data to the backend server; The method includes the following steps: In response to a communication verification request sent by a broadband and narrowband convergence node device, the broadband and narrowband access controller parses the communication verification request to obtain a multi-node access device certificate and a convergence node device certificate of the device to be accessed. The device to be accessed includes broadband devices and narrowband devices deployed in a substation; The broadband and narrowband access controller sends the multi-node access device certificate and the convergence node device certificate to the authentication server for the authentication server to perform certificate authentication; In response to a second authentication success message sent by the authentication server after successful certificate authentication, the broadband and narrowband access controller sends an allow connection message to the broadband and narrowband convergence node device, so that the device to be accessed can access the broadband and narrowband convergence node device and become an access device; In response to the target data content sent by the target broadband and narrowband convergence node device and the verification data content sent by the verification broadband and narrowband convergence node device, the broadband and narrowband access controller verifies the target data content according to the verification data content to determine whether the target data content is consistent with the verification data content; if they are consistent, the target data content is uploaded to the backend server. The target data content, the target broadband and narrowband convergence node device, and the verification broadband and narrowband convergence node device are determined according to the set of broadband and narrowband convergence node devices connected by the access device.

2. The communication method of a convergence node device based on wide and narrow integration according to claim 1, characterized in that The method further includes the following steps: In response to a second device registration request sent by a broadband and narrowband convergence node device, the broadband and narrowband access controller parses the second device registration request to obtain a first device registration request and a convergence node device certificate of the broadband and narrowband convergence node device. The first device registration request is a request sent by the device to be accessed to the broadband and narrowband convergence node device and includes device information of the device to be accessed. The device information includes the convergence node device ID of each broadband and narrowband convergence node device in the set of broadband and narrowband convergence node devices to be connected; The broadband and narrowband access controller sends the convergence node device certificate to the authentication server; In response to a first authentication success message sent by the authentication server after performing certificate authentication on the convergence node device certificate, the broadband and narrowband access controller registers the device to be accessed according to the device information and applies to the authentication server for a multi-node access device certificate of the device to be accessed; In response to the multi-node access device certificate made by the authentication server according to the device information, the broadband and narrowband access controller sends the multi-node device certificate to the device to be accessed through the broadband and narrowband convergence node device.

3. The communication method of a wide-narrow fusion convergence node device according to claim 2, characterized in that, The wide-narrowband convergence node device responds to a communication connection request sent by a device to be accessed, generates a communication verification request according to the communication connection request and the convergence node device certificate, and sends the communication verification request to the wide-narrowband access controller. The communication connection request includes the multi-node access device certificate of the device to be accessed.

4. A communication method based on a narrow-wide fusion convergence node device according to claim 1, characterized in that, After receiving the connection permission message, the wide-narrowband convergence node device negotiates a secret key with the device to be accessed to determine a session secret key, which includes the private key and public key of the wide-narrowband convergence node device. The method further includes: The wide-narrowband convergence node device responds to the encrypted uplink communication data sent by the access device, decrypts the encrypted uplink communication data according to the private key of the wide-narrowband convergence node device to obtain the data content of the uplink communication data. The encrypted uplink communication data is encrypted by the access device according to the public key of the wide-narrowband convergence node device.

5. A communication method based on a wide and narrow fusion convergence node device according to claim 4, characterized in that, The uplink communication data sent by the access device to the target wide-narrowband convergence node device is target uplink communication data, and the target wide-narrowband convergence node device determines the target data content according to the target uplink communication data. The uplink communication data sent by the access device to the verification wide-narrowband convergence node device is verification uplink communication data, and the verification wide-narrowband convergence node device determines the verification data content according to the verification uplink communication data.

6. A communication method based on a wide-narrow fusion convergence node device according to claim 1, characterized in that, The device to be accessed determines a preset number of wide-narrowband convergence node devices based on the signal strength of the signals sent by multiple wide-narrowband convergence node devices that can be received as the wide-narrowband convergence node devices to be connected, and obtains a set of wide-narrowband convergence node devices to be connected.

7. A communication method based on a wide and narrow fusion convergence node device according to claim 6, characterized in that The device to be accessed selects the wide-narrowband convergence node device with the strongest signal in the set of wide-narrowband convergence node devices as the target wide-narrowband convergence node device, and the other wide-narrowband convergence node devices in the set of wide-narrowband convergence node devices as the verification wide-narrowband convergence node devices.

8. A communication method based on a wide-narrow fusion convergence node device according to claim 1, characterized in that Verifying the target data content according to the verification data content and determining whether the target data content is consistent with the verification data content includes: Determining the first number of target data information included in the target data content and the second number of verification data information included in the verification data content; Judging whether the first number is the same as the second number. If they are different, it is judged that there is a packet loss in the target data content. If they are the same, then Judging whether the order of each piece of target data information in the target data content is the same as the order of the corresponding piece of verification data information in the verification data content. If they are different, it is judged that there is a data order error in the target data content. If they are the same, then Judging whether each piece of target data information is the same as the corresponding verification data information. If they are the same, it is judged that the target data content is consistent with the verification data content. If there is one piece of target data information that is different from the corresponding verification data information, it is judged that there is a data content error in the target data content.

9. A communication method based on a wide and narrow fusion convergence node device according to claim 1, characterized in that, After receiving the target data content, the wide-narrowband access controller uploads the target data content to the backend server for the backend server to perform data processing. After receiving the subsequently sent verification data content, the broadband and narrowband access controller verifies the target data content according to the verification data content, and determines whether the target data content is consistent with the verification data content; If they are inconsistent, a data correction message including the verification data content is sent to the backend server.

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