CN110753327B - Terminal object connection system based on wireless ad hoc network and LoRa - Google Patents
Terminal object connection system based on wireless ad hoc network and LoRa Download PDFInfo
- Publication number
- CN110753327B CN110753327B CN201910938092.0A CN201910938092A CN110753327B CN 110753327 B CN110753327 B CN 110753327B CN 201910938092 A CN201910938092 A CN 201910938092A CN 110753327 B CN110753327 B CN 110753327B
- Authority
- CN
- China
- Prior art keywords
- data
- node
- monitoring terminal
- lora
- wireless
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a terminal object connection system based on wireless ad hoc network and LoRa, wherein data convergence equipment is additionally arranged at the nearby position of each group of three-phase monitoring terminal installation points, the monitoring terminals and the data convergence equipment form a wireless micro-network convergence unit, and short-distance communication is completed through wireless communication; the data convergence devices are communicated by adopting a wireless LoRa ultra-long distance communication network, one data convergence device is selected as an object connection access node, and data of all the data convergence devices in the wireless LoRa network are converged and transmitted to an object connection proxy or an information center. According to the invention, a plurality of monitoring terminals are incorporated into a wireless micro-network convergence unit, and the configuration quantity of the LoRa modules in the system is greatly reduced by additionally arranging the data convergence device for configuring the LoRa modules, so that the network construction and operation and maintenance costs are saved, and the system power consumption is reduced; the networking mode of the invention is flexible and changeable, and the flexible and rapid deployment of the network system according to the multi-application scene of the power grid can be realized.
Description
Technical Field
The invention relates to a terminal object connection system based on a wireless ad hoc network and LoRa, and belongs to the technical field of intelligent power grids and electric power Internet of things.
Background
According to incomplete statistics, the number of terminals of the Internet of things serving power grid production service in the current power system is as high as billions, wherein only about five billions of terminals are connected to the network, and most of terminals are still in an off-network running state, so that a large amount of resources are wasted. In order to bring more types and numbers of terminals into the ubiquitous Internet of things, an Internet of things agent is introduced at the terminal level, the network difference of the bottom layer is shielded, safe, reliable and comprehensive access is realized, and the ecological circle of the energy Internet of everything interconnection is created accordingly.
The distributed monitoring terminals for the power transmission lines are huge in quantity, can master the state of the power transmission lines in real time, discover potential safety hazards of the power transmission lines in time, guide operation and maintenance personnel to accurately locate and rapidly remove faults, are important components of a sensing layer of the ubiquitous Internet of things, and have important significance for guaranteeing safe operation of the power grid. At present, the domestic power line distributed monitoring terminal mostly adopts wireless public networks such as GPRS, CDMA, 4G and the like for communication. With popularization and application of the electric power internet of things, electric power terminals based on the cellular narrowband internet of things (Narrow Band Internet of Things, NB-IoT) technology are presented. These communication methods depend on the network built by the operator, on one hand, the cost of renting the wireless public network is high, on the other hand, the network quality depends on the operator, and potential data information security problems exist.
Meanwhile, the application of the LoRa technology in the power transmission line monitoring system has the characteristics of low power consumption and long distance, and is more important to the autonomous construction and operation of the LoRa network by enterprises, thereby being beneficial to autonomously controlling the network quality, rapidly optimizing the network aiming at the self business development and mastering all operation data in the self.
The existing on-line monitoring technology of the power transmission line equipment based on LoRa has the following defects:
(1) Each monitoring terminal is connected with the LoRa gateway through the LoRa module, so that the cost is high;
(2) The network architecture is single, and flexible deployment of the network system is difficult to realize;
(3) Lack of data information security concerns;
(4) There is no consideration in the method of coupling the objects.
Disclosure of Invention
The invention designs a terminal object connection system based on wireless ad hoc network and LoRa, which greatly reduces the configuration quantity of the LoRa modules in the system by adding a data convergence device for configuring the LoRa modules at a monitoring terminal, thereby realizing high-efficiency and flexible object connection of the electric power monitoring terminal with huge quantity.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a terminal object connection system based on wireless ad hoc network and LoRa adds a data convergence device at the nearby position of a three-phase monitoring terminal, and the three-phase monitoring terminal and the data convergence device form a wireless micro-network convergence unit;
a 470MHz module is configured in the data convergence device and is used for collecting three-phase monitoring terminal data;
a LoRa module is configured in the data aggregation equipment and is used for accessing a wireless LoRa network;
a safety module is configured in the data convergence device and is used for mutual authentication between the three-phase monitoring terminal and the data convergence device;
the access system further comprises:
the object connection access node is used for converging the acquired data of all the data converging devices and sending the acquired data to an object connection proxy or an information center; the object coupling-in node is one or more data aggregation devices.
Further, the 470MHz module adopts a star networking mode.
Further, the data aggregation device performs data transmission in a point-to-point or multi-hop mode in the wireless LoRa network.
Further, the object coupling node is connected to an object coupling agent or an information center in a LoRa or 4G mode through an Ethernet.
Further, the data aggregation device is specifically configured to:
and establishing a communication link with the three-phase monitoring terminal node by adopting a mechanism for requesting to join the three-phase monitoring terminal node, thereby forming an ad hoc network.
Further, when node addresses of the established communication links collide, the node addresses of the data aggregation equipment are unchanged, and the three-phase monitoring terminal nodes modify the addresses.
Further, the method comprises the steps of,
when the nodes of the data aggregation equipment are required to be closed or abnormal is detected, a network automatic disconnection command is actively reported to the three-phase monitoring terminal nodes, and after the three-phase monitoring terminal nodes reply to be allowed to be disconnected, the nodes of the data aggregation equipment are disconnected from the ad hoc network;
when the node of the data convergence device or the three-phase monitoring terminal node does not receive the heartbeat packet within a specified time, the node is in disconnection: clearing a transmitting window corresponding to the disconnection node; clearing the link information state of the lost node, and clearing the related statistical data;
if the loss node is a node of the data aggregation equipment, re-requesting to join the three-phase monitoring terminal node; and if the disconnection node is a three-phase monitoring terminal node, waiting for the node joining of the data aggregation equipment.
Further, the monitoring terminal is specifically configured to transmit data of the three-phase monitoring terminal to the data aggregation device by adopting a sliding data window based on a half duplex mode;
the monitoring terminal is also used for dynamically adjusting the sliding data window according to the data transmission rate and the message length, distributing different time slices, monitoring the same frequency concurrency and adopting an active switching master-slave mode to transmit data.
Furthermore, the three-phase monitoring terminal and the data aggregation equipment perform mutual authentication in a mode of digital signature and digital certificate.
Furthermore, the three-phase monitoring terminal and the data convergence device are particularly used for,
the initiating authentication party uses SM3 hash algorithm to perform unidirectional hash calculation on SM4 temporary symmetric keys negotiated by the ECDH algorithm to be transmitted, and generates a 256-bit abstract;
the initiating authentication party uses the private key to encrypt the abstract by an SM2 algorithm to generate a digital signature;
the initiating authentication party packages and sends the SM4 temporary symmetric key, the digital signature and the CA certificate of the initiating authentication party together according to a preset format to a receiving party;
after receiving the message sent by the initiating authentication party, the receiving party decrypts the CA certificate of the initiating authentication party by using the CA public key to obtain the public key of the initiating authentication party;
the receiver decrypts the digital signature by using the public key of the initiating authentication party to obtain a digest D;
the receiver performs hash calculation on the SM4 temporary symmetric key negotiated by the ECDH algorithm by using the SM3 hash algorithm to obtain a digest D';
the receiver compares D with D': if the two devices are the same, proving that the other device is legal equipment authenticated by CA; if the different or sent messages do not contain the digital signature and the CA certificate, the other party is not legal after CA authentication;
if the authentication is legal equipment, the initiating authentication party calls an SM4 algorithm to encrypt the transmission data, and the encrypted transmission data is sent to a receiving party;
after receiving the encrypted data, the receiver calls an SM4 decryption algorithm to decrypt the data, encrypts the data of the receiver by using the SM4 encryption algorithm and sends the encrypted data to the initiating authentication party;
the initiating authentication party calls an SM4 decryption algorithm to decrypt the data;
the initiating authentication party is a monitoring terminal or a data aggregation device, and if the initiating authentication party is a three-phase monitoring terminal, the receiving party is the data aggregation device; if the initiating authentication party is the data aggregation equipment, the receiving party is a three-phase monitoring terminal.
The beneficial effects achieved by the invention are as follows:
according to the invention, a plurality of monitoring terminals are incorporated into a wireless micro-network convergence unit, and the configuration quantity of the LoRa modules in the system is greatly reduced by additionally arranging the data convergence device for configuring the LoRa modules, so that the network construction and operation and maintenance costs are saved, and the system power consumption is reduced; the networking mode is flexible and changeable, the flexible and rapid deployment of the network system according to the multi-application scene of the power grid can be realized, the nodes of the LoRa network can be reasonably utilized, more monitoring terminals can be accommodated, and important data can be prevented from being omitted.
According to the invention, a sliding data window technology is adopted on the distributed monitoring terminal of the power transmission line, so that the problem of limited data transmission bandwidth in a half duplex mode is solved, the problems of message loss and high bit error rate are solved by correcting a sliding data window transmission mechanism, the bidirectional data transmission is realized, the inspection efficiency is improved, and the user experience is improved.
According to the invention, the networking nodes of the power transmission line distributed monitoring terminal network in the wireless micro-network convergence unit adopt a plug-and-play mode, so that the networking failure problem caused by repeated networking node configuration is solved, and meanwhile, the field debugging workload is reduced, so that the distributed monitoring terminal can be rapidly arranged on the power cable.
According to the invention, the distributed monitoring terminal is reinforced safely, the monitoring terminal and the data convergence device are mutually authenticated in a mode of digital signature and digital certificate, so that the conditions of external node invasion and node forging can be prevented, and meanwhile, a solid foundation is laid for the application of the electric power Internet of things by using a fusion reinforcing technology of a plurality of national encryption algorithms.
Drawings
Fig. 1 is a schematic diagram of a connection structure between a three-phase distributed fault diagnosis terminal and data aggregation equipment of a power transmission line in an embodiment of the present invention;
FIG. 2 is a block diagram of an access system formed by adding data aggregation equipment near a tower in an embodiment of the invention;
FIG. 3 is a flow chart of node joining of a data aggregation device in an embodiment of the present invention;
fig. 4 is a flowchart of automatic node detachment of the data aggregation device in the embodiment of the present invention;
fig. 5 is a flow chart of batch data transmission of a sliding data window based on a half duplex mode in an embodiment of the invention;
fig. 6 is a flowchart of monitoring wireless ad hoc network trusted authentication and security reinforcement of a terminal according to an embodiment of the present invention.
Detailed Description
The invention is further described below. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
The embodiment of the invention provides a power transmission line distributed terminal object connection system based on a wireless ad hoc network and LoRa, which has the following network topology structure:
data convergence equipment is additionally arranged at the nearby position of each group A, B, C of three-phase monitoring terminal installation points, and normally 3 monitoring terminals are provided with one data convergence equipment; when 2 towers are closer, one data aggregation device can be shared.
The three-phase monitoring terminal and the data convergence device form a wireless micro-network convergence unit, and short-distance communication is completed through wireless communication. The data convergence devices are communicated by adopting a wireless LoRa ultra-long distance communication network. And selecting one data convergence device as an object connection node, converging the data of all the data convergence devices in the wireless LoRa network, and transmitting the data to an object connection proxy or an information center.
Referring to fig. 1, in consideration of the short distance between three-phase distributed fault diagnosis monitoring terminals of a power transmission line, the long distance between adjacent towers and the low power consumption design requirement, data convergence equipment is additionally arranged below the towers where the installation points of the three-phase monitoring terminals are located. In order to ensure networking safety and communication safety, A, B, C three-phase monitoring terminals and data convergence equipment complete short-distance communication through 470MHz wireless. The 470MHz module adopts a star network networking mode, data collected by the three-phase monitoring terminal is sent to the data convergence device through the network, and the data is forwarded by the data convergence device.
Furthermore, the monitoring terminal in the embodiment of the invention is not limited to the power transmission line distributed monitoring terminal, but can be a monitoring terminal aiming at other objects or other forms such as a tower, forest fire, temperature and humidity, smoke feeling, microclimate and the like.
Furthermore, the access mode of all the monitoring terminals in the embodiment of the invention is not limited to the access mode through the wireless micro-network convergence unit, and various monitoring terminals which are independently provided with the LoRa module originally can also be directly accessed to the wireless LoRa network.
Furthermore, in the embodiment of the invention, the data transmission can be performed in a point-to-point and multi-hop mode in the wireless LoRa network.
Further, in the embodiment of the present invention, the wireless LoRa network is not limited to only one data aggregation device serving as an internet of things access node, and may have multiple data aggregation devices.
Furthermore, in the embodiment of the present invention, the data convergence device serving as the object connection node may be connected to the object connection proxy or the information center through ethernet, or may also be connected to the data convergence device through other manners such as LoRa or 4G.
A system structure diagram of adding data aggregation equipment below a tower where a three-phase distributed monitoring terminal is located is shown in fig. 2. From the safety aspect of the physical connection, the three-phase distributed monitoring terminal, the original temperature and humidity sensor and the wind bias monitoring terminal with the LoRa module are all connected with the data convergence device through a wireless 470M star network to form a wireless micro-network convergence unit, and the wireless micro-network convergence unit is subjected to the credibility authentication and the safety reinforcement of the wireless ad hoc network. The data aggregation devices 1 to N are respectively and independently configured with a LoRa module, form a LoRa ultra-long distance communication network, and communicate in a multi-hop manner. In order to improve the efficiency of data exchange, a data aggregation device M and a data aggregation device (M+1) are selected as object connection access nodes, wherein the data aggregation device M aggregates data of wireless micro-network aggregation units 1 to M, the data aggregation device (M+1) aggregates data of wireless micro-network aggregation units (M+1) to N, and the data aggregation device M and the data aggregation device (M+1) are connected to an object connection proxy through an Ethernet.
In the invention, the networking node of the power transmission line distributed monitoring terminal network in the wireless micro-network convergence unit adopts a plug-and-play mode.
The network of A, B, C three-phase nodes of the power transmission line distributed monitoring terminal and nodes of the data aggregation equipment adopts an automatic network mode, A, B, C, the nodes of the data aggregation equipment are free from configuration, and equipment addresses are randomly generated; the node of the data aggregation device is started to automatically request to join the A, B, C node, and the devices with the same secret key can be networked. The method has the characteristics of no configuration of the monitoring terminal, convenient on-site operation and maintenance, tamper resistance of the nodes and the like.
The data aggregation equipment node joins: the node request of the data convergence device is adopted to join the node mechanism of the monitoring terminal A, B, C, the handshake mechanism is adopted to establish the node communication link, and the node joining A, B, C three-phase node flow of the data convergence device is shown in fig. 3.
a. The addition of the A/B/C three-phase nodes is independent and does not affect each other, and the A/B/C three-phase nodes establish links first and transmit data first.
b. When node address conflict occurs, node address of the data convergence device is unchanged, and A/B/C three-phase node modifies address.
Node exit is divided into two cases, one is that the node of the data convergence device is automatically separated, and the other is that the node is out of connection. The two cases are handled as follows:
a. automatic node detachment for data aggregation device
When the node of the data aggregation equipment needs to be closed or an abnormality is detected, an automatic network disconnection command is actively reported to the A/B/C node, and after the A/B/C node replies that disconnection is allowed, the node disconnection of the data aggregation equipment is realized. The flow is shown in fig. 4.
b. Node disconnection of terminal/data aggregation equipment
The nodes of the data aggregation equipment and the terminal nodes can periodically synchronize the heartbeat packet, and when one node does not receive the heartbeat packet of the corresponding node within a specified time, the node disconnection process is entered, wherein the process is as follows:
b1 Clearing the sending window corresponding to the unconnected address node.
b2 Clearing link information status of the unconnected address node and clearing associated statistics.
b3 If the node is the A/B/C node, the node of the data convergence device enters the node access-node joining-node link establishment flow.
b4 If the node is the data convergence device, the A/B/C node waits for the node access of the data convergence device.
The automatic joining and exiting mechanism and the safety authentication mechanism of the distributed terminal networking node of the power transmission line have the safety authentication of preventing counterfeiting and interception, and are suitable for flexibly increasing and decreasing the nodes on site.
According to the invention, a sliding data window batch data reliable transmission method based on a half duplex mode is adopted for data transmission between the monitoring terminal and the data convergence device.
A sliding data window technology is adopted on a transmission line distributed monitoring terminal half-duplex networking, and a sliding data window transmission mechanism is modified to be changed into a sliding data window in a half-duplex mode; according to the transmission rate and the message length, the sliding data window is dynamically adjusted, different time slices are allocated, the same frequency concurrency is monitored, and the master-slave mode is actively switched, so that collision detection is reduced.
Basic principle of sliding data window transport protocol: at any time, the sender maintains a serial number of a continuous frame which is allowed to be sent, which is called a sending window; at the same time, the receiver also maintains a sequence number of successive frames that are allowed to be received, called the receive window. In order to simplify the transmission mechanism, the upper and lower bounds of the sequence numbers of the transmission window and the reception window are set to be the same, and the sizes are also set to be the same. The sequence numbers within the transmission window represent frames that have been transmitted, but have not yet been acknowledged, or frames that can be transmitted.
The sliding data window transmission protocol provides that the sender may continue to send data frames until the sending window is full, and will not slide forward after waiting for an acknowledgement that the receiver has correctly received back. Since the receiving side needs to determine whether the received frame is a new frame or a retransmitted frame, the transmitting side adds a sequence number to each frame. A flow chart of the sender and receiver operation thereof is shown in fig. 5.
The sender sets the number of the sending frame number, acquires and parses the message from the host, and starts a timer after sending the data when the parsed message assembly frame (seq) is equal to the sending frame number, but if the data or the ACK is lost, the sending situation is considered to be the sending occurrence after the timer expires and the ACK is not received, and retransmission is needed.
The receiving side sets the expected frame number, waits for the data frame of the transmitting side, directly transmits the confirmation receiving frame number when the transmission request frame number transmitted by the transmitting side is the same as the expected frame number, and resumes transmission when the transmission request frame number is the same as the expected frame number.
The sliding data window transmission mechanism can solve the problems of limited bandwidth, data loss and the like caused by co-frequency concurrency, conflict detection and half duplex.
The invention also provides a trusted authentication and trusted transmission method suitable for wireless ad hoc network data transmission of the distributed monitoring terminal of the power transmission line, and safety reinforcement is carried out on the half-duplex wireless ad hoc network safety based on the national cryptographic algorithms SM2, SM3 and SM 4.
The device authentication is to confirm whether the other party is a legal device or not, and should be authenticated when the two parties are networked to establish a connection. The monitoring terminal and the data aggregation equipment adopt a mode of digital signature and digital certificate to carry out mutual authentication. And performing a device authentication link between the networking establishment and the service data transmission.
Taking the example that the data aggregation device initiates authentication to the monitoring terminal, the steps are as shown in fig. 6:
a. the data aggregation device performs one-way hash calculation on the transmitted plaintext data (here, the plaintext data is the SM4 temporary symmetric key negotiated by the ECDH algorithm) by using an SM3 hash algorithm, and generates a 256-bit digest.
b. The data aggregation device uses the private key to encrypt the abstract by the SM2 algorithm, and generates a digital signature.
c. The data aggregation device packages and sends the plaintext data, the digital signature and the CA certificate of the data aggregation device to the monitoring terminal together according to a preset format.
d. After receiving the message sent by the data aggregation device, the monitoring terminal decrypts the CA certificate of the data aggregation device by using the CA public key to obtain the public key of the data aggregation device.
e. And the monitoring terminal decrypts the digital signature by using the public key of the data aggregation equipment to obtain the abstract D.
f. And the monitoring terminal performs hash calculation on the plaintext data by using an SM3 hash algorithm to obtain a digest D'.
g. The monitoring terminal compares D with D': if the device is the same, the other party is proved to be legal device authenticated by the CA. If the different or sent messages do not contain the digital signature and the CA certificate, the other party is not legal after CA authentication.
h. The data aggregation device calls an SM4 algorithm to encrypt the data, and sends the encrypted data to the monitoring terminal.
i. And the monitoring terminal receives the encrypted data, calls an SM4 decryption algorithm to decrypt the data, encrypts the monitoring terminal data by the SM4 encryption algorithm and sends the encrypted data to the data aggregation equipment.
j. The data aggregation device then invokes the SM4 decryption algorithm to decrypt the data.
Similarly, the step of the monitoring terminal initiating authentication to the data aggregation device is similar. One party of unidirectional authentication only needs to send a message once.
And in the authentication process, if any party finds that the other party is illegal, canceling the networking connection. And sending an illegal alarm of the opposite terminal to the alarm module. The connection may then be re-established automatically or the user may be waited for a further manual connection.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (8)
1. A terminal object connection system based on wireless ad hoc network and LoRa is characterized in that a data convergence device is additionally arranged at the nearby position of a three-phase monitoring terminal, and the three-phase monitoring terminal and the data convergence device form a wireless micro-network convergence unit;
a 470MHz module is configured in the data convergence device and is used for collecting three-phase monitoring terminal data;
a LoRa module is configured in the data aggregation equipment and is used for accessing a wireless LoRa network;
a safety module is configured in the data convergence device and is used for mutual authentication between the three-phase monitoring terminal and the data convergence device;
the data aggregation device is specifically configured to:
adopting a mechanism for requesting to join in a three-phase monitoring terminal node, and establishing a communication link with the three-phase monitoring terminal node to form an ad hoc network;
the three-phase monitoring terminal is specifically used for transmitting data of the three-phase monitoring terminal to the data convergence device by adopting a sliding data window based on a half-duplex mode;
the three-phase nodes of the three-phase monitoring terminal and the nodes of the data aggregation equipment adopt an automatic networking mode, the nodes of the data aggregation equipment are free from configuration, and addresses are randomly generated;
the node of the data aggregation equipment is started to automatically request to join in a three-phase node of the three-phase monitoring terminal, nodes with the same key can be networked, and the three-phase node firstly builds a link and then firstly transmits data; when node address conflict occurs, node addresses of the data aggregation equipment are unchanged, and three-phase nodes modify the addresses;
the access system further comprises:
the object connection access node is used for converging the acquired data of all the data converging devices and sending the acquired data to an object connection proxy or an information center; the object coupling-in node is one or more data aggregation devices.
2. The wireless ad hoc network and LoRa based end-effector coupling system of claim 1, wherein said 470MHz module employs a star networking mode.
3. The wireless ad hoc network and LoRa-based end-effector coupling system of claim 1, wherein the data aggregation device performs data transmission in a point-to-point or multi-hop manner within the wireless LoRa network.
4. The wireless ad hoc network and LoRa-based end object coupling system according to claim 1, wherein said object coupling node is connected to an internet of things proxy or information center via ethernet, loRa or 4G.
5. A wireless ad hoc network and LoRa based end-user coupling system according to claim 1,
when the nodes of the data aggregation equipment are required to be closed or abnormal is detected, a network automatic disconnection command is actively reported to the three-phase monitoring terminal nodes, and after the three-phase monitoring terminal nodes reply to be allowed to be disconnected, the nodes of the data aggregation equipment are disconnected from the ad hoc network;
when the node of the data convergence device or the three-phase monitoring terminal node does not receive the heartbeat packet within a specified time, the node is in disconnection: clearing a transmitting window corresponding to the disconnection node; clearing the link information state of the lost node, and clearing the related statistical data;
if the loss node is a node of the data aggregation equipment, re-requesting to join the three-phase monitoring terminal node; and if the disconnection node is a three-phase monitoring terminal node, waiting for the node joining of the data aggregation equipment.
6. A wireless ad hoc network and LoRa based end-user coupling system according to claim 1,
the three-phase monitoring terminal is also used for dynamically adjusting a sliding data window according to the data transmission rate and the message length, distributing different time slices, monitoring the same frequency concurrency and adopting an active switching master-slave mode to transmit data.
7. The wireless ad hoc network and LoRa-based terminal object coupling system according to claim 1, wherein the three-phase monitoring terminal and the data aggregation device perform mutual authentication by means of digital signature and digital certificate.
8. The wireless ad hoc network and LoRa based end coupling system according to claim 7, wherein said three-phase monitoring terminals and data aggregation devices are specifically configured to,
the initiating authentication party uses SM3 hash algorithm to perform unidirectional hash calculation on SM4 temporary symmetric keys negotiated by the ECDH algorithm to be transmitted, and generates a 256-bit abstract;
the initiating authentication party uses the private key to encrypt the abstract by an SM2 algorithm to generate a digital signature;
the initiating authentication party packages and sends the SM4 temporary symmetric key, the digital signature and the CA certificate of the initiating authentication party together according to a preset format to a receiving party;
after receiving the message sent by the initiating authentication party, the receiving party decrypts the CA certificate of the initiating authentication party by using the CA public key to obtain the public key of the initiating authentication party;
the receiver decrypts the digital signature by using the public key of the initiating authentication party to obtain a digest D;
the receiver performs hash calculation on the SM4 temporary symmetric key negotiated by the ECDH algorithm by using the SM3 hash algorithm to obtain a digest D';
the receiver compares D with D': if the two devices are the same, proving that the other device is legal equipment authenticated by CA; if the different or sent messages do not contain the digital signature and the CA certificate, the other party is not legal after CA authentication;
if the authentication is legal equipment, the initiating authentication party calls an SM4 algorithm to encrypt the transmission data, and the encrypted transmission data is sent to a receiving party;
after receiving the encrypted data, the receiver calls an SM4 decryption algorithm to decrypt the data, encrypts the data of the receiver by using the SM4 encryption algorithm and sends the encrypted data to the initiating authentication party;
the initiating authentication party calls an SM4 decryption algorithm to decrypt the data;
the initiating authentication party is a three-phase monitoring terminal or data aggregation equipment, and if the initiating authentication party is the three-phase monitoring terminal, the receiving party is the data aggregation equipment; if the initiating authentication party is the data aggregation equipment, the receiving party is a three-phase monitoring terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910938092.0A CN110753327B (en) | 2019-09-30 | 2019-09-30 | Terminal object connection system based on wireless ad hoc network and LoRa |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910938092.0A CN110753327B (en) | 2019-09-30 | 2019-09-30 | Terminal object connection system based on wireless ad hoc network and LoRa |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110753327A CN110753327A (en) | 2020-02-04 |
| CN110753327B true CN110753327B (en) | 2023-07-25 |
Family
ID=69277484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910938092.0A Active CN110753327B (en) | 2019-09-30 | 2019-09-30 | Terminal object connection system based on wireless ad hoc network and LoRa |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110753327B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342967B (en) * | 2020-03-06 | 2021-03-19 | 北京中宇万通科技股份有限公司 | Method and device for solving block chain user certificate loss or damage |
| CN112566122B (en) * | 2020-11-13 | 2022-05-24 | 中国人民解放军国防科技大学 | Method and system for monitoring information transfer state of non-implanted wireless ad hoc network |
| CN113034882B (en) * | 2020-12-23 | 2022-02-22 | 利尔达科技集团股份有限公司 | Centralized meter reading method based on time slice competition reporting |
| CN112820092B (en) * | 2020-12-25 | 2021-12-31 | 北京市腾河电子技术有限公司 | Method for collecting electricity consumption data, terminal equipment and storage medium |
| CN113179498A (en) * | 2021-04-29 | 2021-07-27 | 国网电力科学研究院武汉南瑞有限责任公司 | Power transmission and transformation on-line monitoring data ad hoc network communication method and system |
| CN113259893B (en) * | 2021-06-28 | 2021-11-09 | 北京智芯微电子科技有限公司 | Power distribution body area network node authentication system and method |
| CN114222255B (en) * | 2021-12-24 | 2023-02-17 | 珠海格力电器股份有限公司 | Method and device for device ad hoc network, electronic device and storage medium |
| CN117202371A (en) * | 2023-07-26 | 2023-12-08 | 广东百德朗科技有限公司 | LoRa multi-node big data transmission processing method and device and electronic equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106027518A (en) * | 2016-05-19 | 2016-10-12 | 中国人民解放军装备学院 | Trusted network connection method based on quasi real-time state feedback |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162607A (en) * | 2015-10-12 | 2015-12-16 | 武汉瑞纳捷电子技术有限公司 | Authentication method and system of payment bill voucher |
| CN107046531B (en) * | 2017-03-06 | 2020-07-10 | 国网湖南省电力公司 | Data processing method and system for accessing data of monitoring terminal to power information network |
| CN109495859A (en) * | 2018-10-18 | 2019-03-19 | 华东交通大学 | A kind of pole tower health monitoring wireless sensor network merging 5G technology of Internet of things |
-
2019
- 2019-09-30 CN CN201910938092.0A patent/CN110753327B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106027518A (en) * | 2016-05-19 | 2016-10-12 | 中国人民解放军装备学院 | Trusted network connection method based on quasi real-time state feedback |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110753327A (en) | 2020-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110753327B (en) | Terminal object connection system based on wireless ad hoc network and LoRa | |
| CN100586087C (en) | Wireless access apparatus and method, and wireless network | |
| US20180063079A1 (en) | Secure Tunnels for the Internet of Things | |
| CN101820619B (en) | Efficient and energy-saving link safety method in wireless sensor network | |
| WO2019036019A1 (en) | Systems and methods for implementing data communications with security tokens | |
| CN102035845B (en) | Switching equipment for supporting link layer secrecy transmission and data processing method thereof | |
| CN101442403B (en) | Self-adapting method for exchanging composite cipher key and managing session cipher key | |
| CN103166849B (en) | The method of the interconnected network routing convergence of IPSec VPN and routing device | |
| WO2012083828A1 (en) | Method, base station and system for implementing local routing | |
| KR20100120442A (en) | An apparatus and method for enhancing the security of zigbee wireless protocol | |
| US8094634B2 (en) | Sender and/or helper node modifications to enable security features in cooperative wireless communications | |
| CN103888940A (en) | Multi-level encryption and authentication type WIA-PA network handheld device communication method | |
| US20050008160A1 (en) | Central encryption management system | |
| WO2012168888A1 (en) | Secure data transmission to network nodes in a network | |
| US20100131762A1 (en) | Secured communication method for wireless mesh network | |
| CN102469063B (en) | Routing protocol security alliance management method, Apparatus and system | |
| JP2021040308A (en) | Methods and apparatus for end-to-end secure communications | |
| CN101123538B (en) | Remote encryption and supervision method for communication interfaces of wireless local network | |
| CN114025346B (en) | Data transmission method for data security and effectiveness between mobile self-setting networks | |
| CN103139189A (en) | Internet protocol security (IPSec) tunnel sharing method, IPSec tunnel sharing system and IPSec tunnel sharing equipment | |
| CN101540725B (en) | Method and device for limiting number of user equipment of access user premises equipment | |
| CN102857918A (en) | Vehicle-mounted communication system | |
| CN207869118U (en) | Data transmission system based on quantum cryptography exchange apparatus | |
| CN102668504A (en) | Methods and devices having a key distributor function for improving the speed and quality of a handover | |
| CN101399831A (en) | Communication path establishment method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |