CN110519866B - Communication system based on 230MHz microgrid and networking method thereof - Google Patents
Communication system based on 230MHz microgrid and networking method thereof Download PDFInfo
- Publication number
- CN110519866B CN110519866B CN201910670157.8A CN201910670157A CN110519866B CN 110519866 B CN110519866 B CN 110519866B CN 201910670157 A CN201910670157 A CN 201910670157A CN 110519866 B CN110519866 B CN 110519866B
- Authority
- CN
- China
- Prior art keywords
- node
- module
- communication
- network
- data
- 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
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/08—User group management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Computer Security & Cryptography (AREA)
- Multimedia (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a communication system based on a 230MHz microgrid and a networking method thereof, and relates to the field of communication of the microgrid. In the existing microgrid communication cabin applied to the power internet of things, a star network is generally adopted as a networking mode, and the problems of small coverage area and poor network robustness exist. The communication cabin comprises a shell, an antenna module, a main control unit arranged in the shell, a power supply module, a communication module, a service acquisition interface circuit and a safety chip module; a service terminal integrated communication cabin forms a node, the 230MHz microgrid of the power grid is based on Mesh networking, the nodes in the network are mutually connected, and an integral network is formed among the nodes; the central node in the wireless Mesh network discovers and maintains the routing connection, eliminates the influence of single-point faults on services, and improves the network robustness by providing redundant paths so as to enable the cascade communication between the nodes to have wider coverage.
Description
Technical Field
The invention relates to the field of communication of micro-networks, in particular to a communication system based on a 230MHz micro-network and a networking method thereof.
Background
In the existing microgrid communication cabin applied to the power internet of things, a star network is generally adopted as a networking mode, and the problems of small coverage area and poor network robustness exist.
Disclosure of Invention
The technical problem to be solved and the technical task to be solved by the invention are to perfect and improve the prior technical scheme and provide a communication system based on a 230MHz microgrid and a networking method thereof so as to achieve the purpose of improving the network robustness and the coverage area. Therefore, the invention adopts the following technical scheme.
The communication system based on the 230MHz microgrid comprises a communication bin, wherein the communication bin comprises a shell, an antenna module, a main control unit arranged in the shell, a power module, a communication module, a service acquisition interface circuit and a safety chip module; wherein:
the main control unit: the device is used for routing addressing, data receiving and transmitting, forwarding, network management strategy control and ASE air interface encryption and comprises a memory for storage, a calculation processing module, an interface module, a networking module, a forwarding module and a routing pool module;
a communication module: the micro-grid communication module is connected with the main control unit, and is connected with a wireless repeater or other communication bins to realize data receiving and sending; meanwhile, the communication module also has the function of network interconnection, can be used as a routing node for multi-hop communication of other communication bins, and obtains the same wireless coverage range with lower transmitting power;
an antenna module: the communication module is connected with the communication module and is used for realizing communication with a 230MHz power wireless private network based on a coupling mode;
the service acquisition interface circuit: the system is connected with the main control unit and provides a general hardware instruction interface through which various service terminals realize data communication; the service terminal comprises an intelligent ammeter, a charging pile and a water meter;
a security chip module: the system is connected with the main control unit and used for encrypting the information sent by the main control unit by a service layer;
a power supply module: the main control unit, the carrier module, the communication module and the safety chip are connected with each other and supply low-voltage direct-current power to the main control unit, the carrier module, the communication module and the safety chip;
a service terminal integrated communication cabin forms a node, the 230MHz microgrid of the power grid is based on Mesh networking, the nodes in the network are mutually connected, and an integral network is formed among the nodes; the central node in the wireless Mesh network discovers and maintains the routing connection, eliminates the influence of single-point faults on services, and improves the network robustness by providing redundant paths so as to enable the cascade communication between the nodes to have wider coverage.
As a preferable technical means: the communication bin arranged on the electric energy meter also comprises
A carrier module: the main control unit is connected with the transformer side station area phase transmitting device and used for receiving communication data of the transformer side station area phase transmitting device and transmitting the data to the main control unit; after receiving a state activation command sent by the main control unit, the carrier module is switched from a dormant state to a working state, starts to receive communication data of the transformer side transformer area phase sending device and transmits the data to the main control unit; after receiving a sleep command sent by the main control unit, the carrier module enters a sleep state;
the main control unit comprises an acquisition module, a transformer area identification module and a power failure reporting module; the acquisition module is used for acquiring acquisition information through the service acquisition interface after receiving a data acquisition command sent by the service master station, sending the acquisition information to the crypto chip for data encryption, and sending the encrypted acquisition information to the communication module; the transformer area identification module is used for detecting current transformer area information after equipment is powered on, controlling the carrier module to enter a working state, enabling the carrier module to receive transformer area phase information data of a transformer side transformer area phase sending device, performing integrity confirmation after the data is received, comparing the integrity confirmation with originally stored data, locally storing the current transformer area phase information and sending the current transformer area phase information to the encryption chip for data encryption when the data is different, sending the encrypted transformer area information to the communication module, and then controlling the carrier module to enter a dormant state; and the power failure and restoration reporting module is used for sending the power failure and restoration information to the encryption chip for data encryption after detecting the power failure and restoration information of the power grid, and sending the encrypted power failure and restoration information to the communication module.
According to the technical scheme, local ad hoc network communication is realized through the 230MHz microgrid, and when one child node fails in communication, other nodes can automatically realize heavy networkingRouting is performed to ensure normal communication of other nodes 。
The station area phase identification is different from the existing bidirectional carrier communication mode, and the unidirectional carrier communication reduces the carrier interference and improves the data identification rate by adopting the annular identification technology combining the carrier communication and the wireless private network; after the carrier communication is finished, the module enters a dormant state, so that the energy consumption is reduced, and the line loss is reduced.
As a preferable technical means: the communication module is a pluggable communication module to adapt to different standards by replacing the communication module, and the communication module realizes local ad hoc network communication based on 230MHz to access a wireless repeater and a concentrator supporting a 230MHz microgrid. The format can be IoT-G230 and LTE-G230 formats. The communication cabin is compatible with IoT-G230 and LTE-G230 systems through a pluggable communication module, and the universality is improved. Based on 230MHz microgrid system have automatic network deployment, network structure, this microgrid system has strong for loRa, advantages such as networking wide range.
As a preferable technical means: the power supply module comprises a 12V power supply submodule and a backup power supply submodule; when the power supply is normal, the power supply is supplied by the 12V power supply submodule; when the power is cut off, the backup power supply submodule supplies power temporarily to report a short-time power-off event, and comprises a plurality of series capacitors. A backup power supply is arranged in the communication cabin, and when power is cut off, the function of reporting a short-time power-off event is realized.
As a preferable technical means: the shell is provided with a data interface, a 12V power interface and a 220V power line interface; the data interface is connected with the main control unit through a service acquisition interface circuit so as to transmit the electric meter data to the main control unit; the 12V power interface is connected with the power module to supply power; the 220V power line interface is connected with the carrier module to obtain information sent by the transformer side transformer area phase sending device.
As a preferable technical means: the shell is square and comprises an upper shell and a lower shell, a first PCB, a second PCB and a third PCB are arranged in the shell, the positions below, in the middle and above the first PCB, the second PCB and the third PCB are superposed, and a carrier module and a power module are arranged on the first PCB; the second PCB board is provided with a main control unit and a safety chip module; the third PCB is provided with a communication module; the inner wall of the shell is provided with a metal sheet connected with the communication module; the third PCB is arranged on the second PCB in an inserting mode; or the third PCB is fixedly connected to the second PCB, and the second PCB is arranged on the first PCB in an inserting mode; the third PCB and the second PCB are smaller than the first PCB in size. The first PCB, the second PCB and the third PCB are superposed, so that the space is fully utilized, and multifunctional integration is realized on the basis of not increasing the inner cavity of the shell. The first PCB, the second PCB and the third PCB can be positioned and communicated through the contact pins, and the PCB is high in reliability and compact in structure. The third PCB board is convenient to replace, the cost is reduced, and the use is flexible.
Another object of the present invention is to provide a networking method for a communication system based on a 230MHz microgrid, which comprises the following steps:
1) a node to be networked initiates a networking request;
2) the node to be accessed to the network broadcasts the group frame in the full frequency band;
3) after receiving the broadcast networking frame, the nodes which have accessed the network send the broadcast networking frame to the central node;
4) the central node judges whether the frame data is the network; if yes, go to step 5), if not, go to step 6)
5) The central node returns the network access permission frame to the node receiving the node broadcast group frame;
6) after receiving the network access permission frame, the node sends the network access permission frame to a node to be accessed to the network;
7) after the network access of the network access node is successful, ending;
8) the central node returns the network access refusing frame to the node receiving the node broadcast group frame;
9) after receiving the network access refusing frame, the node sends a network access request failure frame to the node to be accessed;
10) and finishing the network access failure of the network access node.
The central node in the wireless Mesh network can automatically discover and maintain the route connection, eliminate the influence of single-point faults on services, provide redundant paths, improve the network robustness, and enable the coverage to be wider due to the cascade communication among the nodes.
As a preferable technical means: the data forwarding includes the steps of,
a) the first node transmits a data frame T1;
b) after receiving the data frame T1, the second node merges the ACK frame and the forwarding frame and sends the ACK frame and the forwarding frame;
c) judging whether the first node receives the ACK frame, if so, determining that the first node confirms that the transmission is finished, and ending; if not, returning to the step a);
d) when the third node receives the data frame T1, an ACK frame is returned to the second node;
e) judging whether the second node receives the ACK frame; if yes, the second node confirms that the forwarding is completed and ends; and if the second node does not receive the ACK frame, returning to the step b).
The network utilization rate is increased, and the ACK frame and the forwarding frame are combined, so that a more concise forwarding process is realized. 2-frame transmission to 1-frame transmission
As a preferable technical means: all routing information from the node to the central node is stored in each node; the central node stores the routing information of all current nodes in the network;
when a node initiates data transmission, selecting a shortest transmission path in a routing pool for transmission, and appointing a data transmission path, after receiving data, a central node replies a transmission completion frame to the node; the node completes one data transmission after receiving;
if the transmission fails, the node tries data transmission of the same path for a plurality of times, and if the transmission fails, the node replaces the rest simplest path in the routing pool to carry out data transmission; after the completion, the node informs the central node of new routing information so as to update the routing pool information of the node and the central node;
if the node is tried out on all transmission paths in the routing pool and still cannot communicate, the node initiates a request for updating the router information, if the central node can receive the information and update the routing pool, the node repeats the steps to send data according to the new routing pool information, if the node cannot be connected to the central node, the node enters a disconnection state and initiates a network access application at intervals until the network access is successful;
when the network is idle, the central node initiates a network topology updating command in the whole communication network, and each node in the network sequentially performs data communication, updates a network routing table and maintains network links.
As a preferable technical means: according to the route jumping times, the network is layered, the self-networking adopts layered timing, and timing signals only act on directly received nodes without forwarding; the timing information adopts a two-way handshake confirmation mechanism to ensure that each node is synchronous. And in consideration of the time delay of each node module for receiving, processing and forwarding data and the time delay caused by the fact that no signal is received and needs to be retransmitted, a network layering mode is adopted, and the network synchronization is improved.
Has the advantages that:
firstly, adjusting the frequency to a special power frequency band of 230MHz, and realizing the mesh ad hoc network by matching a networking submodule, a routing pool submodule, a forwarding submodule and the like.
And secondly, in order to improve the communication rate of the ad hoc network, reduce the network delay and improve the network transmission quality, a hierarchical timing method is adopted for network timing, the method separately corrects the timing of modules of different transmission levels, and handshake two-way communication is adopted for timing, so that the synchronization of network clock signals is ensured.
Thirdly, dynamic length address: the dynamic length address is a globally unique address of the electric energy meter. A 645 protocol is adopted before 2019, the address is fixed in length by 6 bytes, a 698 protocol is adopted after 2019, and the address dynamic length (dynamic length address is defined in the way that 1-bit byte is used for representing the address length, the current electric meter address is read according to the length, and the electric meter address length is 1-16 bits). Because the old and new electric meters run simultaneously in the actual environment, the unique address of the electric energy meter is uniformly identified by adopting the dynamic length address, and the 645 and 698 protocols are adapted, so that the compatibility is realized.
Fourthly, relay address: the relay address is an identifier distributed after local communication networking of the electric energy meter, is unique in the local networking range, has the length of 2 bytes, is the maximum 25535, and is used for local communication. Compared with the dynamic length address of 2-17 bytes, the relay address of 2-bit fixed length bytes is adopted, the network bandwidth is saved, and the transmission efficiency is improved.
Fifthly, the node module actively accesses the network: the node module can initiate a network access application to the gateway, optimize a network access rule and improve network transmission efficiency.
And sixthly, optimizing a data transmission frame structure, combining and transmitting the ACK frame and part of the service frame, reducing network redundancy and improving the utilization rate of network resources.
And seventhly, optimizing a DSR routing algorithm, optimizing a retransmission path selection algorithm and improving the network resource utilization rate of retransmission data.
And ninthly, the communication cabin realizes local ad hoc network communication based on 230MHz and can be accessed to a wireless repeater and a concentrator supporting 230MHz microgrid.
Tenth, the station area phase identification is different from the existing bidirectional carrier communication mode, and the unidirectional carrier communication reduces the carrier interference and improves the data identification rate by adopting the annular identification technology combining the carrier communication and the wireless private network; after the carrier communication is finished, the module enters a dormant state, so that the energy consumption is reduced, and the line loss is reduced.
And eleventh, a backup power supply is arranged in the communication cabin, and when power is cut off, the function of reporting a short-time power-off event is realized.
Drawings
Fig. 1 is a schematic diagram of the operation of the present invention.
Fig. 2 is a block diagram of a communication bin architecture of the present invention.
Fig. 3 is a schematic view of a communication chamber for an electricity meter according to the present invention.
Fig. 4a is a topology diagram of a first example of the inventive networking.
Fig. 4b is a flow chart of a first example of networking of the present invention.
Fig. 5a is a data forwarding topology of the present invention.
Fig. 5b is a data forwarding flow diagram of the present invention.
Fig. 6 is a diagram of a routing pool of the present invention.
FIG. 7 is a hierarchical timing diagram of the present invention.
In the figure: 1. a housing; 101. an upper housing; 102. a lower housing; 2. A first PCB board; 3. a second PCB board; 4. A third PCB board; 5. and (4) a capacitor.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the drawings in the specification.
As shown in fig. 1 and 2, the communication system based on the 230MHz micro-grid of the present invention includes a communication cabin, where the communication cabin includes a housing, an antenna module, a main control unit disposed in the housing, a power supply module, a communication module, a service acquisition interface circuit, and a security chip module; wherein:
the main control unit: the device is used for routing addressing, data receiving and transmitting, forwarding, network management strategy control and ASE air interface encryption and comprises a memory for storage, a calculation processing module, an interface module, a networking module, a forwarding module and a routing pool module;
a communication module: the micro-grid communication module is connected with the main control unit, and is connected with a wireless repeater or other communication bins to realize data receiving and sending; meanwhile, the communication module also has the function of network interconnection, can be used as a routing node for multi-hop communication of other communication bins, and obtains the same wireless coverage range with lower transmitting power;
an antenna module: the communication module is connected with the communication module and is used for realizing communication with a 230MHz power wireless private network based on a coupling mode;
the service acquisition interface circuit: the micro-grid communication cabin is connected with the main control unit and provides a universal hardware instruction interface, and various service terminals are integrated with the micro-grid communication cabin through the interface to realize data communication; the service terminal comprises an intelligent ammeter, a charging pile and a water meter;
a security chip module: the system is connected with the main control unit and used for encrypting the information sent by the main control unit by a service layer;
a power supply module: the main control unit, the carrier module, the communication module and the safety chip are connected with each other and supply low-voltage direct-current power to the main control unit, the carrier module, the communication module and the safety chip;
a business terminal is provided with a communication cabin to form a node, the 230MHz microgrid of the power grid is based on Mesh networking, the nodes in the network are mutually connected, and an integral network is formed among the nodes; the central node in the wireless Mesh network discovers and maintains the routing connection, eliminates the influence of single-point faults on services, and improves the network robustness by providing redundant paths so as to enable the cascade communication between the nodes to have wider coverage.
As shown in fig. 3, in order to adapt to the electric energy meter service terminal, the communication cabin disposed on the electric energy meter further includes
A carrier module: the main control unit is connected with the transformer side station area phase transmitting device and used for receiving communication data of the transformer side station area phase transmitting device and transmitting the data to the main control unit; after receiving a state activation command sent by the main control unit, the carrier module is switched from a dormant state to a working state, starts to receive communication data of the transformer side transformer area phase sending device and transmits the data to the main control unit; after receiving a sleep command sent by the main control unit, the carrier module enters a sleep state;
the main control unit comprises an acquisition module, a distribution area identification module and a power failure reporting module; the acquisition module is used for acquiring acquisition information through the service acquisition interface after receiving a data acquisition command sent by the service master station, sending the acquisition information to the crypto chip for data encryption, and sending the encrypted acquisition information to the communication module; the transformer area identification module is used for detecting current transformer area information after equipment is powered on, controlling the carrier module to enter a working state, enabling the carrier module to receive transformer area phase information data of a transformer side transformer area phase sending device, performing integrity confirmation after the data is received, comparing the integrity confirmation with originally stored data, locally storing the current transformer area phase information and sending the current transformer area phase information to the encryption chip for data encryption when the data is different, sending the encrypted transformer area information to the communication module, and then controlling the carrier module to enter a dormant state; and the power failure and restoration reporting module is used for sending the power failure and restoration information to the encryption chip for data encryption after detecting the power failure and restoration information of the power grid, and sending the encrypted power failure and restoration information to the communication module.
Based on 230MHz microgrid system have automatic network deployment, network structure, this microgrid system has strong for loRa, advantages such as networking wide range.
The station area phase identification is different from the existing bidirectional carrier communication mode, and the unidirectional carrier communication reduces the carrier interference and improves the data identification rate by adopting the annular identification technology combining the carrier communication and the wireless private network; after the carrier communication is finished, the module enters a dormant state, so that the energy consumption is reduced, and the line loss is reduced.
The communication cabin realizes local ad hoc network communication based on 230MHz, and can access to a wireless repeater and a concentrator supporting 230MHz microgrid.
In order to realize the report of the short-time power-off event, the power supply module comprises a 12V power supply submodule and a backup power supply submodule; when the power supply is normal, the power supply is carried out by the 12V power supply submodule; when the power is cut off, the backup power supply submodule supplies power temporarily to report a short-time power-off event, and comprises a plurality of series capacitors 5. A backup power supply is arranged in the communication cabin, and when power is cut off, the function of reporting a short-time power-off event is realized.
In order to be conveniently and reliably connected with the electric energy meter, a data interface, a 12V power interface and a 220V power line interface are arranged on the shell 1; the data interface is connected with the main control unit through a service acquisition interface circuit so as to transmit the electric meter data to the main control unit; the 12V power interface is connected with the power module to supply power; the 220V power line interface is connected with the carrier module to obtain information sent by the transformer side transformer area phase sending device.
In order to realize the integrated installation of multiple modules, the shell 1 is square, a notch which is convenient to take and place is arranged on the shell 1 to be used as a handheld part, the shell 1 comprises an upper shell 101 and a lower shell 102, a first PCB 2, a second PCB 3 and a third PCB 4 are arranged in the shell 1, the positions below, in the middle and above the first PCB 2, the second PCB 3 and the third PCB 4 are superposed, and a carrier module and a power module are arranged on the first PCB 2; the second PCB 3 is provided with a main control unit and a safety chip module; the third PCB 4 is provided with a communication module; the inner wall of the housing 1 is provided with a metal sheet connected with the communication module. The first PCB board 2, the second PCB board 3 and the third PCB board 4 are superposed, so that the space is fully utilized, and on the basis of not increasing the inner cavity of the shell 1, multifunctional integration is realized. The first PCB board 2, the second PCB board 3 and the third PCB board 4 can be positioned and communicated through the contact pins, and the PCB is high in reliability and compact in structure.
To improve the flexibility of use and to reduce costs. The third PCB 4 is arranged on the second PCB 3 in a plugging way; or the third PCB 4 is fixedly connected to the second PCB 3, and the second PCB 3 is arranged on the first PCB 2 in an inserting mode. The third PCB 4 is convenient to replace, the cost is reduced, and the use is flexible.
The third PCB 4 and the second PCB 3 are smaller than the first PCB 2. The upper and lower superpose of many boards is effectively realized to the handheld portion is effectively avoided.
In order to fully utilize the limited space, 5 capacitors 5 are arranged at one corner of the first PCB 2, the 5 capacitors 5 are arranged in two rows, 3 capacitors 5 are positioned at the outer side, 2 capacitors 5 are positioned at the inner side of the 3 capacitors 5, and the capacitors 5 are 2.7V 2F capacitors 5; the third PCB 4 and the second PCB 3 are located at one side of the capacitor 5 to avoid the capacitor 5. The space is fully utilized, a plurality of capacitors 5 are connected in series to form an important component of the backup power supply, and the 5 capacitors 5 fully utilize the space. If single electric capacity 5 is capacious, then bulky, the scheduling problem can appear assembling not down, under the prerequisite of guaranteeing 5 volumes of electric capacity, if single electric capacity 5 volume is little, then need be greater than 5 electricity, also can appear occupying PCB face board too big, lead to the problem that other modules can not set up.
In order to improve the working reliability and avoid interference, the first PCB 2 is provided with a data interface, a 12V power interface and a 220V power line interface; the first PCB 2 is formed with a spacer to isolate strong current from weak current.
In order to realize the collection of multidata and reduce mutual interference, this first PCB 2 still is equipped with zero cross detection circuit, and this carrier module includes: the system comprises a carrier coupling circuit, a carrier receiving and filtering circuit, a carrier modulation and demodulation chip and a carrier sending circuit; the first PCB 2 where the carrier coupling circuit is arranged is provided with a separation groove. The strong current is basically arranged on the first PCB 2 and is separated from the communication module positioned on the third PCB 4, which is beneficial to improving the working stability.
Another object of the present invention is to provide a networking method for a communication system based on a 230MHz micro grid, which includes the following steps:
1) a node to be networked initiates a networking request;
2) the node to be accessed to the network broadcasts the group frame in the full frequency band;
3) after receiving the broadcast networking frame, the nodes which have accessed the network send the broadcast networking frame to the central node;
4) the central node judges whether the frame data is the network; if yes, go to step 5, if not, go to step 6
5) The central node returns the network access permission frame to the node receiving the node broadcast group frame;
6) after receiving the network access permission frame, the node sends the network access permission frame to a node to be accessed to the network;
7) after the network access of the network access node is successful, ending;
8) the central node returns the network access refusing frame to the node receiving the node broadcast group frame;
9) after receiving the network access refusing frame, the node sends a network access request failure frame to the node to be accessed;
10) and finishing the network access failure of the network access node.
The central node in the wireless Mesh network can automatically discover and maintain the route connection, eliminate the influence of single-point faults on services, provide redundant paths, improve the network robustness, and enable the coverage to be wider due to the cascade communication among the nodes.
Taking the topology of fig. 4a as an example, the flow is shown in fig. 4 b:
1. the node 4 broadcasts a network access request in a full frequency band, and the network access request is monitored by the node 3 and the node 2.
2. Node 3 forwards the network access request to node 1.
3. The node 1 forwards the network access request to a central node; the node 2 forwards the network access request to the central node.
4. The central node judges whether the network access request of the node 4 is legal or not.
5. If the network access is legal, the central node informs the node 1 of agreeing with the network access, and the central node informs the node 2 of agreeing with the network access.
6. The central node 1 informs the node 3 of the consent to network entry.
7. The node 3 informs the node 4 of successful network access and saves the route of the node 4 → the node 3 → the node 1 → the central node; node 2 informs node 4 of the success of the network entry and saves the route of node 4 → node 2 → central node.
8. The node 4 successfully accesses the network.
As shown in fig. 5a, a data forwarding topology, and a data forwarding flow as shown in fig. 5b, the data forwarding includes steps,
a) the first node transmits a data frame T1;
b) after receiving the data frame T1, the second node merges the ACK frame and the forwarding frame and sends the ACK frame and the forwarding frame;
c) judging whether the first node receives the ACK frame, if so, determining that the first node confirms that the transmission is finished, and ending; if not, returning to the step a);
d) when the third node receives the data frame T1, an ACK frame is returned to the second node;
e) judging whether the second node receives the ACK frame; if yes, the second node confirms that the forwarding is completed and ends; and if the second node does not receive the ACK frame, returning to the step b).
The network utilization rate is increased, and the ACK frame and the forwarding frame are combined, so that a more concise forwarding process is realized. The 2-frame transmission is changed to a 1-frame transmission.
In order to realize automatic networking, all routing information from the node to the central node is stored in each node; the central node stores the routing information of all current nodes in the network;
when a node initiates data transmission, selecting a shortest transmission path in a routing pool for transmission, and appointing a data transmission path, after receiving data, a central node replies a transmission completion frame to the node; the node completes one data transmission after receiving;
if the transmission fails, the node tries data transmission of the same path for a plurality of times, and if the transmission fails, the node replaces the rest simplest path in the routing pool to carry out data transmission; after the completion, the node informs the central node of new routing information so as to update the routing pool information of the node and the central node;
if the node is tried out on all transmission paths in the routing pool and still cannot communicate, the node initiates a request for updating the router information, if the central node can receive the information and update the routing pool, the node repeats the steps to send data according to the new routing pool information, if the node cannot be connected to the central node, the node enters a disconnection state, and network access application is initiated at intervals until network access is successful;
when the network is idle, the central node initiates a network topology updating command in the whole communication network, and each node in the network sequentially performs data communication, updates a network routing table and maintains network links.
As shown in FIG. 6, the routing pool is within each node, and the central node has routing information for all nodes currently in the network
A center node ↔ node 1, a center node ↔ node 2, a center node ↔ node 2 ↔ node 1, a center node ↔ node 1 ↔ node 2, a center node ↔ node 1 ↔ node 3, a center node ↔ node 2 ↔ node 1 ↔ node 3, a center node ↔ node 1 ↔ node 4 ↔ node 3, a center node ↔ node 1 ↔ node 2 ↔ node 4 ↔ node 3, a center node ↔ node 2 ↔ node 4 ↔ node 3, a center node ↔ node 1 ↔ node 4, a center node ↔ node 1 ↔ node 3 ↔ node 4, a center node ↔ node 1 ↔ node 2 ↔ node 4, and a center node ↔ node 2 ↔ node 4.
Each child node maintains a routing table from the node to the central node, taking node 3 as an example
The node 4 communicates with the central node, and as shown in the above figure, when the node 4 initiates data transmission, it will automatically select a shortest transmission path for transmission, and designate the data transmission path as node 4 → node 1 → the central node. After receiving the data, the central node replies with a transmission completion frame to the node 4,. After receiving the data, the node 4 completes one data transmission.
If the transmission fails, the node 4 will try to transmit data of the same path for 3 times, and if the transmission fails, the node 4 will replace the simplest path saved in the routing pool for data transmission. After completion, the node 4 informs the central node of new routing information to update the routing pool information of itself and the central node.
If all transmission paths in the routing pool are tried, communication still cannot be carried out, the node 4 initiates a request for updating the router information, if the central node can receive the information and update the routing pool, the node 4 repeats the steps to send data according to the new routing pool information, if the central node cannot be connected, the node 4 enters a disconnection state, software setting is not set to initiate a network access application at specific time intervals until network access is successful.
As shown in fig. 7, in order to improve the network synchronization, the network is layered according to the number of route hops, considering that each node module delays data reception, processing, forwarding, and even retransmission is required because no signal is received, if the same timing signal is used for all nodes in the network, the network synchronization cannot be guaranteed, and in order to improve the network synchronization, the project ad hoc network only acts on directly received nodes without forwarding the timing signal when layered timing is used. The timing information adopts a two-way handshake confirmation mechanism to ensure that each node is synchronous.
The communication system based on 230MHz piconet and the networking method thereof shown in the above figures are specific embodiments of the present invention, already show the substantial features and progress of the present invention, and it is within the scope of protection of the present solution to modify the same in shape, structure and the like according to the practical needs.
Claims (8)
1. Communication system based on 230MHz microgrid, its characterized in that: the communication cabin comprises a shell, an antenna module, a main control unit arranged in the shell, a power module, a communication module, a service acquisition interface circuit and a safety chip module; the communication cabin arranged on the electric energy meter also comprises a carrier module; wherein:
the main control unit: the device is used for routing addressing, data receiving, forwarding, network management strategy control and AES air interface encryption and comprises a memory, a calculation processing module, an interface module, a networking module, a forwarding module and a routing pool module;
a communication module: the micro-grid communication module is connected with the main control unit, and is connected with a wireless repeater or other communication bins to realize data receiving and sending; meanwhile, the communication module also has the function of network interconnection, can be used as a routing node for multi-hop communication of other communication bins, and obtains the same wireless coverage range with lower transmitting power;
an antenna module: the communication module is connected with the communication module and is used for realizing communication with other 230MHz microgrid central nodes or sub-nodes based on a coupling mode;
the service acquisition interface circuit: the system is connected with the main control unit and provides a general hardware instruction interface, and various service terminals realize data communication through the interface; the service terminal comprises an intelligent ammeter, a charging pile and a water meter;
a security chip module: the system is connected with the main control unit and used for encrypting the information sent by the main control unit in a service layer;
a power supply module: the low-voltage direct-current power supply is connected with the main control unit, the carrier module, the communication module and the safety chip and supplies low-voltage direct-current power to the main control unit, the carrier module, the communication module and the safety chip;
a carrier module: the system comprises a main control unit, a phase transmitting device, a transformer side zone phase transmitting device, a phase receiving device and a phase receiving device, wherein the main control unit is connected with the phase transmitting device and used for receiving communication data of the phase transmitting device of the transformer side zone and transmitting the data to the main control unit; after receiving a state activation command sent by the main control unit, the carrier module is switched from a dormant state to a working state, starts to receive communication data of the transformer side transformer area phase sending device and transmits the data to the main control unit; after receiving a sleep command sent by the main control unit, the carrier module enters a sleep state;
the main control unit also comprises an acquisition module, a transformer area identification module and a power failure reporting module; the acquisition module is used for acquiring acquisition information through the service acquisition interface after receiving a data acquisition command sent by the service master station, sending the acquisition information to the encryption chip for data encryption, and sending the encrypted acquisition information to the communication module; the transformer area identification module is used for detecting current transformer area information after equipment is powered on, controlling the carrier module to enter a working state, enabling the carrier module to receive transformer area phase information data of a transformer side transformer area phase sending device, performing integrity confirmation after the data is received, comparing the integrity confirmation with originally stored data, locally storing the current transformer area phase information and sending the current transformer area phase information to the encryption chip for data encryption when the data is different, sending the encrypted transformer area information to the communication module, and then controlling the carrier module to enter a dormant state; the power failure and restoration reporting module is used for sending power failure and restoration information to the encryption chip for data encryption after detecting the power failure and restoration information of the power grid, and sending the encrypted power failure and restoration information to the communication module;
a service terminal integrated communication cabin forms a node, the 230MHz microgrid of the power grid is based on a Mesh ad hoc network, the nodes in the network are mutually connected, and an integral network is formed among the nodes; the central node in the wireless Mesh ad hoc network discovers and maintains the route connection, eliminates the influence of single-point fault on the service, and improves the network robustness by providing a redundant path so as to enable the cascade communication coverage among the nodes to be wider;
according to the route jumping times, the network is layered, the self-networking adopts layered timing, and timing signals only act on directly received nodes without forwarding; and the timing information adopts a two-way handshake confirmation mechanism to ensure that each node is synchronous.
2. The 230 MHz-based piconet communication system of claim 1, wherein: the communication module is a pluggable communication module so as to adapt to different modes by replacing the communication module; the communication module realizes local ad hoc network communication based on 230MHz so as to access a wireless repeater and a concentrator supporting 230MHz microgrid.
3. The 230 MHz-based piconet communication system of claim 1, wherein: the power supply module comprises a 12V power supply submodule and a backup power supply submodule; when the power supply is normal, the power supply is supplied by the 12V power supply submodule; when the power is cut off, the backup power supply submodule supplies power temporarily to report a short-time power-off event, and comprises a plurality of series capacitors.
4. The 230 MHz-based piconet communication system of claim 1, wherein: the shell is provided with a data interface, a 12V power interface and a 220V power line interface; the data interface is connected with the main control unit through a service acquisition interface circuit so as to transmit the electric meter data to the main control unit; the 12V power interface is connected with the power module to supply power; the 220V power line interface is connected with the carrier module to obtain information sent by the transformer side transformer area phase sending device.
5. The 230 MHz-based piconet communication system of any one of claims 1-4, wherein: the shell is square and comprises an upper shell and a lower shell, a first PCB, a second PCB and a third PCB are arranged in the shell, the positions below, in the middle and above the first PCB, the second PCB and the third PCB are superposed, and a carrier module and a power module are arranged on the first PCB; the second PCB board is provided with a main control unit and a safety chip module; a communication module is arranged on the third PCB; the inner wall of the shell is provided with a metal sheet connected with the communication module; the third PCB is arranged on the second PCB in an inserting mode; or the third PCB is fixedly connected to the second PCB, and the second PCB is arranged on the first PCB in an inserting mode; the third PCB and the second PCB are smaller than the first PCB in size.
6. A networking method using a 230 MHz-based piconet communication system according to any one of claims 1-5, comprising the steps of:
1) a node to be networked initiates a networking request;
2) the node to be accessed to the network broadcasts the group frame in the full frequency band;
3) after receiving the broadcast networking frame, the nodes which have accessed the network send the broadcast networking frame to the central node;
4) the central node judges whether the frame data is the network; if yes, go to step 5), if not, go to step 8)
5) The central node returns the network access permission frame to the node receiving the broadcast group frame;
6) after receiving the network access permission frame, the node sends the network access permission frame to a node to be accessed to the network;
7) after the network access of the network access node is successful, ending;
8) the central node returns the network access rejection frame to the node receiving the broadcast group frame;
9) after receiving the network access refusing frame, the node sends a network access request failure frame to the node to be accessed;
10) and finishing the network access failure of the network access node.
7. The networking method of claim 6, wherein: further comprising the following data forwarding step of,
a) the first node transmits a data frame T1;
b) after receiving the data frame T1, the second node merges the ACK frame and the forwarding frame and sends the ACK frame and the forwarding frame;
c) judging whether the first node receives the ACK frame, if so, determining that the first node confirms that the transmission is finished, and ending; if not, returning to the step a);
d) when the third node receives the data frame T1, an ACK frame is returned to the second node;
e) judging whether the second node receives the ACK frame; if yes, the second node confirms that the forwarding is completed and ends; and if the second node does not receive the ACK frame, returning to the step b).
8. The networking method according to claim 7, wherein: all routing information from the node to the central node is stored in each node; the central node saves the routing information of all current nodes in the network;
when a node initiates data transmission, selecting a shortest transmission path in a routing pool for transmission, and appointing a data transmission path, after receiving data, a central node replies a transmission completion frame to the node; the node completes one data transmission after receiving;
if the transmission fails, the node tries data transmission of the same path for a plurality of times, and if the transmission still fails, the node replaces the rest simplest path in the routing pool to carry out data transmission; after the completion, the node informs the central node of new routing information so as to update the routing pool information of the node and the central node;
if the node is tried out on all transmission paths in the routing pool and still cannot communicate, the node initiates a request for updating the router information, if the central node can receive the information and update the routing pool, the node repeats the steps to send data according to the new routing pool information, if the node cannot be connected to the central node, the node enters a disconnection state, and network access application is initiated at intervals until network access is successful;
when the network is idle, the central node initiates a network topology updating command in the whole communication network, and each node in the network sequentially performs data communication, updates a network routing table and maintains network links.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910670157.8A CN110519866B (en) | 2019-07-24 | 2019-07-24 | Communication system based on 230MHz microgrid and networking method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910670157.8A CN110519866B (en) | 2019-07-24 | 2019-07-24 | Communication system based on 230MHz microgrid and networking method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110519866A CN110519866A (en) | 2019-11-29 |
| CN110519866B true CN110519866B (en) | 2022-07-05 |
Family
ID=68624003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910670157.8A Active CN110519866B (en) | 2019-07-24 | 2019-07-24 | Communication system based on 230MHz microgrid and networking method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110519866B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111465106B (en) * | 2020-03-02 | 2023-11-14 | 浙江华云信息科技有限公司 | Unlicensed frequency band communication method for smart power grid |
| CN111405640B (en) * | 2020-03-09 | 2022-01-04 | 上海迈内能源科技有限公司 | Low-power-consumption wireless networking communication method |
| CN113784303A (en) * | 2021-09-28 | 2021-12-10 | 广东电网有限责任公司 | Electric power wireless Internet of things system |
| CN114157559A (en) * | 2021-12-15 | 2022-03-08 | 深圳绿米联创科技有限公司 | Network processing method, network processing system, electronic device, and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103632224A (en) * | 2013-11-28 | 2014-03-12 | 哈尔滨电工仪表研究所 | Automatic management system of electric power meter |
| CN203596099U (en) * | 2013-12-18 | 2014-05-14 | 国家电网公司 | Electricity utilization information collection system |
| CN103957570A (en) * | 2014-05-07 | 2014-07-30 | 重庆大学 | Network communication system used for power load control and routing algorithm thereof |
| CN105046935A (en) * | 2015-08-13 | 2015-11-11 | 青岛东软载波科技股份有限公司 | Dual mode heterogeneous communication system based on low voltage power line and micropower wireless |
| WO2016008272A1 (en) * | 2014-07-15 | 2016-01-21 | 宽兆科技(深圳)有限公司 | Multi-channel data transmission base station and remote electricity meter reading system based on same |
| CN205725831U (en) * | 2016-03-25 | 2016-11-23 | 华北电力大学 | It is applied to electrical network Real-Time Scheduling and the electricity consumption data encryption system with fault tolerant mechanism |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9615270B2 (en) * | 2013-11-04 | 2017-04-04 | State Grid Corporation Of China | Intelligent power utilization communication product detecting system |
-
2019
- 2019-07-24 CN CN201910670157.8A patent/CN110519866B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103632224A (en) * | 2013-11-28 | 2014-03-12 | 哈尔滨电工仪表研究所 | Automatic management system of electric power meter |
| CN203596099U (en) * | 2013-12-18 | 2014-05-14 | 国家电网公司 | Electricity utilization information collection system |
| CN103957570A (en) * | 2014-05-07 | 2014-07-30 | 重庆大学 | Network communication system used for power load control and routing algorithm thereof |
| WO2016008272A1 (en) * | 2014-07-15 | 2016-01-21 | 宽兆科技(深圳)有限公司 | Multi-channel data transmission base station and remote electricity meter reading system based on same |
| CN105046935A (en) * | 2015-08-13 | 2015-11-11 | 青岛东软载波科技股份有限公司 | Dual mode heterogeneous communication system based on low voltage power line and micropower wireless |
| CN205725831U (en) * | 2016-03-25 | 2016-11-23 | 华北电力大学 | It is applied to electrical network Real-Time Scheduling and the electricity consumption data encryption system with fault tolerant mechanism |
Non-Patent Citations (1)
| Title |
|---|
| "基于IPv6 的低压电力线载波树型路由控制机制";向敏等;《电网技术》;20160630;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110519866A (en) | 2019-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110519866B (en) | Communication system based on 230MHz microgrid and networking method thereof | |
| CN109660958B (en) | Networking method of electric power meter reading system and meter reading method | |
| CN110856194B (en) | Dual-mode fusion networking method and communication method | |
| CN111739275B (en) | Control method, control device, control equipment and storage medium for dual-mode communication | |
| CN101527968B (en) | Interaction method between space network and ground network, and communication protocol gateway | |
| CN103874291A (en) | Power line carrier-based intelligent networking control system and method | |
| KR101389405B1 (en) | Method for managing the transfer of information packets across a wireless network and routing nodes implementing it | |
| US20230093492A1 (en) | Lorawan gateway network and method | |
| CN104201776A (en) | Wireless IPV6 (Internet Protocol Version 6) ad-hoc network communication system for intelligent ring main unit | |
| CN112367658B (en) | Wireless communication system based on master-slave structure and dynamic ad hoc network method thereof | |
| CN105873169A (en) | Wireless ad-hoc network communication method | |
| CN110249634B (en) | Electricity meter comprising a power line interface and at least one radio frequency interface | |
| CN105007587A (en) | Multi-network coverage apparatus and method having network selection function | |
| CN112040463A (en) | Wireless communication network networking method and system based on LoRa equipment | |
| CN209787196U (en) | IPv6 access type multi-network convergence gateway system | |
| CN114143899B (en) | Channel access method of broadband carrier network | |
| CN101325545B (en) | Method for designing redundancy route in industry wireless communication network | |
| CN102202430A (en) | Zigbee wireless gateway and data transmission method thereof | |
| KR101077750B1 (en) | Method for Transmitting Up-Link Data of Master-Slave System, and Extended Apparatus for Programmable Logic Controller System | |
| CN110381563A (en) | A kind of uplink resources allocation strategy of self-organizing relay forwarding network | |
| CN115696254A (en) | Big data transmission method of wireless sensor network | |
| CN102427381A (en) | Satellite base station system | |
| CN203261513U (en) | Intelligent street lamp control system based on power line carrier waves | |
| CN115086899A (en) | Wireless network working method and system | |
| CN103167696A (en) | Intelligent streetlamp control system and method based on power line carriers |
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 |