CN110401971B - Communication method based on 230MHz electric power special frequency band intelligent ad hoc network - Google Patents
Communication method based on 230MHz electric power special frequency band intelligent ad hoc network Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
- H04W40/248—Connectivity information update
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- 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
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Abstract
The invention discloses a communication method of an intelligent ad hoc network based on a 230MHz power special frequency band, and relates to the field of power data acquisition and communication. At present, linear topological structures are mainly adopted among electric power data acquisition equipment, and the problems of small networking coverage range, short transmission distance and complex network address allocation exist. The invention comprises the following steps: after other nodes in the transmission distance coverage range receive the network access application, responding to the response; after receiving path data returned by a plurality of adjacent nodes, nodes sending the network access application are sequenced according to the priority rules of less levels of the central node and stronger signals if the levels are the same, and a network access verification request is sent to each path in sequence; if the node sending the network access verification receives the message of successful authentication of the central node, the network access is completed, and the routing table is updated, and the current routing path is set as default. The technical scheme solves the problem that point-to-point direct wireless communication cannot be carried out due to long distance, and ensures effective construction of a wireless network.
Description
Technical Field
The invention relates to the field of power data acquisition and communication, in particular to a communication method of an intelligent ad hoc network based on a 230MHz power special frequency band.
Background
At present, a linear topological structure is mainly adopted among electric power data acquisition equipment. When a wireless networking mode is adopted between the meter and the concentrator, the wireless networking mode mainly comprises a root node and a plurality of routing nodes; the problems of small networking coverage range, short transmission distance and complex network address allocation 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 method of the intelligent ad hoc network based on the 230MHz electric power special frequency band so as to achieve the purpose of expanding the coverage of the wireless ad hoc network. Therefore, the invention adopts the following technical scheme.
A communication method based on an intelligent ad hoc network of a 230MHz power private frequency band is characterized by comprising an ad hoc network, wherein the ad hoc network comprises the following steps:
1) deploying a wireless router, accessing the wireless router to a service master station through an optical fiber, a wireless private network or a wireless public network, and setting a terminal communication module file list authorized to be accessed when the wireless router is used as a central node of an ad hoc network;
2) deploying a terminal communication module, using the terminal communication module as a network node after the terminal communication module is started, broadcasting and sending a network access application, and entering a step 3 in a normal process, wherein if a response signal is not received, the module continues to wait for response until the response is overtime; if the time is out, after a period of time, the terminal communication module broadcasts and sends the network access application again until receiving a network access application response or enabling the module to exit the network access application state through a command;
3) after other nodes in the transmission distance coverage range receive the network access application, responding, wherein the responding content is the path from the node to the central node; if the terminal applying for network access is directly connected to the central node, the step is skipped;
4) after receiving path data returned by a plurality of adjacent nodes, the nodes sending the network access application are sorted according to the priority rules with less hierarchy and stronger signals if the hierarchy is the same as that of a central node, a routing table is established, and then a network access verification request 'ready' is sent to each path in turn according to the routing sequence;
5) the central node receives the network access verification request, judges whether the address of the request node is in an authorized file, if so, the central node allocates a 2-byte unique identifier to the child node as a short number and replies a successful authentication message, and simultaneously adds a routing path from the node to the central node into a routing list of the central node, otherwise, replies a failed authentication message; the short number is used as a subsequent address related to the communication between the central node and the child node;
6) and if the node which sends the network access verification receives the message that the authentication of the central node is successful, completing the network access, updating the routing table, setting the current routing path as default, and completing the self-organizing network access of the node. Sending; and (5) sending information to the central node, and finishing the network access process.
The technical scheme is suitable for a wireless ad hoc network data transmission scheme under a 230MHz power special frequency band, data receiving and transmitting are achieved, and a network layer achieves a wireless ad hoc network function. On the network layer, data is transparently transmitted, different applications are borne by the application layer, the whole wireless network is automatically completed in the construction process, and the wireless network self-organization is realized; the problem that point-to-point direct wireless communication cannot be carried out due to long distance is solved, and effective construction of a wireless network is guaranteed. The data transmission method provided by the invention ensures effective transmission of data transmission in a hierarchical forwarding mode; the problem of data collision caused by multi-node data transmission is solved.
As a preferable technical means: further comprising the data transmission step: the data transmission step comprises data transmission of events issued by the service master station; after the ad hoc network is formed, when a master station needs to issue an event, the master station sends a message to a wireless repeater, the message carries a file number of a terminal communication module, the file number is called a long number for short, the wireless router finds a corresponding short number and a routing path according to the long number, and the wireless repeater issues the message to a corresponding sub-node terminal communication module according to the routing path.
As a preferable technical means: the data transmission step comprises the data transmission of an event actively reported by the terminal communication module, and after the ad hoc network is formed, the process of the event actively reported by the terminal communication module is that the terminal communication module firstly sends a message to the wireless router according to a default routing path, and the router reports the message to the master station.
Has the advantages that:
firstly, the whole wireless network is automatically completed in the construction process, so that the wireless network self-organization is realized; the problem that point-to-point direct wireless communication cannot be carried out due to long distance is solved, effective construction of a wireless network is guaranteed, 230 MHz-based wireless ad hoc network is realized, the coverage range is improved, the transmission distance is increased, the network address transmission flow is reduced, and the communication stability and reliability are improved.
The data transmission method ensures effective transmission of data transmission in a hierarchical forwarding mode and solves the problem of data collision caused by multi-node data transmission.
Thirdly, the file number of the terminal communication module is unique, but the length is long and 16 bytes exist, and according to the service requirement that the terminal communication module only needs to be numbered uniquely under one wireless repeater; in the category of wireless repeater networking, a unique 2-byte short number is allocated to each terminal communication module, 14 bytes can be reduced in each communication, and network flow is effectively saved.
Drawings
Figure 1 is a flow chart of the ad hoc network of the present invention.
Fig. 2 is a topology diagram of the present invention.
Fig. 3 is a packet composition diagram.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the drawings in the specification.
The communication method of the invention comprises an ad hoc network method and a data transmission method.
One) as shown in fig. 1, the ad hoc network step includes:
1) deploying a wireless router, accessing the wireless router to a service master station through an optical fiber, a wireless private network or a wireless public network, and setting a terminal communication module file list authorized to be accessed when the wireless router is used as a central node of an ad hoc network;
2) deploying a terminal communication module, using the terminal communication module as a network node after the terminal communication module is started, broadcasting and sending a network access application 'join request', and entering a step 3 in a normal process, wherein if a response signal is not received, the module continues to wait for response until the response is overtime; if the time is out, after a period of time, the terminal communication module broadcasts and sends the network access application again until receiving a network access application response or enabling the module to exit the network access application state through a command;
3) after other nodes in the transmission distance coverage range receive the network access application, reply responses are: "join ack", the response content is the path from the node to the central node; if the terminal applying for network access is directly connected to the central node, the step is skipped;
4) after receiving path data returned by a plurality of adjacent nodes, the nodes sending the network access application are sorted according to the priority rules with less hierarchy and stronger signals if the hierarchy is the same as that of a central node, a routing table is established, and then a network access verification request 'ready' is sent to each path in turn according to the routing sequence;
5) the central node receives the network access verification request, judges whether the address of the request node is in an authorized file, if so, the central node allocates a 2-byte unique identifier to the child node as a short number and replies a successful authentication message, and simultaneously adds a routing path from the node to the central node into a routing list of the central node, otherwise, replies a failed authentication message; the short number is used as a subsequent address related to the communication between the central node and the child node; the reply message is "confirm request";
6) and if the node which sends the network access verification receives the message that the authentication of the central node is successful, completing the network access, updating the routing table, setting the current routing path as default, and completing the self-organizing network access of the node. And sending 'confirm ack' information to the central node, and ending the network access process.
The technology is suitable for a wireless ad hoc network data transmission scheme under a 230MHz power special frequency band, the technology is based on SX126x series wireless low-power-consumption chips of semtech company, a mac layer adopts LoraMac to realize data receiving and transmitting, and a network layer realizes a wireless ad hoc network function. On the network layer, data is transparently transmitted, different applications are borne by the application layer, the whole wireless network is automatically completed in the construction process, and the wireless network self-organization is realized; the problem that point-to-point direct wireless communication cannot be carried out due to long distance is solved, and effective construction of a wireless network is guaranteed. The data transmission method provided by the invention ensures effective transmission of data transmission in a hierarchical forwarding mode; the problem of data collision caused by multi-node data transmission is solved, and the network topology is shown in FIG. 2.
A data transmission step: the data transmission step comprises data transmission of events issued by the service master station; after the ad hoc network is formed, when a master station needs to issue an event, the master station sends a message to a wireless router, the message carries a file number of a terminal communication module, the file number is called a long number for short, the wireless router finds a corresponding short number and a routing path according to the long number, and the wireless router issues the message to a corresponding sub-node terminal communication module according to the routing path.
Two) data transmission
The data transmission process can be divided into two types, namely that a service master station sends an event to a specified terminal communication module and the terminal communication module actively reports the event.
The process of the master station issuing the event to the appointed terminal communication module is that the master station firstly sends a message to the wireless router, the message carries the file number of the terminal communication module, the long number for short, and then the corresponding short number and the routing path are found according to the long number, so that the message is issued to the terminal communication module.
The active reporting event flow of the terminal communication module is that the terminal communication module firstly sends the message to the wireless router according to the default routing path, and the router reports the message to the master station.
When the terminal communication module performs data transmission, the data packet structure is as shown in fig. 3.
The communication method of the intelligent ad hoc network based on the 230MHz power exclusive frequency band shown in fig. 1-2 is a specific embodiment of the present invention, which already embodies the substantial features and the progress of the present invention, and can be modified equivalently in the aspects of shape, structure and the like according to the practical use requirements, and is within the protection scope of the present solution.
Claims (3)
1. A communication method based on an intelligent ad hoc network of a 230MHz power private frequency band is characterized by comprising an ad hoc network method, wherein the ad hoc network comprises the following steps:
1) deploying a wireless router, accessing the wireless router to a service master station through an optical fiber, a wireless private network or a wireless public network, and setting a terminal communication module file list authorized to be accessed when the wireless router is used as a central node of an ad hoc network;
2) deploying a terminal communication module, using the terminal communication module as a network node after the terminal communication module is started, broadcasting and sending a network access application, and entering a step 3 in a normal process, wherein if a response signal is not received, the module continues to wait for response until the response is overtime; if the time is out, after a period of time, the terminal communication module broadcasts and sends the network access application again until receiving a network access application response or enabling the module to exit the network access application state through a command;
3) after other nodes in the transmission distance coverage range receive the network access application, responding, wherein the responding content is the path from the node to the central node; if the terminal applying for network access is directly connected to the central node, the step is skipped;
4) after receiving path data returned by a plurality of adjacent nodes, the nodes sending the network access application are sorted according to the priority rules with less levels to the central node and strong signals if the levels are the same, a routing table is established, and then network access verification requests are sent to each path in turn according to the routing sequence;
5) the central node receives the network access verification request, judges whether the address of the request node is in an authorized file, if so, the central node allocates a 2-byte unique identifier to the child node as a short number and replies a successful authentication message, and simultaneously adds a routing path from the node to the central node into a routing list of the central node, otherwise, replies a failed authentication message; the short number is used as a subsequent address related to the communication between the central node and the child node;
6) if the node which sends the network access verification receives the message that the authentication of the central node is successful, the network access is completed, the routing table is updated, the current routing path is set as default, and the self-organizing network access of the node is completed; and sending the information to the central node, and finishing the network access process.
2. The communication method of the intelligent ad hoc network based on the 230MHz power proprietary frequency band according to claim 1, characterized in that: the data transmission method comprises the step of transmitting data of an event sent by the service master station; after the ad hoc network is formed, when a master station needs to issue an event, the master station sends a message to a wireless router, the message carries a file number of a terminal communication module, the file number is called a long number for short, the wireless router finds a corresponding short number and a routing path according to the long number, and the wireless router issues the message to a corresponding sub-node terminal communication module according to the routing path.
3. The communication method of the intelligent ad hoc network based on the 230MHz power proprietary frequency band according to claim 2, characterized in that: the data transmission also comprises data transmission of an event actively reported by the terminal communication module, and after the ad hoc network is formed, the process of the event actively reported by the terminal communication module is that the terminal communication module firstly sends a message to the wireless repeater according to a default routing path, and the repeater reports the message to the master station.
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| CN111200669B (en) * | 2019-12-31 | 2022-12-27 | 广西诚新慧创科技有限公司 | Wireless ad hoc network method and system for power transmission line |
| CN112738812B (en) * | 2020-12-24 | 2024-05-03 | 普联国际有限公司 | Wireless network automatic adjustment method, device, terminal equipment and storage medium |
| CN112969211B (en) * | 2021-02-25 | 2024-03-15 | 新开普电子股份有限公司 | LoRa (loRa) ad hoc network method and system of network structure |
| CN112995960B (en) * | 2021-03-09 | 2023-10-31 | 保定市兆微软件科技有限公司 | Data transmission method for direct communication of chained networking terminal |
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