CN112423365A - MESH networking communication method for LoRa communication of power distribution station equipment - Google Patents
MESH networking communication method for LoRa communication of power distribution station equipment Download PDFInfo
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Abstract
The invention relates to a LoRa networking method of a MESH networking structure suitable for a power distribution area, which comprises the following steps: s1: building an LoRa networking system comprising a main node and N sub-nodes; s2: collecting and sequencing child node ID files in the system; s3: respectively taking each online node as a main node by adopting a token rotation method; s4: the main node sequentially sends COM5 command LoRa messages to all the offline nodes; s5: then, taking local online nodes as main nodes to sequentially repeat the S4 process in turn until a multi-layer MESH routing network structure is established; s6: after the MESH routing structure is built, the main node sends out COM11 messages to each child node according to the matched logical address, and uploads the messages according to the routing surface layer until the messages return to the main node. The invention can automatically access the newly added node, and greatly improves the traditional wireless networking, so that the requirement of wireless communication in a power distribution area is met.
Description
Technical Field
The invention belongs to the technical field of communication, relates to a power distribution station communication control technology, and particularly relates to an MESH networking communication method for LoRa communication of power distribution station equipment.
Background
The invention provides an MESH networking communication method for communication of distribution substation equipment LoRa by adopting an LoRa communication structure based on a wireless MESH networking technology, aiming at the current situations that distance intervals among communication nodes of a distribution substation are far, the communication nodes are easy to be blocked and interfered, single-hop direct connection cannot meet requirements, repeaters are difficult to increase, installation and maintenance are difficult, and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the MESH networking communication method for the LoRa communication of the equipment in the power distribution area, which aims at solving the problems of the prior star networking technology in the power distribution area, can realize the functions of automatically repairing the off-line sub-node routing structure by using the remote nodes which cannot be directly connected by the multi-stage relay master nodes, automatically accessing newly added nodes and the like.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a LoRa networking method of a MESH networking structure suitable for a power distribution area comprises the following steps:
s1: the method comprises the steps that a LoRa networking system comprising a main node and N sub-nodes is established, the main node is an information gathering point, and the sub-nodes are information acquisition points;
s2: when communication is achieved, the ID files of the sub-nodes in the system are collected firstly, the main node sequences after receiving the identification codes of the sub-nodes, the sequenced logic address sub-nodes do not reply any more, and the rest unordered sub-nodes reply according to the time determined by the random function and execute in sequence until no unordered node is added;
s3: after the first layer is formed, the main node has M online nodes, each online node is used as a main node by adopting a token rotation method, the lower-layer child nodes of each online node are sequentially formed and obtained, and each layer of online child nodes are sequentially reported to the upper-layer father node until the main node has 12-byte ID file numbers of all the layers of child nodes and related logical address numbers thereof;
s4: the main node firstly realizes the process of establishing the route, the main node sequentially sends out COM5 command LoRa messages for all off-line nodes according to the stored ID files of the sub-nodes, the sub-nodes compare with the ID serial numbers of the sub-nodes when receiving the COM5 messages, if the COM5 messages are consistent, the sub-nodes receive pairing and return the COM2 messages to the upper layer;
s5: then, taking local online nodes as main nodes to sequentially repeat the S4 process in turn until a multi-layer MESH routing network structure is established;
s6: after the MESH routing structure is built, the main node sends out COM11 message to each sub-node according to the matched logical address, the message contains the content message information to be transmitted, the intermediate sub-node forwards the message to the next layer according to the routing table structure after receiving the message, the target sub-node packs the content message information of the main node to be replied to the COM12 message to return to the upper layer node after receiving the message, and uploads the content message information to the main node according to the routing surface layer until returning to the main node.
Furthermore, the master node is connected with N sub-nodes through a multi-layer routing structure, each sub-node is represented by a corresponding 12-byte unique ID which is used as a networking sub-node identification, and the ID is derived from a global unique ID number of an MCU used for communication.
Moreover, the method for collecting the ID file of the child node in the system comprises the following steps: the main node with the logical node number of 0 sends out a broadcast number-seeking frame COM16, a sub-node group A set (i is 1 … a) receives the message, the sub-nodes are in a COM16 message receiving state in an unmatched state, the loop is performed once every 100ms, an interrupt callback function is used for receiving the LORA message, after the COM16 is received, a random time ts in 0-3 seconds is calculated by using a random function, different responding sub-nodes return to the main node after the ts time, other nodes to be accessed are in a monitoring state, and the message is delayed from being sent when the sub-nodes are found to be in the air.
Furthermore, in S3, if the master node manually enters the ID file list for creating all the child nodes in the distribution area, the processes of S2 and S3 are not required, and the logical address of each child node is valid only in each networking.
In addition, in S4, the packet includes the 12-byte ID profile number of the relevant node and the logical address number assigned to the packet when the packet is sent out, after a round of COM5 is finished, the main node will return the child node of the COM2 packet as its local online node, and the main node will form a local routing table and a secondary routing table structure.
Furthermore, in S6, the packet goes through one layer, i.e., local online nodes of the master node or across a multi-layer routing structure via intermediate child nodes, i.e., using a secondary routing table for each node.
And if the source address for sending the query is the main node, sending a COM5 message containing an offline node ID file number and a distributed logic address, and checking whether the offline node can become a local online node, otherwise, each layer of nodes sequentially contain an offline node ID file to be queried and a matched logic address in each COM11 total message, if the related offline node receives an ID file number which is contained in the COM11 message and is the same as the ID file number of the node, sending a COM2 message to a target address at the first time before a target address sub-node in the message replies COM12, and after receiving the COM2 message, immediately incorporating the offline node into the local online node of the node and reporting the route along with the COM12 message by the target sub-node, so as to form a local repair mechanism of the offline node.
In addition, in the LoRa message transceiving process, each node monitors the LoRa message in the space.
In addition, the multi-type sub-node equipment shares LoRa communication resources, equipment type layers are set in the main node, different types of equipment are endowed with corresponding type codes, each frame of message contains type information during communication, and the type information is uploaded by the sub-nodes.
And when no LORA message is received and sent, the system automatically enters a network maintenance communication stage, a main node sends out polling short messages, traverses all online sub-nodes of each layer, gives the offline nodes to each polling message for checking, accesses any offline node which can be accessed at any time, removes any offline node from the system, and performs local network recombination optimization.
The invention has the advantages and positive effects that:
the method can fundamentally solve the problems that the distance between communication nodes of the power distribution area is long, the power distribution area is easy to be shielded and interfered, the requirement cannot be met by single-hop direct connection, the repeater is difficult to increase, the installation and maintenance are difficult and the like in the wireless communication of the power distribution area, and is suitable for large-scale application and popularization of the power distribution area.
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Fig. 1 is a diagram of a networking architecture of the present invention.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
An LoRa networking method of a MESH networking structure suitable for a power distribution area is shown in fig. 1, and the implementation includes the following steps:
s1: and establishing a LoRa networking system comprising a main node and N sub-nodes, wherein the main node is an information gathering point. The child nodes are information acquisition points. The main node is connected with N sub-nodes through a multi-layer routing structure, each sub-node is represented by a corresponding 12-byte unique ID which is used as a networking sub-node identification, and the ID is from a globally unique ID number of an MCU used for communication.
S2: when the communication is implemented, a process of collecting the ID file of the child node in the system is performed first, the master node (logical node number is 0) sends a broadcast request frame COM16, and the child node group a set (i ═ 1 … a) receives the message. The sub-nodes are in a state of receiving COM16 messages in an unmatched state, the LORA messages are received by using an interrupt callback function at a cycle of 100ms, a random time ts in 0-3 seconds is calculated by using a random function after the COM16 is received, different response sub-nodes return to the main node with 12-byte identification codes after the ts time, other nodes to be accessed are in a monitoring state, and the sending of the messages is delayed when the messages in the air are found. After receiving the identification codes, the main node numbers the identification codes according to the sequence and arranges the identification codes into a node archive list. After the specified time, the master node inquires once according to the received file identification code list and determines the logical address, which is called sequencing process. Thereafter, the master node asks COM16 again, and the sequenced logical address child nodes do not reply, and the remaining un-sequenced child nodes reply at times determined by the random function. And sequentially executing until no more unordered nodes join.
S3: after the first layer is formed, the master node has M online nodes, and token rotation (parent node needs to send sequenced logical node range to child nodes) is adopted according to the same process, and each online node is used as the master node to sequentially form and obtain the routing structures and ID files of the child nodes of the second layer … … and the third layer … … of each online node and sequence the corresponding logical nodes. After each layer of online child nodes obtain the ID file lists of the respective child nodes, the obtained routing structure, the ID file numbers of the child nodes and the corresponding logic node positioning serial numbers are reported to an upper layer father node in a routing table. And reporting layer by layer until the master node has 12-byte ID file numbers of all the subnodes of each layer and the related logical address numbers (1, … …, N).
If the ID profile lists of all the child nodes within the block can be established by manual input at the master node, the S2 and S3 processes are not required. The logical address of each child node is only valid in every networking.
S4: before the normal communication process, the main node firstly realizes the process of establishing the route, and the main node sequentially sends out COM5 command LoRa messages for all off-line nodes according to the stored ID files of the sub-nodes, wherein the messages comprise 12-byte ID file numbers of the related nodes and logic address numbers distributed to the messages when the messages are sent out. And when the child node receives the COM5 message, comparing the COM5 message with the ID serial number of the child node, if the COM5 message is consistent with the ID serial number of the child node, receiving pairing, and returning the COM2 message to an upper layer. After a round of COM5 is sent out, the main node takes the child nodes returning the COM2 messages as local online nodes of the main node. In this process, the primary node will form a local routing table and a secondary routing table structure.
S5: the process of S4 is then repeated in turn with the local online nodes acting as master nodes until a multi-tiered MESH routing network structure is established.
S6: after the MESH routing structure is built, the normal communication process is entered, in the normal communication process, the main node sends out a COM11 message to each sub-node according to the matched logical address, the message contains the content message information to be transferred, the message may only go through one layer (namely the local online node of the main node) or may cross a multi-layer routing structure (using the secondary routing table of each node) through an intermediate sub-node, after receiving the message, the intermediate sub-node forwards the message to the next layer according to the routing table structure, after receiving the message, the target sub-node packs the content message information to be replied to the main node into a COM12 message and returns to the previous layer, and uploads the COM12 message according to the routing surface layer until returning to the main node.
S7: in normal communication, once communication receives interference, the corresponding father node inquires again for three times, if no return exists in the three times, the father node is set to be offline and reported layer by layer, local routes are recombined, and global route recombination is not needed.
S8: if the off-line node exists in the system, if the source address for sending the query is the main node, sending a COM5 message containing the ID file number of the off-line node and the distribution logic address, and checking whether the off-line node can become a local on-line node or not. Otherwise, each layer of nodes sequentially contains the ID files of the offline nodes to be inquired and the matched logical addresses in the COM11 total report messages, if the related offline nodes receive the ID file numbers which are contained in the COM11 messages and are the same as the ID files of the related offline nodes, the COM2 messages are sent to the target addresses at the first time before the target address sub-nodes in the messages reply the COM12, and after the COM2 messages are received by the target sub-nodes, the offline nodes are immediately incorporated into the local online nodes of the nodes, and the local repair mechanisms of the offline nodes are formed by reporting the offline nodes along with the COM12 messages and routing.
S9: in the polling summation process of the main node, it often happens that some sub-nodes have urgent high-priority events and need to break the regular urgent constituent message submission, so that the conventional polling summation process at present must be terminated. For example, if there is an event that needs to be sent urgently by the child node K, the child node K forms a COM7 message (meanwhile, a cache backup is made), and sends the COM7 message immediately, the sending of the COM7 message will cause all the normal polling processes to be terminated immediately, if the COM7 cannot be terminated once, the COM7 message will be sent layer by layer until the wireless space is cleared, the master node receives the COM7 message, immediately organizes a return confirmation message after receiving the return confirmation message, and sends the return confirmation message to the node K layer by layer according to the route, and the node K clears the cache backup immediately after receiving the COM7, otherwise, if the child node K does not receive the confirmation message within a period of time, the cached emergency message will be retransmitted at intervals.
S10: in the normal total recruitment process, a situation that an emergency event of a large number of child nodes needs to be reported urgently due to power failure and the like also occurs, which cannot be realized by the process of S9. At this time, a convolution uploading mode is needed to actively upload all the child nodes which need to send emergency events to the main node in a batch mode in an orderly mode. The specific process is as follows: the COM7 message (with special mark for marking the event) is transmitted to the main node layer by layer as messenger message, after the main node receives the message, a frame COM8 message is transmitted to the minimum on-line logic address sub-node, after the node receives the message, if the node is a terminal node (leaf node), the COM9 message containing the event information is returned to the upper parent node of the main node, if the node is a middle node (branch node), the COM8 message is transmitted to the local on-line node of the lower layer, and so on, the process is repeated by each sub-node, after the sub-nodes collect the related information of each sub-node transmitted on the lower layer, the sub-nodes report layer by layer until the sub-nodes send to the main node. This process is called the convolution process. The main node collects the convolution information of one or more branches, so that time-consuming successive multi-layer respective polling summation can be avoided, and the information of a plurality of sub-nodes which simultaneously generate the emergency event can be collected neatly at the highest speed.
S11: in the process of receiving and transmitting the LoRa messages, each node monitors the LoRa messages in the space, and the messages are sent out at the idle moment in the air, so that possible mutual interference and uncontrollable events are avoided.
S12: the cell identification code is a special information contained in each frame message, and the adjacent cell can be set to different codes by the master node, so as to avoid wireless communication interference under the condition that the adjacent cell is set in the same frequency band (which is required to be combined with S11).
S13: the multi-type subnode equipment can share LoRa communication resources, equipment type layers are set in the main node, different types of equipment are endowed with corresponding type codes, each frame of message contains type information during communication, and the type information is uploaded by the subnode, so that the main node can perform corresponding processing according to the received type codes. The main node can form a plurality of processing subsystems in the main node according to the coding type information of the sub-nodes, for example, a plurality of sub-nodes belong to a leakage monitoring system, a plurality of sub-nodes belong to a three-phase unbalanced system and the like, each subsystem comprises different processing logics, and in the main node, the processing of the conventional node and each subsystem is switched by adopting tokens.
S14: for some special sub-nodes which do not participate in networking, a non-networking message receiving mechanism compatible with networking transmission is adopted, the protocol of the special sub-nodes needs to be analyzed necessarily, and once relevant messages are received, the special sub-nodes are treated as non-networking messages, taken into the main node and sent to the connected equipment framework.
S15: for the child nodes needing to store time information, a time synchronization mechanism is reserved, the main node receives time synchronization information sent by the connected equipment, a time synchronization command is sent to the child nodes of each layer at any time by using COM17 after the time synchronization information is updated and maintained in a self year, month, day, hour, minute and second clock system, and a confirmation message COM18 is sent to the main node after the child nodes receive the time synchronization command.
S16: when no LORA message is received and sent at ordinary times, the system automatically enters a network maintenance communication stage, a main node sends out polling short messages, traverses all layers of online sub-nodes, gives offline nodes to each polling message for checking, accesses any offline node which can be accessed at any time, eliminates any offline node out of the system, and performs local network recombination optimization.
Although the embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the embodiments disclosed.
Claims (10)
1. The utility model provides a MESH structure's LoRa networking method suitable for distribution station district which characterized in that: the method comprises the following steps:
s1: the method comprises the steps that a LoRa networking system comprising a main node and N sub-nodes is established, the main node is an information gathering point, and the sub-nodes are information acquisition points;
s2: when communication is achieved, the ID files of the sub-nodes in the system are collected firstly, the main node sequences after receiving the identification codes of the sub-nodes, the sequenced logic address sub-nodes do not reply any more, and the rest unordered sub-nodes reply according to the time determined by the random function and execute in sequence until no unordered node is added;
s3: after the first layer is formed, the main node has M online nodes, each online node is used as a main node by adopting a token rotation method, the lower-layer child nodes of each online node are sequentially formed and obtained, and each layer of online child nodes are sequentially reported to the upper-layer father node until the main node has 12-byte ID file numbers of all the layers of child nodes and related logical address numbers thereof;
s4: the main node firstly realizes the process of establishing the route, the main node sequentially sends out COM5 command LoRa messages for all off-line nodes according to the stored ID files of the sub-nodes, the sub-nodes compare with the ID serial numbers of the sub-nodes when receiving the COM5 messages, if the COM5 messages are consistent, the sub-nodes receive pairing and return the COM2 messages to the upper layer;
s5: then, taking local online nodes as main nodes to sequentially repeat the S4 process in turn until a multi-layer MESH routing network structure is established;
s6: after the MESH routing structure is built, the main node sends out COM11 message to each sub-node according to the matched logical address, the message contains the content message information to be transmitted, the intermediate sub-node forwards the message to the next layer according to the routing table structure after receiving the message, the target sub-node packs the content message information of the main node to be replied to the COM12 message to return to the upper layer node after receiving the message, and uploads the content message information to the main node according to the routing surface layer until returning to the main node.
2. The LoRa networking method of MESH networking architecture for power distribution substations according to claim 1, characterized in that: the main node is connected with N sub-nodes through a multi-layer routing structure, each sub-node is represented by a corresponding 12-byte unique ID which is used as a networking sub-node identification, and the ID is from a globally unique ID number of an MCU used for communication.
3. The LoRa networking method of MESH networking architecture for power distribution substations according to claim 1, characterized in that: the method for collecting the ID files of the child nodes in the system comprises the following steps: the main node with the logical node number of 0 sends out a broadcast number-seeking frame COM16, a sub-node group A set (i is 1 … a) receives the message, the sub-nodes are in a COM16 message receiving state in an unmatched state, the loop is performed once every 100ms, an interrupt callback function is used for receiving the LORA message, after the COM16 is received, a random time ts in 0-3 seconds is calculated by using a random function, different responding sub-nodes return to the main node after the ts time, other nodes to be accessed are in a monitoring state, and the message is delayed from being sent when the sub-nodes are found to be in the air.
4. The LoRa networking method of MESH networking architecture for power distribution substations according to claim 1, characterized in that: in S3, if the master node manually enters the ID file list for creating all the child nodes in the distribution area, the processes of S2 and S3 are not needed, and the logical address of each child node is valid only in each networking.
5. The LoRa networking method of MESH networking architecture for power distribution substations according to claim 1, characterized in that: in S4, the packet contains the 12-byte ID profile number of the relevant node and the logical address number assigned to the packet when it is sent out, after a round of COM5 is sent out, the main node takes the child nodes returning to the COM2 packet as its local online nodes, and the main node will form a local routing table and a secondary routing table structure.
6. The LoRa networking method of MESH networking architecture for power distribution substations according to claim 1, characterized in that: at S6, the packet goes through one level, i.e., local online nodes of the master node or across a multi-level routing structure via intermediate child nodes, i.e., using a secondary routing table for each node.
7. The LoRa networking method of MESH networking architecture for power distribution substations according to claim 1, characterized in that: if the source address for sending the query is the main node, sending a COM5 message containing an offline node ID file number and a distributed logic address, and checking whether the offline node can become a local online node, otherwise, each layer of nodes sequentially contains an offline node ID file to be queried and a matched logic address in each COM11 total report message, if the related offline node receives the ID file number which is contained in the COM11 message and is the same as the ID file number of the node, sending a COM2 message to a target address at the first time before a target address sub-node in the message replies COM12, and after receiving the COM2 message, immediately incorporating the offline node into the local online node of the node and routing along with the COM12 message by the target sub-node to form a local repair mechanism for reporting the offline node.
8. The LoRa networking method of MESH networking architecture for power distribution substations according to claim 1, characterized in that: in the process of receiving and transmitting the LoRa messages, each node monitors the LoRa messages in the space.
9. The LoRa networking method of MESH networking architecture for power distribution substations according to claim 1, characterized in that: the multi-type sub-node equipment shares LoRa communication resources, equipment type layers are set in the main node, equipment of different types are endowed with corresponding type codes, each frame of message contains type information during communication, and the type information is sent by the sub-nodes.
10. The LoRa networking method of MESH networking architecture for power distribution substations according to claim 1, characterized in that: when no LORA message is received and sent, the system automatically enters a network maintenance communication stage, a main node sends out polling short messages, all layers of online sub-nodes are traversed, offline nodes are given to each polling message for checking, any offline node which can be accessed is accessed at any time, any offline node is removed from the system, and local network recombination optimization is carried out.
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| CN108966305A (en) * | 2018-07-27 | 2018-12-07 | 深圳市荣盛智能装备有限公司 | A kind of LORA relaying ad hoc network method |
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| US20220038531A1 (en) * | 2019-04-18 | 2022-02-03 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Message transmission method and related devices |
| US11750697B2 (en) * | 2019-04-18 | 2023-09-05 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Message transmission method and related devices |
| EP4312388A1 (en) | 2022-07-26 | 2024-01-31 | Aiut Spolka Z Ograniczona Odpowiedzialnoscia | A method of transmitting data, a relay and end-device |
| CN115333608A (en) * | 2022-08-15 | 2022-11-11 | 重庆两江卫星移动通信有限公司 | Ground networking method and system for satellite Internet of things terminal |
| CN115866070A (en) * | 2023-01-28 | 2023-03-28 | 北京蓝色星际科技股份有限公司 | Data processing system and data processing method |
| CN115866070B (en) * | 2023-01-28 | 2023-05-02 | 北京蓝色星际科技股份有限公司 | Data processing system and data processing method |
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