CN114449612A - Dual-mode Mesh networking method for power Internet of things - Google Patents
Dual-mode Mesh networking method for power Internet of things Download PDFInfo
- Publication number
- CN114449612A CN114449612A CN202210125814.2A CN202210125814A CN114449612A CN 114449612 A CN114449612 A CN 114449612A CN 202210125814 A CN202210125814 A CN 202210125814A CN 114449612 A CN114449612 A CN 114449612A
- Authority
- CN
- China
- Prior art keywords
- node
- mwwp
- wired
- data
- wireless
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000006855 networking Effects 0.000 title claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 238000013507 mapping Methods 0.000 claims abstract description 18
- 238000011156 evaluation Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 12
- 238000005265 energy consumption Methods 0.000 claims description 8
- 238000009499 grossing Methods 0.000 claims description 7
- 238000005538 encapsulation Methods 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Images
Classifications
-
- 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
- H04W40/246—Connectivity information discovery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
-
- 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
-
- 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
- H04W84/22—Self-organising networks, e.g. ad-hoc networks or sensor networks with access to wired networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
Abstract
The invention relates to the technical field of power Internet of things, and particularly discloses a dual-mode Mesh networking method for the power Internet of things. And then, a mapping relation table from the wireless MAC address of the opposite-end MWWP node to a local wired port is constructed by customizing MWWP wired information frames on wired links among the MWWP nodes. After receiving data to be forwarded, the MWWP node firstly determines whether the data can be directly forwarded from the wired port according to the bridging table, if not, the data can be sent from the wired port according to the routing table and the mapping relation table, otherwise, the optimal forwarding path is selected to be sent from the wired port by calculating the evaluation quality value of each forwarding path, so that wired link forwarding data are selected according to the actual load condition of the network, and the transmission bandwidth and the transmission stability of the Mesh network in the power internet of things are improved.
Description
Technical Field
The invention relates to the technical field of power internet of things, in particular to a dual-mode Mesh networking method for the power internet of things.
Background
In recent years, with the development and integration of power systems and internet of things technologies, a credible power internet of things can be constructed by utilizing various communication resources such as a power communication network, a wired network and a wireless network of a public network operator, the internet and the like. Common wired access modes of the power internet of things include power line carrier communication, optical fiber communication and the like, and wireless access modes include a micro-power wireless technology, Bluetooth, Wi-Fi, ZigBee, UWB and the like. The transmission rate of optical fiber communication is high, but the defects of poor flexibility and high cost exist. The power line carrier communication does not need infrastructure construction and has wide network coverage, but because the electromagnetic interference of power distribution and utilization is serious, the communication quality is relatively poor due to larger channel attenuation. Currently, in the field of power internet of things, a simple wireless Mesh technology cannot meet actual requirements under the extremely severe conditions of large range, multiple users, high load and strong interference, and has the defects of poor compatibility, low transmission quality, weak interference resistance and the like. At the present stage, a wired network and a wireless network often exist in the power internet of things, and a single communication technology is difficult to meet the field requirements, so that the wired network is integrated into the existing Mesh network, and a wired link is used as a component of a Mesh network transmission path in the power internet of things, so that the aim of improving the overall transmission quality while maintaining the network stability is achieved.
In the existing wireless Mesh network protocol, a plurality of routers serving as wireless Access Points (APs) in a certain area are used as nodes, a network is established among the APs through wireless connection, and data exchange is carried out in the network based on the Mesh network protocol. In an actual application scenario, since the construction of the Mesh network still depends on wireless communication, the Mesh network is still restricted by factors such as channel environment and strong interference. The HWMP (hybrid wireless Mesh protocol) is a default routing protocol proposed by the ieee802.11s wireless Mesh standard, and integrates active and passive routing features, but the HWMP can only work in a wireless network environment. If the HWMP protocol can be improved, the wired network is fused into the existing wireless Mesh network environment, so that the wired link can be selected to forward data according to the actual load condition of the network, and the aims of improving the transmission bandwidth and the transmission stability of the Mesh network in the power internet of things are fulfilled.
Disclosure of Invention
The invention provides a dual-mode Mesh networking method for an electric power Internet of things, which solves the technical problems that: how to improve the HWMP protocol, and the wired network is fused into the current wireless Mesh network environment.
In order to solve the technical problems, the invention provides a dual-mode Mesh networking method for an electric power internet of things, which comprises the following steps:
s1, defining a plurality of Mesh wired and wireless system management nodes which are simultaneously connected with a wired Mesh network and a wireless Mesh network in the wireless Mesh network applying the HWMP protocol, namely MWWP nodes, wherein the MWWP nodes are connected through wired links;
s2, using Ethernet tunnel technique to package the protocol message, to make HWMP route protocol be transmitted in wire Mesh network;
s3, in the networking stage, each MWWP node exchanges the wired MAC address and the wireless MAC address of each other and the connected wired interface through the customized MWWP wired information frame on the wired link of each other, and a mapping relation table from the wireless MAC address of the opposite-end MWWP node to the local wired interface is constructed;
s4, the current MWWP node receives the data to be forwarded of a source data node, whether a bridging table entry points to the destination MAC address of a destination data node or not is checked, if yes, the data is forwarded out from the wired port according to the bridging table entry, and if not, the step S5 is executed;
s5, the current MWWP node checks whether the route table item in the route table of the current MWWP node points to the destination MAC address of the destination data node, if so, the data is forwarded out from the wired port according to the route table item and the mapping relation table, and if not, the step S6 is executed;
s6, starting a route discovery process by the current MWWP node, traversing a wireless interface and a wired interface, calculating the evaluation quality value of each forwarding path between the source data node and the destination data node, determining the optimal forwarding path according to the evaluation quality value, and then entering the step S7;
and S7, the current MWWP node updates the routing table and the bridging table according to the optimal forwarding path and forwards the data to the destination data node.
Further, after the processing in the step S1, a dual-mode Mesh network is obtained, in the dual-mode Mesh network topology, the MWWP nodes and the server are connected by wired Mesh networks, and the MWWP nodes and the Mesh wireless gateway, and the MWWP nodes and each data node are connected by wireless Mesh networks.
Further, in step S5, the specific process of the current MWWP node forwarding data from the wired port according to the routing table entry and the mapping relationship table is as follows:
after receiving the data to be forwarded, the current MWWP node inquires a routing table of the current MWWP node to obtain a wireless MAC address of a next hop node, inquires a mapping relation table to obtain a wired port of the next hop node, and then modifies a bridging table to forward the data from the wired port.
Further, in step S6, the estimated quality value PathMetric of each forwarding path is calculated using the following formula:
the formula (1) represents that the evaluation quality value PathMetric of the whole forwarding path is obtained by accumulating and summing all the Metric values passing through each hop on a link, N represents the nth hop, and N represents the total hop number;
calculating the Metric value between the nth hop, namely the node i and the node j by adopting the following formula:
wherein AT represents the average transmission delay between node i and node j, UijRepresenting the energy consumption value between node i and node j,
representing the link quality between node i and node j AT time k, with η, μ being parameter factors for adjusting AT, Uij、
The nodes here include MWWP nodes and data nodes, respectively.
Further, the average transmission delay AT between node i and node j, i.e. AT (k +1), is calculated using the following formula:
AT(k+1)＝θ*AT(k)+(1-θ)*RT (3)
the node b comprises a node i, a node j, a node RT, and a node RT, wherein RT — Ts — s represents the single transmission delay between the node i and the node j, Ts _ s represents the timestamp of the source data node when the source data node sends out a probe packet, Ts _ r represents the timestamp of the destination data node when the destination data node receives the probe packet, θ represents the smoothing coefficient, and AT (k +1) represents the average transmission delay between the node i and the node j AT the time k and the time k +1, respectively.
Further, the energy consumption value U between the node i and the node j is calculated and expressed by the following formulaij：
Wherein, BjLoad communication frequency, P, representing node jijRepresentative node i andenergy consumption of transmissions between nodes j, E0Representing the initial total energy, E, of node jjIndicating the remaining energy of node j at the current time.
Further, the link quality between node i and node j at time k is calculated using the following formula
Wherein m ∈ (0,1) represents a smoothing coefficient;
indicating the link quality at time k-1 for node i and node j,
indicating the number of packets received by node j from node i during time t,
indicating that node j lost the number of packets from node i during time t.
Further, the step S6 specifically includes the steps of:
s61, starting a route discovery process by the current MWWP node, and traversing the wireless interface and the wired interface to send a path request frame to a destination data node;
s62, the destination data node receives the path request frames from different paths in sequence, and selects the forwarding path with the minimum evaluation quality value as the optimal forwarding path to send the path reply frame to the current MWWP node by calculating the evaluation quality value of each forwarding path between the destination data node and the source data node so as to establish a return route to the source data node;
s63, after the current MWWP node receives the path reply frame, an item to the destination data node is established in the route table according to the optimal forwarding path and the step S7 is entered.
Further, in the interface traversal process of step S61, if the current interface is a wired interface, the path request frame is encapsulated in an ethernet frame by using a frame encapsulation technique and transmitted through the wired Mesh network; and if the current interface is a wireless interface, directly broadcasting and forwarding in the wireless Mesh network.
Further, in step S3, the MWWP wired information frame includes, from top to bottom, a custom frame header, a Type value, and a local wireless MAC address, where the custom frame header includes, from top to bottom, a preamble, a flag, a destination MAC address, a source MAC address, an 802.1Q tag, and an ethernet Type, and the Type value indicates the Type of the frame.
The invention provides a dual-mode Mesh networking method facing to an electric power Internet of things, which comprises the steps of firstly defining a new node MWWP node to be connected with a wired Mesh network and a wireless Mesh network simultaneously (step S1), and then using an Ethernet tunnel technology to carry out encapsulation operation on a protocol message, so that an HWMP routing protocol can be transmitted in the wired network, and a wired path to a target data node can be established through the wired Mesh network (step S2). And then constructing a mapping relation table of the wireless MAC address of the opposite MWWP node to the local wired port by customizing the MWWP wired information frame on the wired link between the MWWP nodes (step S3). After receiving the data to be forwarded, the MWWP node firstly determines whether the data can be directly forwarded from the wired port according to the bridging table (step S4), and if not, further determines whether the data can be directly forwarded from the wired port according to the routing table and the mapping relation table (step S5), if not, the MWWP node enters the final route discovery process, and selects the optimal forwarding path to be sent from the wired port by calculating the evaluation quality value of each forwarding path (steps S6 and S7), so that the improvement of the HWMP protocol is realized, the wired network is fused into the current wireless Mesh network environment, the wired link can be selected according to the actual load condition of the network to forward the data, and the transmission bandwidth and the transmission stability of the Mesh network in the power internet of things are improved.
Drawings
Fig. 1 is a flowchart of a dual-mode Mesh networking method for an electric power internet of things according to an embodiment of the present invention;
fig. 2 is a topological diagram of a dual-mode Mesh network facing to an electric power internet of things according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which are given solely for the purpose of illustration and are not to be construed as limitations of the invention, including the drawings which are incorporated herein by reference and for illustration only and are not to be construed as limitations of the invention, since many variations thereof are possible without departing from the spirit and scope of the invention.
In order to improve a HWMP protocol and merge a wired network into a current wireless Mesh network environment to improve transmission bandwidth and transmission stability of a Mesh network in an electric power internet of things, an embodiment of the present invention provides a dual-mode Mesh networking method for an electric power internet of things, as shown in fig. 1, including the steps of:
s1, defining a plurality of Mesh wired and wireless system management nodes which are simultaneously connected with the wired Mesh network and the wireless Mesh network in the wireless Mesh network applying the HWMP protocol, namely MWWP nodes, and connecting the MWWP nodes through wired links.
After the processing in the step S1, a dual-mode Mesh network may be obtained, in the dual-mode Mesh network topology, the MWWP nodes and the server are connected by wired Mesh networks, and the MWWP nodes and the Mesh wireless gateway, and the MWWP nodes and each data node are connected by wireless Mesh networks.
FIG. 2 shows a simplified topology structure of a dual-mode Mesh network, which includes 1 server, 2 MWWP nodes A and B, two Mesh wireless gateways C and D, and 3 data nodes m1、m2、m3Any data node can be used as a source node for sending data and a destination node for receiving data, in this case, node m1It is necessary to send data to node m through MWWP node A2The description is given by way of example.
And S2, encapsulating the protocol message by using the Ethernet tunneling technology so that the HWMP routing protocol can be transmitted in the wired Mesh network.
S3, in the networking stage, each MWWP node exchanges the wired MAC address and the wireless MAC address of each MWWP node and the connected wired interface through the customized MWWP wired information frame on the wired link of each MWWP node, and a mapping relation table from the wireless MAC address of the opposite end MWWP node to the local wired interface is constructed.
In this step S3, as shown in table 1, the MWWP wired information frame includes, from the beginning to the end, the custom frame header, the Type value, and the local wireless MAC address. As shown in table 2, the custom frame header includes a preamble, a flag bit, a destination MAC address, a source MAC address, an 802.1Q tag, and an ethernet type from beginning to end, and occupies 7, 1, 6, 4, and 2 bytes (bytes), respectively. The Type value indicates the Type of frame, such as a broadcast frame and a control frame. The local wireless MAC addresses are used to exchange wired and wireless MAC addresses with each other over a wired link.
TABLE 1
| Custom frame header | Type value | Wireless MAC |
TABLE 2
| 7byte | 1byte | 6byte | 6byte | 4byte | 2byte |
| Lead code | Marker bit | Destination MAC address | Source MAC address | 802.1Q tag | Ethernet type |
S4, the current MWWP node (MWWP node A) receives a source data node (node m)1) Checking whether a bridging table entry in a bridging table of the node m points to a target data node (node m)2) If so, forwarding the data out of the wired port according to the bridging table entry, otherwise, entering step S5.
It should be noted that the bridging table mainly contains path forwarding information between MWWP wired nodes. The MWMP nodes exchange custom information frames through wired connection, and periodic polling is carried out through an HWMP protocol to obtain a bridging table.
S5, the current MWWP node (MWWP node A) checks whether the routing table item in the routing table of the current MWWP node points to the destination data node (node m)2) If so, forwarding the data from the wired port according to the routing table entry and the mapping relation table, otherwise, entering step S6.
In step S5, the specific process of the current MWWP node (MWWP node a) forwarding data from the wired port according to the routing table entry and the mapping relationship table is as follows:
after receiving the data to be forwarded, the current MWWP node (MWWP node A) inquires a routing table of the current MWWP node to obtain a wireless MAC address of a next hop node, then inquires a mapping relation table to obtain a wired port of the next hop node, and then modifies a bridging table to forward the data from the wired port.
It should be noted that the routing table mainly contains the wireless link information of the current MWWP node. The routing table is mainly obtained by periodic polling through the HWMP protocol.
S6, starting the route discovery process of the current MWWP node (MWWP node A), traversing the wireless interface and the wired interface, and calculating the source data node (node m)1) To the destination data node (node m)2) And determining the optimal forwarding path according to the estimated quality value, and then proceeding to step S7.
Step S6 specifically includes the steps of:
s61, the current MWWP node (MWWP node A) starts the route discovery process, and the wireless interface and the wired interface are traversed to the target data node (node m)2) Transmitting a path request frame;
s62, destination data node (node m)2) Receiving the path request frames from different paths in sequence, and calculating to the source data node (node m)1) The forwarding path with the minimum evaluation quality value is selected as the optimal forwarding path to send a path reply frame to the current MWWP node (MWWP node A) so as to establish a path reply frame to the source data node (node m)1) The return route of (2);
s63, after the current MWWP node (MWWP node A) receives the path reply frame, a data node (node m) to the destination is established in the routing table according to the optimal forwarding path2) And proceeds to step S7.
In the interface traversal process of step S61, if the current interface is a wired interface, the path request frame is encapsulated in an ethernet frame by a frame encapsulation technique and transmitted through the wired Mesh network; and if the current interface is a wireless interface, directly broadcasting and forwarding in the wireless Mesh network.
In this step S62, the estimated quality value PathMetric of each forwarding path is calculated using the following formula:
the formula (1) represents that the evaluation quality value PathMetric of the whole forwarding path is obtained by accumulating and summing all the Metric values passing through each hop on a link, N represents the nth hop, and N represents the total hop number;
calculating the Metric value between the nth hop, namely the node i and the node j by adopting the following formula:
wherein AT represents the average transmission delay between node i and node j, UijRepresenting the energy consumption value between node i and node j,
representing the link quality between node i and node j AT time k, with η ═ 0.15 and μ ═ 0.4 being parameter factors for adjusting AT and Uij、
The nodes here include MWWP nodes and data nodes, respectively. Node A to node m in FIG. 22There are only 2 forwarding paths, path 1: a → C → D and Path 2: a → B → D.
Calculating the average transmission delay AT between the node i and the node j, namely AT (k +1), by adopting the following formula:
AT(k+1)＝θ*AT(k)+(1-θ)*RT (3)
the node I and the node J are connected with the Mesh node through the network, wherein RT-Ts-r-Ts-s represents single transmission time delay between the node I and the node j, Ts-s represents a time stamp when a source data node sends a detection packet, Ts-r represents a time stamp when a target data node receives the detection packet, and values of Ts-s and Ts-r are measured by the Mesh node periodically. Because single measurement has larger contingency and fluctuation, a smoothing coefficient theta is introduced, and the average transmission delay AT is adopted to replace the single transmission delay RT. The delay jitter can be eliminated through the smoothing coefficient theta, and the sudden change of the delay result caused by accidental blockage in the network is avoided. AT (k), AT (k +1) represent the average transmission delay between node i and node j AT time k and time k +1, respectively.
Calculating and expressing the energy consumption value U between the node i and the node j by adopting the following formulaij：
BjRepresenting the load communication frequency, P, of node jijRepresenting the energy consumption of the transmission between node i and node j, E0Representing the initial total energy, E, of node jjIndicating the remaining energy of node j at the current time.
Calculating the link quality between the node i and the node j at the moment k by adopting the following formula
Where m ∈ (0,1) represents a smoothing coefficient, and is generally 0.4.
Indicating the link quality at time k-1 for node i and node j,
indicating the number of packets received by node j from node i during time t,
indicating that node j lost the number of packets from node i during time t.
And through calculation, the Metric value between the nodes A and B is smaller than that between the nodes A and C, and the path 2 is an optimal forwarding path. The next hop in the table entry established in step S63 is the wireless MAC address of the node B, and the next hop is the wireless MAC address of the Mesh wireless gateway D.
And S7, the current MWWP node (MWWP node A) updates the routing table and the bridging table according to the optimal forwarding path and forwards the data to the target data node (MWWP node B).
In step S7, the MWWP node a updates the bridging table according to the routing table of the HWMP, and updates the destination address of the data to be forwarded and the wired ports of the nodes a to B into the new bridging table. At this time, the node A checks the bridging table, then the data is forwarded to the node B through the wired port from the node A to the node B, the node B receives the data and then forwards the data to the next hop, and finally the node m2Data is received.
In summary, according to the dual-mode Mesh networking method for the power internet of things provided by the present invention, a new node MWWP node is defined to simultaneously connect the wired Mesh network and the wireless Mesh network (step S1), and then an ethernet tunneling technique is used to perform an encapsulation operation on a protocol packet, so that the HWMP routing protocol can be transmitted in the wired network, and thus a wired path to a destination data node can be established through the wired Mesh network (step S2). And then constructing a mapping relation table of the wireless MAC address of the opposite MWWP node to the local wired port by customizing the MWWP wired information frame on the wired link between the MWWP nodes (step S3). After receiving the data to be forwarded, the MWWP node firstly determines whether the data can be directly forwarded from the wired port according to the bridging table (step S4), and if not, further determines whether the data can be directly forwarded from the wired port according to the routing table and the mapping relation table (step S5), if not, the MWWP node enters the final route discovery process, and selects the optimal forwarding path to be sent from the wired port by calculating the evaluation quality value of each forwarding path (steps S6 and S7), so that the improvement of the HWMP protocol is realized, the wired network is fused into the current wireless Mesh network environment, the wired link can be selected according to the actual load condition of the network to forward the data, and the transmission bandwidth and the transmission stability of the Mesh network in the power internet of things are improved.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A dual-mode Mesh networking method for an electric power Internet of things is characterized by comprising the following steps:
s1, defining a plurality of Mesh wired and wireless system management nodes which are simultaneously connected with a wired Mesh network and a wireless Mesh network in the wireless Mesh network applying the HWMP protocol, namely MWWP nodes, wherein the MWWP nodes are connected through wired links;
s2, using Ethernet tunnel technique to package the protocol message, to make HWMP route protocol be transmitted in wire Mesh network;
s3, in the networking stage, each MWWP node exchanges the wired MAC address and the wireless MAC address of each MWWP node and the connected wired interface through the customized MWWP wired information frame on the wired link of each MWWP node, and a mapping relation table from the wireless MAC address of the opposite end MWWP node to the local wired interface is constructed;
s4, the current MWWP node receives the data to be forwarded of a source data node, whether a bridging table entry points to the destination MAC address of a destination data node or not is checked, if yes, the data is forwarded out from the wired port according to the bridging table entry, and if not, the step S5 is executed;
s5, the current MWWP node checks whether the route table item in the route table of the current MWWP node points to the destination MAC address of the destination data node, if so, the data is forwarded out from the wired port according to the route table item and the mapping relation table, and if not, the step S6 is executed;
s6, starting a route discovery process by the current MWWP node, traversing a wireless interface and a wired interface, calculating the evaluation quality value of each forwarding path between the source data node and the destination data node, determining the optimal forwarding path according to the evaluation quality value, and then entering the step S7;
and S7, the current MWWP node updates the routing table and the bridging table according to the optimal forwarding path and forwards the data to the destination data node.
2. The dual-mode Mesh networking method for the power internet of things according to claim 1, wherein: and after the processing in the step S1, obtaining a dual-mode Mesh network, in the dual-mode Mesh network topology, the MWWP nodes and the server are connected by wired Mesh networks, and the MWWP nodes and the Mesh wireless gateway, and the MWWP nodes and each data node are connected by wireless Mesh networks.
3. The dual-mode Mesh networking method oriented to the power internet of things according to claim 2, wherein in step S5, the specific process of forwarding data from the wired port by the current MWWP node according to the routing table entry and the mapping relationship table is as follows:
after receiving the data to be forwarded, the current MWWP node inquires a routing table of the current MWWP node to obtain a wireless MAC address of a next hop node, inquires a mapping relation table to obtain a wired port of the next hop node, and then modifies a bridging table to forward the data from the wired port.
4. The electric power internet of things-oriented dual-mode Mesh networking method according to claim 3, wherein in step S6, the evaluation quality value PathMetric of each forwarding path is calculated by using the following formula:
the formula (1) represents that the evaluation quality value PathMetric of the whole forwarding path is obtained by accumulating and summing all the Metric values passing through each hop on a link, N represents the nth hop, and N represents the total hop number;
calculating the Metric value between the nth hop, namely the node i and the node j by adopting the following formula:
wherein AT represents the average transmission delay between node i and node j, UijRepresenting the energy consumption value between node i and node j,
representing the link quality between node i and node j AT time k, with η, μ being parameter factors for adjusting AT, Uij、
The nodes here include MWWP nodes and data nodes, respectively.
5. The dual-mode Mesh networking method oriented to the power internet of things according to claim 4, wherein the average transmission delay AT (AT +1) between the node i and the node j is calculated by adopting the following formula:
AT(k+1)＝θ*AT(k)+(1-θ)*RT (3)
the node b comprises a node i, a node j, a node RT, and a node RT, wherein RT — Ts — s represents the single transmission delay between the node i and the node j, Ts _ s represents the timestamp of the source data node when the source data node sends out a probe packet, Ts _ r represents the timestamp of the destination data node when the destination data node receives the probe packet, θ represents the smoothing coefficient, and AT (k +1) represents the average transmission delay between the node i and the node j AT the time k and the time k +1, respectively.
6. The dual-mode Mesh networking method oriented to the Internet of things of electric power according to claim 4, wherein the energy consumption value U between the node i and the node j is calculated and expressed by adopting the following formulaij：
Wherein, BjRepresenting the load communication frequency, P, of node jijRepresenting the energy consumption of the transmission between node i and node j, E0Representing the initial total energy, E, of node jjIndicating the remaining energy of node j at the current time.
7. The electric power Internet of things-oriented dual-mode Mesh networking method according to claim 4, characterized in that the following formula is adopted to calculate the k time between the node i and the node jLink quality of a slot
Wherein m ∈ (0,1) represents a smoothing coefficient;
indicating the link quality at time k-1 for node i and node j,
indicating the number of packets received by node j from node i during time t,
indicating that node j lost the number of packets from node i during time t.
8. The electric power internet of things-oriented dual-mode Mesh networking method according to any one of claims 2 to 7, wherein the step S6 specifically comprises the steps of:
s61, starting a route discovery process by the current MWWP node, and traversing the wireless interface and the wired interface to send a path request frame to a destination data node;
s62, the destination data node receives the path request frames from different paths in sequence, and selects the forwarding path with the minimum evaluation quality value as the optimal forwarding path to send the path reply frame to the current MWWP node by calculating the evaluation quality value of each forwarding path between the destination data node and the source data node so as to establish a return route to the source data node;
s63, after the current MWWP node receives the path reply frame, an item to the destination data node is established in the route table according to the optimal forwarding path and the step S7 is entered.
9. The method for networking a dual-mode Mesh oriented to the internet of things of electric power according to claim 8, wherein in the interface traversal process of step S61, if the current interface is a wired interface, the path request frame is encapsulated in an ethernet frame by a frame encapsulation technique and transmitted through the wired Mesh network; and if the current interface is a wireless interface, directly broadcasting and forwarding in the wireless Mesh network.
10. The dual-mode Mesh networking method for the power internet of things according to claim 1, wherein: in step S3, the MWWP wired information frame includes, from top to bottom, a custom frame header, a Type value, and a local wireless MAC address, where the custom frame header includes, from top to bottom, a preamble, a flag, a destination MAC address, a source MAC address, an 802.1Q tag, and an ethernet Type, and the Type value indicates the Type of the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210125814.2A CN114449612A (en) | 2022-02-10 | 2022-02-10 | Dual-mode Mesh networking method for power Internet of things |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210125814.2A CN114449612A (en) | 2022-02-10 | 2022-02-10 | Dual-mode Mesh networking method for power Internet of things |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114449612A true CN114449612A (en) | 2022-05-06 |
Family
ID=81372441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210125814.2A Pending CN114449612A (en) | 2022-02-10 | 2022-02-10 | Dual-mode Mesh networking method for power Internet of things |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114449612A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116419364A (en) * | 2023-06-09 | 2023-07-11 | 杭州粒合信息科技有限公司 | Wi-SUN network and extension method through wired virtual radio frequency transmission |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108401041A (en) * | 2018-03-20 | 2018-08-14 | 重庆邮电大学 | A kind of bimodulus heterogeneous network group-net communication method towards electric power information collection system |
| CN108900517A (en) * | 2018-07-10 | 2018-11-27 | 吉林大学 | A kind of Security routing defence method based on HWMP agreement |
-
2022
- 2022-02-10 CN CN202210125814.2A patent/CN114449612A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108401041A (en) * | 2018-03-20 | 2018-08-14 | 重庆邮电大学 | A kind of bimodulus heterogeneous network group-net communication method towards electric power information collection system |
| CN108900517A (en) * | 2018-07-10 | 2018-11-27 | 吉林大学 | A kind of Security routing defence method based on HWMP agreement |
Non-Patent Citations (2)
| Title |
|---|
| 熊峰: "WiFi Mesh融合网络组播传输优化的研究与实现", 中国优秀硕士学位论文全文数据库-信息科技辑, 15 June 2019 (2019-06-15), pages 2 - 3 * |
| 金冬成, 王珂, 冯琳函: "基于节点能耗的IEEE802.11s路径选择优化方法", 吉林大学学报(工学版), 15 February 2012 (2012-02-15), pages 3 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116419364A (en) * | 2023-06-09 | 2023-07-11 | 杭州粒合信息科技有限公司 | Wi-SUN network and extension method through wired virtual radio frequency transmission |
| CN116419364B (en) * | 2023-06-09 | 2023-08-29 | 杭州粒合信息科技有限公司 | Wi-SUN network and extension method through wired virtual radio frequency transmission |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107517488B (en) | Message processing method and device | |
| JP5276686B2 (en) | Wireless base station and packet transfer route optimization method | |
| CN102957589B (en) | Method, network node and system for service data transmission | |
| KR101055416B1 (en) | Routing path establishment method in wireless sensor network and apparatus for performing same | |
| JP2006319676A (en) | Frame transmitting method, topology acquiring method and radio communication system | |
| CN110891294A (en) | Wireless ad hoc network routing method and system based on service type | |
| CN101867920B (en) | Grading type wireless sensor networking method | |
| EP2117271B1 (en) | Base station device, base station management device and base station management system | |
| JP5252978B2 (en) | Route control method, communication system, and communication apparatus | |
| CN114449612A (en) | Dual-mode Mesh networking method for power Internet of things | |
| Miao et al. | Study on research challenges and optimization for internetworking of hybrid MANET and satellite networks | |
| JP4632805B2 (en) | Multi-path multi-hop wireless LAN system | |
| CN114710975A (en) | Multi-domain transport multi-transport network context identification | |
| Barz et al. | Extending OLSRv2 for tactical applications | |
| Liu et al. | Advanced Fast Recovery OLSR Protocol for UAV Swarms in the Presence of Topological Change | |
| US8982908B1 (en) | Extension of path reply message to encode multiple route information in a mesh network | |
| CN114338513A (en) | Wireless multi-hop routing quick decision-making method and system based on cross-layer information perception | |
| Wibowo et al. | The routing protocol efficiency of named data network | |
| CN110430088B (en) | Method for discovering neighbor nodes and automatically establishing connection in NDN (named data networking) | |
| Singh | Node-to-Node Approaching in Wireless Mesh Connectivity | |
| EP2432269B1 (en) | Method and system for optimum configuration of a mesh network considering traffic characteristics | |
| Akkad et al. | Available bandwidth guided on-demand distance vector protocol for FANETs | |
| US11206590B2 (en) | Method for realizing wireless network convergence | |
| Al-Hiti et al. | Comparative Analysis of Routing Protocols over WiMAX | |
| EP2439879A1 (en) | Method for collecting routing information in a network |
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 |