CN113543373A - Heterogeneous network of ad hoc network and other non-ad hoc networks and fusion exchange method of data - Google Patents
Heterogeneous network of ad hoc network and other non-ad hoc networks and fusion exchange method of data Download PDFInfo
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- CN113543373A CN113543373A CN202110845059.0A CN202110845059A CN113543373A CN 113543373 A CN113543373 A CN 113543373A CN 202110845059 A CN202110845059 A CN 202110845059A CN 113543373 A CN113543373 A CN 113543373A
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- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
Abstract
The invention discloses a heterogeneous network of ad hoc network and other non-ad hoc networks and a fusion exchange method of data, wherein the heterogeneous network comprises the following components: the self-organizing network and the star network are multilayer networks working on an IP network layer, nodes on the self-organizing network layer are peer-to-peer nodes, no central node exists in the whole network, a point-to-point network is arranged among the nodes on the star network layer, the central node and other fusion nodes form a star network through a first frequency band, the fusion nodes and the common nodes form a self-organizing network through a second frequency band, and the first frequency band and the second frequency band are different frequency bands; the method is to make a strategy for communicating a control frequency band II with a frequency band I. The invention is used for the communication equipment to simultaneously support the ad hoc network and other data communication networks to form a heterogeneous network, realizes data exchange by utilizing the heterogeneous network to merge the ad hoc network, and avoids the problem of network storm caused by loop formation.
Description
Technical Field
The invention relates to the technical field of data communication, in particular to a heterogeneous network of an ad hoc network and other non-ad hoc networks and a data fusion and exchange method.
Background
An ad hoc network is a dynamically networked multi-hop mobility peer-to-peer network consisting of a plurality of nodes. There is no strict control center node in the network, and each node is self-organized. When the nodes communicate with the nodes outside the coverage area, other nodes carry out multi-hop forwarding of data, and the topological structure of the network changes along with the movement of each node.
In the prior art, a method for performing data fusion exchange between nodes and a heterogeneous network formed by an ad hoc network and other non-ad hoc networks by simultaneously supporting the node forms of the ad hoc network and the non-ad hoc network forms of the network is not found.
Disclosure of Invention
The invention aims to provide a heterogeneous network of an ad hoc network and other non-ad hoc networks and a data fusion and exchange method, which are used for communication equipment to simultaneously support the ad hoc network and other data communication networks to form the heterogeneous network, realize the data exchange by utilizing the heterogeneous network fusion ad hoc network, and avoid the network storm problem caused by the formation of a loop.
In order to achieve the purpose, the invention provides the following scheme:
an ad hoc and other non-ad hoc heterogeneous network comprising: simultaneously supporting a fusion node of an ad hoc network and a star network and a common node only supporting the ad hoc network; the ad hoc network and the star network are multilayer networks working on an IP network layer; each node on the ad hoc network layer is a peer node, and the whole network has no central node; a point-to-point network is arranged among nodes on the star network layer, and a central node exists; the central node and other fusion nodes form a star network through a frequency band I, and the fusion nodes and common nodes form a self-organizing network through a frequency band II; the first frequency band and the second frequency band are any different frequency bands.
Optionally, the fusion node and the common node at least support one or more of terminal structure, size and weight, antenna form, number of antennas, transmission power, and technical parameters of selectable frequency channels.
Optionally, the fusion node and the common node are at least one or more of a ground node, an airborne node, a handheld node and a vehicle-mounted node; the wireless transmission channel between different nodes changes in real time as the nodes move.
A method for fusion exchange of heterogeneous network data of an ad hoc network and other non-ad hoc networks is applied to the heterogeneous networks of the ad hoc network and other non-ad hoc networks, and comprises the following steps:
the self-networking equipment and the star-shaped network equipment exchange service data externally through IP messages, an industrial control computer inside the fusion node is connected with the self-networking radio station equipment and the star-shaped network equipment through a network port, and data are routed, forwarded and relayed through an IP layer;
when the frequency band two ad hoc network is communicated with the fusion node, the industrial control computer of the fusion node can access the other side under the condition of cutting off the forwarding of the network data of the frequency band one, and the industrial control computer does not perform two-layer bridging on the two network cards at the moment without needing to forward the data through the frequency band one; when the frequency band two ad hoc network among the fusion nodes is interrupted, under the condition of cutting off the forwarding of the frequency band one network data, the industrial control computer of the fusion nodes cannot access the other side, at the moment, the data need to be forwarded through the frequency band one, a network loop cannot be formed, and the industrial control computer should perform two-layer bridging on the two network cards; for an industrial control computer, a special detection message is sent at a two-layer MAC layer, and a loop storm is avoided;
the method comprises the following steps of (1) customizing the inner core of a Linux operating system of an industrial control computer as the routing and switching of ad hoc network equipment are maintained in two layers, adding a special virtual network card, and bridging the virtual network card with a network card corresponding to the ad hoc network of two network segments; writing control software, sending special MAC detection frames at regular time, detecting among fusion nodes, controlling the MAC detection frames to be sent out only through an ad hoc network or a star network through a virtual network card, and avoiding misjudgment during working due to frequency band-one bridging; meanwhile, the virtual network card driving layer ensures that the sent destination MAC address is a special MAC address which does not exist in the whole network actually, the special MAC address is not matched with any node network card in the whole network, a network protocol stack of each node network card can directly discard the MAC detection frame, and meanwhile, a virtual network card application layer APP of the fusion node can recognize and receive the detection frame and perform recognition filtering.
Optionally, a Linux operating system is run on the industrial control computer, two physical network cards eth0 and eth1 are respectively and directly connected to a first frequency band device network card and a second frequency band device network card, virtual network card devices tapX and tabY are respectively bridged with eth0 and eth1, service data enters the operating system through a socket api, and is finally sent out from the physical network cards through a network protocol stack and the network card devices eth0 and eth 1; bridging in the operating system, wherein service data to and from the physical network card can also be processed by an application layer program APP through virtual network card equipment tapX and tapY; and by utilizing the virtual network card equipment, the application layer processing program APP receives and transmits a two-layer message passing through the physical network card, on the basis, the message is identified and edited, and meanwhile, the specific message is gated according to a routing strategy and forwarded through the application program APP, so that the functions of filtering and forwarding the message between the first frequency band network card and the second frequency band network card are realized.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the invention solves the problems that a loop can be formed after the self-organized network and the heterogeneous networks of other networks are converged and communicated, and a network storm is brought, and realizes the networking communication capability by simultaneously utilizing various networks of the self-organized network and other networks.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a heterogeneous network including an ad hoc network and other non-ad hoc networks according to an embodiment of the present invention;
FIG. 2 is a block diagram of a heterogeneous network including an ad hoc network and other non-ad hoc networks according to an embodiment of the present invention;
FIG. 3 is a second diagram illustrating the architecture of a heterogeneous network, such as an ad hoc network and other non-ad hoc networks, according to an embodiment of the present invention;
FIG. 4 is a diagram of a software architecture according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a heterogeneous network of an ad hoc network and other non-ad hoc networks and a data fusion and exchange method, which are used for communication equipment to simultaneously support the ad hoc network and other data communication networks to form the heterogeneous network, realize the data exchange by utilizing the heterogeneous network fusion ad hoc network, and avoid the network storm problem caused by the formation of a loop.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, an ad hoc network and other non-ad hoc heterogeneous networks provided by an embodiment of the present invention include: simultaneously supporting a fusion node of an ad hoc network and a star network and a common node only supporting the ad hoc network; the ad hoc network and the star network are multilayer networks working on an IP network layer; each node on the ad hoc network layer is a peer node, and the whole network has no central node; a point-to-point network is arranged among nodes on the star network layer, and a central node exists; the central node and other fusion nodes form a star network through a frequency band I, and the fusion nodes and common nodes form a self-organizing network through a frequency band II; the first frequency band and the second frequency band are any different frequency bands.
The support of each node of the heterogeneous network of the ad hoc network and other star networks is not limited to technical parameters such as a terminal structure, size, weight, antenna form, antenna quantity, transmitting power, selectable frequency channels and the like, and the node form can be a ground node, an airborne node, a handheld node and a vehicle-mounted node; the heterogeneous network has an ad hoc network and a star network at the same time; the wireless transmission channel between different nodes changes in real time as the nodes move.
The heterogeneous network of the ad hoc network and other networks is a multi-layer network operating on an IP network layer, and the following methods take the ad hoc network and the star network as examples.
As shown in fig. 2, the radio station with a single antenna represents an ad hoc network node only supporting a frequency band two, and the radio station with a dual antenna represents a fusion node simultaneously supporting an ad hoc network with a frequency band two and a star network with a frequency band one; only one IP link path is arranged between the ad hoc network nodes supporting the frequency band II; the fusion node has two IP link paths at the same time, one is a frequency band two ad hoc network connection, and the other is a frequency band one star network connection.
When the inter-frequency band two ad hoc network of the fusion node is unblocked, all the devices are in the same ad hoc network IP subnet; when the frequency band II is disconnected and only the frequency band I is unblocked, the common node equipment with single frequency point can be respectively split to form two independent ad hoc network subnets; the star network among the nodes of the converged network is kept connected. Because the two ad hoc network subnets are independent local area networks, the left ad hoc network device cannot directly access the right ad hoc network device, and the IP data packet needs to be forwarded through an IP channel corresponding to the star network of the converged network node.
The network is represented by two independent network cards of an industrial control computer, one is connected with a wireless ad hoc network, the other is connected with a star network, and the two network cards are respectively connected with two subnets. When the frequency band two ad hoc network is communicated with the frequency band one star network, all nodes in the network are in the same local area network, and the network card of the frequency band one is a same subnet redundant channel; when the frequency band two ad hoc network is interrupted, the network card of the frequency band one bridges two different subnets.
The ad hoc network device and the star network device exchange service data externally through IP messages. And an industrial control computer inside the fusion network node is connected with the ad hoc network radio station equipment and the star network equipment through a network port, and routes, forwards and relays data through an IP layer.
The routing and topology maintenance of the ad hoc network equipment work in the two layers of a TCP/IP network protocol stack, when the ad hoc networks are communicated, each radio station in the ad hoc network is functionally equivalent to a network switch, and therefore network peripherals externally connected with each node are in a local area network and can access each other. In the heterogeneous network of the ad hoc network and other networks, the central node and other two fusion nodes comprise ad hoc network connection, and also have star point-to-point connection from the central node to the two fusion nodes, and the fusion nodes have the capability of forming two or more layers of network paths besides the ad hoc network connection. Therefore, when the ad hoc networks are connected and the star network of the fusion node is also connected, if the star network forwards data from the network card of the ad hoc network with the second frequency band, a network loop is formed in the local area network. When the broadcast message appears in the network, the broadcast message not only causes message repetition due to the secondary forwarding of the star network, but also forms a broadcast storm due to the existence of a network loop in the local area network, so that network congestion is gradually caused, and the effective data throughput is sharply reduced until the network is unavailable. Therefore, the heterogeneous network of the ad hoc network and other networks is not simple to relay and forward data through the fusion node, and the main difficulty is to control the strategy of communicating the frequency band two with the frequency band one, so as to avoid forming a network loop. And the strategy of communicating the frequency band two with the frequency band one needs to be completed by developing a control logic on an industrial control computer of the fusion node.
As shown in fig. 3, for the fusion node, the industrial control computer included therein has one network card connected to the ad hoc network of the second frequency band, and one network card connected to the star network of the first frequency band. Three fusion nodes exist in the cooperative network and correspond to three industrial control computers. When the frequency band two ad hoc network is communicated with the fusion node, the industrial control computer of the fusion node can access the other side under the condition of cutting off the data forwarding of the frequency band one network. At this moment, data does not need to be forwarded through one frequency band, so that the industrial control computer does not perform two-layer bridging on the two network cards; when the frequency band two ad hoc network between the fusion nodes is interrupted, and the network data forwarding of the frequency band one is cut off, the industrial control computer of the fusion node cannot access the other side. At this time, it can be known that data needs to be forwarded through one frequency band, and a network loop cannot be formed, so that the industrial control computer needs two network cards to perform two-layer bridging.
By arranging monitoring software on the industrial control computer, whether the frequency band two ad hoc network can be communicated with the industrial control computer or not is detected, whether frequency band one bridging is established or not can be determined, network communication is guaranteed, and meanwhile, a loop is avoided. However, whether the detection can be performed through the ad hoc network to communicate with the industrial control computer cannot be performed through data communication of more than three layers of protocols, such as ping packets or IP messages. When the first frequency band is connected in a bridge mode, the IP data message can be communicated with all nodes through the bridge, and whether the network is communicated by the ad hoc network or the first frequency band bridge cannot be distinguished; meanwhile, in a wireless environment, due to relative movement of each node, topology changes constantly, an originally disconnected frequency band two ad hoc network can be recovered suddenly, and by utilizing a three-layer protocol, an IP message is used for detecting whether the IP message is communicated with an industrial control computer, so that a network loop is triggered due to message repetition, and a broadcast storm is formed. Therefore, it is necessary for the industrial control computer to transmit a special probe message at the two-layer MAC layer while avoiding a loop storm. The same maintenance of the routing and the switching of the ad hoc network equipment in the two layers is carried out, the inner core of the Linux operating system of the industrial control computer is customized, a special virtual network card is added, and the virtual network card is bridged with the network card corresponding to the two-network segment ad hoc network. Writing control software, sending a special MAC detection frame at regular time, detecting among three fusion nodes, and controlling the MAC detection frame to be sent out only through an ad hoc network or a star network through a virtual network card, so that misjudgment caused by bridging of a frequency band I is avoided; meanwhile, the virtual network card driving layer ensures that the sent destination MAC address is a special MAC address which does not exist in the whole network actually, and the special MAC address is not matched with any node network card in the whole network, so that the network protocol stack of each node network card can directly discard the MAC detection frame, and the virtual network card application layers APP of the three fusion nodes can recognize and receive the detection frame and perform recognition filtering, thereby ensuring that the network connection condition is recognized and avoiding network loop storms.
The embodiment of the invention also provides a method for fusion exchange of heterogeneous network data of the ad hoc network and other non-ad hoc networks, which is applied to the heterogeneous networks of the ad hoc network and other non-ad hoc networks and comprises the following steps:
the self-networking equipment and the star-shaped network equipment exchange service data externally through IP messages, an industrial control computer inside the fusion node is connected with the self-networking radio station equipment and the star-shaped network equipment through a network port, and data are routed, forwarded and relayed through an IP layer;
when the frequency band two ad hoc network is communicated with the fusion node, the industrial control computer of the fusion node can access the other side under the condition of cutting off the forwarding of the network data of the frequency band one, and the industrial control computer does not perform two-layer bridging on the two network cards at the moment without needing to forward the data through the frequency band one; when the frequency band two ad hoc network among the fusion nodes is interrupted, under the condition of cutting off the forwarding of the frequency band one network data, the industrial control computer of the fusion nodes cannot access the other side, at the moment, the data need to be forwarded through the frequency band one, a network loop cannot be formed, and the industrial control computer should perform two-layer bridging on the two network cards; for an industrial control computer, a special detection message is sent at a two-layer MAC layer, and a loop storm is avoided;
the method comprises the following steps of (1) customizing the inner core of a Linux operating system of an industrial control computer as the routing and switching of ad hoc network equipment are maintained in two layers, adding a special virtual network card, and bridging the virtual network card with a network card corresponding to the ad hoc network of two network segments; writing control software, sending special MAC detection frames at regular time, detecting among fusion nodes, controlling the MAC detection frames to be sent out only through an ad hoc network or a star network through a virtual network card, and avoiding misjudgment during working due to frequency band-one bridging; meanwhile, the virtual network card driving layer ensures that the sent destination MAC address is a special MAC address which does not exist in the whole network actually, the special MAC address is not matched with any node network card in the whole network, a network protocol stack of each node network card can directly discard the MAC detection frame, and meanwhile, a virtual network card application layer APP of the fusion node can recognize and receive the detection frame.
According to the heterogeneous network system structure of the ad hoc network and other networks, the fusion node simultaneously comprises a first frequency band network and a second frequency band network; in the device composition, an industrial control switch is respectively connected with a first frequency band device and a second frequency band device through network cards, a fusion node is responsible for data exchange and forwarding of a star network and an ad hoc network, a software architecture is shown in fig. 4, a Linux operating system is operated on an industrial control computer, two physical network cards eth0 and eth1 are respectively and directly connected with the first frequency band device and the second frequency band device, virtual network card devices tapX and tabY are respectively bridged with eth0 and eth1, service data enter the operating system through a socketAPI, and are finally sent out from the physical network cards through a network protocol stack, the network cards eth0 and the eth 1; bridging in the operating system, wherein service data to and from the physical network card can also be processed by an application layer program APP through virtual network card equipment tapX and tapY; and by utilizing the virtual network card equipment, the application layer processing program APP receives and transmits a two-layer message passing through the physical network card, on the basis, the message is identified and edited, and meanwhile, the specific message is gated according to a routing strategy and forwarded through the application program APP, so that the functions of filtering and forwarding the message between the first frequency band network card and the second frequency band network card are realized.
As can be seen from the above description of the software architecture, the industrial control computer of the fusion node can perform switching, filtering, and even editing of the messages based on the two-layer messages. By using the mechanism, for the message transmitted and received through the frequency band I, the source address field and the destination address field are added at the head of the second layer and respectively correspond to the three fusion node devices. After the application program APP identifies the data from the frequency band I, when the data needs to be forwarded to the frequency band II, the added source address and destination address fields are stripped off, and then the data is forwarded to the physical network card.
The application program APP can identify data between any two of the three fusion nodes, and independent logic bridging between the central node and the two fusion nodes can be achieved through filtering and forwarding strategies. Namely, the central node can bridge frequency band one data among the fusion nodes 1 and cut off a frequency band one channel between the central node and the fusion node 2; or all frequency bands between the central node and the fusion node are switched off and on by one channel.
The invention solves the problems that a loop can be formed after the self-organized network and the heterogeneous networks of other networks are converged and communicated, and a network storm is brought, and realizes the networking communication capability by simultaneously utilizing various networks of the self-organized network and other networks.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (5)
1. An ad-hoc and other non-ad-hoc heterogeneous network comprising: simultaneously supporting a fusion node of an ad hoc network and a star network and a common node only supporting the ad hoc network; the ad hoc network and the star network are multilayer networks working on an IP network layer; each node on the ad hoc network layer is a peer node, and the whole network has no central node; a point-to-point network is arranged among nodes on the star network layer, and a central node exists; the central node and other fusion nodes form a star network through a frequency band I, and the fusion nodes and common nodes form a self-organizing network through a frequency band II; the first frequency band and the second frequency band are any different frequency bands.
2. The ad-hoc and other non-ad-hoc heterogeneous networks according to claim 1 wherein said convergence nodes and common nodes support at least one or more of terminal structure, size weight, antenna form, number of antennas, transmit power, technical parameters of selectable frequency channels.
3. The ad-hoc network and other non-ad-hoc heterogeneous networks according to claim 1, wherein the fusion node and the common node are in the form of at least one or more of a ground node, an airborne node, a handheld node, and a vehicle-mounted node; the wireless transmission channel between different nodes changes in real time as the nodes move.
4. A method for converged switching of heterogeneous network data of an ad hoc network and other non-ad hoc networks, which is applied to the ad hoc network and other non-ad hoc networks described in claims 1 to 3, the method comprising:
the self-networking equipment and the star-shaped network equipment exchange service data externally through IP messages, an industrial control computer inside the fusion node is connected with the self-networking radio station equipment and the star-shaped network equipment through a network port, and data are routed, forwarded and relayed through an IP layer;
when the frequency band two ad hoc network is communicated with the fusion node, the industrial control computer of the fusion node can access the other side under the condition of cutting off the forwarding of the network data of the frequency band one, and the industrial control computer does not perform two-layer bridging on the two network cards at the moment without needing to forward the data through the frequency band one; when the frequency band two ad hoc network among the fusion nodes is interrupted, under the condition of cutting off the forwarding of the frequency band one network data, the industrial control computer of the fusion nodes cannot access the other side, at the moment, the data need to be forwarded through the frequency band one, a network loop cannot be formed, and the industrial control computer should perform two-layer bridging on the two network cards; for an industrial control computer, a special detection message is sent at a two-layer MAC layer, and a loop storm is avoided;
the method comprises the following steps of (1) customizing the inner core of a Linux operating system of an industrial control computer as the routing and switching of ad hoc network equipment are maintained in two layers, adding a special virtual network card, and bridging the virtual network card with a network card corresponding to the ad hoc network of two network segments; writing control software, sending special MAC detection frames at regular time, detecting among fusion nodes, controlling the MAC detection frames to be sent out only through an ad hoc network or a star network through a virtual network card, and avoiding misjudgment during working due to frequency band-one bridging; meanwhile, the virtual network card driving layer ensures that the sent destination MAC address is a special MAC address which does not exist in the whole network actually, the special MAC address is not matched with any node network card in the whole network, a network protocol stack of each node network card can directly discard the MAC detection frame, and meanwhile, a virtual network card application layer APP of the fusion node can recognize and receive the detection frame and perform recognition filtering.
5. The method for fusion exchange of the ad hoc network and other non-ad hoc network heterogeneous network data according to claim 4, wherein a Linux operating system is run on the industrial control computer, two physical network cards eth0, eth1 are respectively connected directly to a first frequency band device network card and a second frequency band device network card, virtual network card devices tapX, tabY are respectively bridged with eth0, eth1, service data enter the operating system through socketAPI, and are finally sent out from the network cards through a network protocol stack, the network card devices eth0, eth 1; bridging in the operating system, wherein service data to and from the physical network card can also be processed by an application layer program APP through virtual network card equipment tapX and tapY; and by utilizing the virtual network card equipment, the application layer processing program APP receives and transmits a two-layer message passing through the physical network card, on the basis, the message is identified and edited, and meanwhile, the specific message is gated according to a routing strategy and forwarded through the application program APP, so that the functions of filtering and forwarding the message between the first frequency band network card and the second frequency band network card are realized.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112822690A (en) * | 2021-03-15 | 2021-05-18 | 广西电网有限责任公司柳州供电局 | Star network multi-center node merging method |
| CN113795021A (en) * | 2021-10-29 | 2021-12-14 | 山东嘉航电子信息技术有限公司 | Dual-frequency heterogeneous ad hoc network data chain |
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2021
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112822690A (en) * | 2021-03-15 | 2021-05-18 | 广西电网有限责任公司柳州供电局 | Star network multi-center node merging method |
| CN113795021A (en) * | 2021-10-29 | 2021-12-14 | 山东嘉航电子信息技术有限公司 | Dual-frequency heterogeneous ad hoc network data chain |
| CN113795021B (en) * | 2021-10-29 | 2024-03-15 | 山东嘉航电子信息技术有限公司 | Dual-frequency heterogeneous ad hoc network data link |
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Application publication date: 20211022 |