CN112243009B - IPv 6-based industrial heterogeneous network multi-protocol convergence networking and communication system and method - Google Patents
IPv 6-based industrial heterogeneous network multi-protocol convergence networking and communication system and method Download PDFInfo
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Abstract
The invention relates to an IPv 6-based industrial heterogeneous network multi-protocol convergence networking and communication system and method, and belongs to the technical field of industrial networks. The system comprises a backbone network, an industrial field network and a heterogeneous protocol conversion device; the backbone network comprises an IPv6 switch; the industrial field network comprises a controller, I/O equipment and switching equipment; after the heterogeneous protocol conversion device is networked in an industrial field network, the controller and the I/O equipment in the industrial heterogeneous network are subjected to cross-network equipment association and cross-network communication with a backbone network through the heterogeneous protocol conversion device; the cross-network equipment association and cross-network communication comprise multi-protocol identification, cross-network equipment self-adaptive association networking and cross-network data flow identification and communication. The invention realizes the multi-protocol self-adaptive fusion networking and communication of the industrial heterogeneous network through the IPv6 technology and the heterogeneous protocol conversion device under the condition of not changing equipment and protocols in each industrial field network.
Description
Technical Field
The invention belongs to the technical field of industrial networks, and relates to an IPv 6-based industrial heterogeneous network multi-protocol self-adaptive fusion networking and communication system and method.
Background
With the rapid development of industrial networks, due to the limitation of factors such as the transmission rate and the deployment scenario of a single industrial network, the deployment of a single industrial network in a factory often cannot meet the requirement of data transmission. Industrial heterogeneous networks consisting of industrial networks of different protocol types can work together with complementary advantages, so that industrial heterogeneous networks are widely present in factories to meet data communication requirements. However, due to protocol differences, networking communication between different network devices is difficult. How to implement convergence networking and data communication of the industrial heterogeneous network becomes a challenge for industrial network development.
In the communication between the existing industrial heterogeneous networks, a protocol conversion device is commonly used for directly converting data of a network A into data of a network B and then sending the data to the network B.
IPv6(Internet Protocol Version 6) is a core Protocol of the next generation Internet, and has the advantages of a large address space, suitability for high-density networks, and the like. With the rapid development of the industrial internet, the IPv6 protocol gradually extends from the internet field to the industrial network field. In a factory backbone network, the deployment and application of the IPv6 are increasingly widespread.
Therefore, the present invention is a method for implementing cross-network adaptive networking and data communication between devices in an industrial heterogeneous network environment without changing devices and protocols in each industrial field network.
Disclosure of Invention
In view of the above, the present invention provides an IPv 6-based system and method for industrial heterogeneous network multiprotocol adaptive convergence networking and communication, which perform protocol conversion between an industrial field network and an IPv6 backbone network through a heterogeneous protocol conversion device, so as to complete functions of industrial network multiprotocol identification, cross-network device adaptive association networking, cross-network data stream identification and communication, and the like.
In order to achieve the purpose, the invention provides the following technical scheme:
an IPv 6-based industrial heterogeneous network multi-protocol fusion networking and communication system comprises a backbone network, an industrial field network and a heterogeneous protocol conversion device. Wherein, the backbone network comprises an IPv6 switch; the industrial field network comprises a controller, I/O equipment and switching equipment; after the heterogeneous protocol conversion device is networked in an industrial field network, the controller and the I/O equipment in the industrial heterogeneous network are subjected to cross-network equipment association and cross-network communication with a backbone network through the heterogeneous protocol conversion device; the cross-network equipment association and the cross-network communication comprise multi-protocol identification, self-adaptive fusion networking and data stream identification.
Further, cross-network device association among the industrial field network devices specifically includes the following steps:
s1: networking in an industrial field network, and accessing a heterogeneous protocol conversion device in the industrial field network;
s2: the method comprises the steps that a controller of an industrial field network I determines I/O equipment of an industrial field network j for cross-network equipment association, and the controller encapsulates and sends an association request frame by using an IPv4 protocol;
s3: the switching equipment of the industrial field network I receives the controller data, analyzes whether the IPv4 address of the controller data belongs to the home network or not, forwards the data to the home network I/O equipment if the data belongs to the IPv4 address of the home network, and forwards the data to a heterogeneous protocol conversion device in the industrial field network I if the data does not belong to the IPv4 address of the home network;
s4: the heterogeneous protocol conversion device in the industrial field network i receives the association request frame, fills the type of the network protocol and the flow identification into the head of IPv6, converts the IPv4 head of the association request frame into the head of IPv6, and sends the IPv6 association request frame to the backbone network;
s5: after receiving the IPv6 association request frame, the backbone network sends the IPv6 association request frame to a heterogeneous protocol conversion device in the industrial field network j;
s6: the heterogeneous protocol conversion device in the industrial field network j receives the IPv6 association request frame, identifies the protocol type of the industrial field network i through the IPv6 head, converts the IPv6 head into the IPv4 head, performs application layer protocol conversion on the association request frame, converts the application layer load of the industrial field network i into the application layer load of the local network, and converts the received IPv6 association request frame into the IPv4 association request frame of the local network;
s7: a heterogeneous protocol conversion device in the industrial field network j sends an IPv4 association request frame to local network switching equipment, and the switching equipment sends an IPv4 association request frame to local network I/O equipment;
s8: and after receiving the association request frame, the I/O equipment of the industrial field network j sends an association response frame to return to the controller of the industrial field network I through a series of operations of the original path, so that cross-network equipment association and self-adaptive fusion networking are completed.
Further, after cross-network device association is carried out between a controller of the industrial field network I and I/O devices of the industrial field network j, cross-network communication is carried out on industrial heterogeneous network devices; a controller of an industrial field network I sends a management frame to a heterogeneous protocol conversion device through an exchange device, the heterogeneous protocol conversion device carries out protocol type filling and flow identification conversion on the management frame and then reaches a backbone network, the backbone network forwards the management frame to the heterogeneous protocol conversion device in the industrial field network j, the management frame is operated to the exchange device of the industrial field network j through protocol identification, flow identification conversion, application layer protocol conversion and the like, then the exchange device forwards the management frame to an I/O device of the industrial field network j, and finally the I/O device returns a management response frame to the controller in the industrial field network I; after the controller of the industrial field network I issues the management frame of the I/O device of the industrial field network j, the I/O device of the industrial field network j can send periodic process data and aperiodic alarm data to the controller of the industrial field network I; so far, the controller of the industrial field network I and the I/O device of the industrial field network j realize cross-network device communication.
Further, the heterogeneous protocol conversion device fills the type of the industrial field network protocol into the head of the IPv6, so that multi-protocol self-adaptive identification is realized; the heterogeneous protocol conversion device identifies the industrial field network protocol Type by 6 bits in 20 bits of an IPv6 header flow label, 6 binary digits 2 can be converted into 10 binary digits 0-63 and represents 64 industrial field network protocol types, wherein the 10 binary digits 1-20 represent industrial field network protocol types of types 1-Type20 in IEC 61158 standard, and the rest industrial field network types are represented by the rest 10 binary digits.
Further, a heterogeneous protocol conversion device in the industrial field network i converts the local network data flow identifier in the IPv4 data packet into an IPv6 flow identifier, and fills the IPv 3683 flow identifier into the middle-low 14 bits of the IPv6 head flow label; a heterogeneous protocol conversion device in the industrial field network j analyzes the IPv6 flow identifier and converts the IPv6 flow identifier into a data flow identifier of the local network; the heterogeneous protocol conversion devices in the industrial field networks i and j determine the data flow by utilizing the triples of < the data flow identifier of the industrial field network i, the IPv6 flow identifier and the data flow identifier of the industrial field network j > and maintain the triple mapping relation table.
The invention has the beneficial effects that:
1) the invention applies the heterogeneous protocol conversion device to the communication between the industrial field network and the IPv6 backbone network, and realizes the heterogeneous network multi-protocol self-adaptive fusion networking and communication through the protocol conversion between the industrial field network and the IPv 6.
2) The invention utilizes the corresponding bit of the IPv6 head flow label domain to indicate the type of the industrial field network protocol, and the industrial field network at the data receiver analyzes the protocol type of the data sender, thereby solving the problem of protocol self-adaptive identification of the industrial heterogeneous network protocol conversion.
3) According to the invention, through the heterogeneous protocol conversion device, under the condition that the equipment and the protocol of each industrial field network are not changed, cross-network converged communication can be carried out between industrial heterogeneous network equipment as data are received and sent in the local network.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
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For a better understanding of the objects, aspects and advantages of the present invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a structural diagram of an IPv 6-based industrial heterogeneous network multi-protocol adaptive convergence networking and communication system;
FIG. 2 is a flow diagram of cross-network device association and communication in accordance with the present invention;
FIG. 3 is a design diagram of an IPv6 header flow label in the present invention;
fig. 4 is a flow chart of IPv6 header flow label padding and parsing in the present invention.
Detailed Description
The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Referring to fig. 1 to 4, fig. 1 is a structural diagram of an IPv 6-based industrial heterogeneous network multi-protocol adaptive convergence networking and communication system, including a backbone network, an industrial field network, and a heterogeneous protocol conversion device. The backbone network includes IPv6 switches. The industrial field network includes a controller, an I/O device, and a switching device. After the heterogeneous protocol conversion device is networked in the industrial field network, the industrial field network equipment is associated with a backbone network through the heterogeneous protocol conversion device and is in cross-network equipment association and cross-network communication. Cross-network equipment association and cross-network communication relate to multi-protocol identification, self-adaptive fusion networking and data stream identification.
The cross-network device association and communication process includes the steps of entering a network by a heterogeneous protocol conversion device, sending a heterogeneous device association request frame, filling an IPv6 header, returning a protocol identification and application layer load conversion and device association response frame, and performing cross-network communication, as shown in fig. 2. The specific process is as follows:
s101: networking in an industrial field network, and accessing a heterogeneous protocol conversion device in the industrial field network;
s102: the controller of the industrial field network 1 determines the I/O equipment of the industrial field network 2 for cross-network equipment association, and the controller encapsulates and sends an association request frame by using an IPv4 protocol;
s103: the switching equipment of the industrial field network 1 receives the controller data, analyzes whether the IPv4 address of the controller data belongs to the local network, forwards the controller data to the local network I/O equipment if the controller data belongs to the local network IPv4 address, and forwards the controller data to the heterogeneous protocol conversion device in the industrial field network 1 if the controller data does not belong to the local network IPv4 address;
s104: the heterogeneous protocol conversion device in the industrial field network 1 receives the association request frame, fills the type of the network protocol and the flow identifier into an IPv6 header, converts an IPv4 header of the association request frame into an IPv6 header, and sends the IPv6 association request frame to a backbone network;
s105: after receiving the IPv6 association request frame, the backbone network sends an IPv6 association request frame to a heterogeneous protocol conversion device in the industrial field network 2;
s106: a heterogeneous protocol conversion device in the industrial field network 2 receives an IPv6 association request frame, identifies the protocol type of the industrial field network 1 through an IPv6 head, converts the IPv6 head into an IPv4 head, performs application layer protocol conversion on the association request frame, converts the application layer load of the industrial field network 1 into the application layer load of the network, and converts the received IPv6 association request frame into an IPv4 association request frame of the network;
s107: a heterogeneous protocol conversion device in the industrial field network 2 sends an IPv4 association request frame to local network switching equipment, and the switching equipment sends an IPv4 association request frame to local network I/O equipment;
s108: after receiving the association request frame, the I/O device of the industrial field network 2 sends an association response frame to return to the controller of the industrial field network 1 through a series of operations on the original path, so that cross-network device association and adaptive fusion networking are completed.
Fig. 3 is a design diagram of an IPv6 header flow label, where a heterogeneous protocol conversion device fills an industrial field network protocol type into an IPv6 header to implement multi-protocol adaptive identification; the heterogeneous protocol conversion device identifies the industrial field network protocol Type by 6 bits in 20 bits of an IPv6 header flow label, 6 binary digits 2 can be converted into 10 binary digits 0-63 and represents 64 industrial field network protocol types, wherein the 10 binary digits 1-20 represent industrial field network protocol types of types 1-Type20 in IEC 61158 standard, and the rest industrial field network types are represented by the rest 10 binary digits. The heterogeneous protocol conversion device uses the middle-low 14 bits of the IPv6 header flow label for the data flow identification.
Fig. 4 is a flow chart of IPv6 header flow label padding and parsing. The process mainly comprises the filling of the IPv6 header by the heterogeneous protocol conversion device in the industrial field network 1 and the analysis of the IPv6 header by the heterogeneous protocol conversion device in the industrial field network 2, and the specific process is as follows:
s201: the industrial field network 1 sends IPv4 data to the heterogeneous protocol conversion device;
s202: a heterogeneous protocol conversion device in the industrial field network 1 converts the local network data flow identifier in the IPv4 data packet into an IPv6 flow identifier, fills the medium-low 14 bits of the IPv6 head flow label, and identifies the industrial field network protocol type by the medium-high 6 bits in 20 bits of the IPv6 head flow label;
s203: the heterogeneous protocol conversion device in the industrial field network 1 sends IPv6 data to the heterogeneous protocol conversion device in the industrial field network 2 through a backbone network;
s204: the heterogeneous protocol conversion device in the industrial field network 2 analyzes the IPv6 flow identifier, converts the flow identifier into a data flow identifier of the local network, analyzes the industrial field network protocol type, and sends IPv4 data to the local network I/O equipment;
s205: the heterogeneous protocol conversion device in the industrial field network 1 and 2 determines the data stream by using < data stream identifier of the industrial field network 1, IPv6 stream identifier, data stream identifier of the industrial field network 2 > triple, and maintains the triple mapping relation table.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (4)
1. An IPv 6-based industrial heterogeneous network multi-protocol convergence networking and communication system is characterized by comprising a backbone network, an industrial field network and a heterogeneous protocol conversion device; the backbone network comprises an IPv6 switch; the industrial field network comprises a controller, I/O equipment and switching equipment; after the heterogeneous protocol conversion device is networked in an industrial field network, the controller and the I/O equipment in the industrial heterogeneous network are subjected to cross-network equipment association and cross-network communication with a backbone network through the heterogeneous protocol conversion device; the cross-network equipment association and the cross-network communication comprise multi-protocol identification, self-adaptive fusion networking and data stream identification;
the cross-network device association among the industrial field network devices specifically comprises the following steps:
s1: networking in an industrial field network, and accessing a heterogeneous protocol conversion device in the industrial field network;
s2: industrial field networkiThe controller determines an industrial field network for cross-network device associationjThe controller encapsulates and sends the association request frame using the IPv4 protocol;
s3: industrial field networkiThe switching equipment receives the controller data, analyzes whether the IPv4 address of the controller data belongs to the home network or not, forwards the IPv4 address belonging to the home network to the I/O equipment of the home network if the IPv4 address belongs to the home network, and forwards the IPv4 address not belonging to the home network to the industrial field networkiThe heterogeneous protocol conversion device in (1);
s4: industrial field networkiThe heterogeneous protocol conversion device in the system receives the association request frame, fills the type of the network protocol and the flow identification into an IPv6 head, converts the IPv4 head of the association request frame into an IPv6 head, and sends the IPv6 association request frame to a backbone network;
s5: after receiving the IPv6 association request frame, the backbone network sends an IPv6 association request frame to the industrial field networkjThe heterogeneous protocol conversion device in (1);
s6: industrial field networkjThe heterogeneous protocol conversion device in the system receives the IPv6 association request frame and identifies the industrial field network through the IPv6 headeriConverting IPv6 header into IPv4 header, performing application layer protocol conversion on the association request frame, and converting the industrial field networkiThe heterogeneous protocol conversion device converts the received IPv6 association request frame into an IPv4 association request frame of the network;
s7: industrial field networkjThe heterogeneous protocol conversion device in the system sends an IPv4 association request frame to local network switching equipment, and the switching equipment sends an IPv4 association request frame to local network I/O equipment;
s8: industrial field networkjAfter receiving the association request frame, the I/O device sends an association response frame to perform a series of operations through the original pathReturn to industrial field networkiThe controller of (1) so far, cross-network device association and self-adaptive fusion networking are completed.
2. The industrial heterogeneous network multi-protocol convergence networking and communication system of claim 1, wherein the industrial field network is configured to be used in a field environmentiController and industrial field networkjAfter the I/O equipment performs cross-network equipment association, the industrial heterogeneous network equipment performs cross-network communication; industrial field networkiThe controller sends the management frame to the heterogeneous protocol conversion device through the exchange equipment, the heterogeneous protocol conversion device carries out protocol type filling and flow identification conversion on the management frame and then reaches the backbone network, and the backbone network forwards the management frame to the industrial field networkjThe heterogeneous protocol conversion device is converted into an industrial field network through protocol identification, flow identification conversion and application layer protocol conversionjAnd the switching device forwards to the industrial field networkjAnd finally the I/O device returns a management response frame to the industrial field networkiThe controller of (1); through an industrial field networkiController to industrial field networkjAfter the management frame of the I/O device is issued, the industrial field networkjThe I/O device transmits periodic process data and aperiodic alarm data to the industrial field networkiThe controller of (1); to this end, industrial field networksiController and industrial field networkjThe I/O devices of (a) enable cross-network device communication.
3. The industrial heterogeneous network multi-protocol convergence networking and communication system as claimed in claim 1, wherein the heterogeneous protocol conversion device fills the industrial field network protocol type into the IPv6 header to implement multi-protocol adaptive identification; the heterogeneous protocol conversion device identifies the industrial field network protocol Type by 6 bits in 20 bits of an IPv6 head flow label, converts 6 2-system bits into 10-system numbers 0-63 and represents 64 industrial field network protocol types, wherein the 10-system numbers 1-20 represent industrial field network protocol types 1-Type20 in the IEC 61158 standard, and the rest industrial field network types are represented by the rest 10-system numbers.
4. The industrial heterogeneous network multi-protocol convergence networking and communication system of claim 3, wherein the industrial field networkiThe heterogeneous protocol conversion device converts the local network data flow identifier in the IPv4 data packet into an IPv6 flow identifier, and fills the medium-low 14 bits of the IPv6 head flow label; industrial field networkjThe heterogeneous protocol conversion device in the network analyzes the IPv6 flow identifier and converts the IPv6 flow identifier into the data flow identifier of the network; industrial field networkiAndjheterogeneous protocol conversion device utilization in (1)<Industrial field networkiData flow identification, IPv6 flow identification, industrial field networkjData stream identification>The triples determine the data flow and maintain a triple mapping table.
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| CN113242248B (en) * | 2021-05-10 | 2022-03-25 | 重庆邮电大学 | High-speed protocol conversion device of industrial heterogeneous network and parallel processing unit |
| CN114301995B (en) * | 2021-12-30 | 2023-07-18 | 上海交通大学 | Conversion switching and intercommunication fusion system and method of real-time industrial Ethernet protocol |
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