EP4211871A1 - Verfahren zum betreiben eines netzwerks - Google Patents
Verfahren zum betreiben eines netzwerksInfo
- Publication number
- EP4211871A1 EP4211871A1 EP21770210.9A EP21770210A EP4211871A1 EP 4211871 A1 EP4211871 A1 EP 4211871A1 EP 21770210 A EP21770210 A EP 21770210A EP 4211871 A1 EP4211871 A1 EP 4211871A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- network
- addressing means
- data packets
- controller
- switch
- 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 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 230000010354 integration Effects 0.000 description 3
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/25—Routing or path finding in a switch fabric
- H04L49/253—Routing or path finding in a switch fabric using establishment or release of connections between ports
- H04L49/254—Centralised controller, i.e. arbitration or scheduling
-
- 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]
- H04L12/40—Bus networks
-
- 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
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
-
- 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
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
- H04L12/4645—Details on frame tagging
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/36—Flow control; Congestion control by determining packet size, e.g. maximum transfer unit [MTU]
- H04L47/365—Dynamic adaptation of the packet size
-
- 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]
- H04L12/40—Bus networks
- H04L2012/4026—Bus for use in automation systems
Definitions
- the present invention relates to a method for operating a network, in particular an automation network,
- the method should be suitable for integrating components of an automation network into an existing multifunctional network, for example into an Ethernet network, in particular into a fieldbus network which is designed as an Ethernet bus.
- a SERCOS III automation network for example, is based on summation frame telegrams in the form of Ethernet broadcasts without a VLAN tag. It therefore requires a specific network topology, such as a ring or line topology, with a stable sequence of participants.
- a correspondingly known communication in an automation network is known, for example, from WO 2018/215209 A1.
- the devices are mainly connected in a line topology and made possible by appropriate communication using data telegrams.
- a method for transmitting telegrams in an automation network is known from DE 10 2018 129 809 A1 in order to also provide data nodes in an automation network, for example in order to be able to make the sequence of participants more variable.
- the topology used to connect the devices to the automation network is also fixed here.
- the object of the present invention is therefore to integrate an automation network into an existing network and to facilitate the use of a number of network topologies, by means of which the devices or participants in the network are connected to one another.
- a method for operating a network with at least one switch serves as a node in the network and can send or receive data in all directions of the node.
- the switch also contains programmable logic that can store and use the relationships to the other participants in the network.
- the network also includes at least two end devices and a controller.
- the controller is also referred to as the master in an automation network.
- the controller can send data to a specific end device via an application protocol in order to control it.
- the application protocol is implemented via the application layer of the OSI network model. This means that communication is implemented via the application protocol in OSI layer 7.
- the data sent in this way is divided into data packets according to the specification for Internet networks and sent via the data link layer of the network.
- an additional addressing means is added to the data packets within the security layer so that the data packets can reach the desired destination and can be addressed to it.
- the switch can recognize this additional addressing means and/or ensure transmission to the addressed terminal device by adding the addressing means.
- the controllers can also recognize and/or add the additional addressing means.
- the additional addressing means of the data packets are removed again, so that the original data packets are restored from the data originally sent to the end device.
- the addressed network subscribers can be selected.
- the data packet does not have to be sent to all devices using a broadcast command, but a preselection is made. Using this preselection, it is possible to implement different network topologies that are connected to the switches and still ensure communication in the automation network.
- the additional addressing means can be added by the controller itself or by the switches used in the network. The removal the additional addressing means can then also be done by the switches or the controller.
- One possibility of the additional means of addressing is the identification of a communication relationship and the assignment of a VLAN, as is used, for example, from the "Mask & Match" method (IEEE 802.1CBdb). This function first identifies a communication relationship between the addressed end device and the controller or a switch and thus limits the number of addressed end devices. By assigning a VLAN, the request is then only sent to a limited number of end devices in the network.
- the additional addressing means is a multicast, unicast or broadcast to only certain MAC addresses in the network.
- every end device, every switch and also the controller has a fixed MAC address, which is known to the switch. Accordingly, the request can only be sent to a limited number of end devices with a certain group of MAC addresses.
- This method is referred to as "active destination MAC" and is known from the IEEE 802.1 CB.
- VLAN tags can also be used, which are assigned depending on the egress port neighbor. These VLAN tags are also added to the data packets. This option assigns a VLAN to a specific group of end devices and thus addresses them.
- this can also be implemented by a source address.
- the address of the sender (source) is used for this.
- An Ethertype as defined in IEEE 802.3 can also be used.
- a bit mask is conceivable as an additional addressing means, which is placed over part of a data packet, preferably over the first bytes of a data packet,
- the switches should be placed at the nodes of the networks, preferably between the controller and end devices. As a result, different topologies can be interconnected in a network from these nodes.
- the end devices of the automation networks can be connected in series, depending on the topology in a ring or in a line. This also corresponds to the normal function of an automation network. In principle, several automation networks can thus be connected together in one network using the switches, with subscribers who do not belong to the automation network also being able to participate in the same network.
- the method according to the invention includes the terminal devices being able to respond in accordance with the automation network and the application protocol, so that the response can be sent from the terminal devices to the appropriate controller.
- the method works in a similar way to the method described above, so that an additional addressing means is added to the data packets within the data link layer and the data packets are sent to the terminal device, for example the controller, via the data link layer. In this case, too, the additional addressing means is removed before transmission to the addressed terminal device.
- the advantage of this procedure is that only the virtual network is visible to the application protocol and thus the normal application commands for the Automation network are made possible.
- the real network can be set up differently by the switches, so that almost any combination of automation networks and normal network is possible.
- the combination of different topologies is also possible.
- controllers and terminals are participants in an automation bus. This bus is then operated as an automation network with Ethernet specification.
- a network management system which is preferably implemented as software, in order to be able to carry out the desired course of the data from a network subscriber to the terminal device.
- FIG. 1 A network according to the invention with two switches
- FIG. 2 A branched real network according to the invention
- FIG. 3 A virtual network according to the invention in relation to FIG. 2;
- FIG. 4 A branched real network according to the invention.
- FIG. 5 A virtual network according to the invention in relation to FIG. 4;
- FIG. 6 A branched real network according to the invention.
- Figure 7 A virtual network according to the invention in relation to Figure 6.
- Figure 1 shows a network according to the invention with three terminals 20, 21, 22, two switches 30, 31 and a controller 40.
- the controller and the end devices are taken from an automation network.
- the terminals 20, 21 are included in a different network branch than the terminal 22.
- the terminals 20, 21 are arranged in a line topology and the terminal 22 in a ring topology.
- the branches or different topologies are connected by two switches 30, 31. Accordingly, the switches 30, 31 represent nodes in the network which connect the different branches or topologies.
- the controller 40 now wants to send data for controlling a terminal device to terminal device 20, for example, the corresponding data are sent to the network via the application protocol.
- the application protocol is executed in the application layer of the OSI network model.
- this data is now divided into data packets and, according to the invention, is sent via the security layer (OSI model layer 2).
- OSI model layer 2 OSI model layer 2.
- an additional means of addressing is added to the data packets 1 and sent.
- the addition can be done via the controller 40 or via the switch 30.
- the additional addressing means defines a group of participants in the network, which is then addressed. This means that now not all participants in the network are addressed via a broadcast, as is usual in an automation network, but only some of the participants, for example participants of a specific branch in the network.
- an additional addressing means is now added to the data 1 in order to address the terminal 20 .
- the request is sent to the participants 20, 21 of the upper branch of the network in FIG.
- the switch 30 ensures that only these participants are addressed, which uses the addressing means to identify which branch of the network must be addressed in order to reach the addressed participant 20 .
- the request first reaches terminal 21, which is not addressed by the additional addressing means, and is forwarded 7 to terminal 20.
- the addressing means and specific destination match, so that terminal 20 accepts and converts the data.
- the addressing means is removed before the terminal 20 is reached. This is done, for example, by the switch 30. After the addressing means has been evaluated, the switch can reach the two terminals 20, 21 via a multicast without requiring the additional addressing means for this.
- Figures 2, 4 and 6 each show possible real networks, each containing a number of terminals 20-25 in different branches of the network.
- the network also includes switches 30, 31 and controllers 40, 41.
- the switches 30, 31 are arranged at the nodes of the network and connect the individual branches of the network.
- the branches in turn, can be implemented in different topologies.
- FIGS. 3, 5 and 7 show the corresponding virtual networks, corresponding to the above FIGS. 2, 4 and 6, as recognized and used by the participants in the automation network. The way it works corresponds to the method described in Figure 1.
- FIGS. 2 to 7 show possible combinations of different network branches and topologies, which would not be possible with a normal, conventional automation network. Only the switches know the real network and can act accordingly.
- a router or server could be used instead of at least one switch. Likewise, more than two switches and/or controllers could be used.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Small-Scale Networks (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020123275 | 2020-09-07 | ||
PCT/EP2021/074223 WO2022049173A1 (de) | 2020-09-07 | 2021-09-02 | Verfahren zum betreiben eines netzwerks |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4211871A1 true EP4211871A1 (de) | 2023-07-19 |
Family
ID=77774910
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21770212.5A Pending EP4211873A1 (de) | 2020-09-07 | 2021-09-02 | Verfahren zum betreiben eines netzwerks |
EP21770211.7A Pending EP4211872A1 (de) | 2020-09-07 | 2021-09-02 | Verfahren zum betreiben eines netzwerks |
EP21770210.9A Pending EP4211871A1 (de) | 2020-09-07 | 2021-09-02 | Verfahren zum betreiben eines netzwerks |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21770212.5A Pending EP4211873A1 (de) | 2020-09-07 | 2021-09-02 | Verfahren zum betreiben eines netzwerks |
EP21770211.7A Pending EP4211872A1 (de) | 2020-09-07 | 2021-09-02 | Verfahren zum betreiben eines netzwerks |
Country Status (5)
Country | Link |
---|---|
US (3) | US20230336380A1 (de) |
EP (3) | EP4211873A1 (de) |
CN (3) | CN116018785A (de) |
DE (3) | DE102021122684A1 (de) |
WO (3) | WO2022049174A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116708536B (zh) * | 2023-08-09 | 2023-10-24 | 江苏中威科技软件系统有限公司 | 一种基于雾计算的跨平台终端互联的通讯协议实现的方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10047925A1 (de) | 2000-09-27 | 2002-05-02 | Siemens Ag | Verfahren zur Echtzeitkommunikation zwischen mehreren Netzwerkteilnehmern in einem Kommunikationssystem mit Ethernet-Physik sowie korrespondierendes Kommunikationssystem mit Ethernet-Physik |
DE10254580A1 (de) * | 2002-11-22 | 2004-06-03 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Übertragung von Daten in Nachrichten auf einem Bussystem |
US8295287B2 (en) | 2010-01-27 | 2012-10-23 | National Instruments Corporation | Network traffic shaping for reducing bus jitter on a real time controller |
DE102014100628B4 (de) * | 2013-01-21 | 2016-08-18 | Voice Inter Connect Gmbh | Bussystem und Verfahren zur Übertragung von Daten in Echtzeit |
DE102013211406A1 (de) * | 2013-06-18 | 2014-12-18 | Siemens Aktiengesellschaft | Kommunikationsgerät zur Verbindung eines Feldgeräts eines industriellen Automatisierungssystems mit einer ausfallgesicherten Steuerungseinheit und industrielles Automatisierungssystem |
DE102014226994A1 (de) * | 2014-12-29 | 2016-06-30 | Robert Bosch Gmbh | Kommunikationssystem zum Betreiben eines Datennetzwerks |
WO2017092879A1 (de) | 2015-11-30 | 2017-06-08 | Siemens Aktiengesellschaft | Verfahren zur industriellen kommunikation über tsn |
DE102017208735A1 (de) | 2017-05-23 | 2018-11-29 | Siemens Aktiengesellschaft | Verfahren und Vorrichtung zum Schutz einer Kommunikation zwischen mindestens einer ersten Kommunikationseinrichtung und wenigstens einer zweiten Kommunikationseinrichtung insbesondere innerhalb eines Kommunikationsnetzwerkes einer industriellen Fertigung und/oder Automatisierung |
EP3522477B1 (de) * | 2018-01-31 | 2021-08-11 | Siemens Aktiengesellschaft | Verfahren zur daten-kommunikation in einem insbesondere industriellen netzwerk, vorrichtung zur durchführung des verfahrens, computerprogramm sowie computerlesbares medium |
CN113056892A (zh) * | 2018-11-13 | 2021-06-29 | Abb瑞士股份有限公司 | 在tsn感知网络上传输分组 |
DE102018129809A1 (de) | 2018-11-26 | 2020-05-28 | Beckhoff Automation Gmbh | Verteilerknoten, Automatisierungsnetzwerk und Verfahren zum Übertragen von Telegrammen |
EP3697034A1 (de) | 2019-02-14 | 2020-08-19 | Siemens Aktiengesellschaft | Verfahren zur datenübertragung, gerät, computerprogramm und computerlesbares medium |
DE102019114309A1 (de) | 2019-05-28 | 2020-12-03 | Beckhoff Automation Gmbh | Verfahren zum Routen von Telegrammen in einem Automatisierungsnetzwerk, Datenstruktur, Automatisierungsnetzwerk und Netzwerkverteiler |
CN111600754B (zh) * | 2020-05-11 | 2022-02-25 | 重庆邮电大学 | 一种面向tsn和非tsn互联的工业异构网络调度方法 |
-
2021
- 2021-09-02 DE DE102021122684.8A patent/DE102021122684A1/de active Pending
- 2021-09-02 US US18/019,887 patent/US20230336380A1/en active Pending
- 2021-09-02 CN CN202180054750.5A patent/CN116018785A/zh active Pending
- 2021-09-02 WO PCT/EP2021/074224 patent/WO2022049174A1/de unknown
- 2021-09-02 EP EP21770212.5A patent/EP4211873A1/de active Pending
- 2021-09-02 WO PCT/EP2021/074223 patent/WO2022049173A1/de unknown
- 2021-09-02 DE DE102021122686.4A patent/DE102021122686A1/de active Pending
- 2021-09-02 US US18/019,915 patent/US20230362033A1/en active Pending
- 2021-09-02 WO PCT/EP2021/074225 patent/WO2022049175A1/de unknown
- 2021-09-02 EP EP21770211.7A patent/EP4211872A1/de active Pending
- 2021-09-02 US US18/019,927 patent/US20230291695A1/en active Pending
- 2021-09-02 EP EP21770210.9A patent/EP4211871A1/de active Pending
- 2021-09-02 CN CN202180054805.2A patent/CN116057897A/zh active Pending
- 2021-09-02 DE DE102021122685.6A patent/DE102021122685A1/de active Pending
- 2021-09-02 CN CN202180054973.1A patent/CN116018786A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
CN116018785A (zh) | 2023-04-25 |
CN116018786A (zh) | 2023-04-25 |
CN116057897A (zh) | 2023-05-02 |
EP4211873A1 (de) | 2023-07-19 |
EP4211872A1 (de) | 2023-07-19 |
US20230336380A1 (en) | 2023-10-19 |
WO2022049175A1 (de) | 2022-03-10 |
DE102021122684A1 (de) | 2022-03-10 |
US20230291695A1 (en) | 2023-09-14 |
US20230362033A1 (en) | 2023-11-09 |
DE102021122686A1 (de) | 2022-03-10 |
WO2022049173A1 (de) | 2022-03-10 |
WO2022049174A1 (de) | 2022-03-10 |
DE102021122685A1 (de) | 2022-03-10 |
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