WO2008009248A1 - Anordnung und verfahren zum übertragen von daten - Google Patents
Anordnung und verfahren zum übertragen von daten Download PDFInfo
- Publication number
- WO2008009248A1 WO2008009248A1 PCT/DE2006/001269 DE2006001269W WO2008009248A1 WO 2008009248 A1 WO2008009248 A1 WO 2008009248A1 DE 2006001269 W DE2006001269 W DE 2006001269W WO 2008009248 A1 WO2008009248 A1 WO 2008009248A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- communication
- data
- quality
- transmission
- communication devices
- Prior art date
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Classifications
-
- 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
- H04L12/40169—Flexible bus arrangements
- H04L12/40176—Flexible bus arrangements involving redundancy
Definitions
- the invention relates to an arrangement having a guide device, at least one communication device connected to the guide device and at least one data transmission device which is connected to the communication device via a communication path.
- a routing device can be connected to a plurality of communication devices in the form of telecontrol nodes via a LAN (Local Area Network) network.
- Telecontrol nodes are also known in English as DA (Data Acquisition) or FE (Front End) components.
- Telecontrol devices eg field devices or protective devices
- Telecontrol devices which serve as a data transmission device and transmit measured values or the like as data to the telecontrol nodes, are also connected to the telecontrol nodes.
- transducers or the like may be connected, the information of which transmit the telecontrol devices to the telecontrol nodes as data.
- the invention has for its object to provide an arrangement in which a particularly good transmission quality is achieved on the way to the guide for the data.
- the data transmission device communicates with at least two interconnected communication devices via a respective communication path and transmits data to each of the communication devices
- the communication devices are each configured such that they allow the transmission quality of their communication path the data transmission device, form a quality value describing the transmission quality of the communication path and send its quality value to the respective other communication devices
- the communication devices are each configured to compare the quality value of the own communication path with those of the other communication paths and the communication device that the has the largest own quality value, the data of the data transmitting device forwards to the guide and the remaining commun ication devices do not forward the data of the data transmission device to the guide or let it pass on.
- a significant advantage of the arrangement according to the invention is the fact that an optimal transmission quality with respect to the data reaching the guide is achieved; This is due to the inventively provided preselection of that communication device which is connected to the data transmission device via the best transmission path.
- connection eg network, Data bus, etc.
- connection eg network, Data bus, etc.
- the preselection of the best communication device for forwarding the data it is ensured that only the data of a single communication device reach the guiding device and the poorly transmitted data of the other communication devices are retained (eg discarded or only stored locally).
- a third significant advantage of the invention is that the availability of the data transmitting device is increased and the reaction times are shortened.
- the communication devices repeat the transmission quality, preferably regularly, determine and exchange with each other and the communication device that transmits the data of the data transmission device to the guide is forwarded, as soon as another of the communication devices determines a better transmission quality.
- Two data transmission devices are preferably connected to at least one of the communication devices, wherein the determination of the quality values as well as the selection of the communication device forwarding the data transmission device are carried out individually for each data transmission device.
- the guiding device is preferably connected to the at least two communication devices via a data transmission network or via a data transmission bus. About this Data transmission network or via this data transfer bus and the at least two communication devices can be interconnected.
- the communication paths may be formed for example by a radio link, a telephone or modem connection or a high voltage line with data signals modulated thereon.
- the data transmission device can be formed by a telecontrol device and / or the at least two communication devices in each case by a remote acting node.
- the data transmission device can be formed, for example, by an automation device.
- a measuring sensor or a switch can be connected to the data transmitting device, which supplies the information transmitted as data to the guiding device to the data transmitting device.
- the invention also relates to a method for transmitting data from a data transmission device to a guidance device, in which the data is transmitted via at least one communication device. and at least via a communication path.
- the invention is in this respect the task of specifying a method in which a particularly high transmission quality of the data is achieved on their way to the guide.
- this object is achieved in that the data is transmitted to at least two communication devices via a respective communication path, the transmission quality of the communication paths is checked and a quality value describing the transmission quality of the respective communication path is formed and the quality values of the communication paths are compared and with the communication device having the highest quality value, the data is forwarded to the guide.
- the invention also relates to a communication device for use in an arrangement as described above.
- the communication device to have a device, in particular a microprocessor device or a data processing system (DV system), which is programmed in such a way that the communication device determines the transmission quality of its grain.
- a device in particular a microprocessor device or a data processing system (DV system)
- DV system data processing system
- FIG. 1 shows a first exemplary embodiment of an arrangement according to the invention, in which a data transmission device is connected to two communication devices via two physically separate communication paths,
- FIG. 2 shows a second embodiment of an inventive arrangement in which a data transmission means is connected to two communication devices by means of a splitter
- Figure 3 shows a third embodiment of an inventive arrangement. in which in each case two data transmission devices are connected to two communication devices
- FIG. 4 shows a fourth exemplary embodiment of an arrangement according to the invention, in which the communication devices are connected to one another by means of a separate communication network
- Figure 5 shows a fifth embodiment of an inventive arrangement in which three communication devices are connected to a data transmitting device
- Figure 6 shows an example of a hysteresis curve that controls the switching of the communication devices.
- FIG. 1 shows a guide device 10 which, for example, forms part of a guidance system for an energy transmission system.
- the guide device 10 With its connection AlO, the guide device 10 is connected to a data transmission network 20.
- the data transmission network 20 can be, for example, an Ethernet-compatible network (eg a LAN) via which data is transmitted in the form of data packets in accordance with the Internet protocol.
- the two communication devices 30 and 40 Connected to the data transmission network 20 are two communication devices 30 and 40, namely a first communication device 30 with its network connection N30 and a second communication device 40 with its network connection N40.
- the two communication devices 30 and 40 may be, for example, telecontrol nodes of the control system.
- the two communication devices 30 and 40 are connected to a data transmission device 50, which may be a telecontrol device of the control system, for example.
- the data transmission device 50 is connected with its one output A50a to a communication path 60 which establishes the connection to an input E30 of the first communication device 30.
- the data transmission device 50 is connected to a second communication path 70, which connects the data transmission device 50 to an input E40 of the second communication device 40.
- a multiplicity of data sources 100 are connected to the data transmission device 50, which transmit measured values, switching states or other information I to the data transmission device 50.
- the data sources may be, for example, measuring sensors, transducers, switches or the like.
- the arrangement according to FIG. 1 can be operated as follows:
- the data sources 100 send their respective measurement data or information I to the data transmitter 50. This collects the measurement data or information from the data sources 100 and transmits them in unprocessed or processed form to the two communication devices 30 and 40 as data D. For this purpose, it feeds the data D in the first communication path 60 and in the second communication path 70, so that the data D to each of the two communication devices 30 and 40 can get.
- the two communication devices 30 and 40 are each designed such that they can measure the transmission quality of their associated communication path 60 or 70, with which they are connected via the input E30 or E40, and can determine a quality value that describes the transmission quality.
- the determination of the quality value can be based on different criteria and relate, for example, to different layers of the Open Systems Interconnection Reference Model (OSI) layer model:
- OSI Open Systems Interconnection Reference Model
- the quality value can refer to the physical transmission level and take into account whether the signal-to-noise ratio is determined by the communication path within a predetermined range or whether the resting level of the communication path is correct.
- the quality value may also refer to the so-called link layer and quantify bit errors or checksum errors or other information distortions.
- the quality value can also relate to the network layer and take into account whether data of unknown or foreign subscribers, for example due to crosstalk of lines, are also detected in a disturbing manner.
- the quality value may also relate to the transport layer and take into account, for example, time-out errors or the like.
- the selection of which of the named criteria is used for determining the quality value is preferably made dependent on the physical operation of the two communication paths 60 and 70.
- the quality values in the two communication devices 30 and 40 should preferably be formed in an identical manner, so that comparable quality values are available.
- a quality value Q1 is formed in the first communication device 30, which quantitatively describes the transmission quality of the first communication path 60.
- the second communication device 40 generates a second quality value Q2 which describes the transmission quality on the second communication path 70.
- the two communication devices 30 and 40 exchange their quality values via the data transmission network 20 so that both quality values Q1 and Q2 are available both in the first communication device 30 and in the second communication device 40.
- Both communication devices are now configured such that they compare the present quality values Q1 and Q2 with each other and determine which of the two quality values Q1 and Q2 indicates a better transmission quality and thus determines the more suitable communication path. If, for example, the first quality value Q1 is greater than the second quality value Q2, this would mean that the first communication path 60 has a better transmission quality than the second communication path 70. In a corresponding manner, a larger second quality value Q2 would indicate a better transmission quality of the second communication path 70.
- the first communication path 60 offers a better transmission quality and thus the first quality value Q1 is greater than the second quality value Q2:
- Quality value Q2 and thus the communication path 60 connected at its input E30 has better transmission characteristics than the second communication path 70 will they forward the received data D via the data transmission network 20 to the routing device 10, which will further process the data D below.
- the second communication device 40 will find that the communication path 70 connected to its input E40 has worse characteristics than the first communication path 60, and thus that the received data D present in the second communication device 40 is less trustworthy than the one corresponding data D received in the first communication device 30.
- the second communication device 40 will thus not consider the received data D any further and, in particular, will not forward it further to the guide device 10.
- the data D received in the second communication device 40 is therefore discarded.
- the two communication devices 30 and 40 which continuously measure the quality values Q1 and Q2, preferably regularly or periodically, determine that the quality values Q1 and Q2 change and the second quality value Q2 becomes greater than the first quality value Q1. In this case, there will be a switching within the two communication devices 30 and 40 such that subsequently the second communication device 40 to the data D to the guiding device 10 forwards and the first communication device 30 discards the received data D.
- a hysteresis behavior is preferably implemented in each of the two communication devices is shown by way of example in FIG.
- switching from the first communication device 30 to the second communication device 40 occurs only when the difference Q1-Q2 between the two quality values Q1 and Q2 falls below a predetermined threshold value .DELTA.Q.sub.min, and that switching occurs from the second communication device 40 to the first communication device 30 only when the difference Q1-Q2 exceeds a predetermined threshold value ⁇ Qmax: As long as the difference Q1-Q2 lies between ⁇ Qmin and ⁇ Qmax, that communication device remains connected to the guide device 10 which already has its data D has transmitted to the guide 10, whereby an unnecessary switching of the communication devices 30 and 40 is avoided.
- the switching state Sl represents the state that the data of the communication device 30 are forwarded to the guide 10; the switching state S2 shows the case that the data of the communication device 40 are forwarded to the guide 10.
- 2 shows a second embodiment of an inventive arrangement is shown.
- the data transmitting device 50 is connected to the two communication devices 30 and 40 via only a single port A50.
- a common line 200 is connected, which is in communication with a Y-branch 210.
- Y-branch 210 Connected to the Y-junction 210 are two branch lines 220 and 230 which connect to the two communication devices 30 and 40.
- the first communication path 60 is thus formed by the common line 200, the Y-branch 210 and the branch line 220; the second communication path 70 is formed by the common line 200, the Y-branch 210 and the branch line 230. It is thus to be noted that the two communication paths 60 and 70 are physically separated only in sections.
- FIG. 3 shows a third exemplary embodiment of an arrangement.
- a total of two data transmission devices 50 and 50 ' are connected to the two communication devices 30 and 40.
- one of the two data transmission devices 50 communicates via communication paths 60 and 70 with the two communication devices 30 and 40.
- the second data transmission device 50 ' is connected to the two communication devices 30 and 40 via communication paths 60' and 70 '.
- the two communication devices 30 and 40 are now each configured such that they each determine an associated quality value for each communication path connected on the input side. Specifically, the first communication device 30 will calculate a quality value Q1 for the communication path 60 and a quality value Ql 'for the communication path 60'. In a corresponding manner, the second communication device 40 will determine a quality value Q2 for the communication path 70 and a quality value Q2 'for the communication path 70'.
- the two communication devices 30, 40 exchange their quality values via the data transmission network 20, so that all quality values are present in each of the two communication devices.
- the two communication devices 30 and 40 will now compare the present quality values with one another and forward the data D or D 'received via the respective communication path to the guide device 10 if they have received the data via the better of the respective two communication paths. This will be explained in more detail with reference to the following example: If, for example, the first communication device 30 determines that the communication path 60 is better suited than the communication path 70, it will forward the data D of the first data transmission device 50 to the guide device 10. If, on the other hand, the second communication path 70 is of better quality than the communication path 60, the forwarding of the data D of the first data transmission device 50 via the second communication device 40 would take place.
- the two communication devices 30 and 40 proceed with respect to the second data transmitting device 50 'by comparing the quality values Q1' and Q2 'with each other. If such a comparison shows that the communication path 70 'has a better transmission quality than the communication path 60', then the data D 'will be forwarded from the second data transmission device 50 to the guidance device 10 via the second communication device 40, otherwise via the first communication - device 30.
- FIG. 4 shows a fourth exemplary embodiment of an arrangement.
- This exemplary embodiment substantially corresponds to the exemplary embodiment according to FIG. 3, with the difference that the two communication devices 30 and 40 communicate with one another via a separate communication network 300 and exchange their quality values Q1, Q1 ', Q2 and Q2' via this.
- the transmission of the quality values does not take place via the data transmission network 20 but instead via the separate communication network 300.
- the remaining functioning of the communication devices 30 and 40 is not affected by this; this means that they always forward the received data D or D 'to the guiding device 10 if their own communication path has better transmission properties than the other communication path via which the respective data transmitting device is in communication with the respective other communication device.
- FIG. 5 shows this by way of example in the case where the data transmission device 50 'is connected to three communication devices 30, 40 and 40' by means of three communication paths 60 ', 70' and 70 ", each having a quality value Q1 ', Q2' or Q3 'and send it for the purpose of comparison to each other's communication facilities.
- the communication device with the best own quality value will forward the data D 'of the data transmission device 50' to the guide device 10.
- the communication devices according to FIGS. 1 to 5 can be formed, for example, by programmable microprocessor arrangements whose operation is characterized by a controlling program or a corresponding software module is controlled.
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE2006/001269 WO2008009248A1 (de) | 2006-07-18 | 2006-07-18 | Anordnung und verfahren zum übertragen von daten |
DE112006004030T DE112006004030A5 (de) | 2006-07-18 | 2006-07-18 | Anordnung und Verfahren zum Übertragen von Daten |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE2006/001269 WO2008009248A1 (de) | 2006-07-18 | 2006-07-18 | Anordnung und verfahren zum übertragen von daten |
Publications (1)
Publication Number | Publication Date |
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WO2008009248A1 true WO2008009248A1 (de) | 2008-01-24 |
Family
ID=37667570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/DE2006/001269 WO2008009248A1 (de) | 2006-07-18 | 2006-07-18 | Anordnung und verfahren zum übertragen von daten |
Country Status (2)
Country | Link |
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DE (1) | DE112006004030A5 (de) |
WO (1) | WO2008009248A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0643542A1 (de) * | 1993-09-13 | 1995-03-15 | Siemens Aktiengesellschaft | Verfahren zur Vereinigung von Datenströmen |
DE19547467C1 (de) * | 1995-12-19 | 1997-07-03 | Siemens Ag | Verfahren zur Übertragung von Informationen in einem universellen Übertragungsnetz |
US20040038647A1 (en) * | 1993-12-20 | 2004-02-26 | Intermec Technologies Corporation | Local area network having multiple channel wireless access |
-
2006
- 2006-07-18 DE DE112006004030T patent/DE112006004030A5/de not_active Withdrawn
- 2006-07-18 WO PCT/DE2006/001269 patent/WO2008009248A1/de active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0643542A1 (de) * | 1993-09-13 | 1995-03-15 | Siemens Aktiengesellschaft | Verfahren zur Vereinigung von Datenströmen |
US20040038647A1 (en) * | 1993-12-20 | 2004-02-26 | Intermec Technologies Corporation | Local area network having multiple channel wireless access |
DE19547467C1 (de) * | 1995-12-19 | 1997-07-03 | Siemens Ag | Verfahren zur Übertragung von Informationen in einem universellen Übertragungsnetz |
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DE112006004030A5 (de) | 2009-06-10 |
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