EP3610632A1 - Kommunikationssystem zur seriellen kommunikation zwischen kommunikationsgeräten - Google Patents
Kommunikationssystem zur seriellen kommunikation zwischen kommunikationsgerätenInfo
- Publication number
- EP3610632A1 EP3610632A1 EP18716889.3A EP18716889A EP3610632A1 EP 3610632 A1 EP3610632 A1 EP 3610632A1 EP 18716889 A EP18716889 A EP 18716889A EP 3610632 A1 EP3610632 A1 EP 3610632A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- communication device
- slave communication
- slave
- master
- signal line
- 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
- 238000004891 communication Methods 0.000 title claims abstract description 350
- 238000000034 method Methods 0.000 claims description 40
- 238000004590 computer program Methods 0.000 claims description 2
- 108010076504 Protein Sorting Signals Proteins 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 241000490229 Eucephalus Species 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
- H04W84/20—Master-slave selection or change arrangements
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
- G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
- G06F11/1004—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's to protect a block of data words, e.g. CRC or checksum
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
-
- 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
- H04L12/403—Bus networks with centralised control, e.g. polling
-
- 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
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40234—Local Interconnect Network LIN
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/695—Types of network addresses using masks or ranges of addresses
Definitions
- the present disclosure relates to a communication system for serial communication between communication devices, in particular for addressing communication devices.
- Communication devices which form a communication system with a common communication line are usually addressed, so that messages between the communication devices can be sent specifically via the common communication line.
- This address is usually unique and may be predetermined by one of the communication devices or assigned during operation of the communication system. For an address assignment during the operation of the communication system, for example, a specific communication device is designed to control the address assignment.
- the present disclosure is based on the finding that for a clear assignment of an address to a communication device in a communication network, a unique identifier of the communication device can be at least partially read.
- the disclosure relates to a communication system for serial communication between a master communication device and at least one slave communication device, wherein the master communication device and the at least one slave communication device for communication via a signal line are interconnected, wherein the at least one slave Communication device a having a unique identifier, characterized in that the master communication device is adapted to read at least a portion of the unique identifier via the signal line and to assign an address based on at least a portion of the unique identifier the at least one slave communication device and this address on the Signal line to the slave communication device to transmit.
- An assignment of an address to a slave communication device in a communication system in particular a local interconnect network (LIN), can be implemented manually, for example by setting a DIP switch, by hard wiring or by one-time programming (OTP) in the slave communication devices.
- OTP one-time programming
- the assignment of an address may require manual intervention in commissioning or maintenance of the communication system.
- the communication system is a Local Interconnect Network (LIN), wherein the signal line is formed in single wire and the master communication device and the slave communication device are connected to each other bidirectionally via the signal line.
- the respective address of the slave communication devices in the communication system in particular the LIN system, may be a Local Interconnect Network Identification (LIN-ID).
- LIN-ID Local Interconnect Network Identification
- An automatic assignment of an address to a slave communication device can be realized with a slave node position detection (SNPD) method.
- SNPD slave node position detection
- Such a method may be, for example, a bus shunt method (BSM) or a connection of the communication devices with an additional signal line, for example by an extra wire daisy chain (XWDC).
- BSM bus shunt method
- XWDC extra wire daisy chain
- Both a BSM or XWDC method may require additional hardware and / or additional signal lines.
- the communication system according to the invention realizes an automatic addressing without additional hardware complexity, in particular with respect to the LIN specification without additional circuits or signal lines.
- Both BSM and XWDC may require at least one additional signal access in the slave communication devices, and BSM may require additional circuitry in the slave communication devices.
- a limited number of slave and / or master communication devices can be interconnected, so that only a limited number of unique identifiers can be implemented in the communication system.
- an unambiguous identification and a subsequent address assignment to a slave or master communication device can already be realized with a subset of characters of the string of the unique identifier.
- the communication system is a LIN system that implements the communication between an uninterruptible power supply (UPS) and a plurality of energy storage modules.
- the master communication device may be the UPS and the at least one slave communication device may be formed by the plurality of energy storage modules.
- the unique identifier is a character string formed from a plurality of characters, wherein the master communication device is adapted to display a particular character of the plurality of characters at a particular position To retrieve a string by sending a query message to the at least one slave communication device via the signal line.
- the unique identifier of the slave communication devices may be, for example, a serial number of the respective slave communication device.
- the serial number is a 64-bit long binary string.
- the at least one slave communication device is configured to process the interrogation message of the master communication device and confirm by sending a response message over the signal line that the particular character is present at the particular position in the string of the unique identifier of the slave communication device is.
- the communication system comprises a plurality of slave communication devices
- the master communication device is configured to recognize, based on the response message received from the master communication device, whether a single slave communication device or no slave communication device or more than one slave communication device.
- Communication device of the plurality of slave communication devices has sent a response message.
- the at least one slave communication device has a first operating state in which the at least one slave communication device is configured to send out the response message to the master communication device in response to receipt of the interrogation message of the master communication device.
- At least one slave communication device is assigned, for example, no address, in particular network address.
- the at least one slave communication device has a second operating state in addition to the first operating state, in particular a Quiet mode. The at least one slave communication device is configured in the second operating state to refrain from sending a response message to the master communication device in response to receiving the query message of the master communication device.
- the at least one slave communication device is assigned, for example, no address, in particular network address.
- the at least one slave communication device in addition to the first operating state and the second operating state, has a third operating state in which an address is assigned to the at least one slave communication device. The at least one slave communication device is configured in the third operating state to refrain from sending a response message to the master communication device in response to receiving the query message of the master communication device.
- the at least one slave communication device has a first operating state, a second operating state and a third operating state and is configured to receive the response message in the first operating state, in particular only in the first operating state, in response to the query of the master communication device to send in the second and in the third operating state in response to the query message of the master communication device to send a response message or omit the transmission of the response message, wherein in the third operating state of the at least one slave communication device, an address is assigned.
- the master communication device is designed to put the at least one slave communication device into the first operating state, the second operating state or the third operating state by sending a status message via the signal line.
- the at least one slave communication device can be put into the second operating state by the reception of the device. If the at least one slave communication device is placed in the second operating state, this can at least one slave communication device can be put into the first operating state by receiving the status message from the second operating state.
- the aster communication device is configured to cause a restart of the at least one slave communication device by sending a restart message via the signal line, wherein the restart in the address in the at least one slave communication device is deleted and the at least one slave communication device is shifted from the third operating state in the first operating state.
- the master and / or slave communication devices From a received message, in particular a query, response, status or restart message, the master and / or slave communication devices read out the address field which has an address and / or further data before further contents of the message are processed , This makes it possible for the contents of the address field to be used to trigger asynchronous, global services directed to all master and / or slave communication devices.
- Such services are, for example, a global restart (reset) of the master and / or slave communication devices, wherein all master and / or slave communication devices of the communication system are placed in a state which corresponds to a state of the master and / or slave communication devices after the first switching on the master and / or slave communication devices corresponds.
- Another global service is to query a particular character at a particular position of the string of the unique identifier of the master and / or slave communication devices.
- the unique identifier is an unchangeable binary identifier.
- the reading of the unique identifier of the at least one slave communication device by the master communication device can be implemented, for example, by querying the same character at different positions. For example, if the unique identifier is a binary string, the query may check to see if a 1 exists at a particular location of the unique identifier. The specific position can in subsequent queries to a point be moved in the string. Likewise, a service that checks for a zero at a particular location of the unique identifier may be implemented.
- the disclosure relates to a method for serial communication between a master communication device and at least one slave communication device, wherein the master communication device and the at least one slave communication device for communication via a signal line are interconnected, wherein the at least one slave Communication device has a unique identifier, with reading at least part of the unique identifier of the slave communication device via the signal line; Assigning an address to the at least one slave communication device based on at least a portion of the unique identifier; and transmitting this address via the signal line to the slave communication device.
- the method further comprises: sending a restart message by the master communication device via the signal line to the at least one slave communication device such that the address assigned to the at least one slave communication device is deleted and the at least one slave communication device is deleted from the third operating state is put into the first operating state.
- the at least one slave communication device can be switched from the second operating state to the first operating state by receiving the restart message.
- the method further comprises: sending a polling message by the master communication device via the signal line to the at least one slave communication device having a character and the polling position of the character in the string of the unique identifier;
- the method further comprises terminating the method if all positions have been interrogated and during which, in particular during the interrogation, no slave communication device has responded, since all slave communication devices have been assigned an address and all slave communication devices Communication devices are placed in the third operating state.
- all messages are digitally transmitted and have 8 bytes of payload and a 1-byte checksum.
- the master communication device is configured to determine based on the checksum whether a slave communication device or a plurality of slave communication devices has sent a response message.
- the disclosure relates to a computer program having a program code for carrying out the aforementioned method when the program code is executed on a processor.
- FIG. 3 shows a signal sequence of a message in the signal line according to FIG.
- FIG. 4 shows a communication method according to an embodiment.
- FIG. 1 shows a schematic representation of a communication system 100 for serial communication between the master communication device 101 and the at least one slave communication device 103, the master communication device 101 and the at least one slave communication device 103 being connected to one another via a signal line 109 for communication are, wherein the at least one slave communication device 103 has a unique identifier 105.
- three slave communication devices 103 are exemplified.
- the master communication device 101 is designed to read out at least part of the unique identifier 105 via the signal line 109 and to the at least one slave communication device on the basis of at least a part of the unique identifier 105 103 to assign an address 107 and to transmit this address 107 via the signal line 109 to the slave communication device 103.
- the address 107 may be stored in an address field of the slave communication device 103.
- the communication system 100 may be a Local Interconnect Network (LIN), wherein the signal line 109 may be formed into a single wire and the master communication device 101 and the slave communication device 103 may be connected to each other bidirectionally via the signal line 109.
- LIN Local Interconnect Network
- FIG. 2 shows a schematic representation of a method 200 for serial communication between the master communication device 101 and the at least one slave communication device 103, the master communication device 101 and the at least one slave communication device 103 being connected to one another via the signal line 109 for communication are, wherein the at least one slave communication device 103 has a unique identifier 105, comprising the following steps: reading at least a part of the unique identifier 105 of the slave communication device 103 via the signal line 109, assigning an address 107 to the at least one slave Communication device 103 based on at least a part of the unique identifier 105 and transmitting this address 107 via the signal line 109 to the slave communication device 103.
- FIG. 3 schematically shows the signal sequence of a message in the signal line 09 according to one embodiment.
- the messages which can be sent by the master and / or slave communication devices 101, 103 via the signal line 109 can be realized in accordance with the ISO-OS1 levels 1 and 2 of the LIN standard, revision 2.1.
- a protocol frame 300 In a message, up to 8 bytes of user data can be transmitted, which are embedded in a protocol frame 300.
- a protocol frame 300 consists of
- a break field 301 which has a low signal level and a temporal
- a sync field 303 which transmits the string 0x55 (0b01010101) to realize the synchronization of a receiving circuit in the master and / or slave Köffimunikations marn, in particular a phase-locked loop (PLL); a protected ID field (PID) which contains on the back 6 bits the address 107 of the master and / or slave communication device 101, 103, which is intended as the recipient of the message, so that a maximum of 64 master and / or or slave communication devices (the remaining front 2 bits contain parity information (parity bits) to ensure that the
- a data field 307 containing up to 8 bytes of payload data
- Checksum 309 which is a 1-byte checksum entry of the bytes contained in Data-Field 307.
- the addresses 60 (0x3C) to 63 (0x3F) may be allocated for internal protocol purposes, so that the addresses 0 to 59 can be used to address the master and / or slave communication devices 101, 103. Overall, therefore, 60 master and / or slave communication devices 101, 103 can be uniquely addressed in the LIN system 100.
- an address assignment to the at least one slave communication device 103 may be implemented in the communication system 100, in particular a LIN system, without additional circuitry or additional signal access. This achieves the advantage that the address assignment to the master and / or slave communication devices 101, 103 can be implemented in a particularly user-friendly and production-efficient manner, in particular automatically.
- the master communication device 101 and the at least one slave communication device 103 send messages, in particular query, response and / or status messages, to the at least one slave communication device 103 an address 107 based on the respective unique identifier 105 of the slave communication devices 103 assign.
- the address 107 is read by the master and / or slave communication devices 101, 103, before further contents of the message are processed.
- the address 107 can be used to trigger asynchronous, global, to all master and / or slave communication devices 101, 103 services are used.
- retrieving a particular character at a particular position of the unique identifier string 105 of the master and / or slave communication devices 101, 103 is a global service.
- the mentioned global services can be understood by the master and / or slave communication devices 101, 103 already directly after switching on the master and / or slave communication devices 101, 103,
- this query is realized by querying the same character at different positions.
- the unique identifier 105 is implemented as a binary string, so that the query checks whether a 1 is present at a specific location of the unique identifier 105 of the respective master and / or slave communication device 101, 103.
- the specific location may be shifted in subsequent queries by one digit in the character chain and may begin with the first digit of the unique identifier 105.
- the master communication device 101 sends a query message to all the slave communication devices 103, the query message being an ask-for-one message containing a particular position with which the master communication device 101 queries whether at the particular position of the string unique identifier 105 a 1 is present.
- the master communication device 101 first sends after the restart message 401 an ask-for-one message, which queries whether a 1 is present at the first position of the string of the unique identifier 105. Subsequent ask-for-one messages of the master communication device 101 sequentially query the positions of the unique identifier string 105 following the first position.
- the master communication device 101 When the master communication device 101 sends an ask-for-one message, one of the following three possible states occurs: None of the plurality of slave communication devices 103 has a 1 at the polled position, so no slave communication device 103 transmits a response message. The master communication device 101 sends after a certain time (timeout) another query message with a subsequent position.
- Exactly one slave communication device 103 of the plurality of slave communication devices 103 has a 1 at the polled position, so that this slave communication device 103 transmits a response message.
- the master then sends an address assignment message containing the address to be assigned 107 in, for example, the protected ID field (PID) and the unique identifier 105 in the data field, the address assignment message being formed according to the embodiment described in FIG.
- PID protected ID field
- the one slave communication device 103 upon receipt of this message, stores the address 107 in the address field of the one slave communication device 103 and no longer responds to subsequent polling messages of the master communication device 101.
- a number of slave communication devices 103 of the plurality of slave communication devices 103 have a 1 at the polled position, so that this number of slave communication devices 103 sends a response message.
- the signal line 109 has a zero dominance, so that the response messages of the number of slave communication devices 103 generate a defective message.
- the defective message has an incorrect checksum, which can not be assigned to the content of the message. This erroneous checksum is evaluated by the master communication device 101, so that the master communication device 101 recognizes that a number of slave communication devices 103 of the plurality of slave communication devices 103 has sent a response message.
- Another number of slave communication devices 103 of the plurality of slave communication devices 103 which has not responded to the ask-for-one message of the master communication device 101 and accordingly has a 0 at the polling position, is received by the master communication device 101 placed in the second operating state, so that the further number of slave communication devices 103 no longer respond to subsequent query messages of the master communication device 101.
- the second operating state of the at least one slave communication device 103 may be in particular a Quiet mode.
- the quiet mode of the slave communication device 103 is switched over one or two bits in the byte, which according to the embodiment shown in FIG. 3 also contains the 6 bits that comprise the query position of the unique identifier 105.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Small-Scale Networks (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE20175248A BE1025127B1 (de) | 2017-04-10 | 2017-04-10 | Kommunikationssystem zur seriellen Kommunikation zwischen Kommunikationsgeräten |
PCT/EP2018/000165 WO2018188779A1 (de) | 2017-04-10 | 2018-04-06 | Kommunikationssystem zur seriellen kommunikation zwischen kommunikationsgeräten |
Publications (1)
Publication Number | Publication Date |
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EP3610632A1 true EP3610632A1 (de) | 2020-02-19 |
Family
ID=58640651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18716889.3A Pending EP3610632A1 (de) | 2017-04-10 | 2018-04-06 | Kommunikationssystem zur seriellen kommunikation zwischen kommunikationsgeräten |
Country Status (5)
Country | Link |
---|---|
US (1) | US11457507B2 (de) |
EP (1) | EP3610632A1 (de) |
CN (1) | CN110495157B (de) |
BE (1) | BE1025127B1 (de) |
WO (1) | WO2018188779A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT522607B1 (de) * | 2019-05-23 | 2024-09-15 | Sticht Tech Gmbh | Verfahren zur Datenübertragung |
DE102021200081A1 (de) * | 2021-01-07 | 2022-07-07 | Robert Bosch Gesellschaft mit beschränkter Haftung | Kommunikationssteuereinrichtung für eine Teilnehmerstation für ein serielles Bussystem und Verfahren zur Kommunikation in einem seriellen Bussystem |
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2017
- 2017-04-10 BE BE20175248A patent/BE1025127B1/de active IP Right Grant
-
2018
- 2018-04-06 WO PCT/EP2018/000165 patent/WO2018188779A1/de unknown
- 2018-04-06 EP EP18716889.3A patent/EP3610632A1/de active Pending
- 2018-04-06 CN CN201880024396.XA patent/CN110495157B/zh active Active
- 2018-04-06 US US16/500,751 patent/US11457507B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
US11457507B2 (en) | 2022-09-27 |
US20200084834A1 (en) | 2020-03-12 |
BE1025127B1 (de) | 2018-11-16 |
BE1025127A1 (de) | 2018-11-06 |
CN110495157A (zh) | 2019-11-22 |
WO2018188779A1 (de) | 2018-10-18 |
CN110495157B (zh) | 2023-03-17 |
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