EP3284193A1 - Ubertragungsverfahren und vorrichtungen zur übertragung - Google Patents
Ubertragungsverfahren und vorrichtungen zur übertragungInfo
- Publication number
- EP3284193A1 EP3284193A1 EP16722522.6A EP16722522A EP3284193A1 EP 3284193 A1 EP3284193 A1 EP 3284193A1 EP 16722522 A EP16722522 A EP 16722522A EP 3284193 A1 EP3284193 A1 EP 3284193A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- data
- extracted
- memory cell
- address
- frame delimiter
- 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.)
- Ceased
Links
Classifications
-
- 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
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4204—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus
- G06F13/4208—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being a system bus, e.g. VME bus, Futurebus, Multibus
- G06F13/4213—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being a system bus, e.g. VME bus, Futurebus, Multibus with asynchronous protocol
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
-
- 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
- H04L1/0041—Arrangements at the transmitter end
-
- 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
- H04L1/0045—Arrangements at the receiver end
Definitions
- Communication link to a receiving unit and a method for receiving over an ICL from a
- Transmitter transmitted data and devices for transmitting data via an ICL Transmitter transmitted data and devices for transmitting data via an ICL.
- the Inter Communication Link (ICL) is a
- the ICL is on the plane
- the ICL is then referred to as ILDL (Intra Lane Data Link).
- ILDL Intra Lane Data Link
- the ICL uses a reflective memory as a communication principle. Reflective memory networks have been developed to provide highly deterministic, timely-matched performance for distributed systems
- CONFIRMATION COPY On this basis, it is an object of the invention to provide a method that reliably transmits or catches asynchronous data streams.
- Embodiments of the method for receiving data, the transmitting unit, the receiving unit, as well as the computing system and the use of the computing system in an aircraft apply and vice versa.
- the method further has the
- Step extract the address of the memory cell
- Extract the data word from the identified data comprises the step of calculating a CRC (cyclic redundancy check) checksum from the extracted
- the method further includes the step of generating a data packet to be transmitted by appending a start frame delimiter and a stop frame delimiter to the extracted address of the memory cell, the extracted data word, and the calculated CRC checksum. Furthermore, the method comprises the step of sending the data packet.
- the ICL Inter Computer Link
- CRC cyclic redundancy check
- Memory cell and the data word is a CRC checksum calculated and supplemented with a Start Frame Delimiter and a Stop Frame Delimiter and sent as a packet.
- the invention is based on the idea of a time-deterministic transmission of memory contents
- the logical value "1" is transmitted continuously as long as no data packet is sent, as long as no accesses are made in the transmitting part to the ICL memory on the serial
- the start frame delimiter consists of a sequence of three Manchester II half bits with the value "1" and / or the stop frame delimiter consists of a sequence of three Manchester II half bits with the value " 0 ".
- the Start Frame Delimiter consists of a sequence of three half-bits of Manchester with the value "1”, which allows unambiguous recognition of the Start Frame Delimiter.
- the End Frame Delimiter consists of a sequence of three
- the Manchester code is a line code that receives the clock signal during encoding, whereby a bit sequence modulates the phase position of a clock signal in binary form
- the first half bit is identical to the data bit and the second half bit is the complement of the data bit.
- the first half-bit is the
- the deterministic detectable transmission duration is achieved. According to one embodiment of the method, the
- the signal rate is serial
- the memory addresses can be transmitted with, for example, 12 bits, the data words are transmitted, for example, with 32 bits and the CRC
- Example of the method results in continuous data transmission, for example, a user data rate of slightly more than 1.4. Mbyte / s.
- the method is not limited to the example shown here. The example shown here is merely illustrative of the method described herein.
- a method of receiving data via an ICL from a transmitting unit comprising the step of receiving a data packet.
- the method further includes checking the validity of the received packet based on the length between a start frame delimiter and a stop frame delimiter of the data packet.
- the method comprises extracting a CRC checksum, an address of a memory cell and a data word from the data packet.
- the method further comprises calculating a CRC checksum from the extracted address of the memory cell and the extracted data word.
- the method further includes writing the extracted data word to the extracted one Address of the memory cell in a data memory when the calculated CRC checksum matches the extracted CRC checksum.
- the receiver recognizes the packet at the start frame delimiter and checks the validity of the packet based on the length between the start and stop frame delimiter. The contained address and the data word as well as the CRC are decoded. The CRC from the address and the data word is calculated by the receiving part and compared with the received CRC. If the calculated CRC and the received CRC are equal, then the received
- Data word is written to the memory of the receiving part to the decoded address and is available there for access via a parallel data bus.
- the verification of the CRC has the advantage that errors in the transmission of the data can be more easily detected.
- the address of the memory cell of the receiving unit is identical to the
- a transmitting unit for transmitting data via an ICL to a receiving unit is specified, wherein the
- Transmitting unit comprises a processor which is adapted to identify data to be transmitted in one
- the processor is further configured to extract the address of the memory cell and the data word from the identified data. Next, the processor is set up to extract a CRC from the
- the processor is further configured to generate a data packet to be transmitted by appending a start frame delimiter and a stop frame delimiter to the extracted address of the memory cell, the extracted data word and the calculated CRC.
- the transmitting unit further comprises a transmitter configured to send the data packet. Furthermore, a receiving unit for receiving data via an ICL from a transmitting unit is specified, wherein the
- Receiving unit has a receiver configured to receive a data packet.
- the receiving unit further comprises a processor arranged to check the validity of the received packet based on the length between a start frame delimiter and a stop frame delimiter of the data packet.
- the processor is further configured to extract a CRC, an address of a memory cell, and a data word from the data packet. Next, the processor is set up to retrieve a CRC from the extracted address of the
- the processor is further configured to compare the calculated CRC with the extracted CRC. Further, the processor is set up to extract the extracted data word Address of the memory cell in a data memory too
- Receiving unit can be, for example, a DAL-A and / or DAL-B security certified processor.
- DAL Design Assurance Level
- DAL A to DAL E five levels of security, also known as DAL (Design Assurance Level) levels DAL A to DAL E, are used. The different stages are over one
- DAL-A refers to "catastrophic" effects on the aircraft in the event of a failure - to DAL-E "no effect".
- processors are available as DAL-A and / or DAL-B.
- DAL-A and / or DAL-B the use of multi-core processors for a DAL-A or DAL-B critical use is usually very limited or not possible, since these processors often have little or no required security, predictability and the required determinism. According to one
- the processor of the transmitting unit and / or the processor of the receiving unit is an FPGA (Field
- FPGA Processors for DAL-A or DAL-B Critical applications are available, but compared to current multicore processors have a significantly lower computational power.
- a computing system comprising at least one previously described transmitting unit for connecting the Calculation system specified with at least one other computing system.
- the computing system has at least one receiving unit described above.
- communication with the second computing system is via an optical or electrical signal line.
- an aircraft which has at least one first arithmetic unit and one second arithmetic unit.
- the first arithmetic unit has at least one previously
- the second arithmetic unit has at least one previously described receiving unit.
- the aircraft further has a data network, wherein the transmitting unit of the first processing unit is designed to transmit data via the data network to the receiving unit of the second processing unit.
- FIG. Figure 1 shows a flow diagram of an embodiment of the method for transferring data
- FIG. Figure 2 shows a flow diagram of an embodiment of the method for receiving data
- FIG. Fig. 3 shows the construction of an embodiment of a transmitting unit
- FIG. Fig. 4 shows the structure of an embodiment of a receiving unit
- FIG. Fig. 5 shows the structure of an embodiment of a computing system
- FIG. Figure 6 shows an embodiment of an aircraft with a first and a second arithmetic unit.
- FIG. 1 shows an example of a flow chart of a
- step 101 data to be transmitted is identified in a memory cell of a data memory.
- step 102 data to be transmitted is identified in a memory cell of a data memory.
- step 103 a CRC checksum is calculated from the extracted address of the memory cell and the extracted data word.
- step 104 a data packet to be sent is attached by appending a start frame delimiter and a stop frame delimiter to the
- step 105 the generated data packet is sent.
- the logic value "1" is continuously transmitted in a further step, as long as no data packet is sent in.
- the start frame delimiter preferably consists of a sequence of three
- Manchester II Half bits with the value "1" and / or the stop frame delimiter preferably consists of a sequence of three Manchester II half bits with the value "0".
- the logical value "1" is transmitted
- FIG. 2 shows an example of a flowchart of a
- Embodiment of the method 200 for receiving data via an ICL from a transmitting unit Embodiment of the method 200 for receiving data via an ICL from a transmitting unit.
- step 201 a data packet is received.
- step 202 the validity of the received packet is checked based on the length between a start frame delimiter and a stop frame delimiter of the data packet.
- step 203 a CRC checksum, an address of a memory cell, and a data word are extracted from the data packet.
- step 204 a CRC checksum is calculated from the extracted address of a memory cell and the extracted data word.
- step 205 the calculated CRC checksum is compared with the extracted CRC checksum from the received data packet.
- step 206 the extracted data word is sent to the extracted address of the memory cell in a
- the address of the memory cell of the receiving unit is in this case preferably identical to the address of the memory cell of the transmitting unit.
- FIG. 3 shows by way of example the construction of an embodiment of a transmission unit 300 for transmitting data via an ICL 350 to a reception unit 400.
- the transmission unit 300 has a processor 301.
- the transmission unit 300 further has an integrated data memory 310.
- Processor 301 is configured to identify data to be transferred in a memory cell of data memory 310. Processor 301 is further configured to extract the address of the memory cell and the data word from the identified data. Next is the processor 301
- the processor 301 is further configured to on
- the transmitting unit 300 further comprises a transmitter 302, which is adapted for
- the processor 301 is connected to the transmitter 302 and the
- FIG. 4 shows by way of example the structure of an embodiment of a receiving unit 400 for receiving data via an ICL 350 from a transmitting unit 300.
- Receiving unit 400 has a receiver 401.
- Receiver 401 is arranged to receive a
- the receiving unit 400 has a processor 402 which is set up to check the validity of the received packet on the basis of the length between a start-frame delimiter and a stop-frame delimiter of the
- the processor 402 is further configured to extract a CRC, an address of a memory cell, and a data word from the received data packet.
- the processor 402 is further configured to calculate a CRC from the extracted address of a memory cell and the extracted data word.
- the processor 402 is further
- the receiving unit 400 has in the
- the processor 402 is further configured, the
- the processor 402 is connected to the receiver 401 and the
- Data storage 410 coupled via a data line.
- FIG. 5 shows by way of example the construction of an embodiment of a computing system 500.
- the computing system 500 has, in the illustrated embodiment, a transmission unit 300 as shown and described, for example, in FIG. Via the transmitting unit 300, the computing system 500 in the illustrated embodiment with another
- Computing system 501 connected.
- the further computing system 501 in the illustrated embodiment, has a like For example, in Figure 4 illustrated and described receiving unit 400.
- the first computing system 500 and the second computing system 501 each have a data memory 310 or 410, which are not arranged in the transmission unit 300 or the reception unit 400.
- the data memories 310 and 410 may also be integrated in the transmitting unit 300 or the receiving unit 400, as shown and described in FIGS. 3 and 4, respectively.
- the first computing system 500 and / or the second computing system 501 may have further transmission units 300 or reception units 400.
- the transmitting unit 300 and the receiving unit 400 may each be formed as a combined transmitting and receiving unit (transceiver), so that data between the first
- Computing system 500 and the second computing system 501 can be transmitted in both directions.
- the transmitting unit 300 and the receiving unit 400 can be integrated in a common component or can also be realized by two separate components.
- the first computing system 500 may additionally include a receiving unit 400 for receiving data from the second computing system 501 or one or more other computing systems.
- the second computing system 501 may, for example, additionally comprise one or more transmission units 300 for transferring data to the first computing system 500 or to one or more additional computing systems. The transmission of the data between the first computing system 500 and the second computing system 501 occurs in the
- the signal line 550 includes multiple connections across the data in parallel between the
- Computing system 500 and the second computing system 501 can be transmitted.
- the transmission of the data between the first computing system 500 and the second computing system 501 in a further embodiment not shown, also alternatively via an optical signal line or via a plurality of parallel optical signal lines.
- FIG. 6 shows by way of example an embodiment of a
- Aircraft 600 with a first 601 and a second arithmetic unit 602 shown.
- the aircraft 600 has a first arithmetic unit 610 which has a transmission unit 611 as described and illustrated, for example, in FIG.
- the aircraft 600 has a second arithmetic unit 620 which has a receiving unit 621, as shown and described, for example, in FIG.
- the aircraft 600 further includes a data network 630.
- the first arithmetic unit 610 and the second arithmetic unit 620 are connected to each other via the data network 630.
- Arithmetic unit 610 is designed to transmit data over the data network 630 to the receiving unit 621 of the second arithmetic unit 620.
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Health & Medical Sciences (AREA)
- Bioethics (AREA)
- General Health & Medical Sciences (AREA)
- Computer Hardware Design (AREA)
- Software Systems (AREA)
- Quality & Reliability (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Communication Control (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015004580.6A DE102015004580A1 (de) | 2015-04-14 | 2015-04-14 | Übertragungsverfahren und Vorrichtungen zur Übertragung |
PCT/DE2016/000152 WO2016165683A1 (de) | 2015-04-14 | 2016-04-12 | Ubertragungsverfahren und vorrichtungen zur übertragung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3284193A1 true EP3284193A1 (de) | 2018-02-21 |
Family
ID=55968854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16722522.6A Ceased EP3284193A1 (de) | 2015-04-14 | 2016-04-12 | Ubertragungsverfahren und vorrichtungen zur übertragung |
Country Status (4)
Country | Link |
---|---|
US (1) | US10574392B2 (de) |
EP (1) | EP3284193A1 (de) |
DE (1) | DE102015004580A1 (de) |
WO (1) | WO2016165683A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10432730B1 (en) | 2017-01-25 | 2019-10-01 | United States Of America As Represented By The Secretary Of The Air Force | Apparatus and method for bus protection |
US10296477B2 (en) | 2017-03-30 | 2019-05-21 | United States of America as represented by the Secretary of the AirForce | Data bus logger |
CN114356828B (zh) * | 2021-12-23 | 2024-05-24 | 中国航空工业集团公司西安航空计算技术研究所 | 一种双双余度飞控计算机间异步交叉传输的方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5093910A (en) * | 1986-10-29 | 1992-03-03 | United Technologies Corporation | Serial data transmission between redundant channels |
US6191614B1 (en) * | 1999-04-05 | 2001-02-20 | Xilinx, Inc. | FPGA configuration circuit including bus-based CRC register |
US7342942B1 (en) * | 2001-02-07 | 2008-03-11 | Cortina Systems, Inc. | Multi-service segmentation and reassembly device that maintains only one reassembly context per active output port |
US7082563B2 (en) * | 2003-01-31 | 2006-07-25 | Italtel S.P.A. | Automated method for generating the cyclic redundancy check for transmission of multi-protocol packets |
US6941396B1 (en) * | 2003-02-19 | 2005-09-06 | Istor Networks, Inc. | Storage controller redundancy using bi-directional reflective memory channel |
US7810013B2 (en) * | 2006-06-30 | 2010-10-05 | Intel Corporation | Memory device that reflects back error detection signals |
US8571021B2 (en) * | 2009-06-10 | 2013-10-29 | Microchip Technology Incorporated | Packet based data transmission with reduced data size |
US8335609B2 (en) * | 2010-01-25 | 2012-12-18 | United Technologies Corporation | Method and system for exposing and recording embedded avionics data |
DE102010031282B4 (de) * | 2010-07-13 | 2022-05-12 | Robert Bosch Gmbh | Verfahren zum Überwachen eines Datenspeichers |
US9350385B2 (en) * | 2013-03-15 | 2016-05-24 | Xilinx, Inc. | Modular and scalable cyclic redundancy check computation circuit |
-
2015
- 2015-04-14 DE DE102015004580.6A patent/DE102015004580A1/de not_active Withdrawn
-
2016
- 2016-04-12 EP EP16722522.6A patent/EP3284193A1/de not_active Ceased
- 2016-04-12 WO PCT/DE2016/000152 patent/WO2016165683A1/de active Application Filing
-
2017
- 2017-10-03 US US15/724,150 patent/US10574392B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
US20180048424A1 (en) | 2018-02-15 |
US10574392B2 (en) | 2020-02-25 |
DE102015004580A1 (de) | 2016-10-20 |
WO2016165683A1 (de) | 2016-10-20 |
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