EP4338438A1 - Verfahren zum senden von fahrzeug-zu-x-nachrichten, fahrzeug-zu-x-kommunikationseinheit oder telematikeinheit und speichermedium - Google Patents
Verfahren zum senden von fahrzeug-zu-x-nachrichten, fahrzeug-zu-x-kommunikationseinheit oder telematikeinheit und speichermediumInfo
- Publication number
- EP4338438A1 EP4338438A1 EP22724415.9A EP22724415A EP4338438A1 EP 4338438 A1 EP4338438 A1 EP 4338438A1 EP 22724415 A EP22724415 A EP 22724415A EP 4338438 A1 EP4338438 A1 EP 4338438A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- messages
- air interface
- vehicle
- priority
- area status
- 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 45
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000007613 environmental effect Effects 0.000 claims description 3
- 230000001413 cellular effect Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009365 direct transmission Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- GVVPGTZRZFNKDS-JXMROGBWSA-N geranyl diphosphate Chemical compound CC(C)=CCC\C(C)=C\CO[P@](O)(=O)OP(O)(O)=O GVVPGTZRZFNKDS-JXMROGBWSA-N 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/02—Selection of wireless resources by user or terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Definitions
- the invention relates to a method for sending vehicle-to-X messages via a first air interface and a second air interface, a vehicle-to-X communication unit or a telematics unit and an associated storage medium.
- Vehicle-to-X communication is typically used to exchange messages between vehicles or between vehicles and infrastructure.
- the exchange can take place both locally between vehicles and via infrastructure.
- the invention relates to a method for sending vehicle-to-X messages via a first air interface and a second air interface.
- the first air interface provides local direct messaging between vehicles.
- the second air interface provides messaging over an external infrastructure.
- First priority messages 2 is always sent via the first air interface and the second air interface. Messages with a second priority are always sent over the first air interface and are only sent over the second air interface in each case if an area status has a first value.
- the method according to the invention can be used to prioritize messages, with first-priority messages always being sent over both air interfaces and second-priority messages only being sent over the second air interface if an area status indicates a need to do so.
- the air interfaces are typically interfaces that enable communication with other units. In particular, this can be done via radio communication. Alternatively, communication via sound or other physical transmission options such as light or infrared radiation is also possible, particularly but not exclusively, for the first air interface.
- the first air interface typically enables communication between vehicles without further units, in particular stationary units, being involved.
- communication via the second air interface on the other hand, communication takes place via an external infrastructure which is made available on the road side and can also enable communication with other infrastructure and with other vehicles, for example. In particular, this infrastructure can also forward messages to other vehicles. In particular, it is external to the vehicle under consideration here.
- First priority messages are typically particularly important and are therefore always sent over both air interfaces.
- Messages of the second priority are typically less important, for example, in contrast to the first messages, they do not indicate immediate sources of danger, but they do share data such as a vehicle position.
- Transmission via the first air interface can typically be regarded as non-critical with regard to channel occupancy, since vehicles can communicate with one another in almost any way 3 can communicate.
- transmission via the second air interface is expediently only carried out when the area status has a first value, which significantly reduces the resource load on the infrastructure.
- the area status can thus specify whether or not the second-priority messages are sent via the second air interface.
- the first value of the area status indicates that transmission should also take place via the second air interface. It is used in particular to differentiate from a possible second value of the area status, which is independent of how the area status is implemented. For example, it can be implemented as a flag or an entry in a memory or register.
- the second air interface can in particular be designed as an interface to an external infrastructure in the form of a mobile radio network.
- a mobile radio network can typically take over the transmission of messages between vehicles and also between vehicles and fixed units.
- the second air interface can also be based on sound transmission, for example.
- hazard warnings, emergency signal messages and/or Decentralized Environmental Notification Messages are messages of the first priority. These are messages that are intended to warn of an imminent danger and should therefore be distributed as widely as possible, whereby the resource load is irrelevant in this case.
- DENMs can be designed, for example, as described in the ETSI EN 302 637-3 V1.2.1 standard.
- status messages, position information, speed information, heading information and/or Cooperative Awareness Messages are second priority messages.
- CAMs can be designed as described in the standard EN 302 637-2 - V1.3.0.
- Such messages typically provide information about the general traffic situation, in particular about the vehicle position, without warning of a specific danger. Therefore you can 4 in the event that transmission via the second air interface is not necessary, can only be transmitted via the first air interface, which significantly reduces the load on the infrastructure.
- the area status can be found in particular on an electronic map.
- the area status can be stored in this so that vehicles can access it.
- the electronic map can be created based on local propagation conditions for the message transmission. For example, radio fields and sound springs can be taken into account.
- the electronic map can thus in particular have been created once and can thus be used for a large number of vehicles. For example, it can be created based on geodesics and/or measurements.
- the electronic card is stored in the vehicle that sends the messages.
- the vehicle carries its own electronic card.
- the electronic card is stored in a central unit with which communication takes place via the second air interface. This allows the electronic map to be made available centrally, in particular for a number of vehicles at the same time.
- the map may contain area statuses, one or more area statuses for areas or points along roads, for individual points and/or for sets of points.
- a single point can designate a parking lot or another object, for example.
- a respective area status is typically assigned to each point.
- the map can be divided into sectors or points, for each of which an area status is defined.
- each territory status can have a first value or a second value.
- a new area status will be announced at a minimum distance of 1m, 2m, 5m, 10m, or 20m and/or a maximum distance of 2m, 5m, 10m, 20m, or 30m.
- a radio prediction model can output radio predictions on sets of points, where the sets of points are, for example, in the form of corners of a 5
- Hexagon or other geometric figure may be present.
- Sets of points can, for example, represent road sections.
- the map is typically specified for points on the earth's surface, but can also be specified for points at a predetermined height of, for example, 1.6 m (corresponding to a typical car roof) or 10 m (disconnected from the dimensions of a vehicle).
- position information can be sent periodically via the second air interface, and an area status can be obtained.
- an area status can be obtained in response to or as a response to the sending of position information, it being possible to access the centrally stored electronic map already mentioned, for example.
- the second priority messages are not sent over the second air interface when the area status has a second value.
- the second value can be used to specify that a transmission of second-priority messages via the second air interface is deactivated.
- the area status can be received, at least partially or completely, via the second air interface. This can also be done without prior transmission of the position.
- a central unit which tracks vehicles in a suitable manner, for example, can make the area status available without being asked and thereby support vehicles.
- the area status can also be passed on from vehicle to vehicle via the first air interface and/or can be received at least partially or completely via the first air interface. This can also take place repeatedly over several vehicles. This forwarding can also take place in a mixed form via the first and the second air interface. 6
- the method can be carried out in particular by a telematics unit of a motor vehicle. This has proven to be a beneficial integration.
- the telematics unit can, for example, also perform other communication functions such as communication with fleet monitoring or toll systems.
- the invention further relates to a vehicle-to-X communication unit or a telematics unit configured to carry out a method as described herein.
- the invention further relates to a non-transitory computer-readable storage medium, which contains program code, upon the execution of which a processor carries out a method as described herein. With regard to the method, all of the versions and variants described herein can be used.
- LTE-PC5 vehicle-to-vehicle
- LTE-Uu mobile network
- These vehicles can, for example, communicate with a portal (back-end server) via Uu.
- the portal can create a database with forecast coverage areas for LTE-PC5 in advance.
- the supply areas can be laid out across the board for grid points, for example at a distance of 20 m. However, the supply areas can also only be created along roads at a distance of 20 m, for example, which reduces the effort involved in creating the database and also reduces the memory size.
- LTE-PC5 and LTE-Uu can in particular be designed according to the following specification:
- the vehicles with the combined system always send CAM and DENM messages via LTE-PC5. They send, for example, at a distance 7 out of 10 s also position and speed data via the mobile network to the portal.
- the basic data load corresponding to these messages is small in the entire mobile network and significantly smaller than a basic data load that would correspond to CAM messages at intervals of seconds or even tenths of a second via Uu and that would arise in the "naive" parallel operation of LTE-PC5 and Uu.
- the portal can then determine the grid point near which the vehicle in question is located. Accordingly, the portal can determine the associated coverage area for LTE-PC5 for the vehicle at this grid point by reading the database specified above.
- the portal then informs the vehicle whether the vehicle should also send a CAM message via Uu in parallel to the CAM message already sent via LTE-PC5 or not.
- the portal therefore communicates a Uu flag with the value "true” or "false” to the vehicle.
- the Uu flag can also be sent spontaneously from the portal.
- the portal therefore does not have to respond to the vehicle's position report as a reply message.
- the sending of the Uu flag does not therefore have to be linked to the vehicle's position report.
- the procedure only affects CAM messages.
- DENM messages should typically always be sent in parallel via LTE-PC5 and Uu, because the associated basic data load via Uu is negligible compared to the position messages that are generated via Uu anyway.
- the portal can also generate DENMs and send them via Uu to combined system vehicles.
- the method has the particular advantage that vehicles with a combined system that are in a dead spot with respect to LTE-PC5 can still inform other vehicles with a combined system via the mobile network Uu.
- the basic data load in the mobile network is significantly reduced.
- the basic idea can basically be used in all radio applications and in general message applications that communicate via several communication paths and for which the saving of data volume is relevant.
- FIG. 1 shows an arrangement with two vehicles and infrastructure for carrying out a method according to the invention.
- the first vehicle 10 has a first air interface 11 for vehicle-to-X communication and a second air interface 12 for vehicle-to-X communication.
- the second vehicle 20 accordingly has a first air interface 21 for vehicle-to-X communication and a second air interface 22 for vehicle-to-X communication.
- Each of the vehicles has an antenna 14, 24 for vehicle-to-X communication, which is used by the two air interfaces 21, 22.
- the respective first air interface 11, 21 and the respective second air interface 12, 22 together form a respective vehicle-to-X communication unit 15, 25.
- a stationary air interface 30 with an antenna 35 is arranged next to the road 5, which establishes a connection to a mobile radio network. In particular, it thereby also establishes a connection to a central unit 40, which can therefore in principle also be accessed from the two vehicles 10, 20.
- the fixed air interface 30, the antenna 35 and the central unit 40 together form an external infrastructure 50.
- the two vehicles 10, 20 send position information at regular intervals via the stationary air interface 30 to the central unit 40.
- the two vehicles 10, 20 operate vehicle-to-X communication and also send out messages. Basically, messages of a first 9
- Priority in particular hazard warnings or Decentralized Environmental Notification Messages (DENMs), basically sent out over both air interfaces 11, 12, 21, 22.
- Messages with a second priority for example Cooperative Awareness Messages (CAMs), are always sent out via the first air interface 11 .
- CAMs Cooperative Awareness Messages
- the respective first air interface 11, 21 basically ensures direct communication between the vehicles 10, 20, without the need for additional intermediaries as a rule.
- the respective second air interface 12, 22 basically represents a connection to the stationary air interface 30 and thus to the mobile radio network already mentioned. In principle, this also enables access to the central unit 40.
- second-priority messages are only sent via the second air interface 12, 22 if the area status received from the central unit 40 has a first value. This indicates that a poor propagation condition for direct transmission of vehicle-to-X messages between vehicles 10,20 locally exists. If, on the other hand, the area status has a second value, no such transmission takes place via the second air interface 12, 22, because good direct message transmission between the vehicles 10, 20 can be assumed.
- vehicle-to-X communication is understood here to mean both direct communication and indirect communication between vehicles and/or between vehicles and infrastructure facilities.
- it can be about 10
- vehicle-to-infrastructure communication If reference is made to communication between vehicles in the context of this application, this can in principle take place, for example, in the context of vehicle-to-vehicle communication, which typically takes place without mediation through a mobile network or a similar external infrastructure and which is therefore different from other solutions , which are based, for example, on a cellular network.
- vehicle-to-X communication can be accomplished using the IEEE 802.11p or IEEE 1609.4 standards.
- Vehicle-to-X communication can also be referred to as C2X communication.
- the sub-areas can be referred to as C2C (Car-to-Car) or C2I (Car-to-Infrastructure).
- C2C Car-to-Car
- C2I Car-to-Infrastructure
- steps of the method according to the invention can be carried out in the order given. However, they can also be executed in a different order, as far as this is technically reasonable.
- the method according to the invention can be carried out in such a way that no further steps are carried out. In principle, however, further steps can also be carried out, including those which are not mentioned.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Traffic Control Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021204853.6A DE102021204853B4 (de) | 2021-05-12 | 2021-05-12 | Verfahren zum Senden von Fahrzeug-zu-X-Nachrichten, Fahrzeug-zu-X-Kommunikationseinheit oder Telematikeinheit und Speichermedium |
PCT/DE2022/200094 WO2022237940A1 (de) | 2021-05-12 | 2022-05-10 | Verfahren zum senden von fahrzeug-zu-x-nachrichten, fahrzeug-zu-x-kommunikationseinheit oder telematikeinheit und speichermedium |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4338438A1 true EP4338438A1 (de) | 2024-03-20 |
Family
ID=81749354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22724415.9A Pending EP4338438A1 (de) | 2021-05-12 | 2022-05-10 | Verfahren zum senden von fahrzeug-zu-x-nachrichten, fahrzeug-zu-x-kommunikationseinheit oder telematikeinheit und speichermedium |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4338438A1 (de) |
DE (1) | DE102021204853B4 (de) |
WO (1) | WO2022237940A1 (de) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012218172A1 (de) | 2012-01-06 | 2013-07-11 | Continental Teves Ag & Co. Ohg | Verfahren zur Erkennung redundant empfangener Informationen, Fahrzeug-zu-X-Kommunikationssystem und Verwendung des Systems |
DE102013215728A1 (de) * | 2013-03-26 | 2014-10-02 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren und Vorrichtung zur Auswahl eines Funkübertragungskanals in einem Funksystem |
DE102015214968B4 (de) | 2015-08-05 | 2022-10-06 | Volkswagen Aktiengesellschaft | Verfahren und Vorrichtung zur Anpassung mindestens eines Parameters eines Kommunikationssystems |
WO2017171906A1 (en) * | 2016-03-28 | 2017-10-05 | Intel IP Corporation | Systems and methods for centralized and decentralized communication modes for v2x services |
-
2021
- 2021-05-12 DE DE102021204853.6A patent/DE102021204853B4/de active Active
-
2022
- 2022-05-10 EP EP22724415.9A patent/EP4338438A1/de active Pending
- 2022-05-10 WO PCT/DE2022/200094 patent/WO2022237940A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
DE102021204853A1 (de) | 2022-11-17 |
DE102021204853B4 (de) | 2024-08-01 |
WO2022237940A1 (de) | 2022-11-17 |
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