WO2013176309A1 - Architecture de système basée sur une collaboration entre des contrôleurs raid - Google Patents

Architecture de système basée sur une collaboration entre des contrôleurs raid Download PDF

Info

Publication number
WO2013176309A1
WO2013176309A1 PCT/KR2012/004049 KR2012004049W WO2013176309A1 WO 2013176309 A1 WO2013176309 A1 WO 2013176309A1 KR 2012004049 W KR2012004049 W KR 2012004049W WO 2013176309 A1 WO2013176309 A1 WO 2013176309A1
Authority
WO
WIPO (PCT)
Prior art keywords
raid
controller
controllers
switch
request
Prior art date
Application number
PCT/KR2012/004049
Other languages
English (en)
Inventor
Byungcheol Cho
Original Assignee
Taejin Info Tech Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Taejin Info Tech Co., Ltd. filed Critical Taejin Info Tech Co., Ltd.
Priority to PCT/KR2012/004049 priority Critical patent/WO2013176309A1/fr
Publication of WO2013176309A1 publication Critical patent/WO2013176309A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
    • G06F3/061—Improving I/O performance
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
    • G06F3/0658—Controller construction arrangements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/067—Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
    • 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
    • G06F11/1076—Parity data used in redundant arrays of independent storages, e.g. in RAID systems
    • G06F11/108—Parity data distribution in semiconductor storages, e.g. in SSD

Definitions

  • the present invention relates to a semiconductor storage device (SSD) system based on redundant array of independent disks (RAID) controller collaboration. Specifically, the present invention relates to a set of RAID controllers configured to collaborate with each other through dedicated controller-to-controller channels to enable high bandwidth RAID storage.
  • SSD semiconductor storage device
  • RAID redundant array of independent disks
  • Embodiments of the present invention provide a semiconductor storage device (SSD) system based on redundant array of independent disks (RAID) controller collaboration.
  • SSD semiconductor storage device
  • RAID redundant array of independent disks
  • the present invention relates to a set of RAID controllers configured to collaborate with each other through dedicated controller-to-controller channels to enable high bandwidth RAID storage.
  • a first aspect of the present invention provides a semiconductor storage device (SSD) system architecture based on redundant array of independent disks (RAID) controller collaboration, comprising: a controller switch coupled to a host computer; a set of RAID controllers coupled to the controller switch, wherein each of the set of RAID controllers is adapted to collaborate with at least one other RAID controller within the set; and a set of storage drives coupled to each of the set of RAID controllers.
  • SSD semiconductor storage device
  • RAID controllers redundant array of independent disks
  • a second aspect of the present invention provides a method for providing a semiconductor storage device (SSD) system architecture based on redundant array of independent disks (RAID) controller collaboration, comprising: a controller switch coupled to a host computer; a set of RAID controllers coupled to the controller switch, wherein each of the set of RAID controllers is adapted to collaborate with at least one other RAID controller within the set; and a set of storage drives coupled to each of the set of RAID controllers.
  • SSD semiconductor storage device
  • RAID controllers redundant array of independent disks
  • a third aspect of the present invention provides a configurable disk array system for controlling, storing, and retrieving of data in RAID format, comprising: a controller switch coupled to a host computer; a set of RAID controllers coupled to the controller switch, wherein each of the set of RAID controllers is adapted to collaborate with at least one other RAID controller within the set; and a set of storage drives coupled to each of the set of RAID controllers.
  • Fig. 1 is a diagram schematically illustrating a configuration of a RAID controlled storage device of a PCI-Express (PCI-e) type according to an embodiment of the present invention.
  • PCI-e PCI-Express
  • Fig. 2 is a diagram of the hybrid RAID controller of Fig. 1.
  • Fig. 3 is a diagram schematically illustrating a configuration of the highspeed SSD of Fig. 1.
  • Fig. 4 is a diagram schematically illustrating a configuration of a controller unit in Fig. 1.
  • Fig. 5A is a diagram schematically illustrating a configuration of a conventional wide bandwidth RAID.
  • Fig. 5B is a diagram schematically illustrating a configuration of a collaborating wide bandwidth RAID.
  • Fig. 6A is a diagram schematically illustrating a switch enabled to distribute the data load to a set of collaborating RAID controllers.
  • Fig. 6B is a diagram schematically illustrating a switch adapted to intercept and dynamically forward data to enable controller-to-controller communication for wider bandwidth.
  • RAID means redundant array of independent disks (originally redundant array of inexpensive disks).
  • RAID technology is a way of storing the same data in different places (thus, redundantly) on multiple hard disks. By placing data on multiple disks, I/O (input/output) operations can overlap in a balanced way, improving performance. Since multiple disks increase the mean time between failures (MTBF), storing data redundantly also increases fault tolerance.
  • SSD means semiconductor storage device.
  • flash memory means double data rate.
  • HDD means hard disk drive.
  • embodiments of the present invention provide a semiconductor storage device (SSD) system based on redundant array of independent disks (RAID) controller collaboration.
  • SSD semiconductor storage device
  • RAID redundant array of independent disks
  • embodiments of the present invention provide a set (at least one) of RAID controllers coupled to a host system, wherein each of the set of RAID controllers is configured to collaborate with at least one other RAID controller within the set through at least one dedicated controller-to-controller channel to enable high bandwidth RAID storage.
  • Each of the set of RAID controllers controls a set (at least one) of storage drives.
  • the storage device of an I/O standard such as a serial attached small computer system interface (SAS)/serial advanced technology attachment (SATA) type supports a low-speed data processing speed for a host by adjusting synchronization of a data signal transmitted/received between the host and a memory disk during data communications between the host and the memory disk through a PCI-Express interface, and simultaneously supports a high-speed data processing speed for the memory disk, thereby supporting the performance of the memory to enable high-speed data processing in an existing interface environment at the maximum.
  • SAS serial attached small computer system interface
  • SATA serial advanced technology attachment
  • FIG. 1 a diagram schematically illustrating a configuration of a PCI-Express type, RAID controlled storage device (e.g., for providing storage for a serially attached computer device) according to an embodiment of the invention is shown. As depicted, Fig.
  • FIG. 1 shows a RAID controlled PCI-Express type storage device according to an embodiment of the invention which includes a memory disk unit 100 comprising: a plurality of memory disks having a plurality of volatile semiconductor memories (also referred to herein as high-speed SSDs 100); a RAID controller 800 coupled to SSDs 100; an interface unit 200 (e.g., PCI-Express host) which interfaces between the memory disk unit and a host; a controller unit 300; an auxiliary power source unit 400 that is charged to maintain a predetermined power using the power transferred from the host through the PCI-Express host interface unit; a power source control unit 500 that supplies the power transferred from the host through the PCI-Express host interface unit to the controller unit, the memory disk unit, the backup storage unit, and the backup control unit which, when the power transferred from the host through the PCI-Express host interface unit is blocked or an error occurs in the power transferred from the host, receives power from the auxiliary power source unit and supplies the power to the memory disk unit through the controller unit; a
  • the memory disk unit 100 includes a plurality of memory disks provided with a plurality of volatile semiconductor memories for high-speed data input/output (for example, flash memory, flash memory2, flash memory3, SDRAM, and the like), and inputs and outputs data according to the control of the controller 300.
  • the memory disk unit 100 may have a configuration in which the memory disks are arrayed in parallel.
  • the PCI-Express host interface unit 200 interfaces between a host and the memory disk unit 100.
  • the host may be a computer system or the like, which is provided with a PCI-Express interface and a power source supply device.
  • the controller unit 300 adjusts synchronization of data signals transmitted/received between the PCI-Express host interface unit 200 and the memory disk unit 100 to control a data transmission/reception speed between the PCI-Express host interface unit 200 and the memory disk unit 100.
  • a PCI-e type RAID controller 800 can be directly coupled to any quantity of SSDs 100. Among other things, this allows for optimum control of SSDs 100. Among other things, the use of a RAID controller 800:
  • the internal backup controller determines the backup (user's request order or the status monitor detects power supply problems);
  • the internal backup controller requests a data backup to SSDs
  • the internal backup controller determines the restore (user's request order or the status monitor detects power supply problems);
  • the internal backup controller requests a data restore to the SSDs
  • hybrid RAID controller 800 generally comprises: a host interface 820; a disk controller 830 coupled to host interface 820; and a high-speed host interface 840. Also coupled to disk controller 830 is a first disk monitoring unit 860A, which is coupled to the first disk mount 850A.
  • SSD memory disk units 100 are mounted on first disk mount 850A and are detected by first disk monitoring unit 860A.
  • a second disk monitoring unit 860B which is coupled to a second disk mount 850B.
  • HDD/Flash memory units 110 are mounted on second disk mount 850B and are detected by second disk monitoring unit 860B.
  • Disk plug and play (PnP controller 870) controls the functions and/or detection functions related to first disk mount 850A and second disk mount 850B.
  • hybrid RAID controller 800 controls the operation of SSD memory disk units 100 and HDD/Flash memory units 110. This includes the detection of SSD memory disk units 100 and HDD/Flash memory units 110, the storage and retrieval of data therefrom, etc.
  • SSD/memory disk unit 100 comprises: a host interface 202 (e.g., PCI-Express host) (which can be interface 200 of Fig. 1, or a separate interface as shown); a DMA controller 302 interfacing with a backup control module 700; an ECC controller 304; and a memory controller 306 for controlling one or more blocks 604 of memory 602 that are used as high-speed storage.
  • a host interface 202 e.g., PCI-Express host
  • DMA controller 302 interfacing with a backup control module 700
  • ECC controller 304 e.g., ECC controller 304
  • memory controller 306 for controlling one or more blocks 604 of memory 602 that are used as high-speed storage.
  • the controller unit 300 of Fig. 1 is shown as comprising: a memory control module 310 which controls data input/output of the SSD memory disk unit 100; a DMA control module 320 which controls the memory control module 310 to store the data in the SSD memory disk unit 100, or reads data from the SSD memory disk unit 100 to provide the data to the host, according to an instruction from the host received through the PCI-Express host interface unit 200; a buffer 330 which buffers data according to the control of the DMA control module 320; a synchronization control module 340 which, when receiving a data signal corresponding to the data read from the SSD memory disk unit 100 by the control of the DMA control module 320 through the DMA control module 320 and the memory control module 310, adjusts synchronization of a data signal so as to have a communication speed corresponding to a PCI-Express communications protocol to transmit the synchronized data signal to the PCI-Express host interface unit 200, and when receiving a data signal from the host through the PCI
  • the high-speed interface module 350 includes a buffer having a double buffer structure and a buffer having a circular queue structure, and processes the data transmitted/received between the synchronization control module 340 and the DMA control module 320 without loss at high speed by buffering the data and adjusting data clocks .
  • Fig. 5A is a diagram schematically illustrating a configuration of a conventional wide bandwidth RAID.
  • RAID is a technology that employs the simultaneous use of multiple storage drives to achieve greater levels of performance, reliability, and/or larger data volume sizes. This is achieved by presenting multiple hard drives as a single storage volume which simplifies storage management.
  • host RAID software 402 is utilized by controller switch 406 via interface 404.
  • I/O (input/output) controller 412 is coupled to switch 406 via interface 408.
  • I/O controller 414 is coupled to switch 406 via interface 410.
  • Drives 416 are coupled to I/O controller 412.
  • Drives 418 are coupled to I/O controller 414.
  • Software-based RAID implementations are either operating system-based, or they are application programs that run on the server. All array operations and management functions are controlled by the array software running on the host. Software-based RAID implementations require custom design which adds costs and complexity. Furthermore, softwarebased RAID lacks reliability, occupies host system memory, consumes central processing unit (CPU) cycles, and is operating system dependent. The performance of a software-based array is directly dependent on server CPU performance and load.
  • Fig. 5B is a diagram schematically illustrating a configuration of a collaborating wide bandwidth RAID. Unlike a software-based array, a hardware-based array is implemented directly on a host-based RAID adapter and tightly couples the array functions with the disk interface. Hardware arrays do not occupy any host system memory, nor are they operating system dependent.
  • controller switch 422 is coupled to host 420. Multiple RAID controllers are used to manage sufficient system I/O bandwidth.
  • RAID controller 424 is coupled to switch 422.
  • RAID controller 426 is coupled to switch 422.
  • Drives 430 are coupled to RAID controller 424.
  • Drives 432 are coupled to RAID controller 426.
  • Fast solid-stage disk storage systems require a high-bandwidth channel to host to take advantage of SSD performance.
  • RAID controller 424 and RAID controller 426 communicate with each other through dedicated controller-to-controller channel (C2C) 428 to enable system-wide RAID.
  • Host 420 sees RAID controller array as a single
  • Fig. 6A is a diagram schematically illustrating a switch enabled to distribute the data load to a set of collaborating RAID controllers.
  • Control switch 442 is coupled to host computer 440.
  • RAID controller 444 is coupled to switch 442.
  • RAID controller 446 is coupled to switch 442.
  • Drives 450 are coupled to RAID controller 444.
  • Drives 452 are coupled to RAID controller 446.
  • C2C channel 448 allows the two RAID controllers to communicate with one another.
  • Fig. 6A is a more detailed view of the communications among switch 442 and RAID controllers 444, 446.
  • Host computer 440 sees multiple RAID controllers as one controller because of switch 442.
  • Switch 442 distributes the load to the different controllers.
  • the RAID controllers communicate with each other through dedicated controller-to-controller channel 448 for extended RAID operation. For example, if RAID controller 444 is required to communicate with RAID controller 446 to retrieve a piece of data housed in drives 452, RAID controller 446 returns the result to switch 442 directly or return through the original controller (RAID controller 444).
  • Fig. 6B is a diagram schematically illustrating a switch adapted to intercept and dynamically forward data to enable controller-to-controller communication for wider bandwidth.
  • control switch 462 is coupled to host computer 460.
  • RAID controller 464 is coupled to switch 462.
  • RAID controller 466 is coupled to switch 462.
  • Drives 468 are coupled to RAID controller 464.
  • Drives 470 are coupled to RAID controller 466.
  • Switch 462 can selectively intercept and dynamically forward data to enable controller-to-controller communication for wider bandwidth.
  • switch 462 acts as the communication bridge between the controllers, rather than having communications between controllers through a C2C channel as previously discussed.
  • Switch 462 takes on this functionality when RAID controller to RAID controller communication channel bandwidth is narrow or non-existent.
  • the hot-spare is brought to a RAID controller and all RAID information has to be redistributed due to recovery and disk rebuilding activities.
  • Such activity requires vast amounts of data transaction between disks and RAID controllers, while the entire RAID system becomes less responsive due to the rebuilding effort. In this case, a portion of channel bandwidth to the host will be used temporarily.
  • auxiliary power source unit 400 may be configured as a rechargeable battery or the like, so that it is normally charged to maintain a predetermined power using power transferred from the host through the PCI-Express host interface unit 200 and supplies the charged power to the power source control unit 500 according to the control of the power source control unit 500.
  • the power source control unit 500 supplies the power transferred from the host through the PCI-Express host interface unit 200 to the controller unit 300, the memory disk unit 100, the backup storage unit 600, and the backup control unit 700.
  • the power source control unit 500 receives power from the auxiliary power source unit 400 and supplies the power to the memory disk unit 100 through the controller unit 300.
  • the backup storage unit 600A-B is configured as a low-speed non-volatile storage device such as a hard disk and stores data of the memory disk unit 100.
  • the backup control unit 700 backs up data stored in the memory disk unit 100 in the backup storage unit 600A-B by controlling the data input/output of the backup storage unit 600A-B and backs up the data stored in the memory disk unit 100 in the backup storage unit 600A-B according to an instruction from the host, or when an error occurs in the power source of the host due to a deviation of the power transmitted from the host deviates from the threshold value.
  • the present invention supports a low-speed data processing speed for a host by adjusting synchronization of a data signal transmitted/received between the host and a memory disk during data communications between the host and the memory disk through a PCI-Express interface and simultaneously supports a high-speed data processing speed for the memory disk, thereby supporting the performance of the memory to enable high-speed data processing in an existing interface environment at the maximum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Sources (AREA)

Abstract

Des modes de réalisation de la présente invention concernent une architecture de système d'un dispositif de stockage à semi-conducteurs (SSD) basée sur une collaboration entre des contrôleurs pour matrices redondantes de disques indépendants (RAID). Pour être plus précis, des modes de réalisation de la présente invention concernent un ensemble d'au moins un contrôleur RAID couplé à un système hôte, chaque contrôleur de l'ensemble de contrôleurs RAID étant conçu pour collaborer avec au moins un autre contrôleur RAID dans l'ensemble par l'intermédiaire d'au moins un canal dédié de contrôleur à contrôleur de manière à permettre un stockage RAID à haut débit.
PCT/KR2012/004049 2012-05-23 2012-05-23 Architecture de système basée sur une collaboration entre des contrôleurs raid WO2013176309A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2012/004049 WO2013176309A1 (fr) 2012-05-23 2012-05-23 Architecture de système basée sur une collaboration entre des contrôleurs raid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2012/004049 WO2013176309A1 (fr) 2012-05-23 2012-05-23 Architecture de système basée sur une collaboration entre des contrôleurs raid

Publications (1)

Publication Number Publication Date
WO2013176309A1 true WO2013176309A1 (fr) 2013-11-28

Family

ID=49623980

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2012/004049 WO2013176309A1 (fr) 2012-05-23 2012-05-23 Architecture de système basée sur une collaboration entre des contrôleurs raid

Country Status (1)

Country Link
WO (1) WO2013176309A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100472207B1 (ko) * 2002-12-23 2005-03-10 한국전자통신연구원 다중 레이드 제어기를 통한 데이터 분산 공유 레이드 제어시스템
US7152142B1 (en) * 2002-10-25 2006-12-19 Copan Systems, Inc. Method for a workload-adaptive high performance storage system with data protection
US20100262775A1 (en) * 2007-12-27 2010-10-14 Fujitsu Limited Raid control apparatus and raid system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7152142B1 (en) * 2002-10-25 2006-12-19 Copan Systems, Inc. Method for a workload-adaptive high performance storage system with data protection
KR100472207B1 (ko) * 2002-12-23 2005-03-10 한국전자통신연구원 다중 레이드 제어기를 통한 데이터 분산 공유 레이드 제어시스템
US20100262775A1 (en) * 2007-12-27 2010-10-14 Fujitsu Limited Raid control apparatus and raid system

Similar Documents

Publication Publication Date Title
WO2012169824A2 (fr) Contrôleur raid avec interface programmable pour un dispositif de stockage à semi-conducteurs
WO2012036470A2 (fr) Contrôleur raid hybride ayant une commutation de bus pci multiples
WO2012108739A9 (fr) Sauvegarde et restauration à base d'alarme pour dispositif de stockage à semi-conducteurs
WO2012105811A2 (fr) Organe de contrôle de stockage basé sur raid
WO2011132922A2 (fr) Contrôleur raid pour une unité de mémorisation semi-conductrice et son procédé de production
WO2012011709A2 (fr) Système de stockage hybride pour architecture raid multi-niveaux
WO2011136607A2 (fr) Système et procédé pour la sauvegarde et la restauration pour un dispositif mémoire semi-conducteur
WO2012177057A2 (fr) Système d'antémémoire à haute vitesse basé sur un dispositif de stockage à semi-conducteurs
WO2011155738A9 (fr) Système de stockage hybride à fond de panier central et son procédé de production
WO2011132923A2 (fr) Dispositif semi-conducteur de commande raid et son procédé de fabrication
WO2012099434A2 (fr) Unité de disque de mémoire de dispositif de stockage à semi-conducteur à base de sas
WO2013051860A1 (fr) Système de cache sensible au contexte de stockage et de mémoire hybride et dynamique inter-frontière
WO2012105812A2 (fr) Organe de contrôle de stockage basé sur raid présentant un contrôleur d'interface fibre channel
WO2012018216A2 (fr) Contrôleur raid hybride
WO2011142560A2 (fr) Système de stockage hybride destiné à une architecture raid à plusieurs niveaux
WO2011155739A2 (fr) Système de stockage hybride basé sur commutateurs et procédé pour la fourniture d'un tel système
WO2012018217A2 (fr) Contrôleur raid ayant une commutation entre multiples bus pci
WO2013027997A2 (fr) Contrôleur raid à fonctionnalité réseau pour dispositif de mémoire à semi-conducteurs
WO2013005995A2 (fr) Système à base de dispositif mémoire à semi-conducteurs (ssd) commandé par réseau redondant de disques indépendants (raid) ayant une interface hôte non-volatile haut débit
WO2012169825A2 (fr) Contrôleur raid à deux voies pour un dispositif de stockage à semi-conducteurs
WO2013066042A1 (fr) Décalage de données asynchrones et sauvegarde entre des sources de données asymétriques
WO2012177056A2 (fr) Contrôleur raid bidirectionnel avec interface hôte programmable pour un dispositif de stockage à semi-conducteurs
WO2012138109A2 (fr) Cache adaptatif pour système à base de dispositif de stockage à semi-conducteur
WO2011155740A2 (fr) Gestionnaire de mémoire cache basé sur un dispositif de stockage à semi-conducteurs et son procédé de fabrication
WO2013176309A1 (fr) Architecture de système basée sur une collaboration entre des contrôleurs raid

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12877331

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12877331

Country of ref document: EP

Kind code of ref document: A1