WO2020037546A1 - Procédé de gestion intelligente de réseau à fibres optiques et système de gestion - Google Patents

Procédé de gestion intelligente de réseau à fibres optiques et système de gestion Download PDF

Info

Publication number
WO2020037546A1
WO2020037546A1 PCT/CN2018/101728 CN2018101728W WO2020037546A1 WO 2020037546 A1 WO2020037546 A1 WO 2020037546A1 CN 2018101728 W CN2018101728 W CN 2018101728W WO 2020037546 A1 WO2020037546 A1 WO 2020037546A1
Authority
WO
WIPO (PCT)
Prior art keywords
information
optical port
optical
optical fiber
picture
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
Application number
PCT/CN2018/101728
Other languages
English (en)
Chinese (zh)
Inventor
吕根良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Xiudea Communication Technology Co Ltd
Original Assignee
Nanjing Xiudea Communication Technology 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 Nanjing Xiudea Communication Technology Co Ltd filed Critical Nanjing Xiudea Communication Technology Co Ltd
Priority to PCT/CN2018/101728 priority Critical patent/WO2020037546A1/fr
Priority to CN201880096752.9A priority patent/CN112654975B/zh
Publication of WO2020037546A1 publication Critical patent/WO2020037546A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G06COMPUTING OR CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/21Design, administration or maintenance of databases

Definitions

  • the invention relates to a management method and a management system for an optical fiber communication system, in particular to an intelligent management method and a management system for an optical fiber network optical fiber.
  • Paper labels are bundled on the optical fiber connector.
  • the connector's business type, optical path code, local optical port position, opposite optical port position, and Information such as length, paper labels have become the basis for differentiating and judging lines for optical fiber line management, and have become an indispensable part of fiber jump management in computer rooms. How to realize the rapid entry and identification of paper labels, and the use of information related to computer room information management. Success or failure.
  • the paper label on the optical port in the telecommunications room is printed and handwritten. Because the on-site optical port routing is manually jumped, the paper label is made, and then it is recorded and delivered by a special person to upload the resource management system. The construction staff's writing is not standardized, and the uploaded data cannot be identified. After years of deposition, the inconsistency rate between the on-site optical port routing information and the routing information of the resource management system is as high as 40% or more. Network troubleshooting requires construction personnel who are familiar with the operation of the machine room. The long troubleshooting time is in serious conflict with increasing network maintenance requirements.
  • the technical problem to be solved by the present invention is to address the above-mentioned shortcomings of the prior art, and to provide an optical fiber intelligent management method and management system for an optical fiber network.
  • the present invention provides a method for intelligent management of an optical fiber network, which includes the following steps:
  • the information about the optical fiber routing port includes:
  • Optical port coding optical path coding, leased line number, business name, distance between upstream and downstream optical ports, connection point line and end face loss, loss change history, jumper and change records, operator information, location address information, and connected device information And history records, time node information, routing information, fault records.
  • the location address information includes, but is not limited to, GPS address information and / or corresponding position coordinates of a paper label on a connector of the optical fiber routing port on an optical fiber distribution frame in a computer room.
  • the method further includes a step of identifying the newly uploaded optical port information by searching and comparing, further including:
  • optical fiber network intelligent management method wherein:
  • the imprint identification includes:
  • the track identification is to process the handwriting on the picture information in the newly uploaded optical port information as a single pixel, and perform track comparison.
  • the above-mentioned intelligent management method for the optical fiber network wherein the screening identification includes word number identification, line number identification, and overprint identification.
  • the method when the paper label takes a picture and collects a picture, the method further includes marking at least two positioning points on the paper label to facilitate positioning and correction during image processing.
  • the method when processing the picture to generate picture information, the method further includes enhancing and sharpening the picture, and correcting a boundary of the picture according to the positioning point.
  • the present invention further provides an optical fiber network intelligent management system, in which the above-mentioned optical fiber network intelligent management method is used to manage an optical fiber distribution frame in a computer room, and the intelligent management system includes:
  • Intelligent terminal used for information collection, identification, and supplementary correction of fiber routing ports. It collects pictures by taking pictures of paper labels on the connectors of all fiber routing ports in the equipment room, and generates picture information after processing each of the pictures. Combining the picture information and the information of the optical fiber routing port corresponding to the picture information to generate optical port information, and sending the optical port information; and
  • a background server or cloud server is connected to the smart terminal, and is configured to receive the optical port information uploaded by the smart terminal and generate an optical port information label database, and update the optical port information label database in time.
  • optical port information in the database in addition to textual representation, adds image record information and historical record information storage;
  • the optical port locator on the distribution frame where the paper label is located can be activated in reverse through the optical port code, and the corresponding paper label can be quickly found through sound and light prompts.
  • FIG. 1 is a flowchart of an intelligent management method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a working process according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a working process of another embodiment of the present invention.
  • the paper label is not associated with background information such as the optical port code, connection point line and endface loss information, location address, and connected equipment, and there is no historical information record of the optical port;
  • FIG. 1 is a flowchart of an intelligent management method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a working process according to an embodiment of the present invention.
  • the optical fiber network intelligent management method of the present invention includes the following steps:
  • step S100 the information is collected, and the smart terminal is used to take pictures of the paper tags on the connectors of all optical fiber routing ports in the computer room to collect pictures; wherein when the paper tags are used to take pictures, the pictures may be first taken on the paper tags.
  • Step S200 picture processing, generating picture information after processing each of the pictures, and further enhancing and sharpening the pictures, and correcting the boundaries of the pictures according to the positioning points;
  • Step S300 Information synthesis, combining the picture information and the information of the optical fiber routing port corresponding to the picture information to generate optical port information;
  • the information of the optical fiber routing port includes: optical port coding, optical path coding, Dedicated line number, business name, distance between upstream and downstream optical ports, connection point line and end face loss information, loss change history, jumper and change records, operator information, location address information, connected device information and history records, time nodes Information, routing information, and / or fault records;
  • the location address information may include machine room address information, GPS address information, and / or the corresponding position of the paper label on the connector of the fiber optic routing port on the fiber optic distribution frame in the machine room coordinate;
  • Step S400 upload information, upload the optical port information to a background server or a cloud server.
  • Step S500 Establish a database. After receiving the optical port information, the background server or cloud server generates an optical port information label database.
  • the method when establishing the database in step S500, the method further includes a step of identifying the newly uploaded optical port information by searching and comparing, further including:
  • Step S501 Determine the glyphs in the picture information in the newly uploaded optical port information, and distinguish them into a printed body, a handwritten body, or a mixed body;
  • Step S502 If it is a printed body, the content can be directly identified by OCR and searched and compared with the picture information in the existing optical port information in the optical port information tag database, which is provided by Facebook Cloud or Tencent Cloud. Recognition function, if the comparison result is uncertain, or if more than two approximate pictures are found, you can finally confirm it by manual comparison;
  • Step S503 If it is handwritten, there will be a lot of errors in cloud recognition in general. The reason is that the writing is too scribbled and not standardized. Then you can identify the content through track recognition, overprint recognition or screening recognition, and tag it with the optical port information. Find and compare the picture information in the existing optical port information in the database; wherein the overprinting identification includes: setting the picture information in the newly uploaded optical port information as a sub-tag, and setting the optical port The picture information in the optical port information in the information tag database is set as the mother tag, and the child tags are scaled to be the same size as the mother tags, and the total pixel points of the child tags and the mother tags are calculated respectively.
  • the track identification is to process the handwriting on the picture information in the newly uploaded optical port information as a single pixel, and perform track comparison.
  • the screening recognition includes word number recognition, line number recognition, and overprint recognition;
  • Step S504 If it is a hybrid, first use the method of step S502 to identify the printed body, and perform a search and comparison with the picture information in the optical port information tag database. If the unique target picture information is found, call and All the information of the paper label corresponding to the target picture information and activate the corresponding optical port coding; if the unique target picture information cannot be determined, then the method of step S503 is used to identify the handwriting and then identify the content, and communicate with the optical port. Find and compare the picture information in the information tag database.
  • the optical fiber network intelligent management system of the present invention includes:
  • An intelligent terminal is used for information collection, identification, and supplementary correction of the optical fiber routing port.
  • the intelligent terminal can be, for example, an optical fiber full data detector, or a mobile phone or a pad that can be installed with an APP that implements the above-mentioned intelligent maintenance method.
  • the paper label on the connector of the optical fiber routing port takes pictures to collect pictures, and after processing each of the pictures, generates image information, and combines the image information and the information of the optical fiber routing port corresponding to the image information.
  • the server when updating and maintaining the optical port information label database, the server must identify the optical port label after receiving the optical port information uploaded by the smart terminal, and find the same label with the same area information in the optical port information label database. If the same label as the optical port information is found, download all the information of the optical port and activate the optical port information; if there is no same label as the optical port information, instruct the smart terminal to enter the relevant information of the fiber routing port and The combined optical interface information is generated, and the new optical interface information is uploaded to the server and entered into the optical interface information label database to complete the update and maintenance of the optical interface information label database and avoid repeated entry or wrong recording.
  • a paper tag on an optical fiber routing port (optical port) connector can be photographed and collected on a smart terminal, a picture of the paper tag can be selected and processed, and the processed picture on the smart terminal can be processed.
  • Text format, with additional address information (including but not limited to GPS address information) uploaded to the cloud server, the cloud server intelligently identifies the picture, and the background information of the picture such as the optical port code, connection point line and end face loss information, location address (Including but not limited to GPS), connected equipment, and other information are stored in the warehouse; at the same time, the content in the paper label is identified, and the optical port is associated with other optical ports according to the identified content to form a fiber line routing topology map.
  • FIG. 3 is a schematic diagram of a working process according to another embodiment of the present invention.
  • the smart terminal optical fiber full data detector, mobile phone, Pad, etc.
  • the graphic format processed on the smart terminal is added to the cloud server after adding address information (including but not limited to GPS address information), and the cloud server uses the address information to extract data in the database that is close to the target location.
  • address information including but not limited to GPS address information
  • the cloud server uses the address information to extract data in the database that is close to the target location. Compare to correct and update the optical port information label database in time.
  • printed labels can be directly identified as electronic document information for searching; handwritten labels can be screened and compared by image recognition technology.
  • the invention can also locate and prompt the paper label on the spot as needed.
  • the light of the paper label to be searched can be input on the smart terminal (optical fiber full data detector, mobile phone, Pad, etc.).
  • Port code this optical port code can be a system code, or the content and code in a paper label. Click the optical port code to enter the optical port code information page, and use the address prompt or navigation to reach the target optical port code.
  • click the activation button to instruct the optical port locator on the cabinet unit where the target optical port code is located to emit light and sound through the cloud server, guide the construction personnel to the corresponding cabinet, and the target port will be displayed on the display of the optical port locator.
  • the horizontal and vertical coordinates of the position of the locator help the construction staff to find the corresponding paper label.
  • an APP capable of implementing the above-mentioned intelligent maintenance method can be installed on a smart phone or a Pad, and a paper label is used to collect and associate information such as an optical port code, connection point line and end face loss information, location address (including (But not limited to GPS), connected devices, and other information integration processing technologies; APP scans paper tags to download all the information of the target optical port from the cloud server, and can be used, that is, the "photograph stand" effect.
  • the smart terminal mobile phone or Pad
  • related information such as optical port coding, connection point line and endface loss information, location address (including but not limited to GPS), and connected devices are combined and uploaded to the cloud server.
  • the cloud server divides the pictures into printed and handwritten based on the pictures uploaded by the smart terminal, and adds them to the optical port paper label information database after adding related information.
  • the routing topology of the target optical port is automatically generated based on the paper label content and related information.
  • the paper label is entered, there is a cabinet label on the cabinet. At this time, you only need to scan the code, enter the cabinet page of the APP, and click the optical port of the label to be collected. After entering, you can see the corresponding paper label.
  • the optical port information is entered if there is no optical port information.
  • the server recognizes the paper label and determines whether there is a conflict with other labels. If not, it stores the optical port information corresponding to the paper label and updates the optical port paper label information. Database; if there is, it will form a conflict event and ask the maintenance personnel to handle it; if there is optical port information, you can see the paper label picture downloaded from the server's optical port paper label information database and compare it with the on-site label.
  • optical port information will cause a conflict event and it is requested to be handled by the maintenance personnel; if there is no such optical port information, the optical port information of the paper label is updated.
  • the construction personnel When the construction personnel conducts the optical port identification and query at the scene, they directly take a photo of the paper label on the optical port connector, attach the address information (including but not limited to GPS address information), and upload it to the cloud server.
  • the cloud server compares the database information with the address information. Screening, content comparison and image comparison of the respective photos, and the corresponding association information and routing topology map information are retrieved from the database, and downloaded to the smart terminal of the construction staff for use by the field construction staff. You can also reversely activate the positioning prompter on the patch panel where the paper label is located through the optical port code, and find the corresponding paper label by sound and light prompt.
  • the invention can be applied in the following various situations:
  • the construction staff inserts the connector into the required optical port according to the requirements, and records the business of the connector by inserting the name of the computer room, the cabinet number, the frame number, and the rows and columns Type, line code, opposite optical port position, length, and input to form a paper label; take a photo of the paper label, and then take the photo of the paper label and the above optical port information, together with the fiber line loss at the optical port, and the optical fiber connection
  • the end-face loss of points, as well as personnel information and time information are realized in the APP;
  • the electronic files of the organic room (electronic paper label): the construction personnel take photos of the existing paper labels, attach GPS location information, the system according to the computer room address, computer room name, cabinet name number, frame number, The rows and columns form a system code for searching.
  • the photos of the paper label are uploaded to the server after being automatically corrected and enhanced and sharpened by the mobile phone APP for identification and query use.
  • Optical port positioning and search The construction personnel activate the optical port coding through the APP, and the activation information is emitted through the cloud server to instruct the optical port locator installed in the computer room and cabinet where the optical port is located, prompting the site construction staff to find the corresponding cabinet. Find the connector on the corresponding optical port according to the coordinates of the optical port prompted by the APP, or display the position of the optical port through the indicator light connected to each optical port through the optical port locator.
  • the paper label bundled on the connector is linked to the APP. Compare the paper tags in the downloaded optical port information. If they match, perform the optical port operation; if the content does not match, take a photo of the paper tag bundled on the optical port connector and upload it to the cloud server for identification and retrieval. , Find the relevant information of the wrong optical port, through historical query, routing information correction, and finally calibrate the optical port information, and finally achieve the consistency of field information and cloud server information, which can effectively improve work efficiency and correct errors;
  • the electronic information of the paper labels of the organic room is used to connect all the relevant paper label information together through the optical path coding and business type to form a routing circuit diagram. Or it is determined by the peer information that it is a line, that is, the same route;
  • Connector troubleshooting When the connector fails to pop out the optical port, the camera can download the complete information through the photo paper label, confirm the position of the optical port, and quickly resolve the fault;
  • the construction staff records the line loss and connector connection surface loss test of each connection point of the optical fiber connection, and can be efficiently identified by the electronic photo identification of the paper label. Complete the download and confirmation of the information of the optical connector, and automatically input the detection data through the full data detector, and finally analyze the degraded fiber optic lines and connection points through the historical data graphics, and perform maintenance in advance to troubleshoot the problem beforehand;
  • Paper label replaces electronic label electronic label has three functions, one is information recording, the second is optical port positioning, and the third is wrong insertion alarm.
  • This function is redundant, and the third incorrect alarm is a redundant function, because the line conditions at the construction site are different from the design content of the drawing.
  • the construction site can adjust which optical port the connector is inserted into. If the optical port has poor connection conditions, It is extremely normal to replace the optical port.
  • the criterion is whether the business is open.
  • the construction staff will eventually write the correct information on the paper label, and upload the information by taking pictures to ensure that the field information is consistent with the server information and work efficiently.
  • the electronic tag was incorrectly inserted into the alarm, and the on-site construction staff was required to notify the background staff to re-issue the work order and change the work order according to the optical port on the scene, which is inefficient;

Landscapes

  • Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Data Mining & Analysis (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer And Data Communications (AREA)

Abstract

La présente invention concerne un procédé de gestion intelligente de réseau à fibres optiques et un système de gestion. Le procédé de gestion intelligente comprend : la collecte d'informations (S100), par photographie et collecte d'images d'étiquettes en papier sur des connecteurs de tous les ports de routage à fibres optiques dans une salle de serveur via un terminal intelligent ; le traitement des images (S200), par traitement de chacune des images pour générer des informations d'image ; la synthèse des informations (S300), par combinaison des informations d'image et des informations des ports de routage à fibres optiques correspondant aux informations d'image pour générer des informations de port optique ; le téléchargement des informations (S400), par téléchargement des informations de port optique à un serveur d'arrière-plan ou un serveur infonuagique ; et la création d'une base de données (S500), lorsque le serveur d'arrière-plan ou le serveur infonuagique reçoit les informations de port optique, par génération d'une base de données d'étiquettes d'informations de port optique. La présente invention concerne en outre le système de gestion intelligente de réseau optique appliquant le procédé.
PCT/CN2018/101728 2018-08-22 2018-08-22 Procédé de gestion intelligente de réseau à fibres optiques et système de gestion Ceased WO2020037546A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2018/101728 WO2020037546A1 (fr) 2018-08-22 2018-08-22 Procédé de gestion intelligente de réseau à fibres optiques et système de gestion
CN201880096752.9A CN112654975B (zh) 2018-08-22 2018-08-22 一种光纤网络智能管理方法及管理系统

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/101728 WO2020037546A1 (fr) 2018-08-22 2018-08-22 Procédé de gestion intelligente de réseau à fibres optiques et système de gestion

Publications (1)

Publication Number Publication Date
WO2020037546A1 true WO2020037546A1 (fr) 2020-02-27

Family

ID=69592410

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/101728 Ceased WO2020037546A1 (fr) 2018-08-22 2018-08-22 Procédé de gestion intelligente de réseau à fibres optiques et système de gestion

Country Status (2)

Country Link
CN (1) CN112654975B (fr)
WO (1) WO2020037546A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114398335A (zh) * 2021-04-28 2022-04-26 南京续点通信科技有限公司 一种光纤网络资源数字化核查方法及系统
CN113409305B (zh) * 2021-07-15 2022-06-17 中国南方电网有限责任公司 一种光缆资源数字化管理方法
CN116418394B (zh) * 2023-03-08 2025-07-29 国网湖北省电力有限公司随州供电公司 一种通信光纤运行监测方法
CN116776901B (zh) * 2023-08-25 2024-04-30 深圳市爱德泰科技有限公司 一种应用于电力通信机房的光纤配线架标签管理系统
CN119996872A (zh) * 2023-11-09 2025-05-13 华为技术有限公司 光缆路径的模型建立方法、获取方法、装置及计算设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103236951A (zh) * 2013-05-13 2013-08-07 沈越 一种光网络资源的分配标识方法及系统
US20150060539A1 (en) * 2013-09-04 2015-03-05 Adc Telecommunications, Inc. Telecommunications systems with managed connectivity
CN107465528A (zh) * 2016-06-03 2017-12-12 中兴通讯股份有限公司 光分配网络odn资源信息采集方法及装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102684783B (zh) * 2012-05-09 2014-10-08 烽火通信科技股份有限公司 智能配线电子标签的修复方法
CN202856733U (zh) * 2012-06-04 2013-04-03 赵忠旭 光缆管理系统ocms
CN102932062B (zh) * 2012-10-24 2016-07-27 沈越 智能光纤连接分配系统及适配器端口状态信息标识方法
CN104238047A (zh) * 2013-06-06 2014-12-24 泰科电子(上海)有限公司 光纤互连系统及方法
KR20170099573A (ko) * 2016-02-24 2017-09-01 한국전자통신연구원 스마트 라벨, 스마트 라벨을 이용한 광 네트워크 관리 장치 및 관리 방법
CN108400814B (zh) * 2018-05-29 2024-05-10 南京锦龙装饰工程有限公司 一种光子标签系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103236951A (zh) * 2013-05-13 2013-08-07 沈越 一种光网络资源的分配标识方法及系统
US20150060539A1 (en) * 2013-09-04 2015-03-05 Adc Telecommunications, Inc. Telecommunications systems with managed connectivity
CN107465528A (zh) * 2016-06-03 2017-12-12 中兴通讯股份有限公司 光分配网络odn资源信息采集方法及装置

Also Published As

Publication number Publication date
CN112654975A (zh) 2021-04-13
CN112654975B (zh) 2024-05-24

Similar Documents

Publication Publication Date Title
CN112639824B (zh) 一种光纤网络智能维护方法和装置
WO2020037546A1 (fr) Procédé de gestion intelligente de réseau à fibres optiques et système de gestion
USRE48692E1 (en) Method of capturing information about a rack and equipment installed therein
KR101810578B1 (ko) 셔터 클릭을 통한 자동 미디어 공유
KR102195999B1 (ko) 이미지 주석정보의 처리 방법, 장치 및 시스템
CN113034025B (zh) 一种遥感图像标注系统和方法
CN105468696B (zh) 一种巡检路线地图管理系统
WO2020037545A1 (fr) Système de maintenance intelligente de réseau de fibres optiques et application de maintenance intelligente de réseau de fibres optiques
US11170214B2 (en) Method and system for leveraging OCR and machine learning to uncover reuse opportunities from collaboration boards
US7565013B2 (en) Character recognition method, method of processing correction history of character data, and character recognition system
CN116343210A (zh) 档案数字化的管理方法及装置
CN113255879A (zh) 一种深度学习标注方法、系统、计算机设备和存储介质
CN113361404B (zh) 用于识别文本的方法、装置、设备、存储介质及程序产品
CN112417195A (zh) 基于移动端的商标查询系统、方法及存储介质
CN109635807A (zh) 信息录入方法、装置、设备及计算机可读存储介质
CN111310428B (zh) 一种纸质表格笔迹自动录入传输系统及方法
CN114863412B (zh) 一种路段交限信息的处理方法、装置、设备和介质
KR102276491B1 (ko) 시약병 특징을 이용한 영상분석 시약정보 수집 방법 및 장치
CN113821144B (zh) 一种数据标注方法、装置、系统和介质
CN104978623A (zh) 个人信息管理服务系统
CN112905722B (zh) 一种行为识别的方法、装置及存储介质
CN107944448A (zh) 一种图像异步编辑方法及装置
CN120371356B (zh) 视觉模型升级方法、电子设备、存储介质及程序产品
CN120085773B (zh) 基于云档案库的物业档案管理方法、装置、设备、介质
CN115640952B (zh) 一种数据导入上传的方法及系统

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: 18930536

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: 18930536

Country of ref document: EP

Kind code of ref document: A1