[go: up one dir, main page]

WO2019033281A1 - Procédés et dispositif informatique pour modifier une fonction de plan utilisateur - Google Patents

Procédés et dispositif informatique pour modifier une fonction de plan utilisateur Download PDF

Info

Publication number
WO2019033281A1
WO2019033281A1 PCT/CN2017/097550 CN2017097550W WO2019033281A1 WO 2019033281 A1 WO2019033281 A1 WO 2019033281A1 CN 2017097550 W CN2017097550 W CN 2017097550W WO 2019033281 A1 WO2019033281 A1 WO 2019033281A1
Authority
WO
WIPO (PCT)
Prior art keywords
user plane
plane function
tunnel
session
upf
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/CN2017/097550
Other languages
English (en)
Inventor
Jinguo Zhu
Fei Lu
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.)
ZTE Corp
Original Assignee
ZTE Corp
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 ZTE Corp filed Critical ZTE Corp
Priority to PCT/CN2017/097550 priority Critical patent/WO2019033281A1/fr
Publication of WO2019033281A1 publication Critical patent/WO2019033281A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node

Definitions

  • the present disclosure is related generally to wireless networks and, more particularly, to methods and a computing device for changing a user plane function.
  • each user plane function has a service area.
  • UE user equipment
  • the session management function may provide the UPF service area to the access and mobility management function (AMF) , so when the AMF detect the UE move out or in the UPF service area, the AMF can send a notification the SMF so the SMF can decide to select a new UPF.
  • AMF access and mobility management function
  • RRC radio resource control
  • the UPF may be relocated.
  • a tunnel is established between the old UPF and new UPF for downlink data forwarding.
  • a tunnel is established between the new UPF and the anchor UPF so the anchor UPF can send downlink data directly to the new UPF.
  • the new UPF may receive downlink data from the old UPF and the anchor UPF at the same time. This may cause downlink data to arrive out of order.
  • FIG. 1 is a diagram of a system in which various embodiments of the disclosure are implemented.
  • FIG. 2 shows an example hardware architecture, according to an embodiment.
  • FIG. 3 is a message flow diagram showing an example of currently existing method to recover the AMF when the UE initiates uplink signalling towards the network.
  • FIG. 4A and FIG. 4B are message flow diagrams of method for recovering an access management function for a user equipment according to different embodiments.
  • a method for changing a user plane function for a user equipment in a wireless network involves a computing device such as a session management function (e.g., computing device executing software that carries out a session management function) carrying out the following actions: when the user equipment is activating a protocol data unit session and has moved out of a service area of a first user plane function, establishing a tunnel for downlink data for the user equipment between the first user plane function and a second user plane function, but not between an anchor user plane function and the second user plane function; once the protocol data unit session is deactivated, tearing down the tunnel between the first user plane function and the second user plane function and establishing a tunnel between the anchor user plane function and the second user plane function for downlink data.
  • a session management function e.g., computing device executing software that carries out a session management function
  • a method for changing a user plane function for a user equipment in a wireless network when the user equipment moves out of a service area of a first user plane function involves a computing device such as a session management function carrying out the following actions: receiving a protocol data unit session update message; in response to receiving the protocol data unit session update message, selecting the second user plane function; transmitting a session establishment request to the second user plane function; transmitting a session modification request to the first user plane function, wherein the session modification request indicates that the first user plane function is to establish a tunnel to the second user plane function for downlink data for the user equipment; and establishing a tunnel between an anchor user plane function and the second user plane function for downlink data only after the protocol data unit session is inactive.
  • Table 1 lists various abbreviations used in the present disclosure, along with their expanded forms.
  • SGW Serving Gateway SM Session Management
  • SMF Session Management Function
  • TAI Tracking Area Identity
  • TEID Tunnel Endpoint Identifier
  • TFT Traffic Flow Template UE User Equipment UL Uplink
  • UPF User Plane Function
  • 5G-RAN 5G Radio Access Network
  • N2AP N2 application protocol
  • CDB Context database
  • 5G-GUTI Globally Unique Temporary Identity
  • 5G-S-TMSI 5G S-Temporary Mobile Subscriber Identity GUAMI Globally Unique AMF ID
  • FIG. 1 a wireless communication system in which the various embodiments may be deployed is shown.
  • a UE 102 a RAN 104, an an AMF 106, an SMF 110, a first UPF (also referred to as an “old UPF” ) 112, a second UPF (also referred to as a “new UPF” ) 114, and an anchor UPF 116.
  • a first UPF also referred to as an “old UPF”
  • second UPF also referred to as a “new UPF”
  • anchor UPF 116 an anchor UPF 116.
  • Each of these components is implemented on computer hardware, although the components are often referred to by their respective functions.
  • the AMF 106 is, in an embodiment, a computing device that executes software implementing an access management function.
  • each component may be a separate, independent piece of hardware from the other components.
  • SMF 110 an embodiment of which is a computing device executing software implementing a session management function
  • each UPF an embodiment of which is a computing device executing software implementing a user plane function
  • each component may be a separate, independent piece of hardware from the other components.
  • the RAN 104 includes many communication nodes such as one or more enhanced or next generation Node Bs, each of which may include one or more base stations, and each of which may define one or more wireless cells.
  • the RAN a base station 104.
  • Possible implementations of the UE 102 include any device capable of wireless communication, such as a smartphone, tablet, laptop computer, and non-traditional devices (e.g., household appliances or other parts of the “Internet of Things” ) .
  • the AMF 106 i.e., a computing device executing software that carries out the AMF
  • the AMF 106 also carries out access authentication and access authorization, acts as the NAS security termination, and relays the SM NAS between the UE 102 and the SMF, etc.
  • NAS is a layer over which signal communication between the UE and the core network takes place.
  • the SMF 110 carries out session management (e.g., for PDU sessions) , allocates IP addresses to UEs (including optional authorization functions) , and selects and controls the UPF 112 for data transfer. If a UE 102 has multiple PDU sessions, different SMFs may be allocated to each session to manage.
  • Each UPF (i.e., a computing device executing software that carries out the UPF) carries out procedures in support of RANs such as: acting as an anchor point for mobility between and within RATs, packet routing and forwarding, traffic usage reporting, quality-of-service handling for the user plane, downlink packet buffering, downlink data notification triggering, etc.
  • FIG. 2 illustrates a basic (computing device) hardware architecture implemented by the elements of FIG. 1, including the according to an embodiment.
  • the elements of FIG. 1 have other components as well.
  • the hardware architecture depicted in FIG. 2 includes logic circuitry 202, memory 204, transceiver 206, and one more antennas represented by antenna 208.
  • the memory 204 may be or include a buffer that, for example, holds incoming transmissions until the logic circuitry is able to process the transmission.
  • Each of these elements is communicatively linked to one another via one or more data pathways 210. Examples of data pathways include wires, conductive pathways on a microchip, and wireless connections.
  • logic circuitry means a circuit (atype of electronic hardware) designed to perform complex functions defined in terms of mathematical logic. Examples of logic circuitry include a microprocessor, a controller, or an application-specific integrated circuit. When the present disclosure refers to a device carrying out an action, it is to be understood that this can also mean that logic circuitry integrated with the device is, in fact, carrying out the action.
  • Possible implementations of the memory 204 include: volatile data storage; nonvolatile data storage, electrical memory, magnetic memory, optical memory, random access memory ( “RAM” ) , cache memory, and hard drives.
  • FIG. 3 through FIG. 5 various components are shown engaging wireless and wired communication. These components have the same structure and basic functionality as described above in conjunction with FIG. 1 and FIG. 2.
  • FIG. 4 and FIG. 5 depict additional and novel functionality, which is described in more detail in the accompanying description.
  • the AMF may detect that the UE moves outside of a UPF service area and a new UPF may need to be selected.
  • the anchor UPF 316 sends downlink data to the old UPF 312.
  • the old UPF 312 buffers the downlink data and sends a downlink data notification to the SMF 310.
  • the SMF 310 sends a downlink data notification to the AMF 306.
  • This message includes the SUPI (5G Subscription Permanent Identifier) to identify the UE 302 and a protocol data unit (PDU) session ID to identify the PDU session over which the downlink data are received.
  • This message also includes the Session related information such as Quality of Service (QoS) flow information and the old UPF N3 tunnel information.
  • QoS Quality of Service
  • the AMF 306 finds the UE context based on the SUPI and sends a paging request (5G-S-TMSI, paging priority) to all RAN within the Registration area.
  • the 5G-S-TMSI is the short temporary identifier of the UE.
  • the PDU session ID may be used to decide the paging priority.
  • the RAN 304 sends Paging request (5G-S-TMSI) over the air.
  • This RRC connection request message includes the 5G-S-TMSI.
  • the UE 302 sends a NAS Service Request over the RRC connection to the RAN 304.
  • the RAN 304 selects the AMF according the 5G-S-TMSI received at 356.
  • the RAN 304 forwards the NAS service request message to the AMF 306, together with the current UE location information.
  • the AMF may detects the UE moves outside of the service area of the UPF, it hold the procedure and sends PDU session update to SMF, together with the current UE location information. If the AMF 306 determines that the UE 304 is within the UPF service area, steps 359-362 are skipped.
  • the SMF 310 may select a new UPF 314 and send an N4 Session establishment request to the new UPF 314.
  • the new UPF 314 may allocate three tunnels: one towards the anchor UPF 316 for normal N9 downlink data, one towards the RAN 304 for normal N3 uplink data, and one towards the old UPF 312 for data forwarding.
  • the SMF 310 also provides the new UPF 314 about the anchor UPF N9 tunnel information to send uplink data.
  • the new UPF responds by transmitting an N4 Session establishment response to the SMF 310.
  • the SMF 310 sends an N4 Session modification request to the anchor UPF 316 to update the new UPF N9 tunnel information. From this step, the anchor UPF 316 can start to send downlink data towards the new UPF 314.
  • the SMF 310 sends an N4 Session modification request to the old UPF 312 to establish the data forwarding tunnel.
  • the SMF 310 start a timer to monitor the data forwarding. From this step, the new UPF 314 may receive forwarded data from the old UPF 312.
  • the SMF 310 sends PDU session Response to the AMF 306.
  • This message includes the new UPF N3 tunnel information, Session related information such as QoS flow information.
  • the AMF 306 sends an N2 message to the RAN 304.
  • This message includes the UPF N3 tunnel information (new UPF in case of UPF change) , Session related information such as QoS flow information received from the SMF.
  • the RAN 304 performs an RRC reconfiguration to establish the dedicated radio bearer for the PDU session based on the information received from AMF 306.
  • the RAN 304 allocates N3 tunnel information and sends an N2 UE context setup response message to the AMF 306, including the RAN N3 tunnel information.
  • the AMF 306 sends a PDU session update to the SMF 310, including the RAN N3 tunnel information.
  • the SMF 310 sends an N4 Session modification request to the new UPF 314, to update the RAN 3 tunnel information. From this step, the downlink data can be sent to the RAN 304.
  • the SMF 310 sends an N4 Session modification response to the AMF 306.
  • the SMF 310 send an N4 Session Release procedure to the old UPF 312 to release the resources of the data forwarding tunnel.
  • the SMF 310 sends and N4 Session Modification procedure to the new UPF 314 to release the resources of the data forwarding tunnel.
  • the new UPF may receive downlink data from the old UPF and from the anchor UPF at the same time. This may cause the downlink data to arrive out of order which, for some applications, may be disruptive.
  • the establishment of an N9 tunnel between the new UPF and the anchor UPF is delayed until the PDU session becomes inactive.
  • the downlink data is only sent via the old UPF to new UPF.
  • the anchor UPF 416 sends downlink data to the old UPF 412.
  • the old UPF 412 buffers the downlink data and sends downlink data notification to SMF 410.
  • the SMF 410 sends a downlink data notification to the AMF 406.
  • This message includes the SUPI (5G Subscription Permanent Identifier) to identify the UE 402 and a PDU session ID to identify the PDU session over which the downlink data is received.
  • This message also includes the Session related information such as QoS flow information and the old UPF N3 tunnel information.
  • the AMF 406 finds the UE context based on the SUPI and sends a paging request (5G-S-TMSI, paging priority) to all RANs within the Registration area.
  • the 5G-S-TMSI is the short temporary identifier of the UE.
  • the PDU session ID may be used to decide the paging priority.
  • the RAN 404 sends a Paging request (5G-S-TMSI) over the air.
  • the UE 402 when the UE 402 receives the Paging request from the RAN 404, it responds by sending an RRC connection request message to the RAN 404 to establish the RRC connection.
  • This RRC connection request message includes the 5G-S-TMSI.
  • the UE 402 sends a NAS Service Request over the RRC connection to the RAN 404.
  • the RAN 404 selects the AMF according the 5G-S-TMSI received in step 456.
  • the RAN 404 forwards the NAS service request message to the AMF 406, together with the current location information for the UE 402.
  • the AMF 406 determines that the UE 402 has move outside of the service area of the old UPF 412 then, based on this determination, the AMF 406 holds the procedure (e.g., refrains from establishing the tunnel from the anchor UPF 416) and sends a PDU session update to the SMF 410, together with the current location information. If the AMF 406 determines that the UE 402 is still within the UPF service area, steps 459-461 are skipped.
  • the SMF 410 selects a new UPF (UPF 414 in this example) and sends the N4 Session establishment request to the new UPF 414.
  • the new UPF 414 may allocate two tunnels: one towards the RAN 404 for normal N3 uplink data and one N9 towards the old UPF 412 for N9 downlink data.
  • the SMF 410 also provides the anchor UPF 416’s N9 tunnel information to the new UPF 414 so that the new UPF 414 can send uplink data to the anchor UPF 416.
  • the new UPF 414 responds by transmitting an N4 Session establishment response to the SMF 410.
  • the new UPF 414 will send uplink data to the anchor UPF 416 and receive downlink data from the old UPF 412.
  • the SMF 410 sends an N4 Session modification request to the old UPF 412 to establish the N9 tunnel between the new UPF 414 and the old UPF 412. From this step, the new UPF 414 receives forwarded data from the old UPF 412.
  • the SMF 410 sends a PDU session Response to the AMF 406.
  • This message includes the new UPF N3 tunnel information and Session related information such as QoS flow information.
  • the AMF 406 sends an N2 UE context setup message to the RAN 404.
  • This message includes the UPF N3 tunnel information (new UPF in case of UPF change) and Session related information such as QoS flow information received from the SMF 410.
  • the RAN 404 performs RRC reconfiguration to establish the dedicated radio bearer for the PDU session based on the information received from the AMF 406.
  • the RAN 404 allocates N3 tunnel information and sends an N2 UE context setup response message to the AMF 406, including the RAN N3 tunnel information.
  • the AMF 406 sends a PDU session update to the SMF 410, including the RAN N3 tunnel information.
  • the SMF 410 sends an N4 Session modification request to the new UPF 414 in order to update the RAN 3 tunnel information. From this step, the downlink data can be sent from new UPF 414 to the RAN 404.
  • the SMF 410 sends an N4 Session modification response to the AMF 406.
  • FIG. 4B shows a continuation of the procedure of FIG. 4A, with the assumption that the UE 402 deactivates the PDU session.
  • the AMF 406 determines to deactivate the PDU session.
  • the RAN context therefore needs to be released, which the AMF 406 begins doing.
  • the AMF 406 sends a PDU session Deactivation request to the SMF 410.
  • the SMF 410 sends an N4 Session modification request to the anchor UPF 416 to update the N9 tunnel information of the new UPF 414. From this step, the N9 tunnel between the new UPF 414 and the anchor UPF 416 is established to send both uplink and downlink data.
  • the SMF 410 sends a PDU session deactivation ACK to the AMF 406.
  • the AMF 406 sends a UE context release command to the RAN 404.
  • the RAN 404 releases the RRC connection.
  • the RAN 404 sends a UE context release complete message to the AMF 406.
  • the SMF 410 also releases the resources of the old UPF 412.
  • any and all of the methods described herein are carried out by or on one or more computing devices. Furthermore, instructions for carrying out any or all of the methods described herein may be stored on a non-transitory, computer-readable medium, such as any of the various types of memory described herein.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de modification d'une fonction de plan utilisateur pour un équipement d'utilisateur dans un réseau sans fil. Le procédé comprend un dispositif informatique tel qu'une fonction de gestion de session exécutant les actions suivantes : lorsque l'équipement d'utilisateur active une session d'unité de données de protocole et qu'il a quitté une zone de service d'une première fonction de plan utilisateur, établir un tunnel pour des données de liaison descendante pour l'équipement d'utilisateur entre la première fonction de plan utilisateur et une seconde fonction de plan utilisateur, mais pas entre une fonction de plan utilisateur d'ancrage et la seconde fonction de plan utilisateur; une fois l'unité de données de protocole désactivée, supprimer le tunnel entre la première fonction de plan utilisateur et la seconde fonction de plan utilisateur et établir un tunnel entre la fonction de plan utilisateur d'ancrage et la seconde fonction de plan utilisateur pour des données de liaison descendante.
PCT/CN2017/097550 2017-08-15 2017-08-15 Procédés et dispositif informatique pour modifier une fonction de plan utilisateur Ceased WO2019033281A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/097550 WO2019033281A1 (fr) 2017-08-15 2017-08-15 Procédés et dispositif informatique pour modifier une fonction de plan utilisateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/097550 WO2019033281A1 (fr) 2017-08-15 2017-08-15 Procédés et dispositif informatique pour modifier une fonction de plan utilisateur

Publications (1)

Publication Number Publication Date
WO2019033281A1 true WO2019033281A1 (fr) 2019-02-21

Family

ID=65361676

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/097550 Ceased WO2019033281A1 (fr) 2017-08-15 2017-08-15 Procédés et dispositif informatique pour modifier une fonction de plan utilisateur

Country Status (1)

Country Link
WO (1) WO2019033281A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3611904A4 (fr) * 2017-05-11 2020-06-17 Huawei Technologies Co., Ltd. Procédé de mise en mémoire tampon de données et entité fonctionnelle de gestion de session
WO2020197454A1 (fr) * 2019-03-28 2020-10-01 Telefonaktiebolaget Lm Ericsson (Publ) Radiomessagerie de dispositifs de communication sans fil à l'état inactif
CN112929868A (zh) * 2019-12-05 2021-06-08 中兴通讯股份有限公司 跨区漫游通信方法、装置、电子设备及计算机可读介质
CN113473446A (zh) * 2020-03-31 2021-10-01 中国电信股份有限公司 用户面改变方法、系统和移动边缘计算网元
EP3917230A4 (fr) * 2019-02-22 2022-08-24 Huawei Technologies Co., Ltd. Procédé et appareil de transmission de données, et support de stockage informatique

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
HUAWEI ET AL.: "T S 23.501: DL Data buffering and DDN", 3GPP TSG SA WG2 MEETING #122 S 2-175207, 30 June 2017 (2017-06-30) *
HUAWEI ET AL.: "TS 23.501: DL Data buffering and DDN", 3GPP TSG SA WG2 MEETING #122 S 2-174330, 30 June 2017 (2017-06-30) *
HUAWEI ET AL.: "TS 23.501: DL Data buffering and DDN", 3GPP TSG SA WG2 MEETING #122, 30 June 2017 (2017-06-30), pages 2 - 175167 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3611904A4 (fr) * 2017-05-11 2020-06-17 Huawei Technologies Co., Ltd. Procédé de mise en mémoire tampon de données et entité fonctionnelle de gestion de session
US11464070B2 (en) 2017-05-11 2022-10-04 Huawei Technologies Co., Ltd. Data buffering method and session management function entity
EP3917230A4 (fr) * 2019-02-22 2022-08-24 Huawei Technologies Co., Ltd. Procédé et appareil de transmission de données, et support de stockage informatique
US12052646B2 (en) 2019-02-22 2024-07-30 Huawei Technologies Co., Ltd. Data transmission method, apparatus, and computer storage medium
WO2020197454A1 (fr) * 2019-03-28 2020-10-01 Telefonaktiebolaget Lm Ericsson (Publ) Radiomessagerie de dispositifs de communication sans fil à l'état inactif
CN112929868A (zh) * 2019-12-05 2021-06-08 中兴通讯股份有限公司 跨区漫游通信方法、装置、电子设备及计算机可读介质
CN113473446A (zh) * 2020-03-31 2021-10-01 中国电信股份有限公司 用户面改变方法、系统和移动边缘计算网元
CN113473446B (zh) * 2020-03-31 2022-08-30 中国电信股份有限公司 用户面改变方法、系统和移动边缘计算网元

Similar Documents

Publication Publication Date Title
US12133277B2 (en) Methods for supporting session continuity on per-session basis
US11758002B2 (en) Session processing method, apparatus, and system
EP3485696B1 (fr) Régulation d'espacement de service pour un dispositif sans fil
EP2908566B1 (fr) Procédé et système pour réaliser une gestion de la mobilité d'un réseau fédérateur de paquet évolué
US11083043B2 (en) Method and system for user equipment (UE) registration
CN109892003B (zh) 经由具有中继能力的用户装备ue在远程ue和电信网络之间建立连接的方法和系统
EP3777069B1 (fr) Procédés et système de délestage de trafic de données
US11284464B2 (en) Terminal apparatus, apparatus in core network, and communication control method
US11678395B2 (en) Terminal apparatus, apparatus in core network, and communication control method
WO2019033281A1 (fr) Procédés et dispositif informatique pour modifier une fonction de plan utilisateur
EP4037373A1 (fr) Procédé et dispositif de communication
CN111466131B (zh) 用于在多个接入之间分割流量的方法和计算设备
CN115362710A (zh) 切片信息更新的方法
WO2019024042A1 (fr) Procédés et dispositif informatique pour maintenir une connexion de commande de ressources radio pour un équipement d'utilisateur
CN113709763B (zh) 接入控制方法及装置、存储介质、终端
EP3536117B1 (fr) Changement ancré pdcp d'une liaison basée sur un relais
WO2018223311A1 (fr) Procédés et dispositif informatique pour faciliter un transfert intercellulaire d'un premier réseau à un second réseau
WO2016086611A1 (fr) Procédé pour l'acquisition de fqdn pgw, pgw domestique et système
WO2019033278A1 (fr) Procédés et dispositif informatique pour régénérer une fonction de gestion d'accès
US20250287279A1 (en) Notification of sgw change for one or more pdn connections when combined sgw/pgw/smf set is deployed
EP3310116A1 (fr) Notification de données de liaison descendante
CN111901899B (zh) 一种通信方法及装置
CN102724771A (zh) 一种用户去附着方法和系统

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: 17922033

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 10/09/2020)

122 Ep: pct application non-entry in european phase

Ref document number: 17922033

Country of ref document: EP

Kind code of ref document: A1