WO2017088488A1 - Procédé d'émission pour réseau ultra-dense, station de base, équipement d'utilisateur et élément de réseau - Google Patents

Procédé d'émission pour réseau ultra-dense, station de base, équipement d'utilisateur et élément de réseau Download PDF

Info

Publication number
WO2017088488A1
WO2017088488A1 PCT/CN2016/088902 CN2016088902W WO2017088488A1 WO 2017088488 A1 WO2017088488 A1 WO 2017088488A1 CN 2016088902 W CN2016088902 W CN 2016088902W WO 2017088488 A1 WO2017088488 A1 WO 2017088488A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
user equipment
data cell
data
information
Prior art date
Application number
PCT/CN2016/088902
Other languages
English (en)
Chinese (zh)
Inventor
张庆宏
雒艳
孙中锋
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2017088488A1 publication Critical patent/WO2017088488A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/165—Performing reselection for specific purposes for reducing network power consumption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data

Definitions

  • the present application relates to, but is not limited to, the field of wireless communications, in particular, an Ultra-Density Network (UDN) transmission method, a base station, a UE (User Equipment), and a network element.
  • UDN Ultra-Density Network
  • the International Mobile Telecommunications 2020 5th Generation Mobile Communication System Promotion Group (International Mobile Telecommunications-2020 5G Promotion Group, referred to as IMT-2020 (5G) Promotion Group) proposes that 5G needs to have higher performance than 4G and supports users of 0.1 to 1 Gbps.
  • Experience rate one million connection density per square kilometer, millisecond end-to-end delay, tens of Tbps traffic density per square kilometer, mobility above 500Km per hour and peak rate of tens of Gbps.
  • the user experience rate, the connection density and the delay are the three basic performance indicators of 5G.
  • UDN can achieve frequency reuse by increasing the density of base station deployment, which can greatly improve the efficiency of frequency reuse.
  • ultra-dense networking can achieve capacity improvement of 100 times in local hotspots.
  • the 5G base station spacing is likely to be reduced to less than 30 meters.
  • the UE user equipment moves 15 meters. A switch will occur on the left and right.
  • the wireless signal fluctuates extremely frequently.
  • LTE handover processing uses hard handover.
  • frequent handover causes traffic interruption, which inevitably reduces the user experience rate.
  • a large number of handover signaling will bring severe challenges to the processing capability of the micro base station equipment. .
  • the present application provides an ultra-dense network transmission method, a base station, a UE, and a network element to solve the problem of data transmission interruption caused by cell splitting.
  • the present application provides a method for transmitting data through an ultra-dense network, including:
  • a cell change message is generated and sent to the corresponding network element.
  • the preset data cell change condition includes one or more of the following:
  • the load of the available data cell is less than or equal to the load threshold of the data cell
  • the number of users corresponding to the available data cells is less than or equal to the threshold of the number of users of the data cell
  • the load of the serving cell is greater than the load of the available data cells
  • the number of users corresponding to the serving cell is greater than the number of users corresponding to the available data cells.
  • the step of generating a cell change message and sending the message to the corresponding network element includes:
  • Generating a source data cell change message and transmitting the source data cell change message to the user equipment, the source data cell, and the target data cell, respectively.
  • the method further includes:
  • the configuration information includes one or more of the following:
  • Physical cell indication Physical cell indication, cell radio network temporary indication, cell reference signal, power information, channel quality indication, scheduling request, semi-static scheduling resource, and sounding reference signal.
  • the step of receiving and monitoring information about an available data cell reported by the user equipment include:
  • the information about the available data cells reported by the user equipment is received and monitored by the link between the local cell and the user equipment.
  • the link between the local cell and the user equipment includes: a link between the local cell and the data cell, and a link between the data cell and the user equipment.
  • a base station including:
  • the monitoring module is configured to receive and monitor information about available data cells reported by the user equipment;
  • the control module is configured to generate a cell change message and send the information to the corresponding network element if the information of the available data cell satisfies the preset data cell change condition.
  • control module is configured to generate a path update message, and send the message to the core network of the ultra-dense network; generate a source data cell change message, and send the source data cell change message to the user equipment and the source data respectively.
  • Cell and target data cell are configured to generate a path update message, and send the message to the core network of the ultra-dense network; generate a source data cell change message, and send the source data cell change message to the user equipment and the source data respectively. Cell and target data cell.
  • control module is further configured to: after transmitting the source data cell change message to the user equipment, send configuration information for transmitting data in the target data cell to the user equipment, where
  • the configuration information includes one or more of the following:
  • Physical cell indication Physical cell indication, cell radio network temporary indication, cell reference signal, power information, channel quality indication, scheduling request, semi-static scheduling resource, and sounding reference signal.
  • the present application also provides a method for transmitting data through an ultra-dense network, which includes:
  • the user equipment sends information about the available data cell to the control cell;
  • the user equipment When receiving the cell change message sent by the control cell, the user equipment performs a data cell change process.
  • the step of the user equipment performing a change process of the data cell includes:
  • the user equipment stops transmitting data in the source data cell and starts transmitting data on the target data cell within a specified time sequence.
  • the application further provides a computer readable storage medium storing computer executable instructions that are implemented when the computer executable instructions are executed.
  • the present application further provides a user equipment, including:
  • a monitoring module configured to send information about the available data cells to the control cell
  • the change module is configured to perform a process of changing the data cell when receiving the cell change message transmitted by the control cell.
  • the change module is configured to stop transmitting data in the source data cell and start transmitting data in the target data cell within a specified time sequence.
  • the present application also provides a method for transmitting data through an ultra-dense network, which includes:
  • the data cell change processing is performed according to the cell change message.
  • the present application further provides a network element, including:
  • the monitoring module is configured to receive and monitor a cell change message sent by the control cell;
  • the change module is configured to perform data cell change processing based on the cell change message.
  • the network element includes any one of the following: a network element of a core network of an ultra-dense network, a base station in a source data cell, and a base station in a target data cell.
  • the present application provides a method for transmitting data through an ultra-dense network, a base station, a UE, and a network element, which can solve the problem of user rate drop and delay increase caused by frequently switching data cells in an ultra-dense network, and reduce base station equipment processing.
  • the amount of signaling reduces the cost of the base station.
  • FIG. 1 is a schematic diagram of a method for transmitting data through an ultra-dense network on a base station side according to an embodiment of the present invention; flow chart;
  • FIG. 2 is a flowchart of a method for transmitting data through an ultra-dense network on a UE side according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for transmitting an ultra-dense network according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic diagram of a transmission system of an ultra-dense network according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic diagram of a transmission system of an ultra-dense network according to Embodiment 2 of the present invention.
  • FIG. 6 is a block diagram of a base station according to an embodiment of the present invention.
  • FIG. 7 is a block diagram of a UE according to an embodiment of the present invention.
  • FIG. 8 is a block diagram of a network element according to an embodiment of the present invention.
  • the IMT2020 (5G) propulsion group has clear requirements for the number of links per unit area and the density of the traffic: one million connections per square kilometer, the end-to-end delay in milliseconds, and the traffic density of tens of Tbps per square kilometer;
  • the splitting community is a UHF micro-cell, which will be the most direct and effective measure to achieve this goal.
  • the LTE handover data interruption delay of the related art is a minimum of 50 ms; in addition, a large amount of signaling generated by the infinite splitting of the cell will also increase the cost of the micro base station equipment by a geometric number.
  • the ultra-dense network in the ultra-dense network, all control signaling is sent by a base station in a specific cell, which is referred to herein as a Control Cell (Ccell); the data transmission service is super-dense composed of a plurality of micro cells.
  • the network provides, referred to herein as a data cell (Data Cell, referred to as Dcell).
  • the user equipment needs to maintain a wireless connection with the Ccell and the Dcell at the same time.
  • the UE monitors the Dcell for which the service can be served, and reports the monitoring result to the Ccell.
  • the Ccell determines whether to change the cell, if the Dcell of the UE needs to be changed, the Ccell notifies the UE, the source Dcell, and the target Dcell of the change result, and simultaneously informs the UE of all configuration information required for transmitting data in the target Dcell, and the configuration information includes Some or all of the content:
  • PCI Physical Cell Index
  • CRNTI Cell Radio Network Temporal Index
  • cell reference signal cell reference signal
  • power information cell reference signal
  • CQI Cholog Quality Indicator
  • SR Stule Request
  • SPS Semi-persistent Schedule
  • SRS Sounding Reference Signal
  • the source Dcell, the target Dcell, and the UE notify the Ccell message that, after receiving the information, the serving cell update is completed within a specified time.
  • FIG. 1 is a flowchart of a method for transmitting data through an ultra-dense network on a base station side according to an embodiment of the present invention. As shown in FIG. 1 , the method in this embodiment includes:
  • Step 11 Receive and listen to information about available data cells reported by the user equipment.
  • Step 12 If the information of the available data cell satisfies the preset data cell change condition, a cell change message is generated and sent to the corresponding network element.
  • FIG. 2 is a flowchart of a method for transmitting data through an ultra-dense network on the UE side according to an embodiment of the present invention. As shown in FIG. 2, the method in this embodiment includes:
  • Step 21 The UE sends information about the available data cell to the control cell.
  • Step 22 When receiving the cell change message of the control cell, the UE changes the connected data cell.
  • the method provided in the embodiment of the present invention can solve the problem of interrupted data transmission interruption caused by cell splitting, and helps the cell to be infinitely split; so that the end-to-end delay in the fifth-generation mobile communication system is as low as milliseconds; The split causes a micro-zone signaling storm.
  • the method in this embodiment includes the following steps:
  • Step 101 Pre-condition: The UE accesses the Ccell, and the Ccell has allocated one or several Dcells for the UE to provide data transmission services for the UE.
  • the link between the UE and the Dcell is recorded as a Duu interface, and between the UE and the Ccell.
  • the link is recorded as a Cuu port, and the link between the Dcell and the Ccell is recorded as a DC port.
  • the Ccell coverage area includes one or more Dcells.
  • the Ccell coverage is usually wide and does not belong to the UDN category. Discussed in the application.
  • Step 102 The Ccell monitors and receives the available Dcell information reported by the UE through the Cuu interface, as shown in FIG. 4, where Cuu has some or all of the following features:
  • the design capacity of the Cuu port is lower than that of the Duu port. Since the Cuu port only processes signaling, its capacity and bandwidth requirements are small;
  • the Cuu port has a wide coverage in the low frequency band. Since the coverage of the Ccell needs to include one or more Dcells, the low-frequency radio wave has low spatial propagation loss and good wireless characteristics. Compared with the Duu port, the low frequency is more suitable for the Cuu port;
  • the Cuu port multiplexes the current LTE network. Due to the forward compatibility requirements of the future 5G technology and LTE, the Cuu port can borrow the current LTE network to provide signaling coverage for the UDN.
  • the Cuu port can be transited through the Dcell.
  • the wireless coverage of the Ccell and the Dcell cannot be completely overlapped.
  • the Cuu port signal can also be transited through the Dcell, thereby ensuring that the Cuu port is larger than the Duu port.
  • Step 103 The Ccell receives and listens to the signaling reported by all the UEs in the coverage area through the Cuu interface.
  • the step includes:
  • the information reported by the UE in this step is used as the original input processed in step 104, that is, the basis for determining whether a cell change is required.
  • the UE signaling is reported, and in step 102, the available data cell information is reported.
  • Step 104 Determine whether to change the data cell
  • the Ccell selects all UEs that meet the target Dcell change criteria and their targets according to all available Dcell information reported by all UEs and the target Dcell change criteria set in this embodiment.
  • Dcell these target Dcells constitute a target candidate Dcell set of the UE; finally, the Ccell selects some or all Dcells of the candidate Dcell set as the final target Dcell according to the UE service demand quantity, for the candidate target Dcell set,
  • the service Dcell is Dcell_S
  • the corresponding number of users is Nue_Dcell_S
  • the load is Load_Dcell_S
  • Load_Dcell_Ti ⁇ Thresh_Load_i, where Thresh_Load_i is the load threshold of the target cell i;
  • step 102 If all the target cells do not meet the above conditions, then no cell change is required, proceed to step 102; if all target cells meet the specified one or more conditions, proceed to step 105;
  • Step 105 The Cell generates all the messages required for the cell change, and sends the message to the corresponding network element. After receiving the message, each related network element takes effect at the same time in the agreed time sequence.
  • Step 105 includes:
  • the UE After receiving the message, within a predetermined time sequence, the UE stops data transmission at the source Dcell and starts data transmission at the target Dcell.
  • Embodiments of the present invention further provide a computer readable storage medium storing computer executable instructions that are implemented when the computer executable instructions are executed.
  • Step 201 is the same as the step 101 in the first embodiment.
  • Step 202 The Ccell monitors and receives the available Dcell information reported by the UE through the Cuu interface, where Cuu is a logical connection, and the logical connection is divided into two segments: UE to Dcell and Dcell to Ccell, as shown in FIG. 5; according to step 201, the UE The Dcell is connected through the Duu port; the Dcell to the Ccell is connected through the DC port, that is, the signaling between the UE and the Ccell is encapsulated into a signaling-dedicated logical pipe, which is transmitted through the Duu port and the DC port.
  • the DC port can be a wireless connection or a wired connection.
  • the embodiment of the present invention relates to the field of wireless communication.
  • the wired connection is not discussed too much.
  • the connection for the wireless DC interface is as follows:
  • the DC port has some or all of the following features:
  • the DC port design capacity is lower than the Duu port. Because the DC port only processes signaling, its capacity and bandwidth requirements are relatively small;
  • the DC port has a wide coverage in the low frequency band. Since the coverage of the Ccell needs to include one or more Dcells, the low-frequency radio wave has low spatial propagation loss and good wireless characteristics. Compared with the Duu port, the low frequency is more suitable for the DC port;
  • the DC port multiplexes the current LTE network. Due to the forward compatibility requirements of the future 5G technology and LTE, the DC port can borrow the current LTE network to provide signaling coverage for the UDN.
  • Step 203 the Ccell is monitored and received by the Cuu port, and the signaling reporting of all the UEs in the coverage area is the same as that in the first embodiment;
  • Step 204 determining whether a cell change is required, as in the first embodiment
  • Step 205 The Cell generates all the messages required for the cell change, and sends the message to the corresponding network element. After receiving the message, each related network element takes effect at the same time in the agreed time sequence.
  • FIG. 6 is a block diagram of a base station according to an embodiment of the present invention. As shown in FIG. 6, the base station in this embodiment includes:
  • the monitoring module is configured to receive and monitor information about available data cells reported by the user equipment;
  • the control module is configured to generate a cell change message and send the information to the corresponding network element if the information of the available data cell satisfies the preset data cell change condition.
  • control module is configured to generate a path update message, and send the message to the core network of the ultra-dense network; generate a source data cell change message, and send the source data cell change message to the user equipment, Source data cell and target data cell.
  • control module is further configured to: after transmitting the source data cell change message to the user equipment, send configuration information for transmitting data in the target data cell to the user equipment.
  • the configuration information includes one or more of the following:
  • PCI PCI, CRNTI, cell reference signal, power information, CQI, SR, SPS, SRS.
  • FIG. 7 is a block diagram of a UE according to an embodiment of the present invention. As shown in FIG. 7, the UE in this embodiment includes:
  • a monitoring module configured to send information about the available data cells to the control cell
  • the change module is configured to perform a process of changing the data cell when receiving the cell change message transmitted by the control cell.
  • the change module is configured to stop transmitting data in the source data cell and start transmitting data in the target data cell within a specified time sequence.
  • FIG. 8 is a block diagram of a network element according to an embodiment of the present invention. As shown in FIG. 8, the network element in this embodiment includes:
  • the monitoring module is configured to receive and monitor a cell change message sent by the control cell;
  • the change module is configured to perform data cell change processing based on the cell change message.
  • the network element includes: a network element of a core network of an ultra-dense network, a base station in a source data cell, and a base station in a target data cell.
  • the instructions are related to hardware (eg, a processor) that can be stored in a computer readable storage medium, such as a read only memory, a magnetic disk, or an optical disk.
  • a computer readable storage medium such as a read only memory, a magnetic disk, or an optical disk.
  • all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits.
  • each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function.
  • Embodiments of the invention are not limited to any specific form of combination of hardware and software.
  • the present invention provides a method for transmitting data through an ultra-dense network, a base station, a UE, and a network element, which can solve the problem of user rate drop and delay increase caused by frequently switching data cells in an ultra-dense network, and reduce signaling processing of the base station equipment. Quantity, reducing base station costs.

Abstract

La présente invention concerne un procédé d'émission pour un réseau ultra-dense, une station de base, un équipement d'utilisateur et un élément de réseau. Le procédé comprend : la réception et la surveillance d'informations d'une cellule de données disponible rapportées par un équipement d'utilisateur ; et si les informations de la cellule de données disponible satisfont à une condition de changement de cellule de données prédéfinie, la génération d'un message de changement de cellule, et l'envoi du message de changement de cellule à un élément de réseau correspondant. Au moyen de la solution technique, les problèmes de diminution de débit pour un utilisateur et d'augmentation de délai dus à des transferts intercellulaires fréquents de cellules de données dans un réseau ultra-dense peuvent être résolus, de manière à réduire la quantité de signalisation traitée par un dispositif de station de base, et à réduire les coûts d'une station de base.
PCT/CN2016/088902 2015-11-23 2016-07-06 Procédé d'émission pour réseau ultra-dense, station de base, équipement d'utilisateur et élément de réseau WO2017088488A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510815776.3A CN106792950A (zh) 2015-11-23 2015-11-23 一种超密集网络传输方法、基站、ue及网元
CN201510815776.3 2015-11-23

Publications (1)

Publication Number Publication Date
WO2017088488A1 true WO2017088488A1 (fr) 2017-06-01

Family

ID=58763946

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/088902 WO2017088488A1 (fr) 2015-11-23 2016-07-06 Procédé d'émission pour réseau ultra-dense, station de base, équipement d'utilisateur et élément de réseau

Country Status (2)

Country Link
CN (1) CN106792950A (fr)
WO (1) WO2017088488A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108156589B (zh) * 2017-12-22 2022-01-25 横琴国际知识产权交易中心有限公司 一种基于家庭基站的寻呼方法及系统
CN113784368B (zh) * 2020-06-10 2023-08-15 中国移动通信集团湖北有限公司 信令风暴的防控方法及计算设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102883386A (zh) * 2012-09-04 2013-01-16 大唐移动通信设备有限公司 一种lte网络中的小区切换方法和装置
CN104168624A (zh) * 2014-08-01 2014-11-26 电信科学技术研究院 一种无线网络接入控制方法、设备及系统
CN104303548A (zh) * 2012-05-02 2015-01-21 高通股份有限公司 用于具有减少信令的已连接模式的装置和方法
CN105072648A (zh) * 2015-08-17 2015-11-18 清华大学 一种超密集组网移动负载的均衡方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102325353B (zh) * 2011-07-15 2014-03-12 大唐移动通信设备有限公司 一种在切换过程中选择目标小区的方法及设备
CN102333342A (zh) * 2011-09-23 2012-01-25 大唐移动通信设备有限公司 一种小区业务处理方法及装置、设备
CN102883408B (zh) * 2012-09-21 2017-04-05 中兴通讯股份有限公司 一种小小区的发现方法和装置
WO2015038097A1 (fr) * 2013-09-10 2015-03-19 Hitachi, Ltd. Groupement de stations de base et de stations mobiles dans des réseaux hétérogènes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104303548A (zh) * 2012-05-02 2015-01-21 高通股份有限公司 用于具有减少信令的已连接模式的装置和方法
CN102883386A (zh) * 2012-09-04 2013-01-16 大唐移动通信设备有限公司 一种lte网络中的小区切换方法和装置
CN104168624A (zh) * 2014-08-01 2014-11-26 电信科学技术研究院 一种无线网络接入控制方法、设备及系统
CN105072648A (zh) * 2015-08-17 2015-11-18 清华大学 一种超密集组网移动负载的均衡方法

Also Published As

Publication number Publication date
CN106792950A (zh) 2017-05-31

Similar Documents

Publication Publication Date Title
EP3824669B1 (fr) Communication de résultats de mesures précoces dans les réseaux sans fil de prochaine génération
JP5714124B2 (ja) 測定能力の報告方法及びｕｅ
JP5739912B2 (ja) 付加的な測定結果の報告方法及びシステム
KR101611498B1 (ko) 무선 통신 시스템 및 무선 통신 시스템에서의 방법
US10893504B2 (en) Paging method and apparatus
JP7097963B2 (ja) ＰｃｅｌｌまたはＰＳｃｅｌｌを管理するための方法および装置
EP2863703B1 (fr) Fournir de l'information de cellule pour les dernières N cellules visitées à partir d'un équipement d'utilisateur à un noeud de contrôle du réseau
WO2018045573A1 (fr) Procédé de gestion de mobilité de terminal, dispositif réseau et terminal
CN102740381A (zh) 信息处理方法和装置
CN102378242A (zh) 载波聚合切换过程中生成最优小区列表的方法及装置
CN102137430A (zh) 一种上报mbms业务状态的方法及装置
CN108093448A (zh) 一种小区切换方法、终端及存储介质
US20150163706A1 (en) Method and system for performing cell reselection
US20130286829A1 (en) Base station and communication control method
WO2011032380A1 (fr) Procédé de transmission d'informations entre une station de base et des stations de base voisines
CN107959984A (zh) 物联网中的rrc连接重建方法、基站和用户终端
JP2019525649A (ja) ページングメッセージの送受信方法及び関連装置
US20180249476A1 (en) Method for switching transmission time interval, user equipment, and evolved nodeb
WO2017088488A1 (fr) Procédé d'émission pour réseau ultra-dense, station de base, équipement d'utilisateur et élément de réseau
CN101772113B (zh) 切换方法及基站节点
WO2018045572A1 (fr) Procédé d'accès pour terminal et dispositif de réseau
US20220095348A1 (en) Method of determining scheduling terminal, terminal and network side device
US10873848B1 (en) Systems and methods providing a station with a suggestion to transition from Wi-Fi to LTE
WO2015062478A1 (fr) Procédé, système et dispositif de communication
US10356676B2 (en) Resource switching method, apparatus, and system

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: 16867715

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: 16867715

Country of ref document: EP

Kind code of ref document: A1