EP2412147A1 - Systeme de fourniture de service tel qu'un service de communication - Google Patents
Systeme de fourniture de service tel qu'un service de communicationInfo
- Publication number
- EP2412147A1 EP2412147A1 EP10716572A EP10716572A EP2412147A1 EP 2412147 A1 EP2412147 A1 EP 2412147A1 EP 10716572 A EP10716572 A EP 10716572A EP 10716572 A EP10716572 A EP 10716572A EP 2412147 A1 EP2412147 A1 EP 2412147A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connection
- terminal device
- service
- service provider
- communication network
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
- H04L63/0227—Filtering policies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
Definitions
- Service provision system such as a communication service
- the invention relates to a service delivery system, such as a communication service.
- the invention relates to a remote monitoring system, in particular via the Internet.
- This Client-Server architecture designates a communication mode between several nodes of a communication network that distinguishes one or more terminal nodes (computers, IP phones, IP camera, IP sensors, etc.) from a server node (service platform , content server, etc.).
- This architecture is based on the fact that each terminal node includes client means for sending requests to a server and that the server is initially passive listening to the client terminal nodes.
- the server may be specialized depending on applications in application server, files, terminals, electronic mail, video surveillance platform.
- the client issues requests to a server, which may be a web server or http server of the name of the communication protocol used at the application network layer.
- the role of the server is to process the request and return the response to that request.
- the dialogue between client and server is often carried by a transport network layer, such as the TCP layer of the name of a communication protocol: the TCP protocol.
- TCP is a reliable transport protocol according to RFC 793.
- the respective client and server operating modes of the nodes apply to all the transport and application network layers, which correspond, for example, to the respective protocols TCP and HTTP: the client of a service is also the client in term of connection, the server of a service is also the server in terms of connection (the layers Client and Server transport need to be connected to enable service).
- the server operates in passive openness, i.e. an access point to a TCP connection is open, namely that it is made available to a TPC connection, and the server goes on passive waiting for connection requests.
- the client makes an active opening to know that it establishes a connection with the server by sending a connection request to the server with its initial client sequence number, that the server responds with an acknowledgment of the request client with its initial server sequence number and the client initial sequence number incremented and that the client acknowledges with the incremented server sequence numbers and client incremented again.
- More and more devices are being installed in private communications networks or LANs for Local Area Network in English. These private networks are connected to the public communication network to which the servers generally belong or to the public network providing the connection between the LAN and the network environment hosting the servers via an access device also called an access gateway. .
- the access gateway makes it possible to access the communication terminals of the private private communication networks remotely via a public communication network such as an open and / or shared network, particularly of the Internet type.
- the access gateway provides the interconnection between the private network hosting these terminals and the public communication network.
- the gateway implements network address translation functions and inbound communication filtering functions in the private communication network.
- NAT network address translation
- PAT network address to port address translation
- the server may be able to control a video stream or the movement of a camera at any time. And, if the address translation functions of this camera are not configured in the access gateway in front of this camera, the monitoring server can not do anything.
- the filtering functions implemented at the level of the access gateways making it possible to secure the private communication network vis-à-vis the public communication network are also there to limit the external accesses entering the private communication network. . So if these filtering functions are not configured, the monitoring server does not have access to the cameras that allow it to monitor.
- mappings between network addresses and port addresses and filtering are activated only temporarily in most cases, with the traffic flow resetting the temporary activation timer, also known as a timer.
- This temporary activation is incompatible with certain services, particularly require the server to repeatedly fetch (at any time, at any time, periodically, etc.) items from devices behind such access gateways after long period of traffic inactivity that caused the deactivation correspondences.
- Mechanisms such as the heartbeat mechanism (or keepalive in English) make it possible to maintain NAT traversal and thus the connection between the server and the client. These mechanisms are based on periodic messages exchanged between the server and the client at the initiative of the server when the service requires a permanent connection. These mechanisms pose scale scalabilty problems, that is to say dimensioning problems when the server dialogue for this service with a large number of clients since the server must then manage the monitoring. and maintaining as many connections as customers.
- the service provider may also be prohibited by law or contract from having the right to configure the translation and filtering functions of an access gateway, particularly when the service provider is not the owner and / or operator of the gateway. access. This limits the provision of certain services only to customers of the same ISP.
- One of the aims of the present invention is to overcome disadvantages of the state of the art.
- An object of the invention is a terminal device of a communication network comprising: means for establishing a connection with a service provider device through at least said communication network, and
- Application server means capable of receiving a service request from said service provider device on said connection.
- the terminal device can be accessible from a service provider device as soon as it is put into service.
- the fact that the terminal device initiates the connection for a service secures access to the data of the terminal device concerning this service.
- said communication network is a private communication network comprising an access device allowing the means for establishing a connection to establish said connection between said terminal device and said service provider device through the private communication networks. and public.
- connection being an outgoing connection, it is not filtered by the access device and the terminal device is still accessible by the service provider device to respond to a service request. And, the access device continues to play its role of securing the private communication network.
- this connection advantageously allows bidirectional traffic between the terminal device and the service provider device.
- the invention also relates to a service provider device of a communication network comprising:
- Connection means for enabling a terminal device to establish a connection with said service provider device through at least said communication network
- the subject of the invention is also a method of putting into service the application server means of a terminal device of a communication network comprising the establishment of a connection by said terminal device with said service provider device through said network. communication, said connection allowing said service provider device to transmit to said application server means of said terminal device a service request.
- the connection establishment is renewed after each break of said connection between said terminal device and said service provider device.
- the service provider device can still access the terminal device even after a reset of the terminal device, a network cutoff ...
- connection is a connection in permanent mode.
- the terminal device less frequently reconnects with the service provider device.
- said connection is an encrypted connection.
- the data exchanged on the connection can only be read by the terminal device and the service provider device.
- Another object of the invention is a computer program comprising program code instructions for executing the steps of the method of commissioning the application server means of a terminal device when said program is executed by a processor.
- the invention also relates to a system for providing a service in a communication network comprising at least this terminal device and this service provider device.
- FIG. 1 a block diagram of a terminal device according to FIG. invention
- FIG. 2 a block diagram of a service platform according to the invention
- FIG. 3 an architecture diagram of a service provisioning system in a public communication network according to the invention
- FIG. 4 an architecture diagram of a service provisioning system with at least one terminal device placed behind an access device according to the invention
- FIG. 5 a diagram of the exchanges in particular the commissioning of the application server means of a terminal device according to the invention.
- the invention will be more particularly described in the context of a video surveillance application. In general, it applies in all fields of application where a terminal operates by exchanging data with a remote device on a service. Other applications such as tele-home automation services, security services, etc. may also use the invention.
- the invention proposes to provide a new structure of the devices view of client-server architectures in terms of connectivity and application.
- FIG. 1 illustrates an exemplary terminal device 1, in particular an IP terminal (abbreviation of Internet Protocol in English or protocol
- the terminal device operates in "server” mode at the application level through the application server means 12.
- the application server means 12 of the terminal once attached, respond to the received service request.
- the terminal device 1 establishes a connection 31 by means of establishing a connection 11 with a provider device remote service (not shown in Figure 1).
- the terminal device 1 knows, prior to the establishment of the connection 31, the service provider device 2 with which it wishes to establish this connection, for example having previously identified by its address. In the case of a video surveillance application, the terminal device 1 can either receive this identification by manual entry, or by direct transmission or via a network when registering with the video surveillance service, etc.
- the terminal device 1 then mixes the roles of "client” and “server” according to the application level: from an application service point of view (at least protocols and services, including http service), the terminal device 1 is in "server” mode. It comprises application server means 12 and 17, such as at least one WEB server or http 12 and, where appropriate, a stream streaming server 17 or any other type of application service including the Internet such as an FTP server (not shown).
- application server means 12 and 17 such as at least one WEB server or http 12
- a stream streaming server 17 or any other type of application service including the Internet such as an FTP server (not shown).
- the terminal device 1 is positioned in "client" mode.
- the terminal device 1 comprises means for establishing a connection 11 coupled to the input / output means 13.
- the means for establishing a connection 11 of the terminal device 1 are at the same time. initiative of the connection 31 of the terminal device 1.
- the terminal device 1 is a camera comprising capture means 16, possibly means 15 for storing the captured images and moving means 14.
- the application server means 12 can receive requests services such as: requests for transmitting video streams of camera movement commands, in particular for PTZ type cameras, requests for a previously recorded video file - etc.
- the application server means 12 may, in particular, either be responsible for transmitting themselves the video stream coming from the capture means 16 via the input / output means 13 and the connection 31, either to control streaming server means 17 to effect this transmission of the video stream coming from the capture means 16 via the input / output means 13 and the connection 31.
- the application server means 12 may, in particular, transmit a command cmd to the displacement means 14 in order to orient the camera 1 with respect to the object to be filmed.
- the camera can be constantly controlled remotely through the invention.
- the application server means 12 may, in particular, search the database 15 for images to form a video file corresponding for example to a time slot or a stored video file. to transmit it via the connection 31.
- FIG. 2 illustrates a service provider device 2, constituting, for example, the service provider device with which the terminal device of FIG. 1 communicates via a connection 31.
- the service provider device 2 comprises connection means 21 connected to the input / output means 23 adapted to receive a connection establishment request and to enable the establishment of the connection 31.
- the service provider device 2 further comprises means for transmitting a service request 22 through the input / output means 23 via a connection 31 to a terminal device.
- the transmission means 22 are able to issue service requests such as requests for transmitting video streams of the camera movement commands, in particular for cameras PTZ type, requests for a previously recorded video file etc.
- the service request transmission means 22 is also means for receiving a response to said service requests.
- the service request transmission means 22 are able to receive the required video stream transmitted by the application server means 13 or 17 of the terminal device 1 via the connection 31.
- the service provider device further comprises processing means connected to the service request transmission means 22 for receiving data to be processed according to the responses to said service requests.
- the processing means 28 exploit the resources of the cameras and may include image processing means, searching means in the specific data image, archiving means, etc.
- Figure 3 illustrates an architecture of a service delivery system in a public communication network 3.
- the service provider architecture includes: A terminal device 1 constituted by different layers: a physical layer 19- t , a network level 2 layer 192, a network level 3 layer 19 3 , a connection layer in "client” mode comprising means for establishing a connection 11, an application layer in "server” mode comprising at least application server means 12.
- the terminal device 1 comprises sensor means 16.
- a service provider device 2 constituted by a public network equipment 3 (or shared network) remote in this network of the terminal device 1 and constituting a service platform.
- This service provider device 2 is also constituted by various layers: a physical layer 29i, a network level 2 layer 292, a network level 3 layer 29 3 , a "server" mode connection layer comprising connection means 21, an application layer in "client” mode comprising at least means for transmitting a service request 22.
- connection establishment means 11 of the connection layer, in particular the TCP client, of the terminal device 1 issue a connection request reqi to the connection layer connection means 21, in particular the TCP server, of the service provider device. 2 (previously identified).
- This request reqi triggers the establishment of the connection 31, in particular permanent TCP connection, of the terminal device 1 with the service provider device 2 through the network 3.
- a permanent connection TCP implements, in particular a mechanism such as the mechanism "keepalive” so as to allow a permanent accessibility from the remote device service provider 2.
- the permanence of the connection is at the initiative of the application server means 12 for the services requiring such a connection.
- the connection establishment means 11 of the terminal device that implement the mechanisms such as "keepalive" by monitoring the connection and exchanging messages regularly or regularly with the connection means 21 of the provider device. of service 2. Since the permanence mechanism is the responsibility of the terminal device 1, there is no problem of dimensioning.
- connection 31 the service provider device 2 is then able to contact the terminal device 1 at any time for a service request req 2 sent by its service request transmission means 22 to the application server means. 12 of the terminal device.
- the connection 31 being bidirectional, it allows the application server means 12 to respond to the service request req 2 .
- FIG. 4 illustrates an architecture of a service provisioning system with at least one terminal device placed behind an access device.
- the service provider architecture again includes:
- a terminal device 1 constituted by different layers: a physical layer 19i, a network level 2 layer 19 2 , a network level 3 layer 19 3 , a connection layer in "client” mode comprising means for establishing a connection 11 , an application layer in "server” mode comprising at least application server means 12.
- the terminal device 1 comprises sensor means 16.
- a service provider device 2 constituted by a public network equipment 3 (or shared network) remote in this network of the terminal device 1 and constituting a service platform.
- This service provider device 2 is also constituted by various layers: a physical layer 29- ⁇ , a network level 2 layer 29 2 , a network level 3 layer 29 3 , a connection layer in "server” mode comprising means for connection 21, an application layer in "client” mode comprising at least means for transmitting a service request 22.
- connection layer connection 11 in particular client TCP 1 of the terminal device 1
- connection layer in particular TCP server
- service provider device 2 (previously identified) via an access device such as a gateway (including an ADSL gateway such as a box) 5 which filters the incoming information in the local network 4 or private or LAN (for Local Access Network in English).
- This request reqi triggers the establishment of the connection 31, in particular permanent TCP connection, of the terminal device 1 with the service provider device 2 through the network 3.
- the request reqi being an outgoing request, it is not filtered by the access device and thus allows the systematic establishment of the connection 31 which would not be the case if the connection establishment request came from the service provider device 2.
- the service provider device 2 is then able to contact the terminal device 1 at any time for a service request req 2 sent by its service request transmission means 22 to the application server means. 12 of the terminal device.
- the incoming requests from the service provider device 2 via this connection 31 are automatically authorized to enter the local network 4 by the access device 5.
- an access device 5 allows global filtering, for example NAT, of incoming requests in the private communication network 4 and limits the risks of intrusion, in particular by having a process of identification of the provider device.
- remote service 2 process prior to the establishment of a connection 31 as provided in the literature for the NAT traversal during the establishment of TCP connection).
- connection 31 at the initiative of the terminal device 1 makes it possible to configure a correspondence table or IP address mapping in accordance with the general operating principles of the NATs in the access device 5.
- This mapping retains the interest to use only one IP address, the public IP address of the access device 5, to join the terminal.
- the addressing of the cameras is conditioned by the use of a single public IP address, in the occurrence of the access device 5: the ADSL gateway.
- the solution is compatible regardless of the access device.
- connection 31 secured by encryption including SSL encrypted TCP connection and associated protocols (TLS, DTLS), makes it possible to reinforce the security of the transmission, in particular to guarantee the confidentiality of the videos, while using the same principle of the server client inversion invention between the connection layer (11 of the terminal device side and 21 of the service provider device side) and the application layer (12 of the terminal device side and 22 of the service provider device side).
- SSL encrypted TCP connection and associated protocols TLS, DTLS
- FIG. 5 illustrates exchanges, in particular during the commissioning of the application server means 12 of a terminal device 1.
- the means for establishing a connection 11 of the terminal device transmit via the access device 5 on the network 3 to a device service provider 2 previously identified a request to establish connection reqi c.
- the connection means 21 of the service provider device 21 being in passive opening O, they are listening to such request and respond acki s.
- the connection is established shown in the figure by the tunnel between the connection layers 11 of the terminal device 1 and 21 the service provider device 2.
- the service provider device 2 by its service request transmission means 22 can transmit to the application server means 12 of the terminal device 1 service requests such as: camera movement commands constituting the terminal device 1 req 2 cmd (14, R30 °) (here, translational control of 14 units and rotation to the right of 30 °) to which the application server means 12 can respond, for example, by transmitting the flow of the camera moved f / cmd; queries of a previously recorded video file req 2 fic (dh) to which the application server means 12 respond by transmitting the requested file fic (d, h); requests for video stream transmission req 2 f to which the application server means 12 respond by transmitting the requested stream f2 (a request for end of stream req2 stop f service request transmission means 22 for terminating the transmission of the stream); - etc.
- camera movement commands constituting the terminal device 1 req 2 cmd (14, R30 °) (here, translational control of 14 units and rotation to the right of 30 °) to which the application server means 12
- the principle used by the invention to establish the connection by the terminal device to then receive service requests from a service provider device makes it possible to establish for the identified service provider device permanent and secure accessibility to the terminal device via including an open (internet) or shared network.
- the proposed solution is independent of gateways and transparent for it and scalable.
- the invention provides, as part of the provision of service using such terminals, a universal response to the crossing problem NATs.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Multimedia (AREA)
- Medical Informatics (AREA)
- Computer Hardware Design (AREA)
- Computer Security & Cryptography (AREA)
- General Engineering & Computer Science (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Telephonic Communication Services (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0951839 | 2009-03-23 | ||
| PCT/FR2010/050522 WO2010109128A1 (fr) | 2009-03-23 | 2010-03-23 | Systeme de fourniture de service tel qu'un service de communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2412147A1 true EP2412147A1 (fr) | 2012-02-01 |
Family
ID=41508324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10716572A Ceased EP2412147A1 (fr) | 2009-03-23 | 2010-03-23 | Systeme de fourniture de service tel qu'un service de communication |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9900373B2 (fr) |
| EP (1) | EP2412147A1 (fr) |
| WO (1) | WO2010109128A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103167033B (zh) * | 2013-03-11 | 2015-11-18 | 深圳创维-Rgb电子有限公司 | 远程监控管理的方法及系统 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040028391A1 (en) * | 2002-06-13 | 2004-02-12 | David Black | Internet video surveillance camera system and method |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070078978A1 (en) * | 1998-06-01 | 2007-04-05 | Sri International | Method and apparatus for updating information in a low-bandwidth client/server object-oriented system |
| US7576770B2 (en) * | 2003-02-11 | 2009-08-18 | Raymond Metzger | System for a plurality of video cameras disposed on a common network |
| WO2000036807A2 (fr) | 1998-12-18 | 2000-06-22 | Cybersigns, Inc. | Reseau prive virtuel chiffre servant a acceder a des detecteurs a distance |
| US20080106597A1 (en) * | 1999-10-12 | 2008-05-08 | Vigilos, Inc. | System and method for storing and remotely retrieving surveillance video images |
| US6954790B2 (en) * | 2000-12-05 | 2005-10-11 | Interactive People Unplugged Ab | Network-based mobile workgroup system |
| US7120701B2 (en) * | 2001-02-22 | 2006-10-10 | Intel Corporation | Assigning a source address to a data packet based on the destination of the data packet |
| WO2002076003A2 (fr) * | 2001-03-19 | 2002-09-26 | Imesh Ltd. | Systeme et procede pour mecanisme d'echange de fichier de poste a poste a partir de multiples sources |
| CN1395383A (zh) * | 2001-07-10 | 2003-02-05 | 颜森辉 | 智能型全方位专家管理系统 |
| US7031327B2 (en) * | 2001-08-24 | 2006-04-18 | Permeo Technologies, Inc. | Network application association |
| US20040008249A1 (en) * | 2002-07-10 | 2004-01-15 | Steve Nelson | Method and apparatus for controllable conference content via back-channel video interface |
| US20040080624A1 (en) | 2002-10-29 | 2004-04-29 | Yuen Siltex Peter | Universal dynamic video on demand surveillance system |
| US20040252197A1 (en) * | 2003-05-05 | 2004-12-16 | News Iq Inc. | Mobile device management system |
| JP2004350014A (ja) * | 2003-05-22 | 2004-12-09 | Matsushita Electric Ind Co Ltd | サーバ装置、プログラム、データ送受信システム、データ送信方法、及びデータ処理方法 |
| US7020098B2 (en) * | 2003-05-28 | 2006-03-28 | Sprint Spectrum L.P. | Predictive reservation of a communication link for a packet-based real-time media session |
| US20080303903A1 (en) | 2003-12-02 | 2008-12-11 | Connexed Technologies Inc. | Networked video surveillance system |
| US7647430B2 (en) * | 2005-01-19 | 2010-01-12 | Microsoft Corporation | Remote command framework for devices |
| US20080158336A1 (en) * | 2006-10-11 | 2008-07-03 | Richard Benson | Real time video streaming to video enabled communication device, with server based processing and optional control |
| US8001236B2 (en) * | 2008-03-13 | 2011-08-16 | Sharp Laboratories Of America, Inc. | Methods and systems for content-consumption device monitoring and control |
-
2010
- 2010-03-23 US US13/258,942 patent/US9900373B2/en active Active
- 2010-03-23 EP EP10716572A patent/EP2412147A1/fr not_active Ceased
- 2010-03-23 WO PCT/FR2010/050522 patent/WO2010109128A1/fr not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040028391A1 (en) * | 2002-06-13 | 2004-02-12 | David Black | Internet video surveillance camera system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| US9900373B2 (en) | 2018-02-20 |
| WO2010109128A1 (fr) | 2010-09-30 |
| US20120086805A1 (en) | 2012-04-12 |
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