WO2002062017A1 - Procede de transfert de donnees entre un appareil de service et un serveur de gestiona distance - Google Patents
Procede de transfert de donnees entre un appareil de service et un serveur de gestiona distance Download PDFInfo
- Publication number
- WO2002062017A1 WO2002062017A1 PCT/IB2002/000284 IB0200284W WO02062017A1 WO 2002062017 A1 WO2002062017 A1 WO 2002062017A1 IB 0200284 W IB0200284 W IB 0200284W WO 02062017 A1 WO02062017 A1 WO 02062017A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- computer
- data
- service device
- files
- transferring data
- 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
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Classifications
-
- 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
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/0823—Network architectures or network communication protocols for network security for authentication of entities using certificates
-
- 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
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
Definitions
- the present invention relates to a method for transferring data between service apparatuses and a remote management server.
- the present invention relates more particularly to a file transfer method between a management server and the telephones of a public telephone network.
- a public telephone network consists of public telephones distributed over a given territory. Public telephones are connected to a communication network, constituted for example by the switched telephone network PSTN (acronym for Public Switching Telephone Network), with which they communicate
- PSTN switched telephone network
- This network could be of another type (ISDN, GSM, Internet, .
- a public telephone network generally includes one (or more) central computer or management server, hereinafter called PMS (acronym of the Anglo-Saxon term “Payphone Management”
- This PMS which is connected to the switched telephone network, has the function of exchanging data with the public telephone fleet.
- 25 activity report detailing the number and amount of transactions, etc. They also communicate in the form of an alarm the eventual occurrence of an event (breakdown, act of vandalism, etc.) requiring the intervention of a maintenance agent.
- the PMS transfers files to public telephones
- the present invention therefore aims to remedy these drawbacks by simplifying and rationalizing the transfer of data between a remote management server and service devices such as public telephones.
- the method according to the invention relates to the transfer of data from a service device, such as a public telephone, to a remote central computer, such as a management server, the service device being able to communicate the data to the computer through appropriate means of transmission.
- a service device such as a public telephone
- a remote central computer such as a management server
- the method for transferring data is characterized in that the data to be transferred from the service device to the remote computer is determined by the computer alone.
- the data are produced by appropriate software and hardware means and correspond to functions of supervision and control of the operation of the service apparatus, each data having to be transferred to said central computer. at a given rate specific to the nature of the function to which it corresponds.
- it comprises the following steps:
- the service device opens a communication transfer with said remote computer; - the service device provides a session code specifying to said computer the nature of the data it wishes to transfer;
- the computer having ensured the authenticity of the call from the service device (syntax check, by checking a secret code, by checking the range of products, etc.), then transmits instructions to the device as to what data should actually be transferred. - the service device then transfers the data requested by the computer back.
- the computer can also transmit instructions for transferring data to the service apparatus.
- the data to be transferred from the computer to the service device includes software means replacing or supplementing software means already installed in the service device.
- the data are transferred in the form of computer files.
- the files to be transferred from the service device to the computer include activity reports describing the transactions carried out by the service device during a given period or even reports alarms describing malfunctions affecting said service appliance.
- the file transfers between the computer and the service device are carried out using the TCP / IP communication protocol thus allowing the transfer through the Internet network.
- the data passes between the service appliance and the remote central computer by an FTP server.
- Figure 1 is a schematic view of a public telephone network used for the implementation of the method according to the invention. Only the elements of the public telephone network and its environment have been shown which are necessary for understanding the invention.
- FIG 1 there is shown a public telephone network 1.
- This network includes a fleet of public telephones 10 (the same fleet may include several tens to several thousand telephones, or even several tens of thousands, depending on the territorial coverage of the network).
- the telephones 10 are intended for use by self-service users and are therefore installed for this purpose in public places, such as the street, or semi-public places, such as shopping centers, airports, hotel lobbies, restaurants, shops, etc.
- This telephone network 2 is of analog switched type PSTN (Public Switching Telephone Network) or of digital switched type ISDN (Integrated Services Digital Network) .
- This network 2 can also be constituted by a mobile radiotelephony network, whatever its nature: GSM, CDMA, TDMA, AMPS, D-AMPS, or even by the Internet network or more generally by any communication network capable of transmit data (X25, Ethernet, etc.) as well as by any combination of such networks.
- These public telephones 10 can also be adapted to access information or service servers for the Web and the Internet, as well as information or service servers residing on private networks. Such access allows the operator, operating the network 1, to offer users a wide range of services, ranging for example and without limitation, from reading their e-mails to consulting local information (lists of doctors on duty in the public telephone area, etc.).
- the invention is not limited to public telephones offering such access to the Internet and to private servers.
- These public telephones 10 are moreover adapted to communicate with a server 5 also called PMS (acronym English- Saxon "Payphone Management System”) dedicated to the operation and management of the public telephone network 1.
- PMS cronym English- Saxon "Payphone Management System”
- the function of the PMS 5 is to exchange information with the fleet of public telephones 10 concerning their operation and more generally the operation of the public telephone system.
- the PMS 5 manages the initialization sessions of public telephones and establishes statistical data from information received from public telephones 10 (alarms, operating counters, etc.).
- the public telephones 10 and the PMS 5 are provided with appropriate means of supervision and of reception / transmission of information, these means which are in themselves known will not be described in more detail.
- These supervision and reception / transmission means are responsible for organizing the exchange of information between the public telephones 10, the PMS 5 and an FTP server 4 whose role will be detailed below, and in particular to control transfers of data or software, between public telephones 10 and FTP 4.
- the PMS 5 transfers to the public telephones 10 the files necessary for their operation, such as rate tables, configuration parameters (such as the type of dialing, the characteristics of the line, etc.), lists. opposition or monitoring of the means of payment used.
- the public telephones 10 transmit, for their part, information relating to their use, namely a daily report comprising data relating to the transactions carried out, to the traffic, an alarm report which makes it possible to report to the PMS 5 the occurrence of incidents or damage to their integrity, such as a breakdown in the card reader or a handset that has been torn off, so as to provide for the intervention of a surveillance agent, a status file characterizing the content of the telephone (such as the indications of the different versions of programs used by the microprocessor), etc.
- a server 4 is specifically designed and adapted to the transfer of files 4, called FTP (for File Transfer Protocol). From orders received by the PMS 5, each public telephone 10, which integrates a client FTP entity, will connect to FTP 4 and download or download the appropriate files.
- FTP File Transfer Protocol
- the public telephones 10 can connect to a PROXY 6 server, serving as a communication interface between the public telephones 10 and the PMS 5.
- a PROXY 6 server serving as a communication interface between the public telephones 10 and the PMS 5.
- the functions of the PROXY 6 will be described in more detail below.
- Each public telephone 10 therefore includes a certain number of particular elements inherent in a public telephone, in particular for ergonomics.
- display and data entry devices such as a screen 11 and a keyboard 12 with keys.
- the public telephone 10 implements software making it possible to exchange and represent information according to specific formats better adapted to its ergonomics, although operating according to the principles of hypermedia links.
- the telephones 10 are equipped with TCP / IP communication protocols in accordance with the technical recommendations of 1TETF ("Internet Engineering Task Force") .
- the PROXY 6 combines different functions.
- a first function consists in directing the requests from public telephones 10, according to the nature of these requests, to the corresponding servers. This is a re-routing function which makes it possible to store and update the list of addresses of the servers likely to be called by the telephones 10 only in the PROXY 6 and not in each of the terminals. 10, they only need to know the PROXY 6 address alone. This arrangement considerably facilitates maintenance operations for the telephone network 1.
- to communicate with the PMS 5 it suffices for a telephone to send a message to the PROXY 6, a message the content of which, for example "connection", is sufficient to be interpreted by the PROXY 6 as a message intended for the PMS 5. It is then up to the PROXY 6 to find the IP address of the PMS 5 in its memories and to transmit the message to it.
- a second function consists, when necessary, in translating the data or instructions transmitted by the telephones 10 into the format of the destination servers. So in the case of connections to the Internet and the Web, it is a question of translating the protocol used by public telephones 10 into the appropriate protocol (http, RMI, pop3 %), and vice versa to transfer information from the Web and from the Internet to phones 10.
- PROXY 6 Another function of the PROXY 6 is to control the syntax of the requests sent by the telephones 10 before retransmission and thus authorize authenticated accesses to the network further back (security). Another function is to establish reliable and authenticated information exchange sessions which consists, for example, in certain identification of the telephones 10 during an exchange of information with the servers, or even in encrypting the data in order to secure communication if necessary.
- PROXY 6 Another function of PROXY 6 is to control and regulate the exchange of information carried out via standard file transfers and in accordance with Internet protocols.
- the PROXY 6 also has the function of directing requests from public telephones to backup servers, in particular in the event of the unavailability of a server, thereby ensuring architecture redundancy.
- the PROXY 6 is inaccessible as a result in particular of maintenance operations, it is then possible to direct the daily reports of the corresponding public telephones 10 to another management server then available. This switching from one server to another is then completely transparent for public telephones 10 which do not have to manage emergency addresses themselves but only the address of PROXY 6.
- the redundancy of PROXY 6 itself East also possible avoiding communication breakdowns in the event of a breakdown.
- the PROXY 6 can consist of a PC-type computer running Windows NT (registered trademark) or even Linux, etc.
- Any request to connect to a server reaches the input port of the computer, which is listened to permanently by the PROXY 6, then is redirected to a working port.
- the request is then analyzed by a software application, for example in Java language (registered trademark) allowing the control and the establishment of a session in the protocol sense of the term.
- a standard interface (“socket") is then opened and the request is sent to the destination server, and vice versa.
- PROXY 6, the PMS 5 and the FTP 4 instead of being separate machines as in FIG. 1, can be grouped together in a single PC type computer for example.
- the public telephone network 1 and the various elements which compose it having been presented, we will now detail the method used to transfer data between the PMS 5 and the telephones 10.
- Each telephone 10 initiates the connection to the PMS 5 by a “CONNECT” type message generated by means of specific programs implemented by the microprocessors equipping the telephone 10.
- CONNECT type message generated by means of specific programs implemented by the microprocessors equipping the telephone 10.
- the process of connecting a telephone to the PMS 5, as well as that used to transfer data or the communication protocols used are known in themselves (and standardized) and will not be detailed further.
- the event triggering the connection of the telephone 10 to the PMS 5 can be of different types.
- the connection can be initiated manually by a maintenance agent, for example during the installation of a new telephone 10 in the network 1.
- the connection can be triggered automatically following, for example, the occurrence of an alarm (coin operated full, breakdown , vandalism, etc.), alarm generated by appropriate monitoring programs.
- the connection can also be triggered automatically for activity reports generated by appropriate supervision programs, reports providing statistics on the activity of the telephone 10 and intended for the operator of the network 1 in order to improve the functioning of the latter. .
- These supervision programs can publish their activity report at predetermined dates and times or even at times defined by the PMS 5.
- the telephone can also connect to the PMS 5 following the express request of the latter who gave the order during a previous call to phone 10 to connect for a given reason: for example for downloading files.
- This “CONNECT” connection message essentially comprises the following information: the identifier of the telephone 10, for example its telephone number;
- the type of session that is to say the context of the call: telecollection (activity report), download (file transfer to the phone, in general this is a given prior order by PMS 5), alarms, etc. ;
- this signature can for example be obtained by encryption by means of a cryptology algorithm of DES type (Data Encryption Standard) or of any other type (RSA, etc.).
- the telephone 10 thus has a list of standard sessions which a priori define the reason for the call to the telephone 10. In general and with the exception of the alarms, this call was programmed during a previous session.
- the PMS 5 then sends a first request for work to be carried out.
- This work request is mainly of three types: "DOWNLOAD” order to transfer files from FTP 4 to phone 10, "UPLOAD” order to transfer files from phone 10 to FTP 4 and "DISCONNECT” order to stop Communication.
- file transfer orders are formulated using the following protocol:
- ftp // uu: pw@163.285.6.45/u ⁇ load/ 123456-05-time.cess with: ftp / / request to open an FTP session, here as an example; uu: user name; - pw: password, name and password are used to operate the connection on the FTP;
- 05 type of telephone 10 retrieved from "CONNECT” (dynamic); - time (HH: MM: SS): current time to uniquely identify a file, thus avoiding conflicts related to the possible allocation of the same identifier to several phones, cess: unique identifier of the file to be transferred (for example 02 for a file containing transactions).
- IP address of the FTP server where to download the files indicates the source root directory (location) in which there are sub-directories associated with software objects (parameters, price table, advertising ...): work: plain sub-directory (to improve the readability of files) containing a specific type of object (price table, advertising, parameters); - aa-bbb-ccc-ddd.ee: name of the file to transfer.
- Each file to be transferred from FTP 4 to telephone 10 is given a name according to a determined syntax.
- each file can be given a name like "aa-bbb-ccc-ddd.ee" where:
- ccc is a three-digit number designating the revision of the file
- ddd is a three-digit number designating the file extension
- Each aa-bbb-ccc-ddd.ee file concerns a particular element of the set of software resources of the telephones 10.
- this data and programs are divided into three distinct groups of objects: software, parameter tables and rate tables.
- This list is obviously not exhaustive and can be increased depending on the functionality of the telephones (advertising, media, etc.).
- Such a division into three types of objects which aims to simplify the operation of the network by the operator, and in particular the handling of the PMS 5, is of course in no way limitative of the present invention, which still applies even if the data and programs are not differentiated according to separate groups.
- each separate group of objects is made up of a number of files.
- Each file corresponds to a modular division, that is to say it only deals with a given functionality or only a limited number of functionalities.
- a telephone line security module a coin management module (if the phone accepts coins), a module payment card management, a handset management module, a screen management module, a management module for charges received from the line, an energy management module, a modem management module, etc.
- the parameter tables are the characterizations of the telephone network to which the telephone 10 is connected, the authorizations for access to certain services, the different language fonts used for displaying the telephone: French, English, German, Spanish or still Arabic, Chinese, Russian, etc.
- This modularity of the files aims to allow the most precise and quickest interventions, especially for download operations.
- the files to be transferred from the telephone 10 to the FTP 4 can if necessary adopt the same syntax.
- the files to be transferred from the telephone 10 to the FTP are results files (status, activity report, alarm, etc.), they can therefore however adopt a different syntax than that of the files to be loaded into the telephones 10.
- the file transfer orders issued by the PMS 5 to the telephones 10 can comprise a single instruction and follow one another sequentially according to the following sequence: UPLOAD 1 ftp: / /uu:pw@163.285.6.45/upload/ 123456-05- time.01
- An order can also include several instructions UPLOAD ftp: / /uu:pw@163.285.6.45/upload/ 123456-05-time.01 ft ⁇ : // uu: pw@163.285.6.45/upload/ 123456-05-time.02 ftp: // uu: pw@163.285.6.45/u ⁇ load/ 123456-05-time.03
- the telephone 10 After receiving an “UPLOAD” or “DOWNLOAD” type order, the telephone 10 opens an FTP session with the FTP 4 whose address has been notified to it. The connection to FTP 4 in parallel to the current session is established with PMS 5 via PROXY 6. The phone then performs the transfer of file (s) requested from the FTP server (s) which has been notified to it. . Once the transfer of the file (s) is complete, the phone sends an acknowledgment message by which it confirms to the PMS 5 that the work has been done well or badly. Then he waits for a new order. If a new order is not received after a predetermined period of time, the phone disconnects the call.
- the PMS 5 can take advantage of the call from each telephone 10 for its daily activity report (also called telecollect) to operate the downloading of a program update ...
- the commissioning agent will systematically request certain information related to the configuration of the telephone 10 (for example a configuration file) and this through the launch of a dedicated session.
- the PMS will not only be able to transfer the requested file but also obtain other files in return, such as an active tariff table, a passive tariff table, a parameter table, a black list, a gray list, software, etc.
- the PMS 5 will not only be able to recover transaction files, operating counters and alarms, but also it will be able to download in return an active tariff table , a passive tariff table, a parameter table, a black list, a gray list, software, etc.
- the present invention therefore makes it possible to easily overcome networks and distribute servers as best as possible.
- the first order received by a telephone 10 from the PMS 5 relates to the transfer of a file also called STATUS specifying the references of the set or of the main files constituting its software resources . This subsequently allows the PMS 5, in the event of a possible malfunction, to determine the different versions of software used by the telephone 10.
- the PMS 5 In the exchanges between the PMS 5 and the telephones 10, the PMS 5 is always the decision maker as to the files transferred, it is the master. Due to the architecture described, the PMS 5 is able, on analysis of the precise call context of each telephone 10, to ask the latter for a given job, which can be freely and easily modified and adapted, in particular according to the wishes of the network operator 1.
- a script is a text file comprising a series of lines of instructions intended to be executed by the PMS 5.
- a script includes in particular the tree structure or directory where the files will be located, the list of these files as well as instructions such as interrupts or disconnections.
- file7 03-002-000-001.4A (file to load) groupl.
- file ⁇ 03-002-000-002.4B (file to load);
- S-disconnect hère group2.dir soft / v02r00e02 / group2 (group2: destination directory for a second batch of files) group2.
- file5 03-002 -000-001.7B (file to load) group2.
- This loading process has three stages: downloading the files to FTP 4, programming the various phones concerned and loading the files into the telephones from FTP 4.
- Several methods can be adopted for carrying out these three steps.
- the files are first loaded by the PMS 5 in FTP 4 as soon as the download process is started, the telephones 10 are then programmed by the PMS 5 one after the other at as and when they are connected to retrieve the files from the FTP 4, finally the telephones 10 transfer the files from the FTP 4 to their microprocessors.
- the stages of the download process are linked and the files are loaded into FTP 4 at the same time as the processing of the first telephone in the list is executed (launch of the current download session).
- the PMS 5 waits for the telephones concerned to appear.
- each telephone 10 on the network 1 connects regularly to the PMS 5 to send it a telecollection (or more irregularly for specific reports such as the occurrence of an anomaly).
- the PMS 5 identifies, in the telephone calling it, one of the telephones concerned by the file download operation which has been launched, it inserts into the various "UPLOAD" orders relating to the remote collection, an order " DOWNLOAD »specific.
- This order consists of asking the phone to download the files listed in the script.
- the PMS 5 can scan the instruction lines one after the other and execute the instructions, addressing itself alternately to FTP 4 and to phone 10 (DOWNLOAD 1, DOWNLOAD 2, DOWNLOAD 3, DOWNLOAD 4 , etc.).
- the script sequence can be done at once or in several times. If run in several times, the script includes intermediate instructions for disconnection. Upon receipt of this order, the telephone 10 interrupts the current session and calls back at a new predetermined time.
- This method offers great flexibility in file transfer, since this transfer can be done module by module or even functionalities by functionalities, which removes the constraints of the prior art, where the files were unique and global.
- This method makes it possible to standardize the transfer of files by proposing a single and general management mode for all of the objects to be transferred regardless of their nature or their number.
- This dynamic management mode by which phones execute transfers according to instructions issued by the PMS 5 and describing the work is therefore without impact either on the telephones or on the PMS 5, whereas according to the prior art a treatment procedure had to be developed specifically for each transfer.
- the illustrated embodiment has been given by way of example and is in no way limitative of all the solutions that can be implemented thanks to the present invention.
- the network of public telephones described above can be replaced by any network of service apparatuses having a need to transmit information in particular to a management server, for example parking meters, automatic distributors or even bank terminals.
- the PMS 5 can execute not the original script but a copy made specifically for this telephone.
- FTP 4 may not be part of the same machine or even the same network but could be located in other places (geographic distribution).
- the telephone 10 initiates the communication during which the file transfer will take place, this cannot be limiting of the present invention.
- Such communication can therefore also be initiated by the PMS 5.
- the PMS 5 informs the telephone 10 that a session of a given type of file transfer will start.
- the telephone 10 responds with a “CONNECT” message of the aforementioned type and the rest of the session takes place according to the procedure described above (“ACCEPT” then exchange of orders “UPLOAD”, “DOWNLOAD "Or” DISCONNECT "and acknowledgments).
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Computer Security & Cryptography (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Information Transfer Between Computers (AREA)
- Telephonic Communication Services (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002436718A CA2436718A1 (fr) | 2001-01-30 | 2002-01-29 | Procede de transfert de donnees entre un appareil de service et un serveur de gestiona distance |
| EP02701469A EP1366602A1 (fr) | 2001-01-30 | 2002-01-29 | Procede de transfert de donnees entre un appareil de service et un serveur de gestion a distance |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR01/01343 | 2001-01-30 | ||
| FR0101343A FR2820261B1 (fr) | 2001-01-30 | 2001-01-30 | Procede de transfert de donnees entre un appareil de service et un serveur de gestion a distance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002062017A1 true WO2002062017A1 (fr) | 2002-08-08 |
Family
ID=8859489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2002/000284 Ceased WO2002062017A1 (fr) | 2001-01-30 | 2002-01-29 | Procede de transfert de donnees entre un appareil de service et un serveur de gestiona distance |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1366602A1 (fr) |
| CA (1) | CA2436718A1 (fr) |
| FR (1) | FR2820261B1 (fr) |
| WO (1) | WO2002062017A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2847403B1 (fr) * | 2002-11-19 | 2005-02-25 | Schlumberger Systems & Service | Procede et dispositif de traitement de donnees echangees entre une pluralite de terminaux de service et un serveur de supervision |
| FR2857186B1 (fr) * | 2003-07-03 | 2005-10-14 | Schlumberger Systems & Service | Procede de routage d'appels d'un appareil de service vers un serveur de gestion |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2796233A1 (fr) * | 1999-07-09 | 2001-01-12 | Schlumberger Systems & Service | Systeme de telephonie a architecture ouverte |
-
2001
- 2001-01-30 FR FR0101343A patent/FR2820261B1/fr not_active Expired - Fee Related
-
2002
- 2002-01-29 CA CA002436718A patent/CA2436718A1/fr not_active Abandoned
- 2002-01-29 EP EP02701469A patent/EP1366602A1/fr not_active Withdrawn
- 2002-01-29 WO PCT/IB2002/000284 patent/WO2002062017A1/fr not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2796233A1 (fr) * | 1999-07-09 | 2001-01-12 | Schlumberger Systems & Service | Systeme de telephonie a architecture ouverte |
Non-Patent Citations (1)
| Title |
|---|
| WILLIAMS L D L: "PAYPHONE REMOTE MANAGEMENT SYSTEMS", BRITISH TELECOMMUNICATIONS ENGINEERING, BRITISH TELECOMMUNICATIONS ENGINEERING. LONDON, GB, VOL. 11, NR. PART 2, PAGE(S) 85-89, ISSN: 0262-401X, XP000297298 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1366602A1 (fr) | 2003-12-03 |
| CA2436718A1 (fr) | 2002-08-08 |
| FR2820261B1 (fr) | 2003-05-02 |
| FR2820261A1 (fr) | 2002-08-02 |
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