EP1782608A1 - Verfahren und system zur benutzerlokalisierung für dienste auf der grundlage von sip- oder h.323-protokollen mit dynamischer ip-adressen-zuweisung - Google Patents
Verfahren und system zur benutzerlokalisierung für dienste auf der grundlage von sip- oder h.323-protokollen mit dynamischer ip-adressen-zuweisungInfo
- Publication number
- EP1782608A1 EP1782608A1 EP05798459A EP05798459A EP1782608A1 EP 1782608 A1 EP1782608 A1 EP 1782608A1 EP 05798459 A EP05798459 A EP 05798459A EP 05798459 A EP05798459 A EP 05798459A EP 1782608 A1 EP1782608 A1 EP 1782608A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- terminal
- address
- user
- access
- identifier
- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
- H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1101—Session protocols
- H04L65/1104—Session initiation protocol [SIP]
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- 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
- H04L67/52—Network services specially adapted for the location of the user terminal
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- 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
- H04L67/56—Provisioning of proxy services
- H04L67/561—Adding application-functional data or data for application control, e.g. adding metadata
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/42348—Location-based services which utilize the location information of a target
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/42348—Location-based services which utilize the location information of a target
- H04M3/42357—Location-based services which utilize the location information of a target where the information is provided to a monitoring entity such as a potential calling party or a call processing server
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2242/00—Special services or facilities
- H04M2242/30—Determination of the location of a subscriber
Definitions
- the present invention relates to the deployment of architectures for the provision of Multimedia Internet Protocol (IP) services, such as IP telephony, real-time video or multimedia instant messaging services.
- IP Internet Protocol
- Such architectures are generally based on the implementation of initialization protocols and control of IP sessions such as Session Initiation Protocol (SIP) or Packet-Based Multimedia Communications Systems (H.323), as well as on the DHCP protocol. (Dynamic Host Configuration Protocol) for dynamic allocation of IP address to the user.
- SIP Session Initiation Protocol
- H.323 Packet-Based Multimedia Communications Systems
- DHCP Dynamic Host Configuration Protocol
- the user By connecting to a wire or wireless network providing an IP connection, the user obtains from an DHCP server an IP address that allows him to route his IP traffic and use IP signaling protocols such as SIP or H.323 .
- IP signaling protocols such as SIP or H.323 .
- the user uses a SIP or H.323 client installed on his terminal to register with a call server (SIP Server or Gatekeeper H.323), in order to access a service platform offering multimedia services over IP. Once registered, the user can notably initiate or receive voice over IP calls.
- the remote access procedures allow a user to move and find the multimedia services to which he has subscribed, regardless of the access network used, subject to agreements between the various actors (network provider access provider, Internet service provider, IP service provider, etc.).
- Calls to an emergency service must be routed to the call center nearest the caller, which requires knowing the location of the caller with certainty.
- a number of value-added services exploit the user's geographical location and / or network to adapt according to the location, the routing of incoming or outgoing calls, or the service offered to the user.
- the terminal 10 of the user is equipped with an interface to an access network enabling him to connect to an IP network via an access server 3. This connection can also be subordinated to a network.
- the terminal uses mechanisms provided by the DHCP protocol to obtain an IP address and to discover the information necessary for the configuration of the terminal accessing the network.
- IP transport layer DNS server address - Domain Name Server - IP address allocation lease duration, etc.
- the terminal is assigned an IP address.
- the SIP or H.323 client that the terminal 10 is equipped with sends a registration request to a call server 16 of the service platform.
- This recording may also be subordinated to an authentication 24 of the terminal and / or the user at the level of the service platform.
- the service platform which gives him the ability to make and receive calls, as well as to initiate multimedia sessions.
- Signaling protocols such as SIP and H.323 support nomadic users by their nature. These protocols implement a registration procedure allowing any user to register from any terminal and access network, provided of course that the user has sufficient rights.
- the service platform and the associated applications then have the IP address of the user and thus know its connectivity status.
- the IP address resolution it is possible to rely on the IP address resolution to determine the network to which an IP address has been assigned.
- the IP address is too unreliable information to certify the location of a user. For example, in the absence of an "anti-spoofmg" mechanism, it is simple for an attacker to steal the IP address of a terminal connected to the IP network via a radio interface.
- the IP address assigned by the DHCP procedure belongs to a private IP network and a NAT (Network Address Translator) function is implemented
- the IP address seen by the service platform is a public IP address assigned by the NAT function and not the private IP address (unknown to the public network) that has been assigned to the terminal for the current access. The IP address does not correspond to that used by the terminal of the user or the equipment to which the terminal is connected.
- the present invention aims to overcome this drawback by exploiting the precise information available to access network operators on the - A - geographical configuration of the access points to their network, in order to provide reliable and accurate information on the network and geographical location of a terminal from which a user registers.
- This objective is achieved by the provision of a method of locating a user terminal by an IP service to which the terminal can access via an access network, comprising the execution of a procedure for accessing a user terminal. allocating an IP address to the terminal, during which an IP address is assigned to the terminal.
- a database stores the IP address assigned to the terminal, in association with a terminal or user identifier and an identifier of an access point of the terminal to the access network, the access point. being associated with location information, and the database transmits the location information associated with the identifier of the terminal or the user to the service.
- the terminal transmitting a request message from an IP address to an address server, it inserts the identifier of the terminal or the user in said request message of an IP address.
- the terminal sends a request message from an IP address to an address server, via an access server, and the access server inserts the identifier of the access point in said request message of an IP address.
- the terminal accessing the service under a user identifier vis-à-vis the service
- the database stores the identifier of the user vis-à-vis the service in combination with the information already associated to the terminal or user identifier
- the service obtains the location information of the terminal from the user's identifier with respect to the service.
- the location information of the terminal is automatically notified to the service in the event of a change in the database.
- the identifier of the terminal or the user is a random number generated by the terminal.
- the database obtains the location information of the terminal from an information system of an access network operator and IP transport, using the access point identifier.
- the invention also relates to a database accessible to at least one IP service for locating a user terminal connected to an IP transport network via an access network, arranged to
- the database is arranged to send a request for the location of a user to an information system of an IP access and transport network operator, said request containing a point identifier. access by which the terminal is connected to the access network.
- the invention furthermore deals with an IP address server for an IP transport network to which at least one access network is connected, comprising means for allocating an IP address to a terminal at the access thereof. to the IP transport network and means for receiving an IP address request transmitted by the terminal when it accesses an IP service, the IP address server further comprising:
- the invention also relates to an access server intended to be connected to an access network and to an IP transport network, to allow access of a terminal to an IP service via the network. access and the transport network, the access server comprising means for receiving and retransmitting to an IP address server an IP address request sent by a user terminal, means for inserting into the request of IP address received an identifier of the access point of the terminal to the access network, before retransmitting the request to the IP address server.
- the invention furthermore relates to a terminal for access to at least one IP service via an access network and an IP transport network, comprising means for sending an address request. IP to an IP address server and means for inserting in said request an identifier of the terminal or the user.
- the terminal there is provided means for generating a random number used as the identifier of the terminal.
- Figure 1 schematically shows a system for accessing services based on SIP or H.323 signaling protocols
- FIG. 2 diagrammatically represents a generic access diagram for multimedia services based on the SIP or H.323 protocols, according to the prior art
- FIG. 3 illustrates, in the form of a flow diagram, a procedure according to the invention of dynamic allocation of IP address when an attempt is made to access a user terminal to a multimedia IP service;
- FIG. 4 illustrates in the form of a flow diagram a procedure for registering a user with a multimedia IP service, according to the invention
- Figure 5 illustrates in the form of a flow diagram several procedures for obtaining location information of a user.
- FIG. 1 represents a system allowing users equipped with terminals 10 to access multimedia IP services, the session control of which is based on the SIP or H.323 signaling protocol.
- Such services are usually delivered by service platforms comprising a call server 16 and an application server 17, the platforms being hosted in the IP network 15 of the service provider.
- service platforms comprising a call server 16 and an application server 17, the platforms being hosted in the IP network 15 of the service provider.
- the user equipped with a terminal 10 must have access to an IP core or transport network 5, via an access network 1, 2 and an access server 3, 4.
- the IP transport network 5 comprises a DHCP server 6 and a signaling proxy 7 connected to the access servers, the DHCP server participating in the dynamic allocation of IP addresses to the access of the user terminals to the transport network 5.
- the invention proposes in particular to convey an identifier of the user or the terminal of the latter, during the procedures performed by the terminal of the user connected to the access network 1, 2 , to access a service offered by a multimedia IP service platform based on the SIP or H.323 protocol, and in particular during the DHCP procedure for allocating an IP address to the user, and the procedure of registration of the user with the service platform.
- the access networks 1, 2 and IP transport networks 5 comprise, according to the invention, a database 8 accessible to the access servers 3, 4, to the DHCP server 6 and to the signaling proxy 7, this database ensuring the correlation between the data of the users connected to the access network 1, 2, namely for each user, the identity of the user and the IP address that has been assigned to him for the connection, this database being updated through the IP transport network by the access server 3, 4, the DHCP server 6 and the signaling proxy 7, and being readable to the service platforms.
- the database 8 provides information on the characteristics of the access networks 1, 2 and on the geographical location of its various components, and in particular the access points to which the user terminals are connected, this information being obtained beforehand from an information system 9 of the operator of the access networks 1, 2.
- the identifier of the user or terminal that is conveyed during access to a IP multimedia service is initially used in the address allocation procedure by the DHCP server 6 at the access network, so that it is associated with the IP address assigned to the terminal 10 by the DHCP server.
- the assigned IP address and the identifier of the user or terminal are stored in the database 8, in association with the physical coordinates of the physical access point to which the user's terminal 10 is connected.
- the database 8 then makes it possible to determine the geographical coordinates of this physical access point.
- the identifier of the user or the terminal is transmitted to the signaling proxy 7 during the registration procedure of the user with the service platform.
- This arrangement allows the signaling proxy to update the database 8 with the service identity under which the user accesses the service.
- the procedure for registering the user with the service platform is standard. The user registers with his service identity.
- the service platform can obtain from the database 8 the location information associated with the service identity registered by the user. This location information can be obtained either in consultation mode or in notification mode. In consultation mode, the service platform transmits to the database 8 a query relating to the location information corresponding to the service identity of the user. In notification mode, this location information is dynamically notified by the database 8 to the service platform.
- Figure 3 illustrates the procedure according to the invention, IP address allocation by the DHCP server.
- the terminal 10 of the user inserts an identifier of the user or the "Client-ID" terminal serving as a correlation parameter in a DHCP_Discover request to be sent to the DHCP server 6, the terminal being equipped with an interface for this purpose.
- the identifier "Client-ID” is for example inserted in the "client-identifier” field (option code 61) of the DHCP messages.
- the DHCP_Discover message is broadcast in the access network 1, 2, which is connected to the terminal 10 of the user, to the DHCP server 6, this message containing the MAC address of the card terminal network ("chaddr" parameter), an identifier of the transaction ("xid” parameter) and the "Client-ID” parameter.
- this message is intercepted by the access server 3, 4 of the access network 1, 2 of the user, the access server then acting as a DHCP relay by storing the MAC address and the "Client-ID" identifier contained in the message.
- the access server inserts into the intercepted message an "Access-ID" identifier of the line to which the user's terminal is connected, for example in the "relay agent information" field.
- the DHCP server receives the DHCP_Discover message and sends back to the terminal a DHCP_Offer message containing the IP address proposed to the terminal ("yiaddr" parameter), this IP address being selected from an address pool which can be assigned to the access server 3, 4.
- the access server receives and retransmits this message to the terminal of the user.
- the user's terminal Upon receipt of this message in step 38, the user's terminal issues a DHCP Request message to request the DHCP server to use the IP address contained in the received DHCP_Offer message.
- DHCP_Request also contains the MAC address ("chaddr") of the terminal's network card, the identifier ("xid") of the transaction, and the "client-identifier” identifier.
- the access server intercepts this message, inserting the identifier of the "Access-ID" line, for example in the "relay agent information” field (step 40), and transmits it to the DHCP server. 6 (step 41).
- the DHCP server receives this message, extracts the information contained therein, namely, the IP address assigned to the terminal, the "Client-ID" identifier and the identifier of the access point. "Access-ID”, and transmits this information in an update request of the database 8.
- the database receives and stores this information and sends a confirmation message of their good reception in which it optionally provides the signaling proxies address to be contacted by the user to perform a SIP registration.
- This message is received in step 44 by the DHCP server which confirms to the user the right to use the IP address by sending to the terminal a DHCP_ACK message containing in addition, the authorized duration of use of the address IP and possibly other information such as addresses of signaling proxies and DNS servers to be used, this information being obtained from the database 8 or being stored internally by the DHCP server.
- the DHCP-ACK message is relayed by the access server to the terminal of the user 10.
- the terminal can register with a service platform in accordance with the registration procedure shown in Figure 4.
- the procedure shown in this figure is in accordance with the protocol SIP.
- a similar procedure can be illustrated and described in accordance with the H.323 protocol.
- the terminal uses the information received previously, namely, the assigned IP address, the address of the signaling proxy 7 to be used, to issue a registration message SIP_Register further containing the SIP identifier of the user of the form "Userl_Publicl@home.com” in the fields “from” and “to” ("home.com” designating the domain of the service requested by the user), as well as the identifier " Client-ID "used as correlation parameter between the two procedures, the latter being inserted for example in the" Digest-Username "parameter of the" Proxy Authorization "field of the SIP message.
- the SIP_Register message is transmitted to the signaling proxy 7 via the access server 3, 4 which is transparent at the SIP level.
- the signaling proxy receives this message and stores the identifier "Client-ID" in association with the user's SIP identifier, and retransmits this information in an update request message to the user.
- database 8 The "Client-ID" identifier enables the database 8 to store the user's SIP identifier in association with the other information stored for the user identified by "Client-ID".
- the database then confirms (step 54) the good reception of this information.
- the signaling proxy 7 removes the "proxy-authorization" field containing the identifier "Client-ID” from the received SIP-Register message and adds the "P-Visited-Network-ID” field identifying it. the access network 1, 2 to which the terminal of the user is connected.
- the signaling proxy 7 transmits the SIP_Register message thus modified to the call server 16 of the service requested by the user.
- the call server Upon receipt of this message, the call server performs a procedure 57 for authenticating the user. If the user is authorized to access the service, the call server transmits in step 58 a SIP_OK agreement message in response to the received SIP_Register message.
- the call server indicates in the "P-Associated-URI" field of the SIP_OK message that the identities concerned ("UserlJPublic2@home.com",
- the signaling proxy On receipt of the SIP_OK message (step 59), the signaling proxy examines the message content to discover the identifiers possibly associated with the registered identifier, and triggers an update of the database 8 with this information associated with the message. the "Client-ID" identifier to enable the database to complete the stored information concerning the user identified by "Client-ID". This information is received by the database 8 in step 60 which confirms their good reception. Upon receipt of this confirmation in step 61, the proxy retransmits the SIP_OK message to the access server 3, 4, which in turn retransmits the message to the terminal at step 62.
- the database 8 can retrieve information concerning the geographical location of a user, for example the postal address of the latter. For this purpose, the database 8 transmits, in a first step 71 of a location procedure, a request for the location of the user to the information system 9 of the operator of the access and data networks. IP transport to which the user is connected. This location request contains the Access-ID of the network access point to which the user is connected. In the next step 72, the information system returns the requested information.
- the call server 16 or a dedicated application server of the service platform may need location information (network or geographic) of the registered user under a given identifier.
- the database 8 can automatically notifying the call server or the application server of a geographical location change of a user registered under the identity "User l_Public l@home.com” (step 73).
- the name of the domain (or network) ("home.com") to which the server belongs, allows the notification message to be properly forwarded.
- the dedicated call or application server confirms the good reception of the location information.
- the server 16, 17 must then request (step 75) the database location information of a user having an identifier vis-à-vis the service of the form
- the database 8 of the access network to which the user is connected refers to the dedicated or dedicated application server 16 17 the geographic location information associated with the identity of the user. 'user.
- the invention can be implemented by implementing the DHCP protocol for the allocation of IP addresses in a private network, and a NAT function.
- the interface with the DHCP server 6 may be in accordance with the DHCP protocol.
- the selected call control protocol may be SIP.
- the database 8 of the access server can have two frontals accessible via the SOAP protocol (Simple Object Access
- Protocol one for the update and one for the consultation.
- the user identifier that is used to correlate the IP address allocation and registration procedures may be a random number generated by the user's terminal.
- the database 8 rejects an update request in step 43 if this random number used as identifier is already used in the database to identify a user. This rejection results in the rejection of the IP address allocation DHCP request.
- the terminal must then renew its IP address request with a new random number.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Library & Information Science (AREA)
- Business, Economics & Management (AREA)
- General Business, Economics & Management (AREA)
- Multimedia (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephonic Communication Services (AREA)
- Small-Scale Networks (AREA)
- Computer And Data Communications (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0409085A FR2874779A1 (fr) | 2004-08-25 | 2004-08-25 | Procede et systeme de localisation d'utilisateurs pour les services bases sur les protocoles sip ou h.323 avec attribution d'adresse ip dynamique |
PCT/FR2005/002099 WO2006024791A1 (fr) | 2004-08-25 | 2005-08-18 | Procede et systeme de localisation d'utilisateurs pour les services bases sur les protocoles sip ou h.323 avec attribution d'adresse ip dynamique. |
Publications (1)
Publication Number | Publication Date |
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EP1782608A1 true EP1782608A1 (de) | 2007-05-09 |
Family
ID=34947284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05798459A Ceased EP1782608A1 (de) | 2004-08-25 | 2005-08-18 | Verfahren und system zur benutzerlokalisierung für dienste auf der grundlage von sip- oder h.323-protokollen mit dynamischer ip-adressen-zuweisung |
Country Status (7)
Country | Link |
---|---|
US (1) | US8374187B2 (de) |
EP (1) | EP1782608A1 (de) |
JP (1) | JP4787834B2 (de) |
KR (1) | KR101106885B1 (de) |
CN (1) | CN101010924B (de) |
FR (1) | FR2874779A1 (de) |
WO (1) | WO2006024791A1 (de) |
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FR3057423A1 (fr) * | 2016-10-11 | 2018-04-13 | Orange | Procede de negociation d'une qualite de service offerte par une passerelle a des terminaux |
US10509921B2 (en) * | 2017-05-31 | 2019-12-17 | Intuit Inc. | System for managing transactional data |
FR3071995A1 (fr) * | 2017-09-29 | 2019-04-05 | Orange | Procede d'affectation d'une communication |
CN109802980A (zh) * | 2017-11-17 | 2019-05-24 | 华为技术有限公司 | 消息交互方法、相关装置及系统 |
US10999812B2 (en) | 2018-10-11 | 2021-05-04 | Comcast Cable Communications, Llc | Registration of multi-port device |
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US20040071164A1 (en) * | 2002-01-08 | 2004-04-15 | Baum Robert T. | Methods and apparatus for protecting against IP address assignments based on a false MAC address |
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US6650902B1 (en) | 1999-11-15 | 2003-11-18 | Lucent Technologies Inc. | Method and apparatus for wireless telecommunications system that provides location-based information delivery to a wireless mobile unit |
US6650901B1 (en) * | 2000-02-29 | 2003-11-18 | 3Com Corporation | System and method for providing user-configured telephone service in a data network telephony system |
US6977917B2 (en) * | 2000-03-10 | 2005-12-20 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for mapping an IP address to an MSISDN number within a service network |
JP2001326697A (ja) * | 2000-05-17 | 2001-11-22 | Hitachi Ltd | 移動体通信網、端末装置、パケット通信制御方法、及び、関門装置 |
WO2002076043A1 (fr) * | 2001-03-19 | 2002-09-26 | Sony Corporation | Systeme pour reseau |
US7139818B1 (en) * | 2001-10-04 | 2006-11-21 | Cisco Technology, Inc. | Techniques for dynamic host configuration without direct communications between client and server |
US7720044B1 (en) * | 2002-04-19 | 2010-05-18 | Nokia Corporation | System and method for terminal configuration |
EP1540885B1 (de) * | 2002-07-08 | 2008-02-20 | Packetfront Sweden AB | Dynamische portkonfiguration eines netzwerkgerätes |
US7519988B2 (en) * | 2003-07-31 | 2009-04-14 | International Business Machines Corporation | Method and apparatus for authenticated network address allocation |
US20050177616A1 (en) * | 2003-12-19 | 2005-08-11 | N2 Broadband, Inc. | Method and system for distributing services in a digital asset environment |
-
2004
- 2004-08-25 FR FR0409085A patent/FR2874779A1/fr active Pending
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2005
- 2005-08-18 CN CN2005800283936A patent/CN101010924B/zh not_active Expired - Fee Related
- 2005-08-18 JP JP2007528918A patent/JP4787834B2/ja not_active Expired - Fee Related
- 2005-08-18 EP EP05798459A patent/EP1782608A1/de not_active Ceased
- 2005-08-18 WO PCT/FR2005/002099 patent/WO2006024791A1/fr active Application Filing
- 2005-08-18 KR KR1020077006768A patent/KR101106885B1/ko not_active IP Right Cessation
- 2005-08-18 US US11/660,919 patent/US8374187B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040071164A1 (en) * | 2002-01-08 | 2004-04-15 | Baum Robert T. | Methods and apparatus for protecting against IP address assignments based on a false MAC address |
Also Published As
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JP2008511229A (ja) | 2008-04-10 |
KR101106885B1 (ko) | 2012-01-25 |
KR20070055564A (ko) | 2007-05-30 |
CN101010924B (zh) | 2013-06-05 |
CN101010924A (zh) | 2007-08-01 |
WO2006024791A1 (fr) | 2006-03-09 |
US20090034536A1 (en) | 2009-02-05 |
FR2874779A1 (fr) | 2006-03-03 |
US8374187B2 (en) | 2013-02-12 |
JP4787834B2 (ja) | 2011-10-05 |
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