EP1999927A2 - Method of supervising at least one tunnel set up for routing packets between a mobile router and a referring equipment item in a home network of the mobile router - Google Patents
Method of supervising at least one tunnel set up for routing packets between a mobile router and a referring equipment item in a home network of the mobile routerInfo
- Publication number
- EP1999927A2 EP1999927A2 EP07731829A EP07731829A EP1999927A2 EP 1999927 A2 EP1999927 A2 EP 1999927A2 EP 07731829 A EP07731829 A EP 07731829A EP 07731829 A EP07731829 A EP 07731829A EP 1999927 A2 EP1999927 A2 EP 1999927A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tunnel
- mobile router
- node
- network
- availability
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
Definitions
- mobile networks are networks having the particularity of being connected to the Internet via one or more routers, called mobile routers, which change their anchor points in the Internet topology. Examples include public transport access networks for passengers, sensor networks embedded in vehicles or personal networks.
- the Mobile IP protocol hereafter called MIP, makes it possible to manage a mobility of a mobile IP node, also called Mobile Node or MN, from an original IP subnet to another IP subnet, called a visited network. , during a displacement of the node. Any IP node has a permanent address, HoA for "Home Address" in English, in its original IP network, also called mother network.
- a node When a node moves to a visited network, it acquires a temporary address in this visited network, this address being conventionally called CoA for "Care-of Address".
- the MN mobile node indicates this temporary address to referencing equipment in its originally designated IP network to manage IP mobility.
- Such equipment is classically called a home agent or "Home Agent" in English, or HA.
- this home agent binds the permanent address HoA in the originating network and the temporary address CoA in the visited network.
- a bi-directional MIP tunnel is then implemented between the home agent HA of the originating network and the mobile node MN for routing the packets sent or received by the mobile node. It can thus receive at the temporary address CoA packets for the permanent address HoA in the original network.
- the mobile node MN is either an IP terminal or a mobile router MR hosting terminals. In the latter case, it is called a mobile network consisting of the mobile router and nodes connected thereto.
- a mobile router MR indicates to its home agent the temporary address assigned to it, it can also indicate the network prefixes attached thereto.
- a network prefix covers a set of IP addresses managed by the mobile router.
- the home agent HA redirects to the mobile router MR all of the packets intended for it and to nodes connected to the mobile network, whether they are fixed or themselves mobile, by encapsulating them from the HA home agent to the mobile router MR. Redirection occurs if the destination address of the packet is the permanent address of the mobile router or belongs to the network prefix managed by the mobile router.
- the mobile router MR can also accommodate a mobile node MN in its mobile network.
- a node residing in the mobile network or attached to it is not informed change of availability status of the tunnel.
- This break can be linked for example to a physical connection problem with the visited network or to a transmission problem between the visited network and the original network.
- a node is in communication with a data download service, i.e. a primarily downward service, from the service to the node.
- a data download service i.e. a primarily downward service
- Control Message Protocol that the packet could not be routed, the destination being inaccessible.
- the sending node is therefore informed only because it has requested the mobile network by wishing to send a packet and information that It is given only for the routing of that particular packet and not an indication of a state of availability of the tunnel.
- the loss of the tunnel can also be detected by mechanisms at the level of the application managing the service, these mechanisms also causing a delayed detection of the cut of the tunnel.
- a mobile node can then trigger on certain criteria the establishment of connectivity with another visited network, if it detects one. For the mobile node, a fast response is important so that, if possible, application service contexts can be maintained.
- the invention responds to this need by proposing a method of supervising at least one tunnel established for routing packets between a mobile router and a referencing device in an origin network of the mobile router, characterized in that it comprises :
- a node can react quickly.
- a tunnel unavailability notification a fixed node attached to the mobile router can inform an application service or a user locally.
- a mobile node meanwhile, can go into a state of research and establish a connectivity with another mobile network.
- a node may again request a service that has been suspended.
- the nodes are therefore informed spontaneously of a change of availability status of the tunnel, without the need to issue a request for this purpose.
- said sending step in which said sending step is implemented only after a predetermined period, during which no new change of availability state of the tunnel has been detected.
- the tunnel availability status change notification is transmitted only when a state of unavailability has been detected for a sufficiently long period, i.e. longer than a predetermined time, in order to avoid sending notifications of change of availability status of the successive tunnel.
- the method further comprises a step of replaying the notification to at least one second-rank node indirectly connected to the mobile router through a node that has received the notification.
- the invention also relates to a mobile router capable of establishing a tunnel for routing packets with a reference equipment of a home network to which it belongs when it is connected to a visited network, characterized in that it comprises: means for detecting a change in the state of availability of the tunnel;
- the invention also relates to a node connected to a mobile router, a routing of packets between the node and a network being effected by at least one tunnel established between the mobile router and a referencing device in an originating network of the mobile router, characterized in that it comprises
- the invention also relates to a signal supporting an at least one tunnel status change notification message sent by a mobile router to at least one node connected to the mobile router, said tunnel being established for a routing packets between the mobile router and a referencing equipment in an origin network of the mobile router, characterized in that it comprises a tunnel identifier and a field representative of a state of availability of the tunnel.
- FIG. 1 represents a diagram of a network architecture
- FIG. 2 illustrates a method of supervising a tunnel according to one embodiment of the invention
- FIG. 3A represents a mobile router according to the invention
- FIG. 3B represents a node according to the invention
- FIG. a status change notification message according to the invention.
- Mobility in the Internet generally considers the ability to move while remaining connected to an access network through equipment.
- the set of nodes on the same logical link is a subnet.
- a network prefix which identifies the position of the subnet in the hierarchy of the Internet. Subsequently, the terms network and subnet are used interchangeably.
- FIG. 1 shows a diagram of a network architecture.
- a mobile router 2 is connected to the IP network 1.
- This router 2 is mobile in the Internet and has established connectivity with the IP network 1 through a visited network not shown in FIG. 1.
- the mobile router 2 has a permanent IP address HoAl in its original network, not shown in FIG. 1.
- the permanent address corresponds to an identification address of the node. He obtained in the network visited a temporary CoAl address, called CoA for "Care-Of Adress" in English.
- the temporary address corresponds to a node location address in the IP network architectures. This temporary address belongs to the addresses assigned to the visited network.
- the physical layers used to establish the connection with the IP network can be of different types of wired or wireless technologies: cellular, satellite, IEEE 802.11b, ....
- the mobile router 2 When IP connectivity is established, the mobile router 2 contacts an equipment referencing 6 belonging to its network of origin and transmits to it the temporary address CoAl that it obtained in the visited network as it is specified by the IETF (for Internet Engineering Task Force in English) in the RFC 3775 with a "Binding Update" message.
- the equipment refer 6 manages the association permanent address-temporary address (HoAl-CoAl). Any packet to the mobile router 2 is routed by the network to the referencing equipment 6 which encapsulates the packet and routes the encapsulated packet to the visited network. The latter is in charge of routing the packet to the mobile router 2. Any packet sent by the mobile router 2 is transmitted as if it had been sent from the permanent address HoAl. It is then considered that a bidirectional tunnel TU for the routing of packets is established between the referencing equipment 6 and the mobile router 2.
- the mobile router 2 can accommodate so-called fixed terminals that are connected to it directly or indirectly, that is to say not having the ability to establish connectivity with a visited network. It tells the referring equipment 6 that it offers the routing function in the "Binding Update" message in accordance with IETF RFC 3963. Such a fixed terminal is shown in FIG. 1 as reference 3.
- the mobile router 2 can also indicate in the same "Binding Update” message the network prefix (s) it manages.
- the equipment referenced 6 of the mobile router 2 then supports the routing of packets to all addresses belonging to the network prefix managed by the mobile router 2 using the established tunnel TU.
- the mobile router 2 hosts a node 4 having routing capabilities.
- a mobile node 5 is attached to the node 4. It obtains from the mobile router 2 a temporary address CoA2 belonging to the network prefix managed by the mobile router and transmits it to its referencing equipment 7 in its own home network. So the packages to the mobile node 5 are routed to the equipment referenced 7 of the mobile node 5, retransmitted by it to the equipment referenced 6 of the mobile router 2, then to the mobile router 2 by the use of the established tunnel TU between the equipment refer to 6 and the mobile router 2.
- Two levels of mobility are shown in Figure 1 as an example. It is possible to have a higher number of mobility levels. Mobile nodes can also be connected directly to the mobile router 2.
- the method of supervising at least one tunnel established for routing packets between a mobile router and a referencing device will now be described with reference to FIG. 2.
- the bidirectional tunnel TU established between the mobile router 2 and equipment refer 6 will be supervised.
- a first step E1 of the method consists in continuously monitoring the state of availability of a tunnel. This supervision is done by mechanisms internal to the mobile router that will not be detailed here. It may be for example and non-exhaustively the processing of notifications issued by physical layers, received alarms indicating a failure of a physical card, problems on the link between the visited network and the original network. of the mobile router, ... These notifications may possibly only affect one direction of the tunnel but ultimately have an impact on the state of availability of the tunnel as a whole.
- step El remains active continuously.
- a second step E2 sends a notification of change of state of the tunnel.
- At least one node connected to the mobile router 2 is sent a TU tunnel availability status notification message 30.
- This notification message comprises at least one identifier 35 of the tunnel concerned and a field 34 representative of a state of availability of the tunnel.
- the "Neighbor Discovery" protocol specified in RFC 2461 of the IETF can be used to convey such a message. It is then necessary to add in the message "Neighbor Advertisement” an additional bit indicating the state of the tunnel according to its value. In this case, the identifier of the tunnel is implicitly included in the message, the message being sent by the mobile router 2.
- a new type of protocol capable of allowing the transmission in the mobile network of general information between the mobile router and the nodes connected to it.
- a notification message of change of a state of availability of a tunnel comprises the following information elements, with reference to FIG. 4: an information element 31 comprising a protocol identification an information element 32 comprising an identification of the sender of the message, - an information element 33 comprising an identification of at least one destination node of the message in "unicast" mode or a global identification of the mobile network, that is to say all the nodes connected, in said mode "multicast” or broadcast,
- an information element 34 comprising a state of availability of the tunnel, "available” or “unavailable”.
- the message 30 includes an information element carrying a tunnel identifier for which the change of availability status is notified.
- Optional elements may also be included in order to complete the tunnel information, for example and in a non-exhaustive way: an information element comprising information on the physical interface underlying the tunnel, an information element comprising a temporal information of the time elapsed between the detection of change of an availability state the tunnel giving rise to the sending of this message and the actual sending of the message,
- an information element comprising a description of the characteristics of the tunnel, for example, the tunnel flow rate, a temporal information of the duration of the elapsed activity of the tunnel, the address of the equipment referencing, an element TTL information for "Time to Live” in English defining the number of possible rebroadcasting of the notification message.
- step E2 the sending of the notification message in step E2 is delayed.
- a delay is armed at a predetermined value.
- the method stops the timer and returns to step E1 of monitoring the availability state of the tunnel.
- the state of availability of the tunnel remained throughout this period in a stable state "available” or "unavailable”.
- the notification message of change of a state of the tunnel is then sent.
- the predetermined value is chosen in such a way that the sending of the message is sufficiently delayed not to be triggered when the state of availability of the tunnel is not in a stable state and this sending however is carried out quickly enough to allow a node comprising search means of a new network to be able to do so and thus retain its application contexts.
- a test is carried out to detect whether the destination node of the message has communication capabilities. routing. If this is not the case, we move to a fifth step E5 of decision making.
- the change notification message of an availability state includes the information element TTL described above and only if its value is non-zero, proceed to this fourth step by decrementing the value of the TTL information element in the notification message.
- a fifth decision-making step E5 the notification message of change of availability status of the tunnel is taken into account by the node and the latter will decide the actions to be carried out.
- the fixed node 3 attached to the mobile router 2 may inform an application service or a user.
- a node having search means of a new network, for example the node 5, can take any action to connect for example to a new network.
- the notification message of a state of availability of a tunnel also makes it possible to notify to a node remained connected on the mobile network either because it does not comprise means of search either because it has decided to remain on the mobile network or in any other case that the state of availability of the tunnel has returned to the "available" state. For example, this node may request a service that was suspended again.
- a mobile router 2 as represented in FIG. 3A, comprises: means for establishing a physical connection with a visited network, these means possibly being of different types of wired or wireless technology such as cellular, satellite , IEEE 802.11b, ....
- means 11 for establishing a tunnel for routing packets with equipment referencing an originating network to which it belongs when it is connected to a visited network
- a node 3, 4, 5, as shown in FIG. 3B, connected to a mobile router 2 described above comprises:
- reception means 20 arranged to receive a notification of change of a state of availability of the tunnel.
- such a node 5 provided with means 21 for establishing a physical connection with a visited network also comprises means 22 for searching a new network. These means 22 for finding a new network are triggered following the receipt of the notification of a change of a state of availability of the tunnel.
- a node 4 performs the routing function for other nodes, it further comprises:
- - Replay means 23 arranged to rebroadcast the notification of change of availability status of the tunnel. These rebroadcasting means 23 implement step E4 of the method.
- the modules which implement the method described above, are preferably software modules comprising software instructions for executing the steps of the method previously described by the server.
- the software modules can be stored in or transmitted by a data carrier.
- This may be a hardware storage medium, for example a CD-ROM, a magnetic diskette or a hard disk, or a transmission medium such as an electrical signal, optical or radio, or a telecommunications network.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0651049 | 2006-03-27 | ||
PCT/FR2007/051017 WO2007110546A2 (en) | 2006-03-27 | 2007-03-26 | Method of supervising at least one tunnel set up for routing packets between a mobile router and a referring equipment item in a home network of the mobile router |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1999927A2 true EP1999927A2 (en) | 2008-12-10 |
Family
ID=37441695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07731829A Withdrawn EP1999927A2 (en) | 2006-03-27 | 2007-03-26 | Method of supervising at least one tunnel set up for routing packets between a mobile router and a referring equipment item in a home network of the mobile router |
Country Status (3)
Country | Link |
---|---|
US (1) | US20090067400A1 (en) |
EP (1) | EP1999927A2 (en) |
WO (1) | WO2007110546A2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014102035B4 (en) * | 2013-08-13 | 2020-09-17 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Computer device, system comprising a computer device and computer program |
US9894694B2 (en) * | 2014-06-25 | 2018-02-13 | Pismo Labs Technology Limited | Methods and systems for transmitting and receiving data through one or more tunnel for packets satisfying one or more conditions |
WO2016068905A1 (en) * | 2014-10-29 | 2016-05-06 | Hewlett Packard Enterprise Development Lp | Dynamically including an active tunnel as a member of a virtual network |
US20170245195A1 (en) * | 2016-02-22 | 2017-08-24 | Mediatek Inc. | Method for controlling network interfaces of electronic device and associated processing circuit |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2004135080A (en) * | 2002-10-10 | 2004-04-30 | Matsushita Electric Ind Co Ltd | Access network, packet transfer equipment, network administration unit, mobile terminal, and ip mobility control method |
US20050058060A1 (en) * | 2003-09-16 | 2005-03-17 | Nortel Networks Limited | K-byte extension and tunnel identifying scheme for tunnel-based shared mesh protection |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
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US6522880B1 (en) * | 2000-02-28 | 2003-02-18 | 3Com Corporation | Method and apparatus for handoff of a connection between network devices |
US8000241B2 (en) * | 2001-06-26 | 2011-08-16 | Qualcomm Incorporated | Methods and apparatus for controlling access link packet flow aggregation and resource allocation in a mobile communications system |
US7269135B2 (en) * | 2002-04-04 | 2007-09-11 | Extreme Networks, Inc. | Methods and systems for providing redundant connectivity across a network using a tunneling protocol |
GB2388490A (en) * | 2002-05-07 | 2003-11-12 | Marconi Comm Ltd | Monitoring the state of a communications network |
JP4511944B2 (en) * | 2002-12-26 | 2010-07-28 | パナソニック株式会社 | Mobile network control device and mobile network control method |
KR20050101693A (en) * | 2004-04-19 | 2005-10-25 | 삼성전자주식회사 | Method for recovery routing path with damage in a mobile network |
US7675848B2 (en) * | 2004-07-15 | 2010-03-09 | Cisco Technology, Inc. | Dynamic forwarding adjacency |
EP1798908A1 (en) * | 2004-10-01 | 2007-06-20 | Mitsubishi Denki Kabushiki Kaisha | Access service network system, access device, l2tp tunnel line concentrator and home agent, and access service providing method |
US20060168241A1 (en) * | 2004-11-24 | 2006-07-27 | Puthiyandyil Sanil K | Redundant L2TP end points |
US20060274672A1 (en) * | 2005-06-06 | 2006-12-07 | Narayanan Venkitaraman | System and method for reducing unnecessary traffic in a network |
US8116297B2 (en) * | 2005-12-23 | 2012-02-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Routing data packets from a moving network to a home network |
-
2007
- 2007-03-26 WO PCT/FR2007/051017 patent/WO2007110546A2/en active Application Filing
- 2007-03-26 US US12/279,993 patent/US20090067400A1/en not_active Abandoned
- 2007-03-26 EP EP07731829A patent/EP1999927A2/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004135080A (en) * | 2002-10-10 | 2004-04-30 | Matsushita Electric Ind Co Ltd | Access network, packet transfer equipment, network administration unit, mobile terminal, and ip mobility control method |
US20050058060A1 (en) * | 2003-09-16 | 2005-03-17 | Nortel Networks Limited | K-byte extension and tunnel identifying scheme for tunnel-based shared mesh protection |
Also Published As
Publication number | Publication date |
---|---|
US20090067400A1 (en) | 2009-03-12 |
WO2007110546A2 (en) | 2007-10-04 |
WO2007110546A3 (en) | 2007-11-22 |
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