WO2004070997A2 - Systeme de communication mobile comprenant une option d'enregistrement d'un emplacement de procuration - Google Patents

Systeme de communication mobile comprenant une option d'enregistrement d'un emplacement de procuration Download PDF

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Publication number
WO2004070997A2
WO2004070997A2 PCT/US2004/002955 US2004002955W WO2004070997A2 WO 2004070997 A2 WO2004070997 A2 WO 2004070997A2 US 2004002955 W US2004002955 W US 2004002955W WO 2004070997 A2 WO2004070997 A2 WO 2004070997A2
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WO
WIPO (PCT)
Prior art keywords
vehicle
mobile
mobile node
proxy location
node
Prior art date
Application number
PCT/US2004/002955
Other languages
English (en)
Other versions
WO2004070997A3 (fr
Inventor
Fumika Gotoh
Ryutaro Hamasaki
Masahiro Maeda
Original Assignee
Motorola Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc. filed Critical Motorola Inc.
Publication of WO2004070997A2 publication Critical patent/WO2004070997A2/fr
Publication of WO2004070997A3 publication Critical patent/WO2004070997A3/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/12—Mobility data transfer between location registers or mobility servers
    • 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/005—Moving wireless networks

Definitions

  • the present invention relates to a mobile communication system for performing location registration in order to establish communication between a mobile node and another communication node, and more particularly to a technology for reducing the amount of communication by performing proxy location registration for a plurality of mobile nodes in a vehicle.
  • a mobile node or a mobile terminal moves spatially.
  • a network for the mobile communication system constantly grasp the location of the mobile node. Consequently, it is necessary that each mobile node register its location in a network-connected server or the like.
  • FIG. 4 The mobile communication system shown in FIG. 4 comprises a home agent (HA) 1 and a plurality of mobility anchor points (MAPs) , which are linked to the home agent via a segment la.
  • HA home agent
  • MAPs mobility anchor points
  • FIG. 4 only one mobility anchor point 1 (MAP 1) 3a is show .
  • the segment la which is linked to the home agent 1, is linked to another segment lb via a router 9, a network 7, and another router 11.
  • a corresponding node (CN) 5 is linked to segment lb as a communication target .
  • the network 7 can be considered as an arbitrary topology that comprises, for instance, routers and links.
  • FIG. 4 assumes that a mobile node (MN) 19 is within an area that provides communication with a mobility anchor point 1 (MAPI) 3a. When the mobile node (MN) 19 moves to another area, the mobility anchor point (MAP) corresponding to that area communicates with the mobile node 19.
  • MN mobility anchor point 1
  • MAP mobility anchor point
  • MAPI 3a broadcasts the information about MAPI 3a, including a router advertisement (RA) , to the corresponding area.
  • the mobile node 19 receives the broadcast information to acquire the current location (LCoAl) of the mobile node and the address (RCoA) of MAPI.
  • the mobile node 19 transmits a binding update (BU) , that is, a location registration message, to MAPI.
  • BU binding update
  • MAPI returns a binding acknowledgement (BA) .
  • BA binding acknowledgement
  • MAPI ' s cache that is, a binding cache (location registration information memory) to store the current location information LCoAl in accordance with the home address of the mobile node 19.
  • the mobile node 19 transmits a location registration message (BU) to the home agent (HA) 1.
  • the home agent 1 performs a duplicate address detection (DAD) process to check for a duplicate address. If no abnormality is found, the home agent 1 returns a binding acknowledgement (BA) to the mobile node 19.
  • the binding cache of the home agent 1 then stores the address of MAPI in accordance with the home address of the mobile node 19.
  • the corresponding node transmits a packet containing the address information about the mobile node 19 to communicate with the mobile node 19, the packet is forwarded to the home agent 1 via router 11, network 7, and router 9.
  • the home agent 1 determines the location of the mobile node 19, and finds that the mobile node 19 is in a position to communicate with MAPI. The home agent 1 then transmits the packet data to the mobile node 19 via MAPI.
  • the mobile node 19 transmits the location registration message (BU) to the corresponding node
  • the desired packet data is then transmitted from the corresponding node 5 to the mobile node 19 via MAPI . In this manner, the corresponding node 5 can communicate with the mobile node 19.
  • MIPv6 and HMIPv ⁇ which are conventional standards of Internet Protocol (IP)
  • IP Internet Protocol
  • BU location registration message
  • the present invention proposes a method for furnishing a mobile communication system with a proxy location register and performing proxy location registration.
  • a mobile communication system comprises at least one server for registering a location for allowing a mobile node to communicate with another communication node.
  • the communication node and mobile node communicate with each other in accordance with the location information about the mobile node, which is registered in the server.
  • the mobile communication system comprises a vehicle proxy location register (VPLR) that performs proxy location registration for a mobile node positioned in a vehicle.
  • the vehicle proxy location register transmits a router advertisement message including information (PLR option) indicating that proxy location registration is achievable.
  • a mobile node in the vehicle receives a router advertisement message from the vehicle proxy location register, and transmits a proxy location registration request, which includes the information for requesting the vehicle proxy location register to perform proxy location registration instead of directly registering a location in the server, to the vehicle proxy location register for the purpose of establishing communication between the mobile node and another communication node via the vehicle proxy location register.
  • the mobile communication system may be configured so that the mobile node first communicates with the other communication node via the vehicle proxy location register and the server, and then communicates with the other communication node via the vehicle proxy location register and without via the server .
  • the vehicle proxy location register transmit to the server a list of location registration information about a plurality of mobile nodes in the vehicle.
  • the mobile communication system may alternatively be configured so that the mobile node transmits the proxy location registration request to the vehicle proxy location register when a signal received from the vehicle proxy location register, which contains a router advertisement message, becomes stronger than the other signals received from the server after the mobile node is positioned in the vehicle.
  • the server is a home agent, which may be linked to the vehicle proxy location register and linked to another communication node via another link.
  • the mobile communication system may alternatively be configured so that the home agent is linked to a plurality of mobility anchor points, and that the vehicle proxy location register is linked to the home agent via the mobility anchor points .
  • FIG. 1 is a schematic block diagram illustrating the configuration of a mobile communication system according to one embodiment of the present invention.
  • FIG. 2 is a schematic block diagram illustrating an operation performed by the communication system shown in FIG. 1 when a vehicle moves from its initial location.
  • FIG.3A schematically shows the format of a router advertisement from a vehicle proxy location register.
  • FIG. 3B schematically shows the format of a location registration message from a mobile node.
  • FIG. 4 is a schematic block diagram illustrating the configuration of an HMIPv ⁇ -based, prior art mobile communication system.
  • FIG. 1 schematically shows the configuration of a mobile communication system according to one embodiment of the present invention.
  • the mobile communication system shown in FIG. 1 includes a vehicle proxy location register
  • VPLR which is provided in the vehicle 15.
  • MAP2 3b which is a second mobility anchor point, is shown in addition to the aforementioned MAPI 3a.
  • MN mobile node
  • the vehicle proxy location register (VPLR) 17 is a router. For the communication from a higher level, it performs the same operations as the mobile node 19. More specifically, the VPLR 17 registers a location with MAPI in the same manner as described earlier with reference to the mobile node 19. Therefore, the binding cache of MAPI stores the VPLR's current location address (VCoAl) in accordance with the VPLR's home address.
  • VoAl current location address
  • the VPLR 17 performs location registration with the home agent 1 in the same manner.
  • the VPLR 17 then broadcasts a router advertisement (RA) .
  • the router advertisement contains, for instance, 1-bit PLR option information in addition to various items of information.
  • the VPLR 17 broadcasts the router advertisement (RA) , which contains the PLR option, to announce that the VPLR 17 is capable of performing proxy location registration.
  • MPA1 broadcasts MAPI information as well as the router advertisement.
  • the VPLR 17 periodically broadcasts the information about MAPI and VPLR as well as the router advertisement.
  • the router advertisement contains the PLR option.
  • the mobile node 19 merely possesses one interface. Therefore, the mobile node 19 cannot receive the router advertisement from the VPLR 17. Consequently, the mobile node 19 cannot change its corresponding MAP, which is MAPI, or its own address. In this state, therefore, packets are transmitted from the corresponding node 5 to the mobile node 19 via the home agent 1 (initially only) and MAPI.
  • the VPLR 17 has a plurality of interfaces for communicating with higher-level routers and is therefore capable of receiving a router advertisement (RA) from both MAPI and MAP2. Consequently, the VPLR 17 can retain two current locations (LCoA) , which are VCoAl and VCoA2. These current locations respectively correspond to the MAPI and MAP2 addresses .
  • RA router advertisement
  • the VPLR 17 selects MAP2 as its MAP, and a handover takes place .
  • the VPLR 17 transmits its own location registration message (BU) to MAPI, MAP2 , and home agent (HA) 1. Next, the VPLR 17 broadcasts a router advertisement with a PLR option as shown in FIG. 3A.
  • BU location registration message
  • MAP2 MAP2
  • HA home agent
  • the operation performed by the mobile node 19 positioned in the vehicle 15 will now be described.
  • the vehicle 15 moves from the MAPI coverage area to the MAP2 coverage area.
  • the router advertisement (RA) from MAPI which is received by the mobile node 19, has become increasingly weak. Therefore, the mobile node 19 operates another router advertisement and detects a router advertisement from the VPLR 17 as a stronger signal.
  • the mobile node 19 detects the PLR option contained in the router advertisement of the VPLR 17 and realizes that the VPLR 17 can perform proxy location registration.
  • the mobile node 19 acquires the current location (LCoA2 : static address) of the mobile node 19 and transmits a location registration message (BU) to the VPLR 17.
  • the binding cache of the VPLR 17 then stores the home address of the mobile node 19 and the current location (LCoA2) according to the home address .
  • the mobile node 19 understands that the PLR option is set by the router advertisement from the VPLR 17, that is, proxy location registration can be performed. Therefore, the mobile node 19 transmits a location registration message (BU) to the VPLR 17 in HMIPv ⁇ instead of directly transmitting it to the home agent 1 and corresponding node (CN) 5.
  • BU location registration message
  • FIGs. 3A and 3B schematically illustrate the formats of the router advertisement from the VPLR 17 and the location registration message (BU) from the mobile node 19.
  • the router advertisement which is shown in FIG. 3A, contains the PLR option as described earlier.
  • the PLR option is, for instance, 1-bit data.
  • the employed configuration is such that proxy location registration can be performed when the data is "1", and that proxy location registration cannot be performed when the data is "0" .
  • the location registration message from the mobile node 19, that is, the binding update (BU) which is shown in FIG. 3B, similarly contains PLR option data, which is, for instance, 1-bit data. If, for instance, the 1-bit data is "1", it may indicate that the mobile node 19 asks the VPLR 17 to perform proxy location registration. If, on the other hand, the 1-bit data is "0", it may indicate that the mobile node 19 does not ask the VPLR 17 to perform proxy location registration.
  • the VPLR 17 Upon receipt of the aforementioned location registration message (BU) from the mobile node 19, the VPLR 17 transmits the location registration message to the home agent 1. This ensures that the packet communication from the corresponding node (CN) to the mobile node 19 is conveyed from the corresponding node 5 to the home agent 1, VPLR 17, and mobile node 19.
  • BU location registration message
  • the VPLR 17 transmits the location registration message (BU) of the mobile node 19 to corresponding node (CN) 5. Subsequently, the packet communication between the mobile node 19 and corresponding node 5 is conveyed from the corresponding node 5 to the VPLR 17 and mobile node 19.
  • BU location registration message
  • CN corresponding node
  • the VPLR 17 can simultaneously transmit the location registration messages for a plurality of mobile nodes to the home agent 1 or MAP2. More specifically, the VPLR 17 can simultaneously transmit the information about a plurality of mobile nodes, such as the home address and current location, in the form, for instance, of a table or list.
  • the current location (LCoA) of the VPLR 17 continues to vary. For example, it changes from VCoA3 to VCoA3 , and so on to VCoAlO (not shown) .
  • the current location (LCoA) of the mobile node 19 continues to be LCoA2 as far as it is positioned within the same vehicle 15.
  • the mobile node 19 simply has to transmit a location registration message (BU) to the VPLR 17 at the first time only. Even if the vehicle 15 moves later, the mobile node 19 does not have to transmit a location registration message again.
  • the VPLR 17 transmits such a location registration message by proxy.
  • the mobile node 19 does not have to transmit such a location registration message to the home agent 1 and corresponding node 5 as far as the mobile node 19 is in the vehicle 15.
  • the VPLR 17 can simultaneously transmit the location registration messages for many mobile nodes, for example, mobile nodes for 100 persons. As a result, when the vehicle 15 moves over a relatively long distance, the amount of packet traffic can be properly reduced.
  • the location registration message communications traffic between a mobile node and home agent and between the mobile node and corresponding node can be substantially reduced when a vehicle carrying the mobile node moves over a long distance.
  • the packets for the mobile node positioned in the vehicle are relayed by the VPLR. Therefore, the VPLR can be used to transmit various items of information in addition to the information from the corresponding node. For example, news, advertisements, local information, and other information can be effectively conveyed to a plurality of mobile nodes within the vehicle .
  • the VPLR can transmit appropriate location information about each mobile node to the home agent or the like. In other words, the VPLR can refrain from transmitting the current locations of individual nodes and convey information indicating that a mobile node is positioned in a train or other vehicle
  • the mobile communication system can perform the same operation as a conventional HMIPv ⁇ -based operation.
  • the VPLR has two interfaces, which are convenient for mobile node packet transfer and soft handover. Furthermore, no changes are required for MAPs .

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  • Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un système de communication mobile comprenant un registre de l'emplacement de procuration d'un véhicule (VPLR) aux fins de réduction de la quantité de trafic de signalisation utilisée par une pluralité de noeuds mobiles positionnés dans un véhicule. Le VPLR émet un message de publicité pour un routeur renfermant des informations (option PLR) indiquant que l'enregistrement de l'emplacement de procuration peut être effectué. Un noeud mobile positionné dans le véhicule reçoit le message de publicité pour le routeur et émet une demande d'enregistrement de l'emplacement de procuration, comprenant les informations permettant de demander au VPLR d'effectuer un enregistrement de l'emplacement de procuration à la place d'enregistrer directement un emplacement dans le serveur, au registre de l'emplacement de procuration du véhicule afin d'établir une communication entre le noeud mobile et un autre noeud de communication. Un tel système permet au noeud mobile positionné dans un véhicule de communiquer avec un autre noeud mobile par l'intermédiaire du VPLR.
PCT/US2004/002955 2003-02-04 2004-02-03 Systeme de communication mobile comprenant une option d'enregistrement d'un emplacement de procuration WO2004070997A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003-026899 2003-02-04
JP2003026899A JP4319842B2 (ja) 2003-02-04 2003-02-04 代理位置登録オプションを備えた移動通信システム

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WO2004070997A2 true WO2004070997A2 (fr) 2004-08-19
WO2004070997A3 WO2004070997A3 (fr) 2007-08-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017007386A1 (fr) * 2015-07-08 2017-01-12 Telefonaktiebolaget Lm Ericsson (Publ) Informations de localisation dans des réseaux de communication

Families Citing this family (4)

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JP4485295B2 (ja) * 2004-09-07 2010-06-16 株式会社エヌ・ティ・ティ・ドコモ 移動制御システム、移動制御方法及び移動制御装置並びに移動制御プログラム
JP4664144B2 (ja) * 2005-07-25 2011-04-06 三菱電機株式会社 移動体通信システム
US8797951B2 (en) 2008-03-10 2014-08-05 Nec Corporation Communication system, transfer node, mobile node, server apparatus, communication control method, and program
JP5186265B2 (ja) * 2008-03-28 2013-04-17 株式会社エヌ・ティ・ティ・ドコモ モバイル通信システム、モバイルルータ、ホームエージェント、及びモバイル通信方法

Citations (1)

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Publication number Priority date Publication date Assignee Title
US6580916B1 (en) * 2000-09-15 2003-06-17 Motorola, Inc. Service framework for evaluating remote services based upon transport characteristics

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6580916B1 (en) * 2000-09-15 2003-06-17 Motorola, Inc. Service framework for evaluating remote services based upon transport characteristics

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017007386A1 (fr) * 2015-07-08 2017-01-12 Telefonaktiebolaget Lm Ericsson (Publ) Informations de localisation dans des réseaux de communication
US11051271B2 (en) 2015-07-08 2021-06-29 Telefonaktiebolaget Lm Ericsson (Publ) Location information in communications network

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WO2004070997A3 (fr) 2007-08-02
JP2004241895A (ja) 2004-08-26
JP4319842B2 (ja) 2009-08-26

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