WO2007043744A1 - Procede d'auto-configuration de rcoa reposant sur un ipv6 mobile hierarchique - Google Patents

Procede d'auto-configuration de rcoa reposant sur un ipv6 mobile hierarchique Download PDF

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Publication number
WO2007043744A1
WO2007043744A1 PCT/KR2006/002486 KR2006002486W WO2007043744A1 WO 2007043744 A1 WO2007043744 A1 WO 2007043744A1 KR 2006002486 W KR2006002486 W KR 2006002486W WO 2007043744 A1 WO2007043744 A1 WO 2007043744A1
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WO
WIPO (PCT)
Prior art keywords
rcoa
map
mobile
address
mobile node
Prior art date
Application number
PCT/KR2006/002486
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English (en)
Inventor
Min-Ji Nam
Eun-Kyoung Paik
Sung-Il Kim
Sang-Eon Kim
Se-Jun Park
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Kt Corporation
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
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Publication of WO2007043744A1 publication Critical patent/WO2007043744A1/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
    • H04W8/085—Mobility data transfer involving hierarchical organized mobility servers, e.g. hierarchical mobile IP [HMIP]
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • 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

  • the present invention relates to a regional care-of- address auto configuration method based on a hierarchical mobile IPv6 and a computer readable recording medium for recording a program that implements the same; and more particularly, to a regional care-of-address auto configuration method for reducing a delay of generating an address and saving resources by quickly performing duplicate address detection (DAD), which is an essential procedure for a regional care-of-address auto allocation, using stored regional care-of-address (RCoA) and on-link care-of-address (LCoA) of a terminal, which are stored at a mobile anchor point (MAP) for managing the mobility of the terminal in a hierarchical mobile internet protocol version 6 (HMIPv ⁇ ) network, and a computer readable recording medium for recording a program that implements the same.
  • DAD duplicate address detection
  • RoA stored regional care-of-address
  • LoA on-link care-of-address
  • MAP mobile anchor point
  • HMIPv ⁇ hierarch
  • the present invention relates to a regional care-of- address auto configuration method based on a hierarchical mobile IPv6 and a computer readable recording medium for recording a program that implements the same; and more particularly, to a regional care-of-address auto configuration method for reducing a delay of generating an address and saving resources by quickly performing duplicate address detection (DAD), which is an essential procedure for a regional care-of-address auto allocation, using stored regional care-of-address (RCoA) and on-link care-of-address (LCoA) of a terminal, which are stored at a mobile anchor point (MAP) for managing the mobility of the terminal in a hierarchical mobile internet protocol version 6 (HMIPv ⁇ ) network, and a computer readable recording medium for recording a program that implements the same.
  • DAD duplicate address detection
  • RoA stored regional care-of-address
  • LoA on-link care-of-address
  • MAP mobile anchor point
  • HMIPv ⁇ hierarch
  • a home address is an address used to uniquely identify a mobile node MN in a mobile internet protocol (IP).
  • IP mobile internet protocol
  • a care of address is an address having position data of a mobile node in a mobile internet protocol (IP ) .
  • IP mobile internet protocol
  • a regional CoA is an IPv6 address of a subnet of a mobile anchor point (MAP), which is automatically configured using corresponding network information in a visited network.
  • An on-link CoA is an address configured using a prefix received from an access router (AR) at a mobile node.
  • Duplicate address detection is a procedure that determines whether a generated RCoA is duplicated with the address of a neighbor node or not. Particularly, the DAD is a procedure in which a mobile node (MN) broadcasts a packet to all other nodes in the same subnet to ask whether a generated address is duplicated or not.
  • MN mobile node
  • a basic concept of a HMIPv ⁇ will be described with reference to Fig. 1.
  • MN mobile node
  • HA home agent
  • a home agent 70 is a device for managing a home address of a mobile node 10.
  • a mobile anchor point (MAP) 50 is an agent to manage the local location migration of mobile nodes.
  • the MAP 50 is located at a network where a MN 10 visited and used as a local HA of the MN 10.
  • a region provided with a service from a MAP 50 is formed of regions provided with a service from a plurality of access routers (AR) 30 and 40.
  • the access routers 30 and 40 are a default router of a MN 10, which gather traffic of a MN 10 and transform them to a MAP 50.
  • a MN 10 arrives at a region of a new MAP 50, two CoAs are generated.
  • One is a regional CoA (RCoA) having information about a mobile anchor point (MAP) domain, and the other is an On-Link CoA (LCoA) having information about subnets managed by access routers (AR) 30 and 40.
  • RoA regional CoA
  • LCoA On-Link CoA
  • a pair of (RCoA, LCoA) is registered at a corresponding mobile access point (MAP) 50
  • a pair of (HoA, RCoA) is registered at a corresponding home agent (HA) 70.
  • a MN 10 can completely register its position by registering a RCoA and a newly obtained LCoA to a MAP 50. That is, the network load can be reduced because a binding update (BU) from a MN 10 to a HA 70 through Internet is not required if the MN 10 moves within a MAP domain.
  • BU binding update
  • a MN 10 When a MN 10 moves to a new MAP domain so a MAP 50 changes, a MN 10 generates two CoAs, an RCoA used on the domain of a MAP, and an LCoA applied to the domain of an access router.
  • the MN 10 generating the CoA based on prefix information from a MAP 50, and transmits local binding update (BU) information to the MAP 50.
  • BU local binding update
  • the LCoA is used as a source address.
  • the MAP 50 binds the RCoA and the LCoA of the MN 10.
  • the MN 10 must broadcast a packet to all mobile nodes belong to the MAP 50 to ask whether an address is duplicated or not after generating the RCoA based on prefix information from the MAP 50. That is, the MN 10 decides whether a generated address is duplicated or not by broadcasting a packet to all mobile nodes of a same MAP domain to ask whether the generated address is duplicated or not, and receiving the result thereof from each node.
  • Such a procedure wastes numerous wireless resources and time, for example, time delay for generating an RCoA.
  • a MN 10 in a HMIPv ⁇ network formed of a MAP 50 servicing a plurality of access routers (AR) 30 and 40, a MN 10 must wait responses from neighbor mobile nodes after broadcasting a packet to all neighbor nodes belong to a corresponding MAP 50 to ask whether a generated address is duplicated or not.
  • the MN 10 in case of using HMIPv ⁇ , the MN 10 generates an RCoA by itself using an address auto configuration method, and performs DAD for confirming whether the generated address is duplicated with the neighbor nodes' address. While performing DAD, the mobile node 10 wastes lots of wireless-resources, and has a time delay for waiting acknowledge messages for the packet for asking address duplication from all neighbor nodes. Disclosure Technical Problem
  • an object of the present invention to a regional care-of-address auto configuration method for reducing a delay of generating an address and saving resources by quickly performing duplicate address detection (DAD), which is an essential procedure for a regional care-of-address auto allocation, using stored regional care-of-address (RCoA) and on-link care-of- address (LCoA) of a terminal, which are stored at a mobile anchor point (MAP) for managing the mobility of the terminal in a hierarchical mobile internet protocol version 6 (HMIPv ⁇ ) network, and a computer readable recording medium for recording a program that implements the same.
  • DAD duplicate address detection
  • RoA regional care-of-address
  • LCDoA on-link care-of- address
  • MAP mobile anchor point
  • HMIPv ⁇ hierarchical mobile internet protocol version 6
  • a regional care-of-address auto configuration method based on a hierarchical mobile Internet protocol network including the steps of: mapping and managing a regional care-of-address (RCoA) and an on- link care-of-address (LCoA) at a binding cache for managing a mobility of a mobile node in a mobile anchor point (MAP) domain; at a mobile node (MN), generating a RCoA using prefix information of a mobile anchor point (MAP); at the MAP, determining whether the generated RCoA is duplicated or not based on the binding cache according to a request of determining the RCoA duplication; and at the MAP, allocating the RCoA to the mobile node if the RCoA is uniquely used in a corresponding MAP domain
  • the regional care-of-address auto configuration method may further include the step of, at the mobile node, requesting the MAP to determine whether the generated RCoA is duplicated or not after generates the RCoA instead of broadcasting a packet to ask duplication of the generated RCoA to all neighbor mobile nodes belonging to the MAP.
  • a computer readable recording medium for recording a program that implements a regional care-of-address auto configuration method based on a hierarchical mobile Internet protocol network, including the steps of: mapping and managing a regional care-of-address (RCoA) and an on-link care-of-address (LCoA) at a binding cache for managing a mobility of a mobile node in a mobile anchor point domain; at a mobile node, generating a RCoA using prefix information of a mobile anchor point (MAP); at the MAP, determining whether the generated RCoA is duplicated or not based on the binding cache according to a request of determining the RCoA duplication; and at the MAP, allocating the RCoA to the mobile node if the RCoA is uniquely used in a corresponding subnet.
  • RoA regional care-of-address
  • LoA on-link care-of-address
  • resources can be saved, and a time delay for generating addresses can be reduced by quickly performing duplicate address detection (DAD), which is an essential procedure for a regional care-of-address auto allocation, using stored regional care-of-address (RCoA) and on-link care-of-address (LCoA) of a terminal, which are stored at a mobile anchor point (MAP), in a hierarchical mobile internet protocol version 6 (HMIPv ⁇ ) network.
  • DAD duplicate address detection
  • RoA regional care-of-address
  • LoA on-link care-of-address
  • MAP mobile anchor point
  • HMIPv ⁇ hierarchical mobile internet protocol version 6
  • a seamless service can be provided by facilitating mobility resources through reducing a time of generating an address when a mobile terminal actively moves, that is, a moving speed is fast.
  • FIG. 1 is a diagram illustrating a hierarchical mobile Internet protocol network in accordance with the related art
  • Fig. 2 is a diagram illustrating a regional care-of- address auto configuration method of a terminal node in a hierarchical mobile Internet protocol network in accordance with an embodiment of the present invention.
  • Fig. 3 is a flowchart illustrating a regional care- of-address auto configuration method of a terminal node in a hierarchical mobile Internet protocol network in accordance with an embodiment of the present invention.
  • Fig. 2 is a diagram illustrating a regional care-of- address auto configuration method of a terminal node in a hierarchical mobile Internet protocol network in accordance with an embodiment of the present invention. That is, Fig. 2 shows a procedure for automatically setting a RCoA of a terminal node in a HMIPv ⁇ .
  • a mobile node MN 10 arrives at a region of a new mobile anchor point MAP 50, two care-of-addresses (CoAs) are generated.
  • One is a regional CoA (RCoA) having information about a mobile anchor point (MAP) domain
  • LCoA On-Link CoA having information about subnets managed by access routers (AR) 30 and 40.
  • a pair of (RCoA, LCoA) is registered at a binding cache 60 of a corresponding mobile access point (MAP) 50, and a pair of (HoA, RCoA) is registered at a corresponding home agent (HA) 70.
  • a mobile node 10 moves into other subnets in a corresponding MAP domain, for example, when a mobile node (MN) 10 moves from a region of a first access router (ARl) 30 to a region of a second access router (AR2) 40, the RCoA does not change although the LCoA changes. Therefore, the MN 10 can completely register its position by registering a RCoA and a newly obtained LCoA to a MAP 50. That is, the network load can be reduced because a binding update (BU) from a MN 10 to a HA 70 through Internet is not required if the MN 10 moves within a MAP domain.
  • BU binding update
  • the MAP 50 maps the RCoA and the LCoA to a binding cache 60 in order to manage the mobility of all IPv6 communication nodes such as mobile nodes 10 and 20 on a subnet.
  • the MNs 10 and 20 inquire to the mobile anchor point (MAP) 50 whether a generated RCoA is duplicated in a corresponding subnet, and the mobile anchor point (MAP) 50 inspects whether the generated RCoA is duplicated or not based on the binding cache and informs the result thereof to the MNs 10 and 20 instead of performing a DAD procedure that broadcasts a packet to all neighbor nodes to ask whether the generated RCoA is duplicated or not, and decides whether the generated RCoA is used or not by receiving the responses thereof from each node.
  • a MN 10 transmits a neighbor solicitation (NS) message to all neighbor mobile nodes belonging to the MAP 50.
  • NS neighbor solicitation
  • the neighbor mobile node If a neighbor mobile node uses a same address, the neighbor mobile node transmits a neighbor advertisement (NA) message.
  • NA neighbor advertisement
  • the NM 10 uses a corresponding address RCoA. However, if the MN 10 transmitting the NS message determines that the generated RCoA is duplicated with other node, the MN 10 dose not allocate the generated RCoA.
  • the MNs 10 and 20 generate the RCoA based on prefix information from the MAP 50, and decides whether the generated RCoA is used or not by broadcasting a packet to all neighbor mobile nodes belonging to the MAP 50 to ask whether the generated RCoA is duplicated or not and receiving responses thereof from the neighbor mobile nodes. Therefore, numerous wireless resources are wasted, and a time delay is generated when the RCoA is generated.
  • the duplicate address detection is quickly performed, which is an essential procedure for an RCoA auto allocation, using mobile nodes' RCoA and LCoA stored in a binding cache 60 of a MAP 50 in the present embodiment.
  • the MAP 50 determines whether a RCoA generated from mobile nodes 10 and 20 is duplicated or not using RCoA and LCoA' s binding cache information and informs the determination result to the MNs 10 and 20 instead of transmitting a message to all mobile nodes on a corresponding subnet for checking the address duplication.
  • IPv6 communication nodes 10 and 20 belonging to a subnet of a MAP 50 receive a guarantee of transparency for mobility in a MAP domain from a corresponding node 80 and a home agent 70.
  • the home agent 70 can transmit a packet to all IPv6 mobile nodes 10 and 20 belonging to the subnet of the MAP 50.
  • the IPv6 mobile nodes 10 and 20 belonging to the subnet of the MAP 50 generate two CoAs.
  • a mobile node 10 entering a first access router (ARl) 30 generates two CoAs.
  • One is an RCoA used on a domain of the MAP 50, and the other is an LCoA applied to the domain of an access router.
  • the RCoA is generated in a stateless mode.
  • the mobile nodes 10 and 20 generating the RCoA based on prefix information from the MAP 50, and transmit a local binding update (Local BU) message to the MAP 50.
  • the local binding update message is a message transmitted from the mobile nodes 10 and 20 to the mobile anchor point 50 for binding an RCoA and a LCoA.
  • the LCoA is used a source address of BU.
  • the MAP 50 determines the RCoA is a unique address in a subnet or not in order to bind the RCoA and the LCoA of the mobile nodes 10 and 20.
  • the MAP 50 uses stored binding cache information about RCoA and LCoA, which is stored in the binding cache 60 to determine the RCoA duplication.
  • the MAP 50 performs the DAD procedure for the mobile nodes 10 and 20, and informs the results of the DAD procedure to the mobile nodes 10 and 20 through a binding acknowledge packet.
  • the binding acknowledge packet includes information whether a binding successes or fails.
  • Fig. 3 is a flowchart illustrating a regional care- of-address auto configuration method of a terminal node in a hierarchical mobile Internet protocol network in accordance with an embodiment of the present invention.
  • the MAP 50 maps a RCoA and a
  • LCoA registers the mapped RCoA and LCoA to the binding cache 60, and manages the binding cache 60 for managing the mobility of all IPv6 communication terminals such as mobile nodes 10 and 20 on a subnet.
  • the mobile node MN 10 When the mobile node MN 10 generates an RCoA based on the prefix information from the MAP 50 at steps S301 and S302, the mobile node MN 10 transmits a local binding update (Local BU) message to the MAP 50 at step S303 for determining whether the generated RCoA is duplicated in a corresponding subnet or not.
  • a local binding update Local BU
  • the above described method according to the present invention can be embodied as a program and stored on a computer readable recording medium.
  • the computer readable recording medium is any data storage device that can store data which can be thereafter read by the computer system.
  • the computer readable recording medium includes a read-only memory (ROM), a random-access memory (RAM) , a CD-ROM, a floppy disk, a hard disk and an optical magnetic disk.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

cette invention concerne un procédé d'auto-configuration RCoA (Regional Care-of-a dress/adresse IP temporaire) reposant sur un Ipv6 mobile hiérarchique. Ce procédé consiste : à reporter et à gérer une adresse RCoA et d'une adresse LCoA (on-link care-of-adress) au niveau d'un cache de liaison pour la gestion de la mobilité d'un noeud mobile dans un domaine de point de rattachement mobile ; au niveau du noeud mobile, à créer une adresse RCoA au moyen d'une information préfixe du point de rattachement mobile (Mobile Anchor Point/MAP) ; au point MAP, à déterminer si l'adresse RCoA créée est dupliquée ou non compte tenu du cache de liaison selon une demande concernant la duplication de RCoA ; et au point MAP, à attribuer l'adresse RCoA au noeud mobile si l'adresse RCoA est utilisée uniquement dans un sous-réseau correspondant.
PCT/KR2006/002486 2005-10-10 2006-06-27 Procede d'auto-configuration de rcoa reposant sur un ipv6 mobile hierarchique WO2007043744A1 (fr)

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KR10-2005-0094970 2005-10-10
KR1020050094970A KR100882429B1 (ko) 2005-10-10 2005-10-10 계층적 이동 인터넷 프로토콜 망에서의 단말의지역임시주소 자동 설정 방법

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