WO2007066977A1 - Procede et systeme assurant le transfert sans interruption d'un noeud mobile au moyen du protocole de transmission de commande de flux des mobiles - Google Patents

Procede et systeme assurant le transfert sans interruption d'un noeud mobile au moyen du protocole de transmission de commande de flux des mobiles Download PDF

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Publication number
WO2007066977A1
WO2007066977A1 PCT/KR2006/005239 KR2006005239W WO2007066977A1 WO 2007066977 A1 WO2007066977 A1 WO 2007066977A1 KR 2006005239 W KR2006005239 W KR 2006005239W WO 2007066977 A1 WO2007066977 A1 WO 2007066977A1
Authority
WO
WIPO (PCT)
Prior art keywords
network
data link
mobile node
new
information
Prior art date
Application number
PCT/KR2006/005239
Other languages
English (en)
Inventor
Yong-Geun Hong
Jung-Soo Park
Hyoung-Jun Kim
Original Assignee
Electronics And Telecommunications Research Institute
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
Priority claimed from KR1020060078978A external-priority patent/KR100723885B1/ko
Application filed by Electronics And Telecommunications Research Institute filed Critical Electronics And Telecommunications Research Institute
Priority to US12/085,570 priority Critical patent/US20090252114A1/en
Publication of WO2007066977A1 publication Critical patent/WO2007066977A1/fr

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Classifications

    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5084—Providing for device mobility
    • 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
    • H04L61/5092—Address allocation by self-assignment, e.g. picking addresses at random and testing if they are already in use
    • 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
    • H04L65/1083—In-session procedures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0019—Control or signalling for completing the hand-off for data sessions of end-to-end connection adapted for mobile IP [MIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections
    • 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
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/06—Transport layer protocols, e.g. TCP [Transport Control Protocol] over wireless

Definitions

  • the present invention relates to a method and system for supporting mobility of a mobile node, and more particularly, to a method and system for supporting a seamless handover of a mobile node using a mobile Stream Control Transmission Protocol (mSCTP).
  • mSCTP mobile Stream Control Transmission Protocol
  • IP All-Internet Protocol
  • WiBro Wireless Broadband
  • IEEE Institute of Electrical and Electronics Engineers
  • 3G Third generation
  • IP mobility has increased more and more.
  • mSCTP mobile Stream Control Transmission Protocol
  • the mSCTP is based on the SCTP suggested by the signaling transport
  • AddIP and DeletelP are messages defined in IETF Internet standards, and more particularly, in an IETF document entitled 'Stream
  • AddIP adds a new IP address to the SCTP association and DeletelP deletes an IP address registered as an end IP address in a current association.
  • DeletelP deletes an IP address registered as an end IP address in a current association.
  • the mSCTP facilitates a handover by binding a changed IP address to a session so that the session is not interrupted even if an IP address is changed due to the movement of a mobile node, that is, the mSCTP seamlessly maintains the connection between the mobile node and the Internet.
  • the present invention provides a method and system for supporting a seamless handover of a mobile node using a mobile Stream Control Transmission Protocol (mSCTP) by reducing a handover delay occurring when the mobile node moves into a new sub-network.
  • mSCTP mobile Stream Control Transmission Protocol
  • the present invention provides a method and system for supporting a seamless handover of a mobile node using a mobile Stream Control Transmission Protocol (mSCTP) by reducing a handover delay occurring when the mobile node moves into a new sub-network.
  • mSCTP mobile Stream Control Transmission Protocol
  • a method of supporting a seamless handover of a mobile node using a mobile Stream Control Transmission Protocol including: detecting a change of data link layer information, which occurs when the mobile node moves into a new sub-network, and transmitting changed data link layer information to a network layer; acquiring a new Internet protocol (IP) address for the new sub-network in the network layer based on the changed data link layer information; and transmitting the new IP address to a transport layer and performing dynamic address setting in the transport layer using the mSCTP.
  • IP Internet protocol
  • IP Internet protocol
  • a handover delay occurring when a mobile node moves into a new sub-network is reduced, and therefore, mobility of the mobile node supporting a seamless handover can be supported.
  • FlG. 1 illustrates the typical operation of a mobile Stream Control Transmission
  • mSCTP Mobility Management Protocol
  • FlG. 2 illustrates the change of Internet Protocol (IP) addresses when the mobile node illustrated in FlG. 1 moves into a new sub-network;
  • IP Internet Protocol
  • FlG. 3 is a method of supporting a seamless handover of a mobile node using the mSCTP according to an embodiment of the present invention
  • FlG. 4 illustrates a procedure of transmitting information between layers and performing a function in a mobile node, according to an embodiment of the present invention.
  • FlG. 5 illustrates a system for supporting a seamless handover of a mobile node using the mSCTP according to an embodiment of the present invention.
  • the present invention provides a method and system for supporting a seamless handover of a mobile node using a mobile Stream Control Transmission Protocol (mSCTP) by reducing a handover delay occurring when the mobile node moves into a new sub-network.
  • mSCTP mobile Stream Control Transmission Protocol
  • a method of supporting a seamless handover of a mobile node using a mobile Stream Control Transmission Protocol including: detecting a change of data link layer information, which occurs when the mobile node moves into a new sub-network, and transmitting changed data link layer information to a network layer; acquiring a new Internet protocol (IP) address for the new sub-network in the network layer based on the changed data link layer information; and transmitting the new IP address to a transport layer and performing dynamic address setting in the transport layer using the mSCTP.
  • IP Internet protocol
  • IP Internet protocol
  • FlG. 1 illustrates the typical operation of a mobile Stream Control Transmission
  • FlG. 2 illustrates the change of Internet Protocol (IP) addresses when the mobile node illustrated in FlG. 1 moves into a new sub-network.
  • IP Internet Protocol
  • a counter node 130 adds the new IP address to a current SCTP association using an AddIP 140.
  • the mobile node 100a determines whether an old IP address used in the previous sub-network 110 is necessary and deletes the old IP address used in the previous sub-network 110, in which data transmission is impossible, using a DeleteIP 150 when it is determined that the old IP address is not necessary.
  • the change of an IP address according to the positions of the mobile nodes 100a, 100b, and 100c is respectively shown in tables 210, 220, and 230 illustrated in FIG. 2.
  • AddIP cannot be performed until a new IP address is acquired in a network layer of a mobile node. It takes a lot of time to acquire the new IP address in the network layer and transmit the new IP address to a transport layer, which makes it difficult to support a seamless handover.
  • FlG. 3 is a method of supporting a seamless handover of a mobile node using the mSCTP according to an embodiment of the present invention.
  • the changed data link layer information is transmitted to a network layer.
  • the change in a data link layer is the first change that occurs.
  • the mobile node 300 detects the change in the data link layer in operation S302 and acquires changed data link layer information in operation S304.
  • the change of the data link layer information may be information about a connection to a new data link layer, information about a disconnection from an existing data link layer, information about link-up, or information about link-down.
  • the mobile node 300 transmits the changed data link layer information to an upper layer in order to quickly acquire an IP address in the network layer.
  • the upper layer receiving the changed data link layer information in the mobile node 300 performs a procedure for acquiring an IP address in a new sub-network using the changed data link layer information.
  • the procedure for acquiring an IP address is a process of determining whether a change has occurred in the network layer.
  • the change in the data link information may be the movement of the mobile node 300 to a new sub-network or not.
  • a data link entity e.g., an access point in a wireless local area network (WLAN)
  • WLAN wireless local area network
  • the network layer transmits a router solicitation message upon receiving the changed data link layer information.
  • the network layer passively waits for a router advertisement (RA) message in order to determine whether the mobile node 300 moves into a new sub-network.
  • RA router advertisement
  • the network layer transmits the router solicitation message immediately in order to make immediate determination on the movement into a new subnetwork.
  • the network layer determines whether the mobile node 300 has moved into a new sub-network based on the received reply message.
  • Whether the mobile node 300 has moved into a new sub-network is determined based on a prefix included in the RA message received from a router. If the prefix included in the RA message is the same as a previous prefix, it is determined that the mobile node 300 has not moved into a new sub-network; otherwise, it is determined that the mobile node 300 has moved into a new sub-network.
  • operation S310 the IP address acquired for the new sub-network through the above-described operation is transmitted to a transport layer.
  • the mobile node 300 performs a dynamic address configuration process in the transport layer using an mSCTP.
  • the dynamic address configuration process can be performed using AddIP defined in the mSCTP.
  • the change of an IP address in the network layer directly provokes the mSCTP in the transport layer to perform AddIP. Accordingly, upon receiving a report indicating that a new IP address is acquired from the network layer, the transport layer immediately performs AddIP through the mSCTP. As a result, a handover defined in the mSCTP can be performed with improved quality.
  • the mobile node 300 After receiving from a counter node 320 an acknowledgement (ACK) indicating that the AddIP has been performed in operation S312, the mobile node 300 sets the new IP address as a primary address in operation S314. Thereafter, if a previous IP address is not necessary, the mobile node 300 deletes the previous IP address by performing DeleteIP according to the mSCTP in operation S316.
  • ACK acknowledgement
  • FlG. 4 illustrates a procedure of transmitting information between layers
  • a network layer in order to reduce a handover delay time in the mobile node, a network layer quickly acquires a new IP address using data link layer information and transmits the new IP address to the mSCTP in a transport layer so that AddIP is quickly performed.
  • FlG. 5 illustrates a system for supporting a seamless handover of a mobile node
  • the system for supporting a seamless handover of the mobile node 500 includes a change detector 502, a sub-network determination unit 504, an IP address acquisition unit 506, and a dynamic address setting unit 508.
  • the change detector 502 detects the change in data link layer information, which occurs when the mobile node 500 moves into a new sub-network.
  • the data link layer information detected by the change detector 502 may be information about a connection to a new data link layer, information about a disconnection from an existing data link layer, information about link-up, or information about link-down.
  • the sub-network determination unit 504 determines whether the mobile node 500 has moved into a new sub-network based on the data link layer information received from the change detector 502.
  • the sub-network determination unit 504 determines that the mobile node 500 has not moved to a new sub-network when, after the movement of the mobile node 500, a new data link entity is connected with the same network as a previous data link entity before the movement occurred. In a case where the mobile node 500 moves into a new sub-network in the IPv6 environment, the sub-network determination unit 504 immediately transmits a router solicitation message as soon as receiving the changed data link layer information, without waiting for an RA message. When a reply message in response to the router solicitation message is received from a router, whether the mobile node 500 has moved into a new sub-network can be determined based on the reply message.
  • the IP address acquisition unit 506 acquires a new IP address in the new sub-network using the changed data link layer information.
  • the dynamic address setting unit 508 changes an address of the mobile node 500 into the new IP address using the mSCTP while maintaining a session.
  • the dynamic address setting unit 508 dynamically changes an IP address mapped in an SCTP association in order to support mobility.
  • a counter node 510 can transmit data to the new IP address of the mobile node 500.
  • the mSCTP defines AddIP and DeleteIP which are used to perform the above- described operations.
  • the system for supporting a seamless handover allows AddIP to be quickly performed using the data link layer information, thereby reducing a handover delay time. As a result, the mobility of the mobile node 500 can be improved.
  • the invention can also be embodied as computer readable codes 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 a computer system. Examples of the computer readable recording medium include read-only memory (ROM), random-access memory (RAM), CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and carrier waves (such as data transmission through the Internet).
  • ROM read-only memory
  • RAM random-access memory
  • CD-ROMs compact discs
  • magnetic tapes magnetic tapes
  • floppy disks optical data storage devices
  • carrier waves such as data transmission through the Internet
  • the present invention is applicable to a method and system for supporting mobility of a mobile node.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un système qui assurent le transfert sans interruption d'un noeud mobile au moyen d'un protocole de transmission de commande de flux des mobiles (mSCTP) pour soutenir la mobilité du noeud mobile. Dans le procédé et le système, une modification des informations de la couche liaison de données qui se produit lorsque le noeud mobile se déplace dans un nouveau sous-réseau, est détectée et les informations de couche liaison de données modifiées sont transmises à une couche réseau. Une nouvelle adresse de protocole Internet (IP) pour le nouveau sous-réseau, est acquise dans la couche réseau au moyen des informations de couche liaison de données modifiées. La nouvelle adresse IP est envoyée à une couche transport et l'établissement d'adresse dynamique est effectué dans la couche transport au moyen de mSCTP.
PCT/KR2006/005239 2005-12-08 2006-12-06 Procede et systeme assurant le transfert sans interruption d'un noeud mobile au moyen du protocole de transmission de commande de flux des mobiles WO2007066977A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/085,570 US20090252114A1 (en) 2005-12-08 2006-12-06 Method and System for Supporting Seamless Handover of Mobile Node Using Mobile Stream Control Transmission Protocol

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2005-0119302 2005-12-08
KR20050119302 2005-12-08
KR10-2006-0078978 2006-08-21
KR1020060078978A KR100723885B1 (ko) 2005-12-08 2006-08-21 ｍＳＣＴＰ를 이용한 이동 단말의 무결절 핸드오버 지원방법 및 장치

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Publication Number Publication Date
WO2007066977A1 true WO2007066977A1 (fr) 2007-06-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010017768A1 (fr) * 2008-08-13 2010-02-18 华为技术有限公司 Procédé, élément de réseau et système d’établissement d’une connexion de communication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040028009A1 (en) * 2002-08-06 2004-02-12 Motorola, Inc. Method and apparatus for effecting a seamless handoff between IP connections
US20050073981A1 (en) * 2003-10-02 2005-04-07 International Business Machines Corporation mSCTP based handover of a mobile device between non-intersecting networks
KR20060032544A (ko) * 2004-10-12 2006-04-17 한국전자통신연구원 광대역 통합망에서의 단절없는 핸드오버 제공 방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040028009A1 (en) * 2002-08-06 2004-02-12 Motorola, Inc. Method and apparatus for effecting a seamless handoff between IP connections
US20050073981A1 (en) * 2003-10-02 2005-04-07 International Business Machines Corporation mSCTP based handover of a mobile device between non-intersecting networks
KR20060032544A (ko) * 2004-10-12 2006-04-17 한국전자통신연구원 광대역 통합망에서의 단절없는 핸드오버 제공 방법

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010017768A1 (fr) * 2008-08-13 2010-02-18 华为技术有限公司 Procédé, élément de réseau et système d’établissement d’une connexion de communication

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