WO2008029732A1 - Communication system using network base ip mobility protocol, control device, router, and its communication method - Google Patents
Communication system using network base ip mobility protocol, control device, router, and its communication method Download PDFInfo
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- WO2008029732A1 WO2008029732A1 PCT/JP2007/067016 JP2007067016W WO2008029732A1 WO 2008029732 A1 WO2008029732 A1 WO 2008029732A1 JP 2007067016 W JP2007067016 W JP 2007067016W WO 2008029732 A1 WO2008029732 A1 WO 2008029732A1
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- router
- mobile terminal
- notification
- control device
- communication
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- 238000004891 communication Methods 0.000 title claims abstract description 156
- 238000000034 method Methods 0.000 title claims abstract description 84
- 238000012546 transfer Methods 0.000 claims abstract description 134
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- 238000012217 deletion Methods 0.000 claims description 58
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- 230000005012 migration Effects 0.000 claims description 15
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- 238000010586 diagram Methods 0.000 description 30
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Classifications
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- 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]
-
- 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
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
-
- 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
- H04W8/087—Mobility data transfer for preserving data network PoA address despite hand-offs
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
- H04W36/023—Buffering or recovering information during reselection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
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- 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 communication technology using a network based IP mobility protocol.
- Mobile IP Internet Protocol version 6
- OSI Open Systems Interconnection
- ISO International Organization for Standardization
- a communication protocol generally used in the current Internet TCP / IP (Transmission Control Protocol / Internet Protocol), IP address, as well as its location on the network. Also mean. Therefore, if you connect a node connected to one network to another network, the IP address will change and the session will not be able to continue.
- Mobile IP assigns a unique address to a node and replaces it with the IP address actually used in the TCP / IP stack, thereby assigning it to an upper layer or a communication partner in any network. It provides a mechanism to communicate by unique address and make it appear as if it is a power (see Non-Patent Document 1, for example).
- This Mobile IP is a mobile node (Mobile Node, hereinafter referred to as "MN”), a home agent (Home Agent, hereinafter referred to as "HA”), a correspondent node (Correspondent Node). , Hereinafter referred to as “CN”).
- MN Mobile Node
- HA Home Agent
- CN correspondent node
- the MN has an always-unchangeable address called a Home Address (hereinafter, referred to as “HoA”), and a node managing the address is an HA.
- HoA Home Address
- MN is HA
- Care-of-Address care-of address, hereinafter referred to as "CoA”
- CoA Care-of address
- Router Advertisement (hereinafter referred to as "RA") or D for stateful address autoconfiguration
- the MN sends the CoA obtained here to the HA with a message of Binding Update (Binding Update, hereinafter referred to as "BU").
- Binding Update hereinafter referred to as "BU"
- CoA is used for the source address or destination address of the actual IPv6 packet.
- technologies such as IPv6 in IPv6 encapsulation and mobility header are used. As a result, the application is notified of Ho A, and the actual IPv6 address (CoA) to be used is hidden!
- This FMIPv6 will be described by taking FIG. 21 as an example.
- the S 1201 RtSolPr (Router Solicitation for Proxy Advertiser, hereinafter referred to as “RtSolPr”) of S 1201 in FIG. 21 is for a host used in normal IPv6 to generate a router advertisement for the router. This is an extension of the message sent by the router (solicitation) (router solicitation) for FMIPv6.
- the MN sends this RtSolPr to a PAR (Previous Access Router, hereinafter referred to as a communicating Access Router, hereinafter referred to as "PAR").
- PAR Previous Access Router
- PrRtAdv Proxy Router Advertisement
- FBU Fest Binding Update
- NAR New Access Router, move destination access router, “NAR” below. Because it is an address that belongs to the link), PAR can transfer packets to NAR.
- the PAR that has received the FBU from the MN transmits HI (Handover Initiate, hereinafter referred to as "HI") to initialize the MN switching and handover to the NAR in S1204.
- HI Handover Initiate
- the NAR sends an HAck (Handover Acknowledgment, hereinafter referred to as "HAck") to the PAR as a confirmation for this HI at S 1205, and packet transfer between PAR-NAR is started at S 1206.
- FNA Fest Neighbor Advertisement
- the Mobile IP described above is called a host-based mobility protocol because it manages mobility by signaling initiated by the mobile terminal.
- the network-based IP mobility protocol which provides mobility control signaling on the network side and allows MNs to move without having to install a special protocol for movement, is known as Internet Engineering (IETF). Further proposed by Task Force) (see, for example, non-patent document 3).
- the router of the link destination of the movement destination which is described as “NewMAG” in FIG. 22 in FIG. 22, the mopile 'Access' gateway (Mobile Access Gateway, hereinafter, “MAG” and! / , U), RS (Router Solicitation, Router solicitation,
- Network Configuration Request message such as “RS”
- DHCP Request Send a Network Configuration (Network Configuration) Request message such as “RS”) or DHCP Request.
- the MAG is a control device that controls the MN and IP mobility that have moved to the link.
- Norate router, low power nore 'mobility' anchor (Local Mobility Anchor, hereinafter referred to as “L
- a router that relays to and from MA.
- LMA controls multiple MAGs connected by a network.
- LMA is M
- the storage unit manages N and MAG identifiers and IP addresses.
- the MAG also manages the MN and LMA identifiers and IP addresses in the storage unit. Information managed by these MAGs can be obtained by communicating with the LMA.
- IPv6 IPv6 encapsulation
- tunneling can be performed by referring to the information managed in the storage section and adding a header, and routing can be performed correctly.
- the MN transmits, for example, an RS to the MAG of the same link to which it has moved.
- the MAG Upon receiving the RS from the MN, the MAG (NewMAG) transmits a location registration process (location registration request) to the LMA in S1302.
- LMA When LMA receives location registration, it detects that it is a handover, sends a routing setup to MAG (NewMAG) in S 1303 and sets up a tunnel route between N owMAG and LMA.
- MAG NewMAG
- LMA encapsulates a packet for MN and MAG (New
- the MAG (NewMAG) that receives this routing setup receives the LM at S1304. Send confirmation routing setup Ack to A.
- the LMA that has received the location registration process from the MAG (NewMAG) transmits a location registration process Ack of confirmation to the MAG (NewMAG) in S1305.
- the MAG (NewMAG) transmits an RA to the MN at SI 306, and the MN performs address configuration (address setting).
- the MN sends a DAD (Duplicate Addres s Detection, hereinafter referred to as “DAD”) to the MAG (NewMAG) as a NA (Neighbor Adver tisement, a neighbor advertisement, hereinafter, “NA”.
- DAD Downlicate Addres s Detection
- NA Neighbor Adver tisement, a neighbor advertisement, hereinafter, “NA”.
- MAG NewMAG transmits MN address setup to LMA at S1308, and LMA transmits MN address setup Ack to M AG (NewMAG) at S1309.
- the packet can be reached by the MN.
- This is the handover method of network-based IP mobility protocol.
- the completion of the tunnel between the LMA and the MAG enables routing to the MN.
- Non-Patent Document 1 Request for Comments (RFC) 3775, 'Mobility Support in IPv6'
- Non Patent Literature 2 Request for Comments (RFC) 4068, "Fast Handovers for Mobile IPv6"
- Non Patent Literature 3 Disclosure of Internet Draft draft-giaretta-netlmm-dt-protocol
- packets during handover may be dropped, and first handover can not be performed.
- the MN breaks the connection with the router (PreMAG) of the link of the movement source ( In the figure (1)), the connection with NewMAG is started, and the packet arriving at the LMA is also held by the LMA until the result reaches the LMA as a location registration ray ((2) in the figure). Without being able to do it, it always arrives at PreMAG. In other words, packets arriving at PreMAG have to be destroyed after a certain period of time.
- the present invention has been made in consideration of the above problems, and in a network-based IP mobility protocol that can be moved without the mobile terminal having a special protocol, packet loss during handover. It is an object of the present invention to provide a communication system, a control device, a router, and a communication method thereof that make it possible to effectively eliminate the resources of the router.
- the communication system using the network-based IP mobility protocol according to the first invention utilizes the network-based IP mobility protocol, and the mobile terminal receives an address given by A communication system that exchanges data by transmitting and receiving data from a router belonging to the same link, and when the mobile terminal moves to another network, switches communication under control of the control device,
- the router in the network to which the mobile terminal has moved receives the notification including the identifier of the mobile terminal from the mobile terminal, and transmits the notification including the identifier of the mobile terminal and the identifier of the router to the control device.
- the control device transmits a forwarding instruction notification to the router as the migration source or migration destination of the mobile terminal so as to transfer data from the router of the migration source to the router of the migration destination.
- the router of the movement destination transmits the identifier of the mobile terminal to the information management device that performs authentication
- the information management apparatus is characterized by receiving information including address setting information on the mobile terminal and the control apparatus.
- the control device transmits from the router of the movement source and the router of the movement destination. Data is transmitted to the mobile terminal, and after communication between the control device, the router of the movement destination and the router of the movement destination, and the mobile terminal is established, the control device passes only the router of the movement destination. And transmitting data to the mobile terminal.
- the control is performed.
- the apparatus is characterized by transmitting a transfer cancellation instruction notification instructing cancellation of the setting of the transfer.
- the router of the movement source detects that the buffer for transferring with respect to the mobile terminal has run out of data. And transmitting, to the destination router, a forwarding cancellation instruction notification for canceling forwarding setting.
- the router of the movement destination receives the communication end notification from the mobile terminal, or the communication of the mobile terminal When an abnormal end of the is detected, a transfer cancellation instruction notification for canceling the transfer setting is transmitted to the migration source router.
- a control device uses a network-based IP mobility protocol, and a system in which a mobile terminal communicates by transmitting and receiving data from a router belonging to the same link with an address uniquely assigned. And a control device that performs control to switch communication when the mobile terminal moves to another network,
- Communication means for receiving a notification including the identifier of the mobile terminal and the identifier of the router from the router in the network to which the mobile terminal has moved; communication information regarding the router for relaying and the mobile terminal Refers to the storage means for the communication information of the mobile terminal from the storage means held and the identifier of the mobile terminal included in the notification from the router, updates the information of the router of the movement destination, and from the router of the movement source Control means for generating a transfer instruction notice instructing transfer of data to the destination router; And the communication means transmits the transfer instruction notification to the router as the movement source or movement destination of the mobile terminal.
- control means uses the identifier of the router of the movement source of the mobile terminal from the identifier of the mobile terminal included in the notification from the router of the movement destination. It is extracted from the storage means that the forwarding instruction notification to the move source or the move destination router includes the identifier of the move destination router or the move source router identifier and the mobile terminal identifier. It features.
- control means instructs the router of the movement source to delete the communication information of the router related to the mobile terminal and the control device. And transmit to the router of the movement source via a communication means.
- control means combines the delete instruction notification and the transfer instruction notification and transmits the combined to the router of the movement source via the communication means. It features.
- control means It After the communication between the control device, the router of the movement destination and the router of the movement destination, and the mobile terminal is established, the control means It is characterized by transmitting data to a router.
- control means when the control means causes the router at the movement source to transfer and receive data addressed to the mobile terminal from another router, the control means A transfer setting cancellation notification including the identifier of the mobile terminal and the identifiers of the other routers is generated to delete the setting, and the communication means transmits the transfer instruction notification to the migration source router, and The transmission setting cancellation notification is transmitted.
- control means when the control means causes the router at the movement source to transfer and receive data addressed to the mobile terminal from another router, the control means A transfer setting cancellation notification including the identifier of the mobile terminal and the identifiers of the other routers is generated to delete the setting, and the communication means transmits the transfer instruction notification to the migration source router, and The transmission setting cancellation notification is transmitted.
- control means is connected to the router of the movement source.
- the transfer instruction notification and the transfer setting cancellation notification may be combined and transmitted.
- control device is characterized in that the control means combines the transfer instruction notification and the transfer setting cancellation notification to the router of the movement source and transmits it.
- control means combines the notification instructing cancellation of the communication with the control device and the transfer setting cancellation notification to the router of the movement source and transmits the notification. It is characterized by
- control means combines the notification instructing cancellation of the communication with the control device and the transfer setting cancellation notification to the router of the movement source and transmits the notification. It is characterized by
- the router according to the eighteenth invention transmits and receives data to and from a mobile terminal belonging to the same link performing communication by the uniquely assigned address under control of the control device using network-based IP mobility protocol.
- the communication means comprises: communication means for receiving a notice from a mobile terminal that has moved, and control means for generating a notice including the identifier of the mobile terminal to be sent to the control device and the identifier of the router;
- the notification is transmitted to the control device, and the control means transfers the data received from the router of the moving source to the mobile terminal by the transfer instruction notification from the control device or the notification from the router of the movement source.
- the router according to the nineteenth invention when the control means receives a transfer instruction notification for a mobile terminal moved from the control device to another network, the router according to the nineteenth invention moves the router to the move destination router. It is characterized in that data addressed to the terminal is transferred.
- control means transfers the data addressed to the mobile terminal by attaching the address of the router of the movement destination as a header.
- the communication means transmits the received identifier of the mobile terminal to the information management apparatus performing authentication, and the information management apparatus transmits the mobile terminal and the control apparatus.
- Receiving information including address setting information related to.
- a router comprises storage means for storing communication information related to the mobile terminal, and the control means is configured to store the storage means when receiving a deletion instruction notification from the control device.
- Communication information of the router and the control device regarding the mobile terminal It is characterized in that
- the control means instructs the cancellation of the transfer setting which has transferred and received data addressed to the mobile terminal from another router, from the control device.
- a transmission setting release notification including the identifier of the mobile terminal and the identifier of the router is transmitted to another router.
- the communication means receives a combination of the transfer setting cancellation notification and the transfer instruction notification from the control device.
- the communication means receives the notification that the transfer setting cancellation notification is combined with the notification from the control device instructing cancellation of communication with the control device. It is characterized by
- the control means when the control means detects that there is no data in the buffer for transferring the mobile terminal, it cancels the transfer setting to the router of the movement destination. Sending a notification.
- the router according to the twenty-seventh aspect of the present invention in the case where the control means receives a communication end notification from the mobile terminal, or detects an abnormal end of communication of the mobile terminal, the router according to the twenty-seventh aspect
- the router is characterized by sending a notification for canceling the forwarding setting.
- the communication method according to the twenty-eighth invention uses the network-based IP mobility protocol to cause the mobile terminal to transmit and receive router data belonging to the same link with the uniquely assigned address, A communication method for causing a control device to perform control to switch communication of the mobile terminal when the mobile terminal moves to another network, wherein the mobile terminal generates a notification including an identifier of the mobile terminal. Causing the router at the destination to send the notification.
- the router of the movement destination is made to transmit the identifier of the mobile terminal to the information management device performing authentication, and the router of the movement destination is the information management device. And receiving information including address setting information related to the mobile terminal and the control device.
- the control device when the mobile terminal moves, data is transmitted to the mobile terminal via the router of the movement source and the router of the movement destination in the control device. After the communication between the control device and the router of the movement destination and the router of the movement destination is established, the control device transmits only the router of the movement destination to the mobile terminal. It is characterized by transmitting data.
- the router at the movement source when the router at the movement source transfers and receives data addressed to the mobile terminal from another router, the router at the movement source receives the data at the movement source. Effect of transmitting a transfer cancellation instruction notification instructing cancellation of the setting of the transfer.
- the network-based IP mobility protocol performs transfer of data by creating a tunnel to the router of the migration source, the router to the migration destination, and the control of the control device. This makes it possible to eliminate packet loss during handover.
- control unit notifies the router of the movement source of a transfer instruction of a buffer of packets addressed to the mobile terminal, and a deletion instruction notification of instructing to delete the communication setting between the control unit and the router of the movement source.
- control device notifies the router of the movement source of a transfer instruction of the buffer of the packet addressed to the mobile terminal, and the unnecessary communication setting between the router of the movement source and other routers. Cutting By combining and transmitting the deletion instruction notification to be canceled, it is possible to smoothly perform the processing of buffer transfer and deletion of the tunnel setting between unnecessary routers.
- control device instructs the router of the movement source to delete the communication setting between the control device and the router of the movement source, a deletion instruction notification, and the router of the movement source and the other routers. Between the control device and the router of the move source by combining it with the delete instruction notification that instructs deletion of the unnecessary communication settings, and the tunnel setting between the unnecessary routers. It is possible to process smoothly with the deletion of.
- the present invention works even when the router acquires information including the address setting information of the mobile terminal and the control apparatus from the information management apparatus (server) by applying the Proxy Mobile IP method. It is similar.
- FIG. 1 is a view showing a schematic configuration of a network in a first embodiment.
- FIG. 2 is a sequence diagram showing a procedure of processing in the first embodiment.
- FIG. 3 is a block diagram showing the configuration of MAG in the present invention.
- FIG. 4 is a block diagram showing the configuration of an LMA according to the present invention.
- FIG. 5 is a sequence diagram showing the procedure of processing in the second embodiment.
- FIG. 6 is a view showing a schematic configuration of a network in a third embodiment.
- FIG. 7 is a sequence diagram showing the procedure of processing in a third embodiment.
- FIG. 8 is a table showing the addresses of the respective devices in the third embodiment.
- FIG. 9 A diagram showing a schematic configuration of a network and a flow of packets in a fourth embodiment.
- FIG. 10 is a sequence diagram showing the procedure of processing in the fourth embodiment.
- FIG. 11 is a view showing a schematic configuration of a network in the fifth embodiment.
- FIG. 12 is a sequence diagram showing the procedure of processing in the fifth embodiment.
- FIG. 13 is a sequence diagram showing a procedure of processing in a sixth embodiment.
- FIG. 14 is a sequence diagram showing a procedure of processing in a seventh embodiment.
- FIG. 15 is a sequence diagram showing a procedure of processing in the eighth embodiment.
- FIG. 16 is a sequence diagram showing a procedure of processing in a ninth embodiment.
- FIG. 17 is a view showing a schematic configuration of a network in a tenth embodiment.
- FIG. 18 is a sequence diagram showing a procedure of processing in the tenth embodiment.
- FIG. 19 is a view showing a schematic configuration of a network in an eleventh embodiment.
- FIG. 20 is a sequence diagram showing a procedure of processing in an eleventh embodiment.
- FIG. 21 is a sequence diagram showing a procedure of processing of the first handover method.
- FIG. 22 is a sequence diagram showing a procedure of processing of a handover method of a conventional network-based IP mobility protocol.
- FIG. 23 is a sequence diagram showing the procedure of the conventional network-based IP mobility protocol handover procedure.
- the MN and MAG usually have a wireless communication means, and in all the embodiments the handover is mainly described in the wireless communication, but the use in the wired communication is also possible. Since the communication means is not particularly limited, the details of the communication means will not be described.
- FIG. 1 is a view showing a schematic configuration of a network in the present embodiment.
- FIG. 2 is a sequence diagram showing the procedure of processing in the present embodiment.
- FIG. 3 is a block diagram showing the configuration of the MAG in the present embodiment.
- FIG. 4 is a block diagram showing the configuration of the LMA in this embodiment.
- the MAGs 2 and 3 communicate with the MN 1 through the MN communication unit 5, communicate with the other MAG or LMA 4 through the Netlmm communication unit 6, and the network base according to the present invention.
- the LMA 4 includes a Netlmm communication unit 10 for communicating with the MAGs 2 and 3, an external network communication unit 11 for communicating with an external network, and a network-based IP mobility according to the present invention. It is configured to include a Netlmm control means 12 which performs control according to a protocol, and a storage unit 13 which stores information related to communication and the like.
- the MN 1 transmits an RS including at least the MN-ID, which is an identifier of the MN 1, to the MAGb 3 or the link local multicast address.
- Netlmm control means 7 of MAGb 3 having received RS from MN communication means 5 stores MN-ID in storage unit 8 and, at S102, includes at least MN-ID, MAGb3 identifier, and M AGb- ID. Create location registration system and send it from Netlmm communication method 6 to L MA4.
- the LMM 4 Net lmm control means 12 which received the location registration from the Net lmm communication means 10 searches the current state of the MN 1 from the data held in the storage unit 13 of the LMA 4 using the MN-ID as a key. Then we grasp that MN1 is currently in the state of belonging to MAGa2.
- the Netlmm control means 12 of the LMA 4 recognizes that the data has moved the location registration unit from the force S that is in the state where the MN 1 currently belongs to the MAG a 2 and the location registration has come from the data.
- the Netlmm control means 12 of the LMA 4 is at least an identifier of the LMA 4 Generates a routing setup (routing setting instruction) including the LMA ID, which is the global address of MN1, and sends it to MAGb 3 from Netlmm communication means 10. Also, in S104, the Netlmm control means 12 of the LMA 4 sends a transfer indication notification including at least the MAGb-ID of the MAGb 3 and the MN-ID of the MN 1 to the MAGa 2.
- the Netlmm control means 7 of the MAGa 2 having received the transfer instruction notification transfers the packet addressed to the MN 1 address identified from the MN—ID to the IP address of the MAG b 3 identified from the MAGb ID at S 105.
- This transfer setting is performed by updating the routing table in the storage unit 8 of the MAGa 2. That is, in the routing table of MAGa2 up to now, the packet addressed to MN1 was associated with the link local address possessed by MN1. The routing table settings are updated so that packets addressed to MN1 are forwarded to MAGb3.
- the forwarding to the MAGb3 is such that the next hop of the packet addressed to the MN1 is forwarded to any of the link local address of the MAGb3, the global address of the MAGb3, the upper router address of the MAGb3, and the upper router address of the MAGa2. It realizes by setting.
- the Netbm control means 7 of the MAGb 3 Upon receiving the LMA 4 power, etc. routing setup, the Netbm control means 7 of the MAGb 3 sets a tunnel path between the LMA 4 and the MAGb 3 and sends a confirmation routing setup acknowledgment (Acknowledgement) to the LMA 4 at S106.
- the LMA4 Netlmm control means 12 of the LMA 4 Upon receiving the MAGb3 power, etc. routing setup Ack, the LMA4 Netlmm control means 12 of the LMA 4 transmits a location registration ray Ack including at least prefix information of the MN 1 to the MAG b 3 at S107.
- the Netlmm control means 7 of the MAGb 3 having received the location registration Ack transmits an RA to the MN 1 based on the prefix information at S 108.
- MN1 Upon receiving RA from MAGb3, MN1 transmits NA to the link in DAD procedure in S109. After receiving this NA from MN1, MAGb3 Netlmm control means 7 sends an MN address setup including MAGb ID, MN address, and MN ID to LMA 4 in S 110, and in S 111, LMA 4 The Netlmm control means 12 sends a confirmation MN address setup Ack to the MAGb 3.
- the Netlmm control means 7 of the MAGb 3 transmits the MAGa 2 force to the MN 1, Start delivering the packet, including the forwarding of
- FIG. 5 is a sequence diagram showing the procedure of processing in the present embodiment.
- the MN 1 moves from the link of the MAG a 2 to the link of the MAG b 3.
- the LMA 4 transmits a transfer instruction notification to the move destination router MAGb 3 to the move source router MAGa 2, while in the present embodiment, the LMA 4 Is to transmit a transfer instruction notification to MAGb3.
- the MN 1 transmits an RS including at least an MN-ID, which is an identifier of the MN 1, to the MAGb 3 or the link local multicast address.
- the Netlmm control means 7 of the MAGb 3 having received the RS from the MN 1 transmits a location registration system including at least the MN-ID and the MAGb- 3 identifier MAGb-ID to the LMA 4 at S202.
- the LLM4 Netlmm control means 12 receiving the location registration process from the MAGb3 searches the data holding the current state of the MN1 in the storage unit 13 of the LMA4 using the MN-ID as a key. In the data, we understand that MN1 currently belongs to MAGa2.
- the Netlmm control means 12 of the LMA 4 recognizes that the data has moved the location registration unit from the force MAGb 3 in which the MN 1 is currently in a state of belonging to the MAGa 2.
- the Netlmm control means 12 of the LMA 4 is compared to the MAGb 3 by
- the Netlmm control means 12 of the LMA 4 transmits, to the MAGb 3, a transfer indication notification including at least the identifier of the MAGa 2, the MAGa-ID, and the MN-ID of the MN 1.
- This LMA4 to MAGb3 transfer indication notification may be sent in addition to the normal routing setup.
- Netlmm control means 7 of MAGb 3 having received the transfer instruction notification from LMA 4, at S 204, at least MN-ID and MAGb-MAGb-ID are addressed to the IP address of MAGa 2 grasped from MAGa-ID of MAGa 2.
- Send tunnel creation message including.
- the tunnel route is realized by IPv6 in IPv6 encapsulation with the MAGb3 IP address as the outer destination address and the MAGa2 IP address as the outer source address.
- the Netbm control means 7 of the MAGb 3 Upon receiving the routing setup, the Netbm control means 7 of the MAGb 3 sets a tunnel path between the LMA 4 and the MAGb 3 and sends a routing setup Ack to the LM A 4 in S206.
- the Netlmm control means 7 of the MAGa2 that received the transfer instruction transfers the packet addressed to the MN1's address identified in S207 by the MN-ID power in S207 to the IP address of the MAGb3 identified from the MAGb-ID. To start.
- the LLM 4's Netlmm control means 12 Upon receiving the MAGb 3 power, etc. routing setup Ack, the LLM 4's Netlmm control means 12 transmits a location registration ack including at least prefix information of the MN 1 to the MAG b 3 at S208.
- the Netlmm control means 7 of the MAGb 3 having received the location registration ack from the LMA 4 sends an RA to the MN 1 based on the prefix information at S 209.
- the MN 1 that receives the MAGb 3 RA, etc. sends an NA to the link in the DAD procedure at S210.
- the Netlmm control means 7 of the MAGb 3 transmits an MN address setup including the MAGb ID, MN address, and MN ID to the LMA 4, and in S212, the LMA 4
- the Netlmm control means 12 sends a confirmation MN address setup Ack to the MAGb 3.
- the Netlmm control means 7 of the MAGb 3 starts delivery of packets addressed to the MNl including the transfer from the MAGa 2 at S213.
- the LMA 4 instructs the transfer to the MAGb 3 and the case where tunneling is performed by the offer from the MAGb 3 to the MA Ga 2 has been described.
- packets addressed to MN1 accumulated in the buffer of MAGa2 will be transferred via MAGb3 and packet loss during handover can be eliminated.
- FIG. 6 is a view showing a schematic configuration of a network in the present embodiment.
- FIG. 7 is a sequence diagram showing the procedure of processing in the present embodiment.
- FIG. 8 is a table showing the addresses of the respective devices in this embodiment.
- MNa21 and MNb22 are under the control of MAGa2.
- An example will be described in which MNa21 and MNb22 move from being under MAGa2 to move to MAGb3 along with the movement of MNa21 and MNb22.
- MNa21 and MNb22 also, MAGb3 (or link local multicast address addressed to at least MNa21 and MNb22 identifiers MNa-ID and MNb-).
- Send RS including ID.
- MNa-ID and MNb-ID link local addresses (IP-LINK-MNa, IP-LINK-MNb) and / or global address of MNa21 and MNb22 shown in FIG. (IP-GLOBAL-MNa, IP-GLOBAL-MNb) is used.
- MAGb-ID uses the link local address (IP-LINK-MAGb) and / or the global address (IP-GLOBAL-MAGb) that MAGb has.
- This location registration procedure is sent separately for each of MNa21 and MNb22. Or both may be sent in one message.
- the LLM4 Netlmm control means 12 which received the location registration process from the MAGb 3 uses the MNa-ID and MNb-ID as keys to store the current MNa21 and MNb22 states in the storage unit 13 of the LMA 4.
- the data of LMA4 is retrieved to understand that MNa21 and MNb22 currently belong to MAGa2.
- the LLM4's Netlmm control unit 12 recognizes from the data that MNa21 and MNb22 are currently in the state of belonging to MAGa2, but that the location registration process from MAGb3 has moved MNa21 and MNb22. Do.
- the Netlmm control means 12 of the LMA 4 sends a routing setup to the MAG b3.
- the Netlmm control means 12 of the LMA 4 sends at least the MAGb-ID (IP-LINK-MAGb and / or the IP-GLOBA L-MAGb) and the MNa21 of the MAGb2 to the MAGa2.
- This transfer instruction notification may be made individually for MNa21 and MNb22, or may be performed together.
- a location deregistration system (location deletion request) is sent to MAGa2. Transfer indication notification to MAGa2 may be included in this location deregistration process.
- the Netlmm control means 7 of MAGa2 having received the transfer instruction is addressed to the address of MNa21 or MNb22 identified from MNa-ID, MNb-ID at S305 (the destination address is IP-GLOBAL-MNa or IP-).
- the destination address is IP-GLOBAL-MNa or IP-.
- packets to the IP address of MAGb 3 identified by MAGb ID, etc. offer tunnel creation between MAGa-MAGb to MAGb 3.
- the MAGb 3 Netlmm control means 7 sets up a tunnel path between the LMA 4 and the MAG b 3 and sends a routing setup Ack to the LMA 4 at S306.
- Netlmm control means of MAGb3 that receives a tunnel creation request from MAGa2 7 returns a tunnel generation Ack to MAGa2 as a confirmation at S307.
- the Netlmm control means 7 of MAGa 2 receives this tunnel creation Ack of MAGb 3 and creates a tunnel between MAGa and MAGb.
- This tunnel is encapsulated by IPV6 in IP v6 using the MAGb3 global address (IP-GLOBAL-MAGb) as the outer destination address and the MAGa2 global address (IP-GLOBAL-MAGa) as the outer source address.
- IP-GLOBAL-MAGa IP-GLOBAL-MAGa
- this tunnel is a tunnel through which MNa21 and MNb22 (destination address is IP-GLOBAL-MNa or IP-GLOBAL-MNb) packets.
- MNa21 and MNb22 destination address is IP-GLOBAL-MNa or IP-GLOBAL-MNb
- MAGa2 can identify unreached buckets to MNa21 and / or MNb22 using the technology of layer 2 and below of the OSI basic reference model.
- This unreached packet is stored in the buffer of MAGa 2 and transferred to MAGb 3 at S 308 sequentially after tunnel creation.
- the LLM4 Netlmm control unit 12 receiving the routing setup Ack from the MAGb 3 transmits a location registration race Ack including at least prefix information of the MN to the MAGb 3 at S309.
- the Netlmm control means 7 of the MAGb 3 having received the location registration Ack transmits RA to the MNa 21 and the MNb 22 based on the prefix information at S 310.
- MNa21 and MNb22 Upon receiving RA from MAGb3, MNa21 and MNb22 transmit NA to the link in the DAD procedure at S311.
- the MAGb 3 starts delivery of a notebook addressed to MNa 21 and MNb 22.
- LMA 4 eliminates the tunneling of LMA and MAGa 2 by including the transfer instruction to MAGb 3 with the ID of MAGb 3 in the location deregistration process transmitted to MAGa 2 to eliminate the tunneling. It is possible to smoothly configure tunneling settings for transfer from MAGa2 to MAGb3.
- FIG. 9 is a view showing a schematic configuration of a network and a flow of packets in the present embodiment.
- FIG. 10 is a sequence diagram showing the procedure of processing in the present embodiment.
- MN1 is subordinate to MAGa2.
- the packet at this time is delivered as shown by the thick arrow in Fig. 9 (a).
- MN1 moves under the control of MAGb3.
- LMA4 delivers a packet from MAGb3 to MN1 via MAGa2 (Fig. 9 (b), Fig. 9 (c)), and then does not pass through MAGa2.
- An example of switching from LMA4 to MAGb3 and from MAGb3 to MN1 (Fig. 9 (d)) will be described.
- the MN1 When moving to the link of the MN1 force MAGb3, as shown in FIG. 10, at S401, the MN1 sends an MN-ID that is at least an identifier of the MN1 to the MAGb3 or link-local multicast RS, DHCP Request , Send network configuration request such as NA.
- the MAGb3 Netlmm control means 7 Upon receiving the network configuration request from the MN1, the MAGb3 Netlmm control means 7 transmits to the LMA 4 a location registration system including at least its own identifier, MAGb-ID and the MN ID just received in S402.
- LLM4 Netlmm control means 12 When LLM4 Netlmm control means 12 receives location registration information from MAGb3, it searches the data stored in LMA4's storage section 13 using the MN-ID as a key from the data stored in LMA4's data. It is understood that MN1 is currently in a state of belonging to MAGa2. The Netlmm control means 12 of the LMA 4 recognizes that the data has moved the location registration unit from the force MAGb 3 in which the MN 1 is currently in a state of belonging to the MAGa 2.
- the Netlmm control means 12 of the LMA 4 is the former MAG of the MN 1
- a transfer indication notification including MN-ID, MAGb-ID of MAGb3 and global address of MN1 is sent to MAGa2, and at least an identifier of LMA4, LMA-ID, MN1 to MAGb3 at S404.
- Netamm control means 7 of MAGa2 that received the transfer instruction sends a tunnel creation offer to MA Gb3
- Netlmm control means 7 of MAGb3 sends a tunnel creation Ack to MAGa2 to transmit MAGa2 — Create a tunnel between MAGb3.
- the socket is routed in the path from LMA4 and so on, MAGa2 and MAGa2 and so on and MAGb3 and MAGb3 to MN1.
- the Netlmm control means 7 of the MAGb 3 that has received the routing setup from the LMA 4 sends a routing setup Ack to the LMA 4 at S 408.
- the LLM4 Netlmm control means 12 that has received the routing setup Ack from the MAGb 3 transmits a location registration Ack including at least the prefix information of the MN 1 to the MAGb 3 in S409.
- the Netlmm control unit 7 of the MAGb 3 that has received the location registration process Ack from the LMA 4 creates address configuration information for the MN 1 such as RA from the prefix information in S 410 and sends it to the MN 1.
- the MN 1 configures the address and performs DAD on the MAG b 3 using NA for final confirmation.
- the Netlmm control means 7 of the MAGb 3 transmits at least the MAGb-ID, MN address, and MN-ID 3 ⁇ 4 t ⁇ MN address setup of the MAGb 3 to the LMA 4 at S 412.
- DAD can be omitted, MAGb3 sends an address to MN1 by DHCP Advertise etc., then sends MN address setup to LMA4, and proceeds to the following procedure. It can also be done.
- the Netlmm control means 12 of the LMA 4 transmits the MN address setup Ack to the MAGb 3.
- the Netlmm control means 7 of the MAGb 3 receives the packet addressed to the MN1 received from the MAGa2. Start delivery.
- an LMA-MAGb tunnel is created. I assume. Also, after this tunnel is created, in order to delete the LMA-MAGa tunnel, the Netlmm control means 12 of LMA 4 transmits a location deregistration system to MAGa 2 at S417, and at S418, Netlmm control means of MAGa 2 7 Sends a location deregistration ack to LMA 4 to clear the tunneling configuration.
- the Netlmm control means 12 of the LMA 4 starts to transfer the packet to the MAG b 3.
- the packet delivery path is sequentially switched from LMA4 to MNl via MAGa2 and MAGb3 and from LMA4 to MN1 via MAGb3 as compared to the first to third embodiments. It is possible to reduce the number of packets addressed to MN1 in the buffer of S.
- FIG. 11 is a view showing a schematic configuration of a network in the present embodiment.
- FIG. 12 is a sequence diagram showing the procedure of processing in this embodiment. As shown in FIG. 11, first, an example in which MN1 moves from the link of MAGa2 to the link of MAGb3 and then to the link of MAGc31, and the LMA4 controls the communication switching of MN1 will be described.
- the MN 1 switches communication with the three MAGs.
- the MN 1 transmits information for network configuration to the MAG c, which is the MAG of the new link, as usual.
- This information may be, for example, RS, DHCP Request, NA, etc.
- the information for this network configuration includes the MN's identifier MN-ID.
- the Netlmm control means 7 of the MAG c 31 stores the information of the MN in the storage unit 8 and transmits a location registration system to the LMA 4 at S 502.
- This location registration system contains the MAGc 31 identifier, MAGc-ID and MN-ID.
- the LLM4 Netlmm control means 12 which received the location registration process from the MAGc 31 searches the database having the MN-ID in the storage unit 13 using the MN-ID as a key, and the MN1 is currently linked to the MAGb3 link on the data. State, MAGb3 tunnels with MAGa2 Recognize having. As a result of receiving the location registration, the Netlmm control means 12 of LMA 4 detects that MN 1 is moving and is a handover, and MAGb-ID, MAGc-ID and MN-ID, and MAGa-ID, MAGb — ID and MN— Temporarily store the ID in pairs.
- step S503 the Netlmm control means 12 of the LMA 4 generates a routing setup (routing setting instruction) including at least the LMA 4 identifier LMA-ID and the global address of the MN1, and the Netlmm communication means 10 Send to MAGc31.
- a routing setup routing setting instruction
- the Netlmm control means 12 of the LMA 4 sends the MAGb 3 a notification instructing transfer of the packet addressed to the MN 1 to the MAG c 31 and deletion of the tunnel with the MAG a 2.
- the indication notification includes at least MAGa-ID, MAGc-ID and MN-ID, and indicates that it is a tunnel deletion (for packets addressed to MN1) associated with MAGa-ID, associated with MAGc-ID. It is desirable that the control information of the indication notification be described that tunnel creation (for packets addressed to MN1) is made, and that these control information be combined and simultaneously transmitted.
- Netlmm control means 12 of LMA 4 accesses the database held in storage unit 13, and in the data on the tunnel between MAG and MAG in the communication information on MN1, the information on the tunnel between MAGb3 and MAGa2 is It is deleted and stores information that a new tunnel between MAGc 31 and MAGb 3 has been created.
- the Netlmm control means 7 of MAGb3 receives the instruction to transfer from LMA4 and the instruction to delete the tunnel, and at S505, deletes the tunnel including at least MAGb-ID and MN-ID for MAGa2.
- the instruction notification describing control information for offering tunnel creation including at least MAGb ID and MN ID is transmitted to MAG c31.
- step S507 the Netamm control means 7 of the MAGa2 deletes the tunnel setting between the MAGa2 and the MAGb3 from the routing table in the storage unit 8, transmits a confirmation tunnel deletion Ack to the MA Gb3, and deletes the tunnel.
- the Netamm control means 7 of the MAGa2 deletes the tunnel setting between the MAGa2 and the MAGb3 from the routing table in the storage unit 8, transmits a confirmation tunnel deletion Ack to the MA Gb3, and deletes the tunnel.
- the Netlmm control means 7 of the MAGc 31 is a routing tape in the storage unit 8. Configure tunnels with MAGb3 for packets addressed to MNl in the same route and send a confirmation tunnel creation Ack to MAGb3. Then, the packet addressed to MN1 will be forwarded to MAGc 31 in S509.
- the Netlmm control means 7 of the MAGc 31 that has received the routing setup from the LMA 4 sends a routing setup Ack to the LMA 4 at S 510.
- the LLM4 Netlmm control means 12 receiving the routing setup Ack from the MAGc 31 transmits a location registration Ack including at least the prefix information of the MN 1 to the MAGc 31 in S511.
- the Netlmm control means 12 of the LMA 4 transmits location deregistration to the MAGb 3 in order to delete the tunnel between the LMA 4 and the MAGb 3 with respect to the MAGb 3.
- the Netlmm control means of the MAGb 3 7 deletes the tunneling setting relating to the LMA4 and MAGb3 from the routing table in the storage unit 8 and transmits the location deregistration system Ack to the LMA 4 to clear the tunneling setting.
- the Netlmm control means 7 of the MAGc 31 which receives the location registration process Ack from the LMA 4 generates address configuration information for the MN 1 such as RA and the prefix information force in S 514 and transmits it to the MN 1.
- the MN 1 configures the address and sends a DAD to the MAGc 31 using NA for final confirmation.
- the Netlm control unit 7 of the MAGc 31 transmits an MN address setup including at least the MAGc ID, the MN address, and the MN ID to the LMA 4 in S516.
- the Netlmm control means 12 of the LMA 4 accesses the database of the storage unit 13 and deletes the MAGb 3 data in the data on the MAG that delivers the packet in the communication information about the MN 1, MAGc 31
- the MN address set-up Ack is transmitted to the MAGc 31 and the Netlmm control means 12 of the LMA 4 starts to transfer the packet to the MAGc 31 at S518.
- the Netlmm control means 7 of the MAGc 31 starts delivering the packet addressed to the MN 1 at S519.
- FIG. 13 is a sequence diagram showing the procedure of processing in the present embodiment.
- the case where the MN1 moves from MAGa2 to MAGb3 will be described as an example, and the buffer S of the source router MAGa2 has no packets addressed to MN1. So, there is a feature that MAGa2 itself cancels the tunnel with MAGb3.
- the MN 1 transmits information for network configuration, for example, RS, to the new MAG, MAGb 3 as usual.
- This information includes the MN's identifier, MN—ID.
- Net lmm control means 7 of MAG b 3 transmits location registration to LMA 4 based on the received information. This location registration system
- the LLM4 Netlmm control means 12 that received the location registration search the database having the MN-ID in the storage unit 13 with the key, and in terms of the data, the MN1 is currently under the control of the MAGa2. recognize.
- Net lmm control means 12 of LMA 4 detects that MN 1 is moving and being handed over, and temporarily sets MAGa ID, MAG b ID and MN ID as a pair.
- the Netlmm control means 12 of the LMA 4 sends a notification to the MAG a2 instructing transfer of a packet addressed to the MN 1 to the MAG b 3.
- This indication notification contains at least MAGb-ID and MN-ID, and at the same time describes control information to the effect that it is tunnel creation (for packets to MN1) in association with MAGb-ID. Is desirable.
- the Netlmm control means 12 of the LMA 4 generates a routing setup including at least the LMA 4 identifier LMA-ID and the global address of the MN 1 and transmits it to the MAG b 3.
- the Netlmm control means 7 of the MAGa2 receives the transfer instruction from the LMA4, and at S605, offers the MAGb3 tunnel creation including at least MAGa-ID and MN-ID.
- Netlmm control means 7 of MAGb 3 sets up the tunneling with MAGa 2 for the packet addressed to MN 1 in the routing tape in storage unit 8 and transmits a tunnel creation Ack of confirmation to MAGa 2.
- a tunnel for buffer transfer of MAGa2 is created between MAGa2 and MAGb3, and MAGa2 starts transfer of a packet addressed to MN1 to MAGb3 at S607.
- the Netlmm control means 7 of the MAGb 3 that has received the routing setup from the LMA 4 sends a routing setup Ack to the LMA 4 at S 608.
- the Netlmm control means 12 of the LMA 4 Upon receiving the routing setup Ack from the MAGb 3, the Netlmm control means 12 of the LMA 4 sends a location registration Ack including at least the prefix information of the MN 1 to the MAGb 3 at S609.
- the Netlmm control unit 7 of the MAGb 3 receiving the location registration process Ack from the LMA 4 creates address configuration information for the MN 1 such as RA from the prefix information in S 610 and sends it to the MN 1.
- the MN 1 configures the address and performs DAD on the MAGb 3 using NA for final confirmation.
- the Netlmm control means 7 of the MAGb 3 receives at least the MAGb-ID of the MAGb 3, the MN address, the MN-ID 3 ⁇ 4 ⁇ t?
- the Netlmm control means 12 of the LMA 4 accesses the database of the storage unit 13 and delivers the packet in the communication information about the MN 1.
- the data of the MAGa 2 is deleted and the data of the MAGb 3 is stored
- a tunnel is generated between MAGb 3 and LMA 4
- MN address setup Ack is transmitted to MAGb 3 at S 613
- the N et l mm control means 12 of LMA 4 starts forwarding the packet to MAG b 3 at S 614.
- the MA Gb3 Netlmm control means 7 starts delivering the packet addressed to the MN1 at S615.
- the Netlmm control means 7 of the MAGa 2 monitors the buffer in the temporary storage unit 9 and, when the buffer reaches 0, notifies the MAGb 3 of tunnel deletion and deletes the tunnel. That is, at S 616, Netamm control means 7 of MAGa 2 deletes the tunnel setting between MAGa 2 and MAGb 3 from the routing table in storage unit 8 and notifies MAGb 3 of a notification instructing deletion of the tunnel.
- This indication notification includes at least MAGa-ID and MN-ID, and is described in the control information of the indication notification that it is a tunnel deletion (for a packet addressed to MN1) in association with the MAGa-ID. Is desirable.
- the Netbmm control means 7 of the MAGb 3 transmits a tunnel deletion Ack of confirmation to the MAGa2.
- the Netlmm control means 12 of the LMA 4 sends a location deregistration system to the MAGa 2 in order to delete the tunnel between the LMA 4 and the MAGa 2 to the MAGa 2.
- the Netlmm control means of the MAGa 2 7 deletes the tunneling setting relating to the LMA4 and MAGa2 from the routing table in the storage unit 8 and transmits the location deregistration system Ack to the LMA 4 to clear the tunneling setting.
- the transfer source MAG buffer reaches 0
- the transfer source MAG automatically cancels the tunnel setting with the transfer destination MAG, so the MAG resource Can be effectively released.
- FIG. 14 is a sequence diagram showing the procedure of processing in this embodiment.
- the MN 1 moves to the link of the MAGa 2 and the link to the MAGb 3 and then to the link of the MAGc 31 will be described.
- the difference from the fifth embodiment is that the MAGb 3 deletes the tunnel with the MAGa 2 upon receiving the location deregistration from the LMA 4.
- the MN 1 transmits information for network configuration to the new MAG, MAGc 31, as usual.
- This information may be, for example, RS, DHCP Request, NA or the like.
- This information includes at least the MN's identifier MN-ID.
- the Netlmm control means 7 of the MAG c 31 transmits location registration to the LMA 4 based on the received information.
- This location registration system Contains the MAGc 31 identifier, MAGc—ID and MN—ID.
- the LLM4 Netlmm control means 12 that has received the location registration search the database having the MN-ID in the storage unit 13 using the key, and the data is currently in the state where MN1 is at the link of M AGb3; MAGb3 recognizes that it has a tunnel with MAGa2.
- the LLM4's Netlmm control means 12 detects that the MN1 is moving and being handed over, and MAGb-ID, MAG c ID and MN-ID, and MAGa-ID, MAGb — ID and MN—Set a pair temporarily and store in S703 a routing setup including at least LMA 4's identifier LMA—ID and MNl global address and send it to MAGc 31
- the Netlmm control means 12 of the LMA 4 sends a notification of transfer instruction of the packet addressed to the MN 1 to the MAG c 31 to the MAG b 3.
- This indication notification includes at least the MAGc-ID and the MN-ID, and in association with the MAGc-ID, the control information to the effect that it is tunnel creation (for packets to MN1) is described! Is desirable! /.
- the Netlmm control means 12 of the LMA 4 accesses the communication information on the MN 1 of the database of the storage unit 13 to create a tunnel between MAGb 3 and MAGc 31 in the data on the tunnel between MAG and MAG. Store information to the effect.
- the Netlmm control means 7 of the MAGb 3 receives the instruction of transfer from the LMA 4, and offers tunnel generation including at least MAGb-ID and MN-ID to the MAGc 31 in S705.
- the Netlmm control means 7 of the MAGc 31 sets tunneling with the MAGb 3 regarding the packet addressed to the MN 1 in the routing tape in the storage unit 8, and transmits a tunnel creation Ack of confirmation to the MAGb 3.
- a tunnel for buffer transfer of MAGb 3 is created between MA Gb and MAGc, and in S 707, MAG b 3 starts transferring a packet addressed to MN 1 to MAG c 31.
- the Netlmm control means 7 of the MAGc 31 that has received the routing setup from the LMA 4 sends a routing setup Ack to the LMA 4 at S 708.
- Net setup control means of LMA 4 received routing setup Ack from MAGc 31 1 2 transmits a location registration system Ack including at least MN1's prefix information to MAGc 31 in S709.
- LMA 4 transmits location deregistration to MAGb 3.
- the Netlmm control means 12 of the LMA 4 sends a location deregistration system to the MAGb 3 in order to delete the LMA 4 -MAGb 3 tunnel with respect to the MAGb 3.
- This is usually sent for LMA4-MAGb3 tunnel deletion and usually includes MN-ID, LMA-ID, MAGb-ID.
- an identifier of MAGa2 an identifier of MAGa-ID, and control information of a tunnel deletion command with MAGa2 are added to the location notification in association with the identifier of MAGa2.
- the MAGb 3 that has received the above location deregistration process deletes the tunnel with the MAGa 2 as well as the tunnel elimination with the LMA 4.
- the Netlm control unit 7 of the MAGc 31 that has received the location registration process Ack from the LMA 4 creates address configuration information for the MN 1 such as prefix information, RA and the like at S 711 and transmits it to the MN 1.
- the MN 1 configures the address and sends a DAD to the MAGc 31 using NA for final confirmation.
- the Netlm control unit 7 of the MAGc 31 transmits an MN address setup including at least the MAGc ID, MN address, and MN ID of the MAGc 31 to the LMA 4.
- Netlmm control means 7 of MAGb 3 that received the location deregistration with added control information of deletion of the tunnel with MAGa 2 from LMA 4 receives the routing table in storage unit 8 at S714 from the routing table in storage unit 8 Delete the configuration and send a location deregistration ray Ack to LMA 4 to clear the tunneling configuration.
- This location deregistration system Ack contains the MAGa-ID of MAGa2, and is associated with information indicating MAG-MAG tunnel deletion.
- the Netlmm control means 12 of LMA 4 Upon receiving the location deregistration Ack from the MAGb 3, the Netlmm control means 12 of LMA 4 extracts the information of MAG-MAG tunnel deletion from the location deregistration system Ack, and the tunnel between MAGb 3 and MAGa 2 Recognized as deleted And delete the information on the tunnel of MAGb3 and MAGa2 from the communication information on MN1 of the database of the storage unit 13.
- the Netlmm control means 7 of the MAGb 3 notifies the tunnel deletion to the MAGa 2 and deletes the tunnel.
- Netlmm control means 7 of MAGb 3 transmits a notification instructing deletion of a tunnel to MAGa 2.
- This indication notification includes at least MAGb-ID and MN-ID, and it is described in the control information of the indication notification that it is a tunnel deletion (for packets addressed to MN1) in association with the MAGb-ID. Is desirable.
- the Netamm control means 7 of the MAGa2 deletes the tunnel setting between the MAGa2 and the MAGb3 from the routing table in the storage unit 8, and transmits a delete tunnel acknowledge Ack to the MAGb3.
- the Netlm control unit 12 of the LMA 4 that has received the MN address setup from the MAGc 31 accesses the database of the storage unit 13 and delivers the packet in the communication information related to the MN 1 Delete the data of MAGb 3, store the data of MAGc 31, send MN address setup Ack to MAGc 31 at S 717, and the Netlmm control means 12 of LMA 4 starts to transfer the packet to MAG c 31 at S 718.
- the Netlmm control means 7 of the MAGc 31 starts delivery of packets addressed to the MN 1 in S719.
- the tunnel with MAGa2 is also deleted in addition to the tunnel deletion with LMA4. And MAG resources can be effectively released.
- FIG. 15 is a sequence diagram showing the procedure of processing in this embodiment.
- a case where the tunnel between MAG and MAG is deleted triggered by normal termination of communication will be described by taking an example in which the MN1 moves from the link of MAGa2 to the link of MAGb3 and the communication is terminated there.
- the session that is the fifth layer of the OSI basic reference model The end of communication may be notified to the other party of communication using the Session Initiation Protocol (SIP), which is a protocol for call control in the communication layer, and the Real Time Streaming Protocol (RTSP), which is a protocol for controlling data delivery in real time.
- SIP Session Initiation Protocol
- RTSP Real Time Streaming Protocol
- the MN 1 transmits a SIP-Bye RTSP-TEARDOWN message to the communication partner for communication termination.
- MAGb3 Netlmm control means 7 refers to the routing table related to that MN-ID in storage unit 8 in S802, confirms the transfer status, and holds a tunnel between MAGb3-MAGa2. It detects that it does, and sends tunnel deletion indication notification to MAGa2 at S803.
- Netlmm control means 7 of MAGb 3 transmits a deletion notification of MAG-MAG tunnel to LMA 4.
- This tunnel deletion notification includes MAGa-ID, MAGb-ID and MN-ID, and is associated with information indicating MAG-MAG tunnel deletion.
- Netamm control means 7 of MAGa 2 receives the notification of the instruction to delete the tunnel from MAGb 3, deletes the tunnel setting between MAGa 2 and MAGb 3 from the routing table in storage unit 8 and sends MAGb 3 to MAGb 3. Send a Confirm Tunnel Delete Ack.
- a MAG-MAG tunnel deletion notification may be sent to the MAGa2 force SLMA4. The information as described above is described in the deletion notification.
- the procedure S for sending such a tunnel deletion notification to the LMA 4 can be omitted.
- information on MAG-MAG tunnel deletion as described above may be added to the location registration process transmitted from MAGb 2 to LMA 4.
- the MAG of the movement destination link that relays the communication end message transmitted from the MN is received, and this is used as a trigger when the movement destination MAG is the movement source link. It is possible to transmit to the MAG of! /, And delete the notification of the deletion of the tunnel setting so far, and the resource of the MAG can be effectively released.
- FIG. 16 is a sequence diagram showing the procedure of processing in this embodiment.
- MN1 moves from the link of MAGa2 to the link of MAGb3 and there is an abnormal termination of communication in the case where the tunnel between MAG and MAG is deleted triggered by abnormal termination of communication of MN1 is described. Do.
- the MN1 can not notify the MAG of the communication termination at the session layer! /, So the method as in the eighth embodiment is not Not available.
- Netlmm control means 7 of MAG uses means such as neighbor search (ND, Neighbor Discovery ,: FC2461), etc.
- Netlmm control means 7 of MAGb 3 grasps the identifier and MN-ID of the existing MN1 from the routing table in storage unit 8, and determines the transfer status regarding that MN1. To grasp. As a result, the Netlmm control means 7 of the MAGb 3 grasps that the transfer state by the MAGa 2 and tunneling is maintained, and notifies the MAGa 2 to delete the tunnel of the packet related to the MN 1 in S 903.
- Netlmm control means 7 of MAGb 3 transmits a deletion notification of MAG-MAG tunnel to LMA 4.
- This tunnel deletion notification includes MAGa-ID, MAGb-ID and MN-ID, and is associated with information indicating MAG-MAG tunnel deletion.
- the Netlmm control means 7 of the MAGa2 receives the notification of the instruction to delete the tunnel, and deletes the tunnel setting with the MAGb3 from the routing table of the storage unit 8. Return 3 to Ack.
- MAGa2 may send a MAG-MAG tunnel deletion notification to LMA4. The information as described above is described in this deletion notice.
- the procedure S for sending such a tunnel deletion notification to the LMA 4 can be omitted.
- the information on MAG-MAG tunnel deletion as described above may be added.
- FIG. 17 is a view showing a schematic configuration of a network in the present embodiment.
- FIG. 18 is a sequence diagram in the present embodiment.
- Proxy Mobile is used as a network-based IP mobility protocol.
- IP method When IP method is used, the method to hand over without packet loss and delete tunnel efficiently is described.
- the Proxy Mobile IP method is a method in which the MAG performs a proxy (proxy) function of the MN in Mobile IP using a AAA (Authentication Authorization Accounting, authentication, authorization, accounting) server that performs authentication and the like.
- AAA Authentication Authorization Accounting, authentication, authorization, accounting
- the MN 1 After moving, in S1001 of FIG. 18, the MN 1 transmits information for authentication to the MAG M31, which is the MAG of the new link, as usual.
- This information is considered to use EAP (Extensible Authentication Protocol) or the like.
- EAP Extensible Authentication Protocol
- the MAGc 31 Upon receiving the authentication request from the MN1, the MAGc 31 transmits authentication information to the AAA server 41 at S1002.
- This authentication information includes the MN-ID.
- the AAA server 41 that has received the authentication request from the MAGc 31 searches the database provided in the server using the MN-ID as a key, and determines whether or not to permit authentication.
- the MAGc 31 having received the authentication permission / policy profile creates a Proxy BU (Binding Update) at S 1004 based on the information obtained from the policy profile, and sends it to the LMA 4.
- Proxy BU Binding Update
- the LMA 4 Upon receiving the Proxy BU, the LMA 4 receives the buffer transfer 'tunnel deletion instruction notification including address information of the MAGc 31 at S1005, which is the MAG belonging to the MAG before moving.
- the MAGb 3 that received the buffer transfer 'tunnel deletion instruction notification receives the MAGc at S 1006.
- MAGc31 Upon receiving the tunnel creation instruction notification from MAGb3, MAGc31 receives MAb3 from MAb3.
- the MAGb 3 Upon receiving the tunnel creation, the MAGb 3 transfers the data addressed to the MN 1 accumulated in the dispatcher to the MAGc 31 in S1008. Also, at S 1009, MAGb 3 is L with LMA 4
- the LMA 4 that has received the Ack after sending Ack transmits Proxy BAc k (Binding Update Acknowledgment) to the MAG c 31 in S1010.
- Proxy BAc k Biting Update Acknowledgment
- a Gc31 tunnel is created.
- the MAGb 3 transmits a tunnel deletion instruction notification to the MAGa 2.
- MAGa 2 Upon receiving the tunnel deletion instruction notification from MAGb 3, MAGa 2 deletes the tunnel between MAGa 2 and MAGb 3 and, at S1012, transmits a tunnel deletion Ack to MAGb 3.
- MAGc 31 which receives Proxy BAck from LMA 4 receives RA and MN1 at MN101 at S1013. Send information for address configuration such as DHCP Advertise.
- the MN 1 having received the address configuration information from the MAGc 31 performs NA (DAD) in S1014.
- FIG. 19 is a view showing a schematic configuration of a network in the present embodiment.
- FIG. 20 is a sequence diagram in the present embodiment.
- MN1 moves from the link of MAGa2 to the link of MAGb3.
- MAGb3 sends to MAGa2 an indication notification of tunnel creation and buffer transfer.
- MAGa2 runs out of buffers, it sends an indication of tunnel deletion to MAGb3.
- MN 1 transmits information for authentication to MA Gb 3 which is a MAG of a new link as usual. It is conceivable to use EAP or the like as this information.
- This authentication request contains the MN 1 -ID, which is the identifier of the MN 1.
- the MAG b 3 Upon receiving the authentication request from the MN 1, the MAG b 3 transmits authentication information to the AAA server 41 at S 1102. This authentication information includes the MN-ID.
- the AAA server 41 that has received the authentication request from the MAGb 3 force, etc. searches the database using the MN-ID as a key, and determines whether or not to allow authentication. In the case of permitting the authentication, the home address information of MN 1 and the address information of LMA 4 in the database are included in S 110 3. Send information on MN1 as a policy profile to MAGb3.
- the MAGb 3 having received the authentication permission / policy profile creates a Proxy BU at S 110 4 based on the information obtained from the policy profile, and transmits it to the LMA 4.
- LMA4 which received Proxy BU from MAGb3, receives SI 105 with SI and MAGb3 as Proxy.
- This Proxy BAck contains address information of MAGa 2 which is the MAG before handover. This Proxy BAck creates a tunnel between LMA4 and MAGb3.
- the MAGb 3 Upon receiving the Proxy BAck from the LMA 4, the MAGb 3 creates a tunnel between the LMA 4 and the MAGb 3 and, at S 1106, forwarding of packets to the LMA 4 and so on to the MAGb 3 is started.
- the MAG b 3 further generates a Proxy FBU (Fast Binding Update) based on the information obtained from the Proxy BAck in S 1107 and transmits the Fast Binding Update to the MAG a 2.
- Proxy FBU Fest Binding Update
- MAGa2 Upon receiving the Proxy FBU from MAGb3, MAGa2 generates Proxy FBAc k at SI 108 and transmits it to MAGb3. As a result, since the tunnel between MAGa2 and MAGb3 is completed, in S1109, MAGa2 starts buffer transfer of a packet addressed to MN1.
- the packet addressed to MN1 that arrives at LMA4 will arrive at MAGb3, so the buffer for packets addressed to MN1 that MAGa2 holds will disappear when it is forwarded to MAGc31.
- the MAGa 2 transmits an indication to the MAGb 3 at S1110 to the effect that it should be excluded.
- MAGb3 Upon receiving the tunnel deletion instruction notification from MAGa2, MAGb3 deletes the tunnel from MAG a2 to MAGb3 at S1111, and transmits a tunnel deletion Ack to MAGa2. Also, by receiving the tunnel deletion instruction notification, MAGb 3 can determine that all packets to be transferred to MN 1 have been received. Therefore, at S1112, an RA for address configuration is sent to MN1.
- MAGa2 Upon receiving the tunnel deletion Ack from MAGb3, MAGa2 deletes the tunnel from MAGa2 to MAGb3.
- the MN 1 Upon receiving the MAGb 3 force, RA, the MN 1 receives NA (DAD) at S 1113 in order to check the address duplication. Note that this step may be omitted. [0235] After completing the address configuration of MN1, at SI 114, MAGb3 is M
- the MAG to which MN1 moves is LM
- the source MAG After creating a tunnel with A, it sends a notification of tunnel creation and buffer transfer indication to the source MAG, which enables handover without packet loss. Furthermore, since the source MAG transmits a tunnel deletion instruction notification to the destination MAG when the buffer is exhausted, it is possible to efficiently release the MAG resource.
- the communication system, control device, router, and communication method using the network-based IP mobility protocol of the present invention are not limited to the above illustrated example, and deviate from the scope of the present invention. Of course, various changes can be made within the range!
- the communication system, control device, router and communication method using the network-based IP mobility protocol according to the present invention are network-based IP mobility protocols that can be moved without the mobile terminal being equipped with a special protocol. It is possible to eliminate packet loss during handover and to effectively release router resources.
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- Data Exchanges In Wide-Area Networks (AREA)
Description
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Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
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KR1020117005726A KR101298080B1 (ko) | 2006-09-06 | 2007-08-31 | 네트워크 베이스 ip 모빌리티 프로토콜을 이용한 통신 시스템, 제어 장치, 루터 및 그의 통신 방법 |
JP2008533136A JP4950204B2 (ja) | 2006-09-06 | 2007-08-31 | ネットワークベースipモビリティプロトコルを利用した通信システム、制御装置、ルータ及びその通信方法 |
US12/440,181 US20110149839A1 (en) | 2006-09-06 | 2007-08-31 | Communication system using network base ip mobility protocol, control apparatus, router and communication method thereof |
EP20070806489 EP2068507B1 (en) | 2006-09-06 | 2007-08-31 | Communication system using network base ip mobility protocol, control device, router, and its communication method |
CN200780041289XA CN101536432B (zh) | 2006-09-06 | 2007-08-31 | 利用基于网络ip移动协议的通信系统、控制装置、路由器及其通信方法 |
KR1020097016152A KR101090189B1 (ko) | 2006-09-06 | 2007-08-31 | 네트워크 베이스 ip 모빌리티 프로토콜을 이용한 통신 시스템, 제어 장치, 루터 및 그의 통신 방법 |
US12/512,525 US8325677B2 (en) | 2006-09-06 | 2009-07-30 | Communication system using network base IP mobility protocol, control apparatus, router and communication method thereof |
US13/933,081 USRE45465E1 (en) | 2006-09-06 | 2013-07-01 | Communication system using network base IP mobility protocol, control apparatus, router and communication method thereof |
US14/630,355 US20150172960A1 (en) | 2006-09-06 | 2015-02-24 | Communication system using network base ip mobility protocol, control apparatus, router and communication method thereof |
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US12/512,525 Continuation US8325677B2 (en) | 2006-09-06 | 2009-07-30 | Communication system using network base IP mobility protocol, control apparatus, router and communication method thereof |
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EP (4) | EP2733972B1 (ja) |
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JP2011135243A (ja) * | 2009-12-24 | 2011-07-07 | Kddi Corp | Ipネットワークを介した移動端末のハンドオーバ方法、システム、アクセスゲートウェイ及びプログラム |
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JP5322325B2 (ja) * | 2010-06-09 | 2013-10-23 | パナソニック株式会社 | 無線基地局装置、ハンドオーバ制御システムおよびハンドオーバ制御方法 |
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