WO2006112081A1 - Systeme et procede de transfert de paquets, dispositif et programme constituant le systeme et support d’enregistrement - Google Patents

Systeme et procede de transfert de paquets, dispositif et programme constituant le systeme et support d’enregistrement Download PDF

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Publication number
WO2006112081A1
WO2006112081A1 PCT/JP2005/022433 JP2005022433W WO2006112081A1 WO 2006112081 A1 WO2006112081 A1 WO 2006112081A1 JP 2005022433 W JP2005022433 W JP 2005022433W WO 2006112081 A1 WO2006112081 A1 WO 2006112081A1
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WIPO (PCT)
Prior art keywords
address
packet
mobile terminal
server
destination address
Prior art date
Application number
PCT/JP2005/022433
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English (en)
Japanese (ja)
Inventor
Ippei Akiyoshi
Original Assignee
Nec Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nec Corporation filed Critical Nec Corporation
Priority to JP2007521075A priority Critical patent/JP4725751B2/ja
Publication of WO2006112081A1 publication Critical patent/WO2006112081A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • 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
    • H04W8/04—Registration at HLR or HSS [Home Subscriber Server]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]

Definitions

  • the present invention relates to a mobile communication network, an edge router device, a mobility management method used therefor, and a program therefor, and more particularly to a data communication method and a terminal mobility management method for a mobile terminal using IP (Internet Protocol).
  • IP Internet Protocol
  • MIPv6 Mobile IPv6
  • the mobile communication network shown in FIG. 1 includes home agents 51 and 52, and an edge router 5
  • Each of the mobile terminals 55 and 56 has home addresses (HoA: Home Address) “ ⁇ 1” and “HoA2” of the home networks 301 and 302 as IP addresses.
  • HoA Home Address
  • the home addresses “ ⁇ 1” and “HoA2” of each other are used. Data communication using the normal IP protocol is performed using Destination Address and Source Address as the destination address.
  • Each of the edge routers 53 and 54 advertises a prefix to its subordinate terminals, and the mobile terminals 55 and 56 generate the IP address of the terminal at the destination from the received prefix.
  • the IP address at this destination is called CoA (Care of Address).
  • the CoA under the edge router 53 of the mobile terminal 55 is CoAl
  • the CoA under the edge router 54 of the mobile terminal 56 is CoA2.
  • the home agents 51 and 52 provided in the home networks 301 and 302 manage the movement destinations of the mobile terminals.
  • the mobile terminals 55 and 56 generate CoA at the movement destinations, 302
  • the generated CoA is notified to the home agents 51 and 52, and the home agents 51 and 52 manage the notified CoA.
  • the mobile terminal 55 transmits data packets to the mobile terminal 56.
  • the mobile terminal 55 sends an IP packet whose source address (internal source address) is “ ⁇ 1” and whose destination address (internal destination address) is “HoA2” to the source address.
  • the packet Since the destination address is the IP address (HA1) of the home agent 51, the packet is delivered to the home agent 51.
  • the home agent 51 decapsulates the received packet and sends out an IP packet with the source address “ ⁇ 1” and the destination address “HoA2” as shown in FIG. 2 (b).
  • the home agent 52 currently manages that the mobile terminal 56 manages the address of "CoA2", manages that the received packet is at the address of "CoA2", and receives the received packet.
  • the destination address (external destination address) is “CoA 2”
  • the source address (external source address) is encapsulated with “HA2”, which is the IP address of the home agent 52.
  • HA2 the IP address of the home agent 52.
  • This packet has a destination address of "CoA2” Therefore, it is currently delivered to the mobile terminal 56 that is under the edge router 54 and has “CoA2” as the IP address at the destination.
  • IMS IP Multimedia Subsystem
  • 3GPP 3rd Generation
  • IP and SIP Session Initiation Protocol
  • the mobile terminal performs a session via a P—CSCF (Proxy- Call Session Control Function) server, which is a session control server in the visited network. Control is performed and communication is started.
  • P—CSCF Proxy- Call Session Control Function
  • FIG. 3 is a diagram showing a communication operation for receiving the IMS service.
  • the home network 10 of the mobile terminal 30 is provided with an S-CSCF (Serving-Call Session Control Function) server 70 and a home agent 50, and the visited network 20 where the mobile terminal is currently located is provided.
  • S-CSCF Server-Call Session Control Function
  • An edge router 40 and a P—CSCF Sano 60 are provided.
  • the home agent 50 manages the CoA of the mobile terminal 30 in the visited network 20.
  • S—CSCF70 is a SIP server that provides various multimedia services in cooperation with HSS (Home Subscriber Server) 80 that manages user authentication and subscriber data.
  • the edge router 40 is responsible for data transmission between the subordinate mobile terminal 30 and the home agent 50.
  • P—CSCF server 60 is the SIP server that mobile terminal 30 accesses first, and the SIP message transmitted from mobile terminal 30 is sent to the home network. Transfer to S—CSCF70 at
  • the procedure for registration with IMS will be described.
  • the broken line arrow indicates the upward direction of the force from the mobile terminal 30 to the HSS 80
  • the solid line arrow indicates the downward direction of the force from the HSS 80 to the mobile terminal 30.
  • the P—CSCF server 60 When the P—CSCF server 60 receives the Register message, it registers the subscriber information and home address of the mobile terminal 30, reconstructs the Register message, and sends it to the S—CSCF 70.
  • S-CSCF 70 confirms the validity of the subscriber information contained in the Register message via HS S80, it registers the information of mobile terminal 30 and the address of P—CSCF server 60, and sends an OK message to P—CSCF.
  • P CSCF server 60 transfers to mobile terminal 30. The destination at this time is the home address of the mobile terminal 30 included in the Register message. For this reason, a packet is delivered from the P—CSCF server 60 to the mobile terminal 40 via the home agent 50 and the edge router 40 placed on the home network 10.
  • the P—CSCF server is configured to manage the home address of the mobile terminal, communication from the P—CSCF Sano to the mobile terminal is performed in the downward direction. In some cases, there is a problem that the communication route becomes redundant and the delay time becomes long because it always passes through a home agent placed in the home network.
  • the present invention has been made in view of the problems of the conventional technology as described above, and is intended to realize a packet transfer system and method capable of shortening a communication path and shortening a delay time. Objective.
  • the packet transfer system of the present invention transfers a packet transmitted from a mobile terminal to a server.
  • An edge router and a front-end processing device that exist between communication paths between the mobile terminal and the server,
  • the edge router includes a capsule address list in which an address of the server is described as an internal destination address, and an address of the front-end processing device corresponding to the address of the server is described as an external destination address.
  • the capsule address list is referred to, the address of the front-end processing device described corresponding to the server address is set as the external destination address,
  • the address is encapsulated as an external source address and transferred to the front-end processing unit.
  • the front-end processing device When the front-end processing device receives the encapsulated packet addressed to itself, the front-end processing device removes the capsule and transfers the packet based on the internal source address and the internal destination address to the internal destination address, as well as the internal source address and the external source.
  • a binding list in which addresses are associated is generated, and when a packet whose destination address is the address of the mobile terminal is received, the binding list is referred to and described as an external destination address corresponding to the address of the mobile terminal.
  • the edge router address as an external destination address and the external source address as its own address are encapsulated and transferred to the edge router.
  • the edge router of the present invention comprises a packet transfer system that forwards and returns a packet transmitted to and from a mobile terminal, together with a front-end processing device that exists between communication paths between the mobile terminal and the server.
  • An information storage for storing a memory address list and its own address in which the address of the server is described as an internal destination address and the address of the front-end processing device corresponding to the address of the server is described as an external destination address And
  • An encapsulation processor that performs packet encapsulation
  • a decapsulation processing unit for decapsulating the packet When the mobile terminal power accepts a packet transmitted to the server, the address of the front-end processing device described with reference to the address of the server is referred to the external destination address with reference to the address list of the server.
  • the capsule processing is performed by the capsule processing unit using the self address as the external transmission source address and transferred to the front end processing unit, and the capsule packet addressed to itself is received, the decapsulation processing unit And a determination control unit that performs decapsulation and transfers a packet based on the internal source address and the internal destination address to the internal destination address.
  • the front-end processing device of the present invention includes a packet transfer system that transfers a packet transmitted from a mobile terminal to a server and returns the packet together with an edge router that exists between communication paths between the mobile terminal and the server.
  • An information storage unit that stores a nodding list in which an internal source address and an external source address are associated with each other and a self-address,
  • An encapsulation processor that performs packet encapsulation
  • a decapsulation processing unit for decapsulating the packet for decapsulating the packet
  • the decapsulation processing unit Upon receiving the encapsulated packet addressed to itself, the decapsulation processing unit performs decapsulation processing to remove force encapsulation, and forwards the packet with the internal source address and the internal destination address to the internal destination address.
  • An internal source address and an external source address are registered in association with the nodding list, and when a packet whose destination address is the address of the mobile terminal is received, the binding list is referred to and the address of the mobile terminal is The edge router address described as an external destination address is used as the external destination address, and the process of encapsulating the external source address as its own address is performed by the capsule processor and transferred to the edge router.
  • a judgment control unit To.
  • a packet transfer system is a packet transfer system that transfers a packet transmitted by a mobile terminal to a server and sends it back, between the communication path between the mobile terminal and the server.
  • An edge router that exists, and the edge router is a power in which the address of the server is described as an internal destination address.
  • a packet address list and when a packet transmitted from the mobile terminal to the server is received, the capsule address list is referred to, the server address is set as an external destination address, and the self address is set as an external source.
  • the server When the server receives the encapsulated packet addressed to itself, it removes the capsule and forwards the packet with the internal source address and the internal destination address to the internal destination address, and at the same time, compares the internal source address and the external source address.
  • An associated binding list is generated, and when the packet whose destination address is the address of the mobile terminal is transmitted, the binding list is referred to and described as an external destination address corresponding to the address of the mobile terminal.
  • the edge router address as an external destination address and the external source address as its own address are encapsulated and transferred to the edge router.
  • An edge router is an edge router that exists between communication paths between the mobile terminal and the server constituting a packet transfer system for transferring a packet transmitted by a mobile terminal to a server.
  • An information storage unit for storing a capsule address list in which the address of the server is described as an internal destination address and its own address;
  • An encapsulation processor that performs packet encapsulation
  • a decapsulation processing unit for decapsulating the packet for decapsulating the packet
  • the mobile terminal power Upon receiving a packet transmitted to the server, the mobile terminal power refers to the cab cell address list, encapsulates the server address as an external destination address and its own address as an external source address.
  • the decapsulating processing unit performs decapsulation, and the packet based on the internal source address and the internal destination address is received. And a judgment control unit for forwarding to the internal destination address.
  • the server of the present invention is a server that receives a packet transmitted by the mobile terminal through an edge router,
  • An information storage unit that stores a binding list in which an internal source address and an external source address are associated with each other, and an own address;
  • An encapsulation processor that performs packet encapsulation
  • a decapsulation processing unit for decapsulating the packet for decapsulating the packet
  • the decapsulation processing unit Upon receiving the encapsulated packet addressed to itself, the decapsulation processing unit performs decapsulation processing to remove force encapsulation, and forwards the packet with the internal source address and the internal destination address to the internal destination address.
  • An internal source address and an external source address are registered in association with the nodding list, and the address of the mobile terminal is referred to when the packet whose destination address is the address of the mobile terminal is transmitted.
  • the edge router address is described as an external destination address, and the capsule processor is configured to perform the process of encapsulating the external source address as its own address. And a judgment control unit for transferring to the data.
  • a packet transfer system is a packet transfer system for transferring a packet transmitted by a mobile terminal to a server and returning the packet.
  • the edge router includes a capsule address list in which an address of the server is described as an internal destination address, and an address of the front end processing device corresponding to the address of the server is described as an external destination address.
  • the terminal manages RCoA, which is a CoA created in the subnet held by the MAP, and LCoA, which is a CoA created in the subnet held by the edge router, corresponding to the home address, and
  • the capsule terminal address list is referred to, the address of the front-end processing device described in correspondence with the address of the server is set as an external destination address, and the mobile terminal RCoA is encapsulated as an external source address and To front-end processing equipment Forward, receive the encapsulated packet destined for RCoA or LCoA, unencapsulate, send packet with internal source address and internal destination address to internal destination address 3 ⁇ 45,
  • the front-end processing device When the front-end processing device receives the encapsulated packet addressed to itself, the front-end processing device removes the capsule and transfers the packet based on the internal source address and the internal destination address to the internal destination address, as well as the internal source address and the external source.
  • a binding list in which addresses are associated is generated, and when a packet whose destination address is the address of the mobile terminal is received, the binding list is referred to and described as an external destination address corresponding to the address of the mobile terminal.
  • Encapsulating the RCoA of the mobile terminal as an external destination address and the external source address as its own address, and transferring to the MAP.
  • the MAP manages the RCoA and LCoA of the mobile terminal in association with each other.
  • the LCoA corresponding to the RCoA that is the destination address of the received packet is set as the external destination address, and its own address Is transferred to the edge router as a packet encapsulated as an external source address.
  • An edge router provides a front-end processing device in which a packet transfer system for transferring a packet transmitted from a mobile terminal to a server and returning the packet is present between communication paths between the mobile terminal and the server. And an edge router configured with MAP,
  • the server address is described as an internal destination address
  • the address of the front end processing device corresponding to the server address is described as an external destination address
  • the mobile terminal address list is described.
  • RCoA which is a CoA created in a subnet held by the MAP
  • LCoA which is a CoA created in a subnet held by the edge router, corresponding to a home address
  • An encapsulation processor that performs packet encapsulation
  • a decapsulation processing unit for decapsulating the packet for decapsulating the packet
  • the mobile terminal power receives a packet transmitted to the server, Referring to the cell address list and the binding cache, the address of the front-end processing device described corresponding to the address of the server is set as the external destination address, and the RCoA of the mobile terminal is encapsulated as the external source address Processing is performed by the encapsulation processing unit and transferred to the front-end processing unit.
  • decapsulation processing is performed to remove the capsule from the decapsulation processing unit.
  • a determination control unit that forwards a packet with an internal source address and an internal destination address to the internal destination address.
  • a front-end processing device transfers a packet transmitted from a mobile terminal to a server, and returns a packet transfer system between communication paths between the mobile terminal and the server.
  • a front-end processing device configured with existing edge routers and MAPs,
  • An information storage unit that stores a binding list in which an internal source address and an external source address are associated with each other, and an own address;
  • An encapsulation processor that performs packet encapsulation
  • a decapsulation processing unit for decapsulating the packet for decapsulating the packet
  • the decapsulation processing unit Upon receiving the encapsulated packet addressed to itself, the decapsulation processing unit performs decapsulation processing to remove force encapsulation, and forwards the packet with the internal source address and the internal destination address to the internal destination address.
  • An internal source address and an external source address are registered in association with the nodding list, and when a packet whose destination address is the address of the mobile terminal is received, the binding list is referred to and the address of the mobile terminal is Described as an external destination address, the RCoA of the mobile terminal is set as the external destination address, and the process of encapsulating the external source address as its own address is performed by the encapsulation processing unit and transferred to the MAP. And a judgment control unit.
  • the MAP of the present invention transfers a packet, which has also been transmitted by the mobile terminal, to the server, and sends back a packet transfer system that exists between the communication path between the mobile terminal and the server.
  • MAP configured with An information storage unit that stores a binding cache that manages RCoA and LCoA of the mobile terminal in association with each other, and an own address;
  • An encapsulation processor that performs packet encapsulation
  • the LCoA corresponding to the RCoA that is the destination address of the received packet is set as the external destination address, and the own address is encapsulated as the external source address And a determination control unit that causes the encapsulation processing unit to perform transfer to the edge router.
  • a packet transfer system is a packet transfer system for transferring a packet transmitted by a mobile terminal to a server and returning the packet.
  • the edge router has a force address list in which the address of the server is described as an internal destination address, and the RCoA that is a CoA created by the subnet held by the MAP for the mobile terminal.
  • the LCoA which is a CoA created in the subnet held by the edge router, is managed in correspondence with the home address, and when the packet transmitted from the mobile terminal to the server is received, the capsule address list is updated.
  • the address of the server is set as the external destination address
  • the RCoA of the mobile terminal is encapsulated as the external source address, transferred to the server, and the encapsulated packet addressed to RCoA or LCoA is received. Remove the trap and forward the packet with the internal source address and internal destination address to the internal destination address
  • LCoA which is a CoA created in the subnet held by the edge router
  • the server When the server receives the encapsulated packet addressed to itself, it removes the capsule and forwards the packet with the internal source address and the internal destination address to the internal destination address, and at the same time, compares the internal source address and the external source address.
  • An associated binding list is generated, and when the packet whose destination address is the address of the mobile terminal is transmitted, the binding list is referred to and described as an external destination address corresponding to the address of the mobile terminal.
  • the MAP manages the RCoA and LCoA of the mobile terminal in association with each other.
  • the LCoA corresponding to the RCoA that is the destination address of the received packet is set as the external destination address, and its own address Is transferred to the edge router as a packet encapsulated as an external source address.
  • An edge router is an edge router that exists between communication paths between the mobile terminal and the server that constitute a packet forwarding system that forwards packets transmitted by the mobile terminal to the server. Because
  • a capsule address list in which the address of the server is described as an internal destination address, an RCoA that is a CoA created by the mobile terminal in the subnet held by the MAP, and a subnet held by the edge router A binding cache that manages LCoA, which is a created CoA, corresponding to a home address, an information storage unit that stores its own address,
  • An encapsulation processor that performs packet encapsulation
  • a decapsulation processing unit for decapsulating the packet for decapsulating the packet
  • the mobile terminal power Upon receiving a packet transmitted to the server, the mobile terminal power refers to the capsule address list and the binding cache, uses the server address as an external destination address, and uses the mobile terminal RCoA as an external source address.
  • Encapsulation processing is performed by the encapsulation processing unit and transferred to the server.
  • the decapsulation processing unit When a capsuled packet addressed to RCoA or LCoA is received, the decapsulation processing unit performs decapsulation processing, and the internal transmission source And a determination control unit that transfers a packet based on the address and the internal destination address to the internal destination address.
  • a server is a server for receiving a packet transmitted by a mobile terminal via an edge router
  • An information storage unit that stores a binding list in which an internal source address and an external source address are associated with each other, and an own address;
  • An encapsulation processor that performs packet encapsulation
  • a decapsulation processing unit for decapsulating the packet for decapsulating the packet
  • the decapsulation processing unit receives the decapsulated packet. Encapsulation processing is performed to forward packets with the internal source address and internal destination address to the internal destination address, and the internal source address and external source address are registered in the binding list in association with each other.
  • the binding list is referred to, the RCoA of the mobile terminal described as the external destination address corresponding to the address of the mobile terminal is set as the external destination address, and the external destination address is set.
  • a determination control unit that causes the encapsulation processing unit to perform a process of encapsulating a transmission source address as its own address and transferring it to the MAP.
  • a packet transfer system is a packet transfer system that transfers a packet transmitted from a mobile terminal to a server and returns the packet.
  • a front-end processing device existing between communication paths between the mobile terminal and the server,
  • the mobile terminal includes a capsule address list in which an address of the server is described as an internal destination address, and an address of the front-end processing device corresponding to the address of the server is described as an external destination address.
  • the address of the front-end processing device described corresponding to the address of the server is set as the external destination address, and its own CoA is set as the external source address. And then forwards it to the front-end processing unit.
  • the encapsulation is removed.
  • the front-end processing device When the front-end processing device receives the encapsulated packet addressed to itself, the front-end processing device removes the capsule and transfers the packet based on the internal source address and the internal destination address to the internal destination address, as well as the internal source address and the external source.
  • a binding list in which addresses are associated is generated, and when a packet whose destination address is the address of the mobile terminal is received, the binding list is referred to and described as an external destination address corresponding to the address of the mobile terminal.
  • the CoA of the mobile terminal is used as an external destination address, and the external source address is encapsulated as its own address and transferred to the mobile terminal.
  • the mobile terminal of the present invention sends a packet transmission to a server and a reply from the server.
  • An information storage that stores a power address list in which the address of the server is described as an internal destination address, and the address of the front-end processing device corresponding to the address of the server is described as an external destination address and its own CoA And
  • An encapsulation processor that performs packet encapsulation
  • a decapsulation processing unit for decapsulating the packet for decapsulating the packet
  • the capsule address list When transmitting to the server, the capsule address list is referred to, the address of the front-end processing device described corresponding to the server address is set as the external destination address, and its own CoA is set. Processing to encapsulate as an external source address is performed by the capsule processing unit and transferred to the front-end processing unit. When a capsuled packet addressed to its own CoA is received, it is encapsulated in the decapsulation processing unit. And a determination control unit that performs decapsulation processing to remove the decapsulation.
  • a packet transfer system is a packet transfer system for transferring a packet transmitted from a mobile terminal to a server and returning the packet.
  • the mobile terminal includes a capsule address list in which an address of the server is described as an internal destination address, and an address of the front-end processing device corresponding to the server address is described as an external destination address.
  • RCoA which is a CoA created in the subnet held by the MAP
  • LCoA which is a CoA created in the subnet in which the service is located
  • the front-end processing device forwards to the front-end processing unit and encapsulate for RCoA or LCoA Remove the Kapuserui spoon was when received to signal the packet,
  • the front-end processing device removes the capsule and transfers the packet based on the internal source address and the internal destination address to the internal destination address, as well as the internal source address and the external source.
  • a binding list in which addresses are associated is generated, and when a packet whose destination address is the address of the mobile terminal is received, the binding list is referred to and described as an external destination address corresponding to the address of the mobile terminal.
  • Encapsulating the RCoA of the mobile terminal as an external destination address and the external source address as its own address, and transferring to the MAP.
  • the MAP manages the RCoA and LCoA of the mobile terminal in association with each other.
  • the LCoA corresponding to the RCoA that is the destination address of the received packet is set as the external destination address, and its own address Is transferred to the edge router as a packet encapsulated as an external source address.
  • a mobile terminal is a mobile terminal that performs packet transmission to a server and a reply from the server via a front-end processing device and a MAP that exist between communication paths with the server.
  • the address of the server is described as an internal destination address and the address of the front-end processing device corresponding to the address of the server is described as an external destination address, and the subnet held by the MAP about itself
  • An information storage unit that stores a binding cache that manages RCoA, which is a CoA created in, and an LCoA, which is a CoA created in the subnet in which it is located, corresponding to the home address, and encapsulation that performs packet encapsulation A processing unit;
  • a decapsulation processing unit for decapsulating the packet for decapsulating the packet
  • the address of the front-end processing device described corresponding to the server address is set as the external destination address, and the mobile terminal Processing to encapsulate RCoA as an external source address is performed by the encapsulation processing unit, forwarded to the front-end processing device, and receives the encapsulated packet addressed to RCoA or LCoA.
  • Decision control unit that causes the capsule to perform decapsulation processing It is characterized by having.
  • a packet transfer system is a packet transfer system for transferring a packet transmitted from a mobile terminal to a server and returning the packet.
  • the edge router includes a capsule address list in which an address of the server is described as an internal destination address, and an address of the MAP corresponding to the address of the server is described as an external destination address.
  • the RCoA which is a CoA created in the subnet held by the network
  • the LCoA which is a CoA created in the subnet held by the edge router
  • the encapsulated address list is referred to and described in correspondence with the address of the server!
  • the MAP address is used as the external destination address, and the RCoA of the mobile terminal is externally transmitted.
  • Encapsulated as the original address and forwarded to the MAP, encapsulated for RCoA or LCoA Remove the Kapuserui spoon when receiving the packet, forwards the packet by the internal source address and the internal destination address to an internal destination address,
  • the MAP When the MAP manages the RCoA and LCoA of the mobile terminal in correspondence with each other and receives a force-packeted packet addressed to itself, the MAP removes the capsule and internally transmits the packet based on the internal source address and the internal destination address.
  • a forwarding list is generated and a nodding list in which an internal source address is associated with an external source address is generated.
  • the binding list When a packet whose destination address is the address of the mobile terminal is received, the binding list is referred to. It is described as an external destination address corresponding to the address of the mobile terminal, and is transferred as a packet encapsulated with the RCoA of the mobile terminal as an external destination address and its own address as an external source address.
  • the RCoA When an RCoA packet is received, the RCoA that is the destination address of the received packet The response to LCoA and external destination address, characterized by transferring the Kapuserui spoon packet its own address as the external source address to the edge router.
  • An edge router can transmit a packet transmitted by a mobile terminal.
  • the address of the server is described as an internal destination address, the capsule address list in which the address of the MAP corresponding to the address of the server is described as an external destination address, and the MAP holds by the mobile terminal Encapsulates information packets that store the RCoA, which is a CoA created in the subnet, and the nodding cache that manages the LCoA, which is a CoA created in the subnet held by the edge router, corresponding to the home address An encapsulation processor;
  • a decapsulation processing unit for decapsulating the packet for decapsulating the packet
  • the mobile terminal power is described in correspondence with the address of the server by referring to the capsule address list upon receiving a packet transmitted to the server.
  • the MAP address is used as an external destination address and the RCoA of the mobile terminal is encapsulated as an external source address.
  • the capsule processing unit performs the process of encapsulating the address and transferring it to the MAP.
  • a decision control unit that causes the decapsulation processing unit to perform decapsulation processing to remove the capsule when the received packet is received and forwards the packet based on the internal source address and the internal destination address to the internal destination address.
  • the MAP configures a packet transfer system that forwards a packet transmitted by the mobile terminal to the server and returns the packet together with an edge router that exists between the communication path between the mobile terminal and the server.
  • a binding cache that manages the RCoA and LCoA of the mobile terminal in association with each other, a nodding list in which an internal source address and an external source address are associated, and an information storage unit that stores its own address;
  • An encapsulation processor that performs packet encapsulation
  • a decapsulation processing unit for decapsulating the packet for decapsulating the packet
  • the decapsulation processing unit When the encapsulated packet addressed to itself is received, the decapsulation processing unit performs decapsulation processing to remove the power and cancels the internal source address and the internal destination address.
  • the packet with the address is transferred to the internal destination address, the internal source address and the external source address are registered in the binding list, and the packet is referenced when the destination address is the address of the mobile terminal.
  • the capsule processor processing unit encapsulates the mobile terminal R CoA described as the external destination address corresponding to the mobile terminal address as the external destination address and the own address as the external source address.
  • the LCoA corresponding to the RCoA that is the destination address of the received packet is set as the external destination address, and the own address is encapsulated as the external source address.
  • the encapsulation processing unit perform the And a decision control unit for forwarding to the router.
  • a packet transfer system is a packet transfer system configured by a mobile terminal and a MAP
  • the mobile terminal is provided with a force address list in which the address of the server is described as an internal destination address, and the address of the MAP corresponding to the address of the server is described as an external destination address.
  • RCoA which is a CoA created in the subnet to be held
  • L CoA which is a CoA created in the subnet in which it is located
  • the capsule address list the address of the MAP described in correspondence with the address of the server is set as an external destination address
  • the RCoA of the mobile terminal is encapsulated as an external source address to map the MAP. Transfer to the RCoA and receive the encapsulated packet addressed to the RCoA or LCoA.
  • the MAP When the MAP manages the RCoA and LCoA of the mobile terminal in correspondence with each other and receives a force-packeted packet addressed to itself, the MAP removes the capsule and internally transmits the packet based on the internal source address and the internal destination address. A forwarding list is generated and a nodding list in which an internal source address is associated with an external source address is generated. When a packet whose destination address is the address of the mobile terminal is received, the binding list is referred to.
  • the RCoA of the mobile terminal is the external destination address
  • its own address is the external source address
  • the LCoA corresponding to the RCoA that is the destination address of the received packet is set as the external destination address
  • its own address is set as the external source address.
  • the packet is forwarded as a packet to the edge router.
  • a mobile terminal is a mobile terminal that performs packet transmission to a server and a reply from the server via a MAP that exists between communication paths with the server.
  • the address of the server is described as an internal destination address
  • the MAP address corresponding to the address of the server is created as a capsule address list in which the address of the server is described as an external destination address, and a subnet held by the MAP about itself
  • An information storage unit that stores a binding cache that manages RCo A that is a CoA and an LCoA that is a CoA created in a subnet in which the CoA is located, corresponding to a home address;
  • An encapsulation processor that performs packet encapsulation
  • a decapsulation processing unit for decapsulating the packet for decapsulating the packet
  • the capsule address list is referred to, the MAP address described corresponding to the server address is set as the external destination address, and the RCoA of the mobile terminal is set.
  • Decapsulation that decapsulates to the decapsulation processing unit when the encapsulation processing unit performs the process of encapsulating as an external source address forwards it to the MAP, and receives the encapsulated packet addressed to RCoA or LCoA And a judgment control unit for performing the digitization process.
  • a program according to the present invention is a program for realizing each of the above-described components by a computer system, and a recording medium according to the present invention stores the above-described program.
  • the registered server is encapsulated and transferred.
  • the ability to release this capsule before processing by the server is performed.
  • a binding list that associates the internal source address with the external source address is generated, and the reply from the server passes through the home agent. Without being sent to the external source registered in the binding list.
  • FIG. 1 is a diagram showing a configuration of a mobile communication network based on Mobile IPv6.
  • FIG. 2 Each of (a) to (c) is a diagram showing a configuration of an IP packet.
  • FIG. 3 is a diagram showing a communication operation for receiving an IMS service.
  • FIG. 4 is a block diagram showing a configuration of a first exemplary embodiment of a packet transfer system configured according to the present invention.
  • FIG. 5 is a diagram showing a configuration of the edge router 140 in FIG.
  • FIG. 6 is a diagram showing registration contents of an encapsulated address list 401 in FIG.
  • FIG. 7 is a flowchart showing the operation of the edge router 140 in FIG.
  • FIG. 8 is a diagram showing the configuration of the front end processing device 190 in FIG.
  • FIG. 9 is a diagram showing registered contents of the binding list in FIG. 8.
  • FIG. 10 is a flowchart showing an operation of the front end processing device 190 in FIG.
  • FIG. 11 is a diagram showing the operation of the first exemplary embodiment together with header information.
  • FIG. 12 is a block diagram showing a configuration of a second exemplary embodiment of a packet transfer system configured according to the present invention.
  • FIG. 13 is a diagram showing a configuration of the edge router 240 in FIG.
  • FIG. 14 is a flowchart showing the operation of the edge router 240 in FIG.
  • FIG. 15 is a flowchart showing the operation of the front-end processing device 290 in FIG.
  • FIG. 16 is a diagram showing the operation of the second exemplary embodiment together with header information.
  • FIG. 17 is a block diagram showing a configuration of a third exemplary embodiment of a packet transfer system configured according to the present invention.
  • FIG. 18 is a block diagram showing a configuration of a P-CSCF server 1160 in FIG.
  • FIG. 19 is a diagram showing the operation of the third exemplary embodiment together with header information.
  • FIG. 20 is a block diagram showing the configuration of the fourth embodiment of the packet transfer system according to the present invention.
  • FIG. 20 is a block diagram showing the configuration of the fourth embodiment of the packet transfer system according to the present invention.
  • FIG. 21 is a diagram showing the operation of the fourth exemplary embodiment together with header information.
  • FIG. 22 is a block diagram showing the configuration of the fifth example of the packet transfer system configured according to the present invention.
  • FIG. 23 is a block diagram showing a configuration of mobile terminal 1130 in FIG.
  • FIG. 24 is a diagram showing the operation of the fifth exemplary embodiment together with header information.
  • FIG. 25 is a block diagram showing a configuration of a sixth example of the packet transfer system configured according to the present invention.
  • FIG. 26 is a block diagram showing a configuration of mobile terminal 1230 in FIG. 25.
  • FIG. 27 is a diagram showing the operation of the sixth exemplary embodiment together with header information.
  • FIG. 28 is a block diagram showing a configuration of a seventh embodiment of the packet transfer system configured according to the present invention.
  • FIG. 29 is a block diagram showing a configuration of MAP 1200 in FIG.
  • FIG. 30 is a diagram showing the operation of the seventh exemplary embodiment together with header information.
  • FIG. 31 is a block diagram showing a configuration of an eighth embodiment of a packet transfer system configured according to the present invention.
  • FIG. 32 is a diagram showing the operation of the eighth exemplary embodiment together with header information.
  • FIG. 4 is a block diagram showing the configuration of the first embodiment of the packet transfer system constructed according to the present invention.
  • the home network 110, the visited network 120, the mobile terminal 130, the home agent 150, the P-CSCF160, the S—CSCF170, and the HSS180 are the home network 10, the visited network 20, and the mobile terminal 30 shown in FIG. , Home Agent 50, P—CSCF60, S—CSCF70, HSS80.
  • an edge router (ER) 140 and a front end processing device (FE) 190 are provided in addition to these components.
  • the visited network 20 is an integrated network of multiple edge routers, and only one mobile terminal 130, edge router 140, P-CSCF160, and front-end processing device 190 are shown in FIG. However, there are actually a plurality of them.
  • the edge router 140 in this embodiment includes an encapsulated address list in which the address of the front-end processing device 190 is registered in association with the address of the P-CSCF 160, and is registered in the encapsulated address list.
  • the packet addressed to the address of P-CSCF160 has a function of encapsulating the destination address as the address of the associated front-end processing device 190 and encapsulating the transmission source address as its own address.
  • FIG. 5 is a diagram showing a main configuration of the edge router 140 in FIG.
  • the edge router 140 includes an information storage unit 400 that stores an encapsulated address list 401 and an ER address 4002, which is its own address, a determination control unit 403, an interface unit 404, and an encapsulation process.
  • a unit 405, a decapsulation processing unit 406, a routing processing unit 407, and a force are included.
  • the determination control unit 403 refers to the contents stored in the information storage unit 400 for the packet transmitted / received via the interface unit 404, and controls the processing content performed by each unit according to the result.
  • the encapsulation processing unit 405 and the decapsulation processing unit 406 perform the capsule processing and the decapsulation processing according to the control of the judgment control unit 403, respectively. Processing unit 40 7 and the interface unit 404.
  • FIG. 6 is a diagram showing the registered contents of the encapsulated address list 401. Actually, the power to register the specific addresses of P-CSCF160 and front-end processor 190 In order to facilitate understanding, the names of P-CSCF160 and front-end processor 190 are changed to their respective addresses. Show. As shown in Figure 6, P-CSCF160 ⁇ 1
  • the addresses of the front-end processing devices 190 to 190 are registered at 60 addresses.
  • FIG. 7 is a flowchart showing the operation of the edge router 140.
  • the judgment control unit 403 When receiving the packet (step S601), the judgment control unit 403 refers to the ER address 402 and confirms whether the destination address is its own address (step S602). If the packet is addressed to itself, it is decapsulated (step S603), transferred to the internal destination address (step S604), and the process ends. If it is confirmed in step S602 that the destination address is not its own address, the encapsulated address list 401 shown in FIG. 6 is searched (step S605), and the destination address is registered in the encapsulated address list 401. It is confirmed whether it is done (step S606).
  • Step S607 If the destination address is registered in the encapsulated address list 401, the address of the corresponding front-end processing device 190 registered as the external destination address is encapsulated as its own address as the external source address. (Step S607), transfer to the external destination address (Step S608), and end. If it is confirmed in step S606 that the destination address is registered in the encapsulated address list 401 !, NA! /, It is transferred to the destination address (step S609), and the process ends.
  • FIG. 8 is a diagram showing a main configuration of the front end processing device 190 in FIG.
  • the front-end processing device 190 includes an information storage unit 500 that stores a binding list 501 and an FE address 502 that is its own address, a list registration processing unit 503, a determination control unit 504, An interface unit 505, an encapsulation processing unit 506, a decapsulation processing unit 507, and a routing processing unit 508 are included.
  • the determination control unit 504 refers to the contents stored in the information storage unit 500 for the packets transmitted / received via the interface unit 505, and controls the processing contents performed by each of the above units according to the result.
  • the list registration processing unit 503 performs registration processing in the information storage unit 500 according to the control of the judgment control unit 504, and the encapsulation processing unit 506 and the decapsulation unit
  • the processing unit 507 performs capsule processing and decapsulation processing according to the control of the judgment control unit 504! /, And sends the processed packets to the outside, such as the routing processing unit 508 and the interface unit. Via 505.
  • the judgment control unit 504 When receiving a packet whose destination address is the address of the front-end processing device 190 and whose source address is encapsulated by the address of the edge router 140, the judgment control unit 504 receives the internal source address and the external source address. A noindin list 501 associated with is generated. FIG. 9 shows the registration contents of the binding list. Actually, the power to register the specific addresses of the mobile terminal 130 and the edge router 140 Here, in order to facilitate understanding, the names of the mobile terminal 130 and the edge router 140 are changed to the respective addresses. . As shown in Figure 9, the addresses of mobile terminals 130-130
  • 1 2 contains the addresses of edge routers 140-140.
  • FIG. 10 is a flowchart showing the operation of the front end processing device 190.
  • the judgment control unit 504 When receiving the packet (step S501), the judgment control unit 504 refers to the FE address 502 and confirms whether the destination address is its own address (step S502). If the packet is addressed to itself, it is decapsulated (step S503), and a binding list 501 in which the internal source address and external source address shown in FIG. 9 are associated with each other is generated (step S504). The destination address is transferred as the destination address (step S505), and the process ends. If it is confirmed in step S502 that the destination address is not its own address, the binding list 501 shown in FIG. 9 is searched to check whether the destination address is registered as the internal source address (step S502). S507).
  • Step S508 If the destination address is registered as a source address in the binding list 501, the corresponding external source address is encapsulated as the external destination address, and its own address is encapsulated as the external source address (step S508) and transferred. (Step S509) is completed. If it is confirmed that the destination address is registered as an internal source address in the binding list 501 in step S507, the destination address is transferred to the destination address as it is (step S510) and the process is terminated.
  • the edge router 140 and the front-end processing device 190 are configured by a general computer system including an input device, an output device, a storage device, and a control device. Therefore, the above capsule address list and binding list are stored in a storage device.
  • FIG. 11 is a diagram showing the operation when the mobile terminal 130 is registered in the user power MS together with the header information with the edge router 140 and the front-end processing device 190 as the center. The specific operation of the embodiment will be described with reference to FIG. 4 and FIG.
  • the broken line arrow indicates the upward direction of the force from the mobile terminal 130 to the HSS 180
  • the solid line arrow indicates the downward direction of the direction force from the HSS 180 to the mobile terminal 130.
  • the mobile terminal 130 transmits the register message of the mobile terminal 130 including the subscriber information of the mobile terminal 130, the source address is the mobile terminal 130, and the destination address is P—CSCF server 160, the register The message is received by the edge router 140 under the control of the mobile terminal 130.
  • the edge router 140 confirms the destination address of the received Register message and confirms whether it is in the encapsulated address list shown in FIG.
  • the front-end processing device 190 associated with the destination address is set as the external destination address, and the self (edge router) 140) is encapsulated as an external source address and transferred to the front-end processing device 190.
  • the front-end processing device 190 When the front-end processing device 190 receives the packet transferred from the edge router 140, it checks the destination address. In this case, since the destination address is addressed to itself, decapsulation is performed to remove the capsule, the internal source address (mobile terminal 130) is set as the source address, and the internal destination address (P-CSCF server 160) is set as the destination address. The packet is transferred to the P—CSCF server 160. When decapsulation is performed, a binding list in which the internal transmission source address (mobile terminal 130) is associated with the external transmission source address (edge router 140) is generated.
  • the CSCF server 160 When the CSCF server 160 receives the packet transferred from the front-end processing device 190, it registers the subscriber information and home address of the mobile terminal 30, and registers the message This packet is reconfigured to generate a packet with the source address as self (P—CSCF server 160) and the destination address as S CSCF server 170, and forward to S CSCF server 170.
  • the S—CSCF server 170 When the S—CSCF server 170 receives the packet transferred from the P—CSCF server 160, the S—CSCF server 170 confirms the validity of the subscriber information included in the Register message via the HSS 180, and the mobile terminal 130 Information and the address of the P—CSCF server 160 are registered, and an OK message is transmitted to the P-CSCF server 160 with the source address as S—CSCF server 170 and the destination address as P—CSCF server 160.
  • P—The CSCF server 160 uses the destination address of the received packet as the home address of the mobile terminal 130 contained in the Register message, and sets the source address as its own (P—CSC F server 160). Transfer to processing device 190.
  • the transfer operation to the front-end processing device 190 here is uniquely performed regardless of the destination address.
  • the front-end processing device 190 When the front-end processing device 190 receives the packet transferred from the P—CSCF server 160, it checks the destination address. In this case, since the destination address is addressed to the mobile terminal 130 that is not addressed to itself, the edge list registered as the external source address corresponding to the mobile terminal 130 of the internal source address is referred to the nodding list.
  • the data 140 is encapsulated as an external destination address, and is self-encapsulated (front-end processing unit 190) as an external source address, and is transmitted to the edge router 140.
  • the edge router 140 When the edge router 140 receives the packet transferred from the front-end processing device 190, it checks the destination address. In this case, since the destination address is addressed to itself, decapsulation is performed to remove the encapsulation, and the packet is transferred to the mobile terminal 130.
  • transmission to a mobile terminal is performed without going through a visited network power home network in downstream communication, and the communication path is shortened. We were able to.
  • FIG. 12 is a block diagram showing a configuration of a second embodiment of the packet transfer system configured according to the present invention.
  • home network 210 In FIG. 10, home network 210, visited network 220, P—CSCF260, S Each of CSCF270 and HSS280 performs the same operation as home network 110, visited network 120, P—CSCF160, S—CSCF170, and HSS180 shown in FIG.
  • the configuration of the present invention is adapted to Hierarchical Mobile IPv6 (hereinafter referred to as HMIPv6), and the visited network 220 is provided with a MAP (Mobile Anchor Point) 200.
  • HMIPv6 Hierarchical Mobile IPv6
  • the HoA that is an IP address created in the subnet held by the home agent 250 as the address
  • the RCoA (Regional Care-of Address) that is the CoA created in the subnet held by the MAP 200
  • the edge router 240 LCoA On-link Care-of Address
  • the edge router 240 manages the address of the MAP 200 and advertises it to the subordinate mobile terminal together with its own address, and the mobile terminal 230 receives the announcement of the edge router 240 and thereby receives RCoA and LCoA. It generates and notifies the correspondence between HoA and RCoA to home agent 250, and notifies the correspondence between RCoA and LCoA to MAP200. Based on this notification, home agent 250 manages the correspondence between HoA and RCoA of mobile terminal 230, and MAP 200 manages the correspondence between RCoA and LCoA of mobile terminal 230. In addition, the edge router 240 manages all of HoA, RCoA, and LCoA of the mobile terminal 230!
  • the edge router 240 in this embodiment is registered with the address of the front-end processing device 290 associated with the address of the P—CSCF 260!
  • a packet addressed to the P—CSCF260 address registered in the capsule address list is provided with an address list, and the destination address is used as the address of the associated front-end processor 290 for encapsulation. It has a function to transfer data.
  • the difference from the embodiment shown in FIG. 4 is that, in the embodiment shown in FIG. 4, the source address is set as its own address, but in this embodiment, it is encapsulated as R CoA of mobile terminal 230. It is a point to do.
  • FIG. 13 is a block diagram showing a main configuration of the edge router 240 in the present embodiment.
  • the edge router 240 manages the encapsulated address list 601 and its own address, the ER address 602, and the HoA, RCoA, and LCoA of the mobile terminal 230.
  • Information storage unit 600 that stores binding cache 603, determination control unit 604, interface unit 605, encapsulation processing unit 606, decapsulation processing unit 607, routing processing unit 608, and HMIP control processing unit 609 Consists of.
  • the determination control unit 604 refers to the content stored in the information storage unit 600 for the packet transmitted / received via the interface unit 605, and controls the processing content performed by each unit according to the result.
  • the encapsulation processing unit 606 and the decapsulation processing unit 607 perform the capsule processing and the decapsulation processing according to the control of the judgment control unit 604, respectively. This is performed via the processing unit 608 and the interface unit 605.
  • the HMIP control processing unit 609 performs processing necessary for HMIP control, such as changing the contents stored in the binding cache 602.
  • the front-end processing device 290 When the front-end processing device 290 receives a packet whose destination address is the address of the front-end processing device 290 and whose source address is encapsulated by the RCoA of the mobile terminal 230, the front-end processing device 290 receives the internal source address (mobile terminal ) And an external source address (RCoA) are generated.
  • the internal source address mobile terminal
  • RoA external source address
  • the MAP 200, the edge router 240, and the front-end processing device 290 are configured by a general computer system including an input device, an output device, a storage device, and a control device.
  • the judgment control unit 604 When receiving the packet (step S901), the judgment control unit 604 refers to the binding cache 603 and confirms whether the destination address is RCoA or LCoA managed by itself (step S902). Destination address is addressed to RCoA or LCoA managed by itself If the received packet is a packet, the packet is decapsulated (step S903), transferred to the internal destination address (step S604), and the process ends. If it is confirmed in step S902 that the destination address is managed by RCoA or LCoA! /, The encapsulated address list 601 is searched (step S905), and the destination address is encapsulated. It is confirmed whether it is registered in the generalized address list 601! (Step S906).
  • the address of the front-end processing device 290 that is registered and registered is the external destination address, and the RCoA corresponding to the internal source address is Capsule as external source address (step S907), transfer to external destination address (step S908), and end. If it is confirmed that the destination address is registered in the encapsulated address list 601 in step S906, the destination address is transferred to the destination address (step S909), and the process ends.
  • the front-end processing device 190 When receiving the packet (step S1001), the front-end processing device 190 refers to the FE address 502 and confirms whether the destination address is its own address (step S502). If it is a packet addressed to itself, decapsulate it (step S1003), generate a binding list 501 that associates the internal source address (mobile terminal) with the external source address (RCoA) (step S1004), Transfer (step S1005) to finish. When it is confirmed in step S1002 that the destination address is not its own address, the nodding list 501 is searched to check whether the destination address is registered as an internal source address (step S1007).
  • step S1008 If the destination address is registered as a source address in the binding list 501, the corresponding external source address is set as the external destination address, and its own address is encapsulated as the external source address (step S1008). Transfer to MAP200 (step S1009) and end. If it is confirmed in step S1007 that the destination address is not registered in the binding list 501 as the source address, it is transferred to the destination address as it is (step S1010) and the process ends.
  • FIG. 16 is a diagram showing an operation when the mobile terminal 230 is registered in the user power MS together with header information centering on the edge router 240 and the front-end processing device 290. The specific operation of the embodiment will be described with reference to FIG. 12 and FIG. To do.
  • a broken line arrow indicates an upward direction from the mobile terminal 230 to the HSS 280
  • a solid line arrow indicates a downward direction of the force from the HSS 280 to the mobile terminal 230.
  • the mobile terminal 230 When the mobile terminal 230 moves to the visited network 220, it registers with the IMS in order to receive multimedia services on the visited network 220.
  • the mobile terminal 230 sends the register message of the mobile terminal 230 including the subscriber information and home address of the mobile terminal 230, the source address is the mobile terminal 230, and the destination address is P—CSCF server 260, the Register message Received by edge router 240 under 230.
  • the edge router 240 confirms the destination address of the received Register message and confirms whether it is in the encapsulated address list.
  • the front-end processing device 290 associated with the destination address is set as the external destination address and the internal source address. Encapsulation is performed using the RCoA of the mobile terminal 230 as an external source address, and is transferred to the front-end processing device 290.
  • the front-end processing device 290 When the front-end processing device 290 receives the packet transferred from the edge router 240, it checks the destination address. In this case, since the destination address is addressed to itself, decapsulation is performed to remove the capsule, the internal source address (mobile terminal 230) is used as the source address, and the internal destination address (P—CSCF server 260) is used as the destination address. The packet is transferred to the P—CSCF server 260. When decapsulation is performed, a binding list in which the internal transmission source address (mobile terminal 130) is associated with the external transmission source address (RCoA) is generated.
  • the internal transmission source address mobile terminal 130
  • RoA external transmission source address
  • the S—CSCF server 270 When the S—CSCF server 270 receives the packet transferred from the P—CSCF server 260, the S—CSCF server 270 confirms the validity of the subscriber information included in the Register message via the HSS 280, and Information and P—Register the CSCF server 260 address, The source address is S—CSCF server 270 and the destination address is P—CSCF server 260 to P—CSCF server 260.
  • P—CSCF server 260 uses the destination address of the received packet as the home address of mobile terminal 230 contained in the Register message, and sets the source address as its own (P—CSC F server 260). Transfer to processor 290. The transfer operation to the front-end processing device 290 here is uniquely performed regardless of the destination address.
  • the front-end processing device 290 When the front-end processing device 290 receives the packet transferred from the P—CSCF server 160, it checks the destination address. In this case, since the destination address is addressed to the mobile terminal 230 that is not addressed to itself, the RCoA registered as the external source address corresponding to the mobile terminal 230 of the internal source address is referred to by referring to the nodding list.
  • the external destination address is encapsulated as the self (front-end processing unit 290) external source address and transferred to the MAP 200.
  • the transfer operation to MAP200 here is performed by the destination address RCoA.
  • the MAP 200 When the MAP 200 receives the packet transferred from the front-end processing device 290, it transfers the packet to the edge router 240. In this forwarding operation, the encapsulation is duplicated with the LCoA corresponding to the RCoA that is the external destination address of the received packet as the external destination address of the forward packet and the self (MAP) address as the external source address of the forward packet. Forward as a packet The transfer operation to the edge router 240 here is performed by the destination address LCoA.
  • the edge router 240 When the edge router 240 receives the packet transferred from the MAP 200, the edge router 240 checks the destination address. In this case, since the destination address powers are SLCoA and RCoA, decapsulation that removes the power psalization is performed twice and transferred to the mobile terminal 230.
  • the mobile router since the downlink communication power SLCoA transferred by the MAP 200 is used, the mobile router moves and the edge router under the control of the mobile terminal is changed. However, it is sent to the edge router under the control of the mobile terminal.
  • FIG. 17 is a block diagram showing the configuration of the third embodiment of the packet transfer system configured according to the present invention.
  • the function of the front-end processing device 190 in the first embodiment shown in FIG. 4 is inserted into the P-CSCF server 160 to form a P-CSCF server 1160. Since the other configuration is the same as that of the embodiment shown in FIG. 4, the same reference numerals as those in FIG.
  • FIG. 18 is a block diagram showing a main configuration of P-CSCF server 1160 in FIG.
  • the P—CSCF server 1160 has an information storage unit 700 that stores the binding list 701 and its own address P—CSCF address 702, a list registration processing unit 703, and a semi-U connection. It consists of a U control 704, an interface 705, a P-CSCF processing unit 706, a force processing unit 707, a decapsulation processing unit 708, and a routing processing unit 709.
  • Judgment control section 704 refers to the stored contents of information storage section 700 for the packets transmitted / received via interface section 705, and controls the processing contents performed by each of the above sections according to the result.
  • the list registration processing unit 703 performs registration processing in the information storage unit 700 under the control of the judgment control unit 704, and the capsule processing unit 706 and the decapsulation processing unit 707 perform capsule processing according to the control of the judgment control unit 704.
  • the trapping process and the decapsulation process are respectively performed! /, And the processed packet is transmitted to the outside via the routing processing unit 709 and the interface unit 705. Further, the P-CSCF server is processed by the P-CSCF processing unit 706.
  • FIG. 19 is a diagram illustrating an operation when registering the mobile terminal 130 in the user power MS together with header information centering on the edge router 140.
  • the edge router 140 does not need to manage the external destination address of the capsule address list.
  • the external source address is the self (edge router) address
  • the P—CSCF server address is used for the external destination address. Encapsulation will be performed.
  • FIG. 20 is a block diagram showing the configuration of the fourth embodiment of the packet transfer system according to the present invention
  • FIG. 21 shows the operation when registering the mobile terminal 230 to the user power MS, It is a figure shown with header information centering on the edge router 240, and below, the specific operation
  • the function of the front-end processing device 290 in the second embodiment shown in FIG. 12 is threaded into the P-CSCF Sano 260 to form a P-CSCF server 1260.
  • Other configurations are the same as those in the embodiment shown in FIG. 12, and therefore, the same numbers as those in FIG.
  • the configuration of the P-CSCF server 1260 is the same as that of the P-CSCF server 1160 in the third embodiment shown in FIG.
  • the edge router 240 does not need to manage the external destination address in the capsule address list as in the third embodiment.
  • the external source address is RCo A
  • the external destination address is the address of P-CSCF server 1260. Will be performed capsules.
  • FIG. 22 is a block diagram showing the configuration of the fifth embodiment of the packet transfer system configured according to the present invention.
  • the function of the edge router 140 in the first embodiment shown in FIG. 4 is incorporated in the mobile terminal 130 to form a mobile terminal 1130. Since the other configuration is the same as that of the embodiment shown in FIG. 4, the same reference numerals as those in FIG.
  • FIG. 23 is a block diagram showing a main configuration of the mobile terminal 1130 in the present embodiment.
  • the mobile terminal 1130 includes an encapsulated address list 801, an information storage unit 800 that stores a binding cache 802 that manages its own HoA and CoA, a MIP control processing unit 803, and a decision control A unit 804, an interface unit 805, an application processing unit 806, an encapsulation processing unit 807, a decapsulation processing unit 808, and a routing processing unit 809 are included.
  • the determination control unit 804 transmits and receives packets transmitted and received via the interface unit 805.
  • the content stored in the information storage unit 800 is referred to, and the processing content performed by each of the above units is controlled according to the result.
  • the encapsulation processing unit 807 and the decapsulation processing unit 808 perform the capsule processing and the decapsulation processing according to the control of the judgment control unit 804, respectively, and routing the processed packets to the outside is routed. This is performed via the processing unit 80 9 and the interface unit 805.
  • the MIP control processing unit 803 performs processing necessary for MIP control, such as a location registration request to the home agent and a change in the contents stored in the binding cache 802.
  • the application processing unit 806 processes an operation as a mobile terminal such as displaying an application in accordance with the control of the determination control unit 804.
  • Fig. 24 is a diagram showing the operation when registering the mobile terminal 1130 in the user power MS together with the header information centering on the mobile terminal 1130.
  • the mobile terminal 1130 When the 1130 transmits a packet to the front-end processing device, as shown in FIG. 24, the external source address is the CoA of the mobile terminal 1130, and the external destination address is the capsule using the address of the front-end processing device 190. Will be performed.
  • FIG. 25 is a block diagram showing the configuration of the sixth embodiment of the packet transfer system configured according to the present invention.
  • the function of the edge router 240 in the second embodiment shown in FIG. 12 is incorporated in the mobile terminal 230 to form a mobile terminal 1230.
  • Other configurations are the same as those of the embodiment shown in FIG. 12, and therefore, the same numbers as those in FIG.
  • FIG. 26 is a block diagram showing a main configuration of the mobile terminal 1230 in the present embodiment.
  • the mobile terminal 1230 includes an encapsulated address list 1401, an information storage unit 1400 for storing a binding cache 1402 for managing all of its own HoA, RCoA, and LCoA, and an HMIP control processing unit. 1403, a judgment control unit 1404, an interface unit 1405, an application processing unit 1406, an encapsulation processing unit 1407, a decapsulation processing unit 1408, and a routing processing unit 1409 are configured.
  • Judgment control unit 1404 transmits and receives packets via interface unit 1405. Then, the contents stored in the information storage unit 1400 are referred to, and the processing contents performed by each of the above units are controlled according to the result.
  • the encapsulation processing unit 1407 and the decapsulation processing unit 1408 perform the capsule processing and the decapsulation processing according to the control of the judgment control unit 1404, respectively, and send out the processed packets and the like to the outside. This is performed via 1409 and the interface unit 1405.
  • the HMIP control processing unit 14 03 performs processing necessary for HMIP control, such as changing the contents stored in the binding cache 1402.
  • the application processing unit 1406 processes an operation as a mobile terminal such as displaying an application according to the control of the determination control unit 1404.
  • FIG. 27 is a diagram showing an operation when the mobile terminal 1230 is registered in the user power MS together with the header information with the mobile terminal 1230 as the center.
  • the external source address is the RCoA of the mobile terminal 1230 and the external destination address
  • the capsule using the address of the front-end processor 190 is performed.
  • FIG. 28 is a block diagram showing the configuration of the seventh embodiment of the packet transfer system configured according to the present invention.
  • the function of the front end processing device 290 in the second embodiment shown in FIG. 12 is incorporated into the MAP 200 to form a MAP 1200.
  • Other configurations are the same as those of the embodiment shown in FIG. 12, and therefore, the same numbers as those in FIG.
  • FIG. 29 is a block diagram showing a main configuration of the MAP 1200 in the present embodiment.
  • the MAP 1200 has a binding list 1501 and a MAP address 1502 that is its own address, a mobile end, and an information storage unit 1500 that stores a binding cache 1503 that manages RCoA and LCoA of t230, A control processing unit 1504, a judgment control unit 1505, an interface unit 1506, a force processing unit 1507, a decapsulation processing unit 1508, and a routing processing unit 1509 are also configured.
  • the judgment control unit 1505 handles packets transmitted / received via the interface unit 1506.
  • the content stored in the information storage unit 1500 is referred to, and the processing content performed by each of the above units is controlled according to the result.
  • the encapsulation processing unit 1507 and the decapsulation processing unit 1508 perform the capsule processing and the decapsulation processing according to the control of the judgment control unit 1505, respectively, and send out the processed packets to the outside. This is performed via the 1509 and the interface unit 1506.
  • the HMIP control processing unit 15 04 performs processing necessary for HMIP control, such as changing the contents stored in the binding cache 1503.
  • FIG. 30 is a diagram illustrating an operation when registering the mobile terminal 230 in the user power MS together with header information with the edge router 240 as the center.
  • the edge router 240 transmits a packet to the server P—CSCF 260 registered at the internal destination address in the encapsulated address list, as shown in FIG. 13J, the external source The address is RCoA, and the external destination address is encapsulated using the MAP 1200 address.
  • FIG. 31 is a block diagram showing the configuration of the eighth embodiment of the packet transfer system configured according to the present invention.
  • FIG. 32 shows the operation when registering the mobile terminal 2230 in the user power MS. It is a figure shown with header information centering on the mobile terminal 2230 and the MAP 2200. The specific operation of the present embodiment will be described below with reference to FIG. 31 and FIG.
  • the function of the edge router 240 in the second embodiment shown in FIG. 12 is incorporated into the mobile terminal 230 to form the mobile terminal 2230, and the function of the front-end processing device 290 is incorporated into the MAP 200. It is what. Other configurations are the same as those of the embodiment shown in FIG. 12, and therefore, the same numbers as those in FIG.
  • the configuration of mobile terminal 2230 is the same as that of mobile terminal 1230 shown in FIG. 26, and the configuration of MAP 2200 is the same as that of MAP 1200 shown in FIG.
  • the mobile terminal 2230 transmits a packet to the server P—CSCF 260 registered at the internal destination address in the capsule address list, as shown in FIG.
  • the external source address is RCoA
  • the external destination address is encapsulated using the MAP2200 address.
  • the present invention may be applied to an access system to a server that exists in a regional network described as a system for receiving an IMS service. In this case as well, all the above embodiments can be applied.
  • the MAP, edge router and front-end processing device, and P-CSCF server are configured by a general computer system including input devices, output devices, storage devices, and control devices.
  • the invention includes a program for causing a computer system to execute the operations performed by the MAP, edge router and front-end processing device, P-CSCF server described in each embodiment, and a recording medium for storing the program. Including.

Abstract

L’invention permet de raccourcir le trajet de communication entre un terminal mobile et un serveur par protocole IP. Un nœud contenant une liste d’adresses encapsulée est inséré dans le trajet de communication entre le terminal mobile et le serveur, et le serveur enregistré dans la liste est encapsulé au moment du transfert. Cette encapsulation est libérée avant l’exécution du procédé par le serveur. Une liste de liaison corrélant une adresse source de transmission interne à une adresse de transmission externe est alors générée et une réponse du serveur est transmise à la source de transmission externe enregistrée par la liste de liaison.
PCT/JP2005/022433 2005-03-30 2005-12-07 Systeme et procede de transfert de paquets, dispositif et programme constituant le systeme et support d’enregistrement WO2006112081A1 (fr)

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