WO2013044688A1 - 一种在pmip域间漫游时的节点通信方法及通信系统 - Google Patents

一种在pmip域间漫游时的节点通信方法及通信系统 Download PDF

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Publication number
WO2013044688A1
WO2013044688A1 PCT/CN2012/079762 CN2012079762W WO2013044688A1 WO 2013044688 A1 WO2013044688 A1 WO 2013044688A1 CN 2012079762 W CN2012079762 W CN 2012079762W WO 2013044688 A1 WO2013044688 A1 WO 2013044688A1
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Prior art keywords
pmip domain
node
terminal node
visited
home
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PCT/CN2012/079762
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English (en)
French (fr)
Inventor
涂杨巍
霍玉臻
沈岷
江鸿
王志海
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中兴通讯股份有限公司
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Publication of WO2013044688A1 publication Critical patent/WO2013044688A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/02Communication route or path selection, e.g. power-based or shortest path routing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/02Processing 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
    • H04W8/08Mobility data transfer
    • H04W8/12Mobility data transfer between location registers or mobility servers

Definitions

  • the present invention relates to the field of communications, and in particular, to a node communication method and a communication system when roaming between PMIP domains.
  • IP Transmission Control Protocol/Internet Protocol
  • IP provides routing for the Internet. It assigns logical addresses, ie IP addresses, to all nodes (including hosts and routers), and each port of each host is assigned.
  • An IP address includes the network prefix and the host part.
  • the IP addresses of all hosts on the same link usually have the same network prefix and different host parts. This allows IP to be routed based on the network prefix portion of the destination node's IP address, allowing the router to maintain a simple network prefix route without having to maintain a separate route for each host. In this case, since the network prefix route is used, when the node switches from one link to another without changing its IP address, the node cannot receive the data packet on the new link. Therefore, it is impossible to communicate with other nodes.
  • the mobile Internet has become the development direction of the future Internet, but the traditional TCP/IP protocol does not support the defect of mobility, making the mobility management of the terminal node a major problem facing the mobile Internet.
  • MIP Mobile IP
  • PMIP Proxy MIP
  • HA Home Agent
  • LMA Local Mobility Anchor
  • Figure 1 shows the logical architecture of the PMIP protocol, including the Mobile Node (MN), the Correspondent Node (CN), the Mobile Access Gateway (MAG), and the Local Mobility Anchor (Local). Mobility Anchor, LMA).
  • MN Mobile Node
  • CN Correspondent Node
  • MAG Mobile Access Gateway
  • LMA Local Mobility Anchor
  • LMA Local Mobility Anchor
  • the CN can be a fixed node or a mobile node, that is, it has a corresponding MAG and LMA.
  • the MAG is the first hop router of the MN, and its main functions include assigning a Care of Address (CoA) to the MN when accessing it, and performing PMIP Binding (MMIP Binding) with the MN's anchor LMA instead of the MN. .
  • the LMA's main functions include assigning the Home of Address (HoA) to the MN and processing the above PMIP binding.
  • HoA Home of Address
  • the main purpose of the PMIP binding performed between the MAG and the LMA is to let both parties know the address of the other party, namely the above CoA and HoA, and save the binding relationship locally.
  • a bidirectional tunnel is established between the MAG and the LMA for the MN.
  • the IP address finally obtained by the MN is the HoA assigned by the LMA.
  • the MAG is generally located at a lower topology, such as at the edge of a metropolitan area network; and the LMA is generally located at a higher topology, such as the core of the provincial backbone.
  • the MAG and the LMA are often connected by a multi-hop router.
  • the terminal node or the peer node can obtain the current end of the other end from the other network element by using the local MAG. Serving the MAG, thus establishing a direct link between the two MAGs without rerouting the packets to the LMA, greatly reducing the routing problem.
  • the above domain is called a PMIP domain that supports route optimization.
  • the system architecture of the PMIP inter-domain node roaming is shown in Figure 2.
  • the PMIP domain can be divided into a PMIP domain that supports route optimization and a PMIP domain that does not support route optimization, that is, a traditional PMIP domain.
  • PMIP domain that supports route optimization in addition to the traditional network element MAG, it includes a mapping server (MAPS), which mainly performs node location management and address mapping relationship maintenance. It also includes one or more Interworking Gateway (JGW) for interworking with other PMIP domains. Its main functions include signaling interaction with other PMIP domains that support route optimization. It is also the PMIP domain and other PMIPs.
  • MMS mapping server
  • JGW Interworking Gateway
  • Its main functions include signaling interaction with other PMIP domains that support route optimization.
  • PMIP domain and other PMIPs For the data export between domains, in the specific implementation, multiple interworking gateways can be set at the boundary of the domain.
  • interworking gateways are selected according to the route optimization principle.
  • the interworking gateway can be combined with a border router or a separate device.
  • interworking The gateway needs to broadcast its own ⁇ /home network prefix.
  • the current PMIP network architecture is based on the movement of the terminal node under the same local mobility anchor point in the same PMIP domain, and the method of the terminal roaming from one PMIP domain to another PMIP domain has not been defined, especially the terminal is supporting routing.
  • the technical problem to be solved by the present invention is to provide a node communication method and a communication system when roaming between PMIP domains, and to solve communication problems when nodes roam between PMIP domains.
  • the present invention provides a node communication method when roaming between PMIP domains, wherein the visited PMIP is accessed after the terminal node roams from a home PMIP domain supporting route optimization to a visited PMIP domain supporting route optimization.
  • the domain assigns, to the terminal node, a roaming identifier indicating location information of the terminal node in the visited PMIP domain, and binds the roaming identifier to a home network prefix of the terminal node, and notifies the roaming identifier to the terminal
  • the home PMIP domain is bound to the home network prefix of the terminal node and the roaming identifier; in the first data packet transmission process of the peer node to the terminal node, the home PMIP domain Querying the roaming identifier according to the home network prefix of the terminal node, the PMIP domain to which the peer node belongs is the destination network of the mobile access gateway to which the terminal node belongs in the visited PMIP domain according to the roaming identifier.
  • the first packet is sent to the visited PMIP domain.
  • the foregoing method may further have the following features: after the terminal node roams from the home PMIP domain that supports route optimization to the visited PMIP domain that supports route optimization, the mobile access gateway to which the terminal node belongs sends a proxy binding update to the mapping server. And the mapping server sends the roaming identifier to the interworking gateway to which the terminal node belongs, directly or via the mobile access gateway, and the interworking gateway notifies the roaming identifier to the home PMIP domain.
  • the foregoing method may further have the following feature: the mapping server of the visited PMIP domain binds the home network prefix of the terminal node and the roaming identifier;
  • the peer node When the peer node is located in the visited PMIP domain, the peer node sends the first data packet to the terminal node, and the mobile access gateway to which the opposite node belongs uses the home of the terminal node.
  • the home network prefix queries the mapping server for the information of the mobile access gateway to which the terminal node belongs, and the mapping server that visits the PMIP domain queries the roaming identifier according to the home network prefix, and implements the opposite to the opposite end in the visited PMIP domain.
  • the data of the node is sent.
  • the foregoing method may further have the following feature: when the peer node is located in the visited PMIP domain, the terminal node sends the first data packet to the peer node, and the terminal node sends the visited PMIP domain to the visited PMIP domain.
  • the mobile access gateway sends a first data packet, and the mobile access gateway queries the mapping server of the visited PMIP domain to query the location information of the opposite node, and sends the first data packet to the mobile access gateway to which the opposite node belongs. To the opposite node.
  • the foregoing method may further have the following feature: when the peer node is located in the PMIP domain outside the visited PMIP domain, the terminal node sends the first data packet to the peer node, and the terminal node
  • the mobile access gateway that visits the PMIP domain sends a first data packet
  • the mobile access gateway queries the mapping server of the visited PMIP domain to query the location information of the opposite node, and after receiving the inter-domain communication indication sent by the mapping server,
  • the first data packet is sent to a PMIP domain to which the peer node belongs.
  • the above method may also have the following features:
  • the mobile access gateway of the home PMIP domain receives the first data packet sent by the correspondent node to the terminal node, and uses the home network of the terminal node.
  • the prefix is queried to the mapping server of the home PMIP domain to query the location information of the terminal node, the roaming identifier is obtained, and the mobile access gateway to which the terminal node belongs in the visited PMIP domain is used as a destination network according to the roaming identifier.
  • the first data packet is sent to the mobile access gateway to which the terminal node belongs in the visited PMIP domain, and the mobile access gateway to which the terminal node belongs in the visited PMIP domain sends the first data packet to The terminal node.
  • the foregoing method may further have the following feature: when the correspondent node is located in the PMIP domain that supports route optimization except the home PMIP domain and the visited PMIP domain, the interworking gateway of the home PMIP domain is After receiving the first data packet sent by the opposite end node to the terminal node, the interworking gateway of the PMIP domain to which the peer node belongs is queried to the mapping server of the home PMIP domain by using the home network prefix of the terminal node.
  • the roaming identifier when the location information of the terminal node is obtained, and sending, according to the roaming identifier, the first data packet to the visited PMIP by using the mobile access gateway to which the terminal node belongs in the visited PMIP domain Terminal section in the domain
  • the mobile access gateway to which the point belongs, the mobile access gateway to which the terminal node belongs in the visited PMIP domain sends the first data packet to the terminal node.
  • the foregoing method may further have the following feature: the peer node is located in the attribution
  • the interworking gateway of the PMIP domain to which the peer node belongs receives the first data packet sent by the opposite node to the terminal node,
  • the interworking gateway of the home PMIP domain uses the home network prefix of the terminal node to query the mapping server of the home PMIP domain for the location information of the terminal node, and learns the roaming identifier, and the PMIP to which the peer node belongs
  • the interworking gateway of the domain sends the first data packet to the mobile access gateway to which the terminal node belongs in the visited PMIP domain according to the roaming identifier, and the mobile access gateway to which the terminal node belongs in the visited PMIP domain Sending the first data packet to the terminal node.
  • the foregoing method may further have the following feature: after the interworking gateway of the home PMIP domain queries the mapping server of the home PMIP domain to query the location information of the terminal node, after obtaining the roaming identifier, notifying the roaming identifier And the interworking gateway to which the peer node belongs in the PMIP domain to which the peer node belongs; the interworking gateway to which the peer node belongs receives the subsequent data packet sent by the peer node to the terminal node, and directly sends the Go to the visited PMIP domain.
  • the above method may also have the following features:
  • the interworking gateway of the home PMIP domain receives the local mobility anchor from the PMIP domain to which the peer node belongs.
  • the home network prefix of the terminal node is used to query the mapping server of the home PMIP domain to query the location information of the terminal node, and the roaming identifier is obtained according to the The roaming identifier sends the first data packet to the mobile access gateway to which the terminal node belongs in the visited PMIP domain by using the mobile access gateway to which the terminal node belongs in the visited PMIP domain as a destination network element.
  • the mobile access gateway to which the terminal node belongs in the visited PMIP domain sends the first data packet to the terminal node.
  • the above method may also have the following features:
  • the local mobility anchor point of the PMIP domain to which the peer node belongs is forwarded to the visited PMIP domain via the home PMIP domain.
  • the above method may also have the following features:
  • the terminal node switches from the source mobile access gateway of the visited PMIP domain to the target mobile access gateway, and the mapping server of the visited PMIP domain sends the described via the interworking gateway of the visited PMIP domain and the home PMIP domain.
  • the mapping server notifying the address of the target mobile access gateway to the mobile access gateway of the home PMIP domain, and the mobile access gateway will The address of the target mobile access gateway is notified to the interworking gateway of the home PMIP domain, and the interworking gateway notifies the address of the target mobile access gateway to the mobile access gateway to which the correspondent node belongs.
  • the present invention further provides a node communication system for roaming between PMIP domains, which includes a terminal node, a peer node, a home PMIP domain to which the terminal node belongs, and a terminal node to which the terminal node belongs. Supporting the route optimization of the PMIP domain and the PMIP domain to which the peer node belongs;
  • the visited PMIP domain is configured to: after the terminal node roams from the home PMIP domain supporting route optimization to the visited PMIP domain that supports route optimization, assigning, to the terminal node, location information indicating that the terminal node is in the visited PMIP domain Binding the roaming identifier to the home network prefix of the terminal node, and notifying the roaming identifier to the home PMIP domain;
  • the home PMIP domain is configured to: bind the home network prefix of the terminal node to the roaming identifier; and further, during the first data packet transmission process from the peer node to the terminal node, The home network prefix of the terminal node queries the roaming identifier;
  • the PMIP domain to which the peer node belongs is further set as: according to the roaming identifier, the visit
  • the mobile access gateway to which the terminal node belongs in the PMIP domain sends the first data packet to the visited PMIP domain for the destination network element.
  • the above system may also have the following characteristics:
  • the visited PMIP domain includes a mapping server; the home PMIP domain includes a mapping server; and the mapping server of the visited PMIP domain is configured to: allocate, to the terminal node, location information indicating that the terminal node is in the visited PMIP domain. Roaming the identifier and binding the roaming identifier to a home network prefix of the terminal node;
  • the mapping server of the home PMIP domain is configured to: learn the end from the visited PMIP domain After the roaming identifier of the end node, the roaming identifier is bound to the home network prefix of the terminal node.
  • the foregoing system may further have the following features: the home PMIP domain includes a mobile access gateway; and the visited PMIP domain includes a mobile access gateway;
  • the mobile access gateway of the home PMIP domain is configured to: after receiving the first data packet sent by the opposite node to the terminal node, use the home network prefix of the terminal node to the mapping server of the home PMIP domain
  • the roaming identifier is obtained when the location information of the terminal node is queried, and the first data packet is sent to the mobile access gateway of the visited PMIP domain via the interworking gateway of the home PMIP domain.
  • the above system may also have the following characteristics:
  • the home PMIP domain includes an interworking gateway
  • the interworking gateway of the home PMIP domain is configured to: after receiving the first data packet sent by the opposite end node to the terminal node, query the mapping server of the home PMIP domain by using the home network prefix of the terminal node
  • the roaming identifier is obtained when the location information of the terminal node is described, and the first data packet is sent to the interworking gateway of the visited PMIP domain.
  • the above system may also have the following characteristics:
  • the interworking gateway of the home PMIP domain is further configured to notify the roaming identifier to the visited PMIP domain after the roaming identifier is obtained from the mapping server of the home PMIP domain.
  • the above system may also have the following characteristics:
  • the PMIP domain to which the peer node belongs includes an interworking gateway
  • the interworking gateway of the PMIP domain to which the peer node belongs is configured to: after receiving the first data packet sent by the peer node to the terminal node, query the home PMIP domain by using the home network prefix of the terminal node After the roaming identifier is known, the first data packet is sent to the visited domain according to the roaming identifier.
  • the present invention further provides a mapping server, wherein the mapping server includes a roaming identifier processing module; and the roaming identifier processing module is configured to: a visit to which the mapping server belongs after roaming as a terminal node When the server is mapped in the PMIP domain, the terminal node is assigned a roaming indicating the location information of the terminal node in the visited PMIP domain. And binding the roaming identifier to a home network prefix of the terminal node, and notifying the roaming identifier to the home PMIP domain.
  • the present invention further provides a mapping server, wherein the mapping server includes a roaming identifier processing module; and the roaming identifier processing module is configured to: in the home PMIP domain where the mapping server is a terminal node When the server is mapped, after receiving the request for querying the location of the terminal node by using the home network prefix of the terminal node to the mapping server, the roaming identifier is provided to the requesting party.
  • Figure 1 is a schematic diagram of the architecture of the PMIP system
  • FIG. 3 is a schematic diagram of a node communication method when roaming between PMIP domains
  • FIG. 4 is a schematic diagram of Embodiment 1 of a method for registering and updating a terminal between a PMIP domain that supports route optimization;
  • FIG. 5 is a schematic diagram of Embodiment 2 of a method for registering and updating a terminal in a PMIP domain supporting route optimization
  • FIG. 6 is a schematic diagram of a route optimization method for inter-node communication when the peer end is located in the visited PMIP domain of the terminal;
  • FIG. 7 is a schematic diagram of a route optimization method for inter-node communication when the peer end is located in the home PMIP domain of the terminal;
  • FIG. 8 is a schematic diagram of a route optimization method for inter-node communication when the peer end is located in another PMIP domain that supports route optimization;
  • FIG. 9 is a schematic diagram of a route optimization method for inter-node communication when the peer end is located in another PMIP domain that supports route optimization;
  • FIG. 10 is a schematic diagram of a route optimization method for inter-node communication when a peer end is located in a traditional PMIP domain
  • FIG. 11 is a schematic diagram of a method for updating address information after a terminal cross-MAG handover in a visited domain.
  • the node communication method when roaming between PMIP domains includes:
  • the visited PMIP domain After the terminal node roams from the home PMIP domain that supports route optimization to the visited PMIP domain that supports route optimization, the visited PMIP domain allocates a roaming identifier indicating the location information of the terminal node in the visited PMIP domain to the terminal node. Binding the roaming identifier to the home network prefix of the terminal node, and notifying the roaming identifier to the home PMIP domain, where the home PMIP domain binds the home network prefix of the terminal node and the roaming identifier Set
  • the home PMIP domain queries the roaming identifier according to the home network prefix of the terminal node, and the PMIP domain to which the peer node belongs is The roaming identifier sends the first data packet to the visited PMIP domain by using a mobile access gateway to which the terminal node belongs in the visited PMIP domain.
  • the mobile access gateway to which the terminal node belongs After the terminal node roams from the home PMIP domain that supports route optimization to the visited PMIP domain that supports route optimization, the mobile access gateway to which the terminal node belongs sends a proxy binding update to the mapping server, and the mapping server directly or via the mobile The access gateway sends the roaming identifier to the interworking gateway to which the terminal node belongs, and the interworking gateway notifies the roaming identifier to the home PMIP domain.
  • the first embodiment of the method for registering and updating the location of the PMIP inter-domain roaming supporting the route optimization is as follows:
  • Step 401 The terminal node performs access authentication in the visited domain.
  • the terminal initiates the access authentication process through MAG2 (in this process, the MAPS can be used for authentication, or the AAA is responsible for authentication, or other network elements are responsible for authentication), and the visited domain's MAPS2 may need to pass through the interworking gateway IGW1 and The IGW2 interacts with the home MAPS1 of the terminal node to authenticate the user, so the MAPS2 will acquire the HNP of the terminal node.
  • MAG2 the MAPS can be used for authentication, or the AAA is responsible for authentication, or other network elements are responsible for authentication
  • IGW1 interworking gateway
  • Step 402 MAG2 initiates a proxy binding update to MAPS2, and MAPS2 allocates a roaming identifier to the terminal node, and may also bind the terminal roaming identifier to the terminal HNP.
  • the roaming identifier is an identifier assigned to MAPS2, and may be in the form of an IP address. Packets with the IP address as the destination address outside the PMIP domain will be routed to the PMIP domain.
  • the IGW network element, and the IGW can determine, according to the roaming identifier, that the data packet is sent to the terminal roaming to the local area.
  • the roaming identifier is an identifier assigned to the MAPS2.
  • the IP address can be forwarded to the MAG network element accessed by the roaming user in the PMIP domain.
  • the identifier may be the IP address of the MAG or the CoA provided in the proxy binding update message. (Note: In this case, if the roaming user changes the access MAG, the roaming target i needs to be reassigned. The mouth to the attribution of i or ⁇ ⁇ off network element).
  • Step 403 The MAPS2 returns the proxy binding response to the MAG2, where the message carries the terminal HNP and the roaming identifier. At this time, the IP address of the MAPS1 needs to be carried, so that the subsequent MAG initiates a terminal location update to the MAPS1.
  • Steps 404 to 406, MAG2 initiates a terminal location update to MAPS1.
  • the message may pass through the interworking gateways IGW1 and IGW2, and the terminal roaming identifier is also carried to the MAPS1.
  • the MAPS1 binds the terminal roaming identifier to the terminal HNP.
  • Steps 407 ⁇ 409 MAPS1 sends a terminal location update response to MAG2, and the message may pass through the interworking gateways IGW1 and IGW2.
  • Step 410 The MAG2 sends a router advertisement message to the terminal, and carries the HNP of the roaming terminal. This step may be issued after completing step 403 without waiting for the terminal location update response to return.
  • the second embodiment of the method for registering and updating the location of the PMIP inter-domain roaming supporting the route optimization is as follows:
  • Step 501 The terminal node performs access authentication in the visited domain.
  • the terminal will initiate the access authentication to the MAPS2 through the MAG2, and the MAPS2 of the visited domain may need to interact with the home MAPS1 of the terminal node through the interworking gateways IGW1 and IGW2 to authenticate the user. Therefore, the MAPS2 will obtain the HNP of the terminal node.
  • Step 502 The MAG2 initiates a proxy binding update to the MAPS2.
  • the MAPS2 allocates a roaming identifier to the terminal node, and binds the terminal roaming identifier to the terminal HNP.
  • Steps 503 ⁇ 505 MAPS2 initiates a terminal location update to MAPS1. This message may pass through the interworking gateways IGW1 and IGW2, and the terminal roaming identity is also carried to MAPS1. MAPS1 will bind the terminal roaming identity with the terminal HNP. Steps 506 ⁇ 508, MAPS1 sends a terminal location update response to MAPS2, and this message may pass through the interworking gateways IGW1 and IGW2.
  • step 509 MAPS2 returns the proxy binding response to MAG2. This message can be executed after step 402
  • Step 510 The MAG2 sends a router advertisement message to the terminal, and carries the HNP of the roaming terminal.
  • the mappings constructed in each NE in the system are as follows:
  • MAPS1 MN identity, HNP, roaming identity
  • IGW1 MN identity, roaming identity, HNP
  • MAPS2 MN identity, HNP, roaming identity, CoA
  • MAG2 MN identity, HNP, CoA, roaming identity (Figure 3 only)
  • IGW2 MN identity, roaming identity
  • MAG3 HNP, roaming logo
  • IGW3 HNP, roaming identity
  • the first data packet refers to a data packet sent during the routing path determination process between the terminal node and the opposite node
  • the subsequent data packet refers to the data packet after the routing path is determined.
  • the CN is located in the MN's visit to the PMIP domain.
  • the mobile access gateway to which the peer node belongs uses the home network prefix of the terminal node to query the mapping server for the information of the mobile access gateway to which the terminal node belongs.
  • the mapping server that visits the PMIP domain queries the roaming identifier according to the home network prefix, and implements data transmission to the peer node in the visited PMIP domain.
  • the terminal node sends a first data packet to the mobile access gateway of the visited PMIP domain, and the mobile access gateway queries the mapping server of the visited PMIP domain to the right.
  • the end node location information is sent to the correspondent node by the mobile access gateway to which the correspondent node belongs. The details will be described below with reference to FIG. 6.
  • Step 601 When the terminal needs to send the first data packet to the peer node, the terminal firstly uses the first data. The package is sent to MAG2.
  • Step 602 The MAG2 queries the MAPS2 for the location information of the peer node.
  • Step 603 The MAPS2 finds that the peer node is also in the PMIP domain, and the MAPS2 returns the location information of the peer node (for example, the CoA or the current service MAG address) to the MAG2.
  • the MAPS2 finds that the peer node is also in the PMIP domain, and the MAPS2 returns the location information of the peer node (for example, the CoA or the current service MAG address) to the MAG2.
  • Step 604 The MAG2 forwards the first data packet to the MAG3 of the opposite node.
  • Step 605 The MAG3 forwards the first data to the peer node.
  • the transmission path of the subsequent data packet sent by the MN to the CN is sent by the MN to the MAG2, the MAG2 is sent to the MAG3, and the MAG3 is sent to the CN.
  • Step 606 When the peer node needs to send the first data packet to the terminal node, the peer node sends the first data packet to the MAG3.
  • Step 607 The MAG3 uses the HNP of the terminal to query the MAPS2 for the address information of the current MAG.
  • the MAPS2 queries the terminal according to the HNP of the terminal, and finds that the terminal roams to the local domain, and finally queries the location information of the terminal.
  • Step 608 The MAPS2 returns the location information of the terminal to the MAG3.
  • Step 609 The MAG3 forwards the first data packet to the MAG2.
  • Step 610 The MAG2 forwards the first data packet to the terminal node.
  • the transmission path of the subsequent first data packet sent by the CN to the MN is sent by the CN to the MAG3, the MAG3 is sent to the MAG2, and the MAG2 is sent to the CN.
  • the CN is located in the case of the MN's home PMIP domain.
  • the terminal node When the MN sends the first data packet to the opposite node, the terminal node sends a first data packet to the mobile access gateway of the visited PMIP domain, and the mobile access gateway sends the first data packet to the visited PMIP domain.
  • the mapping server queries the location information of the peer node and receives the inter-domain communication indication sent by the mapping server, the first data packet is sent to the PMIP to which the peer node belongs. area.
  • the mobile access gateway of the home PMIP domain receives the first data packet sent by the opposite node to the terminal node, and uses the home network prefix of the terminal node to the home PMIP domain.
  • the mapping server queries the location information of the terminal node, the roaming identifier is obtained, and the first data packet is sent by using the mobile access gateway to which the terminal node belongs in the visited PMIP domain as the destination network element according to the roaming identifier.
  • the mobile access gateway to which the terminal node belongs in the visited PMIP domain sends the first data packet to the terminal node.
  • the method for communication between nodes when the peer end is located in the home PMIP domain of the terminal and the specific implementation steps are as follows:
  • Step 701 When the terminal needs to send the first data packet to the opposite node, the terminal first sends the data packet to the MAG2.
  • step 702 the MAG2 queries the MAPS2 for the location information of the peer node.
  • Step 703 The MAPS2 finds that it is not in the PMIP domain according to the address information of the peer node, and the MAPS2 returns an inter-domain communication indication to the MAG2.
  • Step 704 The MAG2 forwards the first data packet to the interworking gateway IGW2.
  • Step 705 IGW2 forwards the first data packet to IGW1.
  • Step 706 The IGW1 queries the MAPS1 for location information of the peer node.
  • Step 707 The MAPS1 returns the location information of the opposite node to the IGW1.
  • Steps 708 ⁇ 709, IGW1 forwards the first data packet to MAG3, and finally forwards it to the peer node.
  • the transmission path of the subsequent data packet from MN to CN direction is MN-MAG2-IGW2-IGW1 -MAG3-CN.
  • Step 710 When the peer node needs to send the first data packet to the terminal node, the peer node sends the first data packet to the MAG3.
  • Step 711 The MAG3 queries the MAPS 1 for its location information by using the HNP of the terminal, and the MAPS 1 queries the roaming identifier of the terminal according to the terminal HNP. In step 712, the MAPS 1 returns the terminal roaming identifier to the MAG3.
  • Step 713 The MAG3 forwards the first data packet to the MAG2 according to the terminal roaming identifier.
  • Step 714 the MAG2 forwards the data packet to the terminal.
  • MAG3 and MAG2 For subsequent packets, you can use MAG3 and MAG2 to forward directly.
  • the transmission path of the subsequent data packet from CN to MN direction is CN-MAG3-MAG2-MN.
  • the terminal node When the MN sends the first data packet to the opposite node, the terminal node sends a first data packet to the mobile access gateway of the visited PMIP domain, and the mobile access gateway sends the first data packet to the visited PMIP domain.
  • the mapping server queries the peer node location information and receives the inter-domain communication indication sent by the mapping server, the first data packet is sent to the PMIP domain to which the peer node belongs.
  • the interworking gateway of the home PMIP domain receives the first data packet sent by the opposite end node to the terminal node from the interworking gateway of the PMIP domain to which the opposite end node belongs, and uses the terminal node.
  • the home network prefix queries the mapping server of the home PMIP domain to query the location information of the terminal node, the roaming identifier is obtained, and according to the roaming identifier, the mobile access gateway to which the terminal node belongs in the visited PMIP domain is The destination network element sends the first data packet to the mobile access gateway to which the terminal node belongs in the visited PMIP domain, and the mobile access gateway to which the terminal node belongs in the visited PMIP domain sets the first data packet Send to the terminal node.
  • Step 801 When the terminal needs to send the first data packet to the opposite node, the terminal first sends the first data packet to the MAG2.
  • Step 802 MAG2 queries MAPS2 for location information of the peer node.
  • Step 803 The MAPS2 finds that it is not in the PMIP domain according to the address information of the peer node, and the MAPS2 returns an inter-domain communication indication to the MAG2.
  • Step 804 The MAG2 forwards the first data packet to the interworking gateway IGW2.
  • Step 805 The IGW2 forwards the first data packet to the MAG3 through the IGW3, and finally forwards the packet to the pair. End node.
  • the transmission path of the MN to the CN packet's subsequent data packet is
  • Step 806 When the peer node needs to send the first data packet to the terminal node, the peer node will interwork the gateway IGW1.
  • Step 807 The IGW1 uses the HNP of the terminal to query the MAPS1 for its current location information, and the MAPS1 queries the terminal's roaming identifier according to the terminal HNP.
  • Step 808 The MAPS 1 returns the terminal roaming identifier to the IGW1.
  • Step 809 the IGW1 returns the terminal roaming identifier to the IGW3.
  • step 810 the IGW1 forwards the first data packet to the MAG2.
  • Step 811 The MAG2 forwards the first data packet to the terminal.
  • Subsequent packet forwarding paths will be forwarded by MAG3 to the terminal via IGW3 and MAG2.
  • the transmission path of the subsequent data packet from CN to MN direction is CN-MAG3-IGW3-MAPS2-MAG2-MNiff
  • the CN is located in another implementation in the case of a PMIP domain that supports route optimization other than the home domain of the MN and the MN visited domain.
  • the terminal node When the MN sends the first data packet to the opposite node, the terminal node sends a first data packet to the mobile access gateway of the visited PMIP domain, and the mobile access gateway sends the first data packet to the visited PMIP domain.
  • the mapping server queries the peer node location information and receives the inter-domain communication indication sent by the mapping server, the first data packet is sent to the PMIP domain to which the peer node belongs.
  • the interworking gateway of the PMIP domain to which the peer node belongs receives the first data packet sent by the opposite end node to the terminal node, and uses the terminal node via the interworking gateway of the home PMIP domain.
  • the home network prefix queries the mapping server of the home PMIP domain to query the location information of the terminal node and learns the roaming identifier, and the interworking gateway of the PMIP domain to which the peer node belongs sets the first data according to the roaming identifier Sending a packet to the mobile access gateway to which the terminal node belongs in the visited PMIP domain, and moving the terminal node in the visited PMIP domain
  • the mobile access gateway sends the first data packet to the terminal node.
  • Step 901 When the terminal needs to send the first data packet to the opposite node, the terminal first sends the first data packet to the MAG2.
  • Step 902 MAG2 queries MAPS2 for current location information of the peer node.
  • Step 903 The MAPS2 finds that it is not in the PMIP domain according to the address information of the peer node, and the MAPS2 returns an inter-domain communication indication to the MAG2.
  • Step 904 The MAG2 forwards the first data packet to the interworking gateway IGW2.
  • Step 905 The IGW2 forwards the first data packet to the MAG3 through the IGW3, and finally forwards it to the opposite node.
  • the transmission path of the MN to the CN side of the subsequent data packet is MN-MAG2-IGW2-IGW3-MAG3-CN.
  • Step 906 When the peer node needs to send the first data packet to the terminal node, the peer node sends the first data packet to the MAG3, and the MAG3 performs the terminal location query to the home network of the terminal node through the IGW3, and the message arrives at the terminal.
  • Step 907 The IGW1 uses the HNP of the terminal to query the MAPS1 for its current location information, and the MAPS1 queries the terminal's roaming identifier according to the terminal HNP.
  • Step 908 The MAPS 1 returns the terminal roaming identifier to the IGW1.
  • Step 909 the IGW1 returns the terminal roaming identifier to the IGW3.
  • Step 910 The MAG3 forwards the first data packet to the MAG2.
  • Step 911 the MAG2 forwards the first data packet to the terminal.
  • Subsequent packet forwarding paths are forwarded directly from MAG3 to IGW3 and MAG2 and ultimately forwarded to the terminal.
  • the CN is located in the case of a legacy PMIP domain of the MN other than the home domain and the visited domain.
  • the terminal node sends the first data packet to the mobile access gateway of the visited PMIP domain, where the mobile access gateway sends After the mapping server that visits the PMIP domain queries the location information of the peer node and receives the inter-domain communication indication sent by the mapping server, the first data packet is sent to the PMIP domain to which the peer node belongs.
  • the interworking gateway of the home PMIP domain receives the first data packet sent by the opposite end node to the terminal node from the local mobility anchor point of the PMIP domain to which the opposite end node belongs, and uses the terminal.
  • the home network prefix of the node queries the mapping server of the home PMIP domain to query the location information of the terminal node, the roaming identifier is obtained, and according to the roaming identifier, the mobile terminal to which the terminal node belongs in the visited PMIP domain belongs.
  • the gateway sends the first data packet to the mobile access gateway to which the terminal node belongs in the visited PMIP domain, and the mobile access gateway to which the terminal node belongs in the visited PMIP domain The data packet is sent to the terminal node.
  • Step 1001 When the terminal needs to send the first data packet to the opposite node, the terminal first sends the first data packet to the MAG2.
  • step 1002 the MAG2 queries the MAPS2 for the current location information of the peer node.
  • Step 1003 The MAPS2 finds that it is not in the PMIP domain according to the address information of the peer node, and the MAPS2 returns an inter-domain communication indication to the MAG2.
  • Step 1004 The MAG2 forwards the first data packet to the interworking gateway IGW2.
  • step 1005 the IGW2 forwards the first data packet to the LMA3 of the opposite node, and the LMA3 sends the first data packet to the MAG3 through the tunnel, and finally forwards it to the opposite node.
  • the transmission path of the MN to the CN side of the subsequent data packet is MN-MAG2-IGW2-IGW3-MAG3-CN.
  • Step 1006 When the peer node needs to send the first data packet to the terminal node, the peer node sends the first data packet to the MAG3, and the MAG3 uses the tunnel to forward the first data packet to the LMA3, and then the LMA3 sends the terminal to the terminal.
  • the domain was intercepted by IGW1.
  • Step 1007 The IGW1 uses the HNP of the terminal to query the MAPS1 for its current location information, and the MAPS 1 queries the terminal's roaming identifier according to the terminal HNP.
  • step 1008 the MAPS 1 returns the terminal roaming identity to the IGW1.
  • IGW1 may return the terminal roaming identity to the LMA, but the LMA will ignore the message because it cannot parse the message.
  • step 1010 the IGW1 forwards the first data packet to the MAG2.
  • Step 1011 MAG2 forwards the first data packet to the terminal.
  • Step 1012 The subsequent data packet forwarding path still needs to pass through the interworking gateway of the terminal home network.
  • IGW1 forwards and then arrives at MAG2. After receiving the subsequent data packet sent by the peer node to the terminal node, the local mobility anchor of the PMIP domain to which the peer node belongs is forwarded to the visited PMIP domain via the home PMIP domain.
  • the terminal node switches from the source mobile access gateway of the visited PMIP domain to the target mobile access gateway, and the mapping server of the visited PMIP domain sends the described via the interworking gateway of the visited PMIP domain and the home PMIP domain.
  • the mapping server notifying the address of the target mobile access gateway to the mobile access gateway of the home PMIP domain, and the mobile access gateway will The address of the target mobile access gateway is notified to the interworking gateway of the home PMIP domain, and the interworking gateway notifies the address of the target mobile access gateway to the mobile access gateway to which the correspondent node belongs.
  • Step 1101 The terminal is switched from MAG2 to MAG4 in the visited domain.
  • MAPS2 may send terminal location information (for example, the address of the new CoA and/or MAG4) to IGW1 and MAPS 1.
  • MAPS1 updates the terminal location information (for example: the address of the new CoA and/or MAG4) to MAG1.
  • the MAG1 updates the terminal location information (e.g., the address of the new CoA and/or MAG4) to the IGW1.
  • the terminal location information e.g., the address of the new CoA and/or MAG4
  • the IGW1 finally updates the terminal location information (for example: the address of the new CoA and/or MAG4) to the MAG3.
  • the terminal location information for example: the address of the new CoA and/or MAG4
  • the node communication system when roaming between PMIP domains corresponding to the above method includes a terminal node, a peer node, a home PMIP domain to which the terminal node belongs, and a terminal node to which the terminal node belongs.
  • the mapping server provided in the solution includes a roaming identity processing module.
  • the roaming identifier processing module is configured to allocate, to the terminal node, location information indicating that the terminal node is in the visited PMIP domain, when the mapping server is a mapping server in a visiting PMIP domain that belongs to the terminal node after roaming as a terminal node.
  • the roaming identifier is bound to the home network prefix of the terminal node, and the roaming identifier is also notified to the home PMIP domain.
  • the roaming identifier processing module is configured to: when the mapping server is used as a mapping server in a home PMIP domain of the terminal node, after receiving a request for querying the location of the terminal node by using a home network prefix of the terminal node Providing the roaming identifier to the requesting party.
  • This solution provides a solution for communication problems when nodes roam between PMIP domains.

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Abstract

一种在PMIP域间漫游时的节点通信方法及通信系统,此方法包括:终端节点MN从支持路由优化的归属PMIP域漫游到支持路由优化的拜访PMIP域后,所述拜访PMIP域为MN分配表示MN在所述拜访PMIP域中位置信息的漫游标识并将所述漫游标识与MN的家乡网络前缀绑定,还将此漫游标识通知至所述归属PMIP域,所述归属PMIP域将MN的家乡网络前缀和所述漫游标识绑定;所述对端节点至MN的首数据包传输过程中,所述归属PMIP域根据MN的家乡网络前缀查询到所述漫游标识,所述对端节点所属的PMIP域根据所述漫游标识以所述拜访PMIP域中MN所属的移动接入网关为目的网元将所述首数据包发送至所述拜访PMIP域。本方案为节点在PMIP域间漫游时的通信问题提供了解决方案。

Description

一种在 PMIP域间漫游时的节点通信方法及通信系统
技术领域
本发明涉及通信领域, 尤其涉及一种在 PMIP域间漫游时的节点通信方 法及通信系统。
背景技术
传输控制协议 /因特网互联协议 ( Transmission Control Protocol/Internet Protocol, 简称 TCP/IP ) , 在初始设计时未考虑终端会发生拓朴位置改变的情 况, 即 TCP/IP协议本身不支持移动性。 在传统的 TCP/IP网络环境中, IP为 因特网 (Internet)提供了路由功能, 它给所有节点 (包括主机和路由器)都分 配了逻辑地址, 即 IP地址, 且每台主机的各个端口都分配一个 IP地址。 IP 地址包括网络前缀和主机部分, 同一条链路上的所有主机的 IP地址通常有相 同的网络前缀和不同的主机部分。 这使得 IP可以依据目的节点的 IP地址的 网络前缀部分来进行路由选择, 从而使路由器秩序保存一条简单的网络前缀 路由, 而不必为每台主机保存一条单独的路由。 在这种情况下, 由于釆用了 网络前缀路由, 因此当节点从一条链路切换到另一条链路而没有改变其 IP地 址时, 该节点则不可能在新链路上接收到数据报文, 从而也就无法与其他节 点进行通信。
随着用户对移动性和信息的需求急剧上升, 越来越多的人希望在移动的 过程中高速地接入互联网, 获取急需的信息, 完成想做的事情。 因此, 移动 互联网成为未来互联网的发展方向,但是传统 TCP/IP协议不支持移动性的缺 陷, 使得对终端节点的移动性管理成为移动互联网面对的一大难题。
为了解决移动性管理问题, 业界比较流行的移动性管理技术, 如, 移动 IP ( Mobile IP, MIP ) 、 代理移动 IP ( Proxy MIP , PMIP )等, 均通过引入 固定锚点 (Anchor ) 的方式来支持终端的移动性。 例如, MIP协议使用家乡 代理(Home agent, HA )作为锚点、 PMIP协议使用本地移动性锚点 (Local Mobility Anchor, LMA )作为错点。 图 1所示的是 PMIP协议的逻辑架构,包括终端节点( Mobile Node, MN )、 对端节点( Correspondent Node, CN )、移动接入网关( Mobile Access Gateway, MAG ) 以及本地移动锚点 (Local Mobility Anchor, LMA)。 其中 CN可以是固 定节点, 也可以是移动节点, 即具有相应的 MAG和 LMA。 MAG是 MN的 第一跳路由器, 其主要作用包括在 MN接入时为其分配转交地址(Care of Address, CoA )以及代替 MN执行与 MN的锚点 LMA之间的 PMIP绑定( PMIP Binding )。LMA作为 MN的锚点,其主要作用包括为 MN分配家乡地址( Home of Address, HoA )以及处理上述 PMIP绑定。 MAG与 LMA之间执行的 PMIP 绑定的主要目的是让双方均获知对方的地址、 即上述 CoA和 HoA, 并将绑定 关系保存在本地。 此外, 在执行 PMIP的绑定过程中, 还为 MN在 MAG和 LMA之间建立了一条双向隧道。值得说明的是, MN最后获取到的 IP地址是 LMA为其分配的 HoA。 在通常的网络部署中, MAG—般位于拓朴较低的位 置, 比如位于城域网的边缘; 而 LMA则一般位于拓朴较高的位置, 比如省干 网的核心部分。 MAG与 LMA之间实际上往往通过多跳路由器相连。
为了使得数据包传输的路径达到最优, 当终端节点和对端节点均在同一 个 PMIP域之内的时候,终端节点或对端节点可以使用本端的 MAG从其他网 元获取到另外一端的当前服务 MAG,从而在两个 MAG间建立一条直接的链 路, 而不需要将数据包再路由到 LMA, 大大减少了路由的迂回问题。 为了与 传统的 PMIP域相区分, 上述域被叫作支持路由优化的 PMIP域。
PMIP域间节点漫游的系统架构如图 2所示, 所述 PMIP域可以分为支持 路由优化的 PMIP域和不支持路由优化的 PMIP域即传统 PMIP域。对于支持 路由优化的 PMIP域,除了传统的网元 MAG外,包含一个映射服务器 (Mapping Server, MAPS),主要进行节点位置管理以及地址映射关系维护等工作。 另外还 包含一个或多个用于与其他 PMIP 域互通的互通网关(Interworking GatewayJGW), 其主要的功能包括与其他支持路由优化的 PMIP域之间进行 信令交互,同时也是本 PMIP域与其他 PMIP域之间的数据出口,具体实现上, 可以在域的边界设置多个互通网关, 针对目标节点在不同域的情况下, 根据 路由最优原则选择不同的互通网关。 另外, 互通网关可以与边界路由器合设, 也可以是一个单独的设备。 为了保证外域的数据包能够到达互通网关, 互通 网关需要对外广播其所属的 ΗθΑ/家乡网络前缀。
目前的 PMIP网络架构都是基于终端节点在同一个 PMIP域中相同本地移 动锚点下的移动,而终端从一个 PMIP域漫游到另外一个 PMIP域的方法还没 有进行定义, 特别是终端在支持路由优化的 PMIP域之间进行漫游的路由优 化的方法。
发明内容
本发明要解决的技术问题是提供一种在 PMIP域间漫游时的节点通信方 法及通信系统, 解决节点在 PMIP域间漫游时的通信问题。
为了解决上述技术问题, 本发明提供了一种在 PMIP域间漫游时的节点 通信方法, 其中, 终端节点从支持路由优化的归属 PMIP域漫游到支持路由 优化的拜访 PMIP域后,所述拜访 PMIP域为所述终端节点分配表示所述终端 节点在所述拜访 PMIP域中位置信息的漫游标识并将所述漫游标识与所述终 端节点的家乡网络前缀绑定, 还将此漫游标识通知至所述归属 PMIP域, 所 述归属 PMIP域将所述终端节点的家乡网络前缀和所述漫游标识绑定; 所述 对端节点至所述终端节点的首数据包传输过程中, 所述归属 PMIP域根据所 述终端节点的家乡网络前缀查询到所述漫游标识,所述对端节点所属的 PMIP 域根据所述漫游标识以所述拜访 PMIP域中所述终端节点所属的移动接入网 关为目的网元将所述首数据包发送至所述拜访 PMIP域。
优选地, 上述方法还可以具有以下特点: 终端节点从支持路由优化的归 属 PMIP域漫游到支持路由优化的拜访 PMIP域后,所述终端节点所属的移动 接入网关向映射服务器发送代理绑定更新, 所述映射服务器直接或经由所述 移动接入网关将所述漫游标识发送至所述终端节点所属的互通网关, 所述互 通网关将所述漫游标识通知至所述归属 PMIP域。
优选地, 上述方法还可以具有以下特点: 所述拜访 PMIP域的映射服务 器将所述终端节点的家乡网络前缀和所述漫游标识绑定;
所述对端节点位于所述拜访 PMIP域时, 所述对端节点向终端节点发送 首数据包过程中, 所述对端节点所属的移动接入网关使用所述终端节点的家 乡网络前缀向映射服务器查询所述终端节点所属移动接入网关的信息, 所述 拜访 PMIP域的映射服务器根据所述家乡网络前缀查询到所述漫游标识, 在 所述拜访 PMIP域内实现向对端节点的数据发送。
优选地, 上述方法还可以具有以下特点: 所述对端节点位于所述拜访 PMIP域时, 所述终端节点向对端节点发送首数据包过程中, 所述终端节点向 所述拜访 PMIP域的移动接入网关发送首数据包, 此移动接入网关向所述拜 访 PMIP域的映射服务器查询到对端节点位置信息, 将所述首数据包经由所 述对端节点所属的移动接入网关发送至所述对端节点。
优选地, 上述方法还可以具有以下特点: 所述对端节点位于所述拜访 PMIP域之外的 PMIP域时, 所述终端节点向对端节点发送首数据包过程中, 所述终端节点向所述拜访 PMIP域的移动接入网关发送首数据包, 此移动接 入网关向所述拜访 PMIP域的映射服务器查询对端节点位置信息并收到所述 映射服务器发送的域间通信指示后, 将所述首数据包发送至所述对端节点所 属的 PMIP域。
优选地, 上述方法还可以具有以下特点:
所述对端节点位于所述归属 PMIP域时,所述归属 PMIP域的移动接入网 关收到所述对端节点发往所述终端节点的首数据包后 , 使用所述终端节点的 家乡网络前缀向所述归属 PMIP域的映射服务器查询所述终端节点的位置信 息时获知所述漫游标识, 根据所述漫游标识以所述拜访 PMIP域中所述终端 节点所属的移动接入网关为目的网元将所述首数据包发送至所述拜访 PMIP 域中所述终端节点所属的移动接入网关, 所述拜访 PMIP域中所述终端节点 所属的移动接入网关将所述首数据包发送至所述终端节点。
优选地, 上述方法还可以具有以下特点: 所述对端节点位于所述归属 PMIP域和所述拜访 PMIP域之外的其它支持路由优化的 PMIP域时 , 所述归 属 PMIP域的互通网关从所述对端节点所属 PMIP域的互通网关收到所述对端 节点发往所述终端节点的首数据包后, 使用所述终端节点的家乡网络前缀向 所述归属 PMIP域的映射服务器查询所述终端节点的位置信息时获知所述漫 游标识, 根据所述漫游标识以所述拜访 PMIP域中所述终端节点所属的移动 接入网关为目的网元将所述首数据包发送至所述拜访 PMIP域中所述终端节 点所属的移动接入网关, 所述拜访 PMIP域中所述终端节点所属的移动接入 网关将所述首数据包发送至所述终端节点。
优选地, 上述方法还可以具有以下特点: 所述对端节点位于所述归属
PMIP域和所述拜访 PMIP域之外的支持路由优化的 PMIP域时 , 所述对端节 点所属的 PMIP域的互通网关收到所述对端节点发往所述终端节点的首数据 包后, 经由所述归属 PMIP域的互通网关使用所述终端节点的家乡网络前缀 向所述归属 PMIP域的映射服务器查询所述终端节点的位置信息并获知所述 漫游标识, 所述对端节点所属的 PMIP域的互通网关根据所述漫游标识将所 述首数据包发送至所述拜访 PMIP域中所述终端节点所属的移动接入网关, 所述拜访 PMIP域中所述终端节点所属的移动接入网关将所述首数据包发送 至所述终端节点。
优选地, 上述方法还可以具有以下特点: 所述归属 PMIP域的互通网关 向所述归属 PMIP域的映射服务器查询所述终端节点的位置信息时获知所述 漫游标识后, 将所述漫游标识通知至所述对端节点所属 PMIP域中所述对端 节点所属的互通网关; 所述对端节点所属的互通网关收到所述对端节点发往 所述终端节点的后续数据包后, 直接发送至所述拜访 PMIP域。
优选地, 上述方法还可以具有以下特点:
所述对端节点位于所述归属 PMIP域和所述拜访 PMIP域之外的传统 PMIP域时 , 所述归属 PMIP域的互通网关从所述对端节点所属 PMIP域的本 地移动锚点收到所述对端节点发往所述终端节点的首数据包后, 使用所述终 端节点的家乡网络前缀向所述归属 PMIP域的映射服务器查询所述终端节点 的位置信息时获知所述漫游标识, 根据所述漫游标识以所述拜访 PMIP域中 所述终端节点所属的移动接入网关为目的网元将所述首数据包发送至所述拜 访 PMIP域中所述终端节点所属的移动接入网关,所述拜访 PMIP域中所述终 端节点所属的移动接入网关将所述首数据包发送至所述终端节点。
优选地, 上述方法还可以具有以下特点:
所述对端节点所属 PMIP域的本地移动锚点收到所述对端节点发往所述 终端节点的后续数据包后, 经由所述归属 PMIP域转发至所述拜访 PMIP域。 优选地, 上述方法还可以具有以下特点:
所述终端节点从所述拜访 PMIP域的源移动接入网关切换到目标移动接 入网关, 所述拜访 PMIP域的映射服务器经由所述拜访 PMIP域和所述归属 PMIP域的互通网关将所述目标移动接入网关的地址通知至所述归属 PMIP域 的映射服务器, 此映射服务器将所述目标移动接入网关的地址通知至所述归 属 PMIP域的移动接入网关, 此移动接入网关将所述目标移动接入网关的地 址通知至所述归属 PMIP域的互通网关, 此互通网关将所述目标移动接入网 关的地址通知至所述对端节点所属的移动接入网关。
为了解决上述技术问题, 本发明还提供了一种在 PMIP域间漫游时的节 点通信系统, 其中, 包括终端节点、 对端节点、 终端节点所属的支持路由优 化的归属 PMIP域、终端节点所属的支持路由优化的拜访 PMIP域、所述对端 节点所属的 PMIP域;
所述拜访 PMIP域设置为:在终端节点从支持路由优化的归属 PMIP域漫 游到支持路由优化的拜访 PMIP域后, 为所述终端节点分配表示所述终端节 点在所述拜访 PMIP域中位置信息的漫游标识并将所述漫游标识与所述终端 节点的家乡网络前缀绑定, 还将此漫游标识通知至所述归属 PMIP域;
所述归属 PMIP域设置为: 将所述终端节点的家乡网络前缀和所述漫游 标识绑定; 还用于在所述对端节点至所述终端节点的首数据包传输过程中, 才艮据所述终端节点的家乡网络前缀查询到所述漫游标识;
所述对端节点所属的 PMIP域还设置为: 根据所述漫游标识以所述拜访
PMIP域中所述终端节点所属的移动接入网关为目的网元将所述首数据包发 送至所述拜访 PMIP域。
优选地, 上述系统还可以具有以下特点:
所述拜访 PMIP域包括映射服务器; 所述归属 PMIP域包括映射服务器; 所述拜访 PMIP域的映射服务器设置为: 为所述终端节点分配表示所述 终端节点在所述拜访 PMIP域中位置信息的漫游标识并将所述漫游标识与所 述终端节点的家乡网络前缀绑定;
所述归属 PMIP域的映射服务器设置为:从所述拜访 PMIP域获知所述终 端节点的漫游标识后, 并将所述漫游标识与所述终端节点的家乡网络前缀绑 定。
优选地, 上述系统还可以具有以下特点: 所述归属 PMIP域包括移动接 入网关; 所述拜访 PMIP域包括移动接入网关;
所述归属 PMIP域的移动接入网关设置为: 收到所述对端节点发往所述 终端节点的首数据包后,使用所述终端节点的家乡网络前缀向所述归属 PMIP 域的映射服务器查询所述终端节点的位置信息时获知所述漫游标识, 并将所 述首数据包经由所述归属 PMIP域的互通网关发送至所述拜访 PMIP域的移动 接入网关。
优选地, 上述系统还可以具有以下特点:
所述归属 PMIP域包括互通网关;
所述归属 PMIP域的互通网关设置为: 收到所述对端节点发往所述终端 节点的首数据包后, 使用所述终端节点的家乡网络前缀向所述归属 PMIP域 的映射服务器查询所述终端节点的位置信息时获知所述漫游标识, 并将所述 首数据包发送至所述拜访 PMIP域的互通网关。
优选地, 上述系统还可以具有以下特点:
所述归属 PMIP域的互通网关还设置为:从所述归属 PMIP域的映射服务 器获知所述漫游标识后, 将所述漫游标识通知至所述拜访 PMIP域。
优选地, 上述系统还可以具有以下特点:
所述对端节点所属 PMIP域包括互通网关;
所述对端节点所属 PMIP域的互通网关设置为:收到所述对端节点向所述 终端节点发送的首数据包后, 使用所述终端节点的家乡网络前缀向所述归属 PMIP域查询所述终端节点的位置信息时获知所述漫游标识后,根据所述漫游 标识将所述首数据包发送至所述拜访域。
为了解决上述技术问题, 本发明还提供了一种映射服务器, 其中, 所述 映射服务器包括漫游标识处理模块; 所述漫游标识处理模块设置为: 在所述 映射服务器作为终端节点漫游后所属的拜访 PMIP域中的映射服务器时, 为 所述终端节点分配表示所述终端节点在所述拜访 PMIP域中位置信息的漫游 标识并将所述漫游标识与所述终端节点的家乡网络前缀绑定, 还将此漫游标 识通知至所述归属 PMIP域。
为了解决上述技术问题, 本发明还提供了一种映射服务器, 其中, 所述 映射服务器包括漫游标识处理模块; 所述漫游标识处理模块设置为: 在所述 映射服务器作为终端节点的归属 PMIP域中的映射服务器时, 收到使用所述 终端节点的家乡网络前缀向映射服务器查询所述终端节点位置的请求后, 向 请求方提供所述漫游标识。
本方案为节点在 PMIP域间漫游时的通信问题提供了解决方案。 附图概述
图 1为 PMIP系统的架构体系示意图;
图 2为 PMIP域间节点漫游的系统架构图;
图 3是在 PMIP域间漫游时的节点通信方法的示意图;
图 4为终端在支持路由优化的 PMIP域间漫游的注册及位置更新的方法 实施方式一的示意图;
图 5为终端在支持路由优化的 PMIP域间漫游的注册及位置更新的方法 实施方式二的示意图;
图 6为对端位于终端的拜访 PMIP域时节点间通信的路由优化方法示意 图;
图 7为对端位于终端的归属 PMIP域时节点间通信的路由优化方法示意 图;
图 8为对端位于其他支持路由优化的 PMIP域时节点间通信的路由优化 方法示意图;
图 9为对端位于其他支持路由优化的 PMIP域时节点间通信的路由优化 方法示意图;
图 10为对端位于传统 PMIP域时节点间通信的路由优化方法示意图; 图 11为终端在拜访域发生跨 MAG切换后地址信息更新的方法示意图。 本发明的较佳实施方式
如图 3所示, 在 PMIP域间漫游时的节点通信方法包括:
终端节点从支持路由优化的归属 PMIP域漫游到支持路由优化的拜访 PMIP域后, 所述拜访 PMIP域为所述终端节点分配表示所述终端节点在所述 拜访 PMIP域中位置信息的漫游标识并将所述漫游标识与所述终端节点的家 乡网络前缀绑定, 还将此漫游标识通知至所述归属 PMIP域, 所述归属 PMIP 域将所述终端节点的家乡网络前缀和所述漫游标识绑定;
所述对端节点至所述终端节点的首数据包传输过程中, 所述归属 PMIP 域根据所述终端节点的家乡网络前缀查询到所述漫游标识, 所述对端节点所 属的 PMIP域根据所述漫游标识以所述拜访 PMIP域中所述终端节点所属的移 动接入网关为目的网元将所述首数据包发送至所述拜访 PMIP域。
终端节点从支持路由优化的归属 PMIP域漫游到支持路由优化的拜访 PMIP域后,所述终端节点所属的移动接入网关向映射服务器发送代理绑定更 新, 所述映射服务器直接或经由所述移动接入网关将所述漫游标识发送至所 述终端节点所属的互通网关, 所述互通网关将所述漫游标识通知至所述归属 PMIP域。 下面通过图 4和图 5详细说明。
参考图 4终端在支持路由优化的 PMIP域间漫游的注册及位置更新的方 法实施例一, 具体实现步骤如下:
步骤 401 , 终端节点在拜访域进行接入鉴权。
终端会通过 MAG2发起接入鉴权流程(此过程中可以由 MAPS负责鉴权, 或者通过 AAA 负责鉴权, 或者由其它网元负责鉴权), 而拜访域的 MAPS2 可能需要通过互通网关 IGW1和 IGW2与终端节点的归属 MAPS1进行交互对 用户进行认证, 因此 MAPS2将会获取到终端节点的 HNP。
步骤 402 , MAG2向 MAPS2发起代理绑定更新, MAPS2为终端节点分 配漫游标识, 还可以将此终端漫游标识与终端 HNP进行绑定。
此漫游标识为 MAPS2分配的一个标识, 形式可以是一个 IP地址, 在此 PMIP域之外以此 IP地址为目的地址的数据包将会被路由至此 PMIP域的 IGW网元, 且 IGW可根据此漫游标识判断出此数据包是发往漫游到本域的 终端的。
漫游标识为 MAPS2分配的一个标识, 形式可以是一个 IP地址, 以此 IP 地址为目的地址的数据包将会被路由至此 PMIP域中漫游用户所接入的 MAG 网元。 此标识可以是 MAG的 IP地址, 也可以是代理绑定更新消息中提供的 CoA (注: 在此情况下, 若漫游用户改变了接入的 MAG, 则需要重新分配漫 游标 i只 , 并通 口到归属 i或的^ ]关网元)。
步骤 403 , MAPS2将代理绑定响应返回给 MAG2 , 此消息中会携带终端 HNP、漫游标识。此时还需携带 MAPS1的 IP地址,以便后续 MAG向 MAPS1 发起终端位置更新。
步骤 404 ~ 406, MAG2向 MAPS1发起终端位置更新, 此消息可能会经 过互通网关 IGW1和 IGW2,同时终端漫游标识也会被携带到 MAPS1 , MAPS1 会将此终端漫游标识和终端 HNP进行绑定。
步骤 407 ~ 409, MAPS1向 MAG2发送终端位置更新响应, 此消息可能 会经过互通网关 IGW1和 IGW2。
步骤 410, MAG2向终端发送路由器通告消息, 携带漫游终端的 HNP。 此步骤可能在完成步骤 403之后发出, 不需要等待终端位置更新响应返回。
参考图 5终端在支持路由优化的 PMIP域间漫游的注册及位置更新的方 法实施例二, 具体实现步骤如下:
步骤 501 , 终端节点在拜访域进行接入鉴权。
终端会通过 MAG2向 MAPS2发起接入鉴权, 而拜访域的 MAPS2可能 需要通过互通网关 IGW1和 IGW2与终端节点的归属 MAPS1进行交互对用户 进行认证, 因此 MAPS2将会获取到终端节点的 HNP。
步骤 502, MAG2向 MAPS2发起代理绑定更新, 此时 MAPS2会为终端 节点分配一个漫游标识, 同时会将此终端漫游标识与终端 HNP进行绑定。
步骤 503 ~ 505, MAPS2向 MAPS1发起终端位置更新, 此消息可能会经 过互通网关 IGW1和 IGW2,同时终端漫游标识也会被携带到 MAPS1 , MAPS1 会将此终端漫游标识和终端 HNP进行绑定。 步骤 506 ~ 508, MAPS1向 MAPS2发送终端位置更新响应, 此消息可能 会经过互通网关 IGW1和 IGW2。
步骤 509, MAPS2将代理绑定响应返回给 MAG2。 此消息可在步骤 402 后执行
步骤 510, MAG2向终端发送路由器通告消息, 携带漫游终端的 HNP。 终端完成 PMIP域间漫游的注册及位置更新后, 系统中各网元中构造的 映射关系如下:
Case3:
MAPS1 : MN标识、 HNP、 漫游标识
IGW1 : MN标识, 漫游标识, HNP
MAPS2: MN标识、 HNP、 漫游标识、 CoA
MAG2: MN标识、 HNP、 CoA、 漫游标识(仅图 3 )
IGW2: MN标识, 漫游标识
MAG3: HNP, 漫游标识
IGW3: HNP, 漫游标识
下文方法描述中, 首数据包是指终端节点与对端节点之间进行路由路径 确定过程中发送的数据包, 后续数据包是指确定路由路径后的数据包。
CN位于 MN的拜访 PMIP域的情况。
所述对端节点向终端节点发送首数据包过程中, 对端节点所属的移动接 入网关使用所述终端节点的家乡网络前缀向映射服务器查询所述终端节点所 属移动接入网关的信息, 所述拜访 PMIP域的映射服务器根据所述家乡网络 前缀查询到所述漫游标识, 在所述拜访 PMIP域内实现向对端节点的数据发 送。
所述终端节点向对端节点发送首数据包过程中, 终端节点向所述拜访 PMIP域的移动接入网关发送首数据包,此移动接入网关向所述拜访 PMIP域 的映射服务器查询到对端节点位置信息, 将所述首数据包经由所述对端节点 所属的移动接入网关发送至所述对端节点。 下面通过图 6进行详细说明。
参考图 6本发明对端位于终端的拜访 PMIP域时节点间通信的路由优化 方法, 具体实现步骤如下: 步骤 601 , 当终端需要将首数据包发送到对端节点时, 终端首先会将首 数据包发送给 MAG2。
步骤 602, MAG2会向 MAPS2查询对端节点的位置信息。
步骤 603 , MAPS2发现对端节点也在本 PMIP域内, 则 MAPS2会将对 端节点的位置信息 (例如: CoA或当前服务 MAG地址)返回给 MAG2。
步骤 604 , MAG2将首数据包转发给对端节点的 MAG3。
步骤 605, MAG3将首数据转发给对端节点。
MN向 CN发送的后续数据包的传输路径为 MN发送至 MAG2, MAG2 发送至 MAG3 , MAG3发送至 CN。
步骤 606, 当对端节点需要向终端节点发送首数据包时, 对端节点会将 首数据包发送给 MAG3。
步骤 607 , MAG3会使用终端的 HNP向 MAPS2查询其当前 MAG的地 址信息, MAPS2会根据终端的 HNP进行查询, 发现是漫游到本域的终端, 并最终查询到终端的位置信息。
步骤 608 , MAPS2将终端的位置信息返回给 MAG3。
步骤 609 , MAG3将首数据包转发给 MAG2。
步骤 610, MAG2将首数据包转发给终端节点。
CN向 MN发送的后续首数据包的传输路径为 CN发送至 MAG3 , MAG3 发送至 MAG2, MAG2发送至 CN。
CN位于 MN的归属 PMIP域的情况下。
MN向 CN方向, 终端节点向对端节点发送首数据包过程中, 所述终端 节点向所述拜访 PMIP域的移动接入网关发送首数据包, 此移动接入网关向 所述拜访 PMIP域的映射服务器查询对端节点位置信息并收到所述映射服务 器发送的域间通信指示后,将所述首数据包发送至所述对端节点所属的 PMIP 域。
CN向 MN方向,所述归属 PMIP域的移动接入网关收到所述对端节点发 往所述终端节点的首数据包后, 使用所述终端节点的家乡网络前缀向所述归 属 PMIP域的映射服务器查询所述终端节点的位置信息时获知所述漫游标识 , 根据所述漫游标识以所述拜访 PMIP域中所述终端节点所属的移动接入网关 为目的网元将所述首数据包发送至所述拜访 PMIP域中所述终端节点所属的 移动接入网关, 所述拜访 PMIP域中所述终端节点所属的移动接入网关将所 述首数据包发送至所述终端节点。
参考图 7对端位于终端的归属 PMIP域时节点间通信方法, 具体实现步 骤如下:
步骤 701 , 当终端需要将首数据包发送到对端节点时, 终端首先会将数 据包发送给 MAG2。
步骤 702, MAG2会向 MAPS2查询对端节点的位置信息。
步骤 703 , MAPS2根据对端节点的地址信息发现其不在本 PMIP域内, 则 MAPS2会向 MAG2返回域间通信指示。
步骤 704 , MAG2将首数据包向互通网关 IGW2转发。
步骤 705 , IGW2将首数据包转发到 IGW1。
步骤 706, IGW1向 MAPS1查询对端节点的位置信息。
步骤 707, MAPS1将对端节点的位置信息返回给 IGW1。
步骤 708 ~ 709, IGW1将首数据包转发给 MAG3 , 并最终转发到对端节 点。
MN 至 CN 方 向 的 后 续 数 据 包 的 传 输 路 径 为 MN-MAG2-IGW2-IGW1 -MAG3-CN。
步骤 710, 当对端节点需要向终端节点发送首数据包时, 对端节点会将 首数据包发送给 MAG3。
步骤 711 , MAG3使用终端的 HNP向 MAPS 1查询其位置信息, MAPS 1 根据终端 HNP查询到终端的漫游标识。 步骤 712, MAPS 1将终端漫游标识返回给 MAG3。
步骤 713 , MAG3根据终端漫游标识将首数据包转发给 MAG2。
步骤 714, MAG2将数据包转发到终端。
对于后续的数据包均可以使用 MAG3和 MAG2直接转发。 CN至 MN方 向的后续数据包的传输路径为 CN-MAG3-MAG2-MN。
CN位于除 MN的归属域和 MN的拜访域之外的支持路由优化的 PMIP 域的情况下的一种实现方式。
MN向 CN方向, 终端节点向对端节点发送首数据包过程中, 所述终端 节点向所述拜访 PMIP域的移动接入网关发送首数据包, 此移动接入网关向 所述拜访 PMIP域的映射服务器查询对端节点位置信息并收到所述映射服务 器发送的域间通信指示后,将所述首数据包发送至所述对端节点所属的 PMIP 域。
CN向 MN方向,所述归属 PMIP域的互通网关从所述对端节点所属 PMIP 域的互通网关收到所述对端节点发往所述终端节点的首数据包后, 使用所述 终端节点的家乡网络前缀向所述归属 PMIP域的映射服务器查询所述终端节 点的位置信息时获知所述漫游标识, 根据所述漫游标识以所述拜访 PMIP域 中所述终端节点所属的移动接入网关为目的网元将所述首数据包发送至所述 拜访 PMIP域中所述终端节点所属的移动接入网关,所述拜访 PMIP域中所述 终端节点所属的移动接入网关将所述首数据包发送至所述终端节点。
参考图 8对端位于其他支持路由优化的 PMIP域时节点间通信的路由优 化方法, 具体实现步骤如下:
步骤 801 , 当终端需要将首数据包发送到对端节点时, 终端首先会将首 数据包发送给 MAG2。
步骤 802, MAG2会向 MAPS2查询对端节点的位置信息。
步骤 803 , MAPS2根据对端节点的地址信息发现其不在本 PMIP域内, 则 MAPS2会向 MAG2返回域间通信指示。
步骤 804 , MAG2将首数据包向互通网关 IGW2转发。
步骤 805, IGW2将首数据包经过 IGW3转发到 MAG3 , 并最终转发给对 端节点。
MN 向 CN 方 向 的 后 续 数 据 包 的 传 输 路 径 为
MN-MAG2-IGW2-IGW3-MAG3-CN。
步骤 806, 当对端节点需要向终端节点发送首数据包时, 对端节点会将 互通网关 IGW1。
步骤 807 , IGW1使用终端的 HNP向 MAPS1查询其当前位置信息, MAPS1 根据终端 HNP查询到终端的漫游标识。
步骤 808 , MAPS 1将终端漫游标识返回给 IGW1。
步骤 809, IGW1将终端漫游标识返回给 IGW3。
步骤 810, IGW1将首数据包转发给 MAG2。
步骤 811 , MAG2将首数据包转发给终端。
后续的数据包转发路径将由 MAG3经过 IGW3和 MAG2转发给终端。 CN 向 MN 方 向 的 后 续 数 据 包 的 传 输 路 径 为 CN-MAG3-IGW3-MAPS2-MAG2-MN„
CN位于除 MN的归属域和 MN拜访域之外的支持路由优化的 PMIP域 的情况下的另一种实现方式。
MN向 CN方向, 终端节点向对端节点发送首数据包过程中, 所述终端 节点向所述拜访 PMIP域的移动接入网关发送首数据包, 此移动接入网关向 所述拜访 PMIP域的映射服务器查询对端节点位置信息并收到所述映射服务 器发送的域间通信指示后,将所述首数据包发送至所述对端节点所属的 PMIP 域。
CN向 MN方向,所述对端节点所属的 PMIP域的互通网关收到所述对端 节点发往所述终端节点的首数据包后, 经由所述归属 PMIP域的互通网关使 用所述终端节点的家乡网络前缀向所述归属 PMIP域的映射服务器查询所述 终端节点的位置信息并获知所述漫游标识, 所述对端节点所属的 PMIP域的 互通网关根据所述漫游标识将所述首数据包发送至所述拜访 PMIP域中所述 终端节点所属的移动接入网关, 所述拜访 PMIP域中所述终端节点所属的移 动接入网关将所述首数据包发送至所述终端节点。
参考图 9对端位于其他支持路由优化的 PMIP域时节点间通信的路由优 化方法, 具体实现步骤如下:
步骤 901 , 当终端需要将首数据包发送到对端节点时, 终端首先会将首 数据包发送给 MAG2。
步骤 902 , MAG2会向 MAPS2查询对端节点的当前位置信息。
步骤 903 , MAPS2根据对端节点的地址信息发现其不在本 PMIP域内, 则 MAPS2会向 MAG2返回域间通信指示。
步骤 904 , MAG2将首数据包向互通网关 IGW2转发。
步骤 905 , IGW2将首数据包经过 IGW3转发到 MAG3 , 并最终转发到对 端节点。
MN 向 CN 方 向 的 后 续 数 据 包 的 传 输 路 径 为 MN-MAG2-IGW2-IGW3-MAG3-CN。
步骤 906, 当对端节点需要向终端节点发送首数据包时, 对端节点会将 首数据包发送给 MAG3 , 而 MAG3会通过 IGW3向终端节点的归属网进行终 端位置查询, 此消息会到达终端的归属互通网关 IGW1。
步骤 907 , IGW1使用终端的 HNP向 MAPS1查询其当前位置信息, MAPS1 根据终端 HNP查询到终端的漫游标识。
步骤 908 , MAPS 1将终端漫游标识返回给 IGW1。
步骤 909, IGW1将终端漫游标识返回给 IGW3。
步骤 910, MAG3将首数据包转发给 MAG2。
步骤 911 , MAG2将首数据包转发给终端。
后续的数据包转发路径直接由 MAG3转发到 IGW3和 MAG2, 并最终转 发给终端。
CN位于 MN的除归属域和拜访域之外的传统 PMIP域的情况。
MN向 CN方向, 终端节点向对端节点发送首数据包过程中, 所述终端 节点向所述拜访 PMIP域的移动接入网关发送首数据包, 此移动接入网关向 所述拜访 PMIP域的映射服务器查询对端节点位置信息并收到所述映射服务 器发送的域间通信指示后,将所述首数据包发送至所述对端节点所属的 PMIP 域。
CN向 MN方向,所述归属 PMIP域的互通网关从所述对端节点所属 PMIP 域的本地移动锚点收到所述对端节点发往所述终端节点的首数据包后, 使用 所述终端节点的家乡网络前缀向所述归属 PMIP域的映射服务器查询所述终 端节点的位置信息时获知所述漫游标识,根据所述漫游标识以所述拜访 PMIP 域中所述终端节点所属的移动接入网关为目的网元将所述首数据包发送至所 述拜访 PMIP域中所述终端节点所属的移动接入网关,所述拜访 PMIP域中所 述终端节点所属的移动接入网关将所述首数据包发送至所述终端节点。
参考图 10对端位于传统 PMIP域时节点间通信的路由优化方法, 具体实 现步骤如下:
步骤 1001 , 当终端需要将首数据包发送到对端节点时, 终端首先会将首 数据包发送给 MAG2。
步骤 1002, MAG2会向 MAPS2查询对端节点的当前位置信息。
步骤 1003 , MAPS2根据对端节点的地址信息发现其不在本 PMIP域内, 则 MAPS2会向 MAG2返回域间通信指示。
步骤 1004 , MAG2将首数据包向互通网关 IGW2转发。
步骤 1005, IGW2将首数据包转发到对端节点的 LMA3 , LMA3通过隧 道将首数据包发送到 MAG3 , 并最终转发给对端节点。
MN 向 CN 方 向 的 后 续 数 据 包 的 传 输 路 径 为 MN-MAG2-IGW2-IGW3-MAG3-CN。
步骤 1006, 当对端节点需要向终端节点发送首数据包时, 对端节点会将 首数据包发送给 MAG3 , 而 MAG3使用隧道将首数据包转发到 LMA3上, 随 后由 LMA3发往终端的归属域并由 IGW1截获。
步骤 1007, IGW1使用终端的 HNP向 MAPS1 查询其当前位置信息, MAPS 1根据终端 HNP查询到终端的漫游标识。
步骤 1008 , MAPS 1将终端漫游标识返回给 IGW1。 步骤 1009, IGW1可能会将终端漫游标识返回给 LMA, 但 LMA因为无 法解析此消息, 所以会进行忽略处理。
步骤 1010, IGW1将首数据包转发给 MAG2。
步骤 1011 , MAG2将首数据包转发到终端。
步骤 1012, 后续的数据包转发路径仍然需要经过终端归属网的互通网关
IGW1进行转发, 然后到达 MAG2。所述对端节点所属 PMIP域的本地移动锚 点收到所述对端节点发往所述终端节点的后续数据包后,经由所述归属 PMIP 域转发至所述拜访 PMIP域。
所述终端节点从所述拜访 PMIP域的源移动接入网关切换到目标移动接 入网关, 所述拜访 PMIP域的映射服务器经由所述拜访 PMIP域和所述归属 PMIP域的互通网关将所述目标移动接入网关的地址通知至所述归属 PMIP域 的映射服务器, 此映射服务器将所述目标移动接入网关的地址通知至所述归 属 PMIP域的移动接入网关, 此移动接入网关将所述目标移动接入网关的地 址通知至所述归属 PMIP域的互通网关, 此互通网关将所述目标移动接入网 关的地址通知至所述对端节点所属的移动接入网关。
参考图 11终端在拜访域发生跨 MAG切换后地址信息更新的方法, 具体 实现步骤如下:
步骤 1101 , 终端在拜访域由 MAG2切换到 MAG4。
步骤 1102,为了保证与对端节点之间顺利的通信, MAPS2可能会将终端 位置信息 (例如: 新的 CoA和 /或 MAG4的地址)发送给 IGW1和 MAPS 1。
步骤 1103 , MAPS1将终端位置信息 (例如: 新的 CoA和 /或 MAG4的地 址)更新到 MAG1上。
步骤 1104, MAG1将终端位置信息 (例如:新的 CoA和 /或 MAG4的地址) 更新到 IGW1上。
步骤 1105, IGW1最终将终端位置信息 (例如: 新的 CoA和 /或 MAG4的 地址)更新到 MAG3上面。
与上述方法对应的在 PMIP域间漫游时的节点通信系统, 包括终端节点、 对端节点、 终端节点所属的支持路由优化的归属 PMIP域、 终端节点所属的 支持路由优化的拜访 PMIP域、所述对端节点所属的 PMIP域。各组成单元的 功能和执行方式与上述方法中描述的相同, 此处不再赘述。
本方案中提供的映射服务器, 包括漫游标识处理模块。
所述漫游标识处理模块, 用于在所述映射服务器作为终端节点漫游后所 属的拜访 PMIP域中的映射服务器时, 为所述终端节点分配表示所述终端节 点在所述拜访 PMIP域中位置信息的漫游标识并将所述漫游标识与所述终端 节点的家乡网络前缀绑定, 还将此漫游标识通知至所述归属 PMIP域。
所述漫游标识处理模块, 用于在所述映射服务器作为终端节点的归属 PMIP域中的映射服务器时,收到使用所述终端节点的家乡网络前缀向映射服 务器查询所述终端节点位置的请求后, 向请求方提供所述漫游标识。
需要说明的是, 在不冲突的情况下, 本申请中的实施例及实施例中的特 征可以相互任意组合。 当然, 本发明还可有其他多种实施例, 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。 本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
工业实用性 本方案为节点在 PMIP域间漫游时的通信问题提供了解决方案。

Claims

权 利 要 求 书
1、 一种在 PMIP域间漫游时的节点通信方法, 其中,
终端节点从支持路由优化的归属 PMIP域漫游到支持路由优化的拜访 PMIP域后, 所述拜访 PMIP域为所述终端节点分配表示所述终端节点在所述 拜访 PMIP域中位置信息的漫游标识并将所述漫游标识与所述终端节点的家 乡网络前缀绑定, 还将此漫游标识通知至所述归属 PMIP域, 所述归属 PMIP 域将所述终端节点的家乡网络前缀和所述漫游标识绑定;
所述对端节点至所述终端节点的首数据包传输过程中, 所述归属 PMIP 域根据所述终端节点的家乡网络前缀查询到所述漫游标识, 所述对端节点所 属的 PMIP域根据所述漫游标识以所述拜访 PMIP域中所述终端节点所属的移 动接入网关为目的网元将所述首数据包发送至所述拜访 PMIP域。
2、 如权利要求 1所述的方法, 其中,
终端节点从支持路由优化的归属 PMIP域漫游到支持路由优化的拜访 PMIP域后,所述终端节点所属的移动接入网关向映射服务器发送代理绑定更 新, 所述映射服务器直接或经由所述移动接入网关将所述漫游标识发送至所 述终端节点所属的互通网关, 所述互通网关将所述漫游标识通知至所述归属 PMIP域。
3、 如权利要求 1所述的方法, 其中,
所述拜访 PMIP域的映射服务器将所述终端节点的家乡网络前缀和所述 漫游标识绑定;
所述对端节点位于所述拜访 PMIP域时, 所述对端节点向终端节点发送 首数据包过程中, 所述对端节点所属的移动接入网关使用所述终端节点的家 乡网络前缀向映射服务器查询所述终端节点所属移动接入网关的信息, 所述 拜访 PMIP域的映射服务器根据所述家乡网络前缀查询到所述漫游标识, 在 所述拜访 PMIP域内实现向对端节点的数据发送。
4、 如权利要求 1所述的方法, 其中,
所述对端节点位于所述拜访 PMIP域时, 所述终端节点向对端节点发送 首数据包过程中, 所述终端节点向所述拜访 PMIP域的移动接入网关发送首 数据包, 此移动接入网关向所述拜访 PMIP域的映射服务器查询到对端节点 位置信息, 将所述首数据包经由所述对端节点所属的移动接入网关发送至所 述对端节点。
5、 如权利要求 1所述的方法, 其中,
所述对端节点位于所述拜访 PMIP域之外的 PMIP域时,所述终端节点向 对端节点发送首数据包过程中, 所述终端节点向所述拜访 PMIP域的移动接 入网关发送首数据包, 此移动接入网关向所述拜访 PMIP域的映射服务器查 询对端节点位置信息并收到所述映射服务器发送的域间通信指示后, 将所述 首数据包发送至所述对端节点所属的 PMIP域。
6、 如权利要求 1所述的方法, 其中,
所述对端节点位于所述归属 PMIP域时,所述归属 PMIP域的移动接入网 关收到所述对端节点发往所述终端节点的首数据包后 , 使用所述终端节点的 家乡网络前缀向所述归属 PMIP域的映射服务器查询所述终端节点的位置信 息时获知所述漫游标识, 根据所述漫游标识以所述拜访 PMIP域中所述终端 节点所属的移动接入网关为目的网元将所述首数据包发送至所述拜访 PMIP 域中所述终端节点所属的移动接入网关, 所述拜访 PMIP域中所述终端节点 所属的移动接入网关将所述首数据包发送至所述终端节点。
7、 如权利要求 1所述的方法, 其中,
所述对端节点位于所述归属 PMIP域和所述拜访 PMIP域之外的其它支持 路由优化的 PMIP域时, 所述归属 PMIP域的互通网关从所述对端节点所属 PMIP域的互通网关收到所述对端节点发往所述终端节点的首数据包后 ,使用 所述终端节点的家乡网络前缀向所述归属 PMIP域的映射服务器查询所述终 端节点的位置信息时获知所述漫游标识,根据所述漫游标识以所述拜访 PMIP 域中所述终端节点所属的移动接入网关为目的网元将所述首数据包发送至所 述拜访 PMIP域中所述终端节点所属的移动接入网关,所述拜访 PMIP域中所 述终端节点所属的移动接入网关将所述首数据包发送至所述终端节点。
8、 如权利要求 1所述的方法, 其中,
所述对端节点位于所述归属 PMIP域和所述拜访 PMIP域之外的支持路由 优化的 PMIP域时,所述对端节点所属的 PMIP域的互通网关收到所述对端节 点发往所述终端节点的首数据包后, 经由所述归属 PMIP域的互通网关使用 所述终端节点的家乡网络前缀向所述归属 PMIP域的映射服务器查询所述终 端节点的位置信息并获知所述漫游标识, 所述对端节点所属的 PMIP域的互 通网关根据所述漫游标识将所述首数据包发送至所述拜访 PMIP域中所述终 端节点所属的移动接入网关, 所述拜访 PMIP域中所述终端节点所属的移动 接入网关将所述首数据包发送至所述终端节点。
9、 如权利要求 7或 8所述的方法, 其中,
所述归属 PMIP域的互通网关向所述归属 PMIP域的映射服务器查询所述 终端节点的位置信息时获知所述漫游标识后, 将所述漫游标识通知至所述对 端节点所属 PMIP域中所述对端节点所属的互通网关; 所述对端节点所属的 互通网关收到所述对端节点发往所述终端节点的后续数据包后, 直接发送至 所述拜访 PMIP域。
10、 如权利要求 1所述的方法, 其中,
所述对端节点位于所述归属 PMIP域和所述拜访 PMIP域之外的传统
PMIP域时, 所述归属 PMIP域的互通网关从所述对端节点所属 PMIP域的本 地移动锚点收到所述对端节点发往所述终端节点的首数据包后, 使用所述终 端节点的家乡网络前缀向所述归属 PMIP域的映射服务器查询所述终端节点 的位置信息时获知所述漫游标识, 根据所述漫游标识以所述拜访 PMIP域中 所述终端节点所属的移动接入网关为目的网元将所述首数据包发送至所述拜 访 PMIP域中所述终端节点所属的移动接入网关,所述拜访 PMIP域中所述终 端节点所属的移动接入网关将所述首数据包发送至所述终端节点。
11、 如权利要求 10所述的方法, 其中,
所述对端节点所属 PMIP域的本地移动锚点收到所述对端节点发往所述 终端节点的后续数据包后, 经由所述归属 PMIP域转发至所述拜访 PMIP域。
12、 如权利要求 1所述的方法, 其中,
所述终端节点从所述拜访 PMIP域的源移动接入网关切换到目标移动接 入网关, 所述拜访 PMIP域的映射服务器经由所述拜访 PMIP域和所述归属 PMIP域的互通网关将所述目标移动接入网关的地址通知至所述归属 PMIP域 的映射服务器, 此映射服务器将所述目标移动接入网关的地址通知至所述归 属 PMIP域的移动接入网关, 此移动接入网关将所述目标移动接入网关的地 址通知至所述归属 PMIP域的互通网关, 此互通网关将所述目标移动接入网 关的地址通知至所述对端节点所属的移动接入网关。
13、 一种在 PMIP域间漫游时的节点通信系统, 其中, 包括终端节点、 对端节点、 终端节点所属的支持路由优化的归属 PMIP域、 终端节点所属的 支持路由优化的拜访 PMIP域、 所述对端节点所属的 PMIP域;
所述拜访 PMIP域设置为:在终端节点从支持路由优化的归属 PMIP域漫 游到支持路由优化的拜访 PMIP域后, 为所述终端节点分配表示所述终端节 点在所述拜访 PMIP域中位置信息的漫游标识并将所述漫游标识与所述终端 节点的家乡网络前缀绑定, 还将此漫游标识通知至所述归属 PMIP域;
所述归属 PMIP域设置为: 将所述终端节点的家乡网络前缀和所述漫游 标识绑定; 还用于在所述对端节点至所述终端节点的首数据包传输过程中, 才艮据所述终端节点的家乡网络前缀查询到所述漫游标识;
所述对端节点所属的 PMIP域还设置为: 根据所述漫游标识以所述拜访 PMIP域中所述终端节点所属的移动接入网关为目的网元将所述首数据包发 送至所述拜访 PMIP域。
14、 如权利要求 13所述的系统, 其中,
所述拜访 PMIP域包括映射服务器; 所述归属 PMIP域包括映射服务器; 所述拜访 PMIP域的映射服务器设置为: 为所述终端节点分配表示所述 终端节点在所述拜访 PMIP域中位置信息的漫游标识并将所述漫游标识与所 述终端节点的家乡网络前缀绑定;
所述归属 PMIP域的映射服务器设置为:从所述拜访 PMIP域获知所述终 端节点的漫游标识后, 并将所述漫游标识与所述终端节点的家乡网络前缀绑 定。
15、 如权利要求 14所述的系统, 其中,
所述归属 PMIP域包括移动接入网关;所述拜访 PMIP域包括移动接入网 关;
所述归属 PMIP域的移动接入网关设置为: 收到所述对端节点发往所述 终端节点的首数据包后,使用所述终端节点的家乡网络前缀向所述归属 PMIP 域的映射服务器查询所述终端节点的位置信息时获知所述漫游标识, 并将所 述首数据包经由所述归属 PMIP域的互通网关发送至所述拜访 PMIP域的移动 接入网关。
16、 如权利要求 14所述的系统, 其中,
所述归属 PMIP域包括互通网关;
所述归属 PMIP域的互通网关设置为: 收到所述对端节点发往所述终端 节点的首数据包后, 使用所述终端节点的家乡网络前缀向所述归属 PMIP域 的映射服务器查询所述终端节点的位置信息时获知所述漫游标识, 并将所述 首数据包发送至所述拜访 PMIP域的互通网关。
17、 如权利要求 16所述的系统, 其中,
所述归属 PMIP域的互通网关还设置为:从所述归属 PMIP域的映射服务 器获知所述漫游标识后, 将所述漫游标识通知至所述拜访 PMIP域。
18、 如权利要求 14所述的系统, 其中,
所述对端节点所属 PMIP域包括互通网关;
所述对端节点所属 PMIP域的互通网关设置为:收到所述对端节点向所述 终端节点发送的首数据包后, 使用所述终端节点的家乡网络前缀向所述归属 PMIP域查询所述终端节点的位置信息时获知所述漫游标识后,根据所述漫游 标识将所述首数据包发送至所述拜访域。
19、 一种映射服务器, 其中,
所述映射服务器包括漫游标识处理模块;
所述漫游标识处理模块设置为: 在所述映射服务器作为终端节点漫游后 所属的拜访 PMIP域中的映射服务器时, 为所述终端节点分配表示所述终端 节点在所述拜访 PMIP域中位置信息的漫游标识并将所述漫游标识与所述终 端节点的家乡网络前缀绑定, 还将此漫游标识通知至所述归属 PMIP域。
20、 一种映射服务器, 其中,
所述映射服务器包括漫游标识处理模块;
所述漫游标识处理模块设置为: 在所述映射服务器作为终端节点的归属
PMIP域中的映射服务器时,收到使用所述终端节点的家乡网络前缀向映射服 务器查询所述终端节点位置的请求后, 向请求方提供所述漫游标识。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111770486A (zh) * 2019-03-30 2020-10-13 华为技术有限公司 一种终端漫游的方法及装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110913348B (zh) * 2020-01-08 2021-09-07 石家庄铁道大学 无固定基础设施依托的分布式网络架构及其位置管理方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1697548A (zh) * 2004-05-14 2005-11-16 华为技术有限公司 一种移动IPv6节点远程动态配置家乡地址的方法
CN101051986A (zh) * 2006-05-15 2007-10-10 华为技术有限公司 一种实现快速切换的方法及装置
CN101400045A (zh) * 2007-09-30 2009-04-01 华为技术有限公司 转发报文的方法、系统和锚点设备
WO2009040700A2 (en) * 2007-09-24 2009-04-02 Telefonaktiebolaget Lm Ericsson (Publ) Traffic localization with proxy mobility

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1697548A (zh) * 2004-05-14 2005-11-16 华为技术有限公司 一种移动IPv6节点远程动态配置家乡地址的方法
CN101051986A (zh) * 2006-05-15 2007-10-10 华为技术有限公司 一种实现快速切换的方法及装置
WO2009040700A2 (en) * 2007-09-24 2009-04-02 Telefonaktiebolaget Lm Ericsson (Publ) Traffic localization with proxy mobility
CN101400045A (zh) * 2007-09-30 2009-04-01 华为技术有限公司 转发报文的方法、系统和锚点设备

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111770486A (zh) * 2019-03-30 2020-10-13 华为技术有限公司 一种终端漫游的方法及装置
CN111770486B (zh) * 2019-03-30 2022-02-08 华为技术有限公司 一种终端漫游的方法及装置

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