WO2013026295A1 - Système et procédé de communication de nœuds entre des domaines ip mobiles mandataires - Google Patents

Système et procédé de communication de nœuds entre des domaines ip mobiles mandataires Download PDF

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Publication number
WO2013026295A1
WO2013026295A1 PCT/CN2012/075747 CN2012075747W WO2013026295A1 WO 2013026295 A1 WO2013026295 A1 WO 2013026295A1 CN 2012075747 W CN2012075747 W CN 2012075747W WO 2013026295 A1 WO2013026295 A1 WO 2013026295A1
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WO
WIPO (PCT)
Prior art keywords
domain
pmip
gateway
mobile access
access gateway
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PCT/CN2012/075747
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English (en)
Chinese (zh)
Inventor
涂杨巍
霍玉臻
沈岷
骆文
江鸿
宋军
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中兴通讯股份有限公司
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Publication of WO2013026295A1 publication Critical patent/WO2013026295A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer

Definitions

  • the present invention relates to the field of communications, and in particular, to a proxy mobile IP inter-domain node communication system and method.
  • the Transmission Control Protocol/Internet Protocol does not consider the topology change of the terminal in the initial design. That is, the TCP/IP protocol itself does not support mobility.
  • IP provides routing for the Internet. All nodes (including hosts and routers) are assigned logical addresses, ie IP addresses, and each port of each host is assigned a IP address.
  • the 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 routing 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 mobile nodes a major problem facing the mobile Internet.
  • IP Mobile IP, MIP for short
  • Proxy MIP Proxy MIP
  • ⁇ Proxy MIP
  • the MIP protocol uses the Home Agent (HA) as the anchor point
  • the PMIP protocol uses the Local Mobility Anchor (LMA) as the anchor point.
  • HA Home Agent
  • LMA Local Mobility Anchor
  • FIG 1 shows the logical architecture of the PMIP protocol, including the mobile node (Mobile Node, Jane It is called MN), Correspondent Node (CN), Mobile Access Gateway (MAG), and Local Mobility Anchor (LMA).
  • the communication peer end may be a fixed node or a mobile node, that is, has a corresponding mobile access gateway and a local mobility anchor point.
  • the mobile access gateway is the first hop router of the mobile node, and its main functions include assigning a Care of Address (CoA) to the mobile node when it is accessed, and performing a local mobility anchor with the mobile node instead of the mobile node.
  • PMIP Binding PMIP Binding
  • the local mobility anchor is used as an anchor point of the mobile node, and its main functions include assigning a Home of Address (HoA) to the mobile node 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, the above CoA and HoA, and save it locally.
  • a bidirectional tunnel is established between the MAG and the LMA for the MN. It should be noted that 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 the metropolitan area network; and the LMA is generally located at a higher topology, such as the core part of the provincial backbone network.
  • the MAG and the LMA are often connected by a multi-hop router.
  • the mobile 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 current PMIP network architecture is based on the movement of the terminal nodes under the same local mobility anchor point in the same PMIP domain, and the node communication methods between different PMIP domains are not clearly defined, especially between route optimization PMIP domains. And a method of node communication between the route optimization PMIP domain and the traditional PMIP domain.
  • the technical problem to be solved by the embodiments of the present invention is to provide a proxy mobile IP inter-domain node communication system and method, and solve the communication problem between the route optimization PMIP domains and the route optimization PMIP domain and the traditional PMIP domain.
  • an embodiment of the present invention provides a proxy mobile IP inter-domain node domain, where the route optimization PMIP domain and the traditional PMIP domain include a mobile node, a mobile access gateway, and a local mobility anchor point, where
  • the route optimization PMIP domain further includes one or more interworking gateways
  • the interworking gateway is configured to: implement the route optimization PMIP domain and other route optimization PMIP domain, or the route optimizes data interaction between the PMIP domain and the traditional PMIP domain.
  • the interworking gateway is further configured to broadcast, to other PMIP domains, a network prefix of a PMIP domain to which the interworking gateway belongs.
  • the mobile access gateway is configured to: after receiving a data packet sent by the calling mobile node in the PMIP domain, query the local mobile anchor point to query the address of the opposite mobile access gateway, if the inter-domain communication is received Instructing to send the data packet to the interworking gateway corresponding to the inter-domain communication indication in the PMIP domain;
  • the local mobility anchor is set to: after receiving the request of the mobile access gateway to query the address of the mobile access gateway in the PMIP domain, and determining that the peer mobile access gateway is not in the PMIP domain,
  • the ingress gateway returns an inter-domain communication indication;
  • the inter-domain communication indicates an address carrying the interworking gateway or an inter-domain communication identifier for indicating that the data packet is sent to the interworking gateway address;
  • the interworking gateway is configured to implement data interaction between the PMIP domains in the following manner: After receiving the data packet sent by the mobile access gateway in the PMIP domain, the data packet is sent to the target PMIP domain.
  • the mobile access gateway is further configured to: determine, according to the inter-domain communication identifier, an interworking gateway corresponding to the i or the inter-communication identifier by using a local policy.
  • the local mobility anchor is further configured to: when it is determined that the peer mobile access gateway is not in the PMIP domain and the plurality of interworking gateways can communicate with the target PMIP domain, returning is the closest to the target PMIP domain.
  • the address of the interworking gateway is further configured to: when it is determined that the peer mobile access gateway is not in the PMIP domain and the plurality of interworking gateways can communicate with the target PMIP domain, returning is the closest to the target PMIP domain.
  • the address of the interworking gateway is further configured to: when it is determined that the peer mobile access gateway is not in the PMIP domain and the plurality of interworking gateways can communicate with the target PMIP domain, returning is the closest to the target PMIP domain. The address of the interworking gateway.
  • the mobile access gateway is further configured to: after receiving the inter-domain communication identifier, select an interworking gateway that is closest to the target PMIP domain.
  • the interworking gateway is configured to implement data interaction between PMIP domains in the following manner: After receiving the data packet sent by the other PMIP domain, query the local mobile anchor point of the PMIP domain to query the address of the mobile access gateway serving the called node, and send the data packet to the queried mobile access gateway;
  • the mobile anchor point is further configured to: after receiving the request of the interworking gateway of the PMIP domain to query the address of the mobile access gateway, return the address of the mobile access gateway serving the called node to the interworking gateway;
  • the mobile access gateway is further configured to: after receiving the data packet sent by the interworking gateway of the PMIP domain, send the packet to the called node of the PMIP domain.
  • the mobile access gateway is further configured to: when the mobile access gateway is the target mobile access gateway, obtain an inter-domain communication indication from the source mobile access gateway or the local mobility anchor, where the inter-domain communication is performed. Indicates the address carrying the interworking gateway or the inter-domain communication identifier used to indicate the forwarding of the data packet to the interworking gateway address.
  • the mobile access gateway is further configured to: when the source mobile access gateway or the target mobile access gateway is used as the mobile node handover process, send the address of the target mobile access gateway to the Interworking gateway of the PMIP domain.
  • the local mobility anchor is further configured to: send the address of the target mobile access gateway to the interworking of the PMIP domain in the process of the mobile node switching from the source mobile access gateway to the target mobile access gateway. Gateway.
  • the embodiment of the invention further provides a proxy mobile IP (PMIP) inter-domain node communication method, which comprises:
  • the method further includes:
  • the interworking gateway broadcasts the network prefix of the PMIP domain to which the interworking gateway belongs to other PMIP domains.
  • the steps of data interaction between domains include:
  • the route optimizes the mobile node in the PMIP domain as the calling mobile node, sending a data packet to the mobile access gateway, where the mobile access gateway queries the local mobile anchor point to query the peer mobile access gateway. And the local mobility anchor point returns an inter-domain communication indication to the mobile access gateway when the peer mobile access gateway is not in the belonging PMIP domain, where the inter-domain communication indication carries the address of the interworking gateway or is used to indicate that The inter-domain communication identifier sent by the data packet to the interworking gateway address; the mobile access gateway sends the data packet to the interworking gateway corresponding to the inter-domain communication indication in the PMIP domain; the interworking gateway sends the data packet to the target PMIP domain.
  • the steps of data interaction between domains also include:
  • the mobile access gateway determines, by the local policy, an interworking gateway corresponding to the inter-domain communication identifier according to the inter-domain communication identifier. Further steps of data interaction between domains include:
  • the local mobility anchor returns an inter-domain communication identifier corresponding to the interworking gateway closest to the target PMIP domain when it is determined that the peer mobile access gateway is not in the PMIP domain and the plurality of interworking gateways can communicate with the target PMIP domain, or After receiving the inter-domain communication identifier, the mobile access gateway selects an interworking gateway that is closest to the target PMIP domain.
  • the steps of data interaction between domains include:
  • the interworking gateway receives the data packet sent by the other PMIP domain and then queries the local mobility anchor of the belonging PMIP domain to query the address of the mobile access gateway serving the called node, the local mobility anchor. Pointing to the interworking gateway, returning an address of the mobile access gateway serving the called node; the interworking gateway transmitting the data packet to the learned mobile access gateway, and after receiving the data packet sent by the interworking gateway, the mobile access gateway receives the data packet Send to the called node of the own PMIP domain.
  • the steps of data interaction between domains include:
  • the target mobile access gateway acquires an inter-domain communication indication from the source mobile access gateway or the local mobility anchor point, where the inter-domain communication indication carries the address of the interworking gateway. Or used to indicate the inter-domain communication that sends the packet to the address of the interworking gateway. Letter logo.
  • the steps of data interaction between domains include:
  • the source mobile access gateway or the target mobile access gateway or the local mobility anchor transmits the address of the mobile node's current serving mobile access gateway to the interworking gateway.
  • the embodiment of the present invention further provides an interworking gateway, which is disposed in a Route Optimization Proxy Mobile IP (PMIP) domain, and is configured to: implement data exchange between the PMIP domain and other PMIP domains.
  • PMIP Route Optimization Proxy Mobile IP
  • the interworking gateway is further configured to:
  • the interworking gateway is configured to implement data interaction between the route optimized PMIP domain and other PMIP domains in the following manner:
  • the data packet After receiving the data packet sent by the mobile access gateway in the routing optimized PMIP domain, the data packet is sent to the target PMIP domain.
  • the interworking gateway is configured to implement data interaction between the route optimized PMIP domain and other PMIP domains in the following manner:
  • the local mobile anchor point of the PMIP domain After receiving the data packet sent by the other PMIP domain, the local mobile anchor point of the PMIP domain is queried for the address of the mobile access gateway serving the called node, and the data packet is sent to the queried mobile access gateway.
  • This solution provides a solution for routing optimization between PMIP domains and routing optimization between PMIP domains and traditional PMIP domains.
  • 1 is a schematic diagram of an architecture of an existing PMIP system
  • 2 is a system architecture diagram of PMIP inter-domain node communication
  • FIG. 3 is a method for routing an optimized node in a PMIP domain as a communication calling party in a specific embodiment 1.
  • FIG. 4 is a schematic diagram of a method for routing an optimized node in a PMIP domain as a communication called side in a second embodiment
  • FIG. 5 is a schematic diagram of a method for updating a gateway address when a node switches in a PMIP inter-domain node communication in the third embodiment.
  • the proxy mobile IP inter-domain node communication system includes a Route Optimization Proxy Mobile IP (PMIP) domain and/or a Legacy Proxy Mobile IP (PMIP) domain
  • the route optimization PMIP domain and the legacy PMIP domain include a mobile node
  • the mobile access gateway, the local mobility anchor, the route optimization PMIP domain further includes one or more interworking gateways (IGWs); the interworking gateways are used to implement data interaction between the PMIP domains.
  • This interworking gateway is used for signaling interaction with other PMIP domains, and is also a data exit between the PMIP domain and other PMIP domains.
  • multiple interworking gateways may be set at the boundary of the domain, and different interworking gateways are selected according to the route optimization principle for the target node in different domains.
  • the interworking gateway can be combined with a border router or a separate device.
  • the PMIP inter-domain node communication method corresponding to the foregoing system includes: setting one or more interworking gateways in the route optimization PMIP domain; and implementing data interaction between the PMIP domains by using the interworking gateway.
  • the interworking gateway In order to ensure that the data packets of the foreign domain can reach the interworking gateway, the interworking gateway broadcasts the network prefix of the PMIP domain to which the interworking gateway belongs to other PMIP domains.
  • the scenario of PMIP inter-domain node communication can be divided into two routes to optimize node communication between PMIP domains and one route to optimize communication between PMIP domains and traditional PMIP domains.
  • the calling mobile node sends a data packet to the mobile access gateway, and the mobile access gateway queries the local mobile anchor point for the address of the opposite mobile access gateway, and the local mobile anchor point determines that the mobile access gateway of the opposite end is not in the PMIP domain,
  • the access gateway returns an inter-domain communication indication, and the inter-domain communication indicates that the interworking is carried out.
  • This target PMIP domain may be a route-optimized PMIP domain or a traditional PMIP domain.
  • the mobile access gateway can directly determine the interworking gateway according to the address of the interworking gateway, and can also determine the interworking gateway corresponding to the inter-domain communication identifier by using the local policy according to the inter-domain communication identifier.
  • the local mobility anchor returns an address corresponding to the nearest interworking gateway from the target PMIP domain when the peer mobile access gateway is not in the PMIP domain and the plurality of interworking gateways can communicate with the target PMIP domain, or the mobile access gateway After receiving the inter-domain communication identifier, select the interworking gateway closest to the target PMIP domain.
  • the mobile access gateway After receiving the data packet sent by the calling mobile node in the PMIP domain, the mobile access gateway queries the local mobile anchor point for the address of the opposite mobile access gateway, and if receiving the inter-domain communication indication, The data packet is sent to the interworking gateway corresponding to the inter-domain communication indication in the associated PMIP domain.
  • the local mobility anchor is configured to: after receiving the request for the mobile access gateway to query the address of the mobile access gateway in the PMIP domain, to determine that the peer mobile access gateway is not in the PMIP domain, return to the mobile access gateway.
  • the inter-domain communication indication indicates that the inter-domain communication indicates an address carrying the interworking gateway or an inter-domain communication identifier indicating that the data packet is sent to the interworking gateway address.
  • the interworking gateway is further configured to send the data packet to the target PMIP domain after receiving the data packet sent by the mobile access gateway in the PMIP domain.
  • the interworking gateway After receiving the data packet sent by the other PMIP domain, the interworking gateway queries the local mobility anchor of the PMIP domain to query the address of the mobile access gateway serving the called node, and the local mobility anchor returns the service of the called node to the interworking gateway.
  • the address of the access gateway the interworking gateway sends the data packet to the learned mobile access gateway, and after receiving the data packet sent by the interworking gateway, the mobile access gateway sends the data packet to the called node of the PMIP domain.
  • the interworking gateway is configured to, after receiving the data packet sent by the other domain, query the local mobile anchor point of the domain to query the address of the mobile access gateway serving the called node, and send the address to the queried mobile access gateway.
  • the local mobility anchor is configured to: after receiving the request of the interworking gateway of the domain to query the address of the mobile access gateway, return the address of the mobile access gateway serving the called node to the interworking gateway; the mobile access gateway is configured to receive After the packet is sent to the interworking gateway of the domain, it is sent to the called node of the domain.
  • the target mobile access gateway acquires an inter-domain communication indication from the source mobile access gateway or the local mobility anchor point, where the inter-domain communication indication carries the address of the interworking gateway. Or an inter-domain communication identifier for indicating that the data packet is sent to the interworking gateway address, and is used for forwarding the data packet from the mobile node to the interworking gateway.
  • the source mobile access gateway or the target mobile access gateway or the local mobility anchor sends the address of the mobile node's current serving mobile access gateway to the interworking gateway. Therefore, the relationship between the mobile node and the current serving MAG address is synchronized, and the interworking gateway forwards the downlink data packet to the current MAG.
  • the optimized route is used, and the process of querying the address of the relevant network element is not needed, so as to minimize the route bypass.
  • Step 301 The mobile node MN sends a data packet to the MAG.
  • Step 302 The MAG caches the data, and then queries the LMA for the MAG address of the opposite end.
  • the inter-domain communication indication may be the location of the interworking gateway IGW. Address or an inter-domain communication identifier.
  • Step 304 The MAG determines the interworking gateway according to the returned inter-domain communication indication and forwards the data packet to the interworking gateway.
  • Step 305 The interworking gateway IGW forwards the data packet to the network domain to which the peer belongs according to the peer address.
  • the peer network may be a route optimized PMIP domain or a traditional PMIP domain.
  • Step 306 The forwarding path of the subsequent data packet is no longer forwarded by the LMA.
  • Step 401 The calling end network forwards the data packet to the interworking gateway IGW of the called end MN.
  • the calling end network may be a route optimized PMIP domain or a traditional PMIP domain.
  • Step 402 The interworking gateway IGW caches the data packet, and then queries the LMA for the MAG address of the called end MN.
  • Step 403 The LMA returns the current MAG address of the MN to the IGW.
  • Steps 404 ⁇ 405 the IGW forwards the data packet to the MAG, and then the MAG forwards the data packet to the MME.
  • Step 406 The forwarding path of the subsequent data packet will not be forwarded by the LMA.
  • Step 501 Before the handover occurs, the forwarding path of the data packet is the mobile node to the MAG, and then to the interworking gateway.
  • Step 502 The mobile node switches from the MAG1 to the MAG2, where the LMA may send the inter-domain communication indication to the MAG2 in the response of the MAG2 registration, so that the data sent by the mobile node to the MAG2 is forwarded out of the PMIP domain through the interworking gateway.
  • Step 503 After the mobile node completes the handover, the LMA may send a new MAG2 address to the interworking gateway to synchronize the binding relationship between the mobile node and the MAG2.
  • Step 504 MAG1 may send an inter-domain communication indication to MAG2.
  • Steps 505 ⁇ 506, MAG1 or MAG2 may send the address of MAG2 to the interworking gateway. Used to synchronize the binding relationship between the mobile node and MAG2.
  • Step 507 the packet forwarding path after the handover is the mobile node to the MAG2, and then to the interworking gateway.
  • This solution provides a solution for routing optimization between PMIP domains and routing optimization between PMIP domains and traditional PMIP domains.

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

Abstract

La présente invention concerne un système et un procédé pour une communication de nœuds entre des domaines IP mobiles mandataires. Le procédé comprend une un domaine PMIP (domaine IP mobile mandataire) d'optimisation de routage entre et/ou un domaine PMIP conventionnel. Le domaine PMIP d'optimisation de routage et le domaine PMIP conventionnel comprennent un nœud mobile, une passerelle d'accès mobile et une ancre mobile locale. Le domaine PMIP d'optimisation de routage comprend en outre une ou plusieurs passerelles d'interfonctionnement. La passerelle d'interfonctionnement est configurée pour implémenter un échange de données entre le domaine PMIP d'optimisation de routage et d'autres domaines PMIP d'optimisation de routage, ou entre le domaine PMIP d'optimisation de routage et le domaine PMIP conventionnel.
PCT/CN2012/075747 2011-08-24 2012-05-18 Système et procédé de communication de nœuds entre des domaines ip mobiles mandataires WO2013026295A1 (fr)

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CN201110248271.5A CN102958039B (zh) 2011-08-24 2011-08-24 一种代理移动ip域间节点通信系统及方法
CN201110248271.5 2011-08-24

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CN101064648A (zh) * 2006-04-30 2007-10-31 华为技术有限公司 实现移动IPv6的系统及其用户连接建立方法
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