CN103037351A - Node communication method and communication system during proxy mobile internet protocol (PMIP) inter-domain roaming - Google Patents

Node communication method and communication system during proxy mobile internet protocol (PMIP) inter-domain roaming Download PDF

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CN103037351A
CN103037351A CN 201110299631 CN201110299631A CN103037351A CN 103037351 A CN103037351 A CN 103037351A CN 201110299631 CN201110299631 CN 201110299631 CN 201110299631 A CN201110299631 A CN 201110299631A CN 103037351 A CN103037351 A CN 103037351A
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pmip territory
terminal node
node
pmip
territory
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CN103037351B (en
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涂杨巍
霍玉臻
沈岷
江鸿
王志海
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Tongfu Heat Treatment Kunshan Co ltd
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ZTE Corp
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Priority to PCT/CN2012/079762 priority patent/WO2013044688A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/12—Mobility data transfer between location registers or mobility servers

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Abstract

The invention discloses a node communication method and a communication system during proxy mobile internet protocol (PMIP) inter-domain roaming. The method includes that a mobile node (MN) roams from a home PMIP domain which supports routing optimization to a visited PMIP domain which supports routing optimization, then the visited PMIP domain distributes a roaming identification which represents positional information of the MN in the visited PMIP domain for the MN and binds the roaming identification and a home network prefix of the MN, the home PMIP domain is informed of the roaming identification, the home PMIP domain binds the home network prefix of the MN and the roaming identification, the home PMIP domain inquires the roaming identification according to the home network prefix of the MN in the transmitting process of a first data packet from a correspondent node (CN) to the MN, and the PMIP domain which the CN belongs to sends the first data packet to the visited PMIP domain with a mobile access gateway which the MN belongs to in the visited PMIP domain as a target network element according to the roaming identification. According to the node communication method and the communication system, a solution is provided for a communication problem of nodes during PMIP inter-domain roaming.

Description

A kind of node communication method and communication system when the internetwork roaming of PMIP territory
Technical field
The present invention relates to the communications field, relate in particular to a kind of node communication method and communication system when the internetwork roaming of PMIP territory.
Background technology
Transmission control protocol/Internet Interconnection agreement (Transmission Control Protocol/Internet Protocol, be called for short TCP/IP), do not consider that when initial designs the situation that topology location changes can occur terminal, namely ICP/IP protocol itself is not supported mobility.In traditional TCP/IP network environment, IP is that internet (Internet) provides routing function, it has all distributed logical address for all nodes (comprising main frame and router), i.e. each port of IP address, and every main frame all distributes an IP address.IP address packet includes network prefix and host machine part, the IP address of the All hosts on the same link has identical network prefix and different host machine part usually.This be so that IP can partly carry out Route Selection according to the network prefix of the IP address of destination node, thereby makes the router order preserve a simple prefix router, and needn't be that every main frame is preserved an independent route.In this case, owing to adopted prefix router, therefore when node did not change its IP address from a link switching to another link, this node then can not receive data message at new link, thereby also just can't communicate with other nodes.
Along with the user sharply rises to the demand of mobility and information, increasing people wishes to obtain the information of urgent need at mobile process high speed ground accessing Internet, finishes and wants the thing done.Therefore, mobile Internet becomes the developing direction of Future Internet, but conventional TCP/IP agreement is not supported ambulant defective, so that the mobile management of terminal node is become a great problem that mobile Internet is faced.
In order to solve the mobile management problem, the mobile management technology that industry is popular, as, Mobile IP (Mobile IP, MIP), proxy-mobile IP (Proxy MIP, PMIP) etc., all come the mobility of support terminal by the mode of introducing fixed anchor point (Anchor).For example, the MIP agreement uses home agent (Home agent, HA) to use local mobile anchor point (Local Mobility Anchor, LMA) as anchor point as anchor point, PMIP agreement.
Shown in Figure 1 is the logical architecture of PMIP agreement, comprise terminal node (Mobile Node, MN), peer node (Correspondent Node, CN), Mobile Access Gateway (Mobile Access Gateway, MAG) and local mobile anchor (Local MobilityAnchor, LMA).Wherein CN can be stationary nodes, also can be mobile node, namely has corresponding MAG and LMA.MAG is the first hop router of MN, is the PMIP binding (PMIP Binding) between the anchor point LMA of its distribution Care-of Address (Care of Address, CoA) and replacement MN execution and MN when its Main Function is included in the MN access.LMA is as the anchor point of MN, and its Main Function is included as MN and distributes home address (Home of Address, HoA) and process above-mentioned PMIP binding.The main purpose of the PMIP that carries out between MAG and LMA binding be allow both sides all know the other side the address, be above-mentioned CoA and HoA, and binding relationship is kept at this locality.In addition, in the binding procedure of carrying out PMIP, also between MAG and LMA, set up a bidirectional tunnel for MN.What deserves to be explained is that the IP address that MN gets access at last is that LMA is the HoA of its distribution.In common network design, MAG generally is positioned at the lower position of topology, such as the edge that is positioned at metropolitan area network; LMA then generally is positioned at the higher position of topology, such as economizing the core of doing net.In fact often link to each other by multiple router hops between MAG and the LMA.
For so that the path of data packet transmission reaches optimum, when terminal node and peer node are all within same PMIP territory, terminal node or peer node can use the MAG of local terminal to get access to the current service MAG of an other end from other network elements, thereby between two MAG, set up a direct link, and do not need packet is routed to LMA again, greatly reduced the detour problem of route.In order to distinguish mutually with traditional PMIP territory, above-mentioned territory is called the PMIP territory of supporting routing optimality.
The system architecture of PMIP territory intermediate node roaming as shown in Figure 2, described PMIP territory can be divided into the PMIP territory of supporting routing optimality and the PMIP territory of not supporting routing optimality is conventional P MIP territory.PMIP territory for supporting routing optimality except traditional network element MAG, comprises a mapping server (Mapping Server, MAPS), mainly carries out the work such as node location management and address mapping relation maintenance.Also comprise in addition one or more for the Interworking gateway (InterworkingGateway of other PMIP territory intercommunications, IGW), its main function comprises and other support to carry out Signalling exchange between the PMIP territory of routing optimalities, it simultaneously also is the data outlet between this PMIP territory and other PMIP territories, on the specific implementation, a plurality of Interworking gateway can be set on the border in territory, in the situation of same area not, select different Interworking gateway according to the route principle of optimality for destination node.In addition, Interworking gateway can close with border router and establish, and also can be an independent equipment.For the packet that guarantees foreign lands can arrive Interworking gateway, Interworking gateway needs its affiliated HoA/ home network prefix of overseas broadcast.
The present PMIP network architecture all is based on terminal node movement under the identical local mobile anchor in same PMIP territory, and terminal roams into the method in another one PMIP territory and does not also define from a PMIP territory, particularly the method for the routing optimality roamed between the PMIP territory of supporting routing optimality of terminal.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of node communication method and communication system when the internetwork roaming of PMIP territory, solves the communication issue of node when the internetwork roaming of PMIP territory.
In order to solve the problems of the technologies described above, the invention provides a kind of node communication method when the internetwork roaming of PMIP territory, wherein, after terminal node roams into the visit PMIP territory of supporting routing optimality from the ownership PMIP territory of supporting routing optimality, described visit PMIP territory is that described terminal node distributes the roaming identity of the described terminal node of expression positional information in described visit PMIP territory and the home network prefix of described roaming identity and described terminal node is bound, also this roaming identity is notified to described ownership PMIP territory, described ownership PMIP territory is with home network prefix and the binding of described roaming identity of described terminal node; Described peer node is to the first transmission of data packets of described terminal node, described ownership PMIP territory inquires described roaming identity according to the home network prefix of described terminal node, the PMIP territory under the described peer node according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element with described first Packet Generation to described visit PMIP territory.
Further, said method can also have following characteristics:
After terminal node roams into the visit PMIP territory of supporting routing optimality from the ownership PMIP territory of supporting routing optimality, Mobile Access Gateway under the described terminal node sends agent binding update to mapping server, described mapping server directly or via described Mobile Access Gateway is sent to Interworking gateway under the described terminal node with described roaming identity, described Interworking gateway with described roaming identity notice to described ownership PMIP territory.
Further, said method can also have following characteristics:
The mapping server in described visit PMIP territory is with home network prefix and the binding of described roaming identity of described terminal node;
When described peer node is positioned at described visit PMIP territory, described peer node sends in the first process data packet to terminal node, the home network prefix that Mobile Access Gateway under the described peer node uses described terminal node is inquired about the information of Mobile Access Gateway under the described terminal node to mapping server, the mapping server in described visit PMIP territory inquires described roaming identity according to described home network prefix, realizes sending to the data of peer node in described visit PMIP territory.
Further, said method can also have following characteristics:
When described peer node is positioned at described visit PMIP territory, described terminal node sends in the first process data packet to peer node, described terminal node sends first packet to the Mobile Access Gateway in described visit PMIP territory, this Mobile Access Gateway inquires the peer node positional information to the mapping server in described visit PMIP territory, and described first packet is sent to described peer node via the Mobile Access Gateway under the described peer node.
Further, said method can also have following characteristics:
When described peer node is positioned at PMIP territory outside the described visit PMIP territory, described terminal node sends in the first process data packet to peer node, described terminal node sends first packet to the Mobile Access Gateway in described visit PMIP territory, this Mobile Access Gateway is to the mapping server inquiry peer node positional information in described visit PMIP territory and after receiving the inter-domain communication indication that described mapping server sends, with the PMIP territory of described first Packet Generation under the described peer node.
Further, said method can also have following characteristics:
When described peer node is positioned at described ownership PMIP territory, after the Mobile Access Gateway in described ownership PMIP territory receives that described peer node mails to the first packet of described terminal node, know described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to the mapping server in described ownership PMIP territory, according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element with the Mobile Access Gateway of described first Packet Generation under the terminal node described in the described visit PMIP territory, the Mobile Access Gateway under the terminal node described in the described visit PMIP territory with described first Packet Generation to described terminal node.
Further, said method can also have following characteristics:
When described peer node is positioned at the PMIP territory of other support routing optimality outside described ownership PMIP territory and the described visit PMIP territory, the Interworking gateway in described ownership PMIP territory is after the Interworking gateway in PMIP territory receives that described peer node mails to the first packet of described terminal node under the described peer node, know described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to the mapping server in described ownership PMIP territory, according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element with the Mobile Access Gateway of described first Packet Generation under the terminal node described in the described visit PMIP territory, the Mobile Access Gateway under the terminal node described in the described visit PMIP territory with described first Packet Generation to described terminal node.
Further, said method can also have following characteristics:
When described peer node is positioned at the PMIP territory of the support routing optimality outside described ownership PMIP territory and the described visit PMIP territory, after the Interworking gateway in the PMIP territory under the described peer node receives that described peer node mails to the first packet of described terminal node, Interworking gateway via described ownership PMIP territory uses the home network prefix of described terminal node to inquire about the positional information of described terminal node and know described roaming identity to the mapping server in described ownership PMIP territory, the Interworking gateway in the PMIP territory under the described peer node according to described roaming identity with the Mobile Access Gateway of described first Packet Generation under the terminal node described in the described visit PMIP territory, the Mobile Access Gateway under the terminal node described in the described visit PMIP territory with described first Packet Generation to described terminal node.
Further, said method can also have following characteristics:
After knowing described roaming identity during positional information that the Interworking gateway in described ownership PMIP territory is inquired about from described terminal node to the mapping server in described ownership PMIP territory, with described roaming identity notice Interworking gateway under the peer node described in the PMIP territory under the described peer node; After Interworking gateway under the described peer node receives that described peer node mails to the follow-up data bag of described terminal node, directly be sent to described visit PMIP territory.
Further, said method can also have following characteristics:
When described peer node is positioned at the described conventional P MIP territory that belongs to outside PMIP territory and the described visit PMIP territory, the Interworking gateway in described ownership PMIP territory is after the local mobile anchor in PMIP territory receives that described peer node mails to the first packet of described terminal node under the described peer node, know described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to the mapping server in described ownership PMIP territory, according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element with the Mobile Access Gateway of described first Packet Generation under the terminal node described in the described visit PMIP territory, the Mobile Access Gateway under the terminal node described in the described visit PMIP territory with described first Packet Generation to described terminal node.
Further, said method can also have following characteristics:
After the local mobile anchor in PMIP territory receives that described peer node mails to the follow-up data bag of described terminal node under the described peer node, be forwarded to described visit PMIP territory via described ownership PMIP territory.
Further, said method can also have following characteristics:
Described terminal node switches to the Suitable For Moving-goal Problems IAD from the source Mobile Access Gateway in described visit PMIP territory, the mapping server in described visit PMIP territory via the Interworking gateway in described visit PMIP territory and described ownership PMIP territory with the address notification of the described Suitable For Moving-goal Problems IAD mapping server to described ownership PMIP territory, this mapping server is with the Mobile Access Gateway in the extremely described ownership of the address notification PMIP territory of described Suitable For Moving-goal Problems IAD, this Mobile Access Gateway is the address notification of the described Suitable For Moving-goal Problems IAD Interworking gateway to described ownership PMIP territory, and this Interworking gateway is with the address notification of the described Suitable For Moving-goal Problems IAD Mobile Access Gateway under the described peer node.
In order to solve the problems of the technologies described above, the present invention also provides a kind of node communication system when the internetwork roaming of PMIP territory, wherein, comprise the ownership PMIP territory of the support routing optimality under the terminal node, peer node, terminal node, the visit PMIP territory of the support routing optimality under the terminal node, the PMIP territory under the described peer node;
Described visit PMIP territory, be used for after terminal node roams into the visit PMIP territory of supporting routing optimality from the ownership PMIP territory of supporting routing optimality, bind for the roaming identity of the described terminal node of described terminal node distribution expression positional information in described visit PMIP territory and with the home network prefix of described roaming identity and described terminal node, also this roaming identity is notified extremely described ownership PMIP territory;
Described ownership PMIP territory is used for home network prefix and the binding of described roaming identity with described terminal node; Also be used in the first transmission of data packets of described peer node to described terminal node, inquire described roaming identity according to the home network prefix of described terminal node;
PMIP territory under the described peer node also is used for according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element described first Packet Generation to described visit PMIP territory.
Further, said system can also have following characteristics:
Described visit PMIP territory comprises mapping server; Described ownership PMIP territory comprises mapping server;
The mapping server in described visit PMIP territory is used to described terminal node to distribute the roaming identity of the described terminal node of expression positional information in described visit PMIP territory and the home network prefix of described roaming identity and described terminal node is bound;
The mapping server in described ownership PMIP territory after being used for knowing the roaming identity of described terminal node from described visit PMIP territory, and is bound the home network prefix of described roaming identity and described terminal node.
Further, said system can also have following characteristics:
Described ownership PMIP territory comprises Mobile Access Gateway; Described visit PMIP territory comprises Mobile Access Gateway;
The Mobile Access Gateway in described ownership PMIP territory, after being used for receiving that described peer node mails to the first packet of described terminal node, know described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to the mapping server in described ownership PMIP territory, and described first packet is sent to the Mobile Access Gateway in described visit PMIP territory via the Interworking gateway in described ownership PMIP territory.
Further, said system can also have following characteristics:
Described ownership PMIP territory comprises Interworking gateway;
The Interworking gateway in described ownership PMIP territory, after being used for receiving that described peer node mails to the first packet of described terminal node, know described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to the mapping server in described ownership PMIP territory, and with the Interworking gateway of described first Packet Generation to described visit PMIP territory.
Further, said system can also have following characteristics:
The Interworking gateway in described ownership PMIP territory also for after knowing described roaming identity from the mapping server in described ownership PMIP territory, is notified described roaming identity to described visit PMIP territory.
Further, said system can also have following characteristics:
The PMIP territory comprises Interworking gateway under the described peer node;
The Interworking gateway in PMIP territory under the described peer node, be used for receiving that described peer node is behind the first packet of described terminal node transmission, after knowing described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to described ownership PMIP territory, according to described roaming identity with described first Packet Generation to described visit territory.
In order to solve the problems of the technologies described above, the present invention also provides a kind of mapping server, and wherein, described mapping server comprises the roaming identity processing module; Described roaming identity processing module, when being used for the mapping server in visit PMIP territory affiliated after described mapping server is as the terminal node roaming, bind for the roaming identity of the described terminal node of described terminal node distribution expression positional information in described visit PMIP territory and with the home network prefix of described roaming identity and described terminal node, also this roaming identity is notified extremely described ownership PMIP territory.
In order to solve the problems of the technologies described above, the present invention also provides a kind of mapping server, and wherein, described mapping server comprises the roaming identity processing module; Described roaming identity processing module, be used at described mapping server during as the mapping server in the ownership PMIP territory of terminal node, after receiving that the home network prefix of using described terminal node is inquired about the request of described terminal node position to mapping server, provide described roaming identity to the requesting party.
This programme provides solution for the communication issue of node when the internetwork roaming of PMIP territory.
Description of drawings
Fig. 1 is the structure system schematic diagram of existing PMIP system;
Fig. 2 is the system architecture diagram of PMIP territory intermediate node roaming;
Fig. 3 is the schematic diagram of the node communication method when the internetwork roaming of PMIP territory;
The schematic diagram of Fig. 4 method execution mode one that to be terminal upgrade in the registration of the PMIP territory internetwork roaming of supporting routing optimality and position;
The schematic diagram of Fig. 5 method execution mode two that to be terminal upgrade in the registration of the PMIP territory internetwork roaming of supporting routing optimality and position;
Fig. 6 is the routing optimization method schematic diagram of opposite end inter-node communication when being positioned at the visit PMIP territory of terminal;
Fig. 7 is the routing optimization method schematic diagram of opposite end inter-node communication when being positioned at the ownership PMIP territory of terminal;
Fig. 8 is the routing optimization method schematic diagram of opposite end inter-node communication when being positioned at the PMIP territory that other support routing optimalities;
Fig. 9 is the routing optimization method schematic diagram of opposite end inter-node communication when being positioned at the PMIP territory that other support routing optimalities;
Figure 10 is the routing optimization method schematic diagram of opposite end inter-node communication when being positioned at conventional P MIP territory;
Figure 11 is that terminal is striden the method schematic diagram that MAG switches rear address information renewal in the visit territory.
Embodiment
As shown in Figure 3, the node communication method when the internetwork roaming of PMIP territory comprises:
After terminal node roams into the visit PMIP territory of supporting routing optimality from the ownership PMIP territory of supporting routing optimality, described visit PMIP territory is that described terminal node distributes the roaming identity of the described terminal node of expression positional information in described visit PMIP territory and the home network prefix of described roaming identity and described terminal node is bound, also this roaming identity is notified to described ownership PMIP territory, described ownership PMIP territory is with home network prefix and the binding of described roaming identity of described terminal node;
Described peer node is to the first transmission of data packets of described terminal node, described ownership PMIP territory inquires described roaming identity according to the home network prefix of described terminal node, the PMIP territory under the described peer node according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element with described first Packet Generation to described visit PMIP territory.
After terminal node roams into the visit PMIP territory of supporting routing optimality from the ownership PMIP territory of supporting routing optimality, Mobile Access Gateway under the described terminal node sends agent binding update to mapping server, described mapping server directly or via described Mobile Access Gateway is sent to Interworking gateway under the described terminal node with described roaming identity, described Interworking gateway with described roaming identity notice to described ownership PMIP territory.Describe in detail below by Fig. 4 and Fig. 5.
With reference to the embodiment of the method one that figure 4 terminals are upgraded in registration and the position of the PMIP territory internetwork roaming of supporting routing optimality, the specific implementation step is as follows:
Step 401, terminal node carries out access authentication in the visit territory.
Terminal can be initiated the access authentication flow process by MAG2 (can be responsible for authentication by MAPS in this process, perhaps be responsible for authentication by AAA, perhaps be responsible for authentication by other network element), and the MAPS2 in visit territory may need to be undertaken alternately the user being authenticated by the ownership MAPS1 of Interworking gateway IGW1 and IGW2 and terminal node, so MAPS2 will get access to the HNP of terminal node.
Step 402, MAG2 initiates agent binding update to MAPS2, and MAPS2 is that terminal node distributes roaming identity, this terminal roaming sign can also be bound with terminal HNP.
This roaming identity is the sign that MAPS2 distributes, form can be an IP address, packet take this IP address as destination address outside this PMIP territory will be routed the so far IGW network element in PMIP territory, and IGW can to judge this packet according to this roaming identity be to mail to the terminal that roams into this territory.
Roaming identity is the sign that MAPS2 distributes, and form can be an IP address, and the packet take this IP address as destination address will be routed the MAG network element that the roamer was accessed in the PMIP territory so far.This sign can be the IP address of MAG, also can be the CoA (annotating: in the case, if the roamer has changed the MAG of access, then need to redistribute roaming identity, and notice is to the related network elements of home domain) that provides in the agent binding update messages.
Step 403, MAPS2 returns to MAG2 with the agent binding response, meeting carried terminal HNP, roaming identity in this message.The IP address that also need carry MAPS1 this moment is so that follow-up MAG upgrades to MAPS1 initiating terminal position.
Step 404～406, MAG2 upgrades to MAPS1 initiating terminal position, and this message may be passed through Interworking gateway IGW1 and IGW2, and the terminal roaming sign also can be carried to MAPS1 simultaneously, and MAPS1 can bind this terminal roaming sign and terminal HNP.
Step 407～409, MAPS1 upgrades response to MAG2 transmitting terminal position, and this message may be passed through Interworking gateway IGW1 and IGW2.
Step 410, MAG2 sends router advertisement message to terminal, carries the HNP of roaming terminal.This step may be sent after completing steps 403, does not need to wait for that updating of terminal position response returns.
With reference to the embodiment of the method two that figure 5 terminals are upgraded in registration and the position of the PMIP territory internetwork roaming of supporting routing optimality, the specific implementation step is as follows:
Step 501, terminal node carries out access authentication in the visit territory.
Terminal can be initiated access authentication to MAPS2 by MAG2, and the MAPS2 in visit territory may need to be undertaken alternately the user being authenticated by the ownership MAPS1 of Interworking gateway IGW1 and IGW2 and terminal node, so MAPS2 will get access to the HNP of terminal node.
Step 502, MAG2 initiates agent binding update to MAPS2, and this moment, MAPS2 can distribute a roaming identity for terminal node, this terminal roaming sign can be bound with terminal HNP simultaneously.
Step 503～505, MAPS2 upgrades to MAPS1 initiating terminal position, and this message may be passed through Interworking gateway IGW1 and IGW2, and the terminal roaming sign also can be carried to MAPS1 simultaneously, and MAPS1 can bind this terminal roaming sign and terminal HNP.
Step 506～508, MAPS1 upgrades response to MAPS2 transmitting terminal position, and this message may be passed through Interworking gateway IGW1 and IGW2.
Step 509, MAPS2 returns to MAG2 with the agent binding response.This message can be in the rear execution of step 402
Step 510, MAG2 sends router advertisement message to terminal, carries the HNP of roaming terminal.
After terminal was finished the registration and position renewal of PMIP territory internetwork roaming, the mapping relations of constructing in each network element in the system were as follows:
Case3：
MAPS1:MN sign, HNP, roaming identity
The IGW1:MN sign, roaming identity, HNP
MAPS2:MN sign, HNP, roaming identity, CoA
MAG2:MN sign, HNP, CoA, roaming identity (only Fig. 3)
The IGW2:MN sign, roaming identity
MAG3:HNP, roaming identity
IGW3:HNP, roaming identity
During hereinafter method was described, first packet referred to carry out between terminal node and the peer node packet that sends in the routed path deterministic process, and the follow-up data bag refers to determine the packet behind the routed path.
CN is positioned at the situation in the visit PMIP territory of MN.
Described peer node sends in the first process data packet to terminal node, the home network prefix that Mobile Access Gateway under the peer node uses described terminal node is inquired about the information of Mobile Access Gateway under the described terminal node to mapping server, the mapping server in described visit PMIP territory inquires described roaming identity according to described home network prefix, realizes sending to the data of peer node in described visit PMIP territory.
Described terminal node sends in the first process data packet to peer node, terminal node sends first packet to the Mobile Access Gateway in described visit PMIP territory, this Mobile Access Gateway inquires the peer node positional information to the mapping server in described visit PMIP territory, and described first packet is sent to described peer node via the Mobile Access Gateway under the described peer node.
Be elaborated below by Fig. 6.
The routing optimization method of inter-node communication when being positioned at the visit PMIP territory of terminal with reference to figure 6 opposite ends of the present invention, the specific implementation step is as follows:
Step 601 need to be with first Packet Generation during to peer node when terminal, and terminal at first can be with first Packet Generation to MAG2.
Step 602, MAG2 can inquire about to MAPS2 the positional information of peer node.
Step 603, also in this PMIP territory, then MAPS2 can return to MAG2 with the positional information (for example: CoA or current service MAG address) of peer node to MAPS2 discovery peer node.
Step 604, MAG2 is with the MAG3 of first package forward to peer node.
Step 605, MAG3 with first data retransmission to peer node.
MN is that MN is sent to MAG2 to the transmission path of the follow-up data bag that CN sends, and MAG2 is sent to MAG3, and MAG3 is sent to CN.
Step 606, when peer node need to send first packet to terminal node, peer node can be with first Packet Generation to MAG3.
Step 607, the address information that MAG3 can use the HNP of terminal to inquire about its current MAG to MAPS2, MAPS2 can inquire about according to the HNP of terminal, and discovery is the terminal that roams into this territory, and finally inquires the positional information of terminal.
Step 608, MAPS2 returns to MAG3 with the positional information of terminal.
Step 609, MAG3 with first package forward to MAG2.
Step 610, MAG2 with first package forward to terminal node.
CN is that CN is sent to MAG3 to the transmission path of the follow-up first packet that MN sends, and MAG3 is sent to MAG2, and MAG2 is sent to CN.
CN is positioned in the situation in ownership PMIP territory of MN.
MN is to the CN direction, terminal node sends in the first process data packet to peer node, described terminal node sends first packet to the Mobile Access Gateway in described visit PMIP territory, this Mobile Access Gateway is to the mapping server inquiry peer node positional information in described visit PMIP territory and after receiving the inter-domain communication indication that described mapping server sends, with the PMIP territory of described first Packet Generation under the described peer node.
CN is to the MN direction, after the Mobile Access Gateway in described ownership PMIP territory receives that described peer node mails to the first packet of described terminal node, know described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to the mapping server in described ownership PMIP territory, according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element with the Mobile Access Gateway of described first Packet Generation under the terminal node described in the described visit PMIP territory, the Mobile Access Gateway under the terminal node described in the described visit PMIP territory with described first Packet Generation to described terminal node.
Communication method between nodes when being positioned at the ownership PMIP territory of terminal with reference to figure 7 opposite ends, the specific implementation step is as follows:
Step 701 need to be with first Packet Generation during to peer node when terminal, and terminal at first can be with Packet Generation to MAG2.
Step 702, MAG2 can inquire about to MAPS2 the positional information of peer node.
Step 703, MAPS2 finds it not in this PMIP territory according to the address information of peer node, then MAPS2 can return the inter-domain communication indication to MAG2.
Step 704, MAG2 transmits first packet to Interworking gateway IGW2.
Step 705, IGW2 with first package forward to IGW1.
Step 706, IGW1 is to the positional information of MAPS1 inquiry peer node.
Step 707, MAPS1 returns to IGW1 with the positional information of peer node.
Step 708～709, IGW1 to MAG3, and finally is forwarded to peer node with first package forward.
The transmission path of the follow-up data bag of MN to CN direction is MN-MAG2-IGW2-IGW1-MAG3-CN.
Step 710, when peer node need to send first packet to terminal node, peer node can be with first Packet Generation to MAG3.
Step 711, MAG3 uses the HNP of terminal to inquire about its positional information to MAPS1, and MAPS1 inquires the roaming identity of terminal according to terminal HNP.
Step 712, MAPS1 returns to MAG3 with the terminal roaming sign.
Step 713, MAG3 identifies first package forward to MAG2 according to terminal roaming.
Step 714, MAG2 arrives terminal with package forward.
All can use MAG3 and MAG2 directly to transmit for follow-up packet.The transmission path of the follow-up data bag of CN to MN direction is CN-MAG3-MAG2-MN.
CN is positioned at a kind of implementation in the situation in PMIP territory of the support routing optimality except the visit territory of the home domain of MN and MN.
MN is to the CN direction, terminal node sends in the first process data packet to peer node, described terminal node sends first packet to the Mobile Access Gateway in described visit PMIP territory, this Mobile Access Gateway is to the mapping server inquiry peer node positional information in described visit PMIP territory and after receiving the inter-domain communication indication that described mapping server sends, with the PMIP territory of described first Packet Generation under the described peer node.
CN is to the MN direction, the Interworking gateway in described ownership PMIP territory is after the Interworking gateway in PMIP territory receives that described peer node mails to the first packet of described terminal node under the described peer node, know described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to the mapping server in described ownership PMIP territory, according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element with the Mobile Access Gateway of described first Packet Generation under the terminal node described in the described visit PMIP territory, the Mobile Access Gateway under the terminal node described in the described visit PMIP territory with described first Packet Generation to described terminal node.
The routing optimization method of inter-node communication when being positioned at the PMIP territory that other support routing optimalities with reference to figure 8 opposite ends, the specific implementation step is as follows:
Step 801 need to be with first Packet Generation during to peer node when terminal, and terminal at first can be with first Packet Generation to MAG2.
Step 802, MAG2 can inquire about to MAPS2 the positional information of peer node.
Step 803, MAPS2 finds it not in this PMIP territory according to the address information of peer node, then MAPS2 can return the inter-domain communication indication to MAG2.
Step 804, MAG2 transmits first packet to Interworking gateway IGW2.
Step 805, IGW2 is forwarded to MAG3 with first packet through IGW3, and finally is transmitted to peer node.
MN is MN-MAG2-IGW2-IGW3-MAG3-CN to the transmission path of the follow-up data bag of CN direction.
Step 806, when peer node need to send first packet to terminal node, peer node can be with Packet Generation to MAG3, and MAG3 can be transmitted to first packet the ownership Interworking gateway IGW1 of terminal by IGW3.
Step 807, IGW1 uses the HNP of terminal to inquire about its current location information to MAPS1, and MAPS1 inquires the roaming identity of terminal according to terminal HNP.
Step 808, MAPS1 returns to IGW1 with the terminal roaming sign.
Step 809, IGW1 returns to IGW3 with the terminal roaming sign.
Step 810, IGW1 with first package forward to MAG2.
Step 811, MAG2 with first package forward to terminal.
Follow-up package forward path will be transmitted to terminal through IGW3 and MAG2 by MAG3.CN is CN-MAG3-IGW3-MAPS2-MAG2-MN to the transmission path of the follow-up data bag of MN direction.
CN is positioned at the another kind of implementation in the situation in PMIP territory of the support routing optimality except the home domain of MN and MN visit territory.
MN is to the CN direction, terminal node sends in the first process data packet to peer node, described terminal node sends first packet to the Mobile Access Gateway in described visit PMIP territory, this Mobile Access Gateway is to the mapping server inquiry peer node positional information in described visit PMIP territory and after receiving the inter-domain communication indication that described mapping server sends, with the PMIP territory of described first Packet Generation under the described peer node.
CN is to the MN direction, after the Interworking gateway in the PMIP territory under the described peer node receives that described peer node mails to the first packet of described terminal node, Interworking gateway via described ownership PMIP territory uses the home network prefix of described terminal node to inquire about the positional information of described terminal node and know described roaming identity to the mapping server in described ownership PMIP territory, the Interworking gateway in the PMIP territory under the described peer node according to described roaming identity with the Mobile Access Gateway of described first Packet Generation under the terminal node described in the described visit PMIP territory, the Mobile Access Gateway under the terminal node described in the described visit PMIP territory with described first Packet Generation to described terminal node.
The routing optimization method of inter-node communication when being positioned at the PMIP territory that other support routing optimalities with reference to figure 9 opposite ends, the specific implementation step is as follows:
Step 901 need to be with first Packet Generation during to peer node when terminal, and terminal at first can be with first Packet Generation to MAG2.
Step 902, MAG2 can inquire about to MAPS2 the current location information of peer node.
Step 903, MAPS2 finds it not in this PMIP territory according to the address information of peer node, then MAPS2 can return the inter-domain communication indication to MAG2.
Step 904, MAG2 transmits first packet to Interworking gateway IGW2.
Step 905, IGW2 is forwarded to MAG3 with first packet through IGW3, and finally is forwarded to peer node.
MN is MN-MAG2-IGW2-IGW3-MAG3-CN to the transmission path of the follow-up data bag of CN direction.
Step 906, when peer node need to send first packet to terminal node, peer node can be with first Packet Generation to MAG3, and MAG3 can carry out the terminal location inquiry to the home network of terminal node by IGW3, the ownership Interworking gateway IGW1 that this message can incoming terminal.
Step 907, IGW1 uses the HNP of terminal to inquire about its current location information to MAPS1, and MAPS1 inquires the roaming identity of terminal according to terminal HNP.
Step 908, MAPS1 returns to IGW1 with the terminal roaming sign.
Step 909, IGW1 returns to IGW3 with the terminal roaming sign.
Step 910, MAG3 with first package forward to MAG2.
Step 911, MAG2 with first package forward to terminal.
Follow-up package forward path directly is forwarded to IGW3 and MAG2 by MAG3, and finally is transmitted to terminal.
CN is positioned at the situation in the conventional P MIP territory except home domain and visit territory of MN.
MN is to the CN direction, terminal node sends in the first process data packet to peer node, described terminal node sends first packet to the Mobile Access Gateway in described visit PMIP territory, this Mobile Access Gateway is to the mapping server inquiry peer node positional information in described visit PMIP territory and after receiving the inter-domain communication indication that described mapping server sends, with the PMIP territory of described first Packet Generation under the described peer node.
CN is to the MN direction, the Interworking gateway in described ownership PMIP territory is after the local mobile anchor in PMIP territory receives that described peer node mails to the first packet of described terminal node under the described peer node, know described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to the mapping server in described ownership PMIP territory, according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element with the Mobile Access Gateway of described first Packet Generation under the terminal node described in the described visit PMIP territory, the Mobile Access Gateway under the terminal node described in the described visit PMIP territory with described first Packet Generation to described terminal node.
The routing optimization method of inter-node communication when being positioned at conventional P MIP territory with reference to Figure 10 opposite end, the specific implementation step is as follows:
Step 1001 need to be with first Packet Generation during to peer node when terminal, and terminal at first can be with first Packet Generation to MAG2.
Step 1002, MAG2 can inquire about to MAPS2 the current location information of peer node.
Step 1003, MAPS2 finds it not in this PMIP territory according to the address information of peer node, then MAPS2 can return the inter-domain communication indication to MAG2.
Step 1004, MAG2 transmits first packet to Interworking gateway IGW2.
Step 1005, IGW2 is the LMA3 of first package forward to peer node, LMA3 by the tunnel with first Packet Generation to MAG3, and finally be transmitted to peer node.
MN is MN-MAG2-IGW2-IGW3-MAG3-CN to the transmission path of the follow-up data bag of CN direction.
Step 1006, when peer node need to send first packet to terminal node, peer node can be with first Packet Generation to MAG3, and MAG3 use the tunnel with first package forward to LMA3, mail to the home domain of terminal by LMA3 subsequently and intercepted and captured by IGW1.
Step 1007, IGW1 uses the HNP of terminal to inquire about its current location information to MAPS1, and MAPS1 inquires the roaming identity of terminal according to terminal HNP.
Step 1008, MAPS1 returns to IGW1 with the terminal roaming sign.
Step 1009, IGW1 may return to LMA with the terminal roaming sign, but LMA is because can't resolve this message, so can ignore processing.
Step 1010, IGW1 with first package forward to MAG2.
Step 1011, MAG2 arrives terminal with first package forward.
Step 1012, follow-up package forward path still need to transmit through the Interworking gateway IGW1 of terminal attaching net, then arrive MAG2.After the local mobile anchor in PMIP territory receives that described peer node mails to the follow-up data bag of described terminal node under the described peer node, be forwarded to described visit PMIP territory via described ownership PMIP territory.
Described terminal node switches to the Suitable For Moving-goal Problems IAD from the source Mobile Access Gateway in described visit PMIP territory, the mapping server in described visit PMIP territory via the Interworking gateway in described visit PMIP territory and described ownership PMIP territory with the address notification of the described Suitable For Moving-goal Problems IAD mapping server to described ownership PMIP territory, this mapping server is with the Mobile Access Gateway in the extremely described ownership of the address notification PMIP territory of described Suitable For Moving-goal Problems IAD, this Mobile Access Gateway is the address notification of the described Suitable For Moving-goal Problems IAD Interworking gateway to described ownership PMIP territory, and this Interworking gateway is with the address notification of the described Suitable For Moving-goal Problems IAD Mobile Access Gateway under the described peer node.
Stride MAG with reference to Figure 11 terminal in the visit territory and switch the method that rear address information is upgraded, the specific implementation step is as follows:
Step 1101, terminal switches to MAG4 in the visit territory by MAG2.
Step 1102, for guarantee with peer node between communicate by letter smoothly, MAPS2 may send to IGW1 and MAPS1 with terminal positional information (for example: new CoA and/or the address of MAG4).
Step 1103, MAPS1 is updated to terminal positional information (for example: new CoA and/or the address of MAG4) on the MAG1.
Step 1104, MAG1 is updated to terminal positional information (for example: new CoA and/or the address of MAG4) on the IGW1.
Step 1105, IGW1 the most at last terminal positional information (for example: new CoA and/or the address of MAG4) is updated to above the MAG3.
The node communication system when PMIP territory internetwork roaming corresponding with said method comprises the ownership PMIP territory of the support routing optimality under the terminal node, peer node, terminal node, the visit PMIP territory of the support routing optimality under the terminal node, the PMIP territory under the described peer node.That describes in the function of each component units and executive mode and the said method is identical, repeats no more herein.
The mapping server that provides in this programme comprises the roaming identity processing module.
Described roaming identity processing module, when being used for the mapping server in visit PMIP territory affiliated after described mapping server is as the terminal node roaming, bind for the roaming identity of the described terminal node of described terminal node distribution expression positional information in described visit PMIP territory and with the home network prefix of described roaming identity and described terminal node, also this roaming identity is notified extremely described ownership PMIP territory.
Described roaming identity processing module, be used at described mapping server during as the mapping server in the ownership PMIP territory of terminal node, after receiving that the home network prefix of using described terminal node is inquired about the request of described terminal node position to mapping server, provide described roaming identity to the requesting party.
Need to prove that in the situation of not conflicting, the embodiment among the application and the feature among the embodiment be combination in any mutually.
Certainly; the present invention also can have other various embodiments; in the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
One of ordinary skill in the art will appreciate that all or part of step in the said method can come the instruction related hardware to finish by program, described program can be stored in the computer-readable recording medium, such as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.

Claims (20)

1. node communication method when the internetwork roaming of PMIP territory, wherein,
After terminal node roams into the visit PMIP territory of supporting routing optimality from the ownership PMIP territory of supporting routing optimality, described visit PMIP territory is that described terminal node distributes the roaming identity of the described terminal node of expression positional information in described visit PMIP territory and the home network prefix of described roaming identity and described terminal node is bound, also this roaming identity is notified to described ownership PMIP territory, described ownership PMIP territory is with home network prefix and the binding of described roaming identity of described terminal node;
Described peer node is to the first transmission of data packets of described terminal node, described ownership PMIP territory inquires described roaming identity according to the home network prefix of described terminal node, the PMIP territory under the described peer node according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element with described first Packet Generation to described visit PMIP territory.
2. the method for claim 1 is characterized in that,
After terminal node roams into the visit PMIP territory of supporting routing optimality from the ownership PMIP territory of supporting routing optimality, Mobile Access Gateway under the described terminal node sends agent binding update to mapping server, described mapping server directly or via described Mobile Access Gateway is sent to Interworking gateway under the described terminal node with described roaming identity, described Interworking gateway with described roaming identity notice to described ownership PMIP territory.
3. the method for claim 1 is characterized in that,
The mapping server in described visit PMIP territory is with home network prefix and the binding of described roaming identity of described terminal node;
When described peer node is positioned at described visit PMIP territory, described peer node sends in the first process data packet to terminal node, the home network prefix that Mobile Access Gateway under the described peer node uses described terminal node is inquired about the information of Mobile Access Gateway under the described terminal node to mapping server, the mapping server in described visit PMIP territory inquires described roaming identity according to described home network prefix, realizes sending to the data of peer node in described visit PMIP territory.
4. the method for claim 1 is characterized in that,
When described peer node is positioned at described visit PMIP territory, described terminal node sends in the first process data packet to peer node, described terminal node sends first packet to the Mobile Access Gateway in described visit PMIP territory, this Mobile Access Gateway inquires the peer node positional information to the mapping server in described visit PMIP territory, and described first packet is sent to described peer node via the Mobile Access Gateway under the described peer node.
5. the method for claim 1 is characterized in that,
When described peer node is positioned at PMIP territory outside the described visit PMIP territory, described terminal node sends in the first process data packet to peer node, described terminal node sends first packet to the Mobile Access Gateway in described visit PMIP territory, this Mobile Access Gateway is to the mapping server inquiry peer node positional information in described visit PMIP territory and after receiving the inter-domain communication indication that described mapping server sends, with the PMIP territory of described first Packet Generation under the described peer node.
6. the method for claim 1 is characterized in that,
When described peer node is positioned at described ownership PMIP territory, after the Mobile Access Gateway in described ownership PMIP territory receives that described peer node mails to the first packet of described terminal node, know described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to the mapping server in described ownership PMIP territory, according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element with the Mobile Access Gateway of described first Packet Generation under the terminal node described in the described visit PMIP territory, the Mobile Access Gateway under the terminal node described in the described visit PMIP territory with described first Packet Generation to described terminal node.
7. the method for claim 1 is characterized in that,
When described peer node is positioned at the PMIP territory of other support routing optimality outside described ownership PMIP territory and the described visit PMIP territory, the Interworking gateway in described ownership PMIP territory is after the Interworking gateway in PMIP territory receives that described peer node mails to the first packet of described terminal node under the described peer node, know described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to the mapping server in described ownership PMIP territory, according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element with the Mobile Access Gateway of described first Packet Generation under the terminal node described in the described visit PMIP territory, the Mobile Access Gateway under the terminal node described in the described visit PMIP territory with described first Packet Generation to described terminal node.
8. the method for claim 1 is characterized in that,
When described peer node is positioned at the PMIP territory of the support routing optimality outside described ownership PMIP territory and the described visit PMIP territory, after the Interworking gateway in the PMIP territory under the described peer node receives that described peer node mails to the first packet of described terminal node, Interworking gateway via described ownership PMIP territory uses the home network prefix of described terminal node to inquire about the positional information of described terminal node and know described roaming identity to the mapping server in described ownership PMIP territory, the Interworking gateway in the PMIP territory under the described peer node according to described roaming identity with the Mobile Access Gateway of described first Packet Generation under the terminal node described in the described visit PMIP territory, the Mobile Access Gateway under the terminal node described in the described visit PMIP territory with described first Packet Generation to described terminal node.
9. such as claim 7 or 8 described methods, it is characterized in that,
After knowing described roaming identity during positional information that the Interworking gateway in described ownership PMIP territory is inquired about from described terminal node to the mapping server in described ownership PMIP territory, with described roaming identity notice Interworking gateway under the peer node described in the PMIP territory under the described peer node; After Interworking gateway under the described peer node receives that described peer node mails to the follow-up data bag of described terminal node, directly be sent to described visit PMIP territory.
10. the method for claim 1 is characterized in that,
When described peer node is positioned at the described conventional P MIP territory that belongs to outside PMIP territory and the described visit PMIP territory, the Interworking gateway in described ownership PMIP territory is after the local mobile anchor in PMIP territory receives that described peer node mails to the first packet of described terminal node under the described peer node, know described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to the mapping server in described ownership PMIP territory, according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element with the Mobile Access Gateway of described first Packet Generation under the terminal node described in the described visit PMIP territory, the Mobile Access Gateway under the terminal node described in the described visit PMIP territory with described first Packet Generation to described terminal node.
11. method as claimed in claim 10 is characterized in that,
After the local mobile anchor in PMIP territory receives that described peer node mails to the follow-up data bag of described terminal node under the described peer node, be forwarded to described visit PMIP territory via described ownership PMIP territory.
12. the method for claim 1 is characterized in that,
Described terminal node switches to the Suitable For Moving-goal Problems IAD from the source Mobile Access Gateway in described visit PMIP territory, the mapping server in described visit PMIP territory via the Interworking gateway in described visit PMIP territory and described ownership PMIP territory with the address notification of the described Suitable For Moving-goal Problems IAD mapping server to described ownership PMIP territory, this mapping server is with the Mobile Access Gateway in the extremely described ownership of the address notification PMIP territory of described Suitable For Moving-goal Problems IAD, this Mobile Access Gateway is the address notification of the described Suitable For Moving-goal Problems IAD Interworking gateway to described ownership PMIP territory, and this Interworking gateway is with the address notification of the described Suitable For Moving-goal Problems IAD Mobile Access Gateway under the described peer node.
13. node communication system when the internetwork roaming of PMIP territory, wherein, comprise the ownership PMIP territory of the support routing optimality under the terminal node, peer node, terminal node, the visit PMIP territory of the support routing optimality under the terminal node, the PMIP territory under the described peer node;
Described visit PMIP territory, be used for after terminal node roams into the visit PMIP territory of supporting routing optimality from the ownership PMIP territory of supporting routing optimality, bind for the roaming identity of the described terminal node of described terminal node distribution expression positional information in described visit PMIP territory and with the home network prefix of described roaming identity and described terminal node, also this roaming identity is notified extremely described ownership PMIP territory;
Described ownership PMIP territory is used for home network prefix and the binding of described roaming identity with described terminal node; Also be used in the first transmission of data packets of described peer node to described terminal node, inquire described roaming identity according to the home network prefix of described terminal node;
PMIP territory under the described peer node also is used for according to the Mobile Access Gateway of described roaming identity under the terminal node described in the described visit PMIP territory as the purpose network element described first Packet Generation to described visit PMIP territory.
14. system as claimed in claim 13 is characterized in that,
Described visit PMIP territory comprises mapping server; Described ownership PMIP territory comprises mapping server;
The mapping server in described visit PMIP territory is used to described terminal node to distribute the roaming identity of the described terminal node of expression positional information in described visit PMIP territory and the home network prefix of described roaming identity and described terminal node is bound;
The mapping server in described ownership PMIP territory after being used for knowing the roaming identity of described terminal node from described visit PMIP territory, and is bound the home network prefix of described roaming identity and described terminal node.
15. system as claimed in claim 14 is characterized in that,
Described ownership PMIP territory comprises Mobile Access Gateway; Described visit PMIP territory comprises Mobile Access Gateway;
The Mobile Access Gateway in described ownership PMIP territory, after being used for receiving that described peer node mails to the first packet of described terminal node, know described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to the mapping server in described ownership PMIP territory, and described first packet is sent to the Mobile Access Gateway in described visit PMIP territory via the Interworking gateway in described ownership PMIP territory.
16. system as claimed in claim 14 is characterized in that,
Described ownership PMIP territory comprises Interworking gateway;
The Interworking gateway in described ownership PMIP territory, after being used for receiving that described peer node mails to the first packet of described terminal node, know described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to the mapping server in described ownership PMIP territory, and with the Interworking gateway of described first Packet Generation to described visit PMIP territory.
17. system as claimed in claim 16 is characterized in that,
The Interworking gateway in described ownership PMIP territory also for after knowing described roaming identity from the mapping server in described ownership PMIP territory, is notified described roaming identity to described visit PMIP territory.
18. system as claimed in claim 14 is characterized in that,
The PMIP territory comprises Interworking gateway under the described peer node;
The Interworking gateway in PMIP territory under the described peer node, be used for receiving that described peer node is behind the first packet of described terminal node transmission, after knowing described roaming identity during positional information that the home network prefix of using described terminal node is inquired about from described terminal node to described ownership PMIP territory, according to described roaming identity with described first Packet Generation to described visit territory.
19. a mapping server, wherein,
Described mapping server comprises the roaming identity processing module;
Described roaming identity processing module, when being used for the mapping server in visit PMIP territory affiliated after described mapping server is as the terminal node roaming, bind for the roaming identity of the described terminal node of described terminal node distribution expression positional information in described visit PMIP territory and with the home network prefix of described roaming identity and described terminal node, also this roaming identity is notified extremely described ownership PMIP territory.
20. a mapping server, wherein,
Described mapping server comprises the roaming identity processing module;
Described roaming identity processing module, be used at described mapping server during as the mapping server in the ownership PMIP territory of terminal node, after receiving that the home network prefix of using described terminal node is inquired about the request of described terminal node position to mapping server, provide described roaming identity to the requesting party.
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