CN101374097B - Method and apparatus for controlling mobile node and heterogeneous network communication of communication network - Google Patents

Method and apparatus for controlling mobile node and heterogeneous network communication of communication network Download PDF

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Publication number
CN101374097B
CN101374097B CN2007100452437A CN200710045243A CN101374097B CN 101374097 B CN101374097 B CN 101374097B CN 2007100452437 A CN2007100452437 A CN 2007100452437A CN 200710045243 A CN200710045243 A CN 200710045243A CN 101374097 B CN101374097 B CN 101374097B
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communication
mobile node
edge router
information
node
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CN101374097A (en
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姚春燕
温海波
郑军
宾梵祥
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Nokia Shanghai Bell Co Ltd
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Alcatel Lucent Shanghai Bell Co Ltd
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Priority to CN2007100452437A priority Critical patent/CN101374097B/en
Priority to PCT/CN2008/001457 priority patent/WO2009026783A1/en
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements

Abstract

The invention provides a technical proposal, which is connected in the edge routers of the first-kind communication network and the second-kind communication network to control a mobile node that moves to a visit-side sub-network belonging to the first-kind communication network to communicate with a communication node in the second-kind communication network. Firstly, the edge router of the access-site sub-network responds to the second-kind communication network address by acquiring the mobile node and controls the mobile node to communicate with the communication node according to the second-kind communication network address. Preferably, the edge router of the mobile node in an attributive-side sub-network of the first-kind communication network sends the second-kind communication network address corresponding to the mobile node to the edge router of the access-site sub-network located to the mobile node.

Description

Mobile node and heterogeneous network method for communicating and device in the control communication network
Technical field
The present invention relates to the edge router in the communication network, relate in particular in the edge router of communication network and be used for controlling mobile node and heterogeneous network communication node method for communicating and device.
Background technology
Existing the Internet mainly is based on the IPv4 agreement, along with Internet user's quantity constantly increases and the requirement of internet, applications is improved constantly, network design based on the IPv6 agreement is also carried out gradually, and increasing user wishes by various terminals, be connected to Internet by wireless network anywhere, realize mobile service, in order to support to solve the demand of mobile service, the IPv6 agreement is supported mobile IP technology.
The IPv6 node is by the IPv6/IPv4 network address and protocol converter (NAT-PT, Network Address Translator-Protocol Translator) and IPv4 node communication.If the IPv6 communication network is supported the mobility of IPv6 node, promptly the IPv6 node is a mobile node, then also will dispose the mobility that home agent (Home Agents) is supported the IPv6 node in the IPv6 territory.At the initial stage of IPv6 network design, the function of the IPv6/IPv4 network address and protocol converter and home agent all realizes with the edge router of IPv6 communication network (hereinafter to be referred as " IPv6 territory ") by being connected to IPv4 communication network (hereinafter to be referred as " IPv4 territory ") usually.Fig. 1 shows network topology structure schematic diagram in the prior art, and first edge router 11, second edge router 12 and the 3rd edge router 13 are connected to three communication subnets in IPv6 territory respectively, and all are connected to the IPv4 territory.Mobile IPv 6 node (hereinafter to be referred as " mobile node ") 20 belongs to the IPv6 communication subnet that first edge router 11 is had jurisdiction over, first edge router 11 is realized the function of the IPv6/IPv4 network address and protocol converter and home agent, and mobile node 20 is via the IPv4 node communication in first edge router 11 and the IPv4 territory.The network manager distributes the IPv4 address (usually, be referred to as temporary IP v4 address set) of some to give each edge router, by each edge router dynamic assignment IPv4 address give need with the mobile IPv 6 node of IPv4 node communication.
As shown in Figure 1, first edge router 11 is that mobile node 20 distributes an IPv4 address so that mobile node 20 and IPv4 node communication usually, claim this temporary IP v4 address that IPv4 address is a mobile node 20.First edge router 11 is to IPv4 territory broadcasting route advertisement message (perhaps routing iinformation message), usually, usually the relevant information that includes its all temporary IP v4 address in this route advertisement message promptly is used for indicating first edge router 11 can receive and transmit the packet of the IPv4 address that is sent to described temporary IP v4 address set.
First edge router 11 is based upon the protocol conversion process that the packet (or the IPv4 node mails to the packet of mobile node 20) that temporary IP v4 address that mobile node 20 distributes mobile node 20 is mail to the IPv4 node is carried out from IPv6 communication protocol to IPv4 communication protocol (or IPv4 communication protocol is to IPv6 communication protocol).
If mobile node 20 moves in another communication subnet (foreign subnet or access subnet) in the IPv6 territory that second edge router 12 had jurisdiction over, mobile node 20 still will be via first edge router 11 with communicating by letter of IPv4 node.At this moment, claim first edge router 11 to be the ownership place edge router of mobile node 20, second edge router 12 is the access edge router of mobile node 20.
Particularly, when mobile node 20 moved to the access subnet, at first the network prefix according to this access subnet of second edge router 12 broadcasting obtained an access network address (or being referred to as Care-of Address, COA, Care of Address); Perhaps distribute an access network address for it by the Dynamic Host Configuration Protocol server in this access subnet (not shown this Dynamic Host Configuration Protocol server among Fig. 1 for simplicity's sake).Mobile node 20 sends a binding update messages by second edge router 12 to first edge router 11 then, to notify first edge router 11 its access network addresss.
At this moment, the packet that mails to mobile node 20 from the IPv4 node still is routed to first edge router 11, after based on the temporary IP v4 address of mobile node 20 this packet being carried out protocol conversion process from IPv4 communication protocol to IPv6 communication protocol by first edge router 11, utilize IP tunneling, mail to second edge router 12 again behind IPv6 packet header of interpolation before the packet after protocol conversion.Destination address is the access address of mobile node in the IPv6 packet header of this interpolation, and source address is the IPv6 address of first edge router 11.Second edge router 12 is transmitted this bag and is given mobile node 20, after mobile node 20 receives this packet, after removing the IPv6 packet header that first edge router 11 adds, obtain packet after this protocol conversion, the routed path of packet is shown in the two-way thick arrow among Fig. 1.
When mobile node 20 sends packet to the IPv4 node, utilize IP tunneling, the data of sending are surrounded by two-layer IP packet header, and the source address in one deck IP packet header, the inside is the belonging area network address of mobile node 20, and destination address is the IPv6 address of IPv4 node correspondence; The source address in one deck IP packet header, outside is the access network address of mobile node 20, and destination address is the IPv6 address of ownership place edge router.At first this packet sends to second edge router 12, second edge router 12 sends to first edge router 11 with this packet, first edge router 11 is carried out protocol conversion process from IPv4 communication protocol to IPv6 communication protocol based on the temporary IP v4 address of mobile node 20 to this packet, and then the packet after the protocol conversion process mail to the IPv4 node, the routed path of packet is shown in the two-way thick arrow among Fig. 1.
Find out by above packet routed path, the mobile node of being had jurisdiction over for first edge router 11, no matter whether it current at the ownership place subnet, its all will be with the packet IPv4 node communication via first edge router 11, the routed path of packet is optimized inadequately; Break down when first edge router 11 in addition, in the time of can not working, cause the termination of communicating by letter of its mobile node that moves to the access subnet of having jurisdiction over and IPv4 node.
Summary of the invention
The present invention is in order to solve above-mentioned shortcoming of the prior art, proposed a kind ofly to be used for controlling a communication subnet (ownership place subnet) that belongs to first kind communication network and to move to the technical scheme that the mobile node of another communication subnet (access subnet) that belongs to first kind communication network is communicated by letter with the communication node of the second class communication network in the edge router that is connected to first kind communication network (as above-mentioned IPv6 communication network) and the second class communication network (as above-mentioned IPv4 communication network).At first, the edge router of access subnet obtains the mobile node second class network address corresponding with the second class communication network and right with the address of the corresponding first kind network address of first kind communication network; Then, based on this address to controlling described mobile node and described communication node communicates.Preferably, the edge router in the ownership place subnet of mobile node with the above-mentioned address of this mobile node to the edge router in the residing access subnet of notice mobile node.
According to a first aspect of the invention, provide a kind of in the edge router of communication network, be used for being controlled at based on the mobile node of the first kind communication network of first communication protocol with in the method that communicates based on the communication node in the second class communication network of second communication agreement, wherein, the subnet of the first kind communication network that this edge router is had jurisdiction over is the residing access subnetwork of described mobile node, it is characterized in that this method may further comprise the steps: I. obtains the second class network address corresponding with the described second class communication network and the first kind network address corresponding with described first kind communication network of described mobile node; II. based on the described second class network address and the described first kind network address of described mobile node, control described mobile node and described communication node communicates.
According to a second aspect of the invention, provide a kind of in the edge router of communication network, be used for assist control based on the mobile node of the first kind communication network of first communication protocol with in the method that communicates based on the communication node in the second class communication network of second communication agreement, wherein, the subnet of the first kind communication network that this edge router is had jurisdiction over is the ownership place subnet of described mobile node, described mobile node is in the access subnetwork of the first kind communication network that another edge router has jurisdiction over, it is characterized in that this method may further comprise the steps: ii. notifies described another edge router with the second class network address corresponding with the second class communication network of described mobile node and with the corresponding first kind network address of first kind communication network.
According to a third aspect of the invention we, provide a kind of in the edge router of communication network, be used for being controlled at based on the mobile node of the first kind communication network of first communication protocol with at the communication control unit that communicates based on the communication node in the second class communication network of second communication agreement, wherein, the subnet of the first kind communication network that this edge router is had jurisdiction over is the residing access subnetwork of described mobile node, it is characterized in that this communication control unit comprises first deriving means and control device.Wherein, first deriving means is used to obtain the second class network address corresponding with the described second class communication network and the first kind network address corresponding with described first kind communication network of described mobile node; Control device is used for based on the described second class network address of described mobile node and the described first kind network address, controls described mobile node and described communication node communicates.
According to a forth aspect of the invention, provide a kind of in the edge router of communication network, be used for assist control based on the mobile node of the first kind communication network of first communication protocol with at the sub controlling unit that communicates based on the communication node in the second class communication network of second communication agreement, wherein, the subnet of the first kind communication network that this edge router is had jurisdiction over is the ownership place subnet of described mobile node, described mobile node is in the access subnetwork of the first kind communication network that another edge router has jurisdiction over, wherein, this sub controlling unit comprises notifying device, and this notifying device is used for notifying described another edge router with the second class network address corresponding with the second class communication network of described mobile node and with the corresponding first kind network address of first kind communication network.
Preferably, described first kind communication network is the communication network based on IPv6 communication protocol, and the described second class communication network is the communication network based on IPv4 communication protocol.
The application of the invention provides is used for method that mobile node that control moves to the access subnet that belongs to first kind communication network communicates by letter with the communication node of Equations of The Second Kind communication network and device and is used for auxiliary method and the device that the mobile node that moves to the access subnet that belongs to first kind communication network is communicated by letter with the communication node of Equations of The Second Kind communication network of controlling in the edge router of the ownership place subnet of mobile node in the access subnet edge router of mobile node; Effectively optimize the routed path of information, and alleviated the load of the edge router in the ownership place subnet. And when the edge router in the angelica ground subnet broke down, the mobile node that moves to the access subnet can not ended with the communicating by letter of communication node in the second class communication network yet.Preferably, mobile node can also send the edge router of binding update messages to access, and then by the edge router of access notice ownership place edge device or other edge router, can make reduce widely the switching time of mobile node like this, accelerate mobile node switching process.Preferably, the present invention is by the network address of its second class communication network of managing of exchange between each edge router, the load between each edge router of equilibrium effectively.
Description of drawings
By reading the following detailed description of non-limiting example being done with reference to accompanying drawing, it is more obvious that other features, objects and advantages of the present invention will become.
Fig. 1 is the routed path schematic diagram of packet in the prior art;
Fig. 2 is the routed path schematic diagram according to the packet of a specific embodiment of the present invention;
Fig. 3 is the routed path schematic diagram according to the packet of another embodiment of the present invention;
Fig. 4 in the access edge router of communication network, be used for being controlled at according to a specific embodiment of the present invention based on the mobile node of the first kind communication network of first communication protocol with at the flow chart that communicates based on the communication node in the second class communication network of second communication agreement;
Fig. 5 is that the geographical router control of visit mobile node sends the flow chart of information to communication node among according to a preferred embodiment of the present invention the step S12 shown in Figure 4;
Fig. 6 is that access edge router control communication node sends information another flow chart to mobile node among according to a preferred embodiment of the present invention the step S12 shown in Figure 4;
Fig. 7 be among according to a preferred embodiment of the present invention the step S12 shown in Figure 4 in the access edge router control communication node send information another flow chart to mobile node;
Fig. 8 for according to a specific embodiment of the present invention the ownership place edge router of communication network be used to notify access edge router mobile node the second class network address corresponding with the second class communication network and with the flow chart of the corresponding first kind network address of first kind communication network;
Fig. 9 is for being used to control the flow chart of communication node transmission information to mobile node according to a specific embodiment of the present invention at the ownership place edge router of communication network;
Figure 10 is for being used for being controlled in the edge router of communication network according to a specific embodiment of the present invention based on the mobile node of the first kind communication network of first communication protocol and structured flowchart at the communication control unit that communicates based on the communication node in the second class communication network of second communication agreement;
Figure 11 is for being used for assist control based on the mobile node of the first kind communication network of first communication protocol and structured flowchart at the sub controlling unit that communicates based on the communication node in the second class communication network of second communication agreement in the edge router of communication network according to a specific embodiment of the present invention.
In the accompanying drawings, identical with similar Reference numeral is represented same or analogous device or method step.
Embodiment
Fig. 2 shows the packet routed path schematic diagram according to a specific embodiment of the present invention.Wherein, mobile node 20 belongs in the communication subnet of the first kind communication network that first edge router 11 had jurisdiction over, i.e. the ownership place subnet of mobile node 20; Mobile node 20 is currently located in another communication subnet of the first kind communication network that second edge router 12 had jurisdiction over, i.e. the access subnet of mobile node 20.
Here still being that example describes with the second class communication network (hereinafter to be referred as " IPv4 " territory) based on IPv4 communication protocol based on the first kind communication network (hereinafter to be referred as " IPv6 territory ") of IPv6 communication protocol.Wherein, the access subnet and the ownership place subnet of mobile node 20 all belong to the IPv6 territory, and the communication node in the second class communication network Access Network is the IPv4 node.
Concrete, when mobile node 20 moves to the access subnet in the IPv6 territory that second edge router 12 had jurisdiction over, at first need to obtain an access network address.Concrete, mobile node 20 can and obtain an access network address in conjunction with the part of its MAC Address according to the subnet information (for example this subnet address prefix) of this subnet of second edge router 12 broadcasting and (or be referred to as Care-of Address, COA, Care of Address), perhaps the Dynamic Host Configuration Protocol server in this subnet (not shown this Dynamic Host Configuration Protocol server among Fig. 2 for simplicity's sake) request obtains an access network address.
Subsequently, mobile node 20 sends a binding update messages by second edge router 12 to first edge router 11 (being the ownership place edge router), to notify first edge router 11 with the access network address of this mobile node 20.
First edge router 11 is after receiving this binding update messages, can mobile node 20 present located subnets (i.e. the IPv6 communication subnet of being had jurisdiction at second edge router 12) can be judged according to contained subnet address prefix in the current accessed zone network address of fringe node 20 correspondences in this binding update messages, temporary IP v4 address notification second edge router 12 of these mobile node 20 distribution will be then.Because mobile node 20 can identify by its access network address or belonging area network address, first edge router 11 can be with the access network address and temporary IP v4 address notification second edge router 12 of mobile node 20; Perhaps with the belonging area network address and IPv4 address notification second edge router 12 of mobile node 20.
Second edge router 12 the address of the temporary IP v4 address that obtains mobile node 20 and the access network address to or the address of temporary IP v4 address and belonging area network address to after, based on this address to controlling communicating by letter of mobile node 20 and IPv4 node.At this, need to prove, except aforementioned temporary IP v4 address and the access network address or temporary IP v4 address and belonging area network address by first edge router, 11 notice mobile nodes 20, second edge router 12 also can directly obtain its temporary IP v4 address and the access network address or temporary IP v4 address and belonging area network address by mobile node 20.
The IPv4 node of mobile node 20 in the IPv6 territory in the IPv4 territory sends in the situation of packet, after second edge router 12 receives and mails to the packet of IPv4 node from mobile node 20, can be based on the address of aforementioned acquisition to (being temporary IP v4 address and the access network address or the temporary IP v4 address and the belonging area network address of mobile node 20), this packet is carried out protocol conversion process from IPv4 communication protocol to IPv6 communication protocol; Subsequently, the packet after the protocol conversion is directly mail to the IPv4 territory.Then, this packet is routed to the IPv4 node in the IPv4 territory, and particularly, the routing procedure of packet in the IPv4 territory is the common practise that those skilled in the art should know, and the present invention repeats no more here.
Need to prove that the protocol conversion process from IPv4 (or IPv6) communication protocol to IPv6 (or IPv4) communication protocol is the same with protocol conversion process the prior art, mainly to IP packet header of packet conversion process that carries on an agreement.The IPv6 address of IPv4 node correspondence normally constitutes like this, (32 bit) preceding prefix that adds 96 bits constitutes corresponding IPv6 address (128 bit) in the IPv4 address, the prefix of this 96 bit is set by the network manager usually, has nothing in common with each other with the address prefix of each communication subnet in the IPv6 territory.So when second edge router 12 carried on an agreement conversion process at the packet that mobile node 20 is mail to the IPv4 node, the prefix of only removing preceding 96 bits in the destination address (being the IPv6 address of IPv4 node correspondence) of needs with this packet correspondence can obtain the IPv4 address of this IPv4 node.
The mobile node 20 of IPv4 node in the IPv4 territory in the IPv6 territory sends in the situation of packet, second edge router 12 can receive from other edge routers (for example, first edge router 11) transmit from being transmitted to mobile node 20 behind the packet of IPv4 node again; Or directly receive from the packet in IPv4 territory and be transmitted to mobile node 20.
Concrete, if second edge router 12 does not have the IPv4 address information of described mobile node 20 correspondences in being broadcast to the route advertisement message in IPv4 territory, then the IPv4 node packet that mails to mobile node 20 still is routed to first edge router 11.First edge router 11 can carry on an agreement after the conversion process to this packet, and then sends to second edge router 12, sends to mobile node 20 by the packet of second edge router 12 after with this protocol conversion process.Under this kind situation, the forward-path of this packet is same as the prior art.Perhaps first edge router 11 is receiving after the IPv4 node mails to the packet of mobile node 20, also can directly this packet be sent to second edge router 12, being carried on an agreement by 12 pairs of these packets of second edge router sends to mobile node 20 after the conversion process again.
And if second edge router 12 comprises the IPv4 address information of described mobile node 20 correspondences in being broadcast to the route advertisement message in IPv4 territory, promptly this route advertisement message is used to indicate this edge router can receive and transmit information from the second communication network to described mobile node 20, and when route advertisement message is established second edge router 12 for the edge router of the preferential packet that receives the temporary IP v4 address that is sent to this mobile node; Perhaps, the ownership place router of mobile node 20, promptly first edge router 11 is when knowing that this mobile node moves to other communication subnet, for example, when receiving the binding update messages from mobile node 20, the route advertisement message that first edge router 11 is broadcast to the IPv4 territory no longer comprises the temporary IP v4 address of this mobile node, then the IPv4 node packet that mails to mobile node directly is routed the access edge router to this mobile node, i.e. second edge router 12 from the IPv4 territory.Second edge router 12 is after receiving this packet, based on the IPv4 temporary address of these mobile node 20 correspondences, to the protocol conversion process of this packet execution from IPv4 communication protocol to IPv6 communication protocol; Then, the packet after the protocol conversion is sent to the IPv6 node.By packet forward-path shown in Figure 2 as can be seen, when mobile node 20 moves to the access subnet, can be via the access edge router, need not via the ownership place edge router with the IPv4 node communication, thereby alleviated the load of access edge router, and when the access edge router broke down, mobile node 20 can not ended with communicating by letter of IPv4 node yet.
More than from the angle of a mobile node, the technical scheme of the communication process that is used to control the mobile node that moves to the access subnet and IPv4 node in access edge router and the ownership place edge router is described.
For the situation that has a plurality of mobile nodes in the IPv6 network, preferably, each edge router can be notified the temporary IP v4 address set of himself other edge router, and with the address of the temporary IP v4 address of its mobile node of having jurisdiction over that moves to other IPv6 communication subnet and the access network address to or the address of temporary IP v4 address and belonging area network address to notifying other edge router.When the address in the temporary IP v4 address set in certain edge router changes or the access network address of the mobile node that moves to other IPv6 communication subnet that it is had jurisdiction over when changing, also need in time to notify other edge router, with the information unanimity of the access address that keeps temporary IP v4 address set in each edge router and each mobile node that moves to the access subnet.Preferably, other edge router is notified in the temporary IP v4 address of each mobile node that is in the ownership place subnet that each edge router can also be had jurisdiction over it and the address of belonging area network address to information, so that other edge router is receiving when mailing to the packet of this each mobile node from the IPv4 territory, can be based on the address of the temporary IP v4 address of each mobile node and belonging area network address to conversion process that this packet is carried on an agreement, and transmit accordingly.
Particularly, to notify the implementation of other edge router to have to information the address of temporary IP v4 address set information and mobile node multiple for each edge router.
A kind of implementation is that the mode with anycast group realizes, each edge router adds an anycast group, each edge router in the scope of anycast group, share temporary IP v4 address set information separately and each mobile node address of being had jurisdiction over to information; Each mobile node sends to some members in this anycast group with the access network address information of its renewal, in the scope of this anycast group, share the access network address information of each mobile node (about the specific implementation of anycast group by this member then, can be with reference to RFC1546 and RFC4786, the present invention repeats no more here).
Another kind of implementation is to set up a central server (can serve as this central server by certain edge router, perhaps also can be that an other network equipment is served as this central server), each edge router can with separately temporary IP v4 address set information with and the address of each mobile node of being had jurisdiction over information is sent to this central server, send to each edge router respectively by this central server then; Each mobile node sends to this central server with the access network address information of its renewal, sends to each edge router respectively by this central server then.
Also having a kind of implementation is to utilize the route head of IPv6 packet to realize the exchange of the address of each mobile node that temporary IP v4 address set information in each edge router and each edge router are had jurisdiction over to information.For example, in Fig. 3, when first edge router 11 has just started, can send an IPv6 packet that is used to notify its temporary IP v4 address set information of managing to the 3rd edge router 13, this packet of appointment must be via second edge router 12 in IPv6 packet header.(comprise and obtain the access network address for the first time when perhaps the access network address of the mobile node of being had jurisdiction over when first edge router 11 20 changes, perhaps the access network address becomes the another one address from an address), then send IPv6 packet to the three edge routers 13 that are used to notify the access address information after this mobile node 20 changes, and the specific data bag must be via second edge router 12 in the route head of this packet.
In addition, also can set up the exchange of access network address information that an IP multicast group realizes temporary IP v4 address in each edge router and moves to the mobile node of other IPv6 communication subnet.
In a word, the mode of exchange of access network address information that realizes temporary IP v4 address set between each edge router and move to the mobile node of other IPv6 communication subnet has a variety of, and the present invention does not enumerate here one by one.
Need to prove, though only show the network topology structure schematic diagram that the IPv6 territory comprises three communication subnets among Fig. 1 to Fig. 3, those skilled in the art will be understood that and the invention is not restricted to this that technical scheme of the present invention can be applied to the situation that network topology structure comprises a plurality of IPv6 communication subnets.Particularly, between the edge router in what IPv6 communication subnets the address of the temporary IP v4 address of exchange temporary IP v4 address set information and mobile node and the access network address to or the address of temporary IP v4 address and belonging area network address to information, can decide according to concrete network design situation.For example, a Virtual network operator has an edge router to connect this communication subnet, and is connected to the IPv4 backbone network at the communication subnet that the edge of IPv4 backbone network is provided with ten IPv6 territories in each communication subnet.Edge router is responsible for the protocol conversion process to the communication data packet of IPv4 node and IPv6 node, and supports the mobility of IPv6 node.Like this, the temporary IP v4 address information of exchange temporary IP v4 address set information and mobile node between these ten edge routers.
Since each edge router exchanged mutually temporary IP v4 address set information with and the address of each mobile node of being had jurisdiction over to information, each edge router not only comprises the temporary IP v4 address information (the perhaps temporary IP v4 address information that has been used of this edge router management) of this edge router management in the route advertisement message of IPv4 territory broadcasting, also can comprise the temporary IP v4 address set information (the temporary IP v4 address information that has been used that perhaps other edge router is managed) that other edge router is managed.The IPv4 node packet that mails to the IPv6 node will be routed in the nearest edge router of IPv4 node like this.Particularly, packet routed path as shown in Figure 3, because the 3rd edge router 13 is also known the temporary IP v4 address of mobile node 20, then in the route advertisement message of IPv4 territory broadcasting, also comprise the temporary IP v4 address information of mobile node 20 at the 3rd edge router 13.Suppose to compare other edge router, the 3rd edge router 13 is nearest from the IPv4 node, then the IPv4 node packet that mails to mobile node 20 can be routed to the 3rd edge router 13, and then sends to second edge router 12 after carrying out protocol conversion process from IPv4 communication protocol to IPv6 communication protocol by 13 pairs of these packets of the 3rd edge router.The packet of second edge router 12 after with this protocol conversion process sends to mobile node.Perhaps the 3rd edge router 13 directly sends to second edge router 12 with the packet that receives, by sending to mobile node 20 again after the 12 pairs of protocol conversions of these packets execution from IPv4 communication protocol to IPv6 communication protocol of second edge router.
Need to prove, only show the routed path that the IPv4 node mails to the packet of mobile node 20 among Fig. 3, the routed path that sends the packet of IPv4 node for mobile node 20 can be the reverse path of the routed path shown in Fig. 3, also can be routed path as shown in Figure 2, decide by concrete routing policy.
Since each edge router exchanged mutually temporary IP v4 address set information with and the address of each mobile node of being had jurisdiction over to information, make the mobile node 20 and the communication path of IPv4 node can have many.When the edge router in a certain paths wherein breaks down, can select other communication path to communicate.When the overload of certain edge router, can select via the communication path of other edge router carrying out communicating by letter of mobile node 20 and IPv4 node, thus the load of balanced each edge router.Further, if the communication subnet that first edge router 11 is had jurisdiction over has a reserve link that is connected to second edge router 12, then when first edge router 11 breaks down, even mobile node 20 is currently located in the subnet that first edge router 11 had jurisdiction over, also can use reserve link to communicate with the IPv4 node via second edge router 12.
Since each edge router exchanged mutually temporary IP v4 address set information with and the address of each mobile node of being had jurisdiction over to information, make the mobile node 20 might to shorten from the switching time that a communication subnet switches to (perhaps moving to) another communication subnet.Here the implication of switching time is meant: setting up from mobile node and new communication subnet that initial link (but still keep original with original path communicate by letter) to this mobile node begins in new communication subnet can be normally and till other IPv6 node or the IPv4 node communication with new path.Particularly, as shown in Figure 3, when Radix Angelicae Sinensis belongs to communication subnet that the mobile node 20 of the communication subnet that first edge router 11 had jurisdiction over had jurisdiction over from second edge router 12 and moves to the communication subnet that the 3rd edge router 13 had jurisdiction over, the binding update messages that mobile node 20 transmissions are used to notify its new access network address is to the 3rd edge router 13, and the 3rd edge router 13 is transmitted to this binding update messages second edge router 12 and first edge router 11 more then.When this binding update messages arrives second edge router 12, mobile node 20 can be set up in such a way with the new communication path of IPv4 node: suppose that first edge router 11 is from the nearest edge router of IPv4 node, then the IPv4 node packet that mails to mobile node 20 is routed directly to first edge router 11 from the IPv4 territory; Because binding update messages this moment no show still first edge router 11, then first edge router 11 still sends to this packet second edge router 12; Second edge router 12 based on the new access network address information of mobile node 20, sends to the 3rd edge router 13 with this packet, and then sends to mobile node 20 by the 3rd edge router 13 after receiving this packet.And, when binding update messages arrives first edge router 11, could set up the new communication path of mobile node 20 and IPv4 node according to prior art.Therefore, shortened the switching time of mobile node 20.
Fig. 4 show according to a specific embodiment of the present invention in the edge router of communication network, be used for being controlled at based on the mobile node of the first kind communication network of first communication protocol with at the flow chart that communicates based on the communication node in the second class communication network of second communication agreement.Wherein, the subnet of the first kind communication network that this edge router is had jurisdiction over is a mobile node present located access subnet, and promptly this edge router is the edge router in the access subnet of mobile node, i.e. access edge router.
Below be example with network topology structure shown in Figure 2, with reference to Fig. 4 to be used in the access edge router being controlled at based on the mobile node of the first kind communication network of first communication protocol with describe in the flow process that communicates based on the communication node in the second class communication network of second communication agreement.
At first, in step S11, second edge router 12 obtains the second class network address corresponding with the second class communication network of mobile node 20 and the first kind network address corresponding with first kind communication network.Here both can obtain the second class network address corresponding with the second class communication network of this mobile node and the first kind network address corresponding with first kind communication network from the edge router the ownership place subnet of mobile node, also can be to obtain the second class network address of its second class communication network correspondence and the first kind network address corresponding with first kind communication network from this mobile node.The first kind network address comprises that this mobile node is in the belonging area network address that home subnet obtains and/or the access network address that obtains at the access subnet.
Then, in step S12, second edge router 12 is based on the second class network address and the first kind network address of mobile node 20, and control mobile node 20 communicates with communication node.
Particularly, communicating by letter between mobile node 20 and the communication node comprises two kinds of situations: situation one. mobile node 20 transmission information are to communication node; Situation two. communication node sends information to mobile node 20.
To be elaborated to these two kinds of situations below:
Situation one. mobile node 20 transmission information are to communication node
Fig. 5 shows among according to a preferred embodiment of the present invention the step S12 shown in Figure 4 second edge router, 12 control mobile nodes, 20 transmission information to the flow chart of communication node.
At first, in step S1211, the first information that mails to communication node that second edge router 12 receives from mobile node 20.
Then, in step S1212, second edge router 12 is based on the second class network address and the first kind network address of mobile node, to first protocol conversion process of first information execution from first communication protocol to the second communication agreement, to obtain the first information through first protocol conversion.
At last, in step S1213, second edge router 12 will mail to communication node through the first information of first protocol conversion.
Below be example with communication network shown in Figure 2, with reference to Fig. 5 edge router is described the process that the first information from mobile node in the first kind communication network carries out first protocol conversion process.Still being example based on the first kind communication network of IPv6 communication protocol and based on the second class communication network of IPv4 communication protocol, the communication node in this moment second class communication network is the IPv4 node, and the first information is the IP packet.
At first, those skilled in the art should understand, mobile node 20 can utilize its in the ownership place subnet of IPv6 territory the communication node (being the IPv4 node) in the belonging area network address that obtains and the IPv4 territory communicate, also can utilize its access subnet to obtain the access network address and IPv4 node communication in the IPv6 territory, perhaps utilize the belonging area network address and the access network address and IPv4 node to communicate simultaneously, promptly source address both can be the belonging area network address of mobile node 20 in the IPv6 packet that sends out of mobile node 20; It also can be the reference address network address of mobile node 20; Perhaps utilize IP tunneling of the prior art, promptly these IPv6 data are surrounded by two-layer IP packet header, the source address in one deck IP packet header, the inside is the belonging area network address of mobile node 20, destination address is the IPv6 address of IPv4 node correspondence, the source address in one deck IP packet header, outside is the access network address of mobile node 20, and destination address is the IP network address of second edge router 12.
Second edge router 12 is receiving after mobile node 20 mails to the packet of IPv4 node, utilize the temporary IP v4 address of these mobile node 20 correspondences that obtain, to the protocol conversion process of this packet execution from IPv6 communication protocol to IPv4 communication protocol, with the destination address in the packet, the IPv6 address transition that is IPv4 node correspondence is IPv4 address (promptly removes the prefix of 96 bits of this IPv6 address, then obtain the IPv4 address of this IPv4 node); And, source address is converted to the temporary IP v4 address of mobile node based on the temporary IP v4 address information that obtains mobile node, and the other parts of packet are carried out the corresponding protocol conversion process, same here prior art, the present invention repeats no more.
If this packet utilizes IP tunneling to transmit, then it has two-layer IP packet header, second edge router 12 needs one deck IP packet header, outside is removed, then the source address and the destination address in one deck IP packet header, the inside are carried out above-mentioned conversion process, and the other parts of packet are carried out the corresponding protocol conversion process.
Situation two. the communication node in the second class communication network sends information to first kind communication Mobile node in the network
Second edge router 12 will be transmitted to mobile node 20 from second information that mails to mobile node 20 of communication node.According to the different of the routed path of second information and whether by second edge router 12 conversion process that carries on an agreement, can be divided into following several situation particularly:
I. second edge router 12 receives from communication node via other edge router Second information, and to being transmitted to mobile node 20 after this second information and executing protocol conversion process
Fig. 6 shows and be used to control the flow chart of communication node transmission information to mobile node 20 according to a preferred embodiment of the present invention in second edge router 12 in step S12 shown in Figure 4.
At first, in step S1221, second edge router 12 receives second information that comes from communication node via other edge router transmission.
Then, in step S1222, second edge router 12 is based on the second class network address and the first kind network address of mobile node, to second protocol conversion process of second information and executing from the second communication agreement to first communication protocol, to obtain second information through second protocol conversion.
At last, in step S1223, second edge router 12 will be transmitted to mobile node 20 through second information of second protocol conversion.
II. second edge router 12 receives from communication node via other edge router And undertaken after the protocol conversion by any edge router in other edge router Two information, and second information after this protocol conversion is transmitted to mobile node 20
At first, second edge router 12 receives second information that mails to mobile node 20 from the communication node in the second class communication network via other edge router transmission; Then, second information after the protocol conversion is sent to mobile node 20.
If the edge router in the ownership place subnet of mobile node 20 only in other edge router, it is the second class network address that first edge router 11 shown in Fig. 2 is known these mobile node 20 correspondences, then this second information is routed to first edge router 11, then by the protocol conversion process of 11 pairs of these second information and executing of first edge router from the second class communication protocol to first kind communication protocol, and second information after the protocol conversion sent to second edge router 12, be transmitted to mobile node 20 again by second edge router 12.
If other edge router has all been known the second class network address of mobile node 20, and all to second class communication network broadcasting route advertisement message, this route advertisement message is used for indicating respectively each edge router can receive and transmit information from the second communication network to mobile node 20, then second information might be routed any in other edge router, carry out with above-mentioned ownership place edge router identical operations by this any edge router then, promptly to the protocol conversion process of this second information and executing from the second class communication protocol to first kind communication protocol, and second information after the protocol conversion sent to second edge router 12, be transmitted to mobile node 20 again by second edge router 12.
III. second edge router 12 is directly received from communication section by the second class communication network Second information of point is to being transmitted to mobile node 20 after this second information and executing protocol conversion
At first, this situation based on prerequisite be that second edge router 12 is known the second class network address of mobile node 20, and to second class communication network broadcasting route advertisement message.Route advertisement message is used to indicate second edge router 12 can receive and transmit information from the second communication network to mobile node 20, and in route advertisement message second edge router 12 is made as the edge router that preferential reception is sent to the second class network address of these mobile node 20 correspondences; Perhaps, first edge router 11 is when knowing that this mobile node 20 moves to other communication subnet, the route advertisement message that is broadcast to the second class communication network no longer comprises the second class network address information of these mobile node 20 correspondences, and except that first edge router 11, other edge router does not comprise the information of the second class network address of these mobile node 20 correspondences yet in the route advertisement message that is broadcast to the second class communication network, then communication node second information that mails to mobile node 20 then is routed directly to second edge router 12 of this mobile node from the second class communication network.
Fig. 7 shows and be used to control communication node transmission information another flow chart to mobile node 20 under this situation in second edge router 12 in step S12 shown in Figure 4.
At first, in step S1221 ', second edge router 12 directly receives second information that comes from communication node via the second class communication network.
Then, in step S1222 ', second edge router 12 is based on the second class network address and the first kind network address of mobile node, second information carried out second protocol conversion process from the second communication agreement to first communication protocol, to obtain second information through second protocol conversion.
At last, in step S1223 ', second edge router 12 will be transmitted to mobile node 20 through second information of second protocol conversion.
Step S1222 ' and step S1223 ' are with step S1222 shown in Fig. 6 and step S1223.
More than this mobile node 20 of control process of communicating by letter with communication node in the access edge router of mobile node 20 is had been described in detail, the process that assist control mobile node 20 in the ownership place edge router of mobile node 20 is communicated by letter with communication node describes below.
Be example with network topology structure shown in Figure 2 still, mobile node 20 belongs in the communication subnet of the first kind communication network that first edge router 11 had jurisdiction over, i.e. the ownership place subnet of mobile node 20; Mobile node 20 is currently located in another communication subnet of the first kind communication network that second edge router 12 had jurisdiction over, i.e. the access subnet of mobile node 20.Describe with the process that Fig. 9 communicates by letter with communication node to assist control mobile node 20 in first edge router 11 below in conjunction with Fig. 2 and with reference to Fig. 8.
Because mobile node 20 moves in the access subnet of the first kind communication network that second edge router 12 had jurisdiction over, therefore, first edge router 11 need be notified second edge router 12 with the second class network address corresponding with the second class communication network of mobile node 20 and with the corresponding first kind network address of first kind communication network.The first kind network address comprises that this mobile node 20 is in the belonging area network address that home subnet obtains and/or the access network address that obtains at the access subnet.
When the first kind network address comprised the access network address of mobile node 20, first edge router 11 also needed to obtain the access network address of mobile node 20 when notifying second edge router 12.When the first kind network address being shown among Fig. 8 comprising the access network address of mobile node 20, first edge router 11 is notified the flow chart of second edge router 12 with the second class network address corresponding with the second class communication network of mobile node 20 and with the corresponding first kind network address of first kind communication network.
At first, in step S211, first edge router 11 obtains mobile node 20 in the access network address that the access subnet is obtained.
Then, in step S212, first edge router 11 is notified second edge router 12 with the network address and the access network address of the second class communication network of mobile node 20 correspondences.
Preferably, when mobile node 20 moves to the access subnet, first edge router 11 also can be broadcasted route advertisement message to the second class communication network, and this route advertisement message is used to notify first edge router 11 can receive and transmit information from the second class communication network to mobile node 20.
When from second information communication node, that mail to mobile node 20, when being routed to first edge router 11, the flow chart that first edge router 11 is carried out as shown in Figure 9.
At first, in step S221, first edge router 11 receives second information that comes from communication node;
Then, in step S222, first edge router 11 is forwarded to second edge router, 12, the second edge routers 12 with second information and again this second information is forwarded to mobile node 20.
Particularly, if second protocol conversion process of this second information from the second communication agreement to first communication protocol carried out by second edge router 12, then first edge router 11 directly is forwarded to second information second edge router 12 in step S222.If second protocol conversion process of this second information from the second communication agreement to first communication protocol carried out by first edge router 11, then first edge router 11 is based on the second class network address and the first kind network address of mobile node 20, second information is carried out second protocol conversion process from the second communication agreement to first communication protocol, to obtain second information through second protocol conversion; To be transmitted to second edge router 12 through second information of second protocol conversion then.
Figure 10 shows according to a specific embodiment of the present invention and is used for being controlled in the edge router of communication network based on the mobile node of the first kind communication network of first communication protocol and structured flowchart at the communication control unit that communicates based on the communication node in the second class communication network of second communication agreement, wherein, the subnet of the first kind communication network had jurisdiction over of this edge router is a mobile node present located access subnet.This communication control unit 100 comprises first deriving means 101, control device 102 and first broadcaster 103.Wherein control device 102 specifically comprises first receiving device 1021, first conversion equipment 1022, first dispensing device 1023 and first retransmission unit 1024 again.Wherein, first retransmission unit 1024 specifically comprises second receiving system 10241, second conversion equipment 10242 and second dispensing device 10243 again.Here for brevity, figure 11 illustrates the optional sub-device in many preferred embodiments, those skilled in the art are according to the application's instruction, will be understood that wherein only first deriving means 101 and control device 102 are to implement the necessary device of the present invention, other sub-devices are option means.
Here be example with network topology structure shown in Figure 2 still, mobile node 20 belongs in the communication subnet of the first kind communication network that first edge router 11 had jurisdiction over, i.e. the ownership place subnet of mobile node 20; Mobile node 20 is currently located in another communication subnet of the first kind communication network that second edge router 12 had jurisdiction over, i.e. the access subnet of mobile node 20.At this moment, communication control unit 100 is arranged in second edge router 12, describes below in conjunction with the Fig. 2 and the process of the communication control unit in second edge router 12 100 control mobile nodes 20 being communicated by letter with communication node with reference to Figure 10.
At first, first deriving means 101 obtains the second class network address corresponding with the second class communication network of mobile node 20 and the first kind network address corresponding with first kind communication network.Here both can be from the edge router the ownership place subnet of mobile node 20, being that edge router 11 obtains the second class network address corresponding with the second class communication network of this mobile node and the first kind network address corresponding with first kind communication network, also can be to obtain the second class network address of its second class communication network correspondence and the first kind network address corresponding with first kind communication network from this mobile node 20.The first kind network address comprises that this mobile node is in the belonging area network address that home subnet obtains and/or the access network address that obtains at the access subnet.
Then, control device 102 is based on the second class network address and the first kind network address of mobile node 20, and control mobile node 20 communicates with communication node.
Particularly, mobile node 20 process of communicating by letter with communication node comprises two kinds of situations: situation one. mobile node sends information to communication node 20; Situation two. communication node sends information to mobile node 20.
To be elaborated to these two kinds of situations below:
Situation one. mobile node 20 transmission information are to communication node
At first, first receiving device 1021 receptions are from the first information that mails to communication node of mobile node 20.
Then, first conversion equipment 1022 is based on the second class network address and the first kind network address of mobile node 20, to first protocol conversion process of first information execution, to obtain the first information through first protocol conversion from first communication protocol to the second communication agreement.
At last, first dispensing device 1023 will mail to communication node through the first information of first protocol conversion.
Situation two. communication node sends information to mobile node 20
First retransmission unit 1024 will be transmitted to mobile node 20 from second information that mails to mobile node 20 of communication node.According to the different of the routed path of second information and whether by the access edge router conversion process that carries on an agreement, can be divided into following several situation particularly:
I. communication control unit 100 receives from communication node via other edge router Second information, and to being transmitted to mobile node 20 after this second information and executing protocol conversion process
At first, second receiving system 10241 receives second information that comes from communication node via other edge router transmission.
Then, second conversion equipment 10242 is based on the second class network address and the first kind network address of mobile node 20, to second protocol conversion process of second information and executing, to obtain second information through second protocol conversion from the second communication agreement to first communication protocol.
At last, second dispensing device 10243 will be transmitted to mobile node 20 through second information of second protocol conversion.
II. communication control unit 100 receives from communication node via other edge router And undertaken after the protocol conversion by any edge router in other edge router Two information, and second information after this protocol conversion is transmitted to mobile node 20
At first, second receiving system 10241 receives second information that mails to mobile node 20 from the communication node in the second class communication network via other edge router transmission; Then, second dispensing device 10243 is sent to mobile node 20 with second information after the protocol conversion.
If the edge router in the ownership place subnet of mobile node 20 only in other edge router, it is the second class network address that first edge router 11 shown in Fig. 2 is known this mobile node correspondence, then this second information is routed to first edge router 11, send to communication control unit 100 then by the protocol conversion process of 11 pairs of these second information and executing of first edge router, and with second information after the protocol conversion from the second class communication protocol to first kind communication protocol.Second receiving system 10241 receives second information after this protocol conversion, and sends to mobile node by second dispensing device 10243.
If other edge router has all been known the second class network address of mobile node, and all to second class communication network broadcasting route advertisement message, route advertisement message is used for indicating respectively each edge router can receive and transmit information from the second communication network to mobile node, then second information might be routed any in other edge router, carry out with above-mentioned ownership place edge router identical operations by this any edge router then, send to the access edge router promptly to the protocol conversion process of this second information and executing, and with second information after the protocol conversion from the second class communication protocol to first kind communication protocol.Second receiving system 10241 receives second information after this protocol conversion, and sends to mobile node by second dispensing device 10243.
III. communication control unit 100 directly receives from communication section from the second class communication network Second information of point is to being transmitted to mobile node 20 after this second information and executing protocol conversion
At first, this situation based on prerequisite be, first deriving means 101 is known the second class network address of mobile node, and by first broadcaster 103 to second class communication network broadcasting route advertisement message.Route advertisement message is used to indicate second edge router 12 can receive and transmit information from the second communication network to mobile node, and establishes second edge router 12 in route advertisement message and be the preferential edge router that receives the second class network address that is sent to this mobile node correspondence; Perhaps, first edge router 11 is when knowing that this mobile node 20 moves to other communication subnet, the route advertisement message that is broadcast to the second class communication network no longer comprises the second class network address information of these mobile node 20 correspondences, and except that first edge router 11, other edge router does not comprise the information of the second class network address of these mobile node 20 correspondences yet in the route advertisement message that is broadcast to the second class communication network, then communication node second information that mails to mobile node 20 then is routed directly to the access edge router of this mobile node 20 from the second class communication network.
At first, second receiving system 10241 receives second information that comes from communication node.
Then, second conversion equipment 10242 is based on the second class network address and the first kind network address of mobile node 20, second information is carried out second protocol conversion process from the second communication agreement to first communication protocol, to obtain second information through second protocol conversion.
At last, second dispensing device 10243 will be transmitted to mobile node 20 through second information of second protocol conversion.
More than process that these mobile nodes of communication control unit 100 control are communicated by letter with communication node have been described in detail, the process that sub controlling unit 200 assist control mobile nodes are communicated by letter with communication node describes below.
Figure 11 shows according to a specific embodiment of the present invention and is used for assist control based on the mobile node of the first kind communication network of first communication protocol and structured flowchart at the sub controlling unit that communicates based on the communication node in the second class communication network of second communication agreement in the edge router of communication network.This sub controlling unit 200 comprises second deriving means 201, notifying device 205, second broadcaster 203, the 3rd receiving system 204 and second retransmission unit 205.Wherein, second retransmission unit 205 specifically comprises the 3rd conversion equipment 2052 and the 3rd dispensing device 2051 again.Here for brevity, figure 12 illustrates the optional sub-device in many preferred embodiments, those skilled in the art will be understood that wherein that according to the application's instruction only notifying device 202 is to implement the necessary device of the present invention, and other sub-devices are option means.
Be example with network topology structure shown in Figure 2 still, mobile node 20 belongs in the communication subnet of the first kind communication network that first edge router 11 had jurisdiction over, i.e. the ownership place subnet of mobile node 20; Mobile node 20 is currently located in another communication subnet of the first kind communication network that second edge router 12 had jurisdiction over, i.e. the access subnet of mobile node 20.This moment, sub controlling unit 200 was arranged in first edge router 11, described below in conjunction with the Fig. 2 and the process of sub controlling unit 200 assist control mobile nodes 20 in first edge router 11 being communicated by letter with communication node with reference to Figure 12.
Because mobile node 20 moves in the access subnet of the first kind communication network that second edge router 12 had jurisdiction over, therefore, notifying device 202 need be notified second edge router 12 with the second class network address corresponding with the second class communication network of mobile node 20 and with the corresponding first kind network address of first kind communication network.The first kind network address comprises that this mobile node 20 is in the belonging area network address that the ownership place subnet obtains and/or the access network address that obtains at the access subnet.
When the first kind network address comprises the access network address of mobile node 20, the access network address that before notifying device 202 notice access edge routers, also need obtain mobile node 20 by second deriving means 201.At first, second deriving means 201 obtains mobile node 20 in the access network address that the access subnet is obtained.Then, notifying device 202 is notified second edge router 12 with the network address and the access network address of the second class communication network of mobile node 20 correspondences.
Preferably, when mobile node 20 moves to the access subnet, second broadcaster 203 also can be broadcasted route advertisement message to the second class communication network, and this route advertisement message is used to notify first edge router 11 can receive and transmit information from the second class communication network to mobile node 20.
When from second information communication node, that mail to mobile node 20, when being routed to first edge router 11, at first, receive second information that comes from communication node by the 3rd receiving system 204; Then, second retransmission unit 205 is forwarded to the second edge router one, 2, the second edge routers 12 with second information and again this second information is forwarded to mobile node 20.
Particularly, if second protocol conversion process of this second information from the second communication agreement to first communication protocol carried out by second edge router 20, then second retransmission unit 205 directly is forwarded to second information second edge router 20.If second protocol conversion process of this second information from the second communication agreement to first communication protocol carried out by first edge router 11, then the 3rd conversion equipment 2052 is based on the second class network address and the first kind network address of mobile node 20, second information is carried out second protocol conversion process from the second communication agreement to first communication protocol, to obtain second information through second protocol conversion; The 3rd dispensing device 2051 will be transmitted to second edge router 12 through second information of second protocol conversion then.
Need to prove, above from communication control unit 100 be arranged in the access edge router of mobile node, the angle of ownership place edge router that sub controlling unit 200 is arranged in this mobile node is described enforcement of the present invention.Because have a plurality of mobile nodes in the communication subnet that each edge router is had jurisdiction over, this edge router is the ownership place edge router of a mobile node, be again the access edge router of another mobile node simultaneously.Therefore, when including communication control unit 100 with sub controlling unit 200 in the edge router simultaneously, the device of carrying out identical function can merge.For example, second conversion equipment 10242 and the 3rd conversion equipment 2052 can be same conversion equipments; Second dispensing device 10241 and the 3rd dispensing device 2051 can be same dispensing devices.
Though among the present invention with IPv4 communication protocol and IPv6 communication protocol to being that example has been described in detail the present invention, those skilled in the art is according to the instruction of present specification, will be understood that and the invention is not restricted to IPv4 communication protocol and IPv6 communication protocol is right, communication protocol for other is right, and the present invention is suitable equally.The type of the mobile node among the present invention is not limit, and comprises mobile network appliances such as portable terminal that all can communicate with the IPv4 node or Mobile Server.Technical scheme of the present invention all can realize with software or hardware.
More than specific embodiments of the invention are described.It will be appreciated that the present invention is not limited to above-mentioned specific implementations, those skilled in the art can make various distortion or modification within the scope of the appended claims.

Claims (26)

  1. One kind in the edge router of communication network, be used for being controlled at based on the mobile node of the first kind communication network of first communication protocol with in the method that communicates based on the communication node in the second class communication network of second communication agreement, wherein, the subnet of the first kind communication network that this edge router is had jurisdiction over is the residing access subnet of described mobile node, it is characterized in that this method may further comprise the steps:
    I. obtain the second class network address corresponding and the first kind network address corresponding of described mobile node with described first kind communication network with the described second class communication network;
    II. based on the described second class network address and the described first kind network address of described mobile node, control described mobile node and described communication node communicates.
  2. 2. method according to claim 1 is characterized in that, described Step II may further comprise the steps:
    -reception is from the first information that mails to described communication node of described mobile node;
    -based on the described second class network address and the described first kind network address of described mobile node, the described first information is carried out first protocol conversion process from first communication protocol to the second communication agreement, to obtain the first information through first protocol conversion;
    -the described first information through first protocol conversion is mail to described communication node.
  3. 3. method according to claim 1 and 2, wherein, described Step II is further comprising the steps of:
    -will be transmitted to described mobile node from second information that mails to described mobile node of described communication node.
  4. 4. method according to claim 3 is characterized in that, the described step that second information is transmitted to described mobile node may further comprise the steps:
    -reception is via second information that comes from described communication node of other edge router transmission;
    -based on the described second class network address and the described first kind network address of described mobile node, to second protocol conversion process of described second information and executing, to obtain second information through second protocol conversion from the second communication agreement to first communication protocol;
    -described second information through second protocol conversion is transmitted to described mobile node.
  5. 5. method according to claim 3, wherein, described that second information is transmitted to the step of described mobile node is further comprising the steps of:
    -receive via other edge router transmission from the communication node in the described second class communication network mail to described mobile node and carry out second information after second protocol conversion by any edge router in described other edge router;
    -second information after described second protocol conversion is sent to described mobile node.
  6. 6. method according to claim 3, wherein, further comprising the steps of after described step I:
    -route advertisement message to be broadcasted to the second communication network, this route advertisement message is used to indicate this edge router can receive and transmit information from the second communication network to described mobile node;
    It is wherein, described that second information is transmitted to the step of described mobile node is further comprising the steps of:
    -reception comes from second information of described communication node;
    -based on the described second class network address and the described first kind network address of described mobile node, described second information is carried out second protocol conversion process from the second communication agreement to first communication protocol, to obtain second information through second protocol conversion;
    -described second information through second protocol conversion is transmitted to described mobile node.
  7. 7. method according to claim 1 and 2 is characterized in that, described first communication protocol comprises the IPv6 agreement, and the second communication agreement comprises the IPv4 agreement.
  8. One kind in the edge router of communication network, be used for assist control based on the mobile node of the first kind communication network of first communication protocol with in the method that communicates based on the communication node in the second class communication network of second communication agreement, wherein, the subnet of the first kind communication network that this edge router is had jurisdiction over is the ownership place subnet of described mobile node, described mobile node is in the access subnet of the first kind communication network that another edge router has jurisdiction over, it is characterized in that this method may further comprise the steps:
    Ii. notify described another edge router with the second class network address corresponding of described mobile node and with the corresponding first kind network address of first kind communication network with the second class communication network.
  9. 9. method according to claim 8, wherein, the first kind network address of described mobile node comprises that described mobile node is in the belonging area network address that described home subnet obtains and/or the access network address that obtains at described access subnet.
  10. 10. method according to claim 9 is characterized in that, the described first kind network address comprises the described access network address, and is wherein, further comprising the steps of before described step I i:
    I. obtain described mobile node in the access network address that described access subnet is obtained;
    Described step I i is further comprising the steps of:
    -notify described another edge router with the network address and the described access network address of the second class communication network of described mobile node correspondence.
  11. 11. each described method in 10 is characterized in that according to Claim 8, and is further comprising the steps of:
    B. when described mobile node moves to described access subnet, route advertisement message is broadcasted to the second class communication network, and this route advertisement message is used to notify this edge router can receive and transmit information from the second class communication network to described mobile node;
    Wherein, further comprising the steps of:
    -reception comes from second information of described communication node;
    -described second information is forwarded to described another edge router.
  12. 12. method according to claim 11 is characterized in that, the described step that described second information is forwarded to described another edge router comprises:
    If second protocol conversion process of-described second information from the second communication agreement to first communication protocol is that the described edge router of the ownership place subnet of described mobile node is carried out by the subnet of its first kind communication network of having jurisdiction over, then based on the described second class network address and the described first kind network address of described mobile node, described second information is carried out second protocol conversion process from the second communication agreement to first communication protocol, to obtain second information through second protocol conversion;
    -described second information through second protocol conversion is transmitted to described another edge router.
  13. 13. each described method in 12 according to Claim 8, wherein, described first communication protocol comprises the IPv6 agreement, and the second communication agreement comprises the IPv4 agreement.
  14. 14. one kind in the edge router of communication network, be used for being controlled at based on the mobile node of the first kind communication network of first communication protocol with at the communication control unit that communicates based on the communication node in the second class communication network of second communication agreement, wherein, the subnet of the first kind communication network that this edge router is had jurisdiction over is the residing access subnet of described mobile node, it is characterized in that this communication control unit comprises:
    First deriving means, the second class network address corresponding and the first kind network address corresponding that are used to obtain described mobile node with described first kind communication network with the described second class communication network;
    Control device is used for the described second class network address and the described first kind network address based on described mobile node, controls described mobile node and described communication node communicates.
  15. 15. communication control unit according to claim 14 is characterized in that, described control device also comprises:
    First receiving device is used to receive the first information that mails to described communication node from described mobile node;
    First conversion equipment, be used for the described second class network address and the described first kind network address based on described mobile node, to first protocol conversion process of described first information execution, to obtain the first information through first protocol conversion from first communication protocol to the second communication agreement;
    First dispensing device is used for the described first information through first protocol conversion is mail to described communication node.
  16. 16. communication control unit according to claim 14, wherein, described control device also comprises:
    First retransmission unit is used for second information that mails to described mobile node from described communication node is transmitted to described mobile node.
  17. 17. communication control unit according to claim 16 is characterized in that, described first retransmission unit also comprises:
    Second receiving system is used to receive second information that comes from described communication node via other edge router transmission;
    Second conversion equipment, be used for the described second class network address and the described first kind network address based on described mobile node, to second protocol conversion process of described second information and executing, to obtain second information through second protocol conversion from the second communication agreement to first communication protocol;
    Second dispensing device is used for described second information through second protocol conversion is transmitted to described mobile node.
  18. 18. communication control unit according to claim 17, wherein, described second receiving system also is used for:
    -receive via other edge router transmission from the communication node in the described second class communication network mail to described mobile node and carry out second information after second protocol conversion by any edge router in described other edge router;
    Described second dispensing device also is used for:
    -second information after described second protocol conversion is sent to described mobile node.
  19. 19. communication control unit according to claim 17 wherein, also comprises:
    First broadcaster is used for route advertisement message is broadcasted to the second communication network, and this route advertisement message is used to indicate this edge router can receive and transmit information from the second communication network to described mobile node;
    Wherein, described second receiving system also is used for:
    -reception comes from second information of described communication node;
    Second conversion equipment also is used for:
    -based on the described second class network address and the described first kind network address of described mobile node, described second information is carried out second protocol conversion process from the second communication agreement to first communication protocol, to obtain second information through second protocol conversion;
    Second dispensing device also is used for:
    -described second information through second protocol conversion is transmitted to described mobile node.
  20. 20. according to each described communication control unit in the claim 14 to 19, wherein, described first communication protocol comprises the IPv6 agreement, the second communication agreement comprises the IPv4 agreement.
  21. 21. one kind in the edge router of communication network, be used for assist control based on the mobile node of the first kind communication network of first communication protocol with at the sub controlling unit that communicates based on the communication node in the second class communication network of second communication agreement, wherein, the subnet of the first kind communication network that this edge router is had jurisdiction over is the ownership place subnet of described mobile node, described mobile node is in the access subnet of the first kind communication network that another edge router has jurisdiction over, wherein, this sub controlling unit comprises:
    Notifying device is used for notifying described another edge router with the second class network address corresponding with the second class communication network of described mobile node and with the corresponding first kind network address of first kind communication network.
  22. 22. sub controlling unit according to claim 21, wherein, the first kind network address of described mobile node comprises that described mobile node is in the belonging area network address that described home subnet obtains and/or the access network address that obtains at described access subnet.
  23. 23. sub controlling unit according to claim 22 is characterized in that, the described first kind network address comprises the described access network address, wherein, also comprises:
    Second deriving means is used to obtain described mobile node in the access network address that described access subnet is obtained;
    Described notifying device also is used for:
    -notify described another edge router with the network address and the described access network address of the second class communication network of described mobile node correspondence.
  24. 24. according to each described sub controlling unit in the claim 21 to 23, it is characterized in that, also comprise:
    Second broadcaster is used for route advertisement message is broadcasted to the second class communication network, and this route advertisement message is used to notify this edge router can receive and transmit information from the second class communication network to described mobile node;
    Wherein, also comprise:
    The 3rd receiving system is used to receive second information that comes from described communication node;
    Second retransmission unit is forwarded to described another edge router with described second information.
  25. 25. sub controlling unit according to claim 24 is characterized in that, described second retransmission unit comprises:
    The 3rd conversion equipment, if being used for second protocol conversion process of described second information from the second communication agreement to first communication protocol is that the described edge router of the ownership place subnet of described mobile node is carried out by the subnet of its first kind communication network of having jurisdiction over, then based on the described second class network address and the described first kind network address of described mobile node, described second information is carried out second protocol conversion process from the second communication agreement to first communication protocol, to obtain second information through second protocol conversion;
    The 3rd dispensing device is used for described second information through second protocol conversion is transmitted to described another edge router.
  26. 26. according to each described sub controlling unit in the claim 21 to 25, wherein, described first communication protocol comprises the IPv6 agreement, the second communication agreement comprises the IPv4 agreement.
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