WO2009026783A1 - Procédé et équipement pour commander un nœud mobile dans un réseau de communication communiquant avec un réseau hétérogène - Google Patents

Procédé et équipement pour commander un nœud mobile dans un réseau de communication communiquant avec un réseau hétérogène Download PDF

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Publication number
WO2009026783A1
WO2009026783A1 PCT/CN2008/001457 CN2008001457W WO2009026783A1 WO 2009026783 A1 WO2009026783 A1 WO 2009026783A1 CN 2008001457 W CN2008001457 W CN 2008001457W WO 2009026783 A1 WO2009026783 A1 WO 2009026783A1
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WIPO (PCT)
Prior art keywords
communication
mobile node
type
protocol
information
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PCT/CN2008/001457
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English (en)
Chinese (zh)
Inventor
Chunyan Yao
Haibo Wen
Jun Zheng
Fanxiang Bin
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Alcatel Lucent
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Publication of WO2009026783A1 publication Critical patent/WO2009026783A1/fr

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Classifications

    • 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

Definitions

  • the present invention relates to edge routers in communication networks, and more particularly to methods and apparatus for controlling communication between mobile nodes and communication nodes in heterogeneous networks in edge routers of communication networks. Background technique
  • the existing Internet is mainly based on the IPv4 protocol.
  • IPv4 protocol As the number of Internet users continues to increase and the requirements for Internet applications continue to increase, network deployment based on the IPv6 protocol is gradually being developed, and more and more users hope to adopt various
  • the terminal is connected to the Internet through a wireless network at any location to implement mobile services.
  • the IPv6 protocol supports mobile IP technology.
  • IPv6 nodes pass the IPv6/IPv4 network address and protocol converter (NAT-PT,
  • IPv6 communication network supports the mobility of IPv6 nodes, that is, the IPv6 nodes are mobile nodes
  • Home Agents are also deployed in the IPv6 domain to support the mobility of IPv6 nodes.
  • IPv4 domain the functions of the IPv6/IPv4 network address and protocol converter and the home agent are usually connected to the IPv4 communication network (hereinafter referred to as "IPv4 domain,") and the IPv6 communication network (hereinafter referred to as "IPv6 domain”).
  • IPv4 domain IPv4 communication network
  • IPv6 domain IPv6 domain
  • the edge router is implemented.
  • Figure 1 shows a schematic diagram of a network topology in the prior art.
  • the first edge router 11, the second edge router 12 and the third edge router 13 are respectively connected to three communication subnets of the IPv6 domain. And both are connected to the IPv4 domain.
  • the mobile IPv6 node (hereinafter referred to as "mobile node,") 20 belongs to the IPv6 communication subnet under the jurisdiction of the first edge router 11, and the first edge router 1 1 implements the IPv6/IPv4 network address and The function of the protocol converter and the home agent, the mobile node 20 communicates with the IPv4 node in the IPv4 domain via the first edge router 11.
  • the network administrator assigns a certain number of IPv4 addresses (usually called a temporary IPv4 address set) to each edge router, by each edge router Dynamically assign an IPv4 address to a mobile IPv6 node that needs to communicate with an IPv4 node.
  • IPv4 addresses usually called a temporary IPv4 address set
  • the first edge router 11 assigns an IPv4 address to the mobile node 20 so that the mobile node 20 communicates with the IPv4 node.
  • the IPv4 address is referred to as the temporary IPv4 address of the mobile node 20.
  • the first edge router 11 broadcasts a route advertisement message (or a routing information message) to the IPv4 domain.
  • the route advertisement message usually includes information about all the temporary IPv4 addresses, that is, the first edge router is indicated. 11 may receive and forward the data packet sent to the IPv4 address in the temporary IPv4 address set.
  • the first edge router 11 performs a packet from the IPv6 communication protocol to the IPv4 communication protocol (or the data packet sent by the IPv4 node to the mobile node 20) to the IPv4 node based on the temporary IPv4 address assigned to the mobile node 20 (or Protocol conversion processing from IPv4 communication protocol to IPv6 communication protocol).
  • the mobile node 20 moves to another communication subnet (foreign subnet or visited subnet) of the IPv6 domain under the jurisdiction of the second edge router 12, the communication of the mobile node 20 with the IPv4 node still needs to pass through the first edge router 11 .
  • the first edge router 1 is referred to as the home edge router of the mobile node 20, and the second edge router 12 is the access edge router of the mobile node 20.
  • the mobile node 20 when the mobile node 20 moves to the visited subnet, first obtains an access network address (or referred to as a care-of address, COA, Care of Address) according to the network prefix of the visited subnet broadcasted by the second edge router 12. Or; a DHCP server in the subnet of the visited site (for clarity, the DHCP server is not shown in Figure 1) is assigned a visited network address. The mobile node 20 then sends a Binding Update message to the first edge router 11 via the second edge router 12 to inform the first edge router 1 of its visited network address.
  • COA care-of address
  • the data packet sent from the IPv4 node to the mobile node 20 is still routed to the first edge router 1 1 , and the first edge router 11 performs the slave IPv4 communication protocol on the data packet based on the temporary IPv4 address of the mobile node 20
  • an IPv6 packet header is added before the protocol-converted data packet by using the IP tunneling technology, and then sent to the second edge router 12.
  • the destination address in the added IPv6 header is The access address of the mobile node, and the source address is the IPv6 address of the first edge router 11.
  • the second edge router 12 forwards the packet to the mobile node 20.
  • the mobile node 20 removes the IPv6 header added by the first edge router 11 and obtains the data packet after the protocol conversion.
  • the routing path of the data packet is as shown in the figure.
  • the two-way thick arrow in 1 is shown.
  • the data packet sent by the mobile node 20 has two layers of IP headers, and the source address of the IP header is the home network address of the mobile node 20, and the destination address is the IPv4 node.
  • the IPv6 address of the outer layer IP address header is the access network address of the mobile node 20, and the destination address is the IPv6 address of the home edge router.
  • the data packet is sent to the second edge router 12, and the second edge router 12 sends the data packet to the first edge router 11, and the first edge router 11 performs the slave packet from the IPv4 based on the temporary IPv4 address of the mobile node 20.
  • the protocol of the communication protocol to the IPv6 communication protocol is converted, and then the data packet processed by the protocol conversion is sent to the IPv4 node, and the routing path of the data packet is as shown by the two-way thick arrow in FIG.
  • the present invention proposes an edge router for connecting to a first type of communication network (such as the above IPv6 communication network) and a second type of communication network (such as the above IPv4 communication network). Controlling one communication subnet (home subnet) belonging to the first type of communication network and moving to the mobile node of the other communication subnet (access subnet) belonging to the first type of communication network and the second type of communication network Technical solution for communication node communication.
  • a first type of communication network such as the above IPv6 communication network
  • a second type of communication network such as the above IPv4 communication network
  • the edge router accessing the subnet acquires a second type network address corresponding to the second type communication network of the mobile node and an address pair of the first type network address corresponding to the first type communication network; and then, based on the address pair control The shift
  • the mobile node communicates with the communication node.
  • the edge router in the home subnet of the mobile node notifies the edge address router in the visited subnet where the mobile node is located.
  • a method for controlling a mobile node in a first type of communication network based on a first communication protocol and a second type communication based on a second communication protocol in an edge router of a communication network A method for the communication node in the network to communicate, wherein the subnet of the first type of communication network governed by the edge router is an access subnet in which the mobile node is located, and the method includes the following steps: I. Acquiring a second type network address of the mobile node corresponding to the second type communication network and a first type network address corresponding to the first type communication network; II. the second based on the mobile node The class network address and the first type of network address control the mobile node to communicate with the communication node.
  • a method for assisting control of a mobile node in a first type of communication network based on a first communication protocol and a second class based on a second communication protocol in an edge router of a communication network A method for communication by a communication node in a communication network, wherein a subnet of a first type of communication network governed by the edge router is a home subnet of the mobile node, and the mobile node is under another edge router
  • the access subnet of the first type of communication network is characterized in that the method comprises the following steps: ii. Configuring a second type of network address corresponding to the second type of communication network of the mobile node and corresponding to the first type of communication network
  • the first type of network address informs the other edge router.
  • a method for controlling a mobile node in a first type of communication network based on a first communication protocol and a second type communication based on a second communication protocol in an edge router of a communication network a communication control device that communicates with a communication node in the network, wherein a subnet of the first type of communication network governed by the edge router is an access subnet in which the mobile node is located, wherein the communication control device includes An acquisition device and a control device.
  • the first obtaining device is configured to acquire a second type network address corresponding to the second type communication network of the mobile node and a first type network address corresponding to the first type communication network; Based on the movement The second type of network address of the node and the first type of network address control the mobile node to communicate with the communication node.
  • a method for assisting control of a mobile node in a first type of communication network based on a first communication protocol and a second class based on a second communication protocol in an edge router of a communication network An auxiliary control device for communicating by a communication node in a communication network, wherein a subnet of a first type of communication network governed by the edge router is a home subnet of the mobile node, and the mobile node is located at another edge router
  • An access subnet of a first type of communication network wherein the auxiliary control device includes a notification device, and the notification device is configured to use a second type of network address corresponding to the second type of communication network of the mobile node and The first type of network address corresponding to a type of communication network notifies the other edge router.
  • the first type of communication network is a communication network based on an IPv6 communication protocol
  • the second type of communication network is a communication network based on an IPv4 communication protocol.
  • a method and apparatus for assisting in controlling communication between a mobile node moving to a subnet belonging to a first type of communication network and a communication node in a second type of communication network in an edge router of a home subnet of the mobile node It effectively optimizes the routing path of information and reduces the load on edge routers in the home subnet. And when the edge router in the home subnet fails, communication between the mobile node moving to the visited subnet and the communication node in the second type of communication network is not suspended.
  • the mobile node may also send a binding update message to the edge router of the visited place, and then notify the home edge device or other edge routers by the edge router of the visited place, so that the switching time of the mobile node is greatly reduced. Speed up the mobile node switching process.
  • the present invention can effectively balance the load between the edge routers by exchanging the network addresses of the second type of communication networks managed by the edge routers.
  • FIG. 1 is a schematic diagram of a routing path of a data packet in the prior art
  • FIG. 2 is a schematic illustration of a routing path of a data packet in accordance with an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a routing path of a data packet according to another embodiment of the present invention.
  • FIG. 4 is a diagram for controlling a mobile node in a first type of communication network based on a first communication protocol and a second based on a second communication protocol in an access edge router of a communication network according to an embodiment of the present invention
  • FIG. 5 is a flow chart showing the accessing of the geo-router controlling the mobile node to transmit information to the communication node in step S12 of FIG. 4 in accordance with a preferred embodiment of the present invention
  • FIG. 6 is another flow diagram of the access edge router controlling the communication node transmitting information to the mobile node in step S12 of FIG. 4 in accordance with a preferred embodiment of the present invention
  • FIG. 7 is another flow diagram of the control communication node transmitting information to the mobile node in the access edge router in step S12 of Figure 4, in accordance with a preferred embodiment of the present invention
  • FIG. 8 is a second type of network address corresponding to a second type of communication network corresponding to a second type of communication network used by a home edge router of a communication network to notify an access edge router mobile node and corresponding to a first type of communication network, in accordance with an embodiment of the present invention.
  • FIG. 9 is a flow diagram of a home edge router of a communication network for controlling a communication node to transmit information to a mobile node in accordance with an embodiment of the present invention
  • FIG. 10 is a diagram for controlling a mobile node in a first type of communication network based on a first communication protocol and a second type communication network based on a second communication protocol in an edge router of a communication network according to an embodiment of the present invention.
  • Figure 11 is an edge routing of a communication network in accordance with an embodiment of the present invention.
  • the mobile node 20 belongs to a communication subnet of the first type of communication network governed by the first edge router 11, that is, the home subnet of the mobile node 20; the mobile node 20 is currently located under the jurisdiction of the second edge router 12. In another communication subnet of the first type of communication network, that is, the access subnet of the mobile node 20.
  • IPv6 domain the first type of communication network based on the IPv6 communication protocol
  • IPv4 domain the second type communication network based on the IPv4 communication protocol
  • the mobile node 20 when the mobile node 20 moves to the access subnet of the IPv6 domain under the jurisdiction of the second edge router 12, it first needs to obtain a visited network address. Specifically, the mobile node 20 may obtain an access network address (or call forwarding) according to the subnet information of the subnet (for example, the subnet address prefix) broadcast by the second edge router 12 and combined with the part of the MAC address. Address, COA, Care of Address), or requesting a visited network address to a DHCP server in the subnet (for simplicity, the DHCP server is not shown in Figure 2).
  • the subnet information of the subnet for example, the subnet address prefix
  • the DHCP server for simplicity, the DHCP server is not shown in Figure 2.
  • the mobile node 20 passes the second edge router 12 to the first edge router.
  • the home edge router 11 (i.e., the home edge router) sends a binding update message to notify the first edge router 1 1 of the visited network address of the mobile node 20.
  • the first edge router 11 may update the subnet included in the current visited network address corresponding to the edge node 20 in the binding update message.
  • the address prefix may determine the subnet in which the mobile node 20 is currently located (i.e., the IPv6 communication subnet governed by the second edge router 12), and then notify the second edge router 12 of the temporary IPv4 address assigned to the mobile node 20. Since the mobile node 20 can be identified by its visited network address or home network address, the first edge router 11 can notify the second edge router 12 of the visited network address of the mobile node 20 and the temporary IPv4 address; or the mobile node The home network address of 20 and the IPv4 address are notified to the second edge router 12.
  • the second edge router 12 controls the communication between the mobile node 20 and the IPv4 node based on the address pair.
  • the first edge router 11 notifies the temporary IPv4 address and the visited network address or the temporary IPv4 address and the home network address of the mobile node 20
  • the second edge router 12 may also be configured by the mobile node. 20 directly obtain its temporary IPv4 address and access network address or temporary IPv4 address and home network address.
  • the second edge router 12 may base the obtained address pair based on the foregoing ( That is, the temporary IPv4 address of the mobile node 20 and the visited network address or the temporary IPv4 address and the home network address), the protocol conversion processing from the IPv4 communication protocol to the IPv6 communication protocol is performed on the data packet; and then, the protocol converted data is executed.
  • the packet is sent directly to the IPv4 domain.
  • the data packet is routed to the IPv4 node in the IPv4 domain.
  • the routing process of the data packet in the IPv4 domain is a common knowledge that should be known to those skilled in the art, and the present invention will not be repeated here.
  • IPv4 or IPv6
  • IPv4 or IPv6
  • IPv4 IPv6
  • the second edge router 12 performs protocol conversion processing on the data packet sent by the mobile node 20 to the IPv4 node, only the destination address corresponding to the data packet (that is, the IPv6 corresponding to the IPv4 node) is required.
  • the IPv6 address of the IPv4 node can be obtained by removing the prefix of the first 96 bits in the address).
  • the second edge router 12 can receive data from the IPv4 node forwarded by other edge routers (eg, the first edge router 1 1 ) The packet is then forwarded to the mobile node 20; or the data packet from the IPv4 domain is directly received and forwarded to the mobile node 20.
  • edge routers eg, the first edge router 1 1
  • the data packet sent by the IPv4 node to the mobile node 20 is still routed to the first edge router. 1 1.
  • the first edge router 11 can perform protocol conversion processing on the data packet, and then send it to the second edge router 12, and the second edge router 12 sends the protocol converted data packet to the mobile node 20.
  • the forwarding path of the packet is the same as in the prior art.
  • the first edge router 11 may directly send the data packet to the second edge router 12, and the second edge router 12 performs protocol conversion on the data packet. After processing, it is sent to the mobile node 20.
  • the second edge router 12 includes the IPv4 address information corresponding to the mobile node 20 in the route advertisement message broadcasted to the IPv4 domain, that is, the route advertisement message is used to indicate that the edge router can receive and forward the second communication network.
  • the route advertisement message broadcast by the first edge router 1 1 to the IPv4 domain no longer contains The temporary IPv4 address of the mobile node, the data packet sent by the IPv4 node to the mobile node is directly routed from the IPv4 domain to the access edge router of the mobile node, that is, the second edge router 12.
  • the second edge router 12 After receiving the data packet, the second edge router 12 performs protocol conversion processing from the IPv4 communication protocol to the IPv6 communication protocol on the data packet based on the IPv4 temporary address corresponding to the mobile node 20; and then, converts the protocol converted data.
  • the packet is sent to the IPv6 node.
  • the packet forwarding path shown in Figure 2 when moving When the node 20 moves to the visited subnet, it can communicate with the IPv4 node via the access ground edge router without passing through the home edge router, thereby reducing the load on the access edge router and moving when the access edge router fails. Communication between node 20 and IPv4 nodes will not be aborted.
  • each edge router can notify its other temporary IPv4 address set to other edge routers and move its jurisdiction to the mobile nodes of other IPv6 communication subnets.
  • the temporary IPv4 address and the address pair of the access network address or the address pair of the temporary IPv4 address and the home network address are notified to other edge routers.
  • the address in the temporary IPv4 address set in an edge router changes or the network address of the mobile node that is moved to other IP v6 communication subnets changes, it is also necessary to notify other edge routers in time.
  • the information of the temporary IPv4 address set in each edge router and the access address of each mobile node moving to the visited subnet are consistent.
  • each edge router may also notify other edge routers of the temporary IPv4 address of each mobile node in the home subnet and the address pair information of the home network address, so that other edge routers receive the other edge routers.
  • protocol conversion processing can be performed on the data packet based on the temporary IPv4 address of each mobile node and the address address of the home network address, and corresponding forwarding is performed.
  • each edge router has various implementations of the temporary IPv4 address set information and the address information of the mobile node to notify other edge routers.
  • An implementation manner is implemented in an arbitrary broadcast group.
  • Each edge router joins an arbitrary broadcast group, and each edge router shares its own temporary IPv4 address set information and each mobile node address pair under the jurisdiction of any broadcast group.
  • Information each mobile node sends its updated access network address information to a member of the anycast group, and then the member shares each mobile node within the scope of the anycast group.
  • Access network address information (for the specific implementation of any broadcast group, you can refer to
  • Another implementation method is to set up a central server (which can be served by an edge router as the central server, or an additional network device to serve as the central server), and each edge router can set its own temporary IPv4 address set information. And the address pair information of each mobile node under its jurisdiction is sent to the central server, and then sent by the central server to each edge router; each mobile node sends its updated access network address information to the central server, and then The central server is sent to each edge router separately.
  • a central server which can be served by an edge router as the central server, or an additional network device to serve as the central server
  • each edge router can set its own temporary IPv4 address set information.
  • Another implementation manner is to use the routing header of the IPv6 data packet to implement temporary IPv4 address set information in each edge router and address information exchange of each mobile node under the jurisdiction of each edge router. For example, in FIG. 3, when the first edge router 11 is just started, an IPv6 packet for notifying the temporary IPv4 address set information it manages may be sent to the third edge router 13, which is specified in the IPv6 header. The data packet must pass through the second edge router 12.
  • an IP multicast group can also be established to exchange temporary IPv4 addresses in each edge router and access network address information of mobile nodes moving to other IPv6 communication subnets.
  • FIG. 1 to FIG. 3 the schematic diagram of the network topology structure in which the IPv6 domain includes three communication subnets is shown in FIG. 1 to FIG. 3, those skilled in the art should understand that the present invention is not limited thereto, and the technical solution of the present invention Applicable to network topology with multiple IPv6
  • the case of a communication subnet Specifically, how many IPv6 address set information is exchanged between edge routers in the IPv6 communication subnet, and an address pair of the mobile node's temporary IPv4 address and the visited network address or an address pair information of the temporary IPv4 address and the home network address , depending on the specific network deployment. For example, a network operator sets up ten IPv6 domain communication subnets at the edge of the IPv4 backbone network.
  • One edge router in each communication subnet connects to the communication subnet and connects to the IPv4 backbone network.
  • the edge router is responsible for the protocol conversion processing of the communication packets of the IPv4 node and the IPv6 node, and supports the mobility of the IPv6 node.
  • temporary IPv4 address set information and temporary IPv4 address information of the mobile node are exchanged between the ten edge routers.
  • the routing advertisement message broadcast by each edge router to the IPv4 domain includes not only the temporary IPv4 address information managed by the edge router ( Or the temporary IPv4 address information managed by the edge router may also include temporary IPv4 address set information managed by other edge routers (or used temporary IPv4 address information managed by other edge routers).
  • the packets sent by the IPv4 node to the IPv6 node are routed to the edge router closest to the IPv4 node. Specifically, as shown in the packet routing path in FIG.
  • the route advertisement message broadcasted by the third edge router 13 to the IPv4 domain also includes the mobile Temporary IPv4 address information for node 20. It is assumed that the third edge router 13 is closest to the IPv4 node compared to other edge routers, and the packet sent by the IPv4 node to the mobile node 20 is routed to the third edge router 13, and then the packet is sent by the third edge router 13
  • the protocol conversion process from the IPv4 communication protocol to the IPv6 communication protocol is performed and sent to the second edge router 12.
  • the second edge router 12 transmits the protocol converted data packet to the mobile node. Or the third edge router 13 directly sends the received data packet to the second edge router 12, and the second edge router 12 performs protocol conversion from the IPv4 communication protocol to the IPv6 communication protocol, and then sends the data packet to the mobile node 20. .
  • routing path of the data packet sent by the IPv4 node to the mobile node 20 is shown in FIG. 3, and the path for the mobile node 20 to send the data packet of the IPv4 node is illustrated.
  • the path may be the reverse path of the routing path shown in FIG. 3, or may be the routing path as shown in FIG. 2, depending on the specific routing policy.
  • each edge router exchanges temporary IPv4 address set information and address pair information of each mobile node under its jurisdiction, there may be multiple communication paths between the mobile node 20 and the IPv4 node.
  • an edge router in one of the paths fails, another communication path can be selected for communication.
  • the communication path through other edge routers can be selected to communicate with the mobile node 20 and the IPv4 node, thereby balancing the load of each edge router.
  • the alternate link can also communicate with the IPv4 node via the second edge router 12.
  • the switching time of the mobile node 20 switching from one communication subnet to (or moving to) another communication subnet is May be shortened.
  • the meaning of the switching time here is: from the mobile node to establish an initial contact with the new communication subnet (but still maintain the original communication with the original path) until the mobile node starts to use the new path in the new communication subnet Normally communicate with other IPv6 nodes or IPv4 nodes. Specifically, as shown in FIG.
  • the mobile node 20 belonging to the communication subnet under the jurisdiction of the first edge router 11 moves from the communication subnet under the jurisdiction of the second edge router 12 to the communication managed by the third edge router 13
  • the mobile node 20 sends a binding update message for notifying its new visited network address to the third edge router 13, and then the third edge router 13 forwards the binding update message to the second edge router 12 again.
  • the first edge router 1 1.
  • the new communication path of the mobile node 20 and the IPv4 node can be established in the following manner: Assuming that the first edge router 11 is the edge router closest to the IPv4 node, the IPv4 node sends The data packet to the mobile node 20 is directly routed from the IPv4 domain to the first edge router 11; since the binding update message has not yet reached the first edge router 11, the first edge router 11 still sends the data packet to the first edge router 11 Two edge router 12; second After receiving the data packet, the edge router 12 transmits the data packet to the third edge router 13 based on the new network address information of the mobile node 20, and then transmits it to the mobile node 20 by the third edge router 13. According to the prior art, when the binding update message arrives at the first edge router 1 1 , a new communication path between the mobile node 20 and the IPv4 node can be established. Therefore, the switching time of the mobile node 20 is shortened.
  • FIG. 4 illustrates a mobile node in a first type of communication network based on a first communication protocol and a second class based on a second communication protocol in an edge router of a communication network in accordance with an embodiment of the present invention.
  • the subnet of the first type of communication network governed by the edge router is a subnet of the access point where the mobile node is currently located, that is, the edge router is an edge router in the subnet of the mobile node, that is, the access edge router .
  • the network topology shown in FIG. 2 is taken as an example.
  • a mobile node in an access edge router for controlling a first type of communication network based on a first communication protocol and a second communication protocol are used.
  • a flow of communication performed by a communication node in the second type of communication network will be described.
  • the second edge router 12 acquires a second type of network address of the mobile node 20 corresponding to the second type of communication network and a first type of network address corresponding to the first type of communication network.
  • the second type network address corresponding to the second type communication network and the first type network address corresponding to the first type communication network of the mobile node may be obtained from an edge router in the home subnet of the mobile node, or A second type of network address corresponding to the second type of communication network and a first type of network address corresponding to the first type of communication network are obtained from the mobile node.
  • the first type of network address includes the home network address obtained by the mobile node at the home subnet and/or the visited network address obtained at the visited subnet.
  • step S12 the second edge router 12 controls the mobile node 20 to communicate with the communication node based on the second type of network address of the mobile node 20 and the first type of network address.
  • the communication between the mobile node 20 and the communication node includes two scenarios: Case 1.
  • the mobile node 20 transmits information to the communication node; Case 2.
  • the communication node sends a message The information is given to the mobile node 20.
  • the mobile node 20 sends a message to the communication node.
  • FIG. 5 is a flow diagram showing the second edge router 12 controlling the mobile node 20 to transmit information to the correspondent node in step S12 of Figure 4 in accordance with a preferred embodiment of the present invention.
  • step S121 1 the second edge router 12 receives the first information from the mobile node 20 destined for the communication node.
  • step S1212 the second edge router 12 performs a first protocol conversion process from the first communication protocol to the second communication protocol on the first information based on the second type network address of the mobile node and the first type network address, Obtaining the first information converted by the first protocol.
  • step S1213 the second edge router 12 sends the first information converted by the first protocol to the communication node.
  • the following takes the communication network shown in FIG. 2 as an example.
  • the process of the first protocol conversion process performed by the edge router on the first information from the mobile node in the first type of communication network will be described.
  • the first type of communication network based on the IPv6 communication protocol and the second type of communication network based on the IPv4 communication protocol are taken as an example.
  • the communication node in the second type of communication network is an IPv4 node
  • the first information is an IP data packet. .
  • the mobile node 20 can communicate with a communication node (ie, an IPv4 node) in an IPv4 domain by using its home network address obtained in the subnet of the IPv6 domain, or can use it.
  • the access network address of the IPv6 domain accesses the network address to communicate with the IPv4 node, or simultaneously communicates with the IPv4 node by using the home network address and the visited network address, that is, the source of the IPv6 packet sent by the mobile node.
  • the address may be the home network address of the mobile node 20; or the access address network address of the mobile node 20; or the IP tunneling technique in the prior art, that is, the IPv6 data packet has two layers of IP headers, one of which The source address of the layer IP header is the home network address of the mobile node 20, the destination address is the IPv6 address corresponding to the IPv4 node, and the source address of the outer layer IP header is the network address of the mobile node 20.
  • the destination address is the IP network address of the second edge router 12.
  • the second edge router 12 After receiving the data packet sent by the mobile node 20 to the IPv4 node, the second edge router 12 performs protocol conversion processing from the IPv6 communication protocol to the IPv4 communication protocol on the data packet by using the obtained temporary IPv4 address corresponding to the mobile node 20. Translating the destination address in the data packet, that is, the IPv6 address corresponding to the IPv4 node into an IPv4 address (that is, removing the 96-bit prefix of the IPv6 address, obtaining the IPv4 address of the IPv4 node); and based on obtaining the temporary IPv4 of the mobile node. The address information is converted into a temporary IPv4 address of the mobile node, and the corresponding protocol conversion processing is performed on the other parts of the data packet.
  • the present invention is not described herein again.
  • the data packet is transmitted by IP tunneling technology, it has two layers of IP headers, and the second edge router 12 needs to remove the outer layer IP header, and then performs the above on the source address and destination address of the inner IP header.
  • the conversion process, and the corresponding protocol conversion processing is performed on other parts of the data packet.
  • the communication node in the second type of communication network sends information to the mobile node in the first type of communication network.
  • the second edge router 12 forwards the second information from the communication node to the mobile node 20 to the mobile node 20. According to the difference of the routing path of the second information and whether the protocol conversion processing is performed by the second edge router 12, the following can be specifically classified into the following cases:
  • the second edge router 12 receives the second information from the communication node via the other edge router and performs a protocol conversion process on the second information and forwards it to the mobile node 20.
  • Figure 6 illustrates a preferred embodiment in accordance with the present invention. The flow chart for controlling the communication node to send information to the mobile node 20 in the second edge router 12 in step S12 shown in FIG.
  • step S1221 the second edge router 12 receives the second information from the communication node transmitted via the other edge router.
  • step S1222 the second edge router 12 performs a second protocol conversion process from the second communication protocol to the first communication protocol on the second information based on the second type network address of the mobile node and the first type network address, To obtain the first conversion by the second protocol .
  • step S1223 the second edge router 12 forwards the second information converted by the second protocol to the mobile node 20.
  • the second edge router 12 receives the second information from the communication node and is protocol-converted by any one of the other edge routers via the other edge routers, and forwards the second information converted by the protocol to the mobile node.
  • the second edge router 12 receives the second information sent to the mobile node 20 from the communication node in the second type of communication network transmitted via the other edge routers; and then transmits the protocol-converted second information to the mobile node 20 .
  • the first edge router 11 shown in FIG. 2 learns the second type network address corresponding to the mobile node 20, the second information Routed to the first edge router 11, and then the first edge router 11 performs protocol conversion processing from the second type of communication protocol to the first type of communication protocol, and sends the protocol-converted second information to the second information.
  • the second edge router 12 is further forwarded by the second edge router 12 to the mobile node 20.
  • the route advertisement message is used to indicate that each edge router can receive and forward the second communication separately.
  • the information of the network to the mobile node 20, the second information may be routed to any of the other edge routers, and then the edge router performs the same operation as the above-mentioned home edge router, that is, performs the slave information on the second information.
  • the second type of communication protocol is forwarded to the protocol conversion process of the first type of communication protocol, and the second information after the protocol conversion is sent to the second edge router 12, and then forwarded to the mobile node 20 by the second edge router 12.
  • the second edge router 12 directly receives the second information from the communication node by the second type of communication network, performs protocol conversion on the second information, and forwards the data to the mobile node 20.
  • the situation is based on the premise that the second edge router 12 learns the second type of network address of the mobile node 20 and broadcasts a route advertisement message to the second type of communication network.
  • the route advertisement message is used to instruct the second edge router 12 to receive and forward information from the second communication network to the mobile node 20, and to route the advertisement message to the second edge router 12 is set to preferentially receive an edge router that is sent to the second type of network address corresponding to the mobile node 20; or, the first edge router 11 broadcasts to the second type of communication when it learns that the mobile node 20 moves to another communication subnet.
  • the route advertisement message of the network no longer contains the second type of network address information corresponding to the mobile node 20, and other edge routers are not in the route advertisement message broadcasted to the second type communication network except the first edge router 1 1 Including the information of the second type of network address corresponding to the mobile node 20, the second information sent by the communication node to the mobile node 20 is directly routed from the second type of communication network to the second edge router 12 of the mobile node.
  • Fig. 7 shows another flow chart for controlling the communication node to transmit information to the mobile node 20 in the second edge router 12 in step S12 shown in Fig. 4 in this case.
  • step S1221 the second edge router 12 directly receives the second information from the communication node via the second type of communication network.
  • step S 1222' the second edge router 12 performs second protocol conversion from the second communication protocol to the first communication protocol based on the second type network address of the mobile node and the first type network address. Processing, to obtain the first conversion by the second protocol
  • step S1223' the second edge router 12 forwards the second information converted by the second protocol to the mobile node 20.
  • Step S1222' is the same as step S1223' and step S1222 and step S1223 shown in Fig. 6.
  • the process of controlling the mobile node 20 to communicate with the communication node in the access edge router of the mobile node 20 is described in detail above.
  • the process of assisting the mobile node 20 in communicating with the communication node in the home edge router of the mobile node 20 is described below. Be explained.
  • the mobile node 20 belongs to a communication subnet of the first type of communication network governed by the first edge router 1 1 , that is, the home subnet of the mobile node 20;
  • the mobile node 20 is currently located in another communication subnet of the first type of communication network governed by the second edge router 12, i.e., the visited subnet of the mobile node 20.
  • the auxiliary control shift in the first edge router 1 1 will be described below with reference to FIG. 2 and with reference to FIGS. 8 and 9. The process in which the mobile node 20 communicates with the communication node will be described.
  • the first edge router 11 Since the mobile node 20 moves to the visited subnet of the first type of communication network governed by the second edge router 12, the first edge router 11 needs to associate the mobile node 20 with the second type of communication network.
  • the class network address and the first type of network address corresponding to the first type of communication network notify the second edge router 12.
  • the first type of network address includes the home network address obtained by the mobile node 20 at the home subnet and/or the visited network address obtained at the visited local subnet.
  • the first edge router 1 When the first type of network address includes the visited network address of the mobile node 20, the first edge router 1 also needs to acquire the visited network address of the mobile node 20 when notifying the second edge router 12. When the first type of network address includes the visited network address of the mobile node 20, the first edge router 1 1 sets the second type of network address of the mobile node 20 corresponding to the second type of communication network and the first A flowchart of the first type of network address corresponding to the class-like communication network notifying the second edge router 12.
  • step S21 1 the first edge router 1 1 acquires the access network address obtained by the mobile node 20 at the visited subnet.
  • step S212 the first edge router 1 1 notifies the second edge router 12 of the network address of the second type of communication network corresponding to the mobile node 20 and the visited network address.
  • the first edge router 1 1 may also broadcast a broadcast advertisement message to the second type of communication network, the route advertisement message is used to notify the first edge router 1 1 that the router can receive And forwarding information from the second type of communication network to the mobile node 20.
  • the first edge router 1 1 executes the flowchart shown in FIG.
  • step S221 the first edge router 11 receives the second information from the communication node
  • step S222 the first edge router 11 forwards the second information to the second edge router 12, and the second edge router 12 forwards the second information to the mobile node 20. 08 001457 Specifically, if the second information conversion process of the second information from the second communication protocol to the first communication protocol is performed by the second edge router 12, the first edge router 1 1 directly takes the second step in step S222. The information is forwarded to the second edge router 12.
  • the first edge router 11 is based on the second type network address of the mobile node 20 and the first a type of network address, performing second protocol conversion processing from the second communication protocol to the first communication protocol on the second information to obtain second information converted by the second protocol; and then converting the second information converted by the second protocol Forwarded to the second edge router 12.
  • Figure 10 illustrates a mobile node in a first type of communication network based on a first communication protocol and a second class based on a second communication protocol in an edge router of a communication network in accordance with an embodiment of the present invention.
  • the communication control device 100 includes a first acquisition device 101, a control device 102, and a first broadcast device 103.
  • the control device 102 specifically includes a first receiving device 1021, a first converting device 1022, a first transmitting device 1023, and a first forwarding device 1024.
  • the first forwarding device 1024 specifically includes a second receiving device 10241, a second converting device 10242, and a second transmitting device 10243.
  • the optional sub-devices of many preferred embodiments are shown in FIG. 11. Those skilled in the art will understand from the teachings of the present application that only the first acquisition device 101 and the control device 102 are implemented. The device necessary for the present invention, the other sub-devices are optional devices.
  • the mobile node 20 belongs to a communication subnet of the first type of communication network governed by the first edge router 1 1 , that is, the home subnet of the mobile node 20 .
  • the mobile node 20 is currently located in another communication subnet of the first type of communication network governed by the second edge router 12, ie, the visited subnet of the mobile node 20.
  • the communication control device 100 is located in the second edge router 12, and the process in which the communication control device 100 in the second edge router 12 controls the mobile node 20 to communicate with the communication node will be described below with reference to FIG. 2 and FIG.
  • the first obtaining means 101 acquires a second type of network address of the mobile node 20 corresponding to the second type of communication network and a first type of network address corresponding to the first type of communication network.
  • the second type network address corresponding to the second type communication network and the first type corresponding to the first type communication network can be obtained from the edge router in the home subnet of the mobile node 20, that is, the edge router 11
  • a type of network address may also be obtained from the mobile node 20 for a second type of network address corresponding to its second type of communication network and a first type of network address corresponding to the first type of communication network.
  • the first type of network address includes a home network address obtained by the mobile node at the home subnet and/or a visited network address obtained at the visited subnet.
  • Control device 102 then controls mobile node 20 to communicate with the communication node based on the second type of network address of mobile node 20 and the first type of network address.
  • the process in which the mobile node 20 communicates with the communication node includes two scenarios: Situation 1.
  • the mobile node transmits information to the communication node 20; Case 2.
  • the communication node transmits information to the mobile node 20.
  • the mobile node 20 sends a message to the communication node.
  • the first receiving device 1021 receives the first information from the mobile node 20 destined for the communication node.
  • the first converting means 1022 performs a first protocol conversion process from the first communication protocol to the second communication protocol on the first information based on the second type network address of the mobile node 20 and the first type of network address, to obtain a The first information of a protocol conversion.
  • the first transmitting device 1023 sends the first information converted by the first protocol to the communication node.
  • the first forwarding device 1024 forwards the second information from the corresponding node to the mobile node 20 to the mobile node 20. According to the difference of the routing path of the second information and whether the protocol conversion process is performed by the accessing edge router, the following can be specifically classified into the following cases:
  • the communication control device 100 receives from the communication node via other edge routers
  • the second information is forwarded to the mobile node 20 after performing the protocol conversion process on the second information.
  • the second receiving device 1041 receives the second information from the communication node transmitted via the other edge router.
  • the second converting means 1042 performs a second protocol conversion process from the second communication protocol to the first communication protocol on the second information based on the second type network address of the mobile node 20 and the first type of network address, to obtain a The second information of the second protocol conversion.
  • the second transmitting device 10243 forwards the second information converted by the second protocol to the mobile node 20.
  • the communication control device 100 receives the second information from the communication node and performs protocol conversion by any one of the other edge routers via the other edge router, and forwards the second information converted by the protocol to the mobile node 20
  • the second receiving device 1041 receives the second information sent to the mobile node 20 from the communication node in the second type communication network transmitted via the other edge router; then, the second transmitting device 10243 converts the protocol-converted second information. Sent to mobile node 20.
  • the edge routers in the home subnet of the mobile node 20 in other edge routers that is, the first edge router 11 shown in FIG. 2, know the second type network address corresponding to the mobile node, the second information is Routed to the first edge router 11, and then the first edge router 11 performs protocol conversion processing from the second type communication protocol to the first type communication protocol to the second information, and sends the protocol converted second information to the communication Control device 100.
  • the second receiving device 10241 receives the second information after the protocol conversion, and is sent by the second transmitting device 10243 to the mobile node.
  • the route advertisement message is used to indicate that each edge router can receive and forward the second communication network.
  • Information to the mobile node the second information may be routed to any of the other edge routers, and then the edge router performs the same operation as the above-mentioned home edge router, that is, performs the second information from the second class. Transmitting the communication protocol to the protocol of the first type of communication protocol, and transmitting the second information after the protocol conversion to the access edge router.
  • the receiving device 1041 receives the second information after the protocol conversion, and is sent by the second transmitting device 10243 to the mobile node.
  • the communication control device 100 directly receives the second information from the communication node from the second type of communication network, performs protocol conversion on the second information, and forwards the data to the mobile node 20.
  • the situation is based on the premise that the first acquisition device 101 A second type of network address of the mobile node is learned, and the first advertisement device 103 broadcasts a route advertisement message to the second type of communication network.
  • the route advertisement message is used to indicate that the second edge router 12 can receive and forward the information from the second communication network to the mobile node, and in the route advertisement message, the second edge router 12 sends the priority to the second class corresponding to the mobile node.
  • the second receiving device 10241 receives the second information from the communication node. Then, the second converting device 1042 performs a second protocol conversion process from the second communication protocol to the first communication protocol on the second information based on the second type network address of the mobile node 20 and the first type of network address, to obtain a The second information of the second protocol conversion.
  • the second transmitting device 10243 forwards the second information converted by the second protocol to the mobile node 20.
  • FIG. 1 shows a mobile node in a first type of communication network based on a first communication protocol and a second communication protocol based in an edge router of a communication network in accordance with an embodiment of the present invention.
  • the auxiliary control device 200 includes a second The acquisition device 201, the notification device 205, the second broadcast device 203, the third reception device 204, and the second forwarding device 205.
  • the second forwarding device 205 specifically includes a third converting device 2052 and a third transmitting device 2051.
  • optional sub-devices in many preferred embodiments are shown in FIG. 12, and those skilled in the art, in light of the teachings of the present application, will understand that only notification device 202 is a device necessary to practice the present invention. Other sub-devices are optional.
  • the mobile node 20 belongs to a communication subnet of the first type of communication network governed by the first edge router 1 1 , that is, the home subnet of the mobile node 20;
  • the mobile node 20 is currently located in another communication subnet of the first type of communication network governed by the second edge router 12, i.e., the visited subnet of the mobile node 20.
  • the auxiliary control device 200 is located in the first edge router 1 1 , and the process in which the auxiliary control device 200 in the first edge router 1 1 assists the control of the mobile node 20 to communicate with the communication node will be described below with reference to FIG. 2 and with reference to FIG.
  • the notifying means 202 needs to set the second type of network address of the mobile node 20 corresponding to the second type of communication network. And notifying the second edge router 12 of the first type of network address corresponding to the first type of communication network.
  • the first type of network address includes the home network address obtained by the mobile node 20 at the home subnet and/or the visited network address obtained at the visited subnet.
  • the access network address of the mobile node 20 needs to be acquired by the second obtaining means 201 before the notification means 202 notifies the accessing edge router.
  • the second obtaining means 201 acquires the access network address obtained by the mobile node 20 at the visited subnet.
  • the notifying device 202 notifies the second edge router 12 of the network address of the second type communication network corresponding to the mobile node 20 and the access network address.
  • the second broadcast device 203 may also broadcast a route advertisement message to the second type of communication network, the route advertisement message being used to notify the first edge router 11 that it can receive and Information from the second type of communication network is forwarded to the mobile node 20.
  • the second information from the communication node to the mobile node 20 is routed to the first edge router 11, first, the second information from the communication node is received by the third receiving device 204; then, the second forwarding device 205 forwards the second information to the second edge router 12, which in turn forwards the second information to the mobile node 20.
  • the second forwarding device 205 directly forwards the second information to the second edge router. 20.
  • the third conversion device 2052 is based on the second type network address of the mobile node 20 and the first class. a network address, performing second protocol conversion processing from the second communication protocol to the first communication protocol on the second information, to obtain second information converted by the second protocol; and then the third transmitting device 2051 converts the second protocol The second information is forwarded to the second edge router 12.
  • the implementation of the present invention has been described above from the perspective that the communication control device 100 is located in the access edge router of the mobile node and the auxiliary control device 200 is located in the home edge router of the mobile node. Since there may be multiple mobile nodes in the communication subnet governed by each edge router, the edge router is both the home edge router of one mobile node and the access edge router of another mobile node. Therefore, when both the communication control device 100 and the auxiliary control device 200 are included in one edge router, the devices performing the same function can be combined.
  • the second converting means 10242 and the third converting means 2052 may be the same converting means; the second transmitting means 10241 and the third transmitting means 2051 may be the same transmitting means.
  • the present invention has been described in detail by taking the IPv4 communication protocol and the IPv6 communication protocol pair as an example, those skilled in the art should understand that the present invention is not limited to the IPv4 communication protocol and the IPv6 communication protocol pair according to the teachings of the present application. For other communication protocol pairs, the invention is equally applicable.
  • the type of the mobile node in the present invention is not limited, and includes all mobile network devices such as mobile terminals or mobile servers that can communicate with IPv4 nodes.
  • the technical solution of the present invention can be implemented by software or hardware.

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

Abstract

L'invention porte sur un scénario technologique, qui est dans une passerelle de bordure connectée à la fois à un réseau du premier type et à un réseau du second type, pour commander le nœud mobile se déplaçant vers un sous-réseau étranger du réseau du premier type pour communiquer avec le nœud de communication dans le réseau du second type. La passerelle de bordure du sous-réseau étranger acquiert l'adresse de réseau du second type du nœud mobile en premier lieu, puis commande le nœud mobile pour communiquer avec le nœud de communication selon ladite adresse. De préférence, la passerelle de bordure du nœudmobile qui est dans le sous-réseau de rattachement du réseau du premier type indique à la passerelle de bordure dans le sous-réseau étranger l'adresse du réseau de second type du nœud mobile.
PCT/CN2008/001457 2007-08-23 2008-08-13 Procédé et équipement pour commander un nœud mobile dans un réseau de communication communiquant avec un réseau hétérogène WO2009026783A1 (fr)

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CN2007100452437A CN101374097B (zh) 2007-08-23 2007-08-23 控制通信网络中移动节点与异类网络通信的方法及装置

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JP5857222B2 (ja) * 2011-12-16 2016-02-10 パナソニックＩｐマネジメント株式会社 無線ネットワークシステム、無線通信装置、及び、無線通信装置のプログラム

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CN1518301A (zh) * 2003-01-08 2004-08-04 �ձ�������ʽ���� 能允许最短通信路径的移动通信系统和方法
CN1989754A (zh) * 2004-07-23 2007-06-27 思科技术公司 用于在IPv6网络中实现路由优化和位置私密性的方法和设备
CN101019450A (zh) * 2004-07-30 2007-08-15 奥林奇股份有限公司 经由分组无线网络传送因特网分组数据的系统和方法
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