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CN1248462C - Method for realizing local network / broad network self adaption in flexible IP network technology system - Google Patents

Method for realizing local network / broad network self adaption in flexible IP network technology system Download PDF

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Publication number
CN1248462C
CN1248462C CNB2004100731681A CN200410073168A CN1248462C CN 1248462 C CN1248462 C CN 1248462C CN B2004100731681 A CNB2004100731681 A CN B2004100731681A CN 200410073168 A CN200410073168 A CN 200410073168A CN 1248462 C CN1248462 C CN 1248462C
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network
management entity
mobile node
area network
lan
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CN1588904A (en
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万晓辉
章忠威
李金成
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China Iwncomm Co Ltd
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China Iwncomm Co Ltd
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Abstract

The present invention relates to a method for realizing LAN / WAN self adaption in a flexible IP network technology system, which sets an access management entity on a network access point. A basic field management entity and the access management entity firstly establish the connection, and then the access management entity acquires the access information; a mobile node sends a login request to the access management entity from a private network, the login request is forwarded to the basic field management entity to verify the identity, and login answering is returned after the identity is verified; the basic field management entity firstly forwards the login answering to the mobile node by the access management entity, and after the login is successful and the effective information is acquired, the communication between the mobile node and the basic field management entity is set up. The present invention solves the LAN/WAN compatibility problem of the flexible IP network technology system to make the technology automatically apply to the current network topology environment, and according to the own basic network domain type, the corresponding login process and the corresponding tunnel module are executed to realize the normal roam of the flexible IP network technology system.

Description

Realize the adaptive method of LAN/WAN in a kind of flexible IP network technology system
Technical field
The present invention relates to a kind of adaptive method of flexible IP network technology system.Relate in particular to that a kind of to make flexible IP network technology system can discern the current network environment automatically be local area network (LAN) (LAN, Local Area Network) still be wide area network (WAN, Wide Area Network), thereby be suitable for current extended network territory environment automatically, with the method for true(-)running flexible IP network technology system.
Background technology
Along with the improvement of the volume of portable instruments such as development of Internet and notebook computer and PDA, weight, performance, the realization of mobile office becomes easily gradually.Mobile IP is by the Internet engineering duty (IETF of group, Internet Engineering Task Force) standard of Zhi Dinging, it is the solution of process IP host mobile communication in the internet, realize that the IP main frame keeps its original IP address identity when mobile, in not interrupt communication with do not restart under the situation of application program and need not change the link layer access point.The physical media that is adopted when mobile IP and IP main-machine communication is irrelevant.
The principle of tradition mobile IP system is: when mobile node was connected on the local network link, the working mechanism of mobile node was the same with stationary nodes, did not move mobile IP function.When the Network Access Point of mobile node is on the field network time from a link switchover to another link, under normal conditions, mobile node is through " agency's search ", on foreign link, find a foreign agent entity, promptly register, the Care-of Address of the IP address of this foreign agent entity as oneself to this foreign agent entity.After mobile node obtains Care-of Address, by register flow path, tell home proxy entity the Care-of Address of oneself again, the tunnel is set up in the back of succeeding in registration between home proxy entity and foreign agent entity.When mailing to the packet of mobile node local address, home proxy entity just intercepts this packet, and according to the Care-of Address of registering, sends packet to mobile node by the tunnel; The packet that is mail to home network by mobile node is delivered to home proxy entity by foreign agent entity from the tunnel.Therefore, traditional mobile IP system environment of applications limitation is big, and it can only be applied to the situation of the local area network (LAN) that situation that the IP address is publicly-owned address or two can route.
Summary of the invention
The object of the present invention is to provide in a kind of flexible IP network technology system the adaptive method of LAN/WAN that realizes, it is big that it has solved in the background technology limitation of applied environment, the technical problem that information transfer efficiency is low.
Technical solution of the present invention is:
Realize the adaptive method of LAN/WAN in a kind of flexible IP network technology system, its special character is: this method may further comprise the steps
1). place the access-in management entity 3 of data forwarding between a responsible mobile node 6 and the ground field management entity 1 in the Network Access Point position;
2). obtain the registration of information
When mobile node 6 is registered in the basic network territory, at first according to the registration broadcast that is received, judge whether the ground field management entity 1 of oneself supports wide area network, so that the basic network field type sign of whether supporting wide area network to be set; If ground field management entity 1 is supported wide area network, then preserve access-in management entity 3 addresses of wan type, carry out wide area network or local area network registration; If 1 of ground field management entity is supported local area network (LAN), then only on ground field management entity 1, carry out local area network registration, the address of not preserving access-in management entity 3;
3). mobile node 6 is in the registration and the foundation roaming of extended network territory identity verification
(3.1) if. 1 of basic network territory its ground field management entity of when registration is supported the local area network (LAN) roaming, and mobile node 6 carries out the negotiation of local area network (LAN) roaming:
(3.1.1). after the registration message that has a negotiation extensions was proved to be successful, the local area network (LAN) roaming was consulted successfully, then sets up corresponding IPinIP data tunnel, and mobile node 6 local area network (LAN)s are roamed and finished;
(3.1.2). the registration message checking that has negotiation extensions is unsuccessful, and then mobile node 6 residing network environments can't directly connect with its basic network territory by the local area network (LAN) roaming;
(3.2) if. 1 of basic network territory its ground field management entity of when registration is supported the wide area network roaming, at this moment
(3.2.1). if 7 of extending domain management entities are supported the roamings of local area network (LAN), and the registration message that mobile node 6 will have a negotiation extensions sends to ground field management entity 1 and verifies; If the success of mobile node 6 local area network (LAN)s roaming log-on consultation, then mobile node 6 is directly worked with the local area network (LAN) roaming system;
(3.2.2). if 7 of extending domain management entities are supported the wide area network roaming, 6 of mobile nodes judge whether the address of its access-in management entity 3 is identical: if identical, show the extending domain management entity 7 that is positioned at behind the same NAT, after 1 authentication of ground field management entity is passed through, set up corresponding IPinIP data tunnel, the roaming of mobile node 6 local area network (LAN)s is finished; If judge access-in management entity 3 address differences, show two network environments that are positioned at after the different network address translation, need carry out wide area network roaming, 1 authentication of ground field management entity by after set up corresponding IPinUDP data tunnel, the roaming of mobile node 6 wide area networks is finished;
4). when mobile node 6 is roamed go back to the basic network territory, if the address of the ground field management entity 1 that the broadcasting of mobile node 6 by ground field management entity 1 obtains is identical with the address of the ground field management entity 1 that mobile node 6 is preserved, judge that then mobile node 6 is in the environment of basic network territory; At this moment, mobile node 6 is not enabled roaming function, and it is 0 registration message that mobile node 6 sends registration lifetime to ground field management entity 1, nullifies this mobile node 6.
When above-mentioned mobile node 6 carries out wide area network registration or local area network registration, being provided with marker bit in the registration message indicates, registration message is handled according to the type of register requirement after arriving ground field management entity 1 or extending domain management entity 7, sets up corresponding tunnel; When mobile node 6 carries out the wide area network registration, after the authentication success, need further negotiate FPDP and could set up corresponding data tunnel, roam.
Above-mentioned network address translation is to hide the mode of the connection the Internet of internal network address, when the internal network mobile node 6 that is positioned at NAT server inboard connects the Internet, network address translation becomes an outside public ip address with the internal network IP address transition of mobile node 6, be stored in the address pool of network address translation, when external network data is returned, network address translation then oppositely replaces to destination address the address of initial inside mobile node 6, allows internal network mobile node 6 accept.
Above-mentioned tunnel be meant when packed packet transmits on public internet network the logical path of process.
Above-mentioned mobile node 6 be can with the position of entering the Internet from a link switchover to another link, and still keep all ongoing communications, and only use the equipment of original fixed ip address.
Above-mentioned flexible IP network technology system is meant by ground field management entity 1, extending domain management entity 7, access-in management entity 3 and mobile node 6 and constitutes, make mobile node 6 in the local area network (LAN) can be in the Global Internet scope arbitrarily roaming, and guarantee that mobile node 6 can realize the system of interactive access at any time with its basic network territory.
The present invention has the following advantages:
It is local area network (LAN) (LAN that the present invention makes flexible IP network technology system can discern current network environment automatically in different network environments, Local Area Network) still be wide area network (WAN, Wide Area Network), thereby make flexible IP network technology system can be suitable for current extended network territory environment automatically, correctly register, the tunnel that foundation adapts is finished data and is transmitted, and realizes the function of flexible IP network technology system.In other words, the invention solves the LAN/WAN compatibling problem of flexible IP network technology system, make flexible IP network technology system can be suitable for current network topology environment automatically, and carry out corresponding register flow path and carry out the corresponding tunnel module according to own basic network field type, finally realize the normal roaming of flexible IP network technology system; And select optimal tunnel style for use, improve the efficient that data transmit.
Description of drawings
Accompanying drawing is a flexible IP network technology system topological diagram of the present invention.
Drawing reference numeral explanation: 1-ground field management entity; 2-fire compartment wall, the i.e. fire compartment wall in basic network territory; 3-access-in management entity; 4-Internet, i.e. internet; 5-fire compartment wall, the i.e. fire compartment wall in extended network territory; The 6-mobile node; 7-extending domain management entity.
Embodiment
Flexible IP network technology system of the present invention is meant by the ground field management entity, the extending domain management entity, the access-in management entity, mobile node constitutes, make mobile node in the local area network (LAN) can be in the Global Internet scope arbitrarily roaming, and guarantee that mobile node can realize interactive access with its basic network territory at any time.
Flexible IP network technology system of the present invention is under these two kinds of network environments of local area network (LAN) LAN, wide area network WAN, and the type in flexible IP network technology system registration, the process of setting up the tunnel and tunnel is all different.The present invention places an access-in management entity 3 in the Network Access Point position, be responsible for the data forwarding between mobile node 6 and the ground field management entity 1.Ground field management entity 1 and access-in management entity 3 at first connect, network address translation, and promptly NAT is performed, and access-in management entity 3 is known the network access information of ground field management entity 1.Mobile node 6 sends register requirement from private network to access-in management entity 3, and NAT is performed.Access-in management entity 3 is transmitted to the ground field management entity 1 of mobile node 6 with this request, after the identity of ground field management entity 1 checking mobile node 6 is passed through, returns registration reply.Equally, ground field management entity 1 sends to access-in management entity 3 to registration reply earlier, is transmitted to mobile node 6 by access-in management entity 3 again.After registration is passed through, access-in management entity 3 is sensible to both sides the network access information of mobile node 6 and ground field management entity 1, after correctly obtaining effective information, set up the tunnel between mobile node 6 and ground field management entity 1, the foundation of communicating by letter of mobile node 6 and ground field management entity 1 finishes.
Can mobile node 6 promptly be supported to cross over the internet of NAT or/and wide area network is set up the flexible IP network technology system connection by the type of server in registration basic network territory, basic network territory.After roaming into the extended network territory, mobile node 6 obtains the type of current extending domain management entity 7, carries out the registration of respective type, sets up corresponding tunnel simultaneously after succeeding in registration, and finishes data and transmits.
Ground field management entity 1 need be set up in order to realize flexible IP network technology system in the basic network territory of mobile node 6.According to the use needs of roaming mobile node 6, use the inner system that realizes roaming of the private network that traditional function is only arranged, or use and set up the flexible IP network technology system of can passing through NAT realizing crossing over internet and/or wide area network.Both difference mainly are in the broadcasting that the flexible IP network technology system of wide area network acts on behalf of except carrying ground field management entity 1IP address, the IP address of also having carried access-in management entity 3.
Referring to accompanying drawing, specific implementation method of the present invention is as follows:
1. place an access-in management entity 3 in the Network Access Point position, be responsible for the data forwarding function between mobile node 6 and the ground field management entity 1.
2. obtain the registration of information: when mobile node 6 is registered in the basic network territory, at first according to the registration broadcast that is received, judge whether the ground field management entity 1 of oneself supports wide area network, so that the basic network field type sign of whether supporting wide area network, the i.e. type of ground field management entity 1 to be set; If ground field management entity 1 is supported wide area network, then preserve access-in management entity 3 addresses of wan type, carry out wide area network or local area network registration; If 1 of ground field management entity is supported local area network (LAN), then only on ground field management entity 1, carry out local area network registration, the address that can not preserve access-in management entity 3.
3. mobile node 6 is roamed in the registration and the foundation of extended network territory identity verification:
(1). 1 of its ground field management entity is supported the local area network (LAN) roaming during registration of basic network territory, and this moment, mobile node 6 all carried out the trial of local area network (LAN) roaming no matter the wide area network roaming be supported in the extended network territory can.
(1.1) if. local area network (LAN) roaming is consulted successfully, after the registration message that promptly has a negotiation extensions is proved to be successful, then sets up corresponding IPinIP data tunnel, and mobile node 6 local area network (LAN)s are roamed and finished;
(1.2) if. can't set up roaming after consulting, the registration message checking that promptly has negotiation extensions is unsuccessful, shows that mobile node 6 residing network environments can't directly connect with its basic network territory by the local area network (LAN) roaming.
(2). basic network territory its ground field management entity 1 of when registration is not supported the local area network (LAN) roaming, and when only supporting the wide area network roaming,
(2.1) if. 7 of extending domain management entities are supported the roamings of local area network (LAN), and mobile node 6 will carry out local area network (LAN) roaming log-on consultation, and the registration message that promptly has negotiation extensions sends to ground field management entity 1 and verifies.If the success of mobile node 6 local area network (LAN)s roaming log-on consultation, then mobile node 6 is directly worked with the local area network (LAN) roaming system;
(2.2) if. 7 of extending domain management entities are supported the wide area network roaming, and mobile node 6 needs judge whether the address of its access-in management entity 3 identical.If identical, show the extending domain management entity 7 that is positioned at behind the same NAT, after 1 authentication of ground field management entity is passed through, set up corresponding IPinIP data tunnel, the roaming of mobile node 6 local area network (LAN)s is finished; If judge access-in management entity 3 address differences, show two network environments that are positioned at behind the different NAT this moment, need carry out wide area network roaming, 1 authentication of ground field management entity by after set up corresponding IPinUDP data tunnel, the roaming of mobile node 6 wide area networks is finished.
4. when mobile node 6 is roamed go back to the basic network territory, if the address of the ground field management entity 1 that the broadcasting of mobile node 6 by ground field management entity 1 obtains is identical with the address of the ground field management entity 1 that mobile node 6 is preserved, then judge to be in the environment of basic network territory.At this moment, mobile node 6 is not enabled roaming function, and it is 0 registration message that mobile node 6 sends registration lifetime to ground field management entity 1, nullifies this mobile node 6.
Relevant technical terms explanation of the present invention:
The ground field management entity: the network equipment that has a port to link to each other with the basic network territory at mobile node place, for the mobile node that roaming takes place provides purview certification and identity agency.
The extending domain management entity: the network equipment on the extended network territory of mobile node, for mobile node is transmitted authentication message and packet.
The access-in management entity: having can be at the network equipment of the IP address of internet route, and it authenticates and transmit the trunking of mobile node packet to the mobile node identity between ground field management entity and extending domain management entity.
The basic network territory: mobile node is roamed the network at preceding place.
Extended network territory: the network that mobile node roaming back is arrived.
IP tunnel: be meant that an IP-based packet is encapsulated in the path of process when transmitting in the net load of another IP packet.
Tunneling technique: refer to comprise data encapsulation, the overall process in wrapping in is conciliate in transmission.
Mobile node: can with the position of entering the Internet from a link switchover to another link, and still keep all ongoing communications, and only use the equipment of original fixed ip address.

Claims (6)

1. realize the adaptive method of LAN/WAN in a flexible IP network technology system, it is characterized in that: this method may further comprise the steps
1). place the access-in management entity (3) of data forwarding between a responsible mobile node (6) and the ground field management entity (1) in the Network Access Point position;
2). obtain the registration of information
When mobile node (6) is registered in the basic network territory, at first according to the registration broadcast that is received, judge whether the ground field management entity (1) of oneself supports wide area network, so that the basic network field type sign of whether supporting wide area network to be set; If ground field management entity (1) is supported wide area network, then preserve access-in management entity (3) address of wan type, carry out wide area network or local area network registration; If ground field management entity (1) is only supported local area network (LAN), then only on ground field management entity (1), carry out local area network registration, do not preserve the address of access-in management entity (3);
3). mobile node (6) is in the registration and the foundation roaming of extended network territory identity verification
(3.1) if. basic network territory its ground field management entity (1) of when registration is only supported the local area network (LAN) roaming, and mobile node (6) carries out the negotiation of local area network (LAN) roaming:
(3.1.1). after the registration message that has a negotiation extensions was proved to be successful, the local area network (LAN) roaming was consulted successfully, then sets up corresponding IPinIP data tunnel, and mobile node (6) local area network (LAN) is roamed and finished;
(3.1.2). the registration message checking that has negotiation extensions is unsuccessful, and then the residing network environment of mobile node (6) can't directly connect with its basic network territory by the local area network (LAN) roaming;
(3.2) if. basic network territory its ground field management entity (1) of when registration is only supported the wide area network roaming, at this moment
(3.2.1). if extending domain management entity (7) is only supported the roaming of local area network (LAN), and the registration message that mobile node (6) will have a negotiation extensions sends to ground field management entity (1) and verifies; If the success of mobile node (6) local area network (LAN) roaming log-on consultation, then mobile node (6) is directly worked with the local area network (LAN) roaming system;
(3.2.2). if extending domain management entity (7) is only supported the wide area network roaming, mobile node (6) judges then whether the address of its access-in management entity (3) is identical: if identical, show the extending domain management entity (7) that is positioned at behind the same NAT, after ground field management entity (1) authentication is passed through, set up corresponding IPinIP data tunnel, the roaming of mobile node (6) local area network (LAN) is finished; If judge access-in management entity (3) address difference, show two network environments that are positioned at after the different network address translation, need carry out the wide area network roaming, ground field management entity (1) authentication by after set up corresponding IPinUDP data tunnel, mobile node (6) wide area network roaming is finished;
4). when mobile node (6) is roamed go back to the basic network territory, if the address of this ground field management entity (1) that the broadcasting of mobile node (6) by ground field management entity (1) obtains is identical with the address of the ground field management entity (1) that mobile node (6) is preserved, judge that then mobile node (6) is in the environment of basic network territory; At this moment, mobile node (6) is not enabled roaming function, and it is 0 registration message that mobile node (6) sends registration lifetime to ground field management entity (1), nullifies this mobile node (6);
Described ground field management entity (1) is the network equipment that provides purview certification and identity to act on behalf of, have a port to link to each other with the basic network territory at mobile node (6) place for the mobile node (6) that roaming takes place;
Described extending domain management entity (7) is to transmit authentication message and packet, the network equipment on the extended network territory of mobile node (6) for mobile node (6);
Described access-in management entity (3) be have can be in the IP address of internet route, be positioned at the trunking that authenticates and transmit mobile node (6) packet between ground field management entity (1) and the extending domain management entity (7), to mobile node (6) identity;
Described basic network territory is the network at the preceding place of mobile node (6) roaming;
Described extended network territory is the network that mobile node (6) roaming back is arrived.
2. realize the adaptive method of LAN/WAN in the flexible IP network technology system according to claim 1, it is characterized in that: when described mobile node (6) carries out wide area network registration or local area network registration, being provided with marker bit in the registration message indicates, after registration message arrives ground field management entity (1) or extending domain management entity (7), type according to register requirement is handled, and sets up corresponding tunnel; When mobile node (6) carries out the wide area network registration, after the authentication success, need further negotiate FPDP and could set up corresponding data tunnel, roam.
3. realize the adaptive method of LAN/WAN in the flexible IP network technology system according to claim 1 and 2, it is characterized in that: described network address translation is to hide the mode of the connection the Internet of internal network address, when the internal network mobile node (6) that is positioned at NAT server inboard connects the Internet, network address translation becomes an outside public ip address with the internal network IP address transition of mobile node (6), be stored in the address pool of network address translation, when external network data is returned, network address translation then oppositely replaces to destination address the address of initial inside mobile node (6), allows internal network mobile node (6) accept.
4. flexibility according to claim 3 ' realize the adaptive method of LAN/WAN in the network technology system, it is characterized in that: described tunnel be meant when packed packet transmits on public internet network the logical path of process.
Flexibility 5. according to claim 4 ' realize the adaptive method of LAN/WAN in the network technology system, it is characterized in that: described mobile node (6) be can with the position of entering the Internet from a link switchover to another link, and still keep all ongoing communications, and only use the equipment of original fixed ip address.
6. realize the adaptive method of LAN/WAN in the flexible IP network technology system according to claim 5, it is characterized in that: described flexible IP network technology system is meant by ground field management entity (1), extending domain management entity (7), access-in management entity (3) and mobile node (6) and constitutes, make mobile node (6) in the local area network (LAN) can be in the Global Internet scope arbitrarily roaming, and guarantee that mobile node (6) can realize the system of interactive access at any time with its basic network territory.
CNB2004100731681A 2004-09-30 2004-09-30 Method for realizing local network / broad network self adaption in flexible IP network technology system Expired - Fee Related CN1248462C (en)

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