CN100379219C - Method for realizing IP network terminal communication by NAT-PT and customer/servo mode - Google Patents
Method for realizing IP network terminal communication by NAT-PT and customer/servo mode Download PDFInfo
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Abstract
The present invention relates to the technical field of communication. The present invention uses combination of NAT-PT and a client/server pattern to realize a world roaming communication method of an IP network terminal in an end-to-end mode. The present invention uses the mutual communication of an IPv4 network and an IPv6 network, which is realized by an NAT-PT conversion gateway, to set a reverter server in the IPv6 network positioned behind NAT-PT. The server is connected with an IPv6/IPv4 dual-stack host computer provided with client software through a tunnel, which leads the IPv6/IPv4 dual-stack host computer positioned in any IPv4 network to penetrate through any IPv4 network through the tunnel to be connected with any other IPv6 or a host computer which has an integral IPv4 address in an end-to-end equity communication mode. The method can be compatible to the existing network system. The existing routing device does not need to be upgraded.
Description
Technical field
The present invention relates to communication technical field; Particularly a kind of NAT-PT of utilization (Network addresstranslation-protocol transform: Network address translators and protocol conversion) and Client/Server are united the method that realizes IP (Internrnet Protocol) network terminal global roaming, utilize Client/Server to unite end-to-end (the Peer to Peer) that realize between terminal communicate by letter method with global roaming between especially a kind of IPv4/IPv6 of utilization (Internet Protocol Version 4/Internet Protocol Version 6) NAT-PT transfer gateway and IPv6 terminal and attribution server thereof.
Background technology
The customized information communication service that people-oriented is one of ultimate aim of development communication technologies.A basis of realizing this target is end-to-end (Peer toPeer) peer-to-peer communications that must at first realize between user terminal.Existing the Internet based on IPv4 is because the restriction of its address space has made it can't be competent at this work.So people have proposed this new technology of IPv6.IPv6 is not very extensive from proposing the existing time about ten years till now though use, and it is technical to be mature on the whole, and has only it can satisfy the telex network personalization at present, realizes end-to-end peer-to-peer communications, realizes global arbitrfary point roaming etc.Till now, progressively to replace IP4 and become the core of Future Internet be a kind of irreversible trend to Pv6.In this process, because IPv4 is global at present maximum the Internet, its user has several hundred million, the user so relies on Internet at present, so that be impatient at any break period that Internet occurs when IPv6 moves, so the IPv6 network will have the coexistence of a very long time with the IPv4 network from IPv4.How to realize that user terminal can conduct interviews to the IPv4 network, can directly be connected to the IPv6 network again and be implemented in each IPv4 network and the internetwork global roaming of IP6, how realize in this hybrid network that end-to-end peer-to-peer communications etc. is the key that promotes the IPv6 development.
For top problem, be the problem that solves the IPv4 address shortage because people at first expect in early time.Propose and used the method for home address, utilize proxy gateway to realize other user's communications on the terminal of Intranet and the fhe global the Internet.Here proxy gateway has played Network address translators (NAT:Network address translation) function, and this function makes the user can preserve the IPv4 address.NAT replaces with the address of NAT router with the TCP/IP address of LAN system, and it is seemed just as the system that has only a connection.Although NAT saves the space, it also can make troubles.When using NAT, external user " sees " that with whole subnet doing is a computer, and this can cause unavoidable problem.For example, when every Web server all needed the IP address of oneself, NAT can't provide many Web servers at the three unities.Multimedia and interactive Internet are professional to be difficult to (sometimes can not) is undertaken by the NAT router.And can not set up a plurality of sub-networks with NAT device is nested.The trouble that another one is bigger is the requirement that is difficult to realize the end-to-end peer-to-peer communications of people's personalization.The enforcement of this technology to the difficulty that the popularization of present IPv6 causes is: aggravated to be positioned at face-to-face difficulty of communicating by letter between IPv4 terminal and the IPv6 network terminal after the NAT.Most of technology of people's proposition at present just solve IPv4 network and the internetwork intercommunication of IPv6, and do not solve the face-to-face of terminal room, just the problem of end-to-end peer-to-peer communications; Say nothing of the end-to-end peer-to-peer communications under the global roaming situation.
Summary of the invention
A free-revving engine of the present invention provides a kind of IPv4/IPv6 of utilization network interworking transfer gateway NAT-PT and the attribution server that is arranged in the IPv6 network, make the two stack main frames of the IPv6/IPv4 that is positioned at IPv4 NAT back, dynamically obtain the IPv6 address by NAT-PT and attribution server, thereby realize and IPv6 network terminal user and the end-to-end peer-to-peer communications of terminal use with global I Pv4 address.
Another object of the present invention provides a kind of existing inner IPv4 address network of using that penetrates, realize the method for end-to-end peer-to-peer communications, even user terminal does not possess under the situation of global I Pv4 address in this method, also can utilize attribution server to realize the end-to-end peer-to-peer communications of global range.This makes and need not the present invention and existing network system compatibility existing routing device is upgraded.
Another object of the present invention is to combine with the existing communication network technology, in the global roaming that does not need the existing communication net is done to realize under the situation of any change user terminal.
Specific implementation process of the present invention is as follows:
Utilize NAT-PT and Client to unite the end-to-end communication method that realizes the IP network terminal, by utilizing interconnecting of IPv4 network that the NAT-PT transfer gateway realized and IPv6 network, (network one side is provided with the client attribution server at the IPv6 of transfer gateway, this server be responsible for setting up with the two stack host terminals of its service-user IPv6/IPv4 of institute between the tunnel be connected, on user's IPv4/IPv6 dual stack host terminal, install and to initiate the client-side program that the IPv6 tunnel connects the request of foundation to attribution server, carrying out IPv6 when user's request communicates by letter into, the user start this client-side program set up with attribution server between the IPv6 tunnel be connected, user terminal utilizes this tunnel to realize and other IPv6 network users' end-to-end communication that the specific implementation step is as follows:
1) at the IPv6 of NAT-PT transfer gateway network side a User IP v6 communication customer end attribution server is installed, realization is installed on this server sets up the server that the IPv6 tunnel is connected with the client in the IPv4 network, this server major function is that the IPv6 tunnel that customer in response end program is initiated connects the request of foundation, carry out the IPv6 address assignment, foundation and maintenance are connected with the IPv6 tunnel of client communication, and be responsible for to transmit the datagram of communicating by letter between client and other IPv6 user terminal, selecteed server will be as the attribution server of user terminal;
2) user terminal is configured to support the main frame of IPv4/IPv6 dual stack communication and client-side program from the connection foundation request of IPv6 tunnel to attribution server that can initiate is installed;
3) after the user starts client-side program, user terminal will initiatively initiate to connect the request of foundation to attribution server, attribution server will be verified user's legitimacy, after checking, to send to this requesting terminal and agree to set up the response that the tunnel connects, and whether have the IPv6 address according to the terminal of request and determine whether distributing a globally unique IPv6 address to give this terminal, if terminal itself has the IPv6 address, the tunnel that server just can directly utilize this address to set up and pass NAT-PT connects, otherwise need to distribute an IPv6 address to give this terminal, be connected with the tunnel of terminal room by the foundation of NAT-PT gateway again;
4) pass after NAT-PT gateway and service set up the IPv6 tunnel and be connected when terminal, just can be by the end-to-end communication between attribution server realization and other IPv6 user, as long as this install corresponding client-side program in client, when the user wants to realize end-to-end communication, it just can start client-side program, afterwards, the packet that the user is mail to the IPv6 terminal or had a global I Pv4 End of Address will be at first will send to attribution server by the tunnel of setting up, by attribution server packet is handed to the final purpose address, otherwise, want other terminal with this client communication, the packet that it sends also can normally be routed to attribution server, is forwarded to client by attribution server again.
In the above-mentioned communication process, home agent is to set up based on the IPv6 tunnel on the IPv4 network to connect for the effect of its client, for thinking and other terminal of client communication that it plays the effect of the last-hop Router of client.
When the IP terminal that user terminal and other have a peer-to-peer communications ability is carried out peer-to-peer communications, can use the IPv6 data encapsulation in IPv4 grouping bag, to transmit, also can utilize this Tunnel Identifier to replace the IPv6 address, to increase the payload of grouping, if the Tunnel Identifier that uses comes mark packets institute through tunnel and client ip v6 address, that needs to set up special " Tunnel Identifier, address " conversion table in attribution server, with the IPv6 address of realization client terminal and the mutual conversion between Tunnel Identifier, communicate by its home agent then.
User terminal can join the Internet in any way, office can be closed in the IPv4 address that is obtained, it also can be home address, and be not subject to any specific I SP, unique what will do is that it need be bought client-side program and installs, and the user just can realize peer-to-peer communications end to end under the situation of global roaming afterwards.
Description of drawings
Fig. 1 is a user configured pair of stack main frame usual manner visit IPv4/IPv6 network diagram;
Fig. 2 is the access mode figures of two stack main frames in pure IPv6 network the time;
Fig. 3 is the communication process figure between client and attribution server;
Fig. 4 is the communication process figure of client by attribution server and other global I P terminal room;
Fig. 5 is that client is by the packet encapsulation figure in the communication process of attribution server and other global I P terminal room;
1) user terminal itself is configured to support the main frame of IPv4/IPv6 dual stack communication.So as shown in Figure 1, when the user only wants to obtain the information that internet network provides, if user terminal is arranged in the IPv4 network, connect after it can select an ISP (Internet ServiceProvider) by dialing online, GPRS or other configuration mode acquisition IPv4 address arbitrarily and surf the Internet, this address can be a home address, also can be global I Pv4 address.
2) when the user is arranged in the IPv6 network, he can select any IPv6 ISP, and obtains automatically to communicate behind the global I Pv6 address that this ISP provides, as shown in Figure 2.
3) client-side program of realizing end-to-end peer-to-peer communications is being installed on the user terminal: the function of this program is after the user starts it, it can be realized and being connected of remote server automatically, and to server application IPv6 address, after obtaining the IPv6 address, the IPv6 tunnel communication of being responsible for setting up on the IPv4 with server is connected.Select a station server (as DNS name server, www server, NAT-PT gateway etc.) that the server of realizing end-to-end peer-to-peer communications is installed in the IPv6 network: the server major function is the IPv6 application IP addresses that customer in response end program is initiated, distribute to client ip v6 address, safeguard the IPv6 address pool, foundation and maintenance are connected with the IPv6 tunnel of client communication, and the datagram of communicating by letter between responsible transfer client and other communication node.Selecteed server will be as the attribution server of user terminal, and attribution server is responsible for transmitting the client data bag to other terminal, also is responsible for the packet of other terminal is forwarded to client.Communication process between client and attribution server is as shown in Figure 3:
After → user starts client-side program, user terminal will initiatively initiate to connect the request of foundation to attribution server; Middle will pass the NAT-PT that connects IPv4 network and IPv6 network, the Pv6 address, attribution server address in the client can be disposed automatically by client-side program, also can manual configuration;
→ attribution server will after checking, will distribute globally unique IPv6 address to this requesting terminal to the row checking of user's legitimacy ground, and by the NAT-PT gateway address allocation information be sent to and to have only inner IPv4 address user terminal;
The IPv6 address of giving it that → user terminal distributes by attribution server set up with its IPv6 attribution server between the tunnel based on the IPv4 network be connected, and be that this tunnel distributing identifies by attribution server;
When the IP terminal that → later user terminal and other have a peer-to-peer communications ability is carried out peer-to-peer communications, can use the IPv6 data encapsulation in IPv4 grouping bag, to transmit, also can utilize this Tunnel Identifier to replace the IPv6 address,, be undertaken by its home agent then to increase the payload of grouping.Its process as shown in Figure 4;
In → above-mentioned the communication process, home agent is to set up based on the tunnel on the IPv4 network for the effect of its client, for thinking and other terminal of client communication that it plays the effect of the last-hop router of client.
4) realize above-mentioned peer-to-peer communications end to end, need wrap in data and carry out tunnel encapsulation between terminal and attribution server, simultaneously if the Tunnel Identifier that uses comes mark packets institute through tunnel and client ip v6 address, that needs to set up special " Tunnel Identifier, address " conversion table in attribution server, with the IPv6 address of realization client terminal and the mutual conversion between Tunnel Identifier, packet in client as shown in Figure 5 to the packaged type of another communication terminal, the communication process when Fig. 5 has provided client and is positioned at the privately owned address field of inner IPv4; If terminal has formal IPv4 location, that family is just by normal mode communication, and needn't start client-side program and attribution server connects.
5) after above-mentioned configuration was finished, as long as install corresponding client-side program in client, when the user wanted to realize end-to-end communication, it just can start client-side program.Afterwards, the user mail to the IPv6 terminal or have the packet of global I Pv4 End of Address will be at first with sending to attribution server by the tunnel of setting up, by attribution server packet will be handed to the final purpose address.Otherwise, think and other terminal of this client communication that the packet that it sends also can normally be routed to attribution server, is forwarded to client by attribution server again.
6) in the above-mentioned implementation procedure, user terminal can join the Internet in any way, and office can be closed in the IPv4 address that is obtained, and can be home address also, and not be subject to any specific I SP.It is unique that what will do is that it need be bought client-side program and installs.The user just can realize peer-to-peer communications end to end under the situation of global roaming afterwards.
Utilize NAT-PT (Network address translation-protocol transform: Network address translators and protocol conversion) and customer service/server mode to unite the method that realizes end-to-end communication (Peer to Peer) on IP (Internet Protocol) network terminal arbitrfary point, it mainly is the pre-designed IPv6 terminal attaching server program that places the client-side program of terminal and place IPv6 (Internet Protocol Version 6) network, terminal is in the IPv4 network time, it can be routinely way access IPv4 network, terminal roaming is in the IPv6 network time, and it also can realize the visit to the IPv6 network by the mode of normal pure IPv6 access to netwoks.Have only after terminal roaming is in the IPv4 network, if terminal want to realize with the IPv6 network user between end-to-end (Peer to Peer) communicate by letter, terminal will start client-side program so, the attribution server of the IPv6 network after trend is arranged in NAT-PT is initiated application IP addresses, attribution server is terminal distribution global I Pv6 address, and the tunnel of setting up from the server that is arranged in the IPv6 network to terminal room by NAT-PT connects, all IPv6 data that mail to this portable terminal will mail to the attribution server of this terminal earlier, by attribution server data are encapsulated again and by the NAT-PT gateway forwards to portable terminal; This terminal in the IPv4 network passes another terminal in the IPv6 network if any data, also need data are forwarded to earlier on its attribution server, transmit by attribution server, thereby realize terminal global roaming and with the end-to-end communication of the pure IPv6 network terminal, here the most important thing is this method can with existing network system compatibility, need not existing routing device is upgraded, we do not need existing IPv4 network is made any change in other words, adopt the terminal of this method just can realize global roaming and adopt the terminal of this method with other, and pure IPv6 network user terminals realizes communication end to end.
Claims (3)
1. utilize NAT-PT and Client to unite the communication means of realizing the IP network terminal, it is characterized in that, by utilizing interconnecting of IPv4 network that the NAT-PT transfer gateway realized and IPv6 network, in the IPv6 of transfer gateway network one side the client attribution server is set, this server be responsible for setting up with the two stack host terminals of its service-user IPv6/IPv4 of institute between the tunnel be connected, on user's IPv4/IPv6 dual stack host terminal, initiate the IPv6 tunnel and connect the request of foundation to attribution server, when IPv6 communication is carried out in user's request, the user set up with attribution server between the IPv6 tunnel be connected, user terminal utilizes this tunnel to realize and other IPv6 network users' end-to-end communication that the specific implementation step is as follows:
1) at the IPv6 of NAT-PT transfer gateway network side a User IP v6 communication clients is installed
The end attribution server, on this server, realize with the IPv4 network in client set up the IPv6 tunnel and be connected, carry out the IPv6 address assignment, foundation and maintenance are connected with the IPv6 tunnel of client communication, and be responsible for to transmit the data of communicating by letter between client and other IPv6 user terminal;
2) user terminal is configured to support the main frame of IPv4/IPv6 dual stack communication and initiate the connection of IPv6 tunnel to attribution server and set up request;
3) attribution server is verified user's legitimacy, after checking, send for this requesting terminal and agree to set up the response that the tunnel connects, and whether have the IPv6 address according to the terminal of request and determine whether distributing an IPv6 address to give this terminal, if terminal itself has the IPv6 address, server just directly utilizes this address foundation to pass the tunnel connection of NAT-PT, otherwise needs to distribute an IPv6 address to give this terminal, passes through the foundation of NAT-PT gateway again and is connected with the tunnel of terminal room;
4) pass after NAT-PT gateway and service set up the IPv6 tunnel and be connected when terminal, just by the end-to-end communication between attribution server realization and other IPv6 user, the packet that the user is mail to the IPv6 terminal or had a global I Pv4 End of Address at first will send to attribution server by the tunnel of setting up, by attribution server packet is handed to the final purpose address, the packet that sends with other terminal of this client communication also normally is routed to attribution server, is forwarded to client by attribution server again.
2. NAT-PT of utilization according to claim 1 and Client are united the communication means of realizing the IP network terminal, it is characterized in that, in the above-mentioned communication process, home agent is to set up based on the IPv6 tunnel on the IPv4 network to connect for the effect of its client, to playing the effect of the last-hop Router of client with other terminal of client communication.
3. NAT-PT of utilization according to claim 1 and Client are united the communication means of realizing the IP network terminal, it is characterized in that, when the IP terminal that user terminal and other have a peer-to-peer communications ability is carried out peer-to-peer communications, use the IPv6 data encapsulation in IPv4 grouping bag, to transmit, or utilize this Tunnel Identifier to replace the IPv6 address, to increase the payload of grouping, this user terminal comes mark packets institute through tunnel and client ip v6 address with Tunnel Identifier, and in attribution server, set up special " Tunnel Identifier; address " conversion table, realize the IPv6 address of client terminal and the mutual conversion between Tunnel Identifier, communicate by its home agent then.
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Families Citing this family (13)
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| CN100459566C (en) * | 2004-05-10 | 2009-02-04 | 华为技术有限公司 | Method for implementing tunnel relay in network for carrying out conversion of network address |
| US7443880B2 (en) * | 2004-06-25 | 2008-10-28 | Cisco Technology, Inc. | Arrangement for reaching IPv4 public network nodes by a node in a IPv4 private network via an IPv6 access network |
| GB2416958A (en) * | 2004-07-30 | 2006-02-08 | Orange Personal Comm Serv Ltd | Communicating internet packet data over a packet radio network |
| CN1302651C (en) * | 2004-11-10 | 2007-02-28 | 华为技术有限公司 | A service universal block radio business supporting internodel communication method |
| CN100454891C (en) * | 2005-02-02 | 2009-01-21 | 横河电机株式会社 | IPv6/IPv4 converter |
| CN100362829C (en) * | 2005-02-24 | 2008-01-16 | 华为技术有限公司 | Method and apparatus of IPv6 and IPv4 GPRS core net interconnecting |
| CN100387019C (en) * | 2005-04-04 | 2008-05-07 | 华为技术有限公司 | Method for realizing cross-mixed network multi-protocol tag exchange virtual special network |
| CN100413289C (en) * | 2005-11-25 | 2008-08-20 | 清华大学 | Method for realizing IPv6 high performance interconnection based on P2P on IPv4 |
| CN101115022B (en) * | 2006-07-28 | 2010-05-12 | 华为技术有限公司 | Apparatus and method for implementing node to roaming in IPv6 network |
| CN101707573B (en) * | 2009-09-29 | 2013-04-10 | 北京网能经纬科技有限公司 | Transitional system architecture for realizing intercommunication of ipv4 network and ipv6 network |
| CN102104524B (en) * | 2009-12-21 | 2015-05-20 | 中兴通讯股份有限公司 | Method and system for managing key value of general routing encapsulation tunnel |
| CN102801692B (en) * | 2011-05-26 | 2016-05-18 | 中国科学院声学研究所 | A kind of transmission control protocol optimization method and system connecting based on division |
| CN109067933B (en) * | 2018-07-25 | 2021-12-24 | 赛尔网络有限公司 | Tunnel-based IPv4 and IPv6 network communication system and method |
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