CN101175043B - System and method for supporting IPv6 terminal access to IPv4 core net - Google Patents
System and method for supporting IPv6 terminal access to IPv4 core net Download PDFInfo
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Abstract
The present invention discloses a system for supporting the IPv6 terminal to be accessed into the IPv4 core network; the system comprises an IPv6 terminal, an IPv4 core network and a conversation boundary controller; the system also comprises a network address and a protocol conversion device. The network address and the protocol conversion device are used for converting the IPv6 message emitted by the IPv6 terminal into IPv4 message and transmitting the message to the conversation boundary controller, and converting the IPv4 message emitted by the conversation boundary controller into IPv6 message and transmitting the message to the IPv6 terminal; the conversation boundary controller is used for converting the IPv6 signal information transmitted by a network and protocol converter into IPv4 signal information to emit to the IPv4 core network; and then the controller converts the IPv4 signal information emitted by the IPv4 core network with the destination of the IPv6 terminal into the IPv6 signal information to emit to the network address and protocol converter. In this way, the IPv6 terminal can be supported to be accessed into the IPv4 core network fast.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of system and method for the IPv6 of support terminal access to IPv 4 core net.
Background technology
In next generation network NGN or IP Multimedia System IMS network, Session Border Controller SBC belongs to the access device of terminal access core net between core net and terminal network.In the process of IPv6 network evolution, the IPv6 terminal has appearred at the IPv4 network.These IPv6 terminals have formed the island network of an IPv6, with existing IPv4 terminal and deposit.Core net is because network element is numerous, and existing core net in order to allow the seamless core net that is linked into of IPv6 terminal, need be carried out the IPv6 transformation substantially based on the IPv4 core net to SBC and core net.
Core net supports that IPv6 comprises following components:
The bearer network protocol conversion, the bearing protocol of core net is IPv4 at present, it need be transformed into the bearer network of supporting IPv6;
The signaling protocol conversion is an example with the Session Initiation Protocol, and each core network element need be transformed Session Initiation Protocol, supports IPv6;
The conversion of Media Stream, each media server of SBC and core net all needs to transform as support IPv6.
Core network element is numerous, realize that the IPv6 of numerous network elements transforms more complicated, and the R﹠D cycle is long.Generally, use SBC to do the conversion of IPv6, promptly allow SBC realize the two agreement supports of IPv4/IPv6, between terminal and core net, do conversion to IPv4.
SBC realizes that the IPv6 terminal also has multiple way to the access of IPv4 core net, realizes that on SBC the IPv4/IPv6 dual stack is to realize maximum a kind of ways at present.Because the access of IPv6 terminal relates to the conversion of bearing protocol, signaling protocol, Media Stream, so SBC realization dual stack need be finished the function of following several aspects:
At first, the ICP/IP protocol stack need be realized dual stack, for application layer protocol provides necessary dual stack support;
Secondly, for the medium processing section, part SBC realizes the processing of medium by network processing unit, thereby needs to transform the microcommand that operates on these network processing units;
At last, SBC need transform the existing signalling protocols part, because the IPv6 terminal can have the address information of IPv6 in signaling.
From above-mentioned discussion analysis, on SBC, realize the scheme of IPv4/IPv6 dual stack, relate to many-sided transformations such as signaling, medium, carrying, it is long to implement more complicated, cycle.
Summary of the invention
For addressing the above problem, the invention discloses a kind of system and method for the IPv6 of support terminal access to IPv 4 core net, its purpose is to make existing IPv4 SBC to realize supporting the IPv6 terminal to insert fast.
The invention discloses a kind of system of the IPv6 of support terminal access to IPv 4 core net, comprise IPv6 terminal, IPv4 core net and Session Border Controller, also comprise:
The network address and protocol conversion device, be used for the IPv6 message that described IPv6 terminal sends is converted to the IPv4 message, be transmitted to described Session Border Controller, and the IPv4 message of described Session Border Controller transmission is converted to the IPv6 message, be transmitted to described IPv6 terminal;
Described Session Border Controller, the IPv6 signaling message that is used for described IPv6 terminal that the described network address and protocol conversion device are transmitted is converted to the IPv4 signaling message, send to described IPv4 core net, and be that the IPv4 signaling message of described IPv6 terminal is converted to the IPv6 signaling message with the destination that described IPv4 core net sends, send to the described network address and protocol conversion device.
The described network address and protocol conversion device also comprise the mapping address pond, wherein comprise IPv4 address pool and IPv6 address pool, IPv4 address and IPv6 address are corresponding mutually in the described mapping address pond, the IPv4 address transition that is used for IPv4 message that the described network address and protocol conversion device are received is the IPv6 address, and the IPv6 address transition in the IPv6 message that the described network address and protocol conversion device are received is the IPv4 address.
Described Session Border Controller also is used for creating the endpoint registration context after receiving the registration message that described IPv6 terminal sends, and is the IPv6 terminal with the attribute-bit of described IPv6 terminal therein.
Described Session Border Controller also is used for after receiving the signaling message that comes from or mail to described IPv6 terminal, determines that by searching described IPv6 endpoint registration context the transmission of signaling message or receiving terminal are the IPv6 terminal.
The invention also discloses a kind of method of the IPv6 of support terminal access to IPv 4 core net, comprise the steps:
Step 2, described Session Border Controller receives the IPv6 signaling message of the IPv6 terminal of the described network address and protocol conversion device forwarding, be converted into the IPv4 signaling message, send to the IPv4 core net, perhaps, the destination that receives described IPv4 core net transmission is the IPv4 signaling message of described IPv6 terminal, is converted into the IPv6 signaling message, sends to the described network address and protocol conversion device.
Described step 1 further comprises uses the mapping address pond, wherein comprise IPv4 address pool and IPv6 address pool, IPv4 address and IPv6 address are corresponding mutually in the described mapping address pond, with the IPv4 address transition in the IPv4 message of the described network address and protocol conversion device reception is the IPv6 address, perhaps, be the IPv4 address with the IPv6 address transition in the IPv6 message of the described network address and protocol conversion device reception.
Described step 2 also comprises, described Session Border Controller is created the endpoint registration context after receiving the registration message that described IPv6 terminal sends, and is the IPv6 terminal with the attribute-bit of described IPv6 terminal therein.
Described step 2 comprises that also described Session Border Controller determines that by searching described IPv6 endpoint registration context the transmission of signaling message or receiving terminal are the IPv6 terminal after receiving the signaling message that comes from or mail to described IPv6 terminal.
Beneficial effect of the present invention is, provide an ALG ALG scheme that can realize fast at the IPv6 terminal access to IPv 4 core net, after having introduced the network address and protocol conversion NAT-PT equipment, SBC only needs change seldom just can support that the IPv6 terminal is linked into the IPv4 core net, and do not need to carry out the upgrading of IPv4 and IPv6 node, realize fast interconnecting.
Description of drawings
Fig. 1 is a system configuration schematic diagram of the present invention;
Fig. 2 is the schematic flow sheet of IPv6 endpoint registration to the IPv4 core net;
Fig. 3 is the call flow schematic diagram that the IPv6 terminal is done caller;
Embodiment
Analyze discovery by SBC being realized the problem of dual stack, the difficult point of realization IPv6 terminal access to IPv 4 core net network is to realize two stacks of bearer network protocol conversion and Media Stream on SBC, so the present invention solves the IPv6 of bearer network and Media Stream and the conversion between the IPv4 by introducing NAT-PT equipment.
NAT-PT equipment be data network IPv4 to the IPv6 protocol conversion device, NAT-PT is a kind of pure IPv6 node and the internodal intercommunication mode of IPv4, all comprise that the conversion work of address, agreement all finished by this network equipment.NAT-PT equipment also disposes the mapping address pond, wherein comprises IPv4 address pool and IPv6 address pool, and IPv4 address and IPv6 address are corresponding mutually, in order to when IPv4 and the conversion of IPv6 message, and conversion address wherein.
Support that NAT-PT equipment is between IPv6 terminal and SBC in the system of IPv6 terminal access to IPv 4 core net, SBC is with the IPv4 core net.
SBC is used for the IPv6 signaling message of the IPv6 terminal of the described network address and protocol conversion device forwarding is converted to the IPv4 signaling message, send to described IPv4 core net, and the IPv4 signaling message that the IPv4 core net is sent, this IPv4 signaling message destination is described IPv6 terminal, be converted to the IPv6 signaling message, send to the described network address and protocol conversion device, and after receiving the registration message that the IPv6 terminal sends, create the endpoint registration context, and be the IPv6 terminal with the attribute-bit of described IPv6 terminal therein, after receiving the signaling message that comes from or mail to described IPv6 terminal, determine that by searching described endpoint registration context the receiving terminal of signaling message is the IPv6 terminal.
With session initiation protocol SIP registration process is example, and concrete implementation step is as follows:
Step 2, the IPv6 terminal sends the SIP signaling to SBC, because SBC has done static mappings on NAT-PT equipment, therefore, the signaling of IPv6 terminal at first sends to NAT-PT equipment, NAT-PT equipment is the IPv4 address according to local mapping address pond with IPv6 map addresses in the message, and NAT-PT equipment is bearing bed IPv6 after the conversion of IPv4, and it is transmitted to SBC.
Step 3, SBC receives the signaling that the NAT-PT device forwards is come, the signaling of this forwarding is the IPv4 carrying, SBC analyzes signaling, after carrying out registration action, register command is forwarded to core net, owing to contain IPv6 information in the signaling, thereby before transmitting, signaling is transformed to the IPv4 core net can enough discerns signaling.
Step 4 after SBC receives replying of IPv4 core net, finds terminal in local log-on message, the type of learning terminal is IPv6, and the information of replying in the signaling is revised as IPv6 information, sends signaling message to NAT-PT equipment.
Step 5, NAT-PT equipment receive replying of SBC, are the IPv6 address according to local mapping address pond with IPv4 map addresses in the message, after finishing bearing protocol and being converted to IPv6 by IPv4, message are forwarded to the IPv6 terminal, finish endpoint registration.
In the above-described embodiment, SBC does not realize IPv4/IPv6 dual stack, is pure IPv4 equipment, and introducing NAT-PT equipment carries out the protocol conversion between IPv4 and IPv6, and SBC realizes that to doing change on the Session Initiation Protocol IPv6 terminal is linked into the IPv4 core net.
SBC uses the ALG function, and the SIP signaling of IPv6 terminal and the IPv6 information among the media description SDP have been shielded fully, makes the registration and the call business of the processing terminal that existing IPv4 core net can be correct.
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 1 is the IPV6 terminal is linked into core net by NAT-PT a structure chart.The IPV6 terminal is linked in the IPv4 core net by the NAT-PT equipment that can carry out IPv6 and IPv4 bi-directional conversion.Wherein, NAT-PT equipment connects IPv6 terminal and SBC, and SBC connects NAT-PT equipment and IPv4 core net.
The embodiment of IPv6 endpoint registration IPv4 core net as shown in Figure 2, may further comprise the steps:
Step S201, IPv6 sends register requirement, through the IPv6 bearer network, arrives NAT-PT equipment;
Step S202, NAT-PT equipment is the IPv4 address according to local mapping address pond with the IPv6 map addresses, finishes the IPv6 message after the conversion of IPv4 message, transmits the IPv4 message to SBC;
Step S203, after SBC receives the register requirement of NAT-PT device forwards, create the endpoint registration context, corresponding attribute-bit with described IPv6 terminal in the registration context is the IPv6 terminal, the conversion log-on message, remove the IPv6 information in the registration message, then the register requirement after the conversion is forwarded to the IPv4 core net;
Step S204, the IPv4 core net is received the register requirement that SBC sends, and replys registration reply without permission, requires terminal authentication;
Step S205, SBC search the terminal context in SBC this locality after receiving the registration reply without permission of IPv4 core net answer, learn that terminal is the IPv6 terminal, and processing messages is recovered the IPv6 information in the register requirement, sends a message to NAT-PT equipment;
Step S206, NAT-PT equipment are the IPv6 address according to local mapping address pond with the IPv4 map addresses after receiving the message of SBC transmission, finish the IPv4 message after the conversion of IPv6 message, and the IPv6 message after the transmission conversion is to the IPv6 terminal;
Step 207 repeats above-mentioned IP v4 to IPv6 conversion and signaling conversion process to step 212, finally finishes endpoint registration.
The IPv6 terminal as shown in Figure 3, may further comprise the steps as a call flow embodiment of main frame:
Step S301, the IPv6 terminal sends call request, arrives NAT-PT equipment through the IPv6 bearer network;
Step S302, NAT-PT equipment is the IPv4 address according to local mapping address pond with the IPv6 map addresses, finishes the conversion of IPv6 message to the IPv4 message, then the IPv4 message is sent to SBC;
Step S303, SBC is according to call request, search the endpoint registration context, find that terminal is the IPv6 type, register requirement is carried out conversion, adopt back-to-back user agent B2B UA mode, the information in the call request is all noted, simultaneously core net is generated the call request of all-IP v4 information, then call request is sent to the IPv4 core net;
Step S304, after the IPv4 core net was received call request, the answering call successful respond was to SBC;
Step S305, after SBC receives that access success is replied, match call context, find the endpoint registration context simultaneously, find that terminal is the IPv6 type, do the signaling conversion, in access success is replied, recover the IPv6 information in the call request, then this access success is replied the NAT-PT equipment that sends to;
Step S306 after NAT-PT equipment receives the message of SBC, is the IPv6 address according to local mapping address pond with the IPv4 map addresses, finishes the IPv4 message after the conversion of IPv6 message, transmits the IPv6 message to the IPv6 terminal;
Step S307 after the IPv6 terminal receives that access success is replied, sends a confirmation message to NAT-PT equipment;
Step S308 after NAT-PT equipment receives the message of IPv6 terminal, is the IPv4 address according to local mapping address pond with the IPv6 map addresses, finishes the IPv6 message after the conversion of IPv4 message, transmits the IPv4 message and gives SBC;
After step S309, SBC receive the affirmation message of NAT-PT device forwards, find call context and endpoint registration context, after learning that terminal is the type of IPv6, do B2B UA conversion, convert acknowledge message to only comprise IPv4 information signaling, send it to the IPv4 core net;
So far, call setup success;
The IPv6 media message that the IPv6 terminal is sent arrives NAT-PT equipment by the IPv6 bearer network, NAT-PT equipment converts thereof into the IPv4 message, be transmitted to SBC, SBC is forwarded to called again, and Media layer is realized by NAT-PT equipment with the conversion between the IPv4 fully by IPv6.
Step S310, the IPv6 terminal sends IPv6 on-hook request message, arrives NAT-PT equipment by the IPv6 bearer network;
Step S311, NAT-PT equipment is the IPv4 address according to local mapping address pond with the IPv6 map addresses, finishes the IPv6 message after the conversion of IPv4 message, and message is transmitted to SBC;
Step S312, SBC find call context and endpoint registration context after receiving NAT-PT device forwards on-hook request message, after learning that terminal is the type of IPv6, do B2B UA conversion, convert the on-hook request message to only comprise IPv4 information signaling, send it to the IPv4 core net;
Step S313, the IPv4 core net is replied the on-hook successful respond;
After step 314:SBC receives the on-hook successful respond of core net, match call context, find the endpoint registration context simultaneously, after finding that terminal is the IPv6 type, in the on-hook successful respond, recover the IPv6 information in the former call request, then the on-hook successful respond is sent to NAT-PT equipment, simultaneously call release;
Step S315, NAT-PT equipment are the IPv6 address according to local mapping address pond with the IPv4 map addresses after receiving the message of SBC transmission, finish the IPv4 message after the conversion of IPv6 message, E-Packet to the IPv6 terminal;
So far, calling is hung up.
Claims (8)
1. a system that supports the IPv6 terminal access to IPv 4 core net comprises IPv6 terminal, IPv4 core net and Session Border Controller, it is characterized in that, also comprises:
The network address and protocol conversion device, be used for the IPv6 message that described IPv6 terminal sends is converted to the IPv4 message, be transmitted to described Session Border Controller, and the IPv4 message of described Session Border Controller transmission is converted to the IPv6 message, be transmitted to described IPv6 terminal;
Described Session Border Controller, the IPv6 signaling message that is used for described IPv6 terminal that the described network address and protocol conversion device are transmitted is converted to the IPv4 signaling message, send to described IPv4 core net, and be that the IPv4 signaling message of described IPv6 terminal is converted to the IPv6 signaling message with the destination that described IPv4 core net sends, send to the described network address and protocol conversion device.
2. the system of support IPv6 terminal access to IPv 4 core net as claimed in claim 1, it is characterized in that, the described network address and protocol conversion device also comprise the mapping address pond, wherein comprise IPv4 address pool and IPv6 address pool, IPv4 address and IPv6 address are corresponding mutually in the described mapping address pond, the IPv4 address transition that is used for IPv4 message that the described network address and protocol conversion device are received is the IPv6 address, and the IPv6 address transition in the IPv6 message that the described network address and protocol conversion device are received is the IPv4 address.
3. the system of support IPv6 terminal access to IPv 4 core net as claimed in claim 1, it is characterized in that, described Session Border Controller also is used for after receiving the registration message that described IPv6 terminal sends, create the endpoint registration context, and be the IPv6 terminal with the attribute-bit of described IPv6 terminal therein.
4. the system of support IPv6 terminal access to IPv 4 core net as claimed in claim 3, it is characterized in that, described Session Border Controller also is used for after receiving the signaling message that comes from or mail to described IPv6 terminal, determines that by searching described IPv6 endpoint registration context the transmission of signaling message or receiving terminal are the IPv6 terminal.
5. a method of supporting the IPv6 terminal access to IPv 4 core net is characterized in that, comprises the steps:
Step 1, the network address and protocol conversion device receive the IPv6 message that the IPv6 terminal sends, and are converted into the IPv4 message, be transmitted to Session Border Controller, perhaps, receive the IPv4 message that described Session Border Controller sends, be converted into the IPv6 message, be transmitted to described IPv6 terminal;
Step 2, described Session Border Controller receives the IPv6 signaling message of the IPv6 terminal of the described network address and protocol conversion device forwarding, be converted into the IPv4 signaling message, send to the IPv4 core net, perhaps, the destination that receives described IPv4 core net transmission is the IPv4 signaling message of described IPv6 terminal, is converted into the IPv6 signaling message, sends to the described network address and protocol conversion device.
6. the method for support IPv6 terminal access to IPv 4 core net as claimed in claim 5, it is characterized in that, described step 1 further comprises uses the mapping address pond, wherein comprise IPv4 address pool and IPv6 address pool, IPv4 address and IPv6 address are corresponding mutually in the described mapping address pond, with the IPv4 address transition in the IPv4 message of the described network address and protocol conversion device reception is the IPv6 address, perhaps, be the IPv4 address with the IPv6 address transition in the IPv6 message of the described network address and protocol conversion device reception.
7. the method for support IPv6 terminal access to IPv 4 core net as claimed in claim 5, it is characterized in that, described step 2 also comprises, after described Session Border Controller receives the registration message of described IPv6 terminal transmission, create the endpoint registration context, and be the IPv6 terminal with the attribute-bit of described IPv6 terminal therein.
8. the method for support IPv6 terminal access to IPv 4 core net as claimed in claim 7, it is characterized in that, described step 2 also comprises, described Session Border Controller determines that by searching described IPv6 endpoint registration context the transmission of signaling message or receiving terminal are the IPv6 terminal after receiving the signaling message that comes from or mail to described IPv6 terminal.
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| CN2007101778602A CN101175043B (en) | 2007-11-21 | 2007-11-21 | System and method for supporting IPv6 terminal access to IPv4 core net |
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| CN2007101778602A CN101175043B (en) | 2007-11-21 | 2007-11-21 | System and method for supporting IPv6 terminal access to IPv4 core net |
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| CN101175043B true CN101175043B (en) | 2011-04-20 |
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| CN102843439B (en) * | 2011-06-23 | 2017-11-10 | 中兴通讯股份有限公司 | Equipment communication method and device |
| CN103067414A (en) * | 2013-01-30 | 2013-04-24 | 北京天地互连信息技术有限公司 | Method for solving mutual communication of transitioning IPv4 (Internet Protocol version 4) to IPv6 (Internet Protocol version 6) in IMS (IP Multimedia Subsystem) |
| CN103684968B (en) * | 2014-01-03 | 2017-04-12 | 中国联合网络通信集团有限公司 | Access network deployment method, terminal equipment, network core equipment and system |
| CN113438220B (en) * | 2021-06-22 | 2024-03-15 | 上海翰声信息技术有限公司 | Method for converting IP address in soft switching communication system and soft switching communication system |
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| CN1949776A (en) * | 2006-11-10 | 2007-04-18 | 清华大学 | 4 over 6 tunnel packing and depacking method for extending boundary gateway protocol |
| CN1972295A (en) * | 2006-12-01 | 2007-05-30 | 清华大学 | IPv4 over IPv6 extension method of BGP protocol software |
| CN1988510A (en) * | 2006-12-28 | 2007-06-27 | 北京交通大学 | IPv4/IPv6 double stack IP-DSLAM system and realizing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949776A (en) * | 2006-11-10 | 2007-04-18 | 清华大学 | 4 over 6 tunnel packing and depacking method for extending boundary gateway protocol |
| CN1972295A (en) * | 2006-12-01 | 2007-05-30 | 清华大学 | IPv4 over IPv6 extension method of BGP protocol software |
| CN1988510A (en) * | 2006-12-28 | 2007-06-27 | 北京交通大学 | IPv4/IPv6 double stack IP-DSLAM system and realizing method |
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