CN1787517B - Network system using IPv4/IPv6 decoder - Google Patents
Network system using IPv4/IPv6 decoder Download PDFInfo
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Abstract
This invention relates to a network system using IPv4/IPv6 decoder, which carries out two-way decode of data packets between IPv6 and IPv4 protocols and is attached with an address table for storing a pair of attribute address and a transfer address and as the corresponding nodes of the MIPv6 mobile nodes after the mobile nodes pan out of the attribute connection, besides, the IPv4/IPv6 decoder is mounted with a data packet process part for processing received data packets from MIPv6 mobile nodes and communicating with them based on the route optimized paths got from the data packet process result, if the node of the MIPv6 contains an expansion header, the process part of the decoder processes it.
Description
Technical field
The present invention relates to a kind of to using the IPv4/IPv6 decoder using IPv6 (InternetProtocol version6, IPv6) as the IPv6 terminal of communication protocol with use the network system of IPv4 (Internet Protocol version4, Internet Protocol Version 4) as the improved use IPv4/IPv6 decoder of the network system of carrying out address transition between the IPv4 of communication protocol.
Background technology
Disclose a kind of technology in the patent documentation 1 that below will mention, attempted in the simultaneous environment of a plurality of IP network that uses the different IP protocol version, to make mobile IPv 4/IPv6 communication to become possibility.
But patent documentation 1 only relates to when an IPv6 node that belongs to an IPv6 network is roamed out an IPv4 network this IPv6 node is notified mechanism from the current location of this node a to home agent (home agent).
With Comparatively speaking above-mentioned, the present invention relates to a kind of when the IPv6 node by ownership connect (homelink) roam into one outside when connecting (external link) this IPv6 node notify the mechanism of the IPv4/IPv6 decoder of this node Care-of Address.So the difference of the invention of the present invention and patent documentation 1 is this IPv6 node and does not roam into the IPv4 network.
Patent documentation 1:
Japanese Laid-Open Patent Application 2002-328869
Fig. 1 is to use the block diagram of the network system of existing IPv4/IPv6 decoder.
Among Fig. 1,30 pairs in IPv4/IPv6 decoder belongs to IPv6 network 10 and IPv6 node 11 and belongs to the packet (packet) that the communication between the IPv4 node of IPv4 network 21 carries out between IPv6 and the IPv4 agreement and carries out intertranslation, can communicate thereby make between the node of different agreement.
On the other hand, proposed mobile IP v 6 (being designated hereinafter simply as MIPv6) is used for mobile node as the IPv6 agreement of another enhancement function.This MIPv6 can make a mobile node roam between the IPv6 network by using a permanent IP address (home address), keeps ongoing simultaneously and communicates to connect.When utilizing a routing optimality function from outside a connection and a destination communication node (corres pondent node) when communicating, this mobile node sends a HoTI (Home Test Init:home test initialization) packet and a CoTI (Care-of Test Init:care-of test initialization) packet to this to communication point.
Fig. 2 is the system works block diagram of communication node 50 when not having the routing optimality function.CoTI (1) or HoTI (2) that communication node 50 responses are sent by mobile node 42 beam back ICMP (Internet ControlManagement Protocol, internet control and management agreement) misdata bag (3) and (4).Mobile node 43 stops to send once more HoTI (1) and CoTI (1) packet after receiving ICMP misdata bag immediately, and does not carry out any routing optimality program.See also shown in Figure 3ly, in this, mobile node 42 utilizes a two-way channel (bidirectional tunnel) to communicate by home agent 41 and communication node 50.
Fig. 4 is the system works block diagram when communication node 50 has the routing optimality function.If communication node 50 has the routing optimality function, this node returns a HoT (4) packet (Home Tes t:home test) and a CoT (3) packet (Care-of Test:care-oftest) that is sent by mobile node 42 respectively.Mobile node stops to send once more HoTI (2) and CoTI (1) packet immediately after receiving these packets, and carries out Location Registration program as shown in Figure 5, so that carry out the routing optimality program.See also shown in Figure 6, when mobile node 42 sends a Binding Update (bindingupdate to communication node 50, BU) this Location Registration program of packet and this communication node are sent a binding where necessary back to and are replied (binding acknowledgement, BA) packet.As shown in Figure 6, later mobile node 42 just can be directly and communication node 50 communicate, and need not carry out Route Selection by home agent 41.
When mobile node 42 by as shown in Figure 7 carry out the routing optimality programs with communicating by letter of IPv4 node 21 by IPv4/IPv6 decoder 30 time, IPv4/IPv6 decoder 30 receives from the HoTI packet of the form as shown in Figure 8 of mobile node 42 and CoTI packet as shown in Figure 9.
HoTI packet shown in Fig. 8 moves header by an ipv6 header (header) and and forms.The source address of ipv6 header represents that a home address and destination address represent and corresponding virtual IPv6 address, IPv4 address.The type of mobile header is HoTI.
CoTI packet shown in Fig. 9 also moves header by an ipv6 header and and forms.The source address table of ipv6 header is shown in the Care-of Address that the mobile moment of mobile node generates, and destination address is represented and corresponding virtual IPv6 address, IPv4 address.The type of mobile header is CoTI.
In MIPv6, mobile header is defined as an IPv6 extension header (extension header).In addition, according to existing NAT-PT standard, use the IPv4/IPv6 decoder of this standard that the IPv6 extension header is ignored.Therefore, existing IPv4/IPv6 decoder 30 can not stop HoTI and CoTI packet to be sent (seeing also shown in Figure 7) once more by mobile node 42.It also is impossible using the optimization Route Selection to communicate between mobile node 42 and IPv4/IPv6 decoder 30.Therefore, see also shown in Figure 10ly, always be to use two to communicate by home agent 41 to channel.
That is to say,, but can not stop mobile node 42 to send HoTI and CoTI at that time once more although when mobile node 42 is carried out the communication that connects from the outside, under usual conditions, carry out the routing optimization program in the existing systems configuration.The problem of Chan Shenging is the load capacity increase on the mobile node 42 like this.
In addition, mobile node 42 can not use the optimization Route Selection of guiding IPv4/IPv6 decoder 30 into.Another problem that causes like this is that the traffic carrying capacity to IPv4/IPv6 decoder 30 of mobile node 42 increases.
Also have, mobile node 42 always is to use two-way channel to communicate by home agent 41.Another problem that can cause like this is which network mobile node IPv4/IPv6 decoder 30 can not be known and really moving forward.
This shows that the network system of above-mentioned existing use IPv4/IPv6 decoder obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem of the network system existence of using the IPv4/IPv6 decoder, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that the network system of above-mentioned existing use IPv4/IPv6 decoder exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, network system in the hope of the use IPv4/IPv6 decoder of founding a kind of new structure, can improve the network system of general existing use IPv4/IPv6 decoder, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective of the network system existence of existing use IPv4/IPv6 decoder, and provide a kind of network system of new use IPv4/IPv6 decoder, technical problem to be solved is to make its load capacity that can reduce mobile node and the mobile node traffic carrying capacity to the IPv4/IPv6 decoder, and the IPv4/IPv6 decoder can be known the current location of the node that moves in the IPv6 network, thereby is suitable for practicality more.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, major technique of the present invention thes contents are as follows:
The present invention proposes a kind of network system of the IPv4/IPv6 of use decoder, this network system utilizes the IPv4/IPv6 decoder to carry out the two-way decoding of packet between IPv6 and IPv4 agreement, is furnished with an address table (address table) on the decoder, be used to each node paired store home address and Care-of Address, and decoder is roamed out ownership at mobile node and is connected the corresponding node of back as the MIPv6 of institute mobile node, and have: use by and these IPv6 mobile nodes between the pattern in path of communication optimization, and the pattern of not using the path of optimization.
In addition, also be equipped with processing data packets portion on the IPv4/IPv6 decoder, be used to handle the packet that receives from each MIPv6 mobile node, and the route optimized path by obtaining according to the processing data packets result, communicate with the MIPv6 mobile node.
Also have, if the mobile node from MIPv6 that receives comprises an extension header, the processing data packets portion of IPv4/IPv6 decoder also handles this extension header.
According to the present invention, when the mobile node based on the MIPv6 agreement shift out ownership connect and roam into the IPv6 network one outside connect and connect by this outside by the IPv4/IPv6 decoder with the IPv4 network on a node when communicating, the IPv4/IPv6 decoder can be used as a corresponding node job, and this corresponding node is the communication homologue of MIPv6 mobile node.So just may reduce the traffic carrying capacity of mobile node to the IPv4/IPv6 decoder.
In addition, when using the routing optimality selection function of MIPv6, just might optimize route and carry out by the communication of mobile node to the IPv4/IPv6 decoder by this.
In sum, the network system of the use IPv4/IPv6 decoder of special construction of the present invention, can reduce the load capacity of mobile node and mobile node traffic carrying capacity, and the IPv4/IPv6 decoder can be known the current location of the node that moves in the IPv6 network to the IPv4/IPv6 decoder.It has above-mentioned many advantages and practical value, and in like product, do not see have similar structural design to publish or use and really genus innovation, no matter it structurally or bigger improvement all arranged on the function, have large improvement technically, and produced handy and practical effect, and the network system of more existing use IPv4/IPv6 decoder has the multinomial effect of enhancement, thereby be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by a preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is to use the block diagram of the network system of existing IPv4/IPv6 decoder.
Fig. 2 is the system works block diagram of corresponding node 50 when not having the routing optimality selection function.
Fig. 3 is the system works block diagram when using two-way channel.
Fig. 4 is the system works block diagram of corresponding node 50 when the routing optimality selection function is arranged.
Fig. 5 is the block diagram of Location Registration program.
Fig. 6 is the block diagram of the method for direct communication.
Fig. 7 is the block diagram of routing optimality option program.
Fig. 8 is the schematic diagram of HoTI packet format.
Fig. 9 is the schematic diagram of CoTI packet format.
Figure 10 is the block diagram of the communication means when using two-way channel in the mode of home agent.
Figure 11 is the block diagram of one embodiment of the invention.
Figure 12 answers HoTI bag and the block diagram of the form of the ICMP erroneous packets that transmits.
Figure 13 answers CoTI bag and the block diagram of the form of the ICMP erroneous packets that transmits.
Figure 14 is the schematic diagram of HoT packet format.
Figure 15 is the schematic diagram of CoT packet format.
Figure 16 is the schematic diagram of BU packet format.
Figure 17 is the schematic diagram of BA packet format.
Figure 18 is the block diagram of the communication route of admittance after the Location Registration program is finished.
Figure 19 is the block diagram of an example of IPv4/IPv6 decoder major part of the present invention.
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, its embodiment of network system, structure, feature and the effect thereof of the use I Pv4/IPv6 decoder that foundation the present invention is proposed, describe in detail as after.
Figure 11 is the block diagram of explanation one embodiment of the invention, identical identical parts of Reference numeral representative among Figure 11, Fig. 7 and Figure 10.
The invention provides a kind of like this mechanism, can communicate by letter with the conduct that the belongs to IPv4 network 20 IPv4 node of homologue of the IPv6 node 11 that belongs to IPv6 network 10 communicates, and needn't consider that IPv4 node 21 does not have the MIPv6 function, supposes:
1) when the IPv6 node 11 that belongs to the IPv6 network with belong to when communicating between the IPv4 node 21 of IPv4 network, IPv4/IPv6 decoder 30 is used to the two-way decoding bag between IPv6 and the IPv4 agreement; And
2) use MIPv6, even like this when the IPv6 node is roamed out the IPv6 network, this IPv6 node 11 that belongs to this IPv6 network 10 still can communicate.
When the ownership in mobile node 42 resides in IPv6 network 10 connects 40, that is to say, roam out before this connects at it, this node can be under the situation of not using the MIPv6 function IPv4/IPv6 decoder by as shown in figure 11 communicate with the IPv4 node 21 that is busy with IPv4 network 20.
Comparatively speaking, the ownership of roaming out IPv6 network 10 when mobile node 42 connects 40 and when communicating from the IPv4 node on the IPv4 network 20 of an external network, and under normal circumstances the routing optimality program is performed.At this constantly, mobile node 42 sends HoTI with virtual IP address v6 address that the IPv4 address of the corresponding IPv4 node 21 of communication is associated and CoTi wraps to one.
Answer this mobile node 42 to attempt the above-mentioned routing optimality program of carrying out, IPv4/IPv6 decoder 30 can be selected from following mode of operation option according to system manager's management strategy:
(a) communication between mobile node 42 and the IPv4/IPv6 decoder 30 is not used and is optimized the path.
(b) communication between mobile node 42 and the IPv4/IPv6 decoder 30 is used and is optimized the path.
-mode of operation (a)
IPv4/IPv6 decoder 30 wraps corresponding ICMP erroneous packets by the HoTI that respectively mobile node 42 sent and CoTI and returns, and refusal uses optimizes route, thereby stops mobile node 42 to send HoTI and CoTI bag once more.Mobile node 42 is not attempted to carry out the routing optimality program and is utilized two-way channel to communicate by home agent 41 after receiving these bags, as the situation shown among Figure 10.
Figure 12 is the form that the ICMPv6 erroneous packets of HoTI bag transmission is answered in explanation.The ICMPv6 erroneous packets is made up of ipv6 header and ICMPv6 packets (message).The source address of ipv6 header represent a pair of should be in the virtual IP address v6 address of an IPv4 address, and destination address is represented a home address.The type of ICMPv6 packets is that a parameter problem and its code are " unrecognized next header typeencountered " (next header type can not be discerned).
Figure 13 is that explanation answers CoTI to wrap the schematic diagram of the form of the ICMPv6 erroneous packets that transmits.The ICMPv6 erroneous packets is made up of ipv6 header and ICMPv6 packets equally.The source address of ipv6 header represent a pair of should be in the virtual IP address v6 address of an IPv4 address, and destination address is represented a Care-of Address.The type of ICMPv6 packets is that a parameter problem and its code are " unrecognized next header typeencountered " (next header type can not be discerned).
-mode of operation (b)
IPv4/IPv6 decoder 30 can respond the HoTI that is sent by mobile node 42 and the CoTI bag returns HoT respectively and thereby the CoT bag uses the optimization route.
Figure 14 is the schematic diagram of explanation HoT packet format.The HoT bag is made up of ipv6 header and mobile message.The source address of ipv6 header represent a pair of should be in the virtual IP address v6 address of an IPv4 address, and destination address is represented a home address.The type of mobile header is HoT.
Figure 15 is the schematic diagram of explanation CoT packet format.The CoT bag is made up of ipv6 header and mobile message.The source address of ipv6 header represent a pair of should be in the virtual IP address v6 address of an IPv4 address, and destination address is represented a Care-of Address.The type of mobile header is CoT.
Figure 16 is the schematic diagram of explanation BU packet format.The BU bag is moved header and is formed by ipv6 header, purpose selection header and.The source address of ipv6 header is represented Care-of Address, and destination address is represented the virtual IP address v6 address of a corresponding IPv4 address.
Figure 17 is the schematic diagram of explanation BA packet format.The BA bag is made up of ipv6 header, route header and mobile header.The source address of ipv6 header is represented the virtual IP address v6 address of a corresponding IPv4 address, and that destination address is represented to deliver is underground.The type of route header is 2, and the residue section is 1, and a home address is represented in the address.The type of mobile header is BA.
When mobile node 42 is finished above-mentioned Location Registration program, have one on the IPv4/IPv6 decoder 30 with the home address of mobile node 42 and the Care-of Address table that is mutually related.Like this, as shown in figure 18, just communicate between mobile node 42 and the IPv4/IPv6 decoder 30 by optimizing route.
Hypothesis belongs to the service of the IPv6 node 11 of IPv6 network 10 by the existing IPv4 network 20 of IPv4/IPv6 decoder 30 uses now.If mobile node 42 began to communicate with IPv4 node 21 before swimming out of, swim out of the back at this joint so and carry out the routing optimality program for the IPv4/IPv6 decoder.In this case, if IPv4/IPv6 decoder 30 uses the routing optimality function, mobile node 42 just can still can continue to communicate with IPv4 node 21 after this node is swum out of by optimizing route.
If IPv4/IPv6 decoder 30 does not use the routing optimality function, just might immediately stop mobile node 42 by the routing optimality program and reduce the load capacity of mobile node 42.
Figure 19 is the block diagram of an instantiation of explanation IPv4/IPv6 decoder major part of the present invention.For example, this major part comprises determination part 31, bag handling part 32 and address table storage part 33.
The configuration from the MIPv6 mobile node that receives of 31 pairs of determination parts of bag is measured, and as being only to comprise extension header in this bag, or only comprises user data, or extension header and user data all comprise or do not comprise.
For example, wrap handling part 32 and comprise ipv6 header inspection piece 32a, purpose selection header inspection piece 32b, route header inspection piece 32c and mobile header inspection piece 32d.
If bag processing block 32 has received the MIPv6 mobile node that contains extension header and has just carried out the extension header processing.In the process of handling mobile header, bag processing block 32 generates an address table, for each MIPv6 node is listed home address and Care-of Address in couples, and this table is stored in the address table storage part 33.
The result is exactly that IPv4/IPv6 decoder 30 can be as the corresponding node of MIPv6 mobile node, and can accurately know position or its current location that each MIPv6 mobile node is being shifted to.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (3)
1. a network system is characterized in that, comprising:
The IPv4/IPv6 decoder carries out the two-way decoding between IPv6 and IPv4 agreement; And
A plurality of MIPv6 mobile nodes after described a plurality of MIPv6 mobile nodes roam into outside its ownership connection, transmit HoTI packet with home address and the CoTI packet with Care-of Address,
Wherein said IPv4/IPv6 decoder more comprises:
Address table is used to each MIPv6 mobile node to store described home address and described Care-of Address in couples, and
Two operator schemes are used for communicating with described MIPv6 mobile node, and wherein said two operator schemes are optimization pattern and unoptimizable pattern,
Wherein in the operator scheme of unoptimizable pattern, the function of described IPv4/IPv6 decoder is equivalent to the corresponding node of described MIPv6 mobile node, it is by keeping lasting communication, with described HoTI packet and the described CoTI packet that receives respectively based on described MIPv6 mobile node, the ICMP mistake is returned to described MIPv6 mobile node
In the operator scheme of optimizing pattern, the function of described IPv4/IPv6 decoder is equivalent to the corresponding node of described MIPv6 mobile node, it is by based on described HoTI packet and described CoTI packet, the described home address and the Care-of Address of described MIPv6 mobile node are stored in the described address table, and no longer transmit described HoTI packet and described CoTI packet to the IPv4 node, with the agency of described IPv4 node, execution route optimization; And will not send described IPv4 node to from the Binding Update BU that described MIPv6 mobile node receives, with the agency of described IPv4 node, the location registration program.
2. network system according to claim 1, it is characterized in that wherein said IPv4/IPv6 decoder is equipped with one to be used to handle the bag handling part from the bag of each MIPv6 mobile node that receives, and described IPv4/IPv6 decoder, result according to described bag processing, by an optimization path, communicate with described MIPv6 mobile node.
3. network system according to claim 1 and 2 is characterized in that, wherein, if comprise an extension header from the bag that described MIPv6 mobile node receives, the bag handling part of described IPv4/IPv6 decoder is carried out extension header and handled.
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| CN 200410096934 CN1787517B (en) | 2004-12-06 | 2004-12-06 | Network system using IPv4/IPv6 decoder |
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| CN 200410096934 CN1787517B (en) | 2004-12-06 | 2004-12-06 | Network system using IPv4/IPv6 decoder |
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| CN1787517B true CN1787517B (en) | 2011-03-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1251668A2 (en) * | 2001-04-18 | 2002-10-23 | Hitachi, Ltd. | Method of translating protocol at translator, method of providing protocol translation information at translation server, and address translation server |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1251668A2 (en) * | 2001-04-18 | 2002-10-23 | Hitachi, Ltd. | Method of translating protocol at translator, method of providing protocol translation information at translation server, and address translation server |
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| JP特開2003-283578A 2003.10.03 |
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