CN107682472A - IPv4 and IPv6 interoperability methods, apparatus and system based on RTSP reverse proxys - Google Patents
IPv4 and IPv6 interoperability methods, apparatus and system based on RTSP reverse proxys Download PDFInfo
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- CN107682472A CN107682472A CN201710999584.1A CN201710999584A CN107682472A CN 107682472 A CN107682472 A CN 107682472A CN 201710999584 A CN201710999584 A CN 201710999584A CN 107682472 A CN107682472 A CN 107682472A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
- H04L61/251—Translation of Internet protocol [IP] addresses between different IP versions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
- H04L61/2521—Translation architectures other than single NAT servers
- H04L61/2528—Translation at a proxy
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Abstract
The invention provides a kind of IPv4 based on RTSP reverse proxys and IPv6 interoperability methods, including：The connection message sent according to IPv6 clients is selected from mapping ruler set most matches mapping ruler, recording conversation mapping relations；The request message that IPv6 clients are sent is received, is IPv4 addresses and port by the IPv6 addresses in request message and port translation, the request message after conversion is sent to IPv4 application servers according to session mapping relations；The response message that IPv4 application servers are sent is received, is IPv6 addresses and port by the IPv4 addresses in response message and port translation, the response message after conversion is sent to IPv6 clients according to session mapping relations.Present invention also offers a kind of IPv4 based on reverse proxy and IPv6 interworking units and system, IPv4 application server quickly can be moved to IPv6 networks by this method.
Description
Technical field
The invention belongs to Next Generation Internet IPv6 technical fields, and in particular to IPv4 based on RTSP reverse proxys with
IPv6 interoperability methods, apparatus and system.
Background technology
Broadband network is the critical infrastructures of socio-economic development as information-based important carrier is realized.With net
The rapid development of network technology, the exhaustion of IPv4 address resources, its intrinsic limitation can not meet the needs of network Development, also band
Carry out some technical problems.IPv6 substitutions IPv4 turns into trend of the times.However, because the storage of current IPv4 user is bigger,
Most existing networks do not support IPv6 to apply, and great difficulty and challenge are brought to IPv6 transition to IPv4.In order to ensure
The smooth transition of business, whole evolution cycle will be a long-term processes, that is, IPv4 and the process of IPv6 long-term co-existence.
Therefore, IPv6 transition schemes are particularly important.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of IPv4 based on RTSP reverse proxys with
IPv6 interoperability methods, apparatus and system, the shortcomings that for overcoming in the prior art.
Specifically, the present invention proposes embodiment in detail below：
The embodiments of the invention provide a kind of IPv4 based on RTSP reverse proxys and IPv6 interoperability methods, including：
The RTSP reverse proxys connection message that IPv6 clients are sent is received, according to the message that connects from default address
Selected in port mapping regular collection and most match mapping ruler, being established according to the most matching mapping ruler should with corresponding IPv4
With the connection of server, second meeting of the record with the first session mapping relations of IPv6 clients and with IPv4 application servers
Talk about mapping relations；
The RTSP reverse proxy request messages that IPv6 clients are sent are received, according to the mapping ruler that most matches by described in
IPv6 addresses in request message are corresponding IPv4 addresses and port with port translation, according to the second session mapping relations
Request message after conversion is sent to corresponding IPv4 application servers；
The RTSP reverse proxy response messages that IPv4 application servers are sent are received, will according to the mapping ruler that most matches
IPv4 addresses in the response message are corresponding IPv6 addresses and port with port translation, are mapped according to first session
Response message after conversion is sent to corresponding IPv6 clients by relation.
As the further improvement of above-mentioned technical proposal, the first session mapping relations and second session mapping are closed
System uses a kind of stateful double stack interworking technologies, and the stateful expression needs to safeguard the mapping relations of 2 sessions, institute
State double 2 sessions of stack representation and use different agreements, wherein the first session uses IPv6 agreements, the second session is assisted using IPv4
View；Stateful double stack interworking technologies support the lateral IPv4 network sides resource of IPv6 networks to initiate connection.
As the further improvement of above-mentioned technical proposal, the default address port mapping ruler collection is combined into IPv4 applications
The IPv4 addresses of server and the port of offer service externally provide the IPv6 addresses and end of service with RTSP reverse proxys
The set of the mapping relations of mouth.
As the further improvement of above-mentioned technical proposal, the default address port mapping ruler set is manual by user
Configuration.
The embodiment of the present invention additionally provides a kind of IPv4 based on RTSP reverse proxys and IPv6 interworking units, including：
Conversation establishing module, the RTSP reverse proxys for receiving the transmission of IPv6 clients connect message, according to the company
Text of being informed of a case is selected from default address port mapping ruler set most matches mapping ruler, and mapping ruler is most matched according to described
Establish the connection with corresponding IPv4 application servers, record and the first session mapping relations and and IPv4 of IPv6 clients
Second session mapping relations of application server；
Request processing module, for receive IPv6 clients transmission RTSP reverse proxy request messages, according to it is described most
It is corresponding IPv4 addresses and port with port translation that mapping ruler, which is matched, by the IPv6 addresses in the request message, according to institute
State the second session mapping relations and the request message after conversion is sent to corresponding IPv4 application servers；
Response processing module, the RTSP reverse proxy response messages sent with reception IPv4 application servers, according to described
It is corresponding IPv6 addresses and port that mapping ruler, which is most matched, by the IPv4 addresses in the response message and port translation, according to
Response message after conversion is sent to corresponding IPv6 clients by the first session mapping relations.
As the further improvement of above-mentioned technical proposal, the first session mapping relations and second session mapping are closed
System uses a kind of stateful double stack interworking technologies, and the stateful expression needs to safeguard the mapping relations of 2 sessions, institute
State double 2 sessions of stack representation and use different agreements, wherein the first session uses IPv6 agreements, the second session is assisted using IPv4
View；Stateful double stack interworking technologies support the lateral IPv4 network sides resource of IPv6 networks to initiate connection.
As the further improvement of above-mentioned technical proposal, the default address port mapping ruler collection is combined into IPv4 applications
The IPv4 addresses of server and the port of offer service externally provide the IPv6 addresses and end of service with RTSP reverse proxys
The set of the mapping relations of mouth.
As the further improvement of above-mentioned technical proposal, the default address port mapping ruler set is manual by user
Configuration.
The embodiment of the present invention additionally provides a kind of IPv4 based on RTSP reverse proxys and IPv6 intercommunicating systems, including：On
State IPv4 and IPv6 interworking units, IPv6 clients and IPv4 application servers based on RTSP reverse proxys, the IPv6 visitors
Family end is established network physical with the interworking unit and is connected, and the IPv4 application servers establish network thing with the interworking unit
Reason connection.
As the further improvement of above-mentioned technical proposal, the interworking unit is responsible for handling RTSP protocol traffics, and externally
RTSP application services based on IPv6 are provided.
Using technical scheme provided by the invention, compared with existing known technology, at least have as follows
Beneficial effect：
1st, quickly IPv4 applications can be moved in the case where IPv4 application providers do not upgrade and do not change existing system
IPv6 networks are moved on to, realize the intercommunication of IPv6 networks and IPv4 networks, there is provided IPv6 sides access IPv4 sides network application resources
Ability.
2nd, can by different IPv6 networking clients by configuring its mapping relations with practical IP v4 application servers,
IPv4 application servers are enable to provide service in multiple IPv6 networks, effectively scattered flow, while serve and resist necessarily
The effect of the flow attacking of degree.
3rd, because the address of IPv4 application servers and port information are not announced IPv6 outer nets, it can prevent outer net from asking
Attacking system is connected, serves certain security firewall effect.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is a kind of IPv4 based on RTSP reverse proxys and IPv6 interoperability methods that the embodiment of the present invention proposes flow
Schematic diagram.
Fig. 2 is the network topology connection diagram for the RTSP reverse proxys that the embodiment of the present invention proposes.
Fig. 3 is a kind of IPv4 based on RTSP reverse proxys and IPv6 interworking units that the embodiment of the present invention proposes structure
Schematic diagram.
Fig. 4 is a kind of IPv4 based on RTSP reverse proxys and IPv6 intercommunicating systems that the embodiment of the present invention proposes structure
Schematic diagram.
Main element symbol description：
10-IPv6 clients；11- interworking units；12-IPv4 application servers；101- conversation establishing modules；102- is asked
Processing module；103- response processing modules.
Embodiment
Hereinafter, the various embodiments of the disclosure will be described more fully.The disclosure can have various embodiments, and
It can adjust and change wherein.It should be understood, however, that：It is limited to specific reality disclosed herein in the absence of by disclosure protection domain
The intention of example is applied, but the disclosure should be interpreted as covering all in the spirit and scope for the various embodiments for falling into the disclosure
Adjustment, equivalent and/or alternative.
Hereinafter, disclosed in the term " comprising " that can be used in the various embodiments of the disclosure or " may include " instruction
Function, operation or the presence of element, and do not limit the increase of one or more functions, operation or element.In addition, such as exist
Used in the various embodiments of the disclosure, term " comprising ", " having " and its cognate are meant only to represent special characteristic, number
Word, step, operation, the combination of element, component or foregoing item, and be understood not to exclude first one or more other
Feature, numeral, step, operation, element, component or foregoing item combination presence or one or more features of increase, numeral,
Step, operation, element, component or foregoing item combination possibility.
The statement (" first ", " second " etc.) used in the various embodiments of the disclosure can be modified in various implementations
Various element in example, but respective sets can not be limited into element.For example, presented above be not intended to limit the suitable of the element
Sequence and/or importance.The purpose presented above for being only used for differentiating an element and other elements.For example, the first user sets
Standby and second user equipment instruction different user devices, although the two is all user equipment.For example, each of the disclosure is not being departed from
In the case of the scope of kind embodiment, the first element is referred to alternatively as the second element, and similarly, the second element is also referred to as first
Element.
It should be noted that：, can be by the first composition member if an element ' attach ' to another element by description
Part is directly connected to the second element, and " connection " the 3rd can be formed between the first element and the second element
Element.On the contrary, when an element " being directly connected to " is arrived into another element, it will be appreciated that be in the first element
And second be not present the 3rd element between element.
The term used in the various embodiments of the disclosure is only used for describing the purpose of specific embodiment and not anticipated
In the various embodiments of the limitation disclosure.Unless otherwise defined, be otherwise used herein all terms (including technical term and
Scientific terminology) there is the implication identical being generally understood that with the various embodiment one skilled in the art of the disclosure to contain
Justice.The term (term such as limited in the dictionary typically used) be to be interpreted as have with correlative technology field
Situational meaning identical implication and the implication with Utopian implication or overly formal will be not construed as, unless at this
It is clearly defined in disclosed various embodiments.
Embodiment 1
As shown in figure 1, the embodiments of the invention provide one kind to be based on RTSP (Real Time Streaming
Protocol, real time streaming transport protocol) reverse proxy IPv4 and IPv6 interoperability methods, including：
S101, the RTSP reverse proxys connection message that IPv6 clients are sent is received, according to the connection message from default
Address port mapping ruler set in select and most match mapping ruler, according to it is described most match mapping ruler establish with it is corresponding
The connection of IPv4 application servers, record with the first session mapping relations of IPv6 clients and with IPv4 application servers
Second session mapping relations.
In the present embodiment, the first session mapping relations and the second session mapping relations use one kind to have
Double stack interworking technologies of state, wherein, the stateful expression needs to safeguard the mapping relations of 2 sessions, double stack representations 2
Individual session uses different agreements, wherein the first session uses IPv6 agreements, the second session uses IPv4 agreements；It is described stateful
Double stack interworking technologies support the lateral IPv4 network sides resource of IPv6 networks to initiate connection.
The default address port mapping ruler collection is combined into the IPv4 addresses of IPv4 application servers and provides service
Port and RTSP reverse proxys the set of the IPv6 addresses of service and the mapping relations of port is externally provided.
The default address port mapping ruler set is by user's manual configuration.
S102, the RTSP reverse proxy request messages that IPv6 clients are sent are received, mapping ruler is most matched according to described
With port translation it is corresponding IPv4 addresses and port by the IPv6 addresses in the request message, is reflected according to second session
Penetrate relation and the request message after conversion is sent to corresponding IPv4 application servers.
S103, the RTSP reverse proxy response messages that IPv4 application servers are sent are received, mapped according to the most matching
IPv4 addresses in the response message are corresponding IPv6 addresses and port with port translation by rule, according to first meeting
Response message after conversion is sent to corresponding IPv6 clients by words mapping relations.
As shown in Fig. 2 for example, IPv6 clients pass through IPv6 addresses 2002::2 IPv6 provided with RTSP reverse proxys
Address 2001::1 establishes connection, and IPv4 application servers are provided by IPv4 addresses 10.10.10.1 and RTSP reverse proxys
IPv4 addresses 14.14.14.14 establishes connection.
RTSP reverse proxys receive the RTSP reverse proxys connection message that IPv6 clients are sent, and 3 in the connection message
The source address of layer IPv6 protocol sections is 2002::2, port is random；Destination address is 2001::1, port 8554, and preset
Address port mapping ruler set have following at least two mapping rulers：
Rule 1：IPv6=2001::1PORT=8554<-->IPv4=10.10.10.1PORT=554
Rule 2：IPv6=2001::1PORT=8000<-->IPv4=10.10.10.1PORT=52
Destination address in connection message is 2001::1, port is 8554 from default address port mapping ruler
The conduct of rule 1 is selected in set and most matches mapping ruler.The IPv4=10.10.10.1PORT=554 provided further according to rule 1
Information is connected with corresponding IPv4 application servers, and record is answered with the first session mapping relations of IPv6 clients and with IPv4
With the second session mapping relations of server.First session mapping relations are specially IPv6 clients and RTSP reverse proxys：
2002::2# random ports<->2001::1#8554, the second session mapping relations are specially that RTSP reverse proxys are applied with IPv4
Server：14.14.14.14# random port<->10.10.10.1#554.
RTSP reverse proxys receive the RTSP reverse proxy request messages that IPv6 clients are sent, according to rule 1 by described in
IPv6 addresses in request message and port translation are corresponding IPv4 addresses and port, such as：Request message before conversion
Server address content is rtsp://[2001::1]:It is changed into rtsp after 8554 conversions://10.10.10.1:554；According to described
Request message after conversion is sent to corresponding IPv4 application servers by the second session mapping relations.
RTSP reverse proxys receive the RTSP reverse proxy response messages that IPv4 application servers are sent, will according to rule 1
IPv4 addresses in the response message and port translation are corresponding IPv6 addresses and port, such as：Response report before conversion
The server address content of text is rtsp://10.10.10.1:It is changed into rtsp after 554 conversions://[2001::1]:8554；According to
Response message after conversion is sent to corresponding IPv6 clients by the first session mapping relations.
Embodiment 2
As shown in figure 3, the embodiments of the invention provide a kind of IPv4 based on RTSP reverse proxys and IPv6 interworking units,
Including：Conversation establishing module 101, request processing module 102 and response processing module 103.
Conversation establishing module 101, the RTSP reverse proxys for receiving the transmission of IPv6 clients connect message, according to described
Connection message is selected from default address port mapping ruler set most matches mapping ruler, according to the most matching mapping rule
Then establish with the connections of corresponding IPv4 application servers, the first session mapping relations of record and IPv6 clients and with
Second session mapping relations of IPv4 application servers；
Request processing module 102, for receiving the RTSP reverse proxy request messages of IPv6 clients transmission, according to described
It is corresponding IPv4 addresses and port that mapping ruler, which is most matched, by the IPv6 addresses in the request message and port translation, according to
Request message after conversion is sent to corresponding IPv4 application servers by the second session mapping relations；
Response processing module 103, the RTSP reverse proxy response messages sent with reception IPv4 application servers, according to institute
It is corresponding IPv6 addresses and port to state and most match mapping ruler by the IPv4 addresses in the response message and port translation, root
The response message after conversion is sent to corresponding IPv6 clients according to the first session mapping relations.
First session mapping relations and the second session mapping relations use a kind of stateful double stack intercommunication skills
Art, the stateful expression need to safeguard the mapping relations of 2 sessions, and described double 2 sessions of stack representation use different agreements,
Wherein the first session uses IPv6 agreements, and the second session uses IPv4 agreements；Stateful double stack interworking technologies are supported
The lateral IPv4 network sides resource of IPv6 networks initiates connection.
The default address port mapping ruler collection is combined into the IPv4 addresses of IPv4 application servers and provides service
Port and RTSP reverse proxys the set of the IPv6 addresses of service and the mapping relations of port is externally provided.
The default address port mapping ruler set is by user's manual configuration.
Embodiment 3
As shown in figure 4, the embodiments of the invention provide a kind of IPv4 based on RTSP reverse proxys and IPv6 intercommunicating systems,
Including：The IPv4 based on RTSP reverse proxys that embodiment 2 provides should with IPv6 interworking units 11, IPv6 clients 10 and IPv4
With server 12, IPv6 clients 10 are established network physical with interworking unit 11 and are connected, and IPv4 application servers 12 fill with intercommunication
Put 10 and establish network physical connection.
Interworking unit 11 is responsible for processing RTSP protocol traffics, and externally provides the RTSP application services based on IPv6.
IPv4 and IPv6 intercommunicating systems based on RTSP reverse proxys, can not upgrade and change existing in application provider
In the case of systems, IPv4 applications are quickly moved into IPv6 networks, realize the intercommunication of IPv6 networks and IPv4 networks, there is provided
IPv6 sides access the ability of IPv4 sides network application resources；Secondly, by application level translation technology, by the service in request message
The IPv6 address informations that device is related to and port translation are corresponding IPv4 addresses and port, by the IPv4 being related in response message
Location information is corresponding IPv6 addresses and port with port translation so that business can be handled normally；In addition, practical IP v4 is applied
The address of server and port information are not announced externally, can be prevented outer net request connection attacking system, be served certain peace
Full fire wall effect；Both can solve RTSP and move to IPv6 from IPv4 using (video request program, video conference), and can be it again
He offers reference in the application migration of agreement, and such as SNMP applies (Simple Network Management Protocol application).
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram for being preferable to carry out scene, module in accompanying drawing or
Flow is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in equipment in implement scene can be described according to implement scene into
Row is distributed in the equipment of implement scene, can also carry out respective change and be disposed other than the one or more of this implement scene to set
In standby.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
The invention described above sequence number is for illustration only, does not represent the quality of implement scene.Disclosed above is only the present invention
Several specific implementation scenes, still, the present invention is not limited to this, and the changes that any person skilled in the art can think of is all
Protection scope of the present invention should be fallen into.
Claims (10)
1. a kind of IPv4 based on RTSP reverse proxys and IPv6 interoperability methods, it is characterised in that including：
The RTSP reverse proxys connection message that IPv6 clients are sent is received, according to the message that connects from default address port
Selected in mapping ruler set and most match mapping ruler, established and corresponding IPv4 application clothes according to the mapping ruler that most matches
The connection of business device, record reflect with the first session mapping relations of IPv6 clients and with the second session of IPv4 application servers
Penetrate relation；
The RTSP reverse proxy request messages that IPv6 clients are sent are received, according to the mapping ruler that most matches by the request
IPv6 addresses in message are corresponding IPv4 addresses and port with port translation, will be turned according to the second session mapping relations
Request message after changing is sent to corresponding IPv4 application servers；
The RTSP reverse proxy response messages that IPv4 application servers are sent are received, according to the mapping ruler that most matches by described in
IPv4 addresses in response message are corresponding IPv6 addresses and port with port translation, according to the first session mapping relations
Response message after conversion is sent to corresponding IPv6 clients.
2. the IPv4 according to claim 1 based on RTSP reverse proxys and IPv6 interoperability methods, it is characterised in that described
First session mapping relations and the second session mapping relations use a kind of stateful double stack interworking technologies, described to have
State representation needs to safeguard the mapping relations of 2 sessions, and described double 2 sessions of stack representation use different agreements, wherein first
Session uses IPv6 agreements, and the second session uses IPv4 agreements；Stateful double stack interworking technologies support IPv6 network sides
Initiate to connect to IPv4 network sides resource.
3. the IPv4 according to claim 1 based on RTSP reverse proxys and IPv6 interoperability methods, it is characterised in that described
Default address port mapping ruler collection is combined into the IPv4 addresses of IPv4 application servers and provides port and the RTSP of service
Reverse proxy externally provides the set of the IPv6 addresses of service and the mapping relations of port.
4. the IPv4 according to claim 1 based on RTSP reverse proxys and IPv6 interoperability methods, it is characterised in that described
Default address port mapping ruler set is by user's manual configuration.
5. a kind of IPv4 based on RTSP reverse proxys and IPv6 interworking units, it is characterised in that including：
Conversation establishing module, the RTSP reverse proxys for receiving the transmission of IPv6 clients connect message, are reported according to the connection
Text is selected from default address port mapping ruler set most matches mapping ruler, is established according to the mapping ruler that most matches
With the connection of corresponding IPv4 application servers, record is applied with the first session mapping relations of IPv6 clients and with IPv4
Second session mapping relations of server；
Request processing module, for receiving the RTSP reverse proxy request messages of IPv6 clients transmission, most matched according to described
IPv6 addresses in the request message are corresponding IPv4 addresses and port with port translation by mapping ruler, according to described
Request message after conversion is sent to corresponding IPv4 application servers by two session mapping relations；
Response processing module, with the RTSP reverse proxy response messages for receiving IPv4 application servers and sending, according to it is described most
By the IPv4 addresses in the response message it is corresponding IPv6 addresses and port with port translation with mapping ruler, according to described
Response message after conversion is sent to corresponding IPv6 clients by the first session mapping relations.
6. the IPv4 according to claim 5 based on RTSP reverse proxys and IPv6 interworking units, it is characterised in that described
First session mapping relations and the second session mapping relations use a kind of stateful double stack interworking technologies, described to have
State representation needs to safeguard the mapping relations of 2 sessions, and described double 2 sessions of stack representation use different agreements, wherein first
Session uses IPv6 agreements, and the second session uses IPv4 agreements；Stateful double stack interworking technologies support IPv6 network sides
Initiate to connect to IPv4 network sides resource.
7. the IPv4 according to claim 5 based on RTSP reverse proxys and IPv6 interworking units, it is characterised in that described
Default address port mapping ruler collection is combined into the IPv4 addresses of IPv4 application servers and provides port and the RTSP of service
Reverse proxy externally provides the set of the IPv6 addresses of service and the mapping relations of port.
8. the IPv4 according to claim 5 based on RTSP reverse proxys and IPv6 interworking units, it is characterised in that described
Default address port mapping ruler set is by user's manual configuration.
9. a kind of IPv4 based on RTSP reverse proxys and IPv6 intercommunicating systems, it is characterised in that including：Claim 5-8 appoints
The IPv4 and IPv6 interworking units, IPv6 clients and IPv4 application servers based on RTSP reverse proxys described in one, institute
State IPv6 clients and establish network physical with the interworking unit and be connected, the IPv4 application servers are built with the interworking unit
Vertical network physical connection.
10. the IPv4 according to claim 9 based on RTSP reverse proxys and IPv6 intercommunicating systems, it is characterised in that institute
State interworking unit to be responsible for handling RTSP protocol traffics, and the RTSP application services based on IPv6 are externally provided.
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| CN114338596A (en) * | 2021-12-23 | 2022-04-12 | 天翼视讯传媒有限公司 | IPv6 and IPv4 conversion method applied to network migration |
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