CN103166825B - The method and system of network interworking is realized by expanding universal routed encapsulation technology - Google Patents
The method and system of network interworking is realized by expanding universal routed encapsulation technology Download PDFInfo
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Abstract
The present invention provides the method and systems that network interworking is realized by expanding universal routed encapsulation technology, when identifying progress message intercommunication between net and public network or identifying net built-in message intercommunication, after source router receives IP packet, increase RID corresponding with AID in IP packet in IP packet as RID heads, the GRE head structures for increasing sign net access GRE networks are sent to destination router as extension encapsulated message；After destination router receives extension encapsulated message, after judging that RID corresponds to local address in the RID heads of extension encapsulated message, when judging in extension encapsulated message the GRE instructions for carrying mark net access GRE networks, encapsulated message will be extended directly remove RID and GRE and obtain IP packet and forward this IP packet.Equipment disposal ability, ASR, ISR, the direct bases of ILR can be greatly improved in this method<AID, RID>Mapping item carries out tunnel encapsulation.
Description
Technical field
The present invention relates to communication identifier network technologies, more specifically, being related to one kind by expanding universal routed encapsulation
(Generic Routing Encapsulation, abbreviation GRE) technology realizes the method and system of network interworking.
Background technology
Existing internet has obtained wide model application, but due to the defect of its basic agreement IP agreement used itself, operation
Quotient's IP network there are the problem of there is no fundamentally solving, and constrain the development of business.It is mainly manifested in：
(1) mobility problem：IP agreement design initially there is no in view of the support to terminal mobility, now nets and solves to move
There are two types of the schemes of dynamic sex chromosome mosaicism, first, the scheme based on terminal, such as mobile IP (Mobile IP), when the switching of this kind of scheme
Between it is long, need terminal to change, increase terminal processes load；Second is that network-based scheme, such as 3GPP schemes.This kind of side
Case is all there are one anchor point, the problem of fixed anchor point brings packet path detour, has aggravated transmission delay and bandwidth waste.
(2) safety issue：Personal user, network operator and government department are mainly manifested in by virus, DOS
Attack and invalid information propagation etc..Operator's IP network slightly improves at present, is mainly manifested in the retrospect energy to user behavior
Power is reinforced.
(3) route system scaling concern：Current operator also makes us full without proposition solution route system autgmentability
The scheme of meaning.The excessive problem of routing table not only aggravates the processing load of router, cost increase, and make backbone network by
The convergence rate of agreement reduces, convergence frequency increases, and IP network is made to be more among unstable state.
Mark net is one of the solution detached for identity and position, and network shifting is efficiently solved from principle
The problem of dynamic property.In mark network technology system according to the present invention, the identity of mobile terminal is indicated with access mark (AID)
Information, switching-routing identifier (RID) indicate the location information of mobile terminal, and AID, which is fixed, to be distributed to user and remain unchanged,
RID is decided by the access Switch Router (ASR, Access.Switch Router, abbreviation ASR) where user.ASR will be moved
Terminal<AID, RID>ASR, integrated service router where all Correspondent Nodes of mapping relations notice mobile terminal
(Integrated Service Router, abbreviation ISR) and information registration server (ILR).Router passes through maintenance<
AID, RID>Mapping relations realize identity information and the mapping of the location information of mobile terminal of mobile terminal user and are associated with, when
When the position of user is changed, it is only necessary to update RID information, the AID information of identity user identity can remain constant.
When mobile terminal need access external network when, identity and position separated network access layer, that is, mobile terminal with
Between ASR using AID as message source address and destination address carry out message forwarding, message arrival ASR equipment after, need by
AID information in message replaces with RID information by way of encapsulating or converting and is sent to ISR, after being encapsulated again on ISR
Or transformed information is reduced to original AID, is forwarded in external network.Switch technology mentioned herein is usually will
The addresses AID encapsulate one layer of IP report again replacing with RID modes, the mode of encapsulation by way of mapping generally by outside
Head, source and the destination address of outer IP header fill in corresponding RID information.But there are one to ask for the technology of encapsulation described herein
The problem of topic, how this encapsulation distinguishes with the IP tunnel of standard.The IP tunnel (such as GRE) of standard is under normal circumstances
It needs to generate by manual configuration, if it were to be so, each<AID, RID>Map entry, it is necessary to generate a GRE
Tunnel, General System equipment is very limited for the tenability of gre tunneling, conventional tenability in 8k hereinafter, but<AID,
RID>Map entry with number of mobile users increase, after some time it is possible to reach millions of, at this moment, the bearing capacity of ASR and ISR
Huge test will be faced.
Invention content
The technical problem to be solved in the present invention is to provide the sides that network interworking is realized by expanding universal routed encapsulation technology
Method and system realize the intercommunication of mark net and external the Internet without configuring GRE tunnel.
In order to solve the above technical problem, the present invention provides realize network interworking by expanding universal routed encapsulation technology
Method, wherein mark net and public network between carry out message intercommunication or mark net built-in message intercommunication when, source router receives
After IP packet, increase switching-routing identifier (RID) corresponding with access mark (AID) in the IP packet in the IP packet
As RID heads, and the GRE head structures for increasing sign net access generic route encapsulation (GRE) network become extension encapsulation report
Text is sent to destination router；
After the destination router receives the extension encapsulated message, RID in the RID heads of the extension encapsulated message is judged
It, will when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message after local address
The extension encapsulated message directly removes RID and GRE and obtains IP packet and forward this IP packet.
Further, the above method can also have the characteristics that：
When the message nets transmission arrival public network from mark, the source router of the message is access Switch Router
(ASR), the message destination router is integrated service router (ISR)；
After the ASR receives the IP packet of mobile terminal transmission, judgement itself is in mark net and the IP packet
When destination address is located at public network, increase RID corresponding with source AID in the IP packet in the IP packet as RID
Head, and the GRE head structures for increasing sign net access GRE networks become extension encapsulated message and are sent to the ISR；
The ISR receives the extension encapsulated message, judges that RID corresponds to this in the RID heads of the extension encapsulated message
After way address, when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message, by the extension
Encapsulated message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to public network.
Further, the above method can also have the characteristics that：
When the message is sent to knowledge net up to standard from public network, the message source router of the message is integrated service road
By device (ISR), the message destination router is access Switch Router (ASR)；
The ISR judges that the interface for receiving this IP packet is the public network of mark net after public network receives IP packet
When the access interface of network side, increase RID corresponding with purpose AID in the IP packet in IP packet as RID heads, and increase and refer to
The GRE head structures that net access GRE networks are known in indicating become extension encapsulated message and are sent to ASR；
The ASR receives the extension encapsulated message, judges that RID corresponds to this in the RID heads of the extension encapsulated message
After way address, when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message, by the extension
Encapsulated message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to mobile terminal.
Further, the above method can also have the characteristics that：
When the message is sent inside mark net, the source router of the message is the first access Switch Router
(ASR), the destination router of the message is the 2nd ASR；
After first ASR receives the IP packet that source mobile terminal is sent, judgement itself is in mark net and the IP
When the destination address of message is located at mark net, increase RID conducts corresponding with source AID in the IP packet in the IP packet
RID heads, and the GRE head structures for increasing sign net access GRE networks become extension encapsulated message and are sent to described second
ASR；
2nd ASR receives the extension encapsulated message, judges that RID is corresponded in the RID heads of the extension encapsulated message
It, will be described when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message after local address
Extension encapsulated message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to destination mobile terminal.
Further, the above method can also have the characteristics that：
GRE networks are accessed using a bit sign net in default field in GRE described.
In order to solve the above technical problem, the present invention provides realize network interworking by expanding universal routed encapsulation technology
System, including source and target router, wherein
The source router increases in the IP packet after receiving IP packet and accesses mark in the IP packet
Know (AID) corresponding switching-routing identifier (RID) and be used as RID heads, and increases sign net access generic route encapsulation (GRE)
The GRE head structures of network become extension encapsulated message and are sent to destination router；
The destination router judges the RID heads of the extension encapsulated message after receiving the extension encapsulated message
After middle RID corresponds to local address, the GRE instructions for carrying mark net access GRE networks in the extension encapsulated message are judged
When, the extension encapsulated message is directly removed RID and GRE and obtains IP packet and forwards this IP packet.
Further, above system can also have the characteristics that：
The source router is ASR, and the destination router is ISR；
The ASR, after receiving the IP packet that mobile terminal is sent, judgement itself is in mark net and the IP is reported
When the destination address of text is located at public network, increase RID conducts corresponding with source AID in the IP packet in the IP packet
RID heads, and the GRE head structures for increasing sign net access GRE networks become extension encapsulated message and are sent to the ISR；
The ISR judges that RID is corresponded in the RID heads of the extension encapsulated message for receiving the extension encapsulated message
It, will be described when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message after local address
Extension encapsulated message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to public network.
Further, above system can also have the characteristics that：
The source router is ISR, and the destination router is ASR；
The ISR judges that the interface for receiving this IP packet is the public affairs of mark net after receiving IP packet from public network
Altogether when network side access interface, increase RID corresponding with purpose AID in the IP packet in IP packet as RID heads, and increase
The GRE head structures of sign net access GRE networks are added to become extension encapsulated message and be sent to ASR；
The ASR judges that RID is corresponded in the RID heads of the extension encapsulated message for receiving the extension encapsulated message
It, will be described when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message after local address
Extension encapsulated message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to mobile terminal.
Further, above system can also have the characteristics that：
The source router is the first ASR, and the destination router is the 2nd ASR；
First ASR, after receiving the IP packet that source mobile terminal is sent, judgement itself is in mark net and institute
When stating the destination address of IP packet positioned at mark net, increase RID corresponding with source AID in the IP packet in the IP packet
As RID heads, and the GRE head structures for increasing sign net access GRE networks become extension encapsulated message and are sent to described the
Two ASR；
2nd ASR judges RID in the RID heads of the extension encapsulated message for receiving the extension encapsulated message
It, will when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message after local address
The extension encapsulated message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to target movement eventually
End.
Further, above system can also have the characteristics that：
The source router, for accessing GRE nets using a bit sign net in default field in described GRE
Network.
In order to solve the above technical problem, the present invention provides a kind of access Switch Router (ASR), including receive mould
Block, extension process module, sending module；
The receiving module, for being sent to the extension process module after receiving IP packet；
The extension process module increases and the IP when for judging itself in mark net in the IP packet
The corresponding switching-routing identifier (RID) of source access mark (AID) is used as RID heads in message, and it is logical to increase the access of sign net
Become extension encapsulated message with the GRE head structures of routed encapsulation (GRE) network and is sent to the sending module；
The sending module, for the extension encapsulated message to be sent to next router.
Further, above-mentioned ASR can also have the characteristics that：
The receiving module is additionally operable to be sent to extension place after receiving the extension encapsulated message from a upper router
Manage module；
The extension process module, for judging that RID corresponds to local address in the RID heads for extending encapsulated message
Afterwards, when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message, the extension is encapsulated into report
Literary directly removal RID and GRE obtains IP packet and is sent to the sending module；
The sending module, for the IP packet received to be sent to message destination address.
Further, above-mentioned ASR can also have the characteristics that：
The extension process module, be also used for it is GRE described in default field a bit sign net connect
Enter GRE networks.
In order to solve the above technical problem, the present invention provides a kind of integrated service routers (ISR), including receive mould
Block, extension process module, sending module；
The receiving module, for being sent to the extension process module after receiving IP packet；
The extension process module increases and the IP when for judging itself in mark net in the IP packet
The corresponding switching-routing identifier (RID) of purpose access mark (AID) is used as RID heads in message, and increases the access of sign net
The GRE head structures of generic route encapsulation (GRE) network become extension encapsulated message and are sent to the sending module；
The sending module, for the extension encapsulated message to be sent to next router.
Further, above-mentioned ISR can also have the characteristics that：
The receiving module is additionally operable to be sent to extension place after receiving the extension encapsulated message from a upper router
Manage module；
The extension process module, for judging that RID corresponds to local address in the RID heads for extending encapsulated message
Afterwards, when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message, the extension is encapsulated into report
Literary directly removal RID and GRE obtains IP packet and is sent to the sending module；
The sending module, for the IP packet received to be sent to message destination address.
Further, above-mentioned ISR can also have the characteristics that：
The extension process module, be also used for it is GRE described in default field a bit sign net connect
Enter GRE networks.
The tunnel encapsulation mechanism of completely new extension GRE (generic route encapsulation) technology proposed by the present invention, can not pass through
Configuring GRE tunnel, convenient dynamic extension GRE protocol realize that the intercommunication of mark net and external the Internet, larger improving are set
Standby processing capacity.
The present invention is indicated in GRE " mark net access GRE networks " by extending existing GRE standards using a flag bit
Information, to realize that mark net and external network intercommunication, this method can greatly improve equipment disposal ability, as ASR,
ISR, ILR equipment do not need manual configuration gre tunneling, direct basis<AID, RID>Mapping item carries out tunnel encapsulation；Pass through
The GRE protocol of extension distinguishes the encapsulation in this present invention with general GRE encapsulation, can be with dynamic generation on ISR<
AID, RID>Mapping item can realize the user record only to dynamically reaching the standard grade by the mechanism on ISR<AID, RID>It reflects
Entry is penetrated, rather than it is all<AID, RID>Map entry is advertised to ISR by ILR；It is standby to existing GRE standards can be fine
Compatibility.
Description of the drawings
Fig. 1 is the encapsulation of GRE heads and the decapsulation schematic diagram that mark net is executed to being sent to the message of public network from mobile terminal；
Fig. 2 is the encapsulation of GRE heads and the decapsulation schematic diagram that mark net is executed to being sent to the message of mobile terminal from public network；
Fig. 3 is that the GRE encapsulation format of extension GRE protocol defines schematic diagram；
Fig. 4 is message encapsulation schematic diagram when exchanging visits between ASR in mark net.
Specific implementation mode
Include by the method that expanding universal routed encapsulation technology realizes network interworking：
When identifying progress message intercommunication between net and public network or identifying net built-in message intercommunication, source router receives IP reports
Wen Hou increases switching-routing identifier (RID) conduct corresponding with access mark (AID) in the IP packet in the IP packet
RID (RID refer to the addresses gre tunneling outer layer IP encapsulation RID), and increase sign net access generic route encapsulation
(GRE) the GRE head structures of network are sent to destination router as extension encapsulated message；
After the destination router receives the extension encapsulated message, RID in the RID heads of the extension encapsulated message is judged
It, will when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message after local address
The extension encapsulated message directly removes RID and GRE and obtains IP packet and forward this IP packet.
As shown in Figure 1, message is netted from mark when sending arrival public network, the source router of message is ASR, the message target
Router is ISR.
After the ASR receives the IP packet of mobile terminal transmission, judgement itself is in mark net and the IP packet
When destination address is located at public network, increase RID corresponding with source AID in the IP packet in the IP packet as RID
Head, and the GRE head structures for increasing sign net access GRE networks become extension encapsulated message and are sent to the ISR.
The ISR receives the extension encapsulated message, judges that RID corresponds to this in the RID heads of the extension encapsulated message
After way address, when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message, by the extension
Encapsulated message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to public network.
As shown in Fig. 2, when message is sent to knowledge net up to standard from public network, the message source router of message is ISR, described
Message destination router is ASR.
The ISR judges that the interface for receiving this IP packet is the public network of mark net after public network receives IP packet
When the access interface of network side, increase RID corresponding with purpose AID in the IP packet in IP packet as RID heads, and increase and refer to
The GRE head structures that net access GRE networks are known in indicating become extension encapsulated message and are sent to ASR.
The ASR receives the extension encapsulated message, judges that RID corresponds to this in the RID heads of the extension encapsulated message
After way address, when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message, by the extension
Encapsulated message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to mobile terminal.
As shown in figure 3, when message is sent inside mark net, the source router of message is the first access Switch Router
(ASR), the destination router of the message is the 2nd ASR.
After first ASR receives the IP packet that source mobile terminal is sent, judgement itself is in mark net and the IP
When the destination address of message is located at mark net, increase RID conducts corresponding with source AID in the IP packet in the IP packet
RID heads, and the GRE head structures for increasing sign net access GRE networks become extension encapsulated message and are sent to described second
ASR。
2nd ASR receives the extension encapsulated message, judges that RID is corresponded in the RID heads of the extension encapsulated message
It, will be described when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message after local address
Extension encapsulated message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to destination mobile terminal.
In the above method, as shown in figure 4, being indicated using a bit in default (Reserved0) field in GRE described
Mark net access GRE networks, i.e., by this bit position 1, then sign net accesses GRE networks, and existing when this home position 0
The mode that gre tunneling encapsulates in technology is identical, indicates that IP network accesses GRE networks.
The system for realizing network interworking by expanding universal routed encapsulation technology corresponding with the above method includes source routing
Device and destination router, the function of source and target router is identical as described in the above method, and details are not described herein again.
ASR routers and ISR routers include receiving module, extension process module, sending module in this system.
In the case that ASR routers are as source router：
Receiving module, for being sent to the extension process module after receiving IP packet；
Extension process module increases and the IP packet when for judging itself in mark net in the IP packet
The middle corresponding switching-routing identifier (RID) of source access mark (AID) is used as RID heads, and increases sign net and access general road
Extension encapsulated message is become by the GRE head structures of encapsulation (GRE) network and is sent to the sending module；
The sending module, for the extension encapsulated message to be sent to next router.
In the case that ISR routers are as source router：
Receiving module, for being sent to the extension process module after receiving IP packet；
Extension process module increases and the IP packet when for judging itself in mark net in the IP packet
The middle corresponding switching-routing identifier (RID) of purpose access mark (AID) is used as RID heads, and it is general to increase the access of sign net
The GRE head structures of routed encapsulation (GRE) network become extension encapsulated message and are sent to the sending module；
The sending module, for the extension encapsulated message to be sent to next router.
In the case that ASR routers or ISR routers are as destination router：
The receiving module is additionally operable to be sent to extension place after receiving the extension encapsulated message from a upper router
Manage module；
The extension process module, for judging that RID corresponds to local address in the RID heads for extending encapsulated message
Afterwards, when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message, the extension is encapsulated into report
Literary directly removal RID and GRE obtains IP packet and is sent to the sending module；
The sending module, for the IP packet received to be sent to message destination address.
In the ASR equipment of mobile terminal accessing external network, arrived according to the AID information direct indexs of mobile subscriber<
AID, RID>Mapping table carries out the encapsulation process of RID, in external network backhaul flow, it is no longer necessary to search the GRE's of system
Decapsulate table, direct basis<AID, RID>Mapping table carries out the decapsulation processing in tunnel, restores the AID information of internal layer, forwards
To mobile subscriber.Similarly, in the ISR equipment of mobile terminal accessing external network, direct basis<AID, RID>Mapping table into
The decapsulation in row tunnel is handled, and is restored the AID information of internal layer, is forwarded to external public network, in external network backhaul flow, root
It is arrived according to the AID information direct indexs of mobile subscriber<AID, RID>Mapping table carries out the encapsulation process of RID.This programme is used mobile
When the networking operation of family and external network, a kind of efficient and convenient encapsulation technology solution is provided.Meanwhile in mark net
This method can also be used to realize the intercommunication between ASR between internal ASR network elements, facilitate the message intercommunication inside mark net.
This programme is described in detail below by specific embodiment.
Mark net and public network intercommunication message method include：
Step 1, mobile terminal user needs to access public network application server, and mobile terminal sends number to the ASR of mark net
According to message, the source IP address of this message is user's AID information, and destination address is the AID information of public network application server；
Step 2, ASR is according to the mapping relations of AID and RID, on the basis of the IP packet encapsulation IP (wrapped in this IP
Include RID information corresponding with source IP address information), and it is GRE heads to increase the GRE encapsulation of mark net on the basis of IP packet, this
It will using one bit of default field (being customized for network type field) instruction " mark net access GRE networks " in GER
This bit is set as 1, and user data message is forwarded to ISR by the message after this extension encapsulation by the routing forwarding of outer layer IP
Equipment.
Step 3, ISR receives the message after this extension encapsulation, judges destination address to be local, the protocol number of IP packet is
GRE protocol further judges GRE Net the type fields at this time, if it is 0, enters the decapsulation of normal gre tunneling
Process flow decapsulates process flow if it is 1 into inlet identity net, and at this moment the RID of directly removal outer layer is encapsulated and GRE heads
Encapsulation directly obtains internal layer IP packet (purpose IP address is AID information) and is forwarded to public network；
Meanwhile ISR can further judge in decapsulating process flow<AID, RID>Whether mapping table has generated,
If do not generated, generate simultaneously<AID, RID>Mapping table.
Step 4, ISR is received after public network application server is sent to the IP packet of mobile terminal, judges the port for receiving message
Whether it is the public network side access interface for identifying net, if so, according to the target ip address in message, that is, target AID information searchings<
AID, RID>Mapping table；If searched successfully, increase the RID heads for indicating RID information corresponding with AID on the basis of this message,
And GRE encapsulation is carried out, the customized Net the type fields of GRE stems extend this as 1, are expressed as the internal tunnel of mark net；Root
It is sent to ASR according to outer layer IP address；
Step 5, after ASR receives this message, judge that Net the type fields is 1, directly removal RID and GRE heads in GRE
Internal layer message (destination IP is AID information) is E-Packeted to mobile terminal.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually arbitrary combination.
Certainly, the invention may also have other embodiments, without deviating from the spirit and substance of the present invention, ripe
Various corresponding change and deformations, but these corresponding change and deformations can be made according to the present invention by knowing those skilled in the art
The protection domain of appended claims of the invention should all be belonged to.
One of ordinary skill in the art will appreciate that all or part of step in the above method can be instructed by program
Related hardware is completed, and described program can be stored in computer readable storage medium, such as read-only memory, disk or CD
Deng.Optionally, all or part of step of above-described embodiment can also be realized using one or more integrated circuits.Accordingly
Ground, the form that hardware may be used in each module/unit in above-described embodiment are realized, the shape of software function module can also be used
Formula is realized.The present invention is not limited to the combinations of the hardware and software of any particular form.
Claims (12)
1. the method for realizing network interworking by expanding universal routed encapsulation technology, wherein
When identifying progress message intercommunication between net and public network or identifying net built-in message intercommunication, source router receives IP packet
Afterwards, increase in the IP packet and identify the corresponding switching-routing identifier RID of AID as RID heads with access in the IP packet,
And the GRE head structures for increasing sign net access generic route encapsulation GRE networks become extension encapsulated message and are sent to target
Router；
After the destination router receives the extension encapsulated message, judge that RID is corresponded in the RID heads of the extension encapsulated message
It, will be described when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message after local address
Extension encapsulated message directly removes RID and GRE and obtains IP packet and forward this IP packet；
GRE networks are accessed using a bit sign net in default field in GRE described.
2. the method for claim 1, wherein
When the message nets transmission arrival public network from mark, the source router of the message is access Switch Router ASR, described
Message destination router is integrated service router ISR；
After the ASR receives the IP packet of mobile terminal transmission, judgement itself is in the purpose of mark net and the IP packet
When address is located at public network, increase RID corresponding with source AID in the IP packet in the IP packet as RID heads, and
The GRE head structures for increasing sign net access GRE networks are sent to the ISR as extension encapsulated message；
The ISR receives the extension encapsulated message, judges that RID corresponds to locally in the RID heads of the extension encapsulated message
Behind location, when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message, the extension is encapsulated
Message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to public network.
3. the method for claim 1, wherein
When the message is sent to knowledge net up to standard from public network, the message source router of the message is integrated service router
ISR, the message destination router are access Switch Router ASR；
The ISR judges that the interface for receiving this IP packet is the public network side of mark net after public network receives IP packet
When access interface, increase RID corresponding with purpose AID in the IP packet in IP packet as RID heads, and increase indicateing arm
Knowing the GRE head structures of net access GRE networks becomes extension encapsulated message and is sent to ASR；
The ASR receives the extension encapsulated message, judges that RID corresponds to locally in the RID heads of the extension encapsulated message
Behind location, when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message, the extension is encapsulated
Message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to mobile terminal.
4. the method for claim 1, wherein
When the message is sent inside mark net, the source router of the message is the first access Switch Router ASR, described
The destination router of message is the 2nd ASR；
After first ASR receives the IP packet that source mobile terminal is sent, judgement itself is in mark net and the IP packet
Destination address when being located at mark net, increase RID corresponding with source AID in the IP packet in the IP packet as RID
Head, and the GRE head structures for increasing sign net access GRE networks become extension encapsulated message and are sent to the 2nd ASR；
2nd ASR receives the extension encapsulated message, judges that RID corresponds to this in the RID heads of the extension encapsulated message
After way address, when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message, by the extension
Encapsulated message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to destination mobile terminal.
5. the system that network interworking is realized by expanding universal routed encapsulation technology, including source and target router,
In,
The source router increases and access mark AID in the IP packet after receiving IP packet in the IP packet
Corresponding switching-routing identifier RID increases the GRE heads of sign net access generic route encapsulation GRE networks as RID heads
It is constructed to extension encapsulated message and is sent to destination router；
For use it is GRE described in default field a bit sign net access GRE networks；
The destination router, after receiving the extension encapsulated message, in the RID heads for judging the extension encapsulated message
After RID corresponds to local address, when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message,
The extension encapsulated message is directly removed RID and GRE to obtain IP packet and forward this IP packet.
6. system as claimed in claim 5, which is characterized in that
The source router is ASR, and the destination router is ISR；
The ASR, after the IP packet for receiving mobile terminal transmission, judgement itself is in mark net and the IP packet
When destination address is located at public network, increase RID corresponding with source AID in the IP packet in the IP packet as RID
Head, and the GRE head structures for increasing sign net access GRE networks become extension encapsulated message and are sent to the ISR；
The ISR judges that RID corresponds to this in the RID heads of the extension encapsulated message for receiving the extension encapsulated message
After way address, when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message, by the extension
Encapsulated message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to public network.
7. system as claimed in claim 5, which is characterized in that
The source router is ISR, and the destination router is ASR；
The ISR judges that the interface for receiving this IP packet is the public network of mark net after receiving IP packet from public network
When the access interface of network side, increase RID corresponding with purpose AID in the IP packet in IP packet as RID heads, and increase and refer to
The GRE head structures that net access GRE networks are known in indicating become extension encapsulated message and are sent to ASR；
The ASR judges that RID corresponds to this in the RID heads of the extension encapsulated message for receiving the extension encapsulated message
After way address, when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message, by the extension
Encapsulated message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to mobile terminal.
8. system as claimed in claim 5, which is characterized in that
The source router is the first ASR, and the destination router is the 2nd ASR；
First ASR, after receiving the IP packet that source mobile terminal is sent, judgement itself is in mark net and the IP
When the destination address of message is located at mark net, increase RID conducts corresponding with source AID in the IP packet in the IP packet
RID heads, and the GRE head structures for increasing sign net access GRE networks become extension encapsulated message and are sent to described second
ASR；
2nd ASR judges that RID is corresponded in the RID heads of the extension encapsulated message for receiving the extension encapsulated message
It, will be described when judging the instruction of GRE carrying mark net access GRE networks in the extension encapsulated message after local address
Extension encapsulated message directly removes RID and GRE and obtains IP packet and this IP packet is forwarded to destination mobile terminal.
9. a kind of access Switch Router ASR, wherein including receiving module, extension process module, sending module；
The receiving module, for being sent to the extension process module after receiving IP packet；
The extension process module increases and the IP packet when for judging itself in mark net in the IP packet
The middle source access mark corresponding switching-routing identifier RID of AID increase sign net and access general routing envelope as RID heads
The GRE head structures of dress GRE networks become extension encapsulated message and are sent to the sending module；
For use it is GRE described in default field a bit sign net access GRE networks；The sending module,
For the extension encapsulated message to be sent to next router.
10. access Switch Router as claimed in claim 9, which is characterized in that
The receiving module is additionally operable to be sent to the extension process mould after receiving the extension encapsulated message from a upper router
Block；
The extension process module is sentenced after judging that RID corresponds to local address in the RID heads for extending encapsulated message
It is in the disconnected extension encapsulated message when instruction of GRE carrying mark net access GRE networks, the extension encapsulated message is direct
Removal RID and GRE obtains IP packet and is sent to the sending module；
The sending module, for the IP packet received to be sent to message destination address.
11. a kind of integrated service router ISR, wherein including receiving module, extension process module, sending module；
The receiving module, for being sent to the extension process module after receiving IP packet；
The extension process module increases and the IP packet when for judging itself in mark net in the IP packet
The middle purpose access mark corresponding switching-routing identifier RID of AID increase sign net and access general routing as RID heads
The GRE head structures of encapsulation GRE networks become extension encapsulated message and are sent to the sending module；
For use it is GRE described in default field a bit sign net access GRE networks；The sending module,
For the extension encapsulated message to be sent to next router.
12. integrated service router as claimed in claim 11, which is characterized in that
The receiving module is additionally operable to be sent to the extension process mould after receiving the extension encapsulated message from a upper router
Block；
The extension process module is sentenced after judging that RID corresponds to local address in the RID heads for extending encapsulated message
It is in the disconnected extension encapsulated message when instruction of GRE carrying mark net access GRE networks, the extension encapsulated message is direct
Removal RID and GRE obtains IP packet and is sent to the sending module；
The sending module, for the IP packet received to be sent to message destination address.
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| CN201210051142.1A CN103166825B (en) | 2011-12-16 | 2012-03-01 | The method and system of network interworking is realized by expanding universal routed encapsulation technology |
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| CN110752979B (en) * | 2019-10-30 | 2021-09-17 | 迈普通信技术股份有限公司 | Tunnel transmission method, device and network equipment of message |
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| CN102025606A (en) * | 2009-09-23 | 2011-04-20 | 中兴通讯股份有限公司 | Data transmission method and system |
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| CN102025600A (en) * | 2009-09-17 | 2011-04-20 | 中兴通讯股份有限公司 | Method, system and router for transmitting and receiving data |
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