CN103731348B - A kind of IMS network message distribution method and device - Google Patents
A kind of IMS network message distribution method and device Download PDFInfo
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- CN103731348B CN103731348B CN201210390771.7A CN201210390771A CN103731348B CN 103731348 B CN103731348 B CN 103731348B CN 201210390771 A CN201210390771 A CN 201210390771A CN 103731348 B CN103731348 B CN 103731348B
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Abstract
The present invention provides a kind of IMS network message distribution method and device, the method includes：When SBC receives message information, according to pre-set VPN and the correspondence of own interfaces, the VPN for corresponding to the interface for receiving the message information is searched；According to the address mapping relation in the VPN, the message information is distributed.The present invention by SBC by the way that interface is isolated in pre-set difference VPN, in different VPN, allow IP address identical, the network that SBC can use heterogeneous networks interface link address to be overlapped has been achieved, the connection of access net side or core-network side connection can be distinguished, even if there may be overlappings for the IP address that access net side and core-network side use, still the message that access side receives will not be forwarded back to access side again, ensure the normal routing of user's calling with this.
Description
Technical field
The present invention relates to message distribution technology in core network service more particularly to a kind of IP multimedia subsystem
(IPMultimedia Subsystem, IMS) network message distribution method and device.
Background technology
Target architecture of the IMS network as core net evolution, business are flexible, quick with the framework detached is controlled to be conducive to
Offer various businesses application, more conducively integrated services；A variety of fixation/movement access sides are supported in the carrying of IMS network IP-based
The fusion of formula, provides convenience for full-service operation.
The networking of existing IMS network as shown in Figure 1, pass through the IP dedicated bearers net of core-network side and access side metropolitan area respectively
Net CMNET is carried；Wherein, IP dedicated bearers net is responsible for communicating between IMS core network element, is operator's dedicated bearer net, with
External the Internet is strictly isolated, to ensure attack of the IMS core network element device from external the Internet；CMNET is used to carry IMS
User is from linking Internet Session Border Controller (Session Border Controller, SBC) and moves IMS (CM-
IMS) user accesses application server (Application Server, AS).
SBC is network element of the IMS network edge for IP accesses, intercommunication and safeguard protection, is present in access network and IMS nets
It is the entrance that user accesses IMS between network and different IMS network.Since SBC accesses two bearer networks simultaneously, SBC
The address of the IP dedicated bearer nets of the upper IP address that access net side CMNET need to be configured simultaneously and IMS core net side, in IMS network
In, SBC is directly docked, SBC is as back-to-back user agent (Back- as access device with CMNET/IP dedicated bearer nets
To-BackUser Agent, B2BUA), the signaling for terminating access net side CMNET is connected with media, and in core-network side
IP dedicated bearers distribute new IP address on the net and port is established new signaling and connected with media；SBC is using simple straight at present
It connects and carries out routing forwarding using IP address, result in access side and network side occurs that access side or network occurs during IP address overlapping
Side routing forwarding mistake can directly result in the call failure of user.
Specifically, occur the failure of certain customers' call failure or single-pass successively in IMS process of user calling,
In, it is normal by location finding signaling when there is single-pass phenomenon when certain districts and cities is in the IMS numbers for dialing other provinces direction, but
It is that Media Stream can not be established normally, according to normal call flow, IMS calls transprovincially are carried by IP dedicated bearer nets, if
IP dedicated bearers carry the IP address sections of IMS plans of operation as 10.184.76.0-10.184.99.0 on the net, but inside the province
The address field is planned again to the sided access network element terminal use of another districts and cities in CMNET nets, may result in the address on SBC
CMNET rather than IP dedicated bearer nets have been directed toward in the routing of section, therefore will appear calling single-pass phenomenon.Lead to the main of the failure
The reason is that：There is overlapping in the IP address that access side CMNET nets and core-network side IP dedicated bearer nets use, cause SBC should
The routing mistake to IP bearer networks is sent to send to the CMNET nets of same IP address.
For the IP in IMS network environment, used due to access side CMNET nets and core-network side IP dedicated bearer network sides
Address has that overlapping leads to user's call failure, can avoid the carrying of access net side by planning IP address section again
Net and the bearer network of core-network side are avoided in IMS business using identical IP address, however this method can only found
It is solved after problem, and since the IP address of CMNET can voluntarily be distributed by each province, IP dedicated bearer net address is in operator
Distribute unitedly in network, therefore, IP address assigning process do not ensure that inside the province the IP address of CMNET with other provinces IP is special holds
Centainly there is no conflicts for the IP address of contained network.
The existing IP address conflict by distributing IP address to avoid between IP dedicated bearers net and CMNET can not only limit
Network ip address processed efficiently uses, and changes the IP address for having that user uses in network, during IP address modification
It is related to the data modification of the equipment such as related network elements in bearer network, router, user terminal, data modification amount and risk are big,
And IP address modification during will influence user normal communication, user perceive it is poor.
Invention content
In view of this, it is a primary object of the present invention to provide a kind of IMS network message distribution method and device, Neng Gouti
The success rate of high IMS messages distribution, improves IMS service quality.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of IP multimedia subsystem (IMS) network message distribution method, the method includes：
When Session Border Controller (SBC) receives message information, according to pre-set virtual LAN (VPN) and certainly
The correspondence of body interface searches the VPN for corresponding to the interface for receiving the message information；
According to the address mapping relation in the VPN, the message information is distributed.
Further, the method further includes：
The Route Distinguisher of VPN and the interface of the SBC are bound.
Correspondingly, the SBC is searched according to pre-set VPN and the correspondence of own interfaces and is corresponded to reception institute
The VPN for stating the interface of message information is：
The SBC is searched according to the Route Distinguisher of VPN and the correspondence of own interfaces and is corresponded to the reception message letter
The VPN of the interface of breath.
Wherein, the VPN include access net side VPN, core-network side signaling VPN, one kind in core-network side media VPN or
It is a variety of.
Wherein, the address mapping relation in the VPN, the message information is distributed for：
Preset static routing table in the VPN is searched, IP address is occurred what is be overlapped in access net side and core-network side
Message information is distributed.
Wherein, the address mapping relation in the VPN, the message information is distributed for：
Preset Interworking gateway mapping group in the VPN is searched, IP address is not occurred in access net side and core-network side
The message information of overlapping is distributed.
A kind of IMS network message diostribution device, described device include：VPN searching units, Dispatching Unit；Wherein,
The VPN searching units, during for receiving message information, according to pre-set VPN and pair of own interfaces
It should be related to, search the VPN for corresponding to the interface for receiving the message information；
The Dispatching Unit for the address mapping relation in the VPN, is distributed the message information.
Further, described device further includes：Binding unit, for the Route Distinguisher of VPN to be bound with interface；
Correspondingly, the VPN searching units specifically for the Route Distinguisher and the correspondence of interface according to VPN, are searched
Corresponding to the VPN for the interface for receiving the message information.
Wherein, the VPN include access net side VPN, core-network side signaling VPN, one kind in core-network side media VPN or
It is a variety of.
Wherein, specifically for searching preset static routing table in the VPN, IP address is being connect for the Dispatching Unit
Enter the message information that being overlapped occur in net side and core-network side to be distributed.
Wherein, the Dispatching Unit, specifically for searching preset Interworking gateway mapping group in the VPN, by IP address
It is distributed in the message information that being overlapped do not occur in access net side and core-network side.
Interface is isolated to pre-set by IMS network message distribution method provided by the present invention and device on SBC
In different VPN, in different VPN, allow IP address identical, in this way, can be achieved with SBC uses heterogeneous networks interface connection ground
The network of location overlapping can distinguish the connection of access net side or core-network side connection, even if access net side and core-network side make
IP address still will not will access the message that side receives and be forwarded back to access side again there may be overlapping, ensure to use with this
The normal routing of family calling so as to improve the success rate of IMS messages distribution, improves IMS service quality.
Description of the drawings
Fig. 1 is existing IMS network networking structure schematic diagram；
Fig. 2 is the realization flow diagram of IMS network message distribution method of the present invention；
Fig. 3 is the change schematic diagram of IP address in IMS network message distribution method embodiment of the present invention；
Fig. 4 is the structure diagram of IMS network message diostribution device of the present invention.
Specific embodiment
The present invention basic thought be：Physical interface/sub-interface of SBC is isolated to different virtual LAN (Virtual
Private Network, VPN) in, in different VPN, allow IP address identical, distinguish ground in this way, being realized by different VPN
The different user of location overlapping；Wherein, the sub-interface is logical concept, and a physical interface can include multiple sub-interfaces.
Here, each VPN have oneself routing table and address resolution protocol (Address ResolutionProtocol,
ARP) list item, after SBC receives message, VPN that can be according to belonging to interface is the corresponding VPN label of interface flag, which determines
Determine the routing of message and ARP addressing.The function of being passed through between specified VPN by providing signaling and media, SBC is as multiple networks
Convergence point, realize by the signaling of terminal, media and management message be distributed in corresponding network.
It is the connection of access side or network side connection since SBC can distinguish the connection received, in this way, even if access side
With the IP address that network side uses there may be overlapping, the message information that access net side receives will not be forwarded tieback again by SBC
Enter net side, and then improve the service quality of IMS network.
To make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples and with reference to attached drawing, it is right
The present invention is further described.
Fig. 2 shows the realization flow of IMS network message distribution method of the present invention, as shown in Fig. 2, the method includes under
State step：
Step 201, it when SBC receives message information, according to pre-set VPN and the correspondence of own interfaces, looks into
Look for the VPN corresponding to the interface for receiving the message information；
Specifically, when SBC receives message information, according to the Route Distinguisher of pre-set VPN and pair of own interfaces
It should be related to, search the VPN for corresponding to the interface for receiving the message information, wherein, the VPN includes access net side VPN, core
Net side signaling VPN, core-network side media VPN it is one or more, each VPN tool is there are one Route Distinguisher, and each routing mark
Knowledge differs mutually；
Further, before this step, the method further includes：By the interface of the Route Distinguisher of VPN and the SBC into
Row binding；Specifically, the corresponding Route Distinguisher of net side VPN will be accessed to tie up with receiving the interface of access net side message information
It is fixed；The corresponding Route Distinguisher of core-network side signaling VPN is bound with receiving the interface of core-network side signaling；By core-network side
The corresponding Route Distinguisher of media VPN is bound with receiving the interface of core-network side media message information.
Step 202, the address mapping relation in the VPN is distributed the message information；
Specifically, the SBC searches preset static routing table in the VPN, by IP address in access net side and core
The message information that being overlapped occurs in net side is distributed；Alternatively, preset Interworking gateway mapping group in the VPN is searched, by IP
Location is distributed in the message information that being overlapped do not occur in access net side and core-network side.
The above method is described in detail below by a specific embodiment, it is specifically, a certain for access net side
Port is received in the access net side message identical with core-network side IP address section, and SBC binds VPN on access net side port
Mark 1, core-network side is not made an amendment.
With reference to figure 3, as shown in Figure 3：User A initiates calling, and the address for locally reporting the medium surface of access net side is
10.1.1.1:9002, after the access interface by SBC, since the VPN marks of access interface binding are 1, pass through the end
After mouthful, after the VPN marks that the address of former medium surface is combined to access interface binding, the address of former medium surface becomes
10.1.1.1+1:9002, the address mapping relation in VPN, the access net side media address is mapped on SBC
211.139.96.188+1:9832, SBC access net side media are mapped to 10.184.99.10 in core-network side media:3868, such as
This, the message information of the user is to pass through 10.184.99.10:3868 communicate with other addresses of core-network side medium surface
's.
Fig. 4 shows the structure of IMS network message diostribution device of the present invention, as shown in figure 4, described device includes：VPN is looked into
Look for unit, Dispatching Unit；Wherein,
The VPN searching units, during for receiving message information, according to pre-set VPN and pair of own interfaces
It should be related to, search the VPN for corresponding to the interface for receiving the message information；
The Dispatching Unit for the address mapping relation in the VPN, is distributed the message information.
Further, described device further includes：Binding unit, for the Route Distinguisher of VPN to be bound with interface；
Correspondingly, the VPN searching units specifically for the Route Distinguisher and the correspondence of interface according to VPN, are searched
Corresponding to the VPN for the interface for receiving the message information.
Wherein, the VPN includes one kind or more of access net side VPN, core-network side signaling VPN, core-network side media VPN
Kind.
Wherein, specifically for searching preset static routing table in the VPN, IP address is being connect for the Dispatching Unit
Enter the message information that being overlapped occur in net side and core-network side to be distributed.
Wherein, the Dispatching Unit, specifically for searching preset Interworking gateway mapping group in the VPN, by IP address
It is distributed in the message information that being overlapped do not occur in access net side and core-network side.
In conclusion of the invention by the way that interface is isolated in pre-set difference VPN on SBC, different VPN
In, allow IP address identical, thereby realize the network that SBC can use heterogeneous networks interface link address to be overlapped, it can
Differentiation is the connection of access net side or core-network side connection, though access net side and the IP address that uses of core-network side there may be
The message that access side receives still will not be forwarded back to access side again, be ensured the normal routing of user's calling with this by overlapping.This
Invention fundamentally solves address overlap collision problem in IMS network；And it is small with office data workload, it is easy to implement,
Be conducive to improve bearer network IP address resource pool service efficiency；To customer impact, small, user perceives.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (10)
1. a kind of IP multimedia subsystem IMS network message distribution method, which is characterized in that by Session Border Controller SBC's
Physical interface/sub-interface is isolated in different virtual LAN VPN, allows IP address identical in different VPN；The method is also wrapped
It includes：
When SBC receives message information, according to pre-set VPN and the correspondence of own interfaces, search and correspond to reception
The VPN of the interface of the message information；
According to the address mapping relation in the VPN, the message information is distributed, work(is passed through between the specified VPN of realization
Energy；Wherein, each VPN has the routing table and items of address analyzing protocol table of oneself.
2. according to the method described in claim 1, it is characterized in that, the method further includes：
The Route Distinguisher of VPN and the interface of the SBC are bound；
Correspondingly, the SBC is searched according to pre-set VPN and the correspondence of own interfaces and is corresponded to the reception report
The VPN of the interface of literary information is：
The SBC is searched according to the Route Distinguisher of VPN and the correspondence of own interfaces and is corresponded to the reception message information
The VPN of interface.
3. according to the method described in claim 1, it is characterized in that, the VPN includes access net side VPN, core-network side signaling
It is one or more in VPN, core-network side media VPN.
4. method according to any one of claims 1 to 3, which is characterized in that the address of cache in the VPN
Relationship, the message information is distributed for：
Preset static routing table in the VPN is searched, IP address the message being overlapped is occurred into access net side and core-network side
Information is distributed.
5. method according to any one of claims 1 to 3, which is characterized in that the address of cache in the VPN
Relationship, the message information is distributed for：
Preset Interworking gateway mapping group in the VPN is searched, IP address is not overlapped in access net side and core-network side
Message information be distributed.
6. a kind of IMS network message diostribution device, which is characterized in that described device includes：VPN searching units, Dispatching Unit；Its
In,
The VPN searching units during for receiving message information, are closed according to pre-set VPN is corresponding with the interface of SBC
The VPN for corresponding to the interface for receiving the message information searches in system；Wherein, the interface of the SBC is physical interface/son of SBC
Interface, physical interface/sub-interface of the SBC are isolated in different VPN, allow IP address identical in different VPN；
The Dispatching Unit for the address mapping relation in the VPN, is distributed the message information, with reality
Now function is passed through between specified VPN；Wherein, each VPN has the routing table and items of address analyzing protocol table of oneself.
7. device according to claim 6, which is characterized in that described device further includes：Binding unit, for by VPN's
Route Distinguisher is bound with interface；
Correspondingly, the VPN searching units specifically for the Route Distinguisher and the correspondence of interface according to VPN, are searched and are corresponded to
In the VPN for the interface for receiving the message information.
8. device according to claim 6, which is characterized in that the VPN includes access net side VPN, core-network side signaling
It is one or more in VPN, core-network side media VPN.
9. according to claim 6 to 8 any one of them device, which is characterized in that the Dispatching Unit, specifically for searching institute
Preset static routing table in VPN is stated, IP address is divided in the message information that being overlapped occur in access net side and core-network side
Hair.
10. according to claim 6 to 8 any one of them device, which is characterized in that the Dispatching Unit, specifically for searching
IP address is not occurred the message being overlapped letter by preset Interworking gateway mapping group in the VPN in access net side and core-network side
Breath is distributed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100571197C (en) * | 2005-11-03 | 2009-12-16 | 中兴通讯股份有限公司 | A kind of provider's edge device and using method thereof of combining network address conversion |
| US8169903B2 (en) * | 2006-03-07 | 2012-05-01 | Cisco Technology, Inc. | Managing traffic within and between virtual private networks when using a session border controller |
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Patent Citations (4)
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|---|---|---|---|---|
| CN1697445A (en) * | 2004-05-12 | 2005-11-16 | 华为技术有限公司 | Implementation method for transferring data in virtual private network |
| CN101345711A (en) * | 2008-08-13 | 2009-01-14 | 成都市华为赛门铁克科技有限公司 | Packet processing method, fire wall equipment and network security system |
| CN101431440A (en) * | 2008-11-28 | 2009-05-13 | 杭州华三通信技术有限公司 | Flux monitoring method and apparatus |
| CN101582830A (en) * | 2009-06-22 | 2009-11-18 | 杭州华三通信技术有限公司 | Device for realizing mutual access of crossing virtual private networks and method |
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