CN101146068A - Private network user and system and method for network intercommunication with QoS network - Google Patents
Private network user and system and method for network intercommunication with QoS network Download PDFInfo
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Abstract
The invention relates to a system and a method of intercommunication between private network users and business service quality guarantee network. The invention has the core that: in independent bearing control layer network, a bearing control layer entity and an application entity can acquire corresponding address (port) conversion information by an address conversion gateway NAPT-GW; and then, allocate resources for the private users correctly based on the address (port) conversion information. Therefore, the realization of the invention can facilitate all function entities to correctly process the delivery and conversion of the private addresses and reach the purpose of correct addressing and resources allocation, in order to effectively solve the problems of difficulty of correct end to end QoS resources allocation of the private network addresses used by users and no guarantee for end to end business QoS.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to a kind of private user and the system and method that guarantees the QoS network interworking.
Background technology
Along with the continuous increase of Internet (the Internet) scale, various network services are fallen over each other to emerge in large numbers, and advanced multimedia system emerges in an endless stream.Because real time business is comparatively responsive to characteristics such as network transfer delay, delay jitters, when sudden high FTP (file transfer protocol (FTP)) being arranged on the network or contain the business such as HTTP (HTML (Hypertext Markup Language)) of image file, real time business will be subjected to very big influence; On the other hand, multimedia service a large amount of bandwidth that accounted for, like this, the key business that existing network will guarantee just is difficult to be transmitted reliably.
Based on above-mentioned present situation, various QoS (service quality) technology is arisen at the historic moment.IETF has advised a lot of service models and mechanism, to satisfy the demand of QoS.What industry was relatively approved at present is to use integrated service model (Int-Serv) at the access and the edge of network, uses differentiated service model (Diff-serv) at server.
Because differentiated service model (Diff-serv) ensures that the QoS measure has the high characteristics of line efficiency though only set priority level, concrete effect is difficult to prediction.Therefore, industry begins to introduce an independently bearer control layer for backbone network differentiated service Diff-Serv, set up the special Diff-Serv qos signaling mechanism of a cover, as in order to promote the application of Diff-Serv, on the common QBone try net that promotes of IETF and some manufacturers and research institution, utilized bandwidth proxy server (Bandwidth Broker) model is realized Internet resources and Topology Management, has some other manufacturer to propose similar QoS server/explorer technology and manages topological resource and coordinate the QoS ability in each differentiated service Diff-Serv zone.
Said method is Differentiated Services Diff-Serv network and sets up a resource management layer specially, the topological resource of supervising the network, because traditional Diff-Serv definition has limitation, obscure in order not cause, we rename as the have independent bearing control layer network model of (or pooling of resources key-course) with above-mentioned resource management Differentiated Services Diff-Serv model.
As shown in Figure 1, in the network model of bearer control layer is independently arranged, bearer network Control Server (comprising bandwidth broker device (Bandwidth Broker) or QoS server/explorer) has disposed rule and network topology, is client's service bandwidth application Resources allocation.The bearer network Control Server of each management domain transmits client's service bandwidth application request and result each other by signaling, and load network resource manager is the routing information of professional application distribution etc.
When the service bandwidth application of bearer control layer process user, will determine the path of customer service.Load network resource manager can notify edge router to transmit Business Stream according to the path of appointment.
How bearer network realizes that according to the definite path of bearer control layer user traffic flow is by specifying routing forwarding, the existing technology of industry mainly is to utilize the MPLS technology at present, use the resource reservation mode to set up LSP, use the explicit route mechanism of RSVP-TE or CR-LDP to set up LSP end to end along the service flow path of bearer control layer appointment.
Above-mentioned implementation can the professional required end-to-end QoS of strict guarantee.Yet, do not consider when IP address is privately owned address, how to realize that QoS guarantees end to end in the such scheme.And, in the real network application process,, all adopt the mode of dynamic address allocation to distribute private net address in a lot of networks to the user because the IPv4 address number is limited.
When private user and external user are mutual usually, need by the network address (port) translation function with corresponding private net address convert to public network address again with the external user intercommunication, the described network address (port) translation function is implemented in the gateway of bearing bed usually, make bearer control layer entity and application layer entity can't know address translation process, the consequence of bringing thus is that cause can not correct addressing and can't finish professional QoS resource allocation.
As can be seen, for above-mentioned reasons, at present, for the private user that only has been assigned with private net address can't with guarantee the QoS network interworking, to guarantee service quality end to end.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of private user and the system and method that guarantees the QoS network interworking, make only be assigned with private net address private user can with the network interworking that guarantees QoS, thereby realize that QoS guarantees end to end.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of private user and the system that guarantees the QoS network interworking, comprise private network, guarantee the network and the address conversion gateway of QoS, information mutual between the network of described private network and assurance QoS is undertaken sending in the network of opposite end after address transition is handled by address conversion gateway.
Described address conversion gateway can independently be provided with, and also can be arranged to guarantee in the QoS network of network entity.
Described private user is direct or by using or traffic border controlled function entity in address conversion gateway and the assurance QoS network, perhaps strategy determines function PDF/ bearer control function BCF connection.
The present invention also provides a kind of private user and the method that guarantees the QoS network interworking based on said system, comprising:
When carrying out information interaction between private network and assurance QoS network, described information is carried out sending to the opposite end network after address transition is handled.
When the private user initial request messages, method of the present invention specifically comprises:
A, private user are to guaranteeing that the QoS network sends business information;
After entity in B, the assurance QoS network is received described service requesting information, obtain the public network address information of private user to the address conversion gateway application;
C, utilize described public network address information set up with the opposite end between be connected, and carry out information interaction based on described being connected between private user and the opposite end of protecting in the QoS network.
Described steps A comprises:
Application or the traffic border controlled function entity of private user in the network that guarantees service quality sends the business information that comprises caller ID information.
Described step B comprises:
Use or information that traffic border controlled function entity is sent according to private user in the identity information that carries determine that its address information is a private net address;
Use or traffic border controlled function entity be this private user application public network address to address conversion gateway, and be that private user distributes corresponding public network address, turn back to application or traffic border controlled function entity by address conversion gateway.
Described step B comprises:
Use or information that traffic border controlled function entity is sent according to private user in the identity information that carries determine that its address information is a private net address;
Application or traffic border controlled function entity are initiated application public network address request message to strategy decision function PDF/ bearer control function BCF;
Described PDF/BCF is this private user application public network address to address conversion gateway, and is that private user distributes corresponding public network address by address conversion gateway, turns back to PDF/BCF;
The PDF/BCF continuation is back to described public network address on application or the traffic border controlled function entity and preserves, or preserves on PDF/BCF.
Described step C also comprises:
On PDF/BCF, utilize corresponding private net address to be private user application private network resource, utilize corresponding public network address to be private user application public network resource.
Described step B also comprises:
Application or traffic border controlled function entity carry the private net address of private user and directly or by PDF/BCF initiate the request of application public network address to address conversion gateway;
Address conversion gateway distributes corresponding public network address for each private net address, and corresponding private net address and public network address relation information are back to application or traffic border controlled function entity;
Perhaps,
Application or traffic border controlled function entity carry its public network address number that needs and directly or by PDF/BCF initiate the request of application public network address to address conversion gateway, and obtain one group of public network address that address conversion gateway returns;
Application or traffic border controlled function entity need be set up the corresponding relation of each private net address and public network address, and when needed this corresponding relation are sent to address conversion gateway as media flow transmission.
Described step C comprises:
Use or traffic border controlled function entity is preserved the corresponding relation of the public network address of the privately owned address of this private user and distribution, and utilize described public network address information and opposite end to connect;
Based on carrying out information interaction between the described opposite end that is connected in private user and the protection QoS network.
Described step C comprises:
Application or traffic border controlled function entity are initiated business request information with the privately owned address of private user to PDF/BCF;
Described PDF/BCF determines the public network address that private user is corresponding according to the privately owned address of preserving with the corresponding relation of the public network address of distribution, and utilizes described public network address information and opposite end to connect;
Based on carrying out information interaction between the described opposite end that is connected in private user and the protection QoS network.
As seen from the above technical solution provided by the invention, the invention solves and in the network that adopts the independent bearing control layer entity, handle user and external network and distribute the QoS problem of resource alternately with private net address, thereby can realize internetwork intercommunication easily, expand the ability of network-adaptive business.
That is to say that realization of the present invention makes that corresponding bearer control layer entity and application layer entity can obtain the corresponding relation of private net address and public network address in the network with independent bearing control layer, thereby can distribute corresponding public network resource for private user.
Description of drawings
The schematic network structure that Fig. 1 uses for the present invention;
Fig. 2 is the processing procedure schematic diagram 1 of the method for the invention;
Fig. 3 is the processing procedure schematic diagram 2 of the method for the invention;
Fig. 4 is the application networking schematic diagram of the method for the invention.
Embodiment
The network that is guaranteeing service quality, promptly have in the network of independent bearing control layer, qos signaling waits in each functional entity mutual at AF (application function), PDF (strategy decision function), BCF (bearer control function) and TPF (carrying transfer function), thereby guarantees professional service quality.
It all is public network address that the service conversation Media Stream address of transmitting during signaling connects between each functional entity at present is defaulted as, and does not consider the situation that private net address exists.
Core of the present invention is to make bearer control layer entity and application layer entity obtain address (port) transitional information in the independent bearing control layer network, so that it realizes correct resource allocation function.That is to say that main purpose of the present invention is to make each functional entity can correctly handle the transmission and the conversion of privately owned address, reaches the purpose of correct addressing, Resources allocation.Thereby solved as the user and used private net address, can't correctly finish QoS resource allocation end to end, can't guarantee the problem of teleservice QoS.
The invention provides in the network with independent bearing control layer (being called for short the BCF network) when the needs network address (port) conversion NA (P) T, application function AF, strategy decision function PDF, how functional entitys such as bearer control function BCF and carrying transfer function TPF realize the method for respective handling.
In Fig. 1, strategy decision function PDF and bearer control function BCF can also can (link to each other with AF by PDF as BCF) in different physical entities in same physical entity, also can have only a kind of logic form to exist in certain section network.
Understand for the present invention being had further, the specific implementation of method of the present invention is described in further detail below in conjunction with Fig. 2 and Fig. 3.
Usually, the user is initiated to the identity information that includes calling and called in the signaling message of application function AF, described signaling message can be SIP INVITE (session initiation protocol application) message etc., and the identity information of described calling and called can be domain name, address, port information etc.; AF such as traffic border control SBC function, soft switch, P-CSCF can parse address information wherein.When corresponding address (as calling address) when being privately owned address, then bearer control function PDF/BCF need carry out corresponding address transition and handles, to guarantee the normal mutual of information between AF.
The invention provides two kinds is that corresponding address transition under the situation of privately owned address is handled at calling address, will describe respectively below.
Wherein, a kind of implementation method specifically may further comprise the steps as shown in Figure 2:
Step 21:AF sends the request of application public network address to the NAPT gateway;
Step 22:NAPT gateway receives the request back and distributes corresponding public network address and return to AF for it;
In step 21 and step 22, AF does not pass through PDF/BCF, but directly asks and specify the private network-public network address corresponding relation of respective session Media Stream alternately to the gateway NAPT-GW (as TPF/ER among Fig. 1 or media gateway etc.) with the network address (port) conversion NA (P) T function;
Step 23:AF initiates the QoS resource request to PDF/BCF after receiving described public network address information, and at this moment, the Media Stream address that need carry is the public network address of distributing;
It is mutual that step 24:PDF/BCF directly utilizes corresponding public network address to carry out qos signaling end to end, carries out corresponding resource allocation, is public network address owing to what obtain, so PDF/BCF does not need to do any operation bidirectional;
Step 25:PDF/BCF returns resource allocation result information to AF.
As shown in Figure 2, AF just can transmit user's INVITE to opposite end AF based on described public network address after getting access to the public network address that the NAPT gateway distributes, and by the opposite end to local terminal AF echo reply message, and carry consultation parameter.
The address transition processing procedure of Calling Side has only been described in Fig. 2, similar for the address transition processing procedure and the Calling Side of the callee side that is arranged in private network equally, so no longer describe in detail.
In Fig. 2, NAPT gateway NAPT-GW distributes the public network address process can adopt two kinds of concrete implementations as required:
(1) return behind the corresponding relation of definite good private network-public network address in the NAPT gateway, AF directly uses by this corresponding relation and gets final product;
(2) in AF application public network address message, only have the number that needs public network address, the NAPT gateway returns the public network address of corresponding number to AF, and determine the corresponding relation of private network-public network address, and when needed this corresponding relation is sent to the NAPT gateway as media flow transmission by AF.
Another kind of address transition processing procedure specifically may further comprise the steps as shown in Figure 3:
Step 31:AF sends the request message of application public network address to PDF/BCF;
After step 32:PDF/BCF receives described application public network address request message, send application public network address request message to the NATP gateway;
Step 33:NAPT gateway will distribute corresponding public network address for it, and return to PDF/BCF after receiving described application public network address request message;
Step 34:PDF/BCF returns to AF with the public network address that obtains again;
To step 34, AF asks to the gateway NAPT-GW with the network address (port) conversion NA (P) T function alternately by PDF/BCF, and specifies the private network-public network address corresponding relation of respective session Media Stream in step 31;
Follow-up processing procedure, identical with the processing procedure among Fig. 2, promptly initiate the QoS resource request to PDF/BCF, the Media Stream address of carrying is the public network address of distributing, and, when PDF/BCF only with private network when mutual, it also can be private net address that AF passes the address information of coming by request QoS message related to resources, then, determine the public network address information corresponding by PDF/BCF according to private net address with it, and it is mutual directly to utilize this public network address to carry out qos signaling end to end, determines resource allocation result, also needs simultaneously resource allocation result is returned to AF; Whether carrying public network address in the request QoS message related to resources that AF sends is determined as required by AF;
In Fig. 3, the address corresponding relation of PDF/BCF except between needs transmission AF and NAPT-GW, do not need to do other extra process.
Equally, in Fig. 3, only described the processing procedure of Calling Side, the processing procedure of callee side is similar with it, no longer describes in detail.
In Fig. 3, private network-public network address corresponding relation determine that dual mode is arranged equally: a kind of is by the decision of NAPT gateway, and another kind is by the AF decision, does not repeat them here;
The implementation method that provides for Fig. 3, need to prove: in the corresponding relation process of definite address, the address corresponding relation that is transmitted all will be through the PDF/BCF that links to each other with NAPT-GW, and can be obtained by PDF/BCF, therefore, described address corresponding relation also can be stored on the PDF/BCF, and the message of sending as AF is carried when being private net address, then on PDF/BCF, determine its corresponding public network address, and handle accordingly based on described public network address.
Among the present invention, because certain PDF/BCF may need with equipment in private net address and certain private network mutual in the network, also may need to issue policy informations such as stream mapping to certain edge or relaying/edge device, perhaps also may need to transmit private network-public network address corresponding relation to other PDF/BCF, and realize the public network address that needs that these functions have, what have needs private net address, therefore, need write down private network-public network address corresponding relation on PDF/BCF.Just can carry out various processing according to described private network-public network address corresponding relation, as adopting public network address and public network equipment mutual, adopt the interior equipment of private net address and private network mutual, or the like.
The present invention is in concrete application process, the calling and called both sides can be simultaneously a certain with in above-mentioned two kinds of NA (P) T processing method, also can adopt different processing methods respectively, any main definite in the concrete respectively employing of calling and called side according to networking mode and Carrier Requirements.
In Fig. 4, provided a kind of networking structure of the present invention and used, as shown in Figure 4, wherein, PDF and BCF are arranged in the network as the physical entity that separates, and PDF and the AF of this moment can merge into same physical entity; NA (P) T-GW that independently is provided with or is arranged among the BCF can be divided into bearer network private network and public network two parts.Need write down private network-public network address corresponding relation that AF determines at PDF, when PDF need apply for the private network resource for AF, then the bearer control function A-BCF of private net address in private network with AF applied for resource; When needs were applied for the public network resource for AF, then the BCF of public network address in public network with AF applied for resource.
In sum, the invention solves and in the network that adopts the independent bearing control layer entity, how to handle user and external network and distribute the QoS problem of resource alternately with private net address, can conveniently realize internetwork intercommunication, expand the ability of network-adaptive business.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (12)
1. private user and the system that guarantees the QoS network interworking, it is characterized in that, comprise private network, guarantee the network and the address conversion gateway of QoS, information mutual between the network of described private network and assurance QoS is undertaken sending in the network of opposite end after address transition is handled by address conversion gateway.
2. private user according to claim 1 and the system that guarantees the QoS network interworking is characterized in that described address conversion gateway can independently be provided with, and also can be arranged to guarantee in the QoS network of network entity.
3. private user according to claim 1 and 2 and the system that guarantees the QoS network interworking, it is characterized in that, described private user is direct or by using or traffic border controlled function entity in address conversion gateway and the assurance QoS network, perhaps strategy determines function PDF/ bearer control function BCF connection.
4. private user and the method that guarantees the QoS network interworking based on a said system is characterized in that, comprising:
When carrying out information interaction between private network and assurance QoS network, described information is carried out sending to the opposite end network after address transition is handled.
5. private user according to claim 4 and the method that guarantees the QoS network interworking is characterized in that when the private user initial request messages, this method specifically comprises:
A, private user are to guaranteeing that the QoS network sends business information;
After entity in B, the assurance QoS network is received described service requesting information, obtain the public network address information of private user to the address conversion gateway application;
C, utilize described public network address information set up with the opposite end between be connected, and carry out information interaction based on described being connected between private user and the opposite end of protecting in the QoS network.
6. private user according to claim 5 and the method that guarantees the QoS network interworking is characterized in that described steps A comprises:
Application or the traffic border controlled function entity of private user in the network that guarantees service quality sends the business information that comprises caller ID information.
7. private user according to claim 5 and the method that guarantees the QoS network interworking is characterized in that described step B comprises:
Use or information that traffic border controlled function entity is sent according to private user in the identity information that carries determine that its address information is a private net address;
Use or traffic border controlled function entity be this private user application public network address to address conversion gateway, and be that private user distributes corresponding public network address, turn back to application or traffic border controlled function entity by address conversion gateway.
8. private user according to claim 5 and the method that guarantees the QoS network interworking is characterized in that described step B comprises:
Use or information that traffic border controlled function entity is sent according to private user in the identity information that carries determine that its address information is a private net address;
Application or traffic border controlled function entity are initiated application public network address request message to strategy decision function PDF/ bearer control function BCF;
Described PDF/BCF is this private user application public network address to address conversion gateway, and is that private user distributes corresponding public network address by address conversion gateway, turns back to PDF/BCF;
The PDF/BCF continuation is back to described public network address on application or the traffic border controlled function entity and preserves, or preserves on PDF/BCF.
9. private user according to claim 8 and the method that guarantees the QoS network interworking is characterized in that described step C also comprises:
On PDF/BCF, utilize corresponding private net address to be private user application private network resource, utilize corresponding public network address to be private user application public network resource.
10. according to claim 7 or 8 described private users and the method that guarantees the QoS network interworking, it is characterized in that described step B also comprises:
Application or traffic border controlled function entity carry the private net address of private user and directly or by PDF/BCF initiate the request of application public network address to address conversion gateway;
Address conversion gateway distributes corresponding public network address for each private net address, and corresponding private net address and public network address relation information are back to application or traffic border controlled function entity;
Perhaps,
Application or traffic border controlled function entity carry its public network address number that needs and directly or by PDF/BCF initiate the request of application public network address to address conversion gateway, and obtain one group of public network address that address conversion gateway returns;
Application or traffic border controlled function entity need be set up the corresponding relation of each private net address and public network address, and when needed this corresponding relation are sent to address conversion gateway as media flow transmission.
11., it is characterized in that described step C comprises according to each described private user of claim 5 to 8 and the method that guarantees the QoS network interworking:
Use or traffic border controlled function entity is preserved the corresponding relation of the public network address of the privately owned address of this private user and distribution, and utilize described public network address information and opposite end to connect;
Based on carrying out information interaction between the described opposite end that is connected in private user and the protection QoS network.
12., it is characterized in that described step C comprises according to each described private user of claim 5 to 8 and the method that guarantees the QoS network interworking:
Application or traffic border controlled function entity are initiated business request information with the privately owned address of private user to PDF/BCF;
Described PDF/BCF determines the public network address that private user is corresponding according to the privately owned address of preserving with the corresponding relation of the public network address of distribution, and utilizes described public network address information and opposite end to connect;
Based on carrying out information interaction between the described opposite end that is connected in private user and the protection QoS network.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101909088A (en) * | 2009-06-03 | 2010-12-08 | 中兴通讯股份有限公司 | Method and system for acquiring public network IP address in femtocell system |
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| CN100450111C (en) | 2005-04-25 | 2009-01-07 | 华为技术有限公司 | System and method for interconnection between private network users and other networks with qualified business service |
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| CN1170393C (en) * | 2001-10-04 | 2004-10-06 | 华为技术有限公司 | Method and system of realizing IP speech service of private network |
| CN1283079C (en) * | 2003-02-20 | 2006-11-01 | 华为技术有限公司 | IP network service quality assurance method and system |
| CN1516409A (en) * | 2003-08-26 | 2004-07-28 | 中兴通讯股份有限公司 | Method for making medium stream pass through network address converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101909088A (en) * | 2009-06-03 | 2010-12-08 | 中兴通讯股份有限公司 | Method and system for acquiring public network IP address in femtocell system |
| CN101909088B (en) * | 2009-06-03 | 2015-06-10 | 中兴通讯股份有限公司 | Method and system for acquiring public network IP address in femtocell system |
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