CN100456731C

CN100456731C - Method and device for ensuring service QoS at different bearing layer network communicating

Info

Publication number: CN100456731C
Application number: CNB2006100988647A
Authority: CN
Inventors: 何芸谷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-07-17
Filing date: 2006-07-17
Publication date: 2009-01-28
Anticipated expiration: 2026-07-17
Also published as: CN1956408A

Abstract

This invention relates to a method and a device for securing service QoS in the inter- communication of different load layer networks including: first of all storing the resource information of an edge gate function BGF of the first load layer network, then determining the service transmission path of the QoS via BGF in different load networks and transmitting related services via said path.

Description

Guarantee the method and the device of QoS of survice in the intercommunication of different bearer layer network

Technical field

The present invention relates to network communications technology field, relate in particular to the method and the device that guarantee QoS of survice in the intercommunication of a kind of different bearer layer network.

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, to obscure in order not causing, above-mentioned resource management Differentiated Services Diff-Serv model to be renamed as the have independent bearing control layer network model of (or pooling of resources key-course).

As shown in Figure 1, in the network model of bearer control layer is independently arranged, the bearer network Control Server (comprises bandwidth broker device (Bandwidth Broker) or QoS server/explorer, as the load network resource manager among Fig. 1) disposed rule and network topology, be 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.Can notify edge router to transmit Business Stream as the load network resource manager of bearer network Control Server according to the path of appointment.

At present, bearer network is to realize that according to the path that bearer control layer is determined user traffic flow is by specifying routing forwarding.Specifically comprise employing based on the bearing mode of MPLS technology and the bearing mode of non-MPLS technology, wherein, the bearing mode of non-MPLS technology can be IP, ATM (asynchronous transfer mode)/FR (frame relay) etc.; In bearer network, use the resource reservation mode to set up logical path along the service flow path of bearer control layer appointment, as the LSP (label switched path) of MPLS, and route and node series under the bearing mode of the non-MPLS technology of employing.

Carry when transmission when bearer network adopts a kind of technology,, then draw the method for end-to-end logical path and can be fine set up available logical path for end-to-end according to network topology as MPLS.But, when the bearer network that adopts the different bearer technology needs intercommunication, as the intercommunication of the carrying of adopting non-MPLS technology and the bearer network that adopts the MPLS technology, the multipath problem that exists when then also not having at present corresponding method with the solution intercommunication, therefore, when bearer network carries out business when transmission, cause probably in the interworking point place Business Stream path that explorer reserves in advance of can't flowing through, cause QoS to guarantee failure

That is to say, in having the network of independent bearing control layer, there is different bearing bed technology, as MPLS, IP, VLAN (VLAN), ATM/FR etc. adopt the content that the affiliated PDF (strategy decisive function) of different bearing bed technology entities/BCF (bearer control function) handles not exclusively the same with mutual content, for example: under the MPLS situation, the resource that PDF/BCF handles is the LSP logical path, intercommunication be information such as label stack; And under non-MPLS situation, the resource that PDF/BCF handles may be physical link, IP route, when the network of two kinds of technology passes through the PDF/BCF intercommunication, when need solving intercommunication signaling alternately and how to determine each other addressing issue, otherwise during intercommunication, if there is the situation of mulitpath, Business Stream will can not transmitted along the path of subsequent network reserved resource probably, cause professional QoS not to be guaranteed.

Yet in having the network of independent bearing control layer, when adopting the carrying interworking between network of different bearer technology, the business that still can't make can be transmitted along the path of reserved resource, thereby also just can't provide corresponding QoS to guarantee at present.

Summary of the invention

In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide in the intercommunication of a kind of different bearer layer network the method and the device that guarantee QoS of survice, thereby still can guarantee the QoS of professional transmission when making the carrying interworking between network of adopting different transmission technologys.

The objective of the invention is to be achieved through the following technical solutions:

The invention provides the method that guarantees QoS of survice in the intercommunication of a kind of different bearer layer network, comprising:

A, in having the independent bearing control layer network, based on resource information with the Border Gateway function BGF that preserves in the independent bearing control layer network, carry out the intercommunication of resource between different loading and control information thereof and mutual, thereby determine the professional transfer path that can guarantee QoS between the different bearer layer network via the Border Gateway function;

The resource information of described Border Gateway function is the bearer control function BCF address information of link circuit resource, Link State and this link correspondence of BGF;

B, transmit the business that need guarantee service quality accordingly by described professional transfer path.

Described BGF comprises:

Do not support GGSN GGSN and/or packet data serving node PDSN in the third generation 3G/ GPRS GPRS network in the network of MPLS;

Perhaps,

Based on the gateway in the MPLS network.

If described different bearer layer network comprises first bearer network and second bearer network, then described steps A comprises:

A1, when the entity of preserving described resource information in first bearer network receives resource bid message, then according to the objective network identity of business, and described resource information, select adjacent BCF in the second bearing bed network;

A2, initiate resource request to the BCF that selects;

After the BCF of A3, described selection receives described resource request, be described traffic assignments QoS resource end to end;

And described step B specifically comprises:

Carry out the forwarding of described business handles based on the described resource of QoS end to end.

Described steps A 2 also comprises:

The service path information of selecting to determine in the first bearing bed network sends to described adjacent BCF,

And when the entity of preserving described resource information in the first bearing bed network was strategy decisive function PDF, described steps A 3 specifically comprised:

BCF by described PDF and described selection is traffic assignments QoS resource end to end in the described first bearing bed network and the second bearing bed network.

Described egress and ingress information comprise: the node port address and/or the sign of egress and ingress.

Described service path information also comprises: the link identification information.

Described link identification information specifically comprises:

Based on the chain line of IP transmission, based on the label switching path LSP label stack of multiprotocol label switching MPLS, based on the VLAN ID VLAN ID of virtual LAN VLAN and/or based on the Permanent Virtual Path PVC information of asynchronous transfer mode ATM/frame relay FR.

Described step B specifically comprises:

B1, after the entity of preserving described resource information in the network and having a processing capacity receives the resource allocation success response message at resource request that the BCF of described selection returns, the corresponding business forwarding strategy is handed down to BGF;

B2, BGF carry out professional forwarding according to described forwarding strategy to be handled.

Described forwarding strategy comprises: based on the routing iinformation of strategy or session.

Described step B also comprises:

The BCF of described selection issues the logical path information of its subsequent network to the edge device of the second bearing bed network, during described professional edge device through the described second bearing bed network, transmits processing by it according to described logical path information.

If the resource information that disposes among the BCF in the second bearing bed network is that then described steps A comprises as the resource information of the gateway of Border Gateway Function:

BCF in A1, the second bearing bed network selects corresponding gateway according to the resource information as the gateway of BGF of configuration;

BCF in A2, the described second bearing bed network also determines the BGF that is arranged in the first bearing bed network with this gateway communication according to the routing information of the gateway of configuration, and the resource information of the BGF in preserving this first bearing bed network and entity with processing capacity send resource request message;

The resource information of BGF in A3, this first bearing bed network of described preservation and the entity with processing capacity are determined the routing information via BGF after receiving the resource request message that the second bearing bed network sends in the first bearing bed network.

Described steps A comprises:

Preserve the resource information of BGF on PDF in having the independent bearing control layer network and/or the BCF.

The present invention also provides the device that guarantees QoS of survice in the intercommunication of a kind of different bearer layer network, be arranged at and have in the independent bearing control layer network, described have comprise first bearer network and the second bearing bed network in the independent bearing control layer network, described device comprises:

Border Gateway function BGF resource information is preserved the unit, be used for preserving the resource information of the BGF of the first bearing bed network and/or the second bearing bed network, the resource information of described BGF is the BCF address information of link circuit resource, Link State and this link correspondence of BGF;

Professional transmit control unit, be used for resource information according to the BGF that preserves, the intercommunication of carrying out the first bearing bed network and the second bearing bed internetwork resource and control information thereof is with mutual, between the described first bearing bed network and the second bearing bed network, determine professional transfer path, and control is by described professional transfer path transmission corresponding business via the assurance QoS of survice of BGF for service selection.

Described device is arranged among the PDF and/or BCF with independent bearing control layer network.

Described device also comprises:

The resource request information receiving element is used for receiving the resource request message that the entity of the first bearing bed network or the second bearing bed network is sent, and triggers described professional transmit control unit.

Described professional transmit control unit comprises:

The strategy determining unit, the resource information that is used for according to the BGF that preserves is that service selection is determined the professional transfer path via the assurance QoS of survice of BGF;

The policy distribution unit, the professional transfer path that is used for determining is handed down to corresponding BGF, carries out the professional foundation of transmitting operation as BGF.

As seen from the above technical solution provided by the invention, owing in having the independent bearing control layer network, disposed the resource information of BGF among the present invention, thereby when making different bearing bed network interworkings, still can select correct path at the interworking point place, and then can guarantee for corresponding path provides corresponding QoS.So the present invention efficiently solves the problem that can not guarantee professional end-to-end QoS in the network that adopts the independent bearing control layer entity when using the bearing bed network interworking of different bearer transmission technology fully, therefore, can guarantee under any circumstance, the bearing bed network all can guarantee professional end-to-end QoS, has effectively improved network performance.

Description of drawings

Fig. 1 is the network model with independent bearing control layer;

Fig. 2 adopts the independent bearing control layer network diagram of different bearer technology for bearer network;

Fig. 3 is for adopting the independent bearing control layer network diagram one of different bearer technology;

Fig. 4 is for adopting the independent bearing control layer network diagram two of different bearer technology;

Fig. 5 is the specific implementation process chart of method of the present invention;

Fig. 6 is a specific implementation structural representation of the present invention and device.

Embodiment

Core of the present invention is when solving the bearer network intercommunication of adopting the different bearer technology in having the network of independent bearing control layer, effectively guarantees the problem of end-to-end QoS.Specifically be by in network, preserving the resource information of Border Gateway function, as on PDF/BCF, preserving corresponding resource information, thereby can carry out the processing of different bearer net interconnecting process and mutual based on described resource information, thereby the assurance teleservice can be transmitted according to the path of reserved resource, and then guarantees professional QoS.

The invention provides the implementation method of different bearer technical network intercommunication in the network (being called for short the BCF network) with independent bearing control layer, adopt this method to guarantee that the business of bearer network carrying transmission can realize that QoS guarantees end to end.

Comprise at least two kinds of different bearing bed networks in the network that the method for assurance QoS of survice is used in the different bearer layer network provided by the invention intercommunication, suppose that it is first bearing bed network (as non-MPLS network) and the second bearing bed network (as the MPLS network).

Based on above-mentioned hypothesis, method of the present invention mainly comprises:

(1) at first, in having the independent bearing control layer network, preserve the resource information of the BGF of the first bearing bed network; Wherein, the resource information of described BGF includes but not limited to: the address information of the BCF of link circuit resource and state information, link correspondence etc., the resource information of described BGF specifically can be kept on PDF and/or the BCF, described BGF can be GGSN (GGSN) and/or the PDSN (packet data serving node) in 3G (third generation)/GPRS (GPRS) network, the entity that perhaps also can have similar functions for other;

(2) in the described first bearing bed network, determine professional transfer path according to described resource information, and transmit corresponding business, thereby can realize QoS assurance end to end at corresponding business by described path via the assurance QoS of survice of BGF;

Corresponding concrete business transmit processing procedure can for:

(1) when the entity (as PDF) of preserving described resource information in the network receives resource bid message, then according to the objective network identity of loaded service in the resource bid message, and the described resource information of preserving in () is selected adjacent BCF in the second bearing bed network;

(2) after BCF adjacent in the second bearing bed network has been determined in selection, just the service path information of selecting to determine can be sent to described adjacent BCF in the first bearing bed network, and, in the described first bearing bed network and the second bearing bed network traffic assignments QoS resource end to end by described PDF and BCF to corresponding BCF initiation resource request;

Wherein, described service path information includes but not limited to: the egress of service path and ingress information also comprise the corresponding link identification information simultaneously alternatively;

Described egress and ingress information are specifically as follows: the node port address and/or the sign of egress and ingress;

Described link identification information specifically can comprise: based on the chain line of I P transmission, based on the LSP label stack of MPLS, based on the VLAN ID of VLAN and/or based on the Permanent Virtual Path PVC information of atm/frame-relay FR.

(3) finish QoS resource allocation end to end after, just can handle based on the forwarding that the described resource of QoS end to end be carried out described business, at this moment, just can QoS guarantees for corresponding business provides end to end, thus solve the problem that prior art exists;

Be specially: after BCF receives described resource request and finishes corresponding resource allocation operations, the entity (as PDF) that to preserve described resource information in network returns response message, after corresponding entity receives the resource allocation success response message at resource request that described BCF returns, just the corresponding business forwarding strategy can be handed down to BGF, handle so that BGF carries out professional forwarding according to described forwarding strategy, described forwarding strategy comprises the routing iinformation based on strategy or session;

At BCF when corresponding entity sends resource allocation success response message, also need to issue the logical path information of its subsequent network to the edge device of the second bearing bed network (as the MPLS network), when described business is passed through the edge device of the described second bearing bed network, transmit processing according to described logical path information by described edge device.

In above-mentioned processing procedure, realized handling to the intercommunication routing of the second bearing bed network by the first bearing bed network, thereby can realize resource allocation process, the service path of corresponding guaranteed qos is provided to the second bearing bed network by the initiation of the first bearing bed network.

In addition, in the present invention, for the resource allocation process that realizes initiating to the first bearing bed network by second bearer network, and then provide the service path of corresponding guaranteed qos, specifically can in the BCF in the second bearing bed network, dispose the information of the BGF in the first bearing bed network, afterwards, just can realize corresponding resource allocation process, specifically comprise based on the information of configuration:

At first, select corresponding BGF by the BCF in the second bearing bed network according to the resource information as the gateway of BGF in the second bearing bed network of wherein configuration;

Secondly, described BCF also determines to be arranged in the first bearing bed network and the BGF corresponding gateway communication according to the routing information of gateway of configuration, and sends resource request message to the described entity that is arranged in first its resource information of preservation corresponding with BGF corresponding gateway communication the bearing bed network;

At last, after the entity of its resource information of preservation that the BGF of described and corresponding gateway communication is corresponding is received the resource request message that the second bearing bed network sends, in the first bearing bed network, determine via the routing information that is arranged in the first bearing bed network and the BGF corresponding gateway communication, and guarantee for corresponding path provides the QoS that needs.

For ease of the understanding of the present invention, will be elaborated to specific implementation of the present invention to closing accompanying drawing below.

At first, the networking structure schematic diagram of the BCF network that the present invention the is used description of giving an example.For example, as shown in Figure 2, in the adaptable network of the present invention, the BGF (as the GGSN among the 3GPP) of PDF/BCF1 control adopts pure IP carrying (can be called the first bearing bed network), ER (the edge router)/TPF (transport plane function) of PDF/BCF2 control and the network using MPLS carrying (can be called the second bearing bed network) of back.

In Fig. 2, strategy decision function PDF and bearer control function BCF can be arranged in the same physical entity, also can be arranged in the different physical entities, also can only be set to a kind of logic form and exist in certain section network; In any case be provided with, all do not influence realization of the present invention.

Among the present invention, as shown in Figure 3, if the gateway device (as the GGSN among Fig. 3) that does not have independent BCF control to link to each other with PDF, then PDF is except the functions such as strategy decision of itself, the logical topology and the resource that also need management gateway equipment, and select the outlet pathway of gateway device for Media Stream.At this moment, corresponding PDF finishes is the merging of PDF and the logic function of BCF0 among Fig. 4, and owing to the control point of BCF0 and PDF all is Border Gateway Function equipment GGSN, therefore, can merge PDF and BCF0 is same physical entity.In Fig. 3, interworking point is the interface that GGSN arrives outside GW, as L1, and L2; What the BCF among Fig. 3 controlled is external network, and edge device is GW1 and GW2, and the right and wrong MPLS network of PDF control is as GGSN.

Afterwards, will be described in detail the specific implementation of method of the present invention in conjunction with Fig. 2, Fig. 3, Fig. 4 and Fig. 5.

The groundwork process of method of the present invention specifically comprises as shown in Figure 5:

Step 51: the resource information that in network, disposes BGF (as GGSN etc.) with independent bearing layer, for example, specifically can on PDF, dispose and preserve described resource information, and described resource information comprises link circuit resource and state information, and the address information of corresponding BCF;

In having the independent bearing control layer network, in order to guarantee redundancy and failover capability, network entity often has a plurality of interfaces to link different adjacent entities when intercommunication, that is to say to have the ability of mulitpath arrival to end subscriber usually; As Fig. 3, GGSN can be connected to gateway GW1 and GW2 by link L1 and L2 respectively, and described gateway GW1 and GW2 are respectively by bearer control function BCF1 and BCF2 control.When Media Stream need arrive the opposite end by GGSN, then at first need determine the resource of GGSN by the PDF control of having disposed resource information to which adjacent BCF request subsequent network, just need correctly to search out adjacent BCF;

Therefore, for guaranteeing the correct adjacent PDF/BCF that seeks, can dispose link circuit resource and state and the corresponding BCF address of GGSN on PDF, described link circuit resource comprises: the normal condition of link or abnormality; When state variation, report PDF by GGSN, thereby the last configuration preservation of assurance PDF is the real link-state information of GGSN, and then makes that the link selection of PDF is more accurate, can provide reliable QoS for Media Stream.

Step 52: in network with independent bearing layer, when the QoS authorization requests of receiving application function AF or GGSN, or during the resource bid of other PDF/BCF, then by the PDF of the resource information that disposes BGF objective network identity (objective network sign and/or address) according to Media Stream, and the link circuit resource of the BGF (as GGSN) of configuration and the suitable adjacent BCF of policy selection of state and operator, and to this BCF initiation resource request;

If the configuration of the resource information of described BGF is stored in other entities, then carry out the processing that this step is described by corresponding other entities;

With the corresponding resource information of configuration in PDF is example, when PDF when BCF initiates resource request, the GGSN that PDF need will select according to link circuit resource and the state of GGSN by the interface Gu interface between itself and BCF is sent to BCF to the routing information of neighboring gateway GW, so that BCF is known the routing information of media stream delivery;

Described routing information is specifically as follows the identity of the node at two ends, path, be information such as the node port address of egress and ingress or sign, and described as required routing information can also comprise the sign of this link, for example, chain line ID under the IP situation, the LSP under the MPLS situation (label switched path) label stack, the VLAN ID (VLAN ID) under the VLAN situation, PVC under the ATM/FR situation (Permanent Virtual Channel), or the like;

Suppose that in Fig. 3 that PDF is that session selects is link L1, then PDF should comprise the identity information of egress GGSN and the identity information of ingress GW1 to the parameter that BC F1 transmits; Like this, PDF and BCF just can obtain the correct path of Media Stream respectively, thereby can correctly be traffic assignments QoS resource end to end, realize the assurance to the QoS of corresponding service.

Step 53:BCF carries out corresponding resource allocation operations after receiving described resource request, and after finishing corresponding resource allocation operations, returns resource allocation success response message to PDF, to confirm the resource allocation operations success;

Step 54: when PDF received resource allocation success response message from BCF, PDF issued the Media Stream forwarding strategy to edge device GGSN;

Comprise routing iinformation in the described forwarding strategy based on strategy/session by the PDF decision, as as PDF be session select be link L1 the time, PDF is appointed as the forwarding route of the corresponding Media Stream of this session and passes through L1, for example, carry out in the mode of ACL (access control lists) or TFT (Traffic flowTemplate, Traffic Profile) at GGSN; The forwarding strategy that GGSN issues according to PDF is carried out corresponding Media Stream repeating process.

Step 55: in execution in step 54, BCF also needs the edge device GW1 in the MPLS network to issue the logical path information of subsequent network, comprise MPLS label stack etc., Media Stream is that label stack is transmitted processing according to the logical path of formulating when flowing through GW1.

, to the processing procedure of step 55, realized in above-mentioned steps 51 by the implementation procedure of non-MPLS entity (as GGSN) to the assurance QoS of survice of MPLS entity (as GW).

Among the present invention, can also realize by the assurance of MPLS entity (as GW) to the QoS of survice of non-MPLS entity (as GGSN), concrete processing procedure is the reverse processing procedure of processing procedure shown in Figure 5, promptly select the path of MPLS entity to non-MPLS entity by the BCF under the MPLS entity, and can carry out follow-up resource request by the PDF/BCF of the PDF/BCF under the MPLS entity under non-MPLS entity as required and handle, thereby realize that QoS guarantees end to end.

The present invention also provides the device that guarantees QoS of survice in the intercommunication of a kind of different bearer layer network, its specific implementation structure as shown in Figure 6, described device is arranged among the PDF and/or BCF with independent bearing control layer network, described have comprise first bearer network and the second bearing bed network in the independent bearing control layer network, and described device comprises following processing unit:

(1) the BGF resource information is preserved the unit

Be used for preserving the resource information of the BGF of the first bearing bed network and/or the second bearing bed network, described resource information comprises link circuit resource and state information, and the address information of corresponding BCF etc.;

(2) professional transmit control unit

Be used for resource information according to the BGF that preserves, between the described first bearing bed network and the second bearing bed network, determine professional transfer path, and control is by described professional transfer path transmission corresponding business via the assurance QoS of survice of BGF for service selection;

Described professional transmit control unit comprises:

Alternatively, device of the present invention also comprises following processing unit:

(3) resource request information receiving element

Be used for receiving the resource request message that the entity of the first bearing bed network or the second bearing bed network is sent, and trigger described professional transmit control unit.

In sum, realization of the present invention makes to have in the network of independent bearing control layer entity, for each bearer network that has adopted the different bearer technology, still can effectively guarantee professional end-to-end QoS when its intercommunication.

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

1, guarantee the method for QoS in the intercommunication of a kind of different bearer layer network, it is characterized in that, comprising:

The resource information of described Border Gateway function is the bearer control function BCF address information of link circuit resource, Link State and this link correspondence of Border Gateway function;

2, method according to claim 1 is characterized in that, described Border Gateway function comprises:

Do not support third generation 3G network or GGSN GGSN in the GPRS GPRS network or packet data serving node PDSN in the network of MPLS;

Perhaps,

Based on the gateway in the MPLS network.

3, method according to claim 1 and 2 is characterized in that, if described different bearer layer network comprises first bearer network and second bearer network, then described steps A comprises:

A2, initiate resource request to the BCF that selects;

And described step B specifically comprises:

4, method according to claim 3 is characterized in that, described steps A 2 also comprises:

5, method according to claim 4 is characterized in that, described service path information comprises: the node port address and/or the sign of egress and ingress.

6, method according to claim 5 is characterized in that, described service path information also comprises:

Based on the chain line of IP transmission, based on the label switching path LSP label stack of multiprotocol label switching, and based on the VLAN ID VLAN ID of virtual LAN VLAN and/or based on the Permanent Virtual Path PVC information of asynchronous transfer mode ATM/frame relay FR.

7, method according to claim 4 is characterized in that, described step B specifically comprises:

8, method according to claim 7 is characterized in that, described forwarding strategy comprises: based on the routing iinformation of strategy or session.

9, method according to claim 7 is characterized in that, listens the step B that states also to comprise:

10, method according to claim 1 and 2 is characterized in that, if the resource information that disposes among the BCF in the second bearing bed network is that then described steps A comprises as the resource information of the gateway of Border Gateway Function:

11, method according to claim 1 is characterized in that, in described steps A:

The resource information of described Border Gateway function is kept among the strategy decisive function PDF and/or BCF that has in the independent bearing control layer network.

12, guarantee the device of QoS of survice in the intercommunication of a kind of different bearer layer network, be arranged at and have in the independent bearing control layer network, described have comprise first bearer network and the second bearing bed network in the independent bearing control layer network, it is characterized in that described device comprises:

13, device according to claim 12 is characterized in that, described device is arranged among the PDF and/or BCF with independent bearing control layer network.

14, according to claim 12 or 13 described devices, it is characterized in that described device also comprises:

According to claim 12 or 13 described devices, it is characterized in that 15, described professional transmit control unit comprises: