CN101232441B - Resource in NGN and admittance controlling subsystem and method - Google Patents

Abstract

The invention provides a resource and access control subsystem in NGN. The subsystem comprises an access network resource control function unit (A-RCF); an access admission control function unit (A-ACF); a core network resource control function unit (A-CRCF); and an interconnection access control function unit (I-ACF). A RACS used as a logic independent subsystem can simultaneously support QOS transmission requirements of a plurality of service subsystems (including an IP multimedia service subsystem and a PSTN/ISDN service emulation subsystem) via the function frame of the RACS, implementation of examination resource acquirability of the RACS when access control is carried out and implementation of end-to-end QoS control by the RACS. The resource and access control subsystem can implement QoS control of the interconnecting link between different administrative domains. The subsystem can equalize network load, prevent jam (especially at the bottleneck of network resource), support necessary transmission layer measurement and protection mechanism, and solve a problem of competition of transmission resource of internal NGN service in each network administrative domain.

Description

Resource among a kind of NGN and admission control subsystem and method

Technical field

The present invention relates to next generation network (NGN) technology, it is particularly related to resource and functional framework, interface and the control technology of admission control subsystem (RACS) among the NGN, is resource and admission control subsystem and the method among a kind of NGN concretely.

Background technology

One of characteristics of next generation network (NGN:Next Generation Network) are that operation layer separates with transport layer, and transport layer is based on dividing into groups and optical tech.The telecommunications of ETSI (ETSI) and IP UNE business and agreement (TISPAN) working group have also begun to formulate the NGN functional framework of supporting to fix and move fusion at present on the basis of 3G (Third Generation) Moblie IP Multimedia System (3G IMS); As shown in Figure 1, framework comprises an operation layer and the transport layer based on the IP technology.

Operation layer is made up of the general service parts (Applications andCommon components is like application server, Home mobile subscriber server, billing function, security gateway, signaling gateway function, IWF and interconnection boundary Control function etc.) of Network attachment subsystem (NASS-The Network Attachment SubSystem), resource and admission control subsystem (RACS-The Resource and Admission ControlSubsystem), IP Multimedia System (IMS-The IP Multimedia Subsystem), PSTN/ISDN Emulation Subsystem (PES-The PSTN/ISDN Emulation Subsystem), other IP multimedia subsystem, IMSs and application and these subsystems.

Under the control of NASS and RACS, transport layer provides the IP connectivity of NGN terminal room, has hidden access and employed tranmission techniques below the IP core network layer, has realized separating with mutual of operation layer and transport layer.These subsystems possibly be distributed in network/service provider's the management domain.

Transport layer has only medium gateway function (MGF) and the Border Gateway Function (BGF) maybe be mutual with operation layer.BGF provides two IP to transmit the interface between the territory, possibly be positioned at the border of the local network of users, Access Network or core net.One deck and two layers of rules of BGF termination and intercommunication two side interfaces also possibly provide following function: 1) door opens and closes (so-called door promptly carries out packet filtering according to the IP address); 2) the go out packet labeling of flow; 3) resource allocation of upstream and downstream flow and RSVP; 4) IP address and port assignment and conversion; 5) supervision of entering flow; 6) the IP address is anti-cheats; 7) use measurement.In order to control above-mentioned functions according to service needed, BGF possibly carry out with the operation layer entity alternately.Dwelling house BGF (R-BGF) is positioned at the border of the local network of users, inserts the border that BGF (Access Border Gateway Function) is positioned at Access Network, and interconnection BGF (I-BGF) is positioned at the border of core net.

Resource and admission control subsystem (RACS) are critical components supporting end-to-end quality of service (QoS) control in the NGN environment, and position in the NGN overall framework and external interface relation thereof are as shown in Figure 2.Resource and admission control subsystem need have interface relationship with the RACS in transport layer, Network Management Function (NMF), Network attachment subsystem, IP Multimedia System, PSTN/ISDN Emulation Subsystem, other service sub-systems and other networks.

RACS provides access control and gate control function (comprising network address port conversion and control and DSCP mark etc.).Access control comprises that the user profile inspection of being preserved based on access network annex subsystem is authorized, inspection operator specific policy is regular and the inspection resource availability.The inspection resource availability means that access control control examines the bandwidth of being asked and whether meet the user and order bandwidth and dedicated bandwidth.

In Fig. 2, show RACS position and external interface relation thereof in the NGN framework.Because NGN diversity of operations and multimedia characteristics, how to make IP-based transport layer can provide than transmit as possible service better, can match in excellence or beauty with PSTN, service quality end to end, be indispensable problem during NGN studies.RACS needs its external interface of research and built-in function framework as a key subsystem supporting end-to-end QoS control in the NGN framework.At present, the NGN FG of ETSI and ITU Telecommunication Standardization Sector (ITU-T) has just begun to start research and the standard formulation of RACS, but also is in the discussion of outline and demand stage.

The technical scheme of prior art one:

TS23.207 has defined a strategy decisive function (PDF) to support the end-to-end QoS control in the UMTS territory in 3GPP R6 version framework, and is as shown in Figure 3.Through Gq interface, pass through Go interface between PDF and the traffic plane function (TPF) between PDF and the application function (AF).Also in TS.23.125, considered to go up the charging of supporting based on stream, through Rx interface, passed through the Gx interface between CRF and the TPF between CRF and the AF in charging controlled function (CRF).

The control point of traffic plane function (TPF-Traffic Plane Function) Go is positioned on the gateway at core net edge, i.e. GGSN; Charging controlled function (CRF-Charging Rules Function); Application function (AF-Application Function needs the application function of IP bearing resource control, as be exactly P-CSCF in IP Multimedia System); Charging Collection Function (CCF-ChargingCollection Function); Online Charging System (OCS-Online Charging System); Strategy decisive function (PDF-Policy Decision Function); As shown in Figure 3.

For the 3GPP IP multimedia service, the end-to-end QoS framework is as shown in Figure 4.With Diffserv mechanism and big bandwidth guarantee QoS, the IP bearer service of UMTS Access Network (being UE to GGSN) is with PDP context control QoS on the IP backbone.PDF and AF and GGSN are mutual, carry out access control based on customer service agreement and management strategy, and the DiffServ of control GGSN transmits behavior.PDF follows the policy control framework that IETF RAP group formulates.

The QoS management is divided into three sections: local UMTS Access Network, IP backbone and remote subscriber Access Network.

In order to realize QoS end to end, perhaps can realize in the following manner between the QoS controlling mechanism of local UMTS Access Network, IP backbone and remote subscriber Access Network comprising intercommunication: (1) along the signaling of data flow path (like RSVP, LDP); (2) intercommunication between policy control or the rm-cell; (3) internetwork border router is carried out SLA (grade of service agreement).

Therefore; End-to-end QoS framework among the 3GPP TS23.207 has mainly defined QoS controlling mechanism and the PDF function in the UMTS territory; Do not define QoS control framework and mechanism in the backbone network, do not have the end-to-end QoS framework and the mechanism of definition and the intercommunication of UMTS external network yet.

The shortcoming of prior art one:

When carrying out access control and gate control, PDF (strategy decisive function) only reaches an agreement on and management strategy based on customer service; Not based on the availability (comprising the competition of shared resource) of resource status inspection Internet resources, the QoS problem that the IP bearing bed that can not solve UMTS Access Network and core network edge causes when transshipping because of resource contention.

IP kernel heart net relies on DiffServ mechanism and big bandwidth, does not define the resource control function framework of IP kernel heart net, can not realize that the strict QoS of real time business guarantees on the core net.

The end-to-end QoS framework and the mechanism that do not have definition and the intercommunication of UMTS external network can not realize that QoS guarantees end to end.

The technical scheme of prior art two:

J.163, ITU-T has described IPCablecom dynamic QoS model, and is as shown in Figure 5.Call-management server (CMS) is responsible for the control Multimedia session and is set up, and safeguards the state of each calling.Door controller (GC:Gate Controller) is that CMS goes up a part of being responsible for carrying out the QoS correlation function, carries out the QoS access control, goes up the door operation of realizing through pkt-q6 interface control line cable modem terminal system (CMTS).GC bears the policy decision point function, follows the policy control framework that IETF RAP group formulates.

The QoS management is divided into three sections: origination side Access Network, IP backbone, termination side joint network.

The QoS of Cable Access Network carries flow by the qos parameter of definition in J.112 and traffic specification is controlled; The QoS object class of carrying in these parameters is similar to entrained TSPEC of RSVP and RSPEC object, so just can allow dynamically based on the QoS resource reservation that flows.Stream can be unidirectional or two-way.

The IP kernel heart adopts Diffserv mechanism guaranteed qos on the net.RSVP then can be used to the QoS request of end-to-end transmission multimedia service.

As shown in Figure 5, be IPCablecom dynamic QoS model.

Realize session management and resource coordination through the pkt-q8 interface between the CMS.Resource management on the backbone network perhaps be every stream or possibly be flowcollector aggregation scheme FlowCollector more, J.163 do not define.

Can door (Gate) be that definition CMTS goes up the structure of QoS operation, be connected to the control point of the key service of high-quality for Access Network.A door (Gate) is made up of message classification device (Packet Classifier), traffic shaper (Traffic Policer) and interface three parts that are used for statistics collection information.Gate control can guarantee to have only the session of authorizing through the service provider to receive high quality services.The gate control operational applications is opened or is closed in each call data stream.Need GC according to carry out the access control inspection from the resource management request of client when opening a door, if necessary perhaps need on network, carry out resource reservation for this session.

The shortcoming of prior art two:

Door controller (GC) is integrated on the CMTS, and upgrade cost was high when new multimedia service was provided, and can not support the QoS demand of other operation controlling entity.

When carrying out access control and gate control, door controller (GC) only reaches an agreement on and management strategy based on customer service; Not based on the availability (comprising the competition of shared resource) of resource status inspection Internet resources, the QoS problem that the IP bearing bed that can not solve Cable Access Network and core network edge causes when transshipping because of resource contention.

IP kernel heart net relies on DiffServ mechanism and big bandwidth, does not define the resource control function framework of IP kernel heart net, can not realize that the strict QoS of real time business guarantees on the core net.

The end-to-end QoS framework and the mechanism that do not have definition and the intercommunication of Cable external network can not realize that QoS guarantees end to end.

Summary of the invention

The objective of the invention is to; Resource and admission control subsystem and method among a kind of NGN are provided; Through the functional framework of RACS, RACS checks the realization of resource availability when doing access control, and RACS carries out the realization of end-to-end QoS control; Make as the RACS of a logic independent subsystem, can support a plurality of service sub-systems transmission QoS demand of (comprising IP multimedia service subsystem and PSTN/ISDN business simulating subsystem) simultaneously.Can realize the QoS control of interconnecting link between different management domains.Balance network load and congested to prevent the neck of Internet resources (particularly), and support necessary transport layer to measure and protection mechanism.Solve the professional transmission resource contention problem of the inner NGN of each management domain of network.

Technical scheme of the present invention is:

Resource among a kind of NGN and admission control subsystem, comprising: access network resource controlled function unit (A-RCF); Insert admission control function unit (A-ACF); Resources of core network controlled function unit (C-RCF); Interconnected admission control function unit (I-ACF); And,

Gq interface:, described access admission control function unit (A-ACF) is issued in the resource requirement of transport layer to the application of in this carrier network, initiating through Gq interface;

Go interface: described access admission control function unit (A-ACF) inserts borde gateway (Access Border Gateway Function) through Go interface control;

The G3 interface: interconnected borde gateway (I-BGF) is controlled through the G3 interface in described interconnected admission control function unit (I-ACF);

The G2 interface: core net flow plane (C-TPF) function is controlled through the information of G2 interface collection resources of core network in described resources of core network controlled function unit (C-RCF);

G1 interface: the information that access network resource is collected through the G1 interface in described access network resource controlled function unit (A-RCF), the function on control Access Network flow plane (A-TPF);

X1 and X2 interface: between described access admission control function unit (A-ACF) and the access-in resource controlled function unit (A-RCF) through the X1 interface, with described core resource controlled function unit (C-RCF) between mutual and cooperates through X2 interface, resource availability inspection end to end of the Application and implementation in the carrier network and QoS are controlled;

X3 and X4 interface: pass through the X3 interactive interfacing between described interconnection admission control function unit (I-ACF) and the resources of core network controlled function unit (C-RCF), to the Application and implementation resource availability inspection end to end and the QoS control of cross operator network; The resource requirement that the cross operator of initiating in this carrier network is used through the X4 interactive interfacing, is transmitted also and between the resource of other carrier networks and the admission control subsystem (RACS) in described interconnection admission control function unit (I-ACF);

I1 interface: through the I1 interactive interfacing, check user profile (user profiles) between described access admission control function unit (A-ACF) and the Network attachment subsystem (NASS);

The Id interface: described interconnected admission control function unit (I-ACF) passes through the Id interactive interfacing with interconnection boundary Control function (IBCF), uses the cross operator of in other carrier networks, initiating described interconnected admission control function unit (I-ACF) is issued in the resource requirement of transport layer.

Described Go interface is carried out door operation, packet labeling, resource reservation, the network address and functions such as port translation, traffic policing;

Described G3 interface is carried out door operation, packet labeling, resource reservation, the network address and functions such as port translation, traffic policing;

Information such as resources of core network is collected in described resources of core network controlled function unit (C-RCF) through the G2 interface topology and bandwidth are controlled the functions such as service quality (QoS) route and resource reservation on core net flow plane (C-TPF);

Information such as access network resource is collected in described access network resource controlled function unit (A-RCF) through the G1 interface topology and bandwidth are controlled the functions such as QoS route and resource reservation on Access Network flow plane (A-TPF).

After described A-ACF receives the resource request from Gq interface, mutual through I1 interface and NASS, inspection user profile (user profiles);

If A-RCF is arranged in the Access Network; Then A-ACF is transmitted to resource request through the X1 interface availability of resource in the A-RCF inspection Access Network; Obtain the check result of access network resource availability from A-RCF, possibly carry information such as the mark of distributing to application data stream and path;

If application data stream be get into the core net direction and core net on C-RCF is arranged; Then A-ACF is transmitted to resource request through X2 interface the availability of resource in the C-RCF inspection core net; Obtain the check result of resources of core network availability from C-RCF, possibly carry information such as the mark of distributing to application data stream and path.

After described I-ACF receives resource request from the Id interface, the resource availability of the service level agreement (SLA) between inspection operator, operation policy criteria and interconnecting link;

If application data stream be get into the core net direction and core net on C-RCF is arranged; Then I-ACF is transmitted to the availability of resource in the C-RCF inspection core net through the request of X3 interface resource; Obtain the check result of resources of core network availability from C-RCF, possibly carry information such as the mark of distributing to application data stream and path.

After described A-ACF receives resource request, carry out the inspection of authentication and resource availability, from the resource availability check result that RCF obtains, possibly carry information such as the mark of distributing to application data stream and path;

A-ACF returns to application function to the promise result of resource request through Gq interface;

If authentication is passed through, A-ACF passes through Go interface and controls functions such as the door operation of Access Border Gateway Function, packet labeling, flow mapping, can adopt pre-configured mode or outer packet mode.

After described A-ACF receives resource request, carry out the inspection of authentication and resource availability;

After I-ACF receives resource request, carry out the inspection of authentication and resource availability;

A-ACF returns to application function to the promise result of resource request through Gq interface;

I-ACF returns to interconnecting gateway controlled function (IBCF) to the promise result of resource request through the Id interface;

If authentication is passed through, A-ACF passes through Go interface and controls functions such as the door operation of Access Border Gateway Function, packet labeling, flow mapping, can adopt pre-configured mode or outer packet mode;

If authentication is passed through, I-ACF passes through the G3 interface and controls functions such as the door operation of I-BGF, packet labeling, flow mapping, can adopt pre-configured mode or outer packet mode.

The present invention also provides resource and the admittance control method among a kind of NGN; Insert admission control function (A-ACF) and carry out authentication, through Go interface the Access Border Gateway Function that is positioned at the access network boundary is controlled according to authenticating result based on user profile (being kept among the NASS), operation policy criteria and resource availability;

Interconnection admission control function (I-ACF) carries out authentication based on the service level agreement between operator (SLA), operation policy criteria and resource availability, the I-BGF that is positioned at the core network boundary is controlled through the G3 interface according to authenticating result;

Access network resource controlled function (A-RCF) is collected the information of access network resource through the G1 interface; Resource reservation in the Control Network; Maintenance resources availability and resource allocation status database; Resource availability according to from A-ACF is checked request, checks and resource allocation based on the resource status database, and upgrades resource allocation status and return resource availability inspection affirmation;

Resources of core network controlled function (C-RCF) is collected the information of resources of core network through the G2 interface; Resource reservation in the Control Network; Maintenance resources availability and resource allocation status database; Resource availability according to from A-ACF or I-ACF is checked request, checks and resource allocation based on the resource status database, and upgrades resource allocation status and return resource availability inspection affirmation.

Carry out following step according to authenticating result through the Access Border Gateway Function that Go interface control is positioned at the access network boundary: step 1, door open or close (so-called door promptly carries out packet filtering according to the IP address); The packet labeling of step 2, the flow of going out; The resource allocation of step 3, upstream and downstream flow and RSVP; Step 4, IP address and port assignment and conversion; Step 5, the supervision that gets into flow; Step 6, IP address prevent cheating; Step 7, use are measured.

Carry out following step according to authenticating result through the I-BGF that the control of G3 interface is positioned at the core network boundary: step 1 ' door operation, step 2 ' packet labeling, step 3 ' resource reservation, step 4 ' network address and port translation, step 5 ' traffic policing.

Access network resource information comprises: information such as topology and bandwidth; Resources of core network information comprises: information such as topology and bandwidth.

In each management domain, can dispose one or more RCF according to the network size and the packet bearer type of skill, can there be the backup relation between these RCF.

If a management domain deployed a plurality of RCF, then adopt general and extendible protocol interface (as expanding existing standard agreement or developing New Deal) between RCF and the RCF.

General between the RCF of different management domains through the ACF interconnection, adopt general and extendible protocol interface (as expanding existing standard agreement or developing New Deal) between ACF and the RCF.

If have trusting relationship between different management domains, can directly link to each other between the RCF of different management domains, as the same interactive information in a management domain.

ACF and RCF are logical functional entities.

The step of A-ACF inspection resource availability comprises:

After A-ACF receives the resource request from Gq interface, mutual through I1 interface and NASS, inspection user profile (user profiles); If A-ACF does not have the local policy storehouse, the operation policy criteria on the also possible remote inquiry strategic server;

If A-RCF is arranged in the Access Network; Then A-ACF is transmitted to resource request through the X1 interface availability of resource in the A-RCF inspection Access Network; Obtain the check result of access network resource availability from A-RCF, possibly carry information such as the mark of distributing to application data stream and path;

If application data stream be get into the core net direction and core net on C-RCF is arranged; Then A-ACF is transmitted to resource request through X2 interface the availability of resource in the C-RCF inspection core net; Obtain the check result of resources of core network availability from C-RCF, possibly carry information such as the mark of distributing to application data stream and path.

The step of I-ACF inspection resource availability comprises:

For the application of cross operator network, after I-ACF receives resource request from the Id interface, the resource availability of the service level agreement (SLA) between inspection operator, operation policy criteria and interconnecting link;

If application data stream be get into the core net direction and core net on C-RCF is arranged; Then I-ACF is transmitted to the availability of resource in the C-RCF inspection core net through the request of X3 interface resource; Obtain the check result of resources of core network availability from C-RCF, possibly carry information such as the mark of distributing to application data stream and path.

For the application in the carrier network, the step that RACS carries out end-to-end QoS control comprises:

Application function is confirmed the resource requirement of application in using constructive process, issues the A-ACF of initiating terminal and destination respectively through Gq interface;

After A-ACF receives resource request, adopt 16 said methods to carry out the inspection of authentication and resource availability, from the resource availability check result that RCF obtains, possibly carry information such as the mark of distributing to application data stream and path;

A-ACF returns to application function to the promise result of resource request through Gq interface;

If authentication is passed through, A-ACF passes through Go interface and controls functions such as the door operation of Access Border Gateway Function, packet labeling, flow mapping, can adopt pre-configured mode or outer packet mode.

For the application of cross operator network, the step that RACS carries out end-to-end QoS control comprises:

In using constructive process, application function is confirmed the resource requirement of application, issues A-ACF through Gq interface; IBCF (interconnecting gateway controlled function) confirms the resource requirement of application, issues I-ACF through the Id interface;

After A-ACF receives resource request, adopt 16 said methods to carry out authentication and resource availability inspection;

After I-ACF receives resource request, adopt 17 said methods to carry out authentication and resource availability inspection;

A-ACF returns to application function to the promise result of resource request through Gq interface;

I-ACF returns to IBCF (interconnecting gateway controlled function) to the promise result of resource request through the Id interface;

If authentication is passed through, A-ACF passes through Go interface and controls functions such as the door operation of Access Border Gateway Function, packet labeling, flow mapping, can adopt pre-configured mode or outer packet mode;

If authentication is passed through, I-ACF passes through the G3 interface and controls functions such as the door operation of I-BGF, packet labeling, flow mapping, can adopt pre-configured mode or outer packet mode.

Beneficial effect of the present invention is that RACS can support a plurality of service sub-systems transmission QoS demand of (comprising IP multimedia service subsystem and PSTN/ISDN business simulating subsystem) simultaneously as a logic independent subsystem.

On the basis of the access access control/gate control function (A-ACF) of carrier network edge, introduced interconnection admission control function (I-ACF) at the network boundary place, can realize the QoS control of interconnecting link between different management domains.

Introduced resource control function (RCF), be responsible for availability, QoS route and the resource reservation of inspection Internet resources,, and supported necessary transport layer to measure and protection mechanism with balance network load and congested to prevent the neck of Internet resources (particularly).Introduce RCF and can solve the professional transmission resource contention problem of the inner NGN of each management domain of network.

RACS functional framework provided by the invention adopts the not restriction of which kind of group technology type to transport layer Access Network and core net.

Adopt general and extendible protocol interface between ACF and the RCF and between RCF and the RCF, with realize irrelevant.

Description of drawings

Fig. 1 is TISPAN NGN overall framework figure;

Fig. 2 is RACS position and external interface graph of a relation thereof in the NGN framework;

Fig. 3 is the interface relationship figure of PDF function and other functions;

Fig. 4 is the end-to-end QoS frame diagram of 3GPP IMS based on PDF;

Fig. 5 is an IPCablecom dynamic QoS illustraton of model;

Fig. 6 is resource of the present invention and admission control subsystem functional framework and interface schema.

Embodiment

Below in conjunction with description of drawings embodiment of the present invention.RACS can support a plurality of service sub-systems transmission QoS demand of (comprising IP multimedia service subsystem and PSTN/ISDN business simulating subsystem) simultaneously as a logic independent subsystem.The invention provides the functional framework and the inside and outside interface thereof of RACS (resource and admission control subsystem), RACS checks the method for resource availability when doing access control, and RACS carries out the method for end-to-end QoS control.

The present invention has introduced the interconnection admission control function (I-ACF) at the network boundary place on the basis of the access access control/gate control function (A-ACF) of carrier network edge, can realize the QoS control of interconnecting link between different management domains.ACF possibly have the controlled function of the network address and port translation (NAPT) simultaneously.

The present invention is in order to solve the professional transmission resource contention problem of the inner NGN of each management domain of network; Introduced resource control function (RCF); Be responsible for availability, QoS route and the resource reservation of inspection Internet resources; With balance network load and congested to prevent the neck of Internet resources (particularly), and support necessary transport layer to measure and protection mechanism.

Admission control function among the present invention (ACF) and resource control function adopt the not restriction of which kind of group technology type to transport layer Access Network and core net.

RACS functional framework provided by the invention is as shown in Figure 6, has defined internal interface and the external interface between the external module between the functional entity.Wherein:

R-BGF-Residential Border Gateway Function dwelling house Border Gateway Function;

NASS-Network Attachment SubSystem Network attachment subsystem;

P-CSCF-Proxy Call Session Control Function Proxy Call Session Control Function;

AF-Application Functions application function;

IBCF-Interconnection Border Control Function interconnection boundary Control function;

A-ACF-Access ACF inserts admission control function;

The I-ACF-Interconnection ACF admission control function that interconnects;

A-RCF-RCF in access network access network resource controlled function;

C-RCF-RCF in core networks resources of core network controlled function;

Access Border Gateway Function-Access BGF Access Border Gateway Function;

The I-BGF-Interconnection BGF Border Gateway Function that interconnects;

A-TPF-TPF in access network Access Network traffic plane function;

C-TPF-TPF in core network core net traffic plane function;

RACS comprises admission control function (ACF) and resource control function (RCF).

Admission control function (ACF) is distributed in the boundary between carrier network edge and the carrier network.Insert admission control function (A-ACF) and carry out authentication based on user profile (being kept among the NASS), operation policy criteria and resource availability, carry out following function according to authenticating result through the Access Border Gateway Function that Go interface control is positioned at the access network boundary: 1) door opens or closes (so-called door promptly carries out packet filtering according to the IP address); 2) the go out packet labeling of flow; 3) resource allocation of upstream and downstream flow and RSVP; 4) IP address and port assignment and conversion; 5) supervision of entering flow; 6) the IP address is anti-cheats; 7) use measurement.

Interconnection admission control function (I-ACF) carries out authentication based on the service level agreement between operator (SLA), operation policy criteria and resource availability, carries out door operation, packet labeling, resource reservation, the network address and functions such as port translation, traffic policing according to authenticating result through the I-BGF that the control of G3 interface is positioned at the core network boundary.

Resource control function (RCF) is distributed in each management domain of network, in each access network territory, each core network domain.

Access network resource controlled function (A-RCF) is collected the information such as topology and bandwidth of access network resource through the G1 interface; Resource reservation in the Control Network; Maintenance resources availability and resource allocation status database; Resource availability according to from A-ACF is checked request, checks and resource allocation based on the resource status database, and upgrades resource allocation status and return resource availability inspection affirmation.

Resources of core network controlled function (C-RCF) is collected the information such as topology and bandwidth of resources of core network through the G2 interface; Resource reservation in the Control Network; Maintenance resources availability and resource allocation status database; Resource availability according to from A-ACF or I-ACF is checked request, checks and resource allocation based on the resource status database, and upgrades resource allocation status and return resource availability inspection affirmation.

In each management domain, can dispose one or more RCF according to the network size and the packet bearer type of skill, can there be the backup relation between these RCF.Because the tranmission techniques of each management domain maybe be different with datum plane QoS mechanism, the realization possibility difference of RCF is like the online RCF of: the RCF on the IP network, MPLS online RCF, the RCF on the Ethernet, ASON etc.

If a management domain deployed a plurality of RCF, then adopt general and extendible protocol interface (as expanding existing standard agreement or developing New Deal) between RCF and the RCF.

General between the RCF of different management domains through the ACF interconnection, adopt general and extendible protocol interface (as expanding existing standard agreement or developing New Deal) between ACF and the RCF.If there is trusting relationship between the territory, can directly link to each other between the RCF of different management domains, as the same interactive information in a management domain.

ACF and RCF are logical functional entities, and the present invention does not limit its physics realization form (as: independent equipment or be integrated in the functional module on other equipment).Aspect compatible, it is the realization of A-ACF on dissimilar Access Networks that PDF among the 3GPP IMS and the GC among the IPCableCom can be considered; It is a kind of realization of C-RCF on IP network that the Bandwidth Broker of Internet2/MSF (BB-Bandwidth Broker) can be considered.

Gq interface: the application function (like the P-CSCF in the IP Multimedia System) that needs the control of transport layer resource in each service sub-system is issued the A-ACF in resource and the admission control subsystem (RACS) to the application of in this carrier network, initiating to the resource requirement of transport layer through Gq interface.The Gq interface that defines among this interface and the 3GPPR6 version IMS is identical or keep compatible.

Go interface: A-ACF carries out door operation, packet labeling, resource reservation, the network address and functions such as port translation, traffic policing through Go interface control Access Border Gateway Function.The Go interface that defines among this interface and the 3GPP R6 version IMS is identical or keep compatible.

G3 interface: I-ACF carries out door operation, packet labeling, resource reservation, the network address and functions such as port translation, traffic policing through G3 interface control I-BGF.The G3 interface is the interface that the present invention increases newly.

Information such as G2 interface: C-RCF collects resources of core network through the G2 interface topology and bandwidth are controlled the functions such as QoS route and resource reservation of C-TPF.The G2 interface is the interface that the present invention increases newly.

Information such as G1 interface: A-RCF collects resources of core network through the G1 interface topology and bandwidth are controlled the functions such as QoS route and resource reservation of A-TPF.The G1 interface is the interface that the present invention increases newly.

Between X1 and X2 interface: A-ACF (access admission control function) and the A-RCF (access-in resource controlled function) through the X1 interface, with C-RCF (core resource controlled function) between mutual and cooperate through X2 interface; Can be that various NGN business provide strict or relative QoS according to application demand to resource availability inspection end to end of the Application and implementation in the carrier network and QoS control.X1 and X2 interface are the interfaces that the present invention increases newly.

Pass through the X3 interactive interfacing between X3 and X4 interface: I-ACF (interconnection admission control function) and the C-RCF; Can be that various NGN business provide strict or relative QoS according to application demand to the Application and implementation resource availability inspection end to end and the QoS control of cross operator network.I-ACF also maybe and the RACS (resource and admission control subsystem) of other carrier networks between through the X4 interactive interfacing, transmit the resource requirement that the cross operator of initiating in this carrier network is used.X3 and X4 interface are the interfaces that the present invention increases newly.

I1 interface: through the I1 interactive interfacing, check user profile (user profi1es) between A-ACF function and the NASS (Network attachment subsystem).If A-ACF does not have the local policy storehouse, the operation policy criteria on the possible remote inquiry strategic server.The I1 interface is the interface that the present invention increases newly.

Id interface: IBCF (interconnection boundary Control function) passes through the Id interactive interfacing with I-ACF, uses the cross operator of in other carrier networks, initiating I-ACF is issued in the resource requirement of transport layer.The Id interface that defines among this interface and the 3GPP R6 version IMS is identical or keep compatible.

The method of A-ACF inspection resource availability.

After A-ACF receives the resource request from Gq interface, mutual through I1 interface and NASS, inspection user profile (user profiles).If A-ACF does not have the local policy storehouse, the operation policy criteria on the also possible remote inquiry strategic server;

If A-RCF is arranged in the Access Network; Then A-ACF is transmitted to resource request through the X1 interface availability of resource in the A-RCF inspection Access Network; Obtain the check result of access network resource availability from A-RCF, possibly carry information such as the mark of distributing to application data stream and path;

If application data stream be get into the core net direction and core net on C-RCF is arranged; Then A-ACF is transmitted to resource request through X2 interface the availability of resource in the C-RCF inspection core net; Obtain the check result of resources of core network availability from C-RCF, possibly carry information such as the mark of distributing to application data stream and path.

The method of I-ACF inspection resource availability.

For the application of cross operator network, after I-ACF receives resource request from the Id interface, the resource availability of the service level agreement (SLA) between inspection operator, operation policy criteria and interconnecting link;

If application data stream be get into the core net direction and core net on C-RCF is arranged; Then I-ACF is transmitted to the availability of resource in the C-RCF inspection core net through the request of X3 interface resource; Obtain the check result of resources of core network availability from C-RCF, possibly carry information such as the mark of distributing to application data stream and path.

For the application in the carrier network, RACS carries out the method for end-to-end QoS control.

Application function is confirmed the resource requirement of application in using constructive process, issues the A-ACF of initiating terminal and destination respectively through Gq interface.

After A-ACF receives resource request, adopt 16 said methods to carry out the inspection of authentication and resource availability, from the resource availability check result that RCF obtains, possibly carry information such as the mark of distributing to application data stream and path.

A-ACF returns to application function to the promise result of resource request through Gq interface.

If authentication is passed through, A-ACF passes through Go interface and controls functions such as the door operation of Access Border Gateway Function, packet labeling, flow mapping, can adopt pre-configured mode or outer packet mode.

For the application of cross operator network, RACS carries out the method for end-to-end QoS control.

In using constructive process, application function is confirmed the resource requirement of application, issues A-ACF through Gq interface; IBCF (interconnecting gateway controlled function) confirms the resource requirement of application, issues I-ACF through the Id interface.

After A-ACF receives resource request, adopt 16 said methods to carry out authentication and resource availability inspection.

After I-ACF receives resource request, adopt 17 said methods to carry out authentication and resource availability inspection.

A-ACF returns to application function to the promise result of resource request through Gq interface.

The promise result that I-ACF asks resource clearly through the Id interface returns to IBCF (interconnecting gateway controlled function).

If authentication is passed through, A-ACF passes through Go interface and controls functions such as the door operation of Access Border Gateway Function, packet labeling, flow mapping, can adopt pre-configured mode or outer packet mode.

If authentication is passed through, I-ACF passes through the G3 interface and controls functions such as the door operation of I-BGF, packet labeling, flow mapping, can adopt pre-configured mode or outer packet mode.

The beneficial effect that technical scheme of the present invention is brought is:

1, the combination technology scheme is described, and accomplishes reasonable;

2, can corresponding 2.1 parts technical problem to be solved describe;

3, can be simple.

RACS can support a plurality of service sub-systems transmission QoS demand of (comprising IP multimedia service subsystem and PSTN/ISDN business simulating subsystem) simultaneously as a logic independent subsystem.

On the basis of the access access control/gate control function (A-ACF) of carrier network edge, introduced interconnection admission control function (I-ACF) at the network boundary place, can realize the QoS control of interconnecting link between different management domains.

Introduced resource control function (RCF), be responsible for availability, QoS route and the resource reservation of inspection Internet resources,, and supported necessary transport layer to measure and protection mechanism with balance network load and congested to prevent the neck of Internet resources (particularly).Introduce RCF and can solve the professional transmission resource contention problem of the inner NGN of each management domain of network.

RACS functional framework provided by the invention adopts the not restriction of which kind of group technology type to transport layer Access Network and core net.Adopt general and extendible protocol interface between ACF and the RCF and between RCF and the RCF, with realize irrelevant.

Above embodiment only is used to explain the present invention, but not is used to limit the present invention.

List of references

[1]IETF?RFC2205(1997)，Resource?reservation?protocol(RSVP)version?1Functional?Specification

[2]IETF?RFC2475(1998)，An?architecture?for?differentiated?services

[3]IETF?RFC2753(1999)，A?Framework?for?policy-based?admission?control

[4]3GPP?TS?23.207，End-to-end?QoS?concept?and?architecture

[5]3GPP?TS?29.207，Policy?control?over?Go?interface

[6]3GPP?TS?29.xxx，Policy?control?over?Gq?interface

[7]ITU-T?J.112，Transmission?systems?for?interactive?cable?televisionservices

[8]ITU-T?J.163，Dynamic?quality?of?service?for?the?provision?of?real?timeservices?over?cable?television?networks?using?cable?modems

[9]Draft?ETSI?ES?2xx?xxx(2004)，TISPAN?NGN?functional?architecture，release1，Implementation?utilizing?an?IMS-based?core

Claims (19)

1. resource and the admission control subsystem among the NGN is characterized in that, comprising:

Access network resource controlled function unit A-RCF: carry out the resource availability inspection;

Insert admission control function unit A-ACF;

Resources of core network controlled function unit C-RCF: carry out the resource availability inspection;

Interconnected admission control function unit I-ACF;

And,

Gq interface:, described access admission control function unit A-ACF is issued in the resource requirement of transport layer to the application of in this carrier network, initiating through Gq interface;

Go interface: described access admission control function unit A-ACF inserts the borde gateway Access Border Gateway Function through Go interface control;

The G3 interface: described interconnected admission control function unit I-ACF controls interconnected borde gateway I-BGF through the G3 interface;

The G2 interface: described resources of core network controlled function unit C-RCF controls core net flow plane C-TPF function through the information of G2 interface collection resources of core network;

G1 interface: the information that described access network resource controlled function unit A-RCF collects access network resource through the G1 interface, the function of control Access Network flow plane A-TPF;

X1 and X2 interface: between described access admission control function unit A-ACF and the access-in resource controlled function unit A-RCF through the X1 interface, with described core resource controlled function unit C-RCF between mutual and cooperates through X2 interface, resource availability inspection end to end of the Application and implementation in the carrier network and QoS are controlled;

X3 and X4 interface: pass through the X3 interactive interfacing between described interconnection admission control function unit I-ACF and the resources of core network controlled function unit C-RCF, to the Application and implementation resource availability inspection end to end and the QoS control of cross operator network; Described interconnection admission control function unit I-ACF through the X4 interactive interfacing, transmits the resource requirement that the cross operator of initiating in this carrier network is used also and between the resource of other carrier networks and the admission control subsystem RACS;

I1 interface: through the I1 interactive interfacing, check user profile user profiles between described access admission control function unit A-ACF and the Network attachment subsystem NASS;

The Id interface: described interconnected admission control function unit I-ACF and interconnection boundary Control function IBCF pass through the Id interactive interfacing, use the cross operator of in other carrier networks, initiating described interconnected admission control function unit I-ACF is issued in the resource requirement of transport layer.

2. resource and admission control subsystem among a kind of NGN according to claim 1 is characterized in that:

Said A-ACF controls said Access Border Gateway Function through said Go interface and carries out door operation, packet labeling, resource reservation, the network address and port translation, traffic policing function; Said I-ACF controls said I-BGF through said G3 interface and carries out door operation, packet labeling, resource reservation, the network address and port translation, traffic policing function; Described resources of core network controlled function unit C-RCF: through the topology and the bandwidth information of G2 interface collection resources of core network, service quality QoS route and the resource reservation function of control core net flow plane C-TPF;

Described access network resource controlled function unit A-RCF: through topology and the bandwidth information that the G1 interface is collected access network resource, QoS route and the resource reservation function of control Access Network flow plane A-TPF.

3. resource and admission control subsystem among a kind of NGN according to claim 1 is characterized in that, and be mutual through I1 interface and NASS after described A-ACF receives the resource request from Gq interface, inspection user profile user profiles;

If A-RCF is arranged in the Access Network; Then A-ACF is transmitted to resource request through the X1 interface availability of resource in the A-RCF inspection Access Network; Obtain the check result of access network resource availability from A-RCF, carry mark and the routing information of distributing to application data stream;

If application data stream be get into the core net direction and core net on C-RCF is arranged; Then A-ACF is transmitted to resource request through X2 interface the availability of resource in the C-RCF inspection core net; Obtain the check result of resources of core network availability from C-RCF, carry mark and the routing information of distributing to application data stream.

4. resource and admission control subsystem among a kind of NGN according to claim 1; It is characterized in that; After described I-ACF receives resource request from the Id interface, the resource availability of the service level agreement SLA between inspection operator, operation policy criteria and interconnecting link;

If application data stream be get into the core net direction and core net on C-RCF is arranged; Then I-ACF is transmitted to the availability of resource in the C-RCF inspection core net through the request of X3 interface resource; Obtain the check result of resources of core network availability from C-RCF, carry mark and the routing information of distributing to application data stream.

5. resource and admission control subsystem among a kind of NGN according to claim 1; It is characterized in that; After described A-ACF receives resource request; Carry out the inspection of authentication and resource availability, from the resource availability check result that RCF obtains, carry mark and the routing information of distributing to application data stream;

A-ACF returns to application function to the promise result of resource request through Gq interface;

If authentication is passed through, A-ACF adopts pre-configured mode or outer packet mode through door operation, packet labeling, the flow mapping function of Go interface control Access Border Gateway Function.

6. resource and admission control subsystem among a kind of NGN according to claim 1 is characterized in that, after described A-ACF receives resource request, carry out the inspection of authentication and resource availability;

After I-ACF receives resource request, carry out the inspection of authentication and resource availability;

A-ACF returns to application function to the promise result of resource request through Gq interface;

I-ACF returns to interconnecting gateway controlled function IBCF to the promise result of resource request through I d interface;

If authentication is passed through, A-ACF adopts pre-configured mode or outer packet mode through door operation, packet labeling, the flow mapping function of Go interface control Access Border Gateway Function;

If authentication is passed through, I-ACF adopts pre-configured mode or outer packet mode through door operation, packet labeling, the flow mapping function of G3 interface control I-BGF.

7. resource and the admittance control method among the NGN is characterized in that:

Insert and carry out authentication based on user profile, operation policy criteria and resource availability after admission control function A-ACF receives resource reservation request, through Go interface the Access Border Gateway Function that is positioned at the access network boundary is controlled according to authenticating result;

Interconnection admission control function I-ACF carries out authentication based on the service level agreement SLA between operator, operation policy criteria and resource availability, the I-BGF that is positioned at the core network boundary is controlled through the G3 interface according to authenticating result;

Access network resource controlled function A-RCF collects the information of access network resource through the G1 interface; Resource reservation in the Control Network; Maintenance resources availability and resource allocation status database; Resource availability according to from A-ACF is checked request, checks and resource allocation based on the resource status database, and upgrades resource allocation status and return resource availability inspection affirmation;

Resources of core network controlled function C-RCF collects the information of resources of core network through the G2 interface; Resource reservation in the Control Network; Maintenance resources availability and resource allocation status database; Resource availability according to from A-ACF or I-ACF is checked request, checks and resource allocation based on the resource status database, and upgrades resource allocation status and return resource availability inspection affirmation.

8. resource and admittance control method among a kind of NGN according to claim 7 is characterized in that: the Access Border Gateway Function that is positioned at the access network boundary through Go interface control according to authenticating result is carried out door and is opened or closed, goes out that resource allocation and RSVP, IP address and port assignment and conversion, the supervision of entering flow, the IP address of packet labeling, upstream and downstream flow of flow is anti-cheats, uses measurement function.

9. resource and admittance control method among a kind of NGN according to claim 7 is characterized in that: carry out door operation, packet labeling, resource reservation, the network address, port translation, traffic policing function according to authenticating result through the I-BGF that the control of G3 interface is positioned at the core network boundary.

10. resource and admittance control method among a kind of NGN according to claim 7 is characterized in that, access network resource information comprises: topology and bandwidth information; Resources of core network information comprises: topology and bandwidth information.

11. resource and admittance control method among a kind of NGN according to claim 7 is characterized in that, in each management domain, dispose one or more RCF according to the network size and the packet bearer type of skill, have the backup relation between these RCF.

12. resource and admittance control method among a kind of NGN according to claim 11 is characterized in that, if a management domain deployed a plurality of RCF, then adopt general and extendible protocol interface between RCF and the RCF.

13. resource and admittance control method among a kind of NGN according to claim 7 is characterized in that, and be general through the ACF interconnection between the RCF of different management domains, adopts general and extendible protocol interface between ACF and the RCF.

14. resource and admittance control method among a kind of NGN according to claim 13 is characterized in that, if having trusting relationship between different management domain, directly link to each other between the RCF of different management domains, as the same interactive information in a management domain.

15. resource and admittance control method among a kind of NGN according to claim 7 is characterized in that, ACF and RCF are logical functional entities.

16. resource and admittance control method among a kind of NGN according to claim 7 is characterized in that, the step of A-ACF inspection resource availability comprises:

After A-ACF receives the resource request from Gq interface, mutual through I1 interface and NASS, inspection user profile user profiles; If A-ACF does not have the local policy storehouse, the operation policy criteria on the remote inquiry strategic server;

If A-RCF is arranged in the Access Network; Then A-ACF is transmitted to resource request through the X1 interface availability of resource in the A-RCF inspection Access Network; Obtain the check result of access network resource availability from A-RCF, carry mark and the routing information of distributing to application data stream;

If application data stream be get into the core net direction and core net on C-RCF is arranged; Then A-ACF is transmitted to resource request through X2 interface the availability of resource in the C-RCF inspection core net; Obtain the check result of resources of core network availability from C-RCF, carry mark and the routing information of distributing to application data stream.

17. resource and admittance control method among a kind of NGN according to claim 7 is characterized in that, the step of I-ACF inspection resource availability comprises:

For the application of cross operator network, after I-ACF receives resource request from the Id interface, the resource availability of the service level agreement SLA between inspection operator, operation policy criteria and interconnecting link;

If application data stream be get into the core net direction and core net on C-RCF is arranged; Then I-ACF is transmitted to the availability of resource in the C-RCF inspection core net through the request of X3 interface resource; Obtain the check result of resources of core network availability from C-RCF, carry mark and the routing information of distributing to application data stream.

18. resource and admittance control method among a kind of NGN according to claim 7 is characterized in that, for the application in the carrier network, the step that RACS carries out end-to-end QoS control comprises:

Application function is confirmed the resource requirement of application in using constructive process, issues the A-ACF of initiating terminal and destination respectively through Gq interface;

After A-ACF receives resource request, carry out the inspection of authentication and resource availability, from the resource availability check result that RCF obtains, carry mark and the routing information of distributing to application data stream;

A-ACF returns to application function to the promise result of resource request through Gq interface;

If authentication is passed through, A-ACF adopts pre-configured mode or outer packet mode through door operation, packet labeling, the flow mapping function of Go interface control Access Border Gateway Function.

19. resource and admittance control method among a kind of NGN according to claim 7 is characterized in that, for the application of cross operator network, the step that RACS carries out end-to-end QoS control comprises:

In using constructive process, application function is confirmed the resource requirement of application, issues A-ACF through Gq interface; Interconnecting gateway controlled function I BCF confirms the resource requirement of application, issues I-ACF through I d interface;

After A-ACF receives resource request, carry out the inspection of authentication and resource availability;

After I-ACF receives resource request, carry out the inspection of authentication and resource availability;

A-ACF returns to application function to the promise result of resource request through Gq interface;

I-ACF returns to interconnecting gateway controlled function IBCF to the promise result of resource request through the Id interface;

If authentication is passed through, A-ACF adopts pre-configured mode or outer packet mode through door operation, packet labeling, the flow mapping function of Go interface control Access Border Gateway Function;

If authentication is passed through, I-ACF adopts pre-configured mode or outer packet mode through door operation, packet labeling, the flow mapping function of G3 interface control I-BGF.

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