CN101163102B

CN101163102B - Resource admission control method and policy decision functional unit

Info

Publication number: CN101163102B
Application number: CN2007101481009A
Authority: CN
Inventors: 刘波; 薛莉莉; 邹婷; 吕珍珠
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-10-10
Filing date: 2006-10-10
Publication date: 2010-07-21
Anticipated expiration: 2026-10-10
Also published as: CN101163102A

Abstract

The invention discloses a resource receiving control method, which includes that a strategy decision-making function unit receives a service request. According to the service request, the strategy decision-making function unit identifies a load-bearing control module; and selects corresponding service logic according to the load-bearing control module; and processes the resource receiving and control. In the technical proposal of the invention, no matter requesting resource to the fixed access net defined in a TISPAN, or to the wireless access net defined in a 3 GPP, the load-bearing control modules are all identified by the strategy decision-making function unit xPDF. The strategy decision-making function unit xPDF selects corresponding service logic and processes the resource receiving and control. The xPDF hides the detail of the access net from an AF and simplifies the networking proposal; so the system maintenance becomes simple and convenient.

Description

A kind of resource acceptance control method and strategy decisive function unit

Technical field

The present invention relates to the communications field, relate in particular to a kind of resource acceptance control method and strategy decisive function unit.

Background technology

Resource and accommodation control subsystem that ETSI TISPAN proposes belong to bearer control layer, policy control, resource reservation, admittance control have been realized, and insert, converge, network address port/protocol translation in the core net, resource and accommodation control subsystem framework as shown in Figure 1, wherein:

RACS is resource and accommodation control subsystem (resource and admission controlsub-system), comprise that SPDF is (based on the strategy decisive function of business, service-based policy decisionfunction) unit and Access-Resource and Admission Control Function (access-in resource and accommodating control function, access-resource andadmission control function) unit, AF (application function, application function) unit, NASS (Network Attachment Subsystem, network attachment sub-system), AN (access node, Access node), RCEF (Resource Control Enforcement Function, resource control enforcement function) unit, BGF (Border Gateway Function, the border gateway function) functional unit that the unit is relevant with RACS.

RACS is the subsystem of implementation strategy control among the NGN, resource reservation, admittance control, and RACS also supports the control to NAT among the BGF.RACS provides based on the transmission control of strategy to application layer and has served, and application layer realizes admittance control, application, the reservation of the bearing resource in its compass of competency by RACS.

In 3GPP R7 with the SBLP among the 3GPP R6 (based on the local policy of business, service basedlocal policy) and FBC (based on stream charging, flow based charging) merges formation PCC (strategy and the control of chargeing, policy and charging control) scheme, the PCC scheme as shown in Figure 2, wherein:

Function relevant with policy control among the PCC comprises:

" gate " function: just allow or forbid the ability that the grouping bag (packet) of a business data flow (SDF, service data flows) passes through.No matter whether used charge control and policy control functions, can go up in certain session (session) and use " gate " function.

The Session incident: for the notice and the respond of application-layer events, this ability can trigger new user's face behavior.In order to use gate control function, must possess the Session Event Function.For example in gate control function, Session stops incident can trigger corresponding packet prohibitive behavior.

The QoS authorization function: the maximum QoS that authorizes QoS to refer at some IP stream authorizes.When in a bearer, having a plurality of IP stream, can be combined in together the mandate QoS of these streams, as the mandate QoS of this carrying (bearer).Can assist concrete QoS Authorized operation (comprising acceptance, refusal or modification) by using the relevant CAMEL-Subscription-Information of QoS.

The QoS that QoS carries out function: PCC (strategy and the control of chargeing, policy and charging control) carry out function must and the function of the middle PEP of SBLP (based on the local policy of business, service based local policy) be consistent.QoS carries out function and is included in bearer (gateway is gateway) to the bearer QoS of the request processing of demoting by GW when setting up.PCRF ("Policy and Charging Rules Function, policy andcharging rules function) also can provide to GW by the Gx+ reference point on one's own initiative according to some trigger condition and authorize QoS information and transfer to its execution.

Relevant function comprises with chargeing:

Charge associated: be supported in carry out between application layer is chargeed and bearing bed charges charge associated.

Charge and control: based on charging regulation, IP stream is identified out, and carries out corresponding billing operation.In this process, also need to consider the CAMEL-Subscription-Information of being correlated with.Charging regulation among the new PCC may dynamically be provided by PCRF, also may be pre-configured among the GW.

The realization of SPDF functional entity in the TISPAN RACS standard has been arranged in the prior art, and the realization of PCRF functional entity in the 3GPPPCC standard.The realization of SPDF and PCRF all needs to provide interface to application level function AF, and AF passes through this interface to bearer control layer application resource.

In the RACS standard, interface between SPDF and the AF is a Gq ' interface, type of message on the interface has: AAR (authorization identifying request, AA-Request)/AAA (authorization identifying response, AAA AA-Answer), RAR (authorization identifying request again, re-authentication and/or re-authorization Request/RAA (authorization identifying response again), STR (conversation end request, Session-Termination-Request)/and STA (the conversation end response, Session-Termination-Answer), ASR (stops conversation request, Abort-Session-Request)/and ASA (the termination conversational response, Abort-Session-Answer).For all containing identical＜Session-Id in all message in the same session 〉,＜Session-Id〉be used for identifying same session.

In the PCC scheme, the interface between PCRF and the AF is Rx interface, and the type of message on the interface has: AAR/AAA, RAR/RAA, STR/STA, ASR/ASA.For all containing identical＜Session-Id in all message in the same session 〉,＜Session-Id〉be used for identifying same session.

(fixing and mobile communication merges at FMC, fixed-mobile convergence) in the application, comprised the fixing access of xDSL, and multiple mobile access way such as UMTS RAN access, wiMAX access, W-LAN access, according to existing implementation, need the SPDF functional entity to support the resource under the fixing access way and admit control, the PCRF function is supported the resource under the mobile access way and is admitted control, and adopt two to overlap the bearer control layer entities, be unfavorable for the enforcement and the maintenance of network, also be not easy to AF and realize carrying control.

Summary of the invention

The embodiment of the invention is to provide a kind of resource acceptance control method and strategy decisive function unit, in order to solving the employing two cover bearer control layer entities that exist in the prior art, and the networking that brings and safeguard complicated problems.

A kind of resource acceptance control method that the embodiment of the invention provides comprises:

The strategy decisive function unit receives service request, comprises carrying control model field in the described service request;

The carrying control model is discerned according to the carrying control model field in the described service request in described strategy decisive function unit, and selects the corresponding service logic to carry out resource and admission and control according to described carrying control model.

A kind of strategy decisive function unit, after receiving service request, described strategy decisive function unit carries control model according to described service request identification, and selects the corresponding service logic to carry out resource and admission and control according to described carrying control model.

Beneficial effect of the present invention is as follows:

Adopt technical scheme of the present invention, no matter be the fixed access network that in TISEAN, defines, or the wireless access network request resource that in 3GPP, defines, all discern the carrying control model according to service request by strategy decisive function unit xPDF, and select the corresponding service logic to carry out resource and admission and control, xPDF has simplified networking plan, and has made system maintenance become simple and convenient to the details that AF hides Access Network.

Description of drawings

Fig. 1 is based on the resource of fixed network access style and the configuration diagram of accommodation control subsystem and network of relation environment in the prior art;

Fig. 2 is based on the resource of mobile network access style and the configuration diagram of accommodation control subsystem and network of relation environment in the prior art;

Fig. 3 is the connection diagram of resource acceptance control system in network among the present invention program;

Fig. 4 is the structural representation of xPDF among the present invention program;

Fig. 5 is the further refined structure schematic diagram of xPDF among the present invention program;

Fig. 6 is the refined structure schematic diagram of service control function unit among the present invention program;

Fig. 7 is a schematic flow sheet of the present invention;

Fig. 8 sets up schematic flow sheet for the session that AF among the PCRF in the prior art initiates;

Fig. 9 is the resource request schematic flow sheet that AF initiates among the SPDF in the prior art;

Figure 10 is for adopting the resource request schematic flow sheet that AF initiates among the present invention program xPDF.

Embodiment

Below in conjunction with Figure of description the specific embodiment of the present invention is described.

Merge under (FMC fixed-mobile convergence) scene in fixing and mobile communication, operation layer need be controlled fixed access network and mobile Access Network simultaneously by carrying control, therefore need to support that fixedly access scheme is wanted and supported mobile access scheme to merge, make bearer control layer provide unified interface to application layer, shield the difference of different access waies to application function, shielding is to the different control modes of various access waies, shielding fixedly access scheme is moved access scheme and is controlled in resource, admit control, the difference of charging aspect, and can compatible resource control and admittance control mode in the past.So just having solved existing FMC needs to dispose the networking that two cover entity of carrying control function bring in using and safeguards complicated problems.

As shown in Figure 3, be the system architecture schematic diagram of the present invention program when using, this scheme merges SPDF and PCRF, and the resource acceptance control system after the fusion provides the resource control interface by unified Rx+ interface to application level function.

For simplicity, represent to realize the strategy decisive function unit of SPDF and PRCF function among the embodiment with xPDF, for continuing existing scheme, the interface of itself and operation layer AF is Rx+, and Rx+ adopts the diameter agreement.

The AAR message definition of Rx+ interface is as follows:

<AA-Request>::＝<Diameter?Header:265，REQ，PXY>

＜Session-Id〉(session identification)

{ Auth-Application-Id} (application identities)

{ Origin-Host} (source host)

{ Origin-Realm} (territory, source)

{ Destination-Realm} (purpose territory)

[Access-Id] (access way identification)

[Tran-Control-Mode] (carrying control model)

* [Media-Component-Description] (media component description)

* [Flow-Grouping] (stream packets)

[AF-Charging-Identifier] (AF charging identifier)

[SIP-Forking-Indication] (indication of SIP bifurcated)

* [Specific-Action] (specific operation)

[User-Name] (user name)

[Binding-Information] (binding information)

[Latching-Indication] (locking indication)

[Reservation-Priority] (reservation priority)

[Globally-Unique-Address] (the unified address of the overall situation)

[Authorization-Lifetime] (authorizing the lifetime)

* [Proxy-Info] (proxy information)

* [Route-Record] (route record)

* [AVP] other property value is to (AVP, attribute-value pair)

The same with prior art, the Session-Id information of message that belongs to same session is identical.The present invention needs the xPDF can be from setting up first message of session--and identifying the-AAR message is that to select be control fixed access network or mobile Access Network, follow-up xPDF just can correctly select the flow process of SPDF or PCRF to realize reservation, admittance control and the policy control of resource according to Session-Id information in the subsequent message, therefore remove AAR message, other message AAA on the Rx+ interface, RAR/RAA, STR/STA, the definition of ASR/ASA reservation and Gq ' and Rx interface is constant.

The Access-Id field can be defined as the AVP (the AVP type codes is to be allocated) of enumeration type.Access-Id is used for identifying and discerning the type of Access Network, and its a kind of definition mode is as follows.

XDSL inserts, and value can be defined as 0;

GGSN moves Access Network, and value can be defined as 1;

The WLAN fixed access network, value can be defined as 2;

WLAN moves Access Network, and value can be defined as 3;

The WiMAX fixed access network, value can be defined as 4;

WiMAX moves Access Network, and value can be defined as 5.

By can also defining other access network type to the expansion of enumerated value, and the purpose that in Rx+, increases the Access-Id property value to be xPDF just can identify this business according to the assignment of Access-Id field when each session begins be to control fixed access network or mobile Access Network.

The present invention can also become the Tran-Control-Mode Field Definition AVP (the AVP type codes can be to be allocated) of enumeration type.The Tran-Control-Mode field is used to refer to the carrying control model, and the carrying control model is used to refer to xPDF and which kind of mode carries out carrying control with, for example is to push (push) mode or draw (pull) mode, is on-path mode or off-path mode.

Under specific scene, the property value of the User-Name field among the AAR, Subscription-ID field, Globally-Unique-Address field also can be used for discerning access network type, discerns access network type such as the corresponding relation of the span that can utilize above-mentioned field and access network type.If User-Name property value, Subscription-ID property value or field Globally-Unique-Address property value can identify different access network types, the span of above-mentioned field and the corresponding relation of access network type are organized into following form:

User-Name	Access network type
User-Name	Access network type	Zhang San	xDSL

Li Si

WiMAX

?Subscription-ID	Access network type
?Subscription-ID	Access network type	?139xxxxxxxx	?GGSN

?Subscription-ID	Access network type
?Subscription-ID	Access network type	?2887xxxx	?xDSL

?Globally-Unique-Address	Access network type
?Globally-Unique-Address	Access network type	?10.20.x.x	?xDSL
?20.20.x.x	?GGSN	?10.20.x.x	?xDSL

Table 1

First hurdle of this table 1 is the concrete assignment of corresponding field, and second hurdle is the pairing access network type of this concrete assignment.In actual applications, xPDF looks into above-mentioned table with the concrete value of above-mentioned each field in the AAR message on the Rx+ interface, if find access network type, then can determine to adopt corresponding mode to carry out access network resource control.

A kind of implementation of xPDF as shown in Figure 4, it realizes mainly comprising service control function unit 401, strategy and resource management function unit 402, protocol processes functional unit 403.

After wherein service control function unit 401 receives message from AF from protocol processes functional unit 403, at first check whether be AAR message, to whether comprising the access-id attribute in the AAR message inspection message, if comprise then can determine access network type, thereby select correspondent service logic to carry out resource and admit control according to access-id.

If do not comprise the access-id attribute in the above-mentioned message, then continue to check in the message whether have User-Name, Subscription-ID, Globally-Unique-Address property value, if comprise then table look-up 1 obtaining corresponding access network type, and select correspondent service logic to carry out resource and admit control according to configuration data.If can not find access network type then handle according to default control mode, then handle with default control mode, comprise to AF and return error messages.

If comprise the Tran-Control-Mode field in the above-mentioned message, then xPDF also carries out resource and admits control according to the carrying control model of this field contents correspondence.

In the said process, strategy and resource management function unit 402 provide strategy and resource information to service control function unit 401.

As shown in Figure 5, be the further refined structure of this xPDF, visible above-mentioned protocol processes functional unit 403 further comprises following content:

Diameter interface and adaptation unit 4031 are used for processing diameter protocol;

COPS protocol interface and adaptation unit 4032 are used to handle the COPS agreement;

H.248 protocol interface and adaptation unit 4033 are used to handle H.248 agreement;

Soap protocol interface and adaptation unit 4034 are used for treatment S OAP agreement.

Above-mentioned service control function unit 401 further comprises:

Professional control data piece generation unit 4011, be used for generating professional control data piece after the service request that receives after protocol processing unit is handled, professional control data piece is by＜session-id〉sign, record is carried out in this service request processing, and its state is by 4013 management of condition managing unit.

In the such scheme, service control function unit 401 can also comprise:

Service logic memory cell 4012 is used for the storage service logic;

Condition managing unit 4013 is used for service condition is managed;

Service selection and control unit 4014 are selected service request and are controlled according to strategy and the strategy that provides of resource management function unit and resource information.

As shown in Figure 6, above-mentioned service logic memory cell 4012 further comprises:

PCRF service logic memory cell 40121 is used to store the PCRF service logic;

SPDF service logic memory cell 40122 is used to store the SPDF service logic;

PDF service logic memory cell 40123 is used to store the PDF service logic;

ARACF service logic memory cell 40124 is used to store the ARACF service logic.

Above-mentioned condition managing unit 4013 further comprises:

State machine administrative unit 40131 is used for the state of professional control data piece is managed;

Binding state administrative unit 40132 is used for binding relationship professional and rule is managed;

Session connection administrative unit 40133 is used for service conversation connected and manages;

Routing management unit 40134 is used for the route of carrying inter-entity is managed.

Above-mentioned strategy and resource management function unit 402 further comprise:

Business game storehouse 4021 is used for the storage service strategy;

Network strategy storehouse 4022 is used for the storage networking strategy;

Access Control Policy storehouse 4023 is used to store Access Control Policy;

User's subscription rules storehouse 4024 is used to store user's subscription rules;

Carrying control routing table unit 4025 is used for storage carrying control routing iinformation;

Bearer network topological sum Resource Unit 4026 is used for storage networking topological sum resource information.

The strategy or the resource information of above-mentioned each element memory storage can offer service control function unit 401 according to actual needs.

In the such scheme, xPDF further comprises:

Access-Resource and Admission Control Function interface unit 4041 is used to the interface that provides mutual with Access-Resource and Admission Control Function;

C-BGF interface unit 4042 is used to the interface that provides mutual with C-BGF;

PCEF interface unit 4043 is used to the interface that provides mutual with PCEF;

I-BGF interface unit 4044 is used to the interface that provides mutual with I-BGF.

In the such scheme, at AF, can also AF interface unit 405 be set at xPDF, this AF interface unit can have the different plans of establishment:

If the Session-Id information or the Tran-Control-Mode field information that carry in the service request of xPDF by the AF transmission are discerned access network type information, then this AF interface unit can be set to unified interface unit;

If AF self can discern access network type, then can be at a plurality of different AF interface units of xPDF setting at different access network types, this AF interface unit 405 is at different access network type settings, judge access network type by AF like this, and service request is sent to different AF interface units according to different access network types, needn't discern access network type according to service requesting information, and directly discern access network type according to different port numbers by xPDF.

Such scheme, handle as follows to service request from AF:

Professional control data piece generation unit 4011 is set up a professional control data piece after receiving the AAR message that the protocol processes functional unit handles, professional control data piece is identified by session-id, the state of professional control data piece is by 40131 management of state machine administrative unit, binding relationship professional and rule is managed by binding state administrative unit 40132, service conversation is by 40133 management of session connection administrative unit, and the route between the carrying controlled entity is by 40134 management of routing management unit.

Above-mentioned business request information is if not AAR message, belong to SPDF and the proprietary separately operation flow of PCRF if can identify according to this message, then service selection and control selected cell are handled according to flow process separately, otherwise find corresponding service control data piece according to the session-id in the message, realize carrying control according to the message content of corresponding state machine and reception.

The policing rule that needs in the professional control procedure, carry topological resource, carrying control route data is searched to strategy and resource management function unit 403 by service selection and control unit 4014.

This shows, compare with existing scheme, traditional SPDF and PCRF only realize SPDF and PCRF function separately, do not need to realize service selection and control unit or similar function, and the present invention program can comprehensively realize above-mentioned SPDF and PCRF function, has overcome because multiple access style causes having the drawback of multiple resource and admission and control support framework and scheme.

As shown in Figure 7, be a schematic flow sheet of the present invention, as seen from the figure, the present invention mainly may further comprise the steps:

Step 701, application function unit send service request to the strategy decisive function unit;

Step 702, strategy decisive function unit are according to described service request identification access network type, and according to described access network type, selection corresponding service logic is carried out resource and admission and control.

Insert if the described access network type of step 703 is a fixed network, then carry out resource and admission and control according to strategy and decision making function SPDF flow process based on business;

If being mobile network, the described access network type of step 704 inserts, then according to carrying out resource and admission and control based on "Policy and Charging Rules Function PCRF flow process.

In the above-mentioned service request, comprise and insert sign Access-Id field, carry described access network type information by described access sign Access-Id.

In the above-mentioned service request, can also comprise user name User-Name field, the unified address of the user ID Subscription-ID field or whole world Globally-Unique-Address field, corresponding access network type is discerned according to the span of this field in described strategy decisive function unit.

In the such scheme, if described service request kind is also carried the carrying control model, then can also comprise the strategy decisive function unit in this flow process according to described service request identification carrying control model, and select the corresponding service logic to carry out resource and admission and control according to described carrying control model.

This city can be arranged in the described service request in control model information, carries carrying control model information by carrying control model Tran-Control-Mode field.

In the such scheme, can also discern access network type by the application function unit, and according to identification after access network type service request is sent to different AF interface units, xPDF can handle according to this access network type of determining, so just needn't discern access network type according to service requesting information, and directly according to port numbers identification access network type.

In actual applications, the flow process that PCRF is relevant has a lot, be divided into IP-CAN session foundation, termination and modification process class, according to different situations and scene a lot of flow processs are arranged in every class, some is the distinctive flow process of PCRF, just can identify according to the message of first initiation is the operation flow of PCRF, and some is similar with the professional control flow among the SPDF, can distinguish with the method among the present invention.SPDF too, some are distinctive flow processs among the SPDF, just can identify according to the message of first initiation to belong to the SPDF flow process, the operation flow among some and the PCRF is similar, can distinguish with the method among the present invention.

As shown in Figure 8, be that flow process is set up in the session that AF initiates among the PCRF, comprising:

Step 801, AF last service needed request trigger policy and the control of chargeing;

Step 802, AF generate the relevant business information of carrying control according to the contextual information of using;

Step 803, request is sent to PCRF by AAR message;

Step 804, the information that the business of preserving is correlated with on PCRF;

Step 805, if desired the user with order relevant information, then ask to SPR;

Step 806, SPR response request are returned the user and are ordered relevant information;

Step 807, identification have influence on the session on which IP-CAN;

Step 808, use local configured strategy, make a strategic decision according to information, user and ordering information that business is relevant;

Step 809, control strategy and charging regulation are issued to GW by RAR message;

Step 810, GW installation/modification/deletion PCC rule, and implementation strategy;

Step 811, GW are by the RAA message response;

Step 812, upgrade that QoS authorizes or timer if desired, GW starts and upgrades PDP Context;

Step 813, PCRF response AAA message are given AF.

As shown in Figure 9, be the resource request flow process that AF initiates among the SPDF, comprising:

Need to trigger carrying control on step 901, the AF;

Step 902, admit control to the SPDF request resource by AAR;

Step 903, SPDF check mandate, determine strategy;

Step 904, control to Access-Resource and Admission Control Function request access-in resource;

Step 905, Access-Resource and Admission Control Function use local policy, and determining whether will be to the RCEF distributing policy;

Step 906, Access-Resource and Admission Control Function be if desired to the RCEF distributing policy, by AAR to the RCEF distributing policy;

Step 907, RCEF response policy installation situation;

Step 908, Access-Resource and Admission Control Function are to SPDF response access-in resource request results;

Step 909, SPDF issue gateway control strategy (such as gate, address transition etc.) to BGF;

Step 910, BGF response request;

Step 911, SPDF response request.

As shown in figure 10, be to adopt the resource request flow process that AF initiates among the present invention program xPDF, comprising:

Step 1001, AF trigger the resource control request according to business demand;

Step 1002, AF give xPDF by AAR message down distributing resource control request;

Step 1003, xPDF judge adopt which kind of access-in resource control flow according to information in the AAR message;

Step 1004 is if the PCRF flow process is then carried out carrying control according to operation flow among Fig. 8;

If step 1005 is if the SPDF flow process is then carried out carrying control according to operation flow among Fig. 9.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. resource acceptance control method comprises:

2. the method for claim 1 is characterized in that, described carrying control model comprises propelling movement push/ and lifts the pull mode, or is total to road on-path/ with road off-path mode.

3. strategy decisive function unit, it is characterized in that, after receiving the service request that comprises carrying control model field, the carrying control model is discerned according to the carrying control model field in the described service request in described strategy decisive function unit, and selects the corresponding service logic to carry out resource and admission and control according to described carrying control model.

4. strategy decisive function as claimed in claim 3 unit is characterized in that, described carrying control model comprises propelling movement push/ and lifts the pull mode, or is total to road on-path/ with road off/path mode.