CN101282351B - Resource admission control subsystem as well as method for transmitting resource decision required message - Google Patents
Resource admission control subsystem as well as method for transmitting resource decision required message Download PDFInfo
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Abstract
The invention claims a resource receiving control subsystem and a method of sending resource decision request information, which is applied to the pull model of the resource receiving control subsystem, including an A-RACF module and an SPDF module. The A-RACF module comprises a discovery device based on the strategy decision functional module of the service. The discovery device based on the strategy decision functional module of the service is used for finding the proper SPDF module according to the corresponding discovery strategy under the condition of the interaction of the A-RACF module and multiple SPDF modules. Adopting the invention can achieve the function that the A-RACF module discovers the SPDF module, and the A-RACF module can send the request to the proper SPDF module.
Description
Technical field
The present invention relates to the communications field, relate more specifically to the method for a kind of Resource and Admission Control Sub-system and transmission resource decision request message.
Background technology
NGN (Network Generation Network, next generation network) is a hot research problem in current communication standard field, and it adopts the technology of dividing into groups such as IP as communication of Bearer Network converged fixed and mobile communication.NGN can provide abundanter multimedia service; As has an emerging service (like VoIP, video conference, multimedia remote teaching, video request program etc.) of real-time requirement; These business need communication networks can provide efficiently service quality (Quality of Service, QoS) support end to end; The user is also increasingly high to the requirement of network service quality simultaneously.Therefore, how providing end to end, QoS will be one of key problem of NGN.
TISPAN (Telecommunication and Intemet converged Services and Protocolsfor Advanced Networking; Be used for the communication of high-level network and the business and the agreement of internet converged) set up the particular study group; Be devoted to the formulation work of NGN technical standard; TISPAN is divided into operation layer and transport layer with the NGN framework; NASS (Network AttachmentSubSystem, Network Attachment Subsystem) and RACS (Resource and Admission ControlSubsystem, Resource and Admission Control Sub-system) have been introduced at transmission control layer; NASS is responsible for the upper-layer service layer independent user access-in management is provided, and RACS then solves the QoS problem of NGN bearer network.
The function structure of TISPAN RACS is as shown in Figure 1.RACS is associated the resource requirement of operation layer with the resource allocation of network carrying layer, mainly accomplish functions such as policy control, resource reservation, admittance control, NAT (Network Address Transla=tion, network address translation) pass through.RACS is the control service that operation layer provides transport layer through a series of qos policys, makes user terminal can obtain the required service quality assurance.
RACS is made up of two entities: SPDF module (Service-based Policy DecisionFunction; Strategy decisive function based on business) and Access-Resource and Admission Control Function module (Access-Resource andAdmission Control Function, accommodating access resource controlled function).
● the SPDF module
The SPDF module provides unified interface to application layer, and the concrete access style of shielding bottom-layer network topological sum provides the policy control based on business.The SPDF module is according to applied function module (Application Function; AF) local policy is selected in request; And request is mapped to IPQoS (Quality ofService, service quality) parameter, send to Access-Resource and Admission Control Function module and BGF module (Border Gateway Function; Border Gateway Function), to control corresponding resource.
● the Access-Resource and Admission Control Function module
Access-Resource and Admission Control Function control Access Network has the function that control of admitting and network strategy converge.From SPDF module reception request, realize admitting control based on the strategy of being preserved then, acceptance or refusal are to transmitting the request of resource.The Access-Resource and Admission Control Function module obtains network attachment information and user QoS inventory information through the e4 reference point from Network Attachment Subsystem (NASS); Thereby can confirm available network resources according to network location information (for example inserting the address of user's physical node), simultaneously when the processing resource allocation request with reference to user QoS inventory information.
Comprise two kinds of functional entitys in the transport layer: BGF module (Border Gateway Function, Border Gateway Function) and RCEF module (Resource Control Enforcement Function, Resource Control Enforcement Function).
● the BGF module
The BGF module is a bag (Packet-to-packet) gateway, can between Access Network and core net (realization Core Border Gateway Function), also can between two core net, (realize interconnected Border Gateway Function).The BGF module accomplishes under the control of SPDF module that NAT passes through, gate, QoS mark, bandwidth constraints, use measurement and source synchronous function.
●RCEF
The RCEF module is implemented two layers/three layers (L2/L3) Media Stream strategy that the Access-Resource and Admission Control Function module sends through the Re reference point, accomplishes functions such as gate, QoS mark, bandwidth constraints.
● BTF (transmission equipment)
BTF comprises two kinds of basic transmission process functions: basic forwarding capability (ElementaryForwarding Functions, EFF) with basic controlled function (Elementary ControlFunctions, ECF).
Resource and Admission Control Sub-system is supported the QoS resource control mode of " drawing (PULL) " and " pushing away (PUSH) " dual mode, with adapt to different types of user devices (Customer PremisesEquipment, CPE).
So-called push-model is meant that application function AF is that the business initiated of subscriber equipment is to Resource and Admission Control Sub-system request QoS resource authorization and resource reservation; If this request can be satisfied, then Resource and Admission Control Sub-system initiatively is pushed to transfer function to obtain to transmit accordingly resource with decision-making.
So-called pull-mode is meant the business of subscriber equipment initiation to Resource and Admission Control Sub-system request QoS resource authorization and resource reservation, and active was made a strategic decision to the Resource and Admission Control Sub-system request when transfer function was received the transport layer signaling message.
Wherein pull-mode mainly is divided into pre-authorization (Authorization), reserves (Reservation), carries out (Commitment) three processes, and latter two process generally can be merged into a flow process.Pre-authorization is to be initiated by CPE, and application function triggers the request of generation; And reserve, carry out is to be initiated by CPE, and transfer function triggers and generates resource request.
Prior art and existing problems:
The Resource and Admission Control Sub-system support pushes away and draws two kinds of patterns, and Fig. 2 has described the resource and admission control flow chart under the TISPAN RACS pull-mode, may further comprise the steps,
Step 201, CPE passes through the transport layer signaling message of path coupling directly to the BTF request resource.The resource request triggers BTF that CPE initiates sends a resource request message;
Step 202, BTF sends resource request message and gives the RCEF module;
Step 203, the RCEF module sends to the Access-Resource and Admission Control Function module with the resource decision request message, to ask corresponding resource policy;
Step 204, Access-Resource and Admission Control Function module check to this resource decision request that according to user's CAMEL-Subscription-Information inspection sends the resource decision request message for the SPDF module through the back, and the SPDF module is according to the decision-making of being generated strategy by the policing rule of Virtual network operator definition.
Because it is a plurality of that the SPDF module can be arranged based on different business types, so there is many-to-one scene in SPDF module and Access-Resource and Admission Control Function module, and the networking sketch map is as shown in Figure 3.In this case, after the Access-Resource and Admission Control Function module is received the resource decision request, need suitable SPDF module be mail in request according to certain discovery mechanism.
In the prior art, because the Access-Resource and Admission Control Function module does not define the function of finding the SPDF module, so in the flow process scene of foregoing description, the Access-Resource and Admission Control Function module just can not mail to suitable SPDF module with request.
Summary of the invention
Technical problem to be solved by this invention provides the method for a kind of Resource and Admission Control Sub-system and transmission resource decision request message, has realized the function of Access-Resource and Admission Control Function module discovery SPDF module, and the Access-Resource and Admission Control Function module can mail to suitable SPDF module with request.
In order to address the above problem, the invention provides a kind of Resource and Admission Control Sub-system, be applied in the pull-mode of Resource and Admission Control Sub-system, comprise accommodating access resource controlled function Access-Resource and Admission Control Function module and based on the strategy decisive function SPDF module of business,
Said Access-Resource and Admission Control Function module comprises the discovery device based on the policy functional module of business; Should be used for based on discovery device of the policy functional module of business under the mutual situation of Access-Resource and Admission Control Function module and a plurality of SPDF module, finding suitable SPDF module according to corresponding discovery strategy.
Further, above-mentioned Resource and Admission Control Sub-system also can comprise, the discovery device of said policy functional module based on business comprises the static configuration discovery strategy according to corresponding discovery strategy,
The static configuration discovery strategy is meant just does corresponding configuration before mutual between Access-Resource and Admission Control Function module and the SPDF module; Be that the interior Access-Resource and Admission Control Function module of a certain physical region is only mutual with the SPDF module of regulation; When the Access-Resource and Admission Control Function module is received the resource decision request message that transmission equipment sends, just this resource decision request message is mail to the SPDF module of regulation; Perhaps the SPDF module disposes according to the IP address, the request in the promptly different SPDF resume module different IP addresses scopes, and the Access-Resource and Admission Control Function module just can mail to corresponding SPDF module according to the IP address information of carrying in the resource decision request message.
Further, above-mentioned Resource and Admission Control Sub-system also can comprise, the discovery device of said policy functional module based on business also comprises dynamic generation discovery strategy according to corresponding discovery strategy,
Dynamically generate discovery strategy and be meant the pre-authorization stage under resource and admission control pull-mode; After the SPDF module notice Access-Resource and Admission Control Function module; The Access-Resource and Admission Control Function module will be preserved the relevant information of SPDF module, reserve and the execution phase, and the Access-Resource and Admission Control Function module is located suitable SPDF module according to the information of preserving.
Further, above-mentioned Resource and Admission Control Sub-system also can comprise, the discovery device of said policy functional module based on business also is used for after finding suitable SPDF module, sends the resource decision request message for this SPDF module.
The present invention also provides a kind of method of sending the resource decision request message, is applied in the pull-mode of Resource and Admission Control Sub-system, and said Resource and Admission Control Sub-system comprises Access-Resource and Admission Control Function module and SPDF module,
If Access-Resource and Admission Control Function module and a plurality of SPDF module are mutual, then said Access-Resource and Admission Control Function module finds suitable SPDF module according to corresponding discovery strategy, and sends the resource decision request message for this SPDF module;
If Access-Resource and Admission Control Function module and a plurality of SPDF module are mutual, and the Access-Resource and Admission Control Function module can't select suitable SPDF module, and then the Access-Resource and Admission Control Function module sends to all mutual with it SPDF modules with said resource decision request message.
Further, said method also can comprise, said discovery strategy comprises the static configuration discovery strategy,
The static configuration discovery strategy is meant just does corresponding configuration before mutual between Access-Resource and Admission Control Function module and the SPDF module; Be that the interior Access-Resource and Admission Control Function module of a certain physical region is only mutual with the SPDF module of regulation; When the Access-Resource and Admission Control Function module is received the resource decision request message that transmission equipment sends, just this resource decision request message is mail to the SPDF module of regulation; Perhaps the SPDF module disposes according to the IP address, the request in the promptly different SPDF resume module different IP addresses scopes, and the Access-Resource and Admission Control Function module just can mail to corresponding SPDF module according to the IP address information of carrying in the resource decision request message.
Further, said method also can comprise, said discovery strategy also comprises dynamic generation discovery strategy,
Dynamically generate discovery strategy and be meant the pre-authorization stage under resource and admission control pull-mode; After the SPDF module notice Access-Resource and Admission Control Function module; The Access-Resource and Admission Control Function module will be preserved the relevant information of SPDF module, reserve and the execution phase, and the Access-Resource and Admission Control Function module is located suitable SPDF module according to the information of preserving.
Compared with prior art, use the present invention, realized the function of Access-Resource and Admission Control Function module discovery SPDF module, the Access-Resource and Admission Control Function module can mail to suitable SPDF module with request.
Description of drawings
Fig. 1 is the RACS functional frame composition of TISPAN in the prior art;
Fig. 2 is the resource request flow chart of prior art pull-mode;
Fig. 3 is a plurality of SPDF and the sketch map that Access-Resource and Admission Control Function is mutual;
Fig. 4 is the structural representation that the present invention is directed to the discovery device of the Access-Resource and Admission Control Function increase SPDF module among the TISPAN RACS;
Fig. 5 is that Access-Resource and Admission Control Function increases the resource and admission control flow chart behind the discovery device of SPDF module among the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
The present invention is directed to TISPAN RACS function structure, as shown in Figure 4, in the Access-Resource and Admission Control Function module, increase the discovery device of SPDF module, and combined this discovery device to propose the new resource and admission control flow method under the pull-mode of Resource and Admission Control Sub-system.
Wherein, the SPDF discovery strategy of Access-Resource and Admission Control Function module can be a static configuration.For example: the Access-Resource and Admission Control Function module in a certain physical region can only be mutual with the SPDF module of regulation, when the Access-Resource and Admission Control Function module is received the transmission equipment sent request, and the SPDF module of just this message goes being stipulated.
Wherein, The SPDF discovery strategy of Access-Resource and Admission Control Function module can be dynamic, for example, if having " pre-authorization " under the resource and admission control pull-mode; Then can notify the Access-Resource and Admission Control Function module in pre-authorization stage SPDF module, the Access-Resource and Admission Control Function module will be preserved the relevant information of SPDF module.Like this, in " reservation " and " execution " stage, the Access-Resource and Admission Control Function module just can decide suitable SPDF module according to the information of preserving.
If the Access-Resource and Admission Control Function module can not selected suitable SPDF module according to the SPDF discovery strategy, then the Access-Resource and Admission Control Function module will be sent message to all mutual with it SPDF modules, to find suitable SPDF module.
The SPDF module only receives that the resource policy request message that matches just handles accordingly, and replys the Access-Resource and Admission Control Function module; Be left intact when receiving the resource policy request message that has no truck with, directly abandon, do not respond and answer.
A kind of discovery device of SPDF module; The pull-mode that is used for Resource and Admission Control Sub-system; If Access-Resource and Admission Control Function module and a plurality of SPDF module are mutual; Then this discovery device finds suitable SPDF module according to corresponding discovery strategy (static configuration discovery strategy, dynamically generate discovery strategy etc.), and sends the resource decision request message for this SPDF module.
A kind of Resource and Admission Control Sub-system is applied in the pull-mode of Resource and Admission Control Sub-system, comprises Access-Resource and Admission Control Function module and SPDF module,
Wherein said Access-Resource and Admission Control Function module comprises the discovery device based on the policy functional module of business; The discovery device of said policy functional module based on business is used under the mutual situation of Access-Resource and Admission Control Function module and a plurality of SPDF module; Find suitable SPDF module according to corresponding discovery strategy (static configuration discovery strategy, dynamically generate discovery strategy etc.), and send the resource decision request message for this SPDF module.
After following mask body is introduced in the Resource and Admission Control Sub-system discovery device that increases said strategy decisive function based on business, improved resource and admission control flow under the pull-mode.
Fig. 5 Access-Resource and Admission Control Function module of the present invention increases the resource and admission control flow chart after said SPDF finds device, may further comprise the steps:
After BTF receives the resource request of CPE initiation, send a resource request message and give the RCEF module.
The SPDF module, therefore can be divided into following several kinds of situation and handle because the Access-Resource and Admission Control Function module can be mutual with a plurality of SPDF modules according to the decision-making of being generated strategy by the policing rule of Virtual network operator definition:
Step 504-1: if the Access-Resource and Admission Control Function module is only mutual with a SPDF module, then the Access-Resource and Admission Control Function module is directly sent the resource decision request message and is given this SPDF module;
Step 504-2: if Access-Resource and Admission Control Function module and a plurality of SPDF module are mutual; Then the Access-Resource and Admission Control Function module will be according to the discovery device of SPDF; Find suitable SPDF module according to corresponding SPDF discovery strategy (static configuration discovery strategy, dynamically generate discovery strategy etc.), and send the resource decision request message for this SPDF module;
The static configuration discovery strategy is meant just does corresponding configuration before mutual between Access-Resource and Admission Control Function module and the SPDF module; For example: the Access-Resource and Admission Control Function module in a certain physical region can only be mutual with the SPDF module of regulation; When the Access-Resource and Admission Control Function module is received the resource decision request message that transmission equipment sends, just this resource decision request message is mail to the SPDF module of regulation; Perhaps the SPDF module disposes according to the IP address, the request in the promptly different SPDF resume module different IP addresses scopes, and the Access-Resource and Admission Control Function module just can mail to corresponding SPDF module according to the IP address information of carrying in the resource decision request message like this.
Dynamically generate discovery strategy and be meant " pre-authorization " stage under resource and admission control pull-mode; After the SPDF module notice Access-Resource and Admission Control Function module; The Access-Resource and Admission Control Function module will be preserved the relevant information of SPDF module; Like this, in " reservation " and " execution " stage, the Access-Resource and Admission Control Function module just can be located suitable SPDF module according to the information of preserving.
Step 504-3: if the Access-Resource and Admission Control Function module can't be selected suitable SPDF module, then the Access-Resource and Admission Control Function module will send to all mutual with it SPDF modules to said resource decision request message.
After step 505:SPDF module is received the resource decision request message, judge whether this resource decision request message matches, then correspondingly handle, and reply and reply if mate; Then do not carry out any processing if having nothing to do, directly abandon, do not respond and answer.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with this technological people in the technical scope that the present invention disclosed; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (6)
1. a Resource and Admission Control Sub-system is applied in the pull-mode of Resource and Admission Control Sub-system, and comprise accommodating access resource controlled function Access-Resource and Admission Control Function module and, it is characterized in that based on the strategy decisive function SPDF module of business,
Said Access-Resource and Admission Control Function module comprises the discovery device based on the policy functional module of business; Should be used for based on discovery device of the policy functional module of business under the mutual situation of Access-Resource and Admission Control Function module and a plurality of SPDF module, finding suitable SPDF module according to corresponding discovery strategy;
The discovery device of said policy functional module based on business also is used for after finding suitable SPDF module, sends the resource decision request message for this SPDF module; If can't select suitable SPDF module, then the Access-Resource and Admission Control Function module sends to all mutual with it SPDF modules with said resource decision request message.
2. Resource and Admission Control Sub-system as claimed in claim 1 is characterized in that,
The discovery device of said policy functional module based on business comprises the static configuration discovery strategy according to corresponding discovery strategy,
The static configuration discovery strategy is meant just does corresponding configuration before mutual between Access-Resource and Admission Control Function module and the SPDF module; Be that the interior Access-Resource and Admission Control Function module of a certain physical region is only mutual with the SPDF module of regulation; When the Access-Resource and Admission Control Function module is received the resource decision request message that transmission equipment sends, just this resource decision request message is mail to the SPDF module of regulation; Perhaps the SPDF module disposes according to the IP address, the request in the promptly different SPDF resume module different IP addresses scopes, and the Access-Resource and Admission Control Function module just can mail to corresponding SPDF module according to the IP address information of carrying in the resource decision request message.
3. Resource and Admission Control Sub-system as claimed in claim 1 is characterized in that,
The discovery device of said policy functional module based on business also comprises dynamic generation discovery strategy according to corresponding discovery strategy,
Dynamically generate discovery strategy and be meant the pre-authorization stage under resource and admission control pull-mode; After the SPDF module notice Access-Resource and Admission Control Function module; The Access-Resource and Admission Control Function module will be preserved the relevant information of SPDF module, reserve and the execution phase, and the Access-Resource and Admission Control Function module is located suitable SPDF module according to the information of preserving.
4. a method of sending the resource decision request message is applied in the pull-mode of Resource and Admission Control Sub-system, and said Resource and Admission Control Sub-system comprises Access-Resource and Admission Control Function module and SPDF module, it is characterized in that,
If Access-Resource and Admission Control Function module and a plurality of SPDF module are mutual, then said Access-Resource and Admission Control Function module finds suitable SPDF module according to corresponding discovery strategy, and sends the resource decision request message for this SPDF module;
If Access-Resource and Admission Control Function module and a plurality of SPDF module are mutual, and the Access-Resource and Admission Control Function module can't select suitable SPDF module, and then the Access-Resource and Admission Control Function module sends to all mutual with it SPDF modules with said resource decision request message.
5. method as claimed in claim 4 is characterized in that,
Said discovery strategy comprises the static configuration discovery strategy,
The static configuration discovery strategy is meant just does corresponding configuration before mutual between Access-Resource and Admission Control Function module and the SPDF module; Be that the interior Access-Resource and Admission Control Function module of a certain physical region is only mutual with the SPDF module of regulation; When the Access-Resource and Admission Control Function module is received the resource decision request message that transmission equipment sends, just this resource decision request message is mail to the SPDF module of regulation; Perhaps the SPDF module disposes according to the IP address, the request in the promptly different SPDF resume module different IP addresses scopes, and the Access-Resource and Admission Control Function module just can mail to corresponding SPDF module according to the IP address information of carrying in the resource decision request message.
6. method as claimed in claim 4 is characterized in that,
Said discovery strategy also comprises dynamic generation discovery strategy,
Dynamically generate discovery strategy and be meant the pre-authorization stage under resource and admission control pull-mode; After the SPDF module notice Access-Resource and Admission Control Function module; The Access-Resource and Admission Control Function module will be preserved the relevant information of SPDF module, reserve and the execution phase, and the Access-Resource and Admission Control Function module is located suitable SPDF module according to the information of preserving.
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| CN2008100077116A CN101282351B (en) | 2008-02-29 | 2008-02-29 | Resource admission control subsystem as well as method for transmitting resource decision required message |
| PCT/CN2008/070855 WO2009105942A1 (en) | 2008-02-29 | 2008-04-30 | Resource and admission control subsystem and method for sending resource policy decision request message |
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| CN2008100077116A CN101282351B (en) | 2008-02-29 | 2008-02-29 | Resource admission control subsystem as well as method for transmitting resource decision required message |
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| CN101075914A (en) * | 2007-04-29 | 2007-11-21 | 中兴通讯股份有限公司 | RACF system and equipment with dynamic discovery function in NGN |
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| US7620708B2 (en) * | 2005-05-31 | 2009-11-17 | Cisco Technology, Inc. | Automatic discovery of controlling policy enforcement point in a policy push model |
| CN101222432B (en) * | 2008-01-23 | 2011-08-24 | 中兴通讯股份有限公司 | Resource accepting and control method |
| CN101237448B (en) * | 2008-01-30 | 2012-07-04 | 中兴通讯股份有限公司 | Selection method for policy decision function entity in resource receiving control system |
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| CN101075914A (en) * | 2007-04-29 | 2007-11-21 | 中兴通讯股份有限公司 | RACF system and equipment with dynamic discovery function in NGN |
Non-Patent Citations (1)
| Title |
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| International Telecommunication Union.Resource and admission control functions in Next Generation Networks.《ITU-T REC.Y.2111》.2007,第12页-第20页. * |
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| WO2009105942A1 (en) | 2009-09-03 |
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