CN101309238B - Resource admission control system and method for network of multiple protocol label switch structure - Google Patents
Resource admission control system and method for network of multiple protocol label switch structure Download PDFInfo
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- CN101309238B CN101309238B CN2008101291687A CN200810129168A CN101309238B CN 101309238 B CN101309238 B CN 101309238B CN 2008101291687 A CN2008101291687 A CN 2008101291687A CN 200810129168 A CN200810129168 A CN 200810129168A CN 101309238 B CN101309238 B CN 101309238B
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Abstract
The invention discloses an MPLS network resource admission control system and a method which relate to the communication field. The system in the invention includes a network border gateway and an LER connected with the border gateway; the border gateway is connected a top layer PD-FE; the border gateway includes a PE-FE which is connected with the top layer PD-FE; wherein, the PD-FE is used for receiving the RIR message of the top layer PD-FE and detecting if the border has available network resource and making the resource admission decision according to the resource available detection result when the PD-FE is informed that the channel mapping is finished; the LER includes a second TRC-FE and a TRE-FE which are connected with each other; the TRC-FE is connected with the PD-FE of the border gateway; wherein, the TRC-FE is used for controlling the TRE-FE to map the media stream to the DS-TE channel and informing the first TRC-FE that the channel mapping is finished when the available network resource is judged to fulfill the service requirement; the TRE-FE is used for mapping the media stream to the DS-TE channel. The technical proposal of the MPLS network resource admission control system and the method solve the Qos problem in the MPLS network.
Description
Technical field
The present invention relates to the communications field, relate more specifically to a kind of MPLS (Multiprotocol LabelSwitching Architecture, multiple protocol label switch structure) network resource admission control system and method.
Background technology
NGN (Network Generation Network, next generation network) is a hot research problem in current communication standard field, and it adopts grouping technology such as IP as communication of Bearer Network converged fixed and mobile communication.NGN can provide abundanter multimedia service, as has an emerging service (as VoIP, video conference, multimedia remote teaching, video request program etc.) of real-time requirement, these business need communication networks can provide efficiently end to end, and QoS (Quality of Service, service quality) supports; The user is also more and more higher to the requirement of network service quality simultaneously.Therefore, how providing end to end, QoS is one of key problem of NGN.
Present ITU (International Telecommunication Union, the resource control of the MPLS bearer network that adopts usually for the NGN system International Telecommunications Union) has centralized and distributed two kinds of schemes, the draft standard of distributed schemes has just begun to formulate, its framework as shown in Figure 1, dispose gateway device (as: SBC (Session Border Controller at the MPLS network boundary, the session border controlled function) or BG-FE (Border Gateway Functional Entity, Border Gateway Function)), gateway device receives RACF (Resource and Admission Control Function by the Rt interface, resource accommodating control function) resource request, and with between the PD-FE (Policy Decision FunctionEntity, policy deciding functional entity) of RACF by Rw interactive interfacing policy-related (noun) message.Wherein, PD-FE passes through the Rs interface from SCF (Service Control Function, business control function body) obtains medium streaming session information, by the Ru interface from NACF (Network Attachment ControlFunction, network attached controlled function entity) obtain user's transfer resource CAMEL-Subscription-Information, but PD-FE can't realize resource and admission control to above-mentioned MPLS network at present.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of MPLS network resource admission control system and method, the Qos problem in the solution MPLS network.
In order to address the above problem, the invention discloses a kind of MPLS network resource admission control system, comprise MPLS network boundary gateway, and the tag edge router LER that links to each other with described borde gateway, described borde gateway links to each other with top-level policy decision making function entity PD-FE
Described borde gateway comprises PD-FE, and described PD-FE links to each other with top layer PD-FE, wherein:
Described PD-FE is used for after receiving the initializing resource request RIR message of described top layer PD-FE, checks whether borde gateway has available network resources, and after knowing that the tunnel mapping is finished, makes the resource and admission decision-making according to the Resource Availability check result;
Described LER comprises that interconnected transfer resource controlled function entity TRC-FE and transfer resource carry out functional entity TRE-FE, and described TRC-FE also links to each other with PD-FE on the described borde gateway, wherein:
Described TRC-FE is used for after judging that described available network resources satisfies business demand, and the TRE-FE on the control LER is mapped to traffic engineering tunnel DS-TE with Media Stream, and notifies the mapping of described PD-FE tunnel to finish;
Described TRE-FE is used for described Media Stream is mapped to DS-TE.
Further, in the described system, described borde gateway further comprises the policy execution functional entity PE-FE that is connected with described PD-FE, and described PE-FE is used to receive and carry out the resource and admission decision-making of the PD-FE on the described borde gateway.
Further, in the described system, the TRC-FE on the described LER also is used for the resource of other DS-TE of different QoS level is checked, controls described TRE-FE Media Stream is mapped on corresponding other DS-TE of QoS level;
Described TRE-FE also is used for Media Stream is mapped to corresponding other DS-TE of QoS level.
Wherein, the TRC-FE on the described LER, be used to also judge that described available network resource does not satisfy business demand after, adjust the allocated bandwidth between the DS-TE.
Further, in the described system, described borde gateway is session border controlled function entity SBC or Border Gateway Function entity B G-FE.
The invention also discloses a kind of multiple protocol label switch structure MPLS network resource admission control method, in the resource request handling process, top layer PD-FE receives RIR message, after the QoS resource of Media Stream request authorized, described top layer PD-FE finds out the related borde gateway of Media Stream, and sends RIR message to described borde gateway;
After described borde gateway is received RIR message, if check available network resources arranged on it, then require LER to judge whether described available network resources satisfies business demand, if satisfy, then described LER returns initializing resource to described borde gateway and replys RIP message after described Media Stream is mapped to DS-TE;
After described borde gateway is received RIP message, make the resource and admission decision-making.
Further, described method comprises:
(a) described top layer PD-FE receives RIR message, and after Media Stream requested service quality Q oS resource was authorized, described top layer PD-FE found out the related borde gateway of Media Stream, and the PD-FE on described borde gateway sends RIR message;
(b) after the PD-FE on the described borde gateway receives RIR message, check whether borde gateway has available network resources, if having, then the TRC-FE on LER sends and requires to check whether resource satisfies the RIR message of business demand;
(c) after described TRC-FE receives the RIR message of the PD-FE transmission on the described borde gateway, judge whether described available network resources satisfies business demand, if satisfy, the TRE-FE that then controls on the LER is mapped to DS-TE with described Media Stream, after the success, the PD-FE on borde gateway returns initializing resource and replys RIP message;
(d) after the PD-FE on the described borde gateway receives described RIP message, make the resource and admission decision-making according to the Resource Availability check result.
Further, in the described method, in the described step (b), the TRC-FE of described PD-FE head-end LER sends RIR message.
Wherein, in the described step (c), after described TRC-FE receives the RIR message of the PD-FE transmission on the described borde gateway, also the resource of other DS-TE of different QoS level is checked, if judge that described TRC-FE controlled described TRE-FE Media Stream is mapped on corresponding other DS-TE of QoS level when described available network resources satisfied business demand.
Described TRC-FE judges that when available network resources did not satisfy business demand, adjustment was to the allocated bandwidth between the DS-TE.
Described borde gateway is session border controlled function entity SBC or Border Gateway Function entity B G-FE.
The technical scheme that technical solution of the present invention discloses has proposed a kind of concrete MPLS network resource admission control system, has solved the Qos problem in the MPLS network.
Description of drawings
Fig. 1 is the structural representation of RACF control MPLS network distribution type scheme in the prior art;
Fig. 2 is the structural representation of MPLS network resource admission control system among the present invention;
Fig. 3 is the flow chart of MPLS network resource admission control among the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments technical solution of the present invention is described in further detail.
A kind of MPLS network resource admission control system, as shown in Figure 2, this system comprises the borde gateway (SBC or BG-FE) that is deployed in the MPLS network, and the MPLS network edge router LER that links to each other with borde gateway, wherein, all borde gateways link to each other with top layer PD-FE, below each several part in this system are elaborated.
Borde gateway further comprises PD-FE and PE-FE (Policy Execute Function Entity, policy execution functional entity), and PD-FE links to each other with top layer PD-FE, wherein:
PD-FE is used for after receiving the RIR message of top layer PD-FE, check whether borde gateway has available network resources, and after knowing that the tunnel mapping is finished, make final resource and admission decision-making according to the Resource Availability check result, and generation Qos strategy, instruct PE-FE to carry out strategy execution, and return the final decision result to top layer PD-FE;
PE-FE is used for carrying out policy control (as gate, bandwidth, traffic classification and mark, traffic shaping, collection and report resource use information etc.) under the PD-FE on the borde gateway instructs, be used in particular for receiving the Qos strategy of the PD-FE on the described borde gateway, carry out the Qos policy installation;
LER further comprises interconnected TRC-FE and TRE-FE, and TRC-FE also links to each other with PD-FE on the borde gateway, wherein:
TRC-FE, be used for after judging that described available network resources satisfies business demand, TRE-FE on the control LER is mapped to the DS-TE tunnel with Media Stream, and the PD-FE tunnel on notice borde gateway mapping finishes, and it also is used for, judge that available network resource does not satisfy business demand after, adjust the allocated bandwidth between the DS-TE, in addition, also be used for other traffic engineering tunnel resource of different QoS level is checked, and control described TRE-FE Media Stream is mapped on other DS-TE tunnel of corresponding QoS level;
TRE-FE is used for described Media Stream is mapped to the DS-TE tunnel, and further, it can be mapped to Media Stream on other DS-TE tunnel of corresponding QoS level.
Said system realizes the handling process of MPLS network resource admission control, as shown in Figure 3, may further comprise the steps:
(301) common, business set up incident or SCF internal actions (for example: SCF receives or the business of initiating is set up signaling) can trigger the initializing resource request (Resource Initiation Request, RIR);
(302) SCF determines the qos parameter (as: bandwidth, the grade of service etc.) that this service media stream needs, and by RIR message request resource, this message is carried Media Stream and described and relevant QoS information to top layer PD-FE;
(303) top layer PD-FE receives RIR message, check that Media Stream is described and the QoS resource of request whether consistent with user's transport layer CAMEL-Subscription-Information of own network strategy rule and NACF maintenance, if, then the QoS resource of Media Stream request is authorized, enter next step, otherwise process ends;
(304) top layer PD-FE finds out the related relevant borde gateway (SBC or BG-FE) of Media Stream, and the PD-FE on these borde gateways sends RIR message to check whether available network resources satisfies business demand;
In this step, because LSP (label switched path) is a unidirectional tunnel, so top layer PD-FE need issue RIR message respectively to the BG-FE at the network path two ends that Media Stream relates to usually.
(305) PD-FE on the borde gateway checks the upward availability of resource of borde gateway (SBC or BG-FE), and the TRC-FE on Head-end LER sends RIR message to check whether available resources satisfy business demand in the MPLS network;
In this step, the LER that Media Stream flows into is Head-end LER, and correspondingly, the LER that Media Stream flows out is Tail-end LER.PD-FE on the borde gateway is by Diameter (diameter) protocol message or adopt RSVP PATH (the crossing bearer path) message that defines among the RFC4804 to realize the inspection of MPLS network resource availability.
(306) TRC-FE on the Head-end LER is safeguarding the control of MPLS resources in network, the resource allocation conditions that further comprises the traffic engineering tunnel of different QoS priority, its resource according to available resource situation and service request makes a policy, if available resources satisfy business demand, the TRC-FE on the LER generates strategy to instruct TRE-FE that the Media Stream of business is mapped on other DS-TE tunnel of corresponding QoS level so;
In this step, the TRC-FE on the LER can generate strategy to instruct TRE-FE that the Media Stream of business is mapped on other DS-TE tunnel of corresponding QoS level according to prior art.
(307) if available resource can not satisfy business demand, TRC-FE on the Head-end LER can carry out alternately with Tail-end LER by carrier signaling (RSVP signaling), and the allocated bandwidth between the DS-TE (traffic engineering) is adjusted to satisfy other the professional resource requirement of high QoS level;
In this step, can certainly in other embodiments, also can omit this step and directly enter step 308 according to the adjustment of existing techniques in realizing bandwidth.
(308) TRC-FE on the LER send initializing resource reply (Resource InitiationResponse, RIP) message is to the PD-FE on the borde gateway;
Whether available resources satisfy business demand if the PD-FE on the borde gateway adopts RSVP PATH message inspection, and then in this step, the PD-FE of the TRC-FE on the LER on borde gateway sends RSVPRESV message;
(309) PD-FE on the borde gateway makes final resource and admission decision-making according to the Resource Availability check result;
In other embodiments, the PD-FE on the borde gateway also according to the resource and admission decision-making of making, generates qos policy, instructs PE-FE to carry out strategy execution.
(310) PD-FE on the borde gateway replys RIP message to top layer PD-FE, notifies its final decision result;
(311) top layer PD-FE replys RIP message to SCF.
From the foregoing description as can be seen, the technical scheme that technical solution of the present invention discloses has proposed a kind of concrete MPLS network resource admission control system, and specializing MPLS network resource admission control procedure.
The present invention also can have in other multiple examples; under the situation that does not deviate from spirit of the present invention and essence thereof; those skilled in the art can make corresponding change and distortion according to the present invention, but these corresponding changes and distortion all should belong within the protection range of the appended claim of the present invention.
Claims (11)
1. multiple protocol label switch structure MPLS network resource admission control system, comprise MPLS network boundary gateway, and the tag edge router LER that links to each other with described borde gateway, described borde gateway links to each other with top-level policy decision making function entity PD-FE, it is characterized in that
Described borde gateway comprises PD-FE, and the PD-FE on the borde gateway links to each other with top layer PD-FE, wherein:
Described PD-FE is used for after receiving the initializing resource request RIR message of described top layer PD-FE, checks whether borde gateway has available network resources, and after knowing that the tunnel mapping is finished, makes the resource and admission decision-making according to the Resource Availability check result;
Described LER comprises that interconnected transfer resource controlled function entity TRC-FE and transfer resource carry out functional entity TRE-FE, and described TRC-FE also links to each other with PD-FE on the described borde gateway, wherein:
Described TRC-FE is used for after judging that described available network resources satisfies business demand, and the TRE-FE on the control LER is mapped to traffic engineering tunnel DS-TE with Media Stream, and notifies the PD-FE tunnel mapping on the described borde gateway to finish;
Described TRE-FE is used for described Media Stream is mapped to DS-TE.
2. the system as claimed in claim 1 is characterized in that,
Described borde gateway further comprises the policy execution functional entity PE-FE that is connected with PD-FE on the described borde gateway, and described PE-FE is used to receive and carry out the resource and admission decision-making of the PD-FE on the described borde gateway.
3. the system as claimed in claim 1 is characterized in that,
TRC-FE on the described LER also is used for the resource of other DS-TE of different QoS level is checked, controls described TRE-FE Media Stream is mapped on corresponding other DS-TE of QoS level;
Described TRE-FE also is used for Media Stream is mapped to corresponding other DS-TE of QoS level.
4. as claim 1 or 3 described systems, it is characterized in that,
TRC-FE on the described LER, be used to also judge that described available network resource does not satisfy business demand after, adjust the allocated bandwidth between the DS-TE.
5. the system as claimed in claim 1 is characterized in that,
Described borde gateway is session border controlled function entity SBC or Border Gateway Function entity B G-FE.
6. a multiple protocol label switch structure MPLS network resource admission control method is characterized in that,
In the resource request handling process, top-level policy decision making function entity PD-FE receives initializing resource request RIR message, after Media Stream requested service quality Q oS resource authorized, described top layer PD-FE finds out the related borde gateway of Media Stream, and sends RIR message to described borde gateway;
After described borde gateway is received RIR message, if check available network resources arranged on it, then require tag edge router LER to judge whether described available network resources satisfies business demand, if satisfy, then described LER returns initializing resource to described borde gateway and replys RIP message after described Media Stream is mapped to traffic engineering tunnel DS-TE;
After described borde gateway is received RIP message, make the resource and admission decision-making.
7. method as claimed in claim 6 is characterized in that, described method comprises:
(a) described top layer PD-FE receives RIR message, and after Media Stream requested service quality Q oS resource was authorized, described top layer PD-FE found out the related borde gateway of Media Stream, and the PD-FE on described borde gateway sends RIR message;
(b) after the PD-FE on the described borde gateway receives RIR message, check whether borde gateway has available network resources, if having, then the transfer resource controlled function entity TRC-FE on LER sends and requires to check whether resource satisfies the RIR message of business demand;
(c) after described TRC-FE receives the RIR message of the PD-FE transmission on the described borde gateway, judge whether described available network resources satisfies business demand, if satisfy, the transfer resource execution functional entity TRE-FE that then controls on the LER is mapped to DS-TE with described Media Stream, after the success, the PD-FE on borde gateway returns initializing resource and replys RIP message;
(d) after the PD-FE on the described borde gateway receives described RIP message, make the resource and admission decision-making according to the Resource Availability check result.
8. method as claimed in claim 7 is characterized in that,
In the described step (b), the TRC-FE of described PD-FE head-end LER sends RIR message, and wherein, described head end LER is meant the LER that Media Stream flows into.
9. as claim 7 or 8 described methods, it is characterized in that,
In the described step (c), after described TRC-FE receives the RIR message of the PD-FE transmission on the described borde gateway, also the resource of other DS-TE of different QoS level is checked, if judge that described TRC-FE controlled described TRE-FE Media Stream is mapped on corresponding other DS-TE of QoS level when described available network resources satisfied business demand.
10. as claim 7 or 8 described methods, it is characterized in that,
Described TRC-FE judges that when available network resources did not satisfy business demand, adjustment was to the allocated bandwidth between the DS-TE.
11. as claim 6,7 or 8 described methods, it is characterized in that,
Described borde gateway is session border controlled function entity SBC or Border Gateway Function entity B G-FE.
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| CN101599979B (en) * | 2009-07-10 | 2012-06-27 | 迈普通信技术股份有限公司 | Method for realizing IP telecommunication network based on tunnel |
| CN102035792A (en) * | 2009-09-24 | 2011-04-27 | 中兴通讯股份有限公司 | Multicast resource management method and device |
| CN102215475B (en) * | 2010-04-02 | 2015-04-01 | 中兴通讯股份有限公司 | Method and system for searching resources in roaming |
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