CN101309229B - Resource admission control method for network of multiple protocol label switch structure - Google Patents
Resource admission control method for network of multiple protocol label switch structure Download PDFInfo
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- CN101309229B CN101309229B CN2008101429146A CN200810142914A CN101309229B CN 101309229 B CN101309229 B CN 101309229B CN 2008101429146 A CN2008101429146 A CN 2008101429146A CN 200810142914 A CN200810142914 A CN 200810142914A CN 101309229 B CN101309229 B CN 101309229B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/72—Admission control; Resource allocation using reservation actions during connection setup
- H04L47/724—Admission control; Resource allocation using reservation actions during connection setup at intermediate nodes, e.g. resource reservation protocol [RSVP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
Abstract
The invention discloses a network resource admission control method with the multi-protocol label switching frame MPLS, including that a strategy decision functional entity PD-FE receives the resource request submitted by the service control layer for the service flow; and then sends the resource initialization request to the gateway devices which the service flow transits; the gateway devices process the resource availability detection towards the paths that the service flow transits through the resource reservation protocol; if the paths have enough resources, the resource request is admitted; otherwise the resource request is rejected. The network resource admission control method with the multi-protocol label switching frame MPLS combines the resource admission control function RACF to explicit the resource admission control process and realize the effective control of the resources in the MPLS network.
Description
Technical field
The present invention relates to the communications field, relate more specifically to the method for a kind of MPLS (Multiprotocol LabelSwitching Architecture, multiple protocol label switch structure) network resource admission control.
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 end to end, and QoS (Quality ofService, service quality) supports; 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.
ITU-T (International Telecommunication Union, International Telecommunications Union) has proposed the QoS problem that RACF (Resource and Admission Control Function, resource accommodating control function) solves the NGN bearer network.
The major function of RACF is based on the operation policing rule, carries out resource and admission control according to signatory QoS information of user and network internal available resources.It has shielded the difference of bearing bed to application layer, and the QoS best property of attribute mapping of application layer to bearing bed, is made the bearing bed transfer entity instruct at it QoS can be provided for the Media Stream of session down guarantee.
In the up-to-date RACF draft of ITU, the functional framework of RACF is as shown in Figure 1, wherein:
PD-FE (Policy Decision Function Entity; Policy deciding functional entity) policing rule Network Based, medium streaming session information, user's transfer resource CAMEL-Subscription-Information is made preliminary QoS resource decision; Wherein medium streaming session information is passed through the Rs interface from SCF (Service Control Function; Business control function body) obtains; User's transfer resource CAMEL-Subscription-Information obtains from NACF (Network Attachment Control Function, network attached controlled function entity) through the Ru interface; Then with TRC-FE (Transport Resource Control Function Entity; Transfer resource controlled function entity) alternately to confirm whether to have enough QoS resources; Make a final decision at last; Generate QoS control strategy (tactful content mainly comprises: Media Stream description, qos parameter, gate etc.), and carry out to PE-FE (Policy Execute Function Entity, policy execution functional entity) policy distribution;
TRC-FE mainly is responsible for collecting and safeguarding the topological sum resource state information of transmission network; Resource in its monitor network is also collected relevant information; Use based on the information Control resources such as availability of topology, connectivity, network and node resource; Resource request is carried out admittance control, when the PD-FE request resource, reply according to concrete resource situation;
PE-FE carries out policy control (gate, bandwidth, traffic classification and mark, traffic shaping, collection and report resource use information etc.) under guidance at PD-FE.
TRE-FE (Transport Resource Execute Function Entity; Transfer resource is carried out functional entity) the present explanation of agreement is under TRC-FE instructs, to carry out two layer the strategy execution relevant with transmission technology, but concrete function and scope all do not have to confirm.
Resource control for the MPLS network among the ITU has centralized and distributed two kinds of schemes; The draft standard of distributed schemes has just begun to formulate; Present Organization Chart is as shown in Figure 2, and the MPLS network is by LER (Label Edge Router, tag edge router) and LSR (Label Switched Router; LSR) forms; Dispose gateway device (as: SBC (Session BorderController, Session Border Controller) or BG-FE (Border Gateway Functional Entity, Border Gateway Function entity)) at network boundary; Borde gateway equipment and LER have the TRC-FE function.
But present standard has only more abstract configuration diagram, does not combine the clear and definite concrete resource and admission control flow of RACF functional entity, can not clearly embody the detailed process of RACF to the control of MPLS Internet resources.
Summary of the invention
The technical problem that the present invention will solve is exactly the method that proposes a kind of MPLS network resource admission control, in conjunction with the clear and definite resource and admission control procedure of RACF functional entity, in the MPLS network, resource is admitted control effectively.
In order to solve the problems of the technologies described above, the present invention provides a kind of method of multiple protocol label switch structure MPLS network resource admission control, comprising:
After policy deciding functional entity PD-FE received the resource request that service control layer is the Business Stream submission, the gateway device that need pass through to said Business Stream sent the initializing resource request;
The Resource Availability inspection is carried out in the path that gateway device need pass through Business Stream through RSVP RSVP message;
If there are enough resources in said path, then said resource request is admitted, otherwise is rejected.
Further, said method comprises the steps:
(A) PD-FE receives the resource request that service control layer is the Business Stream submission, and the gateway device that need pass through to Business Stream sends the initializing resource request;
(B) said gateway device sends RSVP message and gives the opposite end gateway device according to the PD-FE requested resource, and said message is used to carry out the Resource Availability inspection;
(C) the said message availability of the network element inspection resource of process on the way, if there are enough resources in the path that Business Stream need pass through, then said resource request is admitted, otherwise is rejected.
Further, in the said step (A), PD-FE sends initializing resource request RIR message to two gateway devices of network edge, initiates resource reservation and handles.
Further, in the said step (B), said gateway device sends the RIR message of RSVP and carries out the Resource Availability inspection according to the PD-FE requested resource to the opposite end gateway device, and said RIR message at first arrives tag edge router LER.
Further, after said step (B) was carried out, LER handled and receives said RIR message, according to message decision needs requested resource quantity in corresponding TE tunnel of traffic engineering; LER transmits RIR message to the gateway device of opposite end respectively, carries out resource reservation request.
Further, in the said step (C), the said message network element of process on the way can be carried out the Resource Availability inspection:
(C1) if traffic engineering tunnel has this resource request of enough resource and admissions, the gateway device at two ends can receive that the initializing resource of the RSVP RESV form that returns replys RIP message so, and said resource request will be admitted;
(C2) fix as if the TE bandwidth, and do not have enough resources, the gateway device at two ends can be received the RIP message of the RSVP error code RSVP Error Code form that returns so;
(C3) if be perception Differentiated Services traffic engineering DS-TE between the LER; If corresponding TE does not have enough resources; So the allocated bandwidth between TE is adjusted; If adjustment back resource can satisfy request, so said gateway device can be received the RIP message of RSVP RESV form, otherwise receives the RIP message of RSVP ErrorCode form.
Further, said method comprises the steps:
(a) PD-FE receives the resource request that service control layer is the Business Stream submission, and the gateway device that need pass through to Business Stream sends the initializing resource request;
(b) gateway device judges according to the MPLS network resource status of safeguarding whether current available resource satisfies resource request;
(c) if current available resource can satisfy resource request, then gateway device is admitted said resource request, otherwise refusal.
Further, in the said step (a), PD-FE sends RIR message to two gateway devices of network edge, initiates resource reservation and handles.
Further, in the said step (c), if current available resource can satisfy resource request, the gateway device at two ends is just admitted and should be asked so, and upgrades resource situation; Follow-up gateway device is played the corresponding priority level label to corresponding business stream, and LER is mapped to corresponding traffic engineering tunnel according to precedence information with Business Stream.
Further, in the said step (c),
If current available resource is not enough, the gateway device at two ends carries out the RSVP request to the RSVPPATH message that the other side's transmission is converged respectively so;
If the resource reservation success, gateway device can be received RSVP RESV message respectively so, wants the resource situation information of updating maintenance simultaneously;
If RSVP is unsuccessful, so:
(c1) fix as if MPLS TE bandwidth, and do not have enough resources, the gateway device at two ends can be received the RIP message of the RSVP Error Code form that returns so;
(c2) if be DS-TE between the LER; If corresponding TE does not have enough resources; Can adjust the allocated bandwidth between TE so; If adjustment back resource can satisfy request, gateway device is received the RIP message of RSVP RESV form so, otherwise receives the RIP message of RSVP Error Code form; If bandwidth is adjusted successfully, admitted request, so the resource situation of the gateway device updating maintenance at two ends.
The present invention proposes a kind of method of MPLS resources in network control; Comprise resource and admission control and treatment and employing RSVP (Resource ReSerVation Protocol based on Business Stream; RSVP) the resource and admission control and treatment of the ethod of remittance; Clear and definite resource and admission control procedure in conjunction with the RACF functional entity has realized in the MPLS network, resources effective being controlled.
Description of drawings
Fig. 1 is the Organization Chart of the Resource and Admission Control Sub-system RACF of ITU-T;
Fig. 2 is the configuration diagram of RACF control MPLS network distribution type scheme in the prior art;
Fig. 3 is the resource and admission control flow chart based on Business Stream of the embodiment of the invention;
Fig. 4 is the resource and admission control flow chart that the employing RSVP of the embodiment of the invention converges.
Embodiment
Among the present invention; Gateway device (comprising SBC, BG-FE etc.) utilizes the RSVP signaling to send the initializing resource request to LER through the resource request of Rt interface reception PD-FE, the availability of inspection resource; Make resource-based admittance decision-making; Gateway device also possesses the irrelevant policy enforcement function of transmission owing to be the network boundary point, therefore and between the PD-FE through Rw interactive interfacing policy-related (noun) message.
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Embodiment one
Based on the MPLS network resource admission control and treatment flow process of Business Stream, as shown in Figure 3, omitted the network element (a plurality of LSR) between LER1 and the LER2 among the figure, said processing procedure comprises the steps:
Step 301, it is the resource request that Business Stream is submitted to that PD-FE receives service control layer, the SBC that need pass through to Business Stream sends RIR (Resource Initiation Request, initializing resource request) message, initiates resource reservation and handles; Because MPLS network LSP (Label Switched Path, label switched path) is unidirectional, therefore need all send RIR message to two SBC of network edge;
Step 302, SBC sends the RIR message of RSVP PATH form and carries out the Resource Availability inspection according to the PD-FE requested resource to opposite end SBC, and said RIR message at first arrives LER;
Step 303, LER handles the RIR message of receiving said RSVP PATH form, in corresponding TE (Traffic Engineering, traffic engineering) tunnel, needs requested resource quantity according to the message decision;
Step 304, LER transmits the RIR message of RSVP PATH form respectively to the SBC of opposite end, carry out resource reservation request;
Step 305; The said RIR message network element of process (comprising LSR) on the way can be carried out the Resource Availability inspection; If a traffic engineering tunnel has this resource request of enough resource and admissions; The SBC at two ends can receive RIP (Resource Initiation Response, the initializing resource is replied) message of the RSVP RESV form that returns so, and this resource request will be admitted; If b TE bandwidth is fixed, and do not have enough resources, the SBC at two ends can receive the RIP message of RSVP Error Code (RSVP error code) form that returns so; If between the c LER be DS-TE (DifServ-awareTraffic Engineering; Perception Differentiated Services traffic engineering), if corresponding TE does not have enough resources, LER can adjust the allocated bandwidth between TE so; As the bandwidth of the TE of low priority is adjusted the TE to high priority; If adjustment back resource can satisfy request, SBC can receive the RIP message of RSVP RESV form so, otherwise receives the RIP message of RSVP Error Code form.
Embodiment two
Adopt the resource and admission control and treatment flow process of the RSVP ethod of remittance; Resource behaviour in service in the SBC maintaining network at this mode lower network edge; As shown in Figure 4, omitted the network element (a plurality of LSR) between LER1 and the LER2 among the figure, said processing procedure comprises the steps:
Step 401, it is the resource request that Business Stream is submitted to that PD-FE receives service control layer, the SBC that need pass through to Business Stream sends RIR message, initiates resource reservation and handles; Because MPLS network LSP path is unidirectional, therefore need all send RIR message to two SBC of network edge;
Step 402, SBC judges according to the MPLS network resource status of safeguarding whether current available resource satisfies resource request;
Step 403, if current available resource can satisfy resource request, the SBC at two ends just admits and should ask so, and upgrades resource situation; Follow-up SBC plays the corresponding priority level label to corresponding business stream, and LER can be mapped to corresponding traffic engineering tunnel with Business Stream according to precedence information, and process ends is no longer carried out subsequent step;
Step 404; If current available resource is not enough; The SBC at two ends sends the RSVP PATH message converge to the other side respectively and carries out RSVP request (discharge for fear of repeating application, the bandwidth that request is here reserved can be the bandwidth that exceeds current single request) so;
Step 405, if the resource reservation success, SBC can receive RSVP RESV message respectively so, wants the resource situation information of updating maintenance simultaneously;
Step 406 if RSVP is unsuccessful, if a MPLS TE bandwidth is fixed so, and does not have enough resources, and the SBC at two ends can receive the RIP message of the RSVP Error Code form that returns so; If be DS-TE between the b LER; If corresponding TE does not have enough resources; Can adjust the allocated bandwidth between TE so, as the bandwidth of the TE of low priority is adjusted the TE to high priority, if adjustment back resource can satisfy request; The SBC at two ends can receive the RIP message of the RSVP RESV form that returns so, otherwise can receive the RIP message of RSVP Error Code form;
Step 407 if bandwidth is adjusted successfully, has been admitted request, so the resource situation of the SBC updating maintenance at two ends.
In above-mentioned two embodiment, be to be that SBC is that example is described with the gateway device.In practical application, gateway device also can be above-mentioned BG-FE, perhaps other gateway device, and resource and admission control and treatment flow process is identical, no longer details here.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. the method for a multiple protocol label switch structure MPLS network resource admission control is characterized in that,
After policy deciding functional entity PD-FE received the resource request that service control layer is the Business Stream submission, the gateway device that need pass through to said Business Stream sent the initializing resource request;
The Resource Availability inspection is carried out in the path that gateway device need pass through Business Stream through RSVP RSVP message;
If there are enough resources in said path, then said resource request is admitted, otherwise is rejected.
2. the method for claim 1 is characterized in that, comprises the steps:
(A) PD-FE receives the resource request that service control layer is the Business Stream submission, and the gateway device that need pass through to Business Stream sends the initializing resource request;
(B) said gateway device sends RSVP message and gives the opposite end gateway device according to the PD-FE requested resource, and said message is used to carry out the Resource Availability inspection;
(C) the said message availability of the network element inspection resource of process on the way, if there are enough resources in the path that Business Stream need pass through, then said resource request is admitted, otherwise is rejected.
3. method as claimed in claim 2 is characterized in that, in the said step (A), PD-FE sends initializing resource request RIR message to two gateway devices of network edge, initiates resource reservation and handles.
4. method as claimed in claim 3; It is characterized in that in the said step (B), said gateway device is according to the PD-FE requested resource; Send the RIR message of RSVP to the opposite end gateway device and carry out the Resource Availability inspection, said RIR message at first arrives tag edge router LER.
5. method as claimed in claim 4 is characterized in that, after said step (B) was carried out, LER handled and receives said RIR message, according to message decision needs requested resource quantity in corresponding TE tunnel of traffic engineering; LER transmits RIR message to the gateway device of opposite end respectively, carries out resource reservation request.
6. method as claimed in claim 2 is characterized in that, in the said step (C), the said message network element of process on the way can be carried out the Resource Availability inspection:
(C1) if traffic engineering tunnel has this resource request of enough resource and admissions, the gateway device at two ends can receive that the initializing resource of the RSVP RESV form that returns replys RIP message so, and said resource request will be admitted;
(C2) fix as if the TE bandwidth, and do not have enough resources, the gateway device at two ends can be received the RIP message of the RSVP error code RSVP Error Code form that returns so;
(C3) if be perception Differentiated Services traffic engineering DS-TE between the LER; If corresponding TE does not have enough resources; So the allocated bandwidth between TE is adjusted; If adjustment back resource can satisfy request, so said gateway device can be received the RIP message of RSVP RESV form, otherwise receives the RIP message of RSVP ErrorCode form.
7. the method for claim 1 is characterized in that, comprises the steps:
(a) PD-FE receives the resource request that service control layer is the Business Stream submission, and the gateway device that need pass through to Business Stream sends the initializing resource request;
(b) gateway device judges according to the MPLS network resource status of safeguarding whether current available resource satisfies resource request;
(c) if current available resource can satisfy resource request, then gateway device is admitted said resource request, otherwise refusal.
8. method as claimed in claim 7 is characterized in that, in the said step (a), PD-FE sends RIR message to two gateway devices of network edge, initiates resource reservation and handles.
9. method as claimed in claim 8 is characterized in that, in the said step (c), if current available resource can satisfy resource request, the gateway device at two ends is just admitted and should be asked so, and upgrades resource situation; Follow-up gateway device is played the corresponding priority level label to corresponding business stream, and LER is mapped to corresponding traffic engineering tunnel according to precedence information with Business Stream.
10. method as claimed in claim 8 is characterized in that, in the said step (c),
If current available resource is not enough, the gateway device at two ends carries out the RSVP request to the RSVPPATH message that the other side's transmission is converged respectively so;
If the resource reservation success, gateway device can be received RSVP RESV message respectively so, wants the resource situation information of updating maintenance simultaneously;
If RSVP is unsuccessful, so:
(c1) fix as if MPLS TE bandwidth, and do not have enough resources, the gateway device at two ends can be received the RIP message of the RSVP Error Code form that returns so;
(c2) if be DS-TE between the LER; If corresponding TE does not have enough resources; Can adjust the allocated bandwidth between TE so; If adjustment back resource can satisfy request, gateway device is received the RIP message of RSVP RESV form so, otherwise receives the RIP message of RSVP Error Code form; If bandwidth is adjusted successfully, admitted request, so the resource situation of the gateway device updating maintenance at two ends.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008101429146A CN101309229B (en) | 2008-07-16 | 2008-07-16 | Resource admission control method for network of multiple protocol label switch structure |
| PCT/CN2009/072742 WO2010006545A1 (en) | 2008-07-16 | 2009-07-13 | A method of multiprotocol label switching architecture network resource admission control |
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| CN2008101429146A CN101309229B (en) | 2008-07-16 | 2008-07-16 | Resource admission control method for network of multiple protocol label switch structure |
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| CN101309229A CN101309229A (en) | 2008-11-19 |
| CN101309229B true CN101309229B (en) | 2012-06-13 |
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| CN101309229B (en) * | 2008-07-16 | 2012-06-13 | 中兴通讯股份有限公司 | Resource admission control method for network of multiple protocol label switch structure |
| 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 |
| KR101320633B1 (en) * | 2011-05-25 | 2013-10-30 | 엠앤디 (주) | Method of providing information for diagnosis of cancer using quantitative realtime PCR and diagnostic kit comprising thereof |
| CN108512757B (en) * | 2017-02-27 | 2020-12-11 | 中兴通讯股份有限公司 | Method and device for adjusting bandwidth as required |
| CN109391563B (en) * | 2017-08-08 | 2022-04-05 | 华为技术有限公司 | Resource reservation method and related equipment |
| CN113050703B (en) * | 2021-02-05 | 2022-11-18 | 新华三技术有限公司 | Flow control method and device |
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| US20060018255A1 (en) * | 2004-07-26 | 2006-01-26 | Avaya Technology Corp. | Defining a static path through a communications network to provide wiretap law compliance |
| CN101309229B (en) * | 2008-07-16 | 2012-06-13 | 中兴通讯股份有限公司 | Resource admission control method for network of multiple protocol label switch structure |
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Non-Patent Citations (1)
| Title |
|---|
| ITU-T.Distributed RACF architecture for MPLS networks.《ITU-T Y.2174 SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Next Generation Networks – Quality of Service and performance》.2008, * |
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| CN101309229A (en) | 2008-11-19 |
| WO2010006545A1 (en) | 2010-01-21 |
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