CN101188554A - A method for dynamically establishing label switching path tunnel and allocating resource - Google Patents
A method for dynamically establishing label switching path tunnel and allocating resource Download PDFInfo
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- CN101188554A CN101188554A CNA2007101246600A CN200710124660A CN101188554A CN 101188554 A CN101188554 A CN 101188554A CN A2007101246600 A CNA2007101246600 A CN A2007101246600A CN 200710124660 A CN200710124660 A CN 200710124660A CN 101188554 A CN101188554 A CN 101188554A
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Abstract
The invention discloses a method for dynamically establishing a label exchange route tunnel and distributing resources. The method comprises the steps that a tactical decision function unit or other function units sponsor(s) a resource request to a resource-transmitted control function unit; after the resource-transmitted control function unit receives the resource request and detects that the label exchange route tunnel resource does not exist in the network, the resource establishment request for establishing the label exchange route tunnel and distributing the label exchange route tunnel resource is sent to an independent management system; the independent management system accomplishes the establishment of the label exchange route tunnel according to the resource establishment request. Due to the adoption of the method of the invention, the mechanism to dynamically establish the MPLS LSP tunnel and to distribute the network resources supplements the definition mechanism of the prior standard on how an MPLS-TE-based NGN network makes an LSP tunnel establishment.
Description
Technical field
The present invention relates to the next generation network field, relate in particular to a kind of method of dynamically setting up label switched path tunnel and resource allocation.
Background technology
At present ITU-NGN (International Telecommunication Union NextGeneration Network, International Telecommunications Union-next generation network) resource allocation and controlled function subsystem, be RACF (Resource Admission Control Function, resource accommodating control function) definition (Y.RACF-Y.2111 standard) and based on MPLS-TE (Multi-Protocol Label SwitchTraffic Engineering, multiprotocol label switching-traffic engineering) in the definition of RACF (Y.MPLS-RACF standard), the LSP (Label SwitchPath) that is primarily aimed under the network management system controls is the mode that label switched path static state provides in advance, and is not specifically related to for dynamic mode.
As shown in Figure 1, the ITU-T NGN RACF frame diagram of prior art, comprise TRE-FE (Transport Resource Enforcement Function Entity, transmission resource execution functional unit), PE-FE (Policy Enforcement Function Entity, the policy enforcement function unit), TRC-FE (Transport Resource Control Function Entiy, the transmission resource control function units), PD-FE (Policy Decision Function Entity, strategy decisive function unit) and RACF.
In the accompanying drawing 1, the Rs interface is responsible for service control layer (SCF) and is carried out the relevant mutual of service conversation abstract resource request with the strategy decisive function unit (PD-FE) that transmits network control preparative layer (RACF); The Rt interface be responsible for strategy decisive function unit PD-FE with transmit request that net resource control function units (TRC-FE) carries out the session Internet resources and distribution relevant alternately; The Rw interface is responsible for strategy decisive function unit PD-FE and transport layer policy enforcement function unit (PE-FE) issues corresponding strategy, as ductility limit speed, flow label, gateway function, the Rc interface is responsible for transmitting the network topology of network (Transport Functions) and the collection and the resource operating position in the network operation process of resource information collected feedback etc.
Therefore, prior art awaits improving and development.
Summary of the invention
Problem to be solved by this invention is to provide a kind of method of dynamically setting up label switched path tunnel and resource allocation, and this method realizes the dynamic foundation and the Resource Allocation in Networks in MPLS-LSP tunnel.
In order to solve the problems of the technologies described above, technical scheme of the present invention comprises the steps:
A, strategy decisive function unit or other functional units are initiated resource request to transmitting resource control function units;
B, described transmission resource control function units receive described resource request, check out do not have the label switched path tunnel resource in the network after, send the resource set up label switched path tunnel and distributing labels switching path tunnel resource and set up request to the described system that manages independently;
C, the described system that manages independently set up request according to described resource, finish the foundation of described label switched path tunnel.
Described method wherein, also comprises following processing among the described step B:
Described transmission resource control function units sends the resource set up label switched path tunnel and distributing labels switching path tunnel resource and sets up request message to the described system that manages independently, comprises QoS parameter in the message.
Described method, wherein, described QoS parameter comprises bandwidth and preempting priority.
Described method wherein, also comprises following processing among the described step C:
After described label switched path was finished, described transmission resource control function units was known existing available label switched path tunnel resource.
Described method wherein, also comprises the steps: after the described step C
D, when needs carry out session service, the described system that manages independently will carry out extended operation to described label switched path tunnel.
Described method, wherein, described step D comprises the steps:
D1, described strategy decisive function unit or other functional units send the Session Resources request to described transmission resource control function units; Described other unit comprises the policy enforcement function unit, transmits resource execution functional unit;
D2, described transmission resource control function units receive described Session Resources request, check out do not have enough label switched path resource tunnels in the network after, manage the resource that system sends expandtabs switching path tunnel and distributing labels switching path tunnel resource independently and expand request to described;
D3, the described system that manages independently expand request according to described resource, finish the expansion of described label switched path tunnel.
Described method wherein, also comprises the steps: after the described step D
After E, session service finish, the described system that manages independently will carry out Internet resources reduction operation to described label switched path tunnel.
Described method, wherein, described step e comprises the steps:
E1, described strategy decisive function unit or other functional units send the conversation end request to described transmission resource control function units, and request discharges the session Internet resources; Described other unit comprises the policy enforcement function unit, transmits resource execution functional unit;
E2, described transmission resource control function units are according to described conversation end request, discharge Session Resources, simultaneously, after described transmission resource control function units is checked out described label switched path tunnel idling-resource, send the resource reduction request that reduces label switched path tunnel to the described system that manages independently;
E3, the described system that manages independently finish the reduction of described label switched path tunnel according to described resource reduction request.
Described method wherein, also comprises the steps: after the described step e
F, the described system that manages independently will carry out dismantling operation to described label switched path tunnel.
Described method, wherein, described step F comprises the steps:
F1, described strategy decisive function unit or other functional units send the conversation end request to described transmission resource control function units once more, and request discharges the session Internet resources; Described other unit comprises the policy enforcement function unit, transmits resource execution functional unit;
F2, described transmission resource control function units discharge Session Resources according to described conversation end request; Simultaneously, after described transmission resource control function units checks out that all session services of described label switched path have all finished, send the resource dismounting request of removing label switched path tunnel to the described system that manages independently;
Request is removed according to described resource by F3, the described system that manages independently, finishes the dismounting of described label switched path tunnel.
Adopt the inventive method, the mechanism of described dynamic MPLS lsp tunnel foundation and Resource Allocation in Networks has been replenished existing standard and how have been carried out the definition mechanism that lsp tunnel is set up for the NGN network based on MPLS-TE.
Description of drawings
Fig. 1 is resource accommodating control function (RACF) Organization Chart of ITU-T NGN in the prior art;
Fig. 2 is the flow chart that the dynamic MPLS lsp tunnel of the inventive method realization is set up;
Fig. 3 is the flow chart that the dynamic MPLS lsp tunnel of the inventive method realization expands;
Fig. 4 is the flow chart of the dynamic MPLS lsp tunnel reduction of the inventive method realization;
Fig. 5 is the flow chart that the dynamic MPLS lsp tunnel of the inventive method realization is removed.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in further detail.
The invention provides a kind of method of dynamically setting up label switched path tunnel and resource allocation, see also shown in the accompanying drawing 2, its realization flow may further comprise the steps:
201, PD-FE initiates service conversation resource request by the Rt interface to TRC-FE according to the service conversation request from SCF, asks corresponding session Internet resources; Or other functional units, comprise the policy enforcement function unit, transmit resource execution functional unit, initiate the service conversation resource request to TRC-FE, ask corresponding session Internet resources;
202, TRC-FE judges whether that according to relevant Internet resources and use information of collecting ready-made MPLS lsp tunnel is available, if do not have, then corresponding M PLS lsp tunnel is set up in the decision request;
203, TRC-FE manages system independently to MPLS-TE and initiates request, request is set up a new MPLS lsp tunnel for this session, and inform corresponding QoS (service quality) parameter, as bandwidth, preempting priority etc., perhaps TRC-FE can need to initiate new resource allocation request to managing system independently to avoid follow-up every session according to the corresponding strategies request than the more Internet resources of this conversation request; Wherein, describedly manage the control system that system is meant that traffic engineering (te) and LSP are created, safeguarded in the MPLS TE network independently, be the other system that is independent of outside the RACF, such as network management system (nms) or O﹠M system (OSS) or special systems such as traffic engineering (te) control system;
204, after MPLS-TE manages system independently and finishes the foundation of MPLS lsp tunnel according to the request of TRC-FE, can inform perhaps that this MPLS lsp tunnel of TRC-FE is set up and finish, also can not inform TRC-FE, know existing available MPLS lsp tunnel by other approach by TRC-FE;
205, after TRC-FE is known existing available MPLS lsp tunnel resource, for this service conversation distributes corresponding Internet resources;
206, TRC-FE responds the Resource Allocation in Networks success message to PD-FE.
In the foundation of finishing the Dynamic Label Switched Path tunnel and resource allocation, and when sending the session service request, dynamically lsp tunnel will expand flow process accordingly, see also accompanying drawing 3, and its realization flow comprises the steps:
301, PD-FE initiates the service conversation resource request according to the service conversation request from SCF to TRC-FE, and corresponding session Internet resources are expanded in request; Or other functional units, comprise the policy enforcement function unit, transmit resource execution functional unit, initiate the service conversation resource request to TRC-FE, ask corresponding session Internet resources;
302, TRC-FE judges whether that according to the relevant Internet resources of collecting and use information ready-made MPLS lsp tunnel and enough surplus resources are available, if corresponding tunnel is arranged, but does not have enough resources, and then corresponding M PLS lsp tunnel is expanded in request;
303, TRC-FE manages system independently to MPLS-TE and initiates resource expansion request, and the MPLS lsp tunnel resource of appointment is expanded in request, and informs corresponding qos parameter, as bandwidth, preempting priority etc.; Perhaps TRC-FE can need to initiate new resource allocation request to managing system independently to avoid follow-up every session according to the corresponding strategies request than the more Internet resources of this conversation request;
304, MPLS-TE manages system independently and expands request according to the resource of TRC-FE, after the resource of finishing the MPLSLSP tunnel expands, expands response request to the TRC-FE feedback; Can inform perhaps that this MPLS lsp tunnel of TRC-FE expands and finish, also can not inform TRC-FE, know existing available MPLS lsp tunnel resource by other approach by TRC-FE;
305, TRC-FE according to described expansion response request after, know existing available MPLS lsp tunnel resource after, for this service conversation distributes corresponding Internet resources;
306, TRC-FE responds the Internet resources expansion to PD-FE and is allocated successfully message.
After session service finishes, PD-FET will initiate the session service resource reduction request of dynamic lsp tunnel to RC-FE, see also accompanying drawing 4, and its realization flow comprises the steps:
401, PD-FE initiates the service conversation resource release request according to the service conversation ending request from SCF to TRC-FE, and request discharges the Internet resources of this service conversation; Or other functional units, comprise the policy enforcement function unit, transmit resource execution functional unit, initiate the service conversation resource request to TRC-FE, ask corresponding session Internet resources;
402, TRC-FE discharges corresponding M PLS LSP Internet resources;
403, TRC-FE reclaims success message to the PD-FE feedback resources;
404, TRC-FE is according to strategy, after whether decision needs immediately or waits the idling-resource of this MPLS LSP to arrive to a certain degree, and reduction MPLS lsp tunnel resource;
405, TRC-FE manages system independently to MPLS-TE and initiates MPLS lsp tunnel reduction request, and the resource of MPLS lsp tunnel is specified in the request reduction, and informs corresponding qos parameter;
406, MPLS-TE manages the resource reduction request of system according to TRC-FE independently, after finishing reduction to the resource of corresponding MPLS lsp tunnel, to described transmission resource control function units feedback reduction success response, can inform that perhaps this MPLS lsp tunnel resource of TRC-FE reduces successfully, can not inform yet, know the modification information of MPLS lsp tunnel resource by TRC-FE by other approach.
After session service stops, PD-FE will initiate the termination session service request of dynamic lsp tunnel to RC-FE, see also accompanying drawing 5, and its realization flow comprises the steps:
501, PD-FE stops request according to the service conversation from SCF, initiates the service conversation resource to TRC-FE and stops request, and request discharges the Internet resources of this service conversation; Or other functional units, comprise the policy enforcement function unit, transmit resource execution functional unit, initiate the service conversation resource request to TRC-FE, ask corresponding session Internet resources;
502, TRC-FE discharges corresponding M PLS LSP Internet resources;
503, TRC-FE reclaims success message to the PD-FE feedback resources;
504, TRC-FE checks that all service conversations of this MPLS lsp tunnel all finish, if then according to strategy, whether decision needs to remove this MPLS lsp tunnel;
505, TRC-FE manages system independently to MPLS-TE and initiates MPLS lsp tunnel resource dismounting request, and the resource of specifying the MPLS lsp tunnel is removed in request;
506, MPLS-TE manages system independently and removes request according to the resource of TRC-FE, finishes the resource of corresponding MPLS lsp tunnel is removed, and remove success response to described transmission resource control function units feedback; Can inform maybe that this MPLS lsp tunnel resource of TRC-FE is held and remove successfully, also can not inform, know the modification information of MPLS lsp tunnel resource by TRC-FE by other approach.
In addition, dynamic MPLS lsp tunnel of the present invention creates a mechanism and is very suitable in following NGN network Virtual network operator and provides conversation-based scene with service of strong autgmentability and real-time to the user.
In sum, adopt the inventive method, the mechanism of described dynamic MPLS lsp tunnel foundation and Resource Allocation in Networks has been replenished existing standard and how have been carried out the definition mechanism that lsp tunnel is set up for the NGN network based on MPLS-TE.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (10)
1. a method of dynamically setting up label switched path tunnel and resource allocation comprises the steps:
A, strategy decisive function unit or other functional units are initiated resource request to transmitting resource control function units;
B, described transmission resource control function units receive described resource request, check out do not have the label switched path tunnel resource in the network after, send the resource set up label switched path tunnel and distributing labels switching path tunnel resource and set up request to the described system that manages independently;
C, the described system that manages independently set up request according to described resource, finish the foundation of described label switched path tunnel.
2. method according to claim 1 is characterized in that, also comprises following processing among the described step B:
Described transmission resource control function units sends the resource set up label switched path tunnel and distributing labels switching path tunnel resource and sets up request message to the described system that manages independently, comprises QoS parameter in the message.
3. method according to claim 2 is characterized in that described QoS parameter comprises bandwidth and preempting priority.
4. method according to claim 1 is characterized in that, also comprises following processing among the described step C:
After described label switched path was finished, described transmission resource control function units was known existing available label switched path tunnel resource.
5. method according to claim 1 is characterized in that, also comprises the steps: after the described step C
D, when needs carry out session service, the described system that manages independently will carry out extended operation to described label switched path tunnel.
6. method according to claim 5 is characterized in that described step D comprises the steps:
D1, described strategy decisive function unit or other functional units send the Session Resources request to described transmission resource control function units; Described other unit comprises the policy enforcement function unit, transmits resource execution functional unit;
D2, described transmission resource control function units receive described Session Resources request, check out do not have enough label switched path resource tunnels in the network after, manage the resource that system sends expandtabs switching path tunnel and distributing labels switching path tunnel resource independently and expand request to described;
D3, the described system that manages independently expand request according to described resource, finish the expansion of described label switched path tunnel.
7. method according to claim 5 is characterized in that, also comprises the steps: after the described step D
After E, session service finish, the described system that manages independently will carry out Internet resources reduction operation to described label switched path tunnel.
8. method according to claim 7 is characterized in that described step e comprises the steps:
E1, described strategy decisive function unit or other functional units send the conversation end request to described transmission resource control function units, and request discharges the session Internet resources; Described other unit comprises the policy enforcement function unit, transmits resource execution functional unit;
E2, described transmission resource control function units are according to described conversation end request, discharge Session Resources, simultaneously, after described transmission resource control function units is checked out described label switched path tunnel idling-resource, send the resource reduction request that reduces label switched path tunnel to the described system that manages independently;
E3, the described system that manages independently finish the reduction of described label switched path tunnel according to described resource reduction request.
9. method according to claim 7 is characterized in that, also comprises the steps: after the described step e
F, the described system that manages independently will carry out the Internet resources dismantling operation to described label switched path tunnel.
10. method according to claim 9 is characterized in that described step F comprises the steps:
F1, described strategy decisive function unit or other functional units send the conversation end request to described transmission resource control function units once more, and request discharges the session Internet resources; Described other unit comprises the policy enforcement function unit, transmits resource execution functional unit;
F2, described transmission resource control function units discharge Session Resources according to described conversation end request; Simultaneously, after described transmission resource control function units checks out that all session services of described label switched path have all finished, send the resource dismounting request of removing label switched path tunnel to the described system that manages independently;
Request is removed according to described resource by F3, the described system that manages independently, finishes the dismounting of described label switched path tunnel.
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Cited By (7)
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| WO2010043131A1 (en) * | 2008-10-15 | 2010-04-22 | 华为技术有限公司 | Method, apparatus and system for admission controlling in metropolitan area network |
| CN101557303B (en) * | 2008-04-11 | 2011-07-06 | 华为技术有限公司 | Path establishing request method, path establishing method and system |
| CN101309224B (en) * | 2008-06-30 | 2011-07-20 | 中兴通讯股份有限公司 | Resource admission control system and method for network of multiple protocol label switching structure |
| CN102299852A (en) * | 2011-09-02 | 2011-12-28 | 清华大学 | Control method and device for binding mapping between inter-domain link and intra-domain channel for cross-domain service |
| CN102377630A (en) * | 2011-10-13 | 2012-03-14 | 华为技术有限公司 | Traffic engineering tunnel-based virtual private network implementation method and traffic engineering tunnel-based virtual private network implementation system |
| WO2015101004A1 (en) * | 2013-12-30 | 2015-07-09 | 中兴通讯股份有限公司 | Measurement configuration method and device and base station |
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| JP3729051B2 (en) * | 2000-10-18 | 2005-12-21 | 日本電気株式会社 | Inter-domain routing apparatus, system and method |
| CN1761219B (en) * | 2004-10-12 | 2010-04-28 | 华为技术有限公司 | Method for implementing automatic discovery of topological structure in MPLS ring net |
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| CN101557303B (en) * | 2008-04-11 | 2011-07-06 | 华为技术有限公司 | Path establishing request method, path establishing method and system |
| CN101309224B (en) * | 2008-06-30 | 2011-07-20 | 中兴通讯股份有限公司 | Resource admission control system and method for network of multiple protocol label switching structure |
| WO2010043131A1 (en) * | 2008-10-15 | 2010-04-22 | 华为技术有限公司 | Method, apparatus and system for admission controlling in metropolitan area network |
| US8743686B2 (en) | 2008-10-15 | 2014-06-03 | Huawei Technologies Co., Ltd. | Method, device, and system for admission control in metropolitan area network |
| CN102299852A (en) * | 2011-09-02 | 2011-12-28 | 清华大学 | Control method and device for binding mapping between inter-domain link and intra-domain channel for cross-domain service |
| CN102377630A (en) * | 2011-10-13 | 2012-03-14 | 华为技术有限公司 | Traffic engineering tunnel-based virtual private network implementation method and traffic engineering tunnel-based virtual private network implementation system |
| WO2015101004A1 (en) * | 2013-12-30 | 2015-07-09 | 中兴通讯股份有限公司 | Measurement configuration method and device and base station |
| WO2015158250A1 (en) * | 2014-04-17 | 2015-10-22 | 华为技术有限公司 | Resource allocation method, packet communication method and device |
| US10425354B2 (en) | 2014-04-17 | 2019-09-24 | Huawei Technologies Co., Ltd. | Resource allocation method, packet communication method, and apparatus |
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