CN100349419C - Method of implementing resource allocation in bearer network - Google Patents
Method of implementing resource allocation in bearer network Download PDFInfo
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- CN100349419C CN100349419C CNB2005100017785A CN200510001778A CN100349419C CN 100349419 C CN100349419 C CN 100349419C CN B2005100017785 A CNB2005100017785 A CN B2005100017785A CN 200510001778 A CN200510001778 A CN 200510001778A CN 100349419 C CN100349419 C CN 100349419C
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Abstract
The present invention discloses a method for realizing the distribution of bearer network resources. Firstly, an LSP of a bearer network is divided into at least two QoS grades by the method, and the coincidence relation of a business type and each QoS grade is arranged. A CA is further used as a current business flow by the method so as to send a connection resource request to a bearer control layer. The QoS grade corresponding to the business type of the business flow is determined after the connection resource request sent by the CA is received by the bearer control layer, and the bearer control layer judges whether an LSP resource corresponding to the QoS grade is adequate, if the LSP resource corresponding to the QoS grade is adequate, the LSP resource of the QoS grade is distributed for the current business flow, then a connection resource response of resource distribution success is sent to the CA, and a flow mapping command is started; otherwise, a connection resource response of resource distribution failure is sent to the CA. The proposal of the present invention realizes that resources are distributed by the bearer control layer according to the business types, the coincidence relation of the business type and the QoS grade, which is arranged by the method for realizing the distribution of bearer network resources, can be flexibly customized according to requirements, and the operation quality of business is enhanced.
Description
Technical field
The present invention relates to the resource allocation techniques in the Internet network, relate to a kind of method that realizes the bearer network resource allocation or rather.
Background technology
Continuous increase along with the Internet network size, various network services are fallen over each other to emerge in large numbers, various advanced persons' multimedia system emerges in an endless stream, the multimedia services such as HTTP(Hypertext Transport Protocol) that this causes Internet network needs often to send sudden high file transfer protocol (FTP) (FTP) or contain image file.For the real time business in the network, because characteristics such as its propagation delay time to network, delay jitter are comparatively responsive, so network is bigger to the influence of real time business when transmission FTP or HTTP etc. are professional.And multimedia service a large amount of network bandwidth that also accounted for makes the key business that needs in the existing network to guarantee bandwidth be difficult to be transmitted reliably.
At the problems referred to above, industry has proposed various service quality (QoS) technology, such as, internet engineering task group (IETF) has just been set up a lot of service model and machine-processed to satisfy the demand of network.In these QoS technology, industry is relatively approved is that access and the edge at network that IETF proposes uses integrated service model (Int-Serv), uses the technical scheme of differentiated service model (Diff-Serv) at server.Because the Diff-Serv in this scheme has only set preferential registration and ensured QoS, though therefore use the network of this scheme to have the high characteristics of line efficiency, the transmission reliability of whole network and laser propagation effect are difficult to guarantee.For addressing this problem, industry has proposed promptly to have proposed to have the Diff-Serv model of independent bearing control layer for Diff-Serv introduces an independently scheme of bearer control layer on the basis of original Diff-Serv.This solution is between the service control layer of Diff-Serv and bearer network layer bearer control layer to be set, and set bearer control layer is made up of a plurality of load network resource manager, and the network configuration that is provided with bearer control layer as shown in Figure 1.Wherein, load network resource manager can be bandwidth broker device (BB, Bandwidth Broker), it also can be the QoS server, explorer or other equipment, the corresponding load network resource manager of each bearer network among the Diff-Serv, dispose the rule and the network topology of this bearer network by load network resource manager, and be the traffic assignments bandwidth resources of user applies, transmit the request and the result of user applies service bandwidth between each load network resource manager by signaling, and load network resource manager is the routing information of user's business application distribution.
If the load network resource manager in the bearer control layer is CM, then bearer control layer for the service request Resources allocation by the realization that between source CM and purpose CM, connects.When connecting, source CM hop-by-hop CM downstream sends the connection resource request, until purpose CM; Purpose CM returns the connection resource response again, until source CM.After bearer control layer had been set up connection, source CM was with call information, the qos parameter of this calling, and the ingress edge router (ER) that the routing information of determining in the process sends to this service request is set up in this connection.Set up in the process above-mentioned, each CM distribute in this management domain for this time service request and its with the corresponding management domain of downstream CM between the territory between the path, and be this time service request distribution bandwidth information.
On bearer network, often have the multiple business of data, voice, video and so on, these business have different qos requirements, such as, the business need less time delay that has, the business need that has can guarantee certain bandwidth, the business that has then requires less packet loss.That is to say that dissimilar business often needs different resource distribution modes.Fig. 2 and some the professional qos requirement at present that is shown in Figure 3.
In present bearer network, the most equipment from the Access Network to the backbone network has all been supported the enforcement of QoS, such as, can realize at present the functions such as management, priority query's management of shaping, the flow rate of professional classification and mark, flow.But since bearer control layer can't the aware application layer service type of service, therefore can't come Resources allocation according to type of service.Present bearer control layer is often according to the pairing qos requirement preset in advance of miscellaneous service in the world, rather than carries out resource allocation according to type of service.
Summary of the invention
In view of this, subject matter to be solved by this invention is to provide a kind of method that realizes the bearer network resource allocation, to carry out resource allocation according to type of service.
For overcoming the above problems, technical scheme of the present invention is achieved in that a kind of method that realizes the bearer network resource allocation, the label switching path LSP of bearer network is divided at least two service quality QoS grades, and the corresponding relation of type of service and each QoS grade is set, this method further may further comprise the steps:
A. Call Agent CA is that current service route bearer control layer sends the connection resource request;
B. bearer control layer is after receiving the connection resource request that CA sends, determine the pairing QoS grade of type of service of this Business Stream, and judge whether the pairing LSP resource of this QoS grade is enough, if, then be the LSP resource of this QoS grade of current business flow distribution, enter step c afterwards; Otherwise, send the connection resource response of resource allocation failure to CA, and finish this handling process;
C. bearer control layer sends the connection resource response of resource allocation success to CA, and starts the stream mapping directive.
The correspondence setting of described type of service and each QoS grade is in CA;
Among the step a, described CA is before sending the connection resource request, further comprise: determine this Business Stream corresponding service type, determine the pairing QoS grade of this type of service according to the corresponding relation of self preserving, and determined QoS grade is arranged in the connection resource request;
Among the step b, described bearer control layer determines that the pairing QoS grade of the type of service of current business flow is: obtain this QoS class information from the connection resource request that CA sends.
The correspondence setting of described type of service and each QoS grade is at bearer control layer;
Among the step a, comprise current business flow corresponding service type in the connection resource request that described CA sends;
Among the step b, described bearer control layer determines that the pairing QoS grade of the type of service of current business flow is: obtain current business flow corresponding service type from the connection resource request that CA sends, and determine the pairing QoS grade of this type of service according to the corresponding relation of self preserving.
The correspondence setting of described type of service and each QoS grade is at bearer control layer;
Among the step a, comprise current business flow corresponding service type in the connection resource request that described CA sends;
Among the step b, described bearer control layer determines that the pairing QoS grade of the type of service of current business flow comprises:
B1. the source load network resource manager in the bearer control layer is obtained the pairing type of service of current business flow from the connection resource request that CA sends, the corresponding relation of preserving according to self is determined the QoS grade of this type of service correspondence, and determined QoS grade is sent to the purpose load network resource manager by connection resource request hop-by-hop;
B2. in the bearer control layer other load network resource manager except that the load network resource manager of source by the pairing QoS grade of type of service of the connection resource acquisition request current business flow that receives.
This method may further include: allow to seize sign for one or more the LSP resource of QoS grade correspondence is provided with;
Among the step b, described bearer control layer and before the connection resource response that sends the resource allocation failure to CA, further comprises after the LSP resource of determining current QoS grade correspondence is not enough:
Judging whether and LSP resource enough current resource allocation corresponding with other QoS grades has allows to seize sign, if, then be this LSP resource of current business flow distribution, enter step c afterwards; Otherwise, carry out the step that sends the connection resource response of resource allocation failure to CA.
This method may further include: the LSP resource that low QoS grade is set allows to be taken by high QoS grade corresponding service stream;
Among the step b, described bearer control layer and before the connection resource response that sends the resource allocation failure to CA, further comprises after the LSP resource of determining current QoS grade correspondence is not enough:
Judge whether to exist low and LSP resource enough current resource allocations than current QoS grade, if, then be this LSP resource of current business flow distribution, enter step c afterwards; Otherwise, carry out the step that sends the connection resource response of resource allocation failure to CA.
The LSP of described bearer network is the label switched path E-LSP based on priority; Described LSP with bearer network is divided at least two QoS grades: by the EXP in the LSP label of bearer network E-LSP E-LSP is divided.
Describedly E-LSP is divided into: E-LSP is divided into 8 QoS grades by the EXP in the LSP label of bearer network E-LSP.
The present invention program is divided into a plurality of QoS grades by the LSP with bearer network, and the corresponding relation of each QoS grade and type of service is set, determine corresponding LSP resource by bearer control layer according to the QoS grade of this business correspondence, and be that current business is carried out resource allocation, thereby realized that bearer control layer carries out resource allocation according to type of service according to this resource.
The corresponding relation of type of service that the present invention program is set and QoS grade can be customized neatly by the needs of Virtual network operator according to self, thereby has improved professional quantity of operation.
In addition, the present invention program also further by seizing the pairing LSP resource of other QoS grades, makes it possible to realize more neatly the resource allocation of bearer network.
Description of drawings
Fig. 1 is the Diff-Serv structure of models schematic diagram with independent bearing control layer;
Fig. 2 is some the present type of service and the schematic diagram that concerns of professional performance;
Fig. 3 is every index performance schematic diagram of present voice and video business;
Fig. 4 is determined the realization flow figure of QoS grade by CA for the present invention;
Fig. 5 is determined the realization flow figure of QoS grade by bearer control layer for the present invention.
Embodiment
In the MPLS+Diffserv system, require LSR (LSR) in the MPLS network that the association message of Diffserv of carrying is carried out every redirect and be distributed as (PHB, Per-Hop Behavior), this just requires LSR can obtain PHB information.LSP (E-LSP) based on priority is exactly the scheme that characterizes PHB by the EXP that uses 3bit in the LSP label, and therefore, LSR can determine PHB by E-LSP.The EXP of 3bit can also represent 8 QoS grades among the E-LSP, thereby can E-LSP be divided into 8 QoS grades by this EXP, that is to say that E-LSP can be divided into 8 kinds, and every kind at different QoS grades.
The present invention program mainly is based on above-mentioned situation, and the corresponding relation of QoS grade among type of service and the E-LSP is set, and makes bearer control layer can determine this QoS grade, thereby makes bearer control layer distribute corresponding business stream according to this QoS grade.
Specifically, the corresponding relation of type of service and QoS grade can be arranged among the CA among the present invention program.In this case, CA should determine corresponding QoS grade according to the type of service of this corresponding relation and current business flow, and this QoS grade is sent to bearer control layer by the connection resource request according to service route bearer control layer application resource the time.Bearer control layer then carries out resource allocation according to the pairing LSP resource of this QoS grade.
Because CA sends to the type of service of having carried current business flow in the connection resource request of bearer control layer, therefore the corresponding relation of type of service and QoS grade can also be set directly at bearer control layer.Like this, bearer control layer is after receiving the connection resource request, at first should be according to the type of service of carrying in this connection resource request, and the type of service of self preserving and the corresponding relation of QoS grade, determine the pairing QoS grade of this Business Stream, and then carry out resource allocation according to the pairing LSP resource of this QoS grade.
Reaching specific embodiment below more in conjunction with the accompanying drawings is described in further detail the present invention program.
Because these two kinds of schemes are similar substantially, just preserve corresponding relation and determine the position difference of QoS grade according to corresponding relation, therefore at first the scheme of corresponding relation that type of service and QoS grade are set in CA is elaborated below.This realization flow as shown in Figure 4, corresponding following steps:
The present invention program can certainly be the splitting scheme that adopts present E-LSP to the division of LSP, and this scheme should be preferred version.That is to say that bearer network adopts E-LSP, and divide, specifically can be divided into 8 QoS grades by the EXP among the E-LSP.
Each CM in step 403, the bearer control layer obtains the QoS grade in this connection resource request after receiving the connection resource request, and judges according to this grade point whether the LSP resource of corresponding grade is enough, if then enter step 404; Otherwise, enter step 407.
Each CM in step 405, the bearer control layer except that the CM of source distributes self, and next jumps the LSP resource that CM returns and send to last a jumping CM by the connection resource response, until source CM.
Carried bearer control layer in the response of connection resource that source CM sent and be the label stack, qos parameter of the current entire path that Business Stream distributed etc., wherein, qos parameter has carried bandwidth information.
In addition, source CM startup stream mapping directive specifically is the information such as label stack that issue session id, stream information, qos parameter, flow descriptor and entire path to ER.
Promptly realized resource allocation by above step.
Certainly, in the resource allocation process of reality, the LSP resources left that tends to occur certain QoS grade is more, and the situation of the LSP inadequate resource of another or several QoS grades, therefore, can allow to seize sign for the more LSP resource of those surplus resources is provided with.Like this, in above-mentioned steps 403, when certain CM needs execution in step 407 because of the LSP resource of determining current grade correspondence is not enough, whether the LSP resource that at first should judge the resource allocation that other grades are pairing and enough current has allows the sign seized, if have, then utilizing this LSP resource is current traffic flow assignment LSP resource; Otherwise execution in step 407 again.
Processing at resource race to control, can also be set to: if the present type of service correspondence is high QoS grade, then can take the LSP resource of low QoS grade, like this, each CM is before execution in step 407, should judge the current LSP the resource whether pairing and enough current resource allocation of low QoS grade is arranged, if having, then utilizing this LSP resource is current traffic flow assignment LSP resource; Otherwise execution in step 407 again.
Above step is the corresponding relation that type of service and QoS grade are set in CA, realize resource allocation by bearer control layer afterwards, if this corresponding relation is set in bearer control layer, then its implementation procedure as shown in Figure 5.Process shown in Figure 5 is compared with process shown in Figure 4, and difference only is: process need shown in Figure 4 is provided with the corresponding relation of type of service and QoS grade in CA, and Fig. 5 is the corresponding relation that type of service and QoS grade are set in bearer control layer; Fig. 4 determines the QoS grade by CA, and this QoS grade is sent to bearer control layer, and Fig. 5 then is that type of service of carrying in the connection resource request of being sent according to CA by bearer control layer and the corresponding relation of self preserving are determined the QoS grade.Therefore no longer flow process shown in Figure 5 is described in detail.
Certainly, in flow process shown in Figure 5, be to determine the pairing QoS grade of present type of service according to the corresponding relation of self preserving by each CM in the bearer control layer, in fact can also only determine corresponding QoS grade by source CM, and next jumps CM by source CM this QoS grade to be issued to it by the connection resource request, each CM afterwards is by the connection resource acquisition request and issue this QoS grade, until purpose CM.
The above only is the present invention program's preferred embodiment, not in order to limit protection scope of the present invention.
Claims (8)
1, a kind of method that realizes the bearer network resource allocation, it is characterized in that, the label switching path LSP of bearer network is divided at least two service quality QoS grades, and the corresponding relation of type of service and each QoS grade is set, this method further may further comprise the steps:
A. Call Agent CA is that current service route bearer control layer sends the connection resource request;
B. bearer control layer is after receiving the connection resource request that CA sends, determine the pairing QoS grade of type of service of this Business Stream, and judge whether the pairing LSP resource of this QoS grade is enough, if, then be the LSP resource of this QoS grade of current business flow distribution, enter step c afterwards; Otherwise, send the connection resource response of resource allocation failure to CA, and finish this handling process;
C. bearer control layer sends the connection resource response of resource allocation success to CA, and starts the stream mapping directive.
2, method according to claim 1 is characterized in that, the correspondence setting of described type of service and each QoS grade is in CA;
Among the step a, described CA is before sending the connection resource request, further comprise: determine this Business Stream corresponding service type, determine the pairing QoS grade of this type of service according to the corresponding relation of self preserving, and determined QoS grade is arranged in the connection resource request;
Among the step b, described bearer control layer determines that the pairing QoS grade of the type of service of current business flow is: obtain this QoS class information from the connection resource request that CA sends.
3, method according to claim 1 is characterized in that, the correspondence setting of described type of service and each QoS grade is at bearer control layer;
Among the step a, comprise current business flow corresponding service type in the connection resource request that described CA sends;
Among the step b, described bearer control layer determines that the pairing QoS grade of the type of service of current business flow is: obtain current business flow corresponding service type from the connection resource request that CA sends, and determine the pairing QoS grade of this type of service according to the corresponding relation of self preserving.
4, method according to claim 1 is characterized in that, the correspondence setting of described type of service and each QoS grade is at bearer control layer;
Among the step a, comprise current business flow corresponding service type in the connection resource request that described CA sends;
Among the step b, described bearer control layer determines that the pairing QoS grade of the type of service of current business flow comprises:
B1. the source load network resource manager in the bearer control layer is obtained the pairing type of service of current business flow from the connection resource request that CA sends, the corresponding relation of preserving according to self is determined the QoS grade of this type of service correspondence, and determined QoS grade is sent to the purpose load network resource manager by connection resource request hop-by-hop;
B2. in the bearer control layer other load network resource manager except that the load network resource manager of source by the pairing QoS grade of type of service of the connection resource acquisition request current business flow that receives.
5, according to any described method in the claim 1 to 4, it is characterized in that this method further comprises: allow to seize sign for one or more the LSP resource of QoS grade correspondence is provided with;
Among the step b, described bearer control layer and before the connection resource response that sends the resource allocation failure to CA, further comprises after the LSP resource of determining current QoS grade correspondence is not enough:
Judging whether and LSP resource enough current resource allocation corresponding with other QoS grades has allows to seize sign, if, then be this LSP resource of current business flow distribution, enter step c afterwards; Otherwise, carry out the step that sends the connection resource response of resource allocation failure to CA.
6, according to any described method in the claim 1 to 4, it is characterized in that this method further comprises: the LSP resource that low QoS grade is set allows to be taken by high QoS grade corresponding service stream;
Among the step b, described bearer control layer and before the connection resource response that sends the resource allocation failure to CA, further comprises after the LSP resource of determining current QoS grade correspondence is not enough:
Judge whether to exist low and LSP resource enough current resource allocations than current QoS grade, if, then be this LSP resource of current business flow distribution, enter step c afterwards; Otherwise, carry out the step that sends the connection resource response of resource allocation failure to CA.
According to any described method in the claim 1 to 4, it is characterized in that 7, the LSP of described bearer network is the label switched path E-LSP based on priority; Described LSP with bearer network is divided at least two QoS grades: by the EXP in the LSP label of bearer network E-LSP E-LSP is divided.
8, method according to claim 7 is characterized in that, describedly by the EXP in the LSP label of bearer network E-LSP E-LSP is divided into: E-LSP is divided into 8 QoS grades.
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| CN102422673A (en) * | 2009-05-05 | 2012-04-18 | Lg电子株式会社 | Server for control plane at mobile communication network and method for controlling establishment of connection thereof |
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| CN101175039B (en) * | 2006-10-25 | 2011-02-09 | 华为技术有限公司 | Multi-stream service transmission method and its device and system |
| CN101163100B (en) | 2007-11-12 | 2011-08-24 | 中兴通讯股份有限公司 | Tunnel mapping method |
| CN101541044B (en) * | 2008-03-18 | 2012-04-18 | 华为技术有限公司 | Scheduling method and scheduling processing device |
| CN102036316A (en) * | 2009-09-24 | 2011-04-27 | 中兴通讯股份有限公司 | Method and system for informing user equipment of bearer establishment failure |
| CN102769922A (en) * | 2011-05-05 | 2012-11-07 | 鼎桥通信技术有限公司 | Service scheduling method in wireless communication system |
| CN102833275A (en) * | 2011-06-14 | 2012-12-19 | 中兴通讯股份有限公司 | Document transmission control method and device |
| CN106341351B (en) * | 2016-09-30 | 2019-05-24 | 西安空间无线电技术研究所 | A kind of path resources distribution method distinguished in hybrid network based on QoS |
| CN108513723B (en) * | 2017-06-23 | 2022-06-24 | 北京小米移动软件有限公司 | Method and device for determining time-frequency resource preemption and user equipment |
| CN109245949B (en) * | 2018-10-31 | 2022-03-01 | 新华三技术有限公司 | Information processing method and device |
| CN113099535B (en) * | 2021-03-29 | 2022-08-12 | 北京邮电大学 | Power communication multi-service bearing method and device |
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| WO2002011461A2 (en) * | 2000-07-31 | 2002-02-07 | Telefonaktiebolaget L M Ericsson (Publ) | DYNAMIC QoS MANAGEMENT IN DIFFERENTIATED SERVICES USING BANDWIDTH BROKERS, RSVP AGGREGATION AND LOAD CONTROL PROTOCOLS |
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