CN100413254C - Method of implementing resource state synchronous in network with independent bearing control layer - Google Patents
Method of implementing resource state synchronous in network with independent bearing control layer Download PDFInfo
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- CN100413254C CN100413254C CNB2005100985409A CN200510098540A CN100413254C CN 100413254 C CN100413254 C CN 100413254C CN B2005100985409 A CNB2005100985409 A CN B2005100985409A CN 200510098540 A CN200510098540 A CN 200510098540A CN 100413254 C CN100413254 C CN 100413254C
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Abstract
The present invention relates to a method for synchronizing resource states in a network with independent bearing control layers. The core of the present invention is: a non real-time synchronization method is adopted between bearing network control servers to synchronize the resource states. The present invention specifically comprises: under the condition that the resources are adequate, the resource states are not synchronized real-timely; under the condition that some resources are inadequate, only the resources which are changed and are inadequate are synchronized. Therefore, in the present invention, in the process of synchronizing the bearing network control servers, the adopted synchronization information quantity is less, so that under the condition of smaller occupied network overhead, the synchronization of the bearing network resources can be realized.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to a kind of synchronous method of realization resource status in the independent bearing control layer network that has.
Background technology
Along with the continuous increase of Internet scale, various network services are fallen over each other to emerge in large numbers, and advanced multimedia system emerges in an endless stream.Because real time business is comparatively responsive to characteristics such as network transfer delay, delay jitters, when sudden high FTP (file transfer) being arranged on the network or contain the business such as HTTP (HTML (Hypertext Markup Language)) of image file, real time business will be subjected to very big influence; On the other hand, multimedia service a large amount of bandwidth that accounted for, like this, the key business that existing network will guarantee just is difficult to be transmitted reliably.
For these reasons, various QoS (service quality) technology is arisen at the historic moment.IETF has advised a lot of service models and mechanism, to satisfy the demand of QoS.What industry was relatively approved at present is to use integrated service model (Int-Serv) at the access and the edge of network, uses differentiated service model (Diff-serv) at server.Though the differentiated service model is only set priority level and ensured that the QoS measure has the high characteristics of line efficiency, concrete effect is difficult to prediction.
For this reason, industry begins to introduce an independently bearer control layer for backbone network differentiated service Diff-Serv, set up the special Diff-Serv qos signaling mechanism of a cover, as in order to promote the application of Diff-Serv, on the common QBone try net that promotes of IETF and some manufacturers and research institution, utilized bandwidth proxy server (Bandwidth Broker) model is realized Internet resources and Topology Management, has some other manufacturer to propose similar QoS server/explorer technology and manages topological resource and coordinate the QoS ability in each differentiated service Diff-Serv zone.Each method all is to set up the topological resource of a resource management layer supervising the network specially for Differentiated Services Diff-Serv network, as shown in Figure 1, above-mentioned resource management Differentiated Services Diff-Serv model can be called the network model with independent bearing control layer.
In the network model of bearer control layer is independently arranged, the bearer network Control Server has disposed rule and network topology, service bandwidth application Resources allocation for the client, described bearer network Control Server comprises BB (Bandwidth Broker, bandwidth broker device) or QoS server/RM (explorer).The bearer network Control Server of each management domain transmits client's service bandwidth application request and result each other by signaling, and load network resource manager is the routing information of professional application distribution etc.
Owing to need the network topology in this territory of static configuration on each bearer network Control Server, promptly not mutual each other topology information, therefore, relatively large for the configuration amount that cross-domain resource request need be finished on bearing control server, thereby also just be difficult to guarantee the accurate of configuration information.Simultaneously, for the change in resources in its territory, the dynamically perception of this territory like this, causes the accuracy of the topology information of this territory preservation to guarantee.Therefore, the global path and the bandwidth that can't flow according to the topology information computing service of preserving in advance in the service access territory.
For this reason, provide another kind of corresponding implementation at present, be specially:
In the network model of bearer control layer is independently arranged, exchange the resource state information of being responsible for separately in the subnet mutually by the bearer network Control Server, as bandwidth and routing information, each bearer network Control Server can be set up the resource information bank of a whole network domains like this.When the bearer network Control Server is received the resource request of a Business Stream, needn't communicate by letter with other bearer network Control Servers, directly just can calculate and return the resource check result of an entire domain based on the resource information bank of whole network domains.
As can be seen, under this mechanism, all bearer network Control Servers all carry out whole resource statuss of subnet after admitting each access success synchronous, admits new the calling again.Therefore, between the bearer network Control Server behind access success each time, need exchange the resource state information of being responsible for separately in the subnet mutually by a large amount of message, frequent interacting message and a large amount of signaling informations will take a large amount of Internet resources, therefore, will have influence on the communication performance of network.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of synchronous method of realization resource status in the independent bearing control layer network that has, thus can be by the source synchronous between less synchronizing information amount realization bearer network Control Server.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of synchronous method of realization resource status in the independent bearing control layer network that has, comprising:
When the resource state information in having the independent bearing control layer network changes, the employing non real-time upgrades, the measurement value that even described resource state information changes meets predetermined condition, then carries out only operating at the renewal of the described resource state information that changes in described network.
Described predetermined condition comprises:
Predetermined critical value, and/or preset time information, and/or predetermined change in resources amount with independent bearing control layer Internet resources.
Method of the present invention specifically comprises:
A, determine to have the critical value of independent bearing control layer Internet resources;
B, when to having after bearer network Control Server in the independent bearing control layer network finishes resource allocation process, surplus resources and critical value are compared, and carry out the resource status Synchronous Processing according to comparative result.
Described critical value comprises:
A concrete numerical value, perhaps, an interval value that comprises higher limit and lower limit.
Described steps A comprises:
Set the critical value information of bearer network resource according to professional needed bandwidth resources with the maximum of carrying out in the independent bearing control layer network.
Described steps A comprises:
For each label switching path LSP is provided with corresponding critical value respectively.
Described method also comprises:
In having the independent bearing control layer network, carry out the exchange of initial resource state information between the bearer network Control Server, and in each bearer network Control Server, set up the resource information bank of whole network domains.
Described step B comprises:
B1, described bearer network Control Server are after call has assigned its resource needed, to return resource allocation result to service control layer;
B2, check whether the resources left bandwidth of each LSP that takies in this resource allocation process is lower than corresponding critical value, if be lower than, the Synchronous Processing of then notifying other bearer network Control Servers to carry out resource status, otherwise, do not deal with.
Each LSP that takies in described this resource allocation process comprises:
LSP that directly takies and the LSP that takies indirectly, the described LSP that takies indirectly comprises by the LSP of this resource allocation process preempting resources.
Described step B also comprises:
When the bearer network Control Server is called out release and resource recycling,, then need to notify other bearer network Control Servers to carry out the Synchronous Processing of resource status if the resource after reclaiming is higher than corresponding critical value.
Described method also comprises:
The Synchronous Processing of the resource status in the subnet that the bearer network Control Server regularly or periodically carries out being responsible for separately.
Described method also comprises:
When in having the independent bearing control layer network variation of predetermined case having taken place, then the bearer network Control Server need carry out corresponding resource status Synchronous Processing with other bearer network Control Servers of described change notification.
As seen from the above technical solution provided by the invention, the present invention adopts the synchronous method of non real-time to come the isochronous resources state between the bearer network Control Server, is specially: under the also enough situation of resource, do not need the state of real-time isochronous resources; Under the situation of a certain inadequate resource, need change synchronously and resource that inadequate resource occurs only, in addition, when a certain resource transfers to more than the critical value below critical value, also carry out the Synchronous Processing of this resource, but do not need whole resource information synchronously, therefore, the synchronizing information amount is fewer.
And, among the present invention, also adopted timing or periodicity to force the resource status of phase mutually synchronization the whole network, and, when the specific situation that can cause bearer network topological structure generation great change is occurred, also carry out corresponding resource status Synchronous Processing, therefore, the present invention can take under the less situation of network overhead realize the bearer network resource synchronously.
Description of drawings
Fig. 1 is the network model schematic diagram with independent bearing control layer;
Fig. 2 is the flow chart of method of the present invention.
Embodiment
The core of method of the present invention is to adopt non real-time to upgrade the method that has changed resource status to transmit resource state information between the bearer network Control Server, and only transmit the resource information change, and no longer transmit whole resources, to reduce the amount of information of transmitting.Like this, only upgrading the resource status that changes for each bearer control layer equipment gets final product.
That is to say, the present invention is when the resource state information in having the independent bearing control layer network changes, if the measurement value that described resource state information changes meets predetermined condition, then carries out the simultaneous operation of resource status in network, otherwise, do not carry out Synchronous Processing; Described predetermined condition is specifically as follows critical value, preset time information (as blanking time etc.) and/or the predetermined change in resources amount of predetermined bearer network resource, or the like.
At first, feasibility of the present invention is analyzed:
Realization of the present invention mainly is to consider that the number of bearer network Control Server in the actual networking is fewer, networking is also simple relatively, can not bring route flapping problem the dynamic routing mechanism that resembles Internet so dynamically transmit resource information between this bearer network Control Server, and the uncontrollable problem of route or the like, thereby can not bring the uncontrollable problem of service quality yet, can satisfy QoS and reach the requirement that the carrier class level requires telecommunication service.
And, in the networking of reality is used, the quantity of bearer network Control Server is smaller really, as a rule a city only needs a bearer network Control Server, rather than resemble on metropolitan area network or the backbone network equivalent-load layer so much router is arranged, in network, have only when having a large amount of routers, dynamic routing transmittance process between each router is just understood more complicated, uncontrollable situation may appear, and the bearer network Control Server quantity in the bearer control layer is less relatively, above-mentioned uncontrollable problem should be unable to occur.
It is limited that present real-time telecommunication service kind has also been taken all factors into consideration in the realization of method of the present invention in addition, and the business model relative fixed, and the bandwidth of application has certain rules.For example, the bandwidth of a pure speech business application is approximately 16K, and one the tunnel H.323 the bandwidth of visual speech apply by letter be approximately 560K or the like.
Based on above-mentioned prerequisite, the present invention can set the critical value of the every resource of bearer network, for example, can be provided with a resource can with critical value be the service request together that its remaining bandwidth can also satisfy present maximum, the i.e. bandwidth requirement of one road visual speech communication service also can be provided with the critical value of every resource according to ratio or other way, and critical value can be an occurrence, also can be an interval value, include higher limit and lower limit.
In bearer network, the LSP (label switched path) that administers for the bearer network Control Server is provided with corresponding critical value respectively, and described each critical value can be identical, also can be different.
To the specific implementation process of the method for the invention be elaborated below, as shown in Figure 2, specifically comprise following processing procedure:
Step 21: exchange the initial resource state information of being responsible for separately in the subnet between the bearing control server mutually, comprise bandwidth and routing information, each bearer network Control Server can be set up the resource information bank of a whole network domains like this;
Can obtain the initial resource state information of whole network by this step,, be the corresponding resource of call distribution so that the access of calling out according to this information is handled;
Step 22: when calling out access, then the bearer network Control Server is called out the processing of access, is this and calls out definite corresponding path, and distribute this to call out required resource information, then, returns resource allocation result to service control layer;
When new calling inserted, the bearer network Control Server all can be carried out above-mentioned processing at every turn, and this is the processing mode of present bearer network Control Server at the calling that inserts, after the complete corresponding processing, and according to method provided by the invention, execution in step 24;
Step 24: through after the processing of step 22, according to the present invention, also need to check each the bar resources left bandwidth conditions on this dispense path, promptly check the remaining bandwidth situation on each the bar LSP that takies in this resource allocation process, judge whether described remaining bandwidth is lower than the critical value of setting, if be not lower than described critical value, then execution in step 25, otherwise, execution in step 26;
Each the bar LSP that takies in described this resource allocation process comprises that it carries out in the resource race to control process by the LSP of preempting resources, and promptly this resource allocation process LSP of causing stock number to change needs all to check whether its remaining bandwidth situation is lower than the critical value of this LSP correspondence;
When if described critical value comprises higher limit and lower limit, then this step need judge whether remaining bandwidth is lower than described lower limit, if be not lower than described lower limit, then execution in step 25, otherwise, execution in step 26;
Step 25:, then do not need to other bearer network Control Server isochronous resources state if all resource situations all do not reach critical value separately;
Step 26: if a certain resource (resource of certain bar LSP) is less through remaining bandwidth amount after the current distribution, be less than or equal the critical value of this resource, then need to synchronous this resource status of other bearer network Control Server.
Processing from step 24 to step 26 as can be seen, that the present invention only need change synchronously and resource is near the resource of critical value, do not need whole resource synchronously, therefore synchronous amount of information is fewer, and under the also enough situation of resource, the state that does not need real-time isochronous resources so the synchronous traffic is less, can not produce harmful effect to network service.
Among the present invention, the bearer network Control Server is when handling calling release each time, reclaim the resource on the path, if a certain resource through having surpassed the critical value of this resource after the current recovery, then needs to synchronous this resource status of other bearer network Control Server.Promptly need change a synchronously and resource that surpassed the critical value of this resource does not need whole resource synchronously, if this situation do not occur, does not then need the state of real-time isochronous resources, so the synchronous traffic and little.
When if described critical value comprises higher limit and lower limit, when then resource has surpassed higher limit after process reclaims specifically, need be to synchronous this resource status of other bearer network Control Server.
Among the present invention, the bearer network Control Server can be provided with regularly or periodically be responsible for separately synchronously whole resource statuss in the subnet, timing lock in time of described setting or periodically need synchronously the idle relatively time period of the system that is arranged on constantly, usually in the network system idle time period by being easier to determine at calling out quantitative statistics.
For example, the 3:00 AM clock that can be set every day carries out being responsible for separately that all resource statuss are synchronous in the subnet, at this moment, the customer call amount is very low, the load of the whole network has dropped to minimum level, and the bearer network Control Server can utilize this section load to carry out being responsible for separately that all resource statuss are synchronous in the subnet light opportunity.
Among the present invention, also be included in when predetermined variation has taken place in the bearer network, then the bearer network Control Server need carry out the corresponding synchronous processing, promptly needs described change information is notified to other bearer network Control Servers.Be specifically as follows: great changes have taken place when the topological structure of bearer network, for example, in the time of the adding of CN node or deletion or fault, cause that big change takes place the path collection in this territory, at this moment, the bearer network Control Server needs in real time this change to be synchronized in other territory.
But, when the topological structure of bearer network only has little variation, for example, when the LSP between the CN has increase, do not change if cause the path collection in this territory, at this moment, then do not need this change is synchronized to other territory in real time, such as, can be more synchronous, can certainly be synchronous in real time.
Described path collection is meant the set of the subdomain edge C N node path reachability relation between any two that the topological structure of the logical bearers net of the responsible subdomain of bearer network Control Server basis calculates automatically, and the path can reach and be meant between the CN and can directly or indirectly can reach by some LSP.For example, two edge C N can link to each other by 3 end to end LSP, and these two CN are that the path can reach so.
In sum, the present invention has realized between the bearer network Control Server adopting the synchronous method of non real-time to come the isochronous resources state, under the also enough situation of resource, does not need the state of real-time isochronous resources; Under the not enough situation of a certain resource, only need change synchronously and resource that inadequate resource occurs when a certain resource transfers to more than the critical value, is also carried out the synchronous of this resource in addition below critical value, but do not need whole resource synchronously, measure fewer synchronously;
And, at last, the present invention also adopts the operating position of periodically forcing the resource of phase mutually synchronization the whole network, and, when the specific situation that can cause the generation great change as a result of bearer network topology is occurred, also carry out the Synchronous Processing mode of corresponding resource status Synchronous Processing, therefore, the present invention can take under the less situation of network overhead realize the bearer network resource synchronously.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (12)
1. one kind has the synchronous method of realization resource status in the independent bearing control layer network, it is characterized in that, comprising:
When the resource state information in having the independent bearing control layer network changes, the employing non real-time upgrades, the measurement value that even described resource state information changes meets predetermined condition, then carries out only operating at the renewal of the described resource state information that changes in described network.
2. according to claim 1 have in the independent bearing control layer network a synchronous method of the resource status of realization, it is characterized in that described predetermined condition comprises:
Predetermined critical value, and/or preset time information, and/or predetermined change in resources amount with independent bearing control layer Internet resources.
3. have according to claim 1 and realize the synchronous method of resource status in the independent bearing control layer network, it is characterized in that described method comprises:
A, determine to have the critical value of independent bearing control layer Internet resources;
B, when to having after bearer network Control Server in the independent bearing control layer network finishes resource allocation process, surplus resources and critical value are compared, and carry out the resource status Synchronous Processing according to comparative result.
4. according to claim 3 have in the independent bearing control layer network a synchronous method of the resource status of realization, and described critical value comprises:
A concrete numerical value, perhaps, an interval value that comprises higher limit and lower limit.
5. according to claim 3 have in the independent bearing control layer network a synchronous method of the resource status of realization, it is characterized in that described steps A comprises:
Has the critical value information of independent bearing control layer Internet resources according to professional needed bandwidth resources setting with the maximum of carrying out in the independent bearing control layer network.
6. according to claim 3 have in the independent bearing control layer network a synchronous method of the resource status of realization, it is characterized in that described steps A comprises:
For each label switching path LSP is provided with corresponding critical value respectively.
7. according to claim 3 have in the independent bearing control layer network a synchronous method of the resource status of realization, it is characterized in that described method also comprises:
In having the independent bearing control layer network, carry out the exchange of initial resource state information between the bearer network Control Server, and in each bearer network Control Server, set up the resource information bank of whole network domains.
8. each describedly has in the independent bearing control layer network a synchronous method of the resource status of realization according to claim 3 to 7, it is characterized in that described step B comprises:
B1, described bearer network Control Server are after call has assigned its resource needed, to return resource allocation result to service control layer;
B2, check whether the resources left bandwidth of each LSP that takies in this resource allocation process is lower than corresponding critical value, if be lower than, the Synchronous Processing of then notifying other bearer network Control Servers to carry out resource status, otherwise, do not deal with.
9. according to claim 8 have in the independent bearing control layer network a synchronous method of the resource status of realization, it is characterized in that each LSP that takies in described this resource allocation process comprises:
LSP that directly takies and the LSP that takies indirectly, the described LSP that takies indirectly comprises by the LSP of this resource allocation process preempting resources.
10. according to claim 8 have in the independent bearing control layer network a synchronous method of the resource status of realization, it is characterized in that described step B also comprises:
When the bearer network Control Server is called out release and resource recycling,, then need to notify other bearer network Control Servers to carry out the Synchronous Processing of resource status if the resource after reclaiming is higher than corresponding critical value.
11. each describedly has in the independent bearing control layer network a synchronous method of the resource status of realization according to claim 3 to 7, it is characterized in that described method also comprises:
The Synchronous Processing of the resource status in the subnet that the bearer network Control Server regularly or periodically carries out being responsible for separately.
12. each describedly has in the independent bearing control layer network a synchronous method of the resource status of realization according to claim 3 to 7, it is characterized in that described method also comprises:
When in having the independent bearing control layer network variation of predetermined case having taken place, then the bearer network Control Server need carry out corresponding resource status Synchronous Processing with other bearer network Control Servers of described change notification.
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| CNB2005100985409A CN100413254C (en) | 2005-09-02 | 2005-09-02 | Method of implementing resource state synchronous in network with independent bearing control layer |
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| CNB2005100985409A CN100413254C (en) | 2005-09-02 | 2005-09-02 | Method of implementing resource state synchronous in network with independent bearing control layer |
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| CN100413254C true CN100413254C (en) | 2008-08-20 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1581791A (en) * | 2003-08-01 | 2005-02-16 | 华为技术有限公司 | Method for providing reliable transmission service quality in communication network |
| CN1592252A (en) * | 2003-09-02 | 2005-03-09 | 华为技术有限公司 | Automatic detecting and processing method of label exchange path condition |
| CN1599325A (en) * | 2003-09-16 | 2005-03-23 | 华为技术有限公司 | Smooth restart method of carrier control level |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1581791A (en) * | 2003-08-01 | 2005-02-16 | 华为技术有限公司 | Method for providing reliable transmission service quality in communication network |
| CN1592252A (en) * | 2003-09-02 | 2005-03-09 | 华为技术有限公司 | Automatic detecting and processing method of label exchange path condition |
| CN1599325A (en) * | 2003-09-16 | 2005-03-23 | 华为技术有限公司 | Smooth restart method of carrier control level |
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