CN100450084C - Method for raising call requiring on ratio of virtual exchange system - Google Patents
Method for raising call requiring on ratio of virtual exchange system Download PDFInfo
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- CN100450084C CN100450084C CNB2005100861035A CN200510086103A CN100450084C CN 100450084 C CN100450084 C CN 100450084C CN B2005100861035 A CNB2005100861035 A CN B2005100861035A CN 200510086103 A CN200510086103 A CN 200510086103A CN 100450084 C CN100450084 C CN 100450084C
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Abstract
The present invention relates to a method for improving the switching-on rate of a call request of a virtual exchange system, which belongs to the technical field of network communication. The method provides a route backspace mechanism. After a previous hop VSC receives a failure message of a resource request of a next hop VSC, other available equivalent routes are selected again, and the resource request continues to be executed. Therefore, the successful rate of call requests is improved. In the present invention, the successful rate of call requests is improved, the running stability of a network is enhanced, and the method is simple to realize. The method is particularly suitable for various kinds of urgent service, and the switching-on rate of call service is improved to a maximum extent.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to a kind of method that improves virtual exchange system call request call completing rate.
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.A large amount of bandwidth because multimedia service has accounted for, the key business that existing network will be guaranteed just is difficult to be transmitted reliably.So various QoS (service quality) technology is arisen at the historic moment.Based on the multiple application and service and the broadband multimedia services of door, be included as the online game that the ordinary residence user provides abundant Video (video)/Audio (audio frequency) stream, VOD (video request program), video multicast, multimedia interactive, high bandwidth requirements; For the business user provides video conference, long-distance education, VPN (Virtual Private Network), has the Leased line of QoS guarantee etc., become the important content of broadband operation.
At these business users, the VPN/VPDN special line scheme of V-Switch (empty exchange), L2TP (Layer 2 Tunneling Protocol), MPLS multiple modes such as (multiprotocol label switching) has been proposed.Wherein the V-Switch technology is mainly used in and sets up stable, practical, economic operation level Metro Ethernet; can realize functions such as QoS assurance, network security protection, carrier-class network operation and management; possess the user management based on number, certain mobility, the core business managerial abilities such as centralized management of professional open management charging; provide to comprise professional and service such as intelligent two laminar flow amounts scheduling, LAN special line, the planning of IP flow, the present deficiency of network on pure two layers of ability filled up in its appearance.
Be illustrated in figure 1 as V-Switch networking schematic diagram, the V-Switch system is divided into three layers: the V-Switch service control layer, V-Switch connects key-course, V-Switch bearing capacity layer.Service control layer is finished professional control and registration of V-Switch special line or the like; Connect key-course and be used for safeguarding DRE (Data Relay Entity) exchange resource, comprise equipment, interface, link, VLAN (VLAN), the V-Switch of key-course SCR (professional control registration) of accepting business sets up request, for connecting, this V-Switch selects service flow path, distribute bandwidth and VLAN (VLAN) resource, and control information is issued on the DRE equipment of Business Stream process, VSC (empty exchange control unit) is positioned at the connection key-course, and can pass through the RCIP protocol interface between service control layer and other VSC, and can pass through the COPS+ protocol interface between the logical bearers net.
The V-Switch system is different from traditional MPLS technology, the notion of inlet port VLAN, adopt the VLAN exchange, networking is simple and practical, and the V-Switch system has proposed the notion of signaling flow and data flow layering, adopt distributed mechanism, use independently explorer, the resource on the DRE is managed and distributes, make the load bearing equipment function clearer and more definite, realize simply being convenient to management.
The distributed realization technology of V-Switch:
1, professional control registration: the user is engaged in registering in the enterprising industry of SCR by dynamic or static mode according to actual needs; SCR has write down user data, comprises physical location, authority, charging authentication, interface capability information etc., notifies SCR or initiatively carry out associative operations such as resource bid, modification, release to VSC by SCR when customer call.
2, V-Switch controller: exchange resource in the maintaining network, comprise equipment, interface, link, VLAN, select operations such as service path, distribution VLAN resource, recovery resource for Business Stream, sequence of operations such as the required resource bid of carrying out of user, release, modification all need to be issued on the DRE equipment by explorer.VSC bears functions such as the establishment of connection of VLAN exchange end to end, maintenance, dismounting, CDR generation as the connection key-course in the intelligent virtual exchange system structure, is the control nerve of V-Switch system.
3, DRE: the responsible resource control information that issues according to VSC, carry out the forwarding of actual Ethernet service stream, the change in resources information of this equipment need be reported VSC equipment.
The distributed implementation method of V-Switch:
Initiations such as all resource request, release, modification, all be to begin, customer service is controlled, initiate request to VSC by SCR, VSC carries out routing and Resources allocation, and the resource information that will apply for is flowed mapping to each DRE equipment of jumping process issues.
DRE carries out actual Ethernet service circulation and sends out according to the resource information that issues.Signaling process is to set up once two-way resource bid, and protocol conversation is set up.Be illustrated in figure 2 as typically set up one from user 1 to the user flow chart of 2 V-Switch special line, suppose this special line through DRE1, DRE2, DRE4, DRE5, DRE6, this resource request process comprises following operation:
Setting up each equipment room agreement according to the networking needs connects;
The user at first carries out information registration and validity checking at SCR;
The user is to the SCR request of making a call;
SCR initiates resource request Req to VSC1, and caller information comprises rear subscriber number, called number, bandwidth etc., and when a VSC is not enough to finish this professional resource request, VSC1 will jump VSC2 to next and initiate corresponding resource request;
VSC2 receives resource request message, according to user request information and routing iinformation, when bearer network can satisfy the bandwidth requirement of this resource request, VSC will keep enough bandwidth for this business to the passage of this business process, and respectively export VLAN ID and ingress VLAN ID for it distributes, and stream information that should business, VLAN ID exchange message, bandwidth information etc. are handed down to DRE5, DRE6 on the path;
After DRE5, DRE6 receive stream mapping installation message, need beam back the stream mapping to VSC2 response is installed, whether run succeeded with report;
After VSC2 receives the response of DRE5, DRE6 and runs succeeded, upwards one jump VSC1 and beam back the resource request response;
VSC1 receives the resource request response of VSC2, to VSC1 DRE1, DRE2, the DRE4 equipment of process issue stream mapping installation message;
DRE1, DRE2, DRE4 equipment return execution result to VSC1;
VSC1 receives the successful installation response, beams back the resource request success response to SCR, and like this, the first resource request has been finished; If the user is not in the management domain of this VSC, VSC can enable agent functionality, this resource request is jumped VSC to next transmit, can be by the collaborative first resource application process of finishing of a plurality of VSC.
By description to a call flow, as can be seen, the shortcoming that existing V-Switch system exists is: when the call request of setting up Signaling Layer, when if next jumping VSC or follow-up VSC return the resource request failure, to directly cause this time request failure, can cause service disconnection like this, and reduce the reliability of private line service.
Therefore, need provide a kind of method when next jumping VSC returns the resource request failure response, can reselect route and continue the service request operation.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the object of the present invention is to provide a kind of method that improves virtual exchange system call request call completing rate, this method proposes a kind of route fallback mechanism, after a last jumping VSC receives next jumping VSC resource request failure, reselect other available equivalents routes, proceed resource request, improved the call request success rate.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of method that improves virtual exchange system call request call completing rate, after the empty exchange control unit VSC of a jumping receives next jumping VSC resource request failure response on the connection key-course, next jumps the route of VSC rollback, and reselects other available equivalents route and Resources allocation.
Described other available equivalents routing procedures of reselecting specifically comprise:
A, guarantee that next route of jumping before VSC is constant, reselect the route of the route equivalence of other and described rollback.
Described other available equivalents routing procedures of reselecting specifically comprise:
B, described last one jumps VSC and reselects the whole piece route.
Described method also comprises:
When next jumps the route of VSC at rollback, on the route of rollback, set a mark.
Described method also comprises:
Preestablish each VSC and once ask route rollback number of times.
Described method also comprises:
After a described last jumping VSC reselects other available equivalents routes and Resources allocation success, continue the resource request operation, jump VSC transmission resource request to next, up to purpose VSC resource allocation success.
Described method also comprises:
After the purpose VSC resource allocation success, the stream mapping directive is handed down to the Data Relay Entity DRE in this territory.
Described stream mapping directive comprises:
Session id, stream information, qos parameter, flow descriptor, and the ingress interface name of this DRE, the ID, discharge coupling name of inlet virtual LAN VLAN, the ID of outlet VLAN.
Described method also comprises:
Stream shines upon a successfully upwards jumping VSC transmission resource request response of back, and jumps VSC by last one and will flow the DRE that mapping directive is handed down to this territory, sends to source VSC successively, and source VSC registers SCR to business control again and returns the resource request response message.
As seen from the above technical solution provided by the invention, the present invention has realized after a last jumping VSC receives next jumping VSC resource request failure, reselect other available equivalents routes, proceed resource request, improved the call request success rate, strengthened the stability of the network operation, and implemented simple, be more suitable for handling various urgency traffics, improved the call completing rate of call business to the full extent.
Description of drawings
Fig. 1 is a prior art V-Switch networking schematic diagram;
Fig. 2 sets up the flow chart of V-Switch special line for prior art;
Fig. 3 is a route rollback schematic diagram of the present invention;
Fig. 4 is route rollback operation flow chart in the virtual exchange system of the present invention.
Embodiment
Core concept of the present invention is to utilize a kind of route fallback mechanism to improve the call request call completing rate, after a last jumping VSC receives next jumping VSC resource request failure, jump VSC by last one and reselect other available equivalents routes, proceed resource request.
The invention provides a kind of method that improves virtual exchange system call request call completing rate, be illustrated in figure 3 as route rollback schematic diagram of the present invention, Fig. 4 is route rollback operation flow chart in the virtual exchange system of the present invention, below with reference to Fig. 3 and Fig. 4 route back off procedure of the present invention is described, this V-Switch system comprises service control layer, connects key-course and bearing capacity layer, be convenient narration, these three layers representative entity title are respectively SCR, VSC, DRE.The route backing method specifically comprises following operation in this virtual exchange system:
Step 10: connect key-course VSC and receive resource request information, select route and Resources allocation by source VSC, if the called subscriber not in the management domain of VSC place, source, promptly during the non-source VSC of purpose VSC, source VSC jumps VSC to next and initiates corresponding resource request;
The user is at first by mutual with SCR, the information of carrying out registration and validity checking, the request of making a call, send resource request by SCR to the VSC that connects key-course again, source VSC is according to source IP address and the purpose IP address choice route and the Resources allocation of this request, if the called subscriber is not in the management domain of VSC place, source, then source VSC jumps VSC to next and initiates corresponding resource request, initiate corresponding resource request as the VSC1 among Fig. 3 to VSC2, equally, if during the non-VSC2 of purpose VSC, this VSC2 jumps VSC to next again and initiates corresponding resource request, up to purpose VSC;
Step 11: next jumps VSC according to user resources solicited message and routing iinformation Resources allocation, jumps VSC if the resource allocation failure is sent to last one with the resource allocation failure response;
With reference to Fig. 3, suppose to handle the call request of UE1 to UE2, after if VSC1 receives the resource request of SCR in the above-mentioned steps, select DRE1, DRE2, DRE3, DRE6, and the DRE7 of VSC2, and to VSC2 initiation resource request, VSC2 is according to user resources solicited message and routing iinformation Resources allocation, if resource allocation success, jump VSC4 according to routing iinformation to next and send corresponding resource request, if next jumps the failure of VSC4 resource request, then reclaim the pre-assigned resource in this territory, and this resource request failure response is sent to VSC2;
Step 12: after a last jumping VSC receives the resource request failure response, carry out the route rollback;
When causing next to jump the failure of VSC resource request for a certain reason, a next jumping VSC upwards jumping VSC returns the resource request failure response, after as above the VSC2 in the example receives the resource request failure response of VSC4, carry out the route rollback, i.e. the route of next jumping VSC4 of rollback;
Step 13: jump VSC by last one and search other available equivalent routes according to the user resources solicited message;
As above in the example, VSC1 can be DRE6+DRE7+DRE9+DRE11+DRE12, DRE6+DRE7+DRE10+DRE11+DRE12, DRE6+DRE8+DRE10+DRE11+DRE12, DRE6+DRE8+DRE9+DRE11+DRE12, DRE6+DRE12 etc. to other available routes of VSC4, this is reselected routing procedure and guarantees that at first next route of jumping before VSC is constant, reselects the route with the route equivalence of above-mentioned rollback; If select then can reselect the whole piece route under the constant situation of next route before jumping VSC guaranteeing by this current VSC less than route suitable and route equivalence above-mentioned rollback; In the route rollback, on the route of rollback, set a mark, make by the route of rollback and only allow rollback once; Equally, if current VSC resource uses up, perhaps other reasons causes routing unsuccessful, then current VSC continues upwards one to jump VSC transmission resource request failure response, repeating step 12, if source VSC is also because resource has used up or other reasons causes routing unsuccessful, source VSC will report SCR, carry session id and reason code in the message, for avoiding undying route rollback to influence the speed of call request, can preestablish each VSC and once ask route rollback number of times, as set a VSC management domain and only allow once to ask the route rollback 3 times;
Step 14:VSC jumps VSC to next and sends resource request, repeating step 11 after reselecting route and Resources allocation success;
VSC reselects route and Resources allocation is finished, jump VSC to next and send resource request, next is jumped and continues down request, the rest may be inferred, up to purpose VSC resource allocation success, purpose VSC will flow the DRE that mapping directive is handed down to this territory, comprise session id, stream information, qos parameter, the flow descriptor, and the ingress interface name of this DRE, the ID of ingress VLAN, the discharge coupling name, the ID of outlet VLAN, stream shines upon a successfully upwards jumping VSC transmission resource request response of back, and jump VSC by last one and will flow the DRE that mapping directive is handed down to this territory, sending to source VSC successively, source VSC returns the resource request response message to SCR again.
In sum, the present invention has realized carrying out the route rollback when next jumps the resource request failure by route rollback technology, jumps VSC by last one and reselects route and carry out resource allocation, has improved the call flow call completing rate, has strengthened the stability of the network operation.
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 (9)
1, a kind of method that improves virtual exchange system call request call completing rate, it is characterized in that, after the empty exchange control unit VSC of a jumping received next jumping VSC resource request failure response on the connection key-course, next jumped the route of VSC rollback, and reselects other available equivalents route and Resources allocation.
2, a kind of method that improves virtual exchange system call request call completing rate as claimed in claim 1 is characterized in that, described other available equivalents routing procedures of reselecting specifically comprise:
A, guarantee that next route of jumping before VSC is constant, reselect the route of the route equivalence of other and described rollback.
3, a kind of method that improves virtual exchange system call request call completing rate as claimed in claim 1 is characterized in that, described other available equivalents routing procedures of reselecting specifically comprise:
B, described last one jumps VSC and reselects the whole piece route.
4, a kind of method that improves virtual exchange system call request call completing rate as claimed in claim 1 is characterized in that described method also comprises:
When next jumps the route of VSC at rollback, on the route of rollback, set a mark.
5, a kind of method that improves virtual exchange system call request call completing rate as claimed in claim 1 is characterized in that described method also comprises:
Preestablish each VSC and once ask route rollback number of times.
6, a kind of method that improves virtual exchange system call request call completing rate as claimed in claim 1 is characterized in that described method also comprises:
After a described last jumping VSC reselects other available equivalents routes and Resources allocation success, continue the resource request operation, jump VSC transmission resource request to next, up to purpose VSC resource allocation success.
7, a kind of method that improves virtual exchange system call request call completing rate as claimed in claim 6 is characterized in that described method also comprises:
After the purpose VSC resource allocation success, the stream mapping directive is handed down to the Data Relay Entity DRE in this territory.
8, a kind of method that improves virtual exchange system call request call completing rate as claimed in claim 7 is characterized in that, described stream mapping directive comprises:
Session id, stream information, qos parameter, flow descriptor, and the ingress interface name of this DRE, the ID, discharge coupling name of inlet virtual LAN VLAN, the ID of outlet VLAN.
9, as claim 7 or 8 described a kind of methods that improve virtual exchange system call request call completing rate, it is characterized in that described method also comprises:
Stream shines upon a successfully upwards jumping VSC transmission resource request response of back, and jumps VSC by last one and will flow the DRE that mapping directive is handed down to this territory, sends to source VSC successively, and source VSC registers SCR to business control again and returns the resource request response message.
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| CNB2005100861035A CN100450084C (en) | 2005-07-15 | 2005-07-15 | Method for raising call requiring on ratio of virtual exchange system |
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| CNB2005100861035A CN100450084C (en) | 2005-07-15 | 2005-07-15 | Method for raising call requiring on ratio of virtual exchange system |
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| CN1870579A CN1870579A (en) | 2006-11-29 |
| CN100450084C true CN100450084C (en) | 2009-01-07 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040032837A1 (en) * | 2002-07-31 | 2004-02-19 | Visser Lance A. | Configuration rollback |
| CN1482773A (en) * | 2003-04-11 | 2004-03-17 | 清华紫光比威网络技术有限公司 | Method for implementing fault tolerant transmission control protocol |
| CN1501606A (en) * | 2002-11-18 | 2004-06-02 | 华为技术有限公司 | A method for implementing service rollback |
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- 2005-07-15 CN CNB2005100861035A patent/CN100450084C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040032837A1 (en) * | 2002-07-31 | 2004-02-19 | Visser Lance A. | Configuration rollback |
| CN1501606A (en) * | 2002-11-18 | 2004-06-02 | 华为技术有限公司 | A method for implementing service rollback |
| CN1482773A (en) * | 2003-04-11 | 2004-03-17 | 清华紫光比威网络技术有限公司 | Method for implementing fault tolerant transmission control protocol |
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| CN1870579A (en) | 2006-11-29 |
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