CN100589402C - Method for QoS realization based on separable route exchanging device - Google Patents
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Abstract
This invention relates to a method for realizing QoS based on a separating route switch device including: realizing QoS control layer by a control plane in the device, in which, the QoS control layerincludes multiple QoS control modules distributed in the subsystems of the switch center and service process to become a QoS center control module and QoS edge control module, information interactionis made between the QoS control modules to finish the identity certification of users, access control, uniform management of QoS resources and application to outside.
Description
Technical field
The present invention relates to the method that service quality QoS in a kind of data communication field ensures, in particular a kind of communication field based on the implementation method of QoS in the metropolitan area/wide area network of separate type route exchange device.
Background technology
Along with developing rapidly of Internet, IP operation has also obtained quick growth and variation, service quality is had higher requirement, and (best-effort) service of doing one's best can not have been satisfied the demand of network service, and IP QoS has become the key technology of next generation network.In order to solve IP QoS problem, people have proposed intserv model and DiffServ model, for further improving service quality on existing network, have proposed bandwidth broker (BB) technology again.
IntServ/RSVP
The basic thought of IntServ/RSVP is that the mode with resource reservation provides QoS to ensure.Resource reservation carries out along the path from the source end to destination, and the information of this service is set up and preserved to each node on the path, and reserves certain resource to guarantee the service quality of this data flow for this service.
The IntServ/RSVP model can ensure for IP network provides QoS fully theoretically, but will realize the QoS of IntServ guarantees it is very difficult, and main cause is:
1) be based on owing to reserving that each data flow carries out, therefore make the state information that will keep each stream in the node, so autgmentability is very poor;
2) each node all will be safeguarded types of databases in the network, and realizes complicated functional module such as resource reservation, route, admittance control etc., has caused the great complexity and the wasting of resources thus.
DiffServ
DiffServ adopts different priority scheduling grades by to service stream classification to different data flow, finishes the differentiation of flow and treats.
The maximum characteristics of DiffServ be exactly simple effectively, autgmentability is strong.Its implementation feature is some Business Stream polymerizations that the mechanism of employing polymerization will have identical characteristics, for whole aggregated flow provides service, and no longer towards single Business Stream.
But its shortcoming is not have access control and signaling mechanism, therefore can not guarantee the service quality of each data flow, particularly when obstruction occurring.
BB(Bandwidth?Broker)
No matter be IntServ or DiffServ, all can not effectively monitor and control the resource of the whole network, some link overloads still can occur, block, and the uneven situation of other link idle causes defectives such as offered load is unbalanced, route upheaval.For this reason, bandwidth broker (Bandwidth Broker) has been proposed, just the notion of network resource manager again.Bandwidth broker is finished in the main territory (Domain) function of access control decision automatically and network equipments configuration, also is in charge of the communication between the main territory simultaneously, reaches the purpose that the QoS between cross-domain realizes by communicating by letter with the bandwidth broker of adjacent networks.
The groundwork flow process of bandwidth broker as shown in Figure 1, its key step has:
1. during initial condition, BB is recorded in network state information in the resource pool, and these network state informations comprise routing information, link-state information etc.
2. when one of a user (102) application has the data flow of certain quality of service requirement end to end, at first send resource request to BB.
3.BB after receiving request, in the residual resource pond, calculate a path that can arrive the destination and can satisfy customer requirements.
4. routing information and access control information are handed down to edge router 104.
5. a LSP (Label switching path) is set up in the control information assigned according to BB of edge router 104 in bottom-layer network, the path 114,115 as shown in Figure 1, and 116,117.
6. edge router 104 receives user 102 data, stamps grade mark according to the rule of appointment, and adds forwarding label.User 102 data flow will arrive the destination along the LSP that sets up.
7. behind this sign off, User102 sends ending request, and BB refreshes resource pool information, and notice edge router 104 deletion access control information.
BB fully combines technology such as DiffServ, MPLS, for QoS provides guarantee.But this method has increased new equipment and complicated qos signaling, has increased the complexity of network, simultaneously bandwidth broker equipment B B how efficient real time the monitoring network resource, respond user QoS application fast, still do not have effective technical means at present and solve.
In sum, current QoS mechanism mainly is present in datum plane, and intserv model brings bigger burden can for the network core node, is unfavorable for expansion; Though DiffServ pattern autgmentability is relatively good, lack unified distribution to the whole network resource, when DiffServ flows when a lot, still can not really guarantee the QoS that flows, for operation brings difficulty.The bandwidth broker pattern of developing has the advantage of automatic access control and allocation of network resources, but extra increase a set of equipment, and how real-time supervision and network resource administration, feedback user QoS application in time also is the problem that needs solve.From in essence, more than three kinds of QOS mechanism all be based on existing MESH network configuration, one flows to toward will just arriving at the destination through multi-hop, time-delay that this wherein brings and shake are unfavorable for that all QoS realizes end to end.
Therefore, there is defective in prior art, and awaits improving and development.
Summary of the invention
The object of the present invention is to provide a kind of method that realizes based on the QoS of separate type route exchange device, shortcoming at above-mentioned prior art, based on the separate type route exchange device, by change to traditional route exchange device form and network configuration, fundamentally change the network context of QoS problem, the QoS implementation is proposed on this basis, the QoS problem of implementation of metropolitan area/wide area network is simplified to the problem that realizes QoS in the route exchange device, thereby overcome the shortcoming that realizes QoS method complexity in the prior art, improve service quality end to end.
Technical scheme of the present invention is as follows:
A kind of method that realizes based on the QoS of separate type route exchange device, described separate type route exchange device comprises center switching subsystem, service process subsystem, interface subsystem,
Described center switching subsystem comprises data exchange module and center switching control module, and described data exchange module is finished message data transmitting-receiving and linear speed exchange; Described center switching control module is finished various exchange message controls, system management, resource management;
Described service process subsystem comprises data processing module and Business Processing control module, described data processing module is finished the message access control, message is handled, exchanged controlled function, and described Business Processing control module is finished this management subsystem, protocol processes and assistance and finished system-wide service resource management;
Described interface subsystem is finished the access of message data;
Described method also comprises:
Utilize the control plane in the separate type route exchange device to realize the Qos key-course, described QoS key-course comprises a plurality of QoS control modules, described QoS control module is distributed in described center switching subsystem and the described service process subsystem, is called QoS Central Control Module and QoS edge control module; Between the described QoS control module information interaction is arranged, be used to finish the unified management of user's authentication, access control, Qos resource, to outside application resource.
Described method, wherein, described method also comprises a policy enforcement function body is set, it has the ability that QoS resource control strategy is carried out, carry out by described QoS Central Control Module and QoS edge control module, requirement of resource control strategy or the policy calculation result of self according to the upper strata in conjunction with network resource status, finish access control function jointly.
Described method, wherein, described method is finished authenticating user identification by described QoS edge control module, assists described QoS Central Control Module to finish access control, configuration/establishment data processing policy in described service process subsystem; Finish user's access control by described QoS Central Control Module, the unified management of QoS resource, and to external network log on resource.
Described method, wherein, described method can finish user's authentication, access control by described QoS edge control module, in service process subsystem configuration/establishment data processing policy, described QoS Central Control Module is finished the unified management of resource, to external network log on resource.
Described method, wherein, described method by described QoS Central Control Module finish the unified management of user's authentication, access control, QoS resource, to external network log on resource; By described QoS edge control module at service process subsystem configuration/establishment data processing policy.
Described method, wherein, described method is further comprising the steps of:
A1) user initiates the QoS application;
A2) identity to the user authenticates and access control;
A3) generate the user data strategy;
A4) service ending is handled.
Described method, wherein, described method also comprises the following steps when the QoS of the dialogue-based mode in same metropolitan area/wide area network does not realize:
A5) external network resource bid, if be checked through the targeted customer not in native system, described QoS Central Control Module then on the qos parameter basis of user applies, produces a new QoS application, to external network application resource reservation; When native system adopts the RSVP/RSVP-TE signaling method to carry out access control, then can be by the QoS edge control module that exports to external network application resource reservation; Whether external network returns success information.
A kind of method that realizes based on the QoS of separate type route exchange device that the inventive method provided, realize comparing with the QoS of existing Mesh network configuration, QoS problem of implementation in the metropolitan area/wide area network is simplified to the problem of implementation of QoS in the route switching system, reduced time-delay and the shake of data in transmission course, sound assurance the service quality of data flow; Compare with existing IntServ/RSVP model, simplified resource reservation, the access control operation of IntServ/RSVP complexity, operations such as the present invention only need simply inquire about in resource table, shielding can be finished resource reservation; Compare with existing DiffServ model, have uniform resource management, effectively access control, can be each user provides absolute QoS to ensure; (BB) compares with bandwidth broker, saved BB for realize one end to end service quality high speed routing calculating, the path of carrying out set up and complex steps such as resource continual renovation, save the settling time of telex network, saved BB equipment, improved service quality end to end.
Description of drawings
In the accompanying drawing,
Fig. 1 is the groundwork schematic flow sheet of the bandwidth broker BB of prior art;
Fig. 2 is the structure chart of the separate type route exchange device in the method that realizes of described QoS based on the separate type route exchange device of the present invention;
Fig. 3 uses the separate type route exchange device for the inventive method sets up metropolitan area/wide area network schematic diagram;
Fig. 4 is the QoS implementation schematic diagram of the inventive method;
Fig. 5 is the schematic flow sheet of dialogue-based mode in the inventive method.
Embodiment
Below in conjunction with accompanying drawing, will be described in detail preferred embodiment of the present invention.
The method that realizes based on the QoS of separate type route exchange device of the present invention, the QoS implementation method that is based on the metropolitan area/wide area network of separate type route exchange device establishment and proposes, the separate type route exchange device is made up of center switching subsystem, service process subsystem, interface subsystem as shown in Figure 2.Described center switching subsystem comprises two main functional modules: data exchange module and center switching control module.Described data exchange module is finished message data transmitting-receiving and linear speed exchange; Described center switching control module is finished functions such as various exchange message controls, system management, resource management.Described service process subsystem comprises two main functional modules: data processing module and Business Processing control module.Described data processing module is mainly finished the message access control, functions such as control are handled, exchanged to message.Described Business Processing control module is finished this management subsystem, protocol processes and assistance and is finished functions such as system-wide service resource management.Described interface subsystem is mainly finished the access of message data.
Be illustrated in figure 3 as and use the schematic diagram that the separate type route exchange device is set up metropolitan area/wide area network, the basic framework of same jumbo route exchange device of whole group data exchange system is similar.Described interface subsystem and described service process subsystem are placed on network edge, and be interconnected by transmission equipments such as optical fiber and described center switching subsystem.
Main thought of the present invention is to be realized the service quality of data flow in metropolitan area/wide area network shown in Figure 3 by the QoS key-course, utilizes the function of the control plane realization Qos key-course in the separate type route exchange device.As shown in Figure 4, the QoS key-course is made up of a plurality of QoS control modules.The QoS control module is distributed in center switching subsystem and the service process subsystem, is called QoS Central Control Module and QoS edge control module.Between the QoS control module information interaction is arranged.The QoS key-course mainly finishes the unified management of user's authentication, access control, Qos resource, to outside application resource.The ability that QoS Central Control Module and QoS edge control module can also have QoS resource control strategy to carry out, promptly has a policy enforcement function body, requirement of resource control strategy or the policy calculation result of self according to the upper strata in conjunction with network resource status, finish access control function jointly.
For realizing that QoS ensures, can finish authenticating user identification by QOS edge control module, assist the QoS Central Control Module to finish access control, configuration/establishment in service process subsystem " data processing policy ".Finish user's access control by the QoS Central Control Module, the unified management of QoS resource is to external network log on resource.
Also can be finished user's authentication, access control, configuration/establishment in service process subsystem " data processing policy " by QoS edge control module, the QoS Central Control Module is finished the unified management of resource, to external network log on resource etc.
Also can finish the unified management of user's authentication, access control, QoS resource by the QoS Central Control Module, to external network log on resource.By QoS edge control module at service process subsystem configuration/establishment " data processing policy ".
According to QoS implementation difference, the QoS that can be divided into dialogue-based formula realizes and realizes based on nonconversational QoS, describes the embodiment of QoS below respectively by this dual mode.
Based on the QoS implementation of non-conversational mode, referring to Fig. 4:
1, QoS edge control module is according to the communication strategy between user and the router, for inhomogeneity user such as speech, video user are created different " data processing policy ".
2, customer traffic enters service process subsystem, and data processing module to different data flow, is stamped grade mark according to " data processing policy ", adopts different classifications to handle.
The QoS implementation of dialogue-based mode:
The QoS implementation of dialogue-based mode can be divided into two kinds again, a kind of be source end subscriber and destination end user all in same metropolitan area/wide area network, another kind is that source end subscriber and destination end user be not in same metropolitan area/wide area network.
QoS implementations of the dialogue-based mode in same metropolitan area/wide area network all:
1, the user initiates the QoS application.User's Qos application is given service process subsystem after being handled by interface subsystem, is given to QoS edge control module;
2, user's authentication.QoS edge control module judges according to the communication strategy between user and the router whether this user has authority to carry out the QoS application.User's authentication also can be carried out at the QoS Central Control Module, and QoS edge control module is given to Central Control Module with user's QoS application, according to communication strategy, judges whether the user has authority to carry out the QoS application by the QoS Central Control Module.
3, user's access control.When source end subscriber and destination end user all in same service process subsystem and exchanges data can be under the condition that service process subsystem is finished, can judge locally whether have enough resources to satisfy user's resource request by QoS edge control module.Resource when QoS edge control module also has the control strategy executive capability, again according to control strategy, judges whether to allow the user to insert after satisfying.If allow to insert, then finish access control, revise the resource form.When if above-mentioned steps has one not satisfy, then refusing user's application.When the exchange of source end subscriber and destination end user's data needs by the center switching subsystem, can finish access control by following 3 kinds of methods:
(1) be that the user finishes access control by the QoS Central Control Module.The QoS Central Control Module is safeguarded a QoS resource form, the resource situation of data processing module in data exchange module and each service sub-system in the records center switching subsystem.The QoS Central Control Module is inquired about this QoS resource form, judges whether that enough resources satisfy user's application.If can satisfy user's resource requirement, when the QoS Central Control Module also has the control strategy executive capability,, judge whether to allow the user to insert again according to control strategy.If allow to insert, then finish access control, then revise QoS resource form, otherwise above-mentioned steps is when having one not satisfy, then refusing user's application.
(2) user's access control also can be finished jointly by QoS Central Control Module and QoS edge control module.QoS Central Control Module in the switching subsystem of center is safeguarded a QoS resource form, the resource situation of data exchange module in the records center switching subsystem; QoS edge control module in each service process subsystem is safeguarded a QoS resource form, the resource situation of data processing module in the service sub-system of record own.Whether the QoS edge control module in the service process subsystem of QoS Central Control Module query source rapids and destination end, the data processing module of inquiry source end and destination end have enough resources to allow to insert; Whether Help Center's switching subsystem has enough resources to allow to insert simultaneously.If both resources can satisfy user's requirement, when the QoS Central Control Module also has the control strategy executive capability,, judge whether to allow the user to insert again according to control strategy.If allow to insert, then finish access control, revise QoS resource form.Otherwise when above-mentioned steps has one not satisfy, then refusing user's application.
(3) user's access control can also realize by similar RSVP/RSVP-TE means of signaling.The QoS edge control module of source end position to the user carry out authentication intact after, send the resource reservation signaling.If Reserve message returns success, then insert successfully, otherwise the refusing user's application.
4, generate " data processing policy ".After end QoS edge, source control module obtains the message of " inserting successfully ", create this user " data processing policy ", and notify the user " to insert successfully ".The data processing module of service process subsystem carries out classification to user's data and handles according to " data processing policy ".
5, service ending is handled.This service ending, QoS edge control module is deleted " data processing policy " of this user's correspondence, and QoS Central Control Module/QoS edge control module is recovered the resource that this user uses in the resource form.
The QoS implementation of the dialogue-based mode in same metropolitan area/wide area network not:
1, the user initiates the QoS application.
2, user's authentication and access control.With the user is the same in same territory end to end, all to carry out the authentication of native system and the related resource access control of native system.
3, external network resource bid.Be checked through the targeted customer not in native system, the QoS Central Control Module then on the qos parameter basis of user applies, produces a new QoS application, to external network application resource reservation.When native system adopts the RSVP/RSVP-TE signaling method to carry out access control, then can be by the QOS edge control module that exports to external network application resource reservation.Whether external network returns success information.
4, generate the user data strategy.
5, service ending is handled.
Non-conversational service of the present invention and conversational service can coexist as in the system, when the situation of resource contention appears in two business, carry out policy calculation by the policy enforcement function in the QoS control module according to the control strategy of setting, with the resource distribution of non-conversational service of equilibrium and conversational service.
The flow chart of the inventive method as shown in Figure 5, below conversation-based QoS implementation is that example is described in detail in the cross-domain metropolitan area network to not existing.System is made up of the network user and separate type route switching system.
1. the user proposes the QoS application, is converted to corresponding resource request by business device in the interface subsystem such as soft switch according to type of service, as different resource request such as voice, video, data.Be uploaded to service process subsystem then, described service process subsystem is transmitted to QoS edge control module and handles.
2.QoS the edge control module is proved user identity, judges whether the user has authority to carry out resource bid, does not then finish, and has then the user applies parameter is passed to the QoS Central Control Module.
3.QoS Central Control Module inserts judgement to user applies.The QoS Central Control Module is safeguarded a QoS resource form, has write down residue exchange resource in the switching subsystem of center and the data processing surplus resources (ability) in each service process subsystem.The QoS Central Control Module is inquired about this resource form, judges whether center switching subsystem, source end service sub-system, destination end service sub-system have resource to satisfy the user resources request.If resource satisfies, judged whether to allow to insert according to the control strategy of setting again.If allow to insert, then complete successfully access control.Otherwise the refusing user's application, process ends.
4.QoS Central Control Module is revised the resource form.In the resource form, shield the resource that this user uses.
5.QoS the QoS edge control module of Central Control Module notification source rapids inserts successfully.QoS edge control module is created one " data processing policy ", such as dynamic SLA according to user's resource request information.
6.QoS the edge control module notifies the user to insert success.The user begins communication, and service process subsystem measures (metering), mark (marking), shaping (sharping), abandons operations such as (dropping) user's data stream according to " data processing policy ".
7. telex network finishes, and sends and finishes application.
After 8.QoS key-course is received ending request, " data processing policy, the resource of QoS Central Control Module recovery shielding that control module deletion in QoS edge is corresponding.
Adopt the method for the invention, realize comparing with the QoS of existing Mesh network configuration, QoS problem of implementation in the metropolitan area/wide area network is simplified to the problem of implementation of QoS in the route switching system, reduced time-delay and the shake of data in transmission course, sound assurance the service quality of data flow.
The method of the invention is compared with existing IntServ/RSVP model, has simplified resource reservation, the access control operation of IntServ/RSVP complexity, and operations such as the present invention only need simply inquire about in resource table, shielding can be finished resource reservation.
The method of the invention is compared with existing DiffServ model, has uniform resource management, effectively access control, and can be each user provides absolute QoS to ensure.
Method of the present invention is compared with the bandwidth broker (BB) in the research, saved BB for realize one end to end service quality high speed routing calculating, the path of carrying out set up and complex steps such as resource continual renovation, saved the settling time of telex network, save BB equipment, improved service quality end to end.
Should be understood that foregoing description of the present invention is at specific embodiment, is not the whole of claim and to the restriction of claim, and scope of patent protection of the present invention should be as the criterion with claims.
Claims (10)
1, a kind of method that realizes based on the QoS of separate type route exchange device is characterized in that described separate type route exchange device comprises center switching subsystem, service process subsystem, interface subsystem, and described method comprises the steps:
1) user initiates the QoS application to interface subsystem, and interface subsystem is handled the back and sent it to the QoS control module by service process subsystem;
2) described QoS control module authenticates user's identity, if the user does not have authority then finishes, if authenticate legally, then changes step 3) over to;
3) described QoS control module judges whether center switching subsystem and service process subsystem or service process subsystem have the resource bid of satisfying resource user, if having, then finish user access control, change step 4) over to;
4) described QoS control module generates the user data processing policy, and described service process subsystem carries out classification to user's data and handles according to the user data processing policy;
5) ending request sent according to the user of described QoS control module is carried out service ending and is handled;
Wherein, described QoS control module comprises QoS Central Control Module and QoS edge control module, described QoS Central Control Module and QoS edge control module are distributed in respectively in described center switching subsystem, the described service process subsystem, are used for user's access control.
2, method according to claim 1 is characterized in that, described QoS Central Control Module and QoS edge control module also be used to finish the unified management of user's authentication, QoS resource, to outside application resource.
3, method according to claim 2, it is characterized in that send it to described QoS control module by service process subsystem after described interface subsystem is handled and further comprise: interface subsystem is handled the back and sent it to described QoS edge control module by service process subsystem; Described step 2) further comprise: described QoS edge control module authenticates user's identity.
4, method according to claim 3 is characterized in that, described step 3) further comprises:
Whether the described QoS Central Control Module described QoS edge control module in described service process subsystem and the QoS Central Control Module in the switching subsystem of described center inquiry data processing module and data exchange module respectively has resource to satisfy user's resource bid;
If have, then judge whether to allow the user to insert, if allow to insert, then finish access control, revise the resource form.
5, method according to claim 3 is characterized in that, described step 3) further comprises:
Described QoS edge control module judges whether this locality has resource to satisfy user's resource bid;
If have, then judge whether to allow the user to insert, if allow to insert, then finish access control, revise the resource form.
6, method according to claim 3 is characterized in that, described step 3) further comprises: described QoS edge control module is sent the resource reservation signaling, if return the reservation success message, then finishes access control.
7, method according to claim 6 is characterized in that, described method also comprised when the QoS of the dialogue-based mode in same metropolitan area/wide area network did not realize:
Described QoS edge control module is to external network application resource reservation, and this step is carried out before the described step 4) after described step 3).
8, method according to claim 3 is characterized in that, comprises that also described QoS edge control module issues described QoS Central Control Module with this QoS application; Described step 2) further comprise: described QoS Central Control Module authenticates user's identity.
9, method according to claim 8 is characterized in that, described step 3) further comprises:
Described QoS Central Control Module judges whether the data exchange module of described center switching subsystem and the data processing module of service process subsystem have resource to satisfy user's resource bid;
If have, then described QoS Central Control Module judges whether to allow the user to insert, if allow to insert, then finishes access control, revises the resource form.
10, according to the described method of arbitrary claim among claim 2-5, the 8-9, it is characterized in that described method also was included in and carries out following steps after the described step 3) before the described step 4) when the QoS of the dialogue-based mode in same metropolitan area/wide area network did not realize:
If be checked through the targeted customer not in native system, described QoS Central Control Module then on the qos parameter basis of user applies, produces a new QoS application, to external network application resource reservation.
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| US7676522B2 (en) * | 2007-04-20 | 2010-03-09 | Sap Ag | Method and system for including data quality in data streams |
| EP2173067A4 (en) | 2007-07-27 | 2017-06-21 | Hangzhou H3C Technologies Co., Ltd. | A message processing apparatus and the method thereof |
| CN102571537A (en) * | 2010-12-22 | 2012-07-11 | 中兴通讯股份有限公司 | Priority inheritance method and system for QoS (Quality of Service) in identifier network |
| CN103117953B (en) * | 2013-01-31 | 2016-12-28 | 杭州华三通信技术有限公司 | A kind of QoS collocation method and equipment |
| CN106303749A (en) * | 2016-08-30 | 2017-01-04 | 武汉全乐科技有限公司 | A kind of RTMP video broadcasting method based on RSVP TE |
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