CN102143084B - Tiered service aggregation model under open network environment - Google Patents
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Abstract
The invention discloses a tiered service aggregation method under the open network environment, which is a scheme for realizing the complex requirement of a user under the open network environment and for realizing the selection control of network resource or service. By aiming at the characteristics of the large scale, the dynamics and the isomerism of the open network environment, the tiered service aggregation method provides an information service five-layer aggregation method comprising an original service resource pool, a selected service resource pool, a relevant service resource pool, a multiattribute selection process and a relevant selection process; and the model is used for realizing the selection control scheme of the model. When the network is formed, the scheme is used for classifying service functions, relevance and the like provided by the user, resource pools of different tiers are built, and a tiered service aggregation decision mechanism based on the QoS is built. The service selection function based on QoS is expanded by the scheme, the dynamic characteristic and the unified interface characteristic of the selection control are added, and a brand-new mode is provided for researching the service selection mechanism under the open network environment.
Description
Technical field
The present invention is one and is opening, under the complex network environment of isomery, realizing that the user is to the classification as required and the scheme of selecting control of Service Source.Be primarily aimed at dynamic, the isomerism of open network environment and serve increasing characteristics, a Service Source of proposition is selected control method.Utilize the method to realize a hierarchical service polymerization from top to bottom, solve the problem that service selection process becomes increasingly complex, belong to information service, Distributed Calculation, security of computer software technology crossing domain.
Background technology
Under the background that global economic integration and IT application process advance to depth, the syncretization of information technology and serviceization development trend are changing the information industry general layout.Information service had become part with the fastest developing speed in the information industry, that technological innovation is the most active, increment effect is maximum already.
Information service be develop information resources be the basis, according to user's request, use electronic information technology that the relevant knowledge content is gathered, processes, stores, transmits, retrieved and utilizes, offer user's services with the blocks of knowledge of new serializing.Come abstract and encapsulation resource is one of main means of resource virtualizing by serving, but service-oriented architecture adopt the pattern of " centered by the service provider ", causes the user to find to increase along with the increase of service with the difficulty of subscription service easily.
In the face of increasing difference service in the network, and the same services that provides of different service providers, as the requestor of service, the process of making services selection becomes and becomes increasingly complex.In order to tackle the present situation that service is expanded, the branch layers of polymer is carried out in information service, it is significant to propose information service layering polymerization.
Summary of the invention
Technical problem: the purpose of this invention is to provide the services selection control implementation under a kind of open network environment, i.e. the method for open network environment lower leaf service aggregating, and realization is based on the services selection implementation of the method.
Technical scheme: the present invention will use for reference the achievement in research of up-to-date classification of service algorithm, characteristics in conjunction with open network environment, the method of a classification of service polymerization is proposed, realize one based on service quality (Qulaity of Service, QoS) and the classification of service polymerization module of demand for security, provide a classification of service polymerization implementation under the open network environment.
The present invention is a kind of scheme of tactic, Reference Services sorting algorithm available research achievements, the ripe quality-of-service based method for service selection (QoS-Based Composition Method) of combination, propose a classification of service polymerization that is adapted under the open network environment, realize user's Dynamic Selection service mechanism.
Hierarchical service polymerization under a kind of open network environment comprises original service resource pool, selected Service Source pond, association service resource pool, multiattribute selection course and related selection course; After the Service Source process multiattribute selection course, become Service Source in the selected Service Source pond in the original service resource pool; In the selected Service Source pond Service Source by related selection course after, present the resource collection that connects each other between Service Source, become Service Source in the association service resource pool; Bound through high-level interface layer and user by Service Source in the association service resource pool, finish user's service request.
Provide definition and the function thereof of basic element in the hierarchical service polymerization below earlier:
1) service requester (Service Requestor): the Service Source on the network is filed a request, have the entity of selecting the optimal service access authorization for resource.This entity possesses particular community and comprises electronic identity certificate, entity role description, entity security rank, entity global trusting degree, entity overall situation recommendation trust degree etc.These attributes will be applied to inter-entity and consult and reciprocal process.A service requester at one time in, can have the role of a plurality of different activity authorities, but can not distribute the role of two mutual exclusions.
2) ISP (Service Provider): at the resource request that service requester on the network proposes, implementation information service providers.This entity by trusted third party (Trusted Third Party, TTP), the service of releasing news on the network.The attribute that entity possesses comprises electronic ID card book, entity security rank, entity global trusting degree, type service is provided, service quality etc. is provided.These attributes will be applied in ISP's grading process.And the service that provides will be described by WSDL (Web Service Description Language), and is published on the network by UDDI (Universal Description Discovery Integration) is unified.
3) atomic service (Atomic Service):, described through WSDL by the TTP of trusted third party by the ISP, be published on the network by UDDI, can directly, independently finish the service of specific function.
4) Virtual Service (Virtual Service): by a plurality of atomic service, according to grammer, semantic combination, formation can be finished non-existent service combining form in certain functional requirement and the network.
5) original service resource pool (Raw Service Resource Pool): under open network environment, one group of functional similarity that the ISP provides but have the set of the service of different service quality, and the service in the pond is through screening.As long as ISP's issuing service, the third party carries out original service and sorts out namely according to type service, and service is divided in the corresponding original Service Source pond.The original service resource pool exists
Being distributed existence on the physical structure, is centralized existence on the logical construction.
6) selected Service Source pond (Selected Service Resource Pool): the original service resource pool is by after the multiattribute selection course, eliminated original functional similarity, but had in the set of service of different service quality, some services that quality is lower, price is higher, the still set of Sheng Xia Service Source.The scale that the service number in this class Service Source pond is scale in the original service resource pool.
7) association service resource pool (Related Service Resource Pool): selected Service Source pond by related selection course after, present the resource collection that connects each other between Service Source.This type of resource pool will disperse originally, Service Source independently, according to grammer, semantic combination, form non-existent Virtual Service in the network.
8) multiattribute selection course (Selection Based on Mutiple Attributes): according to the selection course of relevant measurement technology such as Service Source quality, ISP's confidence level, SKYLINE.This selection course is to avoid some just to add Service Source in network, because the low probability that is eliminated of causing of no deal history, confidence level is bigger, and will take the method for comentropy to carry out balance, selects according to probability.
9) related selection course (Selection Based on Relations): Service Source will be original separate, that do not have association, request history, execution route according to the requestor, setting up the contact between resource, is the prerequisite that the Service Source combination is reused.Through this process, script is atomic service independently, is combined into Virtual Service.
10) network service issue center (Services Public Center): the ISP is when providing local resource or service, to the Network Services Center submit applications.Network service issue center is analyzed the request that the ISP provides, and the service of submitting to is described, assesses, and then the standardized service resource is published on the network.
This method structure is different from traditional network architecture, and the organizational form that the script Service Source is parallel is transformed into three-dimensional, has finished the foundation of the hierarchical architecture of Service Source.When forming unified platform interface, selected Service Source pond (Selected Service Resource Pool), association service resource pool (Related Service Resource Pool), multiattribute selection course (Selection Based on Multiple Attributes) and these four parts of related selection course (Selection Based on Relations) have been increased.By hierarchical architecture, Service Source discrete, unordered in the original network, change into easier that utilized by the user, Service Source is mutually related.Select the network service resource process thereby reach the simplification user, accelerate the efficient that the user selects network service resource, better finish the purpose of user's request.
One, the architecture of hierarchical service polymerization
The hierarchical service polymerization comprises following three major parts:
1, network service issue center (Services Public Center): the issue center is made up of service describing and two parts of service issue.The ISP is when providing local resource or service, to issue center submit applications.Network service issue center is analyzed the request that the ISP submits to, and the service of submitting to is described, assesses, and by service issue part the standardized service resource is published on the network then.
2, multiattribute selection course (Selection Based on Multiple Attributes): select module to form by a plurality of parallel attributes.For example the Service Source quality selects module, ISP's confidence level to select module, SKYLINE to select module etc.This selection course dynamically updates, when new service adds network, the method is according to newly serving institute's function of dominant and relevant attribute, carry out the part relatively, if the grade behind the new service measure is higher, then replace corresponding old service in the selected Service Source pond, be included into corresponding original service resource pool otherwise will newly serve.
3, related selection course (Selection Based on Relations): select module, related module, the related module of selecting of execution route selected of transactions history to form by related module, the semantic association selected of grammer.The execution that is triggered of related selection course is arranged in setting up association service resource pool or selected Service Source pond more under the news.According to grammer, semanteme discrete in the Service Source pond and separate resource are analyzed, in conjunction with the historical and previous service execution path of transaction request, the association between the establishment service.Set up service groups virtual and that can finish certain function.If similar user's request is arranged, platform interface directly provides related service groups for the user, for the user provides related service, selects the network service resource process thereby reach the simplification user, accelerate the efficient that the user selects network service resource, better finish the purpose of user's request.
Two, the workflow of hierarchical service polymerization
The first step, the ISP issues the atomic service resource by trusted third party on network, through multiattribute selection course and related selection course, form selected Service Source pond and association service resource pool;
Second step: the user proposes the Service Source request to the service access platform, and waits for layer interface return results down, and this request comprises that type service, service quality, service safe etc. are at the personalized requirement of different user.If what platform returned is successful execution route, then obtained the service execution path that meets user's request in the network, the high-level interface layer according to execution route, is bound the concrete user that serves, finish user's service request; Otherwise, if what return is searching resource failure, can not realize that then the user asks; The user need propose the Service Source request again;
The 3rd step: the user is after submitting service request to the service access platform, and platform will be analyzed user's request, by analyzing, user's request be resolved into the atomic service that direct correspondence is arranged in the Internet resources pond;
The 4th step: the hierarchical service polymerization is according to the service of decomposing, search association service resource pool, search out degree of association maximum, service price is minimum, service utility is the highest and satisfies the association service group that the user limits, if successfully return the related service group, platform will be according to user's individual demand, make the execution route between each service in the group, finish user's service request, otherwise carry out next step;
The 5th step: the hierarchical service polymerization is according to the service of decomposing, search for selected Service Source pond, search out each stand-alone service that service price is minimum, service utility is the highest and satisfy user's restriction, if successfully return the related service resource, platform will be according to user's individual demand, make the execution route between each service in the group, finish user's service request, otherwise carry out next step;
The 6th step: the hierarchical service polymerization is according to the service of decomposing, search original service resource pool, search out each stand-alone service that service price is minimum, service utility is the highest and satisfy user's restriction, if successfully return the related service resource, platform will be made the execution route between each service in the group according to user's individual demand, finish user's service request, otherwise inform the failure of user search resource, re-execute this process;
The 7th step: by the hierarchical service polymerization technique, user's request is solved.Relation between the atomic service of platform record transactions history, related service execution route and each participation polymerization, the foundation of the relevant polymerization process reference of formation.
Three, hierarchical service polymerization performance evaluation
This programme is primarily aimed at characteristics such as the extensive property, dynamic, isomerism of open network environment and proposes a hierarchical service polymerization, and utilizes the method to realize a services selection control platform.This scheme is dynamic five layers of service aggregating method, and namely when network forms, the service function that provides according to the supplier, association etc. are classified, and set up the resource pool of different levels, have set up the hierarchical service polymerization decision-making mechanism based on QoS.This scheme has been expanded the service selection capability based on QoS, has increased dynamic characteristic and the unified interface characteristic of selecting control, for services selection Study on Mechanism under the open network environment provides a kind of brand-new pattern.Make a concrete analysis of as follows:
(1) this method structure is different from traditional network architecture, and the organizational form that the script Service Source is parallel is transformed into three-dimensional organizational form, has finished the foundation of the hierarchical architecture of Service Source.
(2) when forming unified platform interface, by hierarchical architecture, discrete, unordered Service Source in the original network, change into easier that utilized by the user, Service Source is mutually related, thereby reach the simplification user and select the network service resource process, accelerate the efficient that the user selects network service resource, better finish the purpose of user's request.
(3) this method adopts the thought of layering, has shielded complexity, diversity and the polytropy of Service Source.Simplify the process of user request service resource greatly, made the user select unitized, the standardization of process of serving.
(4) the association service resource pool in this method, be exactly virtual Service Source in logic, it is according to the transactions history in the network and execution route experience, formed the service groups that is mutually related, if similar service request is arranged in the network, platform directly returns the best service groups that is mutually related, and finishes user's request fast and efficiently.
Beneficial effect: use this method to realize that the services selection control under the open network environment has following advantage:
1. can maximally utilise same Virtual Service resource.Through related selection course, there has been relevance between the atomic service, the user selects in the association service resource pool when the request service, and the result directly provides a plurality of atomic service of user's request often according to transactions history and other user's execution route experience.
2. supported the dynamic characteristic of open network environment.Dynamic is the fundamental nature of network, but this method dynamically update the dynamic characteristic that has guaranteed network enabled, adapt to the demand of open network environment.Because method is carried out association with service, different user's request results will be upgraded the association service resource pool, thereby reach the dynamic characteristic of real-time update.
3. this method has better fail safe.Not only comprise service quality in this hierarchical service polymerization, and at different services, method is investigated service provider's degree of belief, guaranteed the confidence level of service.The service selection process of the method has shielded concrete service provider, does not exist so group's deception increases this phenomenon of grade of specified services, thereby has guaranteed that the service that method provides for the user all is best, believable service combination.
4. the design philosophy of stratification makes this method have better expansibility, more can be adapted to the application demand of different user.Through multiattribute selection course and related selection course, formed selected Service Source pond and association service resource pool, shielded complexity, diversity and the polytropy of Service Source.Simplify the process of user request service resource greatly, made the user select unitized, the standardization of process of serving.
The hierarchical service polymerization technique utilizes existing achievement to expand on the basis of following existing services selection technology.The proposition of this method will produce certain impetus to the theoretical research of services selection in the open network and the development of future network platform software thereof, be a kind of new trial to services selection strategy in the future network, and a kind of new thinking is provided.
Description of drawings
Fig. 1 is the structural relation figure of hierarchical service polymerization.
This method has provided basic element service requester (Requestor), ISP (Provider), atomic service (Atomic Service), Virtual Service (Virtual Service), original service resource pool (Raw Service Resource Pool), selected Service Source pond (Selected Service Resource Pool), association service resource pool (Related Service Resource Pool), multiattribute selection course (Selection Based on Multiple Attributes), structural relation between related selection course (Selection Based on Relations) and the network service issue center (Services Public Center).
Fig. 2 is based on the architecture of QoS hierarchical service system of selection.
This architecture is made up of original service resource pool (Raw Service Resource Pool), selected Service Source pond (Selected Service Resource Pool), association service resource pool (Related Service Resource Pool), multiattribute selection course (Selection Based on Multiple Attributes), five parts of related selection course (Selection Based on Relations).
Fig. 3 is based on the workflow diagram of QoS hierarchical service polymerization.
Embodiment
For information service layering polymerization of the present invention is described, in conjunction with following most preferred embodiment, information service is based on the implementation procedure of layering polymerization in the detailed description open network.
Fig. 3 provided user service request under the open network environment, based on the workflow of layering polymerization.Suppose the user to the tourist service of network request Beijing the best, concrete steps are expressed as follows:
The first step, the service provider that tourism is relevant passes through trusted third party, issues the atomic service resource on network, for example: tourist attractions price, tourism route selection, trip mode, accommodation service, food and beverage sevice, financial service etc.Through multiattribute selection course and related selection course, form selected Service Source pond and association service resource pool.
Second step: the user proposes the request of tourism of Beijing Service Source to the service access platform, and waits for layer interface return results down.At user's personalized requirement, this request can comprise quality (this example can be categorized as: commercial, excellent, high, medium), the service safe (as: travel agency's institutional affiliation, trip mode fail safe, food and drink safe class etc.) of type service (this example is tourism), service.If what platform returned is successful execution route, then obtain the service execution path that meets user's request in the network, the high-level interface layer according to execution route, is bound concrete service and user, finish user's service request; Otherwise, if what return is searching resource failure, can not realize that then the user asks; The user need propose the Service Source request again.
The 3rd step: the user is after submitting service request to the service access platform, and platform will be analyzed user's request.By analyzing, user's request is resolved into the atomic service that direct correspondence is arranged in the Internet resources pond; In this example user's request is resolved into: tourist attractions, sight spot price, tourism route selection, trip mode, accommodation service, food and beverage sevice and seven atomic service of financial service.
The 4th step: the hierarchical service polymerization is according to the service of decomposing, and search association service resource pool searches out degree of association maximum, service price is minimum, service utility is the highest and association service group that satisfy user's restriction.If successfully return the related service group, platform will be made the execution route between each service in the group according to user's individual demand, finish user's service request, otherwise carry out next step; In this example, comprise in the service groups of returning: travel agency, tourist attractions (all views of Beijing), sight spot price (being no more than 1000 yuan), tourism route are selected (route is the shortest), trip mode (sightseeing car), accommodation service (high comfort hotel), food and beverage sevice (nothing) and financial service (Bank of Communications).Can make a call to 7 foldings because use the Web bank of Bank of Communications to buy the sight spot ticket, 5 foldings can be made a call to by the hotel that uses Bank of Communications to move in selection, circuit is travel agency and travel staff's best recommended route, and correlative connections such as the group of lowest price is preferential are arranged between tourist attractions and the travel agency.Suppose the service that food and beverage sevice is not associated, so carry out next step.
The 5th step: the hierarchical service polymerization is according to the service of decomposing, search for selected Service Source pond, search out each stand-alone service that service price is minimum, service utility is the highest and satisfy user's restriction, if successfully return the related service resource, platform will be according to user's individual demand, make the execution route between each service in the group, finish user's service request, otherwise carry out next step; In this example, breakfast, lunch, dinner, food, five sub-services of snack are resolved in food and beverage sevice, search for the service of meeting consumers' demand in the selected Service Source pond.Suppose this sub-services of food still not in selected Service Source pond, search out and meet consumers' demand, carry out next step.
The 6th step: the hierarchical service polymerization is according to the service of decomposing, search original service resource pool, search out each stand-alone service that service price is minimum, service utility is the highest and satisfy user's restriction, if successfully return the related service resource, platform will be made the execution route between each service in the group according to user's individual demand, finish user's service request, otherwise inform the failure of user search resource, re-execute this process.
The 7th step: by the hierarchical service polymerization technique, user's request is solved.Relation between the atomic service of platform record transactions history, related service execution route and each participation polymerization, the evidence of the relevant polymerization process reference of formation.In this example food and beverage sevice and the association service that has existed are carried out related selection, form corresponding service groups, for searching the user of tourism of Beijing later on, provide faster, the more search service of high-quality.
Claims (4)
1. the hierarchical service polymerization under the open network environment is characterized in that comprising multiattribute selection course and related selection course; Service Source in the original service resource pool is carried out the multiattribute selection course, become Service Source in the selected Service Source pond; Service Source in the selected Service Source pond is carried out related selection course, present the resource collection that connects each other between Service Source, become Service Source in the association service resource pool; Bound through high-level interface layer and user by Service Source in the association service resource pool, finish user's service request;
Described original service resource pool: under open network environment, one group of functional similarity that the ISP provides but have the set of the service of different service quality, and the service in the pond is through screening; As long as ISP's issuing service, trusted third party carries out original service and sorts out just according to type service, and service is divided in the corresponding original Service Source pond; The original service resource pool is distributed existence in physical structure, is centralized existence on the logical construction;
Described selected Service Source pond: the original service resource pool is by after the multiattribute selection course, eliminated original functional similarity, but had in the set of service of different service quality, some services that quality is lower, price is higher, the still set of Sheng Xia Service Source;
Described multiattribute selection course: according to Service Source quality, ISP's confidence level and SKYLINE, take the method for comentropy to carry out balance, select according to probability;
Described association service resource pool: selected Service Source pond by related selection course after, present the resource collection that connects each other between Service Source; This resource pool will disperse originally, Service Source independently, according to grammer, semantic combination, form non-existent Virtual Service in the network;
Described related selection course: will be original separate, do not have a related Service Source, set up contact between resource according to requestor's request history, execution route, be the prerequisite that the Service Source combination is reused; Through this process, independently atomic service is combined into Virtual Service originally.
2. the hierarchical service polymerization under the open network environment according to claim 1 is characterized in that the basic element that uses in this layering service aggregating method, and definition and function comprise:
1) service requester: the Service Source on the network is filed a request, have the entity of selecting the optimal service access authorization for resource; This entity possesses particular community and comprises electronic identity certificate, entity role description, entity security rank, entity global trusting degree, entity overall situation recommendation trust degree; These attributes will be applied to inter-entity and consult and reciprocal process; A service requester at one time in, can have the role of a plurality of different activity authorities, but can not distribute the role of two mutual exclusions;
2) ISP: at the resource request that service requester on the network proposes, implementation information service providers; This entity is by the TTP of trusted third party, the service of releasing news on the network; The attribute that this entity possesses comprises electronic ID card book, entity security rank, entity global trusting degree, type service is provided, service quality is provided; These attributes will be applied in ISP's grading process; The service that this entity provides will be that Web Service Description Language describes by WSDL, and to be that Universal Description Discovery Integration is unified by UDDI be published on the network;
3) atomic service:, described through WSDL by the TTP of trusted third party by the ISP, be published on the network by UDDI, can directly, independently finish the service of specific function;
4) Virtual Service: by a plurality of atomic service, according to grammer, semantic combination, formation can be finished non-existent service combining form in certain functional requirement and the network;
5) network service issue center: the ISP is when providing local resource or service, to the Network Services Center submit applications; Network service issue center is analyzed the request that the ISP provides, and the service of submitting to is described, assesses, and then the standardized service resource is published on the network.
3. the hierarchical service polymerization under the open network environment according to claim 2 is characterized in that realizing that based on this method the step of categorizing selection control procedure of service is as follows:
The first step: the ISP issues the atomic service resource by trusted third party on network, through multiattribute selection course and related selection course, form selected Service Source pond and association service resource pool;
Second step: service requester is that the user proposes the Service Source request to the service access platform, and waits for layer interface return results down:
If what the service access platform returned is successful execution route, then the user has obtained the service execution path that meets user's request in the network; Again to the high-level interface layer according to execution route, concrete service and user are bound, finish user's service request;
If what return is the searching resource failure, can not realize that then the user asks; The user need propose the Service Source request again;
The 3rd step: the user is after submitting the Service Source request to the service access platform, and platform is analyzed user's request, user's request is resolved into the atomic service that direct correspondence is arranged in the network service resource pond;
The 4th step: this layering service aggregating method is according to the atomic service of decomposing in the step 3, and search association service resource pool searches out degree of association maximum, service price is minimum, service utility is the highest and satisfies the association service group that the user limits; If successfully return satisfactory association service group, then the service access platform is made the execution route between each service in the association service group according to user's individual demand, finishes user's service request; If successfully do not return the association service group, then carry out next step;
The 5th step: this layering service aggregating method is searched for selected Service Source pond according to the atomic service of decomposing in the step 3, searches out each stand-alone service that service price is minimum, service utility is the highest and satisfy user's restriction; If successfully return satisfactory stand-alone service resource, then the service access platform is made the execution route between each stand-alone service according to user's individual demand, finishes user's service request, otherwise carries out next step;
The 6th step: this layering service aggregating method is according to the atomic service of decomposing in the step 3, and search original service resource pool searches out each stand-alone service that service price is minimum, service utility is the highest and satisfy user's restriction; If successfully return satisfactory stand-alone service resource, then the service access platform is made the execution route between each stand-alone service according to user's individual demand, finishes user's service request, otherwise inform the failure of user search resource, re-execute this this step;
The 7th step: the relation between the atomic service of service access platform record transactions history, service execution path and each participation polymerization.
4. the hierarchical service polymerization under the open network environment according to claim 3 is characterized in that the Service Source request is the personalized requirement at different user, comprises type service, service quality and service fail safe in described second step.
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| CN102833315B (en) * | 2012-07-30 | 2015-09-16 | 河海大学 | The building method of the UDDI extended model in a kind of cloud computing environment |
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| CN105306279A (en) * | 2015-11-30 | 2016-02-03 | 国网江西省电力公司信息通信分公司 | Data performance analysis platform and method of enterprise-level application system |
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