WO2009111938A1

WO2009111938A1 - Service finding method, system and device

Info

Publication number: WO2009111938A1
Application number: PCT/CN2008/073586
Authority: WO
Inventors: 李德旭; 郭中杰; 盛金文; 陈齐标
Original assignee: 华为技术有限公司
Priority date: 2008-03-14
Filing date: 2008-12-18
Publication date: 2009-09-17
Also published as: CN101237457A; CN101237457B

Abstract

A service finding device disclosed in the present implementation includes a service level agreement regular module for formatting the quality of service ability information provided by the service provider based on the service level agreement template and generating the service level agreement description information; and a service issue module for issuing the service basis information, quality of service ability information and said service level agreement description information. A service finding system and method are also disclosed in the present invention. The invention can convert the high technicality QoS parameter into the high-layerparameter description what the clients can understand easily, through the service QoS ability information provided by the different providers is formatted and the QoS ability information registered by the different providers is described with the uniform standard, to help the clients inquire accurately the service satisfying their requirements.

Description

A service discovery method, system and device The present application claims to be filed on March 14, 2008, the Chinese Patent Office, Application No. 200810084732.8, the priority of the Chinese patent application entitled "A service discovery method, system and device" The entire contents of which are incorporated herein by reference. Technical field

The present invention relates to the field of communications technologies, and in particular, to a service discovery method, system, and device. Background technique

Service registration and service discovery are key mechanisms for solving the current service island problem. Users can automatically establish related relationships with services, services and services, and block complex issues such as service integration and configuration and registration during interaction. Provides a unified view of services with cross-operator, cross-platform interoperability. The service description describes the characteristics of the service, such as features, interfaces, workflows, and service level agreements (SLAs), so that the services can communicate with each other, register, and expose themselves, be discovered, and called. You can use WSDL (Web Service Description Language) to describe the description language of the characteristics, interfaces, workflows and other attributes of the Web service, or use WSLA (Web Service SLA Language) to describe the Web service SLA logic. Description language. On the one hand, service discovery refers to the ability to automatically establish a connection between a service requester and a service provider without human intervention and intervention; on the other hand, for a service, it can dynamically notify entities in the network, Register your own attribute information so that other entities on the network can easily discover the service.

The SLA is an agreement between the service provider and the service requester, which enables the parties to reach a consensus on the quality of service, priority and respective responsibilities specified in the agreement. In accordance with the mechanisms provided by the SLA management technology, the service provider makes a detailed commitment to all aspects of the services provided that may affect the customer experience. In the whole process, if the promise is not satisfied, the compensation will be automatically made or the problem will be dealt with.

In the process of implementing the present invention, the inventors discovered that:

Supporting service delivery with QoS (Quality of Service) description information and service discovery based on QoS constraints, different service providers are registered with the UDDI (Universal Description Discovery and Integration Protocol) center When serving, due to the difference in service QoS provisioning capabilities, different service providers have different requirements for the service level of the same service and the value range of each level of QoS parameters. This is for the user to query the service according to the service QoS capability. It is difficult. Moreover, the service discovery mechanism based on keywords and simple classification of traditional UDDI centers can not meet the requirements well. The service discovery based on QoS constraints requires users to input specific QoS parameters and parameter value ranges, and most QoS parameters are technically meaningful. Very strong, the user is difficult to understand, so it is difficult to determine the specific value range of the QoS parameters, which is not conducive to the user to find the service that meets their requirements in this way. Summary of the invention

The embodiment of the invention provides a service discovery method, system and device, and implements service delivery and SLA-based service implementation that supports SLA information from the requirements of the user for service quality, and helps the user to accurately find and meet his own requirements. Service.

An embodiment of the present invention provides a service discovery device, including:

a service level agreement planning module, configured to normalize processing service quality capability information provided by a service provider according to a service level agreement template, and generate service level agreement description information;

And a service publishing module, configured to release service basic information, quality of service capability information, and the service level agreement description information.

Embodiments of the present invention provide a service discovery system, including a unified description, discovery, and integration protocol unified description, discovery and integration protocol center, a service level agreement proxy device, and a service providing device. The service level agreement proxy device,

And receiving service quality capability information and basic information issued by the service provider, and normalizing the service quality capability information provided by the service provider according to the service level agreement template, generating service level agreement description information, and Service level agreement description information, basic information, and quality of service capability information are published.

An embodiment of the present invention provides a service discovery method, including the following steps: receiving service description information published by a service provider, and extracting service quality capability description information from the service description information;

And normalizing the service quality capability description information of the service according to the service level agreement template of the service type to which the service belongs, and generating service level agreement description information of the service;

The service level agreement description information is released.

In the embodiment of the present invention, the service QoS capability information provided by different service providers is normalized, and the QoS capability information of different service provider registration services is described based on the unified standard, and the technically strong QoS parameters are converted into users. Understand the high-level parameter description, help users to accurately find the service that meets their own requirements. DRAWINGS

1 is a system architecture diagram of an SLA agent in an embodiment of the present invention;

2 is a flow chart of service delivery carrying SLA information in an embodiment of the present invention; and FIG. 3 is a flow chart of service discovery based on SLA in the embodiment of the present invention. detailed description

The present invention provides a system for supporting service delivery carrying SLA information and service discovery based on SLA. In the case of the existing UDDI center, the service provider directly registers the Web service information described by the WSDL to the UDDI center, and the service requester directly queries the UDDI center for the required Web service, and the related operations do not need to go through the SLA agent. Embodiments of the present invention implement an SLA-based Web service note by adding an SLA agent to a UDDI center. Book and discovery, users can conduct service inquiry through SLA agent according to service quality requirements, and service providers can perform automatic SLA standardized service release through SLA agent. In the implementation process, the SLA agent can be implemented as a separate network element, or by enhancing the existing functions of the UDDI center.

In order to support the service to be automatically discovered and used, the service provider needs to describe the service in a specific description language before the service is released. For the Web service, the basic information and QoS capability information of the service is generally in accordance with the Web such as WSDL. The service description language describes the SLA information of the Web service, which is generally described in the SLA-specific description language such as WSLA. These description languages define a set of XML (Extensible Markup Language)-based grammar, so The various types of information described in these description languages are XML files. The basic information and SLA information of the Web service are described in the description language as described above. With the help of the synchronization mechanism of the UDDI Center, Web services can achieve a single release globally available.

The system architecture of the SLA agent in the embodiment of the present invention is as shown in FIG. 1, and includes: a UDDI center 100, an SLA agent 200, a user equipment 300, and a service provider 400. The UDDI center 100 is configured to provide an information registration function for the Web service service and implement the query function of the Web service. The service provider 400 is configured to register the Web service information of the WSDL description to the UDDI center 100 through the SLA agent 200, and the service requester (User Equipment) 300 also queries the UDDI Center through the SLA Agent to query the required Web services. The SLA agent 200 is configured to receive the service quality capability information and the basic information issued by the service provider 400, and normalize the service quality capability information provided by the service provider according to the service level agreement template to generate a service level agreement description information. And publishing the service level agreement description information, basic information, and quality of service capability information, and allowing the user to query according to the service level agreement description information.

The service discovery device specifically includes: a service publishing module 210, which is an interface for performing service registration, and the service provider issues basic information of the web service and QoS capability information of the web service through the interface. The basic information of the Web service includes: a service type, a provider, a call port, an operation included in the service, input and output parameters included in the operation, a data type of the input and output parameters, and the like, and a call service, the content of the message is transmitted. Need SOAP (Simple Object Access Protocol) binding information. The QoS capability information of the Web service includes: a service type, a service provider identifier, a QoS parameter, and a QoS providing capability. The QoS parameters may include one or more of the following parameters: network bandwidth, delay, jitter, packet loss, service availability, average failure recovery time, and the like. The QoS provision capability refers to the range of QoS parameters that the service provider can provide. The QoS provision capabilities of different service providers are different depending on the internal technical implementation and resource status of the service provider. For example, the IP telephony service provided by service provider A can only ensure that the network delay is 100ms. Service provider B also provides IP telephony services, but can provide two levels. The higher level can ensure the network delay is 50ms, and the lower level. It can ensure that the network delay is <100ms, and the QoS providing capabilities of the two are different. The service provider B's QoS provision capability is stronger than the service provider. After receiving the web service information published by the service provider, the QoS capability information extraction sub-module 211 in the monthly service release module extracts the QoS capability information, invokes the SLA planning module to generate the SLA description information, and distributes the sub-module through the service description information. The service information is posted to the UDDI center 100 along with the SLA information.

The SLA template library 220 is used to store standardized SLA templates for various services. These SLA templates can be defined by reference to industry standards, or can be formulated by operators according to their operational needs. The SLA template contains calculation rules for processing technology-based QoS parameters and generating customer-oriented high-level parameter descriptions, such as customized service levels. The SLA template includes the following rule information: Platinum, Gold, Silver, Bronze or High, Medium, Normal, etc., and QoS parameters and value ranges corresponding to different levels, for example: Platinum-level network video on demand service QoS The parameters and the range of values are as follows: Bandwidth = 5M, delay 50ms, etc., while the QoS parameters and value range of the gold level are specified as follows: Bandwidth = 3M, delay 100ms, etc. The QoS parameters covered at each level can include: network bandwidth, latency, jitter, packet loss, service availability, average time to failure recovery, and more. Other high-level parameters for customers such as: image quality, channel switching, etc. The SLA template library can be placed on the SLA proxy device or stored separately.

The SLA planning module 230 is configured to perform normalization processing on the QoS capability information of the service provided by the service provider according to the SLA template. Upon receiving the Web service QoS capability information, the SLA template acquisition sub-module 231 provides the service from the SLA template library according to the service type. The SLA normalization processing sub-module 232 processes the rules according to the rules contained in the SLA template to generate normalized SLA description information for the user. For example, the SLA planning module 230 receives the QoS capability description information of a network video conference service, where two service levels defined by the service provider are recorded: member level, common level, corresponding QoS parameters and value ranges are as follows: : Membership level, Bandwidth = 5M, Delay 50ms, Service availability > 99 %; Normal level, Bandwidth = 3M, Delay 100ms, Service availability > 90%. The SLA planning module 230 finds the SLA template of the service according to the name of the service to the SLA template library 220. The SLA template defines four standard service levels of Platinum, Gold, Silver, and Bronze, for each A level specifies the range of values for parameters such as bandwidth, latency, and service availability. The SLA planning module 230 compares the service levels in the received QoS capability information with the levels specified in the template, and finds that the membership level of the service corresponds to the standard gold level, and the common level corresponds to the standard copper level. The service level information will be added to each level of the service QoS capability description information.

The service query module 240 is an interface for performing a service query, and the user inputs a service keyword and other constraints through the interface to perform service search. In addition to information such as service keywords, a user's query request can also specify a customized service level or other customized quality description parameters. Among them, service keywords include service name, identifier, functionality, input and output parameters, etc.; service levels such as Platinum, Gold, Silver, Bronze, etc.; Other user-friendly high-level parameter information such as: Quality (HD) ), channel switching ( ls ), etc. Users do not need to input specific QoS parameters and their value requirements when expressing service quality requirements, but only need to input service keywords, service levels or other quality information that users can easily understand, and it is convenient for users to express their services. Quality requirements. The service query module 240 simply references the UDDI Center 100 query function and returns the returned result to the user, who can select the desired service from the result output according to his or her needs. In addition, the service query module 240 may not perform any special processing on the query request, allowing the user to query using only information such as service keywords.

The service release process supporting the carrying of SLA information in the embodiment of the present invention is as shown in FIG. 2, and includes the following steps:

Step 201: The service provider initiates a service registration request. In this embodiment, the request parameter The number includes service type, service description information, and QoS capability information. The QoS capability information includes: a service type, a service provider identifier, a QoS parameter, and a QoS providing capability. The QoS parameters may include one or more of the following parameters: network bandwidth, delay, jitter, packet loss, service availability, and average failure recovery time.

Step 202: The service publishing module obtains QoS capability information from the service request, and submits the information to the SLA planning module for processing.

Step 203: The SLA planning module requests an SLA template of the service type from the SLA template library according to the service type.

Step 204: The SLA template library returns an SLA template corresponding to the service type to the SLA planning module.

Step 205: The SLA planning module normalizes the QoS capability information according to the rules included in the SLA template, and generates normalized SLA description information.

Step 206: The SLA planning module returns the normalized SLA description information of the service to the service publishing module.

Step 207: The service publishing module issues the basic description information of the service together with the QoS capability information and the normalized SLA description information to the UDDI center.

Step 208: The UDDI center returns the release result to the service publishing module.

Step 209: The service publishing module returns a publishing result to the service provider. So far, the monthly service provider has completed the release of the service. The service in the UDDI center contains QoS capability information and customized SLA description information.

The process of service discovery based on SLA in the embodiment of the present invention is as shown in FIG. 3, and includes the following steps:

Step 301: The user initiates a service query request, and inputs or selects a service keyword, a service level, or other high-level quality parameter constraint information that is easy for the user to understand through the service query module, for example, the service level is high, the image quality is high, and the channel switching delay is Is et al.

Step 302: The service query module initiates a query request to the UDDI center according to the constraint information input or selected by the user.

Step 303: The UDDI center sends the query result list of the service to the service query module. Step 304: The service query module displays the query result list of the service to the user. Step 305: The user selects a service from the service query result list, and initiates a service call request according to the basic description information of the service and the SLA description information.

In the embodiment of the present invention, the service QoS capability information provided by different service providers is normalized, and the QoS capability information of different service provider registration services is described based on the unified standard, and the technically strong QoS parameters are converted into users. The high-level parameter descriptions, such as: high-level service level, high-definition picture quality, channel switching delay, etc., are convenient for users to find services that meet the quality requirements based on the above-mentioned high-level quality parameters. In addition, with automated operator-specific QoS capabilities, service providers can simply use neutral technical parameters for service delivery without the need to care about customer-facing details. In addition, the service provider's services can be distributed to multiple operators through a simple and consistent publishing mechanism. Separating customer operations from service development while implementing SLA-based service publishing and discovery, service providers are focused on service development, thereby enhancing division of labor and increasing efficiency.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by hardware or by software plus necessary general hardware platform. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several The instructions are for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.

In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

A service discovery device, comprising:

2. The service discovery device of claim 1, further comprising: a service level agreement template library for providing a service level agreement template for a particular service type.

3. The service discovery device according to claim 1, further comprising: a service query module, configured to receive query constraint information input or selected by the user, and submit the constraint information to the unified description, discovery, and integration protocol center for service query. And displaying the query result to the user, where the constraint information includes: a service keyword, a service level, or a high-level parameter.

4. The service discovery device according to claim 1, wherein the service delivery module comprises:

The service quality capability information extraction submodule is configured to extract the service quality capability description information from the service description information published by the service provider.

The service discovery device according to claim 4, wherein the service level agreement planning module comprises:

The service level agreement template obtaining submodule is configured to request and obtain a service level agreement template of the service type from the service level agreement template library according to the service type corresponding to the service quality capability description information to be processed;

The service level agreement normalization processing sub-module is configured to extract a service type corresponding to the service quality capability description information to be processed, and submit the service type information to the service level agreement template acquisition module, and then obtain the provided by the sub-module according to the service level agreement template. The service level agreement template of the service type normalizes the service quality capability description information.

6. The service discovery device of claim 1 wherein said service level The protocol template library includes a plurality of service level agreement templates corresponding to specific service types stored in the database, and the service level agreement template includes various rules for converting the service quality parameters of the service types into high-level parameters.

7. A service discovery system comprising a unified description, discovery and integration protocol unified description, discovery and integration protocol center, service level agreement proxy device and service providing device, characterized in that

The service level agreement proxy device is configured to receive the service quality capability information and basic information issued by the service provider, and normalize the service quality capability information provided by the service provider according to the service level agreement template to generate a service level. The protocol describes the information, and publishes the service level agreement description information, basic information, and quality of service capability information.

8. A service discovery method, comprising the steps of:

Receiving service description information issued by the service provider, and extracting service quality capability description information from the service description information;

The service level agreement description information is released.

The service discovery method according to claim 8, further comprising: receiving a query query information input or selected by the user, and performing a service query, where the constraint information comprises: a service keyword, a service level, or a high-level parameter.

The service discovery method according to claim 8, wherein before the normalizing the service quality capability description information of the service according to the service level agreement template of the service type, the method further includes:

And requesting and acquiring a service level agreement template of the service type according to the extracted service type information.

The service discovery method according to claim 8, wherein before the requesting and acquiring the service level agreement template of the service type according to the extracted service type information, the method further includes: Extract corresponding service type information from the service quality capability description information.

12. The service discovery method according to claim 8, further comprising: pre-setting a service level agreement template of different service types, wherein the service level agreement template includes converting the service quality parameter with the service type into a high-level parameter. Various rules.

The service discovery method according to claim 12, wherein the quality of service parameter comprises one or more of the following parameters: network bandwidth, delay, jitter, packet loss, service availability, and average fault recovery time. .