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Based on the input from ECOMP Service IM input, ONAP R2+ Service IM is designed as below class diagram:
In this diagram, both design time and run time service related objects are depicted.
For the design time section on the left side,
ServiceDescriptor is used to model the design time representation of a service.
Nested Service Design is supported by the association "ServiceComprisedOf", as a ServiceDescriptor can be composed of other ServiceDescriptor(s).
Complicated Service Design is supported by the association "ServiceComposedOf", as a ServiceDescriptor can be composed of at least 1 or more ServiceComponentDescriptor(s).
- Hybrid Service Design is also supported, as a part of a ServiceDescriptor can be composed of ServiceComponenDescriptor(s) and part of it can be composed of other ServiceDescriptor(s).
- ServcieComponentDescriptor is used to model the design time representation of a service component or network service.
Nested Service Component Design is supported by the association "ServiceComponentComprisedOf", as a ServiceComponentDescriptor can be composed of other ServiceComponentDescriptor(s).
Complicated Service Component Design is supported by the association "ServiceComponentComposedOf", as a ServiceComponentDescriptor can be composed of at least 1 or more ResourceDescriptor(s).
Hybrid Service Component Design is also supported, as a part of a ServiceComponenetDescriptor can be composed of ServiceComponentDescriptor(s) and part of it can be composed of other ResourceDescriptor(s).
ResourceDescriptor is used to model the design time representation of a resource.
Cross reference in resource design is supported via the association "ResourceDescriptorReferencesResourceReferences".
For the run time section on the right side, similiar layering from top to bottom of instance items and relationship between is modeled, as the result of the model-driven instantiation process from a given ServiceDescriptor. In particular,
- Based on 1 ServiceDescriptor, 0 or more ServiceInstance(s) can be instantiated, which also instantiate the association "ServiceDescriptorMadeAvailableAs". A ServiceInstance can comprise other ServiceInstance(s) or ServiceComponentInstance(s), as modeled by the associations "ServiceComprisedOf" and "ServiceComposedOf".
- Based on 1 ServiceComponentDescriptor, 0 or more ServiceComponentInstance(s) can be instantiated, which also instantiate the association "ServiceComponentDescriptorMadeAvailableAs". A ServiceComponentInstance can comprise other ServiceComponentInstance(s) or ResourceInstance(s), as modeled by the associations "ServiceComponentComprisedOf" and "ServiceComponentComposedOf".
- Based on 1 ResourceDescriptor, 0 or more ResourceInstance(s) can be instantiated, which also instantiates the association "ResourceDescriptorMadeAvailableAs". A ResourceInstance can reference other ResourceInstance(s).
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Take the ONAP R1 VoLTE use case as an example. The E2E VoLTE service can be designed as the service; The IMS, EPC, and WAN can be designed as the service components. The HSS, CSCF, TAS, SBC, MME, and SPGW etc, and the link between them can be design as the resources.
Attributes
ServiceDescriptor
| R2+ Attributes | Description | Producer | Consumer | SDC(Service) | AAI(model+model-ver) | ECOMP IM(ServiceCatalogItem) |
| InvariantUUID | Constant identifier of the service model | SDC | SDC/SO/UUI/VID | invariantUUID | model.model-invariant-id for that service model |
| UUID | Versioned identifier of the service model (this uuid is changed for every major version of the service) | SDC | SDC/SO/UUI/VID | UUID | model-ver.model-version-id for that service model | ServiceUUID |
| name | The name of the service model designed | SDC | SDC/SO/UUI/VID | name | model-ver.model-name for that service model | ServiceDisplayName |
| description | The description of the service model designed | SDC | SDC/SO/UUI/VID | description | model-ver.model-description for that service model | ServiceDescription |
| category | A predefined list which identifies the construct's category. There is a predefined list of service categories | SDC | SDC/SO/UUI/VID | Category | n/a | Category |
| version | The service model version | SDC | SDC/SO/UUI/VID | model-ver.model-version for that service model | Version | |
| serviceType | An optional string field defining a generic type (like category) of the service. E.g. this field can be used for defining the service as “TRANSPORT”. | SDC | SDC/SO/UUI/VID | serviceType | ||
| serviceRole | An optional string field for shortcode that defines the function that the service is providing. E.g. “MISVPN” or “AIM”. | SDC | SDC/SO/UUI/VID | serviceRole | ||
| icon | The icon path of the service | SDC | SDC/SO/UUI/VID | n/a | Icon | |
| serviceComponentUUID | The service component descriptor UUIDs that the service includes (relationhip to Service Component) | SDC | SDC/SO/UUI/VID |
ServiceInstance
| R2+ Attributes | Description | Producer | Consumer | AAI(ServiceInstance) |
| serviceInstanceIdservice-Instance-Id | Uniquely identifies this instance of a service | SO | AAI/UUI/VID/SO/Policy/Holmes | service-Instance-Id |
| serviceInstanceNameservice-instance-name | The name assigned to the service-instance | UUI/VID/SO | AAI/UUI/VID/SO | service-instance-name |
| service-instance-descprtion | The description assigned to the service-instance | UUI/VID/SO | AAI/UUI/VID/SO | service-instance-descprtion |
| serviceInvariantUUIDmodel-invariant-uuid | Constant identifier of the service model (relationship to service model) | SDC/SO | AAI/UUI/VID/SO | model-invariant-id model-invariant-id + model-version-id (model-uuid) stand for the relationships with the descriptor and persona-mode-version (model-version) is an attribute of the description. |
| ServiceUUIDmodel-uuid | Versioned identifier of the service model (relationship to service model) | SDC/SO | AAI/UUI/VID/SO | model-version-id model-invariant-id + model-version-id (model-uuid) stand for the relationships with the descriptor and persona-mode-version (model-version) is an attribute of the description. |
| ServiceVersionmodel-version | The service model version in SDC catalog | SDC/SO | AAI/UUI/VID/SO | persona-Model-Version model-invariant-id + model-version-id (model-uuid) stand for the relationships with the descriptor and persona-mode-version (model-version) is an attribute of the description. |
| service-type | An optional string field defining a generic type (like category) of the service. E.g. this field can be used for defining the service as “TRANSPORT”. | SDC/SO | AAI/UUI/VID/SO | service-type service-type and service-role should be in the descriptor and not the instance (at the info modeling level). |
| service-role | An optional string field for shortcode that defines the function that the service is providing. E.g. “MISVPN” or “AIM”. | SDC/SO | AAI/UUI/VID/SO | service-role service-type and service-role should be in the descriptor and not the instance (at the info modeling level). |
| selfLink | URL to endpoint where more details can be gotten | SO | AAI/UUI/VID/SO | selflinkorchestrationStatus |
| orchestration-status | Orchestration status of the service instance | SO | AAI/UUI/VID/SO/Policy/Holmes | orchestration-statusserviceComponentInstanceId |
| service-component-Instance-Id | The service component instance ID that the service instance includes | VFC/... | AAI/UUI/VID/SO/Policy/Holmes | Relationship to nested ServiceInstances |
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| R2+ Attributes | Description | Producer | Consumer | ETSI IFA014(NetworkService) |
| vnfdid | References the VNFD of a constituent VNF. | SDC | SDC/UUI/VFC | vnfdid |
| pnfdId | References the PNFD of a constituent PNF. | SDC | SDC/UUI/VFC | pnfdId |
| virtualLinkDesc | Provides the constituent VLDs. | SDC | SDC/UUI/VFC | virtualLinkDesc |
ServiceComponentInstance
| R2+ Attributes | Descripion | Producer | Consumer | AAI |
ETSI IFA013(NS) | |||
| instanceId | Uniquely identifies this instance of a service component | SO/VFC | AAI/UUI/VFC/Policy/Holmes |
| nsInstanceId |
| name | The name assigned to the service component instance | UUI/VFC | AAI/UUI/VFC/Policy/Holmes | nsName |
| model- |
| invariant-uuid | Constant identifier of the service component model | SDC/VFC | AAI/UUI/VFC | nsdId | |
| model- |
| uuid | Versioned identifier of the service component model (this uuid is changed for every major version of the service component) | SDC/VFC | AAI/UUI/VFC | ||
| model-version |
| The service version in SDC catalog | VFC | AAI/UUI/VFC |
| selfLink | URL to endpoint where more details can be gotten | VFC | AAI/UUI/VFC |
| orchestration-status | Orchestration status of the service component instance | VFC | AAI/UUI/VFC/Policy/Holmes |
| nsState | |||||
| description | The description of service component instance | VFC | AAI/UUI/VFC | description |
Network Service Instance
Inherit from ServiceComponentInstance
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