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The A&AI subsystem uses graph data technology to store relationships between inventory items. Graph traversals can then be used to identify chains of dependencies between items. Relationships captured by A&AI include “top to bottom” relationships such as those defined in SDC when products are composed of services, and services are composed of resources. It also includes “side to side” relationships such as end-to-end connectivity of virtualized functions to form service chains. A&AI also keeps track of the span of control of each controller, and is queried by MSO and placement functions to identify which controller to invoke to perform a given operation.
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Active and Available Inventory (A&AI) is the ECOMP component that provides real-time views of D2 Resources, Services, Products, and Customer Subscriptions for D2 services. Figure 12 provides a functional view of A&AI. The views provided by Active and Available Inventory relate data managed by multiple ECOMP, BSS, OSS, and network applications to form a “top to bottom” view ranging from the Products customers buy to the Services and Resources used to compose the Products. Active and Available Inventory not only forms a registry of Products, Services, and Resources, it also maintains up-to-date views of the relationships between these inventory items across their lifecycles. To deliver the vision of the dynamism of D2, Active and Available Inventory will manage these multi-dimensional relationships in real-time.
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