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Distributed semantic repository and discovery architecture
Distributed semantic repository and discovery architecture
Distributed semantic repository and discovery architecture
Distributed semantic repository and discovery architecture
Distributed semantic repository and discovery architecture
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Distributed semantic repository and discovery architecture

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Wei Wang, Distributed semantic repository and discovery architecture

Wei Wang, Distributed semantic repository and discovery architecture

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  • 1. IoT Service Discovery Architecturein IoT.est Project
  • 2. Service discovery in IoT.est• It is the most important component for theknowledge management module in the IoT.estproject.• It provides a number of functionalitiesessential for other work packages in servicecreation, composition, testing anddeployment.– semantic annotation for IoT services– service description data distribution/storage– IoT service lookup and discovery 2
  • 3. Proposed solution• Our solution: geospatial indexing + distributedsemantic repository;• Performing semantic search on semantic repositoriesensures the accuracy: support more meaningful andexpressive queries;• Geospatial indexing (e.g., R-Tree) ensures the searchefficiency: efficiently reduce the search scope duringdiscovery.3
  • 4. Update operations in the discoveryplatform• updating R-Tree is an expensive operation;• however, since the leaves in the R-Tree are semanticrepositories (e.g., Gateways), even the serviceschange frequently, the R-Tree may not need to beupdated.• most changes are constrained within the managinggateways:– Update messages do not need to propagate– significantly reduces computational complexity of theupdate operations in dynamic environments.4
  • 5. Implementation5http://en.wikipedia.org/wiki/File:R-tree.svg

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