Smart Service Proxy


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Smart Service Proxy provides direct access to
- linked sensor data and linked sensor-related data,
- aggregation of such data based on the real thing they are associated to

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Smart Service Proxy

  1. 1. Semantic-Service Provisioning for the Internet of Things using Future Internet Research by Experimentation Smart Service Proxy Oliver Kleine, Henning Hasemann, Alexander Kroeller
  2. 2. Initial situation Diverse network types (Internet (www), WSN) Diverse protocol standards Proprietary communication
  3. 3. Target situation HTTP/TCP endpoints in WSNs not possible due to resource constraints!
  4. 4. Semantic Entities
  5. 5. Semantic Entities
  6. 6. SE types: Service-Level SE
  7. 7. SLSE Construction
  8. 8. Se Types: In-Network SE
  9. 9. INSE Construction
  10. 10. The CoAP protocol IETF-draft (developed by CoRE working group) Lightweight alternative to HTTP  GET/POST/PUT/DELETE for RESTful service provisioning  Optional transport reliability Some main features (from draft-ietf-coap-07):  UDP-binding with optional reliability  Supporting unicast and multicast messages  Asynchronous message exchanges  Low Header-Overhead  URI and content-type support  Simple proxy and caching capabilities  Stateless HTTP mapping
  11. 11. CoAP devices CoAP on Sensor Nodes  RESTful webservices – Current values of sensors – Semantic self-descriptions (from WP 2)  Accessable by any CoAP-Client from anywhere CoAP-Client for JAVA and Android  Enable CoAP on a wide range of potential client devices Smart Service Proxy  Caching of current values and self-descriptions  Enables HTTP access to CoAP-services
  12. 12. The Smart Service Proxy Developed in cooperation between WP1 and WP3 Border device WSN <-> Internet  HTTP/TCP endpoint from internet perspective  CoAP/UDP endpoint from WSN perspective Several Backends  CoAP Backend (Translation HTTP <-> CoAP)  SLSE Backend  Any other backend
  13. 13. SSP: Network environment
  14. 14. SSP: More detailed insight