Cougar (Mica Mote) A platform for testing query processing techniques over ad-hoc sensor networks Three tier system: – Running TinyOS, an embedded operating.

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Presentation transcript:

Cougar (Mica Mote) A platform for testing query processing techniques over ad-hoc sensor networks Three tier system: – Running TinyOS, an embedded operating system from Berkeley, on the motes – Server handling query interface with motes and database mapping – GUI human usable interface

Three Tier Architecture Thin Client GUI Server (Java) TinyOS/NesC Radio Communication Wire/Wireless Communication

Mote Capabilities Processing – Aggregation of network data – In network processing of data – In network, de-localized storage of data Sensing – Light – Temp – Sound – Voltage – Hardware extendible

Neighbor Table Each node maintains a table containing information about neighboring nodes Allows for geographical routing “Dead” nodes are removed from neighbor table after timeout period

Geographical Routing (GPRS) Route messages from source to destination by location of intermediate nodes Each node has a neighbor table containing node id and coordinates of neighboring nodes Source Destination Intermediates

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