In this paper we present algorithms for building and maintaining effi- cient aggregation trees th... more In this paper we present algorithms for building and maintaining effi- cient aggregation trees that provide the conduit to dissemi nate data required for processing monitoring queries in a wireless sensor network. While prior tech- niques base their operation on the assumption that the sensor nodes that collect data relevant to a specified query need to include their measu rements
Complex on-demand data retrieval and processing is a charac teristic of several applications and ... more Complex on-demand data retrieval and processing is a charac teristic of several applications and com- bines the notions of querying & search, information filterin g & retrieval, data transformation & analysis, and other data manipulations. Such rich tasks are typicallyrepresented by data processing graphs, hav- ing arbitrary data operators as nodes and their producer-co nsumer interactions as edges. Optimizing and
In this paper we present algorithms for building and maintaining effi- cient aggregation trees th... more In this paper we present algorithms for building and maintaining effi- cient aggregation trees that provide the conduit to dissemi nate data required for processing monitoring queries in a wireless sensor network. While prior tech- niques base their operation on the assumption that the sensor nodes that collect data relevant to a specified query need to include their measu rements
Complex on-demand data retrieval and processing is a charac teristic of several applications and ... more Complex on-demand data retrieval and processing is a charac teristic of several applications and com- bines the notions of querying & search, information filterin g & retrieval, data transformation & analysis, and other data manipulations. Such rich tasks are typicallyrepresented by data processing graphs, hav- ing arbitrary data operators as nodes and their producer-co nsumer interactions as edges. Optimizing and
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