US 2010/0306189 A1 · SENSOR NETWORK MANAGING APPARATUS AND METHOD THEREOF

Abstract

The present invention relates to a sensor network managing apparatus and a method thereof. The sensor network managing apparatus according to the present invention receives a query that includes a spatial join predicate for searching for target sensor nodes and a comparison predicate that is different for each sensor network, and generates query execution order information for searching for the target sensor nodes based on the spatial join predicate and the comparison predicate, wherein the spatial join predicate is related to a spatial location between sensor nodes respectively included in different sensor networks, and the comparison predicate are related to sensing values of sensor nodes of the sensor networks. In addition, the sensor node managing apparatus executes queries for the spatial join predicate and the comparison predicate on the plurality of sensor nodes on the basis of determined query execution order, and then extracts target sensor nodes as the query results. According to the present invention, an efficient method for searching for user-desired sensor nodes in more than two different sensor networks can be provided.

Claims11

Dependent claims

A sensor node managing apparatus that transmits/receives data through connection with more than two different sensor networks, each of which includes a plurality of sensor nodes, the sensor node managing apparatus comprising:

a query optimization unit receiving a query that includes a spatial join predicate for searching for target sensor nodes and a comparison predicate that is different for each sensor network, and
generating query execution order for searching for the target sensor nodes based on the received query, wherein the spatial join predicate is related to a spatial location between the sensor nodes respectively included in different sensor networks, and wherein the comparison predicate is related to sensing values of the sensor nodes from the respective sensor networks;
and a query execution unit executing the spatial join predicate and the comparison predicate on the more than two different sensor networks based on the query execution order received from the query optimization unit, and extracting the target sensor nodes by using a result of the execution.

A sensor node managing method for managing more than two different sensor networks, each including a plurality of sensor nodes, the sensor node managing method comprising:

receiving a query that includes a spatial join predicate for searching target sensor nodes and a comparison predicate that is different for each sensor network, wherein the spatial join predicate is related to a spatial location between the sensor nodes, each included in a different sensor network, and wherein the comparison predicate is related to sensing values of the sensor nodes in each sensor network;
determining query execution order for searching target sensor nodes respectively included in the more than two different sensor networks on the basis of the spatial join predicate and the comparison predicate;
executing a query of the spatial join predicate and the comparison predicate for the plurality of sensor nodes on the basis of the determined query execution order;
and
extracting the target sensor nodes as a query result of the executing of the query.

2 more elements

Dependencies are inferred from the claim text.

Sensor network managing apparatus and method thereof

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Sensor network managing apparatus and method thereof

Life of this patent

Abstract

Claims11