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Recently, many studies exploit mobile sinks to collect sensor data for environmental observations or weather forecasting. Mobile sinks travel in sensing areas and collect data directly from each sensor. By using mobile sinks, we can reduce communication traffic further than that for the case of constructing sensor networks. However, in many methods, the mobile sink collects data from all sensors that...
In mobile ad hoc networks (MANETs), to acquire only necessary data items, it is effective that each mobile node retrieves data items using a top-k query, in which data items are ordered by the score of a particular attribute and the query-issuing mobile node acquires data items with k highest scores. In our previous works, we proposed query processing methods for top-k query for reducing traffic and...
In the location dependent information services, not only estimation of the coordinates of a user (coordinate estimation), but also existence check of a user whether he/she exists in a certain area or not (area estimation) are required. However, no existing research on location estimation method using wireless communication treats both coordinate estimation and area estimation simultaneously with high...
In mobile wireless sensor networks (MWSNs), since sensor nodes are highly resource constrained, it is effective to retrieve sensor observations using a top-k query, in which the observations are ordered by the value (or score) of a particular type of sensor, and the query-issuing node acquires sensor observations with the highest scores. In our previous work, we proposed a message processing method...
In mobile ad hoc networks (MANETs), to acquire only necessary data items, it is effective that each mobile node retrieves data items using a top-k query, in which data items are ordered by the score of a particular attribute and the query-issuing mobile node acquires data items with k highest scores. In this paper, we propose a query processing method for top-k query for reducing traffic and also...
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