Query-based data collection in wireless sensor networks with mobile sinks

Authors:
Long Cheng;Yimin Chen;Canfeng Chen;Jian Ma
Affiliations:
Beijing University of Posts and Telecommunications, Beijing, China;Stanford University, Stanford, California;Nokia Research Center, Beijing, China;Nokia Research Center, Beijing, China
Venue:
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
Year:
2009

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Abstract

Considering sensor nodes deployed densely and uniformly in the sensing field, we focus on a scenario that a mobile sink moving through the sensing field queries a specific area or a point of interest for data collection. A Query packet is injected by the mobile sink and routed to the specific area, then the corresponding Response packet is returned to the mobile sink via multi-hop communication. Due to the mobility of the sink, the Query and Response should have different routes. We analyze such a network model to address the problem of efficient data collection in wireless sensor networks and propose an efficient Query-Based Data Collection Scheme (QBDCS). In order to minimize the energy consumption and packet delivery latency, QBDCS chooses the optimal time to send the Query packet and tailors the routing mechanism for partial sensor nodes forwarding packets. Simulation results demonstrate that QBDCS completes a query-based data collection cycle with minimum energy consumption and delivery latency.