Novel service protocol for supporting remote and mobile users in wireless sensor networks with multiple static sinks |
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Authors: | Euisin Lee Soochang Park Jeongcheol Lee Seungmin Oh Sang-Ha Kim |
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Affiliation: | (1) Computer Engineering Department, Chungnam National University, Daejeon, Korea |
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Abstract: | A wireless sensor network typically consists of users, a sink, and a number of sensor nodes. The users may be remotely connected
to a wireless sensor network and via legacy networks such as Internet or Satellite the remote users obtain data collected
by the sink that is statically located at a border of the wireless sensor network. However, in practical sensor network applications,
there might be two types of users: the traditional remote users and mobile users such as firefighters and soldiers. The mobile
users may move around sensor fields and they communicate with the static sink only via the wireless sensor networks in order
to obtain data like location information of victims in disaster areas. For supporting the mobile users, existing studies consider
temporary structures. However, the temporary structures are constructed per each mobile user or each source nodes so that
it causes large energy consumption of sensor nodes. Moreover, since some of them establish the source-based structure, sinks
in them cannot gather collective information like mean temperature and object detection. In this paper, to effectively support
both the remote users and the mobile users, we propose a novel service protocol relying on the typical wireless sensor network.
In the protocol, multiple static sinks connect with legacy networks and divide a sensor field into the number of the multiple
sinks. Through sharing queries and data via the legacy networks, the multiple static sinks provide high throughput through
distributed data gathering and low latency through short-hops data delivery. Multiple static sinks deliver the aggregated
data to the remote users via the legacy networks. In case of the mobile users, when a mobile user moves around, it receives
the aggregated data from the nearest static sink. Simulation results show that the proposed protocol is more efficient in
terms of energy consumption, data delivery ratio, and delay than the existing protocols. |
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