Exploiting Mobility for Efficient Data Dissemination in Wireless Sensor Networks

다국어 초록 (Multilingual Abstract)

In this paper, we introduce a novelmobility model for mobile
sinks in which the sinks move towards randomly distributed
destinations, where each destination is associated with a mission.
The novel mobility model is termed the random mobility with destinations.
There have been many studies on mobile sinks; however,
they merely support two extreme cases of sink mobility. The first
case features the most common and general mobility, with the sinks
moving randomly, unpredictably, and inartificially. The other case
takes into account mobility only along predefined or determined
paths such that the sinks can gather data from sensor nodes with
minimum overhead. Unfortunately, these studies for the common
mobility and predefined path mobility might not suit for supporting
the random mobility with destinations. In order to support random
mobility with destination, we propose a new protocol, in which
the source nodes send their data to the next movement path of a
mobile sink. To implement the proposed protocol, we first present
a mechanism for predicting the next movement path of a mobile
sink based on its previous movement path. With the information
about predictedmovement path included in a query packet, we further
present a mechanism that source nodes send energy-efficiently
their data along the next movement path before arriving of the mobile
sink. Last, we present mechanisms for compensating the difference
between the predicted movement path and the real movement
path and for relaying the delayed data after arriving of the mobile
sink on the next movement path, respectively. Simulation results
show that the proposed protocol achieves better performance than
the existing protocols.

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