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\section{Conclusions}
\label{sec:conclusions}

This paper discusses the design of a novel data dissemination scheme 
called EASM for supporting arbitrary degrees of sink mobility.
The EASM scheme is highly scalable, especially for high sink speeds.
It ensures data delivery for local as well as global sink 
movement patterns. The results indicate that the energy consumption
is substantially reduced using EASM. It uses node replication as a
means to (1) reduce hot-spot message complexity and (2) increase
system fault tolerance.  Our extensive ns-2 based simulations
establish the efficiency and scalability of the proposed solution
approach for data dissemination. In future work we propose to
investigate the effects of data aggregation~\cite{AIDA:04} and
real-time data dissemination mechanisms~\cite{he03speed}. 


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