% $Id: abstract.tex,v 1.8 2005/04/08 21:21:45 gokhale Exp $

\begin{abstract}
{\em
A number of data dissemination techniques have been proposed for
wireless sensor networks recently, however, they fail to address
the following challenges effectively: (1) Propagation of data 
interest and reinforcement of dissemination paths is accomplished
by way of broadcast, which is inefficient. (2)  Current approaches
either require the sinks to forward their locations throughout 
the network or are only suitable for localized sink mobility. 

This paper describes EASM, an energy-efficient arbitrary sink mobility
data dissemination scheme to address these challenges.  Sink and
source nodes in EASM 
communicate through rendezvous points. Thus a sink interested in a
particular event directly queries and gets a response from 
corresponding source node using the rendezvous point as a mediator.
This eliminates the need to flood the network with interest 
or advertisement messages.  We also propose a novel {\em directed
response} approach for sending the reply based on the instantaneous sink
location at the time of the query, which ensures a response even for fast
moving sinks.  The system replicates rendezvous points to reduce
hot-spot usage complexity.  Our results show that EASM effectively
reduces energy consumption.  Results also indicate that EASM
efficiently handles and is preferred scheme for arbitrary degrees of
sink mobility. 
}

{\bf keywords:} Wireless sensor networks, Data dissemination protocols,
performance.
\end{abstract}

\iffalse
% A category with the (minimum) three required fields
\category{I.6.5}{Simulation and Modeling}{Model Development}[Modeling
Methodologies]
%A category including the fourth, optional field follows...
\category{D.2.4}{Software Engineering}{Software Program
Verification}[model checking]

\terms{Design, Experimentation, Standardization}

\keywords{Wireless sensor networks, Data dissemination protocols,
performance.}
\fi

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