X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/ThesisAli.git/blobdiff_plain/672f1f775e091f7120b3ad28a38dc90f11163105..3313e6276d22777963ea82537e0735dbfa6971ee:/CHAPITRE_01.tex diff --git a/CHAPITRE_01.tex b/CHAPITRE_01.tex index 76780d9..971dbeb 100644 --- a/CHAPITRE_01.tex +++ b/CHAPITRE_01.tex @@ -407,6 +407,7 @@ In this section, two energy consumption models are explained. The first model ca \subsection{Radio Energy Dissipation Model} +\label{ch1:sec9:subsec1} Since the communication unit is the most energy-consuming part inside the sensor node, and accordingly there are many authors used the radio energy dissipation model that proposed in~\cite{ref109,ref110} as energy consumption model during the simulation and evaluation of their works in WSNs. Figure~\ref{RDM} shows the radio energy dissipation model. \begin{figure}[h!] \centering @@ -441,6 +442,7 @@ The radio energy dissipation model have been considered only the energy consumed \subsection{Our Energy Consumption Model} +\label{ch1:sec9:subsec2} In this dissertation, the coverage protocols have been used an energy consumption model proposed by~\cite{ref111} and based on \cite{ref112} with slight modifications. The energy consumption for sending/receiving the packets is added, whereas the part related to the sensing range is removed because we consider a fixed sensing range. For our energy consumption model, we refer to the sensor node Medusa~II which uses an Atmels AVR ATmega103L microcontroller~\cite{ref112}. The typical architecture of a sensor is composed of four subsystems: the MCU subsystem which is capable of computation, communication subsystem (radio) which is responsible for transmitting/receiving messages, the sensing subsystem that collects data, and the power supply which powers the complete sensor node \cite{ref112}. Each of the first three subsystems can be turned on or off depending on the current status of the sensor. Energy consumption @@ -476,7 +478,7 @@ COMPUTATION & on & on & on & 26.83 \\ \end{table} For the sake of simplicity we ignore the energy needed to turn on the radio, to start up the sensor node, to move from one status to another, etc. -Thus, when a sensor becomes active (i.e., it has already chosen its status), it can turn its radio off to save battery. The value of energy spent to send a 1-bit-content message is obtained by using the equation in ~\cite{ref112} to calculate the energy cost for transmitting messages and we propose the same +Thus, when a sensor becomes active (i.e., it has already chosen its status), it can turn its radio off to save battery. The value of energy spent to send a 1-bit-content message is obtained by using the equation in ~\cite{ref112} to calculate the energy cost for transmitting messages and we propose the same value for receiving the packets. The energy needed to send or receive a 1-bit packet is equal to $0.2575~mW$.