Modification des protocoles LEACH et LCM de WSN basés sur le clustering
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La r�duction de l'�nergie est le probl�me majeur des protocoles de routage. Dans cette th�se, nous avons �tendu deux protocoles de routage bas�s sur les grappes afin d'am�liorer la dur�e de vie des r�seaux de capteurs sans fil. Les deux protocoles �tudi�s ici sont: Low-Energy Adaptive Clustering Hierarchy (LEACH) et Link Aware Clustering Mechanism. Le protocole LEACH ne tient pas compte de l'�nergie restante des noeuds lors de la s�lection de la t�te de grappe (CH). �tant donn� que la s�lection des chefs de groupe est probabiliste, un noeud � tr�s faible �nergie a de bonnes chances de devenir un chef de groupe. Lorsque ce noeud meurt, l'ensemble de la grappe devient inop�rant. C'est pourquoi nous tenons compte de l'�nergie restante du noeud lors de la s�lection du CH. Nous fixons un seuil pr�d�termin� lors de la s�lection du CH, seuil qui tient compte de l'�nergie restante du noeud. Nos r�sultats de simulation montrent clairement que la dur�e de vie du LEACH �tendu est meilleure que celle du LEACH. Ses noeuds sont en vie 100 fois plut�t que le protocole LEACH. Dans cette th�se, nous essayons d'am�liorer la m�thode LCM (link-aware clustering method). Dans notre travail, nous nous effor�ons de mettre en oeuvre diff�rents noeuds � diff�rents endroits. Nos simulations d�montrent que les noeuds qui sont �loign�s de la station de base (BS).
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