Moataz Fouad Youssef Abdo <br/><br/>
A framework for enhanced wireless sensor network  energy management using adaptive radio duty cycling  in contikiMAC /  
 إطار عمل لتحسين إدارة طاقة شبكة الأستشعار الالسلكية باستخدام تعديل دورة عمل الراديو في كونتيكي ماك  
Moataz Fouad Youssef Abdo ; Supervised Khaled Mohammed Fouad Elsayed , Ahmed Hamdi Zahran 
 - Cairo :   Moataz Fouad Youssef Abdo ,   2014 
 - 72 P. :   charts , facsimiles ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Electronics and Communication  Engineering  
<br/><br/> Wireless sensor networks face several challenges in field deployments due to strict  limitations in nodes hardware capabilities. We propose two temporal radio duty-cycle  frequencies update mechanisms namely: a distributed mechanism in which a WSN sink node  collects network-wide statistics and broadcasts thresholds to the nodes to adjust their duty  cycles and an autonomous mechanism in which each node individually updates its duty-cycle  based on its measured statistics. Our simulations show significant gains in network life time  while maintaining sensory packets delivery ratio at same levels compared with static schemes     
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<br/><br/><label>Subjects--Index Terms: </label>ContikiMAC ContikiOS  COOJA