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Register a new userThe Reliability of Wireless Sensor Networks Used For Early Detection of Fire, Status: Fir & Cedar Preserve in Lattakia, Syria
وثوقية شبكات الحسّاسات اللاسلكية المستخدمة للكشف المبكّر عن الحرائق دراسة حالة : محميّة الشّوح و الأرز في محافظة اللاذقية, سورية
1981
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وجهّت العديد من الأبحاث الحديثة تركيزها على مسألة وثوقية شبكات الحسّاسات اللاسلكية المستخدمة في التّطبيقات المختلفة, و خاصّة في الكشف المبكّر عن حرائق الغابات لضمان وثوقية إنذارات التّنبيه المرسلة من قبل الحسّاسات و التّقليل من معدّل الإنذارات غير الصّحيحة. لذا حاولنا في هذا البحث تقييم وثوقية هذه الشبكات المستخدمة للكشف المبكّر عن الحرائق في محميّة الشّوح و الأرز بشكل رئيسي, من خلال تصميم شبكة حسّاسات لاسلكية هجينة تُحاكي تضاريس المحميّة و نمذجتها باستخدام برنامج المحاكاة Opnet14.5. تمت المحاكاة وفقاً لعدّة سيناريوهات من حيث سماحية عطل متزايدة للشّبكة ناتجة عن اندلاع الحريق و انتشاره بدءاً بسماحية 0%, و مقارنة نتائجها مع نتائج تطبيق المعادلات الرّياضية للوثوقية وفق حالات السّيناريوهات ذاتها. إضافةً لحساب التّوافرية النّهائية من خلال اقتراح آلية لتحسين وثوقية الشّبكة المستخدمة باستخدام الفائضية، أي إضافة العقد الحسّاسة الاحتياطية و التي تحلُّ مكان العقد التّالفة نتيجة الحريق, و قد أثبتت النّتائج زيادة الوثوقية بشكل ملحوظ. كما تمّ التّنبؤ بوثوقية الشّبكة المصمّمة بناءً على قيم وثوقية مختلفة للعقد المستخدمة باستخدام أحد أدوات الوثوقية و هو المخطّط الصّندوقي.
A lot of research directed its concern to the reliability of Wireless Sensor Networks (WSNs) used in various applications, especially in early detection of forest fires to ensure the reliability of warning alarms sent by sensors and reduce the average of false warnings. In this research we have tried to evaluate the reliability of WSN used in early detection of fires in Fir and cedar preserve, mainly. By designing hybrid WSN network, similar to the terrains of the preserve and modeling it using program Opnet14.5. We have studied several scenarios, to allow increasing malfunction of the network resulting from fire break out and spreading: starting in allowance of 0% and comparing its results the results of mathematical equations of reliability according to the same scenarios. In addition, we have calculated the final availability through suggesting a mechanism to improve WSN reliability using the redundancy, i.e add sensitive spare nodes, which replace the damaged ones as the result of fire. The results have proved the remarkable increasing of reliability. Also, it has been predicted of the reliability of the network designed according to reliability of different values of the nodes used by using one of the reliability devices "the Block Diagram".
References used
QIU, W.; SKAFIDAS, E. and HAO, P. "Enhanced tree routing for wireless sensor networks". Ad Hoc Networks, 2009, 638-650
XIA, F.; TIAN, Y.C.; LI, Y.J.; and SUN, Y.X. "Wireless sensor/actuator network design for mobile control applications". Sensor, 7(10), 2007, 2157- 2173
KOUSHANFAR, F.; POTKONJAK, M. and VINCENTELLI, A.S. "Fault Tolerance in Wireless Sensor network". In Handbook of Sensor Networks: Compact Wireless and Wired Sensing Systems, CRC press, Chp. 36, 2004, 1- 15
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