ارائه يك تكنيك بهبود‌يافته مشبك پوشش چندتايي با استفاده از مدل حسگري احتمالي براي شبكه‌هاي حسگر بي‌سيم
الموضوعات :عبدالرضا واقفی 1 , مهدی ملامطلبی 2
1 - دانشگاه آزاد اسلامی قزوین
2 - دانشگاه آزاد اسلامی بوئین زهرا
الکلمات المفتاحية: شبکه حسگر بی‌سیمپوشش منطقهرویکرد مشبکارزیابی پوشش تاییمدل حسگری احتمالی,
ملخص المقالة :
یکی از چالش‌های اساسی در شبکه‌های حسگر بی‌سیم، مسأله پوشش ناحیه تحت بررسی توسط یک یا چند گره است. به علت عمر محدود حسگرها و نیاز به داده‌های معتبر، کاربردهای نظارتی حساس نظیر شناسایی حریق، تشعشعات، نشت گاز، شناسایی نفوذ و غیره، پوشش منطقه تحت بررسی به وسیله چند گره حسگر انجام می‌گیرد که به آن پوشش تایی می‌گویند. اکثر تحقیقات گذشته در زمینه ارزیابی پوشش تایی بر اساس مدل حسگری باینری صورت گرفته است. تحقیق حاضر بر آن است که ارزیابی پوشش تایی را با رویکرد تقسیم‌بندی مشبک و از طریق مدل حسگری احتمالی و با هدف بهبود دقت و کاهش زمان ارزیابی پوشش انجام دهد. در پایان نیز روش پیشنهادی در محیط نرم‌افزار 2NS پیاده‌سازی و با روش‌های پیرامونی احتمالی و مشبک باینری، مقایسه شد. نتایج حاکی از بهبود دقت به میزان 14% و 24% نسبت به روش‌های مقایسه‌شده و کاهش زمان محاسبه ارزیابی پوشش تایی به میزان 7% نسبت به روش پیرامونی احتمالی است.
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