دانلود مقاله ISI انگلیسی شماره 70366
عنوان فارسی مقاله

برآورد کیفیت لینک قابل اطمینان در شبکه های بی سیم کم قدرت و تاثیر آن بر درخت مسیریابی

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
70366 2015 25 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Reliable link quality estimation in low-power wireless networks and its impact on tree-routing
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Ad Hoc Networks, Volume 27, April 2015, Pages 1–25

کلمات کلیدی
برآورد کیفیت لینک؛ لینک کم قدرت؛ شبکه های حسگر بی سیم؛ ویژگی های لینک؛ مسیریابی درخت
پیش نمایش مقاله
پیش نمایش مقاله برآورد کیفیت لینک قابل اطمینان در شبکه های بی سیم کم قدرت و تاثیر آن بر درخت مسیریابی

چکیده انگلیسی

Radio link quality estimation is essential for protocols and mechanisms such as routing, mobility management and localization, particularly for low-power wireless networks such as wireless sensor networks. Commodity Link Quality Estimators (LQEs), e.g. PRR, RNP, ETX, four-bit and RSSI, can only provide a partial characterization of links as they ignore several link properties such as channel quality and stability. In this paper, we propose F-LQE (Fuzzy Link Quality Estimator, a holistic metric that estimates link quality on the basis of four link quality properties—packet delivery, asymmetry, stability, and channel quality—that are expressed and combined using Fuzzy Logic. We demonstrate through an extensive experimental analysis that F-LQE is more reliable than existing estimators (e.g., PRR, WMEWMA, ETX, RNP, and four-bit) as it provides a finer grain link classification. It is also more stable as it has lower coefficient of variation of link estimates. Importantly, we evaluate the impact of F-LQE on the performance of tree routing, specifically the CTP (Collection Tree Protocol). For this purpose, we adapted F-LQE to build a new routing metric for CTP, which we dubbed as F-LQE/RM. Extensive experimental results obtained with state-of-the-art widely used test-beds show that F-LQE/RM improves significantly CTP routing performance over four-bit (the default LQE of CTP) and ETX (another popular LQE). F-LQE/RM improves the end-to-end packet delivery by up to 16%, reduces the number of packet retransmissions by up to 32%, reduces the Hop count by up to 4%, and improves the topology stability by up to 47%.

خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.