دانلود مقاله ISI انگلیسی شماره 70287
عنوان فارسی مقاله

ارزیابی عملکرد برنامه نویسی شبکه در شبکه های ad hoc بی سیم IEEE 802.11

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
70287 2014 11 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Performance evaluation of network coding in IEEE 802.11 wireless ad hoc networks
منبع

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

Journal : Ad Hoc Networks, Volume 16, May 2014, Pages 131–141

کلمات کلیدی
برنامه نویسی شبکه؛ شبکه ad hoc بی سیم؛ شبکه بی سیم؛ سنجش عملکرد
پیش نمایش مقاله
پیش نمایش مقاله ارزیابی عملکرد برنامه نویسی شبکه در شبکه های ad hoc بی سیم IEEE 802.11

چکیده انگلیسی

We evaluate the practical network coding (NC) gain in a wireless ad hoc networks. First, we introduce how network coding can be applied to IEEE 802.11 ad hoc networks. Next, we find obstructive factors by which the NC gain may decrease as compared with the theoretical NC gain. Finally, through the performance evaluation, we analyze why a performance difference occurs between practical and theoretical NC gains owing to the suggested obstructive factors. According to the simulated results, even though there is some overhead caused by the characteristics of the media access control (MAC) protocol and control signals to apply NC to wireless ad hoc networks, the practical NC gain is almost the same as the theoretical gain in an ideal environment for NC. However, in the NC system with the hidden node problem, the NC gain decreases because of packet collision. In the NC system using a promiscuous mode where packet overhearing is possible, nodes consume more power than the conventional system because of overhearing packets. For instance, when the number of overhearing nodes not related to NC is set to 15, the power reduction rate is −38.04%. Furthermore, under the network conditions inappropriate for NC, such as asymmetric flows and scarce coding structures, the NC gain can be considerably reduced. For example, in 5 × 5 and 7 × 7 grid topology networks, the load reduction rate by NC are only 4.12% and 7.01%, respectively. Therefore, research to solve the suggested obstructive factors is necessary to achieve sufficient NC gain in a practical wireless network such as an IEEE 802.11 ad hoc networks.

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