دانلود مقاله ISI انگلیسی شماره 70598
عنوان فارسی مقاله

مکانیسم عقب رفتن معکوس برای شبکه های ad hoc وسایل نقلیه ایمن

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
70598 2014 15 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Reverse back-off mechanism for safety vehicular ad hoc networks
منبع

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

Journal : Ad Hoc Networks, Volume 16, May 2014, Pages 210–224

کلمات کلیدی
شبکه های وسایل نقلیه؛ beaconing ایمنی؛ کنترل دسترسی متوسط؛ IEEE 802 - 11p؛ عقب رفتن مکانیسم
پیش نمایش مقاله
پیش نمایش مقاله مکانیسم عقب رفتن معکوس برای شبکه های ad hoc وسایل نقلیه ایمن

چکیده انگلیسی

Vehicular ad hoc networks can play an important role in enhancing transportation efficiency and improving road safety. Therefore, direct vehicle-to-vehicle communications are considered as one of the main building blocks of a future Intelligent Transportation System. The success and availability of IEEE 802.11 radios made this technology the most probable choice for the medium access control layer in vehicular networks. However, IEEE 802.11 was originally designed in a wireless local area network context and it is not optimised for a dynamic, ad hoc vehicular scenario. In this paper, we investigate the compatibility of the IEEE 802.11 medium access control protocol with the requirements of safety vehicular applications. As the protocols in this family are well-known for their scalability problems, we are especially interested in high density scenarios, quite frequent on today’s roads. Using an analytical framework, we study the performance of the back-off mechanism and the role of the contention window on the control channel of a vehicular network. Based on these findings, we propose a reverse back-off mechanism, specifically designed with road safety applications in mind. Extensive simulations are carried out to prove the efficiency of the proposed enhancement scheme and to better understand the characteristics of vehicular communications.

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