زمان بندی مبتنی بر Guard zone در شبکه های ad hoc
|کد مقاله||سال انتشار||مقاله انگلیسی||ترجمه فارسی||تعداد کلمات|
|70526||2015||9 صفحه PDF||سفارش دهید||7961 کلمه|
Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Computer Communications, Volume 56, 1 February 2015, Pages 89–97
In this paper we propose and evaluate a simple scheduling technique that suppresses transmissions by nodes around the desired receiver. Using stochastic geometry, we derive a near-optimal guard zone which can be easily realized in a distributed manner, and exhibits about a 2–40 fold increase in capacity compared to ALOHA; the capacity increase depending primarily on the required outage probability and node density. The capacity loss is about 15–25% compared to a well-known near-optimal centralized scheme. In contrast to centralized scheduling (which is highly impractical), our scheme lends itself to distributed implementation and also protects active links. Our derivations cleanly capture how the optimal guard zone size varies with different network parameters like path loss, outage, spreading gain, and node density, and we show how these results can be used to provide protocol design guidelines.