کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
452111 694464 2011 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A fast and efficient algorithm to exploit multi-user diversity in IEEE 802.16 BandAMC
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر شبکه های کامپیوتری و ارتباطات
پیش نمایش صفحه اول مقاله
A fast and efficient algorithm to exploit multi-user diversity in IEEE 802.16 BandAMC
چکیده انگلیسی

Mobile broadband wireless access systems like IEEE 802.16/WiMAX use Orthogonal Frequency Division Multiple Access (OFDMA) in order to exploit frequency and multi-user diversity for improving the spectral efficiency. We assume in this work a two-stage approach for resource allocation, whereby scheduling of packets in a given time frame, and their allocation across different subcarriers and time slots, are carried out separately one after the other. We specifically focus on the allocation problem in the second stage. Our first contribution is a problem formulation which is based on a detailed system model close to a practical IEEE 802.16/WiMAX system using BandAMC. The problem is proved to be NPNP-complete. Secondly, we propose a heuristic allocation algorithm, called Maximum Regret Band Allocation, and show through an extensive numerical analysis that it is very effective in realistic scenarios, as well as so computationally efficient to be executed in times in the order of one millisecond.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Networks - Volume 55, Issue 16, 10 November 2011, Pages 3680–3693
نویسندگان
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