Multimedia Channel Allocation in Cognitive Radio Networks using FDM-FDMA and OFDM-FDMA
Ansuman Bhattacharya, Rabindranath Ghosh, Koushik Sinha, Debasish, Datta, and Bhabani P. Sinha

TL;DR
This paper introduces a novel channel allocation method in cognitive radio networks that uses non-contiguous channels with FDM-FDMA and OFDM-FDMA, significantly improving allocation speed and success rate under heavy traffic.
Contribution
The paper proposes a new channel allocation technique utilizing non-contiguous channels with FDM-FDMA and OFDM-FDMA, along with algorithms and protocols, outperforming existing methods in efficiency and speed.
Findings
Outperforms first-fit and best-fit in attempts needed for channel acquisition.
Allocates channels in less than one second at 96% traffic load with FDM-FDMA.
OFDM-FDMA takes 4.5 seconds, still outperforming existing methods.
Abstract
In conventional wireless systems, unless a contiguous frequency band with width at least equal to the required bandwidth is obtained, multimedia communication can not be effected with the desired Quality of Service. We propose here a novel channel allocation technique to overcome this limitation in a Cognitive Radio Network which is based on utilizing several non-contiguous channels, each of width smaller than the required bandwidth, but whose sum equals at least the required bandwidth. We present algorithms for channel sensing, channel reservation and channel deallocation along with transmission and reception protocols with two different implementations based on and techniques. Simulation results for both these implementations show that the proposed technique outperforms the existing first-fit and best-fit~\cite{b109, b110} allocation techniques in terms of the…
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Taxonomy
TopicsCognitive Radio Networks and Spectrum Sensing · Wireless Communication Networks Research · Cooperative Communication and Network Coding
