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http://dx.doi.org/10.3837/tiis.2013.08.008

Sub-channel Allocation Based on Multi-level Priority in OFDMA Systems  

Lee, JongChan (Department of Computer Information Engineering, Kunsan National University)
Lee, MoonHo (Department of Multimedia Science, Chungwoon University)
Publication Information
KSII Transactions on Internet and Information Systems (TIIS) / v.7, no.8, 2013 , pp. 1876-1889 More about this Journal
Abstract
Packet-based mobile multimedia services for the Internet differ with respect to their resource requirements, performance objectives, and resource usage efficiencies. Nonetheless, each mobile terminal should support a variety of multimedia services, sometimes even simultaneously. This paper proposes a sub-channel allocation scheme based on multi-level priority for supporting mobile multimedia services in an Orthogonal Frequency Division Multiple Access (OFDMA) system. We attempt to optimize the system for satisfying the Quality of Service (QoS) requirements of users and maximize the capacity of the system at the same time. In order to achieve this goal, the proposed scheme considers the Signal-to-Interference-plus-Noise Ratio (SINR) of co-sub-channels in adjacent cells, the Signal-to-Noise Ratio (SNR) grade of each sub-channel in the local cell on a per-user basis, and the characteristics of the individual services before allocating sub-channels. We used a simulation to evaluate our scheme with the performance measure of the outage probabilities, delays, and throughput.
Keywords
OFDMA; Sub-channel Allocation; QoS; SNR/SINR; Priority Index;
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