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http://dx.doi.org/10.5762/KAIS.2013.14.2.850

Supporting Service Continuity in OFDMA Systems  

Lee, Jong-Chan (Dept. of Computer Information Eng., Kunsan National University)
Park, Sang-Joon (Dept. of Computer Information Eng., Kunsan National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.14, no.2, 2013 , pp. 850-857 More about this Journal
Abstract
The objective of this paper is to provide service continuity based on an efficient subchannel allocation in OFDMA systems. The resource management for handover are necessary to maintain the QoS requirements of different multimedia applications because the service continuity may be defected by some delay and information loss. Therefore we propose two subchannel management schemes applied to OFDMA systems. Firstly, a superposition allocation of interference subchannels is achieved by modifying a frequency reuse scheme, using co-subchannel interference principle. Secondly for handover applications, we suggest a novel subchannel reservation scheme to adjust the number of allocated channels, depending on the different characteristics and diverse quality of mobile multimedia applications. Simulation results show that the total throughput for the proposed method is increased up to 20% at average and peak arrivals and the handover failure rate is decreased to about 25%, as compared to the conventional method.
Keywords
LTE-Advanced; OFDMA; QoS; Subchannel Interference;
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Times Cited By KSCI : 3  (Citation Analysis)
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