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MAC Scheduling Scheme for VoIP Traffic Service in 3G LTE  

Jun, Kyung-Koo (인천대학교 멀티미디어시스템공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.6A, 2007 , pp. 558-564 More about this Journal
Abstract
3G Long Term Evolution, which aims for various mobile multimedia service provision by enhanced wireless interface, proposes VoIP-based voice service through a Packet Switching (PS) domain. As delay and loss-sensitive VoIP traffic flows through the PS domain, more challenging technical difficulties are expected than in Circuit Switching (CS) domain based VoIP services. Moreover, since 3G LTE, which adopts the OFDM as its physical layer, introduces Physical Resource Block (PRB) as a unit for transmission resources, new types of resource management schemes are needed. This paper proposes a PRB scheduling algorithm of MAC layer for VoIP service in 3G LTE and shows the simulation results. The proposed algorithm has two key parts; dynamic activation of VoIP priority mode to satisfy VoIP QoS requirements and adaptive adjustment of the priority mode duration in order to minimize the degradation of resource utilization.
Keywords
MAC scheduling; VoIP; PRB; 3G LTE;
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