QoS scheduling for heterogeneous traffic in OFDMA-based wireless systems = 다양한 트래픽의 QoS를 보장하는 OFDMA 기반 무선 시스템의 스케쥴링 기법

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In this thesis, we provide a QoS scheduling framework for heterogeneous traffic in OFDMA based wireless systems. The proposed scheduling algorithm achieves two objectives concurrently, satisfying the QoS requirements of the real-time traffic and providing proportional fairness to the non real-time traffic while utilizing the system resources efficiently. Alpha deadline parameter is introduced to control the balance between the QoS provisioning and the opportunity of diversity gain. This simple parameter has powerful controllability which can fully embody the operating strategy of wireless networks. Step-by-step approach is used to achieve low complexity and traffic class prioritization. For QoS scheduling of the real-time traffic, well-known bipartite matching algorithm is adapted to exploit multi-channel diversity more efficiently. For utility maximization scheduling of the non real-time traffic, log utility function based utility maximization algorithm for multi-channel is used to provide proportional fairness. The characteristics of alpha deadline parameter and the performance of proposed scheduler is validated through the extensive simulation results. The proposed QoS scheduling framework on the basis of alpha deadline parameter can maximize synergy effects when incorporated with the other non real-time traffic scheduling frameworks.
Advisors
Chong, Songresearcher정송researcher
Description
한국과학기술원 : 전기및전자공학전공,
Publisher
한국과학기술원
Issue Date
2009
Identifier
308796/325007  / 020073089
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기및전자공학전공, 2009.2, [ vi, 38 p. ]

Keywords

QoS; Scheduling; 서비스품질; 스케쥴링; QoS; Scheduling; 서비스품질; 스케쥴링

URI
http://hdl.handle.net/10203/38676
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=308796&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
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