Journal of Communications and Networks

  • 제14권6호
  • /
  • Pages.692-702
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  • 2012
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  • 1229-2370(pISSN)
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  • 1976-5541(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지

Adaptive Priority-Based Downlink Scheduling for WiMAX Networks

  • Wu, Shih-Jung (Department of Innovative Information and Technology, Tamkang University in Taiwan (R.O.C.)) ;
  • Huang, Shih-Yi (Chunghwa Telecom Laboratories in Taiwan (R.O.C.)) ;
  • Huang, Kuo-Feng (Department of Information Technology and Mobile Communication, Taipei College of Maritime Technology in Taiwan (R.O.C.))
  • 투고 : 2011.02.11
  • 심사 : 2012.05.14
  • 발행 : 2012.12.31
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초록

Supporting quality of service (QoS) guarantees for diverse multimedia services are the primary concerns for WiMAX (IEEE 802.16) networks. A scheduling scheme that satisfies QoS requirements has become more important for wireless communications. We propose a downlink scheduling scheme called adaptive priority-based downlink scheduling (APDS) for providing QoS guarantees in IEEE 802.16 networks. APDS comprises two major components: Priority assignment and resource allocation. Different service-type connections primarily depend on their QoS requirements to adjust priority assignments and dispatch bandwidth resources dynamically. We consider both starvation avoidance and resource management. Simulation results show that our APDS methodology outperforms the representative scheduling approaches in QoS satisfaction and maintains fairness in starvation prevention.

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