AMC-aware QoS proposal for OFDMA-based IEEE802.16 WiMAX systems

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Abstract

OFDMA-based IEEE802.16 implements Adaptive Modulation and Coding (AMC) which results in a different bit rate for each user depending on its position in the cell as well as the radio condition it experiences; users away from the base station experience lower throughput. We hence propose in this paper a new QoS solution that compensates the degradation in modulation by a higher number of sub-carriers so as to maintain the bit rate of streaming flows at a constant level throughout the whole coverage area. This proposal is modeled analytically in a dynamic user configuration, where users of both types, streaming and elastic, remain in the system for a finite duration. And this in multi-cell environment and for different frequency reuse schemes.

Original languageEnglish
Title of host publicationIEEE GLOBECOM 2007 - 2007 IEEE Global Telecommunications Conference, Proceedings
Pages4780-4784
Number of pages5
DOIs
Publication statusPublished - 1 Dec 2007
Event50th Annual IEEE Global Telecommunications Conference, GLOBECOM 2007 - Washington, DC, United States
Duration: 26 Nov 200730 Nov 2007

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference

Conference

Conference50th Annual IEEE Global Telecommunications Conference, GLOBECOM 2007
Country/TerritoryUnited States
CityWashington, DC
Period26/11/0730/11/07

Keywords

  • AMC
  • Capacity
  • IEEE802.16
  • OFDMA
  • QoS
  • Reuse partitioning
  • WiMAX

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