Qos Aware Adaptive Resource Allocation Techniques for Fair Scheduling in OFDMA Based Broadband Wireless Access Systems

Mustafa Ergen*, Sinem Coleri, Pravin Varaiya

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

266 Citations (Scopus)

Abstract

A system based on orthogonal frequency division multiple access (OFDMA) has been developed to deliver mobile broadband data service at data rates comparable to those of wired services, such as DSL and cable modems. We consider the resource allocation problem of assigning a set of subcarriers and determining the number of bits to be transmitted for each subcarrier in OFDMA systems. We compare simplicity, fairness and efficiency of our algorithm with the optimal and proposed suboptimal algorithms for varying values of delay spread, number of users and total power constraint. The results show that performance of our approach is appealing and can be close to optimal. We also consider another resource allocation scheme in which there is no fixed QoS requirements per symbol but capacity is maximized.

Original languageEnglish
Pages (from-to)362-370
Number of pages9
JournalIEEE Transactions on Broadcasting
Volume49
Issue number4
DOIs
Publication statusPublished - Dec 2003
Externally publishedYes

Keywords

  • Adaptive modulation
  • Broadband wireless networks
  • Fair scheduling
  • IEEE 802.16
  • Multiple access
  • Multiuser OFDM
  • Multiuser diversity
  • OFDMA
  • Power control
  • Resource allocation

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