On adaptive contention resolution schemes for IEEE 802.16 BWA systems

Der Jiunn Deng, Chih Heng Ke

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


According to the latest version of the IEEE 802.16 standard, the mandatory contention resolution method is the truncated binary exponential backoff, with the initial window size and the maximum window size controlled by the base station. However, the problem of choosing the right set of backoff parameters for the current network level remains unsolved and left as an open issue since this strategy might incur a high collision probability and the channel utilization could be degraded in congested scenario. In this paper, we propose two pragmatic adaptive algorithms, namely semi-dynamic and quasi-dynamic contention resolution schemes, that allow the base station to adjust its backoff window size based on current channel status. By controlling the size of backoff window according to varying network conditions, both schemes are able to achieve higher performance in comparison with the legacy IEEE 802.16 standard.

Original languageEnglish
Article number205057
JournalEurasip Journal on Wireless Communications and Networking
Publication statusPublished - 2009 Aug 24

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Computer Science Applications
  • Computer Networks and Communications

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