Performance of the EY-NPMA Protocol

K. Fu*, Y. J. Guo, S. K. Barton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


The throughput of the Elimination Yield Non-pre-emptive Priority Multiple Access (EY-NPMA) protocol, which has been chosen as the medium access control (MAC) protocol for HIPERLAN, is simulated. Connection between users is based on a statistical model of path loss with power law against distance and 6 dB log-normal shadowing. It is shown that the throughput performance of the EY-NPMA protocol in networks of moderate size and with small proportion of hidden nodes is satisfactory. For a fully connected network, the throughput reaches 0.85 at an offered traffic of 1 and remains at this level. The maximum throughput reduces gradually when the number of hidden node pairs in the network is increased. With 11% of hidden nodes in the network the peak throughput falls to 0.6.

Original languageEnglish
Pages (from-to)41-50
Number of pages10
JournalWireless Personal Communications
Issue number1
Publication statusPublished - 1997
Externally publishedYes


  • Hidden nodes
  • MAC protocol
  • Wireless LANs


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