An analytic model for Throughput Optimal Distributed Coordination Function (TO-DCF)

Research output: Contribution to journalArticle


TO-DCF, a new backoff scheme for 802.11, has the potential to significantly increase throughput in dense wireless LANs while also opportunistically favouring nodes with heavier traffic loads and/or better channel conditions. In this paper we present an analytical model to investigate the behaviour and performance of the TO-DCF protocol with regards to operating parameters such as the number of nodes, the contention window size and the backoff countdown probabilities. We then compare numerical results from an implementation of our model with simulations. Our model shows a high level of accuracy, even when the model assumptions are relaxed, and provides guidance for network operators to correctly configure the weight functions for nodes running TO-DCF given the network’s operating conditions.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Telecommunications


  • 802.11, CSMA, MAC, Wireless LAN
Original languageEnglish
Pages (from-to)197-215
JournalTelecommunication Systems
Issue number2
Early online date2017 Feb 3
Publication statusPublished - 2017 Oct
Publication categoryResearch

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