A fixed backoff-time switching method for CSMA/CA protocol in wireless mesh networks

Sritrusta Sukaridhoto, Nobuo Funabiki, Toru Nakanishi, Kan Watanabe, Shigeto Tajima

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


As a flexible and cost-efficient scalable Internet access network, we studied architectures, protocols, and design optimizations of the Wireless Internet-access Mesh NETwork (WIMNET). WIMNET is composed of multiple access points (APs) connected through multihop wireless communications on IEEE 802.11 standards. The increasing popularity of real-time applications such as IP-phones and IP-TV means that they should be supported in WIMNET. However, the contention resolution mechanism using a random backoff-time in the CSMA/CA protocol of 802.11 standards is not sufficient for handling real-time traffic in multihop wireless communications. In this paper, we propose a Fixed Backoff-time Switching (FBS) method for the CSMA/CA protocol to improve the real-time traffic performance in WIMNET by giving the necessary activation chances to each link. We implement our proposal on the QualNet simulator, and verify its effectiveness through simulations on three network topologies with four scenarios.

Original languageEnglish
Pages (from-to)1019-1029
Number of pages11
JournalIEICE Transactions on Communications
Issue number4
Publication statusPublished - Apr 2013


  • CSMA/CA protocol
  • Fixed backoff-time switching (FBS)
  • QualNet
  • Real-time application
  • Wireless mesh network

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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