Effective Static and Adaptive Carrier Sensing for Dense Wireless CSMA Networks

Chi Kin Chau, Wang Hei Ho, Zhenhui Situ, Soung Chang Liew, Jialiang Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)


The increasingly dense deployments of wireless CSMA networks arising from applications of Internet-of-things call for an improvement to mitigate the interference among simultaneous transmitting wireless devices. For cost efficiency and backward compatibility with legacy transceiver hardware, a simple approach to address interference is by appropriately configuring the carrier sensing thresholds in wireless CSMA protocols, particularly in dense wireless networks. Most prior studies of the configuration of carrier sensing thresholds are based on a simplified conflict graph model, whereas this paper considers a realistic signal-to-interference-and-noise ratio model. We provide a comprehensive study for two effective wireless CSMA protocols: Cumulative-interference-Power Carrier Sensing and Incremental-interference-Power Carrier Sensing, in two aspects: (1) static approach that sets a universal carrier sensing threshold to ensure interference-safe transmissions regardless of network topology, and (2) adaptive approach that adjusts the carrier sensing thresholds dynamically based on the feedback of nearby transmissions. We also provide simulation studies to evaluate the starvation ratio, fairness, and goodput of our approaches.
Original languageEnglish
Article number7457703
Pages (from-to)355-366
Number of pages12
JournalIEEE Transactions on Mobile Computing
Issue number2
Publication statusPublished - 1 Feb 2017


  • carrier sensing
  • CSMA
  • hidden node problem
  • IEEE 802.11
  • IEEE 802.15
  • SINR model
  • WiFi

ASJC Scopus subject areas

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


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