Centralized Random Backoff for Collision Resolution in Wi-Fi Networks

Research output: Contribution to journalArticlepeer-review


Wi-Fi devices operate following the 802.11 DCF (Distributed Coordination Function) in order to fairly use the channel that the devices share. However, the throughput performance of the Wi-Fi networks is known to be degraded due to packet collisions. So, we propose a novel multiple access protocol, called centralized random backoff (CRB) for collision free Wi-Fi networks. In CRB, after a successful reception of a data frame from a station, the AP allocates a unique backoff state to the station by means of the ACK frame. We evaluate its performance by comparing to that of a deterministic backoff mechanism. Evaluation results show that CRB significantly improves the throughput performance by reducing collisions, and it allows a larger number of nodes to operate in a collision free state without dynamic parameter adjustment.
Original languageEnglish
Pages (from-to)5838 - 5852
JournalIEEE Transactions on Wireless Communications
Early online date21 Jun 2017
Publication statusPublished - 21 Jun 2017


  • Medium access control
  • MAC protocol
  • Random access
  • Distributed access
  • Distributed Coordination Function
  • Random backoff
  • Collision resolution
  • Fairness

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