New Adaptive 802.11 MAC Protocol to Enhance Throughput and Fairness in Multihop Wireless Networks

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Multihop Wireless Networks (MWNs) suffer from contention over the medium between nodes, resulting in a decrease of end-to-end throughput. Also, nodes with multiple hops away from the gateway experience additional throughput degradation caused by high collisions from competing nodes, resulting in more packet loss. It has been shown that packets' fragmentation at the (Medium Access Control) MAC layer plays an important role in improving nodes' throughput. Inspired by this idea, we propose an algorithm to estimate more suitable fragmentation threshold for various nodes in the network based on their locality. Although various fragmentation thresholds achieve better end-to-end throughput, it does not improve the fairness problem in such networks. To address the fairness problem, we propose changing also the transmission rates to nodes across the network. In this work, we propose a new scheme called Adaptive Transmission Rate and Fragmentation Size (ARFS) that can be implemented on top of the 802.11 MAC protocol. ARFS computes the collision probability of each node based on its interfering range and its distance from the gateway. It then uses these values as weights to compute new fragmentation threshold and transmission rate of each node in the MWN. We show that ARFS significantly outperforms the standard 802.11 MAC protocol in regarding fairness and end-to-end throughput.

Original languageEnglish (US)
Title of host publication2021 International Wireless Communications and Mobile Computing, IWCMC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1908-1913
Number of pages6
ISBN (Electronic)9781728186160
DOIs
StatePublished - 2021
Event17th IEEE International Wireless Communications and Mobile Computing, IWCMC 2021 - Virtual, Online, China
Duration: Jun 28 2021Jul 2 2021

Publication series

Name2021 International Wireless Communications and Mobile Computing, IWCMC 2021

Conference

Conference17th IEEE International Wireless Communications and Mobile Computing, IWCMC 2021
Country/TerritoryChina
CityVirtual, Online
Period6/28/217/2/21

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Signal Processing
  • Information Systems and Management
  • Safety, Risk, Reliability and Quality

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