Experimental investigation of PHY layer rate control and frequency selection in 802.11-based ad-hoc networks

Zhibin Wu, Sachin Ganu, Ivan Seskar, D. Raychaudhuri

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

8 Scopus citations

Abstract

This paper presents an experimental investigation of the performance impact of two important PHY layer design options that arise in 802.11 ad-hoc networks. In particular, throughput results are provided for multi-hop ad-hoc networks with and without PHY auto-rate control and for single vs. multiple frequencies. The study is motivated by the fact that default 802.11-based ad-hoc networks using commercially preset auto-rate PHY and a single frequency channel suffer from performance degradations caused by link quality fluctuations and MAC layer self-interference respectively. A baseline ad-hoc network scenario is set up on the ORBIT radio grid testbed at Rutgers and is used to determine end-to-end multi-hop flow throughput with default rate control and single channel operation. These results are then compared with those obtained with multiple channels and alternative PHY-rate selection methods demonstrating the potential for significant performance improvements. We observed significant improvements in end-to-end flow throughput, as much as ∼4x for multiple channel vs. single channel and ∼3x for optimally controlled PHY rate vs auto-rate.

Original languageEnglish (US)
Title of host publicationProceedings of the ACM SIGCOMM 2005 Workshop on Experimental Approaches to Wireless Network Design and Analysis, E-WIND 2005
Pages41-45
Number of pages5
DOIs
StatePublished - 2005
EventACM SIGCOMM 2005 Workshop on Experimental Approaches to Wireless Network Design and Analysis, E-WIND 2005 - Philadelphia, PA, United States
Duration: Aug 22 2005Aug 22 2005

Publication series

NameProceedings of the ACM SIGCOMM 2005 Workshop on Experimental Approaches to Wireless Network Design and Analysis, E-WIND 2005

Other

OtherACM SIGCOMM 2005 Workshop on Experimental Approaches to Wireless Network Design and Analysis, E-WIND 2005
Country/TerritoryUnited States
CityPhiladelphia, PA
Period8/22/058/22/05

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications

Keywords

  • ad-hoc networks
  • experimental evaluation
  • multi-hop networks

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