Wi-Fi in Ad Hoc Mode: A Measurement Study

  • Authors:
  • Giuseppe Anastasi;Eleonora Borgia;Marco Conti;Enrico Gregori

  • Affiliations:
  • -;-;-;-

  • Venue:
  • PERCOM '04 Proceedings of the Second IEEE International Conference on Pervasive Computing and Communications (PerCom'04)
  • Year:
  • 2004

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Abstract

In this paper we investigate the performance of IEEE802.11b ad hoc networks by means of an experimentalstudy. This analysis reveals several aspects that areusually neglected in simulation studies. Firstly, sincedifferent transmission rates are used for control and dataframes, different transmission ranges and carrier-sensingranges may exist at the same time in the network. Inaddition, the transmission ranges are in practice muchshorter than usually assumed in simulation analysis, notconstant but highly variable (even in the same session)and depends on several factors (i.e., mobile height,interference condition, etc.). Finally, exploiting ourperformance measurements, we present a channel modelfor an 802.11 network that indicates virtual carriersensing is generally not necessary and the RTS/CTSmechanism only introduces additional overhead.