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An Investigation of the Modified PCF under Hidden Station Problem

Publiceringsår: 2004
Språk: Engelska
Publikation/Tidskrift/Serie: [Host publication title missing]
Dokumenttyp: Konferensbidrag


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A performance investigation of the modified PCF under hidden station problem

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This paper appears in:

Communications, Circuits and Systems, 2004. ICCCAS 2004. 2004 International Conference on

Date of Conference: 27-29 June 2004

Author(s): Kanjanavapastit, A.

Sch. of Electr. Eng. & Telecommun., New South Wales Univ., Sydney, NSW, Australia

Landfeldt, B.

Volume: 1

Page(s): 428 - 432 Vol.1

Product Type: Conference Publications

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A modified version of the point coordination function (PCF) in the IEEE 802.11 standard, called the modified PCF, has been introduced to improve the channel utilization over the standard PCF. The modified PCF is a hybrid scheme incorporating polling and channel sensing. Therefore, a collision might occur in the channel if some stations cannot sense the change of channel status in case there is a station transmitting a packet, the so-called hidden station problem. We present an investigation into the effect of the hidden station problem on the performance of the modified PCF and propose a new collision resolution technique, which presumes a hidden station and then drops the station into a list of hidden stations. Simulation results show that the hidden station problem increases the overall delay of the system in the uplink. However, using the proposed collision resolution technique, the delay can be effectively reduced.


  • Electrical Engineering, Electronic Engineering, Information Engineering


International Conference on Communications, Circuits and Systems, ICCCAS 2004.
  • ISBN: 0-7803-8647-7

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