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CWAP, ED question

1 posts by 1 authors in: Forums > CWDP & CWAP - Enterprise Wi-Fi Design & Analysis
Last Post: December 3, 2012:
  • By Theo_Sak
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    Hi,

    I am trying to understand if ED is affected by the reception of non-802.11 frames or not.
    Based on the CWAP study guide, page 245:
    "Interference from non-802.11 devices does NOT cause the CCA (ED) to go into a busy state".
    On the other hand, based on the "802.11 Arbitration" white paper from Marcus Burton, page 9 Physical Carier sense, paragraph 4:
    "The sensitivity threshold for RF noise, including frames whose header was not processed, as well other non-802.11 RF sources, is much lower, at -62 dBm. Thus, it takes a much stronger signal to indicate a busy medium when ED is used instead of CS".
    Which one is correct?Is ED affected by non-802.11 RF sources or not?
    Thanks in advance.


     

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