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Collision avoidance in IEEE 802.11 contention free period (CFP) with overlapping basic service sets (BSSs)

  • US 7,054,329 B2
  • Filed: 06/30/2001
  • Issued: 05/30/2006
  • Est. Priority Date: 07/07/2000
  • Status: Expired due to Fees
First Claim
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1. A medium access control (MAC) protocol for avoiding collisions from stations (STAs) comprising two or more IEEE 802.11 basic service sets (BSSs) collocated and operating in the same channel during contention free periods (CFPs), comprising:

  • a network allocation vector (NAV);

    means for utilizing ready-to-send—

    (RTS)/clear-to-send(CTS) exchange during CFPs to avoid potential collision from STAs in overlapping BSSs; and

    means for providing overlapping network allocation vectors (ONAV) in addition to the network allocation vector (NAV) for processing by the means for utilizing.

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