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Method and apparatus for supporting wideband and multiple bandwidth transmission protocols

  • US 9,369,918 B2
  • Filed: 06/21/2012
  • Issued: 06/14/2016
  • Est. Priority Date: 06/24/2011
  • Status: Active Grant
First Claim
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1. A method for use in a first wireless transmit/receive unit (WTRU), the method comprising:

  • maintaining a network allocation vector (NAV);

    receiving a contention free (CF)-End frame from a second WTRU, wherein the CF-End frame includes a duration field and a basic service set identifier (BSSID) field indicating a medium access control (MAC) address associated with an access point (AP), wherein the BSSID field includes an individual/group bit; and

    on a condition that the individual/group bit of the BSSID field has a value of one (1), determining that a scrambling sequence of the CF-End frame indicates a bandwidth associated with a transmit opportunity (TXOP) being truncated by the second WTRU and resetting the NAV.

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