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Method and apparatus for supporting wideband and multiple bandwidth transmission protocols

  • US 9,844,075 B2
  • Filed: 06/13/2016
  • Issued: 12/12/2017
  • 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:

  • generating a contention free (CF)-End frame that 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;

    on a condition that a transmit opportunity (TXOP) is being truncated, setting the individual/group bit of the BSSID field to a value of one (1), and setting a scrambling sequence associated with the CF-End frame to indicate a bandwidth associated with the TXOP being truncated by the first WTRU; and

    transmitting the CF-End frame to enable a second WTRU receiving the CF-End frame to set a network allocation vector (NAV).

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