Method and apparatus for transmitting and receiving a frame supporting a short MAC header in wireless LAN system

  • US 9,843,558 B2
  • Filed: 10/07/2013
  • Issued: 12/12/2017
  • Est. Priority Date: 10/12/2012
  • Status: Active Grant
First Claim
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1. A method for managing a sequence number in a wireless LAN (WLAN) system, comprising:

  • receiving, by a second station (STA), a frame including a compressed MAC header from a first STA; and

    checking, by the second STA, a corresponding cache to determine whether the frame is a duplicated frame,wherein the compressed MAC header includes a receiver address (RA) field, a transmitter address (TA) field and a sequence control field,wherein the sequence control field includes a sequence number value for the frame,wherein when the frame is an uplink (UL) frame the TA field includes an associated identifier (AID) value,wherein when the frame is a downlink (DL) frame the RA field includes the AID value,wherein when the TA field includes the AID value, the corresponding cache is checked based on a STA MAC address identified by the AID value and the sequence number value, andwherein when the frame is determined to be the duplicated frame, the STA MAC address identified by the AID value and the sequence number value contained in the compressed MAC header are respectively identical to an STA MAC address and a sequence number value of the corresponding cache.

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