TECHNIQUES FOR SIGNAL EXTENSION SIGNALING

摘要

Various aspects are provided related to techniques for signal extension (SE) signaling. A signal extension (SE) duration for a data unit can be identified from a set of at least three possible SE durations. A single signaling bit in the data unit can be used to indicate the identified SE duration from the set of at least three possible SE durations to a receiver of the data unit. Problem to be solved: Signalling of Signal Extension (SE) length used by an Access Point in Downlink of a IEEE 802.11ax. SE also called Frame Extension or Packet Extension are dummy bits padded at the end of a frame or PPDU that give a terminal (STA) more time to respond on top of the 16us SIFS duration. The length of the Symbol Extension is implicitly signalled through the Length field (L_LENGTH) in the legacy signal field (L-SIG). However due to the quantization noise of the L_LENGTH field, an ambiguity remains for some SE durations that prevents the STA from uniquely determining from the received L_LENGTH the number of data symbols and the SE length. For these reasons, the present application proposes to send a so-called SE disambiguation bit by indicating to which subset of SE lengths, the used SE belongs to.