METHOD AND SYSTEM FOR PADDING AND PACKET EXTENSION FOR DOWNLINK MULTIUSER TRANSMISSION

摘要

An transmission apparatus of the present disclosure comprises a transmission signal generator which, in operation, generates a transmission signal that includes a legacy preamble, a nonlegacy preamble, a data field and a packet extension field, wherein the non-legacy preamble comprises a first signal field and a second signal field, the second signal field comprising a common field that carries RU assignment information for one or more terminal stations and a user-specific field that carries per-user allocation information for the one or more terminal stations, wherein the one or more terminal stations are grouped into a single group or two group, and wherein in case that the one or more terminal stations are grouped into a first group and a second group, the first group comprises at least one terminal station that has FEC encoded bits spanned over all of the OFDM symbols in the data field while the second group comprises one or more terminal stations that have FEC encoded bits spanned over only a part of the OFDM symbols in the data field; and a transmitter which, in operation, transmits the generated transmission signal.