Patent attributes
A communication device generates a first portion of a wakeup packet that corresponds to a legacy physical layer protocol (PHY) preamble, and includes a first orthogonal frequency division multiplexing (OFDM) symbol that spans a first bandwidth and is modulated according to a modulation scheme. The communication device scrambles a plurality of information bits to generate scrambled information bits, and generates a second OFDM symbol to include the scrambled information bits. The second OFDM symbol spans the first bandwidth and is modulated according to the modulation scheme to signal to other communication devices that the wakeup packet does not conform to a communication protocol. The first communication device generates a second portion of the wakeup packet, which corresponds to a second bandwidth that is less than the first bandwidth. The communication device transmits the second OFDM symbol between the first portion of the wakeup packet and the second portion of the wakeup packet.
