Multiband scheduling for wake up radio

A method of providing a wake-up signal in a communications channel for a plurality of receiving stations, comprising:

• generating at least a first series and a second series of waveform coded symbols, the first series being incorporated into a first wake-up-radio (WUR) frame that is intended for a first receiving station and has a first predefined bandwidth, the second series being incorporated into a second WUR frame that is intended for a second receiving station and has a second predefined bandwidth;
• combining the first and second WUR frames into a multiband WUR data unit having a bandwidth that is greater than a sum of the predefined bandwidths of the first and second WUR frames;
• and
• transmitting a wake-up signal including the multiband WUR data unit in the communications channel,
• wherein each waveform coded symbol in the first series is generated from applying waveform coding in time domain to a first orthogonal frequency division multiplexing (OFDM) waveform for which all subcarriers outside of the first predefined bandwidth have been set to zero;
• and
• wherein each waveform coded symbol in the second series is generated from applying waveform coding in time domain to a second OFDM waveform for which all subcarriers outside of the second predefined bandwidth have been set to zero,
• the method further comprising upconverting the multiband WUR data unit to provide the wake-up signal.

A method of providing a wake-up signal in a communications channel for a plurality of receiving stations, comprising:

• generating at least a first series and a second series of waveform coded symbols, the first series being incorporated into a first wake-up-radio (WUR) frame that is intended for a first receiving station and has a first predefined bandwidth, the second series being incorporated into a second WUR frame that is intended for a second receiving station and has a second predefined bandwidth;
• combining the first and second WUR frames into a multiband WUR data unit having a bandwidth that is greater than a sum of the predefined bandwidths of the first and second WUR frames;
• and
• transmitting a wake-up signal including the multiband WUR data unit in the communications channel,
• wherein each of the waveform coded symbols represents a respective data bit and comprises a guard interval followed by first and second sub-symbols of equal duration, the corresponding data bit being represented by a different relative energy distribution between the first and second sub-symbols.

A method of providing a wake-up signal in a communications channel for a plurality of receiving stations, comprising:

• generating at least a first series and a second series of waveform coded symbols, the first series being incorporated into a first wake-up-radio (WUR) frame that is intended for a first receiving station and has a first predefined bandwidth, the second series being incorporated into a second WUR frame that is intended for a second receiving station and has a second predefined bandwidth;
• combining the first and second WUR frames into a multiband WUR data unit having a bandwidth that is greater than a sum of the predefined bandwidths of the first and second WUR frames;
• transmitting a wake-up signal including the multiband WUR data unit in the communications channel, and
• generating at least a third series and a fourth series of waveform coded symbols, the third series being incorporated into a third wake-up-radio (WUR) frame that is intended for a first receiving station and has a third predefined bandwidth, the fourth series being incorporated into a fourth WUR frame that is intended for a fourth receiving station and has a second predefined bandwidth;
• and
• wherein the third and fourth WUR frames are combined with the first and second WUR frames into the multiband WUR data unit included in the wake-up signal.

A transmitter for transmitting a wake-up signal in a communications channel, comprising:

• a waveform coding module configured to generate a multiband wake-up-radio (WUR) data unit including a first WUR frame that incorporates a first series of waveform coded symbols and occupies a first predefined bandwidth within a bandwidth of the multiband WUR data unit, and a second WUR frame that incorporates a second series of waveform coded symbols and occupies a second defined bandwidth within the bandwidth of the multiband WUR data unit, the bandwidth of the WUR data unit being greater than a sum of the predefined bandwidths of the first and second WUR frames;
• and
• a modulator for up-converting the multiband WUR data unit onto a carrier frequency and transmitting a wake-up signal including the multiband WUR data unit in the communications channel,
• wherein the waveform coding module is configured to combine the first and second WUR frames into the multiband WUR data unit in a synchronized sample-by-sample manner using a sampling rate that is the same as a sampling rate used for the waveform coded symbols of the first and second WUR frames.

A transmitter for transmitting a wake-up signal in a communications channel, comprising:

• a waveform coding module configured to generate a multiband wake-up-radio (WUR) data unit including a first WUR frame that incorporates a first series of waveform coded symbols and occupies a first predefined bandwidth within a bandwidth of the multiband WUR data unit, and a second WUR frame that incorporates a second series of waveform coded symbols and occupies a second defined bandwidth within the bandwidth of the multiband WUR data unit, the bandwidth of the WUR data unit being greater than a sum of the predefined bandwidths of the first and second WUR frames;
• and
• a modulator for up-converting the multiband WUR data unit onto a carrier frequency and transmitting a wake-up signal including the multiband WUR data unit in the communications channel,
• wherein each of the waveform coded symbols represents a respective data bit and comprises a guard interval followed by first and second sub-symbols of equal duration, the corresponding data bit being represented by a different relative energy distribution between the first and second sub-symbols.