US 2020/0007373 A1 · WIRELESS DEVICE LOW POWER WAKE UP

Abstract

A wireless device generates a Legacy preamble, a 20 MHz Orthogonal Frequency Division Multiplexing (OFDM) symbol, and a Wake-Up (WU) signal portion. The Legacy Preamble includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF) and a Legacy Signal (L-SIG) field. The 20 MHz OFDM symbol has a duration of 4 μs. The WU signal portion has a frequency bandwidth that is narrower than a frequency bandwidth of the Legacy preamble. The wireless device transmits a frame, which includes transmitting the Legacy preamble, transmitting the 20 MHz OFDM symbol immediately after transmitting the Legacy preamble, and transmitting the WU signal portion immediately after transmitting the 20 MHz OFDM symbol.

Claims1

Dependent claims

A method performed by a wireless device, the method comprising:

generating a Legacy preamble having a first bandwidth, the Legacy preamble including a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF) and a Legacy Signal (L-SIG) field;
generating a Wake-Up (WU) signal portion having a second bandwidth that is less than and inside the first bandwidth;
and
transmitting a frame including the legacy preamble and the WU signal portion, transmitting the frame including:
transmitting, using the first bandwidth, the Legacy preamble, including transmitting the L-SIG field at a first power level, and
transmitting, using the second bandwidth, the WU signal portion after transmitting the Legacy preamble and at a second power level higher than the first power level.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/565,301Filed 9 Sep 2019

Priority

2 Aug 2016

Published

2 Jan 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04L 27/2627
Arrangements specific to the transmitter only: modulators
H04L 27/2602
Multicarrier modulation systems: signal structure
H04L 27/2603
Signal structure: signal structure ensuring backward compatibility with legacy system
H04L 27/2607
Symbol extensions, e.g. Zero Tail, Unique Word [UW]: cyclic extensions

Family

Application62/370,145Us provisional application · filed 2 Aug 2016

Application62/371,095Us provisional application · filed 4 Aug 2016

Application15/667,574Continuation · filed 2 Aug 2017

Application16/134,728Continuation · filed 18 Sep 2018

Application16/565,301Continuation

US 10,129,064 B1Related patent

US 10,454,738 B2Related patent

US 10,819,548 B2Related patent

US 2019/0036754 A1Published application

US 2020/0007373 A1This patent

From the US filing history. Foreign family members aren’t listed.

Wireless device low power wake up

Life of this patent

Wireless device low power wake up

Life of this patent

Abstract

Claims1