US 12,238,766 B2
Devices and methods for low power adaptive channel sensing
Manuj Mukherjee, Paris (FR); Aslan Tchamkerten, Verrieres le Buisson (FR); and Chadi Jabbour, Paris (FR)
Assigned to INSTITUT MINES TELECOM, Palaiseau (FR)
Appl. No. 17/787,301
Filed by INSTITUT MINES TELECOM, Palaiseau (FR)
PCT Filed Dec. 11, 2020, PCT No. PCT/EP2020/085695
§ 371(c)(1), (2) Date Jun. 18, 2022,
PCT Pub. No. WO2021/130030, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 19306766 (EP), filed on Dec. 24, 2019.
Prior Publication US 2023/0030851 A1, Feb. 2, 2023
Int. Cl. H04W 74/08 (2024.01); H04W 74/0808 (2024.01)
CPC H04W 74/0808 (2013.01) 11 Claims
OG exemplary drawing
 
1. A channel sensing device, implemented in a wireless receiver in a wireless system, for detecting a presence of a preamble transmitted by a wireless transmitter over a wireless transmission channel in said wireless system, the channel sensing device being configured to detect the presence of the preamble by observing a channel sensing sequence of a given length smaller than or equal to a maximum given length, said channel sensing sequence comprising one or more samples, wherein the channel sensing device:
receives input parameters comprising a target reliability metric, a receiver noise profile, said maximum given length, a received power, and a probability of a presence of a preamble;
determines channel sensing parameters given said input parameters and according to the minimization of the average energy consumption per given length, said channel sensing parameters comprising a number of channel sensing phases, and a number of samples, a receiver power consumption value, and a preamble detection threshold corresponding to each of said channel sensing phases;
performs a first channel sensing phase comprising:
observing a batch of samples of said one or more samples by consuming the receiver power consumption value corresponding to the first channel sensing phase, said batch of samples comprising a number of samples equal to the number of samples corresponding to the first channel sensing phase;
applying a hypothesis test comprising the comparison of a value derived from the observed samples with the preamble detection threshold corresponding to the first channel sensing phase;
deciding on the presence of a preamble or on performing a subsequent channel sensing phase depending on said comparison and/or whether the number of channel sensing phases is greater than one; and
a subsequent channel sensing phase comprising:
observing a batch of samples of said one or more samples by consuming the receiver power consumption value corresponding to said channel sensing phase, said batch of samples comprising a number of samples equal to the number of samples corresponding to said channel sensing phase;
applying a hypothesis test comprising the comparison of a value derived from all of the so far observed samples with the preamble detection threshold corresponding to said channel sensing phase;
deciding on the presence of a preamble or on performing a subsequent channel sensing phase based on said comparison and/or on a condition related to a number of performed channel sensing phases compared with said number of channel sensing phases.