US 2025/0168887 A1 · ADAPTIVE CODE ASSIGNMENT TO AMBIENT POWER STATIONS

Abstract

Embodiments herein describe using transmission codes for ambient power stations (AMP STAs) so multiple AMP STAs can transmit in parallel to a Wi-Fi access point (AP). In order for the AMP STAs to transmit in parallel, the STAs use different codes. In one embodiment, the AMP STAs can use random timers to determine when they transmit and select a code to use during transmission. Before the timer expires, the AMP STAs can listen to see whether other AMP STAs are using the same code (e.g., a collision), and if so, select a different code. However, some AMP STAs may not have the ability to detect a collision. In that case, the AP can determine collisions for the AMP STAs and instruct the AMP STAs to select different codes.

Claims20

Dependent claims

A method comprising:

initiating, at a first ambient power station (AMP STA), a random timer upon receiving an illumination signal from an access point (AP);
selecting, at the first AMP STA and after receiving the illumination signal, a first code to use for backscatter communications transmitted to the AP;
and
upon determining a second AMP STA is using the first code for backscatter communications, selecting, at the first AMP STA, a second code to use for backscatter communications to the AP.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

18/511,336Filed 16 Nov 2023

Published

22 May 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

H04J 11/0023
Orthogonal multiplex systems, e.g. using WALSH codes: interference mitigation or co-ordination
H04W 74/0833
Non-scheduled access, e.g. ALOHA: random access procedures, e.g. with 4-step access
G06K 7/10059
The collision being resolved in the time domain, e.g. using binary tree search or RFID responses allocated to a random time slot: transponder driven
H04B 7/22
Radio transmission systems, i.e. using radiation field: scatter propagation systems , e.g. ionospheric, tropospheric or meteor scatter

Adaptive code assignment to ambient power stations

Life of this patent

Adaptive code assignment to ambient power stations

Life of this patent

Abstract

Claims20