WLAN sensing using high-efficiency (HE) trigger-based (TB) PPDUs (HE TB PPDUs)
US11924923B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2022 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Aug 15, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An access point (AP) configured for wireless local area network (WLAN) sensing is configured to encode a trigger frame (TF) for transmission. The trigger frame allocates resource units (RUs) for receiving high-efficiency (HE) trigger-based (TB) physical-layer protocol data units (PPDUs) (HE TB PPDUs) from a plurality of client devices (non-AP STAs). The trigger frame may solicit each of the client devices to transmit an HE TB PPDU in accordance with an UL OFDMA technique or an UL MU-MIMO technique. The AP may decode the HE TB PPDUs received from the client devices and may estimate channel state information (CSI) for a radio link associated with each of the client devices based on an HE-LTF of an associated one of the HE-TB PPDUs received from one of the client devices. In accordance with these embodiments, the AP may process changes in the CSI of the radio links over time for a WLAN sensing application.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.