ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,554,005, issued on Feb. 17, was assigned to Marvell Asia Pte Ltd (Singapore).
"Null data packet announcement frame for NDP ranging" was invented by Liwen Chu (San Ramon, Calif.), Hongyuan Zhang (Fremont, Calif.) and Hui-Ling Lou (Sunnyvale, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A first communication device generates a null data packet announcement (NDPA) frame for use in a ranging measurement exchange session with a second communication device. The NDPA frame includes a station information field corresponding to the second communication device, the station information field having i) an 11-bit association identifier (AID) subfield that i...