ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,483,310, issued on Nov. 25, was assigned to Huawei Technologies'Co.'Ltd.' (Shenzhen, China).

"Null data packet announcement (NDPA) frame indication" was invented by Jung Hoon Suh (Kanata, Canada), Yan Xin (Kanata, Canada), Osama Aboul-Magd (Kanata, Canada) and Kwok Shum Au (Kanata, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method includes sending, by an access point (AP) to one or more stations (STAs), a request for channel state information (CSI). The request includes a null data packet announcement (NDPA) frame including a common information field. The common information field including an indicator of whether trigger based (TB) sounding...