ALEXANDRIA, Va., June 9 -- United States Patent no. 12,289,765, issued on April 29, was assigned to BEIJING XIAOMI MOBILE SOFTWARE Co. LTD. (Beijing).

"Access feedback method, base station, terminal, and storage medium" was invented by Wei Hong (Beijing), Yajun Zhu (Beijing), Tong Sha (Beijing) and Yong Li (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method, device, and non-transitory computer-readable storage medium are provided. The method may be applied to a base station. The base station may receive a random access preamble, transmitted by a terminal through an unlicensed band. The base station may occupy, in a first time window, a first control channel in the unlicensed band through a Liste...