ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,913, issued on May 20, was assigned to Apple Inc. (Cupertino, Calif.).

"Port selection codebook enhancement" was invented by Haitong Sun (Cupertino, Calif.), Chunhai Yao (Beijing), Chunxuan Ye (San Diego), Dawei Zhang (Saratoga, Calif.), Hong He (San Jose, Calif.), Wei Zeng (Saratoga, Calif.) and Yushu Zhang (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "Apparatus and methods are provided for port selection codebook configuration. A user equipment (UE) may decode a channel state information (CSI) report configuration (CSI-ReportConfig) from a base station. The CSI-ReportConfig indicates up to L CSI reference signal (CSI-RS) ports for select...