ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,556,434, issued on Feb. 17, was assigned to Apple Inc. (Cupertino, Calif.).

"Uplink sounding reference signal (SRS) transmission in carrier aggregation system" was invented by Hong He (Sunnyvale, Calif.), Gang Xiong (Portland, Ore.), Seunghee Han (San Jose, Calif.), Hwan-Joon Kwon (Portland, Ore.) and Alexei Davydov (Nizhny Novgorod, Russia).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus can receive or transmit parameters for a sounding reference signal (SRS) transmission configuration as an uplink (UL)/downlink (DL) configuration of a serving cell. A time division duplex (TDD) operation with a plurality of component carriers (CCs) can be en...