ALEXANDRIA, Va., July 21 -- United States Patent no. 12,690,091, issued on July 21, was assigned to Lenovo (Beijing) Ltd. (Beijing).

"Signaling radio bearer (SRB) transmission using small data transmission (SDT)" was invented by Mingzeng Dai (Shanghai), Ran Yue (Beijing), Lianhai Wu (Beijing) and Jie Shi (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods and apparatus of Signaling Radio Bearer (SRB) transmission using Small Data Transmission (SDT) are disclosed. The method includes: a base station receiving, from UE in RRC_INACTIVE or RRC_IDLE state, a small data packet, wherein the small data packet includes an SRB (Signaling Radio Bearer); sending a retrieve UE context request to a last servin...