ALEXANDRIA, Va., June 18 -- United States Patent no. 12,328,742, issued on June 10, was assigned to NEC Corp. (Tokyo).
"Communication system" was invented by Diptendu Mitra (Singapore) and Yassin Aden Awad (London).
According to the abstract* released by the U.S. Patent & Trademark Office: "A communications system is described in which user devices are allocated sub-carriers on which to transmit uplink data to a base station. ACK/NACK messages for the data transmitted on the uplink are then transmitted by the base station on sub-carriers that depend on the sub-carriers used to carry the uplink data. A direct mapping function is preferably used to determine the sub-carriers to be used for the ACK/NACK messages from the uplink sub-carriers....