US 11,700,105 B2
Infrastructure equipment, communications devices and methods for compensating for frequency drift of an oscillator of a communications device
Martin Warwick Beale, Basingstoke (GB); Shin Horng Wong, Basingstok (GB); and Basuki Priyanto, Lund (SE)
Assigned to SONY GROUP CORPORATION, Tokyo (JP); and SONY MOBILE COMMUNICATIONS INC., Tokyo (JP)
Filed by Sony Group Corporation, Tokyo (JP); and Sony Mobile Communications, Inc., Tokyo (JP)
Filed on May 3, 2021, as Appl. No. 17/246,825.
Application 17/246,825 is a continuation of application No. 15/654,611, filed on Jul. 19, 2017, granted, now 10,999,043.
Application 15/654,611 is a continuation of application No. PCT/EP2017/055581, filed on Mar. 9, 2017.
Claims priority of application No. 16160533 (EP), filed on Mar. 15, 2016; application No. 16163943 (EP), filed on Apr. 5, 2016; and application No. 16171552 (EP), filed on May 26, 2016.
Prior Publication US 2021/0258128 A1, Aug. 19, 2021
Int. Cl. H04L 5/00 (2006.01); H04L 27/00 (2006.01); H04W 72/20 (2023.01); H04W 48/10 (2009.01); H04L 1/1607 (2023.01); H04L 1/1812 (2023.01)
CPC H04L 5/0064 (2013.01) [H04L 5/0096 (2013.01); H04L 27/0012 (2013.01); H04W 48/10 (2013.01); H04W 72/20 (2023.01); H04L 1/1607 (2013.01); H04L 1/1812 (2013.01); H04L 5/0023 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An infrastructure equipment forming part of a mobile communications network configured to transmit signals to and receive signals from one or more communications devices, the infrastructure equipment comprising,
a receiver configured to receive signals on the uplink from the one or more communications devices via a wireless access interface of the mobile communications network,
a transmitter configured to transmit signals on the downlink to the one or more communications devices via the wireless access interface, and
a controller configured to control the receiver to receive the signals and to control the transmitter to transmit the signals, wherein the controller is configured in combination with the receiver and the transmitter
to measure a frequency error of signals received from one of the communications devices, the frequency error being an amount by which a carrier frequency of the received signals differs from a predetermined frequency,
to transmit, in one or more temporal periods, during which reception of the signals transmitted by and received from the one of the communications devices is paused, a frequency correction signal to the one of the communications devices, the frequency correction signal providing an indication of a correction to compensate for the measured frequency error, and
to transmit the frequency correction signal on a downlink control channel,
wherein the frequency correction signal is a frequency correction command comprising a single bit indicating whether the output frequency of the one of the communications devices is greater or less than the predetermined frequency.