US 12,273,835 B2
Communication device and method of operating the same
Michael Schober, Graz (AT); Frank Leong, Veldhoven (NL); and Dominik Doedlinger, Wildon (AT)
Assigned to NXP B.V., Eindhoven (NL)
Filed by NXP B.V., Eindhoven (NL)
Filed on Feb. 22, 2022, as Appl. No. 17/651,949.
Claims priority of application No. 21162461 (EP), filed on Mar. 12, 2021.
Prior Publication US 2022/0295430 A1, Sep. 15, 2022
Int. Cl. H04W 56/00 (2009.01); H04W 12/122 (2021.01)
CPC H04W 56/002 (2013.01) [H04W 56/0055 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A communication device, comprising:
a communication unit configured to execute a time-of-flight ranging session with an external communication counterpart;
a clock offset measurement unit configured to measure a frequency offset of a device clock, wherein the device clock is configured to be used by the communication unit when the ranging session is executed; and
a processing unit configured
to determine whether the measured frequency offset of the device clock has a predefined correlation with a frequency offset of a counterpart clock, wherein the counterpart clock is configured to be used by the external communication counterpart when the ranging session is executed, and
to determine whether the measured frequency offset of the device clock has a further predefined correlation with a predetermined clock offset between the device clock and a reference clock and a predetermined clock offset between the counterpart clock and the reference clock, wherein the further predefined correlation is that the product of the measured frequency offset of the device clock and the predetermined clock offset between the device clock and the reference clock is equal to the predetermined clock offset between the counterpart clock and the reference clock within a given tolerance range.