Patent ID: 9397916
Filing Date: 2016-07-19
CPC Classification: H04J,H04L

Claim Text:
1. A communication device comprising: a clock to measure time; communication circuitry to transmit a request signal to the other communication device in a certain cycle, and to receive a response signal that is transmitted in response to the request signal, from the other communication device; processing circuitry to: change a transmission timing of the request signal; compare first round-trip delay time with second round-trip delay time, if a result of comparison by the processing circuitry shows that the second round-trip delay time is shorter than the first round-trip delay time, adjust the time measured by the clock using a transmission time point of the second request signal and the reception time point of the second request signal in the other communication device, and the transmission time point of the second response signal from the other communication device and a reception time point of the second response signal.