Patent ID: 8891716

Claim:
A node device comprising: a processor configured to measure a clock time; a wireless RF circuit configured to receive a clock time information frame, which is a frame that contains clock time information used for correcting the clock time; a memory configured to store a transmission processing time period, as a fixed value, from a point in time when a transmission source node device of the clock time information frame obtains the clock time information until a point in time when the transmission source node device transmits the clock time information frame; and a timer configured to measure a reception processing time period, which is a period of time from a point in time when the clock time information frame is received until a point in time where the clock time information is obtained from the clock time information frame, wherein the node device sets to the processor a value obtained by adding the fixed value and the reception processing time period to the clock time information so as to correct a clock time measured by the processor.