| 摘要 |
PURPOSE: A time information sharing method using a Bluetooth is provided to enable each electronic device to correct its own time information to a standard time upon receiving information on the standard time from a mobile phone. CONSTITUTION: A Bluetooth mounted in a computer searches a Bluetooth of a mobile phone and establishes connection thereto(S1). The computer requests time information from the mobile phone by using a time setting application program(S2). The computer checks receiving of a time information response packet and extracts time information that has been recorded in its time information column and transmitted(S3,S4). The computer detects a reciprocation delay time of a time information request packet by subtracting the extracted time from its current time, and estimates a half the reciprocation delay time as a uni-directional packet transmission delay time(S5). The computer obtains a current standard time by adding the uni-directional packet transmission delay time to the time information recorded in the remote time information column on the time information response packet, and corrects its current time to the standard time(S6,S7).
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