Patent ID: 9191294
Filing Date: 2015-11-17
Classification: H04L

Abstract:
1. A master device for calculating a synchronized actuation time for an N number of slave devices (N being an integer greater than or equal to 2), the master device comprising: a transmitting part configured to transmit a request message a K number of times (K being an integer greater than or equal to 2) to each of the N number of slave devices, wherein the request message includes an actuation command and information on a time point when the request message was transmitted; a receiving part configured to receive a reply message from each of the N number of slave devices, wherein the reply message includes information on a K number of end-to-end delay times, and an i-th end-to-end delay time from among the K end-to-end delay times corresponds to a difference between a time point when an i-th request message from among the request messages transmitted a K number of times was transmitted and a time point when the slave device was actuated by the i-th request message; and an absolute-time calculating part configured to calculate an absolute time for concurrently actuating the N number of slave devices by using the information on the K number of end-to-end delay times received from each of the N number of slave devices.