Patent ID: 9344982
Filing Date: 2016-05-17
CPC Classification: H04W

Claim Text:
1. A method for time synchronization by WiFi-direct, comprising steps of: acquiring, by a master device, information on standard date and time from a base station for time synchronization; establishing a WiFi-direct connection between the master device and a slave device; acquiring, by the slave device, the information on the standard date and time actively or passively from the master device through the WiFi-direct connection; and acquiring, by the salve device, actual standard date and time by adding a transmission delay to the standard date and time, and setting local system date and time as the actual standard date and time, wherein information interaction between the master device and the slave device is based on a request-response mode, and the transmission delay is acquired by: calculating a difference between time of receiving a response to a request and time of sending the request; and then dividing the difference by 2.