Patent ID: 9172464
Filing Date: 2015-10-27
Classification: H04B,H04K,H04L

Abstract:
1. A handshake synchronization method for a visible light signal, comprising: connecting, by a transmitting end, in which a state machine varies with unit time, to a receiving end, and adjusting, by the receiving end, the status of a state machine of the receiving end to be synchronous with the status of the state machine of the transmitting end in the current period of time; by a processor of the transmitting end, a logical operation on an original signal and a pilot optical signal separately with a pseudocode signal of the current period of time to obtain an encrypted original signal and an encrypted pilot optical signal, combining the encrypted original signal and the encrypted pilot optical signal to obtain a scrambled signal, and sending the scrambled signal in a form of a visible light signal; and receiving, by the receiving end, the visible light signal, and converting the visible light signal into a digital signal and then performing decomposition to obtain an encrypted original signal and an encrypted pilot optical signal; after inverting the encrypted pilot optical signal, comparing the inverted encrypted pilot optical signal with a pseudocode signal corresponding to a current status; and if the inverted encrypted pilot optical signal is the same as the pseudocode signal corresponding to the current status, using the pseudocode signal corresponding to the current status to decrypt the encrypted original signal.