Method and system capable of synchronously restoring handshake

A state and signal technology, applied in the field of photonic Internet of Things, can solve problems such as loss of meaning, inability to maintain synchronization between the transmitter and the transmitter, and loss of synchronization information, etc., to achieve the effect of improving security

Active Publication Date: 2012-11-07
KUANG CHI INTELLIGENT PHOTONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But this synchronization method may also encounter a new problem, that is, when the transmitter is powered off and then powered on again, its state will lose the synchronization information and return to the initial state, while the state of the receiving end may not be the initial state at this time state, in this case, the transmitter and the transmitter cannot be synchronized, that is, the encrypted pseudocode sequence used by the transmitter and the pseudocode sequence used by the receiver to decrypt are inconsistent
Therefore, the visible light signal sent by the transmitting end cannot be correctly decrypted at the receiving end, thus making this synchronization method meaningless

Method used

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  • Method and system capable of synchronously restoring handshake
  • Method and system capable of synchronously restoring handshake

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] see figure 1 , is a flow chart of a method for restoring handshake synchronization provided in Embodiment 1 of the present invention. The method for restoring handshake synchronization includes:

[0023] S101: The transmitting end whose state machine changes with unit time is powered off and then powered on again.

[0024] S102: The transmitter transmits a status reset signal that changes with unit time to the control system in the form of a flash.

[0025] Among them, the status reset signal consists of three parts: status reset code, status indicator code and original signal (such as ID). The reset code has a unique value and has the same length as the light guide signal; the state indication code is a random number, which is used to indicate the pseudo code sequence of which state the photon receiving end uses. After the status reset signal is modulated by the modulator, it is emitted by the LED.

[0026] S103: The receiving and controlling system receives the vis...

Embodiment 2

[0033] see figure 2 , is a flow chart of a method for restoring handshake synchronization provided in Embodiment 2 of the present invention, and the method for restoring handshake synchronization includes:

[0034] S201: The transmitting end of the state machine that changes with unit time is connected to the receiving and controlling system.

[0035] Through this step, the transmitting end and the receiving and controlling system realize a handshake.

[0036] Wherein, the receiving and controlling system includes a system control platform and receiving terminals connected with the system control platform.

[0037] Specifically, the state machine of the transmitting end is constantly changing with unit time, and its state machine is just in the Nth state during a certain period of time; the transmitting end is connected to the system control platform.

[0038] S202: The receiving and controlling system adjusts the state of each receiving end state machine to be synchronized...

Embodiment 3

[0081] see image 3 , is a flow chart of a handshake synchronization method based on visible light communication provided in Embodiment 3 of the present invention, and the method includes:

[0082] S301: The transmitting end of the state machine changing with unit time is connected to the system control platform.

[0083] Specifically, the state machine of the transmitting end is constantly changing with unit time, and its state machine is just in the Nth state during a certain period of time; the transmitting end is connected to the system control platform.

[0084] Through this step, the transmitter and the system control platform implement handshake.

[0085] S302: The system control platform adjusts the state of its own state machine, and the state of each receiving end state machine connected to the system control platform is synchronized with the state of the transmitting end state machine.

[0086] S303: The transmitter performs logic operations on the original signal...

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Abstract

The embodiment of the invention discloses a method and a system capable of synchronously restoring handshake. The method is as follows: when the emitting end of a state machine, which changes with time, is electrified again, state reset signals changing with time are sent to a receiving and controlling system in a manner of visible light signals; and the receiving and controlling system judges that the visible light signals are state reset signals when receiving the visible light signals, the state of the state machine is changed to the state indicated by the state reset signals. Due to the adoption of the method, the emitting end of a state machine can be in a synchronous state after being electrified again.

Description

【Technical field】 [0001] The present invention relates to the technical field of photonic internet of things, in particular to a method and system for restoring handshake synchronization during the transmission of visible light signals. 【Background technique】 [0002] Visible light communication is a new, short-distance, high-speed wireless optical communication technology developed on the basis of LED technology. The basic principle of visible light communication is to use the characteristics of light-emitting diodes (LEDs) to switch faster than fluorescent lamps and incandescent lamps, and to communicate through high-frequency flickering of LED light sources. Light represents 1, and no light represents 0, sending out high-speed optical signals. The information is obtained through photoelectric conversion. Wireless optical communication technology can be used to make wireless optical encryption keys because its data is not easy to be interfered and captured, and optical co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00H04B10/10
Inventor 刘若鹏栾琳肖光锦
Owner KUANG CHI INTELLIGENT PHOTONIC TECH
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