Visible-light close range communication system based on mobile phone audio interface and method thereof

Abstract

The invention discloses a visible-light close range communication system based on a mobile phone audio interface. A sending terminal comprises an intelligent terminal which is configured with a coding module and an application program and an external LED module. A receiving terminal comprises a light sensor module, a decoding module and the application program. A visible-light close range communication method based on the mobile phone audio interface comprises the following steps that the coding module packs and codes original data; the coding module modulates data into an audio signal and outputs to the external LED module, and the external LED module sends data as a light form; the light sensor module samples and acquires a light signal sequence; and the decoding module codes the sequence, acquires a data packet and determines whether each data packet can pass CRC verification. Hardware of mobile equipment does not need to be reconstructed and the external LED module can realize close range communication; and near field communication functions of mobile payment, equipment pairing, data exchange among mobile phones and the like can be realized; and a large development space and an application prospect are possessed. The system and the method are widely applied to the wireless communication field.

Description

technical field [0001] The invention relates to the field of short-distance wireless communication, in particular to a visible light short-distance communication system and method based on an audio interface of a mobile phone. Background technique [0002] In addition to Bluetooth, WIFI, and infrared data transmission, the short-range communication technology widely used on mobile devices currently has short-range communication NFC technology. [0003] NFC chips installed on devices such as mobile phones can realize electronic payment or read information of other NFC devices or tags. However, due to the cost of NFC, currently only a limited number of mobile phone platforms are equipped with built-in NFC chips, and low-end mobile phones rarely have built-in NFC chips. [0004] Visible Light Communication (VLC) is an emerging optical wireless communication technology based on visible light (400THz-790THz). Due to its LoS (Line of Sight) characteristics, VLC can provide short-...

AI Technical Summary

Problems solved by technology

However, due to the serious fragmentation of smartphones, the control interface of the built-in LED flash is not uniform, and the smartphone is a multi-tasking operating system, resulting in poor controllability and timeliness of LED flash.

At the same time, some low-configuration smartphones do not have LED flashlights, so there are great limitations in using the built-in LED flashlights of mobile phones for communication without changing the hardware of the mobile phone.

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