Mobile phone near field communication system and method based on visible light

Abstract

The invention provides a mobile phone near field communication system and method based on visible light. The mobile phone near field communication system and method based on the visible light are used for short distance wireless communication. According to the mobile phone near field communication system, a transmitting terminal is arranged on a mobile device provided with a light-emitting screen and a light sensor, and comprises an encoding module and a rate adaptive mechanism module; a receiving terminal is provided with an LED and comprises a light sensor array, a signal conditioning module, a decoding module and a feedback module. The encoding module encodes data into a brightness level sequence and sends the brightness level sequence out through light signals; the receiving terminal collects the light signals to conduct signal conditioning and decoding so as to obtain decoded data; the feedback module is used for feeding back a signal of data blocks which need retransmission and a signal of adjustment of brightness level numbers to the transmitting terminal; the transmitting terminal controls the retransmission of the data blocks and the adjustment of the brightness level numbers through the rate adaptive mechanism module. The mobile phone near field communication system and method based on the visible light are low in cost, easy to use, safer, free of addition of extra hardware, and capable of achieving the near field communication functions such as mobile payment, equipment matching and data exchange between mobile phones.

Description

technical field [0001] The invention belongs to the field of short-distance wireless communication, and in particular relates to a system and method for encoding information into different brightness levels and using visible light for mobile phone near-field communication. Background technique [0002] In addition to Bluetooth and infrared data transmission, the currently widely used short-distance data communication technologies also include radio frequency identification (RFID) and near-field communication (NFC) technologies. [0003] RFID (Radio Frequency Identification, also known as electronic tag) is a non-contact automatic identification communication technology. It identifies a specific target through radio signals and reads and writes relevant data without requiring the identification system to have mechanical or optical contact with the target. It does not require manual intervention, can be used in various harsh environments, can identify high-speed moving object...

AI Technical Summary

Problems solved by technology

However, a major constraint to the promotion of NFC is that currently only a limited number of mobile phone platforms are equipped with built-in NFC chips, and the cost is relatively high

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