Near field communication method based on magnetic sensor

Abstract

The invention provides a near field communication mode based on a magnetic sensor. A magnetic induction signal emitted by a CPU is used and communication is performed through a magnetic intensity sensor on an intelligent mobile phone mobile device. The CPU and the magnetic intensity sensor are components which are widely used in the intelligent mobile device. The need of special hardware is eliminated and an extra bandwidth is provided to supplement an existing near field communication protocol. The characteristic of the magnetic signal of the CPU is systematically analyzed, and unidirectionalcommunication, full-duplex communication and multiple-transmitter communication are realized on the common intelligent device.

Description

technical field [0001] The present invention relates to the field of near-field communication, in particular to a method for near-field communication based on a magnetic sensor. Background technique [0002] Near Field Communication (NFC) has attracted considerable attention in recent years because it has facilitated the development of mobile applications such as mobile payment, social networking, and interactive games. But now, even though most smartphones of mainstream brands are integrated with NFC near-field communication modules, due to the strict requirements of NFC chips, there are still a large number of mobile devices without NFC. The current NFC implementation is based on the ISO-13157 standard, which requires dedicated hardware, namely the NFC chip module, which includes antennas and circuits for encoding and decoding. However, the need for NFC chips will lead to additional costs. In order to use NFC chips, mobile phone manufacturers have to increase the size of ...

AI Technical Summary

Problems solved by technology

However, these alternatives to NFC also face various problems

First, they are vulnerable to security issues

For example, Bluetooth works at a longer communication range than standard NFC, making it easy for an attacker to eavesdrop on the transmitted information

Second, communication channels are subject to noise and interference, for example, Bluetooth can easily interfere with WiFi signals, not to mention acoustic and visible light methods

Therefore, existing alternative NFC implementations cannot meet both security and performance requirements

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