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Near field communication method based on magnetic sensor

A near-field communication and magnetic sensor technology, applied in the field of near-field communication, can solve problems such as the impact of security issues, easy interference with WiFi signals, and easy eavesdropping of information by attackers, so as to reduce difficulty and meet security and performance indicators.

Active Publication Date: 2020-12-22
SHANGHAI JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Near field communication method based on magnetic sensor
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  • Near field communication method based on magnetic sensor

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0027] Such as Figure 1 to Figure 5 As shown, a magnetic sensor-based near-field communication method provided by the present invention includes two adjacent devices, one of which generates a magnetic induction signal through the CPU, and encodes the information to its sending signal by controlling the operating state of the CPU. In the magnetic induction signal, the magnetic sensor on another device is used to decode the signal. By carefully modulating the magnetic induction signal from the CPU and s...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B5/00
CPCH04B5/00
Inventor 薛广涛潘昊孙雨辉
Owner SHANGHAI JIAOTONG UNIV