A Collision Detection Method Using Magnetic Two-way Communication

Abstract

Disclosed are a collision detection method, a magnetic radio frequency device and a communication system. A first magnetic radio frequency device performs magnetic communication access with a second magnetic radio frequency device using a magnetic channel; and the first magnetic radio frequency device further emits a collision detection request signal via the magnetic channel and judges whether there are a plurality of second magnetic radio frequency devices colliding with each other according to whether a response signal of the collision detection request signal is received or according to the received response signal. During the whole process of collision detection, the interaction between relevant instructions is performed via the magnetic channel without the participation of a radio frequency module and independent of a radio frequency channel, so the radio frequency interaction time will not be affected, improving the communication efficiency of the first magnetic radio frequency device and the second magnetic radio frequency device to a certain extent; furthermore, the situation where relevant instructions for detecting collisions on the radio frequency channel interfere with the application data can be avoided, thus the accuracy of collision detection results and the reliability of radio frequency communication can be improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a collision detection method utilizing magnetic two-way communication. Background technique [0002] With the popularity of mobile terminals, the demand for electronic payment using mobile terminals has become very urgent. There are currently many implementation schemes, one of which is realized by integrating a 2.4G radio frequency communication module and a magnetic signal magnetic induction module in a smart card such as a mobile phone SIM card or SD card. The magnetic communication of this scheme is one-way communication. The SIM card or SD card in the mobile phone detects the coupled magnetic signal strength and receives magnetic information to activate the radio frequency communication module on the SIM card or SD card for radio frequency data exchange. This radio frequency data exchange method has been widely used in many fields such as electronic wallet payment, bus...

AI Technical Summary

Problems solved by technology

[0004] It can be seen from the above that in the radio frequency communication system where magnetic communication is one-way communication, the conflict detection method adopted, the conflict response is replied on the radio frequency channel, and the first magnetic radio frequency device must periodically inquire whether there is any Conflict response, occupying the normal radio frequency interaction time, resulting in a longer time for the first magnetic radio frequency device and the second magnetic radio frequency device to swipe the card

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