Method and system for controlling radio frequency communication distance

Abstract

The present invention relates to a method for controlling radio frequency (RF) communication distance. Said method includes: corresponding relationship between communication distances and RF characteristic parameters is saved in an RF communication device beforehand, and a trigger threshold of echo field intensity variation is set, said RF characteristic parameters including said echo field intensity variation value and RF signal field intensity value; during communication between the RF communication device and an RF communication terminal, the RF communication device keeps detecting the current echo field intensity variation value and judging whether its absolute value has reached the trigger threshold of the echo field intensity variation; if yes, the next step is carried out; if not, the current step is repeated; the RF communication device obtains the current RF characteristic parameters, determines the current communication distance according to the corresponding relationship, and then judges whether the current communication distance is within the preset card swiping range; if yes, card transactions are permitted; if not, card transactions are not permitted. The present invention effectively reduces influence of individual RF communication terminal on distance control, and good stability and accurate distance control can be achieved.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for controlling radio frequency communication distance. Background technique [0002] Radio frequency communication terminals, especially mobile phones, have been popularized. Through transformation, radio frequency communication terminals have short-distance communication functions, and the demand for electronic payment and other functions by using radio frequency communication terminals such as mobile phones is becoming more and more intense. At present, user identification in mobile phones has appeared The method of adding radio frequency function (called radio frequency SIM) on the module SIM (Subscriber Identity Module) card or adding a short-distance communication module on the main board of the mobile phone to realize the short-distance communication of the mobile phone. The emergence of this method makes the mobile phone a rechargeable, consumer , transaction...

AI Technical Summary

Problems solved by technology

This method is relatively complicated; when the detector array is used to detect the near-field spectrum of the radio frequency mobile terminal, it is difficult to achieve good isolation between each detector, so that it is difficult to identify the spectrum

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