Method and system for controlling radio frequency communication distance

Abstract

The invention relates a method for controlling a radio frequency communication distance. The method comprises the following steps of: storing correspondence between a communication distance and radio frequency characteristic parameters in radio frequency communication equipment in advance, and setting a trigger threshold value of echo field intensity variation, wherein the radio frequency characteristic parameters comprise an echo field intensity variation value and a radio frequency signal field intensity value; in the process of communication between the radio frequency communication equipment and a radio frequency communication terminal, detecting the current echo field intensity variation value continuously by the radio frequency communication equipment and judging that the absolute value of the current echo field intensity variation value reaches the trigger threshold value of echo field intensity variation; if so, performing the next step; otherwise, repeating the step; acquiring the current radio frequency characteristic parameters by the radio frequency communication equipment, determining the current communication distance according to the correspondence, and then judging whether the current communication distance is in a preset card swiping range; and if so, allowing the card swiping transaction and otherwise, not allowing the card swiping transaction. The method can effectively reduce the factor influence of the radio frequency communication terminal on the distance control and has high stability; and the distance can be accurately controlled.

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 Module SIM (Subscriber Identity Module) card to add radio frequency function (called radio frequency SIM) or add short-range communication module on the mobile phone motherboard to realize the method of mobile phone short-distance communication, the emergence of this method makes the mobile phone become a recharge, consumption, The super intelligent terminal for tra...

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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