Nationz Technologies Incorporated

Rui Dong

Haixiang Wang

Hao Zou

Shiying Liu

Genping Wang

Simin Guan

The present invention relates to a communication method, device, and system. The communication method include using low-frequency alternating magnetic field signals to control a communication distance between a first radio frequency (RF) device and second RF device. The communication device receives and uses a first low-frequency alternating magnetic field signal transmitted from a second RF device to control the communication distance to the second RF device. The communication system includes a first RF device and a second RF device. The first RF device generates and transmits a first low-frequency alternating magnetic field signal and receives a second low-frequency alternating magnetic field signal, and the second RF device generates and transmits the second low-frequency alternating magnetic field signal and receives the first low-frequency alternating magnetic field signal. The first RF device and the second RF device control the communication distance using the first and second low-frequency alternating magnetic field signals.

Communication device and system

The present disclosure includes a smart card. The smart card includes an audio module to receive a money deduction request in a form of an external audio signal from an external device, wherein the monetary-amount deduction request includes a monetary amount to be deducted and the external device's identification information. The smart card further includes a data processing module to authenticate the external device's identification information, deduct the monetary amount from the smart card after the authentication of the external device's identification information is passed, and generate monetary-amount-deduction result information. The audio module transmits to the external device the monetary-amount-deduction result information in a form of an audio signal, wherein the monetary-amount-deduction result information includes a deducted monetary amount to be added to the external device and the smart card's identification information to be authenticated by the external device.

Smart cards and smart card communication methods and systems

Communication method, device, and system

Growing community of inventors

Shenzhen, China

Rui Dong