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Wireless communication system of SIM (Subscriber Identity Module) card and communication method thereof

A technology of a wireless communication system and a communication method, applied in the SIM card wireless communication system and the communication field thereof, can solve the problems of connection failure, weakening the reliability and stability of the connection between the SIM card and the communication terminal equipment, and easily damaged contacts, etc. The effect of improving reliability, improving service life and strong anti-interference ability

Active Publication Date: 2014-11-05
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, repeated plugging or external force can easily damage the external contacts, resulting in the failure of the connection, thus weakening the reliability and stability of the connection between the SIM card and the communication terminal equipment, especially in public telephones, etc. It is especially prominent in devices with frequent card insertion

Method used

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  • Wireless communication system of SIM (Subscriber Identity Module) card and communication method thereof
  • Wireless communication system of SIM (Subscriber Identity Module) card and communication method thereof
  • Wireless communication system of SIM (Subscriber Identity Module) card and communication method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment one: if figure 1 As shown, a SIM card wireless communication system includes a SIM module 1 and a communication terminal module 2, wherein the SIM module 1 and the communication terminal module 2 communicate through a wireless connection.

[0062] The communication terminal module 2 has the first function: to provide power to the SIM module 1 through electromagnetic coupling, and the second function: to send the CLK level signal, RESET level signal and IO level signal to the SIM module 1 by wireless means to realize information Transmission from the communication terminal module 2 to the SIM module 1; at the same time, it is used to receive the level signal of the IO pin of the SIM card 11 wirelessly sent by the SIM module 1. The communication terminal module 2 is provided with - GSM sub-module 21 , - power transmission sub-module 22 , - data transmission direction detection sub-module A 24 , - wireless transceiver sub-module A 23 . in:

[0063] - The GSM s...

Embodiment 2

[0091] Embodiment two: if Figure 8 Shown, a kind of communication method of SIM card wireless communication system, take 3.25MHz CLK clock signal as example, comprise the following steps:

[0092] S1. The power sending sub-module of the communication terminal module 2 wirelessly transmits the generated power to the power receiving sub-module 12 after processing. Step S1 comprises the following steps:

[0093] S101. Generate an AC signal in the form of electric energy with the same frequency as the clock signal of the SIM card, which is realized by a signal generating circuit. specific:

[0094] A 13MHz clock signal is generated by a 13MHz active crystal oscillator in the power sending sub-module 22, and the generated clock signal is divided by 4 to obtain a 3.25MHz AC signal in the form of power.

[0095] S102 , amplify the power of the AC signal, which is realized by the signal amplifying circuit 222 . specific:

[0096] A signal amplifying circuit 222 with class E powe...

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Abstract

The invention discloses a wireless communication system of an SIM (Subscriber Identity Module) card. The wireless communication system comprises an SIM module and a communication terminal module, wherein the communication terminal module is provided with a GSM (Global System for Mobile Communication) sub-module, an electric energy transmitting sub-module, a wireless transmitting and receiving sub-module A and a data transmission direction detection sub-module A, the SIM module is provided with an SIM card, an electric energy receiving sub-module, a wireless transmitting and receiving sub-module B, a data transmission direction detection sub-module B and a CLK (Clock) clock signal generation sub-module. The invention further discloses a communication method of the wireless communication system of the SIM card. According to the wireless communication system of SIM card and the communication method thereof, contact corrosion of an external contact caused by influence of more than once contact plugging or external force is avoided, and reliability and stability of communication are improved; the service life of the SIM card and communication terminal equipment can be prolonged; and a method of simultaneous transmission of electric energy and a signal is implemented.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a SIM card wireless communication system and a communication method thereof. Background technique [0002] SIM card is the abbreviation of Subscriber Identity Module (customer identification module). A general SIM card has 8 pins, among which the GSM module provides power to the SIM card through the VCC and GND pins of the SIM card, and the SIM card communicates with the GSM module through the IO pin under the control of the CLK pin signal and the RESET pin signal. to communicate. The communication between the GSM module and the SIM card is realized through the high and low levels on the CLK pin, the RESET pin and the IO pin. The CLK pin and the RESET pin are simplex, and the IO pin is duplex. . [0003] The traditional connection between the SIM card and the GSM module is electrical or contact connection, and the two are in contact with each other through expos...

Claims

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Application Information

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IPC IPC(8): H04M1/725H04B7/26H04M1/72409
Inventor 易建军鞠文强徐骏顾春华朱晓民黄孝慈范体军
Owner EAST CHINA UNIV OF SCI & TECH
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