Wireless terminal and multi-SIM (subscriber identity module) card connecting device thereof

Abstract

The invention relates to a wireless terminal and a multi-SIM (subscriber identity module) card connecting device thereof. The multi-SIM card connecting device comprises a SIM card selecting module, four SIM card interface modules, a baseband interface module and a control module, wherein the SIM card selecting module is used for receiving the SIM card selection information of a baseband chip and generating the SIM card resetting information, data information, power supply information and clock information corresponding to the received SIM card selection information; the four SIM card interface modules are used for transmitting the interaction information of the baseband chip and the SIM card; the baseband interface module is used for transmitting the interaction information of the baseband chip and the SIM card and transmitting the resetting information, the data information and the clock information between the SIM card interface modules after being connected with the SIM card interface modules; and the control module is used for acquiring the selected SIM card interface module information from the received information and connecting the baseband interface module to the selected SIM card interface module. The device has the advantages that the four-card four-waiting function is realized while the peripheral circuit is simple, the function is conveniently realized and the cost is low.

Description

technical field [0001] The invention relates to the technical field of wireless terminals, in particular to a wireless terminal and a multi-SIM card connection device thereof. Background technique [0002] The SIM card (Subscriber Identity Module, Subscriber Identity Card) is used to authenticate the user identity and service authority on the wireless terminal, and the wireless terminal establishes a connection with the corresponding network and completes the communication function by interacting with the Subscriber Identity Module. In the prior art, a baseband chip of a wireless terminal can only be connected to one SIM card, that is to say, a wireless terminal can only use one phone number. [0003] Driven by the joint development of technology, market and wireless mobile application business, the wireless mobile communication industry has developed rapidly, and mobile communication products have become a must-have for people's daily work and life. As the number of mobile...

AI Technical Summary

Problems solved by technology

[0013] 1) In order to realize the function of four cards and four standbys, each single chip 2 needs peripheral circuits, thus figure 1 The scheme shown requires the design of 2 peripheral circuits, figure 2 The scheme shown requires the design of three peripheral circuits, so the peripheral circuits are more complicated;

[0014] 2) When switching among four SIM cards, figure 1 The scheme shown requires 1 internal command and 2 interface chip commands, figure 2 The scheme shown requires 3 interface chip commands, so more commands are required, which reduces the processing efficiency;

[0015] 3) figure 1 The scheme shown requires two single chips 2, figure 2 The solution shown requires three single chips, which increases the area of ​​the circuit board and increases the production cost; when the requirement of more than four cards and four standbys is realized, more chips are required, thereby further increasing the production cost

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