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 an SIM card selecting module, four SIM card interface modules, two baseband interface modules, a source control module and a chip selection control module, wherein the SIM card selecting module is used for generating SIM card resetting information, data information, power information and clock information corresponding to the received SIM card selecting information; the four SIM card interface modules and the two baseband interface modules are used for transmitting interactive information between baseband chips and SIM cards; the source control module is used for controlling the connection relation of the two baseband interface modules and the four SIM card interface modules, obtaining the information of the selected SIM card interface modules from the chip selection control module, and establishing a connection with the baseband interface modules according to the correspondence relation between the baseband interface modules and the SIM card interface modules; and the chip selection control module is used for obtaining the information of the selected SIM card interface modules from the received information and establishing a connection between the source control module and the selected SIM card interface modules. In the invention, the four-card and four-standby effect is realized, simultaneously the structure of the device is simplified and the production cost is reduced.

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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