SIM card accessing apparatus of mobile terminal

A technology for mobile terminals and access devices, applied in the direction of selection devices, electrical components, transmission systems, etc., which can solve problems such as increased costs and loss of mobile terminal space usage
CN1574991AInactive Publication Date: 2005-02-02INSPUR LG DIGITAL MOBILE COMMUNICATIONS CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
INSPUR LG DIGITAL MOBILE COMMUNICATIONS CO LTD
Publication Date
2005-02-02
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to an accessing device of SIM card of the mobile terminal which enables each multi-media processor and each modem to access SIM card when a dual-frequency dual -module terminal using more than two modems is used. Thus, the accessing device is characterized in that a dual-frequency dual-module terminal with the SIM card comprises the following parts: a first modem and a second modem; when the two modems request to access the SIM card, if the control right is admitted, then the two modems receive the input of clock signals and synchronously exchange data with the SIM card data; a multi-media processor which supplies electricity to the SIM card and outputs switching control signals, the clock signals and admission control rights according the access request of the SIM card of the first modem or the second modem; a switcher which can switch the data paths of the first, the second modems and the SIM card.
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Description

technical field

[0001] The invention relates to a SIM card accessing device of a mobile terminal, which can enable a multimedia processor and each modem to access the SIM card when designing a dual-frequency dual-mode terminal using more than two modems. Background technique

[0002] In general, the GSM (Global System for Mobile Communication-Global System for Mobile Communication) system for European mobile communication terminals using the time division multiple access method uses a Subscriber Identification Module (SIM; Subscriber Identify Module, hereinafter referred to as a SIM card).

[0003] The aforementioned SIM card is a pluggable smart card (smartcard) on the mobile terminal, which is composed of a microprocessor and a memory chip, and stores various information of the owner of the SIM card.

[0004] The above-mentioned SIM card investigates whether the user has already logged into the network. In order to prevent users who have not logged into the network from us...

Claims

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