Data transmission system and method

Abstract

The invention discloses a data transmission system and method. The method is applied to a mobile terminal and an external device connected with the mobile terminal through a USB. The mobile terminal comprises a first modem connected with a first subscriber identity module card and a second subscriber identity module card, a first temporary buffer and a first application processor. The external device comprises a second application processor, a second temporary buffer and a second modem. The second application processor acquires a to-be-transmitted data package according to a detected data transmission instruction, and caches the to-be-transmitted data package in the second temporary buffer so as to enable the first application processor to acquire the to-be-transmitted data package from the first temporary buffer, wherein capacities of the first temporary buffer and the second temporary buffer are equal to a sum of a default capacity and an increase value, and a sum of the default capacity and the increase value is greater than or equal to the size of the to-be-transmitted data package. When the mobile terminal and the external device transmit telecommunication card data, the mobile terminal is easy to crash. The data transmission system and method solves the above problem.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission system and method. Background technique [0002] With the development of mobile communication technology, more and more mobile terminals such as smart phones have the function of dual-card dual-pass, so that users can establish a data service connection while realizing voice service standby. The mobile terminal usually has two subscriber identity cards and a modem connected to the two subscriber identity cards respectively. When the two subscriber identity cards are fully opened, one subscriber identity card (SIM1) can use 4G (the 4th Generation Mobile Communication Technology, Fourth-generation mobile communication technology), such as LTE (Long Term Evolution, long-term evolution technology) network, another subscriber identification card (SIM2) can only use 2G (2-Generation wireless telephone technology, second-generation mobile phone communi...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to propose a data transmission system and method, aiming to solve the problem that the mobile terminal is prone to crash when transmitting telecommunication card data between the mobile terminal and the external device during the dual LTE communication process of the mobile terminal through the external device question

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