Data transmission system and method

Abstract

The invention discloses a data transmission system and method. The method is applied to a mobile terminal and external equipment connected with the mobile terminal through a USB (Universal Serial Bus). The mobile terminal comprises a first modem which is connected with a first subscriber identification module and a second subscriber identification module, a first temporary buffer area and a first application processor; the external equipment comprises a second application processor, a second temporary buffer area and a second modem; the second application processor is used for acquiring a data packet to be transmitted according to a detected data transmission instruction, and buffering the data packet to be transmitted in the second temporary buffer area, so that the first application processor acquires the data packet to be transmitted from the first temporary buffer area; the capacity values of the first temporary buffer area and the second temporary buffer area are equal to the sum of a default capacity value and an increment value; and the sum of the default capacity value and the increment value is greater than or equal to the size of the data packet to be transmitted. Through adoption of the data transmission system and method, the problem of tendency to system halt in a process when the mobile terminal and the external equipment transmit telecom card data is solved.

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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