Dual-card dual-standby vehicle-mounted terminal and data communication method of dual-card dual-standby vehicle-mounted terminal
A vehicle-mounted terminal, dual-card dual-standby technology, applied in wireless communication, electrical components, etc., can solve the problems of no signal, real-time vehicle information, and transmission to the central server, so as to ensure reliability and improve network resource utilization. Effect
Inactive Publication Date: 2014-07-30
BEIHANG UNIV
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Problems solved by technology
Single-card mobile terminals may have no signal, and cannot transmit vehicle information to the central server in real time
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[0036] In order to further illustrate the technical means adopted by the present invention to achieve the intended purpose, the dual-card dual-standby vehicle-mounted terminal and its data communication method of the present invention will be further described in detail below using specific implementation methods. See figure 1 —— Figure 8 .
[0037] 1) A dual-card dual-standby vehicle-mounted terminal of the present invention is mainly composed of a main chip, a power supply module, a GPRS / CDMA dual-network communication module, a Beidou positioning module and a data storage module. The position connection relationship between them is: the power supply module converts the appropriate voltage value into the main chip, GPRS / CDMA dual-network communication module, Beidou positioning module and data storage module through the voltage conversion circuit; GPRS / CDMA dual-network communication The module and the Beidou positioning module communicate with the main chip through the U...
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The invention discloses a dual-card dual-standby vehicle-mounted terminal which is composed of a main chip, a power module, a GPRS / CDMA dual-network communication module, a Beidou positioning module and a data storage module. The voltage of the power module is converted through a voltage conversion circuit into voltage values to respectively supply power to the main chip, the GPRS / CDMA dual-network communication module, the Beidou positioning module and the data storage module. The GPRS / CDMA dual-network communication module and the Beidou positioning module are in communication with the main chip through UART interfaces, and the data storage module is in communication with the main chip through an SPI. A data communication method of the dual-card dual-standby vehicle-mounted terminal includes the three steps that (1) GPRS / CDMA network online conditions are judged; (2) a communication network is selected; (3) the vehicle-mounted terminal is in communication with a center server according to the selected network. According to the dual-card dual-standby vehicle-mounted terminal and the data communication method, current wireless service use signals of a user are good, a wireless communication module low in communication price is used, and the network resource utilization rate is improved.
Description
technical field [0001] The invention relates to a dual-card dual-standby vehicle-mounted terminal and a data communication method thereof, belonging to the technical field of mobile communication. Background technique [0002] At present, with the development of the network, single-card mobile terminals can no longer meet people's needs for the network, and many mobile terminals have dual-card dual-standby functions. The vehicle-mounted terminal must transmit information to the central server in real time. The single-card mobile terminal may have no signal, and cannot transmit vehicle information to the central server in real time. [0003] The dual-card dual-standby vehicle terminal has two subscriber identification card (referred to as SIM card) slots. Two different SIM cards can be inserted at the same time. Two of the card slots respectively support the insertion of cards of two different networks, which are called dual-mode communication terminals. The vehicle termi...
Claims
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IPC IPC(8): H04W24/02H04W88/06
Inventor 王建杨燕飞
Owner BEIHANG UNIV