Radio handle communication method of vehicle GSM terminal

Abstract

The wireless handle communication method of the vehicle-mounted GSM terminal of the present invention, the vehicle-mounted GSM terminal is linked with the telephone equipment and data processing equipment of other offices through the GSM network; the wireless handle provides voice communication, keyboard and display; both the wireless handle and the vehicle-mounted terminal have A / D Converter and PWM controller to realize voice analog and digital conversion. Both the sending and receiving sides are processed by the microprocessor for distinguishing voice data frames and packet data frames. Voice data and interactive data information are transmitted in real time in digital wireless communication between the vehicle-mounted GSM terminal and the wireless handle. The wireless transceivers of both parties are half-duplex transceivers, which adopt the method of time-division multiplexing. Both parties transmit or receive data within the specified time slot and keep synchronous to realize the full-duplex transmission function. With the stop-and-wait protocol, the transmission priority of interactive data information is higher than that of voice data. The sending and receiving sides also adopt the sliding window protocol, and the data transmission is reliable.

Description

Technical field [0001] The present invention relates to a combined telephone communication method, especially a telephone communication method for simultaneously transmitting voice and other data on the same line. Background technique [0002] At present, many manufacturers produce various types of vehicle-mounted terminals integrated with wireless digital cellular phone (GSM) modules. The vehicle-mounted terminals are generally installed hidden in the vehicle. In order to realize the functions of the vehicle-mounted phone, the vehicle-mounted terminals are generally equipped with a wired handle. , the voice input and output terminals of the GSM module are connected to the handle through wires, and the key information on the handle is also transmitted to the vehicle terminal through wires. Due to the connection between the handle and the vehicle terminal, it is very inconvenient to install and use, and it has a certain negative impact on the appearance of the vehicle. In or...

AI Technical Summary

Problems solved by technology

This technical solution can only carry out voice communication between the master machine and the slave machine, that is, a call, and cannot perform complex digital data interactive transmissions such as inputting information and displaying data by the keys of the slave machine.

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