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Data transmission method between switchboard and terminal

A data transmission and switch technology, applied in the field of data communication, can solve the problem of long time-consuming transmission of large amounts of data, and achieve the effect of improving the speed of information transmission

Inactive Publication Date: 2006-10-25
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method capable of realizing high-speed data transmission between the switch and the terminal, so as to solve the problem of time-consuming transmission of large amounts of data between the switch and the terminal, and to provide a specific data packet transmission method Format

Method used

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  • Data transmission method between switchboard and terminal
  • Data transmission method between switchboard and terminal
  • Data transmission method between switchboard and terminal

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Experimental program
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Effect test

Embodiment Construction

[0015] Such as image 3 As shown, in the two-way FSK-based data transmission mode between the switch and the terminal, the frequency of the logic 1 of the FSK signal is 1200Hz±1%; the frequency of the logic 0 is 2200Hz±1%; the baud rate is 1200Baud±1.2%. The modulation mode adopts continuous phase binary frequency shift keying, and the data transmission mode is binary asynchronous serial mode.

[0016] Such as Figure 4 As shown, the composition and transmission sequence of FSK data bytes should meet the following requirements: each data byte should have a start bit "0" and a stop bit "1".

[0017] The transmission order of the data bytes is: the start bit first, then the FSK data bit, and finally the stop bit. FSK data is transmitted in byte order, that is, byte 1 first, then byte 2, and so on, and the transmitted data signals are continuous.

[0018] sync boot string

information type

message length

message serial number

Message layer information c...

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Abstract

Data transmission in bidirectional FSK mode between exchange and terminals is adopted in the method. Signal modulation in FSK mode is binary frequency shift keying in continuous phase. Binary asynchronous serial mode is adopted as mode for data transmission. Based on byte sequence, FSK data are transmitted. The invention raises speed for transmitting information between exchange and terminal greatly so as to provide support at communication layer for developing interaction service in large data quantity between exchange and terminals.

Description

technical field [0001] The invention relates to data communication, in particular to a data transmission method between an exchange and a terminal. Background technique [0002] At present, the newly developed services between the switch and the terminal need to transmit more and more data, and the data transmission speed is required to be higher and higher. At present, the data transmission between the switch and the terminal generally adopts DTMF (Dual-Tone Multiple Frequency Dual-Tone Multiple Frequency). Tone Multi-Frequency Signal) mode, in the DTMF mode, it takes at least 80ms for each bit of data to be transmitted (GB / T15279-94 "Technical Conditions for Automatic Telephones"), in the case of applications with a relatively large amount of data, the transmission takes time For a long time, this has been a bottleneck for the development and promotion of various new businesses. In addition to the DTMF method, various communication manufacturers have also developed a data...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M9/00H04L27/10
CPCH04L27/10
Inventor 曾祥勇
Owner HUAWEI TECH CO LTD
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