CDMA-based remote data transmission method

Abstract

The invention relates to a CDMA-based remote data transmission method. A main controller sends a data request command to a CDMA module; after receiving the data request command sent by the main controller, the CDMA module sends data information to a CDMA interface and stores the data information in an internal data buffer area of the main controller; after the data information is stored in the internal data buffer area of the main controller, AT instruction decoding is carried out, and the data information is stored in a static memory through a memory module. By taking a policy of alternately receiving the data information through two buffer areas, the delay and the lagging of data transmission and data processing are greatly retarded, the aim of parallel processing is achieved, and the performance of the whole remote transmission is improved. In order to avoid the interference on power supplying of the CDMA module caused by high-frequency interference and transient peak values of the surrounding environment, an LC low-frequency oscillating circuit is added to the output end of a voltage stabilizing module, and the filtering effect is achieved, so that the impact on a power supply system of a module power supply can be avoided to a great extent.

Description

technical field [0001] The present invention relates to industrial telecommunication technology, in particular to a CDMA-based long-distance data transmission and backup method. Background technique [0002] Microelectronics technology, computer technology, communication network technology and wireless mobile communication technology continue to develop rapidly, bringing great changes to industrial communication technology. To realize remote monitoring or ultra-long-distance monitoring, the transmission medium is nothing more than wired and wireless. Wired methods include RS485 local data transmission network and dial-up access to the Internet through telephone lines. However, in these two methods, cables must be laid at the transmission end, which not only prolongs the construction period, but also increases the cost of the project. In fact, this is difficult to achieve in some remote field environments or difficult working environments, or for some moving monitoring objec...

AI Technical Summary

Problems solved by technology

In fact, it is difficult to achieve in some remote field environments or difficult working environments, or for some moving monitoring objects

However, there are relatively obvious defects in the way of using radio stations for wireless data transmission: the hardware part of the radio station is expensive, and the initial installation of the system is expensive; the data transmission distance of the radio station is short, and the transmission distance of general commercial radio stations is on the order of hundreds of kilometers. If ultra-long-distance data transmission is required, a relay station must be established by itself, which further increases the investment cost; the reliability of radio data transmission is poor

Generally, commercial radio stations work at a single frequency point, and the electromagnetic environment is harsh. In addition, due to the defects in the data transmission protocol, the reliability of data transmission is also reduced; the system maintenance is difficult and the maintenance cost is high.

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