A method for real-time and reliable wireless data transmission

Abstract

The invention discloses a real-time and reliable wireless data transmission method, which comprises the steps of collecting data by a sensor and preparing the data for transmission; judging the optimal channel and selecting the optimal channel; and increasing the polling frequency when the signal is not good through the buffering and fast polling mechanism; Transmit the signal to the data concentrator; judge whether the data transmission is over, if not, obtain the signal occupation time; if the channel occupation time is less than the set time, continue to buffer the fast polling mechanism, if the channel occupation time is greater than the set time, obtain the data Transmission state; if the data transmission is not idle, the fast polling mechanism will continue to be buffered; if the data transmission is idle, then the optimal channel will be judged and the optimal channel will be selected. The present invention realizes optimal communication channel selection through an optimal channel selection method, avoids channel blockage, and enhances its own anti-interference ability; adopts a buffering and fast polling extraction mechanism for data, which can ensure that real-time data can be reliably transmitted in the case of poor signals .

Description

technical field [0001] The invention relates to the field of data transmission, in particular to a real-time and reliable wireless data transmission method. Background technique [0002] Wireless transmission refers to a way of data transmission using wireless technology. At present, wireless sensing has become an indispensable part of the data collection field. Most of the sensor data is transmitted to the gateway through wireless transmission, and then uploaded to the server by the gateway. Most of the wireless sensors use the ISM (Industrial Scientific Medical) frequency band. There are a lot of interference signals in these frequency bands. At the same time, the distance between sensors and between sensors and gateways is often long, and the real-time and reliable transmission of sensor data becomes variable. Difficult to get. [0003] The current wireless data is transmitted in real time, and only the current sampling data is simply transmitted. Under the condition of...

AI Technical Summary

Problems solved by technology

Some retransmission mechanisms cannot meet the occasions that require high real-time and reliability

Either fixed-rate communication is used, often the sensor data has been accumulated, and the gateway receives data from a period of time ago, so real-time data transmission cannot be achieved

[0004] However, because the ISM frequency band is an unlicensed frequency band, many wireless devices use this frequency band to communicate and will be interfered. During real-time data transmission, the transmission fails due to poor signal, and the next data will overwrite the current data, resulting in data loss. They are all pre-fixed in the firmware, and you cannot choose to reselect other channels for communication

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