Industrial wireless network frequency-domain polling method based on OFDM technology
A technology of industrial wireless network and polling method, which is applied in the field of frequency domain polling of industrial wireless network based on OFDM technology, can solve the problems of low resource utilization rate, high cost of polling technology, and high cost, so as to ensure real-time performance and The effect of improving reliability, improving effective throughput, and improving bandwidth utilization
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[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0033] The present invention proposes an industrial wireless network frequency domain polling method based on OFDM technology. Its main idea is to use OFDM subcarriers to realize frequency domain polling responses, so that the AP can Multiple stations are polled at once; after the AP receives the node's response in the frequency domain, it does not need to accurately restore the original data sent by each node on each subcarrier, but only needs to detect the subcarrier through threshold / peak detection or other technical means Whether it is active; if it is active, it means that there is data to be transmitted, otherwise it means that there is no data.
[0034] The method of the present invention includes polling initial configuration, OFDM frequency domain polling, TDMA time slot allocation and node data transmission, specifically comprising the following ste...
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