Infusion pump network of LoRa transmission

Abstract

The invention proposes an infusion pump network of LoRa transmission. The network consists of a plurality of LoRa infusion pumps and a plurality of LoRa gateways, drug administration information is transmitted by using an elastic method in the LoRa transmission of a pump head, and differential priority reporting is performed on three states, namely non drug administration, normal drug administration and clinical drug administration, so that the bandwidth utilization rate of the LoRa network is effectively improved. An MAC layer of LoRa transmission of the pump head adopts a frequency hopping communication method: configuring a plurality of radio frequency channels the same as those on the LoRa gateway to a LoRa module; before the pump head reports data, randomly selecting the configured channel, monitoring the RSSI signal strength of an air interface, and if the RSSI is less than a threshold value, directly reporting the data; if the RSSI exceeds the threshold value, deeming that the channel is busy, randomly selecting a rest channel, and monitoring the RSSI signal strength of the air interface; and so on, if all channels are busy, performing delayed backoff through a CSMA algorithm, performing the monitoring after the backoff, and reporting the data until an idle channel is monitored, and if the backoff exceeds the maximum count, discarding the data. In this way, the high concurrent communication of the wireless LoRa infusion pump network is achieved, and the data transmission success rate of the LoRa infusion pump is greatly improved.

Description

technical field [0001] The invention proposes a LoRa-transmitted infusion pump network, which relates to the fields of the Internet of Things and low-power wide-area networks. Background technique [0002] LoRa is one of the LPWAN communication technologies, and it is an ultra-long-distance wireless transmission solution developed by Semtech based on CSS spread spectrum technology. This solution has changed the trade-off between transmission distance and power consumption in the past, and provides users with a simple system that can achieve long-distance, long battery life, and large capacity. At present, the traditional FSK network has disadvantages such as multi-path effect, wide frequency band, and low frequency band utilization, which is not conducive to the application in buildings; compared with FSK modulation, LoRa has the advantages of long distance, low power consumption, and strong anti-interference , suitable for applications with long distances and complex envir...

AI Technical Summary

Problems solved by technology

Due to the low LoRa rate, the single packet data of the LoRa infusion pump takes a long time in the air, so there will be more channel conflicts, resulting in data loss in the air

Especially in building applications, there are usually dozens of infusion pumps working at the same time, so the probability of channel conflict will be higher

Therefore, high-frequency interaction and easy collision of air data have become problems in the application of LoRa infusion pumps.

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