LoRaWAN Integrated with Multiple Gateways with Optimization algorithm approach for Improving Downlink Scalability and Reliability. LoRaWAN provides fascinating features for IoT applications, including low power consumption, long-distance, and secure data transport, and is one of the leading technologies in LPWAN. While LoRaWAN offers many advantages, the lack of downlink capability in large-scale scenarios is one of its fundamental limitations. In LoRaWAN, the efficiency achieves by the use of the data transmission scheme. It makes efficient communication unworkable. However, LoRaWAN subjected to Aloha random access for dense network subjected to a large number of collisions. It leads to significant challenges in LoRaWAN scalability and reliability. Verified messages involve a downlink frame from the Network Server to be accepted. The use of verified messages is currently strongly discouraged, however, in order to saturate the ability of terminals to transmit messages efficiently. Th
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