適用於智慧校園之永續 LoRaWAN 物聯網架構

Abstract

物聯網 (IoT) 技術是智慧校園應用的關鍵，所需的物聯網基礎設施必須具備容錯和 節能，才能為此類應用提供持續服務。在低功耗廣域網路 (LPWAN) 技術中，LoRaWAN 是滿 足要求的最佳候選。本論文對 LoRaWAN 智慧校園網路架構進行了研究。本論文在LoRaWAN網 路下使用多個閘道器，採用主從備份，避免單點故障，增加網路的可靠性。同時，物聯網終 端設備可以選擇合適的擴頻因子，實現更高的能效。本文提出的架構是在現有的 LoRaWAN 網 路開源組件 ChirpStack 上實現的。此設計在台灣國立台灣師範大學 (NTNU) 進行了實證 評估，實驗結果表明，所提出的網路架構可以容忍 LoRaWAN 閘道器故障，同時節省每個 LoRa 終端設備的能源消耗。

Internet-of-Things (IoT) technology is key for smart-campus applications, and the needed IoT infrastructure must be both fault-tolerant and power-saving to offer a continuous service for such applications. Among Low-Power Wide-Area Network (LPWAN) technologies, LoRaWAN is a promising candidate to meet the requirements. This thesis presents a study for a LoRaWAN smart-campus networking architecture. This thesis uses multiple gateways under the LoRaWAN network to adopt the primary/backup approach to avoid a single point of failure and increase the reliability of the network. At the same time, the IoT end device can select appropriate spreading factor to achieve higher energy efficiency. The architecture proposed in this thesis is implemented on the existing LoRaWAN network open source component called ChirpStack. The implementation is empirically evaluated at at National Taiwan Normal University (NTNU) in Taiwan., and the experiment results suggest that the proposed networking architecture may tolerate LoRaWAN gateway failure while saving energy spent at each LoRa end device.