Adjustable Strictness Energy Efficient Monitoring on Water Distribution Networks with NB-IoT
| Autor: | Yi-Jyun Lin, 林怡均 |
|---|---|
| Rok vydání: | 2019 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 107 For monitoring on water distribution networks, the sensor network lifetime is important to be as long as possible due to the high cost to replace dead nodes underground. Narrow Band Internet of Things (NB-IoT) is a novel radio technology that well suits the features of public civil resource monitoring systems, such as massive amount of devices, low transmission data rates, and the needs of low energy consumption and good penetration to indoor or underground. Using NB-IoT as the wireless communication intermediary in our monitoring system, an operational strategy is proposed to prolong the sensor network lifetime. Our strategy can be divided into two phases. First, a k-extended-cover algorithm is designed to adjust the data resolution and prioritize the reporting of the data according to the distance between the sensor nodes. Second, an eDRX assignment policy is presented to balance power consumption and wake-up latency tradeoff, by using the result of the k-extended-cover algorithm. Next, a semi-Markov process is modeled to numerically analyze the system performance and to obtain the power saving factor and wake-up latency. Finally, the system performance is discussed with the simulation results. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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