Energy-efficient Routing Protocol for a Wireless Sensor Network with Diverse Sensing Rates
| Autor: | Shih-Wei Yeh, 葉時瑋 |
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| Rok vydání: | 2018 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 107 Energy conservation is an important issue in wireless sensor networks. Many studies thus propose cluster-based approaches for packet routing to save energy of sensors. However, most of them assume that sensors have the same (constant) sensing rate. In practice, sensors could have different sensing rates due to application requirement. Obviously, a sensor with a higher sensing rate will consume more energy. However, most methods select cluster heads based on just the position and residual energy of each sensor. In this case, they may select a sensor with a high sensing rate to be the cluster head, which let it quickly exhaust energy. Besides, some studies assume that each sensor can directly send data to the sink. However, the amount of energy consumption on data transmission highly depends on the distance between source and receiver. Thus, these methods would make sensors consume more energy. Based on the above motivations, this paper proposes an Energy-efficient routing protocol for sensors with Diverse Sensing Rates (E-DSR) method. To efficiently select cluster heads, we divide the network into grids and select each cluster head based on its position and amount of remaining energy. In addition, we also choose different paths for sensors based on their distances to the sink and sensing rates. To balance energy consumption of sensors in a cluster, we adaptively reselect the cluster head. In this way, we can avoid the cluster head spending much energy on relaying packets. Through simulations, we show that our E-DSR method can significantly extend network lifetime and also reduce the packet loss rate. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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