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Owing to the traffic pattern of wireless sensor networks (WSNs), cluster heads (CHs) around the sink node have larger relaying loads and consume their energy more quickly. This paper first analyzes the corona model. Based on analysis results, we find that nearly balanced energy consumption of WSNs can be achieved with the additional help of arranging different initial conditions. We then propose the...
Video surveillance systems are commonly used for environmental monitoring. Nevertheless, existing systems such as [1, 2] can only monitor scenes statically. When an accident or a fire event happens, we cannot get the critical pictures and check those situations immediately. Therefore, we propose to leverage pan-tilt-zoom (PTZ) cameras and develop a real-time surveillance system, where the PTZ cameras...
Hierarchical routing is an efficient way to lower energy consumption within a cluster. Due to the characteristics of wireless channels, multi-hop communications between a data source and a data sink are usually more energy efficient than direct transmission. However, because the cluster heads (CHs) closer to the data sink are burdened with heavy relay traffic, they drain much faster than other CHs...
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