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During a crisis situation, the incident commanders have to tackle several problems simultaneously, e.g., (1) the monitoring of a crisis evolution, (2) guiding and tracking of rescue persons and intervention robots, (3) monitoring rescue persons' health, etc. Thus, several solutions based on wireless sensor networks (WSNs) and cellular networks have been proposed. However, the real life experience...
Sensor networks are composed of a great number of sensor nodes. Sensor nodes are typically energy restricted and hard to recharge, so reducing energy consumption has recently been a hot focus on wireless sensor network researches. One common approach is to make use of a logical structure, such as a grid, to construct an efficient routing topology for shorten the routing paths. This paper proposed...
Data collection is one of the most important functions provided by wireless sensor networks. In this paper, we study the theoretical limitations of data collection and data aggregation in terms of delay and capacity for a wireless sensor network where n sensors are randomly deployed. We consider two different communication scenarios (with or without aggregation) under physical interference model....
When we consider the limited power of wireless sensors, it is necessary to reduce the dimension of data conveyed between sensors, because high dimensional data transmission requires much power consumption of sensors. For data reduction in a network, in-network data aggregation methods and collaborative compression methods were reported. However, the in-network data aggregation methods typically lead...
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