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In wireless sensor networks, the existing real-time routing protocols for stationary sinks exploit a spatiotemporal approach, utilizing the delivery speed based on the end-to-end distance to fulfill the desired time deadline. This approach cannot be directly applied to a mobile sink since the distance can be varied depending on its movement. That is, the delivery speed cannot be determined without...
In wireless sensor networks, with respect to a desired time deadline real-time data dissemination schemes achieve that by a spatiotemporal communication approach forwarding data from a source to a destination with a delivery speed. The delivery speed is typically obtained from both the static distance from the source to the destination and the interval of the time deadline. However, in case of real-time...
An energy efficient multi hop sensor network cannot avoid the energy hole problem, which is the rapid decrease in the energy of nodes around the sink. Also as a sensor network has a limited node resources and unexpected changes of external environment, its nodes should show energy efficiency, reliable data transmission, and topological adaptation to the change of external environment. This study proposes...
The overhearing feature of wireless transmission has been widely employed for applications such as network time synchronization, malicious packet-modifying attacks detection, and reducing redundant transmissions in wireless sensor networks (WSNs). In this letter, we exploit the overhearing feature of wireless transmission to propagate the location information of a mobile sink to a source in WSNs,...
Many sensor network applications have been developed for smart home, disaster management, and a wide range of other applications since the ZigBee standard was released. These applications, however, generally assume a static base station as well as static sensor nodes. For mobile sink applications, there are many challenges that need to be taken into consideration, such as the difficulty in detecting...
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