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A wide range of applications used in wireless sensor networks requires location information of multimedia sensor nodes. In general, the topographical location information of data acquired by a sensor is applied for smart, interactive multimedia services. However, conventional techniques employ GPS or other location-tracking devices installed on sensor nodes and thus incur additional costs, making...
Greedy forwarding fails due to void area, termed a hole, where no nodes can be deployed in realistic wireless sensor networks. This is known as the local minimum problem. Several schemes have been recently proposed to solve this problem. However, they have the problem that nodes, which are adjacent to the hole, have to maintain hole boundary information and an increase in hop counts due to additional...
In realistic wireless sensor networks (WSNs), wireless link can be extremely unreliable and for the reliable and efficient data delivery many characteristics should be considered such as link quality, distance and energy. Therefore, an optimal solution which considers these characteristics is necessary. Previous geographic routing protocols which consider only some of these characteristics are not...
Applications in wireless sensor networks (WSNs) experience the ??local minimum phenomenon.?? This is caused by deployment holes and blocks forwarding process. Recent noteworthy schemes, such as SLGF, Virtual Ellipse, and Virtual Circle, have been proposed to bypass holes. However, they still have a long routing path. In this paper, we introduce a Virtual Convex Polygon approach in which the hole boundary...
In the development of various large-scale sensor systems, a particularly challenging problem is how to dynamically organize the sensor nodes into clusters and route the sensing information to a remote base station. By leveraging the spatial correlation, there have been some noteworthy clustering schemes proposed recently, such as EEDC and ASAP. However, they are based on an impractical assumption...
Continuous data collection applications in wireless sensor networks require sensor nodes to continuously sample the surrounding physical phenomenon and then return the data to a processing center. Battery-operated sensors have to avoid heavy use of their wireless radio by compressing the time series sensed data instead of transmitting it in raw form. One of the most commonly used compacting methods...
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