Data Collection Latency Research Articles

An efficient data collection scheme through multi-path routing structures in wireless sensor networks

An essential method to overcome the high loss rates of wireless communication in sensor data collection is to use multi-path routing. In this paper, we investigate the construction of multi-path routing structures and develop an enhanced scheme for sensor data collection. In constructing multi-path routing structures, we limit the number of messages that each node transmits and receives in data collection to achieve a required energy efficiency level. Then, we design and analyse an enhanced data collection scheme in which sensor nodes exploit the broadcast nature of wireless transmission to overhear their neighbours. This increases the numbers of data propagation paths from sensor nodes to the base station and improves the robustness of data collection without sacrificing the latency of data collection. Experimental results show that our methods achieve significantly better trade-offs among the robustness, latency and energy efficiency of data collection.

Optimizing data collection path in sensor networks with mobile elements

Exploiting mobile elements (MEs) to accomplish data collection in wireless sensor networks (WSNs) can improve the energy efficiency of sensor nodes, and prolong network lifetime. However, it will lead to large data collection latency for the network, which is unacceptable for data-critical applications. In this paper, we address this problem by minimizing the traveling length of MEs. Our methods mainly consist of two steps: we first construct a virtual grid network and select the minimal stop point set (SPS) from it; then, we make optimal scheduling for the MEs based on the SPS in order to minimize their traveling length. Different implementations of genetic algorithm (GA) are used to solve the problem. Our methods are evaluated by extensive simulations. The results show that these methods can greatly reduce the traveling length of MEs, and decrease the data collection latency.