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Data reporting strategy in heterogeneous wireless sensor networks can be differentiated based on task-specific requirements. In this paper, we propose a novel two-phase data reporting (TDR) scheme that supports class-based QoS to sensor nodes in different priority classes. In the first phase, time slots are divided into separate data reporting round defined for each class, while in the second phase,...
Relaying data with the help of mobile elements seems an effective way to bridge the gaps in sparse sensor networks. In this paper, we propose the Voronoi-diagram-based mobile element scheduling (VDMES) algorithm to construct the shortest possible path for mobile elements. The mobile elements are scheduled to visit a small subset of Voronoi vertices rather than the sensor nodes, which is carefully...
Opportunistic scheduling algorithms are effective in exploiting channel variations and maximizing system throughput in multirate wireless networks. However, most scheduling algorithms ignore the per-user quality-of-service (QoS) requirements and try to allocate resources (for example, the time slots) among multiple users. This leads to a phenomenon commonly referred to as the exposure problem, wherein...
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