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Reliability is one of the most important communication metrics in wireless body area networks especially for medical applications. However, traditional one-hop transmission power control methods failed to guarantee the reliability when the transmission distance is large. Two-hop relaying transmission can provide reliable transmission but energy consumptions for relay nodes are high resulting in the...
An Energy-efficient Node Selection (ENS) mechanism has been proposed to improve the localization precision of target tracking with low computational complexity and energy consumption. The localization is based on wireless multimedia sensor network with cellular topology. The ENS mechanism utilizes the Global Node Selection algorithm in Energy-based acoustic source localization (GNSE) and the Closest...
Energy efficiency is a key problem of wireless sensor networks. Though we already have many self-organization protocols which can build energy-saving structures, the energy cost of maintenance also must be concerned. We found that organized network structure has great impact on the energy cost in the maintenance stage and the overall energy efficiency. In this paper, we classify the self-organization...
An important feature of the difference between wireless sensor networks and traditional wireless networks is that energy of sensor node is limited. Therefore, how to design energy efficient sensor network system has been the focus of the study in related fields. Now there are many self-organization protocols in wireless sensor networks, but most only take the initial energy consumption into account...
Existing cooperative schemes in which cluster head selects its neighboring intra-cluster nodes to collaboratively transmit its data can obtain higher energy efficiency in cluster-based wireless sensor networks (WSNs), but it brings lower spectrum efficiency. In this paper, we propose a novel cooperative transmission scheme based on code superposition in cluster-based WSNs. This scheme doesnpsilat...
In this paper, we propose a novel cooperative node selection scheme in wireless sensor networks that operate in energy-constrained environment. This scheme can obtain higher energy efficiency than the traditional cooperative transmission, which only considers the residual energy of intra-cluster nodes or the channel condition. Our proposed scheme will combine the residual energy with the link quality...
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