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As renewable energy is intermittent and randomly distributed, it is difficult for energy harvesting enabled networks to reliably supply the time-varying mobile traffic. We propose a brand new approach of energy sharing and load shifting to overcome this issue. In this paper, we first investigate the user association (UA) problem with energy cooperation to minimize the grid energy expenditure of heterogeneous...
Directional sensors, such as cameras, are limited in their sensing angles, but are able to switch to different directions and cover the area of interest cooperatively. In directional sensor networks, how to prolong the network lifetime while satisfying certain coverage requirements is a fundamental problem since the sensors are powered by battery. In this paper, we propose scheduling schemes for directional...
E-healthcare systems of Wireless Body Area Network (WBAN) promise enormous change in future healthcare industry. The system generally consists of multiple sensor nodes that monitor various medical signals and deliver data to a network coordinator for further processing. One of the major issues of such systems is energy efficiency, owing to the limited power supply and difficult replacement of batteries...
In this paper, we address pursuit-evasion games with the auxiliary of wireless sensor network. Wireless sensor network can provide global information, such as the positions of evaders, for pursuers to improve the performance. However, some ready strategies cannot be used directly because of the positioning errors of wireless sensor network. By analyzing the performance of Lion Strategy, A Lion-Mirror-Tackle...
Decentralized channel state information is utilized to design a multichannel access algorithm for uplink transmission with power adaptation. The base station does not coordinate the transmissions of mobile users and hence users employ random access transmission. The situation is modeled as a non-cooperative game, where mobile users attempt to maximize its individual throughput gain with the least...
In this paper, we propose an efficient energy-management framework in wireless sensor networks (WSNs) to address the fundamental research challenge imposed by both the maintenance of the energy supply and the support of the quality-of-information (QoI) requirements. By quantifying the QoI benefit the tasks receive in relation to the level of QoI they request as the QoI satisfaction index), we propose...
Massive parallel computing performed on many-core Network-on-Chips (NoCs) is the future of the computing. One feasible approach to implement parallel computing is to deploy multiple applications on the NoC simultaneously. In this paper, we propose a multi-application mapping method starting with the application mapping which finds a region on the NoC for each application and then task mapping which...
Multi- and many-core architectures have become the mainstream computing platforms for implementing Systems-on-Chip (SoC). To efficiently utilize the abundant processing resources on future many-core Network-on-Chip (NoC) platforms, the design focus should shift from single-application to multi-application scenarios. In this paper, we propose a multiple application mapping algorithm which maps multiple...
This paper considers multiaccess control for the uplink in orthogonal-frequency-division-multiple-access (OFDMA) wireless networks. To avoid extensive information exchange with the access point in centralized approaches, we propose a distributed threshold-based scheme, where each user accesses multiple channels simultaneously based on a comparison between measured channel gains and a channel gain...
With the NoC size growing constantly, efficient algorithms are needed to provide power/performance-aware task mapping on massively parallel systems. In this paper a novel tree-model based mapping algorithm is proposed, to achieve high energy efficiency and low latency on NoC platforms. A NoC is abstracted as a tree composed of a root node and median nodes at different levels. By mapping tasks starting...
In this paper, a low power receiver utilizing a resonant transformer circuit at 20 GHz to decrease the antenna/system sizes to meet the smart dust system (SDS) millimeter size space requirement was designed. The resonator transformer generates relatively large voltages and facilitates diode-based demodulation. The receiver was designed for low power SDS applications at 20 GHz. The chip has been taped...
Clustering is an effective topology control approach in wireless sensor networks, which can prolong the lifetime and also improve the capability of networks. The main difference between different clustering protocols is the way in which to elect the CH (cluster head). This paper introduced several different phases in a round of a clustering protocol and how to determine the number of the clusters,...
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