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An underground wireless attendance system is designed based on radio frequency identification and wireless sensor network technology. The advantages of wireless sensor network have been applied in the attendance system, mainly solving the problems of wiring complexity and error-prone information collection, among other issues in the current attendance system. This system consists of radio frequency...
Reliability and energy efficiency are two key performance metrics in wireless body area network (WBAN) to meet the requirement of healthcare applications. The network architecture of WBAN has significant impact on transmission performance. In this paper, we investigate the network architecture through the measurement study of WBANs. In particular, we measure the performance achieved for star and multihop...
Energy efficient transmission and bit allocation schemes are investigated in multi-source single-sink wireless sensor networks (WSN). For transmission in AWGN channels with path loss, this work shows that the overall energy consumption can be saved if each source transmits using its minimum power and cooperates with other sources in TDMA mode. From the source coding perspective, the Slepian-Wolf coding...
In this paper, we propose a gateway system for wireless sensor network based on environmental monitoring. Resource sharing and long-distance accessing are important issues for application of wireless sensor network and environmental monitoring. Itpsilas necessary to connect wireless sensor network to external network which makes the administrator could access data duly and expediently from long-distance...
Networks with multiple source-destination pairs, involving possibly multicast, and where there are multiple nodes that can serve as potential relay nodes, are considered. A multisource, multirelay coding scheme is developed. In this scheme, each source's information is sent to its destination nodes via a multirelay route, with the multiple multirelay routes operating concurrently even when they intersect...
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