Browsing by Author "Lai, Wei Kuang"

Now showing 1 - 2 of 2

A Field Wireless Sensor System for Mangrove Ecology Environment in Taiwan: Design and Implementation
(2012)
Lin, Mei-Hsien
;
Kung, Hsu-Yang
;
Li, Chia-Ling
;
Chen, Chi-Hua
;
Lai, Wei Kuang
This study is the first investigation of using wireless sensor networks (WSNs) for Mangroves protection and observation in Taiwan. In this paper, this study proposes a natural ecology sensing system (NESS), which consists of ecological environment sensor (EES), nature resource integrated computing server (NRICS), mobile user (MU), and ecological information service system (EISS). NESS can improve the traditional long-term observation method by providing a real-time and networked surveillance system. This paper considers the practical issues of deploying ecological environment sensors in the Mangroves protection area. In additions, feasible solutions are proposed to achieve sustainable energy supply and reliable data delivery with high accuracy. We also evaluate system performance in terms of energy consumption and packet loss rate at different duty cycles, and compare lifetime and data accuracy with different energy supply sources. According to implementation results, the proposed system is efficient and feasible for Mangroves observation, protection, and surveillance. [Mei-Hsien Lin, Hsu-Yang Kung, Chia-Ling Li, Chi-Hua Chen, Wei Kuang Lai. A Field Wireless Sensor System for Mangrove Ecology Environment in Taiwan: Design and Implementation. Life Sci J 2012;9(4):5759-5767] (ISSN:1097-8135). http://www.lifesciencesite.com. 857
Efficient Cluster Radius and Transmission Ranges in Corona-based Wireless Sensor Networks
(2014-04-29)
Lai, Wei Kuang
;
Fan, Chung-Shuo
;
Shieh, Chin-Shiuh
;
資訊工程學系
;
Department of Computer Science
In wireless sensor networks (WSNs), hierarchical clustering is an efficient approach for lower energy consumption and extended network lifetime. In cluster-based multi-hop communications, a cluster head (CH) closer to the sink is loaded heavier than those CHs farther away from the sink. In order to balance the energy consumption among CHs, we development a novel cluster-based routing protocol for corona-structured wireless sensor networks. Based on the relaying traffic of each CH conveys, adequate radius for each corona can be determined through nearly balanced energy depletion analysis, which leads to balanced energy consumption among CHs. Simulation results demonstrate that our clustering approach effectively improves the network lifetime, residual energy and reduces the number of CH rotations in comparison with the MLCRA protocols.