TAILIEUCHUNG - Báo cáo hóa học: " Research Article Determining Localized Tree Construction Schemes Based on Sensor Network Lifetime"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Determining Localized Tree Construction Schemes Based on Sensor Network Lifetime | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 350198 13 pages doi 2010 350198 Research Article Determining Localized Tree Construction Schemes Based on Sensor Network Lifetime Jae-Joon Lee 1 Bhaskar Krishnamachari 2 and . Jay Kuo2 1Jangwee Research Institute for National Defence Ajou University Suwon 443-749 Republic of Korea 2 Department of Electrical Engineering University of Southern California Los Angeles 90089-2564 CA USA Correspondence should be addressed to Jae-Joon Lee jjnlee@ Received 27 October 2009 Revised 2 June 2010 Accepted 1 July 2010 Academic Editor Yu Wang Copyright 2010 Jae-Joon Lee et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. The communication energy consumption in a data-gathering tree depends on the number of descendants to the node of concern as well as the link quality between communicating nodes. In this paper we examine the network lifetime of several localized tree construction schemes by incorporating the communication overhead due to imperfect link quality. Our study is conducted based on empirical data obtained from a real-world deployment which is further supported by mathematical analysis. For the case of a sparse node density a large network size and a low link threshold we show that the link-quality-based scheme provides the longer network lifetime than the minimum hop routing schemes. We present a lower bound on the number of nodes per hop and the link quality threshold of the radio range which work together to result in a superior localized scheme for longer network lifetime. 1. Introduction For data-gathering path construction nodes have to determine the next node to forward the data to the sink with a parent selection strategy. A localized tree construction scheme allows .

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