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Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/110580

Title:	On the Construction of Data Aggregation Tree with Minimum Energy Cost in Wireless Sensor Networks: NP-Completeness and Approximation Algorithm
Authors:	郭桐惟 Kuo, Tung-Wei;Lin, Kate Ching-Ju;Tsai, Ming-Jer
Contributors:	資科系
Keywords:	Approximation algorithms, Approximation methods, Relays, Routing, Wireless sensor networks, Sensors, Steiner trees
Date:	2015-12
Issue Date:	2017-06-29 09:43:24 (UTC+8)
Abstract:	In many applications, it is a basic operation for the sink to periodically collect reports from all sensors. Since the data gathering process usually proceeds for many rounds, it is important to collect these data efficiently, that is, to reduce the energy cost of data transmission. Under such applications, a tree is usually adopted as the routing structure to save the computation costs for maintaining the routing tables of sensors. In this paper, we work on the problem of constructing a data aggregation tree that minimizes the total energy cost of data transmission in a wireless sensor network. In addition, we also address such a problem in the wireless sensor network where relay nodes exist. We show these two problems are NP-complete, and propose O(1)-approximation algorithms for each of them. Simulations show that the proposed algorithms each have good performance in terms of the energy cost.
Relation:	IEEE Transactions on Computers,
Data Type:	article
DOI 連結:	http://dx.doi.org/10.1109/INFCOM.2012.6195659
DOI:	10.1109/INFCOM.2012.6195659
Appears in Collections:	[資訊科學系] 期刊論文

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