Title :
An Efficient Algorithm for Constructing Maximum lifetime Tree for Data Gathering Without Aggregation in Wireless Sensor Networks
Author :
Liang, Junbin ; Wang, Jianxin ; Cao, Jiannong ; Chen, Jianer ; Lu, Mingming
Author_Institution :
Sch. of Inf. Sci. & Eng., Central South Univ., Changsha, China
Abstract :
Data gathering is a broad research area in wireless sensor networks. The basic operation in sensor networks is the systematic gathering and transmission of sensed data to a sink for further processing. The lifetime of the network is defined as the time until the first node depletes its energy. A key challenge in data gathering without aggregation is to conserve the energy consumption among nodes so as to maximize the network lifetime. We formalize the problem of tackling the challenge as to construct a min-max-weight spanning tree, in which the bottleneck nodes have the least number of descendants according to their energy. However, the problem is NP-complete. A ¿(log n/log/log n)-approximation algorithm MITT is proposed to solve the problem without location information. Simulation results show that MITT can achieve longer network lifetime than existing algorithms.
Keywords :
computational complexity; energy consumption; minimax techniques; trees (mathematics); wireless sensor networks; NP-complete; data gathering; energy consumption; maximum lifetime tree; min-max-weight spanning tree; network lifetime; systematic gathering; systematic transmission; wireless sensor networks; Communications Society; Computer networks; Computer science; Data engineering; Energy consumption; Information science; Peer to peer computing; Protocols; USA Councils; Wireless sensor networks;
Conference_Titel :
INFOCOM, 2010 Proceedings IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-5836-3
DOI :
10.1109/INFCOM.2010.5462181