期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2015
卷号：3
期号：3
DOI：10.15680/ijircce.2015.0303168
出版社：S&S Publications
摘要：we investigate the following fundamental question - how fast can information be collected from awireless sensor network organized as tree structure? To address this, we discover and evaluate a number of differenttechniques using realistic simulation models under the many-to-one communication paradigm known as convergecast.We primarily consider time scheduling on a single frequency channel with the aim of minimizing the number of timeslots required (schedule length) to complete a convergecast. Secondarily, we combine scheduling with transmissionpower control to mitigate the effects of interference, and illustrate that while power control helps in reducing theschedule length under a single frequency. We also illustrate the performance of various channel assignment methodsand find empirically that for moderate size networks of about 80 nodes, the use of multi-frequency scheduling cansuffice to eliminate most of the interference. The data collection rate is no longer remains limited by interference but bythe topology of the routing tree. To this conclude we construct degree-constrained spanning trees and capacitatedminimal spanning trees. Finally, we evaluate the impact of different interference and channel models on the schedulelength.
关键词：TDMA scheduling; Converge cast; multiple channels; power-control; routing trees
