Effects of hotspots on throughput in mobile ad hoc networks

Authors:
Jung-Shian Li;Chuan-Kai Kao;I-Hsuan Chen
Affiliations:
Department of Electrical Engineering Institute of Computer and Communication Engineering, National Cheng Kung University, Taiwan;Department of Electrical Engineering Institute of Computer and Communication Engineering, National Cheng Kung University, Taiwan;Department of Electrical Engineering Institute of Computer and Communication Engineering, National Cheng Kung University, Taiwan
Venue:
PDCN'07 Proceedings of the 25th conference on Proceedings of the 25th IASTED International Multi-Conference: parallel and distributed computing and networks
Year:
2007

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Abstract

In this paper, we study effects of hotspots on throughput in mobile ad hoc networks. A hotspot is a node causing network congestion. We first describe three types of hotspots: (a) delay-based, (b) energy-based, and (c) preferential-mobility-based. Nodes may exhibit delay or energy problems if an accident occurs in mobile ad hoc networks. Furthermore, certain nodes may be attractive to other nodes to follow them. Different types of hotspots may have different effects on network performance. We discuss effects of hotspots by various properties such as number of hotspots, clustering, placement, degree, etc. Powerful relays are useful to improve performance degradation due to hotspots. At last, we discuss performance of hotspots with powerful relays.