|
|
Congestion avoidance, detection and alleviation in wireless sensor networks |
Wei-wei FANG*,1, Ji-ming CHEN2, Lei SHU3, Tian-shu CHU1, De-pei QIAN1 |
1 Sino-German Joint Software Institute, School of Computer Science, Beihang University, Beijing 100191, China
2 State Key Laboratory of Industrial Control Technology, Zhejiang University, Hangzhou 310027, China
3 Digital Enterprise Research Institute, National University of Ireland, Galway, Ireland
|
|
|
Abstract Congestion in wireless sensor networks (WSNs) not only causes severe information loss but also leads to excessive energy consumption. To address this problem, a novel scheme for congestion avoidance, detection and alleviation (CADA) in WSNs is proposed in this paper. By exploiting data characteristics, a small number of representative nodes are chosen from those in the event area as data sources, so that the source traffic can be suppressed proactively to avoid potential congestion. Once congestion occurs inevitably due to traffic mergence, it will be detected in a timely way by the hotspot node based on a combination of buffer occupancy and channel utilization. Congestion is then alleviated reactively by either dynamic traffic multiplexing or source rate regulation in accordance with the specific hotspot scenarios. Extensive simulation results under typical congestion scenarios are presented to illuminate the distinguished performance of the proposed scheme.
|
Received: 13 April 2009
Published: 30 November 2009
|
|
Fund: Project supported by the National Natural Science Foundation of
China (Nos. 60673180, 90412011 and 90612004), the International
Science and Technology Cooperative Program of China (No.
2006DFA11080), the Research Program of Federal Ministry of Edu-
cation and Research of Germany (No. 01BU0680), and the Lion
Project of Science Foundation of Ireland to Lei Shu (No. SFI/08/CE/
I1380) |
Congestion avoidance, detection and alleviation in wireless sensor networks
Congestion in wireless sensor networks (WSNs) not only causes severe information loss but also leads to excessive energy consumption. To address this problem, a novel scheme for congestion avoidance, detection and alleviation (CADA) in WSNs is proposed in this paper. By exploiting data characteristics, a small number of representative nodes are chosen from those in the event area as data sources, so that the source traffic can be suppressed proactively to avoid potential congestion. Once congestion occurs inevitably due to traffic mergence, it will be detected in a timely way by the hotspot node based on a combination of buffer occupancy and channel utilization. Congestion is then alleviated reactively by either dynamic traffic multiplexing or source rate regulation in accordance with the specific hotspot scenarios. Extensive simulation results under typical congestion scenarios are presented to illuminate the distinguished performance of the proposed scheme.
关键词:
Wireless sensor network (WSN),
Congestion control,
Correlation,
Traffic multiplexing,
Rate regulation
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|