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Sensors 2010, 10(9), 8761-8781; doi:10.3390/s100908761

Load-Adaptive Practical Multi-Channel Communications in Wireless Sensor Networks

*  and
Department of Computer Engineering, Kyung Hee University, 1 Seocheon, Giheung, Yongin, Gyeonggi 449-701, Korea
* Author to whom correspondence should be addressed.
Received: 19 August 2010 / Revised: 14 September 2010 / Accepted: 15 September 2010 / Published: 21 September 2010
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In recent years, a significant number of sensor node prototypes have been designed that provide communications in multiple channels. This multi-channel feature can be effectively exploited to increase the overall capacity and performance of wireless sensor networks (WSNs). In this paper, we present a multi-channel communications system for WSNs that is referred to as load-adaptive practical multi-channel communications (LPMC). LPMC estimates the active load of a channel at the sink since it has a more comprehensive view of the network behavior, and dynamically adds or removes channels based on the estimated load. LPMC updates the routing path to balance the loads of the channels. The nodes in a path use the same channel; therefore, they do not need to switch channels to receive or forward packets. LPMC has been evaluated through extensive simulations, and the results demonstrate that it can effectively increase the delivery ratio, network throughput, and channel utilization, and that it can decrease the end-to-end delay and energy consumption.
Keywords: wirelss sensor networks; multi-channel; load detection; channel allocation and deallocation wirelss sensor networks; multi-channel; load detection; channel allocation and deallocation
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Islam, M.S.; Alam, M.M.; Hong, C.S.; Lee, S. Load-Adaptive Practical Multi-Channel Communications in Wireless Sensor Networks. Sensors 2010, 10, 8761-8781.

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