Sensors 2011, 11(3), 2505-2524; doi:10.3390/s110302505
Article

W-MAC: A Workload-Aware MAC Protocol for Heterogeneous Convergecast in Wireless Sensor Networks

Received: 30 November 2010; in revised form: 19 January 2011 / Accepted: 14 February 2011 / Published: 28 February 2011
(This article belongs to the Section Physical Sensors)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: The power consumption and latency of existing MAC protocols for wireless sensor networks (WSNs) are high in heterogeneous convergecast, where each sensor node generates different amounts of data in one convergecast operation. To solve this problem, we present W-MAC, a workload-aware MAC protocol for heterogeneous convergecast in WSNs. A subtree-based iterative cascading scheduling mechanism and a workload-aware time slice allocation mechanism are proposed to minimize the power consumption of nodes, while offering a low data latency. In addition, an efficient schedule adjustment mechanism is provided for adapting to data traffic variation and network topology change. Analytical and simulation results show that the proposed protocol provides a significant energy saving and latency reduction in heterogeneous convergecast, and can effectively support data aggregation to further improve the performance.
Keywords: wireless sensor network; heterogeneous convergecast; MAC protocol; TDMA
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MDPI and ACS Style

Xia, M.; Dong, Y.; Lu, D. W-MAC: A Workload-Aware MAC Protocol for Heterogeneous Convergecast in Wireless Sensor Networks. Sensors 2011, 11, 2505-2524.

AMA Style

Xia M, Dong Y, Lu D. W-MAC: A Workload-Aware MAC Protocol for Heterogeneous Convergecast in Wireless Sensor Networks. Sensors. 2011; 11(3):2505-2524.

Chicago/Turabian Style

Xia, Ming; Dong, Yabo; Lu, Dongming. 2011. "W-MAC: A Workload-Aware MAC Protocol for Heterogeneous Convergecast in Wireless Sensor Networks." Sensors 11, no. 3: 2505-2524.

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