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Sensors 2015, 15(9), 24026-24053; doi:10.3390/s150924026

Energy Efficient Medium Access Control Protocol for Clustered Wireless Sensor Networks with Adaptive Cross-Layer Scheduling

1
Discipline of Electrical, Electronic and Computer Engineering, University of KwaZulu Natal, Durban 4041, South Africa
2
School of Electrical and Information Engineering, University of Witwatersrand, Johannesburg 2000, South Africa
*
Author to whom correspondence should be addressed.
Academic Editor: Davide Brunelli
Received: 11 March 2015 / Revised: 21 July 2015 / Accepted: 21 July 2015 / Published: 18 September 2015
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Abstract

This paper presents an Energy Efficient Medium Access Control (MAC) protocol for clustered wireless sensor networks that aims to improve energy efficiency and delay performance. The proposed protocol employs an adaptive cross-layer intra-cluster scheduling and an inter-cluster relay selection diversity. The scheduling is based on available data packets and remaining energy level of the source node (SN). This helps to minimize idle listening on nodes without data to transmit as well as reducing control packet overhead. The relay selection diversity is carried out between clusters, by the cluster head (CH), and the base station (BS). The diversity helps to improve network reliability and prolong the network lifetime. Relay selection is determined based on the communication distance, the remaining energy and the channel quality indicator (CQI) for the relay cluster head (RCH). An analytical framework for energy consumption and transmission delay for the proposed MAC protocol is presented in this work. The performance of the proposed MAC protocol is evaluated based on transmission delay, energy consumption, and network lifetime. The results obtained indicate that the proposed MAC protocol provides improved performance than traditional cluster based MAC protocols. View Full-Text
Keywords: medium access control (MAC); scheduling; diversity; channel quality indicator; intra-cluster; inter-cluster medium access control (MAC); scheduling; diversity; channel quality indicator; intra-cluster; inter-cluster
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. (CC BY 4.0).

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MDPI and ACS Style

Sefuba, M.; Walingo, T.; Takawira, F. Energy Efficient Medium Access Control Protocol for Clustered Wireless Sensor Networks with Adaptive Cross-Layer Scheduling. Sensors 2015, 15, 24026-24053.

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