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Sensors 2017, 17(9), 1931;

A Fair Contention Access Scheme for Low-Priority Traffic in Wireless Body Area Networks

Department of Computer Science, Bahria University, Islamabad 44000, Pakistan
Current Address: Shagufta Henna, Department of Computer Science, Bahria University, Shangrilla Road, Sector E-8, Islamabad 44000, Pakistan.
Author to whom correspondence should be addressed.
Received: 7 July 2017 / Accepted: 1 August 2017 / Published: 23 August 2017
(This article belongs to the Section Sensor Networks)
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Recently, wireless body area networks (WBANs) have attracted significant consideration in ubiquitous healthcare. A number of medium access control (MAC) protocols, primarily derived from the superframe structure of the IEEE 802.15.4, have been proposed in literature. These MAC protocols aim to provide quality of service (QoS) by prioritizing different traffic types in WBANs. A contention access period (CAP)with high contention in priority-based MAC protocols can result in higher number of collisions and retransmissions. During CAP, traffic classes with higher priority are dominant over low-priority traffic; this has led to starvation of low-priority traffic, thus adversely affecting WBAN throughput, delay, and energy consumption. Hence, this paper proposes a traffic-adaptive priority-based superframe structure that is able to reduce contention in the CAP period, and provides a fair chance for low-priority traffic. Simulation results in ns-3 demonstrate that the proposed MAC protocol, called traffic- adaptive priority-based MAC (TAP-MAC), achieves low energy consumption, high throughput, and low latency compared to the IEEE 802.15.4 standard, and the most recent priority-based MAC protocol, called priority-based MAC protocol (PA-MAC). View Full-Text
Keywords: WBAN; MAC superframe structure; low-priority traffic; priority-based MAC; PA-MAC WBAN; MAC superframe structure; low-priority traffic; priority-based MAC; PA-MAC

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Henna, S.; Sajeel, M.; Bashir, F.; Asfand-e-yar, M.; Tauqir, M. A Fair Contention Access Scheme for Low-Priority Traffic in Wireless Body Area Networks. Sensors 2017, 17, 1931.

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