Collision avoidance slot allocation scheme for multi-cluster wireless sensor networks

Authors:
Mustafa Al-Shawaqfeh;Ahmad Abu-El-Haija;Mohammad J. Abdel Rahman
Affiliations:
Communication Engineering Department, German Jordanian University, Amman, Jordan;Department of Electrical Engineering, Jordan University of Science and Technology, Irbid, Jordan;Department of Electrical and Computer Engineering, University of Arizona, Tucson, USA 85721
Venue:
Wireless Networks
Year:
2013

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Abstract

This paper introduces a collision avoidance slot allocation scheme for Time Division Multiple Access (TDMA) based Medium Access Control (MAC) in multi-cluster wireless sensor networks. TDMA MAC protocols have built-in active-sleep duty cycle that can be leveraged for limiting idle listening. Also, they can overcome the overhearing problem, thus have better energy efficiency. Enabling concurrent intra-cluster communications using a single radio channel is a key issue in TDMA MAC protocols. Using orthogonal frequency channels or different Code Division Multiple Access codes for different adjacent clusters can solve the problem at the expense of cost. In this paper, we propose a new distributed slot allocation protocol called Coordinated Time Slot Allocation (CTSA) that can reduce collisions significantly using a single radio channel. We use simulations to study the effects of different system parameters on the performance of our proposed protocol. Simulation results show that applying CTSA over clustering protocols can significantly reduce collisions. It also shows fast convergence for our proposed CTSA protocol. In this paper we apply our CTSA scheme to the Low Energy Adaptive Clustering Hierarchy protocol which forms the basis for many cluster based routing protocols. CTSA is also compared with the SRSA algorithm proposed by Wu and Biswas (Wirel Netw 13(5):691---703, 2007) by means of simulation.