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Sensors 2011, 11(4), 3418-3438; doi:10.3390/s110403418

A QoS-Guaranteed Coverage Precedence Routing Algorithm for Wireless Sensor Networks

1,* , 1
Received: 28 January 2011 / Revised: 9 March 2011 / Accepted: 21 March 2011 / Published: 24 March 2011
(This article belongs to the Special Issue Collaborative Sensors)
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For mission-critical applications of wireless sensor networks (WSNs) involving extensive battlefield surveillance, medical healthcare, etc., it is crucial to have low-power, new protocols, methodologies and structures for transferring data and information in a network with full sensing coverage capability for an extended working period. The upmost mission is to ensure that the network is fully functional providing reliable transmission of the sensed data without the risk of data loss. WSNs have been applied to various types of mission-critical applications. Coverage preservation is one of the most essential functions to guarantee quality of service (QoS) in WSNs. However, a tradeoff exists between sensing coverage and network lifetime due to the limited energy supplies of sensor nodes. In this study, we propose a routing protocol to accommodate both energy-balance and coverage-preservation for sensor nodes in WSNs. The energy consumption for radio transmissions and the residual energy over the network are taken into account when the proposed protocol determines an energy-efficient route for a packet. The simulation results demonstrate that the proposed protocol is able to increase the duration of the on-duty network and provide up to 98.3% and 85.7% of extra service time with 100% sensing coverage ratio comparing with LEACH and the LEACH-Coverage-U protocols, respectively.
Keywords: quality of service (QoS); routing algorithm; sensing coverage problem; wireless sensor network (WSN) quality of service (QoS); routing algorithm; sensing coverage problem; wireless sensor network (WSN)
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.

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Jiang, J.-A.; Lin, T.-S.; Chuang, C.-L.; Chen, C.-P.; Sun, C.-H.; Juang, J.-Y.; Lin, J.-C.; Liang, W.-W. A QoS-Guaranteed Coverage Precedence Routing Algorithm for Wireless Sensor Networks. Sensors 2011, 11, 3418-3438.

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