A warning based preemptive routing scheme for QoS maintenance in wireless ad hoc networks

Authors:
Sk Mohammad Rokonuzzaman;Ronald Pose;Iqbal Gondal
Affiliations:
Monash University, Melbourne, Australia;Monash University, Melbourne, Australia;Monash University, Melbourne, Australia
Venue:
Proceedings of the 6th ACM symposium on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks
Year:
2009

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Abstract

Traditional QoS routing protocols find paths that meet the QoS requirements while discovering routes. The chosen route is used while the QoS is met. If the QoS is violated rerouting takes place. Violation of QoS may be unacceptable for delay sensitive traffic. We introduce a preemptive QoS re-routing scheme. The end-to-end delay of packets in each session is monitored and if it seems likely that QoS violation might occur, a preemptive QoS rerouting process is initiated. This helps maintain QoS in dynamic wireless ad hoc networks. Schemes for triggering QoS re-routing are investigated. We have reduced the number of late packets and improved the overall end-to-end delay of the communications.