Title: Optimal quality-level adaptation and performance evaluation for SLA-based VoIP services over DiffServ/MPLS networks

Authors: Hui-Kai Su

Addresses: Department of Electrical Engineering, National Formosa University, Yunlin 632, Taiwan

Abstract: This work proposes an optimal quality level adaptation mechanism based on contracted service level agreement (SLAs) and defines an optimal service policy for a Voice over IP (VoIP) application provider over DiffServ/MPLS networks. A VoIP application provider between VoIP users and network service providers faces the challenge of SLA mapping to maximise its profit and satisfy users' requirements adapts the quality level of each active call to new network conditions well, and maximises the profit under the constraints on the contracted SLAs. The contributions would help application providers develop call admission control (CAC) schemes and proprietary service policies efficiently.

Keywords: voice over IP; VoIP services; quality of service; QoS; service level agreements; SLA; DiffServ; MPLS; quality adaptation; performance evaluation; optimal service policy; call admission control; CAC schemes; proprietary service policies.

DOI: 10.1504/IJAACS.2012.046283

International Journal of Autonomous and Adaptive Communications Systems, 2012 Vol.5 No.2, pp.166 - 177

Published online: 05 Dec 2014 *

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