Research Article
QoS Measurement-Based CAC for an IP Telephony System
@INPROCEEDINGS{10.1007/978-3-642-10625-5_1, author={Jos\^{e} Salda\`{o}a and Jos\^{e} Aznar and Eduardo Viruete and Juli\^{a}n Fern\^{a}ndez-Navajas and Jos\^{e} Ruiz}, title={QoS Measurement-Based CAC for an IP Telephony System}, proceedings={Quality of Service in Heterogeneous Networks. 6th International ICST Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness, QShine 2009 and 3rd International Workshop on Advanced Architectures and Algorithms for Internet Delivery and Applications, AAA-IDEA 2009, Las Palmas, Gran Canaria, November 23-25, 2009 Proceedings}, proceedings_a={QSHINE}, year={2012}, month={10}, keywords={IP Telephony VoIP CAC MBAC SIP virtualization QoS}, doi={10.1007/978-3-642-10625-5_1} }- José Saldaña
José Aznar
Eduardo Viruete
Julián Fernández-Navajas
José Ruiz
Year: 2012
QoS Measurement-Based CAC for an IP Telephony System
QSHINE
Springer
DOI: 10.1007/978-3-642-10625-5_1
Abstract
This work presents a Call Admission Control (CAC) system for a SIP-based IP Telephony platform. Configured for a multi-branch enterprise environment, the system enables international calls to be established in two steps: one step using Voice over IP (VoIP) through the Internet between the local office and a VoIP-PSTN gateway placed at destination country, and a second step by means of PSTN, from the gateway to the end-user, accounted with local tariffs. CAC decisions are based on Quality of Service (QoS) measurements, call tariffs and also on the number of available lines in the gateway. The CAC has been implemented within a test platform based on virtualization. Measurements to evaluate and validate CAC’s impairment on call establishment delays have been obtained.