Title :
QoS and Admission Probability Study for a SIP-Based Central Managed IP Telephony System
Author :
Saldana, Jose ; Murillo, Jenifer ; Fernández-Navajas, Julián ; Ruiz-Mas, José ; Navarro, Eduardo Viruete ; Aznar, José I.
Author_Institution :
Dept. IEC., Univ. Zaragoza, Zaragoza, Spain
Abstract :
This work presents a study of a SIP-based IP telephony system in terms of Quality of Service (QoS) and admission probability. The system is designed for an enterprise with offices in different countries. A software IP PBX maintains the dial plan, and SIP proxies are used in order to implement Call Admission Control (CAC) and to allow the sharing of the gateways´ lines. The system is implemented in a testbed where QoS parameters like One Way Delay (OWD), packet loss, jitter and ITU´s R-factor are measured. Simulation is also used in order to build a scenario with a big number of offices in which establishment delays and admission probability are measured.
Keywords :
Internet telephony; quality of service; signalling protocols; telecommunication computing; telecommunication congestion control; ITU R-factor; QoS; SIP; admission probability study; call admission control; central managed IP telephony system; jitter; one way delay; packet loss; quality of service; software IP PBX; Bandwidth; Delay; IP networks; Logic gates; Quality of service; Servers; Telephony;
Conference_Titel :
New Technologies, Mobility and Security (NTMS), 2011 4th IFIP International Conference on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-8705-9
Electronic_ISBN :
2157-4952
DOI :
10.1109/NTMS.2011.5720600
