Research Article
PQoS-driven VoIP Service Adaptation in UMTS Networks
@INPROCEEDINGS{10.4108/ICST.SIMUTOOLS2009.5732, author={Nagore Bilbao and Jose Oscar Fajardo and Fidel Liberal}, title={PQoS-driven VoIP Service Adaptation in UMTS Networks}, proceedings={2nd International ICST Workshop on the Evaluation of Quality of Service through Simulation in the Future Internet}, publisher={ACM}, proceedings_a={QOSIM}, year={2010}, month={5}, keywords={VoIP perceived QoS E-model SIP signalling real-time adaptation}, doi={10.4108/ICST.SIMUTOOLS2009.5732} }- Nagore Bilbao
Jose Oscar Fajardo
Fidel Liberal
Year: 2010
PQoS-driven VoIP Service Adaptation in UMTS Networks
QOSIM
ICST
DOI: 10.4108/ICST.SIMUTOOLS2009.5732
Abstract
This paper shows the relevance of implementing a dynamic and real-time Voice over IP (VoIP) service adaptation mechanism in order to avoid Perceived Quality of Service (PQoS) degradations. We have studied the most relevant parameters affecting the PQoS experienced by end users in VoIP services over mobile accesses. We will describe the enhancements carried out in the implementation of the simulation model in order to assess VoIP PQoS based on ITU-T E-model and introduce a real-time service adaptation method. This adaptation method involves codec and packetization changes through SIP signalling, jointly to dejittering buffer management, and would be launched upon detection of PQoS degradation, in order to enhance end users’ experience.
