Title :
UMTS-to-IP QoS mapping for voice and video telephony services
Author :
Ali, R.B. ; Pierre, Samuel ; Lemieux, Yves
Author_Institution :
Ecole Polytech. de Montreal, Que., Canada
Abstract :
Quality of service mapping between UMTS services and IP transport is crucial for maintaining a suitable end-to-end delay for emerging UMTS multimedia telephony. However, due to incompatibilities in QoS classifications within these two technologies, straightforward mapping is impossible and current proposals within the 3GPP could lead to unpredictable and undesirable behavior for certain services. In this article we focus on two very important UMTS services, voice and video telephony, and establish the QoS issues that exist for these services. We then propose a refined QoS mapping that differentiates between the transmission of voice and video-telephony and a weighted fair queuing scheduler to schedule the transmissions. Through a simulation study, we show the effect on the queuing delays of both traffic types when their WFQ weights vary and then derive an optimal weight that provides the best overall delays for multimedia telephony services.
Keywords :
3G mobile communication; IP networks; delays; multimedia communication; quality of service; queueing theory; scheduling; telecommunication traffic; videotelephony; 3GPP; UMTS-to-IP QoS mapping; Universal Mobile Telecommunication System; end-to-end delay; multimedia telephony; quality of service; queuing delay; traffic type; video telephony service; voice telephony service; weighted fair queuing scheduler; 3G mobile communication; Admission control; Asynchronous transfer mode; Delay effects; Diffserv networks; IP networks; Multiprotocol label switching; Quality of service; Telephony; Traffic control;
Journal_Title :
Network, IEEE
DOI :
10.1109/MNET.2005.1407695
