Title :
Voice-Over-IP Performance in UTRA Long Term Evolution Downlink
Author :
Puttonen, Jani ; Henttonen, Tero ; Kolehmainen, Niko ; Aschan, Kennett ; Moisio, Martti ; Kela, Petteri
Author_Institution :
Magister Solutions Ltd., Jyvaskyla
Abstract :
In this paper, we study voice-over-IP (VoIP) performance in UTRA long term evolution (LTE) downlink (DL). We have utilized fully dynamic system simulations to study the VoIP adaptive multi-rate (AMR) 12.2 codec capacity in four different 3GPP simulation cases. The effects of link adaptation (LA), packet bundling, control channel capacity and number of HARQ processes on VoIP capacity have also been considered. The results present the absolute VoIP capacity numbers of LTE DL. We also show that LA together with packet bundling provides clear gain on the VoIP capacity, because more VoIP packets can be scheduled in each TTI. Also, the control channel limitations can be effectively compensated by packet bundling.
Keywords :
3G mobile communication; Internet telephony; channel capacity; packet switching; radio links; 3GPP simulation; UTRA long term evolution downlink; VoIP capacity; adaptive multirate 12.2 codec capacity; control channel capacity; dynamic system simulation; link adaptation; packet bundling; voice-over-IP; Codecs; Delay; Downlink; Internet telephony; Long Term Evolution; Packet switching; Quality of service; Resource management; Scheduling; Telecommunication traffic;
Conference_Titel :
Vehicular Technology Conference, 2008. VTC Spring 2008. IEEE
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-1644-8
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2008.551
