Voice-Over-IP Performance in UTRA Long Term Evolution Downlink

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), pa...

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Published inVTC Spring 2008 - IEEE Vehicular Technology Conference pp. 2502 - 2506
Main Authors Puttonen, J., Henttonen, T., Kolehmainen, N., Aschan, K., Moisio, M., Kela, P.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2008
Subjects
Codecs
Delay
Downlink
Internet telephony
Long Term Evolution
Packet switching
Quality of service
Resource management
Scheduling
Telecommunication traffic
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Summary: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.
ISBN:1424416442
9781424416448
ISSN:1550-2252
DOI:10.1109/VETECS.2008.551