Abstract
In this paper, we investigate theIp protocol as a transport option for the user traffic in the UMTS Terrestrial Radio Access Network (Utran), where stringent delay bounds are to be met for both real-time and non real-time traffic. We focus on real-time voice traffic and present an analytical model for the multiplexing and transport of voice channels in theUtran usingIp. The novelty of our model is that it analytically includes and quantifies the performance of the timer used in multiplexing arriving Frame Protocol (Fp) frames into largerIp packets. We then validate our work through empirical results on a test-bed emulating theUtran transport functionalities. We show the trade-offs between performance, in terms of delay and link utilization, and quantify optimal values for the timer as well as the number ofFp frames perIp packet for a given output link capacity.
Résumé
Dans cet article, nous étudions les performances de I’Ip utilisé comme technologie de transport du trafic usager dans l’Utran (Umts Terrestrial Radio Access Network) où des bornes strictes sur le délai de transport doivent être respectées pour le trafic temps réel et aussi pour le trafic non temps réel. Nous nous concentrons sur le trafic voix et présentons un modèle analytique pour le multiplexage et le transport dans l’Utran de plusieurs canaux voix en utilisantIp. Notre modèle tient en compte l’emploi d’un temporisateur pour le remplissage des paquetsIp par les tramesFp voix. Nous validons empiriquement notre travail sur une plate-forme émulant les fonctionnalités de transport de l’Utran. Nos résultats montrent les compromis entre les performances, notamment l’utilisation de la bande passante et le délai, permettant de déterminer les valeurs optimales de la taille du paquetIp et du temporisateur, tout en satisfaisant la borne sur le délai pour une liaison de capacité déterminée.
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Samhat, A., Chahed, T. & Sabeur, M. IP-based transport of voice traffic in the UMTS radio access network: analytical study and empirical validation. Ann. Télécommun. 60, 610–629 (2005). https://doi.org/10.1007/BF03219939
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DOI: https://doi.org/10.1007/BF03219939
Keywords
- Mobile radiocommunication
- Universal Mobile Telecommunication System
- Voice overIp
- Access network
- Analytical method
- Validation
- Empirical method
- Multiplexing
- Quality of Service
- Emulator