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Study on appropriate voice data length of IP packets for VoIP network adjustment

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4 Author(s)
Oouch, H. ; NTT Network Syst. Dev. Center, Tokyo, Japan ; Takenaga, T. ; Sugawara, H. ; Masugi, M.

This paper evaluates suitable voice-data length in IP packets for the adjustment of VoIP network systems. Based on measurements In a real environment, we examined the voice-quality level while varying the voice-data length of IP packets under various network conditions. We found that a VoIP system with long-voice data has high-transmission efficiency but there is a high deterioration in the voice-quality level in an inferior network. We also discovered that a VoIP system with short-voice data is tolerant to packet losses and preserves voice quality. Based on these results, we propose a VoIP system that sets the voice-data length of IP packets according to dynamically changing network QoS conditions to achieve both high-transmission efficiency and stable voice quality.

Published in:

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE  (Volume:2 )

Date of Conference:

17-21 Nov. 2002