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

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.