Analysis of delay and delay jitter of voice traffic in the Internet

Abstract

In the future, voice communication is expected to migrate from the public switched telephone network to the Internet. Because of the particular characteristics (low volume and burstiness) and stringent delay and loss requirements of voice traffic, it is important to separate voice traffic from other traffic in the network by providing it with a separate queue. In this study, we conduct a thorough assessment of voice delay in this context. We conclude that priority queuing is the most appropriate scheduling scheme for the handling of voice traffic, while preemption of non-voice packets is strongly recommended for sub-10 Mbit/s links. We also find that per-connection custom packetization is in most cases futile, i.e. one packet size allows a good compromise between an adequate end-to-end delay and an efficient bandwidth utilization for voice traffic.

Embedded Markov process based model for performance analysis of Intrusion Detection and Prevention Systems

“…In order to make the analytical solution feasible, we consider Poisson arrivals, exponential services, and fixed packet sizes. This applies only for certain types of traffic as reported in [20]. Considering other distributions and variable packet sizes is part of our future work.…”

Performance Evaluation and Delay Modelling of VoIP Traffic over 802.11 Wireless Mesh Network

“…in [17] have solved the problem of modeling the average delay in an IEEE 802.11 DCF wireless mesh network with a single root node under light aggregate traffic in Wireless Mesh Networks using M\M\1 Queue. In [18], authors have given various delay components to be aggregated to calculate the overall end to end delay for voice traffic. Literature review reveals that WMN has emerged as a useful technology for various real time applications.…”

“…The end to end delay D for VoIP traffic in wireless mesh network in one direction from sender to receiver can be represented by the expression [18]:…”

Deploying VoIP in Existing IP Networks

“…In literature 0.1% to 5% packet loss was generally asserted [8,[23][24][25]. However, in [26] the required VoIP packet loss was conservatively suggested to be less than 10 -5 . A more practical packet loss, based on experimentation, of below 1% was required in [24].…”