Study of delay patterns of weighted voice traffic of end‐to‐end users on the VoIP network

Abstract

In this paper we study delay patterns of weighted voice traffic of end-to-end users on the Voice over Internet Protocol (VoIP) network. We compare the delay performance of voice traffic which varies with queue management techniques such as First-In First-Out (FIFO) and Weighted Fair Queuing (WFQ) and voice codec algorithms such as G.723 and G.729 and select an optimal algorithm.

On the deployment of VoIP in Ethernet networks: methodology and case study

“…However, with little compromise to quality, it is possible to implement different ITU-T codecs that yield much less required bandwidth per call and relatively a bit higher, but acceptable, end-to-end delay. This can be accomplished by applying compression, silence suppression, packet loss concealment, queue management techniques, and encapsulating more than one voice packet into a single Ethernet frame [3,9,[16][17][18][19][20][21].…”

“…VoIP requires almost no packet loss. In literature, 0.1-5% packet loss was generally asserted [6,[21][22][23]. However, in [24] the required VoIP packet loss was conservatively suggested to be less than 10 K5 .…”

Deploying VoIP in Existing IP Networks

“…However, with little compromise to quality, it is possible to implement different ITU-T codecs that yield much less required bandwidth per call and relatively a bit higher, but acceptable, end-to-end delay. This can be accomplished by applying compression, silence suppression, packet loss concealment, queue management techniques, and encapsulating more than one voice packet into a single Ethernet frame [5,11,[18][19][20][21][22][23]. Figure 2 illustrates the sources of delay for a typical voice packet.…”

“…VoIP requires almost no packet loss. 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 .…”

Performance Evaluation of QoS Provisioning Techniques for VoIP

“…QoS can be defined as the ability of a network to provide consistent and predictable service to certain traffic type in an IP network in order to give a guaranteed end-to-end service. According to [2,3], important QoS parameters for VoIP include: * Delay: The mouth-to-ear (M2E) delay consists of delays accumulated during packetization, serialization, propagation, dejittering, and queuing. ITU G. 114 specification recommends one-way end-to-end delay to be less than 150 ms for high quality VoIP calls.…”