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Today, One of the most important performance measures in the new burst traffic gets to 3G and 4G systems is the End-to-End jitter. However, in order to study and analyze Jitter, many works and models have been devoted to estimate and evaluate this parameter. In this paper, analytical formulas for jitter of interrupted Poisson traffic (IPP) and MMPP-2 are presented. We provide Jitter approximation...
IEEE 802.11 is world widely established as the most popular protocol for Wireless Local Area Networks (WLANs). Voice over IP (VoIP) applications are widely spread due to their relatively low cost. Applying VoIP traffic on IEEE 802.11 WLANs introduces significant delays in the wireless medium due to the small size of voice packets. In this paper, we develop an analytical model for the IEEE 802.11 Distributed...
The quick market growth and ubiquitous acceptance of VoIP are primarily due to cheap service. VoIP services can be availed in mobile devices at a very low cost by employing IEEE 802.11 to provide last mile coverage. But call capacity is very low in these networks and call jitter occurs if voice quality requirements are not precisely met. We present a VoIP call capacity model for 802.11 networks which...
Circuit multiplication equipment optimized for IP-based networks (IP-CME) adopts such as multiplex, coding with vary bit rate and other low rate encoding to gain the same Quality of Service (QoS) with VoIP, at the same time reducing the overhead of packet, reducing processing loads of IP packet routing devices, optimizing resources of IP-based network. The base of researching IP-CME is the researching...
VoIP offers cheap voice communication which instigated its quick market growth. IEEE 802.11 WLANs offer cheap wireless coverage which can be used to provide VoIP service in mobile devices. But call capacity of such networks is very low compared to wired networks. To increase voice capacity in WLANs incorporation of power capture, increased data rate, and use of multiple channels are of great importance...
The transmission of the Voice over Internet protocol requires high quality of speech to update this service. VoIP signal quality can be degraded by network layer problems which includes delay, packet loss and jitter. But the frame loss while transmitting voice over internet services may generate audible distortion in the perceived speech quality. The simulation model of VoIP network under impairments...
This paper explores the perceptual effect of network delay jitters on consumers' quality of experience during packet-based VoIP conversations. Novel parametric speech quality models are proposed to faithfully capture speech quality impairment caused by network delay jitter and de-jittering buffer settings. The proposed models have been rigorously conceived following a regression analysis approach...
VoIP is rapidly growing and widely used real-time voice service. On the path through the packet-switched networks, the regularity of VoIP stream is impaired by routing, queuing, scheduling and serialization effects, consequently resulting in loss and delay jitter of packets. Achieving high quality real-time voice requires smoothing the delay jitter at the receiver which is generally done by means...
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