Simulation and Analysis of Quality of Service (QoS) Parameters of Voice over IP (VoIP) Traffic through Heterogeneous Networks (original) (raw)

Quality of Service Issues in Wireless Voice Over Internet Protocol

International Journal of Advanced Research in Computer Science and Software Engineering

Voice over Internet Protocol (VoIP) is a significant application of the converged network principle where the voice traffic is routed over Internet Protocol shared traffic networks. VoIP traffic was modelled over wireless network and a simulation of the traffic was transmitted over the network. E-model technique was used to analyze the traffic data and also to rate VoIP QoS parameters. The result achieved was mapped to the Mean Opinion Scale to determine the Quality of Service of VoIP over wireless networks. The results shows that QoS in the VoIP communications is significantly impacted by these parameters and the impact varies according to the parameters and also the communication aspects selected for the VoIP traffic analysis.Keywords: VoIP, QoS, E-Model and Mean Opinion Scale

Analysis of QoS of VoIP Traffic through WiFi-UMTS Networks

Simulation of VoIP (Voice over Internet Protocol) traffic through UMTS (Universal Mobile Telecommunication System) and WiFi (IEEE 802.11x) alone and together are analysed for Quality of Service (QoS) performance. The average jitter of VoIP transiting the WiFi-UMTS network has been found to be lower than that of either solely through the WiFi and the UMTS networks. It is normally expected to be higher than traversing through the WiFi network only. Both the MOS (Mean Opinion Score) and the packet end-to-end delay were also found to be much lower than expected through the heterogeneous WiFi-UMTS network.

Performance Evaluation of VoIP QoS Parameters Using WiFi-UMTS Networks

Transactions on Engineering Technologies, 2015

Simulation of VoIP (Voice over Internet Protocol) traffic through UMTS (Universal Mobile Telecommunication System) and WiFi [Wireless Fidelity] (IEEE 802.11x) in isolation and combined are analysed for the overall Quality of Service (QoS) performance. The average jitter of the VoIP traffic transiting the WiFi-UMTS network has been found to be lower than that of either solely through the WiFi and the UMTS networks. It is normally expected to be higher than traversing through the WiFi network only. Both the subjective MOS (Mean Opinion Score) and the objective packet end-to-end delay were also found to be much lower than expected through the heterogeneous WiFi-UMTS network.

Comparisons of QoS in VoIP over WIMAX by Varying the Voice codes and Buffer size

International Journal of Computer Applications Technology and Research

Voice over Internet Protocol (VoIP) is developed for voice communications system based on voice packets transmitted over IP network with real-time communications of voice across networks using the Internet protocols. Quality of Service (QoS) mechanism is applied to guarantee successful voice packets transmitted over IP network with reduced delay or drop according to assigned priority of voice packets. In this paper, the goal of simulation models is present to investigate the performance of VoIP codecs and buffer size for improving quality of service (QoS) with the simulation results by using OPNET modeler version 14.5. The performance of the proposed algorithm is analyzed and compared the quality of service for VoIP. The final simulated result shows that the VoIP service performance best under G.729 voice encoder scheme and buffer size 256 Kb over WiMAX network.

Performance Analysis for VOIP over WiMAX Network

Voice over internet protocol (VOIP) was been important technology for service providers because it has real time services. VOIP is a gigantism technology .its facility dispatch of voice data over Internet Protocol .This paper is study the performance of VoIP traffic over WiMAX networks. The vestige of various voice codec and statistical distribution for VoIP over WiMAX has been studied in detail [2] .there is a Parameters that beckon the Quality of Service such as throughput, delay, jitter and loss with obeisance to Silence Detection (SD) or Voice Activity Detection (VAD) in voice codec G.729.[2] The simulation result beckon that the pareto distribution in inter arrival time has a important vestige on the performance of VoIP in WiMAX network.[1]

A Solution for Evaluating the QoS of Voice over IP

Solutions, Methods, and Applications

In this chapter, we present a solution for evaluating the Quality of Services (QoS) of Voice over Internet Protocol (VoIP). First, we present an introduction to the main concepts and mathematical background relating to QoS and Internet Protocol (IP) traffic nature, which subsequently are used in the measurements, analysis, and modeling of VoIP traffic. Secondly, we analyze network measurements and the result of the simulation in order to characterize the VoIP traffic nature. As results of this analysis, it is shown that VoIP jitter can be modeled by alpha-stable distributions and self-similar processes, with either Short or Long Range Dependence (i.e., SRD or LRD). Thirdly, we investigate the packet loss effects on the VoIP jitter, and present a methodology for simulating packet loss on VoIP jitter. Finally, we found an empirical relationship between the Hurst parameter (H) and the Packet Loss Rate (PLR); this relationship is based on voice traffic measurements and can be modeled by means of a power-law function with three fitted parameters.

QoS of VOIP Over Broadband Network

International Journal of Engineering and Management Research, 2019

The paper discussed the implementation of the use of Voice over Internet Protocol services, which is resulting in the enormous growth of broadband network. The main objective of this paper is to evaluate the QoS of VOIP for different broad band networks. Wired, Wireless Local Area Network (WLAN), Worldwide Interoperability for Microwave Access (WiMAX) and Universal Mobile Telecommunication System (UMTS) networks were implemented in OPNET Modeler The quality is compared using different QoS parameters such as end-to-end delay, Mean Opion Score (MOS), throughput and jitter. The VoIP codes used in the measurements of QoS is G.729A with sampling rate of 8 kbps .The results analyzed and the performance evaluated will give network operators an opportunity to select the codec for better services of VoIP for customer satisfaction.

VOIP PERFORMANCE OVER BROADBAND WIRELESS NETWORKS UNDER STATIC AND MOBILE ENVIRONMENTS

airccse.org

Voice over IP is expected to be very promising application in the next generation communication networks. The objective of this paper is to analyse the VoIP performance among the most competing next generation wireless networks like WiMAX, WLAN and its integrated frameworks etc. WiMAX having higher bandwidth provides higher capacity but with degraded quality of service while WLAN provides low capacity and coverage. Hence, an integrated network using WiMAX backbone and WLAN hotspots has been developed and VoIP application has been setup. As OPNET 14.5.A provides a real life simulation environment, we have opted OPNET as the simulation platform for all performance studies in this work. Quality of the service is critically analysed with parameters like jitter, MOS and delay for various voice codecs in the aforesaid networks for both fixed and mobile scenario. Finally, it is observed and concluded that the WiMAX-WLAN integrated network provides improved and optimal performance over WLAN and WiMAX network with respect to network capacity and quality of service. Exhaustive simulation results have been provided.

Comparison of Voice over Internet Protocol (VoIP) Performances in Various Network Topologies

Buletin Pos dan Telekomunikasi, 2020

VoIP is a digital communication technology that is currently developing because VoIP can be implemented on several network topologies, such as bus, star, and ring. Each of these topologies has advantages and disadvantages. So, a study is required to find out in which topology can VoIP be implemented optimally. In this research, VoIP is implemented in several topologies and furthermore the performance measurements are carried out for each topology. VQ manager is installed in order to measure the VoIP performance. For the server, we used Elastix and for the node implementation network topologies, we use several access points. From the results of the research, the performance of VoIP implemented in the star topology produces QoS that is better than other topologies with a delay value of 185 ms, 18 ms jitter, and 1% packet loss. This happens because in the star topology, all packets are distributed centrally. It is expected that the results of this research can be used as a reference in the application of VoIP technology in several types of topologies.

Analysis of VoIP Traffic in WiMAX Environment

Worldwide Interoperability for Microwave Access (WiMAX) is currently one of the hottest technologies in wireless communication. It is a standard based on the IEEE 802.16 wireless technology that provides a very high throughput broadband connections over long distances. In parallel, Voice Over Internet Protocol (VoIP) is a new technology which provides access to voice communication over internet protocol and hence it is becomes an alternative to public switched telephone networks (PSTN) due to its capability of transmission of voice as packets over IP networks. A lot of research has been done in analyzing the performances of VoIP traffic over WiMAX network. In this paper we review the analysis carried out by several authors for the most common VoIP codec's which are G.711, G.723.1 and G.729 over a WiMAX network using various service classes. The objective is to compare the results for different types of service classes with respect to the QoS parameters such as throughput, average delay and average jitter.