Analysis Performance VoIP Codecs over WiMAX Access Network

International Journal of Computer Applications, 2012

Worldwide Interoperability for Microwave Access (WiMAX) is currently one of the hottest technologies in wireless, it's a standard-based on the IEEE 802.16 wireless technology that provides high throughput broadband connections over long distance, which supports Point to Multi-point (PMP) broadband wireless access. In parallel, voice Over Internet Protocol is a promising new technology which provides access to voice communication over internet protocol based network, it becomes an alternative to public switched telephone networks due to its capability of transmission of voice as packets over IP networks. Therefore VoIP is largely intolerant of delay and hence it needs a high priority transmission. In this paper we investigate the performances of the most common VoIP codecs, which are G.711, G.723.1 and G.729 over a WiMAX network using various service classes and NOAH as a transport protocol. To analyze the QoS parameters, the popular network simulator ns-2 was used. Various parameters that determine QoS of real life usage scenarios and traffic flows of applications is analyzed. The objective is to compare different types of service classes with respect to the QoS parameters, such as, throughput, average jitter and average delay.

Communications on Applied Electronics, 2015

In telecommunication, traditionally telephone networks uses basic concept called circuit switching for doing communication between sender and receiver such as Public Switched Telephone Network (PSTN). Nowadays this type of switching is being replaced by packet switching where the transmission of data is done in packets and networks based on this are referred to as connectionless networks. Voice over Internet Protocol (VOIP) is an emerging technology which is based on packet switching and is going to be used for the transmission of voice and multimedia over the Internet Protocol (IP) based network, especially the Internet. Another is WiMAX Technology which is also an upcoming wireless technology that provides us high speed mobile data and telecommunication services. These technologies are in use to replace the traditional telephone networks i.e., Public Switched Telephone Network (PSTN). In this paper performance of such networks which uses VOIP technology is investigated and for which OPNET 14.5 Simulator is chosen as the platform. OPNET Simulator provides simulated reallife environment, in order to study the performance of the next generation networks. The parameters used to evaluate the performance of the networks are jitter and end to end delay. Finally based on the simulations best VOIP codec is also found out.

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.

International Journal of Intelligent Systems Design and Computing, 2018

Circuit switched network or packet switched networks are used for both visual and vocal communication. Public switched telephone network (PSTN) is not an affordable option when comparing with existing packet switched network. Voice over internet protocol (VoIP) has become a preferable alternative due to its reduced cost and flexibility compared to voice over LTE (VoLTE) where carriers are still building out their 4G networks. However, despite its reduced cost, it has to face so many challenges which affect its successful deployment. The reason is that the quality of VoIP is mainly affected by jitter, delay, packet loss and various other parameters. This research was carried out to evaluate the quality of voice in VoIP experimentally, under the effect of interference and during conference calls. The simulations were carried out using Riverbed Modeler academic edition 17.5. The results of the analysis and the performance evaluation are presented in this paper. This work can guide researchers and designers to design a network for VoIP services and its deployment based on their requirements.

Today’s telecom industry demands not only good voice communication but simultaneously it demands data & video service. VOIP is one of the best solutions for it. Covering a large area Last Mile Winner WiMAX can be utilized. As Service providers’ target to accommodate maximum number of user so network designer design network in such a manner whose installation and running cost will be minimum. System performance can be improved by two manners a) improving average MOS≥3 or b) Keeping average MOS ≤ 2 & minimizing jitter and delay. Cost of designing a network will be moderated if we choose second procedure. Jitter and Delay will depend on routing protocol by which average MOS is also varies. This paper will verify the Average MOS values for different routing algorithm & codec. Finally it will conclude with best codec & routing protocol]s. Keywords- VOIP, WiMAX, average MOS, Jitter, Delay

Journal of Engineering Research and Reports

The use of technology has impacted on communication in so many ways. The advent of voice over internet protocols (VoIP) has made the world a global village where one can reach out to any part of the universe. But a challenge exists as to how to make communication and data transmission faster, the volume of traffic, bandwidth and latency in networks, that has to be transmitted between the sender and the receiver. The overall customer experience can be improved by the use of technology, which also makes it simpler to collect client information. Data packets are addressed and routed by the Internet Protocol (IP). This research aimed at deploying jitter, throughput, network traffic delay and bandwidth (JiTTraB) as a performance metrics to measure voice over internet protocols (VoIP) to measure the Quality of Service (QoS) of networks. This method prioritizes network traffic going through a router and providing acceptable service to most users in a quest to address VoIP concerns. In comp...

International Journal of Advance Engineering and Research Development, 2015

The Voice-Over Internet Protocol (VoIP) technology allows the voice information and the video traffic to pass over the IP network using the existing infrastructure. WiMAX (Worldwide interoperability for micro wave access technology) is a technology based on IEEE 802.16 standard, which provides broadband service for fixed and mobile users over long distances at high speed. Modulation and coding is one of th e features of PHY layer which is used to load the data in the uplink and downlink during transmission. The existing system selects the MCS based on the channel quality.Modulation and coding scheme can also be selected based on the type of traffic used. This paper focuses on the physical layer design aspect namely modulation and coding scheme(MCS) for the VOIP traffic over WiMAX. The simulation is done for fixed WiMAX environment. Throughput and packet delay is taken as the main parameter for evaluating the performance of WiMAX. This paper focuses on selecting appropriate Modulation and encoding scheme over the WiMAX network for the voice and video application.

In this Paper, the objective of simulation models is presented to investigate the performance of VoIP codecs over WiMAX and FDDI networks that specially design for Aden University. To assure if the University IP network is prepared and adequate for this new type of traffic before adding any new components, Aden University IP network will be simulated by using OPNET simulation software then the new VoIP service will be added to the University networks. Different parameters that represent the QoS like end to end delay, jitter, traffic sends and traffic received, MOS are calculated and analyzed in both network scenarios.

International Journal of Wireless and Microwave Technologies, 2016

WiMAX is a wireless broadband technology, which promises maximum coverage area and high data rates. WiMAX provides last mile connectivity. This network defines two working models such as fixed WiMAX and mobile WiMAX. The main aim of this paper is to compare and also analyze the performance of the VoIP application over fixed and mobile WiMAX, with respect to various codecs such as G.711, G.723.1ar5.3, G.726ar24, G.728ar16 and G.729. We have considered few QoS parameters such as average end-to-end delay, throughput, average jitter, average one-way delay and average MOS. From the obtained result, codec G.711 and G.726ar24 performs better when compared to other codecs in both fixed and mobile WiMAX network.