期刊名称：International Journal of Computer Science and Information Technologies
电子版ISSN：0975-9646
出版年度：2014
卷号：5
期号：2
页码：1577-1580
出版社：TechScience Publications
摘要：Voice over Internet protocol (VOIP) or IP Telephony is a technology that acts as an alternative approach to voice communication over Public Switched Telephone Network (PSTN). It supports the transmission of voice by encapsulating and routing voice packets over Internet Protocol. Its main objective is to cut off the cost for making long distance telephone calls. This paper discusses the overview, issues and challenges of VoIP and presents the comparative performance analysis of VoIP using EMODE-1 codec with respect to QoS metrics Packet Delivery Ratio, End- End-Delay, Packet Dropping Probability, Throughput, and Residual Energy. It compares three MANET routing protocols AODV, DSR, OLSR and analysis shows that OLSR is moderate than DSR and AODV with respect to QoS metrics End-end-delay and Packet Dropping Probability, supporting high residual energy.
