This paper defines simple guidelines for network dimensioning in a multimedia environment in terms of end-to-end delay for the voice traffic, and in terms of throughput and packet loss for TCP data traffic. | ISSN:2249-5789 Sandeep Kamra et al, International Journal of Computer Science & Communication Networks,Vol 2(2), 284-287 Simulation of VoIP over UDP with Bandwidth on Demand Analysis Sandeep Kamra, Kunal Gupta Amity University, Noida Abstract This paper analyses resource provisioning for enterprise Voice-over-IP (VoIP) networks. Simulation and analytical methods are used to enhance the provisioning process, which ultimately aims to provide the Bandwidth and its availability. This paper defines simple guidelines for network dimensioning in a multimedia environment in terms of end-to-end delay for the voice traffic, and in terms of throughput and packet loss for TCP data traffic. A realistic environment is modelled and simulated using ns-2. The model consists of a prioritized network in which intermediate routers perform priority scheduling to provide differentiation of Internet services. 1. Introduction The increase in both popularity and capacity of the Internet has led to the increasing need to provide real-time voice and video services to the network. While the potential benefits of these services are enormous, the process of adapting the connectionless data-oriented design of IP networks to real-time traffic is rather slow. Recently, we have seen two major trends in the area of communications. First, IEEE WLANs have been widely deployed in the world. Second, due to the growth of Internet bandwidth, real-time audio and video applications have become more mature and popular. The combined effect has made VoIP (voice over IP) over WLANs possible. Although VoIP involves the transmission of digitized voice in packets, the telephone itself may be analog or digital. The voice may be digitized and encoded either before or concurrently with packetization. 2. is an ITU-T standard for audio companding. It is primarily used in telephony. The standard was released for usage in 1972. Its formal name is Pulse code modulation .
