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Mobile IPv6 Latency and Throughput Characterization for Multimedia & VoIP Applications Wireless networks are beginning to be use more and more for multimedia and VoIP type applications. Because of this, connectivity is a significant issue. Mobile IPv6 is an extension of the standard protocol and helps to maintain transmission between mobile devices when the devices are being moved from one wireless network to another. There are two important factors are to be taken into consideration. One major factor is latency and the other is throughput. Specifically these two factors are to be observed when there is a handoff from one network to another network. In a standard mobile IP configuration, the mobile IP node is far away from its home agent and as a result, a significant amount of packets are lost during the hand off. The main objective of this study is to build a mobile IPv6 simulation model with routing optimization and (a) observe and characterize the latency and throughput when there are hand offs from one network to another and (b) present a new framework that could improve throughput. Using Multi-Protocol Label Switching (MPLS) for Multimedia Applications It is believed that Multi-Protocol Label Switching (MPLS) is very beneficial in managing multimedia traffic when some links or paths are under and/or over utilized. This paper presents the benefits of using MPLS along with substantial evidence. A comparative analysis of an MPLS and non-MPLS network is provided when a high-traffic generating audio and video applications are implemented over a highly utilized network. Both audio and video type applications generate a significant amount of bytes per second. In addition to large traffic loads, voice and video traffic has to be transmitted in streams versus bursts in providing desired quality-of-service levels. This study shows that Multi-Protocol Label Switching (MPLS) can improve network performance for audio and video conferencing type applications in heavy traffic environments. MPLS facilitates a method where streams of video and voice IP packets traverse through a switched network without changing their structure. With MPLS, the processing time for these IP packets is supposedly reduced at each Label Switching Router (LSR) because the need for a layer-3 lookup is eliminated. Routing information is also reduced in MPLS-based networks because network traffic can be directed to utilize links and nodes having less congestion and/or lower cost association. Traffic engineering is the main strength of MPLS. Where an IP-based network is connectionless, an MPLS-based network defines definite paths for network traffic based on some quality-of-service level. The following simulation study is an effort to quantitatively illustrate the benefit of using MPLS in implementing audio and video applications in a heavy traffic environment. The study is divided into four parts, and they are listed below · A non-MPLS network for high-traffic voice conferencing applications · A MPLS enabled network for high-traffic voice conferencing applications · A non-MPLS network for high-traffic video conferencing applications · A MPLS enabled network for high-traffic video conferencing applications OPNET Technologies, Inc. is a leading provider of solutions for managing networks and applications. OPNET's best-in-class solutions address application troubleshooting, application monitoring, network monitoring, network configuration management, capacity management, and network simulation. OPNET’s solutions have been operationally proven in thousands of customer environments worldwide, including corporate and government enterprises, government and defense agencies, network service providers, and network equipment manufacturers. For more information about OPNET and its products, visit www.opnet.com. |
