50 International Journal of Interdisciplinary Telecommunications and Networking, 2(2), 50-57, April-June 2010 Copyright © 2010, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Keywords: Latency, Multi-pass Algorithm, Multicast Routing, Multipoint Communication, Network Topology InTroduCTIon According to AT&T Labs Research (Erman et al., 2009), HTTP is 68% of downstream Internet traffic and 34% of that traffic is multimedia. Multimedia content using HTTP has a 83% annualized growth rate versus the 26% over all annual growth rate of broadband traffic. More multimedia content becomes available every year. Every minute, ten hours of video is uploaded to YouTube (YouTube fact sheet). Furthermore, increasing popularity of multi- party video conferencing and computer games places higher load on service providers and A Multi-Pass Algorithm for Adjusting a network Topology in Multipoint Communications Boris Peltsverger, Georgia Southwestern State University, USA Svetlana Peltsverger, Southern Polytechnic State University, USA Michael Bartolacci, Penn State University - Berks, USA AbSTrACT Multimedia traffc on the Internet has grown dramatically in the past few years. Web sites, such as YouTube and Hulu, offer entertainment and educational multimedia content that previously was only available through broadcast or cable television and on storage media, such as CD-ROMs and videotapes. Latency is a key is- sue in the delivery of online content, especially with respect to multicasting. The authors’ proposed approach seeks to reduce overall latency for multicast streams. affects user experience. This paper presents a new approach to management of multicasting in multipoint collaboration. Latency is a critical issue, especially in a peer-to-peer multicasting (Setton & Girod, 2009), (Sinnreich, 2006). The proposed approach allows minimizing a sum of delays by measuring multicast streams and changing a routing tree accordingly. Multiparty conferencing allows exchang- ing information among a set of participants. Type of communication can be text (chat), voice, video, application sharing, and multiplayer Internet games. Some of these applications require not only minimum delays, but “fair” delays, that allow all users to receive informa- tion at the same time. It can be achieved by DOI: 10.4018/jitn.2010040103