Multicast Capacity of Optical WDM Packet Ring for Hotspot Traffic

Packet-switching WDM ring networks with a hotspot transporting unicast, multicast, and broadcast trac are important components of high-speed metropolitan area networks. For an arbitrary multicast fanout trac model with uniform, hotspot destination, and hotspot source packet trac, we analyze the maximum achievable long-run average packet throughput, which we refer to as multicast capacity, of bi-directional shortest-path routed WDM rings. We identify three segments that can experience the maximum utilization, and thus, limit the multicast capacity. We characterize the segment utilization probabilities through bounds and approximations, which we verify through simulations. We discover that shortest-path routing can lead to utilization probabilities above one half for moderate to large portions of hotspot source multi- and broadcast trac, and consequently multicast capacities of less than two simultaneous packet transmissions. We outline a one-copy routing strategy that guarantees a multi...

• Type: Journal
• Year: 2008
• Where: CORR
• Authors: Matthias an der Heiden, Michel Sortais, Michael Scheutzow, Martin Reisslein, Martin Maier
• Keywords: CORR 2008, Education, Hotspot, Multicast, Multicast Capacity