TY - JOUR
T1 - Multicast capacity of optical ring network with hotspot traffic
T2 - The bi-directional WDM packet ring
AU - An Der Heiden, Matthias
AU - Sortais, Michel
AU - Scheutzow, Michael
AU - Reisslein, Martin
AU - Maier, Martin
N1 - Funding Information:
Supported by the DFG Research Center Matheon “Mathematics for key technologies” in Berlin.
PY - 2012/1
Y1 - 2012/1
N2 - Packet-switching WDM ring networks with a hotspot transporting unicast, multicast, and broadcast traffic are important components of high-speed metropolitan area networks. For an arbitrary multicast fanout traffic model with uniform, hotspot destination, and hotspot source packet traffic, 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 traffic, and consequently multicast capacities of less than two simultaneous packet transmissions. We outline a one-copy routing strategy that guarantees a multicast capacity of at least two simultaneous packet transmissions for arbitrary hotspot source traffic.
AB - Packet-switching WDM ring networks with a hotspot transporting unicast, multicast, and broadcast traffic are important components of high-speed metropolitan area networks. For an arbitrary multicast fanout traffic model with uniform, hotspot destination, and hotspot source packet traffic, 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 traffic, and consequently multicast capacities of less than two simultaneous packet transmissions. We outline a one-copy routing strategy that guarantees a multicast capacity of at least two simultaneous packet transmissions for arbitrary hotspot source traffic.
KW - Hotspot traffic
KW - Multicast
KW - Packet throughput
KW - Shortest path routing
KW - Spatial reuse
KW - Wavelength division multiplexing (WDM)
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U2 - 10.1016/j.osn.2011.05.002
DO - 10.1016/j.osn.2011.05.002
M3 - Article
AN - SCOPUS:80054006776
SN - 1573-4277
VL - 9
SP - 61
EP - 80
JO - Optical Switching and Networking
JF - Optical Switching and Networking
IS - 1
ER -