Multicast capacity of optical packet ring for hotspot traffic

Matthias an der Heiden, Michel Sortais, Michael Scheutzow, Martin Reisslein, Patrick Seeling, Martin Herzog, Martin Maier

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Hotspot traffic is common in metro ring networks connecting access networks with backbone networks, and these metro rings are also expected to support a mix of unicast, multicast, and broadcast traffic. Shortest path (SP) routing, as employed in the IEEE 802.17 Resilient Packet Ring (RPR), is widely considered for metro rings as it maximizes spatial reuse and, thus, the achievable packet throughput (capacity) for uniform traffic. In this paper, we analyze the capacity of bidirectional optical ring networks, such as RPR, employing SP routing for multicast (nonuniform) hotspot traffic (whereby unicast and broadcast are considered as special cases of multicast). We find that, when the traffic originating at the hotspot exceeds a critical threshold, then SP routing leads to substantial reductions in capacity to a value close to one simultaneous packet transmission. To overcome this limitation of SP routing, we propose a simple combined SP/one-copy routing strategy that provides a capacity of at least two simultaneous packet transmissions.

Original languageEnglish
Pages (from-to)2638-2652
Number of pages15
JournalJournal of Lightwave Technology
Issue number9
StatePublished - Sep 2007


  • Hotspot traffic
  • Multicast
  • Packet throughput
  • Shortest path (SP) routing
  • Spatial reuse


Dive into the research topics of 'Multicast capacity of optical packet ring for hotspot traffic'. Together they form a unique fingerprint.

Cite this