Hierarchical Networks for Optical Communications

✍ Scribed by Kyungsook Y. Lee; Guoping Liu; Harry F. Jordan

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 375 KB
• Volume: 60
• Category: Article
• ISSN: 0743-7315
• DOI: 10.1006/jpdc.1999.1591

✦ Synopsis

ShuffleNet and de Bruijn networks have been proposed as multihop lightwave networks based on wavelength division multiplexing (WDM). With multihop lightwave networks, few fixed wavelength transmittersÂreceivers are assigned to each user, eliminating the need for wavelength agility and pretransmission coordination. These networks have been shown to be very effective for uniform traffic. For communications with high locality, we propose two-level hierarchical networks. At the first level, each cluster of users can be connected either via a ShuffleNet (SH) or a de Bruijn network (dB). At the second level, all the clusters in the system can be connected by two rings in opposite directions (SHÂRing and dBÂRing), a de Bruijn network (dBÂdB), or a ShuffleNet (SHÂSH). The performance of ShuffleNet, de Bruijn networks, and the hierarchical networks SHÂRing, dBÂRing, dBÂdB, and SHÂSH is analyzed. For communications with a high locality, the hierarchical networks are shown to be very effective.