Reliability assessment of optical p-cycles
IEEE/ACM Transactions on Networking (TON)
The perspective of optical packet switching in IP dominant backbone and metropolitan networks
IEEE Communications Magazine
All-optical packet switching for metropolitan area networks: opportunities and challenges
IEEE Communications Magazine
Automatic protection switching for p-cycles in WDM networks
Optical Switching and Networking
Extending the p-cycle concept to path segment protection for span and node failure recovery
IEEE Journal on Selected Areas in Communications
Optical burst switching: a viable solution for terabit IP backbone
IEEE Network: The Magazine of Global Internetworking
Computer Networks: The International Journal of Computer and Telecommunications Networking
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The distribution of multicast traffic (e.g. IPTV or business point-to-multipoint) in the metropolitan environment requires highly resilient network infrastructures. Currently-deployed fibre ducts in the metropolitan area are typically based on ring topologies interconnected by the dual homing approach. In this study, an easy evolution towards meshed topologies is proposed, based on Double Rings with Dual Attachments (DRDA). This work analyses in detail the resilience capabilities of DRDAs and the two dual p-cycles defined over them. It is shown that, just by ensuring service repair rates of 12h, large service availability values can be achieved (of the order of four to five-nines). Additionally, the amount of backup capacity required to recover from link failures is further calculated in this paper. Furthermore, this work gives a mathematical framework or reference to all those network operators who are willing to deploy highly resilient metropolitan area networks at a moderate cost. The five-nines service availability degree is easily achieved provided sufficiently small service repair times (in the range of 12h). Additionally, large service availability values are obtained with little extra backup capacity (about three-nines with only doubling capacity).