Demand assigned capacity management (DACM) in IP over optical (IPO) networks
IEEE/ACM Transactions on Networking (TON)
Logical topology design for IP rerouting: ASONs versus static OTNs
Photonic Network Communications
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The optical layer can provide its IP clients with rapid and efficient restoration for link failures; however, its inability to protect against router failures erodes its attractiveness. Here, we propose a joint IP/optical restoration mechanism suitable for IP offices with a minimum of two backbone routers and an optical cross-connect. The OXC is used to reterminate OC-48/OC-192 links from a failed backbone router to its mate. The entire interoffice portion of the reterminated link is reused, thus minimizing the amount of additional link capacity required to protect against router failures. A similar approach applicable when there are tunable transceivers but no OXC is also described.